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aha/drivers/isdn/hisax/isac.c
Julia Lawall 3cad3da3ed drivers/isdn: Drop unnecessary NULL test 
The result of container_of should not be NULL.  In particular, in this case
the argument to the enclosing function has passed though INIT_WORK, which
dereferences it, implying that its container cannot be NULL.

A simplified version of the semantic patch that makes this change is as
follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
identifier fn,work,x,fld;
type T;
expression E1,E2;
statement S;
@@

static fn(struct work_struct *work) {
  ... when != work = E1
  x = container_of(work,T,fld)
  ... when != x = E2
- if (x == NULL) S
  ...
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
2009-07-25 20:22:51 +02:00

678 lines
18 KiB
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/* $Id: isac.c,v 1.31.2.3 2004/01/13 14:31:25 keil Exp $
*
* ISAC specific routines
*
* 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.
*
* For changes and modifications please read
* Documentation/isdn/HiSax.cert
*
*/
#include "hisax.h"
#include "isac.h"
#include "arcofi.h"
#include "isdnl1.h"
#include <linux/interrupt.h>
#include <linux/init.h>
#define DBUSY_TIMER_VALUE 80
#define ARCOFI_USE 1
static char *ISACVer[] __devinitdata =
{"2086/2186 V1.1", "2085 B1", "2085 B2",
"2085 V2.3"};
void __devinit ISACVersion(struct IsdnCardState *cs, char *s)
{
int val;
val = cs->readisac(cs, ISAC_RBCH);
printk(KERN_INFO "%s ISAC version (%x): %s\n", s, val, ISACVer[(val >> 5) & 3]);
}
static void
ph_command(struct IsdnCardState *cs, unsigned int command)
{
if (cs->debug & L1_DEB_ISAC)
debugl1(cs, "ph_command %x", command);
cs->writeisac(cs, ISAC_CIX0, (command << 2) | 3);
}
static void
isac_new_ph(struct IsdnCardState *cs)
{
switch (cs->dc.isac.ph_state) {
case (ISAC_IND_RS):
case (ISAC_IND_EI):
ph_command(cs, ISAC_CMD_DUI);
l1_msg(cs, HW_RESET | INDICATION, NULL);
break;
case (ISAC_IND_DID):
l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
break;
case (ISAC_IND_DR):
l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
break;
case (ISAC_IND_PU):
l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
break;
case (ISAC_IND_RSY):
l1_msg(cs, HW_RSYNC | INDICATION, NULL);
break;
case (ISAC_IND_ARD):
l1_msg(cs, HW_INFO2 | INDICATION, NULL);
break;
case (ISAC_IND_AI8):
l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
break;
case (ISAC_IND_AI10):
l1_msg(cs, HW_INFO4_P10 | INDICATION, NULL);
break;
default:
break;
}
}
static void
isac_bh(struct work_struct *work)
{
struct IsdnCardState *cs =
container_of(work, struct IsdnCardState, tqueue);
struct PStack *stptr;
if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
if (cs->debug)
debugl1(cs, "D-Channel Busy cleared");
stptr = cs->stlist;
while (stptr != NULL) {
stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
stptr = stptr->next;
}
}
if (test_and_clear_bit(D_L1STATECHANGE, &cs->event))
isac_new_ph(cs);
if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
DChannel_proc_rcv(cs);
if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
DChannel_proc_xmt(cs);
#if ARCOFI_USE
if (!test_bit(HW_ARCOFI, &cs->HW_Flags))
return;
if (test_and_clear_bit(D_RX_MON1, &cs->event))
arcofi_fsm(cs, ARCOFI_RX_END, NULL);
if (test_and_clear_bit(D_TX_MON1, &cs->event))
arcofi_fsm(cs, ARCOFI_TX_END, NULL);
#endif
}
static void
isac_empty_fifo(struct IsdnCardState *cs, int count)
{
u_char *ptr;
if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
debugl1(cs, "isac_empty_fifo");
