patch-2.4.20 linux-2.4.20/drivers/isdn/hisax/amd7930_fn.c
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- Lines: 762
- Date:
Thu Nov 28 15:53:13 2002
- Orig file:
linux-2.4.19/drivers/isdn/hisax/amd7930_fn.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/drivers/isdn/hisax/amd7930_fn.c linux-2.4.20/drivers/isdn/hisax/amd7930_fn.c
@@ -0,0 +1,761 @@
+/* gerdes_amd7930.c,v 0.99 2001/10/02
+ *
+ * gerdes_amd7930.c Amd 79C30A and 79C32A specific routines
+ * (based on HiSax driver by Karsten Keil)
+ *
+ * Author Christoph Ersfeld <info@formula-n.de>
+ * Formula-n Europe AG (www.formula-n.com)
+ * previously Gerdes AG
+ *
+ *
+ * This file is (c) under GNU PUBLIC LICENSE
+ *
+ *
+ * Notes:
+ * Version 0.99 is the first release of this driver and there are
+ * certainly a few bugs.
+ *
+ * Please don't report any malfunction to me without sending
+ * (compressed) debug-logs.
+ * It would be nearly impossible to retrace it.
+ *
+ * Log D-channel-processing as follows:
+ *
+ * 1. Load hisax with card-specific parameters, this example ist for
+ * Formula-n enter:now ISDN PCI and compatible
+ * (f.e. Gerdes Power ISDN PCI)
+ *
+ * modprobe hisax type=41 protocol=2 id=gerdes
+ *
+ * if you chose an other value for id, you need to modify the
+ * code below, too.
+ *
+ * 2. set debug-level
+ *
+ * hisaxctrl gerdes 1 0x3ff
+ * hisaxctrl gerdes 11 0x4f
+ * cat /dev/isdnctrl >> ~/log &
+ *
+ * Please take also a look into /var/log/messages if there is
+ * anything importand concerning HISAX.
+ *
+ *
+ * Credits:
+ * Programming the driver for Formula-n enter:now ISDN PCI and
+ * neccessary this driver for the used Amd 7930 D-channel-controller
+ * was spnsored by Formula-n Europe AG.
+ * Thanks to Karsten Keil and Petr Novak, who gave me support in
+ * Hisax-specific questions.
+ * I want so say special thanks to Carl-Friedrich Braun, who had to
+ * answer a lot of questions about generally ISDN and about handling
+ * of the Amd-Chip.
+ *
+ */
+
+
+#define __NO_VERSION__
+#include "hisax.h"
+#include "isdnl1.h"
+#include "isac.h"
+#include "amd7930_fn.h"
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+static void Amd7930_new_ph(struct IsdnCardState *cs);
+
+
+void /* macro wWordAMD */
+WriteWordAmd7930(struct IsdnCardState *cs, BYTE reg, WORD val)
+{
+ wByteAMD(cs, 0x00, reg);
+ wByteAMD(cs, 0x01, LOBYTE(val));
+ wByteAMD(cs, 0x01, HIBYTE(val));
+}
+
+WORD /* macro rWordAMD */
+ReadWordAmd7930(struct IsdnCardState *cs, BYTE reg)
+{
+ WORD res;
+ /* direct access register */
+ if(reg < 8) {
+ res = rByteAMD(cs, reg);
+ res += 256*rByteAMD(cs, reg);
+ }
+ /* indirect access register */
+ else {
+ wByteAMD(cs, 0x00, reg);
+ res = rByteAMD(cs, 0x01);
+ res += 256*rByteAMD(cs, 0x01);
+ }
+ return (res);
+}
+
+
+static void
+Amd7930_ph_command(struct IsdnCardState *cs, u_char command, char *s)
+{
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "AMD7930: %s: ph_command 0x%02X", s, command);
+
+ cs->dc.amd7930.lmr1 = command;
+ wByteAMD(cs, 0xA3, command);
+}
+
+
+
+static BYTE i430States[] = {
