871 строка
19 KiB
C
871 строка
19 KiB
C
/*
|
|
*
|
|
* Bluetooth HCI UART driver
|
|
*
|
|
* Copyright (C) 2000-2001 Qualcomm Incorporated
|
|
* Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
|
|
* Copyright (C) 2004-2005 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 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
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.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 <linux/firmware.h>
|
|
|
|
#include <net/bluetooth/bluetooth.h>
|
|
#include <net/bluetooth/hci_core.h>
|
|
|
|
#include "btintel.h"
|
|
#include "btbcm.h"
|
|
#include "hci_uart.h"
|
|
|
|
#define VERSION "2.3"
|
|
|
|
static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO];
|
|
|
|
int hci_uart_register_proto(const struct hci_uart_proto *p)
|
|
{
|
|
if (p->id >= HCI_UART_MAX_PROTO)
|
|
return -EINVAL;
|
|
|
|
if (hup[p->id])
|
|
return -EEXIST;
|
|
|
|
hup[p->id] = p;
|
|
|
|
BT_INFO("HCI UART protocol %s registered", p->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int hci_uart_unregister_proto(const 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 const 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.sco_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)
|
|
{
|
|
if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) {
|
|
set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state);
|
|
return 0;
|
|
}
|
|
|
|
BT_DBG("");
|
|
|
|
schedule_work(&hu->write_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hci_uart_write_work(struct work_struct *work)
|
|
{
|
|
struct hci_uart *hu = container_of(work, struct hci_uart, write_work);
|
|
struct tty_struct *tty = hu->tty;
|
|
struct hci_dev *hdev = hu->hdev;
|
|
struct sk_buff *skb;
|
|
|
|
/* REVISIT: should we cope with bad skbs or ->write() returning
|
|
* and error value ?
|
|
*/
|
|
|
|
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->ops->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, hci_skb_pkt_type(skb));
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state))
|
|
goto restart;
|
|
|
|
clear_bit(HCI_UART_SENDING, &hu->tx_state);
|
|
}
|
|
|
|
static void hci_uart_init_work(struct work_struct *work)
|
|
{
|
|
struct hci_uart *hu = container_of(work, struct hci_uart, init_ready);
|
|
int err;
|
|
|
|
if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
|
|
return;
|
|
|
|
err = hci_register_dev(hu->hdev);
|
|
if (err < 0) {
|
|
BT_ERR("Can't register HCI device");
|
|
hci_free_dev(hu->hdev);
|
|
hu->hdev = NULL;
|
|
hu->proto->close(hu);
|
|
}
|
|
|
|
set_bit(HCI_UART_REGISTERED, &hu->flags);
|
|
}
|
|
|
|
int hci_uart_init_ready(struct hci_uart *hu)
|
|
{
|
|
if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
|
|
return -EALREADY;
|
|
|
|
schedule_work(&hu->init_ready);
|
|
|
|
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 */
|
|
return 0;
|
|
}
|
|
|
|
/* Reset device */
|
|
static int hci_uart_flush(struct hci_dev *hdev)
|
|
{
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
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);
|
|
tty_driver_flush_buffer(tty);
|
|
|
|
if (test_bit(HCI_UART_PROTO_READY, &hu->flags))
|
|
hu->proto->flush(hu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Close device */
|
|
static int hci_uart_close(struct hci_dev *hdev)
|
|
{
|
|
BT_DBG("hdev %p", hdev);
|
|
|
|
hci_uart_flush(hdev);
|
|
hdev->flush = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* Send frames from HCI layer */
|
|
static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
|
|
{
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
|
|
BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb),