if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "isac_empty_fifo overrun %d",
cs->rcvidx + count);
cs->writeisac(cs, ISAC_CMDR, 0x80);
cs->rcvidx = 0;
return;
}
ptr = cs->rcvbuf + cs->rcvidx;
cs->rcvidx += count;
cs->readisacfifo(cs, ptr, count);
cs->writeisac(cs, ISAC_CMDR, 0x80);
if (cs->debug & L1_DEB_ISAC_FIFO) {
char *t = cs->dlog;
t += sprintf(t, "isac_empty_fifo cnt %d", count);
QuickHex(t, ptr, count);
debugl1(cs, cs->dlog);
}
}
static void
isac_fill_fifo(struct IsdnCardState *cs)
{
int count, more;
u_char *ptr;
if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
debugl1(cs, "isac_fill_fifo");
if (!cs->tx_skb)
return;
count = cs->tx_skb->len;
if (count <= 0)
return;
more = 0;
if (count > 32) {
more = !0;
count = 32;
}
ptr = cs->tx_skb->data;
skb_pull(cs->tx_skb, count);
cs->tx_cnt += count;
cs->writeisacfifo(cs, ptr, count);
cs->writeisac(cs, ISAC_CMDR, more ? 0x8 : 0xa);
if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
debugl1(cs, "isac_fill_fifo dbusytimer running");
del_timer(&cs->dbusytimer);
}
init_timer(&cs->dbusytimer);
cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
add_timer(&cs->dbusytimer);
if (cs->debug & L1_DEB_ISAC_FIFO) {
char *t = cs->dlog;
t += sprintf(t, "isac_fill_fifo cnt %d", count);
QuickHex(t, ptr, count);
debugl1(cs, cs->dlog);
}
}
void
isac_interrupt(struct IsdnCardState *cs, u_char val)
{
u_char exval, v1;
struct sk_buff *skb;
unsigned int count;
if (cs->debug & L1_DEB_ISAC)
debugl1(cs, "ISAC interrupt %x", val);
if (val & 0x80) { /* RME */
exval = cs->readisac(cs, ISAC_RSTA);
if ((exval & 0x70) != 0x20) {
if (exval & 0x40) {
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC RDO");
#ifdef ERROR_STATISTIC
cs->err_rx++;
#endif
}
if (!(exval & 0x20)) {
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC CRC error");
#ifdef ERROR_STATISTIC
cs->err_crc++;
#endif
}
cs->writeisac(cs, ISAC_CMDR, 0x80);
} else {
count = cs->readisac(cs, ISAC_RBCL) & 0x1f;
if (count == 0)
count = 32;
isac_empty_fifo(cs, count);
if ((count = cs->rcvidx) > 0) {
cs->rcvidx = 0;
if (!(skb = alloc_skb(count, GFP_ATOMIC)))
printk(KERN_WARNING "HiSax: D receive out of memory\n");
else {
memcpy(skb_put(skb, count), cs->rcvbuf, count);
skb_queue_tail(&cs->rq, skb);
}
}
}
cs->rcvidx = 0;
schedule_event(cs, D_RCVBUFREADY);
}
if (val & 0x40) { /* RPF */
isac_empty_fifo(cs, 32);
}
if (val & 0x20) { /* RSC */
/* never */
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC RSC interrupt");
}
if (val & 0x10) { /* XPR */
if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
del_timer(&cs->dbusytimer);
if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
schedule_event(cs, D_CLEARBUSY);
if (cs->tx_skb) {
if (cs->tx_skb->len) {
isac_fill_fifo(cs);
goto afterXPR;
} else {
dev_kfree_skb_irq(cs->tx_skb);
cs->tx_cnt = 0;
cs->tx_skb = NULL;
}
}
if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
cs->tx_cnt = 0;
isac_fill_fifo(cs);
} else
schedule_event(cs, D_XMTBUFREADY);
}
afterXPR:
if (val & 0x04) { /* CISQ */
exval = cs->readisac(cs, ISAC_CIR0);
if (cs->debug & L1_DEB_ISAC)
debugl1(cs, "ISAC CIR0 %02X", exval );
if (exval & 2) {
cs->dc.isac.ph_state = (exval >> 2) & 0xf;
if (cs->debug & L1_DEB_ISAC)
debugl1(cs, "ph_state change %x", cs->dc.isac.ph_state);
schedule_event(cs, D_L1STATECHANGE);
}
if (exval & 1) {
exval = cs->readisac(cs, ISAC_CIR1);
if (cs->debug & L1_DEB_ISAC)
debugl1(cs, "ISAC CIR1 %02X", exval );
}
}
if (val & 0x02) { /* SIN */
/* never */
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC SIN interrupt");
}
if (val & 0x01) { /* EXI */
