diff options
Diffstat (limited to 'include/linux/tty_driver.h')
| -rw-r--r-- | include/linux/tty_driver.h | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index d2a003586761..16d27944c321 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -135,7 +135,7 @@ * * Optional: * - * void (*break_ctl)(struct tty_stuct *tty, int state); + * int (*break_ctl)(struct tty_stuct *tty, int state); * * This optional routine requests the tty driver to turn on or * off BREAK status on the RS-232 port. If state is -1, @@ -146,6 +146,10 @@ * handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK, * TIOCCBRK. * + * If the driver sets TTY_DRIVER_HARDWARE_BREAK then the interface + * will also be called with actual times and the hardware is expected + * to do the delay work itself. 0 and -1 are still used for on/off. + * * Optional: Required for TCSBRK/BRKP/etc handling. * * void (*wait_until_sent)(struct tty_struct *tty, int timeout); @@ -164,6 +168,18 @@ * * Optional: If not provided then the write method is called under * the atomic write lock to keep it serialized with the ldisc. + * + * int (*resize)(struct tty_struct *tty, struct tty_struct *real_tty, + * unsigned int rows, unsigned int cols); + * + * Called when a termios request is issued which changes the + * requested terminal geometry. + * + * Optional: the default action is to update the termios structure + * without error. This is usually the correct behaviour. Drivers should + * not force errors here if they are not resizable objects (eg a serial + * line). See tty_do_resize() if you need to wrap the standard method + * in your own logic - the usual case. */ #include <linux/fs.h> @@ -192,7 +208,7 @@ struct tty_operations { void (*stop)(struct tty_struct *tty); void (*start)(struct tty_struct *tty); void (*hangup)(struct tty_struct *tty); - void (*break_ctl)(struct tty_struct *tty, int state); + int (*break_ctl)(struct tty_struct *tty, int state); void (*flush_buffer)(struct tty_struct *tty); void (*set_ldisc)(struct tty_struct *tty); void (*wait_until_sent)(struct tty_struct *tty, int timeout); @@ -202,6 +218,8 @@ struct tty_operations { int (*tiocmget)(struct tty_struct *tty, struct file *file); int (*tiocmset)(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); + int (*resize)(struct tty_struct *tty, struct tty_struct *real_tty, + struct winsize *ws); #ifdef CONFIG_CONSOLE_POLL int (*poll_init)(struct tty_driver *driver, int line, char *options); int (*poll_get_char)(struct tty_driver *driver, int line); @@ -285,12 +303,18 @@ extern struct tty_driver *tty_find_polling_driver(char *name, int *line); * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead * use dynamic memory keyed through the devpts filesystem. This * is only applicable to the pty driver. + * + * TTY_DRIVER_HARDWARE_BREAK -- hardware handles break signals. Pass + * the requested timeout to the caller instead of using a simple + * on/off interface. + * */ #define TTY_DRIVER_INSTALLED 0x0001 #define TTY_DRIVER_RESET_TERMIOS 0x0002 #define TTY_DRIVER_REAL_RAW 0x0004 #define TTY_DRIVER_DYNAMIC_DEV 0x0008 #define TTY_DRIVER_DEVPTS_MEM 0x0010 +#define TTY_DRIVER_HARDWARE_BREAK 0x0020 /* tty driver types */ #define TTY_DRIVER_TYPE_SYSTEM 0x0001 |