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authorJ. Suter <jsuter@hardwave.de>2005-08-09 20:28:46 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-29 15:55:03 -0700
commit3a5e903c09aed19ca4a1bb26d87b8d6461a93818 (patch)
treeb9761b89aaba6537d06893091a2f43c9a8e17c3f /net/bluetooth/rfcomm/tty.c
parent7b9eb9e2099f6f4acd6a36bcd7820d27c3cf5ee3 (diff)
[Bluetooth]: Implement RFCOMM remote port negotiation
This patch implements the remote port negotiation (RPN) of the RFCOMM protocol for Bluetooth. Signed-off-by: J. Suter <jsuter@hardwave.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bluetooth/rfcomm/tty.c')
-rw-r--r--net/bluetooth/rfcomm/tty.c197
1 files changed, 160 insertions, 37 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 67d9dd6b0fa..bbc3a44a86f 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -745,20 +745,143 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, struct file *filp, unsigned
return -ENOIOCTLCMD;
}
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
static void rfcomm_tty_set_termios(struct tty_struct *tty, struct termios *old)
{
- BT_DBG("tty %p", tty);
+ struct termios *new = (struct termios *) tty->termios;
+ int old_baud_rate = tty_termios_baud_rate(old);
+ int new_baud_rate = tty_termios_baud_rate(new);
- if ((tty->termios->c_cflag == old->c_cflag) &&
- (RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old->c_iflag)))
- return;
+ u8 baud, data_bits, stop_bits, parity, x_on, x_off;
+ u16 changes = 0;
+
+ struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+ BT_DBG("tty %p termios %p", tty, old);
+
+ /* Handle turning off CRTSCTS */
+ if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS))
+ BT_DBG("Turning off CRTSCTS unsupported");
+
+ /* Parity on/off and when on, odd/even */
+ if (((old->c_cflag & PARENB) != (new->c_cflag & PARENB)) ||
+ ((old->c_cflag & PARODD) != (new->c_cflag & PARODD)) ) {
+ changes |= RFCOMM_RPN_PM_PARITY;
+ BT_DBG("Parity change detected.");
+ }
+
+ /* Mark and space parity are not supported! */
+ if (new->c_cflag & PARENB) {
+ if (new->c_cflag & PARODD) {
+ BT_DBG("Parity is ODD");
+ parity = RFCOMM_RPN_PARITY_ODD;
+ } else {
+ BT_DBG("Parity is EVEN");
+ parity = RFCOMM_RPN_PARITY_EVEN;
+ }
+ } else {
+ BT_DBG("Parity is OFF");
+ parity = RFCOMM_RPN_PARITY_NONE;
+ }
+
+ /* Setting the x_on / x_off characters */
+ if (old->c_cc[VSTOP] != new->c_cc[VSTOP]) {
+ BT_DBG("XOFF custom");
+ x_on = new->c_cc[VSTOP];
+ changes |= RFCOMM_RPN_PM_XON;
+ } else {
+ BT_DBG("XOFF default");
+ x_on = RFCOMM_RPN_XON_CHAR;
+ }
+
+ if (old->c_cc[VSTART] != new->c_cc[VSTART]) {
+ BT_DBG("XON custom");
+ x_off = new->c_cc[VSTART];
+ changes |= RFCOMM_RPN_PM_XOFF;
+ } else {
+ BT_DBG("XON default");
+ x_off = RFCOMM_RPN_XOFF_CHAR;
+ }
+
+ /* Handle setting of stop bits */
+ if ((old->c_cflag & CSTOPB) != (new->c_cflag & CSTOPB))
+ changes |= RFCOMM_RPN_PM_STOP;
+
+ /* POSIX does not support 1.5 stop bits and RFCOMM does not
+ * support 2 stop bits. So a request for 2 stop bits gets
+ * translated to 1.5 stop bits */
+ if (new->c_cflag & CSTOPB) {
+ stop_bits = RFCOMM_RPN_STOP_15;
+ } else {
+ stop_bits = RFCOMM_RPN_STOP_1;
+ }
- /* handle turning off CRTSCTS */
- if ((old->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
- BT_DBG("turning off CRTSCTS");
+ /* Handle number of data bits [5-8] */
+ if ((old->c_cflag & CSIZE) != (new->c_cflag & CSIZE))
+ changes |= RFCOMM_RPN_PM_DATA;
+
