The patch titled
kgdb: kgdboc console poll hooks for serial_txx9 uart
has been added to the -mm tree. Its filename is
kgdb-kgdboc-console-poll-hooks-for-serial_txx9-uart.patch
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------------------------------------------------------
Subject: kgdb: kgdboc console poll hooks for serial_txx9 uart
From: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
Implement the serial polling hooks for the serial_txx9 uart for use with
kgdboc.
This patch once got SOB from Jason on Jul 2008 and (perhaps) merged
into kgdb-next branch, but lost somewhere then.
I resend it now with Jason's Acked-by.
Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
Acked-by: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/serial/serial_txx9.c | 113 ++++++++++++++++++++++++++-------
1 file changed, 92 insertions(+), 21 deletions(-)
diff -puN drivers/serial/serial_txx9.c~kgdb-kgdboc-console-poll-hooks-for-serial_txx9-uart drivers/serial/serial_txx9.c
--- a/drivers/serial/serial_txx9.c~kgdb-kgdboc-console-poll-hooks-for-serial_txx9-uart
+++ a/drivers/serial/serial_txx9.c
@@ -461,6 +461,94 @@ static void serial_txx9_break_ctl(struct
spin_unlock_irqrestore(&up->port.lock, flags);
}
+#if defined(CONFIG_SERIAL_TXX9_CONSOLE) || (CONFIG_CONSOLE_POLL)
+/*
+ * Wait for transmitter & holding register to empty
+ */
+static void wait_for_xmitr(struct uart_txx9_port *up)
+{
+ unsigned int tmout = 10000;
+
+ /* Wait up to 10ms for the character(s) to be sent. */
+ while (--tmout &&
+ !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
+ udelay(1);
+
+ /* Wait up to 1s for flow control if necessary */
+ if (up->port.flags & UPF_CONS_FLOW) {
+ tmout = 1000000;
+ while (--tmout &&
+ (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
+ udelay(1);
+ }
+}
+#endif
+
+#ifdef CONFIG_CONSOLE_POLL
+/*
+ * Console polling routines for writing and reading from the uart while
+ * in an interrupt or debug context.
+ */
+
+static int serial_txx9_get_poll_char(struct uart_port *port)
+{
+ unsigned int ier;
+ unsigned char c;
+ struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = sio_in(up, TXX9_SIDICR);
+ sio_out(up, TXX9_SIDICR, 0);
+
+ while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
+ ;
+
+ c = sio_in(up, TXX9_SIRFIFO);
+
+ /*
+ * Finally, clear RX interrupt status
+ * and restore the IER
+ */
+ sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
+ sio_out(up, TXX9_SIDICR, ier);
+ return c;
+}
+
+
+static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
+{
+ unsigned int ier;
+ struct uart_txx9_port *up = (struct uart_txx9_port *)port;
+
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = sio_in(up, TXX9_SIDICR);
+ sio_out(up, TXX9_SIDICR, 0);
+
+ wait_for_xmitr(up);
+ /*
+ * Send the character out.
+ * If a LF, also do CR...
+ */
+ sio_out(up, TXX9_SITFIFO, c);
+ if (c == 10) {
+ wait_for_xmitr(up);
+ sio_out(up, TXX9_SITFIFO, 13);
+ }
+
+ /*
+ * Finally, wait for transmitter to become empty
+ * and restore the IER
+ */
+ wait_for_xmitr(up);
+ sio_out(up, TXX9_SIDICR, ier);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
static int serial_txx9_startup(struct uart_port *port)
{
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
@@ -781,6 +869,10 @@ static struct uart_ops serial_txx9_pops
.release_port = serial_txx9_release_port,
.request_port = serial_txx9_request_port,
.config_port = serial_txx9_config_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = serial_txx9_get_poll_char,
+ .poll_put_char = serial_txx9_put_poll_char,
+#endif
};
static struct uart_txx9_port serial_txx9_ports[UART_NR];
@@ -803,27 +895,6 @@ static void __init serial_txx9_register_
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
-/*
- * Wait for transmitter & holding register to empty
- */
-static inline void wait_for_xmitr(struct uart_txx9_port *up)
-{
- unsigned int tmout = 10000;
-
- /* Wait up to 10ms for the character(s) to be sent. */
- while (--tmout &&
- !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
- udelay(1);
-
- /* Wait up to 1s for flow control if necessary */
- if (up->port.flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout &&
- (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
- udelay(1);
- }
-}
-
static void serial_txx9_console_putchar(struct uart_port *port, int ch)
{
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
_
Patches currently in -mm which might be from anemo@xxxxxxxxxxxxx are
origin.patch
linux-next.patch
mtd-txx9-add-ndfmc-support.patch
mtd-rbtx4939-add-mtd-support.patch
mtd-txx9-soc-nand-flash-memory-controller-driver.patch
mtd-rbtx4939-map-driver-v2.patch
kgdb-kgdboc-console-poll-hooks-for-serial_txx9-uart.patch
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