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b1.c

/* $Id: b1.c,v 1.1.2.2 2004/01/16 21:09:27 keil Exp $
 * 
 * Common module for AVM B1 cards.
 * 
 * Copyright 1999 by Carsten Paeth <calle@calle.de>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/capi.h>
#include <linux/kernelcapi.h>
#include <asm/io.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/netdevice.h>
#include <linux/isdn/capilli.h>
#include "avmcard.h"
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>

static char *revision = "$Revision: 1.1.2.2 $";

/* ------------------------------------------------------------- */

MODULE_DESCRIPTION("CAPI4Linux: Common support for active AVM cards");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");

/* ------------------------------------------------------------- */

int b1_irq_table[16] =
{0,
 0,
 0,
 192,                   /* irq 3 */
 32,                    /* irq 4 */
 160,                   /* irq 5 */
 96,                    /* irq 6 */
 224,                   /* irq 7 */
 0,
 64,                    /* irq 9 */
 80,                    /* irq 10 */
 208,                   /* irq 11 */
 48,                    /* irq 12 */
 0,
 0,
 112,                   /* irq 15 */
};

/* ------------------------------------------------------------- */     

avmcard *b1_alloc_card(int nr_controllers)
{
      avmcard *card;
      avmctrl_info *cinfo;
      int i;

      card = kzalloc(sizeof(*card), GFP_KERNEL);
      if (!card)
            return NULL;

      cinfo = kzalloc(sizeof(*cinfo) * nr_controllers, GFP_KERNEL);
      if (!cinfo) {
            kfree(card);
            return NULL;
      }

      card->ctrlinfo = cinfo;
      for (i = 0; i < nr_controllers; i++) {
            INIT_LIST_HEAD(&cinfo[i].ncci_head);
            cinfo[i].card = card;
      }
      spin_lock_init(&card->lock);
      card->nr_controllers = nr_controllers;

      return card;
}

/* ------------------------------------------------------------- */

void b1_free_card(avmcard *card)
{
      kfree(card->ctrlinfo);
      kfree(card);
}

/* ------------------------------------------------------------- */

int b1_detect(unsigned int base, enum avmcardtype cardtype)
{
      int onoff, i;

      /*
       * Statusregister 0000 00xx 
       */
      if ((inb(base + B1_INSTAT) & 0xfc)
          || (inb(base + B1_OUTSTAT) & 0xfc))
            return 1;
      /*
       * Statusregister 0000 001x 
       */
      b1outp(base, B1_INSTAT, 0x2); /* enable irq */
      /* b1outp(base, B1_OUTSTAT, 0x2); */
      if ((inb(base + B1_INSTAT) & 0xfe) != 0x2
          /* || (inb(base + B1_OUTSTAT) & 0xfe) != 0x2 */)
            return 2;
      /*
       * Statusregister 0000 000x 
       */
      b1outp(base, B1_INSTAT, 0x0); /* disable irq */
      b1outp(base, B1_OUTSTAT, 0x0);
      if ((inb(base + B1_INSTAT) & 0xfe)
          || (inb(base + B1_OUTSTAT) & 0xfe))
            return 3;
        
      for (onoff = !0, i= 0; i < 10 ; i++) {
            b1_set_test_bit(base, cardtype, onoff);
            if (b1_get_test_bit(base, cardtype) != onoff)
               return 4;
            onoff = !onoff;
      }

      if (cardtype == avm_m1)
         return 0;

        if ((b1_rd_reg(base, B1_STAT1(cardtype)) & 0x0f) != 0x01)
         return 5;

      return 0;
}

void b1_getrevision(avmcard *card)
{
    card->class = inb(card->port + B1_ANALYSE);
    card->revision = inb(card->port + B1_REVISION);
}