+ switch (new->c_cflag & CSIZE) {
+ case CS5:
+ data_bits = RFCOMM_RPN_DATA_5;
+ break;
+ case CS6:
+ data_bits = RFCOMM_RPN_DATA_6;
+ break;
+ case CS7:
+ data_bits = RFCOMM_RPN_DATA_7;
+ break;
+ case CS8:
+ data_bits = RFCOMM_RPN_DATA_8;
+ break;
+ default:
+ data_bits = RFCOMM_RPN_DATA_8;
+ break;
}
+
+ /* Handle baudrate settings */
+ if (old_baud_rate != new_baud_rate)
+ changes |= RFCOMM_RPN_PM_BITRATE;
+
+ switch (new_baud_rate) {
+ case 2400:
+ baud = RFCOMM_RPN_BR_2400;
+ break;
+ case 4800:
+ baud = RFCOMM_RPN_BR_4800;
+ break;
+ case 7200:
+ baud = RFCOMM_RPN_BR_7200;
+ break;
+ case 9600:
+ baud = RFCOMM_RPN_BR_9600;
+ break;
+ case 19200:
+ baud = RFCOMM_RPN_BR_19200;
+ break;
+ case 38400:
+ baud = RFCOMM_RPN_BR_38400;
+ break;
+ case 57600:
+ baud = RFCOMM_RPN_BR_57600;
+ break;
+ case 115200:
+ baud = RFCOMM_RPN_BR_115200;
+ break;
+ case 230400:
+ baud = RFCOMM_RPN_BR_230400;
+ break;
+ default:
+ /* 9600 is standard accordinag to the RFCOMM specification */
+ baud = RFCOMM_RPN_BR_9600;
+ break;
+
+ }
+
+ if (changes)
+ rfcomm_send_rpn(dev->dlc->session, 1, dev->dlc->dlci, baud,
+ data_bits, stop_bits, parity,
+ RFCOMM_RPN_FLOW_NONE, x_on, x_off, changes);
+
+ return;
}
static void rfcomm_tty_throttle(struct tty_struct *tty)
@@ -766,7 +889,7 @@ static void rfcomm_tty_throttle(struct tty_struct *tty)
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
BT_DBG("tty %p dev %p", tty, dev);
-
+
rfcomm_dlc_throttle(dev->dlc);
}
@@ -775,7 +898,7 @@ static void rfcomm_tty_unthrottle(struct tty_struct *tty)
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
BT_DBG("tty %p dev %p", tty, dev);
-
+
rfcomm_dlc_unthrottle(dev->dlc);
}
@@ -846,35 +969,35 @@ static int rfcomm_tty_tiocmget(struct tty_struct *tty, struct file *filp)
static int rfcomm_tty_tiocmset(struct tty_struct *tty, struct file *filp, unsigned int set, unsigned int clear)
{
- struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
- struct rfcomm_dlc *dlc = dev->dlc;
- u8 v24_sig;
+ struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+ struct rfcomm_dlc *dlc = dev->dlc;
+ u8 v24_sig;
BT_DBG("tty %p dev %p set 0x%02x clear 0x%02x", tty, dev, set, clear);
- rfcomm_dlc_get_modem_status(dlc, &v24_sig);
-
- if (set & TIOCM_DSR || set & TIOCM_DTR)
- v24_sig |= RFCOMM_V24_RTC;
- if (set & TIOCM_RTS || set & TIOCM_CTS)
- v24_sig |= RFCOMM_V24_RTR;
- if (set & TIOCM_RI)
- v24_sig |= RFCOMM_V24_IC;
- if (set & TIOCM_CD)
- v24_sig |= RFCOMM_V24_DV;
-
- if (clear & TIOCM_DSR || clear & TIOCM_DTR)
- v24_sig &= ~RFCOMM_V24_RTC;
- if (clear & TIOCM_RTS || clear & TIOCM_CTS)
- v24_sig &= ~RFCOMM_V24_RTR;
- if (clear & TIOCM_RI)
- v24_sig &= ~RFCOMM_V24_IC;
- if (clear & TIOCM_CD)
- v24_sig &= ~RFCOMM_V24_DV;
-
- rfcomm_dlc_set_modem_status(dlc, v24_sig);
-
- return 0;
+ rfcomm_dlc_get_modem_status(dlc, &v24_sig);
+
+ if (set & TIOCM_DSR || set & TIOCM_DTR)
+ v24_sig |= RFCOMM_V24_RTC;
+ if (set & TIOCM_RTS || set & TIOCM_CTS)
+ v24_sig |= RFCOMM_V24_RTR;
+ if (set & TIOCM_RI)
+ v24_sig |= RFCOMM_V24_IC;
+ if (set & TIOCM_CD)
+ v24_sig |= RFCOMM_V24_DV;
+
+ if (clear & TIOCM_DSR || clear & TIOCM_DTR)
+ v24_sig &= ~RFCOMM_V24_RTC;
+ if (clear & TIOCM_RTS || clear & TIOCM_CTS)
+ v24_sig &= ~RFCOMM_V24_RTR;
+ if (clear & TIOCM_RI)
+ v24_sig &= ~RFCOMM_V24_IC;
+ if (clear & TIOCM_CD)
+ v24_sig &= ~RFCOMM_V24_DV;
+
+ rfcomm_dlc_set_modem_status(dlc, v24_sig);
+
+ return 0;
}
/* ---- TTY structure ---- */