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| author | Cosmin Cojocar <cosmin.cojocar@gmail.com> | 2010-12-05 16:15:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-12-11 00:17:19 +0100 |
| commit | 1b41dbc1296269797efbb2b0837732b74de4731d (patch) | |
| tree | 96281f7869f5b98f7cd9082d52d781ed86b85ebb /drivers/serial/omap-serial.c | |
| parent | serial: fix pch_uart kconfig & build (diff) | |
| download | linux-1b41dbc1296269797efbb2b0837732b74de4731d.tar.xz linux-1b41dbc1296269797efbb2b0837732b74de4731d.zip | |
serial: omap-serial: Add support for kernel debugger
The kgdb invokes the poll_put_char and poll_get_char when communicating
with the host. This patch also changes the initialization order because the
kgdb will check at the very beginning, if there is a valid serial
driver.
Signed-off-by: Cosmin Cojocar <cosmin.cojocar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to '')
| -rw-r--r-- | drivers/serial/omap-serial.c | 38 |
1 files changed, 32 insertions, 6 deletions
diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c index 14365f72b664..54239f5a9948 100644 --- a/drivers/serial/omap-serial.c +++ b/drivers/serial/omap-serial.c @@ -866,12 +866,6 @@ serial_omap_type(struct uart_port *port) return up->name; } -#ifdef CONFIG_SERIAL_OMAP_CONSOLE - -static struct uart_omap_port *serial_omap_console_ports[4]; - -static struct uart_driver serial_omap_reg; - #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) static inline void wait_for_xmitr(struct uart_omap_port *up) @@ -905,6 +899,34 @@ static inline void wait_for_xmitr(struct uart_omap_port *up) } } +#ifdef CONFIG_CONSOLE_POLL + +static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) +{ + struct uart_omap_port *up = (struct uart_omap_port *)port; + wait_for_xmitr(up); + serial_out(up, UART_TX, ch); +} + +static int serial_omap_poll_get_char(struct uart_port *port) +{ + struct uart_omap_port *up = (struct uart_omap_port *)port; + unsigned int status = serial_in(up, UART_LSR); + + if (!(status & UART_LSR_DR)) + return NO_POLL_CHAR; + + return serial_in(up, UART_RX); +} + +#endif /* CONFIG_CONSOLE_POLL */ + +#ifdef CONFIG_SERIAL_OMAP_CONSOLE + +static struct uart_omap_port *serial_omap_console_ports[4]; + +static struct uart_driver serial_omap_reg; + static void serial_omap_console_putchar(struct uart_port *port, int ch) { struct uart_omap_port *up = (struct uart_omap_port *)port; @@ -1022,6 +1044,10 @@ static struct uart_ops serial_omap_pops = { .request_port = serial_omap_request_port, .config_port = serial_omap_config_port, .verify_port = serial_omap_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_put_char = serial_omap_poll_put_char, + .poll_get_char = serial_omap_poll_get_char, +#endif }; static struct uart_driver serial_omap_reg = { |