HCI registers as an nfc device with NFC Core. Requests coming from userspace are
routed through netlink sockets to NFC Core and then to HCI. From this point,
they are translated in a sequence of HCI commands sent to the HCI layer in the
-host controller (the chip). The sending context blocks while waiting for the
-response to arrive.
+host controller (the chip). Commands can be executed synchronously (the sending
+context blocks waiting for response) or asynchronously (the response is returned
+from HCI Rx context).
HCI events can also be received from the host controller. They will be handled
-and a translation will be forwarded to NFC Core as needed.
+and a translation will be forwarded to NFC Core as needed. There are hooks to
+let the HCI driver handle proprietary events or override standard behavior.
HCI uses 2 execution contexts:
- one for executing commands : nfc_hci_msg_tx_work(). Only one command
can be executing at any given moment.
support proprietary gates. This is the reason why the driver will pass a list
of proprietary gates that must be part of the session. HCI will ensure all
those gates have pipes connected when the hci device is set up.
+In case the chip supports pre-opened gates and pseudo-static pipes, the driver
+can pass that information to HCI core.
HCI Gates and Pipes
-------------------
Driver interface
----------------
+A driver is generally written in two parts : the physical link management and
+the HCI management. This makes it easier to maintain a driver for a chip that
+can be connected using various phy (i2c, spi, ...)
+
+HCI Management
+--------------
+
A driver would normally register itself with HCI and provide the following
entry points:
int (*open)(struct nfc_hci_dev *hdev);
void (*close)(struct nfc_hci_dev *hdev);
int (*hci_ready) (struct nfc_hci_dev *hdev);
- int (*xmit)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
- int (*start_poll)(struct nfc_hci_dev *hdev, u32 protocols);
- int (*target_from_gate)(struct nfc_hci_dev *hdev, u8 gate,
- struct nfc_target *target);
+ int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
+ int (*start_poll) (struct nfc_hci_dev *hdev,
+ u32 im_protocols, u32 tm_protocols);
+ int (*dep_link_up)(struct nfc_hci_dev *hdev, struct nfc_target *target,
+ u8 comm_mode, u8 *gb, size_t gb_len);
+ int (*dep_link_down)(struct nfc_hci_dev *hdev);
+ int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
+ struct nfc_target *target);
int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
struct nfc_target *target);
- int (*data_exchange) (struct nfc_hci_dev *hdev,
- struct nfc_target *target,
- struct sk_buff *skb, struct sk_buff **res_skb);
+ int (*im_transceive) (struct nfc_hci_dev *hdev,
+ struct nfc_target *target, struct sk_buff *skb,
+ data_exchange_cb_t cb, void *cb_context);
+ int (*tm_send)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
int (*check_presence)(struct nfc_hci_dev *hdev,
struct nfc_target *target);
+ int (*event_received)(struct nfc_hci_dev *hdev, u8 gate, u8 event,
+ struct sk_buff *skb);
};
- open() and close() shall turn the hardware on and off.
- hci_ready() is an optional entry point that is called right after the hci
session has been set up. The driver can use it to do additional initialization
that must be performed using HCI commands.
-- xmit() shall simply write a frame to the chip.
+- xmit() shall simply write a frame to the physical link.
- start_poll() is an optional entrypoint that shall set the hardware in polling
mode. This must be implemented only if the hardware uses proprietary gates or a
mechanism slightly different from the HCI standard.
+- dep_link_up() is called after a p2p target has been detected, to finish
+the p2p connection setup with hardware parameters that need to be passed back
+to nfc core.
+- dep_link_down() is called to bring the p2p link down.
- target_from_gate() is an optional entrypoint to return the nfc protocols
corresponding to a proprietary gate.
- complete_target_discovered() is an optional entry point to let the driver
perform additional proprietary processing necessary to auto activate the
discovered target.
-- data_exchange() must be implemented by the driver if proprietary HCI commands
+- im_transceive() must be implemented by the driver if proprietary HCI commands
are required to send data to the tag. Some tag types will require custom
commands, others can be written to using the standard HCI commands. The driver
can check the tag type and either do proprietary processing, or return 1 to ask
-for standard processing.
+for standard processing. The data exchange command itself must be sent
+asynchronously.
+- tm_send() is called to send data in the case of a p2p connection
- check_presence() is an optional entry point that will be called regularly
by the core to check that an activated tag is still in the field. If this is
not implemented, the core will not be able to push tag_lost events to the user
space
+- event_received() is called to handle an event coming from the chip. Driver
+can handle the event or return 1 to let HCI attempt standard processing.
On the rx path, the driver is responsible to push incoming HCP frames to HCI
using nfc_hci_recv_frame(). HCI will take care of re-aggregation and handling
This must be done from a context that can sleep.
-SHDLC
------
+PHY Management
+--------------
+
+The physical link (i2c, ...) management is defined by the following struture:
+
+struct nfc_phy_ops {
+ int (*write)(void *dev_id, struct sk_buff *skb);
+ int (*enable)(void *dev_id);
+ void (*disable)(void *dev_id);
+};
+
+enable(): turn the phy on (power on), make it ready to transfer data
+disable(): turn the phy off
+write(): Send a data frame to the chip. Note that to enable higher
+layers such as an llc to store the frame for re-emission, this function must
+not alter the skb. It must also not return a positive result (return 0 for
+success, negative for failure).
+
+Data coming from the chip shall be sent directly to nfc_hci_recv_frame().
+
+LLC
+---
+
+Communication between the CPU and the chip often requires some link layer
+protocol. Those are isolated as modules managed by the HCI layer. There are
+currently two modules : nop (raw transfert) and shdlc.
+A new llc must implement the following functions:
+
+struct nfc_llc_ops {
+ void *(*init) (struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+ rcv_to_hci_t rcv_to_hci, int tx_headroom,
+ int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+ llc_failure_t llc_failure);
+ void (*deinit) (struct nfc_llc *llc);
+ int (*start) (struct nfc_llc *llc);
+ int (*stop) (struct nfc_llc *llc);
+ void (*rcv_from_drv) (struct nfc_llc *llc, struct sk_buff *skb);
+ int (*xmit_from_hci) (struct nfc_llc *llc, struct sk_buff *skb);
+};
+
+- init() : allocate and init your private storage
+- deinit() : cleanup
+- start() : establish the logical connection
+- stop () : terminate the logical connection
+- rcv_from_drv() : handle data coming from the chip, going to HCI
+- xmit_from_hci() : handle data sent by HCI, going to the chip
-Most chips use shdlc to ensure integrity and delivery ordering of the HCP
-frames between the host controller (the chip) and hosts (entities connected
-to the chip, like the cpu). In order to simplify writing the driver, an shdlc
-layer is available for use by the driver.
-When used, the driver actually registers with shdlc, and shdlc will register
-with HCI. HCI sees shdlc as the driver and thus send its HCP frames
-through shdlc->xmit.
-SHDLC adds a new execution context (nfc_shdlc_sm_work()) to run its state
-machine and handle both its rx and tx path.
+The llc must be registered with nfc before it can be used. Do that by
+calling nfc_llc_register(const char *name, struct nfc_llc_ops *ops);
+
+Again, note that the llc does not handle the physical link. It is thus very
+easy to mix any physical link with any llc for a given chip driver.
Included Drivers
----------------
The execution contexts are the following:
- IRQ handler (IRQH):
-fast, cannot sleep. stores incoming frames into an shdlc rx queue
+fast, cannot sleep. sends incoming frames to HCI where they are passed to
+the current llc. In case of shdlc, the frame is queued in shdlc rx queue.
- SHDLC State Machine worker (SMW)
-handles shdlc rx & tx queues. Dispatches HCI cmd responses.
+Only when llc_shdlc is used: handles shdlc rx & tx queues.
+Dispatches HCI cmd responses.
- HCI Tx Cmd worker (MSGTXWQ)
Serializes execution of HCI commands. Completes execution in case of response
callback that was provided by nfc_hci_msg_tx_work() when it sent the command.
The completion callback will then wake the syscall context.
+It is also possible to execute the command asynchronously using this API:
+
+static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
+ const u8 *param, size_t param_len,
+ data_exchange_cb_t cb, void *cb_context)
+
+The workflow is the same, except that the API call returns immediately, and
+the callback will be called with the result from the SMW context.
+
Workflow receiving an HCI event or command
------------------------------------------
Kernel driver for the NXP Semiconductors PN544 Near Field
Communication chip
-Author: Jari Vanhala
-Contact: Matti Aaltonen (matti.j.aaltonen at nokia.com)
-
General
-------
The PN544 is an integrated transmission module for contactless
communication. The driver goes under drives/nfc/ and is compiled as a
-module named "pn544". It registers a misc device and creates a device
-file named "/dev/pn544".
+module named "pn544".
Host Interfaces: I2C, SPI and HSU, this driver supports currently only I2C.
-The Interface
--------------
-
-The driver offers a sysfs interface for a hardware test and an IOCTL
-interface for selecting between two operating modes. There are read,
-write and poll functions for transferring messages. The two operating
-modes are the normal (HCI) mode and the firmware update mode.
-
-PN544 is controlled by sending messages from the userspace to the
-chip. The main function of the driver is just to pass those messages
-without caring about the message content.
-
-
Protocols
---------
For the ETSI HCI specification see
http://www.etsi.org/WebSite/Technologies/ProtocolSpecification.aspx
-
-The Hardware Test
------------------
-
-The idea of the test is that it can performed by reading from the
-corresponding sysfs file. The test is implemented in the board file
-and it should test that PN544 can be put into the firmware update
-mode. If the test is not implemented the sysfs file does not get
-created.
-
-Example:
-> cat /sys/module/pn544/drivers/i2c\:pn544/3-002b/nfc_test
-1
-
-Normal Operation
-----------------
-
-PN544 is powered up when the device file is opened, otherwise it's
-turned off. Only one instance can use the device at a time.
-
-Userspace applications control PN544 with HCI messages. The hardware
-sends an interrupt when data is available for reading. Data is
-physically read when the read function is called by a userspace
-application. Poll() checks the read interrupt state. Configuration and
-self testing are also done from the userspace using read and write.
-
-Example platform data:
-
-static int rx71_pn544_nfc_request_resources(struct i2c_client *client)
-{
- /* Get and setup the HW resources for the device */
-}
-
-static void rx71_pn544_nfc_free_resources(void)
-{
- /* Release the HW resources */
-}
-
-static void rx71_pn544_nfc_enable(int fw)
-{
- /* Turn the device on */
-}
-
-static int rx71_pn544_nfc_test(void)
-{
- /*
- * Put the device into the FW update mode
- * and then back to the normal mode.
- * Check the behavior and return one on success,
- * zero on failure.
- */
-}
-
-static void rx71_pn544_nfc_disable(void)
-{
- /* turn the power off */
-}
-
-static struct pn544_nfc_platform_data rx71_nfc_data = {
- .request_resources = rx71_pn544_nfc_request_resources,
- .free_resources = rx71_pn544_nfc_free_resources,
- .enable = rx71_pn544_nfc_enable,
- .test = rx71_pn544_nfc_test,
- .disable = rx71_pn544_nfc_disable,
-};
menu "Near Field Communication (NFC) devices"
depends on NFC
-config PN544_HCI_NFC
- tristate "HCI PN544 NFC driver"
- depends on I2C && NFC_HCI && NFC_SHDLC
- select CRC_CCITT
- default n
- ---help---
- NXP PN544 i2c driver.
- This is a driver based on the SHDLC and HCI NFC kernel layers and
- will thus not work with NXP libnfc library.
-
- To compile this driver as a module, choose m here. The module will
- be called pn544_hci.
-
config NFC_PN533
tristate "NXP PN533 USB driver"
depends on USB
Say Y here to compile support for Texas Instrument's NFC WiLink driver
into the kernel or say M to compile it as module.
+source "drivers/nfc/pn544/Kconfig"
+source "drivers/nfc/microread/Kconfig"
+
endmenu
# Makefile for nfc devices
#
-obj-$(CONFIG_PN544_HCI_NFC) += pn544/
+obj-$(CONFIG_NFC_PN544) += pn544/
+obj-$(CONFIG_NFC_MICROREAD) += microread/
obj-$(CONFIG_NFC_PN533) += pn533.o
obj-$(CONFIG_NFC_WILINK) += nfcwilink.o
--- /dev/null
+config NFC_MICROREAD
+ tristate "Inside Secure microread NFC driver"
+ depends on NFC_HCI
+ select CRC_CCITT
+ default n
+ ---help---
+ This module contains the main code for Inside Secure microread
+ NFC chipsets. It implements the chipset HCI logic and hooks into
+ the NFC kernel APIs. Physical layers will register against it.
+
+ To compile this driver as a module, choose m here. The module will
+ be called microread.
+ Say N if unsure.
+
+config NFC_MICROREAD_I2C
+ tristate "NFC Microread i2c support"
+ depends on NFC_MICROREAD && I2C && NFC_SHDLC
+ ---help---
+ This module adds support for the i2c interface of adapters using
+ Inside microread chipsets. Select this if your platform is using
+ the i2c bus.
+
+ If you choose to build a module, it'll be called microread_i2c.
+ Say N if unsure.
+
+config NFC_MICROREAD_MEI
+ tristate "NFC Microread MEI support"
+ depends on NFC_MICROREAD && INTEL_MEI_BUS_NFC
+ ---help---
+ This module adds support for the mei interface of adapters using
+ Inside microread chipsets. Select this if your microread chipset
+ is handled by Intel's Management Engine Interface on your platform.
+
+ If you choose to build a module, it'll be called microread_mei.
+ Say N if unsure.
--- /dev/null
+#
+# Makefile for Microread HCI based NFC driver
+#
+
+microread_i2c-objs = i2c.o
+microread_mei-objs = mei.o
+
+obj-$(CONFIG_NFC_MICROREAD) += microread.o
+obj-$(CONFIG_NFC_MICROREAD_I2C) += microread_i2c.o
+obj-$(CONFIG_NFC_MICROREAD_MEI) += microread_mei.o
--- /dev/null
+/*
+ * HCI based Driver for Inside Secure microread NFC Chip - i2c layer
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+
+#include <linux/nfc.h>
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "microread.h"
+
+#define MICROREAD_I2C_DRIVER_NAME "microread"
+
+#define MICROREAD_I2C_FRAME_HEADROOM 1
+#define MICROREAD_I2C_FRAME_TAILROOM 1
+
+/* framing in HCI mode */
+#define MICROREAD_I2C_LLC_LEN 1
+#define MICROREAD_I2C_LLC_CRC 1
+#define MICROREAD_I2C_LLC_LEN_CRC (MICROREAD_I2C_LLC_LEN + \
+ MICROREAD_I2C_LLC_CRC)
+#define MICROREAD_I2C_LLC_MIN_SIZE (1 + MICROREAD_I2C_LLC_LEN_CRC)
+#define MICROREAD_I2C_LLC_MAX_PAYLOAD 29
+#define MICROREAD_I2C_LLC_MAX_SIZE (MICROREAD_I2C_LLC_LEN_CRC + 1 + \
+ MICROREAD_I2C_LLC_MAX_PAYLOAD)
+
+struct microread_i2c_phy {
+ struct i2c_client *i2c_dev;
+ struct nfc_hci_dev *hdev;
+
+ int irq;
+
+ int hard_fault; /*
+ * < 0 if hardware error occured (e.g. i2c err)
+ * and prevents normal operation.
+ */
+};
+
+#define I2C_DUMP_SKB(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump(KERN_DEBUG, "i2c: ", DUMP_PREFIX_OFFSET, \
+ 16, 1, (skb)->data, (skb)->len, 0); \
+} while (0)
+
+static void microread_i2c_add_len_crc(struct sk_buff *skb)
+{
+ int i;
+ u8 crc = 0;
+ int len;
+
+ len = skb->len;
+ *skb_push(skb, 1) = len;
+
+ for (i = 0; i < skb->len; i++)
+ crc = crc ^ skb->data[i];
+
+ *skb_put(skb, 1) = crc;
+}
+
+static void microread_i2c_remove_len_crc(struct sk_buff *skb)
+{
+ skb_pull(skb, MICROREAD_I2C_FRAME_HEADROOM);
+ skb_trim(skb, MICROREAD_I2C_FRAME_TAILROOM);
+}
+
+static int check_crc(struct sk_buff *skb)
+{
+ int i;
+ u8 crc = 0;
+
+ for (i = 0; i < skb->len - 1; i++)
+ crc = crc ^ skb->data[i];
+
+ if (crc != skb->data[skb->len-1]) {
+ pr_err(MICROREAD_I2C_DRIVER_NAME
+ ": CRC error 0x%x != 0x%x\n",
+ crc, skb->data[skb->len-1]);
+
+ pr_info(DRIVER_DESC ": %s : BAD CRC\n", __func__);
+
+ return -EPERM;
+ }
+
+ return 0;
+}
+
+static int microread_i2c_enable(void *phy_id)
+{
+ return 0;
+}
+
+static void microread_i2c_disable(void *phy_id)
+{
+ return;
+}
+
+static int microread_i2c_write(void *phy_id, struct sk_buff *skb)
+{
+ int r;
+ struct microread_i2c_phy *phy = phy_id;
+ struct i2c_client *client = phy->i2c_dev;
+
+ if (phy->hard_fault != 0)
+ return phy->hard_fault;
+
+ usleep_range(3000, 6000);
+
+ microread_i2c_add_len_crc(skb);
+
+ I2C_DUMP_SKB("i2c frame written", skb);
+
+ r = i2c_master_send(client, skb->data, skb->len);
+
+ if (r == -EREMOTEIO) { /* Retry, chip was in standby */
+ usleep_range(6000, 10000);
+ r = i2c_master_send(client, skb->data, skb->len);
+ }
+
+ if (r >= 0) {
+ if (r != skb->len)
+ r = -EREMOTEIO;
+ else
+ r = 0;
+ }
+
+ microread_i2c_remove_len_crc(skb);
+
+ return r;
+}
+
+
+static int microread_i2c_read(struct microread_i2c_phy *phy,
+ struct sk_buff **skb)
+{
+ int r;
+ u8 len;
+ u8 tmp[MICROREAD_I2C_LLC_MAX_SIZE - 1];
+ struct i2c_client *client = phy->i2c_dev;
+
+ pr_debug("%s\n", __func__);
+
+ r = i2c_master_recv(client, &len, 1);
+ if (r != 1) {
+ dev_err(&client->dev, "cannot read len byte\n");
+ return -EREMOTEIO;
+ }
+
+ if ((len < MICROREAD_I2C_LLC_MIN_SIZE) ||
+ (len > MICROREAD_I2C_LLC_MAX_SIZE)) {
+ dev_err(&client->dev, "invalid len byte\n");
+ pr_err("invalid len byte\n");
+ r = -EBADMSG;
+ goto flush;
+ }
+
+ *skb = alloc_skb(1 + len, GFP_KERNEL);
+ if (*skb == NULL) {
+ r = -ENOMEM;
+ goto flush;
+ }
+
+ *skb_put(*skb, 1) = len;
+
+ r = i2c_master_recv(client, skb_put(*skb, len), len);
+ if (r != len) {
+ kfree_skb(*skb);
+ return -EREMOTEIO;
+ }
+
+ I2C_DUMP_SKB("cc frame read", *skb);
+
+ r = check_crc(*skb);
+ if (r != 0) {
+ kfree_skb(*skb);
+ r = -EBADMSG;
+ goto flush;
+ }
+
+ skb_pull(*skb, 1);
+ skb_trim(*skb, (*skb)->len - MICROREAD_I2C_FRAME_TAILROOM);
+
+ usleep_range(3000, 6000);
+
+ return 0;
+
+flush:
+ if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0)
+ r = -EREMOTEIO;
+
+ usleep_range(3000, 6000);
+
+ return r;
+}
+
+static irqreturn_t microread_i2c_irq_thread_fn(int irq, void *phy_id)
+{
+ struct microread_i2c_phy *phy = phy_id;
+ struct i2c_client *client;
+ struct sk_buff *skb = NULL;
+ int r;
+
+ if (!phy || irq != phy->i2c_dev->irq) {
+ WARN_ON_ONCE(1);
+ return IRQ_NONE;
+ }
+
+ client = phy->i2c_dev;
+ dev_dbg(&client->dev, "IRQ\n");
+
+ if (phy->hard_fault != 0)
+ return IRQ_HANDLED;
+
+ r = microread_i2c_read(phy, &skb);
+ if (r == -EREMOTEIO) {
+ phy->hard_fault = r;
+
+ nfc_hci_recv_frame(phy->hdev, NULL);
+
+ return IRQ_HANDLED;
+ } else if ((r == -ENOMEM) || (r == -EBADMSG)) {
+ return IRQ_HANDLED;
+ }
+
+ nfc_hci_recv_frame(phy->hdev, skb);
+
+ return IRQ_HANDLED;
+}
+
+static struct nfc_phy_ops i2c_phy_ops = {
+ .write = microread_i2c_write,
+ .enable = microread_i2c_enable,
+ .disable = microread_i2c_disable,
+};
+
+static int microread_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct microread_i2c_phy *phy;
+ struct microread_nfc_platform_data *pdata =
+ dev_get_platdata(&client->dev);
+ int r;
+
+ dev_dbg(&client->dev, "client %p", client);
+
+ if (!pdata) {
+ dev_err(&client->dev, "client %p: missing platform data",
+ client);
+ return -EINVAL;
+ }
+
+ phy = devm_kzalloc(&client->dev, sizeof(struct microread_i2c_phy),
+ GFP_KERNEL);
+ if (!phy) {
+ dev_err(&client->dev, "Can't allocate microread phy");
+ return -ENOMEM;
+ }
+
+ i2c_set_clientdata(client, phy);
+ phy->i2c_dev = client;
+
+ r = request_threaded_irq(client->irq, NULL, microread_i2c_irq_thread_fn,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ MICROREAD_I2C_DRIVER_NAME, phy);
+ if (r) {
+ dev_err(&client->dev, "Unable to register IRQ handler");
+ return r;
+ }
+
+ r = microread_probe(phy, &i2c_phy_ops, LLC_SHDLC_NAME,
+ MICROREAD_I2C_FRAME_HEADROOM,
+ MICROREAD_I2C_FRAME_TAILROOM,
+ MICROREAD_I2C_LLC_MAX_PAYLOAD, &phy->hdev);
+ if (r < 0)
+ goto err_irq;
+
+ dev_info(&client->dev, "Probed");
+
+ return 0;
+
+err_irq:
+ free_irq(client->irq, phy);
+
+ return r;
+}
+
+static int microread_i2c_remove(struct i2c_client *client)
+{
+ struct microread_i2c_phy *phy = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+
+ microread_remove(phy->hdev);
+
+ free_irq(client->irq, phy);
+
+ return 0;
+}
+
+static struct i2c_device_id microread_i2c_id[] = {
+ { MICROREAD_I2C_DRIVER_NAME, 0},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, microread_i2c_id);
+
+static struct i2c_driver microread_i2c_driver = {
+ .driver = {
+ .name = MICROREAD_I2C_DRIVER_NAME,
+ },
+ .probe = microread_i2c_probe,
+ .remove = microread_i2c_remove,
+ .id_table = microread_i2c_id,
+};
+
+module_i2c_driver(microread_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
--- /dev/null
+/*
+ * HCI based Driver for Inside Secure microread NFC Chip
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/mei_cl_bus.h>
+
+#include <linux/nfc.h>
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "microread.h"
+
+#define MICROREAD_DRIVER_NAME "microread"
+
+struct mei_nfc_hdr {
+ u8 cmd;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+} __attribute__((packed));
+
+#define MEI_NFC_HEADER_SIZE 10
+#define MEI_NFC_MAX_HCI_PAYLOAD 300
+#define MEI_NFC_MAX_READ (MEI_NFC_HEADER_SIZE + MEI_NFC_MAX_HCI_PAYLOAD)
+
+struct microread_mei_phy {
+ struct mei_cl_device *device;
+ struct nfc_hci_dev *hdev;
+
+ int powered;
+
+ int hard_fault; /*
+ * < 0 if hardware error occured (e.g. i2c err)
+ * and prevents normal operation.
+ */
+};
+
+#define MEI_DUMP_SKB_IN(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump(KERN_DEBUG, "mei in : ", DUMP_PREFIX_OFFSET, \
+ 16, 1, (skb)->data, (skb)->len, 0); \
+} while (0)
+
+#define MEI_DUMP_SKB_OUT(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump(KERN_DEBUG, "mei out: ", DUMP_PREFIX_OFFSET, \
+ 16, 1, (skb)->data, (skb)->len, 0); \
+} while (0)
+
+static int microread_mei_enable(void *phy_id)
+{
+ struct microread_mei_phy *phy = phy_id;
+
+ pr_info(DRIVER_DESC ": %s\n", __func__);
+
+ phy->powered = 1;
+
+ return 0;
+}
+
+static void microread_mei_disable(void *phy_id)
+{
+ struct microread_mei_phy *phy = phy_id;
+
+ pr_info(DRIVER_DESC ": %s\n", __func__);
+
+ phy->powered = 0;
+}
+
+/*
+ * Writing a frame must not return the number of written bytes.
+ * It must return either zero for success, or <0 for error.
