mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
a947c8f031
The negation makes it a bool before the comparison and hence it will never be 0x40. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Karsten Keil <isdn@linux-pingi.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
293 lines
7.1 KiB
C
293 lines
7.1 KiB
C
/* $Id: hscx_irq.c,v 1.18.2.3 2004/02/11 13:21:34 keil Exp $
|
|
*
|
|
* low level b-channel stuff for Siemens HSCX
|
|
*
|
|
* Author Karsten Keil
|
|
* Copyright by Karsten Keil <keil@isdn4linux.de>
|
|
*
|
|
* This software may be used and distributed according to the terms
|
|
* of the GNU General Public License, incorporated herein by reference.
|
|
*
|
|
* This is an include file for fast inline IRQ stuff
|
|
*
|
|
*/
|
|
|
|
|
|
static inline void
|
|
waitforCEC(struct IsdnCardState *cs, int hscx)
|
|
{
|
|
int to = 50;
|
|
|
|
while ((READHSCX(cs, hscx, HSCX_STAR) & 0x04) && to) {
|
|
udelay(1);
|
|
to--;
|
|
}
|
|
if (!to)
|
|
printk(KERN_WARNING "HiSax: waitforCEC timeout\n");
|
|
}
|
|
|
|
|
|
static inline void
|
|
waitforXFW(struct IsdnCardState *cs, int hscx)
|
|
{
|
|
int to = 50;
|
|
|
|
while (((READHSCX(cs, hscx, HSCX_STAR) & 0x44) != 0x40) && to) {
|
|
udelay(1);
|
|
to--;
|
|
}
|
|
if (!to)
|
|
printk(KERN_WARNING "HiSax: waitforXFW timeout\n");
|
|
}
|
|
|
|
static inline void
|
|
WriteHSCXCMDR(struct IsdnCardState *cs, int hscx, u_char data)
|
|
{
|
|
waitforCEC(cs, hscx);
|
|
WRITEHSCX(cs, hscx, HSCX_CMDR, data);
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
hscx_empty_fifo(struct BCState *bcs, int count)
|
|
{
|
|
u_char *ptr;
|
|
struct IsdnCardState *cs = bcs->cs;
|
|
|
|
if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
|
|
debugl1(cs, "hscx_empty_fifo");
|
|
|
|
if (bcs->hw.hscx.rcvidx + count > HSCX_BUFMAX) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "hscx_empty_fifo: incoming packet too large");
|
|
WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x80);
|
|
bcs->hw.hscx.rcvidx = 0;
|
|
return;
|
|
}
|
|
ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx;
|
|
bcs->hw.hscx.rcvidx += count;
|
|
READHSCXFIFO(cs, bcs->hw.hscx.hscx, ptr, count);
|
|
WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x80);
|
|
if (cs->debug & L1_DEB_HSCX_FIFO) {
|
|
char *t = bcs->blog;
|
|
|
|
t += sprintf(t, "hscx_empty_fifo %c cnt %d",
|
|
bcs->hw.hscx.hscx ? 'B' : 'A', count);
|
|
QuickHex(t, ptr, count);
|
|
debugl1(cs, bcs->blog);
|
|
}
|
|
}
|
|
|
|
static void
|
|
hscx_fill_fifo(struct BCState *bcs)
|
|
{
|
|
struct IsdnCardState *cs = bcs->cs;
|
|
int more, count;
|
|
int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags)? 64: 32;
|
|
u_char *ptr;
|
|
|
|
if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
|
|
debugl1(cs, "hscx_fill_fifo");