+// to reset F3 F4 F5 F6 F7 F8 AR from
+ 0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00, // init
+ 0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00, // reset
+ 0x01, 0x02, 0x00, 0x00, 0x00, 0x09, 0x05, 0x04, // F3
+ 0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00, // F4
+ 0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00, // F5
+ 0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x05, 0x00, // F6
+ 0x11, 0x13, 0x00, 0x00, 0x1B, 0x00, 0x15, 0x00, // F7
+ 0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, // F8
+ 0x01, 0x03, 0x00, 0x00, 0x00, 0x09, 0x00, 0x0A}; // AR
+
+
+/* Row init - reset F3 F4 F5 F6 F7 F8 AR */
+static BYTE stateHelper[] = { 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
+
+
+
+
+static void
+Amd7930_get_state(struct IsdnCardState *cs) {
+ BYTE lsr = rByteAMD(cs, 0xA1);
+ cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
+ Amd7930_new_ph(cs);
+}
+
+
+
+static void
+Amd7930_new_ph(struct IsdnCardState *cs)
+{
+ u_char index = stateHelper[cs->dc.amd7930.old_state]*8 + stateHelper[cs->dc.amd7930.ph_state]-1;
+ u_char message = i430States[index];
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "AMD7930: new_ph %d, old_ph %d, message %d, index %d",
+ cs->dc.amd7930.ph_state, cs->dc.amd7930.old_state, message & 0x0f, index);
+
+ cs->dc.amd7930.old_state = cs->dc.amd7930.ph_state;
+
+ /* abort transmit if nessesary */
+ if ((message & 0xf0) && (cs->tx_skb)) {
+ wByteAMD(cs, 0x21, 0xC2);
+ wByteAMD(cs, 0x21, 0x02);
+ }
+
+ switch (message & 0x0f) {
+
+ case (1):
+ l1_msg(cs, HW_RESET | INDICATION, NULL);
+ Amd7930_get_state(cs);
+ break;
+ case (2): /* init, Card starts in F3 */
+ l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
+ break;
+ case (3):
+ l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
+ break;
+ case (4):
+ l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
+ Amd7930_ph_command(cs, 0x50, "HW_ENABLE REQUEST");
+ break;
+ case (5):
+ l1_msg(cs, HW_RSYNC | INDICATION, NULL);
+ break;
+ case (6):
+ l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
+ break;
+ case (7): /* init, Card starts in F7 */
+ l1_msg(cs, HW_RSYNC | INDICATION, NULL);
+ l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
+ break;
+ case (8):
+ l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
+ /* fall through */
+ case (9):
+ Amd7930_ph_command(cs, 0x40, "HW_ENABLE REQ cleared if set");
+ l1_msg(cs, HW_RSYNC | INDICATION, NULL);
+ l1_msg(cs, HW_INFO2 | INDICATION, NULL);
+ l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
+ break;
+ case (10):
+ Amd7930_ph_command(cs, 0x40, "T3 expired, HW_ENABLE REQ cleared");
+ cs->dc.amd7930.old_state = 3;
+ break;
+ case (11):
+ l1_msg(cs, HW_INFO2 | INDICATION, NULL);
+ break;
+ default:
+ break;
+ }
+}
+
+
+
+static void
+Amd7930_bh(struct IsdnCardState *cs)
+{
+
+ struct PStack *stptr;
+
+ if (!cs)
+ return;
+ if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
+ if (cs->debug)
+ debugl1(cs, "Amd7930: bh, 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)) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "AMD7930: bh, D_L1STATECHANGE");
