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w6692.c

/* $Id: w6692.c,v 1.18.2.4 2004/02/11 13:21:34 keil Exp $
 *
 * Winbond W6692 specific routines
 *
 * Author       Petr Novak
 * Copyright    by Petr Novak        <petr.novak@i.cz>
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/init.h>
#include "hisax.h"
#include "w6692.h"
#include "isdnl1.h"
#include <linux/interrupt.h>
#include <linux/pci.h>

/* table entry in the PCI devices list */
typedef struct {
      int vendor_id;
      int device_id;
      char *vendor_name;
      char *card_name;
} PCI_ENTRY;

static const PCI_ENTRY id_list[] =
{
      {PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_6692, "Winbond", "W6692"},
      {PCI_VENDOR_ID_DYNALINK, PCI_DEVICE_ID_DYNALINK_IS64PH, "Dynalink/AsusCom", "IS64PH"},
      {0, 0, "U.S.Robotics", "ISDN PCI Card TA"}
};

#define W6692_SV_USR   0x16ec
#define W6692_SD_USR   0x3409
#define W6692_WINBOND  0
#define W6692_DYNALINK 1
#define W6692_USR      2

extern const char *CardType[];

static const char *w6692_revision = "$Revision: 1.18.2.4 $";

#define DBUSY_TIMER_VALUE 80

static char *W6692Ver[] =
{"W6692 V00", "W6692 V01", "W6692 V10",
 "W6692 V11"};

static void
W6692Version(struct IsdnCardState *cs, char *s)
{
      int val;

      val = cs->readW6692(cs, W_D_RBCH);
      printk(KERN_INFO "%s Winbond W6692 version (%x): %s\n", s, val, W6692Ver[(val >> 6) & 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, W_CIX, command);
}


static void
W6692_new_ph(struct IsdnCardState *cs)
{
      switch (cs->dc.w6692.ph_state) {
            case (W_L1CMD_RST):
                  ph_command(cs, W_L1CMD_DRC);
                  l1_msg(cs, HW_RESET | INDICATION, NULL);
                  /* fallthru */
            case (W_L1IND_CD):
                  l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
                  break;
            case (W_L1IND_DRD):
                  l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
                  break;
            case (W_L1IND_CE):
                  l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
                  break;
            case (W_L1IND_LD):
                  l1_msg(cs, HW_RSYNC | INDICATION, NULL);
                  break;
            case (W_L1IND_ARD):
                  l1_msg(cs, HW_INFO2 | INDICATION, NULL);
                  break;
            case (W_L1IND_AI8):
                  l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
                  break;
            case (W_L1IND_AI10):
                  l1_msg(cs, HW_INFO4_P10 | INDICATION, NULL);
                  break;
            default:
                  break;
      }
}

static void
W6692_bh(struct work_struct *work)
{
      struct IsdnCardState *cs =
            container_of(work, struct IsdnCardState, tqueue);
      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))
            W6692_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 (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);
 */
}

static void
W6692_empty_fifo(struct IsdnCardState *cs, int count)
{
      u_char *ptr;

      if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
            debugl1(cs, "W6692_empty_fifo");

      if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
            if (cs->debug & L1_DEB_WARN)
                  debugl1(cs, "W6692_empty_fifo overrun %d",
                        cs->rcvidx + count);
            cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_RACK);
            cs->rcvidx = 0;
            return;
      }
      ptr = cs->rcvbuf + cs->rcvidx;
      cs->rcvidx += count;
      cs->readW6692fifo(cs, ptr, count);
      cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_RACK);
      if (cs->debug & L1_DEB_ISAC_FIFO) {
            char *t = cs->dlog;

            t += sprintf(t, "W6692_empty_fifo cnt %d", count);
            QuickHex(t, ptr, count);
            debugl1(cs, cs->dlog);
      }
}

static void
W6692_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, "W6692_fill_fifo");

      if (!cs->tx_skb)
            return;

      count = cs->tx_skb->len;
      if (count <= 0)
            return;

