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saphir.c

/* $Id: saphir.c,v 1.10.2.4 2004/01/13 23:48:39 keil Exp $
 *
 * low level stuff for HST Saphir 1
 *
 * 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.
 *
 * Thanks to    HST High Soft Tech GmbH
 *
 */

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

extern const char *CardType[];
static char *saphir_rev = "$Revision: 1.10.2.4 $";

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

#define ISAC_DATA 0
#define HSCX_DATA 1
#define ADDRESS_REG     2
#define IRQ_REG         3
#define SPARE_REG 4
#define RESET_REG 5

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.saphir.ale, cs->hw.saphir.isac, offset));
}

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

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

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

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

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

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

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

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

#include "hscx_irq.c"

static irqreturn_t
saphir_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.saphir.ale, cs->hw.saphir.hscx, HSCX_ISTA + 0x40);
      Start_HSCX:
      if (val)
            hscx_int_main(cs, val);
      val = readreg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_ISTA);
      Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = readreg(cs->hw.saphir.ale, cs->hw.saphir.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.saphir.ale, cs->hw.saphir.isac, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      /* Watchdog */
      if (cs->hw.saphir.timer.function) 
            mod_timer(&cs->hw.saphir.timer, jiffies+1*HZ);
      else
            printk(KERN_WARNING "saphir: Spurious timer!\n");
      writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK, 0xFF);
      writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK + 0x40, 0xFF);
      writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_MASK, 0xFF);
      writereg(cs->hw.saphir.ale, cs->hw.saphir.isac, ISAC_MASK, 0);
      writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK, 0);
      writereg(cs->hw.saphir.ale, cs->hw.saphir.hscx, HSCX_MASK + 0x40, 0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
SaphirWatchDog(struct IsdnCardState *cs)
{
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
        /* 5 sec WatchDog, so read at least every 4 sec */
      cs->readisac(cs, ISAC_RBCH);
      spin_unlock_irqrestore(&cs->lock, flags);
      mod_timer(&cs->hw.saphir.timer, jiffies+1*HZ);
}

static void
release_io_saphir(struct IsdnCardState *cs)
{
      byteout(cs->hw.saphir.cfg_reg + IRQ_REG, 0xff);
      del_timer(&cs->hw.saphir.timer);
      cs->hw.saphir.timer.function = NULL;
      if (cs->hw.saphir.cfg_reg)
            release_region(cs->hw.saphir.cfg_reg, 6);
}

static int
saphir_reset(struct IsdnCardState *cs)
{
      u_char irq_val;

      switch(cs->irq) {
            case 5: irq_val = 0;
                  break;
            case 3: irq_val = 1;
                  break;
            case 11:
                  irq_val = 2;
                  break;
            case 12:
                  irq_val = 3;
                  break;
            case 15:
                  irq_val = 4;
                  break;
            default:
                  printk(KERN_WARNING "HiSax: saphir wrong IRQ %d\n",
                        cs->irq);
                  return (1);
      }
      byteout(cs->hw.saphir.cfg_reg + IRQ_REG, irq_val);
      byteout(cs->hw.saphir.cfg_reg + RESET_REG, 1);
      mdelay(10);
      byteout(cs->hw.saphir.cfg_reg + RESET_REG, 0);
      mdelay(10);
      byteout(cs->hw.saphir.cfg_reg + IRQ_REG, irq_val);
      byteout(cs->hw.saphir.cfg_reg + SPARE_REG, 0x02);
      return (0);
}

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

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


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

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

      /* IO-Ports */
      cs->hw.saphir.cfg_reg = card->para[1];
      cs->hw.saphir.isac = card->para[1] + ISAC_DATA;
      cs->hw.saphir.hscx = card->para[1] + HSCX_DATA;
      cs->hw.saphir.ale = card->para[1] + ADDRESS_REG;
      cs->irq = card->para[0];
      if (!request_region(cs->hw.saphir.cfg_reg, 6, "saphir")) {
            printk(KERN_WARNING
                  "HiSax: %s config port %x-%x already in use\n",
                  CardType[card->typ],
                  cs->hw.saphir.cfg_reg,
                  cs->hw.saphir.cfg_reg + 5);
            return (0);
      }

      printk(KERN_INFO "HiSax: %s config irq:%d io:0x%X\n",
            CardType[cs->typ], cs->irq, cs->hw.saphir.cfg_reg);

      setup_isac(cs);
      cs->hw.saphir.timer.function = (void *) SaphirWatchDog;
      cs->hw.saphir.timer.data = (long) cs;
      init_timer(&cs->hw.saphir.timer);
      cs->hw.saphir.timer.expires = jiffies + 4*HZ;
      add_timer(&cs->hw.saphir.timer);
      if (saphir_reset(cs)) {
            release_io_saphir(cs);
            return (0);
      }
      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 = &saphir_card_msg;
      cs->irq_func = &saphir_interrupt;
      ISACVersion(cs, "saphir:");
      if (HscxVersion(cs, "saphir:")) {
            printk(KERN_WARNING
                "saphir: wrong HSCX versions check IO address\n");
            release_io_saphir(cs);
            return (0);
      }
      return (1);
}

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