+ * In addition, it must not alter the skb
+ */
+static int microread_mei_write(void *phy_id, struct sk_buff *skb)
+{
+ struct microread_mei_phy *phy = phy_id;
+ int r;
+
+ MEI_DUMP_SKB_OUT("mei frame sent", skb);
+
+ r = mei_cl_send(phy->device, skb->data, skb->len);
+ if (r > 0)
+ r = 0;
+
+ return r;
+}
+
+static void microread_event_cb(struct mei_cl_device *device, u32 events,
+ void *context)
+{
+ struct microread_mei_phy *phy = context;
+
+ if (phy->hard_fault != 0)
+ return;
+
+ if (events & BIT(MEI_CL_EVENT_RX)) {
+ struct sk_buff *skb;
+ int reply_size;
+
+ skb = alloc_skb(MEI_NFC_MAX_READ, GFP_KERNEL);
+ if (!skb)
+ return;
+
+ reply_size = mei_cl_recv(device, skb->data, MEI_NFC_MAX_READ);
+ if (reply_size < MEI_NFC_HEADER_SIZE) {
+ kfree(skb);
+ return;
+ }
+
+ skb_put(skb, reply_size);
+ skb_pull(skb, MEI_NFC_HEADER_SIZE);
+
+ MEI_DUMP_SKB_IN("mei frame read", skb);
+
+ nfc_hci_recv_frame(phy->hdev, skb);
+ }
+}
+
+static struct nfc_phy_ops mei_phy_ops = {
+ .write = microread_mei_write,
+ .enable = microread_mei_enable,
+ .disable = microread_mei_disable,
+};
+
+static int microread_mei_probe(struct mei_cl_device *device,
+ const struct mei_cl_device_id *id)
+{
+ struct microread_mei_phy *phy;
+ int r;
+
+ pr_info("Probing NFC microread\n");
+
+ phy = kzalloc(sizeof(struct microread_mei_phy), GFP_KERNEL);
+ if (!phy) {
+ pr_err("Cannot allocate memory for microread mei phy.\n");
+ return -ENOMEM;
+ }
+
+ phy->device = device;
+ mei_cl_set_drvdata(device, phy);
+
+ r = mei_cl_register_event_cb(device, microread_event_cb, phy);
+ if (r) {
+ pr_err(MICROREAD_DRIVER_NAME ": event cb registration failed\n");
+ goto err_out;
+ }
+
+ r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
+ MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
+ &phy->hdev);
+ if (r < 0)
+ goto err_out;
+
+ return 0;
+
+err_out:
+ kfree(phy);
+
+ return r;
+}
+
+static int microread_mei_remove(struct mei_cl_device *device)
+{
+ struct microread_mei_phy *phy = mei_cl_get_drvdata(device);
+
+ pr_info("Removing microread\n");
+
+ microread_remove(phy->hdev);
+
+ if (phy->powered)
+ microread_mei_disable(phy);
+
+ kfree(phy);
+
+ return 0;
+}
+
+static struct mei_cl_device_id microread_mei_tbl[] = {
+ { MICROREAD_DRIVER_NAME },
+
+ /* required last entry */
+ { }
+};
+MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
+
+static struct mei_cl_driver microread_driver = {
+ .id_table = microread_mei_tbl,
+ .name = MICROREAD_DRIVER_NAME,
+
+ .probe = microread_mei_probe,
+ .remove = microread_mei_remove,
+};
+
+static int microread_mei_init(void)
+{
+ int r;
+
+ pr_debug(DRIVER_DESC ": %s\n", __func__);
+
+ r = mei_cl_driver_register(µread_driver);
+ if (r) {
+ pr_err(MICROREAD_DRIVER_NAME ": driver registration failed\n");
+ return r;
+ }
+
+ return 0;
+}
+
+static void microread_mei_exit(void)
+{
+ mei_cl_driver_unregister(µread_driver);
+}
+
+module_init(microread_mei_init);
+module_exit(microread_mei_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
--- /dev/null
+/*
+ * HCI based Driver for Inside Secure microread NFC Chip
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/crc-ccitt.h>
+
+#include <linux/nfc.h>
+#include <net/nfc/nfc.h>
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "microread.h"
+
+/* Proprietary gates, events, commands and registers */
+/* Admin */
+#define MICROREAD_GATE_ID_ADM NFC_HCI_ADMIN_GATE
+#define MICROREAD_GATE_ID_MGT 0x01
+#define MICROREAD_GATE_ID_OS 0x02
+#define MICROREAD_GATE_ID_TESTRF 0x03
+#define MICROREAD_GATE_ID_LOOPBACK NFC_HCI_LOOPBACK_GATE
+#define MICROREAD_GATE_ID_IDT NFC_HCI_ID_MGMT_GATE
+#define MICROREAD_GATE_ID_LMS NFC_HCI_LINK_MGMT_GATE
+
+/* Reader */
+#define MICROREAD_GATE_ID_MREAD_GEN 0x10
+#define MICROREAD_GATE_ID_MREAD_ISO_B NFC_HCI_RF_READER_B_GATE
+#define MICROREAD_GATE_ID_MREAD_NFC_T1 0x12
+#define MICROREAD_GATE_ID_MREAD_ISO_A NFC_HCI_RF_READER_A_GATE
+#define MICROREAD_GATE_ID_MREAD_NFC_T3 0x14
+#define MICROREAD_GATE_ID_MREAD_ISO_15_3 0x15
+#define MICROREAD_GATE_ID_MREAD_ISO_15_2 0x16
+#define MICROREAD_GATE_ID_MREAD_ISO_B_3 0x17
+#define MICROREAD_GATE_ID_MREAD_BPRIME 0x18
+#define MICROREAD_GATE_ID_MREAD_ISO_A_3 0x19
+
+/* Card */
+#define MICROREAD_GATE_ID_MCARD_GEN 0x20
+#define MICROREAD_GATE_ID_MCARD_ISO_B 0x21
+#define MICROREAD_GATE_ID_MCARD_BPRIME 0x22
+#define MICROREAD_GATE_ID_MCARD_ISO_A 0x23
+#define MICROREAD_GATE_ID_MCARD_NFC_T3 0x24
+#define MICROREAD_GATE_ID_MCARD_ISO_15_3 0x25
+#define MICROREAD_GATE_ID_MCARD_ISO_15_2 0x26
+#define MICROREAD_GATE_ID_MCARD_ISO_B_2 0x27
+#define MICROREAD_GATE_ID_MCARD_ISO_CUSTOM 0x28
+#define MICROREAD_GATE_ID_SECURE_ELEMENT 0x2F
+
+/* P2P */
+#define MICROREAD_GATE_ID_P2P_GEN 0x30
+#define MICROREAD_GATE_ID_P2P_TARGET 0x31
+#define MICROREAD_PAR_P2P_TARGET_MODE 0x01
+#define MICROREAD_PAR_P2P_TARGET_GT 0x04
+#define MICROREAD_GATE_ID_P2P_INITIATOR 0x32
+#define MICROREAD_PAR_P2P_INITIATOR_GI 0x01
+#define MICROREAD_PAR_P2P_INITIATOR_GT 0x03
+
+/* Those pipes are created/opened by default in the chip */
+#define MICROREAD_PIPE_ID_LMS 0x00
+#define MICROREAD_PIPE_ID_ADMIN 0x01
+#define MICROREAD_PIPE_ID_MGT 0x02
+#define MICROREAD_PIPE_ID_OS 0x03
+#define MICROREAD_PIPE_ID_HDS_LOOPBACK 0x04
+#define MICROREAD_PIPE_ID_HDS_IDT 0x05
+#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_B 0x08
+#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_BPRIME 0x09
+#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_A 0x0A
+#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_15_3 0x0B
+#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_15_2 0x0C
+#define MICROREAD_PIPE_ID_HDS_MCARD_NFC_T3 0x0D
+#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_B_2 0x0E
+#define MICROREAD_PIPE_ID_HDS_MCARD_CUSTOM 0x0F
+#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_B 0x10
+#define MICROREAD_PIPE_ID_HDS_MREAD_NFC_T1 0x11
+#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_A 0x12
+#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_15_3 0x13
+#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_15_2 0x14
+#define MICROREAD_PIPE_ID_HDS_MREAD_NFC_T3 0x15
+#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_B_3 0x16
+#define MICROREAD_PIPE_ID_HDS_MREAD_BPRIME 0x17
+#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_A_3 0x18
+#define MICROREAD_PIPE_ID_HDS_MREAD_GEN 0x1B
+#define MICROREAD_PIPE_ID_HDS_STACKED_ELEMENT 0x1C
+#define MICROREAD_PIPE_ID_HDS_INSTANCES 0x1D
+#define MICROREAD_PIPE_ID_HDS_TESTRF 0x1E
+#define MICROREAD_PIPE_ID_HDS_P2P_TARGET 0x1F
+#define MICROREAD_PIPE_ID_HDS_P2P_INITIATOR 0x20
+
+/* Events */
+#define MICROREAD_EVT_MREAD_DISCOVERY_OCCURED NFC_HCI_EVT_TARGET_DISCOVERED
+#define MICROREAD_EVT_MREAD_CARD_FOUND 0x3D
+#define MICROREAD_EMCF_A_ATQA 0
+#define MICROREAD_EMCF_A_SAK 2
+#define MICROREAD_EMCF_A_LEN 3
+#define MICROREAD_EMCF_A_UID 4
+#define MICROREAD_EMCF_A3_ATQA 0
+#define MICROREAD_EMCF_A3_SAK 2
+#define MICROREAD_EMCF_A3_LEN 3
+#define MICROREAD_EMCF_A3_UID 4
+#define MICROREAD_EMCF_B_UID 0
+#define MICROREAD_EMCF_T1_ATQA 0
+#define MICROREAD_EMCF_T1_UID 4
+#define MICROREAD_EMCF_T3_UID 0
+#define MICROREAD_EVT_MREAD_DISCOVERY_START NFC_HCI_EVT_READER_REQUESTED
+#define MICROREAD_EVT_MREAD_DISCOVERY_START_SOME 0x3E
+#define MICROREAD_EVT_MREAD_DISCOVERY_STOP NFC_HCI_EVT_END_OPERATION
+#define MICROREAD_EVT_MREAD_SIM_REQUESTS 0x3F
+#define MICROREAD_EVT_MCARD_EXCHANGE NFC_HCI_EVT_TARGET_DISCOVERED
+#define MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF 0x20
+#define MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_FROM_RF 0x21
+#define MICROREAD_EVT_MCARD_FIELD_ON 0x11
+#define MICROREAD_EVT_P2P_TARGET_ACTIVATED 0x13
+#define MICROREAD_EVT_P2P_TARGET_DEACTIVATED 0x12
+#define MICROREAD_EVT_MCARD_FIELD_OFF 0x14
+
+/* Commands */
+#define MICROREAD_CMD_MREAD_EXCHANGE 0x10
+#define MICROREAD_CMD_MREAD_SUBSCRIBE 0x3F
+
+/* Hosts IDs */
+#define MICROREAD_ELT_ID_HDS NFC_HCI_TERMINAL_HOST_ID
+#define MICROREAD_ELT_ID_SIM NFC_HCI_UICC_HOST_ID
+#define MICROREAD_ELT_ID_SE1 0x03
+#define MICROREAD_ELT_ID_SE2 0x04
+#define MICROREAD_ELT_ID_SE3 0x05
+
+static struct nfc_hci_gate microread_gates[] = {
+ {MICROREAD_GATE_ID_ADM, MICROREAD_PIPE_ID_ADMIN},
+ {MICROREAD_GATE_ID_LOOPBACK, MICROREAD_PIPE_ID_HDS_LOOPBACK},
+ {MICROREAD_GATE_ID_IDT, MICROREAD_PIPE_ID_HDS_IDT},
+ {MICROREAD_GATE_ID_LMS, MICROREAD_PIPE_ID_LMS},
+ {MICROREAD_GATE_ID_MREAD_ISO_B, MICROREAD_PIPE_ID_HDS_MREAD_ISO_B},
+ {MICROREAD_GATE_ID_MREAD_ISO_A, MICROREAD_PIPE_ID_HDS_MREAD_ISO_A},
+ {MICROREAD_GATE_ID_MREAD_ISO_A_3, MICROREAD_PIPE_ID_HDS_MREAD_ISO_A_3},
+ {MICROREAD_GATE_ID_MGT, MICROREAD_PIPE_ID_MGT},
+ {MICROREAD_GATE_ID_OS, MICROREAD_PIPE_ID_OS},
+ {MICROREAD_GATE_ID_MREAD_NFC_T1, MICROREAD_PIPE_ID_HDS_MREAD_NFC_T1},
+ {MICROREAD_GATE_ID_MREAD_NFC_T3, MICROREAD_PIPE_ID_HDS_MREAD_NFC_T3},
+ {MICROREAD_GATE_ID_P2P_TARGET, MICROREAD_PIPE_ID_HDS_P2P_TARGET},
+ {MICROREAD_GATE_ID_P2P_INITIATOR, MICROREAD_PIPE_ID_HDS_P2P_INITIATOR}
+};
+
+/* Largest headroom needed for outgoing custom commands */
+#define MICROREAD_CMDS_HEADROOM 2
+#define MICROREAD_CMD_TAILROOM 2
+
+struct microread_info {
+ struct nfc_phy_ops *phy_ops;
+ void *phy_id;
+
+ struct nfc_hci_dev *hdev;
+
+ int async_cb_type;
+ data_exchange_cb_t async_cb;
+ void *async_cb_context;
+};
+
+static int microread_open(struct nfc_hci_dev *hdev)
+{
+ struct microread_info *info = nfc_hci_get_clientdata(hdev);
+
+ return info->phy_ops->enable(info->phy_id);
+}
+
+static void microread_close(struct nfc_hci_dev *hdev)
+{
+ struct microread_info *info = nfc_hci_get_clientdata(hdev);
+
+ info->phy_ops->disable(info->phy_id);
+}
+
+static int microread_hci_ready(struct nfc_hci_dev *hdev)
+{
+ int r;
+ u8 param[4];
+
+ param[0] = 0x03;
+ r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_A,
+ MICROREAD_CMD_MREAD_SUBSCRIBE, param, 1, NULL);
+ if (r)
+ return r;
+
+ r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_A_3,
+ MICROREAD_CMD_MREAD_SUBSCRIBE, NULL, 0, NULL);
+ if (r)
+ return r;
+
+ param[0] = 0x00;
+ param[1] = 0x03;
+ param[2] = 0x00;
+ r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_B,
+ MICROREAD_CMD_MREAD_SUBSCRIBE, param, 3, NULL);
+ if (r)
+ return r;
+
+ r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_NFC_T1,
+ MICROREAD_CMD_MREAD_SUBSCRIBE, NULL, 0, NULL);
+ if (r)
+ return r;
+
+ param[0] = 0xFF;
+ param[1] = 0xFF;
+ param[2] = 0x00;
+ param[3] = 0x00;
+ r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_NFC_T3,
+ MICROREAD_CMD_MREAD_SUBSCRIBE, param, 4, NULL);
+
+ return r;
+}
+
+static int microread_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+ struct microread_info *info = nfc_hci_get_clientdata(hdev);
+
+ return info->phy_ops->write(info->phy_id, skb);
+}
+
+static int microread_start_poll(struct nfc_hci_dev *hdev,
+ u32 im_protocols, u32 tm_protocols)
+{
+ int r;
+
+ u8 param[2];
+ u8 mode;
+
+ param[0] = 0x00;
+ param[1] = 0x00;
+
+ if (im_protocols & NFC_PROTO_ISO14443_MASK)
+ param[0] |= (1 << 2);
+
+ if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
+ param[0] |= 1;
+
+ if (im_protocols & NFC_PROTO_MIFARE_MASK)
+ param[1] |= 1;
+
+ if (im_protocols & NFC_PROTO_JEWEL_MASK)
+ param[0] |= (1 << 1);
+
+ if (im_protocols & NFC_PROTO_FELICA_MASK)
+ param[0] |= (1 << 5);
+
+ if (im_protocols & NFC_PROTO_NFC_DEP_MASK)
+ param[1] |= (1 << 1);
+
+ if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
+ hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
+ &hdev->gb_len);
+ if (hdev->gb == NULL || hdev->gb_len == 0) {
+ im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+ tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+ }
+ }
+
+ r = nfc_hci_send_event(hdev, MICROREAD_GATE_ID_MREAD_ISO_A,
+ MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, 0);
+ if (r)
+ return r;
+
+ mode = 0xff;
+ r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
+ MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1);
+ if (r)
+ return r;
+
+ if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_INITIATOR,
+ MICROREAD_PAR_P2P_INITIATOR_GI,
+ hdev->gb, hdev->gb_len);
+ if (r)
+ return r;
+ }
+
+ if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
+ MICROREAD_PAR_P2P_TARGET_GT,
+ hdev->gb, hdev->gb_len);
+ if (r)
+ return r;
+
+ mode = 0x02;
+ r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
+ MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1);
+ if (r)
+ return r;
+ }
+
+ return nfc_hci_send_event(hdev, MICROREAD_GATE_ID_MREAD_ISO_A,
+ MICROREAD_EVT_MREAD_DISCOVERY_START_SOME,
+ param, 2);
+}
+
+static int microread_dep_link_up(struct nfc_hci_dev *hdev,
+ struct nfc_target *target, u8 comm_mode,
+ u8 *gb, size_t gb_len)
+{
+ struct sk_buff *rgb_skb = NULL;
+ int r;
+
+ r = nfc_hci_get_param(hdev, target->hci_reader_gate,
+ MICROREAD_PAR_P2P_INITIATOR_GT, &rgb_skb);
+ if (r < 0)
+ return r;
+
+ if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
+ r = -EPROTO;
+ goto exit;
+ }
+
+ r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
+ rgb_skb->len);
+ if (r == 0)
+ r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
+ NFC_RF_INITIATOR);
+exit:
+ kfree_skb(rgb_skb);
+
+ return r;
+}
+
+static int microread_dep_link_down(struct nfc_hci_dev *hdev)
+{
+ return nfc_hci_send_event(hdev, MICROREAD_GATE_ID_P2P_INITIATOR,
+ MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, 0);
+}
+
+static int microread_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
+ struct nfc_target *target)
+{
+ switch (gate) {
+ case MICROREAD_GATE_ID_P2P_INITIATOR:
+ target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ break;
+ default:
+ return -EPROTO;
+ }
+
+ return 0;
+}
+
+static int microread_complete_target_discovered(struct nfc_hci_dev *hdev,
+ u8 gate,
+ struct nfc_target *target)
+{
+ return 0;
+}
+
+#define MICROREAD_CB_TYPE_READER_ALL 1
+
+static void microread_im_transceive_cb(void *context, struct sk_buff *skb,
+ int err)
+{
+ struct microread_info *info = context;
+
+ switch (info->async_cb_type) {
+ case MICROREAD_CB_TYPE_READER_ALL:
+ if (err == 0) {
+ if (skb->len == 0) {
+ err = -EPROTO;
+ kfree_skb(skb);
+ info->async_cb(info->async_cb_context, NULL,
+ -EPROTO);
+ return;
+ }
+
+ if (skb->data[skb->len - 1] != 0) {
+ err = nfc_hci_result_to_errno(
+ skb->data[skb->len - 1]);
+ kfree_skb(skb);
+ info->async_cb(info->async_cb_context, NULL,
+ err);
+ return;
+ }
+
+ skb_trim(skb, skb->len - 1); /* RF Error ind. */
+ }
+ info->async_cb(info->async_cb_context, skb, err);
+ break;
+ default:
+ if (err == 0)
+ kfree_skb(skb);
+ break;
+ }
+}
+
+/*
+ * Returns:
+ * <= 0: driver handled the data exchange
+ * 1: driver doesn't especially handle, please do standard processing
+ */
+static int microread_im_transceive(struct nfc_hci_dev *hdev,
+ struct nfc_target *target,
+ struct sk_buff *skb, data_exchange_cb_t cb,
+ void *cb_context)
+{
+ struct microread_info *info = nfc_hci_get_clientdata(hdev);
+ u8 control_bits;
+ u16 crc;
+
+ pr_info("data exchange to gate 0x%x\n", target->hci_reader_gate);
+
+ if (target->hci_reader_gate == MICROREAD_GATE_ID_P2P_INITIATOR) {
+ *skb_push(skb, 1) = 0;
+
+ return nfc_hci_send_event(hdev, target->hci_reader_gate,
+ MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF,
+ skb->data, skb->len);
+ }
+
+ switch (target->hci_reader_gate) {
+ case MICROREAD_GATE_ID_MREAD_ISO_A:
+ control_bits = 0xCB;
+ break;
+ case MICROREAD_GATE_ID_MREAD_ISO_A_3:
+ control_bits = 0xCB;
+ break;
+ case MICROREAD_GATE_ID_MREAD_ISO_B:
+ control_bits = 0xCB;
+ break;
+ case MICROREAD_GATE_ID_MREAD_NFC_T1:
+ control_bits = 0x1B;
+
+ crc = crc_ccitt(0xffff, skb->data, skb->len);
+ crc = ~crc;
+ *skb_put(skb, 1) = crc & 0xff;
+ *skb_put(skb, 1) = crc >> 8;
+ break;
+ case MICROREAD_GATE_ID_MREAD_NFC_T3:
+ control_bits = 0xDB;
+ break;
+ default:
+ pr_info("Abort im_transceive to invalid gate 0x%x\n",
+ target->hci_reader_gate);
+ return 1;
+ }
+
+ *skb_push(skb, 1) = control_bits;
+
+ info->async_cb_type = MICROREAD_CB_TYPE_READER_ALL;
+ info->async_cb = cb;
+ info->async_cb_context = cb_context;
+
+ return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+ MICROREAD_CMD_MREAD_EXCHANGE,
+ skb->data, skb->len,
+ microread_im_transceive_cb, info);
+}
+
+static int microread_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+ int r;
+
+ r = nfc_hci_send_event(hdev, MICROREAD_GATE_ID_P2P_TARGET,
+ MICROREAD_EVT_MCARD_EXCHANGE,
+ skb->data, skb->len);
+
+ kfree_skb(skb);
+
+ return r;
+}
+
+static void microread_target_discovered(struct nfc_hci_dev *hdev, u8 gate,
+ struct sk_buff *skb)
+{
+ struct nfc_target *targets;
+ int r = 0;
+
+ pr_info("target discovered to gate 0x%x\n", gate);
+
+ targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
+ if (targets == NULL) {
+ r = -ENOMEM;
+ goto exit;
+ }
+
+ targets->hci_reader_gate = gate;
+
+ switch (gate) {
+ case MICROREAD_GATE_ID_MREAD_ISO_A:
+ targets->supported_protocols =
+ nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A_SAK]);
+ targets->sens_res =
+ be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A_ATQA]);
+ targets->sel_res = skb->data[MICROREAD_EMCF_A_SAK];
+ memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A_UID],
+ skb->data[MICROREAD_EMCF_A_LEN]);
+ targets->nfcid1_len = skb->data[MICROREAD_EMCF_A_LEN];
+ break;
+ case MICROREAD_GATE_ID_MREAD_ISO_A_3:
+ targets->supported_protocols =
+ nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A3_SAK]);
+ targets->sens_res =
+ be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A3_ATQA]);
+ targets->sel_res = skb->data[MICROREAD_EMCF_A3_SAK];
+ memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A3_UID],
+ skb->data[MICROREAD_EMCF_A3_LEN]);
+ targets->nfcid1_len = skb->data[MICROREAD_EMCF_A3_LEN];
+ break;
+ case MICROREAD_GATE_ID_MREAD_ISO_B:
+ targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
+ memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_B_UID], 4);
+ targets->nfcid1_len = 4;
+ break;
+ case MICROREAD_GATE_ID_MREAD_NFC_T1:
+ targets->supported_protocols = NFC_PROTO_JEWEL_MASK;
+ targets->sens_res =
+ le16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_T1_ATQA]);
+ memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T1_UID], 4);
+ targets->nfcid1_len = 4;
+ break;
+ case MICROREAD_GATE_ID_MREAD_NFC_T3:
+ targets->supported_protocols = NFC_PROTO_FELICA_MASK;
+ memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T3_UID], 8);
+ targets->nfcid1_len = 8;
+ break;
+ default:
+ pr_info("discard target discovered to gate 0x%x\n", gate);
+ goto exit_free;
+ }
+
+ r = nfc_targets_found(hdev->ndev, targets, 1);
+
+exit_free:
+ kfree(targets);
+
+exit:
+ kfree_skb(skb);
+
+ if (r)
+ pr_err("Failed to handle discovered target err=%d", r);
+}
+
+static int microread_event_received(struct nfc_hci_dev *hdev, u8 gate,
+ u8 event, struct sk_buff *skb)
+{
+ int r;
+ u8 mode;
+
+ pr_info("Microread received event 0x%x to gate 0x%x\n", event, gate);
+
+ switch (event) {
+ case MICROREAD_EVT_MREAD_CARD_FOUND:
+ microread_target_discovered(hdev, gate, skb);
+ return 0;
+
+ case MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_FROM_RF:
+ if (skb->len < 1) {
+ kfree_skb(skb);
+ return -EPROTO;
+ }
+
+ if (skb->data[skb->len - 1]) {
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ skb_trim(skb, skb->len - 1);
+
+ r = nfc_tm_data_received(hdev->ndev, skb);
+ break;
+
+ case MICROREAD_EVT_MCARD_FIELD_ON:
+ case MICROREAD_EVT_MCARD_FIELD_OFF:
+ kfree_skb(skb);
+ return 0;
+
+ case MICROREAD_EVT_P2P_TARGET_ACTIVATED:
+ r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
+ NFC_COMM_PASSIVE, skb->data,
+ skb->len);
+
+ kfree_skb(skb);
+ break;
+
+ case MICROREAD_EVT_MCARD_EXCHANGE:
+ if (skb->len < 1) {
+ kfree_skb(skb);
+ return -EPROTO;
+ }
+
+ if (skb->data[skb->len-1]) {
+ kfree_skb(skb);
+ return -EIO;
+ }
+
+ skb_trim(skb, skb->len - 1);
+
+ r = nfc_tm_data_received(hdev->ndev, skb);
+ break;
+
+ case MICROREAD_EVT_P2P_TARGET_DEACTIVATED:
+ kfree_skb(skb);
+
+ mode = 0xff;
+ r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
+ MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1);
+ if (r)
+ break;
+
+ r = nfc_hci_send_event(hdev, gate,
+ MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL,
+ 0);
+ break;
+
+ default:
+ return 1;
+ }
+
+ return r;
+}
+
+static struct nfc_hci_ops microread_hci_ops = {
+ .open = microread_open,
+ .close = microread_close,
+ .hci_ready = microread_hci_ready,
+ .xmit = microread_xmit,
+ .start_poll = microread_start_poll,
+ .dep_link_up = microread_dep_link_up,
+ .dep_link_down = microread_dep_link_down,
+ .target_from_gate = microread_target_from_gate,
+ .complete_target_discovered = microread_complete_target_discovered,
+ .im_transceive = microread_im_transceive,
+ .tm_send = microread_tm_send,
+ .check_presence = NULL,
+ .event_received = microread_event_received,
+};
+
+int microread_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
+ int phy_headroom, int phy_tailroom, int phy_payload,
+ struct nfc_hci_dev **hdev)
+{
+ struct microread_info *info;
+ unsigned long quirks = 0;
+ u32 protocols, se;
+ struct nfc_hci_init_data init_data;
+ int r;
+
+ info = kzalloc(sizeof(struct microread_info), GFP_KERNEL);
+ if (!info) {
+ pr_err("Cannot allocate memory for microread_info.\n");
+ r = -ENOMEM;
+ goto err_info_alloc;
+ }
+
+ info->phy_ops = phy_ops;
+ info->phy_id = phy_id;
+
+ init_data.gate_count = ARRAY_SIZE(microread_gates);
+ memcpy(init_data.gates, microread_gates, sizeof(microread_gates));
+
+ strcpy(init_data.session_id, "MICROREA");
+
+ set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks);
+
+ protocols = NFC_PROTO_JEWEL_MASK |
+ NFC_PROTO_MIFARE_MASK |
+ NFC_PROTO_FELICA_MASK |
+ NFC_PROTO_ISO14443_MASK |
+ NFC_PROTO_ISO14443_B_MASK |
+ NFC_PROTO_NFC_DEP_MASK;
+
+ se = NFC_SE_UICC | NFC_SE_EMBEDDED;
+
+ info->hdev = nfc_hci_allocate_device(µread_hci_ops, &init_data,
+ quirks, protocols, se, llc_name,
+ phy_headroom +
+ MICROREAD_CMDS_HEADROOM,
+ phy_tailroom +
+ MICROREAD_CMD_TAILROOM,
+ phy_payload);
+ if (!info->hdev) {
+ pr_err("Cannot allocate nfc hdev.\n");
+ r = -ENOMEM;
+ goto err_alloc_hdev;
+ }
+
+ nfc_hci_set_clientdata(info->hdev, info);
+
+ r = nfc_hci_register_device(info->hdev);
+ if (r)
+ goto err_regdev;
+
+ *hdev = info->hdev;
+
+ return 0;
+
+err_regdev:
+ nfc_hci_free_device(info->hdev);
+
+err_alloc_hdev:
+ kfree(info);
+
+err_info_alloc:
+ return r;
+}
+EXPORT_SYMBOL(microread_probe);
+
+void microread_remove(struct nfc_hci_dev *hdev)
+{
+ struct microread_info *info = nfc_hci_get_clientdata(hdev);
+
+ nfc_hci_unregister_device(hdev);
+ nfc_hci_free_device(hdev);
+ kfree(info);
+}
+EXPORT_SYMBOL(microread_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
--- /dev/null
+/*
+ * Copyright (C) 2011 - 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __LOCAL_MICROREAD_H_
+#define __LOCAL_MICROREAD_H_
+
+#include <net/nfc/hci.h>
+
+#define DRIVER_DESC "NFC driver for microread"
+
+int microread_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
+ int phy_headroom, int phy_tailroom, int phy_payload,
+ struct nfc_hci_dev **hdev);
+
+void microread_remove(struct nfc_hci_dev *hdev);
+
+#endif /* __LOCAL_MICROREAD_H_ */
nfc_dev_dbg(&pdev->dev, "probe entry");
- drv = kzalloc(sizeof(struct nfcwilink), GFP_KERNEL);
+ drv = devm_kzalloc(&pdev->dev, sizeof(struct nfcwilink), GFP_KERNEL);
if (!drv) {
rc = -ENOMEM;
goto exit;
drv->ndev = nci_allocate_device(&nfcwilink_ops,
protocols,
+ NFC_SE_NONE,
NFCWILINK_HDR_LEN,
0);
if (!drv->ndev) {
nfc_dev_err(&pdev->dev, "nci_allocate_device failed");
rc = -ENOMEM;
- goto free_exit;
+ goto exit;
}
nci_set_parent_dev(drv->ndev, &pdev->dev);
free_dev_exit:
nci_free_device(drv->ndev);
-free_exit:
- kfree(drv);
-
exit:
return rc;
}
nci_unregister_device(ndev);
nci_free_device(ndev);
- kfree(drv);
-
dev_set_drvdata(&pdev->dev, NULL);
return 0;
#define SONY_VENDOR_ID 0x054c
#define PASORI_PRODUCT_ID 0x02e1
-#define PN533_QUIRKS_TYPE_A BIT(0)
-#define PN533_QUIRKS_TYPE_F BIT(1)
-#define PN533_QUIRKS_DEP BIT(2)
-#define PN533_QUIRKS_RAW_EXCHANGE BIT(3)
-
#define PN533_DEVICE_STD 0x1
#define PN533_DEVICE_PASORI 0x2
#define PN533_LISTEN_TIME 2
/* frame definitions */
-#define PN533_FRAME_TAIL_SIZE 2
-#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
- PN533_FRAME_TAIL_SIZE)
-#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
+#define PN533_FRAME_HEADER_LEN (sizeof(struct pn533_frame) \
+ + 2) /* data[0] TFI, data[1] CC */
+#define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
+
+/*
+ * Max extended frame payload len, excluding TFI and CC
+ * which are already in PN533_FRAME_HEADER_LEN.
+ */
+#define PN533_FRAME_MAX_PAYLOAD_LEN 263
+
+#define PN533_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
+ Postamble (1) */
#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
/* PN533 Commands */
#define PN533_FRAME_CMD(f) (f->data[1])
-#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
-#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
#define PN533_CMD_RF_CONFIGURATION 0x32
#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
#define PN533_CMD_TG_GET_DATA 0x86
#define PN533_CMD_TG_SET_DATA 0x8e
+#define PN533_CMD_UNDEF 0xff
#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
#define PN533_CMD_MI_MASK 0x40
#define PN533_CMD_RET_SUCCESS 0x00
-/* PN533 status codes */
-#define PN533_STATUS_TARGET_RELEASED 0x29
-
struct pn533;
-typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
- u8 *params, int params_len);
+typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, int status);
+
+typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
+ struct sk_buff *resp);
/* structs for pn533 commands */
/* PN533_CMD_IN_ATR */
-struct pn533_cmd_activate_param {
- u8 tg;
- u8 next;
-} __packed;
-
struct pn533_cmd_activate_response {
u8 status;
u8 nfcid3t[10];
u8 gt[];
} __packed;
-/* PN533_CMD_IN_JUMP_FOR_DEP */
-struct pn533_cmd_jump_dep {
- u8 active;
- u8 baud;
- u8 next;
- u8 data[];
-} __packed;
-
struct pn533_cmd_jump_dep_response {
u8 status;
u8 tg;
#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
#define PN533_INIT_TARGET_RESP_DEP 0x4
-struct pn533_cmd_init_target {
- u8 mode;
- u8 mifare[6];
- u8 felica[18];
- u8 nfcid3[10];
- u8 gb_len;
- u8 gb[];
-} __packed;
-
-struct pn533_cmd_init_target_response {
- u8 mode;
- u8 cmd[];
-} __packed;
-
struct pn533 {
struct usb_device *udev;
struct usb_interface *interface;
struct nfc_dev *nfc_dev;
struct urb *out_urb;
- int out_maxlen;
- struct pn533_frame *out_frame;
-
struct urb *in_urb;
- int in_maxlen;
- struct pn533_frame *in_frame;
struct sk_buff_head resp_q;
struct work_struct mi_work;
struct work_struct tg_work;
struct timer_list listen_timer;
- struct pn533_frame *wq_in_frame;
int wq_in_error;
int cancel_listen;
pn533_cmd_complete_t cmd_complete;
void *cmd_complete_arg;
+ void *cmd_complete_mi_arg;
struct mutex cmd_lock;
u8 cmd;
struct list_head cmd_queue;
u8 cmd_pending;
+
+ struct pn533_frame_ops *ops;
};
struct pn533_cmd {
struct list_head queue;
- struct pn533_frame *out_frame;
- struct pn533_frame *in_frame;
- int in_frame_len;
- pn533_cmd_complete_t cmd_complete;
+ u8 cmd_code;
+ struct sk_buff *req;
+ struct sk_buff *resp;
+ int resp_len;
void *arg;
- gfp_t flags;
};
struct pn533_frame {
u8 data[];
} __packed;
+struct pn533_frame_ops {
+ void (*tx_frame_init)(void *frame, u8 cmd_code);
+ void (*tx_frame_finish)(void *frame);
+ void (*tx_update_payload_len)(void *frame, int len);
+ int tx_header_len;
+ int tx_tail_len;
+
+ bool (*rx_is_frame_valid)(void *frame);
+ int (*rx_frame_size)(void *frame);
+ int rx_header_len;
+ int rx_tail_len;
+
+ int max_payload_len;
+ u8 (*get_cmd_code)(void *frame);
+};
+
/* The rule: value + checksum = 0 */
static inline u8 pn533_checksum(u8 value)
{
return pn533_checksum(sum);
}
-/**
- * pn533_tx_frame_ack - create a ack frame
- * @frame: The frame to be set as ack
- *
- * Ack is different type of standard frame. As a standard frame, it has
- * preamble and start_frame. However the checksum of this frame must fail,
- * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
- * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
- * After datalen_checksum field, the postamble is placed.