|
|
skb->len);
|
|
|
|
hu->proto->enqueue(hu, skb);
|
|
|
|
hci_uart_tx_wakeup(hu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Flow control or un-flow control the device */
|
|
void hci_uart_set_flow_control(struct hci_uart *hu, bool enable)
|
|
{
|
|
struct tty_struct *tty = hu->tty;
|
|
struct ktermios ktermios;
|
|
int status;
|
|
unsigned int set = 0;
|
|
unsigned int clear = 0;
|
|
|
|
if (enable) {
|
|
/* Disable hardware flow control */
|
|
ktermios = tty->termios;
|
|
ktermios.c_cflag &= ~CRTSCTS;
|
|
status = tty_set_termios(tty, &ktermios);
|
|
BT_DBG("Disabling hardware flow control: %s",
|
|
status ? "failed" : "success");
|
|
|
|
/* Clear RTS to prevent the device from sending */
|
|
/* Most UARTs need OUT2 to enable interrupts */
|
|
status = tty->driver->ops->tiocmget(tty);
|
|
BT_DBG("Current tiocm 0x%x", status);
|
|
|
|
set &= ~(TIOCM_OUT2 | TIOCM_RTS);
|
|
clear = ~set;
|
|
set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
|
|
TIOCM_OUT2 | TIOCM_LOOP;
|
|
clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
|
|
TIOCM_OUT2 | TIOCM_LOOP;
|
|
status = tty->driver->ops->tiocmset(tty, set, clear);
|
|
BT_DBG("Clearing RTS: %s", status ? "failed" : "success");
|
|
} else {
|
|
/* Set RTS to allow the device to send again */
|
|
status = tty->driver->ops->tiocmget(tty);
|
|
BT_DBG("Current tiocm 0x%x", status);
|
|
|
|
set |= (TIOCM_OUT2 | TIOCM_RTS);
|
|
clear = ~set;
|
|
set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
|
|
TIOCM_OUT2 | TIOCM_LOOP;
|
|
clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 |
|
|
TIOCM_OUT2 | TIOCM_LOOP;
|
|
status = tty->driver->ops->tiocmset(tty, set, clear);
|
|
BT_DBG("Setting RTS: %s", status ? "failed" : "success");
|
|
|
|
/* Re-enable hardware flow control */
|
|
ktermios = tty->termios;
|
|
ktermios.c_cflag |= CRTSCTS;
|
|
status = tty_set_termios(tty, &ktermios);
|
|
BT_DBG("Enabling hardware flow control: %s",
|
|
status ? "failed" : "success");
|
|
}
|
|
}
|
|
|
|
void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed,
|
|
unsigned int oper_speed)
|
|
{
|
|
hu->init_speed = init_speed;
|
|
hu->oper_speed = oper_speed;
|
|
}
|
|
|
|
void hci_uart_init_tty(struct hci_uart *hu)
|
|
{
|
|
struct tty_struct *tty = hu->tty;
|
|
struct ktermios ktermios;
|
|
|
|
/* Bring the UART into a known 8 bits no parity hw fc state */
|
|
ktermios = tty->termios;
|
|
ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP |
|
|
INLCR | IGNCR | ICRNL | IXON);
|
|
ktermios.c_oflag &= ~OPOST;
|
|
ktermios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
|
|
ktermios.c_cflag &= ~(CSIZE | PARENB);
|
|
ktermios.c_cflag |= CS8;
|
|
ktermios.c_cflag |= CRTSCTS;
|
|
|
|
/* tty_set_termios() return not checked as it is always 0 */
|
|
tty_set_termios(tty, &ktermios);
|
|
}
|
|
|
|
void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed)
|
|
{
|
|
struct tty_struct *tty = hu->tty;
|
|
struct ktermios ktermios;
|
|
|
|
ktermios = tty->termios;
|
|
ktermios.c_cflag &= ~CBAUD;
|
|
tty_termios_encode_baud_rate(&ktermios, speed, speed);
|
|
|
|
/* tty_set_termios() return not checked as it is always 0 */
|
|
tty_set_termios(tty, &ktermios);
|
|
|
|
BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name,
|
|
tty->termios.c_ispeed, tty->termios.c_ospeed);
|
|
}
|
|
|
|
static int hci_uart_setup(struct hci_dev *hdev)
|
|
{
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
struct hci_rp_read_local_version *ver;
|
|
struct sk_buff *skb;
|
|
unsigned int speed;
|
|
int err;
|
|
|
|
/* Init speed if any */
|
|
if (hu->init_speed)
|
|
speed = hu->init_speed;
|
|
else if (hu->proto->init_speed)
