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path: root/drivers/isdn/hisax/isac.c
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Diffstat (limited to 'drivers/isdn/hisax/isac.c')
-rw-r--r--drivers/isdn/hisax/isac.c684
1 files changed, 684 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/isac.c b/drivers/isdn/hisax/isac.c
new file mode 100644
index 000000000000..20b949952952
--- /dev/null
+++ b/drivers/isdn/hisax/isac.c
@@ -0,0 +1,684 @@
+/* $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
+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 IsdnCardState *cs)
+{
+ struct PStack *stptr;
+
+ if (!cs)
+ return;
+ 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
+}
+
+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;
+ }
+}
+
+void
+setstack_isac(struct PStack *st, struct IsdnCardState *cs)
+{
+ st->l1.l1hw = ISAC_l1hw;
+}
+
+void
+DC_Close_isac(struct IsdnCardState *cs) {
+ if (cs->dc.isac.mon_rx) {
+ kfree(cs->dc.isac.mon_rx);
+ cs->dc.isac.mon_rx = NULL;
+ }
+ if (cs->dc.isac.mon_tx) {
+ 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, NULL);
+ }
+ }
+}
+
+void __devinit
+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 __devinit
+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, (void *)(void *) isac_bh, cs);
+ cs->dbusytimer.function = (void *) dbusy_timer_handler;
+ cs->dbusytimer.data = (long) cs;
+ init_timer(&cs->dbusytimer);
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-26 07:28:18 +0300