- */
-static void pn533_tx_frame_ack(struct pn533_frame *frame)
+static void pn533_tx_frame_init(void *_frame, u8 cmd_code)
{
- frame->preamble = 0;
- frame->start_frame = cpu_to_be16(PN533_SOF);
- frame->datalen = 0;
- frame->datalen_checksum = 0xFF;
- /* data[0] is used as postamble */
- frame->data[0] = 0;
-}
+ struct pn533_frame *frame = _frame;
-static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
-{
frame->preamble = 0;
frame->start_frame = cpu_to_be16(PN533_SOF);
PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
- PN533_FRAME_CMD(frame) = cmd;
+ PN533_FRAME_CMD(frame) = cmd_code;
frame->datalen = 2;
}
-static void pn533_tx_frame_finish(struct pn533_frame *frame)
+static void pn533_tx_frame_finish(void *_frame)
{
+ struct pn533_frame *frame = _frame;
+
frame->datalen_checksum = pn533_checksum(frame->datalen);
PN533_FRAME_CHECKSUM(frame) =
PN533_FRAME_POSTAMBLE(frame) = 0;
}
-static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
+static void pn533_tx_update_payload_len(void *_frame, int len)
+{
+ struct pn533_frame *frame = _frame;
+
+ frame->datalen += len;
+}
+
+static bool pn533_rx_frame_is_valid(void *_frame)
{
u8 checksum;
+ struct pn533_frame *frame = _frame;
if (frame->start_frame != cpu_to_be16(PN533_SOF))
return false;
return true;
}
-static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
+static inline int pn533_rx_frame_size(void *frame)
+{
+ struct pn533_frame *f = frame;
+
+ return sizeof(struct pn533_frame) + f->datalen + PN533_FRAME_TAIL_LEN;
+}
+
+static u8 pn533_get_cmd_code(void *frame)
+{
+ struct pn533_frame *f = frame;
+
+ return PN533_FRAME_CMD(f);
+}
+
+struct pn533_frame_ops pn533_std_frame_ops = {
+ .tx_frame_init = pn533_tx_frame_init,
+ .tx_frame_finish = pn533_tx_frame_finish,
+ .tx_update_payload_len = pn533_tx_update_payload_len,
+ .tx_header_len = PN533_FRAME_HEADER_LEN,
+ .tx_tail_len = PN533_FRAME_TAIL_LEN,
+
+ .rx_is_frame_valid = pn533_rx_frame_is_valid,
+ .rx_frame_size = pn533_rx_frame_size,
+ .rx_header_len = PN533_FRAME_HEADER_LEN,
+ .rx_tail_len = PN533_FRAME_TAIL_LEN,
+
+ .max_payload_len = PN533_FRAME_MAX_PAYLOAD_LEN,
+ .get_cmd_code = pn533_get_cmd_code,
+};
+
+static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
{
- return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
+ return (dev->ops->get_cmd_code(frame) == PN533_CMD_RESPONSE(dev->cmd));
}
static void pn533_wq_cmd_complete(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
- struct pn533_frame *in_frame;
int rc;
- in_frame = dev->wq_in_frame;
-
- if (dev->wq_in_error)
- rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
- dev->wq_in_error);
- else
- rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
- PN533_FRAME_CMD_PARAMS_PTR(in_frame),
- PN533_FRAME_CMD_PARAMS_LEN(in_frame));
-
+ rc = dev->cmd_complete(dev, dev->cmd_complete_arg, dev->wq_in_error);
if (rc != -EINPROGRESS)
queue_work(dev->wq, &dev->cmd_work);
}
static void pn533_recv_response(struct urb *urb)
{
struct pn533 *dev = urb->context;
- struct pn533_frame *in_frame;
-
- dev->wq_in_frame = NULL;
+ u8 *in_frame;
switch (urb->status) {
case 0:
- /* success */
- break;
+ break; /* success */
case -ECONNRESET:
case -ENOENT:
- case -ESHUTDOWN:
- nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
- " status: %d", urb->status);
+ nfc_dev_dbg(&dev->interface->dev,
+ "The urb has been canceled (status %d)",
+ urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
+ break;
+ case -ESHUTDOWN:
default:
- nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
- " %d", urb->status);
+ nfc_dev_err(&dev->interface->dev,
+ "Urb failure (status %d)", urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
}
in_frame = dev->in_urb->transfer_buffer;
- if (!pn533_rx_frame_is_valid(in_frame)) {
+ nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
+ print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
+ dev->ops->rx_frame_size(in_frame), false);
+
+ if (!dev->ops->rx_is_frame_valid(in_frame)) {
nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
dev->wq_in_error = -EIO;
goto sched_wq;
}
- if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
- nfc_dev_err(&dev->interface->dev, "The received frame is not "
- "response to the last command");
+ if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
+ nfc_dev_err(&dev->interface->dev,
+ "It it not the response to the last command");
dev->wq_in_error = -EIO;
goto sched_wq;
}
- nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
dev->wq_in_error = 0;
- dev->wq_in_frame = in_frame;
sched_wq:
queue_work(dev->wq, &dev->cmd_complete_work);
switch (urb->status) {
case 0:
- /* success */
- break;
+ break; /* success */
case -ECONNRESET:
case -ENOENT:
- case -ESHUTDOWN:
- nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
- " status: %d", urb->status);
+ nfc_dev_dbg(&dev->interface->dev,
+ "The urb has been stopped (status %d)",
+ urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
+ break;
+ case -ESHUTDOWN:
default:
- nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
- " %d", urb->status);
+ nfc_dev_err(&dev->interface->dev,
+ "Urb failure (status %d)", urb->status);
dev->wq_in_error = urb->status;
goto sched_wq;
}
goto sched_wq;
}
- nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
-
rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
if (rc) {
- nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
- " result %d", rc);
+ nfc_dev_err(&dev->interface->dev,
+ "usb_submit_urb failed with result %d", rc);
dev->wq_in_error = rc;
goto sched_wq;
}
return;
sched_wq:
- dev->wq_in_frame = NULL;
queue_work(dev->wq, &dev->cmd_complete_work);
}
static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
{
+ u8 ack[PN533_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
+ /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- pn533_tx_frame_ack(dev->out_frame);
-
- dev->out_urb->transfer_buffer = dev->out_frame;
- dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
+ dev->out_urb->transfer_buffer = ack;
+ dev->out_urb->transfer_buffer_length = sizeof(ack);
rc = usb_submit_urb(dev->out_urb, flags);
return rc;
}
-static int __pn533_send_cmd_frame_async(struct pn533 *dev,
- struct pn533_frame *out_frame,
- struct pn533_frame *in_frame,
- int in_frame_len,
+static int __pn533_send_frame_async(struct pn533 *dev,
+ struct sk_buff *out,
+ struct sk_buff *in,
+ int in_len,
pn533_cmd_complete_t cmd_complete,
- void *arg, gfp_t flags)
+ void *arg)
{
int rc;
- nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
- PN533_FRAME_CMD(out_frame));
-
- dev->cmd = PN533_FRAME_CMD(out_frame);
+ dev->cmd = dev->ops->get_cmd_code(out->data);
dev->cmd_complete = cmd_complete;
dev->cmd_complete_arg = arg;
- dev->out_urb->transfer_buffer = out_frame;
- dev->out_urb->transfer_buffer_length =
- PN533_FRAME_SIZE(out_frame);
+ dev->out_urb->transfer_buffer = out->data;
+ dev->out_urb->transfer_buffer_length = out->len;
- dev->in_urb->transfer_buffer = in_frame;
- dev->in_urb->transfer_buffer_length = in_frame_len;
+ dev->in_urb->transfer_buffer = in->data;
+ dev->in_urb->transfer_buffer_length = in_len;
- rc = usb_submit_urb(dev->out_urb, flags);
+ print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
+ out->data, out->len, false);
+
+ rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
if (rc)
return rc;
- rc = pn533_submit_urb_for_ack(dev, flags);
+ rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
if (rc)
goto error;
return rc;
}
-static void pn533_wq_cmd(struct work_struct *work)
+static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
+ struct sk_buff *skb)
{
- struct pn533 *dev = container_of(work, struct pn533, cmd_work);
- struct pn533_cmd *cmd;
+ /* payload is already there, just update datalen */
+ int payload_len = skb->len;
+ struct pn533_frame_ops *ops = dev->ops;
- mutex_lock(&dev->cmd_lock);
- if (list_empty(&dev->cmd_queue)) {
- dev->cmd_pending = 0;
- mutex_unlock(&dev->cmd_lock);
- return;
- }
+ skb_push(skb, ops->tx_header_len);
+ skb_put(skb, ops->tx_tail_len);
- cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
+ ops->tx_frame_init(skb->data, cmd_code);
+ ops->tx_update_payload_len(skb->data, payload_len);
+ ops->tx_frame_finish(skb->data);
+}
- mutex_unlock(&dev->cmd_lock);
+struct pn533_send_async_complete_arg {
+ pn533_send_async_complete_t complete_cb;
+ void *complete_cb_context;
+ struct sk_buff *resp;
+ struct sk_buff *req;
+};
- __pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
- cmd->in_frame_len, cmd->cmd_complete,
- cmd->arg, cmd->flags);
+static int pn533_send_async_complete(struct pn533 *dev, void *_arg, int status)
+{
+ struct pn533_send_async_complete_arg *arg = _arg;
- list_del(&cmd->queue);
- kfree(cmd);
+ struct sk_buff *req = arg->req;
+ struct sk_buff *resp = arg->resp;
+
+ int rc;
+
+ dev_kfree_skb(req);
+
+ if (status < 0) {
+ arg->complete_cb(dev, arg->complete_cb_context,
+ ERR_PTR(status));
+ dev_kfree_skb(resp);
+ kfree(arg);
+ return status;
+ }
+
+ skb_put(resp, dev->ops->rx_frame_size(resp->data));
+ skb_pull(resp, dev->ops->rx_header_len);
+ skb_trim(resp, resp->len - dev->ops->rx_tail_len);
+
+ rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
+
+ kfree(arg);
+ return rc;
}
-static int pn533_send_cmd_frame_async(struct pn533 *dev,
- struct pn533_frame *out_frame,
- struct pn533_frame *in_frame,
- int in_frame_len,
- pn533_cmd_complete_t cmd_complete,
- void *arg, gfp_t flags)
+static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
+ struct sk_buff *req, struct sk_buff *resp,
+ int resp_len,
+ pn533_send_async_complete_t complete_cb,
+ void *complete_cb_context)
{
struct pn533_cmd *cmd;
+ struct pn533_send_async_complete_arg *arg;
int rc = 0;
- nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+ nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
+
+ arg = kzalloc(sizeof(*arg), GFP_KERNEL);
+ if (!arg)
+ return -ENOMEM;
+
+ arg->complete_cb = complete_cb;
+ arg->complete_cb_context = complete_cb_context;
+ arg->resp = resp;
+ arg->req = req;
+
+ pn533_build_cmd_frame(dev, cmd_code, req);
mutex_lock(&dev->cmd_lock);
if (!dev->cmd_pending) {
- rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
- in_frame_len, cmd_complete,
- arg, flags);
- if (!rc)
- dev->cmd_pending = 1;
+ rc = __pn533_send_frame_async(dev, req, resp, resp_len,
+ pn533_send_async_complete, arg);
+ if (rc)
+ goto error;
+ dev->cmd_pending = 1;
goto unlock;
}
- nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
+ nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
+ cmd_code);
- cmd = kzalloc(sizeof(struct pn533_cmd), flags);
+ cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
if (!cmd) {
rc = -ENOMEM;
- goto unlock;
+ goto error;
}
INIT_LIST_HEAD(&cmd->queue);
- cmd->out_frame = out_frame;
- cmd->in_frame = in_frame;
- cmd->in_frame_len = in_frame_len;
- cmd->cmd_complete = cmd_complete;
+ cmd->cmd_code = cmd_code;
+ cmd->req = req;
+ cmd->resp = resp;
+ cmd->resp_len = resp_len;
cmd->arg = arg;
- cmd->flags = flags;
list_add_tail(&cmd->queue, &dev->cmd_queue);
+ goto unlock;
+
+error:
+ kfree(arg);
unlock:
mutex_unlock(&dev->cmd_lock);
+ return rc;
+}
+
+static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
+ struct sk_buff *req,
+ pn533_send_async_complete_t complete_cb,
+ void *complete_cb_context)
+{
+ struct sk_buff *resp;
+ int rc;
+ int resp_len = dev->ops->rx_header_len +
+ dev->ops->max_payload_len +
+ dev->ops->rx_tail_len;
+
+ resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
+ if (!resp)
+ return -ENOMEM;
+
+ rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
+ complete_cb_context);
+ if (rc)
+ dev_kfree_skb(resp);
return rc;
}
-struct pn533_sync_cmd_response {
+static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
+ struct sk_buff *req,
+ pn533_send_async_complete_t complete_cb,
+ void *complete_cb_context)
+{
+ struct sk_buff *resp;
int rc;
- struct completion done;
-};
+ int resp_len = dev->ops->rx_header_len +
+ dev->ops->max_payload_len +
+ dev->ops->rx_tail_len;
+
+ resp = alloc_skb(resp_len, GFP_KERNEL);
+ if (!resp)
+ return -ENOMEM;
+
+ rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
+ complete_cb_context);
+ if (rc)
+ dev_kfree_skb(resp);
-static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
- u8 *params, int params_len)
+ return rc;
+}
+
+/*
+ * pn533_send_cmd_direct_async
+ *
+ * The function sends a piority cmd directly to the chip omiting the cmd
+ * queue. It's intended to be used by chaining mechanism of received responses
+ * where the host has to request every single chunk of data before scheduling
+ * next cmd from the queue.
+ */
+static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
+ struct sk_buff *req,
+ pn533_send_async_complete_t complete_cb,
+ void *complete_cb_context)
{
- struct pn533_sync_cmd_response *arg = _arg;
+ struct pn533_send_async_complete_arg *arg;
+ struct sk_buff *resp;
+ int rc;
+ int resp_len = dev->ops->rx_header_len +
+ dev->ops->max_payload_len +
+ dev->ops->rx_tail_len;
- nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+ resp = alloc_skb(resp_len, GFP_KERNEL);
+ if (!resp)
+ return -ENOMEM;
+
+ arg = kzalloc(sizeof(*arg), GFP_KERNEL);
+ if (!arg) {
+ dev_kfree_skb(resp);
+ return -ENOMEM;
+ }
- arg->rc = 0;
+ arg->complete_cb = complete_cb;
+ arg->complete_cb_context = complete_cb_context;
+ arg->resp = resp;
+ arg->req = req;
- if (params_len < 0) /* error */
- arg->rc = params_len;
+ pn533_build_cmd_frame(dev, cmd_code, req);
+ rc = __pn533_send_frame_async(dev, req, resp, resp_len,
+ pn533_send_async_complete, arg);
+ if (rc < 0) {
+ dev_kfree_skb(resp);
+ kfree(arg);
+ }
+
+ return rc;
+}
+
+static void pn533_wq_cmd(struct work_struct *work)
+{
+ struct pn533 *dev = container_of(work, struct pn533, cmd_work);
+ struct pn533_cmd *cmd;
+
+ mutex_lock(&dev->cmd_lock);
+
+ if (list_empty(&dev->cmd_queue)) {
+ dev->cmd_pending = 0;
+ mutex_unlock(&dev->cmd_lock);
+ return;
+ }
+
+ cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
+
+ list_del(&cmd->queue);
+
+ mutex_unlock(&dev->cmd_lock);
+
+ __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len,
+ pn533_send_async_complete, cmd->arg);
+
+ kfree(cmd);
+}
+
+struct pn533_sync_cmd_response {
+ struct sk_buff *resp;
+ struct completion done;
+};
+
+static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
+ struct sk_buff *resp)
+{
+ struct pn533_sync_cmd_response *arg = _arg;
+
+ arg->resp = resp;
complete(&arg->done);
return 0;
}
-static int pn533_send_cmd_frame_sync(struct pn533 *dev,
- struct pn533_frame *out_frame,
- struct pn533_frame *in_frame,
- int in_frame_len)
+/* pn533_send_cmd_sync
+ *
+ * Please note the req parameter is freed inside the function to
+ * limit a number of return value interpretations by the caller.
+ *
+ * 1. negative in case of error during TX path -> req should be freed
+ *
+ * 2. negative in case of error during RX path -> req should not be freed
+ * as it's been already freed at the begining of RX path by
+ * async_complete_cb.
+ *
+ * 3. valid pointer in case of succesfult RX path
+ *
+ * A caller has to check a return value with IS_ERR macro. If the test pass,
+ * the returned pointer is valid.
+ *
+ * */
+static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
+ struct sk_buff *req)
{
int rc;
struct pn533_sync_cmd_response arg;
- nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
-
init_completion(&arg.done);
- rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
- pn533_sync_cmd_complete, &arg, GFP_KERNEL);
- if (rc)
- return rc;
+ rc = pn533_send_cmd_async(dev, cmd_code, req,
+ pn533_send_sync_complete, &arg);
+ if (rc) {
+ dev_kfree_skb(req);
+ return ERR_PTR(rc);
+ }
wait_for_completion(&arg.done);
- return arg.rc;
+ return arg.resp;
}
static void pn533_send_complete(struct urb *urb)
{
struct pn533 *dev = urb->context;
- nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
-
switch (urb->status) {
case 0:
- /* success */
- break;
+ break; /* success */
case -ECONNRESET:
case -ENOENT:
- case -ESHUTDOWN:
- nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
- " status: %d", urb->status);
+ nfc_dev_dbg(&dev->interface->dev,
+ "The urb has been stopped (status %d)",
+ urb->status);
break;
+ case -ESHUTDOWN:
default:
- nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
- " %d", urb->status);
+ nfc_dev_err(&dev->interface->dev,
+ "Urb failure (status %d)", urb->status);
}
}
+static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
+{
+ struct sk_buff *skb;
+
+ skb = alloc_skb(dev->ops->tx_header_len +
+ size +
+ dev->ops->tx_tail_len, GFP_KERNEL);
+
+ if (skb)
+ skb_reserve(skb, dev->ops->tx_header_len);
+
+ return skb;
+}
+
struct pn533_target_type_a {
__be16 sens_res;
u8 sel_res;
platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
- platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
- (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
- platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
+ platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
+ (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+ platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
return false;
/* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
{
struct pn533_target_type_a *tgt_type_a;
- tgt_type_a = (struct pn533_target_type_a *) tgt_data;
+ tgt_type_a = (struct pn533_target_type_a *)tgt_data;
if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
return -EPROTO;
{
struct pn533_target_felica *tgt_felica;
- tgt_felica = (struct pn533_target_felica *) tgt_data;
+ tgt_felica = (struct pn533_target_felica *)tgt_data;
if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
return -EPROTO;
- if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
- tgt_felica->nfcid2[1] ==
- PN533_FELICA_SENSF_NFCID2_DEP_B2)
+ if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
+ (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
else
nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
- platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
- (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
- platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
+ platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
+ (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+ platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
return false;
return true;
{
struct pn533_target_jewel *tgt_jewel;
- tgt_jewel = (struct pn533_target_jewel *) tgt_data;
+ tgt_jewel = (struct pn533_target_jewel *)tgt_data;
if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
return -EPROTO;
{
struct pn533_target_type_b *tgt_type_b;
- tgt_type_b = (struct pn533_target_type_b *) tgt_data;
+ tgt_type_b = (struct pn533_target_type_b *)tgt_data;
if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
return -EPROTO;
return 0;
}
-struct pn533_poll_response {
- u8 nbtg;
- u8 tg;
- u8 target_data[];
-} __packed;
-
-static int pn533_target_found(struct pn533 *dev,
- struct pn533_poll_response *resp, int resp_len)
+static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
+ int tgdata_len)
{
- int target_data_len;
struct nfc_target nfc_tgt;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
- dev->poll_mod_curr);
+ dev->poll_mod_curr);
- if (resp->tg != 1)
+ if (tg != 1)
return -EPROTO;
memset(&nfc_tgt, 0, sizeof(struct nfc_target));
- target_data_len = resp_len - sizeof(struct pn533_poll_response);
-
switch (dev->poll_mod_curr) {
case PN533_POLL_MOD_106KBPS_A:
- rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
- target_data_len);
+ rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
break;
case PN533_POLL_MOD_212KBPS_FELICA:
case PN533_POLL_MOD_424KBPS_FELICA:
- rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
- target_data_len);
+ rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
break;
case PN533_POLL_MOD_106KBPS_JEWEL:
- rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
- target_data_len);
+ rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
break;
case PN533_POLL_MOD_847KBPS_B:
- rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
- target_data_len);
+ rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
break;
default:
- nfc_dev_err(&dev->interface->dev, "Unknown current poll"
- " modulation");
+ nfc_dev_err(&dev->interface->dev,
+ "Unknown current poll modulation");
return -EPROTO;
}
return rc;
if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
- nfc_dev_dbg(&dev->interface->dev, "The target found does not"
- " have the desired protocol");
+ nfc_dev_dbg(&dev->interface->dev,
+ "The Tg found doesn't have the desired protocol");
return -EAGAIN;
}
- nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
- "0x%x", nfc_tgt.supported_protocols);
+ nfc_dev_dbg(&dev->interface->dev,
+ "Target found - supported protocols: 0x%x",
+ nfc_tgt.supported_protocols);
dev->tgt_available_prots = nfc_tgt.supported_protocols;
static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
{
dev->poll_mod_active[dev->poll_mod_count] =
- (struct pn533_poll_modulations *) &poll_mod[mod_index];
+ (struct pn533_poll_modulations *)&poll_mod[mod_index];
dev->poll_mod_count++;
}
{
pn533_poll_reset_mod_list(dev);
- if (im_protocols & NFC_PROTO_MIFARE_MASK
- || im_protocols & NFC_PROTO_ISO14443_MASK
- || im_protocols & NFC_PROTO_NFC_DEP_MASK)
+ if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
+ (im_protocols & NFC_PROTO_ISO14443_MASK) ||
+ (im_protocols & NFC_PROTO_NFC_DEP_MASK))
pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
- if (im_protocols & NFC_PROTO_FELICA_MASK
- || im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ if (im_protocols & NFC_PROTO_FELICA_MASK ||
+ im_protocols & NFC_PROTO_NFC_DEP_MASK) {
pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
}
pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
}
-static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
- u8 *params, int params_len)
+static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
{
- struct pn533_poll_response *resp;
- int rc;
+ u8 nbtg, tg, *tgdata;
+ int rc, tgdata_len;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- resp = (struct pn533_poll_response *) params;
- if (resp->nbtg) {
- rc = pn533_target_found(dev, resp, params_len);
+ nbtg = resp->data[0];
+ tg = resp->data[1];
+ tgdata = &resp->data[2];
+ tgdata_len = resp->len - 2; /* nbtg + tg */
+
+ if (nbtg) {
+ rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
/* We must stop the poll after a valid target found */
if (rc == 0) {
return -EAGAIN;
}
-static int pn533_init_target_frame(struct pn533_frame *frame,
- u8 *gb, size_t gb_len)
+static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
{
- struct pn533_cmd_init_target *cmd;
- size_t cmd_len;
+ struct sk_buff *skb;
+ u8 *felica, *nfcid3, *gb;
+
+ u8 *gbytes = dev->gb;
+ size_t gbytes_len = dev->gb_len;
+
u8 felica_params[18] = {0x1, 0xfe, /* DEP */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0xff, 0xff}; /* System code */
+
u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
0x0, 0x0, 0x0,
0x40}; /* SEL_RES for DEP */
- cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
- cmd = kzalloc(cmd_len, GFP_KERNEL);
- if (cmd == NULL)
- return -ENOMEM;
+ unsigned int skb_len = 36 + /* mode (1), mifare (6),
+ felica (18), nfcid3 (10), gb_len (1) */
+ gbytes_len +
+ 1; /* len Tk*/
- pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
+ skb = pn533_alloc_skb(dev, skb_len);
+ if (!skb)
+ return NULL;
/* DEP support only */
- cmd->mode |= PN533_INIT_TARGET_DEP;
+ *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
+
+ /* MIFARE params */
+ memcpy(skb_put(skb, 6), mifare_params, 6);
/* Felica params */
- memcpy(cmd->felica, felica_params, 18);
- get_random_bytes(cmd->felica + 2, 6);
+ felica = skb_put(skb, 18);
+ memcpy(felica, felica_params, 18);
+ get_random_bytes(felica + 2, 6);
/* NFCID3 */
- memset(cmd->nfcid3, 0, 10);
- memcpy(cmd->nfcid3, cmd->felica, 8);
-
- /* MIFARE params */
- memcpy(cmd->mifare, mifare_params, 6);
+ nfcid3 = skb_put(skb, 10);
+ memset(nfcid3, 0, 10);
+ memcpy(nfcid3, felica, 8);
/* General bytes */
- cmd->gb_len = gb_len;
- memcpy(cmd->gb, gb, gb_len);
-
- /* Len Tk */
- cmd->gb[gb_len] = 0;
-
- memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
+ *skb_put(skb, 1) = gbytes_len;
- frame->datalen += cmd_len;
+ gb = skb_put(skb, gbytes_len);
+ memcpy(gb, gbytes, gbytes_len);
- pn533_tx_frame_finish(frame);
-
- kfree(cmd);
+ /* Len Tk */
+ *skb_put(skb, 1) = 0;
- return 0;
+ return skb;
}
-#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
+#define PN533_CMD_DATAEXCH_HEAD_LEN 1
#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
- u8 *params, int params_len)
+ struct sk_buff *resp)
{
- struct sk_buff *skb_resp = arg;
- struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
+ u8 status;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- if (params_len < 0) {
- nfc_dev_err(&dev->interface->dev,
- "Error %d when starting as a target",
- params_len);
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
- return params_len;
- }
+ status = resp->data[0];
+ skb_pull(resp, sizeof(status));
- if (params_len > 0 && params[0] != 0) {
+ if (status != 0) {
nfc_tm_deactivated(dev->nfc_dev);
-
dev->tgt_mode = 0;
-
- kfree_skb(skb_resp);
+ dev_kfree_skb(resp);
return 0;
}
- skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
- skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
- skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
-
- return nfc_tm_data_received(dev->nfc_dev, skb_resp);
+ return nfc_tm_data_received(dev->nfc_dev, resp);
}
static void pn533_wq_tg_get_data(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, tg_work);
- struct pn533_frame *in_frame;
- struct sk_buff *skb_resp;
- size_t skb_resp_len;
- nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+ struct sk_buff *skb;
+ int rc;
- skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
- PN533_CMD_DATAEXCH_DATA_MAXLEN +
- PN533_FRAME_TAIL_SIZE;
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
- if (!skb_resp)
+ skb = pn533_alloc_skb(dev, 0);
+ if (!skb)
return;
- in_frame = (struct pn533_frame *)skb_resp->data;
+ rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
+ pn533_tm_get_data_complete, NULL);
- pn533_tx_frame_init(dev->out_frame, PN533_CMD_TG_GET_DATA);
- pn533_tx_frame_finish(dev->out_frame);
-
- pn533_send_cmd_frame_async(dev, dev->out_frame, in_frame,
- skb_resp_len,
- pn533_tm_get_data_complete,
- skb_resp, GFP_KERNEL);
+ if (rc < 0)
+ dev_kfree_skb(skb);
return;
}
#define ATR_REQ_GB_OFFSET 17
-static int pn533_init_target_complete(struct pn533 *dev, void *arg,
- u8 *params, int params_len)
+static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
{
- struct pn533_cmd_init_target_response *resp;
- u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
+ u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
size_t gb_len;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- if (params_len < 0) {
- nfc_dev_err(&dev->interface->dev,
- "Error %d when starting as a target",
- params_len);
-
- return params_len;
- }
-
- if (params_len < ATR_REQ_GB_OFFSET + 1)
+ if (resp->len < ATR_REQ_GB_OFFSET + 1)
return -EINVAL;
- resp = (struct pn533_cmd_init_target_response *) params;
+ mode = resp->data[0];
+ cmd = &resp->data[1];
- nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
- resp->mode, params_len);
+ nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
+ mode, resp->len);
- frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
- if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
+ if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
+ PN533_INIT_TARGET_RESP_ACTIVE)
comm_mode = NFC_COMM_ACTIVE;
- /* Again, only DEP */
- if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
+ if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
return -EOPNOTSUPP;
- gb = resp->cmd + ATR_REQ_GB_OFFSET;
- gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
+ gb = cmd + ATR_REQ_GB_OFFSET;
+ gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
comm_mode, gb, gb_len);
}
dev->tgt_mode = 1;
-
queue_work(dev->wq, &dev->tg_work);
return 0;
static void pn533_listen_mode_timer(unsigned long data)
{
- struct pn533 *dev = (struct pn533 *) data;
+ struct pn533 *dev = (struct pn533 *)data;
nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
}
static int pn533_poll_complete(struct pn533 *dev, void *arg,
- u8 *params, int params_len)
+ struct sk_buff *resp)
{
struct pn533_poll_modulations *cur_mod;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- if (params_len == -ENOENT) {
- if (dev->poll_mod_count != 0)
- return 0;
-
- nfc_dev_err(&dev->interface->dev,
- "Polling operation has been stopped");
-
- goto stop_poll;
- }
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
- if (params_len < 0) {
- nfc_dev_err(&dev->interface->dev,
- "Error %d when running poll", params_len);
+ nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
+ __func__, rc);
- goto stop_poll;
+ if (rc == -ENOENT) {
+ if (dev->poll_mod_count != 0)
+ return rc;
+ else
+ goto stop_poll;
+ } else if (rc < 0) {
+ nfc_dev_err(&dev->interface->dev,
+ "Error %d when running poll", rc);
+ goto stop_poll;
+ }
}
cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
- if (cur_mod->len == 0) {
+ if (cur_mod->len == 0) { /* Target mode */
del_timer(&dev->listen_timer);
-
- return pn533_init_target_complete(dev, arg, params, params_len);
- } else {
- rc = pn533_start_poll_complete(dev, arg, params, params_len);
- if (!rc)
- return rc;
+ rc = pn533_init_target_complete(dev, resp);
+ goto done;
}
- pn533_poll_next_mod(dev);
+ /* Initiator mode */
+ rc = pn533_start_poll_complete(dev, resp);
+ if (!rc)
+ goto done;
+ pn533_poll_next_mod(dev);
queue_work(dev->wq, &dev->poll_work);
- return 0;
+done:
+ dev_kfree_skb(resp);
+ return rc;
stop_poll:
+ nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
+
pn533_poll_reset_mod_list(dev);
dev->poll_protocols = 0;
- return 0;
+ return rc;
}
-static void pn533_build_poll_frame(struct pn533 *dev,
- struct pn533_frame *frame,
- struct pn533_poll_modulations *mod)
+static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
+ struct pn533_poll_modulations *mod)
{
- nfc_dev_dbg(&dev->interface->dev, "mod len %d\n", mod->len);
+ struct sk_buff *skb;
- if (mod->len == 0) {
- /* Listen mode */
- pn533_init_target_frame(frame, dev->gb, dev->gb_len);
- } else {
- /* Polling mode */
- pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
+ skb = pn533_alloc_skb(dev, mod->len);
+ if (!skb)
+ return NULL;
- memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
- frame->datalen += mod->len;
+ memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
- pn533_tx_frame_finish(frame);
- }
+ return skb;
}
static int pn533_send_poll_frame(struct pn533 *dev)
{
- struct pn533_poll_modulations *cur_mod;
+ struct pn533_poll_modulations *mod;
+ struct sk_buff *skb;
int rc;
+ u8 cmd_code;
- cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
+ mod = dev->poll_mod_active[dev->poll_mod_curr];
- pn533_build_poll_frame(dev, dev->out_frame, cur_mod);
+ nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
+ __func__, mod->len);
- rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen, pn533_poll_complete,
