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authorMichal Simek <monstr@monstr.eu>2010-08-17 10:42:05 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-22 10:19:58 -0700
commit8a28af7f7e42cd0f107e0d84e4ece89e7ef24d3f (patch)
treecb327d95ce6ed0ef7c511c69e190d7026c8245b6 /drivers/serial
parenta95898114059e1038f3f7ee9bd2e43aefa62709a (diff)
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')
-rw-r--r--drivers/serial/uartlite.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
index 9b03d7b3e45..c4bf54bb3fc 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
};
/* ---------------------------------------------------------------------