#define FWBUF_SIZE      256
int b1_load_t4file(avmcard *card, capiloaddatapart * t4file)
{
      unsigned char buf[FWBUF_SIZE];
      unsigned char *dp;
      int i, left;
      unsigned int base = card->port;

      dp = t4file->data;
      left = t4file->len;
      while (left > FWBUF_SIZE) {
            if (t4file->user) {
                  if (copy_from_user(buf, dp, FWBUF_SIZE))
                        return -EFAULT;
            } else {
                  memcpy(buf, dp, FWBUF_SIZE);
            }
            for (i = 0; i < FWBUF_SIZE; i++)
                  if (b1_save_put_byte(base, buf[i]) < 0) {
                        printk(KERN_ERR "%s: corrupted firmware file ?\n",
                                    card->name);
                        return -EIO;
                  }
            left -= FWBUF_SIZE;
            dp += FWBUF_SIZE;
      }
      if (left) {
            if (t4file->user) {
                  if (copy_from_user(buf, dp, left))
                        return -EFAULT;
            } else {
                  memcpy(buf, dp, left);
            }
            for (i = 0; i < left; i++)
                  if (b1_save_put_byte(base, buf[i]) < 0) {
                        printk(KERN_ERR "%s: corrupted firmware file ?\n",
                                    card->name);
                        return -EIO;
                  }
      }
      return 0;
}

int b1_load_config(avmcard *card, capiloaddatapart * config)
{
      unsigned char buf[FWBUF_SIZE];
      unsigned char *dp;
      unsigned int base = card->port;
      int i, j, left;

      dp = config->data;
      left = config->len;
      if (left) {
            b1_put_byte(base, SEND_CONFIG);
            b1_put_word(base, 1);
            b1_put_byte(base, SEND_CONFIG);
            b1_put_word(base, left);
      }
      while (left > FWBUF_SIZE) {
            if (config->user) {
                  if (copy_from_user(buf, dp, FWBUF_SIZE))
                        return -EFAULT;
            } else {
                  memcpy(buf, dp, FWBUF_SIZE);
            }
            for (i = 0; i < FWBUF_SIZE; ) {
                  b1_put_byte(base, SEND_CONFIG);
                  for (j=0; j < 4; j++) {
                        b1_put_byte(base, buf[i++]);
                  }
            }
            left -= FWBUF_SIZE;
            dp += FWBUF_SIZE;
      }
      if (left) {
            if (config->user) {
                  if (copy_from_user(buf, dp, left))
                        return -EFAULT;
            } else {
                  memcpy(buf, dp, left);
            }
            for (i = 0; i < left; ) {
                  b1_put_byte(base, SEND_CONFIG);
                  for (j=0; j < 4; j++) {
                        if (i < left)
                              b1_put_byte(base, buf[i++]);
                        else
                              b1_put_byte(base, 0);
                  }
            }
      }
      return 0;
}

int b1_loaded(avmcard *card)
{
      unsigned int base = card->port;
      unsigned long stop;
      unsigned char ans;
      unsigned long tout = 2;

      for (stop = jiffies + tout * HZ; time_before(jiffies, stop);) {
            if (b1_tx_empty(base))
                  break;
      }
      if (!b1_tx_empty(base)) {
            printk(KERN_ERR "%s: b1_loaded: tx err, corrupted t4 file ?\n",
                        card->name);
            return 0;
      }
      b1_put_byte(base, SEND_POLL);
      for (stop = jiffies + tout * HZ; time_before(jiffies, stop);) {
            if (b1_rx_full(base)) {
                  if ((ans = b1_get_byte(base)) == RECEIVE_POLL) {
                        return 1;
                  }
                  printk(KERN_ERR "%s: b1_loaded: got 0x%x, firmware not running\n",
                              card->name, ans);
                  return 0;
            }
      }
      printk(KERN_ERR "%s: b1_loaded: firmware not running\n", card->name);
      return 0;
}