- NULL, GFP_KERNEL);
- if (rc)
+ if (mod->len == 0) { /* Listen mode */
+ cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
+ skb = pn533_alloc_poll_tg_frame(dev);
+ } else { /* Polling mode */
+ cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
+ skb = pn533_alloc_poll_in_frame(dev, mod);
+ }
+
+ if (!skb) {
+ nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
+ return -ENOMEM;
+ }
+
+ rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
+ NULL);
+ if (rc < 0) {
+ dev_kfree_skb(skb);
nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
+ }
return rc;
}
del_timer(&dev->listen_timer);
if (!dev->poll_mod_count) {
- nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
- " running");
+ nfc_dev_dbg(&dev->interface->dev,
+ "Polling operation was not running");
return;
}
static int pn533_activate_target_nfcdep(struct pn533 *dev)
{
- struct pn533_cmd_activate_param param;
- struct pn533_cmd_activate_response *resp;
+ struct pn533_cmd_activate_response *rsp;
u16 gt_len;
int rc;
+ struct sk_buff *skb;
+ struct sk_buff *resp;
+
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
+ skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
+ if (!skb)
+ return -ENOMEM;
- param.tg = 1;
- param.next = 0;
- memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), ¶m,
- sizeof(struct pn533_cmd_activate_param));
- dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
+ *skb_put(skb, sizeof(u8)) = 1; /* TG */
+ *skb_put(skb, sizeof(u8)) = 0; /* Next */
- pn533_tx_frame_finish(dev->out_frame);
+ resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
- rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen);
- if (rc)
- return rc;
-
- resp = (struct pn533_cmd_activate_response *)
- PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
- rc = resp->status & PN533_CMD_RET_MASK;
- if (rc != PN533_CMD_RET_SUCCESS)
+ rsp = (struct pn533_cmd_activate_response *)resp->data;
+ rc = rsp->status & PN533_CMD_RET_MASK;
+ if (rc != PN533_CMD_RET_SUCCESS) {
+ dev_kfree_skb(resp);
return -EIO;
+ }
/* ATR_RES general bytes are located at offset 16 */
- gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
- rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
+ gt_len = resp->len - 16;
+ rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
+ dev_kfree_skb(resp);
return rc;
}
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
- protocol);
+ protocol);
if (dev->poll_mod_count) {
- nfc_dev_err(&dev->interface->dev, "Cannot activate while"
- " polling");
+ nfc_dev_err(&dev->interface->dev,
+ "Cannot activate while polling");
return -EBUSY;
}
if (dev->tgt_active_prot) {
- nfc_dev_err(&dev->interface->dev, "There is already an active"
- " target");
+ nfc_dev_err(&dev->interface->dev,
+ "There is already an active target");
return -EBUSY;
}
if (!dev->tgt_available_prots) {
- nfc_dev_err(&dev->interface->dev, "There is no available target"
- " to activate");
+ nfc_dev_err(&dev->interface->dev,
+ "There is no available target to activate");
return -EINVAL;
}
if (!(dev->tgt_available_prots & (1 << protocol))) {
- nfc_dev_err(&dev->interface->dev, "The target does not support"
- " the requested protocol %u", protocol);
+ nfc_dev_err(&dev->interface->dev,
+ "Target doesn't support requested proto %u",
+ protocol);
return -EINVAL;
}
if (protocol == NFC_PROTO_NFC_DEP) {
rc = pn533_activate_target_nfcdep(dev);
if (rc) {
- nfc_dev_err(&dev->interface->dev, "Error %d when"
- " activating target with"
- " NFC_DEP protocol", rc);
+ nfc_dev_err(&dev->interface->dev,
+ "Activating target with DEP failed %d", rc);
return rc;
}
}
struct nfc_target *target)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
- u8 tg;
- u8 status;
+
+ struct sk_buff *skb;
+ struct sk_buff *resp;
+
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
}
dev->tgt_active_prot = 0;
-
skb_queue_purge(&dev->resp_q);
- pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
-
- tg = 1;
- memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
- dev->out_frame->datalen += sizeof(u8);
+ skb = pn533_alloc_skb(dev, sizeof(u8));
+ if (!skb)
+ return;
- pn533_tx_frame_finish(dev->out_frame);
+ *skb_put(skb, 1) = 1; /* TG*/
- rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen);
- if (rc) {
- nfc_dev_err(&dev->interface->dev, "Error when sending release"
- " command to the controller");
+ resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
+ if (IS_ERR(resp))
return;
- }
- status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
- rc = status & PN533_CMD_RET_MASK;
+ rc = resp->data[0] & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS)
- nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
- " the target", rc);
+ nfc_dev_err(&dev->interface->dev,
+ "Error 0x%x when releasing the target", rc);
+ dev_kfree_skb(resp);
return;
}
static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
- u8 *params, int params_len)
+ struct sk_buff *resp)
{
- struct pn533_cmd_jump_dep *cmd;
- struct pn533_cmd_jump_dep_response *resp;
- struct nfc_target nfc_target;
+ struct pn533_cmd_jump_dep_response *rsp;
u8 target_gt_len;
int rc;
+ u8 active = *(u8 *)arg;
- if (params_len == -ENOENT) {
- nfc_dev_dbg(&dev->interface->dev, "");
- return 0;
- }
+ kfree(arg);
- if (params_len < 0) {
- nfc_dev_err(&dev->interface->dev,
- "Error %d when bringing DEP link up",
- params_len);
- return 0;
- }
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
if (dev->tgt_available_prots &&
!(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
nfc_dev_err(&dev->interface->dev,
- "The target does not support DEP");
- return -EINVAL;
+ "The target does not support DEP");
+ rc = -EINVAL;
+ goto error;
}
- resp = (struct pn533_cmd_jump_dep_response *) params;
- cmd = (struct pn533_cmd_jump_dep *) arg;
- rc = resp->status & PN533_CMD_RET_MASK;
+ rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
+
+ rc = rsp->status & PN533_CMD_RET_MASK;
if (rc != PN533_CMD_RET_SUCCESS) {
nfc_dev_err(&dev->interface->dev,
- "Bringing DEP link up failed %d", rc);
- return 0;
+ "Bringing DEP link up failed %d", rc);
+ goto error;
}
if (!dev->tgt_available_prots) {
+ struct nfc_target nfc_target;
+
nfc_dev_dbg(&dev->interface->dev, "Creating new target");
nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
nfc_target.nfcid1_len = 10;
- memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
+ memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
if (rc)
- return 0;
+ goto error;
dev->tgt_available_prots = 0;
}
dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
/* ATR_RES general bytes are located at offset 17 */
- target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
+ target_gt_len = resp->len - 17;
rc = nfc_set_remote_general_bytes(dev->nfc_dev,
- resp->gt, target_gt_len);
+ rsp->gt, target_gt_len);
if (rc == 0)
rc = nfc_dep_link_is_up(dev->nfc_dev,
- dev->nfc_dev->targets[0].idx,
- !cmd->active, NFC_RF_INITIATOR);
+ dev->nfc_dev->targets[0].idx,
+ !active, NFC_RF_INITIATOR);
- return 0;
+error:
+ dev_kfree_skb(resp);
+ return rc;
}
static int pn533_mod_to_baud(struct pn533 *dev)
#define PASSIVE_DATA_LEN 5
static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
- u8 comm_mode, u8* gb, size_t gb_len)
+ u8 comm_mode, u8 *gb, size_t gb_len)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
- struct pn533_cmd_jump_dep *cmd;
- u8 cmd_len, *data_ptr;
+ struct sk_buff *skb;
+ int rc, baud, skb_len;
+ u8 *next, *arg;
+
u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
- int rc, baud;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (dev->poll_mod_count) {
nfc_dev_err(&dev->interface->dev,
- "Cannot bring the DEP link up while polling");
+ "Cannot bring the DEP link up while polling");
return -EBUSY;
}
if (dev->tgt_active_prot) {
nfc_dev_err(&dev->interface->dev,
- "There is already an active target");
+ "There is already an active target");
return -EBUSY;
}
return baud;
}
- cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
+ skb_len = 3 + gb_len; /* ActPass + BR + Next */
if (comm_mode == NFC_COMM_PASSIVE)
- cmd_len += PASSIVE_DATA_LEN;
+ skb_len += PASSIVE_DATA_LEN;
- cmd = kzalloc(cmd_len, GFP_KERNEL);
- if (cmd == NULL)
+ skb = pn533_alloc_skb(dev, skb_len);
+ if (!skb)
return -ENOMEM;
- pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
+ *skb_put(skb, 1) = !comm_mode; /* ActPass */
+ *skb_put(skb, 1) = baud; /* Baud rate */
+
+ next = skb_put(skb, 1); /* Next */
+ *next = 0;
- cmd->active = !comm_mode;
- cmd->next = 0;
- cmd->baud = baud;
- data_ptr = cmd->data;
- if (comm_mode == NFC_COMM_PASSIVE && cmd->baud > 0) {
- memcpy(data_ptr, passive_data, PASSIVE_DATA_LEN);
- cmd->next |= 1;
- data_ptr += PASSIVE_DATA_LEN;
+ if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
+ memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
+ PASSIVE_DATA_LEN);
+ *next |= 1;
}
if (gb != NULL && gb_len > 0) {
- cmd->next |= 4; /* We have some Gi */
- memcpy(data_ptr, gb, gb_len);
+ memcpy(skb_put(skb, gb_len), gb, gb_len);
+ *next |= 4; /* We have some Gi */
} else {
- cmd->next = 0;
+ *next = 0;
}
- memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
- dev->out_frame->datalen += cmd_len;
+ arg = kmalloc(sizeof(*arg), GFP_KERNEL);
+ if (!arg) {
+ dev_kfree_skb(skb);
+ return -ENOMEM;
+ }
- pn533_tx_frame_finish(dev->out_frame);
-
- rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen, pn533_in_dep_link_up_complete,
- cmd, GFP_KERNEL);
- if (rc)
- goto out;
+ *arg = !comm_mode;
+ rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
+ pn533_in_dep_link_up_complete, arg);
-out:
- kfree(cmd);
+ if (rc < 0) {
+ dev_kfree_skb(skb);
+ kfree(arg);
+ }
return rc;
}
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
pn533_poll_reset_mod_list(dev);
if (dev->tgt_mode || dev->tgt_active_prot) {
return 0;
}
-static int pn533_build_tx_frame(struct pn533 *dev, struct sk_buff *skb,
- bool target)
-{
- int payload_len = skb->len;
- struct pn533_frame *out_frame;
- u8 tg;
-
- nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
- payload_len);
-
- if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
- /* TODO: Implement support to multi-part data exchange */
- nfc_dev_err(&dev->interface->dev, "Data length greater than the"
- " max allowed: %d",
- PN533_CMD_DATAEXCH_DATA_MAXLEN);
- return -ENOSYS;
- }
-
- if (target == true) {
- switch (dev->device_type) {
- case PN533_DEVICE_PASORI:
- if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
- skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN - 1);
- out_frame = (struct pn533_frame *) skb->data;
- pn533_tx_frame_init(out_frame,
- PN533_CMD_IN_COMM_THRU);
-
- break;
- }
-
- default:
- skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
- out_frame = (struct pn533_frame *) skb->data;
- pn533_tx_frame_init(out_frame,
- PN533_CMD_IN_DATA_EXCHANGE);
- tg = 1;
- memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame),
- &tg, sizeof(u8));
- out_frame->datalen += sizeof(u8);
-
- break;
- }
-
- } else {
- skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN - 1);
- out_frame = (struct pn533_frame *) skb->data;
- pn533_tx_frame_init(out_frame, PN533_CMD_TG_SET_DATA);
- }
-
-
- /* The data is already in the out_frame, just update the datalen */
- out_frame->datalen += payload_len;
-
- pn533_tx_frame_finish(out_frame);
- skb_put(skb, PN533_FRAME_TAIL_SIZE);
-
- return 0;
-}
-
struct pn533_data_exchange_arg {
- struct sk_buff *skb_resp;
- struct sk_buff *skb_out;
data_exchange_cb_t cb;
void *cb_context;
};
struct sk_buff *skb, *tmp, *t;
unsigned int skb_len = 0, tmp_len = 0;
- nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
if (skb_queue_empty(&dev->resp_q))
return NULL;
}
static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
- u8 *params, int params_len)
+ struct sk_buff *resp)
{
struct pn533_data_exchange_arg *arg = _arg;
- struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
- struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
- int err = 0;
- u8 status;
- u8 cmd_ret;
+ struct sk_buff *skb;
+ int rc = 0;
+ u8 status, ret, mi;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- dev_kfree_skb(arg->skb_out);
-
- if (params_len < 0) { /* error */
- err = params_len;
- goto error;
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ goto _error;
}
- status = params[0];
+ status = resp->data[0];
+ ret = status & PN533_CMD_RET_MASK;
+ mi = status & PN533_CMD_MI_MASK;
+
+ skb_pull(resp, sizeof(status));
- cmd_ret = status & PN533_CMD_RET_MASK;
- if (cmd_ret != PN533_CMD_RET_SUCCESS) {
- nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
- " exchanging data", cmd_ret);
- err = -EIO;
+ if (ret != PN533_CMD_RET_SUCCESS) {
+ nfc_dev_err(&dev->interface->dev,
+ "PN533 reported error %d when exchanging data",
+ ret);
+ rc = -EIO;
goto error;
}
- skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
- skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
- skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
- skb_queue_tail(&dev->resp_q, skb_resp);
+ skb_queue_tail(&dev->resp_q, resp);
- if (status & PN533_CMD_MI_MASK) {
+ if (mi) {
+ dev->cmd_complete_mi_arg = arg;
queue_work(dev->wq, &dev->mi_work);
return -EINPROGRESS;
}
skb = pn533_build_response(dev);
- if (skb == NULL)
+ if (!skb)
goto error;
arg->cb(arg->cb_context, skb, 0);
return 0;
error:
+ dev_kfree_skb(resp);
+_error:
skb_queue_purge(&dev->resp_q);
- dev_kfree_skb(skb_resp);
- arg->cb(arg->cb_context, NULL, err);
+ arg->cb(arg->cb_context, NULL, rc);
kfree(arg);
- return 0;
+ return rc;
}
static int pn533_transceive(struct nfc_dev *nfc_dev,
data_exchange_cb_t cb, void *cb_context)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
- struct pn533_frame *out_frame, *in_frame;
- struct pn533_data_exchange_arg *arg;
- struct sk_buff *skb_resp;
- int skb_resp_len;
+ struct pn533_data_exchange_arg *arg = NULL;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- if (!dev->tgt_active_prot) {
- nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
- " there is no active target");
- rc = -EINVAL;
+ if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
+ /* TODO: Implement support to multi-part data exchange */
+ nfc_dev_err(&dev->interface->dev,
+ "Data length greater than the max allowed: %d",
+ PN533_CMD_DATAEXCH_DATA_MAXLEN);
+ rc = -ENOSYS;
goto error;
}
- rc = pn533_build_tx_frame(dev, skb, true);
- if (rc)
- goto error;
-
- skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
- PN533_CMD_DATAEXCH_DATA_MAXLEN +
- PN533_FRAME_TAIL_SIZE;
-
- skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
- if (!skb_resp) {
- rc = -ENOMEM;
+ if (!dev->tgt_active_prot) {
+ nfc_dev_err(&dev->interface->dev,
+ "Can't exchange data if there is no active target");
+ rc = -EINVAL;
goto error;
}
- in_frame = (struct pn533_frame *) skb_resp->data;
- out_frame = (struct pn533_frame *) skb->data;
-
- arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
+ arg = kmalloc(sizeof(*arg), GFP_KERNEL);
if (!arg) {
rc = -ENOMEM;
- goto free_skb_resp;
+ goto error;
}
- arg->skb_resp = skb_resp;
- arg->skb_out = skb;
arg->cb = cb;
arg->cb_context = cb_context;
- rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
- pn533_data_exchange_complete, arg,
- GFP_KERNEL);
- if (rc) {
- nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
- " perform data_exchange", rc);
- goto free_arg;
+ switch (dev->device_type) {
+ case PN533_DEVICE_PASORI:
+ if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
+ rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
+ skb,
+ pn533_data_exchange_complete,
+ arg);
+
+ break;
+ }
+ default:
+ *skb_push(skb, sizeof(u8)) = 1; /*TG*/
+
+ rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
+ skb, pn533_data_exchange_complete,
+ arg);
+
+ break;
}
+ if (rc < 0) /* rc from send_async */
+ goto error;
+
return 0;
-free_arg:
- kfree(arg);
-free_skb_resp:
- kfree_skb(skb_resp);
error:
- kfree_skb(skb);
+ kfree(arg);
+ dev_kfree_skb(skb);
return rc;
}
static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
- u8 *params, int params_len)
+ struct sk_buff *resp)
{
+ u8 status;
+
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- if (params_len < 0) {
- nfc_dev_err(&dev->interface->dev,
- "Error %d when sending data",
- params_len);
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
- return params_len;
- }
+ status = resp->data[0];
+
+ dev_kfree_skb(resp);
- if (params_len > 0 && params[0] != 0) {
+ if (status != 0) {
nfc_tm_deactivated(dev->nfc_dev);
dev->tgt_mode = 0;
static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
- struct pn533_frame *out_frame;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- rc = pn533_build_tx_frame(dev, skb, false);
- if (rc)
- goto error;
-
- out_frame = (struct pn533_frame *) skb->data;
-
- rc = pn533_send_cmd_frame_async(dev, out_frame, dev->in_frame,
- dev->in_maxlen, pn533_tm_send_complete,
- NULL, GFP_KERNEL);
- if (rc) {
+ if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
nfc_dev_err(&dev->interface->dev,
- "Error %d when trying to send data", rc);
- goto error;
+ "Data length greater than the max allowed: %d",
+ PN533_CMD_DATAEXCH_DATA_MAXLEN);
+ return -ENOSYS;
}
- return 0;
-
-error:
- kfree_skb(skb);
+ rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
+ pn533_tm_send_complete, NULL);
+ if (rc < 0)
+ dev_kfree_skb(skb);
return rc;
}
static void pn533_wq_mi_recv(struct work_struct *work)
{
struct pn533 *dev = container_of(work, struct pn533, mi_work);
- struct sk_buff *skb_cmd;
- struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
- struct pn533_frame *out_frame, *in_frame;
- struct sk_buff *skb_resp;
- int skb_resp_len;
+
+ struct sk_buff *skb;
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- /* This is a zero payload size skb */
- skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
- GFP_KERNEL);
- if (skb_cmd == NULL)
- goto error_cmd;
-
- skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
+ skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
+ if (!skb)
+ goto error;
- rc = pn533_build_tx_frame(dev, skb_cmd, true);
- if (rc)
- goto error_frame;
+ switch (dev->device_type) {
+ case PN533_DEVICE_PASORI:
+ if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
+ rc = pn533_send_cmd_direct_async(dev,
+ PN533_CMD_IN_COMM_THRU,
+ skb,
+ pn533_data_exchange_complete,
+ dev->cmd_complete_mi_arg);
- skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
- PN533_CMD_DATAEXCH_DATA_MAXLEN +
- PN533_FRAME_TAIL_SIZE;
- skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
- if (!skb_resp) {
- rc = -ENOMEM;
- goto error_frame;
- }
+ break;
+ }
+ default:
+ *skb_put(skb, sizeof(u8)) = 1; /*TG*/
- in_frame = (struct pn533_frame *) skb_resp->data;
- out_frame = (struct pn533_frame *) skb_cmd->data;
+ rc = pn533_send_cmd_direct_async(dev,
+ PN533_CMD_IN_DATA_EXCHANGE,
+ skb,
+ pn533_data_exchange_complete,
+ dev->cmd_complete_mi_arg);
- arg->skb_resp = skb_resp;
- arg->skb_out = skb_cmd;
+ break;
+ }
- rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
- skb_resp_len,
- pn533_data_exchange_complete,
- dev->cmd_complete_arg, GFP_KERNEL);
- if (!rc)
+ if (rc == 0) /* success */
return;
- nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
- " perform data_exchange", rc);
+ nfc_dev_err(&dev->interface->dev,
+ "Error %d when trying to perform data_exchange", rc);
- kfree_skb(skb_resp);
+ dev_kfree_skb(skb);
+ kfree(dev->cmd_complete_arg);
-error_frame:
- kfree_skb(skb_cmd);
-
-error_cmd:
+error:
pn533_send_ack(dev, GFP_KERNEL);
-
- kfree(arg);
-
queue_work(dev->wq, &dev->cmd_work);
}
static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
u8 cfgdata_len)
{
- int rc;
- u8 *params;
+ struct sk_buff *skb;
+ struct sk_buff *resp;
+
+ int skb_len;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
+ skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
- params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
- params[0] = cfgitem;
- memcpy(¶ms[1], cfgdata, cfgdata_len);
- dev->out_frame->datalen += (1 + cfgdata_len);
+ skb = pn533_alloc_skb(dev, skb_len);
+ if (!skb)
+ return -ENOMEM;
- pn533_tx_frame_finish(dev->out_frame);
+ *skb_put(skb, sizeof(cfgitem)) = cfgitem;
+ memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
- rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen);
+ resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
- return rc;
+ dev_kfree_skb(resp);
+ return 0;
+}
+
+static int pn533_get_firmware_version(struct pn533 *dev,
+ struct pn533_fw_version *fv)
+{
+ struct sk_buff *skb;
+ struct sk_buff *resp;
+
+ skb = pn533_alloc_skb(dev, 0);
+ if (!skb)
+ return -ENOMEM;
+
+ resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
+
+ fv->ic = resp->data[0];
+ fv->ver = resp->data[1];
+ fv->rev = resp->data[2];
+ fv->support = resp->data[3];
+
+ dev_kfree_skb(resp);
+ return 0;
}
static int pn533_fw_reset(struct pn533 *dev)
{
- int rc;
- u8 *params;
+ struct sk_buff *skb;
+ struct sk_buff *resp;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
- pn533_tx_frame_init(dev->out_frame, 0x18);
+ skb = pn533_alloc_skb(dev, sizeof(u8));
+ if (!skb)
+ return -ENOMEM;
- params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
- params[0] = 0x1;
- dev->out_frame->datalen += 1;
+ *skb_put(skb, sizeof(u8)) = 0x1;
- pn533_tx_frame_finish(dev->out_frame);
+ resp = pn533_send_cmd_sync(dev, 0x18, skb);
+ if (IS_ERR(resp))
+ return PTR_ERR(resp);
- rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen);
+ dev_kfree_skb(resp);
- return rc;
+ return 0;
}
static struct nfc_ops pn533_nfc_ops = {
static int pn533_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
- struct pn533_fw_version *fw_ver;
+ struct pn533_fw_version fw_ver;
struct pn533 *dev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
- if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
- dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
+ if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
in_endpoint = endpoint->bEndpointAddress;
- }
- if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
- dev->out_maxlen =
- le16_to_cpu(endpoint->wMaxPacketSize);
+ if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
out_endpoint = endpoint->bEndpointAddress;
- }
}
if (!in_endpoint || !out_endpoint) {
- nfc_dev_err(&interface->dev, "Could not find bulk-in or"
- " bulk-out endpoint");
+ nfc_dev_err(&interface->dev,
+ "Could not find bulk-in or bulk-out endpoint");
rc = -ENODEV;
goto error;
}
- dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
- dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!dev->in_frame || !dev->out_frame ||
- !dev->in_urb || !dev->out_urb)
+ if (!dev->in_urb || !dev->out_urb)
goto error;
usb_fill_bulk_urb(dev->in_urb, dev->udev,
- usb_rcvbulkpipe(dev->udev, in_endpoint),
- NULL, 0, NULL, dev);
+ usb_rcvbulkpipe(dev->udev, in_endpoint),
+ NULL, 0, NULL, dev);
usb_fill_bulk_urb(dev->out_urb, dev->udev,
- usb_sndbulkpipe(dev->udev, out_endpoint),
- NULL, 0,
- pn533_send_complete, dev);
+ usb_sndbulkpipe(dev->udev, out_endpoint),
+ NULL, 0, pn533_send_complete, dev);
INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
usb_set_intfdata(interface, dev);
- pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
- pn533_tx_frame_finish(dev->out_frame);
-
- rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
- dev->in_maxlen);
- if (rc)
- goto destroy_wq;
-
- fw_ver = (struct pn533_fw_version *)
- PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
- nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
- " attached", fw_ver->ver, fw_ver->rev);
+ dev->ops = &pn533_std_frame_ops;
dev->device_type = id->driver_info;
switch (dev->device_type) {
goto destroy_wq;
}
+ memset(&fw_ver, 0, sizeof(fw_ver));
+ rc = pn533_get_firmware_version(dev, &fw_ver);
+ if (rc < 0)
+ goto destroy_wq;
+
+ nfc_dev_info(&dev->interface->dev,
+ "NXP PN533 firmware ver %d.%d now attached",
+ fw_ver.ver, fw_ver.rev);
+
+
dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
+ NFC_SE_NONE,
+ dev->ops->tx_header_len +
PN533_CMD_DATAEXCH_HEAD_LEN,
- PN533_FRAME_TAIL_SIZE);
+ dev->ops->tx_tail_len);
if (!dev->nfc_dev)
goto destroy_wq;
destroy_wq:
destroy_workqueue(dev->wq);
error:
- kfree(dev->in_frame);
usb_free_urb(dev->in_urb);
- kfree(dev->out_frame);
usb_free_urb(dev->out_urb);
kfree(dev);
return rc;
kfree(cmd);
}
- kfree(dev->in_frame);
usb_free_urb(dev->in_urb);
- kfree(dev->out_frame);
usb_free_urb(dev->out_urb);
kfree(dev);
+++ /dev/null
-/*
- * Driver for the PN544 NFC chip.
- *
- * Copyright (C) Nokia Corporation
- *
- * Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
- * Contact: Matti Aaltonen <matti.j.aaltonen@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/completion.h>
-#include <linux/crc-ccitt.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/nfc/pn544.h>
-#include <linux/poll.h>
-#include <linux/regulator/consumer.h>
-#include <linux/serial_core.h> /* for TCGETS */
-#include <linux/slab.h>
-
-#define DRIVER_CARD "PN544 NFC"
-#define DRIVER_DESC "NFC driver for PN544"
-
-static struct i2c_device_id pn544_id_table[] = {
- { PN544_DRIVER_NAME, 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, pn544_id_table);
-
-#define HCI_MODE 0
-#define FW_MODE 1
-
-enum pn544_state {
- PN544_ST_COLD,
- PN544_ST_FW_READY,
- PN544_ST_READY,
-};
-
-enum pn544_irq {
- PN544_NONE,
- PN544_INT,
-};
-
-struct pn544_info {
- struct miscdevice miscdev;
- struct i2c_client *i2c_dev;
- struct regulator_bulk_data regs[3];
-
- enum pn544_state state;
- wait_queue_head_t read_wait;
- loff_t read_offset;
- enum pn544_irq read_irq;
- struct mutex read_mutex; /* Serialize read_irq access */
- struct mutex mutex; /* Serialize info struct access */
- u8 *buf;
- size_t buflen;
-};
-
-static const char reg_vdd_io[] = "Vdd_IO";
-static const char reg_vbat[] = "VBat";
-static const char reg_vsim[] = "VSim";
-
-/* sysfs interface */
-static ssize_t pn544_test(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct pn544_info *info = dev_get_drvdata(dev);
- struct i2c_client *client = info->i2c_dev;
- struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
-
- return snprintf(buf, PAGE_SIZE, "%d\n", pdata->test());
-}
-
-static int pn544_enable(struct pn544_info *info, int mode)
-{
- struct pn544_nfc_platform_data *pdata;
- struct i2c_client *client = info->i2c_dev;
-
- int r;
-
- r = regulator_bulk_enable(ARRAY_SIZE(info->regs), info->regs);
- if (r < 0)
- return r;
-
- pdata = client->dev.platform_data;
- info->read_irq = PN544_NONE;
- if (pdata->enable)
- pdata->enable(mode);
-
- if (mode) {
- info->state = PN544_ST_FW_READY;
- dev_dbg(&client->dev, "now in FW-mode\n");
- } else {
- info->state = PN544_ST_READY;
- dev_dbg(&client->dev, "now in HCI-mode\n");
- }
-
- usleep_range(10000, 15000);
-
- return 0;
-}
-
-static void pn544_disable(struct pn544_info *info)
-{
- struct pn544_nfc_platform_data *pdata;
- struct i2c_client *client = info->i2c_dev;
-
- pdata = client->dev.platform_data;
- if (pdata->disable)
- pdata->disable();
-
- info->state = PN544_ST_COLD;
-
- dev_dbg(&client->dev, "Now in OFF-mode\n");
-
- msleep(PN544_RESETVEN_TIME);
-
- info->read_irq = PN544_NONE;
- regulator_bulk_disable(ARRAY_SIZE(info->regs), info->regs);
-}
-
-static int check_crc(u8 *buf, int buflen)
-{
- u8 len;
- u16 crc;
-
- len = buf[0] + 1;
- if (len < 4 || len != buflen || len > PN544_MSG_MAX_SIZE) {
- pr_err(PN544_DRIVER_NAME
- ": CRC; corrupt packet len %u (%d)\n", len, buflen);
- print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
- 16, 2, buf, buflen, false);
- return -EPERM;
- }
- crc = crc_ccitt(0xffff, buf, len - 2);
- crc = ~crc;
-
- if (buf[len-2] != (crc & 0xff) || buf[len-1] != (crc >> 8)) {
- pr_err(PN544_DRIVER_NAME ": CRC error 0x%x != 0x%x 0x%x\n",
- crc, buf[len-1], buf[len-2]);
-
- print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
- 16, 2, buf, buflen, false);
- return -EPERM;
- }
- return 0;
-}
-
-static int pn544_i2c_write(struct i2c_client *client, u8 *buf, int len)
-{
- int r;
-
- if (len < 4 || len != (buf[0] + 1)) {
- dev_err(&client->dev, "%s: Illegal message length: %d\n",
- __func__, len);
- return -EINVAL;
- }
-
- if (check_crc(buf, len))
- return -EINVAL;
-
- usleep_range(3000, 6000);
-
- r = i2c_master_send(client, buf, len);
- dev_dbg(&client->dev, "send: %d\n", r);
-
- if (r == -EREMOTEIO) { /* Retry, chip was in standby */
- usleep_range(6000, 10000);
- r = i2c_master_send(client, buf, len);
- dev_dbg(&client->dev, "send2: %d\n", r);
- }
-
- if (r != len)
- return -EREMOTEIO;
-
- return r;
-}
-
-static int pn544_i2c_read(struct i2c_client *client, u8 *buf, int buflen)
-{
- int r;
- u8 len;
-
- /*
- * You could read a packet in one go, but then you'd need to read
- * max size and rest would be 0xff fill, so we do split reads.
- */
- r = i2c_master_recv(client, &len, 1);
- dev_dbg(&client->dev, "recv1: %d\n", r);
-
- if (r != 1)
- return -EREMOTEIO;
-
- if (len < PN544_LLC_HCI_OVERHEAD)
- len = PN544_LLC_HCI_OVERHEAD;
- else if (len > (PN544_MSG_MAX_SIZE - 1))
- len = PN544_MSG_MAX_SIZE - 1;
-
- if (1 + len > buflen) /* len+(data+crc16) */
- return -EMSGSIZE;
-
- buf[0] = len;
-
- r = i2c_master_recv(client, buf + 1, len);
- dev_dbg(&client->dev, "recv2: %d\n", r);
-
- if (r != len)
- return -EREMOTEIO;
-
- usleep_range(3000, 6000);
-
- return r + 1;
-}
-
-static int pn544_fw_write(struct i2c_client *client, u8 *buf, int len)
-{
- int r;
-
- dev_dbg(&client->dev, "%s\n", __func__);
-
- if (len < PN544_FW_HEADER_SIZE ||
- (PN544_FW_HEADER_SIZE + (buf[1] << 8) + buf[2]) != len)
- return -EINVAL;
-
- r = i2c_master_send(client, buf, len);
- dev_dbg(&client->dev, "fw send: %d\n", r);
-
- if (r == -EREMOTEIO) { /* Retry, chip was in standby */
- usleep_range(6000, 10000);
- r = i2c_master_send(client, buf, len);
- dev_dbg(&client->dev, "fw send2: %d\n", r);
- }
-
- if (r != len)
- return -EREMOTEIO;
-
- return r;
-}
-
-static int pn544_fw_read(struct i2c_client *client, u8 *buf, int buflen)
-{
- int r, len;
-
- if (buflen < PN544_FW_HEADER_SIZE)
- return -EINVAL;
-
- r = i2c_master_recv(client, buf, PN544_FW_HEADER_SIZE);
- dev_dbg(&client->dev, "FW recv1: %d\n", r);
-
- if (r < 0)
- return r;
-
- if (r < PN544_FW_HEADER_SIZE)
- return -EINVAL;
-
- len = (buf[1] << 8) + buf[2];
- if (len == 0) /* just header, no additional data */
- return r;
-
- if (len > buflen - PN544_FW_HEADER_SIZE)
- return -EMSGSIZE;
-
- r = i2c_master_recv(client, buf + PN544_FW_HEADER_SIZE, len);
- dev_dbg(&client->dev, "fw recv2: %d\n", r);
-
- if (r != len)
- return -EINVAL;
-
- return r + PN544_FW_HEADER_SIZE;
-}
-
-static irqreturn_t pn544_irq_thread_fn(int irq, void *dev_id)
-{
- struct pn544_info *info = dev_id;
- struct i2c_client *client = info->i2c_dev;
-
- BUG_ON(!info);
- BUG_ON(irq != info->i2c_dev->irq);
-
- dev_dbg(&client->dev, "IRQ\n");
-
- mutex_lock(&info->read_mutex);
- info->read_irq = PN544_INT;
- mutex_unlock(&info->read_mutex);
-
- wake_up_interruptible(&info->read_wait);
-
- return IRQ_HANDLED;
-}
-
-static enum pn544_irq pn544_irq_state(struct pn544_info *info)
-{
- enum pn544_irq irq;
-
- mutex_lock(&info->read_mutex);
- irq = info->read_irq;
- mutex_unlock(&info->read_mutex);
- /*
- * XXX: should we check GPIO-line status directly?
