diff options
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 108 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_uart.h | 7 |
2 files changed, 109 insertions, 6 deletions
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index ac87346ce9d7..590bd8e66bfb 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -266,6 +266,85 @@ static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 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; @@ -273,13 +352,13 @@ void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) ktermios = tty->termios; ktermios.c_cflag &= ~CBAUD; - ktermios.c_cflag |= BOTHER; 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 speed: %d", hu->hdev->name, tty->termios.c_ispeed); + 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) @@ -287,15 +366,32 @@ 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->proto->init_speed) - hci_uart_set_baudrate(hu, hu->proto->init_speed); + speed = hu->proto->init_speed; + else if (hu->init_speed) + speed = hu->init_speed; + else + speed = 0; + + if (speed) + hci_uart_set_baudrate(hu, speed); + + /* Operational speed if any */ + if (hu->proto->oper_speed) + speed = hu->proto->oper_speed; + else if (hu->oper_speed) + speed = hu->oper_speed; + else + speed = 0; - if (hu->proto->set_baudrate && hu->proto->oper_speed) { - err = hu->proto->set_baudrate(hu, hu->proto->oper_speed); + if (hu->proto->set_baudrate && speed) { + err = hu->proto->set_baudrate(hu, speed); if (!err) - hci_uart_set_baudrate(hu, hu->proto->oper_speed); + hci_uart_set_baudrate(hu, speed); } if (hu->proto->setup) diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index e9f970c25304..ce9c670956f5 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -85,6 +85,9 @@ struct hci_uart { struct sk_buff *tx_skb; unsigned long tx_state; spinlock_t rx_lock; + + unsigned int init_speed; + unsigned int oper_speed; }; /* HCI_UART proto flag bits */ @@ -99,7 +102,11 @@ int hci_uart_register_proto(const struct hci_uart_proto *p); int hci_uart_unregister_proto(const struct hci_uart_proto *p); int hci_uart_tx_wakeup(struct hci_uart *hu); int hci_uart_init_ready(struct hci_uart *hu); +void hci_uart_init_tty(struct hci_uart *hu); void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed); +void hci_uart_set_flow_control(struct hci_uart *hu, bool enable); +void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, + unsigned int oper_speed); #ifdef CONFIG_BT_HCIUART_H4 int h4_init(void); |