/* ------------------------------------------------------------- */

int b1_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
{
      avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
      avmcard *card = cinfo->card;
      unsigned int port = card->port;
      unsigned long flags;
      int retval;

      b1_reset(port);

      if ((retval = b1_load_t4file(card, &data->firmware))) {
            b1_reset(port);
            printk(KERN_ERR "%s: failed to load t4file!!\n",
                              card->name);
            return retval;
      }

      b1_disable_irq(port);

      if (data->configuration.len > 0 && data->configuration.data) {
            if ((retval = b1_load_config(card, &data->configuration))) {
                  b1_reset(port);
                  printk(KERN_ERR "%s: failed to load config!!\n",
                              card->name);
                  return retval;
            }
      }

      if (!b1_loaded(card)) {
            printk(KERN_ERR "%s: failed to load t4file.\n", card->name);
            return -EIO;
      }

      spin_lock_irqsave(&card->lock, flags);
      b1_setinterrupt(port, card->irq, card->cardtype);
      b1_put_byte(port, SEND_INIT);
      b1_put_word(port, CAPI_MAXAPPL);
      b1_put_word(port, AVM_NCCI_PER_CHANNEL*2);
      b1_put_word(port, ctrl->cnr - 1);
      spin_unlock_irqrestore(&card->lock, flags);

      return 0;
}

void b1_reset_ctr(struct capi_ctr *ctrl)
{
      avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
      avmcard *card = cinfo->card;
      unsigned int port = card->port;
      unsigned long flags;

      b1_reset(port);
      b1_reset(port);

      memset(cinfo->version, 0, sizeof(cinfo->version));
      spin_lock_irqsave(&card->lock, flags);
      capilib_release(&cinfo->ncci_head);
      spin_unlock_irqrestore(&card->lock, flags);
      capi_ctr_reseted(ctrl);
}

void b1_register_appl(struct capi_ctr *ctrl,
                        u16 appl,
                        capi_register_params *rp)
{
      avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
      avmcard *card = cinfo->card;
      unsigned int port = card->port;
      unsigned long flags;
      int nconn, want = rp->level3cnt;

      if (want > 0) nconn = want;
      else nconn = ctrl->profile.nbchannel * -want;
      if (nconn == 0) nconn = ctrl->profile.nbchannel;

      spin_lock_irqsave(&card->lock, flags);
      b1_put_byte(port, SEND_REGISTER);
      b1_put_word(port, appl);
      b1_put_word(port, 1024 * (nconn+1));
      b1_put_word(port, nconn);
      b1_put_word(port, rp->datablkcnt);
      b1_put_word(port, rp->datablklen);
      spin_unlock_irqrestore(&card->lock, flags);
}

void b1_release_appl(struct capi_ctr *ctrl, u16 appl)
{
      avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
      avmcard *card = cinfo->card;
      unsigned int port = card->port;
      unsigned long flags;

      spin_lock_irqsave(&card->lock, flags);
      capilib_release_appl(&cinfo->ncci_head, appl);
      b1_put_byte(port, SEND_RELEASE);
      b1_put_word(port, appl);
      spin_unlock_irqrestore(&card->lock, flags);
}

u16 b1_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
{
      avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
      avmcard *card = cinfo->card;
      unsigned int port = card->port;
      unsigned long flags;
      u16 len = CAPIMSG_LEN(skb->data);
      u8 cmd = CAPIMSG_COMMAND(skb->data);
      u8 subcmd = CAPIMSG_SUBCOMMAND(skb->data);
      u16 dlen, retval;

      spin_lock_irqsave(&card->lock, flags);
      if (CAPICMD(cmd, subcmd) == CAPI_DATA_B3_REQ) {
            retval = capilib_data_b3_req(&cinfo->ncci_head,
                                   CAPIMSG_APPID(skb->data),
                                   CAPIMSG_NCCI(skb->data),
                                   CAPIMSG_MSGID(skb->data));
            if (retval != CAPI_NOERROR) {
                  spin_unlock_irqrestore(&card->lock, flags);
                  return retval;
            }

            dlen = CAPIMSG_DATALEN(skb->data);

            b1_put_byte(port, SEND_DATA_B3_REQ);
            b1_put_slice(port, skb->data, len);
            b1_put_slice(port, skb->data + len, dlen);
      } else {
            b1_put_byte(port, SEND_MESSAGE);
            b1_put_slice(port, skb->data, len);
      }
      spin_unlock_irqrestore(&card->lock, flags);

