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avm_a1p.c

/* $Id: avm_a1p.c,v 2.9.2.5 2004/01/24 20:47:19 keil Exp $
 *
 * low level stuff for the following AVM cards:
 * A1 PCMCIA
 * FRITZ!Card PCMCIA
 * FRITZ!Card PCMCIA 2.0
 *
 * Author       Carsten Paeth
 * Copyright    by Carsten Paeth     <calle@calle.de>
 *
 * 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"

/* register offsets */
#define ADDRREG_OFFSET        0x02
#define DATAREG_OFFSET        0x03
#define ASL0_OFFSET           0x04
#define ASL1_OFFSET           0x05
#define MODREG_OFFSET         0x06
#define VERREG_OFFSET         0x07

/* address offsets */
#define ISAC_FIFO_OFFSET      0x00
#define ISAC_REG_OFFSET       0x20
#define HSCX_CH_DIFF          0x40
#define HSCX_FIFO_OFFSET      0x80
#define HSCX_REG_OFFSET       0xa0

/* read bits ASL0 */
#define      ASL0_R_TIMER           0x10 /* active low */
#define      ASL0_R_ISAC            0x20 /* active low */
#define      ASL0_R_HSCX            0x40 /* active low */
#define      ASL0_R_TESTBIT         0x80
#define  ASL0_R_IRQPENDING    (ASL0_R_ISAC|ASL0_R_HSCX|ASL0_R_TIMER)

/* write bits ASL0 */
#define      ASL0_W_RESET           0x01
#define      ASL0_W_TDISABLE  0x02
#define      ASL0_W_TRESET          0x04
#define      ASL0_W_IRQENABLE 0x08
#define      ASL0_W_TESTBIT         0x80

/* write bits ASL1 */
#define      ASL1_W_LED0            0x10
#define      ASL1_W_LED1            0x20
#define      ASL1_W_ENABLE_S0 0xC0
 
#define byteout(addr,val) outb(val,addr)
#define bytein(addr) inb(addr)

static const char *avm_revision = "$Revision: 2.9.2.5 $";

static inline u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
        u_char ret;

        offset -= 0x20;
        byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,ISAC_REG_OFFSET+offset);
      ret = bytein(cs->hw.avm.cfg_reg+DATAREG_OFFSET);
      return ret;
}

static inline void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
        offset -= 0x20;
        byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,ISAC_REG_OFFSET+offset);
      byteout(cs->hw.avm.cfg_reg+DATAREG_OFFSET, value);
}

static inline void
ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,ISAC_FIFO_OFFSET);
      insb(cs->hw.avm.cfg_reg+DATAREG_OFFSET, data, size);
}

static inline void
WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
{
      byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,ISAC_FIFO_OFFSET);
      outsb(cs->hw.avm.cfg_reg+DATAREG_OFFSET, data, size);
}

static inline u_char
ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
{
      u_char ret;

        offset -= 0x20;
      byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,
                  HSCX_REG_OFFSET+hscx*HSCX_CH_DIFF+offset);
      ret = bytein(cs->hw.avm.cfg_reg+DATAREG_OFFSET);
      return ret;
}

static inline void
WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
{
        offset -= 0x20;
      byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,
                  HSCX_REG_OFFSET+hscx*HSCX_CH_DIFF+offset);
      byteout(cs->hw.avm.cfg_reg+DATAREG_OFFSET, value);
}

static inline void
ReadHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
{
      byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,
                  HSCX_FIFO_OFFSET+hscx*HSCX_CH_DIFF);
      insb(cs->hw.avm.cfg_reg+DATAREG_OFFSET, data, size);
}

static inline void
WriteHSCXfifo(struct IsdnCardState *cs, int hscx, u_char * data, int size)
{
      byteout(cs->hw.avm.cfg_reg+ADDRREG_OFFSET,
                  HSCX_FIFO_OFFSET+hscx*HSCX_CH_DIFF);
      outsb(cs->hw.avm.cfg_reg+DATAREG_OFFSET, data, size);
}