+ Amd7930_new_ph(cs);
+ }
+
+ if (test_and_clear_bit(D_RCVBUFREADY, &cs->event)) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "AMD7930: bh, D_RCVBUFREADY");
+ DChannel_proc_rcv(cs);
+ }
+
+ if (test_and_clear_bit(D_XMTBUFREADY, &cs->event)) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "AMD7930: bh, D_XMTBUFREADY");
+ DChannel_proc_xmt(cs);
+ }
+}
+
+
+void
+Amd7930_sched_event(struct IsdnCardState *cs, int event) // ok
+{
+
+ if (cs->debug & L1_DEB_ISAC) {
+ debugl1(cs, "AMD7930: sched_event 0x%X", event);
+ }
+
+ test_and_set_bit(event, &cs->event);
+ queue_task(&cs->tqueue, &tq_immediate);
+ mark_bh(IMMEDIATE_BH);
+}
+
+static void
+Amd7930_empty_Dfifo(struct IsdnCardState *cs, int flag)
+{
+
+ BYTE stat, der;
+ BYTE *ptr;
+ struct sk_buff *skb;
+
+
+ if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
+ debugl1(cs, "Amd7930: empty_Dfifo");
+
+
+ ptr = cs->rcvbuf + cs->rcvidx;
+
+ /* AMD interrupts off */
+ AmdIrqOff(cs);
+
+ /* read D-Channel-Fifo*/
+ stat = rByteAMD(cs, 0x07); // DSR2
+
+ /* while Data in Fifo ... */
+ while ( (stat & 2) && ((ptr-cs->rcvbuf) < MAX_DFRAME_LEN_L1) ) {
+ *ptr = rByteAMD(cs, 0x04); // DCRB
+ ptr++;
+ stat = rByteAMD(cs, 0x07); // DSR2
+ cs->rcvidx = ptr - cs->rcvbuf;
+
+ /* Paket ready? */
+ if (stat & 1) {
+
+ der = rWordAMD(cs, 0x03);
+
+ /* no errors, packet ok */
+ if(!der && !flag) {
+ rWordAMD(cs, 0x89); // clear DRCR
+
+ if ((cs->rcvidx) > 0) {
+ if (!(skb = alloc_skb(cs->rcvidx, GFP_ATOMIC)))
+ printk(KERN_WARNING "HiSax: Amd7930: empty_Dfifo, D receive out of memory!\n");
+ else {
+ /* Debugging */
+ if (cs->debug & L1_DEB_ISAC_FIFO) {
+ char *t = cs->dlog;
+
+ t += sprintf(t, "Amd7930: empty_Dfifo cnt: %d |", cs->rcvidx);
+ QuickHex(t, cs->rcvbuf, cs->rcvidx);
+ debugl1(cs, cs->dlog);
+ }
+ /* moves recieved data in sk-buffer */
+ memcpy(skb_put(skb, cs->rcvidx), cs->rcvbuf, cs->rcvidx);
+ skb_queue_tail(&cs->rq, skb);
+ }
+ }
+
+ }
+ /* throw damaged packets away, reset recieve-buffer, indicate RX */
+ ptr = cs->rcvbuf;
+ cs->rcvidx = 0;
+ Amd7930_sched_event(cs, D_RCVBUFREADY);
+ }
+ }
+ /* Packet to long, overflow */
+ if(cs->rcvidx >= MAX_DFRAME_LEN_L1) {
+ if (cs->debug & L1_DEB_WARN)
+ debugl1(cs, "AMD7930: empty_Dfifo L2-Framelength overrun");
+ cs->rcvidx = 0;
+ return;
+ }
+ /* AMD interrupts on */
+ AmdIrqOn(cs);
+}
+
+
+static void
+Amd7930_fill_Dfifo(struct IsdnCardState *cs)
+{
+
+ WORD dtcrr, dtcrw, len, count;
+ BYTE txstat, dmr3;
+ BYTE *ptr, *deb_ptr;
+
+ if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
+ debugl1(cs, "Amd7930: fill_Dfifo");
+
+ if ((!cs->tx_skb) || (cs->tx_skb->len <= 0))
+ return;
+
+ dtcrw = 0;
+ if(!cs->dc.amd7930.tx_xmtlen)
+ /* new Frame */
+ len = dtcrw = cs->tx_skb->len;
+ /* continue frame */
+ else len = cs->dc.amd7930.tx_xmtlen;
+
+
+ /* AMD interrupts off */
+ AmdIrqOff(cs);
+
+ deb_ptr = ptr = cs->tx_skb->data;
+
+ /* while free place in tx-fifo available and data in sk-buffer */
+ txstat = 0x10;
+ while((txstat & 0x10) && (cs->tx_cnt < len)) {