- * return pdata->irq_status() ? PN544_INT : PN544_NONE;
- */
-
- return irq;
-}
-
-static ssize_t pn544_read(struct file *file, char __user *buf,
- size_t count, loff_t *offset)
-{
- struct pn544_info *info = container_of(file->private_data,
- struct pn544_info, miscdev);
- struct i2c_client *client = info->i2c_dev;
- enum pn544_irq irq;
- size_t len;
- int r = 0;
-
- dev_dbg(&client->dev, "%s: info: %p, count: %zu\n", __func__,
- info, count);
-
- mutex_lock(&info->mutex);
-
- if (info->state == PN544_ST_COLD) {
- r = -ENODEV;
- goto out;
- }
-
- irq = pn544_irq_state(info);
- if (irq == PN544_NONE) {
- if (file->f_flags & O_NONBLOCK) {
- r = -EAGAIN;
- goto out;
- }
-
- if (wait_event_interruptible(info->read_wait,
- (info->read_irq == PN544_INT))) {
- r = -ERESTARTSYS;
- goto out;
- }
- }
-
- if (info->state == PN544_ST_FW_READY) {
- len = min(count, info->buflen);
-
- mutex_lock(&info->read_mutex);
- r = pn544_fw_read(info->i2c_dev, info->buf, len);
- info->read_irq = PN544_NONE;
- mutex_unlock(&info->read_mutex);
-
- if (r < 0) {
- dev_err(&info->i2c_dev->dev, "FW read failed: %d\n", r);
- goto out;
- }
-
- print_hex_dump(KERN_DEBUG, "FW read: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, r, false);
-
- *offset += r;
- if (copy_to_user(buf, info->buf, r)) {
- r = -EFAULT;
- goto out;
- }
- } else {
- len = min(count, info->buflen);
-
- mutex_lock(&info->read_mutex);
- r = pn544_i2c_read(info->i2c_dev, info->buf, len);
- info->read_irq = PN544_NONE;
- mutex_unlock(&info->read_mutex);
-
- if (r < 0) {
- dev_err(&info->i2c_dev->dev, "read failed (%d)\n", r);
- goto out;
- }
- print_hex_dump(KERN_DEBUG, "read: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, r, false);
-
- *offset += r;
- if (copy_to_user(buf, info->buf, r)) {
- r = -EFAULT;
- goto out;
- }
- }
-
-out:
- mutex_unlock(&info->mutex);
-
- return r;
-}
-
-static unsigned int pn544_poll(struct file *file, poll_table *wait)
-{
- struct pn544_info *info = container_of(file->private_data,
- struct pn544_info, miscdev);
- struct i2c_client *client = info->i2c_dev;
- int r = 0;
-
- dev_dbg(&client->dev, "%s: info: %p\n", __func__, info);
-
- mutex_lock(&info->mutex);
-
- if (info->state == PN544_ST_COLD) {
- r = -ENODEV;
- goto out;
- }
-
- poll_wait(file, &info->read_wait, wait);
-
- if (pn544_irq_state(info) == PN544_INT) {
- r = POLLIN | POLLRDNORM;
- goto out;
- }
-out:
- mutex_unlock(&info->mutex);
-
- return r;
-}
-
-static ssize_t pn544_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct pn544_info *info = container_of(file->private_data,
- struct pn544_info, miscdev);
- struct i2c_client *client = info->i2c_dev;
- ssize_t len;
- int r;
-
- dev_dbg(&client->dev, "%s: info: %p, count %zu\n", __func__,
- info, count);
-
- mutex_lock(&info->mutex);
-
- if (info->state == PN544_ST_COLD) {
- r = -ENODEV;
- goto out;
- }
-
- /*
- * XXX: should we detect rset-writes and clean possible
- * read_irq state
- */
- if (info->state == PN544_ST_FW_READY) {
- size_t fw_len;
-
- if (count < PN544_FW_HEADER_SIZE) {
- r = -EINVAL;
- goto out;
- }
-
- len = min(count, info->buflen);
- if (copy_from_user(info->buf, buf, len)) {
- r = -EFAULT;
- goto out;
- }
-
- print_hex_dump(KERN_DEBUG, "FW write: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, len, false);
-
- fw_len = PN544_FW_HEADER_SIZE + (info->buf[1] << 8) +
- info->buf[2];
-
- if (len > fw_len) /* 1 msg at a time */
- len = fw_len;
-
- r = pn544_fw_write(info->i2c_dev, info->buf, len);
- } else {
- if (count < PN544_LLC_MIN_SIZE) {
- r = -EINVAL;
- goto out;
- }
-
- len = min(count, info->buflen);
- if (copy_from_user(info->buf, buf, len)) {
- r = -EFAULT;
- goto out;
- }
-
- print_hex_dump(KERN_DEBUG, "write: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, len, false);
-
- if (len > (info->buf[0] + 1)) /* 1 msg at a time */
- len = info->buf[0] + 1;
-
- r = pn544_i2c_write(info->i2c_dev, info->buf, len);
- }
-out:
- mutex_unlock(&info->mutex);
-
- return r;
-
-}
-
-static long pn544_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- struct pn544_info *info = container_of(file->private_data,
- struct pn544_info, miscdev);
- struct i2c_client *client = info->i2c_dev;
- struct pn544_nfc_platform_data *pdata;
- unsigned int val;
- int r = 0;
-
- dev_dbg(&client->dev, "%s: info: %p, cmd: 0x%x\n", __func__, info, cmd);
-
- mutex_lock(&info->mutex);
-
- if (info->state == PN544_ST_COLD) {
- r = -ENODEV;
- goto out;
- }
-
- pdata = info->i2c_dev->dev.platform_data;
- switch (cmd) {
- case PN544_GET_FW_MODE:
- dev_dbg(&client->dev, "%s: PN544_GET_FW_MODE\n", __func__);
-
- val = (info->state == PN544_ST_FW_READY);
- if (copy_to_user((void __user *)arg, &val, sizeof(val))) {
- r = -EFAULT;
- goto out;
- }
-
- break;
-
- case PN544_SET_FW_MODE:
- dev_dbg(&client->dev, "%s: PN544_SET_FW_MODE\n", __func__);
-
- if (copy_from_user(&val, (void __user *)arg, sizeof(val))) {
- r = -EFAULT;
- goto out;
- }
-
- if (val) {
- if (info->state == PN544_ST_FW_READY)
- break;
-
- pn544_disable(info);
- r = pn544_enable(info, FW_MODE);
- if (r < 0)
- goto out;
- } else {
- if (info->state == PN544_ST_READY)
- break;
- pn544_disable(info);
- r = pn544_enable(info, HCI_MODE);
- if (r < 0)
- goto out;
- }
- file->f_pos = info->read_offset;
- break;
-
- case TCGETS:
- dev_dbg(&client->dev, "%s: TCGETS\n", __func__);
-
- r = -ENOIOCTLCMD;
- break;
-
- default:
- dev_err(&client->dev, "Unknown ioctl 0x%x\n", cmd);
- r = -ENOIOCTLCMD;
- break;
- }
-
-out:
- mutex_unlock(&info->mutex);
-
- return r;
-}
-
-static int pn544_open(struct inode *inode, struct file *file)
-{
- struct pn544_info *info = container_of(file->private_data,
- struct pn544_info, miscdev);
- struct i2c_client *client = info->i2c_dev;
- int r = 0;
-
- dev_dbg(&client->dev, "%s: info: %p, client %p\n", __func__,
- info, info->i2c_dev);
-
- mutex_lock(&info->mutex);
-
- /*
- * Only 1 at a time.
- * XXX: maybe user (counter) would work better
- */
- if (info->state != PN544_ST_COLD) {
- r = -EBUSY;
- goto out;
- }
-
- file->f_pos = info->read_offset;
- r = pn544_enable(info, HCI_MODE);
-
-out:
- mutex_unlock(&info->mutex);
- return r;
-}
-
-static int pn544_close(struct inode *inode, struct file *file)
-{
- struct pn544_info *info = container_of(file->private_data,
- struct pn544_info, miscdev);
- struct i2c_client *client = info->i2c_dev;
-
- dev_dbg(&client->dev, "%s: info: %p, client %p\n",
- __func__, info, info->i2c_dev);
-
- mutex_lock(&info->mutex);
- pn544_disable(info);
- mutex_unlock(&info->mutex);
-
- return 0;
-}
-
-static const struct file_operations pn544_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = pn544_read,
- .write = pn544_write,
- .poll = pn544_poll,
- .open = pn544_open,
- .release = pn544_close,
- .unlocked_ioctl = pn544_ioctl,
-};
-
-#ifdef CONFIG_PM
-static int pn544_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct pn544_info *info;
- int r = 0;
-
- dev_info(&client->dev, "***\n%s: client %p\n***\n", __func__, client);
-
- info = i2c_get_clientdata(client);
- dev_info(&client->dev, "%s: info: %p, client %p\n", __func__,
- info, client);
-
- mutex_lock(&info->mutex);
-
- switch (info->state) {
- case PN544_ST_FW_READY:
- /* Do not suspend while upgrading FW, please! */
- r = -EPERM;
- break;
-
- case PN544_ST_READY:
- /*
- * CHECK: Device should be in standby-mode. No way to check?
- * Allowing low power mode for the regulator is potentially
- * dangerous if pn544 does not go to suspension.
- */
- break;
-
- case PN544_ST_COLD:
- break;
- };
-
- mutex_unlock(&info->mutex);
- return r;
-}
-
-static int pn544_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct pn544_info *info = i2c_get_clientdata(client);
- int r = 0;
-
- dev_dbg(&client->dev, "%s: info: %p, client %p\n", __func__,
- info, client);
-
- mutex_lock(&info->mutex);
-
- switch (info->state) {
- case PN544_ST_READY:
- /*
- * CHECK: If regulator low power mode is allowed in
- * pn544_suspend, we should go back to normal mode
- * here.
- */
- break;
-
- case PN544_ST_COLD:
- break;
-
- case PN544_ST_FW_READY:
- break;
- };
-
- mutex_unlock(&info->mutex);
-
- return r;
-}
-
-static SIMPLE_DEV_PM_OPS(pn544_pm_ops, pn544_suspend, pn544_resume);
-#endif
-
-static struct device_attribute pn544_attr =
- __ATTR(nfc_test, S_IRUGO, pn544_test, NULL);
-
-static int __devinit pn544_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct pn544_info *info;
- struct pn544_nfc_platform_data *pdata;
- int r = 0;
-
- dev_dbg(&client->dev, "%s\n", __func__);
- dev_dbg(&client->dev, "IRQ: %d\n", client->irq);
-
- /* private data allocation */
- info = kzalloc(sizeof(struct pn544_info), GFP_KERNEL);
- if (!info) {
- dev_err(&client->dev,
- "Cannot allocate memory for pn544_info.\n");
- r = -ENOMEM;
- goto err_info_alloc;
- }
-
- info->buflen = max(PN544_MSG_MAX_SIZE, PN544_MAX_I2C_TRANSFER);
- info->buf = kzalloc(info->buflen, GFP_KERNEL);
- if (!info->buf) {
- dev_err(&client->dev,
- "Cannot allocate memory for pn544_info->buf.\n");
- r = -ENOMEM;
- goto err_buf_alloc;
- }
-
- info->regs[0].supply = reg_vdd_io;
- info->regs[1].supply = reg_vbat;
- info->regs[2].supply = reg_vsim;
- r = regulator_bulk_get(&client->dev, ARRAY_SIZE(info->regs),
- info->regs);
- if (r < 0)
- goto err_kmalloc;
-
- info->i2c_dev = client;
- info->state = PN544_ST_COLD;
- info->read_irq = PN544_NONE;
- mutex_init(&info->read_mutex);
- mutex_init(&info->mutex);
- init_waitqueue_head(&info->read_wait);
- i2c_set_clientdata(client, info);
- pdata = client->dev.platform_data;
- if (!pdata) {
- dev_err(&client->dev, "No platform data\n");
- r = -EINVAL;
- goto err_reg;
- }
-
- if (!pdata->request_resources) {
- dev_err(&client->dev, "request_resources() missing\n");
- r = -EINVAL;
- goto err_reg;
- }
-
- r = pdata->request_resources(client);
- if (r) {
- dev_err(&client->dev, "Cannot get platform resources\n");
- goto err_reg;
- }
-
- r = request_threaded_irq(client->irq, NULL, pn544_irq_thread_fn,
- IRQF_TRIGGER_RISING, PN544_DRIVER_NAME,
- info);
- if (r < 0) {
- dev_err(&client->dev, "Unable to register IRQ handler\n");
- goto err_res;
- }
-
- /* If we don't have the test we don't need the sysfs file */
- if (pdata->test) {
- r = device_create_file(&client->dev, &pn544_attr);
- if (r) {
- dev_err(&client->dev,
- "sysfs registration failed, error %d\n", r);
- goto err_irq;
- }
- }
-
- info->miscdev.minor = MISC_DYNAMIC_MINOR;
- info->miscdev.name = PN544_DRIVER_NAME;
- info->miscdev.fops = &pn544_fops;
- info->miscdev.parent = &client->dev;
- r = misc_register(&info->miscdev);
- if (r < 0) {
- dev_err(&client->dev, "Device registration failed\n");
- goto err_sysfs;
- }
-
- dev_dbg(&client->dev, "%s: info: %p, pdata %p, client %p\n",
- __func__, info, pdata, client);
-
- return 0;
-
-err_sysfs:
- if (pdata->test)
- device_remove_file(&client->dev, &pn544_attr);
-err_irq:
- free_irq(client->irq, info);
-err_res:
- if (pdata->free_resources)
- pdata->free_resources();
-err_reg:
- regulator_bulk_free(ARRAY_SIZE(info->regs), info->regs);
-err_kmalloc:
- kfree(info->buf);
-err_buf_alloc:
- kfree(info);
-err_info_alloc:
- return r;
-}
-
-static __devexit int pn544_remove(struct i2c_client *client)
-{
- struct pn544_info *info = i2c_get_clientdata(client);
- struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
-
- dev_dbg(&client->dev, "%s\n", __func__);
-
- misc_deregister(&info->miscdev);
- if (pdata->test)
- device_remove_file(&client->dev, &pn544_attr);
-
- if (info->state != PN544_ST_COLD) {
- if (pdata->disable)
- pdata->disable();
-
- info->read_irq = PN544_NONE;
- }
-
- free_irq(client->irq, info);
- if (pdata->free_resources)
- pdata->free_resources();
-
- regulator_bulk_free(ARRAY_SIZE(info->regs), info->regs);
- kfree(info->buf);
- kfree(info);
-
- return 0;
-}
-
-static struct i2c_driver pn544_driver = {
- .driver = {
- .name = PN544_DRIVER_NAME,
-#ifdef CONFIG_PM
- .pm = &pn544_pm_ops,
-#endif
- },
- .probe = pn544_probe,
- .id_table = pn544_id_table,
- .remove = __devexit_p(pn544_remove),
-};
-
-static int __init pn544_init(void)
-{
- int r;
-
- pr_debug(DRIVER_DESC ": %s\n", __func__);
-
- r = i2c_add_driver(&pn544_driver);
- if (r) {
- pr_err(PN544_DRIVER_NAME ": driver registration failed\n");
- return r;
- }
-
- return 0;
-}
-
-static void __exit pn544_exit(void)
-{
- i2c_del_driver(&pn544_driver);
- pr_info(DRIVER_DESC ", Exiting.\n");
-}
-
-module_init(pn544_init);
-module_exit(pn544_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION(DRIVER_DESC);
--- /dev/null
+config NFC_PN544
+ tristate "NXP PN544 NFC driver"
+ depends on NFC_HCI
+ select CRC_CCITT
+ default n
+ ---help---
+ NXP PN544 core driver.
+ This is a driver based on the HCI NFC kernel layers and
+ will thus not work with NXP libnfc library.
+
+ To compile this driver as a module, choose m here. The module will
+ be called pn544.
+ Say N if unsure.
+
+config NFC_PN544_I2C
+ tristate "NFC PN544 i2c support"
+ depends on NFC_PN544 && I2C && NFC_SHDLC
+ ---help---
+ This module adds support for the NXP pn544 i2c interface.
+ Select this if your platform is using the i2c bus.
+
+ If you choose to build a module, it'll be called pn544_i2c.
+ Say N if unsure.
\ No newline at end of file
# Makefile for PN544 HCI based NFC driver
#
-obj-$(CONFIG_PN544_HCI_NFC) += pn544_i2c.o
+pn544_i2c-objs = i2c.o
-pn544_i2c-y := pn544.o i2c.o
+obj-$(CONFIG_NFC_PN544) += pn544.o
+obj-$(CONFIG_NFC_PN544_I2C) += pn544_i2c.o
#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/nfc/pn544.h>
+#include <linux/platform_data/pn544.h>
#include <net/nfc/hci.h>
#include <net/nfc/llc.h>
return -ENODEV;
}
- phy = kzalloc(sizeof(struct pn544_i2c_phy), GFP_KERNEL);
+ phy = devm_kzalloc(&client->dev, sizeof(struct pn544_i2c_phy),
+ GFP_KERNEL);
if (!phy) {
dev_err(&client->dev,
"Cannot allocate memory for pn544 i2c phy.\n");
- r = -ENOMEM;
- goto err_phy_alloc;
+ return -ENOMEM;
}
phy->i2c_dev = client;
pdata = client->dev.platform_data;
if (pdata == NULL) {
dev_err(&client->dev, "No platform data\n");
- r = -EINVAL;
- goto err_pdata;
+ return -EINVAL;
}
if (pdata->request_resources == NULL) {
dev_err(&client->dev, "request_resources() missing\n");
- r = -EINVAL;
- goto err_pdata;
+ return -EINVAL;
}
r = pdata->request_resources(client);
if (r) {
dev_err(&client->dev, "Cannot get platform resources\n");
- goto err_pdata;
+ return r;
}
phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
if (pdata->free_resources != NULL)
pdata->free_resources();
-err_pdata:
- kfree(phy);
-
-err_phy_alloc:
return r;
}
if (pdata->free_resources)
pdata->free_resources();
- kfree(phy);
-
return 0;
}
.remove = __devexit_p(pn544_hci_i2c_remove),
};
-static int __init pn544_hci_i2c_init(void)
-{
- int r;
-
- pr_debug(DRIVER_DESC ": %s\n", __func__);
-
- r = i2c_add_driver(&pn544_hci_i2c_driver);
- if (r) {
- pr_err(PN544_HCI_I2C_DRIVER_NAME
- ": driver registration failed\n");
- return r;
- }
-
- return 0;
-}
-
-static void __exit pn544_hci_i2c_exit(void)
-{
- i2c_del_driver(&pn544_hci_i2c_driver);
-}
-
-module_init(pn544_hci_i2c_init);
-module_exit(pn544_hci_i2c_exit);
+module_i2c_driver(pn544_hci_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(DRIVER_DESC);
#include <linux/delay.h>
#include <linux/slab.h>
+#include <linux/module.h>
#include <linux/nfc.h>
#include <net/nfc/hci.h>
static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
+ int r;
+
/* Set default false for multiple information chaining */
*skb_push(skb, 1) = 0;
- return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
- PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
+ r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+ PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
+
+ kfree_skb(skb);
+
+ return r;
}
static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
return 0;
}
-static void pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate,
- u8 event, struct sk_buff *skb)
+/*
+ * Returns:
+ * <= 0: driver handled the event, skb consumed
+ * 1: driver does not handle the event, please do standard processing
+ */
+static int pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event,
+ struct sk_buff *skb)
{
struct sk_buff *rgb_skb = NULL;
- int r = 0;
+ int r;
pr_debug("hci event %d", event);
switch (event) {
case PN544_HCI_EVT_ACTIVATED:
- if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
- nfc_hci_target_discovered(hdev, gate);
- else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) {
+ if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) {
+ r = nfc_hci_target_discovered(hdev, gate);
+ } else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) {
r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ,
- &rgb_skb);
-
+ &rgb_skb);
if (r < 0)
goto exit;
- nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
- NFC_COMM_PASSIVE, rgb_skb->data,
- rgb_skb->len);
+ r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
+ NFC_COMM_PASSIVE, rgb_skb->data,
+ rgb_skb->len);
kfree_skb(rgb_skb);
+ } else {
+ r = -EINVAL;
}
-
break;
case PN544_HCI_EVT_DEACTIVATED:
- nfc_hci_send_event(hdev, gate,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
+ r = nfc_hci_send_event(hdev, gate, NFC_HCI_EVT_END_OPERATION,
+ NULL, 0);
break;
case PN544_HCI_EVT_RCV_DATA:
if (skb->len < 2) {
}
skb_pull(skb, 2);
- nfc_tm_data_received(hdev->ndev, skb);
-
- return;
+ return nfc_tm_data_received(hdev->ndev, skb);
default:
- break;
+ return 1;
}
exit:
kfree_skb(skb);
+
+ return r;
}
static struct nfc_hci_ops pn544_hci_ops = {
struct nfc_hci_dev **hdev)
{
struct pn544_hci_info *info;
- u32 protocols;
+ u32 protocols, se;
struct nfc_hci_init_data init_data;
int r;
NFC_PROTO_ISO14443_B_MASK |
NFC_PROTO_NFC_DEP_MASK;
- info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data,
- protocols, llc_name,
+ se = NFC_SE_UICC | NFC_SE_EMBEDDED;
+
+ info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data, 0,
+ protocols, se, llc_name,
phy_headroom + PN544_CMDS_HEADROOM,
phy_tailroom, phy_payload);
if (!info->hdev) {
err_info_alloc:
return r;
}
+EXPORT_SYMBOL(pn544_hci_probe);
void pn544_hci_remove(struct nfc_hci_dev *hdev)
{
nfc_hci_free_device(hdev);
kfree(info);
}
+EXPORT_SYMBOL(pn544_hci_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
#define sysfs_deprecated 0
#endif
+/**
+ * module_driver() - Helper macro for drivers that don't do anything
+ * special in module init/exit. This eliminates a lot of boilerplate.
+ * Each module may only use this macro once, and calling it replaces
+ * module_init() and module_exit().
+ *
+ * Use this macro to construct bus specific macros for registering
+ * drivers, and do not use it on its own.
+ */
+#define module_driver(__driver, __register, __unregister) \
+static int __init __driver##_init(void) \
+{ \
+ return __register(&(__driver)); \
+} \
+module_init(__driver##_init); \
+static void __exit __driver##_exit(void) \
+{ \
+ __unregister(&(__driver)); \
+} \
+module_exit(__driver##_exit);
+
#endif /* _DEVICE_H_ */
{
return adap->nr;
}
+
+/**
+ * module_i2c_driver() - Helper macro for registering a I2C driver
+ * @__i2c_driver: i2c_driver struct
+ *
+ * Helper macro for I2C drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_i2c_driver(__i2c_driver) \
+ module_driver(__i2c_driver, i2c_add_driver, \
+ i2c_del_driver)
+
#endif /* I2C */
#endif /* __KERNEL__ */
void ida_destroy(struct ida *ida);
void ida_init(struct ida *ida);
+int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
+ gfp_t gfp_mask);
+void ida_simple_remove(struct ida *ida, unsigned int id);
+
void __init idr_init_cache(void);
#endif /* __IDR_H__ */
* Lauro Ramos Venancio <lauro.venancio@openbossa.org>
* Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the
- * Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __LINUX_NFC_H
* target mode.
* @NFC_EVENT_DEVICE_DEACTIVATED: event emitted when the adapter is deactivated
* from target mode.
+ * @NFC_CMD_LLC_GET_PARAMS: request LTO, RW, and MIUX parameters for a device
+ * @NFC_CMD_LLC_SET_PARAMS: set one or more of LTO, RW, and MIUX parameters for
+ * a device. LTO must be set before the link is up otherwise -EINPROGRESS
+ * is returned. RW and MIUX can be set at anytime and will be passed in
+ * subsequent CONNECT and CC messages.
+ * If one of the passed parameters is wrong none is set and -EINVAL is
+ * returned.
+ * @NFC_CMD_ENABLE_SE: Enable the physical link to a specific secure element.
+ * Once enabled a secure element will handle card emulation mode, i.e.
+ * starting a poll from a device which has a secure element enabled means
+ * we want to do SE based card emulation.
+ * @NFC_CMD_DISABLE_SE: Disable the physical link to a specific secure element.
*/
enum nfc_commands {
NFC_CMD_UNSPEC,
NFC_EVENT_TARGET_LOST,
NFC_EVENT_TM_ACTIVATED,
NFC_EVENT_TM_DEACTIVATED,
+ NFC_CMD_LLC_GET_PARAMS,
+ NFC_CMD_LLC_SET_PARAMS,
+ NFC_CMD_ENABLE_SE,
+ NFC_CMD_DISABLE_SE,
+ NFC_CMD_LLC_SDREQ,
+ NFC_EVENT_LLC_SDRES,
/* private: internal use only */
__NFC_CMD_AFTER_LAST
};
* @NFC_ATTR_RF_MODE: Initiator or target
* @NFC_ATTR_IM_PROTOCOLS: Initiator mode protocols to poll for
* @NFC_ATTR_TM_PROTOCOLS: Target mode protocols to listen for
+ * @NFC_ATTR_LLC_PARAM_LTO: Link TimeOut parameter
+ * @NFC_ATTR_LLC_PARAM_RW: Receive Window size parameter
+ * @NFC_ATTR_LLC_PARAM_MIUX: MIU eXtension parameter
+ * @NFC_ATTR_SE: Available Secure Elements
*/
enum nfc_attrs {
NFC_ATTR_UNSPEC,
NFC_ATTR_DEVICE_POWERED,
NFC_ATTR_IM_PROTOCOLS,
NFC_ATTR_TM_PROTOCOLS,
+ NFC_ATTR_LLC_PARAM_LTO,
+ NFC_ATTR_LLC_PARAM_RW,
+ NFC_ATTR_LLC_PARAM_MIUX,
+ NFC_ATTR_SE,
+ NFC_ATTR_LLC_SDP,
/* private: internal use only */
__NFC_ATTR_AFTER_LAST
};
#define NFC_ATTR_MAX (__NFC_ATTR_AFTER_LAST - 1)
+enum nfc_sdp_attr {
+ NFC_SDP_ATTR_UNSPEC,
+ NFC_SDP_ATTR_URI,
+ NFC_SDP_ATTR_SAP,
+/* private: internal use only */
+ __NFC_SDP_ATTR_AFTER_LAST
+};
+#define NFC_SDP_ATTR_MAX (__NFC_SDP_ATTR_AFTER_LAST - 1)
+
#define NFC_DEVICE_NAME_MAXSIZE 8
#define NFC_NFCID1_MAXSIZE 10
#define NFC_SENSB_RES_MAXSIZE 12
#define NFC_PROTO_NFC_DEP_MASK (1 << NFC_PROTO_NFC_DEP)
#define NFC_PROTO_ISO14443_B_MASK (1 << NFC_PROTO_ISO14443_B)
+/* NFC Secure Elements */
+#define NFC_SE_NONE 0x0
+#define NFC_SE_UICC 0x1
+#define NFC_SE_EMBEDDED 0x2
+
struct sockaddr_nfc {
sa_family_t sa_family;
__u32 dev_idx;
#define NFC_LLCP_DIRECTION_RX 0x00
#define NFC_LLCP_DIRECTION_TX 0x01
+/* socket option names */
+#define NFC_LLCP_RW 0
+#define NFC_LLCP_MIUX 1
+#define NFC_LLCP_REMOTE_MIU 2
+#define NFC_LLCP_REMOTE_LTO 3
+#define NFC_LLCP_REMOTE_RW 4
+
#endif /*__LINUX_NFC_H */
+++ /dev/null
-/*
- * Driver include for the PN544 NFC chip.
- *
- * Copyright (C) Nokia Corporation
- *
- * Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
- * Contact: Matti Aaltoenn <matti.j.aaltonen@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef _PN544_H_
-#define _PN544_H_
-
-#include <linux/i2c.h>
-
-#define PN544_DRIVER_NAME "pn544"
-#define PN544_MAXWINDOW_SIZE 7
-#define PN544_WINDOW_SIZE 4
-#define PN544_RETRIES 10
-#define PN544_MAX_I2C_TRANSFER 0x0400
-#define PN544_MSG_MAX_SIZE 0x21 /* at normal HCI mode */
-
-/* ioctl */
-#define PN544_CHAR_BASE 'P'
-#define PN544_IOR(num, dtype) _IOR(PN544_CHAR_BASE, num, dtype)
-#define PN544_IOW(num, dtype) _IOW(PN544_CHAR_BASE, num, dtype)
-#define PN544_GET_FW_MODE PN544_IOW(1, unsigned int)
-#define PN544_SET_FW_MODE PN544_IOW(2, unsigned int)
-#define PN544_GET_DEBUG PN544_IOW(3, unsigned int)
-#define PN544_SET_DEBUG PN544_IOW(4, unsigned int)
-
-/* Timing restrictions (ms) */
-#define PN544_RESETVEN_TIME 30 /* 7 */
-#define PN544_PVDDVEN_TIME 0
-#define PN544_VBATVEN_TIME 0
-#define PN544_GPIO4VEN_TIME 0
-#define PN544_WAKEUP_ACK 5
-#define PN544_WAKEUP_GUARD (PN544_WAKEUP_ACK + 1)
-#define PN544_INACTIVITY_TIME 1000
-#define PN544_INTERFRAME_DELAY 200 /* us */
-#define PN544_BAUDRATE_CHANGE 150 /* us */
-
-/* Debug bits */
-#define PN544_DEBUG_BUF 0x01
-#define PN544_DEBUG_READ 0x02
-#define PN544_DEBUG_WRITE 0x04
-#define PN544_DEBUG_IRQ 0x08
-#define PN544_DEBUG_CALLS 0x10
-#define PN544_DEBUG_MODE 0x20
-
-/* Normal (HCI) mode */
-#define PN544_LLC_HCI_OVERHEAD 3 /* header + crc (to length) */
-#define PN544_LLC_MIN_SIZE (1 + PN544_LLC_HCI_OVERHEAD) /* length + */
-#define PN544_LLC_MAX_DATA (PN544_MSG_MAX_SIZE - 2)
-#define PN544_LLC_MAX_HCI_SIZE (PN544_LLC_MAX_DATA - 2)
-
-struct pn544_llc_packet {
- unsigned char length; /* of rest of packet */
- unsigned char header;
- unsigned char data[PN544_LLC_MAX_DATA]; /* includes crc-ccitt */
-};
-
-/* Firmware upgrade mode */
-#define PN544_FW_HEADER_SIZE 3
-/* max fw transfer is 1024bytes, but I2C limits it to 0xC0 */
-#define PN544_MAX_FW_DATA (PN544_MAX_I2C_TRANSFER - PN544_FW_HEADER_SIZE)
-
-struct pn544_fw_packet {
- unsigned char command; /* status in answer */
- unsigned char length[2]; /* big-endian order (msf) */
- unsigned char data[PN544_MAX_FW_DATA];
-};
-
-#ifdef __KERNEL__
-enum {
- NFC_GPIO_ENABLE,
- NFC_GPIO_FW_RESET,
- NFC_GPIO_IRQ
-};
-
-/* board config */
-struct pn544_nfc_platform_data {
- int (*request_resources) (struct i2c_client *client);
- void (*free_resources) (void);
- void (*enable) (int fw);
- int (*test) (void);
- void (*disable) (void);
- int (*get_gpio)(int type);
-};
-#endif /* __KERNEL__ */
-
-#endif /* _PN544_H_ */
--- /dev/null
+/*
+ * Driver include for the PN544 NFC chip.
+ *
+ * Copyright (C) 2011 Tieto Poland
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _MICROREAD_H
+#define _MICROREAD_H
+
+#include <linux/i2c.h>
+
+#define MICROREAD_DRIVER_NAME "microread"
+
+/* board config platform data for microread */
+struct microread_nfc_platform_data {
+ unsigned int rst_gpio;
+ unsigned int irq_gpio;
+ unsigned int ioh_gpio;
+};
+
+#endif /* _MICROREAD_H */
--- /dev/null
+/*
+ * Driver include for the PN544 NFC chip.
