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asuscom.c

/* $Id: asuscom.c,v 1.14.2.4 2004/01/13 23:48:39 keil Exp $
 *
 * low level stuff for ASUSCOM NETWORK INC. ISDNLink 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.
 *
 * Thanks to  ASUSCOM NETWORK INC. Taiwan and  Dynalink NL for information
 *
 */

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

extern const char *CardType[];

static const char *Asuscom_revision = "$Revision: 1.14.2.4 $";

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

#define ASUS_ISAC 0
#define ASUS_HSCX 1
#define ASUS_ADR  2
#define ASUS_CTRL_U7    3
#define ASUS_CTRL_POTS  5

#define ASUS_IPAC_ALE   0
#define ASUS_IPAC_DATA  1

#define ASUS_ISACHSCX   1
#define ASUS_IPAC 2

/* CARD_ADR (Write) */
#define ASUS_RESET      0x80  /* Bit 7 Reset-Leitung */

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.asus.adr, cs->hw.asus.isac, offset));
}

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

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

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

static u_char
ReadISAC_IPAC(struct IsdnCardState *cs, u_char offset)
{
      return (readreg(cs->hw.asus.adr, cs->hw.asus.isac, offset|0x80));
}

static void
WriteISAC_IPAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
      writereg(cs->hw.asus.adr, cs->hw.asus.isac, offset|0x80, value);
}

static void
ReadISACfifo_IPAC(struct IsdnCardState *cs, u_char * data, int size)
{
      readfifo(cs->hw.asus.adr, cs->hw.asus.isac, 0x80, data, size);
}

static void
WriteISACfifo_IPAC(struct IsdnCardState *cs, u_char * data, int size)
{
      writefifo(cs->hw.asus.adr, cs->hw.asus.isac, 0x80, data, size);
}

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

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

/*
 * fast interrupt HSCX stuff goes here
 */

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

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

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

#include "hscx_irq.c"

static irqreturn_t
asuscom_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.asus.adr, cs->hw.asus.hscx, HSCX_ISTA + 0x40);
      Start_HSCX:
      if (val)
            hscx_int_main(cs, val);
      val = readreg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_ISTA);
      Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = readreg(cs->hw.asus.adr, cs->hw.asus.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.asus.adr, cs->hw.asus.isac, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK, 0xFF);
      writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK + 0x40, 0xFF);
      writereg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_MASK, 0xFF);
      writereg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_MASK, 0x0);
      writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK, 0x0);
      writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK + 0x40, 0x0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static irqreturn_t
asuscom_interrupt_ipac(int intno, void *dev_id)
{
      struct IsdnCardState *cs = dev_id;
      u_char ista, val, icnt = 5;
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
      ista = readreg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_ISTA);
Start_IPAC:
      if (cs->debug & L1_DEB_IPAC)
            debugl1(cs, "IPAC ISTA %02X", ista);
      if (ista & 0x0f) {
            val = readreg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_ISTA + 0x40);
            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 & readreg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_ISTA | 0x80);
            if (val) {
                  isac_interrupt(cs, val);
            }
      }
      if (ista & 0x10) {
            val = 0x01;
            isac_interrupt(cs, val);
      }
      ista  = readreg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_ISTA);
      if ((ista & 0x3f) && icnt) {
            icnt--;
            goto Start_IPAC;
      }
      if (!icnt)
            printk(KERN_WARNING "ASUS IRQ LOOP\n");
      writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_MASK, 0xFF);
      writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_MASK, 0xC0);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
release_io_asuscom(struct IsdnCardState *cs)
{
      int bytecnt = 8;

      if (cs->hw.asus.cfg_reg)
            release_region(cs->hw.asus.cfg_reg, bytecnt);
}

static void
reset_asuscom(struct IsdnCardState *cs)
{
      if (cs->subtyp == ASUS_IPAC)
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_POTA2, 0x20);
      else
            byteout(cs->hw.asus.adr, ASUS_RESET);     /* Reset On */
      mdelay(10);
      if (cs->subtyp == ASUS_IPAC)
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_POTA2, 0x0);
      else
            byteout(cs->hw.asus.adr, 0);  /* Reset Off */
      mdelay(10);
      if (cs->subtyp == ASUS_IPAC) {
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_CONF, 0x0);
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_ACFG, 0xff);
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_AOE, 0x0);
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_MASK, 0xc0);
            writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_PCFG, 0x12);
      }
}