      more = 0;
      if (count > W_D_FIFO_THRESH) {
            more = !0;
            count = W_D_FIFO_THRESH;
      }
      ptr = cs->tx_skb->data;
      skb_pull(cs->tx_skb, count);
      cs->tx_cnt += count;
      cs->writeW6692fifo(cs, ptr, count);
      cs->writeW6692(cs, W_D_CMDR, more ? W_D_CMDR_XMS : (W_D_CMDR_XMS | W_D_CMDR_XME));
      if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
            debugl1(cs, "W6692_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, "W6692_fill_fifo cnt %d", count);
            QuickHex(t, ptr, count);
            debugl1(cs, cs->dlog);
      }
}

static void
W6692B_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, "W6692B_empty_fifo");

      if (bcs->hw.w6692.rcvidx + count > HSCX_BUFMAX) {
            if (cs->debug & L1_DEB_WARN)
                  debugl1(cs, "W6692B_empty_fifo: incoming packet too large");
            cs->BC_Write_Reg(cs, bcs->channel, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
            bcs->hw.w6692.rcvidx = 0;
            return;
      }
      ptr = bcs->hw.w6692.rcvbuf + bcs->hw.w6692.rcvidx;
      bcs->hw.w6692.rcvidx += count;
      READW6692BFIFO(cs, bcs->channel, ptr, count);
      cs->BC_Write_Reg(cs, bcs->channel, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
      if (cs->debug & L1_DEB_HSCX_FIFO) {
            char *t = bcs->blog;

            t += sprintf(t, "W6692B_empty_fifo %c cnt %d",
                       bcs->channel + '1', count);
            QuickHex(t, ptr, count);
            debugl1(cs, bcs->blog);
      }
}

static void
W6692B_fill_fifo(struct BCState *bcs)
{
      struct IsdnCardState *cs = bcs->cs;
      int more, count;
      u_char *ptr;

      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 > W_B_FIFO_THRESH) {
            more = 1;
            count = W_B_FIFO_THRESH;
      } else
            count = bcs->tx_skb->len;

      if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
            debugl1(cs, "W6692B_fill_fifo%s%d", (more ? " ": " last "), count);

      ptr = bcs->tx_skb->data;
      skb_pull(bcs->tx_skb, count);
      bcs->tx_cnt -= count;
      bcs->hw.w6692.count += count;
      WRITEW6692BFIFO(cs, bcs->channel, ptr, count);
      cs->BC_Write_Reg(cs, bcs->channel, W_B_CMDR, W_B_CMDR_RACT | W_B_CMDR_XMS | (more ? 0 : W_B_CMDR_XME));
      if (cs->debug & L1_DEB_HSCX_FIFO) {
            char *t = bcs->blog;

            t += sprintf(t, "W6692B_fill_fifo %c cnt %d",
                       bcs->channel + '1', count);
            QuickHex(t, ptr, count);
            debugl1(cs, bcs->blog);
      }
}

static void
W6692B_interrupt(struct IsdnCardState *cs, u_char bchan)
{
      u_char val;
      u_char r;
      struct BCState *bcs;
      struct sk_buff *skb;
      int count;

      bcs = (cs->bcs->channel == bchan) ? cs->bcs : (cs->bcs+1);
      val = cs->BC_Read_Reg(cs, bchan, W_B_EXIR);
      debugl1(cs, "W6692B chan %d B_EXIR 0x%02X", bchan, val);