|
|
speed = hu->proto->init_speed;
|
|
else
|
|
speed = 0;
|
|
|
|
if (speed)
|
|
hci_uart_set_baudrate(hu, speed);
|
|
|
|
/* Operational speed if any */
|
|
if (hu->oper_speed)
|
|
speed = hu->oper_speed;
|
|
else if (hu->proto->oper_speed)
|
|
speed = hu->proto->oper_speed;
|
|
else
|
|
speed = 0;
|
|
|
|
if (hu->proto->set_baudrate && speed) {
|
|
err = hu->proto->set_baudrate(hu, speed);
|
|
if (!err)
|
|
hci_uart_set_baudrate(hu, speed);
|
|
}
|
|
|
|
if (hu->proto->setup)
|
|
return hu->proto->setup(hu);
|
|
|
|
if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags))
|
|
return 0;
|
|
|
|
skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
|
|
HCI_INIT_TIMEOUT);
|
|
if (IS_ERR(skb)) {
|
|
BT_ERR("%s: Reading local version information failed (%ld)",
|
|
hdev->name, PTR_ERR(skb));
|
|
return 0;
|
|
}
|
|
|
|
if (skb->len != sizeof(*ver)) {
|
|
BT_ERR("%s: Event length mismatch for version information",
|
|
hdev->name);
|
|
goto done;
|
|
}
|
|
|
|
ver = (struct hci_rp_read_local_version *)skb->data;
|
|
|
|
switch (le16_to_cpu(ver->manufacturer)) {
|
|
#ifdef CONFIG_BT_HCIUART_INTEL
|
|
case 2:
|
|
hdev->set_bdaddr = btintel_set_bdaddr;
|
|
btintel_check_bdaddr(hdev);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_BCM
|
|
case 15:
|
|
hdev->set_bdaddr = btbcm_set_bdaddr;
|
|
btbcm_check_bdaddr(hdev);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
done:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
/* ------ 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;
|
|
|
|
BT_DBG("tty %p", tty);
|
|
|
|
/* Error if the tty has no write op instead of leaving an exploitable
|
|
hole */
|
|
if (tty->ops->write == NULL)
|
|
return -EOPNOTSUPP;
|
|
|
|
hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL);
|
|
if (!hu) {
|
|
BT_ERR("Can't allocate control structure");
|
|
return -ENFILE;
|
|
}
|
|
|
|
tty->disc_data = hu;
|
|
hu->tty = tty;
|
|
tty->receive_room = 65536;
|
|
|
|
INIT_WORK(&hu->init_ready, hci_uart_init_work);
|
|
INIT_WORK(&hu->write_work, hci_uart_write_work);
|
|
|
|
/* Flush any pending characters in the driver */
|
|
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 = tty->disc_data;
|
|
struct hci_dev *hdev;
|
|
|
|
BT_DBG("tty %p", tty);
|
|
|
|
/* Detach from the tty */
|
|
tty->disc_data = NULL;
|
|
|
|
if (!hu)
|
|
return;
|
|
|
|
hdev = hu->hdev;
|
|
if (hdev)
|
|
hci_uart_close(hdev);
|
|
|
|
cancel_work_sync(&hu->write_work);
|
|
|
|
if (test_and_clear_bit(HCI_UART_PROTO_READY, &hu->flags)) {
|
|
if (hdev) {
|
|
if (test_bit(HCI_UART_REGISTERED, &hu->flags))
|
|
hci_unregister_dev(hdev);
|
|
hci_free_dev(hdev);
|
|
}
|
|
hu->proto->close(hu);
|
|
}
|
|
clear_bit(HCI_UART_PROTO_SET, &hu->flags);
|
|
|
|
kfree(hu);
|
|
}
|
|
|
|
/* 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 = 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_READY, &hu->flags))
|
|
hci_uart_tx_wakeup(hu);
|
|
}
|
|
|
|
/* 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 = tty->disc_data;
|
|
|
|
if (!hu || tty != hu->tty)
|
|
return;
|
|
|
|
if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
|
|
return;
|
|
|
|
/* It does not need a lock here as it is already protected by a mutex in
|
|
* tty caller
|
|
*/
|
|
hu->proto->recv(hu, data, count);
|
|
|
|
if (hu->hdev)
|
|
hu->hdev->stat.byte_rx += count;
|
|
|
|
tty_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->bus = HCI_UART;
|
|
hci_set_drvdata(hdev, hu);
|
|
|
|
/* Only when vendor specific setup callback is provided, consider
|
|
* the manufacturer information valid. This avoids filling in the
|
|
* value for Ericsson when nothing is specified.
