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niccy.c

/* $Id: niccy.c,v 1.21.2.4 2004/01/13 23:48:39 keil Exp $
 *
 * low level stuff for Dr. Neuhaus NICCY PnP and NICCY PCI and
 * compatible (SAGEM cybermodem)
 *
 * 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 Dr. Neuhaus and SAGEM for information
 *
 */

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

extern const char *CardType[];
static const char *niccy_revision = "$Revision: 1.21.2.4 $";

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

#define ISAC_PCI_DATA   0
#define HSCX_PCI_DATA   1
#define ISAC_PCI_ADDR   2
#define HSCX_PCI_ADDR   3
#define ISAC_PNP  0
#define HSCX_PNP  1

/* SUB Types */
#define NICCY_PNP 1
#define NICCY_PCI 2

/* PCI stuff */
#define PCI_IRQ_CTRL_REG      0x38
#define PCI_IRQ_ENABLE        0x1f00
#define PCI_IRQ_DISABLE       0xff0000
#define PCI_IRQ_ASSERT        0x800000

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.niccy.isac_ale, cs->hw.niccy.isac, offset);
}

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

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

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

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

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

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

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

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

#include "hscx_irq.c"

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

      spin_lock_irqsave(&cs->lock, flags);
      if (cs->subtyp == NICCY_PCI) {
            int ival;
            ival = inl(cs->hw.niccy.cfg_reg + PCI_IRQ_CTRL_REG);
            if (!(ival & PCI_IRQ_ASSERT)) {     /* IRQ not for us (shared) */
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return IRQ_NONE;
            }
            outl(ival, cs->hw.niccy.cfg_reg + PCI_IRQ_CTRL_REG);
      }
      val = readreg(cs->hw.niccy.hscx_ale, cs->hw.niccy.hscx,
                  HSCX_ISTA + 0x40);
Start_HSCX:
      if (val)
            hscx_int_main(cs, val);
      val = readreg(cs->hw.niccy.isac_ale, cs->hw.niccy.isac, ISAC_ISTA);
Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = readreg(cs->hw.niccy.hscx_ale, cs->hw.niccy.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.niccy.isac_ale, cs->hw.niccy.isac, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      writereg(cs->hw.niccy.hscx_ale, cs->hw.niccy.hscx, HSCX_MASK, 0xFF);
      writereg(cs->hw.niccy.hscx_ale, cs->hw.niccy.hscx, HSCX_MASK + 0x40,
             0xFF);
      writereg(cs->hw.niccy.isac_ale, cs->hw.niccy.isac, ISAC_MASK, 0xFF);
      writereg(cs->hw.niccy.isac_ale, cs->hw.niccy.isac, ISAC_MASK, 0);
      writereg(cs->hw.niccy.hscx_ale, cs->hw.niccy.hscx, HSCX_MASK, 0);
      writereg(cs->hw.niccy.hscx_ale, cs->hw.niccy.hscx, HSCX_MASK + 0x40,0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void release_io_niccy(struct IsdnCardState *cs)
{
      if (cs->subtyp == NICCY_PCI) {
            int val;

            val = inl(cs->hw.niccy.cfg_reg + PCI_IRQ_CTRL_REG);
            val &= PCI_IRQ_DISABLE;
            outl(val, cs->hw.niccy.cfg_reg + PCI_IRQ_CTRL_REG);
            release_region(cs->hw.niccy.cfg_reg, 0x40);
            release_region(cs->hw.niccy.isac, 4);
      } else {
            release_region(cs->hw.niccy.isac, 2);
            release_region(cs->hw.niccy.isac_ale, 2);
      }
}

static void niccy_reset(struct IsdnCardState *cs)
{
      if (cs->subtyp == NICCY_PCI) {
            int val;

            val = inl(cs->hw.niccy.cfg_reg + PCI_IRQ_CTRL_REG);
            val |= PCI_IRQ_ENABLE;
            outl(val, cs->hw.niccy.cfg_reg + PCI_IRQ_CTRL_REG);
      }
      inithscxisac(cs, 3);
}

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

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

#ifdef __ISAPNP__
static struct pnp_card *pnp_c __devinitdata = NULL;
#endif

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

      strcpy(tmp, niccy_revision);
      printk(KERN_INFO "HiSax: Niccy driver Rev. %s\n", HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_NICCY)
            return 0;
#ifdef __ISAPNP__
      if (!card->para[1] && isapnp_present()) {
            struct pnp_dev *pnp_d = NULL;
            int err;