      if (!test_bit(BC_FLG_INIT, &bcs->Flag)) {
            debugl1(cs, "W6692B not INIT yet");
            return;
      }
      if (val & W_B_EXI_RME) {      /* RME */
            r = cs->BC_Read_Reg(cs, bchan, W_B_STAR);
            if (r & (W_B_STAR_RDOV | W_B_STAR_CRCE | W_B_STAR_RMB)) {
                  if (cs->debug & L1_DEB_WARN)
                        debugl1(cs, "W6692 B STAR %x", r);
                  if ((r & W_B_STAR_RDOV) && bcs->mode)
                        if (cs->debug & L1_DEB_WARN)
                              debugl1(cs, "W6692 B RDOV mode=%d",
                                    bcs->mode);
                  if (r & W_B_STAR_CRCE)
                        if (cs->debug & L1_DEB_WARN)
                              debugl1(cs, "W6692 B CRC error");
                  cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RRST | W_B_CMDR_RACT);
            } else {
                  count = cs->BC_Read_Reg(cs, bchan, W_B_RBCL) & (W_B_FIFO_THRESH - 1);
                  if (count == 0)
                        count = W_B_FIFO_THRESH;
                  W6692B_empty_fifo(bcs, count);
                  if ((count = bcs->hw.w6692.rcvidx) > 0) {
                        if (cs->debug & L1_DEB_HSCX_FIFO)
                              debugl1(cs, "W6692 Bchan Frame %d", count);
                        if (!(skb = dev_alloc_skb(count)))
                              printk(KERN_WARNING "W6692: Bchan receive out of memory\n");
                        else {
                              memcpy(skb_put(skb, count), bcs->hw.w6692.rcvbuf, count);
                              skb_queue_tail(&bcs->rqueue, skb);
                        }
                  }
            }
            bcs->hw.w6692.rcvidx = 0;
            schedule_event(bcs, B_RCVBUFREADY);
      }
      if (val & W_B_EXI_RMR) {      /* RMR */
            W6692B_empty_fifo(bcs, W_B_FIFO_THRESH);
            r = cs->BC_Read_Reg(cs, bchan, W_B_STAR);
            if (r & W_B_STAR_RDOV) {
                  if (cs->debug & L1_DEB_WARN)
                        debugl1(cs, "W6692 B RDOV(RMR) mode=%d",bcs->mode);
                  cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RRST | W_B_CMDR_RACT);
                  if (bcs->mode != L1_MODE_TRANS)
                        bcs->hw.w6692.rcvidx = 0;
            }
            if (bcs->mode == L1_MODE_TRANS) {
                  /* receive audio data */
                  if (!(skb = dev_alloc_skb(W_B_FIFO_THRESH)))
                        printk(KERN_WARNING "HiSax: receive out of memory\n");
                  else {
                        memcpy(skb_put(skb, W_B_FIFO_THRESH), bcs->hw.w6692.rcvbuf, W_B_FIFO_THRESH);
                        skb_queue_tail(&bcs->rqueue, skb);
                  }
                  bcs->hw.w6692.rcvidx = 0;
                  schedule_event(bcs, B_RCVBUFREADY);
            }
      }
      if (val & W_B_EXI_XDUN) {     /* XDUN */
            cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_XRST | W_B_CMDR_RACT);
            if (cs->debug & L1_DEB_WARN)
                  debugl1(cs, "W6692 B EXIR %x Lost TX", val);
            if (bcs->mode == 1)
                  W6692B_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.w6692.count);
                        bcs->tx_cnt += bcs->hw.w6692.count;
                        bcs->hw.w6692.count = 0;
                  }
            }
            return;
      }
      if (val & W_B_EXI_XFR) {      /* XFR */
            r = cs->BC_Read_Reg(cs, bchan, W_B_STAR);
            if (r & W_B_STAR_XDOW) {
                  if (cs->debug & L1_DEB_WARN)
                        debugl1(cs, "W6692 B STAR %x XDOW", r);
                  cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_XRST | W_B_CMDR_RACT);
                  if (bcs->tx_skb && (bcs->mode != 1)) {
                        skb_push(bcs->tx_skb, bcs->hw.w6692.count);
                        bcs->tx_cnt += bcs->hw.w6692.count;
                        bcs->hw.w6692.count = 0;
                  }
            }
            if (bcs->tx_skb) {
                  if (bcs->tx_skb->len) {
                        W6692B_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.w6692.count;
                              spin_unlock_irqrestore(&bcs->aclock, flags);
                              schedule_event(bcs, B_ACKPENDING);
                        }
                        dev_kfree_skb_irq(bcs->tx_skb);
                        bcs->hw.w6692.count = 0;
                        bcs->tx_skb = NULL;
                  }
            }
            if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
                  bcs->hw.w6692.count = 0;
                  test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
                  W6692B_fill_fifo(bcs);
            } else {
                  test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
                  schedule_event(bcs, B_XMTBUFREADY);
            }
      }
}

static irqreturn_t
W6692_interrupt(int intno, void *dev_id)
{
      struct IsdnCardState    *cs = dev_id;
      u_char                  val, exval, v1;
      struct sk_buff          *skb;
      u_int             count;
      u_long                  flags;
      int               icnt = 5;

