teleint.c

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/* $Id: teleint.c,v 1.16.2.5 2004/01/19 15:31:50 keil Exp $
 *
 * low level stuff for TeleInt isdn cards
 *
 * Author       Karsten Keil
 * Copyright    by Karsten Keil      <[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 "hfc_2bs0.h"
#include "isdnl1.h"

static const char *TeleInt_revision = "$Revision: 1.16.2.5 $";

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

static inline u_char
readreg(unsigned int ale, unsigned int adr, u_char off)
{
    register u_char ret;
    int max_delay = 2000;

    byteout(ale, off);
    ret = HFC_BUSY & bytein(ale);
    while (ret && --max_delay)
        ret = HFC_BUSY & bytein(ale);
    if (!max_delay) {
        printk(KERN_WARNING "TeleInt Busy not inactive\n");
        return (0);
    }
    ret = bytein(adr);
    return (ret);
}

static inline void
readfifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
{
    register u_char ret;
    register int max_delay = 20000;
    register int i;

    byteout(ale, off);
    for (i = 0; i < size; i++) {
        ret = HFC_BUSY & bytein(ale);
        while (ret && --max_delay)
            ret = HFC_BUSY & bytein(ale);
        if (!max_delay) {
            printk(KERN_WARNING "TeleInt Busy not inactive\n");
            return;
        }
        data[i] = bytein(adr);
    }
}


static inline void
writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
{
    register u_char ret;
    int max_delay = 2000;

    byteout(ale, off);
    ret = HFC_BUSY & bytein(ale);
    while (ret && --max_delay)
        ret = HFC_BUSY & bytein(ale);
    if (!max_delay) {
        printk(KERN_WARNING "TeleInt Busy not inactive\n");
        return;
    }
    byteout(adr, data);
}

static inline void
writefifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
{
    register u_char ret;
    register int max_delay = 20000;
    register int i;

    byteout(ale, off);
    for (i = 0; i < size; i++) {
        ret = HFC_BUSY & bytein(ale);
        while (ret && --max_delay)
            ret = HFC_BUSY & bytein(ale);
        if (!max_delay) {
            printk(KERN_WARNING "TeleInt Busy not inactive\n");
            return;
        }
        byteout(adr, data[i]);
    }
}

/* Interface functions */

static u_char
ReadISAC(struct IsdnCardState *cs, u_char offset)
{
    cs->hw.hfc.cip = offset;
    return (readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset));
}

static void
WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
{
    cs->hw.hfc.cip = offset;
    writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset, value);
}

static void
ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
{
    cs->hw.hfc.cip = 0;
    readfifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
}

static void
WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
{
    cs->hw.hfc.cip = 0;
    writefifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
}

static u_char
ReadHFC(struct IsdnCardState *cs, int data, u_char reg)
{
    register u_char ret;

    if (data) {
        cs->hw.hfc.cip = reg;
        byteout(cs->hw.hfc.addr | 1, reg);
        ret = bytein(cs->hw.hfc.addr);
        if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
            debugl1(cs, "hfc RD %02x %02x", reg, ret);
    } else
        ret = bytein(cs->hw.hfc.addr | 1);
    return (ret);
}

static void
WriteHFC(struct IsdnCardState *cs, int data, u_char reg, u_char value)
{
    byteout(cs->hw.hfc.addr | 1, reg);
    cs->hw.hfc.cip = reg;
    if (data)
        byteout(cs->hw.hfc.addr, value);
    if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
        debugl1(cs, "hfc W%c %02x %02x", data ? 'D' : 'C', reg, value);
}

static irqreturn_t
TeleInt_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.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
Start_ISAC:
    if (val)
        isac_interrupt(cs, val);
    val = readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
    if (val) {
        if (cs->debug & L1_DEB_ISAC)
            debugl1(cs, "ISAC IntStat after IntRoutine");
        goto Start_ISAC;
    }
    writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0xFF);
    writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0x0);
    spin_unlock_irqrestore(&cs->lock, flags);
    return IRQ_HANDLED;
}

static void
TeleInt_Timer(struct IsdnCardState *cs)
{
    int stat = 0;
    u_long flags;

    spin_lock_irqsave(&cs->lock, flags);
    if (cs->bcs[0].mode) {
        stat |= 1;
        main_irq_hfc(&cs->bcs[0]);
    }
    if (cs->bcs[1].mode) {
        stat |= 2;
        main_irq_hfc(&cs->bcs[1]);
    }
    spin_unlock_irqrestore(&cs->lock, flags);
    stat = HZ / 100;
    if (!stat)
        stat = 1;
    cs->hw.hfc.timer.expires = jiffies + stat;
    add_timer(&cs->hw.hfc.timer);
}

