forked from Minki/linux
66e8b6c31b
This patch removes the unused bt_dump() function and it also removes its BT_DMP macro. It also unexports the hci_dev_get(), hci_send_cmd() and hci_si_event() functions. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
592 lines
13 KiB
C
592 lines
13 KiB
C
/*
|
|
BlueZ - Bluetooth protocol stack for Linux
|
|
Copyright (C) 2000-2001 Qualcomm Incorporated
|
|
|
|
Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.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;
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
|
|
IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
|
|
CLAIM, OR ANY SPECIAL 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.
|
|
|
|
ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
|
|
COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
|
|
SOFTWARE IS DISCLAIMED.
|
|
*/
|
|
|
|
/*
|
|
* Bluetooth HCI UART driver.
|
|
*
|
|
* $Id: hci_ldisc.c,v 1.5 2002/10/02 18:37:20 maxk Exp $
|
|
*/
|
|
#define VERSION "2.1"
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/types.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/poll.h>
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/ioctl.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <net/bluetooth/bluetooth.h>
|
|
#include <net/bluetooth/hci_core.h>
|
|
|
|
#include "hci_uart.h"
|
|
|
|
#ifndef CONFIG_BT_HCIUART_DEBUG
|
|
#undef BT_DBG
|
|
#define BT_DBG( A... )
|
|
#endif
|
|
|
|
static int reset = 0;
|
|
|
|
static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
|
|
|
|
int hci_uart_register_proto(struct hci_uart_proto *p)
|
|
{
|
|
if (p->id >= HCI_UART_MAX_PROTO)
|
|
return -EINVAL;
|
|
|
|
if (hup[p->id])
|
|
return -EEXIST;
|
|
|
|
hup[p->id] = p;
|
|
return 0;
|
|
}
|
|
|
|
int hci_uart_unregister_proto(struct hci_uart_proto *p)
|
|
{
|
|
if (p->id >= HCI_UART_MAX_PROTO)
|
|
return -EINVAL;
|
|
|
|
if (!hup[p->id])
|
|
return -EINVAL;
|
|
|
|
hup[p->id] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static struct hci_uart_proto *hci_uart_get_proto(unsigned int id)
|
|
{
|
|
if (id >= HCI_UART_MAX_PROTO)
|
|
return NULL;
|
|
return hup[id];
|
|
}
|
|
|
|
static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type)
|
|
{
|
|
struct hci_dev *hdev = hu->hdev;
|
|
|
|
/* Update HCI stat counters */
|
|
switch (pkt_type) {
|
|
case HCI_COMMAND_PKT:
|
|
hdev->stat.cmd_tx++;
|
|
break;
|
|
|
|
case HCI_ACLDATA_PKT:
|
|
hdev->stat.acl_tx++;
|
|
break;
|
|
|
|
case HCI_SCODATA_PKT:
|
|
hdev->stat.cmd_tx++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu)
|
|
{
|
|
struct sk_buff *skb = hu->tx_skb;
|
|
if (!skb)
|
|
skb = hu->proto->dequeue(hu);
|
|
else
|
|
hu->tx_skb = NULL;
|
|
return skb;
|
|
}
|
|
|
|
int hci_uart_tx_wakeup(struct hci_uart *hu)
|
|
{
|
|
struct tty_struct *tty = hu->tty;
|
|
struct hci_dev *hdev = hu->hdev;
|
|
struct sk_buff *skb;
|
|
|
|
if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
|
|
set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
|
|
return 0;
|
|
}
|
|
|
|
BT_DBG("");
|
|
|
|
restart:
|
|
clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
|
|
|
|
while ((skb = hci_uart_dequeue(hu))) {
|
|
int len;
|
|
|
|
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
|
|
len = tty->driver->write(tty, skb->data, skb->len);
|
|
hdev->stat.byte_tx += len;
|
|
|
|
skb_pull(skb, len);
|
|
if (skb->len) {
|
|
hu->tx_skb = skb;
|
|
break;
|
|
}
|
|
|
|
