__u16 flags;
#define IMON_NO_FLAGS 0
#define IMON_NEED_20MS_PKT_DELAY 1
+#define IMON_IR_RAW 2
struct imon_panel_key_table key_table[];
};
unsigned char usb_tx_buf[8];
unsigned int send_packet_delay;
+ struct rx_data {
+ int count; /* length of 0 or 1 sequence */
+ int prev_bit; /* logic level of sequence */
+ int initial_space; /* initial space flag */
+ } rx;
+
struct tx_t {
unsigned char data_buf[35]; /* user data buffer */
struct completion finished; /* wait for write to finish */
}
};
+static const struct imon_usb_dev_descr imon_ir_raw = {
+ .flags = IMON_IR_RAW,
+};
+
/*
* USB Device ID for iMON USB Control Boards
*
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0046),
.driver_info = (unsigned long)&imon_default_table},
+ /* TriGem iMON (IR only) -- TG_iMON.inf */
+ { USB_DEVICE(0x0aa8, 0x8001),
+ .driver_info = (unsigned long)&imon_ir_raw},
+ /* SoundGraph iMON (IR only) -- sg_imon.inf */
+ { USB_DEVICE(0x04e8, 0xff30),
+ .driver_info = (unsigned long)&imon_ir_raw},
+ /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
+ { USB_DEVICE(0x0aa8, 0xffda),
+ .driver_info = (unsigned long)&imon_ir_raw},
+ /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
+ { USB_DEVICE(0x15c2, 0xffda),
+ .driver_info = (unsigned long)&imon_ir_raw},
{}
};
/**
* Process the incoming packet
*/
-static void imon_incoming_packet(struct imon_context *ictx,
+/**
+ * Convert bit count to time duration (in us) and submit
+ * the value to lirc_dev.
+ */
+static void submit_data(struct imon_context *context)
+{
+ DEFINE_IR_RAW_EVENT(ev);
+
+ ev.pulse = context->rx.prev_bit;
+ ev.duration = US_TO_NS(context->rx.count * BIT_DURATION);
+ ir_raw_event_store_with_filter(context->rdev, &ev);
+}
+
+/**
+ * Process the incoming packet
+ */
+static void imon_incoming_ir_raw(struct imon_context *context,
struct urb *urb, int intf)
{
int len = urb->actual_length;
unsigned char *buf = urb->transfer_buffer;
+ struct device *dev = context->dev;
+ int octet, bit;
+ unsigned char mask;
+
+ if (len != 8) {
+ dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
+ __func__, len, intf);
+ return;
+ }
+
+ if (debug)
+ dev_info(dev, "raw packet: %*ph\n", len, buf);
+ /*
+ * Translate received data to pulse and space lengths.
+ * Received data is active low, i.e. pulses are 0 and
+ * spaces are 1.
+ *
+ * My original algorithm was essentially similar to
+ * Changwoo Ryu's with the exception that he switched
+ * the incoming bits to active high and also fed an
+ * initial space to LIRC at the start of a new sequence
+ * if the previous bit was a pulse.
+ *
+ * I've decided to adopt his algorithm.
+ */
+
+ if (buf[7] == 1 && context->rx.initial_space) {
+ /* LIRC requires a leading space */
+ context->rx.prev_bit = 0;
+ context->rx.count = 4;
+ submit_data(context);
+ context->rx.count = 0;
+ }
+
+ for (octet = 0; octet < 5; ++octet) {
+ mask = 0x80;
+ for (bit = 0; bit < 8; ++bit) {
+ int curr_bit = !(buf[octet] & mask);
+
+ if (curr_bit != context->rx.prev_bit) {
+ if (context->rx.count) {
+ submit_data(context);
+ context->rx.count = 0;
+ }
+ context->rx.prev_bit = curr_bit;
+ }
+ ++context->rx.count;
+ mask >>= 1;
+ }
+ }
+
+ if (buf[7] == 10) {
+ if (context->rx.count) {
+ submit_data(context);
+ context->rx.count = 0;
+ }
+ context->rx.initial_space = context->rx.prev_bit;
+ }
+
+ ir_raw_event_handle(context->rdev);
+}
+
+static void imon_incoming_scancode(struct imon_context *ictx,
+ struct urb *urb, int intf)
+{
+ int len = urb->actual_length;
+ unsigned char *buf = urb->transfer_buffer;
struct device *dev = ictx->dev;
unsigned long flags;
u32 kc;
break;
case 0:
- imon_incoming_packet(ictx, urb, intfnum);
+ if (ictx->rdev->driver_type == RC_DRIVER_IR_RAW)
+ imon_incoming_ir_raw(ictx, urb, intfnum);
+ else
+ imon_incoming_scancode(ictx, urb, intfnum);
break;
default:
break;
case 0:
- imon_incoming_packet(ictx, urb, intfnum);
+ if (ictx->rdev->driver_type == RC_DRIVER_IR_RAW)
+ imon_incoming_ir_raw(ictx, urb, intfnum);
+ else
+ imon_incoming_scancode(ictx, urb, intfnum);
break;
default:
case 0x0041:
case 0x0042:
case 0x0043:
+ case 0x8001:
+ case 0xff30:
configured_display_type = IMON_DISPLAY_TYPE_NONE;
ictx->display_supported = false;
break;
case 0x0036:
case 0x0044:
+ case 0xffda:
default:
configured_display_type = IMON_DISPLAY_TYPE_VFD;
break;
const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x88 };
- rdev = rc_allocate_device(RC_DRIVER_SCANCODE);
+ rdev = rc_allocate_device(ictx->dev_descr->flags & IMON_IR_RAW ?
