[PATCH] serial: Add CONSOLE_POLL support for uartlite
in [Kernel]
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From: Michal Simek on 9 Aug 2010 06:10 CONSOLE_POLL support for uartlite enables KGDB debugging over serial line. Signed-off-by: Michal Simek <monstr(a)monstr.eu> --- 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 caf085d..ce1f3e0 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) +{ + while (!(ioread32be(port->membase + ULITE_STATUS) + & ULITE_STATUS_RXVALID)) + cpu_relax(); + + 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 }; /* --------------------------------------------------------------------- -- 1.5.5.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |