diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/amba/serial.h | 3 | ||||
| -rw-r--r-- | include/linux/tty.h | 41 | ||||
| -rw-r--r-- | include/linux/tty_ldisc.h | 132 |
3 files changed, 106 insertions, 70 deletions
diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h index f612c783170f..62d9303c2837 100644 --- a/include/linux/amba/serial.h +++ b/include/linux/amba/serial.h @@ -203,6 +203,9 @@ struct amba_pl011_data { bool (*dma_filter)(struct dma_chan *chan, void *filter_param); void *dma_rx_param; void *dma_tx_param; + bool dma_rx_poll_enable; + unsigned int dma_rx_poll_rate; + unsigned int dma_rx_poll_timeout; void (*init) (void); void (*exit) (void); }; diff --git a/include/linux/tty.h b/include/linux/tty.h index c75d886b0307..367a9dfc4ea2 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -255,9 +255,9 @@ struct tty_struct { int count; struct winsize winsize; /* termios mutex */ unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1; - unsigned char warned:1; unsigned char ctrl_status; /* ctrl_lock */ unsigned int receive_room; /* Bytes free for queue */ + int flow_change; struct tty_struct *link; struct fasync_struct *fasync; @@ -315,9 +315,25 @@ struct tty_file_private { #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ #define TTY_HUPPED 18 /* Post driver->hangup() */ #define TTY_HUPPING 21 /* ->hangup() in progress */ +#define TTY_LDISC_HALTED 22 /* Line discipline is halted */ #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) +/* Values for tty->flow_change */ +#define TTY_THROTTLE_SAFE 1 +#define TTY_UNTHROTTLE_SAFE 2 + +static inline void __tty_set_flow_change(struct tty_struct *tty, int val) +{ + tty->flow_change = val; +} + +static inline void tty_set_flow_change(struct tty_struct *tty, int val) +{ + tty->flow_change = val; + smp_mb(); +} + #ifdef CONFIG_TTY extern void console_init(void); extern void tty_kref_put(struct tty_struct *tty); @@ -400,6 +416,8 @@ extern int tty_write_room(struct tty_struct *tty); extern void tty_driver_flush_buffer(struct tty_struct *tty); extern void tty_throttle(struct tty_struct *tty); extern void tty_unthrottle(struct tty_struct *tty); +extern int tty_throttle_safe(struct tty_struct *tty); +extern int tty_unthrottle_safe(struct tty_struct *tty); extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws); extern void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty); @@ -419,13 +437,28 @@ extern void tty_flush_to_ldisc(struct tty_struct *tty); extern void tty_buffer_free_all(struct tty_port *port); extern void tty_buffer_flush(struct tty_struct *tty); extern void tty_buffer_init(struct tty_port *port); -extern speed_t tty_get_baud_rate(struct tty_struct *tty); extern speed_t tty_termios_baud_rate(struct ktermios *termios); extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); extern void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed_t obaud); extern void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud); + +/** + * tty_get_baud_rate - get tty bit rates + * @tty: tty to query + * + * Returns the baud rate as an integer for this terminal. The + * termios lock must be held by the caller and the terminal bit + * flags may be updated. + * + * Locking: none + */ +static inline speed_t tty_get_baud_rate(struct tty_struct *tty) +{ + return tty_termios_baud_rate(&tty->termios); +} + extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b); extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt); @@ -502,6 +535,8 @@ extern int tty_port_carrier_raised(struct tty_port *port); extern void tty_port_raise_dtr_rts(struct tty_port *port); extern void tty_port_lower_dtr_rts(struct tty_port *port); extern void tty_port_hangup(struct tty_port *port); +extern void tty_port_tty_hangup(struct tty_port *port, bool check_clocal); +extern void tty_port_tty_wakeup(struct tty_port *port); extern int tty_port_block_til_ready(struct tty_port *port, struct tty_struct *tty, struct file *filp); extern int tty_port_close_start(struct tty_port *port, @@ -526,8 +561,6 @@ extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); extern void tty_ldisc_init(struct tty_struct *tty); extern void tty_ldisc_deinit(struct tty_struct *tty); extern void tty_ldisc_begin(void); -/* This last one is just for the tty layer internals and shouldn't be used elsewhere */ -extern void tty_ldisc_enable(struct tty_struct *tty); /* n_tty.c */ diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index 455a0d7bf220..58390c73df8b 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -9,89 +9,89 @@ * * int (*open)(struct tty_struct *); * - * This function is called when the line discipline is associated - * with the tty. The line discipline can use this as an - * opportunity to initialize any state needed by the ldisc routines. - * + * This function is called when the line discipline is associated + * with the tty. The line discipline can use this as an + * opportunity to initialize any state needed by the ldisc routines. + * * void (*close)(struct tty_struct *); * * This function is called when the line discipline is being - * shutdown, either because the tty is being closed or because - * the tty is being changed to use a new line discipline - * + * shutdown, either because the tty is being closed or because + * the tty is being changed to use a new line discipline + * * void (*flush_buffer)(struct tty_struct *tty); * - * This function instructs the line discipline to clear its - * buffers of any input characters it may have queued to be - * delivered to the user mode process. - * + * This function instructs the line discipline to clear its + * buffers of any input characters it may have queued to be + * delivered to the user mode process. + * * ssize_t (*chars_in_buffer)(struct tty_struct *tty); * - * This function returns the number of input characters the line + * This function returns the number of input characters the line * discipline may have queued up to be delivered to the user mode * process. - * + * * ssize_t (*read)(struct tty_struct * tty, struct file * file, * unsigned char * buf, size_t nr); * - * This function is called