diff options
| author | Jesper Nilsson <jespern@axis.com> | 2010-10-28 12:08:27 +0200 |
|---|---|---|
| committer | Jesper Nilsson <jespern@axis.com> | 2010-10-28 12:13:27 +0200 |
| commit | c7213fc4ed592070f1010da39b0bf0eb2395b619 (patch) | |
| tree | ca3124a48ecd7d29077e8e5de1d70375cea2ff0a /drivers/serial | |
| parent | 94479c017b58f69e2304d88c2826ba445cd4cd99 (diff) | |
| download | linux-c7213fc4ed592070f1010da39b0bf0eb2395b619.tar.bz2 | |
CRIS: Fix RS485 delay handling.
Very recently, the RS485 interface has been fixed by adding two further
fields (see commit 1b6331848b69d1ed165a6bdc75c4046d68767563).
Check the value of the flag SER_RS485_RTS_BEFORE_SEND before delaying.
Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/crisv10.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c index 20402c604c10..fa62578fcd20 100644 --- a/drivers/serial/crisv10.c +++ b/drivers/serial/crisv10.c @@ -1411,11 +1411,12 @@ e100_enable_rs485(struct tty_struct *tty, struct serial_rs485 *r) CONFIG_ETRAX_RS485_LTC1387_RXEN_PORT_G_BIT, 1); #endif - info->rs485.flags = r->flags; - if (r->delay_rts_before_send >= 1000) + info->rs485 = *r; + + /* Maximum delay before RTS equal to 1000 */ + if (info->rs485.delay_rts_before_send >= 1000) info->rs485.delay_rts_before_send = 1000; - else - info->rs485.delay_rts_before_send = r->delay_rts_before_send; + /* printk("rts: on send = %i, after = %i, enabled = %i", info->rs485.rts_on_send, info->rs485.rts_after_sent, @@ -3234,9 +3235,9 @@ rs_write(struct tty_struct *tty, e100_disable_rx(info); e100_enable_rx_irq(info); #endif - - if (info->rs485.delay_rts_before_send > 0) - msleep(info->rs485.delay_rts_before_send); + if ((info->rs485.flags & SER_RS485_RTS_BEFORE_SEND) && + (info->rs485.delay_rts_before_send > 0)) + msleep(info->rs485.delay_rts_before_send); } #endif /* CONFIG_ETRAX_RS485 */ @@ -3694,6 +3695,11 @@ rs_ioctl(struct tty_struct *tty, struct file * file, rs485data.delay_rts_before_send = rs485ctrl.delay_rts_before_send; rs485data.flags = 0; + if (rs485data.delay_rts_before_send != 0) + rs485data.flags |= SER_RS485_RTS_BEFORE_SEND; + else + rs485data.flags &= ~(SER_RS485_RTS_BEFORE_SEND); + if (rs485ctrl.enabled) rs485data.flags |= SER_RS485_ENABLED; else @@ -4527,6 +4533,7 @@ static int __init rs_init(void) /* Set sane defaults */ info->rs485.flags &= ~(SER_RS485_RTS_ON_SEND); info->rs485.flags |= SER_RS485_RTS_AFTER_SEND; + info->rs485.flags &= ~(SER_RS485_RTS_BEFORE_SEND); info->rs485.delay_rts_before_send = 0; info->rs485.flags &= ~(SER_RS485_ENABLED); #endif |