+ wByteAMD(cs, 0x04, *ptr);
+ ptr++;
+ cs->tx_cnt++;
+ txstat= rByteAMD(cs, 0x07);
+ }
+ count = ptr - cs->tx_skb->data;
+ skb_pull(cs->tx_skb, count);
+
+
+ dtcrr = rWordAMD(cs, 0x85); // DTCR
+ dmr3 = rByteAMD(cs, 0x8E);
+
+ if (cs->debug & L1_DEB_ISAC) {
+ debugl1(cs, "Amd7930: fill_Dfifo, DMR3: 0x%02X, DTCR read: 0x%04X write: 0x%02X 0x%02X", dmr3, dtcrr, LOBYTE(dtcrw), HIBYTE(dtcrw));
+ }
+
+ /* writeing of dtcrw starts transmit */
+ if(!cs->dc.amd7930.tx_xmtlen) {
+ wWordAMD(cs, 0x85, dtcrw);
+ cs->dc.amd7930.tx_xmtlen = dtcrw;
+ }
+
+ if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
+ debugl1(cs, "Amd7930: fill_Dfifo 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, "Amd7930: fill_Dfifo cnt: %d |", count);
+ QuickHex(t, deb_ptr, count);
+ debugl1(cs, cs->dlog);
+ }
+ /* AMD interrupts on */
+ AmdIrqOn(cs);
+}
+
+
+void Amd7930_interrupt(struct IsdnCardState *cs, BYTE irflags)
+{
+ BYTE dsr1, dsr2, lsr;
+ WORD der;
+
+ while (irflags)
+ {
+
+ dsr1 = rByteAMD(cs, 0x02);
+ der = rWordAMD(cs, 0x03);
+ dsr2 = rByteAMD(cs, 0x07);
+ lsr = rByteAMD(cs, 0xA1);
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: interrupt: flags: 0x%02X, DSR1: 0x%02X, DSR2: 0x%02X, LSR: 0x%02X, DER=0x%04X", irflags, dsr1, dsr2, lsr, der);
+
+ /* D error -> read DER and DSR2 bit 2 */
+ if (der || (dsr2 & 4)) {
+
+ if (cs->debug & L1_DEB_WARN)
+ debugl1(cs, "Amd7930: interrupt: D error DER=0x%04X", der);
+
+ /* RX, TX abort if collision detected */
+ if (der & 2) {
+ wByteAMD(cs, 0x21, 0xC2);
+ wByteAMD(cs, 0x21, 0x02);
+ 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))
+ Amd7930_sched_event(cs, D_CLEARBUSY);
+ /* restart frame */
+ if (cs->tx_skb) {
+ skb_push(cs->tx_skb, cs->tx_cnt);
+ cs->tx_cnt = 0;
+ cs->dc.amd7930.tx_xmtlen = 0;
+ Amd7930_fill_Dfifo(cs);
+ } else {
+ printk(KERN_WARNING "HiSax: Amd7930 D-Collision, no skb\n");
+ debugl1(cs, "Amd7930: interrupt: D-Collision, no skb");
+ }
+ }
+ /* remove damaged data from fifo */
+ Amd7930_empty_Dfifo(cs, 1);
+
+ 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))
+ Amd7930_sched_event(cs, D_CLEARBUSY);
+ /* restart TX-Frame */
+ if (cs->tx_skb) {
+ skb_push(cs->tx_skb, cs->tx_cnt);
+ cs->tx_cnt = 0;
+ cs->dc.amd7930.tx_xmtlen = 0;
+ Amd7930_fill_Dfifo(cs);
+ }
+ }
+
+ /* D TX FIFO empty -> fill */
+ if (irflags & 1) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: interrupt: clear Timer and fill D-TX-FIFO if data");
+
+ /* AMD interrupts off */
+ AmdIrqOff(cs);
+
+ 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))
+ Amd7930_sched_event(cs, D_CLEARBUSY);
+ if (cs->tx_skb) {
+ if (cs->tx_skb->len)
+ Amd7930_fill_Dfifo(cs);
+ }
+ /* AMD interrupts on */
+ AmdIrqOn(cs);
+ }
+
+
+ /* D RX FIFO full or tiny packet in Fifo -> empty */
+ if ((irflags & 2) || (dsr1 & 2)) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: interrupt: empty D-FIFO");
+ Amd7930_empty_Dfifo(cs, 0);
+ }
+
+
+ /* D-Frame transmit complete */
+ if (dsr1 & 64) {
+ if (cs->debug & L1_DEB_ISAC) {
+ debugl1(cs, "Amd7930: interrupt: transmit packet ready");
+ }
+ /* AMD interrupts off */