+ RC_DRIVER_IR_RAW : RC_DRIVER_SCANCODE);
if (!rdev) {
dev_err(ictx->dev, "remote control dev allocation failed\n");
goto out;
rdev->dev.parent = ictx->dev;
rdev->priv = ictx;
- rdev->allowed_protocols = RC_BIT_OTHER | RC_BIT_RC6_MCE; /* iMON PAD or MCE */
+ if (ictx->dev_descr->flags & IMON_IR_RAW)
+ rdev->allowed_protocols = RC_BIT_ALL_IR_DECODER;
+ else
+ /* iMON PAD or MCE */
+ rdev->allowed_protocols = RC_BIT_OTHER | RC_BIT_RC6_MCE;
rdev->change_protocol = imon_ir_change_protocol;
rdev->driver_name = MOD_NAME;
imon_set_display_type(ictx);
- if (ictx->rc_type == RC_BIT_RC6_MCE)
+ if (ictx->rc_type == RC_BIT_RC6_MCE ||
+ ictx->dev_descr->flags & IMON_IR_RAW)
rdev->map_name = RC_MAP_IMON_MCE;
else
rdev->map_name = RC_MAP_IMON_PAD;
+++ /dev/null
-/*
- * lirc_imon.c: LIRC/VFD/LCD driver for SoundGraph iMON IR/VFD/LCD
- * including the iMON PAD model
- *
- * Copyright(C) 2004 Venky Raju(dev@venky.ws)
- * Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com>
- *
- * lirc_imon 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/usb.h>
-
-#include <media/lirc.h>
-#include <media/lirc_dev.h>
-
-#define MOD_AUTHOR "Venky Raju <dev@venky.ws>"
-#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
-#define MOD_NAME "lirc_imon"
-#define MOD_VERSION "0.8"
-
-#define DISPLAY_MINOR_BASE 144
-#define DEVICE_NAME "lcd%d"
-
-#define BUF_CHUNK_SIZE 4
-#define BUF_SIZE 128
-
-#define BIT_DURATION 250 /* each bit received is 250us */
-
-/*** P R O T O T Y P E S ***/
-
-/* USB Callback prototypes */
-static int imon_probe(struct usb_interface *interface,
- const struct usb_device_id *id);
-static void imon_disconnect(struct usb_interface *interface);
-static void usb_rx_callback(struct urb *urb);
-static void usb_tx_callback(struct urb *urb);
-
-/* suspend/resume support */
-static int imon_resume(struct usb_interface *intf);
-static int imon_suspend(struct usb_interface *intf, pm_message_t message);
-
-/* Display file_operations function prototypes */
-static int display_open(struct inode *inode, struct file *file);
-static int display_close(struct inode *inode, struct file *file);
-
-/* VFD write operation */
-static ssize_t vfd_write(struct file *file, const char __user *buf,
- size_t n_bytes, loff_t *pos);
-
-/* LIRC driver function prototypes */
-static int ir_open(void *data);
-static void ir_close(void *data);
-
-/*** G L O B A L S ***/
-#define IMON_DATA_BUF_SZ 35
-
-struct imon_context {
- struct usb_device *usbdev;
- /* Newer devices have two interfaces */
- int display; /* not all controllers do */
- int display_isopen; /* display port has been opened */
- int ir_isopen; /* IR port open */
- int dev_present; /* USB device presence */
- struct mutex ctx_lock; /* to lock this object */
- wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
-
- int vfd_proto_6p; /* some VFD require a 6th packet */
-
- struct lirc_driver *driver;
- struct usb_endpoint_descriptor *rx_endpoint;
- struct usb_endpoint_descriptor *tx_endpoint;
- struct urb *rx_urb;
- struct urb *tx_urb;
- unsigned char usb_rx_buf[8];
- unsigned char usb_tx_buf[8];
-
- struct rx_data {
- int count; /* length of 0 or 1 sequence */
- int prev_bit; /* logic level of sequence */
- int initial_space; /* initial space flag */
- } rx;
