From ef04d121f030329aae0c2d3ec22beea0c5cbcfd3 Mon Sep 17 00:00:00 2001 From: Pavan Savoy Date: Fri, 4 Feb 2011 02:23:13 -0600 Subject: drivers:misc: ti-st: firmware download optimization To fasten the process of firmware download, the chip allows disabling of the command complete event generation from host. In these cases, only few very essential commands would have the command complete events and hence the wait associated with them. So now the driver would wait for a command complete event, only when it comes across a wait event during firmware parsing. This would also mean we need to skip not just the change baud rate command but also the wait for it. Signed-off-by: Pavan Savoy Signed-off-by: Greg Kroah-Hartman --- drivers/misc/ti-st/st_core.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/misc/ti-st/st_core.c') diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c index f7bb96f3a424..dd2c879faff6 100644 --- a/drivers/misc/ti-st/st_core.c +++ b/drivers/misc/ti-st/st_core.c @@ -52,6 +52,24 @@ static void remove_channel_from_table(struct st_data_s *st_gdata, st_gdata->list[proto->chnl_id] = NULL; } +/* + * called from KIM during firmware download. + * + * This is a wrapper function to tty->ops->write_room. + * It returns number of free space available in + * uart tx buffer. + */ +int st_get_uart_wr_room(struct st_data_s *st_gdata) +{ + struct tty_struct *tty; + if (unlikely(st_gdata == NULL || st_gdata->tty == NULL)) { + pr_err("tty unavailable to perform write"); + return -1; + } + tty = st_gdata->tty; + return tty->ops->write_room(tty); +} + /* can be called in from * -- KIM (during fw download) * -- ST Core (during st_write) -- cgit v1.2.1