|
|
*/
|
|
if (hu->proto->setup)
|
|
hdev->manufacturer = hu->proto->manufacturer;
|
|
|
|
hdev->open = hci_uart_open;
|
|
hdev->close = hci_uart_close;
|
|
hdev->flush = hci_uart_flush;
|
|
hdev->send = hci_uart_send_frame;
|
|
hdev->setup = hci_uart_setup;
|
|
SET_HCIDEV_DEV(hdev, hu->tty->dev);
|
|
|
|
if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
|
|
set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
|
|
|
|
if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags))
|
|
set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks);
|
|
|
|
if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags))
|
|
set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
|
|
|
|
if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags))
|
|
hdev->dev_type = HCI_AMP;
|
|
else
|
|
hdev->dev_type = HCI_PRIMARY;
|
|
|
|
if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags))
|
|
return 0;
|
|
|
|
if (hci_register_dev(hdev) < 0) {
|
|
BT_ERR("Can't register HCI device");
|
|
hci_free_dev(hdev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
set_bit(HCI_UART_REGISTERED, &hu->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hci_uart_set_proto(struct hci_uart *hu, int id)
|
|
{
|
|
const 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;
|
|
set_bit(HCI_UART_PROTO_READY, &hu->flags);
|
|
|
|
err = hci_uart_register_dev(hu);
|
|
if (err) {
|
|
clear_bit(HCI_UART_PROTO_READY, &hu->flags);
|
|
p->close(hu);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags)
|
|
{
|
|
unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) |
|
|
BIT(HCI_UART_RESET_ON_INIT) |
|
|
BIT(HCI_UART_CREATE_AMP) |
|
|
BIT(HCI_UART_INIT_PENDING) |
|
|
BIT(HCI_UART_EXT_CONFIG) |
|
|
BIT(HCI_UART_VND_DETECT);
|
|
|
|
if (flags & ~valid_flags)
|
|
return -EINVAL;
|
|
|
|
hu->hdev_flags = flags;
|
|
|
|
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 = 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);
|
|
} else
|
|
err = -EBUSY;
|
|
break;
|
|
|
|
case HCIUARTGETPROTO:
|
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
|
|
err = hu->proto->id;
|
|
else
|
|
err = -EUNATCH;
|
|
break;
|
|
|
|
case HCIUARTGETDEVICE:
|
|
if (test_bit(HCI_UART_REGISTERED, &hu->flags))
|
|
err = hu->hdev->id;
|
|
else
|
|
err = -EUNATCH;
|
|
break;
|
|
|
|
case HCIUARTSETFLAGS:
|
|
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
|
|
err = -EBUSY;
|
|
else
|
|
err = hci_uart_set_flags(hu, arg);
|
|
break;
|
|
|
|
case HCIUARTGETFLAGS:
|
|
err = hu->hdev_flags;
|
|
break;
|
|
|
|
default:
|
|
err = n_tty_ioctl_helper(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;
|
|
}
|
|
|
|
static int __init hci_uart_init(void)
|
|
{
|
|
static struct tty_ldisc_ops 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_buf = hci_uart_tty_receive;
|
|
hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
|
|
hci_uart_ldisc.owner = THIS_MODULE;
|
|
|
|
err = tty_register_ldisc(N_HCI, &hci_uart_ldisc);
|
|
if (err) {
|
|
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
|
|
#ifdef CONFIG_BT_HCIUART_LL
|
|
ll_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_ATH3K
|
|
ath_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_3WIRE
|
|
h5_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_INTEL
|
|
intel_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_BCM
|
|
bcm_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_QCA
|
|
qca_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_AG6XX
|
|
ag6xx_init();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_MRVL
|
|
mrvl_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
|
|
#ifdef CONFIG_BT_HCIUART_LL
|
|
ll_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_ATH3K
|
|
ath_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_3WIRE
|
|
h5_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_INTEL
|
|
intel_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_BCM
|
|
bcm_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_QCA
|
|
qca_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_AG6XX
|
|
ag6xx_deinit();
|
|
#endif
|
|
#ifdef CONFIG_BT_HCIUART_MRVL
|
|
mrvl_deinit();
|
|
#endif
|
|
|
|
/* Release tty registration of line discipline */
|
|
err = tty_unregister_ldisc(N_HCI);
|
|
if (err)
|
|
BT_ERR("Can't unregister HCI line discipline (%d)", err);
|
|
}
|
|
|
|
module_init(hci_uart_init);
|
|
module_exit(hci_uart_exit);
|
|
|
|
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
|
|
MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION);
|
|
MODULE_VERSION(VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_LDISC(N_HCI);
|