when the user requests to read from - * the tty. The line discipline will return whatever characters - * it has buffered up for the user. If this function is not - * defined, the user will receive an EIO error. - * + * This function is called when the user requests to read from + * the tty. The line discipline will return whatever characters + * it has buffered up for the user. If this function is not + * defined, the user will receive an EIO error. + * * ssize_t (*write)(struct tty_struct * tty, struct file * file, - * const unsigned char * buf, size_t nr); - * - * This function is called when the user requests to write to the - * tty. The line discipline will deliver the characters to the - * low-level tty device for transmission, optionally performing - * some processing on the characters first. If this function is - * not defined, the user will receive an EIO error. - * + * const unsigned char * buf, size_t nr); + * + * This function is called when the user requests to write to the + * tty. The line discipline will deliver the characters to the + * low-level tty device for transmission, optionally performing + * some processing on the characters first. If this function is + * not defined, the user will receive an EIO error. + * * int (*ioctl)(struct tty_struct * tty, struct file * file, - * unsigned int cmd, unsigned long arg); + * unsigned int cmd, unsigned long arg); * * This function is called when the user requests an ioctl which - * is not handled by the tty layer or the low-level tty driver. - * It is intended for ioctls which affect line discpline - * operation. Note that the search order for ioctls is (1) tty - * layer, (2) tty low-level driver, (3) line discpline. So a - * low-level driver can "grab" an ioctl request before the line - * discpline has a chance to see it. - * + * is not handled by the tty layer or the low-level tty driver. + * It is intended for ioctls which affect line discpline + * operation. Note that the search order for ioctls is (1) tty + * layer, (2) tty low-level driver, (3) line discpline. So a + * low-level driver can "grab" an ioctl request before the line + * discpline has a chance to see it. + * * long (*compat_ioctl)(struct tty_struct * tty, struct file * file, - * unsigned int cmd, unsigned long arg); + * unsigned int cmd, unsigned long arg); * - * Process ioctl calls from 32-bit process on 64-bit system + * Process ioctl calls from 32-bit process on 64-bit system * * void (*set_termios)(struct tty_struct *tty, struct ktermios * old); * - * This function notifies the line discpline that a change has - * been made to the termios structure. - * + * This function notifies the line discpline that a change has + * been made to the termios structure. + * * int (*poll)(struct tty_struct * tty, struct file * file, - * poll_table *wait); + * poll_table *wait); * - * This function is called when a user attempts to select/poll on a - * tty device. It is solely the responsibility of the line - * discipline to handle poll requests. + * This function is called when a user attempts to select/poll on a + * tty device. It is solely the responsibility of the line + * discipline to handle poll requests. * * void (*receive_buf)(struct tty_struct *, const unsigned char *cp, - * char *fp, int count); - * - * This function is called by the low-level tty driver to send - * characters received by the hardware to the line discpline for - * processing. <cp> is a pointer to the buffer of input - * character received by the device. <fp> is a pointer to a - * pointer of flag bytes which indicate whether a character was - * received with a parity error, etc. - * + * char *fp, int count); + * + * This function is called by the low-level tty driver to send + * characters received by the hardware to the line discpline for + * processing. <cp> is a pointer to the buffer of input + * character received by the device. <fp> is a pointer to a + * pointer of flag bytes which indicate whether a character was + * received with a parity error, etc. + * * void (*write_wakeup)(struct tty_struct *); * - * This function is called by the low-level tty driver to signal - * that line discpline should try to send more characters to the - * low-level driver for transmission. If the line discpline does - * not have any more data to send, it can just return. + * This function is called by the low-level tty driver to signal + * that line discpline should try to send more characters to the + * low-level driver for transmission. If the line discpline does + * not have any more data to send, it can just return. * * int (*hangup)(struct tty_struct *) * @@ -115,7 +115,7 @@ struct tty_ldisc_ops { char *name; int num; int flags; - + /* * The following routines are called from above. */ @@ -123,19 +123,19 @@ struct tty_ldisc_ops { void (*close)(struct tty_struct *); void (*flush_buffer)(struct tty_struct *tty); ssize_t (*chars_in_buffer)(struct tty_struct *tty); - ssize_t (*read)(struct tty_struct * tty, struct file * file, - unsigned char __user * buf, size_t nr); - ssize_t (*write)(struct tty_struct * tty, struct file * file, - const unsigned char * buf, size_t nr); - int (*ioctl)(struct tty_struct * tty, struct file * file, + ssize_t (*read)(struct tty_struct *tty, struct file *file, + unsigned char __user *buf, size_t nr); + ssize_t (*write)(struct tty_struct *tty, struct file *file, + const unsigned char *buf, size_t nr); + int (*ioctl)(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); - long (*compat_ioctl)(struct tty_struct * tty, struct file * file, + long (*compat_ioctl)(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); - void (*set_termios)(struct tty_struct *tty, struct ktermios * old); + void (*set_termios)(struct tty_struct *tty, struct ktermios *old); unsigned int (*poll)(struct tty_struct *, struct file *, struct poll_table_struct *); int (*hangup)(struct tty_struct *tty); - + /* * The following routines are called from below. */ @@ -145,7 +145,7 @@ struct tty_ldisc_ops { void (*dcd_change)(struct tty_struct *, unsigned int); struct module *owner; - + int refcount; }; |