      spin_lock_irqsave(&cs->lock, flags);
      val = cs->readW6692(cs, W_ISTA);
      if (!val) {
            spin_unlock_irqrestore(&cs->lock, flags);
            return IRQ_NONE;
      }
      StartW6692:
      if (cs->debug & L1_DEB_ISAC)
            debugl1(cs, "W6692 ISTA %x", val);

      if (val & W_INT_D_RME) {      /* RME */
            exval = cs->readW6692(cs, W_D_RSTA);
            if (exval & (W_D_RSTA_RDOV | W_D_RSTA_CRCE | W_D_RSTA_RMB)) {
                  if (exval & W_D_RSTA_RDOV)
                        if (cs->debug & L1_DEB_WARN)
                              debugl1(cs, "W6692 RDOV");
                  if (exval & W_D_RSTA_CRCE)
                        if (cs->debug & L1_DEB_WARN)
                              debugl1(cs, "W6692 D-channel CRC error");
                  if (exval & W_D_RSTA_RMB)
                        if (cs->debug & L1_DEB_WARN)
                              debugl1(cs, "W6692 D-channel ABORT");
                  cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_RACK | W_D_CMDR_RRST);
            } else {
                  count = cs->readW6692(cs, W_D_RBCL) & (W_D_FIFO_THRESH - 1);
                  if (count == 0)
                        count = W_D_FIFO_THRESH;
                  W6692_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 & W_INT_D_RMR) {      /* RMR */
            W6692_empty_fifo(cs, W_D_FIFO_THRESH);
      }
      if (val & W_INT_D_XFR) {      /* XFR */
            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) {
                        W6692_fill_fifo(cs);
                        goto afterXFR;
                  } 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;
                  W6692_fill_fifo(cs);
            } else
                  schedule_event(cs, D_XMTBUFREADY);
      }
      afterXFR:
      if (val & (W_INT_XINT0 | W_INT_XINT1)) {  /* XINT0/1 - never */
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "W6692 spurious XINT!");
      }
      if (val & W_INT_D_EXI) {      /* EXI */
            exval = cs->readW6692(cs, W_D_EXIR);
            if (cs->debug & L1_DEB_WARN)
                  debugl1(cs, "W6692 D_EXIR %02x", exval);
            if (exval & (W_D_EXI_XDUN | W_D_EXI_XCOL)) {    /* Transmit underrun/collision */
                  debugl1(cs, "W6692 D-chan underrun/collision");
                  printk(KERN_WARNING "HiSax: W6692 XDUN/XCOL\n");
                  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;
                        W6692_fill_fifo(cs);
                  } else {
                        printk(KERN_WARNING "HiSax: W6692 XDUN/XCOL no skb\n");
                        debugl1(cs, "W6692 XDUN/XCOL no skb");
                        cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_XRST);
                  }
            }
            if (exval & W_D_EXI_RDOV) {   /* RDOV */
                  debugl1(cs, "W6692 D-channel RDOV");
                  printk(KERN_WARNING "HiSax: W6692 D-RDOV\n");
                  cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_RRST);
            }
            if (exval & W_D_EXI_TIN2) {   /* TIN2 - never */
                  debugl1(cs, "W6692 spurious TIN2 interrupt");
            }
            if (exval & W_D_EXI_MOC) {    /* MOC - not supported */
                  debugl1(cs, "W6692 spurious MOC interrupt");
                  v1 = cs->readW6692(cs, W_MOSR);
                  debugl1(cs, "W6692 MOSR %02x", v1);
            }
            if (exval & W_D_EXI_ISC) {    /* ISC - Level1 change */
                  v1 = cs->readW6692(cs, W_CIR);
                  if (cs->debug & L1_DEB_ISAC)
                        debugl1(cs, "W6692 ISC CIR=0x%02X", v1);
                  if (v1 & W_CIR_ICC) {
                        cs->dc.w6692.ph_state = v1 & W_CIR_COD_MASK;
                        if (cs->debug & L1_DEB_ISAC)
                              debugl1(cs, "ph_state_change %x", cs->dc.w6692.ph_state);
                        schedule_event(cs, D_L1STATECHANGE);
                  }
                  if (v1 & W_CIR_SCC) {
                        v1 = cs->readW6692(cs, W_SQR);
                        debugl1(cs, "W6692 SCC SQR=0x%02X", v1);
                  }
            }
            if (exval & W_D_EXI_WEXP) {
                  debugl1(cs, "W6692 spurious WEXP interrupt!");
            }
            if (exval & W_D_EXI_TEXP) {
                  debugl1(cs, "W6692 spurious TEXP interrupt!");
            }
      }
      if (val & W_INT_B1_EXI) {
            debugl1(cs, "W6692 B channel 1 interrupt");
            W6692B_interrupt(cs, 0);
      }
      if (val & W_INT_B2_EXI) {
            debugl1(cs, "W6692 B channel 2 interrupt");
            W6692B_interrupt(cs, 1);
      }
      val = cs->readW6692(cs, W_ISTA);
      if (val && icnt) {
            icnt--;
            goto StartW6692;
      }
      if (!icnt) {
            printk(KERN_WARNING "W6692 IRQ LOOP\n");
            cs->writeW6692(cs, W_IMASK, 0xff);
      }
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
W6692_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
                        W6692_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);
                        spin_unlock_irqrestore(&cs->lock, flags);
                        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;
#ifdef L2FRAME_DEBUG          /* psa */
                  if (cs->debug & L1_DEB_LAPD)
                        Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
#endif
                  W6692_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.w6692.ph_state == W_L1IND_DRD)) {
                        ph_command(cs, W_L1CMD_ECK);
                        spin_unlock_irqrestore(&cs->lock, flags);
                  } else {
                        ph_command(cs, W_L1CMD_RST);
                        cs->dc.w6692.ph_state = W_L1CMD_RST;
                        spin_unlock_irqrestore(&cs->lock, flags);
                        W6692_new_ph(cs);
                  }
                  break;
            case (HW_ENABLE | REQUEST):
                  spin_lock_irqsave(&cs->lock, flags);
                  ph_command(cs, W_L1CMD_ECK);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  break;
            case (HW_INFO3 | REQUEST):
                  spin_lock_irqsave(&cs->lock, flags);
                  ph_command(cs, W_L1CMD_AR8);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  break;
            case (HW_TESTLOOP | REQUEST):
                  val = 0;
                  if (1 & (long) arg)
                        val |= 0x0c;
                  if (2 & (long) arg)
                        val |= 0x3;
                  /* !!! 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_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, "W6692_l1hw unknown %04x", pr);
                  break;
      }
}

