diff options
Diffstat (limited to 'drivers/usb/serial/cp210x.c')
| -rw-r--r-- | drivers/usb/serial/cp210x.c | 53 |
1 files changed, 43 insertions, 10 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index 292f016..e8d5133 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -38,17 +38,21 @@ static int cp2101_open(struct tty_struct *, struct usb_serial_port *, static void cp2101_cleanup(struct usb_serial_port *); static void cp2101_close(struct tty_struct *, struct usb_serial_port *, struct file*); -static void cp2101_get_termios(struct tty_struct *); +static void cp2101_get_termios(struct tty_struct *, + struct usb_serial_port *port); +static void cp2101_get_termios_port(struct usb_serial_port *port, + unsigned int *cflagp, unsigned int *baudp); static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *, struct ktermios*); static int cp2101_tiocmget(struct tty_struct *, struct file *); static int cp2101_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int); +static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *, + unsigned int, unsigned int); static void cp2101_break_ctl(struct tty_struct *, int); static int cp2101_startup(struct usb_serial *); static void cp2101_shutdown(struct usb_serial *); - static int debug; static struct usb_device_id id_table [] = { @@ -369,10 +373,12 @@ static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port, } /* Configure the termios structure */ - cp2101_get_termios(tty); + cp2101_get_termios(tty, port); /* Set the DTR and RTS pins low */ - cp2101_tiocmset(tty, NULL, TIOCM_DTR | TIOCM_RTS, 0); + cp2101_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data + : port, + NULL, TIOCM_DTR | TIOCM_RTS, 0); return 0; } @@ -414,9 +420,31 @@ static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port, * from the device, corrects any unsupported values, and configures the * termios structure to reflect the state of the device */ -static void cp2101_get_termios (struct tty_struct *tty) +static void cp2101_get_termios(struct tty_struct *tty, + struct usb_serial_port *port) +{ + unsigned int baud; + + if (tty) { + cp2101_get_termios_port(tty->driver_data, + &tty->termios->c_cflag, &baud); + tty_encode_baud_rate(tty, baud, baud); + } + + else { + unsigned int cflag; + cflag = 0; + cp2101_get_termios_port(port, &cflag, &baud); + } +} + +/* + * cp2101_get_termios_port + * This is the heart of cp2101_get_termios which always uses a &usb_serial_port. + */ +static void cp2101_get_termios_port(struct usb_serial_port *port, + unsigned int *cflagp, unsigned int *baudp) { - struct usb_serial_port *port = tty->driver_data; unsigned int cflag, modem_ctl[4]; unsigned int baud; unsigned int bits; @@ -429,9 +457,9 @@ static void cp2101_get_termios (struct tty_struct *tty) baud = cp2101_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); dbg("%s - baud rate = %d", __func__, baud); + *baudp = baud; - tty_encode_baud_rate(tty, baud, baud); - cflag = tty->termios->c_cflag; + cflag = *cflagp; cp2101_get_config(port, CP2101_BITS, &bits, 2); cflag &= ~CSIZE; @@ -537,7 +565,7 @@ static void cp2101_get_termios (struct tty_struct *tty) cflag &= ~CRTSCTS; } - tty->termios->c_cflag = cflag; + *cflagp = cflag; } static void cp2101_set_termios(struct tty_struct *tty, @@ -669,6 +697,12 @@ static int cp2101_tiocmset (struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { struct usb_serial_port *port = tty->driver_data; + return cp2101_tiocmset_port(port, file, set, clear); +} + +static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *file, + unsigned int set, unsigned int clear) +{ unsigned int control = 0; dbg("%s - port %d", __func__, port->number); @@ -693,7 +727,6 @@ static int cp2101_tiocmset (struct tty_struct *tty, struct file *file, dbg("%s - control = 0x%.4x", __func__, control); return cp2101_set_config(port, CP2101_CONTROL, &control, 2); - } static int cp2101_tiocmget (struct tty_struct *tty, struct file *file) |
