Add bisync and monosync serial protocol support
to the synclink_gt driver.
Signed-off-by: Paul Fulghum <[email protected]>
--- linux-2.6.18/drivers/char/synclink_gt.c 2006-09-19 22:42:06.000000000 -0500
+++ b/drivers/char/synclink_gt.c 2006-09-20 11:57:00.000000000 -0500
@@ -461,7 +461,7 @@ static int adapter_test(struct slgt_inf
static void reset_adapter(struct slgt_info *info);
static void reset_port(struct slgt_info *info);
static void async_mode(struct slgt_info *info);
-static void hdlc_mode(struct slgt_info *info);
+static void sync_mode(struct slgt_info *info);
static void rx_stop(struct slgt_info *info);
static void rx_start(struct slgt_info *info);
@@ -881,7 +881,9 @@ static int write(struct tty_struct *tty,
if (!count)
goto cleanup;
- if (info->params.mode == MGSL_MODE_RAW) {
+ if (info->params.mode == MGSL_MODE_RAW ||
+ info->params.mode == MGSL_MODE_MONOSYNC ||
+ info->params.mode == MGSL_MODE_BISYNC) {
unsigned int bufs_needed = (count/DMABUFSIZE);
unsigned int bufs_free = free_tbuf_count(info);
if (count % DMABUFSIZE)
@@ -1897,6 +1899,8 @@ static void bh_handler(void* context)
while(rx_get_frame(info));
break;
case MGSL_MODE_RAW:
+ case MGSL_MODE_MONOSYNC:
+ case MGSL_MODE_BISYNC:
while(rx_get_buf(info));
break;
}
@@ -2362,10 +2366,9 @@ static void program_hw(struct slgt_info
rx_stop(info);
tx_stop(info);
- if (info->params.mode == MGSL_MODE_HDLC ||
- info->params.mode == MGSL_MODE_RAW ||
+ if (info->params.mode != MGSL_MODE_ASYNC ||
info->netcount)
- hdlc_mode(info);
+ sync_mode(info);
else
async_mode(info);
@@ -2564,6 +2567,10 @@ static int rx_enable(struct slgt_info *i
if (enable) {
if (!info->rx_enabled)
rx_start(info);
+ else if (enable == 2) {
+ /* force hunt mode (write 1 to RCR[3]) */
+ wr_reg16(info, RCR, rd_reg16(info, RCR) | BIT3);
+ }
} else {
if (info->rx_enabled)
rx_stop(info);
@@ -3748,7 +3755,7 @@ static void tx_start(struct slgt_info *i
{
if (!info->tx_enabled) {
wr_reg16(info, TCR,
- (unsigned short)(rd_reg16(info, TCR) | BIT1));
+ (unsigned short)((rd_reg16(info, TCR) | BIT1) & ~BIT2));
info->tx_enabled = TRUE;
}
@@ -3775,13 +3782,18 @@ static void tx_start(struct slgt_info *i
tdma_reset(info);
/* set 1st descriptor address */
wr_reg32(info, TDDAR, info->tbufs[info->tbuf_start].pdesc);
- if (info->params.mode == MGSL_MODE_RAW)
+ switch(info->params.mode) {
+ case MGSL_MODE_RAW:
+ case MGSL_MODE_MONOSYNC:
+ case MGSL_MODE_BISYNC:
wr_reg32(info, TDCSR, BIT2 + BIT0); /* IRQ + DMA enable */
- else
+ break;
+ default:
wr_reg32(info, TDCSR, BIT0); /* DMA enable */
+ }
}
- if (info->params.mode != MGSL_MODE_RAW) {
+ if (info->params.mode == MGSL_MODE_HDLC) {
info->tx_timer.expires = jiffies + msecs_to_jiffies(5000);
add_timer(&info->tx_timer);
}
@@ -3814,7 +3826,6 @@ static void tx_stop(struct slgt_info *in
/* reset and disable transmitter */
val = rd_reg16(info, TCR) & ~BIT1; /* clear enable bit */
wr_reg16(info, TCR, (unsigned short)(val | BIT2)); /* set reset bit */
- wr_reg16(info, TCR, val); /* clear reset */
slgt_irq_off(info, IRQ_TXDATA + IRQ_TXIDLE + IRQ_TXUNDER);
@@ -3982,7 +3993,7 @@ static void async_mode(struct slgt_info
enable_loopback(info);
}
-static void hdlc_mode(struct slgt_info *info)
+static void sync_mode(struct slgt_info *info)
{
unsigned short val;
@@ -3992,7 +4003,7 @@ static void hdlc_mode(struct slgt_info *
/* TCR (tx control)
*
- * 15..13 mode, 000=HDLC 001=raw sync