static void
release_io_TeleInt(struct IsdnCardState *cs)
{
    del_timer(&cs->hw.hfc.timer);
    releasehfc(cs);
    if (cs->hw.hfc.addr)
        release_region(cs->hw.hfc.addr, 2);
}

static void
reset_TeleInt(struct IsdnCardState *cs)
{
    printk(KERN_INFO "TeleInt: resetting card\n");
    cs->hw.hfc.cirm |= HFC_RESET;
    byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);  /* Reset On */
    mdelay(10);
    cs->hw.hfc.cirm &= ~HFC_RESET;
    byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);  /* Reset Off */
    mdelay(10);
}

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

    switch (mt) {
    case CARD_RESET:
        spin_lock_irqsave(&cs->lock, flags);
        reset_TeleInt(cs);
        spin_unlock_irqrestore(&cs->lock, flags);
        return (0);
    case CARD_RELEASE:
        release_io_TeleInt(cs);
        return (0);
    case CARD_INIT:
        spin_lock_irqsave(&cs->lock, flags);
        reset_TeleInt(cs);
        inithfc(cs);
        clear_pending_isac_ints(cs);
        initisac(cs);
        /* Reenable all IRQ */
        cs->writeisac(cs, ISAC_MASK, 0);
        cs->writeisac(cs, ISAC_CMDR, 0x41);
        spin_unlock_irqrestore(&cs->lock, flags);
        delay = HZ / 100;
        if (!delay)
            delay = 1;
        cs->hw.hfc.timer.expires = jiffies + delay;
        add_timer(&cs->hw.hfc.timer);
        return (0);
    case CARD_TEST:
        return (0);
    }
    return (0);
}

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

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

    cs->hw.hfc.addr = card->para[1] & 0x3fe;
    cs->irq = card->para[0];
    cs->hw.hfc.cirm = HFC_CIRM;
    cs->hw.hfc.isac_spcr = 0x00;
    cs->hw.hfc.cip = 0;
    cs->hw.hfc.ctmt = HFC_CTMT | HFC_CLTIMER;
    cs->bcs[0].hw.hfc.send = NULL;
    cs->bcs[1].hw.hfc.send = NULL;
    cs->hw.hfc.fifosize = 7 * 1024 + 512;
    cs->hw.hfc.timer.function = (void *) TeleInt_Timer;
    cs->hw.hfc.timer.data = (long) cs;
    init_timer(&cs->hw.hfc.timer);
    if (!request_region(cs->hw.hfc.addr, 2, "TeleInt isdn")) {
        printk(KERN_WARNING
               "HiSax: TeleInt config port %x-%x already in use\n",
               cs->hw.hfc.addr,
               cs->hw.hfc.addr + 2);
        return (0);
    }
    /* HW IO = IO */
    byteout(cs->hw.hfc.addr, cs->hw.hfc.addr & 0xff);
    byteout(cs->hw.hfc.addr | 1, ((cs->hw.hfc.addr & 0x300) >> 8) | 0x54);
    switch (cs->irq) {
    case 3:
        cs->hw.hfc.cirm |= HFC_INTA;
        break;
    case 4:
        cs->hw.hfc.cirm |= HFC_INTB;
        break;
    case 5:
        cs->hw.hfc.cirm |= HFC_INTC;
        break;
    case 7:
        cs->hw.hfc.cirm |= HFC_INTD;
        break;
    case 10:
        cs->hw.hfc.cirm |= HFC_INTE;
        break;
    case 11:
        cs->hw.hfc.cirm |= HFC_INTF;
        break;
    default:
        printk(KERN_WARNING "TeleInt: wrong IRQ\n");
        release_io_TeleInt(cs);
        return (0);
    }
    byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);
    byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.ctmt);

    printk(KERN_INFO "TeleInt: defined at 0x%x IRQ %d\n",
           cs->hw.hfc.addr, cs->irq);

    setup_isac(cs);
    cs->readisac = &ReadISAC;
    cs->writeisac = &WriteISAC;
    cs->readisacfifo = &ReadISACfifo;
    cs->writeisacfifo = &WriteISACfifo;
    cs->BC_Read_Reg = &ReadHFC;
    cs->BC_Write_Reg = &WriteHFC;
    cs->cardmsg = &TeleInt_card_msg;
    cs->irq_func = &TeleInt_interrupt;
    ISACVersion(cs, "TeleInt:");
    return (1);
}