+ AmdIrqOff(cs);
+
+ 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))
+ Amd7930_sched_event(cs, D_CLEARBUSY);
+
+ if (cs->tx_skb) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: interrupt: TX-Packet ready, freeing skb");
+ dev_kfree_skb_irq(cs->tx_skb);
+ cs->tx_cnt = 0;
+ cs->dc.amd7930.tx_xmtlen=0;
+ cs->tx_skb = NULL;
+ }
+ if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: interrupt: TX-Packet ready, next packet dequeued");
+ cs->tx_cnt = 0;
+ cs->dc.amd7930.tx_xmtlen=0;
+ Amd7930_fill_Dfifo(cs);
+ }
+ else
+ Amd7930_sched_event(cs, D_XMTBUFREADY);
+ /* AMD interrupts on */
+ AmdIrqOn(cs);
+ }
+
+ /* LIU status interrupt -> read LSR, check statechanges */
+ if (lsr & 0x38) {
+ /* AMD interrupts off */
+ AmdIrqOff(cs);
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd: interrupt: LSR=0x%02X, LIU is in state %d", lsr, ((lsr & 0x7) +2));
+
+ cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
+
+ Amd7930_sched_event(cs, D_L1STATECHANGE);
+ /* AMD interrupts on */
+ AmdIrqOn(cs);
+ }
+
+ /* reads Interrupt-Register again. If there is a new interrupt-flag: restart handler */
+ irflags = rByteAMD(cs, 0x00);
+ }
+
+}
+
+static void
+Amd7930_l1hw(struct PStack *st, int pr, void *arg)
+{
+ struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
+ struct sk_buff *skb = arg;
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: l1hw called, pr: 0x%04X", pr);
+
+ 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);
+ if (cs->tx_skb) {
+ skb_queue_tail(&cs->sq, skb);
+#ifdef L2FRAME_DEBUG /* psa */
+ if (cs->debug & L1_DEB_LAPD)
+ Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA Queued", 0);
+#endif
+ } else {
+ cs->tx_skb = skb;
+ cs->tx_cnt = 0;
+ cs->dc.amd7930.tx_xmtlen=0;
+#ifdef L2FRAME_DEBUG /* psa */
+ if (cs->debug & L1_DEB_LAPD)
+ Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA", 0);
+#endif
+ Amd7930_fill_Dfifo(cs);
+ }
+ break;
+ case (PH_PULL | INDICATION):
+ if (cs->tx_skb) {
+ if (cs->debug & L1_DEB_WARN)
+ debugl1(cs, "Amd7930: l1hw: l2l1 tx_skb exist this shouldn't happen");
+ skb_queue_tail(&cs->sq, skb);
+ break;
+ }
+ 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;
+ cs->dc.amd7930.tx_xmtlen=0;
+#ifdef L2FRAME_DEBUG /* psa */
+ if (cs->debug & L1_DEB_LAPD)
+ Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA_PULLED", 0);
+#endif
+ Amd7930_fill_Dfifo(cs);
+ break;
+ case (PH_PULL | REQUEST):
+#ifdef L2FRAME_DEBUG /* psa */
+ if (cs->debug & L1_DEB_LAPD)
+ debugl1(cs, "Amd7930: l1hw: -> PH_REQUEST_PULL, skb: %s", (cs->tx_skb)? "yes":"no");
+#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):
+
+ if ((cs->dc.amd7930.ph_state == 8))
+ /* b-channels off, PH-AR cleared
+ * change to F3 */
+ Amd7930_ph_command(cs, 0x20, "HW_RESET REQEST"); //LMR1 bit 5
+ else {
+ Amd7930_ph_command(cs, 0x40, "HW_RESET REQUEST");
+ cs->dc.amd7930.ph_state = 2;
+ Amd7930_new_ph(cs);
+ }
+ break;
+ case (HW_ENABLE | REQUEST):
+ cs->dc.amd7930.ph_state = 9;
+ Amd7930_new_ph(cs);
+ break;
+ case (HW_INFO3 | REQUEST):
+ // automatic
+ break;
+ case (HW_TESTLOOP | REQUEST):
