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teleint.c

/* $Id: teleint.c,v 1.16.2.5 2004/01/19 15:31:50 keil Exp $
 *
 * low level stuff for TeleInt isdn cards
 *
 * Author       Karsten Keil
 * Copyright    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.
 *
 */

#include <linux/init.h>
#include "hisax.h"
#include "isac.h"
#include "hfc_2bs0.h"
#include "isdnl1.h"

extern const char *CardType[];

static const char *TeleInt_revision = "$Revision: 1.16.2.5 $";

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

static inline u_char
readreg(unsigned int ale, unsigned int adr, u_char off)
{
      register u_char ret;
      int max_delay = 2000;

      byteout(ale, off);
      ret = HFC_BUSY & bytein(ale);
      while (ret && --max_delay)
            ret = HFC_BUSY & bytein(ale);
      if (!max_delay) {
            printk(KERN_WARNING "TeleInt Busy not inactive\n");
            return (0);
      }
      ret = bytein(adr);
      return (ret);
}

static inline void
readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
{
      register u_char ret;
      register int max_delay = 20000;
      register int i;
      
      byteout(ale, off);
      for (i = 0; i<size; i++) {
            ret = HFC_BUSY & bytein(ale);
            while (ret && --max_delay)
                  ret = HFC_BUSY & bytein(ale);
            if (!max_delay) {
                  printk(KERN_WARNING "TeleInt Busy not inactive\n");
                  return;
            }
            data[i] = bytein(adr);
      }
}


static inline void
writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
{
      register u_char ret;
      int max_delay = 2000;

      byteout(ale, off);
      ret = HFC_BUSY & bytein(ale);
      while (ret && --max_delay)
            ret = HFC_BUSY & bytein(ale);
      if (!max_delay) {
            printk(KERN_WARNING "TeleInt Busy not inactive\n");
            return;
      }
      byteout(adr, data);
}

static inline void
writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
{
      register u_char ret;
      register int max_delay = 20000;
      register int i;
      
      byteout(ale, off);
      for (i = 0; i<size; i++) {
            ret = HFC_BUSY & bytein(ale);
            while (ret && --max_delay)
                  ret = HFC_BUSY & bytein(ale);
            if (!max_delay) {
                  printk(KERN_WARNING "TeleInt Busy not inactive\n");
                  return;
            }
            byteout(adr, data[i]);
      }
}

/* Interface functions */

static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
      cs->hw.hfc.cip = offset;
      return (readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset));
}

static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
      cs->hw.hfc.cip = offset;
      writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset, value);
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      cs->hw.hfc.cip = 0;
      readfifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      cs->hw.hfc.cip = 0;
      writefifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
}

static u_char
ReadHFC(struct IsdnCardState *cs, int data, u_char reg)
{
      register u_char ret;

      if (data) {
            cs->hw.hfc.cip = reg;
            byteout(cs->hw.hfc.addr | 1, reg);
            ret = bytein(cs->hw.hfc.addr);
            if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
                  debugl1(cs, "hfc RD %02x %02x", reg, ret);
      } else
            ret = bytein(cs->hw.hfc.addr | 1);
      return (ret);
}

static void
WriteHFC(struct IsdnCardState *cs, int data, u_char reg, u_char value)
{
      byteout(cs->hw.hfc.addr | 1, reg);
      cs->hw.hfc.cip = reg;
      if (data)
            byteout(cs->hw.hfc.addr, value);
      if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
            debugl1(cs, "hfc W%c %02x %02x", data ? 'D' : 'C', reg, value);
}

static irqreturn_t
TeleInt_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.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
      Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0xFF);
      writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0x0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
TeleInt_Timer(struct IsdnCardState *cs)
{
      int stat = 0;
      u_long flags;
      
      spin_lock_irqsave(&cs->lock, flags);
      if (cs->bcs[0].mode) {
            stat |= 1;
            main_irq_hfc(&cs->bcs[0]);
      }
      if (cs->bcs[1].mode) {
            stat |= 2;
            main_irq_hfc(&cs->bcs[1]);
      }
      spin_unlock_irqrestore(&cs->lock, flags);
      stat = HZ/100;
      if (!stat)
            stat = 1;
      cs->hw.hfc.timer.expires = jiffies + stat;
      add_timer(&cs->hw.hfc.timer);
}