static void
setstack_W6692(struct PStack *st, struct IsdnCardState *cs)
{
      st->l1.l1hw = W6692_l1hw;
}

static void
DC_Close_W6692(struct IsdnCardState *cs)
{
}

static void
dbusy_timer_handler(struct IsdnCardState *cs)
{
      struct PStack *stptr;
      int rbch, star;
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
      if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
            rbch = cs->readW6692(cs, W_D_RBCH);
            star = cs->readW6692(cs, W_D_STAR);
            if (cs->debug)
                  debugl1(cs, "D-Channel Busy D_RBCH %02x D_STAR %02x",
                        rbch, star);
            if (star & W_D_STAR_XBZ) {    /* 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: W6692 D-Channel Busy no skb\n");
                        debugl1(cs, "D-Channel Busy no skb");
                  }
                  cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_XRST);    /* Transmitter reset */
                  spin_unlock_irqrestore(&cs->lock, flags);
                  cs->irq_func(cs->irq, cs);
                  return;
            }
      }
      spin_unlock_irqrestore(&cs->lock, flags);
}

static void
W6692Bmode(struct BCState *bcs, int mode, int bchan)
{
      struct IsdnCardState *cs = bcs->cs;

      if (cs->debug & L1_DEB_HSCX)
            debugl1(cs, "w6692 %c mode %d ichan %d",
                  '1' + bchan, mode, bchan);
      bcs->mode = mode;
      bcs->channel = bchan;
      bcs->hw.w6692.bchan = bchan;