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

      switch (mt) {
            case CARD_RESET:
                  spin_lock_irqsave(&cs->lock, flags);
                  reset_asuscom(cs);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_RELEASE:
                  release_io_asuscom(cs);
                  return(0);
            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  cs->debug |= L1_DEB_IPAC;
                  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 asus_ids[] __devinitdata = {
      { ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1688),
        ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1688), 
        (unsigned long) "Asus1688 PnP" },
      { ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1690),
        ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1690), 
        (unsigned long) "Asus1690 PnP" },
      { ISAPNP_VENDOR('S', 'I', 'E'), ISAPNP_FUNCTION(0x0020),
        ISAPNP_VENDOR('S', 'I', 'E'), ISAPNP_FUNCTION(0x0020), 
        (unsigned long) "Isurf2 PnP" },
      { ISAPNP_VENDOR('E', 'L', 'F'), ISAPNP_FUNCTION(0x0000),
        ISAPNP_VENDOR('E', 'L', 'F'), ISAPNP_FUNCTION(0x0000), 
        (unsigned long) "Iscas TE320" },
      { 0, }
};

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

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

      strcpy(tmp, Asuscom_revision);
      printk(KERN_INFO "HiSax: Asuscom ISDNLink driver Rev. %s\n", HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_ASUSCOM)
            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 "AsusPnP: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 "AsusPnP: PnP error card found, no device\n");
                        }
                  }
                  ipid++;
                  pnp_c = NULL;
            } 
            if (!ipid->card_vendor) {
                  printk(KERN_INFO "AsusPnP: no ISAPnP card found\n");
                  return(0);
            }
      }
#endif
      bytecnt = 8;
      cs->hw.asus.cfg_reg = card->para[1];
      cs->irq = card->para[0];
      if (!request_region(cs->hw.asus.cfg_reg, bytecnt, "asuscom isdn")) {
            printk(KERN_WARNING
                   "HiSax: %s config port %x-%x already in use\n",
                   CardType[card->typ],
                   cs->hw.asus.cfg_reg,
                   cs->hw.asus.cfg_reg + bytecnt);
            return (0);
      }
      printk(KERN_INFO "ISDNLink: defined at 0x%x IRQ %d\n",
            cs->hw.asus.cfg_reg, cs->irq);
      setup_isac(cs);
      cs->BC_Read_Reg = &ReadHSCX;
      cs->BC_Write_Reg = &WriteHSCX;
      cs->BC_Send_Data = &hscx_fill_fifo;
      cs->cardmsg = &Asus_card_msg;
      val = readreg(cs->hw.asus.cfg_reg + ASUS_IPAC_ALE, 
            cs->hw.asus.cfg_reg + ASUS_IPAC_DATA, IPAC_ID);
      if ((val == 1) || (val == 2)) {
            cs->subtyp = ASUS_IPAC;
            cs->hw.asus.adr  = cs->hw.asus.cfg_reg + ASUS_IPAC_ALE;
            cs->hw.asus.isac = cs->hw.asus.cfg_reg + ASUS_IPAC_DATA;
            cs->hw.asus.hscx = cs->hw.asus.cfg_reg + ASUS_IPAC_DATA;
            test_and_set_bit(HW_IPAC, &cs->HW_Flags);
            cs->readisac = &ReadISAC_IPAC;
            cs->writeisac = &WriteISAC_IPAC;
            cs->readisacfifo = &ReadISACfifo_IPAC;
            cs->writeisacfifo = &WriteISACfifo_IPAC;
            cs->irq_func = &asuscom_interrupt_ipac;
            printk(KERN_INFO "Asus: IPAC version %x\n", val);
      } else {
            cs->subtyp = ASUS_ISACHSCX;
            cs->hw.asus.adr = cs->hw.asus.cfg_reg + ASUS_ADR;
            cs->hw.asus.isac = cs->hw.asus.cfg_reg + ASUS_ISAC;
            cs->hw.asus.hscx = cs->hw.asus.cfg_reg + ASUS_HSCX;
            cs->hw.asus.u7 = cs->hw.asus.cfg_reg + ASUS_CTRL_U7;
            cs->hw.asus.pots = cs->hw.asus.cfg_reg + ASUS_CTRL_POTS;
            cs->readisac = &ReadISAC;
            cs->writeisac = &WriteISAC;
            cs->readisacfifo = &ReadISACfifo;
            cs->writeisacfifo = &WriteISACfifo;
            cs->irq_func = &asuscom_interrupt;
            ISACVersion(cs, "ISDNLink:");
            if (HscxVersion(cs, "ISDNLink:")) {
                  printk(KERN_WARNING
                  "ISDNLink: wrong HSCX versions check IO address\n");
                  release_io_asuscom(cs);
                  return (0);
            }
      }
      return (1);
}

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