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CRIS: Fix RS485 delay handling. 

Very recently, the RS485 interface has been fixed by adding two further
fields (see commit 1b6331848b).

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>
This commit is contained in:
Jesper Nilsson 2010-10-28 12:08:27 +02:00
parent 94479c017b
commit c7213fc4ed
1 changed files with 14 additions and 7 deletions
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21
drivers/serial/crisv10.c
View File

@ -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