|
|
|
|
if (!bcs->tx_skb)
|
|
return;
|
|
if (bcs->tx_skb->len <= 0)
|
|
return;
|
|
|
|
more = (bcs->mode == L1_MODE_TRANS) ? 1 : 0;
|
|
if (bcs->tx_skb->len > fifo_size) {
|
|
more = !0;
|
|
count = fifo_size;
|
|
} else
|
|
count = bcs->tx_skb->len;
|
|
|
|
waitforXFW(cs, bcs->hw.hscx.hscx);
|
|
ptr = bcs->tx_skb->data;
|
|
skb_pull(bcs->tx_skb, count);
|
|
bcs->tx_cnt -= count;
|
|
bcs->hw.hscx.count += count;
|
|
WRITEHSCXFIFO(cs, bcs->hw.hscx.hscx, ptr, count);
|
|
WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, more ? 0x8 : 0xa);
|
|
if (cs->debug & L1_DEB_HSCX_FIFO) {
|
|
char *t = bcs->blog;
|
|
|
|
t += sprintf(t, "hscx_fill_fifo %c cnt %d",
|
|
bcs->hw.hscx.hscx ? 'B' : 'A', count);
|
|
QuickHex(t, ptr, count);
|
|
debugl1(cs, bcs->blog);
|
|
}
|
|
}
|
|
|
|
static void
|
|
hscx_interrupt(struct IsdnCardState *cs, u_char val, u_char hscx)
|
|
{
|
|
u_char r;
|
|
struct BCState *bcs = cs->bcs + hscx;
|
|
struct sk_buff *skb;
|
|
int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags)? 64: 32;
|
|
int count;
|
|
|
|
if (!test_bit(BC_FLG_INIT, &bcs->Flag))
|
|
return;
|
|
|
|
if (val & 0x80) { /* RME */
|
|
r = READHSCX(cs, hscx, HSCX_RSTA);
|
|
if ((r & 0xf0) != 0xa0) {
|
|
if (!(r & 0x80)) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "HSCX invalid frame");
|
|
#ifdef ERROR_STATISTIC
|
|
bcs->err_inv++;
|
|
#endif
|
|
}
|
|
if ((r & 0x40) && bcs->mode) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "HSCX RDO mode=%d",
|
|
bcs->mode);
|
|
#ifdef ERROR_STATISTIC
|
|
bcs->err_rdo++;
|
|
#endif
|
|
}
|
|
if (!(r & 0x20)) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "HSCX CRC error");
|
|
#ifdef ERROR_STATISTIC
|
|
bcs->err_crc++;
|
|
#endif
|
|
}
|
|
WriteHSCXCMDR(cs, hscx, 0x80);
|
|
} else {
|
|
count = READHSCX(cs, hscx, HSCX_RBCL) & (
|
|
test_bit(HW_IPAC, &cs->HW_Flags)? 0x3f: 0x1f);
|
|
if (count == 0)
|
|
count = fifo_size;
|
|
hscx_empty_fifo(bcs, count);
|
|
if ((count = bcs->hw.hscx.rcvidx - 1) > 0) {
|
|
if (cs->debug & L1_DEB_HSCX_FIFO)
|
|
debugl1(cs, "HX Frame %d", count);
|
|
if (!(skb = dev_alloc_skb(count)))
|
|
printk(KERN_WARNING "HSCX: receive out of memory\n");
|
|
else {
|
|
memcpy(skb_put(skb, count), bcs->hw.hscx.rcvbuf, count);
|
|
skb_queue_tail(&bcs->rqueue, skb);
|
|
}
|
|
}
|
|
}
|
|
bcs->hw.hscx.rcvidx = 0;
|
|
schedule_event(bcs, B_RCVBUFREADY);
|
|
}
|
|
if (val & 0x40) { /* RPF */
|
|
hscx_empty_fifo(bcs, fifo_size);
|
|
if (bcs->mode == L1_MODE_TRANS) {
|
|
/* receive audio data */
|
|
if (!(skb = dev_alloc_skb(fifo_size)))
|
|
printk(KERN_WARNING "HiSax: receive out of memory\n");
|
|
else {
|
|
memcpy(skb_put(skb, fifo_size), bcs->hw.hscx.rcvbuf, fifo_size);
|
|
skb_queue_tail(&bcs->rqueue, skb);
|
|
}
|
|
bcs->hw.hscx.rcvidx = 0;
|
|