      dev_kfree_skb_any(skb);
      return CAPI_NOERROR;
}

/* ------------------------------------------------------------- */

void b1_parse_version(avmctrl_info *cinfo)
{
      struct capi_ctr *ctrl = &cinfo->capi_ctrl;
      avmcard *card = cinfo->card;
      capi_profile *profp;
      u8 *dversion;
      u8 flag;
      int i, j;

      for (j = 0; j < AVM_MAXVERSION; j++)
            cinfo->version[j] = "\0\0" + 1;
      for (i = 0, j = 0;
           j < AVM_MAXVERSION && i < cinfo->versionlen;
           j++, i += cinfo->versionbuf[i] + 1)
            cinfo->version[j] = &cinfo->versionbuf[i + 1];

      strlcpy(ctrl->serial, cinfo->version[VER_SERIAL], sizeof(ctrl->serial));
      memcpy(&ctrl->profile, cinfo->version[VER_PROFILE],sizeof(capi_profile));
      strlcpy(ctrl->manu, "AVM GmbH", sizeof(ctrl->manu));
      dversion = cinfo->version[VER_DRIVER];
      ctrl->version.majorversion = 2;
      ctrl->version.minorversion = 0;
      ctrl->version.majormanuversion = (((dversion[0] - '0') & 0xf) << 4);
      ctrl->version.majormanuversion |= ((dversion[2] - '0') & 0xf);
      ctrl->version.minormanuversion = (dversion[3] - '0') << 4;
      ctrl->version.minormanuversion |=
                  (dversion[5] - '0') * 10 + ((dversion[6] - '0') & 0xf);

      profp = &ctrl->profile;

      flag = ((u8 *)(profp->manu))[1];
      switch (flag) {
      case 0: if (cinfo->version[VER_CARDTYPE])
                 strcpy(cinfo->cardname, cinfo->version[VER_CARDTYPE]);
              else strcpy(cinfo->cardname, "B1");
            break;
      case 3: strcpy(cinfo->cardname,"PCMCIA B"); break;
      case 4: strcpy(cinfo->cardname,"PCMCIA M1"); break;
      case 5: strcpy(cinfo->cardname,"PCMCIA M2"); break;
      case 6: strcpy(cinfo->cardname,"B1 V3.0"); break;
      case 7: strcpy(cinfo->cardname,"B1 PCI"); break;
      default: sprintf(cinfo->cardname, "AVM?%u", (unsigned int)flag); break;
        }
        printk(KERN_NOTICE "%s: card %d \"%s\" ready.\n",
                        card->name, ctrl->cnr, cinfo->cardname);

        flag = ((u8 *)(profp->manu))[3];
        if (flag)
            printk(KERN_NOTICE "%s: card %d Protocol:%s%s%s%s%s%s%s\n",
                  card->name,
                  ctrl->cnr,
                  (flag & 0x01) ? " DSS1" : "",
                  (flag & 0x02) ? " CT1" : "",
                  (flag & 0x04) ? " VN3" : "",
                  (flag & 0x08) ? " NI1" : "",
                  (flag & 0x10) ? " AUSTEL" : "",
                  (flag & 0x20) ? " ESS" : "",
                  (flag & 0x40) ? " 1TR6" : ""
                  );

        flag = ((u8 *)(profp->manu))[5];
      if (flag)
            printk(KERN_NOTICE "%s: card %d Linetype:%s%s%s%s\n",
                  card->name,
                  ctrl->cnr,
                  (flag & 0x01) ? " point to point" : "",
                  (flag & 0x02) ? " point to multipoint" : "",
                  (flag & 0x08) ? " leased line without D-channel" : "",
                  (flag & 0x04) ? " leased line with D-channel" : ""
                  );
}