            pnp_c = pnp_find_card(ISAPNP_VENDOR('S', 'D', 'A'),
                        ISAPNP_FUNCTION(0x0150), pnp_c);
            if (pnp_c) {
                  pnp_d = pnp_find_dev(pnp_c,
                              ISAPNP_VENDOR('S', 'D', 'A'),
                              ISAPNP_FUNCTION(0x0150), pnp_d);
                  if (!pnp_d) {
                        printk(KERN_ERR "NiccyPnP: PnP error card "
                              "found, no device\n");
                        return 0;
                  }
                  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[2] = pnp_port_start(pnp_d, 1);
                  card->para[0] = pnp_irq(pnp_d, 0);
                  if (!card->para[0] || !card->para[1] ||
                              !card->para[2]) {
                        printk(KERN_ERR "NiccyPnP:some resources are "
                              "missing %ld/%lx/%lx\n",
                              card->para[0], card->para[1],
                              card->para[2]);
                        pnp_disable_dev(pnp_d);
                        return 0;
                  }
            } else
                  printk(KERN_INFO "NiccyPnP: no ISAPnP card found\n");
      }
#endif
      if (card->para[1]) {
            cs->hw.niccy.isac = card->para[1] + ISAC_PNP;
            cs->hw.niccy.hscx = card->para[1] + HSCX_PNP;
            cs->hw.niccy.isac_ale = card->para[2] + ISAC_PNP;
            cs->hw.niccy.hscx_ale = card->para[2] + HSCX_PNP;
            cs->hw.niccy.cfg_reg = 0;
            cs->subtyp = NICCY_PNP;
            cs->irq = card->para[0];
            if (!request_region(cs->hw.niccy.isac, 2, "niccy data")) {
                  printk(KERN_WARNING "HiSax: %s data port %x-%x "
                        "already in use\n", CardType[card->typ],
                        cs->hw.niccy.isac, cs->hw.niccy.isac + 1);
                  return 0;
            }
            if (!request_region(cs->hw.niccy.isac_ale, 2, "niccy addr")) {
                  printk(KERN_WARNING "HiSax: %s address port %x-%x "
                        "already in use\n", CardType[card->typ],
                        cs->hw.niccy.isac_ale,
                        cs->hw.niccy.isac_ale + 1);
                  release_region(cs->hw.niccy.isac, 2);
                  return 0;
            }
      } else {
#ifdef CONFIG_PCI_LEGACY
            static struct pci_dev *niccy_dev __devinitdata;

            u_int pci_ioaddr;
            cs->subtyp = 0;
            if ((niccy_dev = pci_find_device(PCI_VENDOR_ID_SATSAGEM,
                                     PCI_DEVICE_ID_SATSAGEM_NICCY,
                                     niccy_dev))) {
                  if (pci_enable_device(niccy_dev))
                        return 0;
                  /* get IRQ */
                  if (!niccy_dev->irq) {
                        printk(KERN_WARNING
                               "Niccy: No IRQ for PCI card found\n");
                        return 0;
                  }
                  cs->irq = niccy_dev->irq;
                  cs->hw.niccy.cfg_reg = pci_resource_start(niccy_dev, 0);
                  if (!cs->hw.niccy.cfg_reg) {
                        printk(KERN_WARNING
                               "Niccy: No IO-Adr for PCI cfg found\n");
                        return 0;
                  }
                  pci_ioaddr = pci_resource_start(niccy_dev, 1);
                  if (!pci_ioaddr) {
                        printk(KERN_WARNING
                               "Niccy: No IO-Adr for PCI card found\n");
                        return 0;
                  }
                  cs->subtyp = NICCY_PCI;
            } else {
                  printk(KERN_WARNING "Niccy: No PCI card found\n");
                  return 0;
            }
            cs->irq_flags |= IRQF_SHARED;
            cs->hw.niccy.isac = pci_ioaddr + ISAC_PCI_DATA;
            cs->hw.niccy.isac_ale = pci_ioaddr + ISAC_PCI_ADDR;
            cs->hw.niccy.hscx = pci_ioaddr + HSCX_PCI_DATA;
            cs->hw.niccy.hscx_ale = pci_ioaddr + HSCX_PCI_ADDR;
            if (!request_region(cs->hw.niccy.isac, 4, "niccy")) {
                  printk(KERN_WARNING
                         "HiSax: %s data port %x-%x already in use\n",
                         CardType[card->typ],
                         cs->hw.niccy.isac, cs->hw.niccy.isac + 4);
                  return 0;
            }
            if (!request_region(cs->hw.niccy.cfg_reg, 0x40, "niccy pci")) {
                  printk(KERN_WARNING
                         "HiSax: %s pci port %x-%x already in use\n",
                         CardType[card->typ],
                         cs->hw.niccy.cfg_reg,
                         cs->hw.niccy.cfg_reg + 0x40);
                  release_region(cs->hw.niccy.isac, 4);
                  return 0;
            }
#else
            printk(KERN_WARNING "Niccy: io0 0 and NO_PCI_BIOS\n");
            printk(KERN_WARNING "Niccy: unable to config NICCY PCI\n");
            return 0;
#endif                        /* CONFIG_PCI_LEGACY */
      }
      printk(KERN_INFO "HiSax: %s %s config irq:%d data:0x%X ale:0x%X\n",
            CardType[cs->typ], (cs->subtyp == 1) ? "PnP" : "PCI",
            cs->irq, cs->hw.niccy.isac, cs->hw.niccy.isac_ale);
      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 = &niccy_card_msg;
      cs->irq_func = &niccy_interrupt;
      ISACVersion(cs, "Niccy:");
      if (HscxVersion(cs, "Niccy:")) {
            printk(KERN_WARNING "Niccy: wrong HSCX versions check IO "
                  "address\n");
            release_io_niccy(cs);
            return 0;
      }
      return 1;
}

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