avm_a1p.c

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/* $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     <[email protected]>
 *
 * 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 __devinit 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);
}