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ix1_micro.c

/* $Id: ix1_micro.c,v 2.12.2.4 2004/01/13 23:48:39 keil Exp $
 *
 * low level stuff for ITK ix1-micro Rev.2 isdn cards
 * derived from the original file teles3.c from Karsten Keil
 *
 * Author       Klaus-Peter Nischke
 * Copyright    by Klaus-Peter Nischke, ITK AG
 *                                   <klaus@nischke.do.eunet.de>
 *              by Karsten Keil      <keil@isdn4linux.de>
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * Klaus-Peter Nischke
 * Deusener Str. 287
 * 44369 Dortmund
 * Germany
 */

#include <linux/init.h>
#include <linux/isapnp.h>
#include "hisax.h"
#include "isac.h"
#include "hscx.h"
#include "isdnl1.h"

extern const char *CardType[];
static const char *ix1_revision = "$Revision: 2.12.2.4 $";

#define byteout(addr,val) outb(val,addr)
#define bytein(addr) inb(addr)

#define SPECIAL_PORT_OFFSET 3

#define ISAC_COMMAND_OFFSET 2
#define ISAC_DATA_OFFSET 0
#define HSCX_COMMAND_OFFSET 2
#define HSCX_DATA_OFFSET 1

#define TIMEOUT 50

static inline u_char
readreg(unsigned int ale, unsigned int adr, u_char off)
{
      register u_char ret;

      byteout(ale, off);
      ret = bytein(adr);
      return (ret);
}

static inline void
readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
{
      byteout(ale, off);
      insb(adr, data, size);
}


static inline void
writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
{
      byteout(ale, off);
      byteout(adr, data);
}

static inline void
writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
{
      byteout(ale, off);
      outsb(adr, data, size);
}

/* Interface functions */

static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
      return (readreg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, offset));
}

static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
      writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, offset, value);
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      readfifo(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, 0, data, size);
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      writefifo(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, 0, data, size);
}

static u_char
ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
{
      return (readreg(cs->hw.ix1.hscx_ale,
                  cs->hw.ix1.hscx, offset + (hscx ? 0x40 : 0)));
}

static void
WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
{
      writereg(cs->hw.ix1.hscx_ale,
             cs->hw.ix1.hscx, offset + (hscx ? 0x40 : 0), value);
}

#define READHSCX(cs, nr, reg) readreg(cs->hw.ix1.hscx_ale, \
            cs->hw.ix1.hscx, reg + (nr ? 0x40 : 0))
#define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.ix1.hscx_ale, \
            cs->hw.ix1.hscx, reg + (nr ? 0x40 : 0), data)

#define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ix1.hscx_ale, \
            cs->hw.ix1.hscx, (nr ? 0x40 : 0), ptr, cnt)

#define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.ix1.hscx_ale, \
            cs->hw.ix1.hscx, (nr ? 0x40 : 0), ptr, cnt)

#include "hscx_irq.c"

static irqreturn_t
ix1micro_interrupt(int intno, void *dev_id)
{
      struct IsdnCardState *cs = dev_id;
      u_char val;
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
      val = readreg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_ISTA + 0x40);
      Start_HSCX:
      if (val)
            hscx_int_main(cs, val);
      val = readreg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_ISTA);
      Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = readreg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_ISTA + 0x40);
      if (val) {
            if (cs->debug & L1_DEB_HSCX)
                  debugl1(cs, "HSCX IntStat after IntRoutine");
            goto Start_HSCX;
      }
      val = readreg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK, 0xFF);
      writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK + 0x40, 0xFF);
      writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_MASK, 0xFF);
      writereg(cs->hw.ix1.isac_ale, cs->hw.ix1.isac, ISAC_MASK, 0);
      writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK, 0);
      writereg(cs->hw.ix1.hscx_ale, cs->hw.ix1.hscx, HSCX_MASK + 0x40, 0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
release_io_ix1micro(struct IsdnCardState *cs)
{
      if (cs->hw.ix1.cfg_reg)
            release_region(cs->hw.ix1.cfg_reg, 4);
}

static void
ix1_reset(struct IsdnCardState *cs)
{
      int cnt;

      /* reset isac */
      cnt = 3 * (HZ / 10) + 1;
      while (cnt--) {
            byteout(cs->hw.ix1.cfg_reg + SPECIAL_PORT_OFFSET, 1);
            HZDELAY(1); /* wait >=10 ms */
      }
      byteout(cs->hw.ix1.cfg_reg + SPECIAL_PORT_OFFSET, 0);
}

static int
ix1_card_msg(struct IsdnCardState *cs, int mt, void *arg)
{
      u_long flags;

      switch (mt) {
            case CARD_RESET:
                  spin_lock_irqsave(&cs->lock, flags);
                  ix1_reset(cs);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_RELEASE:
                  release_io_ix1micro(cs);
                  return(0);
            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  ix1_reset(cs);
                  inithscxisac(cs, 3);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_TEST:
                  return(0);
      }
      return(0);
}

