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| author | Michal Simek <monstr@monstr.eu> | 2010-08-17 10:42:05 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 19:19:58 +0200 |
| commit | 8a28af7f7e42cd0f107e0d84e4ece89e7ef24d3f (patch) | |
| tree | cb327d95ce6ed0ef7c511c69e190d7026c8245b6 /drivers/serial/uartlite.c | |
| parent | serial: mfd: snprintf() returns largish values (diff) | |
| download | linux-8a28af7f7e42cd0f107e0d84e4ece89e7ef24d3f.tar.xz linux-8a28af7f7e42cd0f107e0d84e4ece89e7ef24d3f.zip | |
serial: Add CONSOLE_POLL support for uartlite
CONSOLE_POLL support for uartlite enables
KGDB debugging over serial line.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/uartlite.c')
| -rw-r--r-- | drivers/serial/uartlite.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c index 9b03d7b3e456..c4bf54bb3fc7 100644 --- a/drivers/serial/uartlite.c +++ b/drivers/serial/uartlite.c @@ -322,6 +322,26 @@ static int ulite_verify_port(struct uart_port *port, struct serial_struct *ser) return -EINVAL; } +#ifdef CONFIG_CONSOLE_POLL +static int ulite_get_poll_char(struct uart_port *port) +{ + if (!(ioread32be(port->membase + ULITE_STATUS) + & ULITE_STATUS_RXVALID)) + return NO_POLL_CHAR; + + return ioread32be(port->membase + ULITE_RX); +} + +static void ulite_put_poll_char(struct uart_port *port, unsigned char ch) +{ + while (ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_TXFULL) + cpu_relax(); + + /* write char to device */ + iowrite32be(ch, port->membase + ULITE_TX); +} +#endif + static struct uart_ops ulite_ops = { .tx_empty = ulite_tx_empty, .set_mctrl = ulite_set_mctrl, @@ -338,7 +358,11 @@ static struct uart_ops ulite_ops = { .release_port = ulite_release_port, .request_port = ulite_request_port, .config_port = ulite_config_port, - .verify_port = ulite_verify_port + .verify_port = ulite_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = ulite_get_poll_char, + .poll_put_char = ulite_put_poll_char, +#endif }; /* --------------------------------------------------------------------- |