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gazel.c

/* $Id: gazel.c,v 2.19.2.4 2004/01/14 16:04:48 keil Exp $
 *
 * low level stuff for Gazel isdn cards
 *
 * Author       BeWan Systems
 *              based on source code from Karsten Keil
 * Copyright    by BeWan Systems
 * 
 * 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 "hscx.h"
#include "isdnl1.h"
#include "ipac.h"
#include <linux/pci.h>

extern const char *CardType[];
static const char *gazel_revision = "$Revision: 2.19.2.4 $";

#define R647      1
#define R685      2
#define R753      3
#define R742      4

#define PLX_CNTRL    0x50     /* registre de controle PLX */
#define RESET_GAZEL  0x4
#define RESET_9050   0x40000000
#define PLX_INCSR    0x4C     /* registre d'IT du 9050 */
#define INT_ISAC_EN  0x8      /* 1 = enable IT isac */
#define INT_ISAC     0x20     /* 1 = IT isac en cours */
#define INT_HSCX_EN  0x1      /* 1 = enable IT hscx */
#define INT_HSCX     0x4      /* 1 = IT hscx en cours */
#define INT_PCI_EN   0x40     /* 1 = enable IT PCI */
#define INT_IPAC_EN  0x3      /* enable IT ipac */


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

static inline u_char
readreg(unsigned int adr, u_short off)
{
      return bytein(adr + off);
}

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


static inline void
read_fifo(unsigned int adr, u_char * data, int size)
{
      insb(adr, data, size);
}

static void
write_fifo(unsigned int adr, u_char * data, int size)
{
      outsb(adr, data, size);
}

static inline u_char
readreg_ipac(unsigned int adr, u_short off)
{
      register u_char ret;

      byteout(adr, off);
      ret = bytein(adr + 4);
      return ret;
}

static inline void
writereg_ipac(unsigned int adr, u_short off, u_char data)
{
      byteout(adr, off);
      byteout(adr + 4, data);
}


static inline void
read_fifo_ipac(unsigned int adr, u_short off, u_char * data, int size)
{
      byteout(adr, off);
      insb(adr + 4, data, size);
}

static void
write_fifo_ipac(unsigned int adr, u_short off, u_char * data, int size)
{
      byteout(adr, off);
      outsb(adr + 4, data, size);
}

/* Interface functions */

static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
      u_short off2 = offset;

      switch (cs->subtyp) {
            case R647:
                  off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
            case R685:
                  return (readreg(cs->hw.gazel.isac, off2));
            case R753:
            case R742:
                  return (readreg_ipac(cs->hw.gazel.ipac, 0x80 + off2));
      }
      return 0;
}

static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
      u_short off2 = offset;

      switch (cs->subtyp) {
            case R647:
                  off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
            case R685:
                  writereg(cs->hw.gazel.isac, off2, value);
                  break;
            case R753:
            case R742:
                  writereg_ipac(cs->hw.gazel.ipac, 0x80 + off2, value);
                  break;
      }
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      switch (cs->subtyp) {
            case R647:
            case R685:
                  read_fifo(cs->hw.gazel.isacfifo, data, size);
                  break;
            case R753:
            case R742:
                  read_fifo_ipac(cs->hw.gazel.ipac, 0x80, data, size);
                  break;
      }
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      switch (cs->subtyp) {
            case R647:
            case R685:
                  write_fifo(cs->hw.gazel.isacfifo, data, size);
                  break;
            case R753:
            case R742:
                  write_fifo_ipac(cs->hw.gazel.ipac, 0x80, data, size);
                  break;
      }
}

static void
ReadHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
{
      switch (cs->subtyp) {
            case R647:
            case R685:
                  read_fifo(cs->hw.gazel.hscxfifo[hscx], data, size);
                  break;
            case R753:
            case R742:
                  read_fifo_ipac(cs->hw.gazel.ipac, hscx * 0x40, data, size);
                  break;
      }
}

static void
WriteHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
{
      switch (cs->subtyp) {
            case R647:
            case R685:
                  write_fifo(cs->hw.gazel.hscxfifo[hscx], data, size);
                  break;
            case R753:
            case R742:
                  write_fifo_ipac(cs->hw.gazel.ipac, hscx * 0x40, data, size);
                  break;
      }
}

static u_char
ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
{
      u_short off2 = offset;