schedule_event(bcs, B_RCVBUFREADY);
|
|
}
|
|
}
|
|
if (val & 0x10) { /* XPR */
|
|
if (bcs->tx_skb) {
|
|
if (bcs->tx_skb->len) {
|
|
hscx_fill_fifo(bcs);
|
|
return;
|
|
} else {
|
|
if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
|
|
(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
|
|
u_long flags;
|
|
spin_lock_irqsave(&bcs->aclock, flags);
|
|
bcs->ackcnt += bcs->hw.hscx.count;
|
|
spin_unlock_irqrestore(&bcs->aclock, flags);
|
|
schedule_event(bcs, B_ACKPENDING);
|
|
}
|
|
dev_kfree_skb_irq(bcs->tx_skb);
|
|
bcs->hw.hscx.count = 0;
|
|
bcs->tx_skb = NULL;
|
|
}
|
|
}
|
|
if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
|
|
bcs->hw.hscx.count = 0;
|
|
test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
hscx_fill_fifo(bcs);
|
|
} else {
|
|
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
schedule_event(bcs, B_XMTBUFREADY);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
hscx_int_main(struct IsdnCardState *cs, u_char val)
|
|
{
|
|
|
|
u_char exval;
|
|
struct BCState *bcs;
|
|
|
|
if (val & 0x01) {
|
|
bcs = cs->bcs + 1;
|
|
exval = READHSCX(cs, 1, HSCX_EXIR);
|
|
if (exval & 0x40) {
|
|
if (bcs->mode == 1)
|
|
hscx_fill_fifo(bcs);
|
|
else {
|
|
#ifdef ERROR_STATISTIC
|
|
bcs->err_tx++;
|
|
#endif
|
|
/* Here we lost an TX interrupt, so
|
|
* restart transmitting the whole frame.
|
|
*/
|
|
if (bcs->tx_skb) {
|
|
skb_push(bcs->tx_skb, bcs->hw.hscx.count);
|
|
bcs->tx_cnt += bcs->hw.hscx.count;
|
|
bcs->hw.hscx.count = 0;
|
|
}
|
|
WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x01);
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "HSCX B EXIR %x Lost TX", exval);
|
|
}
|
|
} else if (cs->debug & L1_DEB_HSCX)
|
|
debugl1(cs, "HSCX B EXIR %x", exval);
|
|
}
|
|
if (val & 0xf8) {
|
|
if (cs->debug & L1_DEB_HSCX)
|
|
debugl1(cs, "HSCX B interrupt %x", val);
|
|
hscx_interrupt(cs, val, 1);
|
|
}
|
|
if (val & 0x02) {
|
|
bcs = cs->bcs;
|
|
exval = READHSCX(cs, 0, HSCX_EXIR);
|
|
if (exval & 0x40) {
|
|
if (bcs->mode == L1_MODE_TRANS)
|
|
hscx_fill_fifo(bcs);
|
|
else {
|
|
/* Here we lost an TX interrupt, so
|
|
* restart transmitting the whole frame.
|
|
*/
|
|
#ifdef ERROR_STATISTIC
|
|
bcs->err_tx++;
|
|
#endif
|
|
if (bcs->tx_skb) {
|
|
skb_push(bcs->tx_skb, bcs->hw.hscx.count);
|
|
bcs->tx_cnt += bcs->hw.hscx.count;
|
|
bcs->hw.hscx.count = 0;
|
|
}
|
|
WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x01);
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "HSCX A EXIR %x Lost TX", exval);
|
|
}
|
|
} else if (cs->debug & L1_DEB_HSCX)
|
|
debugl1(cs, "HSCX A EXIR %x", exval);
|
|
}
|
|
if (val & 0x04) {
|
|
exval = READHSCX(cs, 0, HSCX_ISTA);
|
|
if (cs->debug & L1_DEB_HSCX)
|
|
debugl1(cs, "HSCX A interrupt %x", exval);
|
|
hscx_interrupt(cs, exval, 0);
|
|
}
|
|
}
|