hci_uart_tx_complete(hu, skb->pkt_type);
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
|
|
goto restart;
|
|
|
|
clear_bit(HCI_UART_SENDING, &hu->tx_state);
|
|
return 0;
|
|
}
|
|
|
|
/* ------- Interface to HCI layer ------ */
|
|
/* Initialize device */
|
|
static int hci_uart_open(struct hci_dev *hdev)
|
|
{
|
|
BT_DBG("%s %p", hdev->name, hdev);
|
|
|
|
/* Nothing to do for UART driver */
|
|
|
|
set_bit(HCI_RUNNING, &hdev->flags);
|
|
return 0;
|
|
}
|
|
|
|
/* Reset device */
|
|
static int hci_uart_flush(struct hci_dev *hdev)
|
|
{
|
|
struct hci_uart *hu = (struct hci_uart *) hdev->driver_data;
|
|
struct tty_struct *tty = hu->tty;
|
|
|
|
BT_DBG("hdev %p tty %p", hdev, tty);
|
|
|
|
if (hu->tx_skb) {
|
|
kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
|
|
}
|
|
|
|
/* Flush any pending characters in the driver and discipline. */
|
|
tty_ldisc_flush(tty);
|
|
if (tty->driver->flush_buffer)
|
|
tty->driver->flush_buffer(tty);
|
|
|
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
|
|
hu->proto->flush(hu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Close device */
|
|
static int hci_uart_close(struct hci_dev *hdev)
|
|
{
|
|
BT_DBG("hdev %p", hdev);
|
|
|
|
if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
|
|
return 0;
|
|
|
|
hci_uart_flush(hdev);
|
|
return 0;
|
|
}
|
|
|
|
/* Send frames from HCI layer */
|
|
static int hci_uart_send_frame(struct sk_buff *skb)
|
|
{
|
|
struct hci_dev* hdev = (struct hci_dev *) skb->dev;
|
|
struct tty_struct *tty;
|
|
struct hci_uart *hu;
|
|
|
|
if (!hdev) {
|
|
BT_ERR("Frame for uknown device (hdev=NULL)");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!test_bit(HCI_RUNNING, &hdev->flags))
|
|
return -EBUSY;
|
|
|
|
hu = (struct hci_uart *) hdev->driver_data;
|
|
tty = hu->tty;
|
|
|
|
BT_DBG("%s: type %d len %d", hdev->name, skb->pkt_type, skb->len);
|
|
|
|
hu->proto->enqueue(hu, skb);
|
|
|
|
hci_uart_tx_wakeup(hu);
|
|
return 0;
|
|
}
|
|
|
|
static void hci_uart_destruct(struct hci_dev *hdev)
|
|
{
|
|
struct hci_uart *hu;
|
|
|
|
if (!hdev) return;
|
|
|
|
BT_DBG("%s", hdev->name);
|
|
|
|
hu = (struct hci_uart *) hdev->driver_data;
|
|
kfree(hu);
|
|
}
|
|
|
|
/* ------ LDISC part ------ */
|
|
/* hci_uart_tty_open
|
|
*
|
|
* Called when line discipline changed to HCI_UART.
|
|
*
|
|
* Arguments:
|
|
* tty pointer to tty info structure
|
|
* Return Value:
|
|
* 0 if success, otherwise error code
|
|
*/
|
|
static int hci_uart_tty_open(struct tty_struct *tty)
|
|
{
|
|
struct hci_uart *hu = (void *) tty->disc_data;
|
|
|
|
BT_DBG("tty %p", tty);
|
|
|
|
if (hu)
|
|
return -EEXIST;
|
|
|
|
if (!(hu = kmalloc(sizeof(struct hci_uart), GFP_KERNEL))) {
|
|
BT_ERR("Can't allocate controll structure");
|
|
return -ENFILE;
|
|
}
|
|
memset(hu, 0, sizeof(struct hci_uart));
|
|
|
|
tty->disc_data = hu;
|
|
hu->tty = tty;
|
|
|
|
spin_lock_init(&hu->rx_lock);
|
|
|
|
/* Flush any pending characters in the driver and line discipline. */
|
|
/* FIXME: why is this needed. Note don't use ldisc_ref here as the
|
|
open path is before the ldisc is referencable */
|
|
if (tty->ldisc.flush_buffer)
|
|
tty->ldisc.flush_buffer(tty);
|
|
|
|
if (tty->driver->flush_buffer)
|
|
tty->driver->flush_buffer(tty);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* hci_uart_tty_close()
|
|
*
|
|
* Called when the line discipline is changed to something
|
|
* else, the tty is closed, or the tty detects a hangup.
