diff options
Diffstat (limited to 'include/linux/tty_driver.h')
| -rw-r--r-- | include/linux/tty_driver.h | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 3566129384a4..c3d43eb4150c 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -45,8 +45,16 @@ * * void (*shutdown)(struct tty_struct * tty); * - * This routine is called when a particular tty device is closed for - * the last time freeing up the resources. + * This routine is called synchronously when a particular tty device + * is closed for the last time freeing up the resources. + * + * + * void (*cleanup)(struct tty_struct * tty); + * + * This routine is called asynchronously when a particular tty device + * is closed for the last time freeing up the resources. This is + * actually the second part of shutdown for routines that might sleep. + * * * int (*write)(struct tty_struct * tty, * const unsigned char *buf, int count); @@ -94,7 +102,7 @@ * unsigned int cmd, unsigned long arg); * * This routine allows the tty driver to implement - * device-specific ioctl's. If the ioctl number passed in cmd + * device-specific ioctls. If the ioctl number passed in cmd * is not recognized by the driver, it should return ENOIOCTLCMD. * * Optional @@ -159,12 +167,12 @@ * * void (*hangup)(struct tty_struct *tty); * - * This routine notifies the tty driver that it should hangup the + * This routine notifies the tty driver that it should hang up the * tty device. * * Optional: * - * int (*break_ctl)(struct tty_stuct *tty, int state); + * int (*break_ctl)(struct tty_struct *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, @@ -216,14 +224,22 @@ * unless the tty also has a valid tty->termiox pointer. * * Optional: Called under the termios lock + * + * int (*get_icount)(struct tty_struct *tty, struct serial_icounter *icount); + * + * Called when the device receives a TIOCGICOUNT ioctl. Passed a kernel + * structure to complete. This method is optional and will only be called + * if provided (otherwise EINVAL will be returned). */ #include <linux/fs.h> #include <linux/list.h> #include <linux/cdev.h> +#include <linux/termios.h> struct tty_struct; struct tty_driver; +struct serial_icounter_struct; struct tty_operations { struct tty_struct * (*lookup)(struct tty_driver *driver, @@ -233,6 +249,7 @@ struct tty_operations { int (*open)(struct tty_struct * tty, struct file * filp); void (*close)(struct tty_struct * tty, struct file * filp); void (*shutdown)(struct tty_struct *tty); + void (*cleanup)(struct tty_struct *tty); int (*write)(struct tty_struct * tty, const unsigned char *buf, int count); int (*put_char)(struct tty_struct *tty, unsigned char ch); @@ -259,6 +276,8 @@ struct tty_operations { unsigned int set, unsigned int clear); int (*resize)(struct tty_struct *tty, struct winsize *ws); int (*set_termiox)(struct tty_struct *tty, struct termiox *tnew); + int (*get_icount)(struct tty_struct *tty, + struct serial_icounter_struct *icount); #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); @@ -339,7 +358,7 @@ static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d) * overruns, either.) * * TTY_DRIVER_DYNAMIC_DEV --- if set, the individual tty devices need - * to be registered with a call to tty_register_driver() when the + * to be registered with a call to tty_register_device() when the * device is found in the system and unregistered with a call to * tty_unregister_device() so the devices will be show up * properly in sysfs. If not set, driver->num entries will be |