/* 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 * 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 * necessary 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. * */ #include "hisax.h" #include "isdnl1.h" #include "isac.h" #include "amd7930_fn.h" #include #include static void Amd7930_new_ph(struct IsdnCardState *cs); static WORD initAMD[] = { 0x0100, 0x00A5, 3, 0x01, 0x40, 0x58, // LPR, LMR1, LMR2 0x0086, 1, 0x0B, // DMR1 (D-Buffer TH-Interrupts on) 0x0087, 1, 0xFF, // DMR2 0x0092, 1, 0x03, // EFCR (extended mode d-channel-fifo on) 0x0090, 4, 0xFE, 0xFF, 0x02, 0x0F, // FRAR4, SRAR4, DMR3, DMR4 (address recognition ) 0x0084, 2, 0x80, 0x00, // DRLR 0x00C0, 1, 0x47, // PPCR1 0x00C8, 1, 0x01, // PPCR2 0x0102, 0x0107, 0x01A1, 1, 0x0121, 1, 0x0189, 2, 0x0045, 4, 0x61, 0x72, 0x00, 0x00, // MCR1, MCR2, MCR3, MCR4 0x0063, 2, 0x08, 0x08, // GX 0x0064, 2, 0x08, 0x08, // GR 0x0065, 2, 0x99, 0x00, // GER 0x0066, 2, 0x7C, 0x8B, // STG 0x0067, 2, 0x00, 0x00, // FTGR1, FTGR2 0x0068, 2, 0x20, 0x20, // ATGR1, ATGR2 0x0069, 1, 0x4F, // MMR1 0x006A, 1, 0x00, // MMR2 0x006C, 1, 0x40, // MMR3 0x0021, 1, 0x02, // INIT 0x00A3, 1, 0x40, // LMR1 0xFFFF }; static 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)); } static 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); } } 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 received 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 receive-buffer, indicate RX */ ptr = cs->rcvbuf; cs->rcvidx = 0; schedule_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)) schedule_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)) schedule_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)) schedule_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)) schedule_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 schedule_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; schedule_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; u_long flags; 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); 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, "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); } 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, "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); spin_unlock_irqrestore(&cs->lock, flags); 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): spin_lock_irqsave(&cs->lock, flags); 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 spin_unlock_irqrestore(&cs->lock, flags); } else { Amd7930_ph_command(cs, 0x40, "HW_RESET REQUEST"); cs->dc.amd7930.ph_state = 2; spin_unlock_irqrestore(&cs->lock, flags); 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)) schedule_event(cs, D_CLEARBUSY); break; default: if (cs->debug & L1_DEB_WARN) debugl1(cs, "Amd7930: l1hw: unknown %04x", pr); break; } } static 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; } static 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) { u_long flags; 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)) { spin_lock_irqsave(&cs->lock, 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; spin_unlock_irqrestore(&cs->lock, flags); 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); spin_unlock_irqrestore(&cs->lock, flags); 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->setstack_d = setstack_Amd7930; cs->DC_Close = DC_Close_Amd7930; /* 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++)); } } } void __devinit setup_Amd7930(struct IsdnCardState *cs) { INIT_WORK(&cs->tqueue, (void *)(void *) Amd7930_bh, cs); cs->dbusytimer.function = (void *) dbusy_timer_handler; cs->dbusytimer.data = (long) cs; init_timer(&cs->dbusytimer); }