-
- struct tx_t {
- unsigned char data_buf[IMON_DATA_BUF_SZ]; /* user data buffer */
- struct completion finished; /* wait for write to finish */
- atomic_t busy; /* write in progress */
- int status; /* status of tx completion */
- } tx;
-};
-
-static const struct file_operations display_fops = {
- .owner = THIS_MODULE,
- .open = &display_open,
- .write = &vfd_write,
- .release = &display_close,
- .llseek = noop_llseek,
-};
-
-/*
- * USB Device ID for iMON USB Control Boards
- *
- * The Windows drivers contain 6 different inf files, more or less one for
- * each new device until the 0x0034-0x0046 devices, which all use the same
- * driver. Some of the devices in the 34-46 range haven't been definitively
- * identified yet. Early devices have either a TriGem Computer, Inc. or a
- * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
- * devices use the SoundGraph vendor ID (0x15c2).
- */
-static struct usb_device_id imon_usb_id_table[] = {
- /* TriGem iMON (IR only) -- TG_iMON.inf */
- { USB_DEVICE(0x0aa8, 0x8001) },
-
- /* SoundGraph iMON (IR only) -- sg_imon.inf */
- { USB_DEVICE(0x04e8, 0xff30) },
-
- /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
- { USB_DEVICE(0x0aa8, 0xffda) },
-
- /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
- { USB_DEVICE(0x15c2, 0xffda) },
-
- {}
-};
-
-/* Some iMON VFD models requires a 6th packet for VFD writes */
-static struct usb_device_id vfd_proto_6p_list[] = {
- { USB_DEVICE(0x15c2, 0xffda) },
- {}
-};
-
-/* Some iMON devices have no lcd/vfd, don't set one up */
-static struct usb_device_id ir_only_list[] = {
- { USB_DEVICE(0x0aa8, 0x8001) },
- { USB_DEVICE(0x04e8, 0xff30) },
- {}
-};
-
-/* USB Device data */
-static struct usb_driver imon_driver = {
- .name = MOD_NAME,
- .probe = imon_probe,
- .disconnect = imon_disconnect,
- .suspend = imon_suspend,
- .resume = imon_resume,
- .id_table = imon_usb_id_table,
-};
-
-static struct usb_class_driver imon_class = {
- .name = DEVICE_NAME,
- .fops = &display_fops,
- .minor_base = DISPLAY_MINOR_BASE,
-};
-
-/* to prevent races between open() and disconnect(), probing, etc */
-static DEFINE_MUTEX(driver_lock);
-
-static int debug;
-
-/*** M O D U L E C O D E ***/
-
-MODULE_AUTHOR(MOD_AUTHOR);
-MODULE_DESCRIPTION(MOD_DESC);
-MODULE_VERSION(MOD_VERSION);
-MODULE_LICENSE("GPL");
-MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
-module_param(debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
-
-static void free_imon_context(struct imon_context *context)
-{
- struct device *dev = context->driver->dev;
-
- usb_free_urb(context->tx_urb);
- usb_free_urb(context->rx_urb);
- lirc_buffer_free(context->driver->rbuf);
- kfree(context->driver->rbuf);
- kfree(context->driver);
- kfree(context);
-
- dev_dbg(dev, "%s: iMON context freed\n", __func__);
-}
-
-static void deregister_from_lirc(struct imon_context *context)
-{
- int retval;
- int minor = context->driver->minor;
-
- retval = lirc_unregister_driver(minor);
- if (retval)
- dev_err(&context->usbdev->dev,
- "unable to deregister from lirc(%d)", retval);
- else
- dev_info(&context->usbdev->dev,
- "Deregistered iMON driver (minor:%d)\n", minor);
-}
-
-/**
- * Called when the Display device (e.g. /dev/lcd0)
- * is opened by the application.
