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sportster.c

/* $Id: sportster.c,v 1.16.2.4 2004/01/13 23:48:39 keil Exp $
 *
 * low level stuff for USR Sportster internal TA
 *
 * 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 Christian "naddy" Weisgerber (3Com, US Robotics) for documentation
 *
 *
 */
#include <linux/init.h>
#include "hisax.h"
#include "isac.h"
#include "hscx.h"
#include "isdnl1.h"

extern const char *CardType[];
static const char *sportster_revision = "$Revision: 1.16.2.4 $";

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

#define      SPORTSTER_ISAC         0xC000
#define      SPORTSTER_HSCXA  0x0000
#define      SPORTSTER_HSCXB  0x4000
#define      SPORTSTER_RES_IRQ      0x8000
#define      SPORTSTER_RESET  0x80
#define      SPORTSTER_INTE         0x40

static inline int
calc_off(unsigned int base, unsigned int off)
{
      return(base + ((off & 0xfc)<<8) + ((off & 3)<<1));
}

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);
}

/* Interface functions */

static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
      return (bytein(calc_off(cs->hw.spt.isac, offset)));
}

static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
      byteout(calc_off(cs->hw.spt.isac, offset), value);
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      read_fifo(cs->hw.spt.isac, data, size);
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      write_fifo(cs->hw.spt.isac, data, size);
}

static u_char
ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
{
      return (bytein(calc_off(cs->hw.spt.hscx[hscx], offset)));
}

static void
WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
{
      byteout(calc_off(cs->hw.spt.hscx[hscx], offset), value);
}

/*
 * fast interrupt HSCX stuff goes here
 */

#define READHSCX(cs, nr, reg) bytein(calc_off(cs->hw.spt.hscx[nr], reg))
#define WRITEHSCX(cs, nr, reg, data) byteout(calc_off(cs->hw.spt.hscx[nr], reg), data)
#define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.spt.hscx[nr], ptr, cnt)
#define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.spt.hscx[nr], ptr, cnt)

#include "hscx_irq.c"

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

      spin_lock_irqsave(&cs->lock, flags);
      val = READHSCX(cs, 1, HSCX_ISTA);
      Start_HSCX:
      if (val)
            hscx_int_main(cs, val);
      val = ReadISAC(cs, ISAC_ISTA);
      Start_ISAC:
      if (val)
            isac_interrupt(cs, val);
      val = READHSCX(cs, 1, HSCX_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_HSCX)
                  debugl1(cs, "HSCX IntStat after IntRoutine");
            goto Start_HSCX;
      }
      val = ReadISAC(cs, ISAC_ISTA);
      if (val) {
            if (cs->debug & L1_DEB_ISAC)
                  debugl1(cs, "ISAC IntStat after IntRoutine");
            goto Start_ISAC;
      }
      /* get a new irq impulse if there any pending */
      bytein(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ +1);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

static void
release_io_sportster(struct IsdnCardState *cs)
{
      int i, adr;

      byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, 0);
      for (i=0; i<64; i++) {
            adr = cs->hw.spt.cfg_reg + i *1024;
            release_region(adr, 8);
      }
}

static void
reset_sportster(struct IsdnCardState *cs)
{
      cs->hw.spt.res_irq |= SPORTSTER_RESET; /* Reset On */
      byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
      mdelay(10);
      cs->hw.spt.res_irq &= ~SPORTSTER_RESET; /* Reset Off */
      byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
      mdelay(10);
}

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

      switch (mt) {
            case CARD_RESET:
                  spin_lock_irqsave(&cs->lock, flags);
                  reset_sportster(cs);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_RELEASE:
                  release_io_sportster(cs);
                  return(0);
            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  reset_sportster(cs);
                  inithscxisac(cs, 1);
                  cs->hw.spt.res_irq |= SPORTSTER_INTE; /* IRQ On */
                  byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
                  inithscxisac(cs, 2);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return(0);
            case CARD_TEST:
                  return(0);
      }
      return(0);
}

static int __devinit
get_io_range(struct IsdnCardState *cs)
{
      int i, j, adr;
      
      for (i=0;i<64;i++) {
            adr = cs->hw.spt.cfg_reg + i *1024;
            if (!request_region(adr, 8, "sportster")) {
                  printk(KERN_WARNING
                        "HiSax: %s config port %x-%x already in use\n",
                        CardType[cs->typ], adr, adr + 8);
                  break;
            } 
      }
      if (i==64)
            return(1);
      else {
            for (j=0; j<i; j++) {
                  adr = cs->hw.spt.cfg_reg + j *1024;
                  release_region(adr, 8);
            }
            return(0);
      }
}

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

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

      cs->hw.spt.cfg_reg = card->para[1];
      cs->irq = card->para[0];
      if (!get_io_range(cs))
            return (0);
      cs->hw.spt.isac = cs->hw.spt.cfg_reg + SPORTSTER_ISAC;
      cs->hw.spt.hscx[0] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXA;
      cs->hw.spt.hscx[1] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXB;
      
      switch(cs->irq) {
            case 5:     cs->hw.spt.res_irq = 1;
                  break;
            case 7:     cs->hw.spt.res_irq = 2;
                  break;
            case 10:cs->hw.spt.res_irq = 3;
                  break;
            case 11:cs->hw.spt.res_irq = 4;
                  break;
            case 12:cs->hw.spt.res_irq = 5;
                  break;
            case 14:cs->hw.spt.res_irq = 6;
                  break;
            case 15:cs->hw.spt.res_irq = 7;
                  break;
            default:release_io_sportster(cs);
                  printk(KERN_WARNING "Sportster: wrong IRQ\n");
                  return(0);
      }
      printk(KERN_INFO "HiSax: %s config irq:%d cfg:0x%X\n",
            CardType[cs->typ], cs->irq, cs->hw.spt.cfg_reg);
      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 = &Sportster_card_msg;
      cs->irq_func = &sportster_interrupt;
      ISACVersion(cs, "Sportster:");
      if (HscxVersion(cs, "Sportster:")) {
            printk(KERN_WARNING
                   "Sportster: wrong HSCX versions check IO address\n");
            release_io_sportster(cs);
            return (0);
      }
      return (1);
}

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