+ *
+ * Copyright (C) Nokia Corporation
+ *
+ * Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
+ * Contact: Matti Aaltoenn <matti.j.aaltonen@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _PN544_H_
+#define _PN544_H_
+
+#include <linux/i2c.h>
+
+enum {
+ NFC_GPIO_ENABLE,
+ NFC_GPIO_FW_RESET,
+ NFC_GPIO_IRQ
+};
+
+/* board config */
+struct pn544_nfc_platform_data {
+ int (*request_resources) (struct i2c_client *client);
+ void (*free_resources) (void);
+ void (*enable) (int fw);
+ int (*test) (void);
+ void (*disable) (void);
+ int (*get_gpio)(int type);
+};
+
+#endif /* _PN544_H_ */
#define SOL_IUCV 277
#define SOL_CAIF 278
#define SOL_ALG 279
+#define SOL_NFC 280
/* IPX options */
#define IPX_TYPE 1
int (*tm_send)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
int (*check_presence)(struct nfc_hci_dev *hdev,
struct nfc_target *target);
- void (*event_received)(struct nfc_hci_dev *hdev, u8 gate, u8 event,
- struct sk_buff *skb);
+ int (*event_received)(struct nfc_hci_dev *hdev, u8 gate, u8 event,
+ struct sk_buff *skb);
+ int (*enable_se)(struct nfc_dev *dev, u32 secure_element);
+ int (*disable_se)(struct nfc_dev *dev, u32 secure_element);
};
/* Pipes */
#define NFC_HCI_MAX_GATES 256
+/*
+ * These values can be specified by a driver to indicate it requires some
+ * adaptation of the HCI standard.
+ *
+ * NFC_HCI_QUIRK_SHORT_CLEAR - send HCI_ADM_CLEAR_ALL_PIPE cmd with no params
+ */
+enum {
+ NFC_HCI_QUIRK_SHORT_CLEAR = 0,
+};
+
struct nfc_hci_dev {
struct nfc_dev *ndev;
u32 max_data_link_payload;
+ bool shutting_down;
+
struct mutex msg_tx_mutex;
struct list_head msg_tx_queue;
u8 *gb;
size_t gb_len;
+
+ unsigned long quirks;
};
/* hci device allocation */
struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
struct nfc_hci_init_data *init_data,
+ unsigned long quirks,
u32 protocols,
+ u32 supported_se,
const char *llc_name,
int tx_headroom,
int tx_tailroom,
void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err);
+int nfc_hci_result_to_errno(u8 result);
+
/* Host IDs */
#define NFC_HCI_HOST_CONTROLLER_ID 0x00
#define NFC_HCI_TERMINAL_HOST_ID 0x01
int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
const u8 *param, size_t param_len);
int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate);
+u32 nfc_hci_sak_to_protocol(u8 sak);
#endif /* __NET_HCI_H */
/* ----- NCI Devices ----- */
struct nci_dev *nci_allocate_device(struct nci_ops *ops,
__u32 supported_protocols,
+ __u32 supported_se,
int tx_headroom,
int tx_tailroom);
void nci_free_device(struct nci_dev *ndev);
void *cb_context);
int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb);
int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
+ int (*enable_se)(struct nfc_dev *dev, u32 secure_element);
+ int (*disable_se)(struct nfc_dev *dev, u32 secure_element);
};
#define NFC_TARGET_IDX_ANY -1
};
struct nfc_dev {
- unsigned int idx;
+ int idx;
u32 target_next_idx;
struct nfc_target *targets;
int n_targets;
struct nfc_genl_data genl_data;
u32 supported_protocols;
+ u32 supported_se;
+ u32 active_se;
+
int tx_headroom;
int tx_tailroom;
struct timer_list check_pres_timer;
struct work_struct check_pres_work;
+ bool shutting_down;
+
struct nfc_ops *ops;
};
#define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
u32 supported_protocols,
+ u32 supported_se,
int tx_headroom,
int tx_tailroom);
#include <linux/err.h>
#include <linux/string.h>
#include <linux/idr.h>
+#include <linux/spinlock.h>
static struct kmem_cache *idr_layer_cache;
+static DEFINE_SPINLOCK(simple_ida_lock);
static struct idr_layer *get_from_free_list(struct idr *idp)
{
EXPORT_SYMBOL(ida_destroy);
/**
+ * ida_simple_get - get a new id.
+ * @ida: the (initialized) ida.
+ * @start: the minimum id (inclusive, < 0x8000000)
+ * @end: the maximum id (exclusive, < 0x8000000 or 0)
+ * @gfp_mask: memory allocation flags
+ *
+ * Allocates an id in the range start <= id < end, or returns -ENOSPC.
+ * On memory allocation failure, returns -ENOMEM.
+ *
+ * Use ida_simple_remove() to get rid of an id.
+ */
+int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
+ gfp_t gfp_mask)
+{
+ int ret, id;
+ unsigned int max;
+ unsigned long flags;
+
+ BUG_ON((int)start < 0);
+ BUG_ON((int)end < 0);
+
+ if (end == 0)
+ max = 0x80000000;
+ else {
+ BUG_ON(end < start);
+ max = end - 1;
+ }
+
+again:
+ if (!ida_pre_get(ida, gfp_mask))
+ return -ENOMEM;
+
+ spin_lock_irqsave(&simple_ida_lock, flags);
+ ret = ida_get_new_above(ida, start, &id);
+ if (!ret) {
+ if (id > max) {
+ ida_remove(ida, id);
+ ret = -ENOSPC;
+ } else {
+ ret = id;
+ }
+ }
+ spin_unlock_irqrestore(&simple_ida_lock, flags);
+
+ if (unlikely(ret == -EAGAIN))
+ goto again;
+
+ return ret;
+}
+EXPORT_SYMBOL(ida_simple_get);
+
+/**
+ * ida_simple_remove - remove an allocated id.
+ * @ida: the (initialized) ida.
+ * @id: the id returned by ida_simple_get.
+ */
+void ida_simple_remove(struct ida *ida, unsigned int id)
+{
+ unsigned long flags;
+
+ BUG_ON((int)id < 0);
+ spin_lock_irqsave(&simple_ida_lock, flags);
+ ida_remove(ida, id);
+ spin_unlock_irqrestore(&simple_ida_lock, flags);
+}
+EXPORT_SYMBOL(ida_simple_remove);
+
+/**
* ida_init - initialize ida handle
* @ida: ida handle
*
#
menuconfig NFC
- depends on NET && EXPERIMENTAL
- tristate "NFC subsystem support (EXPERIMENTAL)"
+ depends on NET
+ tristate "NFC subsystem support"
default n
help
Say Y here if you want to build support for NFC (Near field
int nfc_devlist_generation;
DEFINE_MUTEX(nfc_devlist_mutex);
+/* NFC device ID bitmap */
+static DEFINE_IDA(nfc_index_ida);
+
/**
* nfc_dev_up - turn on the NFC device
*
goto error;
}
+ if (!dev->dev_up) {
+ rc = -ENODEV;
+ goto error;
+ }
+
if (dev->polling) {
rc = -EBUSY;
goto error;
if (dev->n_targets == 0)
return NULL;
- for (i = 0; i < dev->n_targets ; i++) {
+ for (i = 0; i < dev->n_targets; i++) {
if (dev->targets[i].idx == target_idx)
return &dev->targets[i];
}
dev->active_target = target;
dev->rf_mode = NFC_RF_INITIATOR;
- if (dev->ops->check_presence)
+ if (dev->ops->check_presence && !dev->shutting_down)
mod_timer(&dev->check_pres_timer, jiffies +
msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
}
rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb,
cb_context);
- if (!rc && dev->ops->check_presence)
+ if (!rc && dev->ops->check_presence && !dev->shutting_down)
mod_timer(&dev->check_pres_timer, jiffies +
msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
} else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) {
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
- if (dev->ops->check_presence) {
- del_timer_sync(&dev->check_pres_timer);
- cancel_work_sync(&dev->check_pres_work);
- }
-
nfc_genl_data_exit(&dev->genl_data);
kfree(dev->targets);
kfree(dev);
rc = dev->ops->check_presence(dev, dev->active_target);
if (rc == -EOPNOTSUPP)
goto exit;
- if (!rc) {
- mod_timer(&dev->check_pres_timer, jiffies +
- msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
- } else {
+ if (rc) {
u32 active_target_idx = dev->active_target->idx;
device_unlock(&dev->dev);
nfc_target_lost(dev, active_target_idx);
return;
}
+
+ if (!dev->shutting_down)
+ mod_timer(&dev->check_pres_timer, jiffies +
+ msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
}
exit:
{
struct nfc_dev *dev = (struct nfc_dev *)data;
- queue_work(system_nrt_wq, &dev->check_pres_work);
+ schedule_work(&dev->check_pres_work);
}
struct class nfc_class = {
*/
struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
u32 supported_protocols,
+ u32 supported_se,
int tx_headroom, int tx_tailroom)
{
- static atomic_t dev_no = ATOMIC_INIT(0);
struct nfc_dev *dev;
if (!ops->start_poll || !ops->stop_poll || !ops->activate_target ||
if (!dev)
return NULL;
- dev->dev.class = &nfc_class;
- dev->idx = atomic_inc_return(&dev_no) - 1;
- dev_set_name(&dev->dev, "nfc%d", dev->idx);
- device_initialize(&dev->dev);
-
dev->ops = ops;
dev->supported_protocols = supported_protocols;
+ dev->supported_se = supported_se;
+ dev->active_se = NFC_SE_NONE;
dev->tx_headroom = tx_headroom;
dev->tx_tailroom = tx_tailroom;
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
+ dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL);
+ if (dev->idx < 0)
+ return dev->idx;
+
+ dev->dev.class = &nfc_class;
+ dev_set_name(&dev->dev, "nfc%d", dev->idx);
+ device_initialize(&dev->dev);
+
mutex_lock(&nfc_devlist_mutex);
nfc_devlist_generation++;
rc = device_add(&dev->dev);
*/
void nfc_unregister_device(struct nfc_dev *dev)
{
- int rc;
+ int rc, id;
pr_debug("dev_name=%s\n", dev_name(&dev->dev));
- mutex_lock(&nfc_devlist_mutex);
- nfc_devlist_generation++;
+ id = dev->idx;
- /* lock to avoid unregistering a device while an operation
- is in progress */
- device_lock(&dev->dev);
- device_del(&dev->dev);
- device_unlock(&dev->dev);
+ if (dev->ops->check_presence) {
+ device_lock(&dev->dev);
+ dev->shutting_down = true;
+ device_unlock(&dev->dev);
+ del_timer_sync(&dev->check_pres_timer);
+ cancel_work_sync(&dev->check_pres_work);
+ }
- mutex_unlock(&nfc_devlist_mutex);
+ rc = nfc_genl_device_removed(dev);
+ if (rc)
+ pr_debug("The userspace won't be notified that the device %s "
+ "was removed\n", dev_name(&dev->dev));
nfc_llcp_unregister_device(dev);
- rc = nfc_genl_device_removed(dev);
- if (rc)
- pr_debug("The userspace won't be notified that the device %s was removed\n",
- dev_name(&dev->dev));
+ mutex_lock(&nfc_devlist_mutex);
+ nfc_devlist_generation++;
+ device_del(&dev->dev);
+ mutex_unlock(&nfc_devlist_mutex);
+ ida_simple_remove(&nfc_index_ida, id);
}
EXPORT_SYMBOL(nfc_unregister_device);
static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
{
u8 param[2];
+ size_t param_len = 2;
/* TODO: Find out what the identity reference data is
* and fill param with it. HCI spec 6.1.3.5 */
pr_debug("\n");
+ if (test_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &hdev->quirks))
+ param_len = 0;
+
return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
- NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
+ NFC_HCI_ADM_CLEAR_ALL_PIPE, param, param_len,
+ NULL);
}
int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
return -EADDRINUSE;
if (pipe != NFC_HCI_INVALID_PIPE)
- goto pipe_is_open;
+ goto open_pipe;
switch (dest_gate) {
case NFC_HCI_LINK_MGMT_GATE:
break;
}
+open_pipe:
r = nfc_hci_open_pipe(hdev, pipe);
if (r < 0) {
if (pipe_created)
return r;
}
-pipe_is_open:
hdev->gate2pipe[dest_gate] = pipe;
return 0;
/* Largest headroom needed for outgoing HCI commands */
#define HCI_CMDS_HEADROOM 1
-static int nfc_hci_result_to_errno(u8 result)
+int nfc_hci_result_to_errno(u8 result)
{
switch (result) {
case NFC_HCI_ANY_OK:
return 0;
+ case NFC_HCI_ANY_E_REG_PAR_UNKNOWN:
+ return -EOPNOTSUPP;
case NFC_HCI_ANY_E_TIMEOUT:
return -ETIME;
default:
return -1;
}
}
+EXPORT_SYMBOL(nfc_hci_result_to_errno);
static void nfc_hci_msg_tx_work(struct work_struct *work)
{
int r = 0;
mutex_lock(&hdev->msg_tx_mutex);
+ if (hdev->shutting_down)
+ goto exit;
if (hdev->cmd_pending_msg) {
if (timer_pending(&hdev->cmd_timer) == 0) {
-ETIME);
kfree(hdev->cmd_pending_msg);
hdev->cmd_pending_msg = NULL;
- } else
+ } else {
goto exit;
+ }
}
next_msg:
kfree(hdev->cmd_pending_msg);
hdev->cmd_pending_msg = NULL;
- queue_work(system_nrt_wq, &hdev->msg_tx_work);
+ schedule_work(&hdev->msg_tx_work);
}
void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
kfree_skb(skb);
}
-static u32 nfc_hci_sak_to_protocol(u8 sak)
+u32 nfc_hci_sak_to_protocol(u8 sak)
{
switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) {
case NFC_HCI_TYPE_A_SEL_PROT_MIFARE:
return 0xffffffff;
}
}
+EXPORT_SYMBOL(nfc_hci_sak_to_protocol);
int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
{
struct sk_buff *skb)
{
int r = 0;
+ u8 gate = nfc_hci_pipe2gate(hdev, pipe);
+
+ if (gate == 0xff) {
+ pr_err("Discarded event %x to unopened pipe %x\n", event, pipe);
+ goto exit;
+ }
+
+ if (hdev->ops->event_received) {
+ r = hdev->ops->event_received(hdev, gate, event, skb);
+ if (r <= 0)
+ goto exit_noskb;
+ }
switch (event) {
case NFC_HCI_EVT_TARGET_DISCOVERED:
goto exit;
}
- r = nfc_hci_target_discovered(hdev,
- nfc_hci_pipe2gate(hdev, pipe));
+ r = nfc_hci_target_discovered(hdev, gate);
break;
default:
- if (hdev->ops->event_received) {
- hdev->ops->event_received(hdev,
- nfc_hci_pipe2gate(hdev, pipe),
- event, skb);
- return;
- }
-
+ pr_info("Discarded unknown event %x to gate %x\n", event, gate);
+ r = -EINVAL;
break;
}
exit:
kfree_skb(skb);
+exit_noskb:
if (r) {
/* TODO: There was an error dispatching the event,
* how to propagate up to nfc core?
{
struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
- queue_work(system_nrt_wq, &hdev->msg_tx_work);
+ schedule_work(&hdev->msg_tx_work);
}
static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
NFC_HCI_ID_MGMT_VERSION_SW, &skb);
+ if (r == -EOPNOTSUPP) {
+ pr_info("Software/Hardware info not available\n");
+ return 0;
+ }
if (r < 0)
return r;
return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
else
return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
- NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+ NFC_HCI_EVT_READER_REQUESTED,
+ NULL, 0);
}
static void hci_stop_poll(struct nfc_dev *nfc_dev)
cb_context);
if (r == 1)
r = -ENOTSUPP;
- }
- else
+ } else {
r = -ENOTSUPP;
+ }
break;
}
if (hdev->ops->tm_send)
return hdev->ops->tm_send(hdev, skb);
- else
- return -ENOTSUPP;
+
+ kfree_skb(skb);
+
+ return -ENOTSUPP;
}
static int hci_check_presence(struct nfc_dev *nfc_dev,
nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
} else {
skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
- queue_work(system_nrt_wq, &hdev->msg_rx_work);
+ schedule_work(&hdev->msg_rx_work);
}
}
struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
struct nfc_hci_init_data *init_data,
+ unsigned long quirks,
u32 protocols,
+ u32 supported_se,
const char *llc_name,
int tx_headroom,
int tx_tailroom,
return NULL;
}
- hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
+ hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, supported_se,
tx_headroom + HCI_CMDS_HEADROOM,
tx_tailroom);
if (!hdev->ndev) {
memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
+ hdev->quirks = quirks;
+
return hdev;
}
EXPORT_SYMBOL(nfc_hci_allocate_device);
{
struct hci_msg *msg, *n;
+ mutex_lock(&hdev->msg_tx_mutex);
+
+ if (hdev->cmd_pending_msg) {
+ if (hdev->cmd_pending_msg->cb)
+ hdev->cmd_pending_msg->cb(
+ hdev->cmd_pending_msg->cb_context,
+ NULL, -ESHUTDOWN);
+ kfree(hdev->cmd_pending_msg);
+ hdev->cmd_pending_msg = NULL;
+ }
+
+ hdev->shutting_down = true;
+
+ mutex_unlock(&hdev->msg_tx_mutex);
+
+ del_timer_sync(&hdev->cmd_timer);
+ cancel_work_sync(&hdev->msg_tx_work);
+
+ cancel_work_sync(&hdev->msg_rx_work);
+
+ nfc_unregister_device(hdev->ndev);
+
skb_queue_purge(&hdev->rx_hcp_frags);
skb_queue_purge(&hdev->msg_rx_queue);
skb_queue_purge(&msg->msg_frags);
kfree(msg);
}
-
- del_timer_sync(&hdev->cmd_timer);
-
- nfc_unregister_device(hdev->ndev);
-
- cancel_work_sync(&hdev->msg_tx_work);
- cancel_work_sync(&hdev->msg_rx_work);
}
EXPORT_SYMBOL(nfc_hci_unregister_device);
}
EXPORT_SYMBOL(nfc_hci_driver_failure);
-void inline nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
nfc_llc_rcv_from_drv(hdev->llc, skb);
}
}
mutex_lock(&hdev->msg_tx_mutex);
+
+ if (hdev->shutting_down) {
+ err = -ESHUTDOWN;
+ mutex_unlock(&hdev->msg_tx_mutex);
+ goto out_skb_err;
+ }
+
list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
mutex_unlock(&hdev->msg_tx_mutex);
- queue_work(system_nrt_wq, &hdev->msg_tx_work);
+ schedule_work(&hdev->msg_tx_work);
return 0;
llc_engine->ops = ops;
INIT_LIST_HEAD(&llc_engine->entry);
- list_add_tail (&llc_engine->entry, &llc_engines);
+ list_add_tail(&llc_engine->entry, &llc_engines);
return 0;
}
pr_debug("\n");
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
}
static void llc_shdlc_t1_timeout(unsigned long data)
pr_debug("SoftIRQ: need to send ack\n");
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
}
static void llc_shdlc_t2_timeout(unsigned long data)
pr_debug("SoftIRQ: need to retransmit\n");
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
}
static void llc_shdlc_sm_work(struct work_struct *work)
r = llc_shdlc_connect_initiate(shdlc);
else
r = -ETIME;
- if (r < 0)
+ if (r < 0) {
llc_shdlc_connect_complete(shdlc, r);
- else {
+ } else {
mod_timer(&shdlc->connect_timer, jiffies +
msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
case SHDLC_NEGOTIATING:
if (timer_pending(&shdlc->connect_timer) == 0) {
shdlc->state = SHDLC_CONNECTING;
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
}
llc_shdlc_handle_rcv_queue(shdlc);
llc_shdlc_handle_send_queue(shdlc);
}
- if (shdlc->hard_fault) {
+ if (shdlc->hard_fault)
shdlc->llc_failure(shdlc->hdev, shdlc->hard_fault);
- }
break;
default:
break;
mutex_unlock(&shdlc->state_mutex);
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
wait_event(connect_wq, shdlc->connect_result != 1);
mutex_unlock(&shdlc->state_mutex);
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
}
/*
skb_queue_tail(&shdlc->rcv_q, skb);
}
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
}
static void *llc_shdlc_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
skb_queue_tail(&shdlc->send_q, skb);
- queue_work(system_nrt_wq, &shdlc->sm_work);
+ schedule_work(&shdlc->sm_work);
return 0;
}
+++ /dev/null
-/*
- * Copyright (C) 2012 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the
- * Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define pr_fmt(fmt) "shdlc: %s: " fmt, __func__
-
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/crc-ccitt.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-
-#include <net/nfc/hci.h>
-#include <net/nfc/shdlc.h>
-
-#define SHDLC_LLC_HEAD_ROOM 2
-#define SHDLC_LLC_TAIL_ROOM 2
-
-#define SHDLC_MAX_WINDOW 4
-#define SHDLC_SREJ_SUPPORT false
-
-#define SHDLC_CONTROL_HEAD_MASK 0xe0
-#define SHDLC_CONTROL_HEAD_I 0x80
-#define SHDLC_CONTROL_HEAD_I2 0xa0
-#define SHDLC_CONTROL_HEAD_S 0xc0
-#define SHDLC_CONTROL_HEAD_U 0xe0
-
-#define SHDLC_CONTROL_NS_MASK 0x38
-#define SHDLC_CONTROL_NR_MASK 0x07
-#define SHDLC_CONTROL_TYPE_MASK 0x18
-
-#define SHDLC_CONTROL_M_MASK 0x1f
-
-enum sframe_type {
- S_FRAME_RR = 0x00,
- S_FRAME_REJ = 0x01,
- S_FRAME_RNR = 0x02,
- S_FRAME_SREJ = 0x03
-};
-
-enum uframe_modifier {
- U_FRAME_UA = 0x06,
- U_FRAME_RSET = 0x19
-};
-
-#define SHDLC_CONNECT_VALUE_MS 5
-#define SHDLC_T1_VALUE_MS(w) ((5 * w) / 4)
-#define SHDLC_T2_VALUE_MS 300
-
-#define SHDLC_DUMP_SKB(info, skb) \
-do { \
- pr_debug("%s:\n", info); \
- print_hex_dump(KERN_DEBUG, "shdlc: ", DUMP_PREFIX_OFFSET, \
- 16, 1, skb->data, skb->len, 0); \
-} while (0)
-
-/* checks x < y <= z modulo 8 */
-static bool nfc_shdlc_x_lt_y_lteq_z(int x, int y, int z)
-{
- if (x < z)
- return ((x < y) && (y <= z)) ? true : false;
- else
- return ((y > x) || (y <= z)) ? true : false;
-}
-
-/* checks x <= y < z modulo 8 */
-static bool nfc_shdlc_x_lteq_y_lt_z(int x, int y, int z)
-{
- if (x <= z)
- return ((x <= y) && (y < z)) ? true : false;
- else /* x > z -> z+8 > x */
- return ((y >= x) || (y < z)) ? true : false;
-}
-
-static struct sk_buff *nfc_shdlc_alloc_skb(struct nfc_shdlc *shdlc,
- int payload_len)
-{
- struct sk_buff *skb;
-
- skb = alloc_skb(shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM +
- shdlc->client_tailroom + SHDLC_LLC_TAIL_ROOM +
- payload_len, GFP_KERNEL);
- if (skb)
- skb_reserve(skb, shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM);
-
- return skb;
-}
-
-static void nfc_shdlc_add_len_crc(struct sk_buff *skb)
-{
- u16 crc;
- int len;
-
- len = skb->len + 2;
- *skb_push(skb, 1) = len;
-
- crc = crc_ccitt(0xffff, skb->data, skb->len);
- crc = ~crc;
- *skb_put(skb, 1) = crc & 0xff;
- *skb_put(skb, 1) = crc >> 8;
-}
-
-/* immediately sends an S frame. */
-static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc,
- enum sframe_type sframe_type, int nr)
-{
- int r;
- struct sk_buff *skb;
-
- pr_debug("sframe_type=%d nr=%d\n", sframe_type, nr);
-
- skb = nfc_shdlc_alloc_skb(shdlc, 0);
- if (skb == NULL)
- return -ENOMEM;
-
- *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_S | (sframe_type << 3) | nr;
-
- nfc_shdlc_add_len_crc(skb);
-
- r = shdlc->ops->xmit(shdlc, skb);
-
- kfree_skb(skb);
-
- return r;
-}
-
-/* immediately sends an U frame. skb may contain optional payload */
-static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc,
- struct sk_buff *skb,
- enum uframe_modifier uframe_modifier)
-{
- int r;
-
- pr_debug("uframe_modifier=%d\n", uframe_modifier);
-
- *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_U | uframe_modifier;
-
- nfc_shdlc_add_len_crc(skb);
-
- r = shdlc->ops->xmit(shdlc, skb);
-
- kfree_skb(skb);
-
- return r;
-}
-
-/*
- * Free ack_pending frames until y_nr - 1, and reset t2 according to
- * the remaining oldest ack_pending frame sent time
- */
-static void nfc_shdlc_reset_t2(struct nfc_shdlc *shdlc, int y_nr)
-{
- struct sk_buff *skb;
- int dnr = shdlc->dnr; /* MUST initially be < y_nr */
-
- pr_debug("release ack pending up to frame %d excluded\n", y_nr);
-
- while (dnr != y_nr) {
- pr_debug("release ack pending frame %d\n", dnr);
-
- skb = skb_dequeue(&shdlc->ack_pending_q);
- kfree_skb(skb);
-
- dnr = (dnr + 1) % 8;
- }
-
- if (skb_queue_empty(&shdlc->ack_pending_q)) {
- if (shdlc->t2_active) {
- del_timer_sync(&shdlc->t2_timer);
- shdlc->t2_active = false;
-
- pr_debug
- ("All sent frames acked. Stopped T2(retransmit)\n");
- }
- } else {
- skb = skb_peek(&shdlc->ack_pending_q);
-
- mod_timer(&shdlc->t2_timer, *(unsigned long *)skb->cb +
- msecs_to_jiffies(SHDLC_T2_VALUE_MS));
- shdlc->t2_active = true;
-
- pr_debug
- ("Start T2(retransmit) for remaining unacked sent frames\n");
- }
-}
-
-/*
- * Receive validated frames from lower layer. skb contains HCI payload only.
- * Handle according to algorithm at spec:10.8.2
- */
-static void nfc_shdlc_rcv_i_frame(struct nfc_shdlc *shdlc,
- struct sk_buff *skb, int ns, int nr)
-{
- int x_ns = ns;
- int y_nr = nr;
-
- pr_debug("recvd I-frame %d, remote waiting frame %d\n", ns, nr);
-
- if (shdlc->state != SHDLC_CONNECTED)
- goto exit;
-
- if (x_ns != shdlc->nr) {
- nfc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr);
- goto exit;
- }
-
- if (shdlc->t1_active == false) {
- shdlc->t1_active = true;
- mod_timer(&shdlc->t1_timer, jiffies +
- msecs_to_jiffies(SHDLC_T1_VALUE_MS(shdlc->w)));
- pr_debug("(re)Start T1(send ack)\n");
- }
-
- if (skb->len) {
- nfc_hci_recv_frame(shdlc->hdev, skb);
- skb = NULL;
- }
-
- shdlc->nr = (shdlc->nr + 1) % 8;
-
- if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
- nfc_shdlc_reset_t2(shdlc, y_nr);
-
- shdlc->dnr = y_nr;
- }
-
-exit:
- if (skb)
- kfree_skb(skb);
-}
-
-static void nfc_shdlc_rcv_ack(struct nfc_shdlc *shdlc, int y_nr)
-{
- pr_debug("remote acked up to frame %d excluded\n", y_nr);
-
- if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
- nfc_shdlc_reset_t2(shdlc, y_nr);
- shdlc->dnr = y_nr;
- }
-}
-
-static void nfc_shdlc_requeue_ack_pending(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
-
- pr_debug("ns reset to %d\n", shdlc->dnr);
-
- while ((skb = skb_dequeue_tail(&shdlc->ack_pending_q))) {
- skb_pull(skb, 2); /* remove len+control */
- skb_trim(skb, skb->len - 2); /* remove crc */
- skb_queue_head(&shdlc->send_q, skb);
- }
- shdlc->ns = shdlc->dnr;
-}
-
-static void nfc_shdlc_rcv_rej(struct nfc_shdlc *shdlc, int y_nr)
-{
- struct sk_buff *skb;
-
- pr_debug("remote asks retransmition from frame %d\n", y_nr);
-
- if (nfc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) {
- if (shdlc->t2_active) {
- del_timer_sync(&shdlc->t2_timer);
- shdlc->t2_active = false;
- pr_debug("Stopped T2(retransmit)\n");
- }
-
- if (shdlc->dnr != y_nr) {
- while ((shdlc->dnr = ((shdlc->dnr + 1) % 8)) != y_nr) {
- skb = skb_dequeue(&shdlc->ack_pending_q);
- kfree_skb(skb);
- }
- }
-
- nfc_shdlc_requeue_ack_pending(shdlc);
- }
-}
-
-/* See spec RR:10.8.3 REJ:10.8.4 */
-static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc,
- enum sframe_type s_frame_type, int nr)
-{
- struct sk_buff *skb;
-
- if (shdlc->state != SHDLC_CONNECTED)
- return;
-
- switch (s_frame_type) {
- case S_FRAME_RR:
- nfc_shdlc_rcv_ack(shdlc, nr);
- if (shdlc->rnr == true) { /* see SHDLC 10.7.7 */
- shdlc->rnr = false;
- if (shdlc->send_q.qlen == 0) {
- skb = nfc_shdlc_alloc_skb(shdlc, 0);
- if (skb)
- skb_queue_tail(&shdlc->send_q, skb);
- }
- }
- break;
- case S_FRAME_REJ:
- nfc_shdlc_rcv_rej(shdlc, nr);
- break;
- case S_FRAME_RNR:
- nfc_shdlc_rcv_ack(shdlc, nr);
- shdlc->rnr = true;
- break;
- default:
- break;
- }
-}
-
-static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r)
-{
- pr_debug("result=%d\n", r);
-
- del_timer_sync(&shdlc->connect_timer);
-
- if (r == 0) {
- shdlc->ns = 0;
- shdlc->nr = 0;
- shdlc->dnr = 0;
-
- shdlc->state = SHDLC_CONNECTED;
- } else {
- shdlc->state = SHDLC_DISCONNECTED;
- }
-
- shdlc->connect_result = r;
-
- wake_up(shdlc->connect_wq);
-}
-
-static int nfc_shdlc_connect_initiate(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
-
- pr_debug("\n");
-
- skb = nfc_shdlc_alloc_skb(shdlc, 2);
- if (skb == NULL)
- return -ENOMEM;
-
- *skb_put(skb, 1) = SHDLC_MAX_WINDOW;
- *skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
-
- return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
-}
-
-static int nfc_shdlc_connect_send_ua(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
-
- pr_debug("\n");
-
- skb = nfc_shdlc_alloc_skb(shdlc, 0);
- if (skb == NULL)
- return -ENOMEM;
-
- return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA);
-}
-
-static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc,
- struct sk_buff *skb,
- enum uframe_modifier u_frame_modifier)
-{
- u8 w = SHDLC_MAX_WINDOW;
- bool srej_support = SHDLC_SREJ_SUPPORT;
- int r;
-
- pr_debug("u_frame_modifier=%d\n", u_frame_modifier);
-
- switch (u_frame_modifier) {
- case U_FRAME_RSET:
- if (shdlc->state == SHDLC_NEGOCIATING) {
- /* we sent RSET, but chip wants to negociate */
- if (skb->len > 0)
- w = skb->data[0];
-
- if (skb->len > 1)
- srej_support = skb->data[1] & 0x01 ? true :
- false;
-
- if ((w <= SHDLC_MAX_WINDOW) &&
- (SHDLC_SREJ_SUPPORT || (srej_support == false))) {
- shdlc->w = w;
- shdlc->srej_support = srej_support;
- r = nfc_shdlc_connect_send_ua(shdlc);
- nfc_shdlc_connect_complete(shdlc, r);
- }
- } else if (shdlc->state == SHDLC_CONNECTED) {
- /*
- * Chip wants to reset link. This is unexpected and
- * unsupported.
