+++ /dev/null
-/*
- *
- * Driver for Bluetooth PCMCIA cards with HCI UART interface
- *
- * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
- *
- *
- * 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;
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The initial developer of the original code is David A. Hinds
- * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
- * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
- *
- */
-
-#include <linux/module.h>
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/spinlock.h>
-#include <linux/moduleparam.h>
-
-#include <linux/skbuff.h>
-#include <linux/string.h>
-#include <linux/serial.h>
-#include <linux/serial_reg.h>
-#include <linux/bitops.h>
-#include <linux/io.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/ciscode.h>
-#include <pcmcia/ds.h>
-#include <pcmcia/cisreg.h>
-
-#include <net/bluetooth/bluetooth.h>
-#include <net/bluetooth/hci_core.h>
-
-
-
-/* ======================== Module parameters ======================== */
-
-
-MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
-MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface");
-MODULE_LICENSE("GPL");
-
-
-
-/* ======================== Local structures ======================== */
-
-
-struct btuart_info {
- struct pcmcia_device *p_dev;
-
- struct hci_dev *hdev;
-
- spinlock_t lock; /* For serializing operations */
-
- struct sk_buff_head txq;
- unsigned long tx_state;
-
- unsigned long rx_state;
- unsigned long rx_count;
- struct sk_buff *rx_skb;
-};
-
-
-static int btuart_config(struct pcmcia_device *link);
-static void btuart_release(struct pcmcia_device *link);
-
-static void btuart_detach(struct pcmcia_device *p_dev);
-
-
-/* Maximum baud rate */
-#define SPEED_MAX 115200
-
-/* Default baud rate: 57600, 115200, 230400 or 460800 */
-#define DEFAULT_BAUD_RATE 115200
-
-
-/* Transmit states */
-#define XMIT_SENDING 1
-#define XMIT_WAKEUP 2
-#define XMIT_WAITING 8
-
-/* Receiver states */
-#define RECV_WAIT_PACKET_TYPE 0
-#define RECV_WAIT_EVENT_HEADER 1
-#define RECV_WAIT_ACL_HEADER 2
-#define RECV_WAIT_SCO_HEADER 3
-#define RECV_WAIT_DATA 4
-
-
-
-/* ======================== Interrupt handling ======================== */
-
-
-static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
-{
- int actual = 0;
-
- /* Tx FIFO should be empty */
- if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
- return 0;
-
- /* Fill FIFO with current frame */
- while ((fifo_size-- > 0) && (actual < len)) {
- /* Transmit next byte */
- outb(buf[actual], iobase + UART_TX);
- actual++;
- }
-
- return actual;
-}
-
-
-static void btuart_write_wakeup(struct btuart_info *info)
-{
- if (!info) {
- BT_ERR("Unknown device");
- return;
- }
-
- if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
- set_bit(XMIT_WAKEUP, &(info->tx_state));
- return;
- }
-
- do {
- unsigned int iobase = info->p_dev->resource[0]->start;
- register struct sk_buff *skb;
- int len;
-
- clear_bit(XMIT_WAKEUP, &(info->tx_state));
-
- if (!pcmcia_dev_present(info->p_dev))
- return;
-
- skb = skb_dequeue(&(info->txq));
- if (!skb)
- break;
-
- /* Send frame */
- len = btuart_write(iobase, 16, skb->data, skb->len);
- set_bit(XMIT_WAKEUP, &(info->tx_state));
-
- if (len == skb->len) {
- kfree_skb(skb);
- } else {
- skb_pull(skb, len);
- skb_queue_head(&(info->txq), skb);
- }
-
- info->hdev->stat.byte_tx += len;
-
- } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
-
- clear_bit(XMIT_SENDING, &(info->tx_state));
-}
-
-
-static void btuart_receive(struct btuart_info *info)
-{
- unsigned int iobase;
- int boguscount = 0;
-
- if (!info) {
- BT_ERR("Unknown device");
- return;
- }
-
- iobase = info->p_dev->resource[0]->start;
-