- */
-static int display_open(struct inode *inode, struct file *file)
-{
- struct usb_interface *interface;
- struct imon_context *context = NULL;
- int subminor;
- int retval = 0;
-
- /* prevent races with disconnect */
- mutex_lock(&driver_lock);
-
- subminor = iminor(inode);
- interface = usb_find_interface(&imon_driver, subminor);
- if (!interface) {
- pr_err("%s: could not find interface for minor %d\n",
- __func__, subminor);
- retval = -ENODEV;
- goto exit;
- }
- context = usb_get_intfdata(interface);
-
- if (!context) {
- dev_err(&interface->dev, "no context found for minor %d\n",
- subminor);
- retval = -ENODEV;
- goto exit;
- }
-
- mutex_lock(&context->ctx_lock);
-
- if (!context->display) {
- dev_err(&interface->dev,
- "%s: display not supported by device\n", __func__);
- retval = -ENODEV;
- } else if (context->display_isopen) {
- dev_err(&interface->dev,
- "%s: display port is already open\n", __func__);
- retval = -EBUSY;
- } else {
- context->display_isopen = 1;
- file->private_data = context;
- dev_info(context->driver->dev, "display port opened\n");
- }
-
- mutex_unlock(&context->ctx_lock);
-
-exit:
- mutex_unlock(&driver_lock);
- return retval;
-}
-
-/**
- * Called when the display device (e.g. /dev/lcd0)
- * is closed by the application.
- */
-static int display_close(struct inode *inode, struct file *file)
-{
- struct imon_context *context = NULL;
- int retval = 0;
-
- context = file->private_data;
-
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return -ENODEV;
- }
-
- mutex_lock(&context->ctx_lock);
-
- if (!context->display) {
- dev_err(&context->usbdev->dev,
- "%s: display not supported by device\n", __func__);
- retval = -ENODEV;
- } else if (!context->display_isopen) {
- dev_err(&context->usbdev->dev,
- "%s: display is not open\n", __func__);
- retval = -EIO;
- } else {
- context->display_isopen = 0;
- dev_info(context->driver->dev, "display port closed\n");
- if (!context->dev_present && !context->ir_isopen) {
- /*
- * Device disconnected before close and IR port is not
- * open. If IR port is open, context will be deleted by
- * ir_close.
- */
- mutex_unlock(&context->ctx_lock);
- free_imon_context(context);
- return retval;
- }
- }
-
- mutex_unlock(&context->ctx_lock);
- return retval;
-}
-
-/**
- * Sends a packet to the device -- this function must be called
- * with context->ctx_lock held.
- */
-static int send_packet(struct imon_context *context)
-{
- unsigned int pipe;
- int interval = 0;
- int retval = 0;
-
- /* Check if we need to use control or interrupt urb */
- pipe = usb_sndintpipe(context->usbdev,
- context->tx_endpoint->bEndpointAddress);
- interval = context->tx_endpoint->bInterval;
-
- usb_fill_int_urb(context->tx_urb, context->usbdev, pipe,
- context->usb_tx_buf,
- sizeof(context->usb_tx_buf),
- usb_tx_callback, context, interval);
-
- context->tx_urb->actual_length = 0;
-
- reinit_completion(&context->tx.finished);
- atomic_set(&context->tx.busy, 1);
-
- retval = usb_submit_urb(context->tx_urb, GFP_KERNEL);
- if (retval) {
- atomic_set(&context->tx.busy, 0);
- dev_err(&context->usbdev->dev, "error submitting urb(%d)\n",
- retval);
- } else {
- /* Wait for transmission to complete (or abort) */
- mutex_unlock(&context->ctx_lock);
- retval = wait_for_completion_interruptible(
- &context->tx.finished);
- if (retval)
- dev_err(&context->usbdev->dev,
- "%s: task interrupted\n", __func__);
- mutex_lock(&context->ctx_lock);
-
- retval = context->tx.status;
- if (retval)
- dev_err(&context->usbdev->dev,
- "packet tx failed (%d)\n", retval);
- }
-
- return retval;
-}
-
-/**
- * Writes data to the VFD. The iMON VFD is 2x16 characters
- * and requires data in 5 consecutive USB interrupt packets,
- * each packet but the last carrying 7 bytes.