      switch (mode) {
            case (L1_MODE_NULL):
                  cs->BC_Write_Reg(cs, bchan, W_B_MODE, 0);
                  break;
            case (L1_MODE_TRANS):
                  cs->BC_Write_Reg(cs, bchan, W_B_MODE, W_B_MODE_MMS);
                  break;
            case (L1_MODE_HDLC):
                  cs->BC_Write_Reg(cs, bchan, W_B_MODE, W_B_MODE_ITF);
                  cs->BC_Write_Reg(cs, bchan, W_B_ADM1, 0xff);
                  cs->BC_Write_Reg(cs, bchan, W_B_ADM2, 0xff);
                  break;
      }
      if (mode)
            cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_RRST |
                         W_B_CMDR_RACT | W_B_CMDR_XRST);
      cs->BC_Write_Reg(cs, bchan, W_B_EXIM, 0x00);
}

static void
W6692_l2l1(struct PStack *st, int pr, void *arg)
{
      struct sk_buff *skb = arg;
      struct BCState *bcs = st->l1.bcs; 
      u_long flags;

      switch (pr) {
            case (PH_DATA | REQUEST):
                  spin_lock_irqsave(&bcs->cs->lock, flags);
                  if (bcs->tx_skb) {
                        skb_queue_tail(&bcs->squeue, skb);
                  } else {
                        bcs->tx_skb = skb;
                        test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
                        bcs->hw.w6692.count = 0;
                        bcs->cs->BC_Send_Data(bcs);
                  }
                  spin_unlock_irqrestore(&bcs->cs->lock, flags);
                  break;
            case (PH_PULL | INDICATION):
                  if (bcs->tx_skb) {
                        printk(KERN_WARNING "W6692_l2l1: this shouldn't happen\n");
                        break;
                  }
                  spin_lock_irqsave(&bcs->cs->lock, flags);
                  test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
                  bcs->tx_skb = skb;
                  bcs->hw.w6692.count = 0;
                  bcs->cs->BC_Send_Data(bcs);
                  spin_unlock_irqrestore(&bcs->cs->lock, flags);
                  break;
            case (PH_PULL | REQUEST):
                  if (!bcs->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 (PH_ACTIVATE | REQUEST):
                  spin_lock_irqsave(&bcs->cs->lock, flags);
                  test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
                  W6692Bmode(bcs, st->l1.mode, st->l1.bc);
                  spin_unlock_irqrestore(&bcs->cs->lock, flags);
                  l1_msg_b(st, pr, arg);
                  break;
            case (PH_DEACTIVATE | REQUEST):
                  l1_msg_b(st, pr, arg);
                  break;
            case (PH_DEACTIVATE | CONFIRM):
                  spin_lock_irqsave(&bcs->cs->lock, flags);
                  test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
                  test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
                  W6692Bmode(bcs, 0, st->l1.bc);
                  spin_unlock_irqrestore(&bcs->cs->lock, flags);
                  st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
                  break;
      }
}

static void
close_w6692state(struct BCState *bcs)
{
      W6692Bmode(bcs, 0, bcs->channel);
      if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
            kfree(bcs->hw.w6692.rcvbuf);
            bcs->hw.w6692.rcvbuf = NULL;
            kfree(bcs->blog);
            bcs->blog = NULL;
            skb_queue_purge(&bcs->rqueue);
            skb_queue_purge(&bcs->squeue);
            if (bcs->tx_skb) {
                  dev_kfree_skb_any(bcs->tx_skb);
                  bcs->tx_skb = NULL;
                  test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
            }
      }
}

static int
open_w6692state(struct IsdnCardState *cs, struct BCState *bcs)
{
      if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
            if (!(bcs->hw.w6692.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
                  printk(KERN_WARNING
                         "HiSax: No memory for w6692.rcvbuf\n");
                  test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
                  return (1);
            }
            if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
                  printk(KERN_WARNING
                         "HiSax: No memory for bcs->blog\n");
                  test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
                  kfree(bcs->hw.w6692.rcvbuf);
                  bcs->hw.w6692.rcvbuf = NULL;
                  return (2);
            }
            skb_queue_head_init(&bcs->rqueue);
            skb_queue_head_init(&bcs->squeue);
      }
      bcs->tx_skb = NULL;
      test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
      bcs->event = 0;
      bcs->hw.w6692.rcvidx = 0;
      bcs->tx_cnt = 0;
      return (0);
}