- do {
- info->hdev->stat.byte_rx++;
-
- /* Allocate packet */
- if (!info->rx_skb) {
- info->rx_state = RECV_WAIT_PACKET_TYPE;
- info->rx_count = 0;
- info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
- if (!info->rx_skb) {
- BT_ERR("Can't allocate mem for new packet");
- return;
- }
- }
-
- if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
-
- hci_skb_pkt_type(info->rx_skb) = inb(iobase + UART_RX);
-
- switch (hci_skb_pkt_type(info->rx_skb)) {
-
- case HCI_EVENT_PKT:
- info->rx_state = RECV_WAIT_EVENT_HEADER;
- info->rx_count = HCI_EVENT_HDR_SIZE;
- break;
-
- case HCI_ACLDATA_PKT:
- info->rx_state = RECV_WAIT_ACL_HEADER;
- info->rx_count = HCI_ACL_HDR_SIZE;
- break;
-
- case HCI_SCODATA_PKT:
- info->rx_state = RECV_WAIT_SCO_HEADER;
- info->rx_count = HCI_SCO_HDR_SIZE;
- break;
-
- default:
- /* Unknown packet */
- BT_ERR("Unknown HCI packet with type 0x%02x received",
- hci_skb_pkt_type(info->rx_skb));
- info->hdev->stat.err_rx++;
-
- kfree_skb(info->rx_skb);
- info->rx_skb = NULL;
- break;
-
- }
-
- } else {
-
- skb_put_u8(info->rx_skb, inb(iobase + UART_RX));
- info->rx_count--;
-
- if (info->rx_count == 0) {
-
- int dlen;
- struct hci_event_hdr *eh;
- struct hci_acl_hdr *ah;
- struct hci_sco_hdr *sh;
-
-
- switch (info->rx_state) {
-
- case RECV_WAIT_EVENT_HEADER:
- eh = hci_event_hdr(info->rx_skb);
- info->rx_state = RECV_WAIT_DATA;
- info->rx_count = eh->plen;
- break;
-
- case RECV_WAIT_ACL_HEADER:
- ah = hci_acl_hdr(info->rx_skb);
- dlen = __le16_to_cpu(ah->dlen);
- info->rx_state = RECV_WAIT_DATA;
- info->rx_count = dlen;
- break;
-
- case RECV_WAIT_SCO_HEADER:
- sh = hci_sco_hdr(info->rx_skb);
- info->rx_state = RECV_WAIT_DATA;
- info->rx_count = sh->dlen;
- break;
-
- case RECV_WAIT_DATA:
- hci_recv_frame(info->hdev, info->rx_skb);
- info->rx_skb = NULL;
- break;
-
- }
-
- }
-
- }
-
- /* Make sure we don't stay here too long */
- if (boguscount++ > 16)
- break;
-
- } while (inb(iobase + UART_LSR) & UART_LSR_DR);
-}
-
-
-static irqreturn_t btuart_interrupt(int irq, void *dev_inst)
-{
- struct btuart_info *info = dev_inst;
- unsigned int iobase;
- int boguscount = 0;
- int iir, lsr;
- irqreturn_t r = IRQ_NONE;
-
- if (!info || !info->hdev)
- /* our irq handler is shared */
- return IRQ_NONE;
-
- iobase = info->p_dev->resource[0]->start;
-
- spin_lock(&(info->lock));
-
- iir = inb(iobase + UART_IIR) & UART_IIR_ID;
- while (iir) {
- r = IRQ_HANDLED;
-
- /* Clear interrupt */
- lsr = inb(iobase + UART_LSR);
-
- switch (iir) {
- case UART_IIR_RLSI:
- BT_ERR("RLSI");
- break;
- case UART_IIR_RDI:
- /* Receive interrupt */
- btuart_receive(info);
- break;
- case UART_IIR_THRI:
- if (lsr & UART_LSR_THRE) {
- /* Transmitter ready for data */
- btuart_write_wakeup(info);
- }
- break;
- default:
- BT_ERR("Unhandled IIR=%#x", iir);
- break;
- }
-
- /* Make sure we don't stay here too long */
- if (boguscount++ > 100)
- break;
-
- iir = inb(iobase + UART_IIR) & UART_IIR_ID;
-
- }
-
- spin_unlock(&(info->lock));
-
- return r;
-}
-
-
-static void btuart_change_speed(struct btuart_info *info,
- unsigned int speed)
-{
- unsigned long flags;
- unsigned int iobase;
- int fcr; /* FIFO control reg */
- int lcr; /* Line control reg */
- int divisor;
-
- if (!info) {
- BT_ERR("Unknown device");
- return;
- }
-
- iobase = info->p_dev->resource[0]->start;
-
- spin_lock_irqsave(&(info->lock), flags);
-
- /* Turn off interrupts */
- outb(0, iobase + UART_IER);
-
- divisor = SPEED_MAX / speed;
-
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
-
- /*
- * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
- * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
- * about this timeout since it will always be fast enough.
