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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>
hifive-unleashed-5.1
Michal Simek 2010-08-17 10:42:05 +02:00 committed by Greg Kroah-Hartman
parent a958981140
commit 8a28af7f7e
1 changed files with 25 additions and 1 deletions
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26
drivers/serial/uartlite.c
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@ -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
};
/* ---------------------------------------------------------------------