- *
- * I don't know if the VFD board supports features such as
- * scrolling, clearing rows, blanking, etc. so at
- * the caller must provide a full screen of data. If fewer
- * than 32 bytes are provided spaces will be appended to
- * generate a full screen.
- */
-static ssize_t vfd_write(struct file *file, const char __user *buf,
- size_t n_bytes, loff_t *pos)
-{
- int i;
- int offset;
- int seq;
- int retval = 0;
- struct imon_context *context;
- const unsigned char vfd_packet6[] = {
- 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
- int *data_buf = NULL;
-
- context = file->private_data;
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return -ENODEV;
- }
-
- mutex_lock(&context->ctx_lock);
-
- if (!context->dev_present) {
- dev_err(&context->usbdev->dev,
- "%s: no iMON device present\n", __func__);
- retval = -ENODEV;
- goto exit;
- }
-
- if (n_bytes <= 0 || n_bytes > IMON_DATA_BUF_SZ - 3) {
- dev_err(&context->usbdev->dev,
- "%s: invalid payload size\n", __func__);
- retval = -EINVAL;
- goto exit;
- }
-
- data_buf = memdup_user(buf, n_bytes);
- if (IS_ERR(data_buf)) {
- mutex_unlock(&context->ctx_lock);
- return PTR_ERR(data_buf);
- }
-
- memcpy(context->tx.data_buf, data_buf, n_bytes);
-
- /* Pad with spaces */
- for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i)
- context->tx.data_buf[i] = ' ';
-
- for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i)
- context->tx.data_buf[i] = 0xFF;
-
- offset = 0;
- seq = 0;
-
- do {
- memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7);
- context->usb_tx_buf[7] = (unsigned char)seq;
-
- retval = send_packet(context);
- if (retval) {
- dev_err(&context->usbdev->dev,
- "send packet failed for packet #%d\n",
- seq / 2);
- goto exit;
- } else {
- seq += 2;
- offset += 7;
- }
-
- } while (offset < IMON_DATA_BUF_SZ);
-
- if (context->vfd_proto_6p) {
- /* Send packet #6 */
- memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
- context->usb_tx_buf[7] = (unsigned char)seq;
- retval = send_packet(context);
- if (retval)
- dev_err(&context->usbdev->dev,
- "send packet failed for packet #%d\n",
- seq / 2);
- }
-
-exit:
- mutex_unlock(&context->ctx_lock);
- kfree(data_buf);
-
- return (!retval) ? n_bytes : retval;
-}
-
-/**
- * Callback function for USB core API: transmit data
- */
-static void usb_tx_callback(struct urb *urb)
-{
- struct imon_context *context;
-
- if (!urb)
- return;
- context = (struct imon_context *)urb->context;
- if (!context)
- return;
-
- context->tx.status = urb->status;
-
- /* notify waiters that write has finished */
- atomic_set(&context->tx.busy, 0);
- complete(&context->tx.finished);
-}
-
-/**
- * Called by lirc_dev when the application opens /dev/lirc
- */
-static int ir_open(void *data)
-{
- struct imon_context *context;
-
- /* prevent races with disconnect */
- mutex_lock(&driver_lock);
-
- context = data;
-
- /* initial IR protocol decode variables */
- context->rx.count = 0;
- context->rx.initial_space = 1;
- context->rx.prev_bit = 0;
-
- init_completion(&context->tx.finished);
-
- context->ir_isopen = 1;
- dev_info(context->driver->dev, "IR port opened\n");
-
- mutex_unlock(&driver_lock);
- return 0;
-}
-
-/**
- * Called by lirc_dev when the application closes /dev/lirc
- */
-static void ir_close(void *data)
-{
- struct imon_context *context;
-
- context = data;
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return;
- }
-
- mutex_lock(&context->ctx_lock);
-
- context->ir_isopen = 0;
- dev_info(context->driver->dev, "IR port closed\n");
-
- if (!context->dev_present) {
- /*
- * Device disconnected while IR port was still open. Driver
- * was not deregistered at disconnect time, so do it now.