- */
-
- if (speed < 38400)
- fcr |= UART_FCR_TRIGGER_1;
- else
- fcr |= UART_FCR_TRIGGER_14;
-
- /* Bluetooth cards use 8N1 */
- lcr = UART_LCR_WLEN8;
-
- outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
- outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
- outb(divisor >> 8, iobase + UART_DLM);
- outb(lcr, iobase + UART_LCR); /* Set 8N1 */
- outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
-
- /* Turn on interrupts */
- outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
-
- spin_unlock_irqrestore(&(info->lock), flags);
-}
-
-
-
-/* ======================== HCI interface ======================== */
-
-
-static int btuart_hci_flush(struct hci_dev *hdev)
-{
- struct btuart_info *info = hci_get_drvdata(hdev);
-
- /* Drop TX queue */
- skb_queue_purge(&(info->txq));
-
- return 0;
-}
-
-
-static int btuart_hci_open(struct hci_dev *hdev)
-{
- return 0;
-}
-
-
-static int btuart_hci_close(struct hci_dev *hdev)
-{
- btuart_hci_flush(hdev);
-
- return 0;
-}
-
-
-static int btuart_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
-{
- struct btuart_info *info = hci_get_drvdata(hdev);
-
- switch (hci_skb_pkt_type(skb)) {
- case HCI_COMMAND_PKT:
- hdev->stat.cmd_tx++;
- break;
- case HCI_ACLDATA_PKT:
- hdev->stat.acl_tx++;
- break;
- case HCI_SCODATA_PKT:
- hdev->stat.sco_tx++;
- break;
- }
-
- /* Prepend skb with frame type */
- memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
- skb_queue_tail(&(info->txq), skb);
-
- btuart_write_wakeup(info);
-
- return 0;
-}
-
-
-
-/* ======================== Card services HCI interaction ======================== */
-
-
-static int btuart_open(struct btuart_info *info)
-{
- unsigned long flags;
- unsigned int iobase = info->p_dev->resource[0]->start;
- struct hci_dev *hdev;
-
- spin_lock_init(&(info->lock));
-
- skb_queue_head_init(&(info->txq));
-
- info->rx_state = RECV_WAIT_PACKET_TYPE;
- info->rx_count = 0;
- info->rx_skb = NULL;
-
- /* Initialize HCI device */
- hdev = hci_alloc_dev();
- if (!hdev) {
- BT_ERR("Can't allocate HCI device");
- return -ENOMEM;
- }
-
- info->hdev = hdev;
-
- hdev->bus = HCI_PCCARD;
- hci_set_drvdata(hdev, info);
- SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
-
- hdev->open = btuart_hci_open;
- hdev->close = btuart_hci_close;
- hdev->flush = btuart_hci_flush;
- hdev->send = btuart_hci_send_frame;
-
- spin_lock_irqsave(&(info->lock), flags);
-
- /* Reset UART */
- outb(0, iobase + UART_MCR);
-
- /* Turn off interrupts */
- outb(0, iobase + UART_IER);
-
- /* Initialize UART */
- outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
- outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
-
- /* Turn on interrupts */
- // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
-
- spin_unlock_irqrestore(&(info->lock), flags);
-
- btuart_change_speed(info, DEFAULT_BAUD_RATE);
-
- /* Timeout before it is safe to send the first HCI packet */
- msleep(1000);
-
- /* Register HCI device */
- if (hci_register_dev(hdev) < 0) {
- BT_ERR("Can't register HCI device");
- info->hdev = NULL;
- hci_free_dev(hdev);
- return -ENODEV;
- }
-
- return 0;
-}
-
-
-static int btuart_close(struct btuart_info *info)
-{
- unsigned long flags;
- unsigned int iobase = info->p_dev->resource[0]->start;
- struct hci_dev *hdev = info->hdev;
-
- if (!hdev)