|
|
*/
|
|
static void hci_uart_tty_close(struct tty_struct *tty)
|
|
{
|
|
struct hci_uart *hu = (void *)tty->disc_data;
|
|
|
|
BT_DBG("tty %p", tty);
|
|
|
|
/* Detach from the tty */
|
|
tty->disc_data = NULL;
|
|
|
|
if (hu) {
|
|
struct hci_dev *hdev = hu->hdev;
|
|
hci_uart_close(hdev);
|
|
|
|
if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
|
|
hu->proto->close(hu);
|
|
hci_unregister_dev(hdev);
|
|
hci_free_dev(hdev);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* hci_uart_tty_wakeup()
|
|
*
|
|
* Callback for transmit wakeup. Called when low level
|
|
* device driver can accept more send data.
|
|
*
|
|
* Arguments: tty pointer to associated tty instance data
|
|
* Return Value: None
|
|
*/
|
|
static void hci_uart_tty_wakeup(struct tty_struct *tty)
|
|
{
|
|
struct hci_uart *hu = (void *)tty->disc_data;
|
|
|
|
BT_DBG("");
|
|
|
|
if (!hu)
|
|
return;
|
|
|
|
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
|
|
|
|
if (tty != hu->tty)
|
|
return;
|
|
|
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
|
|
hci_uart_tx_wakeup(hu);
|
|
}
|
|
|
|
/* hci_uart_tty_room()
|
|
*
|
|
* Callback function from tty driver. Return the amount of
|
|
* space left in the receiver's buffer to decide if remote
|
|
* transmitter is to be throttled.
|
|
*
|
|
* Arguments: tty pointer to associated tty instance data
|
|
* Return Value: number of bytes left in receive buffer
|
|
*/
|
|
static int hci_uart_tty_room (struct tty_struct *tty)
|
|
{
|
|
return 65536;
|
|
}
|
|
|
|
/* hci_uart_tty_receive()
|
|
*
|
|
* Called by tty low level driver when receive data is
|
|
* available.
|
|
*
|
|
* Arguments: tty pointer to tty isntance data
|
|
* data pointer to received data
|
|
* flags pointer to flags for data
|
|
* count count of received data in bytes
|
|
*
|
|
* Return Value: None
|
|
*/
|
|
static void hci_uart_tty_receive(struct tty_struct *tty, const __u8 *data, char *flags, int count)
|
|
{
|
|
struct hci_uart *hu = (void *)tty->disc_data;
|
|
|
|
if (!hu || tty != hu->tty)
|
|
return;
|
|
|
|
if (!test_bit(HCI_UART_PROTO_SET, &hu->flags))
|
|
return;
|
|
|
|
spin_lock(&hu->rx_lock);
|
|
hu->proto->recv(hu, (void *) data, count);
|
|
hu->hdev->stat.byte_rx += count;
|
|
spin_unlock(&hu->rx_lock);
|
|
|
|
if (test_and_clear_bit(TTY_THROTTLED,&tty->flags) && tty->driver->unthrottle)
|
|
tty->driver->unthrottle(tty);
|
|
}
|
|
|
|
static int hci_uart_register_dev(struct hci_uart *hu)
|
|
{
|
|
struct hci_dev *hdev;
|
|
|
|
BT_DBG("");
|
|
|
|
/* Initialize and register HCI device */
|
|
hdev = hci_alloc_dev();
|
|
if (!hdev) {
|
|
BT_ERR("Can't allocate HCI device");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hu->hdev = hdev;
|
|
|
|
hdev->type = HCI_UART;
|
|
hdev->driver_data = hu;
|
|
|
|
hdev->open = hci_uart_open;
|
|
hdev->close = hci_uart_close;
|
|
hdev->flush = hci_uart_flush;
|
|
hdev->send = hci_uart_send_frame;
|
|
hdev->destruct = hci_uart_destruct;
|
|
|
|
hdev->owner = THIS_MODULE;
|
|
|
|
if (reset)
|
|
set_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks);
|
|
|
|
if (hci_register_dev(hdev) < 0) {
|
|
BT_ERR("Can't register HCI device");
|
|
hci_free_dev(hdev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hci_uart_set_proto(struct hci_uart *hu, int id)
|
|
{
|
|
struct hci_uart_proto *p;
|
|
int err;
|
|
|
|
p = hci_uart_get_proto(id);
|
|
if (!p)
|
|
return -EPROTONOSUPPORT;
|
|
|
|
err = p->open(hu);
|
|
if (err)
|
|
return err;
|
|
|
|
hu->proto = p;
|
|
|
|
err = hci_uart_register_dev(hu);
|
|
if (err) {
|
|
p->close(hu);
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* hci_uart_tty_ioctl()
|
|
*
|
|
* Process IOCTL system call for the tty device.