- */
- deregister_from_lirc(context);
-
- if (!context->display_isopen) {
- mutex_unlock(&context->ctx_lock);
- free_imon_context(context);
- return;
- }
- /*
- * If display port is open, context will be deleted by
- * display_close
- */
- }
-
- mutex_unlock(&context->ctx_lock);
-}
-
-/**
- * Convert bit count to time duration (in us) and submit
- * the value to lirc_dev.
- */
-static void submit_data(struct imon_context *context)
-{
- unsigned char buf[4];
- int value = context->rx.count;
- int i;
-
- dev_dbg(context->driver->dev, "submitting data to LIRC\n");
-
- value *= BIT_DURATION;
- value &= PULSE_MASK;
- if (context->rx.prev_bit)
- value |= PULSE_BIT;
-
- for (i = 0; i < 4; ++i)
- buf[i] = value >> (i * 8);
-
- lirc_buffer_write(context->driver->rbuf, buf);
- wake_up(&context->driver->rbuf->wait_poll);
-}
-
-/**
- * Process the incoming packet
- */
-static void imon_incoming_packet(struct imon_context *context,
- struct urb *urb, int intf)
-{
- int len = urb->actual_length;
- unsigned char *buf = urb->transfer_buffer;
- struct device *dev = context->driver->dev;
- int octet, bit;
- unsigned char mask;
-
- /*
- * just bail out if no listening IR client
- */
- if (!context->ir_isopen)
- return;
-
- if (len != 8) {
- dev_warn(dev, "imon %s: invalid incoming packet size (len = %d, intf%d)\n",
- __func__, len, intf);
- return;
- }
-
- if (debug)
- dev_info(dev, "raw packet: %*ph\n", len, buf);
- /*
- * Translate received data to pulse and space lengths.
- * Received data is active low, i.e. pulses are 0 and
- * spaces are 1.
- *
- * My original algorithm was essentially similar to
- * Changwoo Ryu's with the exception that he switched
- * the incoming bits to active high and also fed an
- * initial space to LIRC at the start of a new sequence
- * if the previous bit was a pulse.
- *
- * I've decided to adopt his algorithm.
- */
-
- if (buf[7] == 1 && context->rx.initial_space) {
- /* LIRC requires a leading space */
- context->rx.prev_bit = 0;
- context->rx.count = 4;
- submit_data(context);
- context->rx.count = 0;
- }
-
- for (octet = 0; octet < 5; ++octet) {
- mask = 0x80;
- for (bit = 0; bit < 8; ++bit) {
- int curr_bit = !(buf[octet] & mask);
-
- if (curr_bit != context->rx.prev_bit) {
- if (context->rx.count) {
- submit_data(context);
- context->rx.count = 0;
- }
- context->rx.prev_bit = curr_bit;
- }
- ++context->rx.count;
- mask >>= 1;
- }
- }
-
- if (buf[7] == 10) {
- if (context->rx.count) {
- submit_data(context);
- context->rx.count = 0;
- }
- context->rx.initial_space = context->rx.prev_bit;
- }
-}
-
-/**
- * Callback function for USB core API: receive data
- */
-static void usb_rx_callback(struct urb *urb)
-{
- struct imon_context *context;
- int intfnum = 0;
-
- if (!urb)
- return;
-
- context = (struct imon_context *)urb->context;
- if (!context)
- return;
-
- switch (urb->status) {
- case -ENOENT: /* usbcore unlink successful! */
- return;
-
- case 0:
- imon_incoming_packet(context, urb, intfnum);
- break;
-
- default:
- dev_warn(context->driver->dev, "imon %s: status(%d): ignored\n",
- __func__, urb->status);
- break;
- }
-
- usb_submit_urb(context->rx_urb, GFP_ATOMIC);
-}
-
-/**
- * Callback function for USB core API: Probe
- */
-static int imon_probe(struct usb_interface *interface,
- const struct usb_device_id *id)
-{
- struct usb_device *usbdev = NULL;
- struct usb_host_interface *iface_desc = NULL;
- struct usb_endpoint_descriptor *rx_endpoint = NULL;
- struct usb_endpoint_descriptor *tx_endpoint = NULL;
- struct urb *rx_urb = NULL;
- struct urb *tx_urb = NULL;
- struct lirc_driver *driver = NULL;
- struct lirc_buffer *rbuf = NULL;
- struct device *dev = &interface->dev;
- int ifnum;
- int lirc_minor = 0;
- int num_endpts;
- int retval = -ENOMEM;
- int display_ep_found = 0;
- int ir_ep_found = 0;
- int vfd_proto_6p = 0;
- struct imon_context *context = NULL;
- int i;
- u16 vendor, product;
-
- /* prevent races probing devices w/multiple interfaces */
- mutex_lock(&driver_lock);
-
- context = kzalloc(sizeof(*context), GFP_KERNEL);
- if (!context)
- goto driver_unlock;
-
- /*
- * Try to auto-detect the type of display if the user hasn't set
- * it by hand via the display_type modparam. Default is VFD.
