237 lines
6.2 KiB
C
237 lines
6.2 KiB
C
/* $Id: jade_irq.c,v 1.7.2.4 2004/02/11 13:21:34 keil Exp $
|
|
*
|
|
* Low level JADE IRQ stuff (derived from original hscx_irq.c)
|
|
*
|
|
* Author Roland Klabunde
|
|
* Copyright by Roland Klabunde <R.Klabunde@Berkom.de>
|
|
*
|
|
* This software may be used and distributed according to the terms
|
|
* of the GNU General Public License, incorporated herein by reference.
|
|
*
|
|
*/
|
|
|
|
static inline void
|
|
waitforCEC(struct IsdnCardState *cs, int jade, int reg)
|
|
{
|
|
int to = 50;
|
|
int mask = (reg == jade_HDLC_XCMD ? jadeSTAR_XCEC : jadeSTAR_RCEC);
|
|
while ((READJADE(cs, jade, jade_HDLC_STAR) & mask) && to) {
|
|
udelay(1);
|
|
to--;
|
|
}
|
|
if (!to)
|
|
printk(KERN_WARNING "HiSax: waitforCEC (jade) timeout\n");
|
|
}
|
|
|
|
|
|
static inline void
|
|
waitforXFW(struct IsdnCardState *cs, int jade)
|
|
{
|
|
/* Does not work on older jade versions, don't care */
|
|
}
|
|
|
|
static inline void
|
|
WriteJADECMDR(struct IsdnCardState *cs, int jade, int reg, u_char data)
|
|
{
|
|
waitforCEC(cs, jade, reg);
|
|
WRITEJADE(cs, jade, reg, data);
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
jade_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, "jade_empty_fifo");
|
|
|
|
if (bcs->hw.hscx.rcvidx + count > HSCX_BUFMAX) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "jade_empty_fifo: incoming packet too large");
|
|
WriteJADECMDR(cs, bcs->hw.hscx.hscx, jade_HDLC_RCMD, jadeRCMD_RMC);
|
|
bcs->hw.hscx.rcvidx = 0;
|
|
return;
|
|
}
|
|
ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx;
|
|
bcs->hw.hscx.rcvidx += count;
|
|
READJADEFIFO(cs, bcs->hw.hscx.hscx, ptr, count);
|
|
WriteJADECMDR(cs, bcs->hw.hscx.hscx, jade_HDLC_RCMD, jadeRCMD_RMC);
|
|
if (cs->debug & L1_DEB_HSCX_FIFO) {
|
|
char *t = bcs->blog;
|
|
|
|
t += sprintf(t, "jade_empty_fifo %c cnt %d",
|
|
bcs->hw.hscx.hscx ? 'B' : 'A', count);
|
|
QuickHex(t, ptr, count);
|
|
debugl1(cs, bcs->blog);
|
|
}
|
|
}
|
|
|
|
static void
|
|
jade_fill_fifo(struct BCState *bcs)
|
|
{
|
|
struct IsdnCardState *cs = bcs->cs;
|
|
int more, count;
|
|
int fifo_size = 32;
|
|
u_char *ptr;
|
|
|
|
if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
|
|
debugl1(cs, "jade_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;
|
|
WRITEJADEFIFO(cs, bcs->hw.hscx.hscx, ptr, count);
|
|
WriteJADECMDR(cs, bcs->hw.hscx.hscx, jade_HDLC_XCMD, more ? jadeXCMD_XF : (jadeXCMD_XF | jadeXCMD_XME));
|
|
if (cs->debug & L1_DEB_HSCX_FIFO) {
|
|
char *t = bcs->blog;
|
|
|
|
t += sprintf(t, "jade_fill_fifo %c cnt %d",
|
|
bcs->hw.hscx.hscx ? 'B' : 'A', count);
|
|
QuickHex(t, ptr, count);
|
|
debugl1(cs, bcs->blog);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
jade_interrupt(struct IsdnCardState *cs, u_char val, u_char jade)
|
|
{
|
|
u_char r;
|
|
struct BCState *bcs = cs->bcs + jade;
|
|
struct sk_buff *skb;
|
|
int fifo_size = 32;
|
|
int count;
|
|
int i_jade = (int) jade; /* To satisfy the compiler */
|
|
|
|
if (!test_bit(BC_FLG_INIT, &bcs->Flag))
|
|
return;
|
|
|
|
if (val & 0x80) { /* RME */
|
|
r = READJADE(cs, i_jade, jade_HDLC_RSTA);
|
|
if ((r & 0xf0) != 0xa0) {
|
|
if (!(r & 0x80))
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "JADE %s invalid frame", (jade ? "B" : "A"));
|
|
if ((r & 0x40) && bcs->mode)
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "JADE %c RDO mode=%d", 'A' + jade, bcs->mode);
|
|
if (!(r & 0x20))
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "JADE %c CRC error", 'A' + jade);
|
|
WriteJADECMDR(cs, jade, jade_HDLC_RCMD, jadeRCMD_RMC);
|
|
} else {
|
|
count = READJADE(cs, i_jade, jade_HDLC_RBCL) & 0x1F;
|
|
if (count == 0)
|
|
count = fifo_size;
|
|
jade_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 "JADE %s receive out of memory\n", (jade ? "B" : "A"));
|
|
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 */
|
|
jade_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) {
|
|
jade_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);
|
|
jade_fill_fifo(bcs);
|
|
} else {
|
|
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
schedule_event(bcs, B_XMTBUFREADY);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
jade_int_main(struct IsdnCardState *cs, u_char val, int jade)
|
|
{
|
|
struct BCState *bcs;
|
|
bcs = cs->bcs + jade;
|
|
|
|
if (val & jadeISR_RFO) {
|
|
/* handled with RDO */
|
|
val &= ~jadeISR_RFO;
|
|
}
|
|
if (val & jadeISR_XDU) {
|
|
/* relevant in HDLC mode only */
|
|
/* don't reset XPR here */
|
|
if (bcs->mode == 1)
|
|
jade_fill_fifo(bcs);
|
|
else {
|
|
/* 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;
|
|
}
|
|
WriteJADECMDR(cs, bcs->hw.hscx.hscx, jade_HDLC_XCMD, jadeXCMD_XRES);
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "JADE %c EXIR %x Lost TX", 'A' + jade, val);
|
|
}
|
|
}
|
|
if (val & (jadeISR_RME | jadeISR_RPF | jadeISR_XPR)) {
|
|
if (cs->debug & L1_DEB_HSCX)
|
|
debugl1(cs, "JADE %c interrupt %x", 'A' + jade, val);
|
|
jade_interrupt(cs, val, jade);
|
|
}
|
|
}
|