      switch (cs->subtyp) {
            case R647:
                  off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
            case R685:
                  return (readreg(cs->hw.gazel.hscx[hscx], off2));
            case R753:
            case R742:
                  return (readreg_ipac(cs->hw.gazel.ipac, hscx * 0x40 + off2));
      }
      return 0;
}

static void
WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
{
      u_short off2 = offset;

      switch (cs->subtyp) {
            case R647:
                  off2 = ((off2 << 8 & 0xf000) | (off2 & 0xf));
            case R685:
                  writereg(cs->hw.gazel.hscx[hscx], off2, value);
                  break;
            case R753:
            case R742:
                  writereg_ipac(cs->hw.gazel.ipac, hscx * 0x40 + off2, value);
                  break;
      }
}

/*
 * fast interrupt HSCX stuff goes here
 */

#define READHSCX(cs, nr, reg) ReadHSCX(cs, nr, reg)
#define WRITEHSCX(cs, nr, reg, data) WriteHSCX(cs, nr, reg, data)
#define READHSCXFIFO(cs, nr, ptr, cnt) ReadHSCXfifo(cs, nr, ptr, cnt)
#define WRITEHSCXFIFO(cs, nr, ptr, cnt) WriteHSCXfifo(cs, nr, ptr, cnt)

#include "hscx_irq.c"

static irqreturn_t
gazel_interrupt(int intno, void *dev_id)
{
#define MAXCOUNT 5
      struct IsdnCardState *cs = dev_id;
      u_char valisac, valhscx;
      int count = 0;
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
      do {
            valhscx = ReadHSCX(cs, 1, HSCX_ISTA);
            if (valhscx)
                  hscx_int_main(cs, valhscx);
            valisac = ReadISAC(cs, ISAC_ISTA);
            if (valisac)
                  isac_interrupt(cs, valisac);
            count++;
      } while ((valhscx || valisac) && (count < MAXCOUNT));

      WriteHSCX(cs, 0, HSCX_MASK, 0xFF);
      WriteHSCX(cs, 1, HSCX_MASK, 0xFF);
      WriteISAC(cs, ISAC_MASK, 0xFF);
      WriteISAC(cs, ISAC_MASK, 0x0);
      WriteHSCX(cs, 0, HSCX_MASK, 0x0);
      WriteHSCX(cs, 1, HSCX_MASK, 0x0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}


static irqreturn_t
gazel_interrupt_ipac(int intno, void *dev_id)
{
      struct IsdnCardState *cs = dev_id;
      u_char ista, val;
      int count = 0;
      u_long flags;
      
      spin_lock_irqsave(&cs->lock, flags);
      ista = ReadISAC(cs, IPAC_ISTA - 0x80);
      do {
            if (ista & 0x0f) {
                  val = ReadHSCX(cs, 1, HSCX_ISTA);
                  if (ista & 0x01)
                        val |= 0x01;
                  if (ista & 0x04)
                        val |= 0x02;
                  if (ista & 0x08)
                        val |= 0x04;
                  if (val) {
                        hscx_int_main(cs, val);
                  }
            }
            if (ista & 0x20) {
                  val = 0xfe & ReadISAC(cs, ISAC_ISTA);
                  if (val) {
                        isac_interrupt(cs, val);
                  }
            }
            if (ista & 0x10) {
                  val = 0x01;
                  isac_interrupt(cs, val);
            }
            ista = ReadISAC(cs, IPAC_ISTA - 0x80);
            count++;
      }
      while ((ista & 0x3f) && (count < MAXCOUNT));

      WriteISAC(cs, IPAC_MASK - 0x80, 0xFF);
      WriteISAC(cs, IPAC_MASK - 0x80, 0xC0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
release_io_gazel(struct IsdnCardState *cs)
{
      unsigned int i;

      switch (cs->subtyp) {
            case R647:
                  for (i = 0x0000; i < 0xC000; i += 0x1000)
                        release_region(i + cs->hw.gazel.hscx[0], 16);
                  release_region(0xC000 + cs->hw.gazel.hscx[0], 1);
                  break;

            case R685:
                  release_region(cs->hw.gazel.hscx[0], 0x100);
                  release_region(cs->hw.gazel.cfg_reg, 0x80);
                  break;

            case R753:
                  release_region(cs->hw.gazel.ipac, 0x8);
                  release_region(cs->hw.gazel.cfg_reg, 0x80);
                  break;

            case R742:
                  release_region(cs->hw.gazel.ipac, 8);
                  break;
      }
}