#ifdef __ISAPNP__
static struct isapnp_device_id itk_ids[] __devinitdata = {
      { ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x25),
        ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x25), 
        (unsigned long) "ITK micro 2" },
      { ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x29),
        ISAPNP_VENDOR('I', 'T', 'K'), ISAPNP_FUNCTION(0x29), 
        (unsigned long) "ITK micro 2." },
      { 0, }
};

static struct isapnp_device_id *ipid __devinitdata = &itk_ids[0];
static struct pnp_card *pnp_c __devinitdata = NULL;
#endif


int __devinit
setup_ix1micro(struct IsdnCard *card)
{
      struct IsdnCardState *cs = card->cs;
      char tmp[64];

      strcpy(tmp, ix1_revision);
      printk(KERN_INFO "HiSax: ITK IX1 driver Rev. %s\n", HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_IX1MICROR2)
            return (0);

#ifdef __ISAPNP__
      if (!card->para[1] && isapnp_present()) {
            struct pnp_dev *pnp_d;
            while(ipid->card_vendor) {
                  if ((pnp_c = pnp_find_card(ipid->card_vendor,
                        ipid->card_device, pnp_c))) {
                        pnp_d = NULL;
                        if ((pnp_d = pnp_find_dev(pnp_c,
                              ipid->vendor, ipid->function, pnp_d))) {
                              int err;

                              printk(KERN_INFO "HiSax: %s detected\n",
                                    (char *)ipid->driver_data);
                              pnp_disable_dev(pnp_d);
                              err = pnp_activate_dev(pnp_d);
                              if (err<0) {
                                    printk(KERN_WARNING "%s: pnp_activate_dev ret(%d)\n",
                                          __FUNCTION__, err);
                                    return(0);
                              }
                              card->para[1] = pnp_port_start(pnp_d, 0);
                              card->para[0] = pnp_irq(pnp_d, 0);
                              if (!card->para[0] || !card->para[1]) {
                                    printk(KERN_ERR "ITK PnP:some resources are missing %ld/%lx\n",
                                          card->para[0], card->para[1]);
                                    pnp_disable_dev(pnp_d);
                                    return(0);
                              }
                              break;
                        } else {
                              printk(KERN_ERR "ITK PnP: PnP error card found, no device\n");
                        }
                  }
                  ipid++;
                  pnp_c = NULL;
            } 
            if (!ipid->card_vendor) {
                  printk(KERN_INFO "ITK PnP: no ISAPnP card found\n");
                  return(0);
            }
      }
#endif
      /* IO-Ports */
      cs->hw.ix1.isac_ale = card->para[1] + ISAC_COMMAND_OFFSET;
      cs->hw.ix1.hscx_ale = card->para[1] + HSCX_COMMAND_OFFSET;
      cs->hw.ix1.isac = card->para[1] + ISAC_DATA_OFFSET;
      cs->hw.ix1.hscx = card->para[1] + HSCX_DATA_OFFSET;
      cs->hw.ix1.cfg_reg = card->para[1];
      cs->irq = card->para[0];
      if (cs->hw.ix1.cfg_reg) {
            if (!request_region(cs->hw.ix1.cfg_reg, 4, "ix1micro cfg")) {
                  printk(KERN_WARNING
                    "HiSax: %s config port %x-%x already in use\n",
                         CardType[card->typ],
                         cs->hw.ix1.cfg_reg,
                         cs->hw.ix1.cfg_reg + 4);
                  return (0);
            }
      }
      printk(KERN_INFO "HiSax: %s config irq:%d io:0x%X\n",
            CardType[cs->typ], cs->irq, cs->hw.ix1.cfg_reg);
      setup_isac(cs);
      cs->readisac = &ReadISAC;
      cs->writeisac = &WriteISAC;
      cs->readisacfifo = &ReadISACfifo;
      cs->writeisacfifo = &WriteISACfifo;
      cs->BC_Read_Reg = &ReadHSCX;
      cs->BC_Write_Reg = &WriteHSCX;
      cs->BC_Send_Data = &hscx_fill_fifo;
      cs->cardmsg = &ix1_card_msg;
      cs->irq_func = &ix1micro_interrupt;
      ISACVersion(cs, "ix1-Micro:");
      if (HscxVersion(cs, "ix1-Micro:")) {
            printk(KERN_WARNING
                "ix1-Micro: wrong HSCX versions check IO address\n");
            release_io_ix1micro(cs);
            return (0);
      }
      return (1);
}

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