exval = cs->readisac(cs, ISAC_EXIR);
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC EXIR %02x", exval);
if (exval & 0x80) { /* XMR */
debugl1(cs, "ISAC XMR");
printk(KERN_WARNING "HiSax: ISAC XMR\n");
}
if (exval & 0x40) { /* XDU */
debugl1(cs, "ISAC XDU");
printk(KERN_WARNING "HiSax: ISAC XDU\n");
#ifdef ERROR_STATISTIC
cs->err_tx++;
#endif
if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
del_timer(&cs->dbusytimer);
if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
schedule_event(cs, D_CLEARBUSY);
if (cs->tx_skb) { /* Restart frame */
skb_push(cs->tx_skb, cs->tx_cnt);
cs->tx_cnt = 0;
isac_fill_fifo(cs);
} else {
printk(KERN_WARNING "HiSax: ISAC XDU no skb\n");
debugl1(cs, "ISAC XDU no skb");
}
}
if (exval & 0x04) { /* MOS */
v1 = cs->readisac(cs, ISAC_MOSR);
if (cs->debug & L1_DEB_MONITOR)
debugl1(cs, "ISAC MOSR %02x", v1);
#if ARCOFI_USE
if (v1 & 0x08) {
if (!cs->dc.isac.mon_rx) {
if (!(cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC MON RX out of memory!");
cs->dc.isac.mocr &= 0xf0;
cs->dc.isac.mocr |= 0x0a;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
goto afterMONR0;
} else
cs->dc.isac.mon_rxp = 0;
}
if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
cs->dc.isac.mocr &= 0xf0;
cs->dc.isac.mocr |= 0x0a;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
cs->dc.isac.mon_rxp = 0;
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC MON RX overflow!");
goto afterMONR0;
}
cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR0);
if (cs->debug & L1_DEB_MONITOR)
debugl1(cs, "ISAC MOR0 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp -1]);
if (cs->dc.isac.mon_rxp == 1) {
cs->dc.isac.mocr |= 0x04;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
}
}
afterMONR0:
if (v1 & 0x80) {
if (!cs->dc.isac.mon_rx) {
if (!(cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC MON RX out of memory!");
cs->dc.isac.mocr &= 0x0f;
cs->dc.isac.mocr |= 0xa0;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
goto afterMONR1;
} else
cs->dc.isac.mon_rxp = 0;
}
if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
cs->dc.isac.mocr &= 0x0f;
cs->dc.isac.mocr |= 0xa0;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
cs->dc.isac.mon_rxp = 0;
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "ISAC MON RX overflow!");
goto afterMONR1;
}
cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR1);
if (cs->debug & L1_DEB_MONITOR)
debugl1(cs, "ISAC MOR1 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp -1]);
cs->dc.isac.mocr |= 0x40;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
}
afterMONR1:
if (v1 & 0x04) {
cs->dc.isac.mocr &= 0xf0;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
cs->dc.isac.mocr |= 0x0a;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
schedule_event(cs, D_RX_MON0);
}
if (v1 & 0x40) {
cs->dc.isac.mocr &= 0x0f;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
cs->dc.isac.mocr |= 0xa0;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
schedule_event(cs, D_RX_MON1);
}
if (v1 & 0x02) {
if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
(cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
!(v1 & 0x08))) {
cs->dc.isac.mocr &= 0xf0;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
cs->dc.isac.mocr |= 0x0a;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
if (cs->dc.isac.mon_txc &&
(cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
schedule_event(cs, D_TX_MON0);
goto AfterMOX0;
}
if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
schedule_event(cs, D_TX_MON0);
goto AfterMOX0;
}
cs->writeisac(cs, ISAC_MOX0,
cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
if (cs->debug & L1_DEB_MONITOR)
debugl1(cs, "ISAC %02x -> MOX0", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp -1]);
}
AfterMOX0:
if (v1 & 0x20) {
if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
(cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
!(v1 & 0x80))) {
cs->dc.isac.mocr &= 0x0f;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
cs->dc.isac.mocr |= 0xa0;
cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
if (cs->dc.isac.mon_txc &&
(cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
schedule_event(cs, D_TX_MON1);
goto AfterMOX1;
}
if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
schedule_event(cs, D_TX_MON1);
goto AfterMOX1;
}
cs->writeisac(cs, ISAC_MOX1,
cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
if (cs->debug & L1_DEB_MONITOR)
debugl1(cs, "ISAC %02x -> MOX1", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp -1]);
}
AfterMOX1:;
#endif
}
}
}
static void
ISAC_l1hw(struct PStack *st, int pr, void *arg)
{
struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
struct sk_buff *skb = arg;
u_long flags;
int val;
switch (pr) {
case (PH_DATA |REQUEST):
if (cs->debug & DEB_DLOG_HEX)
LogFrame(cs, skb->data, skb->len);
if (cs->debug & DEB_DLOG_VERBOSE)
dlogframe(cs, skb, 0);
spin_lock_irqsave(&cs->lock, flags);
if (cs->tx_skb) {
skb_queue_tail(&cs->sq, skb);
#ifdef L2FRAME_DEBUG /* psa */
if (cs->debug & L1_DEB_LAPD)
Logl2Frame(cs, skb, "PH_DATA Queued", 0);
#endif
} else {
cs->tx_skb = skb;
cs->tx_cnt = 0;
#ifdef L2FRAME_DEBUG /* psa */
if (cs->debug & L1_DEB_LAPD)
Logl2Frame(cs, skb, "PH_DATA", 0);
#endif
isac_fill_fifo(cs);
}
spin_unlock_irqrestore(&cs->lock, flags);
break;
case (PH_PULL |INDICATION):
spin_lock_irqsave(&cs->lock, flags);
if (cs->tx_skb) {
if (cs->debug & L1_DEB_WARN)
debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
skb_queue_tail(&cs->sq, skb);
} else {
if (cs->debug & DEB_DLOG_HEX)
LogFrame(cs, skb->data, skb->len);
if (cs->debug & DEB_DLOG_VERBOSE)
dlogframe(cs, skb, 0);
cs->tx_skb = skb;
cs->tx_cnt = 0;
#ifdef L2FRAME_DEBUG /* psa */
if (cs->debug & L1_DEB_LAPD)
Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
#endif
isac_fill_fifo(cs);
}
spin_unlock_irqrestore(&cs->lock, flags);
break;
case (PH_PULL | REQUEST):
#ifdef L2FRAME_DEBUG /* psa */
if (cs->debug & L1_DEB_LAPD)
debugl1(cs, "-> PH_REQUEST_PULL");
#endif
if (!cs->tx_skb) {
test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
} else
test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
break;
case (HW_RESET | REQUEST):
spin_lock_irqsave(&cs->lock, flags);
if ((cs->dc.isac.ph_state == ISAC_IND_EI) ||
(cs->dc.isac.ph_state == ISAC_IND_DR) ||
(cs->dc.isac.ph_state == ISAC_IND_RS))
ph_command(cs, ISAC_CMD_TIM);
else
ph_command(cs, ISAC_CMD_RS);
spin_unlock_irqrestore(&cs->lock, flags);
break;
case (HW_ENABLE | REQUEST):
spin_lock_irqsave(&cs->lock, flags);
ph_command(cs, ISAC_CMD_TIM);
spin_unlock_irqrestore(&cs->lock, flags);
break;
case (HW_INFO3 | REQUEST):
spin_lock_irqsave(&cs->lock, flags);
ph_command(cs, ISAC_CMD_AR8);
spin_unlock_irqrestore(&cs->lock, flags);
break;
case (HW_TESTLOOP | REQUEST):
spin_lock_irqsave(&cs->lock, flags);
val = 0;
if (1 & (long) arg)
val |= 0x0c;
if (2 & (long) arg)
val |= 0x3;
if (test_bit(HW_IOM1, &cs->HW_Flags)) {
/* IOM 1 Mode */
if (!val) {
cs->writeisac(cs, ISAC_SPCR, 0xa);
cs->writeisac(cs, ISAC_ADF1, 0x2);
} else {
cs->writeisac(cs, ISAC_SPCR, val);
cs->writeisac(cs, ISAC_ADF1, 0xa);
}
} else {
/* IOM 2 Mode */