static int
reset_gazel(struct IsdnCardState *cs)
{
      unsigned long plxcntrl, addr = cs->hw.gazel.cfg_reg;

      switch (cs->subtyp) {
            case R647:
                  writereg(addr, 0, 0);
                  HZDELAY(10);
                  writereg(addr, 0, 1);
                  HZDELAY(2);
                  break;
            case R685:
                  plxcntrl = inl(addr + PLX_CNTRL);
                  plxcntrl |= (RESET_9050 + RESET_GAZEL);
                  outl(plxcntrl, addr + PLX_CNTRL);
                  plxcntrl &= ~(RESET_9050 + RESET_GAZEL);
                  HZDELAY(4);
                  outl(plxcntrl, addr + PLX_CNTRL);
                  HZDELAY(10);
                  outb(INT_ISAC_EN + INT_HSCX_EN + INT_PCI_EN, addr + PLX_INCSR);
                  break;
            case R753:
                  plxcntrl = inl(addr + PLX_CNTRL);
                  plxcntrl |= (RESET_9050 + RESET_GAZEL);
                  outl(plxcntrl, addr + PLX_CNTRL);
                  plxcntrl &= ~(RESET_9050 + RESET_GAZEL);
                  WriteISAC(cs, IPAC_POTA2 - 0x80, 0x20);
                  HZDELAY(4);
                  outl(plxcntrl, addr + PLX_CNTRL);
                  HZDELAY(10);
                  WriteISAC(cs, IPAC_POTA2 - 0x80, 0x00);
                  WriteISAC(cs, IPAC_ACFG - 0x80, 0xff);
                  WriteISAC(cs, IPAC_AOE - 0x80, 0x0);
                  WriteISAC(cs, IPAC_MASK - 0x80, 0xff);
                  WriteISAC(cs, IPAC_CONF - 0x80, 0x1);
                  outb(INT_IPAC_EN + INT_PCI_EN, addr + PLX_INCSR);
                  WriteISAC(cs, IPAC_MASK - 0x80, 0xc0);
                  break;
            case R742:
                  WriteISAC(cs, IPAC_POTA2 - 0x80, 0x20);
                  HZDELAY(4);
                  WriteISAC(cs, IPAC_POTA2 - 0x80, 0x00);
                  WriteISAC(cs, IPAC_ACFG - 0x80, 0xff);
                  WriteISAC(cs, IPAC_AOE - 0x80, 0x0);
                  WriteISAC(cs, IPAC_MASK - 0x80, 0xff);
                  WriteISAC(cs, IPAC_CONF - 0x80, 0x1);
                  WriteISAC(cs, IPAC_MASK - 0x80, 0xc0);
                  break;
      }
      return (0);
}

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

      switch (mt) {
            case CARD_RESET:
                  spin_lock_irqsave(&cs->lock, flags);
                  reset_gazel(cs);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return (0);
            case CARD_RELEASE:
                  release_io_gazel(cs);
                  return (0);
            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  inithscxisac(cs, 1);
                  if ((cs->subtyp==R647)||(cs->subtyp==R685)) {
                        int i;
                        for (i=0;i<(2+MAX_WAITING_CALLS);i++) {
                              cs->bcs[i].hw.hscx.tsaxr0 = 0x1f;
                              cs->bcs[i].hw.hscx.tsaxr1 = 0x23;
                        }
                  }
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return (0);
            case CARD_TEST:
                  return (0);
      }
      return (0);
}

static int
reserve_regions(struct IsdnCard *card, struct IsdnCardState *cs)
{
      unsigned int i, j, base = 0, adr = 0, len = 0;

      switch (cs->subtyp) {
            case R647:
                  base = cs->hw.gazel.hscx[0];
                  if (!request_region(adr = (0xC000 + base), len = 1, "gazel"))
                        goto error;
                  for (i = 0x0000; i < 0xC000; i += 0x1000) {
                        if (!request_region(adr = (i + base), len = 16, "gazel"))
                              goto error;
                  }
                  if (i != 0xC000) {
                        for (j = 0; j < i; j+= 0x1000)
                              release_region(j + base, 16);
                        release_region(0xC000 + base, 1);
                        goto error;
                  }
                  break;

            case R685:
                  if (!request_region(adr = cs->hw.gazel.hscx[0], len = 0x100, "gazel"))
                        goto error;
                  if (!request_region(adr = cs->hw.gazel.cfg_reg, len = 0x80, "gazel")) {
                        release_region(cs->hw.gazel.hscx[0],0x100);
                        goto error;
                  }
                  break;

