LXR linux/drivers/isdn/hisax/s0box.c

   1/* $Id: s0box.c,v 2.6.2.4 2004/01/13 23:48:39 keil Exp $
   2 *
   3 * low level stuff for Creatix S0BOX
   4 *
   5 * Author       Enrik Berkhan
   6 * Copyright    by Enrik Berkhan <enrik@starfleet.inka.de>
   7 *
   8 * This software may be used and distributed according to the terms
   9 * of the GNU General Public License, incorporated herein by reference.
  10 *
  11 */
  12
  13#include <linux/init.h>
  14#include "hisax.h"
  15#include "isac.h"
  16#include "hscx.h"
  17#include "isdnl1.h"
  18
  19static const char *s0box_revision = "$Revision: 2.6.2.4 $";
  20
  21static inline void
  22writereg(unsigned int padr, signed int addr, u_char off, u_char val) {
  23        outb_p(0x1c, padr + 2);
  24        outb_p(0x14, padr + 2);
  25        outb_p((addr + off) & 0x7f, padr);
  26        outb_p(0x16, padr + 2);
  27        outb_p(val, padr);
  28        outb_p(0x17, padr + 2);
  29        outb_p(0x14, padr + 2);
  30        outb_p(0x1c, padr + 2);
  31}
  32
  33static u_char nibtab[] = { 1, 9, 5, 0xd, 3, 0xb, 7, 0xf,
  34                           0, 0, 0, 0, 0, 0, 0, 0,
  35                           0, 8, 4, 0xc, 2, 0xa, 6, 0xe };
  36
  37static inline u_char
  38readreg(unsigned int padr, signed int addr, u_char off) {
  39        register u_char n1, n2;
  40
  41        outb_p(0x1c, padr + 2);
  42        outb_p(0x14, padr + 2);
  43        outb_p((addr + off) | 0x80, padr);
  44        outb_p(0x16, padr + 2);
  45        outb_p(0x17, padr + 2);
  46        n1 = (inb_p(padr + 1) >> 3) & 0x17;
  47        outb_p(0x16, padr + 2);
  48        n2 = (inb_p(padr + 1) >> 3) & 0x17;
  49        outb_p(0x14, padr + 2);
  50        outb_p(0x1c, padr + 2);
  51        return nibtab[n1] | (nibtab[n2] << 4);
  52}
  53
  54static inline void
  55read_fifo(unsigned int padr, signed int adr, u_char *data, int size)
  56{
  57        int i;
  58        register u_char n1, n2;
  59
  60        outb_p(0x1c, padr + 2);
  61        outb_p(0x14, padr + 2);
  62        outb_p(adr | 0x80, padr);
  63        outb_p(0x16, padr + 2);
  64        for (i = 0; i < size; i++) {
  65                outb_p(0x17, padr + 2);
  66                n1 = (inb_p(padr + 1) >> 3) & 0x17;
  67                outb_p(0x16, padr + 2);
  68                n2 = (inb_p(padr + 1) >> 3) & 0x17;
  69                *(data++) = nibtab[n1] | (nibtab[n2] << 4);
  70        }
  71        outb_p(0x14, padr + 2);
  72        outb_p(0x1c, padr + 2);
  73        return;
  74}
  75
  76static inline void
  77write_fifo(unsigned int padr, signed int adr, u_char *data, int size)
  78{
  79        int i;
  80        outb_p(0x1c, padr + 2);
  81        outb_p(0x14, padr + 2);
  82        outb_p(adr & 0x7f, padr);
  83        for (i = 0; i < size; i++) {
  84                outb_p(0x16, padr + 2);
  85                outb_p(*(data++), padr);
  86                outb_p(0x17, padr + 2);
  87        }
  88        outb_p(0x14, padr + 2);
  89        outb_p(0x1c, padr + 2);
  90        return;
  91}
  92
  93/* Interface functions */
  94
  95static u_char
  96ReadISAC(struct IsdnCardState *cs, u_char offset)
  97{
  98        return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
  99}
 100
 101static void
 102WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
 103{
 104        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset, value);
 105}
 106
 107static void
 108ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
 109{
 110        read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
 111}
 112
 113static void
 114WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
 115{
 116        write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
 117}
 118
 119static u_char
 120ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
 121{
 122        return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset));
 123}
 124
 125static void
 126WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 127{
 128        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset, value);
 129}
 130
 131/*
 132 * fast interrupt HSCX stuff goes here
 133 */
 134
 135#define READHSCX(cs, nr, reg) readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg)
 136#define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg, data)
 137#define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
 138#define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
 139
 140#include "hscx_irq.c"
 141
 142static irqreturn_t
 143s0box_interrupt(int intno, void *dev_id)
 144{
 145#define MAXCOUNT 5