static void
release_io_TeleInt(struct IsdnCardState *cs)
{
      del_timer(&cs->hw.hfc.timer);
      releasehfc(cs);
      if (cs->hw.hfc.addr)
            release_region(cs->hw.hfc.addr, 2);
}

static void
reset_TeleInt(struct IsdnCardState *cs)
{
      printk(KERN_INFO "TeleInt: resetting card\n");
      cs->hw.hfc.cirm |= HFC_RESET;
      byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);  /* Reset On */
      mdelay(10);
      cs->hw.hfc.cirm &= ~HFC_RESET;
      byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);  /* Reset Off */
      mdelay(10);
}

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

      switch (mt) {
            case CARD_RESET:
                  spin_lock_irqsave(&cs->lock, flags);
                  reset_TeleInt(cs);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_RELEASE:
                  release_io_TeleInt(cs);
                  return(0);
            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  reset_TeleInt(cs);
                  inithfc(cs);
                  clear_pending_isac_ints(cs);
                  initisac(cs);
                  /* Reenable all IRQ */
                  cs->writeisac(cs, ISAC_MASK, 0);
                  cs->writeisac(cs, ISAC_CMDR, 0x41);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  delay = HZ/100;
                  if (!delay)
                        delay = 1;
                  cs->hw.hfc.timer.expires = jiffies + delay;
                  add_timer(&cs->hw.hfc.timer);
                  return(0);
            case CARD_TEST:
                  return(0);
      }
      return(0);
}

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

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

      cs->hw.hfc.addr = card->para[1] & 0x3fe;
      cs->irq = card->para[0];
      cs->hw.hfc.cirm = HFC_CIRM;
      cs->hw.hfc.isac_spcr = 0x00;
      cs->hw.hfc.cip = 0;
      cs->hw.hfc.ctmt = HFC_CTMT | HFC_CLTIMER;
      cs->bcs[0].hw.hfc.send = NULL;
      cs->bcs[1].hw.hfc.send = NULL;
      cs->hw.hfc.fifosize = 7 * 1024 + 512;
      cs->hw.hfc.timer.function = (void *) TeleInt_Timer;
      cs->hw.hfc.timer.data = (long) cs;
      init_timer(&cs->hw.hfc.timer);
      if (!request_region(cs->hw.hfc.addr, 2, "TeleInt isdn")) {
            printk(KERN_WARNING
                   "HiSax: %s config port %x-%x already in use\n",
                   CardType[card->typ],
                   cs->hw.hfc.addr,
                   cs->hw.hfc.addr + 2);
            return (0);
      }
      /* HW IO = IO */
      byteout(cs->hw.hfc.addr, cs->hw.hfc.addr & 0xff);
      byteout(cs->hw.hfc.addr | 1, ((cs->hw.hfc.addr & 0x300) >> 8) | 0x54);
      switch (cs->irq) {
            case 3:
                  cs->hw.hfc.cirm |= HFC_INTA;
                  break;
            case 4:
                  cs->hw.hfc.cirm |= HFC_INTB;
                  break;
            case 5:
                  cs->hw.hfc.cirm |= HFC_INTC;
                  break;
            case 7:
                  cs->hw.hfc.cirm |= HFC_INTD;
                  break;
            case 10:
                  cs->hw.hfc.cirm |= HFC_INTE;
                  break;
            case 11:
                  cs->hw.hfc.cirm |= HFC_INTF;
                  break;
            default:
                  printk(KERN_WARNING "TeleInt: wrong IRQ\n");
                  release_io_TeleInt(cs);
                  return (0);
      }
      byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);
      byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.ctmt);

      printk(KERN_INFO "TeleInt: defined at 0x%x IRQ %d\n",
            cs->hw.hfc.addr, cs->irq);

      setup_isac(cs);
      cs->readisac = &ReadISAC;
      cs->writeisac = &WriteISAC;
      cs->readisacfifo = &ReadISACfifo;
      cs->writeisacfifo = &WriteISACfifo;
      cs->BC_Read_Reg = &ReadHFC;
      cs->BC_Write_Reg = &WriteHFC;
      cs->cardmsg = &TeleInt_card_msg;
      cs->irq_func = &TeleInt_interrupt;
      ISACVersion(cs, "TeleInt:");
      return (1);
}

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