            case R753:
                  if (!request_region(adr = cs->hw.gazel.ipac, len = 0x8, "gazel"))
                        goto error;
                  if (!request_region(adr = cs->hw.gazel.cfg_reg, len = 0x80, "gazel")) {
                        release_region(cs->hw.gazel.ipac, 8);
                        goto error;
                  }
                  break;

            case R742:
                  if (!request_region(adr = cs->hw.gazel.ipac, len = 0x8, "gazel"))
                        goto error;
                  break;
      }

      return 0;

      error:
      printk(KERN_WARNING "Gazel: %s io ports 0x%x-0x%x already in use\n",
             CardType[cs->typ], adr, adr + len);
      return 1;
}

static int __devinit
setup_gazelisa(struct IsdnCard *card, struct IsdnCardState *cs)
{
      printk(KERN_INFO "Gazel: ISA PnP card automatic recognition\n");
      // we got an irq parameter, assume it is an ISA card
      // R742 decodes address even in not started...
      // R647 returns FF if not present or not started
      // eventually needs improvment
      if (readreg_ipac(card->para[1], IPAC_ID) == 1)
            cs->subtyp = R742;
      else
            cs->subtyp = R647;

      setup_isac(cs);
      cs->hw.gazel.cfg_reg = card->para[1] + 0xC000;
      cs->hw.gazel.ipac = card->para[1];
      cs->hw.gazel.isac = card->para[1] + 0x8000;
      cs->hw.gazel.hscx[0] = card->para[1];
      cs->hw.gazel.hscx[1] = card->para[1] + 0x4000;
      cs->irq = card->para[0];
      cs->hw.gazel.isacfifo = cs->hw.gazel.isac;
      cs->hw.gazel.hscxfifo[0] = cs->hw.gazel.hscx[0];
      cs->hw.gazel.hscxfifo[1] = cs->hw.gazel.hscx[1];

      switch (cs->subtyp) {
            case R647:
                  printk(KERN_INFO "Gazel: Card ISA R647/R648 found\n");
                  cs->dc.isac.adf2 = 0x87;
                  printk(KERN_INFO
                        "Gazel: config irq:%d isac:0x%X  cfg:0x%X\n",
                        cs->irq, cs->hw.gazel.isac, cs->hw.gazel.cfg_reg);
                  printk(KERN_INFO
                        "Gazel: hscx A:0x%X  hscx B:0x%X\n",
                        cs->hw.gazel.hscx[0], cs->hw.gazel.hscx[1]);

                  break;
            case R742:
                  printk(KERN_INFO "Gazel: Card ISA R742 found\n");
                  test_and_set_bit(HW_IPAC, &cs->HW_Flags);
                  printk(KERN_INFO
                         "Gazel: config irq:%d ipac:0x%X\n",
                         cs->irq, cs->hw.gazel.ipac);
                  break;
      }

      return (0);
}

#ifdef CONFIG_PCI_LEGACY
static struct pci_dev *dev_tel __devinitdata = NULL;

static int __devinit
setup_gazelpci(struct IsdnCardState *cs)
{
      u_int pci_ioaddr0 = 0, pci_ioaddr1 = 0;
      u_char pci_irq = 0, found;
      u_int nbseek, seekcard;

      printk(KERN_WARNING "Gazel: PCI card automatic recognition\n");