- */
- if (usb_match_id(interface, ir_only_list))
- context->display = 0;
- else
- context->display = 1;
-
- usbdev = usb_get_dev(interface_to_usbdev(interface));
- iface_desc = interface->cur_altsetting;
- num_endpts = iface_desc->desc.bNumEndpoints;
- ifnum = iface_desc->desc.bInterfaceNumber;
- vendor = le16_to_cpu(usbdev->descriptor.idVendor);
- product = le16_to_cpu(usbdev->descriptor.idProduct);
-
- dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
- __func__, vendor, product, ifnum);
-
- /*
- * Scan the endpoint list and set:
- * first input endpoint = IR endpoint
- * first output endpoint = display endpoint
- */
- for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
- struct usb_endpoint_descriptor *ep;
- int ep_dir;
- int ep_type;
-
- ep = &iface_desc->endpoint[i].desc;
- ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
- ep_type = usb_endpoint_type(ep);
-
- if (!ir_ep_found &&
- ep_dir == USB_DIR_IN &&
- ep_type == USB_ENDPOINT_XFER_INT) {
-
- rx_endpoint = ep;
- ir_ep_found = 1;
- dev_dbg(dev, "%s: found IR endpoint\n", __func__);
-
- } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
- ep_type == USB_ENDPOINT_XFER_INT) {
- tx_endpoint = ep;
- display_ep_found = 1;
- dev_dbg(dev, "%s: found display endpoint\n", __func__);
- }
- }
-
- /*
- * Some iMON receivers have no display. Unfortunately, it seems
- * that SoundGraph recycles device IDs between devices both with
- * and without... :\
- */
- if (context->display == 0) {
- display_ep_found = 0;
- dev_dbg(dev, "%s: device has no display\n", __func__);
- }
-
- /* Input endpoint is mandatory */
- if (!ir_ep_found) {
- dev_err(dev, "%s: no valid input (IR) endpoint found.\n",
- __func__);
- retval = -ENODEV;
- goto free_context;
- }
-
- /* Determine if display requires 6 packets */
- if (display_ep_found) {
- if (usb_match_id(interface, vfd_proto_6p_list))
- vfd_proto_6p = 1;
-
- dev_dbg(dev, "%s: vfd_proto_6p: %d\n",
- __func__, vfd_proto_6p);
- }
-
- driver = kzalloc(sizeof(*driver), GFP_KERNEL);
- if (!driver)
- goto free_context;
-
- rbuf = kmalloc(sizeof(*rbuf), GFP_KERNEL);
- if (!rbuf)
- goto free_driver;
-
- if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) {
- dev_err(dev, "%s: lirc_buffer_init failed\n", __func__);
- goto free_rbuf;
- }
- rx_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!rx_urb)
- goto free_lirc_buf;
- tx_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!tx_urb)
- goto free_rx_urb;
-
- mutex_init(&context->ctx_lock);
- context->vfd_proto_6p = vfd_proto_6p;
-
- strcpy(driver->name, MOD_NAME);
- driver->minor = -1;
- driver->code_length = BUF_CHUNK_SIZE * 8;
- driver->sample_rate = 0;
- driver->features = LIRC_CAN_REC_MODE2;
- driver->data = context;
- driver->rbuf = rbuf;
- driver->set_use_inc = ir_open;
- driver->set_use_dec = ir_close;
- driver->dev = &interface->dev;
- driver->owner = THIS_MODULE;
-
- mutex_lock(&context->ctx_lock);
-
- context->driver = driver;
- /* start out in keyboard mode */
-
- lirc_minor = lirc_register_driver(driver);
- if (lirc_minor < 0) {
- dev_err(dev, "%s: lirc_register_driver failed\n", __func__);
- goto free_tx_urb;
- }
-
- dev_info(dev, "Registered iMON driver (lirc minor: %d)\n",
- lirc_minor);
-
- /* Needed while unregistering! */
- driver->minor = lirc_minor;
-
- context->usbdev = usbdev;
- context->dev_present = 1;
- context->rx_endpoint = rx_endpoint;
- context->rx_urb = rx_urb;
-
- /*
- * tx is used to send characters to lcd/vfd, associate RF
- * remotes, set IR protocol, and maybe more...