/* ------------------------------------------------------------- */

irqreturn_t b1_interrupt(int interrupt, void *devptr)
{
      avmcard *card = devptr;
      avmctrl_info *cinfo = &card->ctrlinfo[0];
      struct capi_ctr *ctrl = &cinfo->capi_ctrl;
      unsigned char b1cmd;
      struct sk_buff *skb;

      unsigned ApplId;
      unsigned MsgLen;
      unsigned DataB3Len;
      unsigned NCCI;
      unsigned WindowSize;
      unsigned long flags;

      spin_lock_irqsave(&card->lock, flags);

      if (!b1_rx_full(card->port)) {
            spin_unlock_irqrestore(&card->lock, flags);
            return IRQ_NONE;
      }

      b1cmd = b1_get_byte(card->port);

      switch (b1cmd) {

      case RECEIVE_DATA_B3_IND:

            ApplId = (unsigned) b1_get_word(card->port);
            MsgLen = b1_get_slice(card->port, card->msgbuf);
            DataB3Len = b1_get_slice(card->port, card->databuf);
            spin_unlock_irqrestore(&card->lock, flags);

            if (MsgLen < 30) { /* not CAPI 64Bit */
                  memset(card->msgbuf+MsgLen, 0, 30-MsgLen);
                  MsgLen = 30;
                  CAPIMSG_SETLEN(card->msgbuf, 30);
            }
            if (!(skb = alloc_skb(DataB3Len + MsgLen, GFP_ATOMIC))) {
                  printk(KERN_ERR "%s: incoming packet dropped\n",
                              card->name);
            } else {
                  memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
                  memcpy(skb_put(skb, DataB3Len), card->databuf, DataB3Len);
                  capi_ctr_handle_message(ctrl, ApplId, skb);
            }
            break;

      case RECEIVE_MESSAGE:

            ApplId = (unsigned) b1_get_word(card->port);
            MsgLen = b1_get_slice(card->port, card->msgbuf);
            if (!(skb = alloc_skb(MsgLen, GFP_ATOMIC))) {
                  printk(KERN_ERR "%s: incoming packet dropped\n",
                              card->name);
                  spin_unlock_irqrestore(&card->lock, flags);
            } else {
                  memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
                  if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_CONF)
                        capilib_data_b3_conf(&cinfo->ncci_head, ApplId,
                                         CAPIMSG_NCCI(skb->data),
                                         CAPIMSG_MSGID(skb->data));
                  spin_unlock_irqrestore(&card->lock, flags);
                  capi_ctr_handle_message(ctrl, ApplId, skb);
            }
            break;

      case RECEIVE_NEW_NCCI:

            ApplId = b1_get_word(card->port);
            NCCI = b1_get_word(card->port);
            WindowSize = b1_get_word(card->port);
            capilib_new_ncci(&cinfo->ncci_head, ApplId, NCCI, WindowSize);
            spin_unlock_irqrestore(&card->lock, flags);
            break;

      case RECEIVE_FREE_NCCI:

            ApplId = b1_get_word(card->port);
            NCCI = b1_get_word(card->port);
            if (NCCI != 0xffffffff)
                  capilib_free_ncci(&cinfo->ncci_head, ApplId, NCCI);
            spin_unlock_irqrestore(&card->lock, flags);
            break;

      case RECEIVE_START:
            /* b1_put_byte(card->port, SEND_POLLACK); */
            spin_unlock_irqrestore(&card->lock, flags);
            capi_ctr_resume_output(ctrl);
            break;

      case RECEIVE_STOP:
            spin_unlock_irqrestore(&card->lock, flags);
            capi_ctr_suspend_output(ctrl);
            break;

      case RECEIVE_INIT:

            cinfo->versionlen = b1_get_slice(card->port, cinfo->versionbuf);
            spin_unlock_irqrestore(&card->lock, flags);
            b1_parse_version(cinfo);
            printk(KERN_INFO "%s: %s-card (%s) now active\n",
                   card->name,
                   cinfo->version[VER_CARDTYPE],
                   cinfo->version[VER_DRIVER]);
            capi_ctr_ready(ctrl);
            break;