      found = 0;
      seekcard = PCI_DEVICE_ID_PLX_R685;
      for (nbseek = 0; nbseek < 4; nbseek++) {
            if ((dev_tel = pci_find_device(PCI_VENDOR_ID_PLX,
                              seekcard, dev_tel))) {
                  if (pci_enable_device(dev_tel))
                        return 1;
                  pci_irq = dev_tel->irq;
                  pci_ioaddr0 = pci_resource_start(dev_tel, 1);
                  pci_ioaddr1 = pci_resource_start(dev_tel, 2);
                  found = 1;
            }
            if (found)
                  break;
            else {
                  switch (seekcard) {
                        case PCI_DEVICE_ID_PLX_R685:
                              seekcard = PCI_DEVICE_ID_PLX_R753;
                              break;
                        case PCI_DEVICE_ID_PLX_R753:
                              seekcard = PCI_DEVICE_ID_PLX_DJINN_ITOO;
                              break;
                        case PCI_DEVICE_ID_PLX_DJINN_ITOO:
                              seekcard = PCI_DEVICE_ID_PLX_OLITEC;
                              break;
                  }
            }
      }
      if (!found) {
            printk(KERN_WARNING "Gazel: No PCI card found\n");
            return (1);
      }
      if (!pci_irq) {
            printk(KERN_WARNING "Gazel: No IRQ for PCI card found\n");
            return 1;
      }
      cs->hw.gazel.pciaddr[0] = pci_ioaddr0;
      cs->hw.gazel.pciaddr[1] = pci_ioaddr1;
      setup_isac(cs);
      pci_ioaddr1 &= 0xfffe;
      cs->hw.gazel.cfg_reg = pci_ioaddr0 & 0xfffe;
      cs->hw.gazel.ipac = pci_ioaddr1;
      cs->hw.gazel.isac = pci_ioaddr1 + 0x80;
      cs->hw.gazel.hscx[0] = pci_ioaddr1;
      cs->hw.gazel.hscx[1] = pci_ioaddr1 + 0x40;
      cs->hw.gazel.isacfifo = cs->hw.gazel.isac;
      cs->hw.gazel.hscxfifo[0] = cs->hw.gazel.hscx[0];
      cs->hw.gazel.hscxfifo[1] = cs->hw.gazel.hscx[1];
      cs->irq = pci_irq;
      cs->irq_flags |= IRQF_SHARED;

      switch (seekcard) {
            case PCI_DEVICE_ID_PLX_R685:
                  printk(KERN_INFO "Gazel: Card PCI R685 found\n");
                  cs->subtyp = R685;
                  cs->dc.isac.adf2 = 0x87;
                  printk(KERN_INFO
                      "Gazel: config irq:%d isac:0x%X  cfg:0x%X\n",
                  cs->irq, cs->hw.gazel.isac, cs->hw.gazel.cfg_reg);
                  printk(KERN_INFO
                         "Gazel: hscx A:0x%X  hscx B:0x%X\n",
                       cs->hw.gazel.hscx[0], cs->hw.gazel.hscx[1]);
                  break;
            case PCI_DEVICE_ID_PLX_R753:
            case PCI_DEVICE_ID_PLX_DJINN_ITOO:
            case PCI_DEVICE_ID_PLX_OLITEC:
                  printk(KERN_INFO "Gazel: Card PCI R753 found\n");
                  cs->subtyp = R753;
                  test_and_set_bit(HW_IPAC, &cs->HW_Flags);
                  printk(KERN_INFO
                      "Gazel: config irq:%d ipac:0x%X  cfg:0x%X\n",
                  cs->irq, cs->hw.gazel.ipac, cs->hw.gazel.cfg_reg);
                  break;
      }

      return (0);
}
#endif /* CONFIG_PCI_LEGACY */

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

      strcpy(tmp, gazel_revision);
      printk(KERN_INFO "Gazel: Driver Revision %s\n", HiSax_getrev(tmp));

      if (cs->typ != ISDN_CTYPE_GAZEL)
            return (0);

      if (card->para[0]) {
            if (setup_gazelisa(card, cs))
                  return (0);
      } else {

#ifdef CONFIG_PCI_LEGACY
            if (setup_gazelpci(cs))
                  return (0);
#else
            printk(KERN_WARNING "Gazel: Card PCI requested and NO_PCI_BIOS, unable to config\n");
            return (0);
#endif                        /* CONFIG_PCI */
      }

      if (reserve_regions(card, cs)) {
            return (0);
      }
      if (reset_gazel(cs)) {
            printk(KERN_WARNING "Gazel: wrong IRQ\n");
            release_io_gazel(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 = &Gazel_card_msg;

      switch (cs->subtyp) {
            case R647:
            case R685:
                  cs->irq_func = &gazel_interrupt;
                  ISACVersion(cs, "Gazel:");
                  if (HscxVersion(cs, "Gazel:")) {
                        printk(KERN_WARNING
                               "Gazel: wrong HSCX versions check IO address\n");
                        release_io_gazel(cs);
                        return (0);
                  }
                  break;
            case R742:
            case R753:
                  cs->irq_func = &gazel_interrupt_ipac;
                  val = ReadISAC(cs, IPAC_ID - 0x80);
                  printk(KERN_INFO "Gazel: IPAC version %x\n", val);
                  break;
      }

      return (1);
}

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