- */
- context->tx_endpoint = tx_endpoint;
- context->tx_urb = tx_urb;
-
- if (display_ep_found)
- context->display = 1;
-
- usb_fill_int_urb(context->rx_urb, context->usbdev,
- usb_rcvintpipe(context->usbdev,
- context->rx_endpoint->bEndpointAddress),
- context->usb_rx_buf, sizeof(context->usb_rx_buf),
- usb_rx_callback, context,
- context->rx_endpoint->bInterval);
-
- retval = usb_submit_urb(context->rx_urb, GFP_KERNEL);
- if (retval) {
- dev_err(dev, "usb_submit_urb failed for intf0 (%d)\n", retval);
- goto unregister_lirc;
- }
-
- usb_set_intfdata(interface, context);
-
- if (context->display && ifnum == 0) {
- dev_dbg(dev, "%s: Registering iMON display with sysfs\n",
- __func__);
-
- if (usb_register_dev(interface, &imon_class)) {
- /* Not a fatal error, so ignore */
- dev_info(dev, "%s: could not get a minor number for display\n",
- __func__);
- }
- }
-
- dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n",
- vendor, product, ifnum, usbdev->bus->busnum, usbdev->devnum);
-
- /* Everything went fine. Just unlock and return retval (with is 0) */
- mutex_unlock(&context->ctx_lock);
- goto driver_unlock;
-
-unregister_lirc:
- lirc_unregister_driver(driver->minor);
-
-free_tx_urb:
- mutex_unlock(&context->ctx_lock);
- usb_free_urb(tx_urb);
-
-free_rx_urb:
- usb_free_urb(rx_urb);
-
-free_lirc_buf:
- lirc_buffer_free(rbuf);
-
-free_rbuf:
- kfree(rbuf);
-
-free_driver:
- kfree(driver);
-free_context:
- kfree(context);
- context = NULL;
-
-driver_unlock:
- mutex_unlock(&driver_lock);
-
- return retval;
-}
-
-/**
- * Callback function for USB core API: disconnect
- */
-static void imon_disconnect(struct usb_interface *interface)
-{
- struct imon_context *context;
- int ifnum;
-
- /* prevent races with ir_open()/display_open() */
- mutex_lock(&driver_lock);
-
- context = usb_get_intfdata(interface);
- ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
-
- mutex_lock(&context->ctx_lock);
-
- usb_set_intfdata(interface, NULL);
-
- /* Abort ongoing write */
- if (atomic_read(&context->tx.busy)) {
- usb_kill_urb(context->tx_urb);
- complete(&context->tx.finished);
- }
-
- context->dev_present = 0;
- usb_kill_urb(context->rx_urb);
- if (context->display)
- usb_deregister_dev(interface, &imon_class);
-
- if (!context->ir_isopen && !context->dev_present) {
- deregister_from_lirc(context);
- mutex_unlock(&context->ctx_lock);
- if (!context->display_isopen)
- free_imon_context(context);
- } else
- mutex_unlock(&context->ctx_lock);
-
- mutex_unlock(&driver_lock);
-
- dev_info(&interface->dev, "%s: iMON device (intf%d) disconnected\n",
- __func__, ifnum);
-}
-
-static int imon_suspend(struct usb_interface *intf, pm_message_t message)
-{
- struct imon_context *context = usb_get_intfdata(intf);
-
- usb_kill_urb(context->rx_urb);
-
- return 0;
-}
-
-static int imon_resume(struct usb_interface *intf)
-{
- struct imon_context *context = usb_get_intfdata(intf);
-
- usb_fill_int_urb(context->rx_urb, context->usbdev,
- usb_rcvintpipe(context->usbdev,
- context->rx_endpoint->bEndpointAddress),
- context->usb_rx_buf, sizeof(context->usb_rx_buf),
- usb_rx_callback, context,
- context->rx_endpoint->bInterval);
-
- return usb_submit_urb(context->rx_urb, GFP_ATOMIC);
-}
-
-module_usb_driver(imon_driver);
projects / platform / kernel / linux-rpi.git / commitdiff