diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/hvc/hvc_console.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 59000750cc7..e1aaf4f309b 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -39,6 +39,7 @@ #include <linux/delay.h> #include <linux/freezer.h> #include <linux/slab.h> +#include <linux/serial_core.h> #include <asm/uaccess.h> @@ -766,6 +767,39 @@ static int hvc_tiocmset(struct tty_struct *tty, return hp->ops->tiocmset(hp, set, clear); } +#ifdef CONFIG_CONSOLE_POLL +int hvc_poll_init(struct tty_driver *driver, int line, char *options) +{ + return 0; +} + +static int hvc_poll_get_char(struct tty_driver *driver, int line) +{ + struct tty_struct *tty = driver->ttys[0]; + struct hvc_struct *hp = tty->driver_data; + int n; + char ch; + + n = hp->ops->get_chars(hp->vtermno, &ch, 1); + + if (n == 0) + return NO_POLL_CHAR; + + return ch; +} + +static void hvc_poll_put_char(struct tty_driver *driver, int line, char ch) +{ + struct tty_struct *tty = driver->ttys[0]; + struct hvc_struct *hp = tty->driver_data; + int n; + + do { + n = hp->ops->put_chars(hp->vtermno, &ch, 1); + } while (n <= 0); +} +#endif + static const struct tty_operations hvc_ops = { .open = hvc_open, .close = hvc_close, @@ -776,6 +810,11 @@ static const struct tty_operations hvc_ops = { .chars_in_buffer = hvc_chars_in_buffer, .tiocmget = hvc_tiocmget, .tiocmset = hvc_tiocmset, +#ifdef CONFIG_CONSOLE_POLL + .poll_init = hvc_poll_init, + .poll_get_char = hvc_poll_get_char, + .poll_put_char = hvc_poll_put_char, +#endif }; struct hvc_struct *hvc_alloc(uint32_t vtermno, int data, |