- return -ENODEV;
-
- btuart_hci_close(hdev);
-
- spin_lock_irqsave(&(info->lock), flags);
-
- /* Reset UART */
- outb(0, iobase + UART_MCR);
-
- /* Turn off interrupts */
- outb(0, iobase + UART_IER);
-
- spin_unlock_irqrestore(&(info->lock), flags);
-
- hci_unregister_dev(hdev);
- hci_free_dev(hdev);
-
- return 0;
-}
-
-static int btuart_probe(struct pcmcia_device *link)
-{
- struct btuart_info *info;
-
- /* Create new info device */
- info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- info->p_dev = link;
- link->priv = info;
-
- link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
- CONF_AUTO_SET_IO;
-
- return btuart_config(link);
-}
-
-
-static void btuart_detach(struct pcmcia_device *link)
-{
- btuart_release(link);
-}
-
-static int btuart_check_config(struct pcmcia_device *p_dev, void *priv_data)
-{
- int *try = priv_data;
-
- if (!try)
- p_dev->io_lines = 16;
-
- if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
- return -EINVAL;
-
- p_dev->resource[0]->end = 8;
- p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
- p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
-
- return pcmcia_request_io(p_dev);
-}
-
-static int btuart_check_config_notpicky(struct pcmcia_device *p_dev,
- void *priv_data)
-{
- static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
- int j;
-
- if (p_dev->io_lines > 3)
- return -ENODEV;
-
- p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
- p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
- p_dev->resource[0]->end = 8;
-
- for (j = 0; j < 5; j++) {
- p_dev->resource[0]->start = base[j];
- p_dev->io_lines = base[j] ? 16 : 3;
- if (!pcmcia_request_io(p_dev))
- return 0;
- }
- return -ENODEV;
-}
-
-static int btuart_config(struct pcmcia_device *link)
-{
- struct btuart_info *info = link->priv;
- int i;
- int try;
-
- /* First pass: look for a config entry that looks normal.
- * Two tries: without IO aliases, then with aliases
- */
- for (try = 0; try < 2; try++)
- if (!pcmcia_loop_config(link, btuart_check_config, &try))
- goto found_port;
-
- /* Second pass: try to find an entry that isn't picky about
- * its base address, then try to grab any standard serial port
- * address, and finally try to get any free port.
- */
- if (!pcmcia_loop_config(link, btuart_check_config_notpicky, NULL))
- goto found_port;
-
- BT_ERR("No usable port range found");
- goto failed;
-
-found_port:
- i = pcmcia_request_irq(link, btuart_interrupt);
- if (i != 0)
- goto failed;
-
- i = pcmcia_enable_device(link);
- if (i != 0)
- goto failed;
-
- if (btuart_open(info) != 0)
- goto failed;
-
- return 0;
-
-failed:
- btuart_release(link);
- return -ENODEV;
-}
-
-
-static void btuart_release(struct pcmcia_device *link)
-{
- struct btuart_info *info = link->priv;
-
- btuart_close(info);
-
- pcmcia_disable_device(link);
-}
-
-static const struct pcmcia_device_id btuart_ids[] = {
- /* don't use this driver. Use serial_cs + hci_uart instead */
- PCMCIA_DEVICE_NULL
-};
-MODULE_DEVICE_TABLE(pcmcia, btuart_ids);
-
-static struct pcmcia_driver btuart_driver = {
- .owner = THIS_MODULE,
- .name = "btuart_cs",
- .probe = btuart_probe,
- .remove = btuart_detach,
- .id_table = btuart_ids,
-};
-module_pcmcia_driver(btuart_driver);
projects / platform / kernel / linux-starfive.git / commitdiff