|
|
*
|
|
* Arguments:
|
|
*
|
|
* tty pointer to tty instance data
|
|
* file pointer to open file object for device
|
|
* cmd IOCTL command code
|
|
* arg argument for IOCTL call (cmd dependent)
|
|
*
|
|
* Return Value: Command dependent
|
|
*/
|
|
static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct hci_uart *hu = (void *)tty->disc_data;
|
|
int err = 0;
|
|
|
|
BT_DBG("");
|
|
|
|
/* Verify the status of the device */
|
|
if (!hu)
|
|
return -EBADF;
|
|
|
|
switch (cmd) {
|
|
case HCIUARTSETPROTO:
|
|
if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) {
|
|
err = hci_uart_set_proto(hu, arg);
|
|
if (err) {
|
|
clear_bit(HCI_UART_PROTO_SET, &hu->flags);
|
|
return err;
|
|
}
|
|
tty->low_latency = 1;
|
|
} else
|
|
return -EBUSY;
|
|
|
|
case HCIUARTGETPROTO:
|
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
|
|
return hu->proto->id;
|
|
return -EUNATCH;
|
|
|
|
default:
|
|
err = n_tty_ioctl(tty, file, cmd, arg);
|
|
break;
|
|
};
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* We don't provide read/write/poll interface for user space.
|
|
*/
|
|
static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, unsigned char __user *buf, size_t nr)
|
|
{
|
|
return 0;
|
|
}
|
|
static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, const unsigned char *data, size_t count)
|
|
{
|
|
return 0;
|
|
}
|
|
static unsigned int hci_uart_tty_poll(struct tty_struct *tty, struct file *filp, poll_table *wait)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_BT_HCIUART_H4
|
|
int h4_init(void);
|
|
int h4_deinit(void);
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_BCSP
|
|
int bcsp_init(void);
|
|
int bcsp_deinit(void);
|
|
#endif
|
|
|
|
static int __init hci_uart_init(void)
|
|
{
|
|
static struct tty_ldisc hci_uart_ldisc;
|
|
int err;
|
|
|
|
BT_INFO("HCI UART driver ver %s", VERSION);
|
|
|
|
/* Register the tty discipline */
|
|
|
|
memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc));
|
|
hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
|
|
hci_uart_ldisc.name = "n_hci";
|
|
hci_uart_ldisc.open = hci_uart_tty_open;
|
|
hci_uart_ldisc.close = hci_uart_tty_close;
|
|
hci_uart_ldisc.read = hci_uart_tty_read;
|
|
hci_uart_ldisc.write = hci_uart_tty_write;
|
|
hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
|
|
hci_uart_ldisc.poll = hci_uart_tty_poll;
|
|
hci_uart_ldisc.receive_room= hci_uart_tty_room;
|
|
hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
|
|
hci_uart_ldisc.write_wakeup= hci_uart_tty_wakeup;
|
|
hci_uart_ldisc.owner = THIS_MODULE;
|
|
|
|
if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
|
|
BT_ERR("HCI line discipline registration failed. (%d)", err);
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_BT_HCIUART_H4
|
|
h4_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_BCSP
|
|
bcsp_init();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit hci_uart_exit(void)
|
|
{
|
|
int err;
|
|
|
|
#ifdef CONFIG_BT_HCIUART_H4
|
|
h4_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_BCSP
|
|
bcsp_deinit();
|
|
#endif
|
|
|
|
/* Release tty registration of line discipline */
|
|
if ((err = tty_unregister_ldisc(N_HCI)))
|
|
BT_ERR("Can't unregister HCI line discipline (%d)", err);
|
|
}
|
|
|
|
module_init(hci_uart_init);
|
|
module_exit(hci_uart_exit);
|
|
|
|
module_param(reset, bool, 0644);
|
|
MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
|
|
|
|
MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
|
|
MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
|
|
MODULE_VERSION(VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_LDISC(N_HCI);
|