/*
 * 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
avm_a1p_interrupt(int intno, void *dev_id)
{
      struct IsdnCardState *cs = dev_id;
      u_char val, sval;
      u_long flags;

      spin_lock_irqsave(&cs->lock, flags);
      while ((sval = (~bytein(cs->hw.avm.cfg_reg+ASL0_OFFSET) & ASL0_R_IRQPENDING))) {
            if (cs->debug & L1_DEB_INTSTAT)
                  debugl1(cs, "avm IntStatus %x", sval);
            if (sval & ASL0_R_HSCX) {
                        val = ReadHSCX(cs, 1, HSCX_ISTA);
                  if (val)
                        hscx_int_main(cs, val);
            }
            if (sval & ASL0_R_ISAC) {
                  val = ReadISAC(cs, ISAC_ISTA);
                  if (val)
                        isac_interrupt(cs, val);
            }
      }
      WriteHSCX(cs, 0, HSCX_MASK, 0xff);
      WriteHSCX(cs, 1, HSCX_MASK, 0xff);
      WriteISAC(cs, ISAC_MASK, 0xff);
      WriteISAC(cs, ISAC_MASK, 0x00);
      WriteHSCX(cs, 0, HSCX_MASK, 0x00);
      WriteHSCX(cs, 1, HSCX_MASK, 0x00);
      spin_unlock_irqrestore(&cs->lock, flags);
      return IRQ_HANDLED;
}

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

      switch (mt) {
            case CARD_RESET:
                  spin_lock_irqsave(&cs->lock, flags);
                  byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,0x00);
                  HZDELAY(HZ / 5 + 1);
                  byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,ASL0_W_RESET);
                  HZDELAY(HZ / 5 + 1);
                  byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,0x00);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return 0;

            case CARD_RELEASE:
                  /* free_irq is done in HiSax_closecard(). */
                    /* free_irq(cs->irq, cs); */
                  return 0;

            case CARD_INIT:
                  spin_lock_irqsave(&cs->lock, flags);
                  byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,ASL0_W_TDISABLE|ASL0_W_TRESET|ASL0_W_IRQENABLE);
                  clear_pending_isac_ints(cs);
                  clear_pending_hscx_ints(cs);
                  inithscxisac(cs, 1);
                  inithscxisac(cs, 2);
                  spin_unlock_irqrestore(&cs->lock, flags);
                  return 0;

            case CARD_TEST:
                  /* we really don't need it for the PCMCIA Version */
                  return 0;

            default:
                  /* all card drivers ignore others, so we do the same */
                  return 0;
      }
      return 0;
}

int
setup_avm_a1_pcmcia(struct IsdnCard *card)
{
      u_char model, vers;
      struct IsdnCardState *cs = card->cs;
      char tmp[64];


      strcpy(tmp, avm_revision);
      printk(KERN_INFO "HiSax: AVM A1 PCMCIA driver Rev. %s\n",
                                     HiSax_getrev(tmp));
      if (cs->typ != ISDN_CTYPE_A1_PCMCIA)
            return (0);

      cs->hw.avm.cfg_reg = card->para[1];
      cs->irq = card->para[0];


      byteout(cs->hw.avm.cfg_reg+ASL1_OFFSET, ASL1_W_ENABLE_S0);
      byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,0x00);
      HZDELAY(HZ / 5 + 1);
      byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,ASL0_W_RESET);
      HZDELAY(HZ / 5 + 1);
      byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET,0x00);

      byteout(cs->hw.avm.cfg_reg+ASL0_OFFSET, ASL0_W_TDISABLE|ASL0_W_TRESET);

      model = bytein(cs->hw.avm.cfg_reg+MODREG_OFFSET);
      vers = bytein(cs->hw.avm.cfg_reg+VERREG_OFFSET);

      printk(KERN_INFO "AVM A1 PCMCIA: io 0x%x irq %d model %d version %d\n",
                        cs->hw.avm.cfg_reg, cs->irq, model, vers);

      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 = &AVM_card_msg;
      cs->irq_flags = IRQF_SHARED;
      cs->irq_func = &avm_a1p_interrupt;

      ISACVersion(cs, "AVM A1 PCMCIA:");
      if (HscxVersion(cs, "AVM A1 PCMCIA:")) {
            printk(KERN_WARNING
                   "AVM A1 PCMCIA: wrong HSCX versions check IO address\n");
            return (0);
      }
      return (1);
}

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