cs->writeisac(cs, ISAC_SPCR, val);
if (val)
cs->writeisac(cs, ISAC_ADF1, 0x8);
else
cs->writeisac(cs, ISAC_ADF1, 0x0);
}
spin_unlock_irqrestore(&cs->lock, flags);
break;
case (HW_DEACTIVATE | RESPONSE):
skb_queue_purge(&cs->rq);
skb_queue_purge(&cs->sq);
if (cs->tx_skb) {
dev_kfree_skb_any(cs->tx_skb);
cs->tx_skb = NULL;
}
if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
del_timer(&cs->dbusytimer);
if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
schedule_event(cs, D_CLEARBUSY);
break;
default:
if (cs->debug & L1_DEB_WARN)
debugl1(cs, "isac_l1hw unknown %04x", pr);
break;
}
}
static void
setstack_isac(struct PStack *st, struct IsdnCardState *cs)
{
st->l1.l1hw = ISAC_l1hw;
}
static void
DC_Close_isac(struct IsdnCardState *cs)
{
kfree(cs->dc.isac.mon_rx);
cs->dc.isac.mon_rx = NULL;
kfree(cs->dc.isac.mon_tx);
cs->dc.isac.mon_tx = NULL;
}
static void
dbusy_timer_handler(struct IsdnCardState *cs)
{
struct PStack *stptr;
int rbch, star;
if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
rbch = cs->readisac(cs, ISAC_RBCH);
star = cs->readisac(cs, ISAC_STAR);
if (cs->debug)
debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
rbch, star);
if (rbch & ISAC_RBCH_XAC) { /* D-Channel Busy */
test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
stptr = cs->stlist;
while (stptr != NULL) {
stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
stptr = stptr->next;
}
} else {
/* discard frame; reset transceiver */
test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
if (cs->tx_skb) {
dev_kfree_skb_any(cs->tx_skb);
cs->tx_cnt = 0;
cs->tx_skb = NULL;
} else {
printk(KERN_WARNING "HiSax: ISAC D-Channel Busy no skb\n");
debugl1(cs, "D-Channel Busy no skb");
}
cs->writeisac(cs, ISAC_CMDR, 0x01); /* Transmitter reset */
cs->irq_func(cs->irq, cs);
}
}
}
void initisac(struct IsdnCardState *cs)
{
cs->setstack_d = setstack_isac;
cs->DC_Close = DC_Close_isac;
cs->dc.isac.mon_tx = NULL;
cs->dc.isac.mon_rx = NULL;
cs->writeisac(cs, ISAC_MASK, 0xff);
cs->dc.isac.mocr = 0xaa;
if (test_bit(HW_IOM1, &cs->HW_Flags)) {
/* IOM 1 Mode */
cs->writeisac(cs, ISAC_ADF2, 0x0);
cs->writeisac(cs, ISAC_SPCR, 0xa);
cs->writeisac(cs, ISAC_ADF1, 0x2);
cs->writeisac(cs, ISAC_STCR, 0x70);
cs->writeisac(cs, ISAC_MODE, 0xc9);
} else {
/* IOM 2 Mode */
if (!cs->dc.isac.adf2)
cs->dc.isac.adf2 = 0x80;
cs->writeisac(cs, ISAC_ADF2, cs->dc.isac.adf2);
cs->writeisac(cs, ISAC_SQXR, 0x2f);
cs->writeisac(cs, ISAC_SPCR, 0x00);
cs->writeisac(cs, ISAC_STCR, 0x70);
cs->writeisac(cs, ISAC_MODE, 0xc9);
cs->writeisac(cs, ISAC_TIMR, 0x00);
cs->writeisac(cs, ISAC_ADF1, 0x00);
}
ph_command(cs, ISAC_CMD_RS);
cs->writeisac(cs, ISAC_MASK, 0x0);
}
void clear_pending_isac_ints(struct IsdnCardState *cs)
{
int val, eval;
val = cs->readisac(cs, ISAC_STAR);
debugl1(cs, "ISAC STAR %x", val);
val = cs->readisac(cs, ISAC_MODE);
debugl1(cs, "ISAC MODE %x", val);
val = cs->readisac(cs, ISAC_ADF2);
debugl1(cs, "ISAC ADF2 %x", val);
val = cs->readisac(cs, ISAC_ISTA);
debugl1(cs, "ISAC ISTA %x", val);
if (val & 0x01) {
eval = cs->readisac(cs, ISAC_EXIR);
debugl1(cs, "ISAC EXIR %x", eval);
}
val = cs->readisac(cs, ISAC_CIR0);
debugl1(cs, "ISAC CIR0 %x", val);
cs->dc.isac.ph_state = (val >> 2) & 0xf;
schedule_event(cs, D_L1STATECHANGE);
/* Disable all IRQ */
cs->writeisac(cs, ISAC_MASK, 0xFF);
}
void __devinit
setup_isac(struct IsdnCardState *cs)
{
INIT_WORK(&cs->tqueue, isac_bh);
cs->dbusytimer.function = (void *) dbusy_timer_handler;
cs->dbusytimer.data = (long) cs;
init_timer(&cs->dbusytimer);
}
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