 146        struct IsdnCardState *cs = dev_id;
 147        u_char val;
 148        u_long flags;
 149        int count = 0;
 150
 151        spin_lock_irqsave(&cs->lock, flags);
 152        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
 153Start_HSCX:
 154        if (val)
 155                hscx_int_main(cs, val);
 156        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 157Start_ISAC:
 158        if (val)
 159                isac_interrupt(cs, val);
 160        count++;
 161        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
 162        if (val && count < MAXCOUNT) {
 163                if (cs->debug & L1_DEB_HSCX)
 164                        debugl1(cs, "HSCX IntStat after IntRoutine");
 165                goto Start_HSCX;
 166        }
 167        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 168        if (val && count < MAXCOUNT) {
 169                if (cs->debug & L1_DEB_ISAC)
 170                        debugl1(cs, "ISAC IntStat after IntRoutine");
 171                goto Start_ISAC;
 172        }
 173        if (count >= MAXCOUNT)
 174                printk(KERN_WARNING "S0Box: more than %d loops in s0box_interrupt\n", count);
 175        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0xFF);
 176        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0xFF);
 177        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0xFF);
 178        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0x0);
 179        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0x0);
 180        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0x0);
 181        spin_unlock_irqrestore(&cs->lock, flags);
 182        return IRQ_HANDLED;
 183}
 184
 185static void
 186release_io_s0box(struct IsdnCardState *cs)
 187{
 188        release_region(cs->hw.teles3.cfg_reg, 8);
 189}
 190
 191static int
 192S0Box_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 193{
 194        u_long flags;
 195
 196        switch (mt) {
 197        case CARD_RESET:
 198                break;
 199        case CARD_RELEASE:
 200                release_io_s0box(cs);
 201                break;
 202        case CARD_INIT:
 203                spin_lock_irqsave(&cs->lock, flags);
 204                inithscxisac(cs, 3);
 205                spin_unlock_irqrestore(&cs->lock, flags);
 206                break;
 207        case CARD_TEST:
 208                break;
 209        }
 210        return (0);
 211}
 212
 213int setup_s0box(struct IsdnCard *card)
 214{
 215        struct IsdnCardState *cs = card->cs;
 216        char tmp[64];
 217
 218        strcpy(tmp, s0box_revision);
 219        printk(KERN_INFO "HiSax: S0Box IO driver Rev. %s\n", HiSax_getrev(tmp));
 220        if (cs->typ != ISDN_CTYPE_S0BOX)
 221                return (0);
 222
 223        cs->hw.teles3.cfg_reg = card->para[1];
 224        cs->hw.teles3.hscx[0] = -0x20;
 225        cs->hw.teles3.hscx[1] = 0x0;
 226        cs->hw.teles3.isac = 0x20;
 227        cs->hw.teles3.isacfifo = cs->hw.teles3.isac + 0x3e;
 228        cs->hw.teles3.hscxfifo[0] = cs->hw.teles3.hscx[0] + 0x3e;
 229        cs->hw.teles3.hscxfifo[1] = cs->hw.teles3.hscx[1] + 0x3e;
 230        cs->irq = card->para[0];
 231        if (!request_region(cs->hw.teles3.cfg_reg, 8, "S0Box parallel I/O")) {
 232                printk(KERN_WARNING "HiSax: S0Box ports %x-%x already in use\n",
 233                       cs->hw.teles3.cfg_reg,
 234                       cs->hw.teles3.cfg_reg + 7);
 235                return 0;
 236        }
 237        printk(KERN_INFO "HiSax: S0Box config irq:%d isac:0x%x  cfg:0x%x\n",
 238               cs->irq,
 239               cs->hw.teles3.isac, cs->hw.teles3.cfg_reg);
 240        printk(KERN_INFO "HiSax: hscx A:0x%x  hscx B:0x%x\n",
 241               cs->hw.teles3.hscx[0], cs->hw.teles3.hscx[1]);
 242        setup_isac(cs);
 243        cs->readisac = &ReadISAC;
 244        cs->writeisac = &WriteISAC;
 245        cs->readisacfifo = &ReadISACfifo;
 246        cs->writeisacfifo = &WriteISACfifo;
 247        cs->BC_Read_Reg = &ReadHSCX;
 248        cs->BC_Write_Reg = &WriteHSCX;
 249        cs->BC_Send_Data = &hscx_fill_fifo;
 250        cs->cardmsg = &S0Box_card_msg;
 251        cs->irq_func = &s0box_interrupt;
 252        ISACVersion(cs, "S0Box:");
 253        if (HscxVersion(cs, "S0Box:")) {
 254                printk(KERN_WARNING
 255                       "S0Box: wrong HSCX versions check IO address\n");
 256                release_io_s0box(cs);
 257                return (0);
 258        }
 259        return (1);
 260}
 261