- */
- shdlc->hard_fault = -ECONNRESET;
- }
- break;
- case U_FRAME_UA:
- if ((shdlc->state == SHDLC_CONNECTING &&
- shdlc->connect_tries > 0) ||
- (shdlc->state == SHDLC_NEGOCIATING))
- nfc_shdlc_connect_complete(shdlc, 0);
- break;
- default:
- break;
- }
-
- kfree_skb(skb);
-}
-
-static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
- u8 control;
- int nr;
- int ns;
- enum sframe_type s_frame_type;
- enum uframe_modifier u_frame_modifier;
-
- if (shdlc->rcv_q.qlen)
- pr_debug("rcvQlen=%d\n", shdlc->rcv_q.qlen);
-
- while ((skb = skb_dequeue(&shdlc->rcv_q)) != NULL) {
- control = skb->data[0];
- skb_pull(skb, 1);
- switch (control & SHDLC_CONTROL_HEAD_MASK) {
- case SHDLC_CONTROL_HEAD_I:
- case SHDLC_CONTROL_HEAD_I2:
- ns = (control & SHDLC_CONTROL_NS_MASK) >> 3;
- nr = control & SHDLC_CONTROL_NR_MASK;
- nfc_shdlc_rcv_i_frame(shdlc, skb, ns, nr);
- break;
- case SHDLC_CONTROL_HEAD_S:
- s_frame_type = (control & SHDLC_CONTROL_TYPE_MASK) >> 3;
- nr = control & SHDLC_CONTROL_NR_MASK;
- nfc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr);
- kfree_skb(skb);
- break;
- case SHDLC_CONTROL_HEAD_U:
- u_frame_modifier = control & SHDLC_CONTROL_M_MASK;
- nfc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier);
- break;
- default:
- pr_err("UNKNOWN Control=%d\n", control);
- kfree_skb(skb);
- break;
- }
- }
-}
-
-static int nfc_shdlc_w_used(int ns, int dnr)
-{
- int unack_count;
-
- if (dnr <= ns)
- unack_count = ns - dnr;
- else
- unack_count = 8 - dnr + ns;
-
- return unack_count;
-}
-
-/* Send frames according to algorithm at spec:10.8.1 */
-static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
- int r;
- unsigned long time_sent;
-
- if (shdlc->send_q.qlen)
- pr_debug
- ("sendQlen=%d ns=%d dnr=%d rnr=%s w_room=%d unackQlen=%d\n",
- shdlc->send_q.qlen, shdlc->ns, shdlc->dnr,
- shdlc->rnr == false ? "false" : "true",
- shdlc->w - nfc_shdlc_w_used(shdlc->ns, shdlc->dnr),
- shdlc->ack_pending_q.qlen);
-
- while (shdlc->send_q.qlen && shdlc->ack_pending_q.qlen < shdlc->w &&
- (shdlc->rnr == false)) {
-
- if (shdlc->t1_active) {
- del_timer_sync(&shdlc->t1_timer);
- shdlc->t1_active = false;
- pr_debug("Stopped T1(send ack)\n");
- }
-
- skb = skb_dequeue(&shdlc->send_q);
-
- *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_I | (shdlc->ns << 3) |
- shdlc->nr;
-
- pr_debug("Sending I-Frame %d, waiting to rcv %d\n", shdlc->ns,
- shdlc->nr);
- /* SHDLC_DUMP_SKB("shdlc frame written", skb); */
-
- nfc_shdlc_add_len_crc(skb);
-
- r = shdlc->ops->xmit(shdlc, skb);
- if (r < 0) {
- shdlc->hard_fault = r;
- break;
- }
-
- shdlc->ns = (shdlc->ns + 1) % 8;
-
- time_sent = jiffies;
- *(unsigned long *)skb->cb = time_sent;
-
- skb_queue_tail(&shdlc->ack_pending_q, skb);
-
- if (shdlc->t2_active == false) {
- shdlc->t2_active = true;
- mod_timer(&shdlc->t2_timer, time_sent +
- msecs_to_jiffies(SHDLC_T2_VALUE_MS));
- pr_debug("Started T2 (retransmit)\n");
- }
- }
-}
-
-static void nfc_shdlc_connect_timeout(unsigned long data)
-{
- struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
-
- pr_debug("\n");
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-static void nfc_shdlc_t1_timeout(unsigned long data)
-{
- struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
-
- pr_debug("SoftIRQ: need to send ack\n");
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-static void nfc_shdlc_t2_timeout(unsigned long data)
-{
- struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
-
- pr_debug("SoftIRQ: need to retransmit\n");
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-static void nfc_shdlc_sm_work(struct work_struct *work)
-{
- struct nfc_shdlc *shdlc = container_of(work, struct nfc_shdlc, sm_work);
- int r;
-
- pr_debug("\n");
-
- mutex_lock(&shdlc->state_mutex);
-
- switch (shdlc->state) {
- case SHDLC_DISCONNECTED:
- skb_queue_purge(&shdlc->rcv_q);
- skb_queue_purge(&shdlc->send_q);
- skb_queue_purge(&shdlc->ack_pending_q);
- break;
- case SHDLC_CONNECTING:
- if (shdlc->hard_fault) {
- nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
- break;
- }
-
- if (shdlc->connect_tries++ < 5)
- r = nfc_shdlc_connect_initiate(shdlc);
- else
- r = -ETIME;
- if (r < 0)
- nfc_shdlc_connect_complete(shdlc, r);
- else {
- mod_timer(&shdlc->connect_timer, jiffies +
- msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
-
- shdlc->state = SHDLC_NEGOCIATING;
- }
- break;
- case SHDLC_NEGOCIATING:
- if (timer_pending(&shdlc->connect_timer) == 0) {
- shdlc->state = SHDLC_CONNECTING;
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
- }
-
- nfc_shdlc_handle_rcv_queue(shdlc);
-
- if (shdlc->hard_fault) {
- nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
- break;
- }
- break;
- case SHDLC_CONNECTED:
- nfc_shdlc_handle_rcv_queue(shdlc);
- nfc_shdlc_handle_send_queue(shdlc);
-
- if (shdlc->t1_active && timer_pending(&shdlc->t1_timer) == 0) {
- pr_debug
- ("Handle T1(send ack) elapsed (T1 now inactive)\n");
-
- shdlc->t1_active = false;
- r = nfc_shdlc_send_s_frame(shdlc, S_FRAME_RR,
- shdlc->nr);
- if (r < 0)
- shdlc->hard_fault = r;
- }
-
- if (shdlc->t2_active && timer_pending(&shdlc->t2_timer) == 0) {
- pr_debug
- ("Handle T2(retransmit) elapsed (T2 inactive)\n");
-
- shdlc->t2_active = false;
-
- nfc_shdlc_requeue_ack_pending(shdlc);
- nfc_shdlc_handle_send_queue(shdlc);
- }
-
- if (shdlc->hard_fault) {
- nfc_hci_driver_failure(shdlc->hdev, shdlc->hard_fault);
- }
- break;
- default:
- break;
- }
- mutex_unlock(&shdlc->state_mutex);
-}
-
-/*
- * Called from syscall context to establish shdlc link. Sleeps until
- * link is ready or failure.
- */
-static int nfc_shdlc_connect(struct nfc_shdlc *shdlc)
-{
- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(connect_wq);
-
- pr_debug("\n");
-
- mutex_lock(&shdlc->state_mutex);
-
- shdlc->state = SHDLC_CONNECTING;
- shdlc->connect_wq = &connect_wq;
- shdlc->connect_tries = 0;
- shdlc->connect_result = 1;
-
- mutex_unlock(&shdlc->state_mutex);
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-
- wait_event(connect_wq, shdlc->connect_result != 1);
-
- return shdlc->connect_result;
-}
-
-static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc)
-{
- pr_debug("\n");
-
- mutex_lock(&shdlc->state_mutex);
-
- shdlc->state = SHDLC_DISCONNECTED;
-
- mutex_unlock(&shdlc->state_mutex);
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-/*
- * Receive an incoming shdlc frame. Frame has already been crc-validated.
- * skb contains only LLC header and payload.
- * If skb == NULL, it is a notification that the link below is dead.
- */
-void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb)
-{
- if (skb == NULL) {
- pr_err("NULL Frame -> link is dead\n");
- shdlc->hard_fault = -EREMOTEIO;
- } else {
- SHDLC_DUMP_SKB("incoming frame", skb);
- skb_queue_tail(&shdlc->rcv_q, skb);
- }
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-EXPORT_SYMBOL(nfc_shdlc_recv_frame);
-
-static int nfc_shdlc_open(struct nfc_hci_dev *hdev)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
- int r;
-
- pr_debug("\n");
-
- if (shdlc->ops->open) {
- r = shdlc->ops->open(shdlc);
- if (r < 0)
- return r;
- }
-
- r = nfc_shdlc_connect(shdlc);
- if (r < 0 && shdlc->ops->close)
- shdlc->ops->close(shdlc);
-
- return r;
-}
-
-static void nfc_shdlc_close(struct nfc_hci_dev *hdev)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- pr_debug("\n");
-
- nfc_shdlc_disconnect(shdlc);
-
- if (shdlc->ops->close)
- shdlc->ops->close(shdlc);
-}
-
-static int nfc_shdlc_hci_ready(struct nfc_hci_dev *hdev)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
- int r = 0;
-
- pr_debug("\n");
-
- if (shdlc->ops->hci_ready)
- r = shdlc->ops->hci_ready(shdlc);
-
- return r;
-}
-
-static int nfc_shdlc_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- SHDLC_DUMP_SKB("queuing HCP packet to shdlc", skb);
-
- skb_queue_tail(&shdlc->send_q, skb);
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-
- return 0;
-}
-
-static int nfc_shdlc_start_poll(struct nfc_hci_dev *hdev,
- u32 im_protocols, u32 tm_protocols)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- pr_debug("\n");
-
- if (shdlc->ops->start_poll)
- return shdlc->ops->start_poll(shdlc,
- im_protocols, tm_protocols);
-
- return 0;
-}
-
-static int nfc_shdlc_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
- struct nfc_target *target)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- if (shdlc->ops->target_from_gate)
- return shdlc->ops->target_from_gate(shdlc, gate, target);
-
- return -EPERM;
-}
-
-static int nfc_shdlc_complete_target_discovered(struct nfc_hci_dev *hdev,
- u8 gate,
- struct nfc_target *target)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- pr_debug("\n");
-
- if (shdlc->ops->complete_target_discovered)
- return shdlc->ops->complete_target_discovered(shdlc, gate,
- target);
-
- return 0;
-}
-
-static int nfc_shdlc_data_exchange(struct nfc_hci_dev *hdev,
- struct nfc_target *target,
- struct sk_buff *skb,
- struct sk_buff **res_skb)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- if (shdlc->ops->data_exchange)
- return shdlc->ops->data_exchange(shdlc, target, skb, res_skb);
-
- return -EPERM;
-}
-
-static int nfc_shdlc_check_presence(struct nfc_hci_dev *hdev,
- struct nfc_target *target)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- if (shdlc->ops->check_presence)
- return shdlc->ops->check_presence(shdlc, target);
-
- return 0;
-}
-
-static struct nfc_hci_ops shdlc_ops = {
- .open = nfc_shdlc_open,
- .close = nfc_shdlc_close,
- .hci_ready = nfc_shdlc_hci_ready,
- .xmit = nfc_shdlc_xmit,
- .start_poll = nfc_shdlc_start_poll,
- .target_from_gate = nfc_shdlc_target_from_gate,
- .complete_target_discovered = nfc_shdlc_complete_target_discovered,
- .data_exchange = nfc_shdlc_data_exchange,
- .check_presence = nfc_shdlc_check_presence,
-};
-
-struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops,
- struct nfc_hci_init_data *init_data,
- u32 protocols,
- int tx_headroom, int tx_tailroom,
- int max_link_payload, const char *devname)
-{
- struct nfc_shdlc *shdlc;
- int r;
- char name[32];
-
- if (ops->xmit == NULL)
- return NULL;
-
- shdlc = kzalloc(sizeof(struct nfc_shdlc), GFP_KERNEL);
- if (shdlc == NULL)
- return NULL;
-
- mutex_init(&shdlc->state_mutex);
- shdlc->ops = ops;
- shdlc->state = SHDLC_DISCONNECTED;
-
- init_timer(&shdlc->connect_timer);
- shdlc->connect_timer.data = (unsigned long)shdlc;
- shdlc->connect_timer.function = nfc_shdlc_connect_timeout;
-
- init_timer(&shdlc->t1_timer);
- shdlc->t1_timer.data = (unsigned long)shdlc;
- shdlc->t1_timer.function = nfc_shdlc_t1_timeout;
-
- init_timer(&shdlc->t2_timer);
- shdlc->t2_timer.data = (unsigned long)shdlc;
- shdlc->t2_timer.function = nfc_shdlc_t2_timeout;
-
- shdlc->w = SHDLC_MAX_WINDOW;
- shdlc->srej_support = SHDLC_SREJ_SUPPORT;
-
- skb_queue_head_init(&shdlc->rcv_q);
- skb_queue_head_init(&shdlc->send_q);
- skb_queue_head_init(&shdlc->ack_pending_q);
-
- INIT_WORK(&shdlc->sm_work, nfc_shdlc_sm_work);
- snprintf(name, sizeof(name), "%s_shdlc_sm_wq", devname);
- shdlc->sm_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1);
- if (shdlc->sm_wq == NULL)
- goto err_allocwq;
-
- shdlc->client_headroom = tx_headroom;
- shdlc->client_tailroom = tx_tailroom;
-
- shdlc->hdev = nfc_hci_allocate_device(&shdlc_ops, init_data, protocols,
- tx_headroom + SHDLC_LLC_HEAD_ROOM,
- tx_tailroom + SHDLC_LLC_TAIL_ROOM,
- max_link_payload);
- if (shdlc->hdev == NULL)
- goto err_allocdev;
-
- nfc_hci_set_clientdata(shdlc->hdev, shdlc);
-
- r = nfc_hci_register_device(shdlc->hdev);
- if (r < 0)
- goto err_regdev;
-
- return shdlc;
-
-err_regdev:
- nfc_hci_free_device(shdlc->hdev);
-
-err_allocdev:
- destroy_workqueue(shdlc->sm_wq);
-
-err_allocwq:
- kfree(shdlc);
-
- return NULL;
-}
-EXPORT_SYMBOL(nfc_shdlc_allocate);
-
-void nfc_shdlc_free(struct nfc_shdlc *shdlc)
-{
- pr_debug("\n");
-
- nfc_hci_unregister_device(shdlc->hdev);
- nfc_hci_free_device(shdlc->hdev);
-
- destroy_workqueue(shdlc->sm_wq);
-
- skb_queue_purge(&shdlc->rcv_q);
- skb_queue_purge(&shdlc->send_q);
- skb_queue_purge(&shdlc->ack_pending_q);
-
- kfree(shdlc);
-}
-EXPORT_SYMBOL(nfc_shdlc_free);
-
-void nfc_shdlc_set_clientdata(struct nfc_shdlc *shdlc, void *clientdata)
-{
- pr_debug("\n");
-
- shdlc->clientdata = clientdata;
-}
-EXPORT_SYMBOL(nfc_shdlc_set_clientdata);
-
-void *nfc_shdlc_get_clientdata(struct nfc_shdlc *shdlc)
-{
- return shdlc->clientdata;
-}
-EXPORT_SYMBOL(nfc_shdlc_get_clientdata);
-
-struct nfc_hci_dev *nfc_shdlc_get_hci_dev(struct nfc_shdlc *shdlc)
-{
- return shdlc->hdev;
-}
-EXPORT_SYMBOL(nfc_shdlc_get_hci_dev);
config NFC_LLCP
- depends on NFC && EXPERIMENTAL
- bool "NFC LLCP support (EXPERIMENTAL)"
+ depends on NFC
+ bool "NFC LLCP support"
default n
help
Say Y here if you want to build support for a kernel NFC LLCP
return tlv;
}
+struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap)
+{
+ struct nfc_llcp_sdp_tlv *sdres;
+ u8 value[2];
+
+ sdres = kzalloc(sizeof(struct nfc_llcp_sdp_tlv), GFP_KERNEL);
+ if (sdres == NULL)
+ return NULL;
+
+ value[0] = tid;
+ value[1] = sap;
+
+ sdres->tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, value, 2,
+ &sdres->tlv_len);
+ if (sdres->tlv == NULL) {
+ kfree(sdres);
+ return NULL;
+ }
+
+ sdres->tid = tid;
+ sdres->sap = sap;
+
+ INIT_HLIST_NODE(&sdres->node);
+
+ return sdres;
+}
+
+struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri,
+ size_t uri_len)
+{
+ struct nfc_llcp_sdp_tlv *sdreq;
+
+ pr_debug("uri: %s, len: %zu\n", uri, uri_len);
+
+ sdreq = kzalloc(sizeof(struct nfc_llcp_sdp_tlv), GFP_KERNEL);
+ if (sdreq == NULL)
+ return NULL;
+
+ sdreq->tlv_len = uri_len + 3;
+
+ if (uri[uri_len - 1] == 0)
+ sdreq->tlv_len--;
+
+ sdreq->tlv = kzalloc(sdreq->tlv_len + 1, GFP_KERNEL);
+ if (sdreq->tlv == NULL) {
+ kfree(sdreq);
+ return NULL;
+ }
+
+ sdreq->tlv[0] = LLCP_TLV_SDREQ;
+ sdreq->tlv[1] = sdreq->tlv_len - 2;
+ sdreq->tlv[2] = tid;
+
+ sdreq->tid = tid;
+ sdreq->uri = sdreq->tlv + 3;
+ memcpy(sdreq->uri, uri, uri_len);
+
+ sdreq->time = jiffies;
+
+ INIT_HLIST_NODE(&sdreq->node);
+
+ return sdreq;
+}
+
+void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp)
+{
+ kfree(sdp->tlv);
+ kfree(sdp);
+}
+
+void nfc_llcp_free_sdp_tlv_list(struct hlist_head *head)
+{
+ struct nfc_llcp_sdp_tlv *sdp;
+ struct hlist_node *n;
+
+ hlist_for_each_entry_safe(sdp, n, head, node) {
+ hlist_del(&sdp->node);
+
+ nfc_llcp_free_sdp_tlv(sdp);
+ }
+}
+
int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
u8 *tlv_array, u16 tlv_array_len)
{
switch (type) {
case LLCP_TLV_MIUX:
- sock->miu = llcp_tlv_miux(tlv) + 128;
+ sock->remote_miu = llcp_tlv_miux(tlv) + 128;
break;
case LLCP_TLV_RW:
- sock->rw = llcp_tlv_rw(tlv);
+ sock->remote_rw = llcp_tlv_rw(tlv);
break;
case LLCP_TLV_SN:
break;
tlv += length + 2;
}
- pr_debug("sock %p rw %d miu %d\n", sock, sock->rw, sock->miu);
+ pr_debug("sock %p rw %d miu %d\n", sock,
+ sock->remote_rw, sock->remote_miu);
return 0;
}
skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
+ __net_timestamp(skb);
+
nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
return nfc_data_exchange(dev, local->target_idx, skb,
u8 *service_name_tlv = NULL, service_name_tlv_length;
u8 *miux_tlv = NULL, miux_tlv_length;
u8 *rw_tlv = NULL, rw_tlv_length, rw;
- __be16 miux;
int err;
- u16 size = 0;
+ u16 size = 0, miux;
pr_debug("Sending CONNECT\n");
size += service_name_tlv_length;
}
- miux = cpu_to_be16(LLCP_MAX_MIUX);
+ /* If the socket parameters are not set, use the local ones */
+ miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
+ local->miux : sock->miux;
+ rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
+
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
&miux_tlv_length);
size += miux_tlv_length;
- rw = LLCP_MAX_RW;
rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
size += rw_tlv_length;
struct sk_buff *skb;
u8 *miux_tlv = NULL, miux_tlv_length;
u8 *rw_tlv = NULL, rw_tlv_length, rw;
- __be16 miux;
int err;
- u16 size = 0;
+ u16 size = 0, miux;
pr_debug("Sending CC\n");
if (local == NULL)
return -ENODEV;
- miux = cpu_to_be16(LLCP_MAX_MIUX);
+ /* If the socket parameters are not set, use the local ones */
+ miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
+ local->miux : sock->miux;
+ rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
+
miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
&miux_tlv_length);
size += miux_tlv_length;
- rw = LLCP_MAX_RW;
rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
size += rw_tlv_length;
return err;
}
-int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap)
+static struct sk_buff *nfc_llcp_allocate_snl(struct nfc_llcp_local *local,
+ size_t tlv_length)
{
struct sk_buff *skb;
struct nfc_dev *dev;
- u8 *sdres_tlv = NULL, sdres_tlv_length, sdres[2];
u16 size = 0;
- pr_debug("Sending SNL tid 0x%x sap 0x%x\n", tid, sap);
-
if (local == NULL)
- return -ENODEV;
+ return ERR_PTR(-ENODEV);
dev = local->dev;
if (dev == NULL)
- return -ENODEV;
-
- sdres[0] = tid;
- sdres[1] = sap;
- sdres_tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, sdres, 0,
- &sdres_tlv_length);
- if (sdres_tlv == NULL)
- return -ENOMEM;
+ return ERR_PTR(-ENODEV);
size += LLCP_HEADER_SIZE;
size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
- size += sdres_tlv_length;
+ size += tlv_length;
skb = alloc_skb(size, GFP_KERNEL);
- if (skb == NULL) {
- kfree(sdres_tlv);
- return -ENOMEM;
- }
+ if (skb == NULL)
+ return ERR_PTR(-ENOMEM);
skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
skb = llcp_add_header(skb, LLCP_SAP_SDP, LLCP_SAP_SDP, LLCP_PDU_SNL);
- memcpy(skb_put(skb, sdres_tlv_length), sdres_tlv, sdres_tlv_length);
+ return skb;
+}
+
+int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
+ struct hlist_head *tlv_list, size_t tlvs_len)
+{
+ struct nfc_llcp_sdp_tlv *sdp;
+ struct hlist_node *n;
+ struct sk_buff *skb;
+
+ skb = nfc_llcp_allocate_snl(local, tlvs_len);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ hlist_for_each_entry_safe(sdp, n, tlv_list, node) {
+ memcpy(skb_put(skb, sdp->tlv_len), sdp->tlv, sdp->tlv_len);
+
+ hlist_del(&sdp->node);
+
+ nfc_llcp_free_sdp_tlv(sdp);
+ }
skb_queue_tail(&local->tx_queue, skb);
- kfree(sdres_tlv);
+ return 0;
+}
+
+int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
+ struct hlist_head *tlv_list, size_t tlvs_len)
+{
+ struct nfc_llcp_sdp_tlv *sdreq;
+ struct hlist_node *n;
+ struct sk_buff *skb;
+
+ skb = nfc_llcp_allocate_snl(local, tlvs_len);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ mutex_lock(&local->sdreq_lock);
+
+ if (hlist_empty(&local->pending_sdreqs))
+ mod_timer(&local->sdreq_timer,
+ jiffies + msecs_to_jiffies(3 * local->remote_lto));
+
+ hlist_for_each_entry_safe(sdreq, n, tlv_list, node) {
+ pr_debug("tid %d for %s\n", sdreq->tid, sdreq->uri);
+
+ memcpy(skb_put(skb, sdreq->tlv_len), sdreq->tlv,
+ sdreq->tlv_len);
+
+ hlist_del(&sdreq->node);
+
+ hlist_add_head(&sdreq->node, &local->pending_sdreqs);
+ }
+
+ mutex_unlock(&local->sdreq_lock);
+
+ skb_queue_tail(&local->tx_queue, skb);
return 0;
}
struct nfc_llcp_local *local;
size_t frag_len = 0, remaining_len;
u8 *msg_data, *msg_ptr;
+ u16 remote_miu;
pr_debug("Send I frame len %zd\n", len);
if (local == NULL)
return -ENODEV;
+ /* Remote is ready but has not acknowledged our frames */
+ if((sock->remote_ready &&
+ skb_queue_len(&sock->tx_pending_queue) >= sock->remote_rw &&
+ skb_queue_len(&sock->tx_queue) >= 2 * sock->remote_rw)) {
+ pr_err("Pending queue is full %d frames\n",
+ skb_queue_len(&sock->tx_pending_queue));
+ return -ENOBUFS;
+ }
+
+ /* Remote is not ready and we've been queueing enough frames */
+ if ((!sock->remote_ready &&
+ skb_queue_len(&sock->tx_queue) >= 2 * sock->remote_rw)) {
+ pr_err("Tx queue is full %d frames\n",
+ skb_queue_len(&sock->tx_queue));
+ return -ENOBUFS;
+ }
+
msg_data = kzalloc(len, GFP_KERNEL);
if (msg_data == NULL)
return -ENOMEM;
remaining_len = len;
msg_ptr = msg_data;
- while (remaining_len > 0) {
+ do {
+ remote_miu = sock->remote_miu > LLCP_MAX_MIU ?
+ local->remote_miu : sock->remote_miu;
- frag_len = min_t(size_t, sock->miu, remaining_len);
+ frag_len = min_t(size_t, remote_miu, remaining_len);
pr_debug("Fragment %zd bytes remaining %zd",
frag_len, remaining_len);
skb_put(pdu, LLCP_SEQUENCE_SIZE);
- memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+ if (likely(frag_len > 0))
+ memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
skb_queue_tail(&sock->tx_queue, pdu);
remaining_len -= frag_len;
msg_ptr += frag_len;
- }
+ } while (remaining_len > 0);
kfree(msg_data);
struct sk_buff *pdu;
struct nfc_llcp_local *local;
size_t frag_len = 0, remaining_len;
- u8 *msg_ptr;
+ u8 *msg_ptr, *msg_data;
+ u16 remote_miu;
int err;
pr_debug("Send UI frame len %zd\n", len);
if (local == NULL)
return -ENODEV;
+ msg_data = kzalloc(len, GFP_KERNEL);
+ if (msg_data == NULL)
+ return -ENOMEM;
+
+ if (memcpy_fromiovec(msg_data, msg->msg_iov, len)) {
+ kfree(msg_data);
+ return -EFAULT;
+ }
+
remaining_len = len;
- msg_ptr = (u8 *) msg->msg_iov;
+ msg_ptr = msg_data;
- while (remaining_len > 0) {
+ do {
+ remote_miu = sock->remote_miu > LLCP_MAX_MIU ?
+ local->remote_miu : sock->remote_miu;
- frag_len = min_t(size_t, sock->miu, remaining_len);
+ frag_len = min_t(size_t, remote_miu, remaining_len);
pr_debug("Fragment %zd bytes remaining %zd",
frag_len, remaining_len);
pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
- memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+ if (likely(frag_len > 0))
+ memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
/* No need to check for the peer RW for UI frames */
skb_queue_tail(&local->tx_queue, pdu);
remaining_len -= frag_len;
msg_ptr += frag_len;
- }
+ } while (remaining_len > 0);
+
+ kfree(msg_data);
return len;
}
static struct list_head llcp_devices;
+static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb);
+
void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk)
{
write_lock(&l->lock);
write_unlock(&l->lock);
}
-static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
+void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock)
+{
+ sock->remote_rw = LLCP_DEFAULT_RW;
+ sock->remote_miu = LLCP_MAX_MIU + 1;
+}
+
+static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
+{
+ struct nfc_llcp_local *local = sock->local;
+ struct sk_buff *s, *tmp;
+
+ pr_debug("%p\n", &sock->sk);
+
+ skb_queue_purge(&sock->tx_queue);
+ skb_queue_purge(&sock->tx_pending_queue);
+
+ if (local == NULL)
+ return;
+
+ /* Search for local pending SKBs that are related to this socket */
+ skb_queue_walk_safe(&local->tx_queue, s, tmp) {
+ if (s->sk != &sock->sk)
+ continue;
+
+ skb_unlink(s, &local->tx_queue);
+ kfree_skb(s);
+ }
+}
+
+static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool device,
+ int err)
{
struct sock *sk;
struct hlist_node *node, *tmp;
struct nfc_llcp_sock *llcp_sock;
+ skb_queue_purge(&local->tx_queue);
+
write_lock(&local->sockets.lock);
sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
bh_lock_sock(sk);
+ nfc_llcp_socket_purge(llcp_sock);
+
if (sk->sk_state == LLCP_CONNECTED)
nfc_put_device(llcp_sock->dev);
struct nfc_llcp_sock *lsk, *n;
struct sock *accept_sk;
- list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
+ list_for_each_entry_safe(lsk, n,
+ &llcp_sock->accept_queue,
accept_queue) {
accept_sk = &lsk->sk;
bh_lock_sock(accept_sk);
nfc_llcp_accept_unlink(accept_sk);
+ if (err)
+ accept_sk->sk_err = err;
accept_sk->sk_state = LLCP_CLOSED;
+ accept_sk->sk_state_change(sk);
bh_unlock_sock(accept_sk);
-
- sock_orphan(accept_sk);
}
-
- if (listen == true) {
- bh_unlock_sock(sk);
- continue;
- }
- }
-
- /*
- * If we have a connection less socket bound, we keep it alive
- * if the device is still present.