      case RECEIVE_TASK_READY:
            ApplId = (unsigned) b1_get_word(card->port);
            MsgLen = b1_get_slice(card->port, card->msgbuf);
            spin_unlock_irqrestore(&card->lock, flags);
            card->msgbuf[MsgLen] = 0;
            while (    MsgLen > 0
                   && (   card->msgbuf[MsgLen-1] == '\n'
                     || card->msgbuf[MsgLen-1] == '\r')) {
                  card->msgbuf[MsgLen-1] = 0;
                  MsgLen--;
            }
            printk(KERN_INFO "%s: task %d \"%s\" ready.\n",
                        card->name, ApplId, card->msgbuf);
            break;

      case RECEIVE_DEBUGMSG:
            MsgLen = b1_get_slice(card->port, card->msgbuf);
            spin_unlock_irqrestore(&card->lock, flags);
            card->msgbuf[MsgLen] = 0;
            while (    MsgLen > 0
                   && (   card->msgbuf[MsgLen-1] == '\n'
                     || card->msgbuf[MsgLen-1] == '\r')) {
                  card->msgbuf[MsgLen-1] = 0;
                  MsgLen--;
            }
            printk(KERN_INFO "%s: DEBUG: %s\n", card->name, card->msgbuf);
            break;

      case 0xff:
            spin_unlock_irqrestore(&card->lock, flags);
            printk(KERN_ERR "%s: card removed ?\n", card->name);
            return IRQ_NONE;
      default:
            spin_unlock_irqrestore(&card->lock, flags);
            printk(KERN_ERR "%s: b1_interrupt: 0x%x ???\n",
                        card->name, b1cmd);
            return IRQ_HANDLED;
      }
      return IRQ_HANDLED;
}

/* ------------------------------------------------------------- */
int b1ctl_read_proc(char *page, char **start, off_t off,
                  int count, int *eof, struct capi_ctr *ctrl)
{
      avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
      avmcard *card = cinfo->card;
      u8 flag;
      int len = 0;
      char *s;

      len += sprintf(page+len, "%-16s %s\n", "name", card->name);
      len += sprintf(page+len, "%-16s 0x%x\n", "io", card->port);
      len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
      switch (card->cardtype) {
      case avm_b1isa: s = "B1 ISA"; break;
      case avm_b1pci: s = "B1 PCI"; break;
      case avm_b1pcmcia: s = "B1 PCMCIA"; break;
      case avm_m1: s = "M1"; break;
      case avm_m2: s = "M2"; break;
      case avm_t1isa: s = "T1 ISA (HEMA)"; break;
      case avm_t1pci: s = "T1 PCI"; break;
      case avm_c4: s = "C4"; break;
      case avm_c2: s = "C2"; break;
      default: s = "???"; break;
      }
      len += sprintf(page+len, "%-16s %s\n", "type", s);
      if (card->cardtype == avm_t1isa)
         len += sprintf(page+len, "%-16s %d\n", "cardnr", card->cardnr);
      if ((s = cinfo->version[VER_DRIVER]) != 0)
         len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
      if ((s = cinfo->version[VER_CARDTYPE]) != 0)
         len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
      if ((s = cinfo->version[VER_SERIAL]) != 0)
         len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);

      if (card->cardtype != avm_m1) {
            flag = ((u8 *)(ctrl->profile.manu))[3];
            if (flag)
                  len += sprintf(page+len, "%-16s%s%s%s%s%s%s%s\n",
                  "protocol",
                  (flag & 0x01) ? " DSS1" : "",
                  (flag & 0x02) ? " CT1" : "",
                  (flag & 0x04) ? " VN3" : "",
                  (flag & 0x08) ? " NI1" : "",
                  (flag & 0x10) ? " AUSTEL" : "",
                  (flag & 0x20) ? " ESS" : "",
                  (flag & 0x40) ? " 1TR6" : ""
                  );
      }
      if (card->cardtype != avm_m1) {
            flag = ((u8 *)(ctrl->profile.manu))[5];
            if (flag)
                  len += sprintf(page+len, "%-16s%s%s%s%s\n",
                  "linetype",
                  (flag & 0x01) ? " point to point" : "",
                  (flag & 0x02) ? " point to multipoint" : "",
                  (flag & 0x08) ? " leased line without D-channel" : "",
                  (flag & 0x04) ? " leased line with D-channel" : ""
                  );
      }
      len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);

      if (off+count >= len)
         *eof = 1;
      if (len < off)
           return 0;
      *start = page + off;
      return ((count < len-off) ? count : len-off);
}