+ /* not implemented yet */
+ break;
+ case (HW_DEACTIVATE | RESPONSE):
+ skb_queue_purge(&cs->rq);
+ skb_queue_purge(&cs->sq);
+ if (cs->tx_skb) {
+ dev_kfree_skb(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))
+ Amd7930_sched_event(cs, D_CLEARBUSY);
+ break;
+ default:
+ if (cs->debug & L1_DEB_WARN)
+ debugl1(cs, "Amd7930: l1hw: unknown %04x", pr);
+ break;
+ }
+}
+
+void
+setstack_Amd7930(struct PStack *st, struct IsdnCardState *cs)
+{
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: setstack called");
+
+ st->l1.l1hw = Amd7930_l1hw;
+}
+
+
+void
+DC_Close_Amd7930(struct IsdnCardState *cs) {
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: DC_Close called");
+}
+
+
+static void
+dbusy_timer_handler(struct IsdnCardState *cs)
+{
+ struct PStack *stptr;
+ WORD dtcr, der;
+ BYTE dsr1, dsr2;
+
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: dbusy_timer expired!");
+
+ if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
+ /* D Transmit Byte Count Register:
+ * Counts down packet's number of Bytes, 0 if packet ready */
+ dtcr = rWordAMD(cs, 0x85);
+ dsr1 = rByteAMD(cs, 0x02);
+ dsr2 = rByteAMD(cs, 0x07);
+ der = rWordAMD(cs, 0x03);
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: dbusy_timer_handler: DSR1=0x%02X, DSR2=0x%02X, DER=0x%04X, cs->tx_skb->len=%u, tx_stat=%u, dtcr=%u, cs->tx_cnt=%u", dsr1, dsr2, der, cs->tx_skb->len, cs->dc.amd7930.tx_xmtlen, dtcr, cs->tx_cnt);
+
+ if ((cs->dc.amd7930.tx_xmtlen - dtcr) < cs->tx_cnt) { /* 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;
+ cs->dc.amd7930.tx_xmtlen = 0;
+ } else {
+ printk(KERN_WARNING "HiSax: Amd7930: D-Channel Busy no skb\n");
+ debugl1(cs, "Amd7930: D-Channel Busy no skb");
+
+ }
+ /* Transmitter reset, abort transmit */
+ wByteAMD(cs, 0x21, 0x82);
+ wByteAMD(cs, 0x21, 0x02);
+ cs->irq_func(cs->irq, cs, NULL);
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: dbusy_timer_handler: Transmitter reset");
+ }
+ }
+}
+
+
+
+void __devinit
+Amd7930_init(struct IsdnCardState *cs)
+{
+ WORD *ptr;
+ BYTE cmd, cnt;
+
+ if (cs->debug & L1_DEB_ISAC)
+ debugl1(cs, "Amd7930: initamd called");
+
+ cs->dc.amd7930.tx_xmtlen = 0;
+ cs->dc.amd7930.old_state = 0;
+ cs->dc.amd7930.lmr1 = 0x40;
+ cs->dc.amd7930.ph_command = Amd7930_ph_command;
+ cs->tqueue.routine = (void *) (void *) Amd7930_bh;
+ cs->setstack_d = setstack_Amd7930;
+ cs->DC_Close = DC_Close_Amd7930;
+ cs->dbusytimer.function = (void *) dbusy_timer_handler;
+ cs->dbusytimer.data = (long) cs;
+ init_timer(&cs->dbusytimer);
+
+ /* AMD Initialisation */
+ for (ptr = initAMD; *ptr != 0xFFFF; ) {
+ cmd = LOBYTE(*ptr);
+
+ /* read */
+ if (*ptr++ >= 0x100) {
+ if (cmd < 8)
+ /* setzt Register zurück */
+ rByteAMD(cs, cmd);
+ else {
+ wByteAMD(cs, 0x00, cmd);
+ for (cnt = *ptr++; cnt > 0; cnt--)
+ rByteAMD(cs, 0x01);
+ }
+ }
+ /* write */
+ else if (cmd < 8)
+ wByteAMD(cs, cmd, LOBYTE(*ptr++));
+
+ else {
+ wByteAMD(cs, 0x00, cmd);
+ for (cnt = *ptr++; cnt > 0; cnt--)
+ wByteAMD(cs, 0x01, LOBYTE(*ptr++));
+ }
+ }
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)