static int
setstack_w6692(struct PStack *st, struct BCState *bcs)
{
      bcs->channel = st->l1.bc;
      if (open_w6692state(st->l1.hardware, bcs))
            return (-1);
      st->l1.bcs = bcs;
      st->l2.l2l1 = W6692_l2l1;
      setstack_manager(st);
      bcs->st = st;
      setstack_l1_B(st);
      return (0);
}

static void resetW6692(struct IsdnCardState *cs)
{
      cs->writeW6692(cs, W_D_CTL, W_D_CTL_SRST);
      mdelay(10);
      cs->writeW6692(cs, W_D_CTL, 0x00);
      mdelay(10);
      cs->writeW6692(cs, W_IMASK, 0xff);
      cs->writeW6692(cs, W_D_SAM, 0xff);
      cs->writeW6692(cs, W_D_TAM, 0xff);
      cs->writeW6692(cs, W_D_EXIM, 0x00);
      cs->writeW6692(cs, W_D_MODE, W_D_MODE_RACT);
      cs->writeW6692(cs, W_IMASK, 0x18);
      if (cs->subtyp == W6692_USR) {
            /* seems that USR implemented some power control features
             * Pin 79 is connected to the oscilator circuit so we
             * have to handle it here
             */
            cs->writeW6692(cs, W_PCTL, 0x80);
            cs->writeW6692(cs, W_XDATA, 0x00);
      }
}

static void initW6692(struct IsdnCardState *cs, int part)
{
      if (part & 1) {
            cs->setstack_d = setstack_W6692;
            cs->DC_Close = DC_Close_W6692;
            cs->dbusytimer.function = (void *) dbusy_timer_handler;
            cs->dbusytimer.data = (long) cs;
            init_timer(&cs->dbusytimer);
            resetW6692(cs);
            ph_command(cs, W_L1CMD_RST);
            cs->dc.w6692.ph_state = W_L1CMD_RST;
            W6692_new_ph(cs);
            ph_command(cs, W_L1CMD_ECK);

            cs->bcs[0].BC_SetStack = setstack_w6692;
            cs->bcs[1].BC_SetStack = setstack_w6692;
            cs->bcs[0].BC_Close = close_w6692state;
            cs->bcs[1].BC_Close = close_w6692state;
            W6692Bmode(cs->bcs, 0, 0);
            W6692Bmode(cs->bcs + 1, 0, 0);
      }
      if (part & 2) {
            /* Reenable all IRQ */
            cs->writeW6692(cs, W_IMASK, 0x18);
            cs->writeW6692(cs, W_D_EXIM, 0x00);
            cs->BC_Write_Reg(cs, 0, W_B_EXIM, 0x00);
            cs->BC_Write_Reg(cs, 1, W_B_EXIM, 0x00);
            /* Reset D-chan receiver and transmitter */
            cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_RRST | W_D_CMDR_XRST);
      }
}

/* Interface functions */

static u_char
ReadW6692(struct IsdnCardState *cs, u_char offset)
{
      return (inb(cs->hw.w6692.iobase + offset));
}

static void
WriteW6692(struct IsdnCardState *cs, u_char offset, u_char value)
{
      outb(value, cs->hw.w6692.iobase + offset);
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      insb(cs->hw.w6692.iobase + W_D_RFIFO, data, size);
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      outsb(cs->hw.w6692.iobase + W_D_XFIFO, data, size);
}

static u_char
ReadW6692B(struct IsdnCardState *cs, int bchan, u_char offset)
{
      return (inb(cs->hw.w6692.iobase + (bchan ? 0x40 : 0) + offset));
}

static void
WriteW6692B(struct IsdnCardState *cs, int bchan, u_char offset, u_char value)
{
      outb(value, cs->hw.w6692.iobase + (bchan ? 0x40 : 0) + offset);
}

static int
w6692_card_msg(struct IsdnCardState *cs, int mt, void *arg)
{
      switch (mt) {
            case CARD_RESET:
                  resetW6692(cs);
                  return (0);
            case CARD_RELEASE:
                  cs->writeW6692(cs, W_IMASK, 0xff);
                  release_region(cs->hw.w6692.iobase, 256);
                  if (cs->subtyp == W6692_USR) {
                        cs->writeW6692(cs, W_XDATA, 0x04);
                  }
                  return (0);
            case CARD_INIT:
                  initW6692(cs, 3);
                  return (0);
            case CARD_TEST:
                  return (0);
      }
      return (0);
}