+ * 15..13 mode, 000=HDLC 001=raw 010=async 011=monosync 100=bisync
* 12..10 encoding
* 09 CRC enable
* 08 CRC32
@@ -4006,8 +4017,11 @@ static void hdlc_mode(struct slgt_info *
*/
val = 0;
- if (info->params.mode == MGSL_MODE_RAW)
- val |= BIT13;
+ switch(info->params.mode) {
+ case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
+ case MGSL_MODE_BISYNC: val |= BIT15; break;
+ case MGSL_MODE_RAW: val |= BIT13; break;
+ }
if (info->if_mode & MGSL_INTERFACE_RTS_EN)
val |= BIT7;
@@ -4058,7 +4072,7 @@ static void hdlc_mode(struct slgt_info *
/* RCR (rx control)
*
- * 15..13 mode, 000=HDLC 001=raw sync
+ * 15..13 mode, 000=HDLC 001=raw 010=async 011=monosync 100=bisync
* 12..10 encoding
* 09 CRC enable
* 08 CRC32
@@ -4069,8 +4083,11 @@ static void hdlc_mode(struct slgt_info *
*/
val = 0;
- if (info->params.mode == MGSL_MODE_RAW)
- val |= BIT13;
+ switch(info->params.mode) {
+ case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
+ case MGSL_MODE_BISYNC: val |= BIT15; break;
+ case MGSL_MODE_RAW: val |= BIT13; break;
+ }
switch(info->params.encoding)
{
@@ -4309,10 +4326,15 @@ static void free_rbufs(struct slgt_info
while(!done) {
/* reset current buffer for reuse */
info->rbufs[i].status = 0;
- if (info->params.mode == MGSL_MODE_RAW)
+ switch(info->params.mode) {
+ case MGSL_MODE_RAW:
+ case MGSL_MODE_MONOSYNC:
+ case MGSL_MODE_BISYNC:
set_desc_count(info->rbufs[i], info->raw_rx_size);
- else
+ break;
+ default:
set_desc_count(info->rbufs[i], DMABUFSIZE);
+ }
if (i == last)
done = 1;
@@ -4477,13 +4499,24 @@ cleanup:
static int rx_get_buf(struct slgt_info *info)
{
unsigned int i = info->rbuf_current;
+ unsigned int count;
if (!desc_complete(info->rbufs[i]))
return 0;
- DBGDATA(info, info->rbufs[i].buf, desc_count(info->rbufs[i]), "rx");
- DBGINFO(("rx_get_buf size=%d\n", desc_count(info->rbufs[i])));
- ldisc_receive_buf(info->tty, info->rbufs[i].buf,
- info->flag_buf, desc_count(info->rbufs[i]));
+ count = desc_count(info->rbufs[i]);
+ switch(info->params.mode) {
+ case MGSL_MODE_MONOSYNC:
+ case MGSL_MODE_BISYNC:
+ /* ignore residue in byte synchronous modes */
+ if (desc_residue(info->rbufs[i]))
+ count--;
+ break;
+ }
+ DBGDATA(info, info->rbufs[i].buf, count, "rx");
+ DBGINFO(("rx_get_buf size=%d\n", count));
+ if (count)
+ ldisc_receive_buf(info->tty, info->rbufs[i].buf,
+ info->flag_buf, count);
free_rbufs(info, i, i);
return 1;
}
@@ -4549,8 +4582,13 @@ static void tx_load(struct slgt_info *in
size -= count;
buf += count;
- if (!size && info->params.mode != MGSL_MODE_RAW)
- set_desc_eof(*d, 1); /* HDLC: set EOF of last desc */
+ /*
+ * set EOF bit for last buffer of HDLC frame or
+ * for every buffer in raw mode
+ */
+ if ((!size && info->params.mode == MGSL_MODE_HDLC) ||
+ info->params.mode == MGSL_MODE_RAW)
+ set_desc_eof(*d, 1);
else
set_desc_eof(*d, 0);
--- linux-2.6.18/include/linux/synclink.h 2006-09-19 22:42:06.000000000 -0500
+++ b/include/linux/synclink.h 2006-09-20 12:05:07.000000000 -0500
@@ -1,7 +1,7 @@
/*
* SyncLink Multiprotocol Serial Adapter Driver
*
- * $Id: synclink.h,v 3.13 2006/05/23 18:25:06 paulkf Exp $
+ * $Id: synclink.h,v 3.14 2006/07/17 20:15:43 paulkf Exp $
*
* Copyright (C) 1998-2000 by Microgate Corporation
*
@@ -124,6 +124,8 @@
#define MGSL_MODE_ASYNC 1
#define MGSL_MODE_HDLC 2
+#define MGSL_MODE_MONOSYNC 3
+#define MGSL_MODE_BISYNC 4
#define MGSL_MODE_RAW 6
#define MGSL_BUS_TYPE_ISA 1
-
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