>From e768d25cfa8e1f4a1eebb8fb69930c2ef64da2cb Mon Sep 17 00:00:00 2001 From: Chris J Arges Date: Tue, 4 Nov 2008 15:10:37 -0600 Subject: [PATCH] pmac_zilog console polling support Implemented poll_get_char and poll_put_char for console polling which then enables kgdb to work on machines (for example the Apple PowerMac G5) that use the pmac_zilog serial driver. --- drivers/serial/pmac_zilog.c | 27 +++++++++++++++++++++++++++ 1 files changed, 27 insertions(+), 0 deletions(-) diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c index 317b061..ad34885 100644 --- a/drivers/serial/pmac_zilog.c +++ b/drivers/serial/pmac_zilog.c @@ -1383,6 +1383,29 @@ static int pmz_verify_port(struct uart_port *port, struct serial_struct *ser) return -EINVAL; } +#ifdef CONFIG_CONSOLE_POLL + +static int pmz_poll_get_char(struct uart_port *port) +{ + struct uart_pmac_port *uap = (struct uart_pmac_port *)port; + + while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) + udelay(5); + return read_zsdata(uap); +} + +static void pmz_poll_put_char(struct uart_port *port, unsigned char c) +{ + struct uart_pmac_port *uap = (struct uart_pmac_port *)port; + + /* Wait for the transmit buffer to empty. */ + while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0) + udelay(5); + write_zsdata(uap, c); +} + +#endif + static struct uart_ops pmz_pops = { .tx_empty = pmz_tx_empty, .set_mctrl = pmz_set_mctrl, @@ -1400,6 +1423,10 @@ static struct uart_ops pmz_pops = { .request_port = pmz_request_port, .config_port = pmz_config_port, .verify_port = pmz_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = pmz_poll_get_char, + .poll_put_char = pmz_poll_put_char, +#endif }; /* -- 1.5.4.5 Signed-off-by: Chris J Arges