static int id_idx ;

static struct pci_dev *dev_w6692 __devinitdata = NULL;

int __devinit
setup_w6692(struct IsdnCard *card)
{
      struct IsdnCardState *cs = card->cs;
      char tmp[64];
      u_char found = 0;
      u_char pci_irq = 0;
      u_int pci_ioaddr = 0;

      strcpy(tmp, w6692_revision);
      printk(KERN_INFO "HiSax: W6692 driver Rev. %s\n", HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_W6692)
            return (0);

      while (id_list[id_idx].vendor_id) {
            dev_w6692 = pci_find_device(id_list[id_idx].vendor_id,
                                  id_list[id_idx].device_id,
                                  dev_w6692);
            if (dev_w6692) {
                  if (pci_enable_device(dev_w6692))
                        continue;
                  cs->subtyp = id_idx;
                  break;
            }
            id_idx++;
      }
      if (dev_w6692) {
            found = 1;
            pci_irq = dev_w6692->irq;
            /* I think address 0 is allways the configuration area */
            /* and address 1 is the real IO space KKe 03.09.99 */
            pci_ioaddr = pci_resource_start(dev_w6692, 1);
            /* USR ISDN PCI card TA need some special handling */
            if (cs->subtyp == W6692_WINBOND) {
                  if ((W6692_SV_USR == dev_w6692->subsystem_vendor) &&
                      (W6692_SD_USR == dev_w6692->subsystem_device)) {
                        cs->subtyp = W6692_USR;
                  }
            }
      }
      if (!found) {
            printk(KERN_WARNING "W6692: No PCI card found\n");
            return (0);
      }
      cs->irq = pci_irq;
      if (!cs->irq) {
            printk(KERN_WARNING "W6692: No IRQ for PCI card found\n");
            return (0);
      }
      if (!pci_ioaddr) {
            printk(KERN_WARNING "W6692: NO I/O Base Address found\n");
            return (0);
      }
      cs->hw.w6692.iobase = pci_ioaddr;
      printk(KERN_INFO "Found: %s %s, I/O base: 0x%x, irq: %d\n",
             id_list[cs->subtyp].vendor_name, id_list[cs->subtyp].card_name,
             pci_ioaddr, pci_irq);
      if (!request_region(cs->hw.w6692.iobase, 256, id_list[cs->subtyp].card_name)) {
            printk(KERN_WARNING
                   "HiSax: %s I/O ports %x-%x already in use\n",
                   id_list[cs->subtyp].card_name,
                   cs->hw.w6692.iobase,
                   cs->hw.w6692.iobase + 255);
            return (0);
      }

      printk(KERN_INFO
             "HiSax: %s config irq:%d I/O:%x\n",
             id_list[cs->subtyp].card_name, cs->irq,
             cs->hw.w6692.iobase);

      INIT_WORK(&cs->tqueue, W6692_bh);
      cs->readW6692 = &ReadW6692;
      cs->writeW6692 = &WriteW6692;
      cs->readisacfifo = &ReadISACfifo;
      cs->writeisacfifo = &WriteISACfifo;
      cs->BC_Read_Reg = &ReadW6692B;
      cs->BC_Write_Reg = &WriteW6692B;
      cs->BC_Send_Data = &W6692B_fill_fifo;
      cs->cardmsg = &w6692_card_msg;
      cs->irq_func = &W6692_interrupt;
      cs->irq_flags |= IRQF_SHARED;
      W6692Version(cs, "W6692:");
      printk(KERN_INFO "W6692 ISTA=0x%X\n", ReadW6692(cs, W_ISTA));
      printk(KERN_INFO "W6692 IMASK=0x%X\n", ReadW6692(cs, W_IMASK));
      printk(KERN_INFO "W6692 D_EXIR=0x%X\n", ReadW6692(cs, W_D_EXIR));
      printk(KERN_INFO "W6692 D_EXIM=0x%X\n", ReadW6692(cs, W_D_EXIM));
      printk(KERN_INFO "W6692 D_RSTA=0x%X\n", ReadW6692(cs, W_D_RSTA));
      return (1);
}

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