/* ------------------------------------------------------------- */

#ifdef CONFIG_PCI

avmcard_dmainfo *
avmcard_dma_alloc(char *name, struct pci_dev *pdev, long rsize, long ssize)
{
      avmcard_dmainfo *p;
      void *buf;

      p = kzalloc(sizeof(avmcard_dmainfo), GFP_KERNEL);
      if (!p) {
            printk(KERN_WARNING "%s: no memory.\n", name);
            goto err;
      }

      p->recvbuf.size = rsize;
      buf = pci_alloc_consistent(pdev, rsize, &p->recvbuf.dmaaddr);
      if (!buf) {
            printk(KERN_WARNING "%s: allocation of receive dma buffer failed.\n", name);
            goto err_kfree;
      }
      p->recvbuf.dmabuf = buf;

      p->sendbuf.size = ssize;
      buf = pci_alloc_consistent(pdev, ssize, &p->sendbuf.dmaaddr);
      if (!buf) {
            printk(KERN_WARNING "%s: allocation of send dma buffer failed.\n", name);
            goto err_free_consistent;
      }

      p->sendbuf.dmabuf = buf;
      skb_queue_head_init(&p->send_queue);

      return p;

 err_free_consistent:
      pci_free_consistent(p->pcidev, p->recvbuf.size,
                      p->recvbuf.dmabuf, p->recvbuf.dmaaddr);
 err_kfree:
      kfree(p);
 err:
      return NULL;
}

void avmcard_dma_free(avmcard_dmainfo *p)
{
      pci_free_consistent(p->pcidev, p->recvbuf.size,
                      p->recvbuf.dmabuf, p->recvbuf.dmaaddr);
      pci_free_consistent(p->pcidev, p->sendbuf.size,
                      p->sendbuf.dmabuf, p->sendbuf.dmaaddr);
      skb_queue_purge(&p->send_queue);
      kfree(p);
}

EXPORT_SYMBOL(avmcard_dma_alloc);
EXPORT_SYMBOL(avmcard_dma_free);

#endif

EXPORT_SYMBOL(b1_irq_table);

EXPORT_SYMBOL(b1_alloc_card);
EXPORT_SYMBOL(b1_free_card);
EXPORT_SYMBOL(b1_detect);
EXPORT_SYMBOL(b1_getrevision);
EXPORT_SYMBOL(b1_load_t4file);
EXPORT_SYMBOL(b1_load_config);
EXPORT_SYMBOL(b1_loaded);
EXPORT_SYMBOL(b1_load_firmware);
EXPORT_SYMBOL(b1_reset_ctr);
EXPORT_SYMBOL(b1_register_appl);
EXPORT_SYMBOL(b1_release_appl);
EXPORT_SYMBOL(b1_send_message);

EXPORT_SYMBOL(b1_parse_version);
EXPORT_SYMBOL(b1_interrupt);

EXPORT_SYMBOL(b1ctl_read_proc);

static int __init b1_init(void)
{
      char *p;
      char rev[32];

      if ((p = strchr(revision, ':')) != 0 && p[1]) {
            strlcpy(rev, p + 2, 32);
            if ((p = strchr(rev, '$')) != 0 && p > rev)
               *(p-1) = 0;
      } else
            strcpy(rev, "1.0");

      printk(KERN_INFO "b1: revision %s\n", rev);

      return 0;
}

static void __exit b1_exit(void)
{
}

module_init(b1_init);
module_exit(b1_exit);

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