- */
- if (sk->sk_state == LLCP_BOUND && sk->sk_type == SOCK_DGRAM &&
- listen == true) {
- bh_unlock_sock(sk);
- continue;
}
+ if (err)
+ sk->sk_err = err;
sk->sk_state = LLCP_CLOSED;
+ sk->sk_state_change(sk);
bh_unlock_sock(sk);
- sock_orphan(sk);
-
sk_del_node_init(sk);
}
write_unlock(&local->sockets.lock);
+
+ /* If we still have a device, we keep the RAW sockets alive */
+ if (device == true)
+ return;
+
+ write_lock(&local->raw_sockets.lock);
+
+ sk_for_each_safe(sk, tmp, &local->raw_sockets.head) {
+ llcp_sock = nfc_llcp_sock(sk);
+
+ bh_lock_sock(sk);
+
+ nfc_llcp_socket_purge(llcp_sock);
+
+ if (err)
+ sk->sk_err = err;
+ sk->sk_state = LLCP_CLOSED;
+ sk->sk_state_change(sk);
+
+ bh_unlock_sock(sk);
+
+ sk_del_node_init(sk);
+ }
+
+ write_unlock(&local->raw_sockets.lock);
}
struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local)
return local;
}
-static void local_release(struct kref *ref)
+static void local_cleanup(struct nfc_llcp_local *local)
{
- struct nfc_llcp_local *local;
-
- local = container_of(ref, struct nfc_llcp_local, ref);
-
- list_del(&local->list);
- nfc_llcp_socket_release(local, false);
+ nfc_llcp_socket_release(local, false, ENXIO);
del_timer_sync(&local->link_timer);
skb_queue_purge(&local->tx_queue);
cancel_work_sync(&local->tx_work);
cancel_work_sync(&local->rx_work);
cancel_work_sync(&local->timeout_work);
kfree_skb(local->rx_pending);
+ del_timer_sync(&local->sdreq_timer);
+ cancel_work_sync(&local->sdreq_timeout_work);
+ nfc_llcp_free_sdp_tlv_list(&local->pending_sdreqs);
+}
+
+static void local_release(struct kref *ref)
+{
+ struct nfc_llcp_local *local;
+
+ local = container_of(ref, struct nfc_llcp_local, ref);
+
+ list_del(&local->list);
+ local_cleanup(local);
kfree(local);
}
pr_err("SYMM timeout\n");
- queue_work(system_nrt_wq, &local->timeout_work);
+ schedule_work(&local->timeout_work);
+}
+
+static void nfc_llcp_sdreq_timeout_work(struct work_struct *work)
+{
+ unsigned long time;
+ HLIST_HEAD(nl_sdres_list);
+ struct hlist_node *n;
+ struct nfc_llcp_sdp_tlv *sdp;
+ struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
+ sdreq_timeout_work);
+
+ mutex_lock(&local->sdreq_lock);
+
+ time = jiffies - msecs_to_jiffies(3 * local->remote_lto);
+
+ hlist_for_each_entry_safe(sdp, n, &local->pending_sdreqs, node) {
+ if (time_after(sdp->time, time))
+ continue;
+
+ sdp->sap = LLCP_SDP_UNBOUND;
+
+ hlist_del(&sdp->node);
+
+ hlist_add_head(&sdp->node, &nl_sdres_list);
+ }
+
+ if (!hlist_empty(&local->pending_sdreqs))
+ mod_timer(&local->sdreq_timer,
+ jiffies + msecs_to_jiffies(3 * local->remote_lto));
+
+ mutex_unlock(&local->sdreq_lock);
+
+ if (!hlist_empty(&nl_sdres_list))
+ nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list);
+}
+
+static void nfc_llcp_sdreq_timer(unsigned long data)
+{
+ struct nfc_llcp_local *local = (struct nfc_llcp_local *) data;
+
+ schedule_work(&local->sdreq_timeout_work);
}
struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
{
u8 *gb_cur, *version_tlv, version, version_length;
- u8 *lto_tlv, lto, lto_length;
+ u8 *lto_tlv, lto_length;
u8 *wks_tlv, wks_length;
u8 *miux_tlv, miux_length;
- __be16 miux;
u8 gb_len = 0;
int ret = 0;
1, &version_length);
gb_len += version_length;
- /* 1500 ms */
- lto = 150;
- lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, <o, 1, <o_length);
+ lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, <o_length);
gb_len += lto_length;
pr_debug("Local wks 0x%lx\n", local->local_wks);
&wks_length);
gb_len += wks_length;
- miux = cpu_to_be16(LLCP_MAX_MIUX);
- miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+ miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
&miux_length);
gb_len += miux_length;
pr_err("No LLCP device\n");
return -ENODEV;
}
+ if (gb_len < 3)
+ return -EINVAL;
memset(local->remote_gb, 0, NFC_MAX_GT_LEN);
memcpy(local->remote_gb, gb, gb_len);
local->remote_gb_len = gb_len;
- if (local->remote_gb == NULL || local->remote_gb_len == 0)
- return -ENODEV;
-
if (memcmp(local->remote_gb, llcp_magic, 3)) {
pr_err("MAC does not support LLCP\n");
return -EINVAL;
if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) {
nfc_llcp_send_symm(local->dev);
} else {
+ struct sk_buff *copy_skb = NULL;
+ u8 ptype = nfc_llcp_ptype(skb);
int ret;
pr_debug("Sending pending skb\n");
DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb->len, true);
+ if (ptype == LLCP_PDU_I)
+ copy_skb = skb_copy(skb, GFP_ATOMIC);
+
+ __net_timestamp(skb);
+
nfc_llcp_send_to_raw_sock(local, skb,
NFC_LLCP_DIRECTION_TX);
ret = nfc_data_exchange(local->dev, local->target_idx,
skb, nfc_llcp_recv, local);
- if (!ret && nfc_llcp_ptype(skb) == LLCP_PDU_I) {
- skb = skb_get(skb);
- skb_queue_tail(&llcp_sock->tx_pending_queue,
- skb);
+ if (ret) {
+ kfree_skb(copy_skb);
+ goto out;
}
+
+ if (ptype == LLCP_PDU_I && copy_skb)
+ skb_queue_tail(&llcp_sock->tx_pending_queue,
+ copy_skb);
}
} else {
nfc_llcp_send_symm(local->dev);
}
+out:
mod_timer(&local->link_timer,
jiffies + msecs_to_jiffies(2 * local->remote_lto));
}
ui_cb->dsap = dsap;
ui_cb->ssap = ssap;
- printk("%s %d %d\n", __func__, dsap, ssap);
-
pr_debug("%d %d\n", dsap, ssap);
/* We're looking for a bound socket, not a client one */
/* There is no sequence with UI frames */
skb_pull(skb, LLCP_HEADER_SIZE);
- if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
- pr_err("receive queue is full\n");
- skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+ if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+ /*
+ * UI frames will be freed from the socket layer, so we
+ * need to keep them alive until someone receives them.
+ */
+ skb_get(skb);
+ } else {
+ pr_err("Receive queue is full\n");
}
nfc_llcp_sock_put(llcp_sock);
new_sock = nfc_llcp_sock(new_sk);
new_sock->dev = local->dev;
new_sock->local = nfc_llcp_local_get(local);
- new_sock->miu = local->remote_miu;
+ new_sock->rw = sock->rw;
+ new_sock->miux = sock->miux;
+ new_sock->remote_miu = local->remote_miu;
new_sock->nfc_protocol = sock->nfc_protocol;
new_sock->dsap = ssap;
new_sock->target_idx = local->target_idx;
pr_debug("Remote ready %d tx queue len %d remote rw %d",
sock->remote_ready, skb_queue_len(&sock->tx_pending_queue),
- sock->rw);
+ sock->remote_rw);
/* Try to queue some I frames for transmission */
while (sock->remote_ready &&
- skb_queue_len(&sock->tx_pending_queue) < sock->rw) {
+ skb_queue_len(&sock->tx_pending_queue) < sock->remote_rw) {
struct sk_buff *pdu;
pdu = skb_dequeue(&sock->tx_queue);
pr_err("Received out of sequence I PDU\n");
skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE);
- if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
- pr_err("receive queue is full\n");
- skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+ if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+ /*
+ * I frames will be freed from the socket layer, so we
+ * need to keep them alive until someone receives them.
+ */
+ skb_get(skb);
+ } else {
+ pr_err("Receive queue is full\n");
}
}
/* Remove skbs from the pending queue */
if (llcp_sock->send_ack_n != nr) {
struct sk_buff *s, *tmp;
+ u8 n;
llcp_sock->send_ack_n = nr;
/* Remove and free all skbs until ns == nr */
skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) {
+ n = nfc_llcp_ns(s);
+
skb_unlink(s, &llcp_sock->tx_pending_queue);
kfree_skb(s);
- if (nfc_llcp_ns(s) == nr)
+ if (n == nr)
break;
}
dsap = nfc_llcp_dsap(skb);
ssap = nfc_llcp_ssap(skb);
+ if ((dsap == 0) && (ssap == 0)) {
+ pr_debug("Connection termination");
+ nfc_dep_link_down(local->dev);
+ return;
+ }
+
llcp_sock = nfc_llcp_sock_get(local, dsap, ssap);
if (llcp_sock == NULL) {
nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN);
sk = &llcp_sock->sk;
lock_sock(sk);
+
+ nfc_llcp_socket_purge(llcp_sock);
+
if (sk->sk_state == LLCP_CLOSED) {
release_sock(sk);
nfc_llcp_sock_put(llcp_sock);
u16 tlv_len, offset;
char *service_name;
size_t service_name_len;
+ struct nfc_llcp_sdp_tlv *sdp;
+ HLIST_HEAD(llc_sdres_list);
+ size_t sdres_tlvs_len;
+ HLIST_HEAD(nl_sdres_list);
dsap = nfc_llcp_dsap(skb);
ssap = nfc_llcp_ssap(skb);
tlv = &skb->data[LLCP_HEADER_SIZE];
tlv_len = skb->len - LLCP_HEADER_SIZE;
offset = 0;
+ sdres_tlvs_len = 0;
- while(offset < tlv_len) {
+ while (offset < tlv_len) {
type = tlv[0];
length = tlv[1];
!strncmp(service_name, "urn:nfc:sn:sdp",
service_name_len)) {
sap = 1;
- goto send_snl;
+ goto add_snl;
}
llcp_sock = nfc_llcp_sock_from_sn(local, service_name,
service_name_len);
if (!llcp_sock) {
sap = 0;
- goto send_snl;
+ goto add_snl;
}
/*
if (sap == LLCP_SAP_MAX) {
sap = 0;
- goto send_snl;
+ goto add_snl;
}
client_count =
pr_debug("%p %d\n", llcp_sock, sap);
- send_snl:
- nfc_llcp_send_snl(local, tid, sap);
+add_snl:
+ sdp = nfc_llcp_build_sdres_tlv(tid, sap);
+ if (sdp == NULL)
+ goto exit;
+
+ sdres_tlvs_len += sdp->tlv_len;
+ hlist_add_head(&sdp->node, &llc_sdres_list);
+ break;
+
+ case LLCP_TLV_SDRES:
+ mutex_lock(&local->sdreq_lock);
+
+ pr_debug("LLCP_TLV_SDRES: searching tid %d\n", tlv[2]);
+
+ hlist_for_each_entry(sdp, &local->pending_sdreqs, node) {
+ if (sdp->tid != tlv[2])
+ continue;
+
+ sdp->sap = tlv[3];
+
+ pr_debug("Found: uri=%s, sap=%d\n",
+ sdp->uri, sdp->sap);
+
+ hlist_del(&sdp->node);
+
+ hlist_add_head(&sdp->node, &nl_sdres_list);
+
+ break;
+ }
+
+ mutex_unlock(&local->sdreq_lock);
break;
default:
offset += length + 2;
tlv += length + 2;
}
+
+exit:
+ if (!hlist_empty(&nl_sdres_list))
+ nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list);
+
+ if (!hlist_empty(&llc_sdres_list))
+ nfc_llcp_send_snl_sdres(local, &llc_sdres_list, sdres_tlvs_len);
}
-static void nfc_llcp_rx_work(struct work_struct *work)
+static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb)
{
- struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
- rx_work);
- u8 dsap, ssap, ptype;
- struct sk_buff *skb;
+ u8 ptype;
+ u16 pdu_len;
+ struct sk_buff *new_skb;
- skb = local->rx_pending;
- if (skb == NULL) {
- pr_debug("No pending SKB\n");
+ if (skb->len <= LLCP_HEADER_SIZE) {
+ pr_err("Malformed AGF PDU\n");
return;
}
+ skb_pull(skb, LLCP_HEADER_SIZE);
+
+ while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) {
+ pdu_len = skb->data[0] << 8 | skb->data[1];
+
+ skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE);
+
+ if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) {
+ pr_err("Malformed AGF PDU\n");
+ return;
+ }
+
+ ptype = nfc_llcp_ptype(skb);
+
+ if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF)
+ goto next;
+
+ new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL);
+ if (new_skb == NULL) {
+ pr_err("Could not allocate PDU\n");
+ return;
+ }
+
+ memcpy(skb_put(new_skb, pdu_len), skb->data, pdu_len);
+
+ nfc_llcp_rx_skb(local, new_skb);
+
+ kfree_skb(new_skb);
+next:
+ skb_pull(skb, pdu_len);
+ }
+}
+
+static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb)
+{
+ u8 dsap, ssap, ptype;
+
ptype = nfc_llcp_ptype(skb);
dsap = nfc_llcp_dsap(skb);
ssap = nfc_llcp_ssap(skb);
print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET,
16, 1, skb->data, skb->len, true);
- nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
-
switch (ptype) {
case LLCP_PDU_SYMM:
pr_debug("SYMM\n");
nfc_llcp_recv_hdlc(local, skb);
break;
+ case LLCP_PDU_AGF:
+ pr_debug("AGF frame\n");
+ nfc_llcp_recv_agf(local, skb);
+ break;
+ }
+}
+
+static void nfc_llcp_rx_work(struct work_struct *work)
+{
+ struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
+ rx_work);
+ struct sk_buff *skb;
+
+ skb = local->rx_pending;
+ if (skb == NULL) {
+ pr_debug("No pending SKB\n");
+ return;
}
- queue_work(system_nrt_wq, &local->tx_work);
+ __net_timestamp(skb);
+
+ nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
+
+ nfc_llcp_rx_skb(local, skb);
+
+ schedule_work(&local->tx_work);
kfree_skb(local->rx_pending);
local->rx_pending = NULL;
}
+static void __nfc_llcp_recv(struct nfc_llcp_local *local, struct sk_buff *skb)
+{
+ local->rx_pending = skb;
+ del_timer(&local->link_timer);
+ schedule_work(&local->rx_work);
+}
+
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
{
struct nfc_llcp_local *local = (struct nfc_llcp_local *) data;
return;
}
- local->rx_pending = skb_get(skb);
- del_timer(&local->link_timer);
- queue_work(system_nrt_wq, &local->rx_work);
+ __nfc_llcp_recv(local, skb);
}
int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
if (local == NULL)
return -ENODEV;
- local->rx_pending = skb_get(skb);
- del_timer(&local->link_timer);
- queue_work(system_nrt_wq, &local->rx_work);
+ __nfc_llcp_recv(local, skb);
return 0;
}
if (local == NULL)
return;
+ local->remote_miu = LLCP_DEFAULT_MIU;
+ local->remote_lto = LLCP_DEFAULT_LTO;
+
/* Close and purge all existing sockets */
- nfc_llcp_socket_release(local, true);
+ nfc_llcp_socket_release(local, true, 0);
}
void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
if (rf_mode == NFC_RF_INITIATOR) {
pr_debug("Queueing Tx work\n");
- queue_work(system_nrt_wq, &local->tx_work);
+ schedule_work(&local->tx_work);
} else {
mod_timer(&local->link_timer,
jiffies + msecs_to_jiffies(local->remote_lto));
rwlock_init(&local->connecting_sockets.lock);
rwlock_init(&local->raw_sockets.lock);
+ local->lto = 150; /* 1500 ms */
+ local->rw = LLCP_MAX_RW;
+ local->miux = cpu_to_be16(LLCP_MAX_MIUX);
+
nfc_llcp_build_gb(local);
local->remote_miu = LLCP_DEFAULT_MIU;
local->remote_lto = LLCP_DEFAULT_LTO;
- list_add(&llcp_devices, &local->list);
+ mutex_init(&local->sdreq_lock);
+ INIT_HLIST_HEAD(&local->pending_sdreqs);
+ init_timer(&local->sdreq_timer);
+ local->sdreq_timer.data = (unsigned long) local;
+ local->sdreq_timer.function = nfc_llcp_sdreq_timer;
+ INIT_WORK(&local->sdreq_timeout_work, nfc_llcp_sdreq_timeout_work);
+
+ list_add(&local->list, &llcp_devices);
return 0;
}
return;
}
+ local_cleanup(local);
+
nfc_llcp_local_put(local);
}
#define LLCP_MAX_LTO 0xff
#define LLCP_MAX_RW 15
#define LLCP_MAX_MIUX 0x7ff
+#define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128)
#define LLCP_WKS_NUM_SAP 16
#define LLCP_SDP_NUM_SAP 16
rwlock_t lock;
};
+struct nfc_llcp_sdp_tlv {
+ u8 *tlv;
+ u8 tlv_len;
+
+ char *uri;
+ u8 tid;
+ u8 sap;
+
+ unsigned long time;
+
+ struct hlist_node node;
+};
+
struct nfc_llcp_local {
struct list_head list;
struct nfc_dev *dev;
u32 target_idx;
u8 rf_mode;
u8 comm_mode;
+ u8 lto;
+ u8 rw;
+ __be16 miux;
unsigned long local_wks; /* Well known services */
unsigned long local_sdp; /* Local services */
unsigned long local_sap; /* Local SAPs, not available for discovery */
u8 remote_opt;
u16 remote_wks;
+ struct mutex sdreq_lock;
+ struct hlist_head pending_sdreqs;
+ struct timer_list sdreq_timer;
+ struct work_struct sdreq_timeout_work;
+ u8 sdreq_next_tid;
+
/* sockets array */
struct llcp_sock_list sockets;
struct llcp_sock_list connecting_sockets;
char *service_name;
size_t service_name_len;
u8 rw;
- u16 miu;
+ __be16 miux;
+
+
+ /* Remote link parameters */
+ u8 remote_rw;
+ u16 remote_miu;
/* Link variables */
u8 send_n;
struct sk_buff_head tx_queue;
struct sk_buff_head tx_pending_queue;
- struct sk_buff_head tx_backlog_queue;
struct list_head accept_queue;
struct sock *parent;
#define LLCP_HEADER_SIZE 2
#define LLCP_SEQUENCE_SIZE 1
+#define LLCP_AGF_PDU_HEADER_SIZE 2
/* LLCP versions: 1.1 is 1.0 plus SDP */
#define LLCP_VERSION_10 0x10
void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s);
void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s);
+void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock);
struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local);
int nfc_llcp_local_put(struct nfc_llcp_local *local);
/* Commands API */
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length);
+struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap);
+struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri,
+ size_t uri_len);
+void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
+void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head);
void nfc_llcp_recv(void *data, struct sk_buff *skb, int err);
int nfc_llcp_disconnect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_symm(struct nfc_dev *dev);
int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
-int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap);
+int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
+ struct hlist_head *tlv_list, size_t tlvs_len);
+int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
+ struct hlist_head *tlv_list, size_t tlvs_len);
int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
return ret;
}
+static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+ u32 opt;
+ int err = 0;
+
+ pr_debug("%p optname %d\n", sk, optname);
+
+ if (level != SOL_NFC)
+ return -ENOPROTOOPT;
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case NFC_LLCP_RW:
+ if (sk->sk_state == LLCP_CONNECTED ||
+ sk->sk_state == LLCP_BOUND ||
+ sk->sk_state == LLCP_LISTEN) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (get_user(opt, (u32 __user *) optval)) {
+ err = -EFAULT;
+ break;
+ }
+
+ if (opt > LLCP_MAX_RW) {
+ err = -EINVAL;
+ break;
+ }
+
+ llcp_sock->rw = (u8) opt;
+
+ break;
+
+ case NFC_LLCP_MIUX:
+ if (sk->sk_state == LLCP_CONNECTED ||
+ sk->sk_state == LLCP_BOUND ||
+ sk->sk_state == LLCP_LISTEN) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (get_user(opt, (u32 __user *) optval)) {
+ err = -EFAULT;
+ break;
+ }
+
+ if (opt > LLCP_MAX_MIUX) {
+ err = -EINVAL;
+ break;
+ }
+
+ llcp_sock->miux = cpu_to_be16((u16) opt);
+
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+
+ pr_debug("%p rw %d miux %d\n", llcp_sock,
+ llcp_sock->rw, llcp_sock->miux);
+
+ return err;
+}
+
+static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct nfc_llcp_local *local;
+ struct sock *sk = sock->sk;
+ struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+ int len, err = 0;
+ u16 miux, remote_miu;
+ u8 rw;
+
+ pr_debug("%p optname %d\n", sk, optname);
+
+ if (level != SOL_NFC)
+ return -ENOPROTOOPT;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ local = llcp_sock->local;
+ if (!local)
+ return -ENODEV;
+
+ len = min_t(u32, len, sizeof(u32));
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case NFC_LLCP_RW:
+ rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw;
+ if (put_user(rw, (u32 __user *) optval))
+ err = -EFAULT;
+
+ break;
+
+ case NFC_LLCP_MIUX:
+ miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ?
+ be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux);
+
+ if (put_user(miux, (u32 __user *) optval))
+ err = -EFAULT;
+
+ break;
+
+ case NFC_LLCP_REMOTE_MIU:
+ remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ?
+ local->remote_miu : llcp_sock->remote_miu;
+
+ if (put_user(remote_miu, (u32 __user *) optval))
+ err = -EFAULT;
+
+ break;
+
+ case NFC_LLCP_REMOTE_LTO:
+ if (put_user(local->remote_lto / 10, (u32 __user *) optval))
+ err = -EFAULT;
+
+ break;
+
+ case NFC_LLCP_REMOTE_RW:
+ if (put_user(llcp_sock->remote_rw, (u32 __user *) optval))
+ err = -EFAULT;
+
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+
+ return err;
+}
+
void nfc_llcp_accept_unlink(struct sock *sk)
{
struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
}
if (sk->sk_state == LLCP_CONNECTED || !newsock) {
- nfc_llcp_accept_unlink(sk);
+ list_del_init(&lsk->accept_queue);
+ sock_put(sk);
+
if (newsock)
sock_graft(sk, newsock);
pr_debug("Returning sk state %d\n", sk->sk_state);
+ sk_acceptq_removed(parent);
+
return sk;
}
nfc_llcp_accept_unlink(accept_sk);
release_sock(accept_sk);
-
- sock_orphan(accept_sk);
}
}
llcp_sock->dev = dev;
llcp_sock->local = nfc_llcp_local_get(local);
- llcp_sock->miu = llcp_sock->local->remote_miu;
+ llcp_sock->remote_miu = llcp_sock->local->remote_miu;
llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
if (llcp_sock->ssap == LLCP_SAP_MAX) {
ret = -ENOMEM;
copied = min_t(unsigned int, rlen, len);
cskb = skb;
- if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) {
+ if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) {
if (!(flags & MSG_PEEK))
skb_queue_head(&sk->sk_receive_queue, skb);
return -EFAULT;
}
+ sock_recv_timestamp(msg, sk, skb);
+
if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
- struct sockaddr_nfc_llcp sockaddr;
+ struct sockaddr_nfc_llcp *sockaddr =
+ (struct sockaddr_nfc_llcp *) msg->msg_name;
- pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
+ msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
- sockaddr.sa_family = AF_NFC;
- sockaddr.nfc_protocol = NFC_PROTO_NFC_DEP;
- sockaddr.dsap = ui_cb->dsap;
- sockaddr.ssap = ui_cb->ssap;
+ pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
- memcpy(msg->msg_name, &sockaddr, sizeof(sockaddr));
- msg->msg_namelen = sizeof(sockaddr);
+ sockaddr->sa_family = AF_NFC;
+ sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
+ sockaddr->dsap = ui_cb->dsap;
+ sockaddr->ssap = ui_cb->ssap;
}
/* Mark read part of skb as used */
.ioctl = sock_no_ioctl,
.listen = llcp_sock_listen,
.shutdown = sock_no_shutdown,
- .setsockopt = sock_no_setsockopt,
- .getsockopt = sock_no_getsockopt,
+ .setsockopt = nfc_llcp_setsockopt,
+ .getsockopt = nfc_llcp_getsockopt,
.sendmsg = llcp_sock_sendmsg,
.recvmsg = llcp_sock_recvmsg,
.mmap = sock_no_mmap,
llcp_sock->ssap = 0;
llcp_sock->dsap = LLCP_SAP_SDP;
- llcp_sock->rw = LLCP_DEFAULT_RW;
- llcp_sock->miu = LLCP_DEFAULT_MIU;
+ llcp_sock->rw = LLCP_MAX_RW + 1;
+ llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
llcp_sock->send_n = llcp_sock->send_ack_n = 0;
llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
llcp_sock->remote_ready = 1;
llcp_sock->reserved_ssap = LLCP_SAP_MAX;
+ nfc_llcp_socket_remote_param_init(llcp_sock);
skb_queue_head_init(&llcp_sock->tx_queue);
skb_queue_head_init(&llcp_sock->tx_pending_queue);
- skb_queue_head_init(&llcp_sock->tx_backlog_queue);
INIT_LIST_HEAD(&llcp_sock->accept_queue);
if (sock != NULL)
skb_queue_purge(&sock->tx_queue);
skb_queue_purge(&sock->tx_pending_queue);
- skb_queue_purge(&sock->tx_backlog_queue);
list_del_init(&sock->accept_queue);
config NFC_NCI
- depends on NFC && EXPERIMENTAL
- tristate "NCI protocol support (EXPERIMENTAL)"
+ depends on NFC
+ tristate "NCI protocol support"
default n
help
NCI (NFC Controller Interface) is a communication protocol between
}
}
-
static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
__u8 comm_mode, __u8 *gb, size_t gb_len)
{
*/
struct nci_dev *nci_allocate_device(struct nci_ops *ops,
__u32 supported_protocols,
+ __u32 supported_se,
int tx_headroom, int tx_tailroom)
{
struct nci_dev *ndev;
ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
supported_protocols,
+ supported_se,
tx_headroom + NCI_DATA_HDR_SIZE,
tx_tailroom);
if (!ndev->nfc_dev)
#include "nfc.h"
+#include "llcp/llcp.h"
+
static struct genl_multicast_group nfc_genl_event_mcgrp = {
.name = NFC_GENL_MCAST_EVENT_NAME,
};
[NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
[NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
[NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
+ [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
+ [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
+ [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
+ [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
+};
+
+static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
+ [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
+ [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
};
static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
return -EMSGSIZE;
}
+int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
+{
+ struct sk_buff *msg;
+ struct nlattr *sdp_attr, *uri_attr;
+ struct nfc_llcp_sdp_tlv *sdres;
+ struct hlist_node *n;
+ void *hdr;
+ int rc = -EMSGSIZE;
+ int i;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_EVENT_LLC_SDRES);
+ if (!hdr)
+ goto free_msg;
+
+ if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
+ goto nla_put_failure;
+
+ sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
+ if (sdp_attr == NULL) {
+ rc = -ENOMEM;
+ goto nla_put_failure;
+ }
+
+ i = 1;
+ hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
+ pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
+
+ uri_attr = nla_nest_start(msg, i++);
+ if (uri_attr == NULL) {
+ rc = -ENOMEM;
+ goto nla_put_failure;
+ }
+
+ if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
+ goto nla_put_failure;
+
+ if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, uri_attr);
+
+ hlist_del(&sdres->node);
+
+ nfc_llcp_free_sdp_tlv(sdres);
+ }
+
+ nla_nest_end(msg, sdp_attr);
+
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+
+free_msg:
+ nlmsg_free(msg);
+
+ nfc_llcp_free_sdp_tlv_list(sdres_list);
+
+ return rc;
+}
+
static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
u32 pid, u32 seq,
struct netlink_callback *cb,
if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
+ nla_put_u32(msg, NFC_ATTR_SE, dev->supported_se) ||
nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
goto nla_put_failure;
if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
!info->attrs[NFC_ATTR_PROTOCOLS]) &&
- !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
+ !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
return -EINVAL;
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
return rc;
}
+static int nfc_genl_send_params(struct sk_buff *msg,
+ struct nfc_llcp_local *local,
+ u32 portid, u32 seq)
+{
+ void *hdr;
+
+ hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
+ NFC_CMD_LLC_GET_PARAMS);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
+ nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
+ nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
+ nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
+ goto nla_put_failure;
+
+ return genlmsg_end(msg, hdr);
+
+nla_put_failure:
+
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ struct nfc_llcp_local *local;
+ int rc = 0;
+ struct sk_buff *msg = NULL;
+ u32 idx;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ device_lock(&dev->dev);
+
+ local = nfc_llcp_find_local(dev);
+ if (!local) {
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
+ rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
+
+exit:
+ device_unlock(&dev->dev);
+
+ nfc_put_device(dev);
+
+ if (rc < 0) {
+ if (msg)
+ nlmsg_free(msg);
+
+ return rc;
+ }
+
+ return genlmsg_reply(msg, info);
+}
+
+static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ struct nfc_llcp_local *local;
+ u8 rw = 0;
+ u16 miux = 0;
+ u32 idx;
+ int rc = 0;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
+ !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
+ !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
+ return -EINVAL;
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
+ rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
+
+ if (rw > LLCP_MAX_RW)
+ return -EINVAL;
+ }
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
+ miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
+
+ if (miux > LLCP_MAX_MIUX)
+ return -EINVAL;
+ }
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev)
+ return -ENODEV;
+
+ device_lock(&dev->dev);
+
+ local = nfc_llcp_find_local(dev);
+ if (!local) {
+ nfc_put_device(dev);
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
+ if (dev->dep_link_up) {
+ rc = -EINPROGRESS;
+ goto exit;
+ }
+
+ local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
+ }
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
+ local->rw = rw;
+
+ if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
+ local->miux = cpu_to_be16(miux);
+
+exit:
+ device_unlock(&dev->dev);
+
+ nfc_put_device(dev);
+
+ return rc;
+}
+
+static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ struct nfc_llcp_local *local;
+ struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
+ u32 idx;
+ u8 tid;
+ char *uri;
+ int rc = 0, rem;
+ size_t uri_len, tlvs_len;
+ struct hlist_head sdreq_list;
+ struct nfc_llcp_sdp_tlv *sdreq;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ !info->attrs[NFC_ATTR_LLC_SDP])
+ return -EINVAL;
+
+ idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+ dev = nfc_get_device(idx);
+ if (!dev) {
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ device_lock(&dev->dev);
+
+ if (dev->dep_link_up == false) {
+ rc = -ENOLINK;
+ goto exit;
+ }
+
+ local = nfc_llcp_find_local(dev);
+ if (!local) {
+ nfc_put_device(dev);
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ INIT_HLIST_HEAD(&sdreq_list);
+
+ tlvs_len = 0;
+
+ nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
+ rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
+ nfc_sdp_genl_policy);
+
+ if (rc != 0) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ if (!sdp_attrs[NFC_SDP_ATTR_URI])
+ continue;
+
+ uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
+ if (uri_len == 0)
+ continue;
+
+ uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
+ if (uri == NULL || *uri == 0)
+ continue;
+
+ tid = local->sdreq_next_tid++;
+
+ sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
+ if (sdreq == NULL) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
+ tlvs_len += sdreq->tlv_len;
+
+ hlist_add_head(&sdreq->node, &sdreq_list);
+ }
+
+ if (hlist_empty(&sdreq_list)) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
+exit:
+ device_unlock(&dev->dev);
+
+ nfc_put_device(dev);
+
+ return rc;
+}
+
static struct genl_ops nfc_genl_ops[] = {
{
.cmd = NFC_CMD_GET_DEVICE,
.done = nfc_genl_dump_targets_done,
.policy = nfc_genl_policy,
},
+ {
+ .cmd = NFC_CMD_LLC_GET_PARAMS,
+ .doit = nfc_genl_llc_get_params,
+ .policy = nfc_genl_policy,
+ },
+ {
+ .cmd = NFC_CMD_LLC_SET_PARAMS,
+ .doit = nfc_genl_llc_set_params,
+ .policy = nfc_genl_policy,
+ },
+ {
+ .cmd = NFC_CMD_LLC_SDREQ,
+ .doit = nfc_genl_llc_sdreq,
+ .policy = nfc_genl_policy,
+ },
};
#define to_rawsock_sk(_tx_work) \
((struct sock *) container_of(_tx_work, struct nfc_rawsock, tx_work))
+struct nfc_llcp_sdp_tlv;
+
#ifdef CONFIG_NFC_LLCP
void nfc_llcp_mac_is_down(struct nfc_dev *dev);
int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len);
u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len);
int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb);
+struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
int __init nfc_llcp_init(void);
void nfc_llcp_exit(void);
+void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp);
+void nfc_llcp_free_sdp_tlv_list(struct hlist_head *head);
#else
return 0;
}
+static inline struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
+{
+ return NULL;
+}
+
static inline int nfc_llcp_init(void)
{
return 0;
{
}
+static inline void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp)
+{
+}
+
+static inline void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head)
+{
+}
+
#endif
int __init rawsock_init(void);
int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol);
int nfc_genl_tm_deactivated(struct nfc_dev *dev);
+int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list);
+
struct nfc_dev *nfc_get_device(unsigned int idx);
static inline void nfc_put_device(struct nfc_dev *dev)
return rc ? : copied;
}
-
static const struct proto_ops rawsock_ops = {
.family = PF_NFC,
.owner = THIS_MODULE,
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff