LXR linux-bk/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
  19extern const char *CardType[];
  20const char *s0box_revision = "$Revision: 2.6.2.4 $";
  21
  22static inline void
  23writereg(unsigned int padr, signed int addr, u_char off, u_char val) {
  24        outb_p(0x1c,padr+2);
  25        outb_p(0x14,padr+2);
  26        outb_p((addr+off)&0x7f,padr);
  27        outb_p(0x16,padr+2);
  28        outb_p(val,padr);
  29        outb_p(0x17,padr+2);
  30        outb_p(0x14,padr+2);
  31        outb_p(0x1c,padr+2);
  32}
  33
  34static u_char nibtab[] = { 1, 9, 5, 0xd, 3, 0xb, 7, 0xf,
  35                         0, 0, 0, 0, 0, 0, 0, 0,
  36                         0, 8, 4, 0xc, 2, 0xa, 6, 0xe } ;
  37
  38static inline u_char
  39readreg(unsigned int padr, signed int addr, u_char off) {
  40        register u_char n1, n2;
  41
  42        outb_p(0x1c,padr+2);
  43        outb_p(0x14,padr+2);
  44        outb_p((addr+off)|0x80,padr);
  45        outb_p(0x16,padr+2);
  46        outb_p(0x17,padr+2);
  47        n1 = (inb_p(padr+1) >> 3) & 0x17;
  48        outb_p(0x16,padr+2);
  49        n2 = (inb_p(padr+1) >> 3) & 0x17;
  50        outb_p(0x14,padr+2);
  51        outb_p(0x1c,padr+2);
  52        return nibtab[n1] | (nibtab[n2] << 4);
  53}
  54
  55static inline void
  56read_fifo(unsigned int padr, signed int adr, u_char * data, int size)
  57{
  58        int i;
  59        register u_char n1, n2;
  60        
  61        outb_p(0x1c, padr+2);
  62        outb_p(0x14, padr+2);
  63        outb_p(adr|0x80, padr);
  64        outb_p(0x16, padr+2);
  65        for (i=0; i<size; i++) {
  66                outb_p(0x17, padr+2);
  67                n1 = (inb_p(padr+1) >> 3) & 0x17;
  68                outb_p(0x16,padr+2);
  69                n2 = (inb_p(padr+1) >> 3) & 0x17;
  70                *(data++)=nibtab[n1] | (nibtab[n2] << 4);
  71        }
  72        outb_p(0x14,padr+2);
  73        outb_p(0x1c,padr+2);
  74        return;
  75}
  76
  77static inline void
  78write_fifo(unsigned int padr, signed int adr, u_char * data, int size)
  79{
  80        int i;
  81        outb_p(0x1c, padr+2);
  82        outb_p(0x14, padr+2);
  83        outb_p(adr&0x7f, padr);
  84        for (i=0; i<size; i++) {
  85                outb_p(0x16, padr+2);
  86                outb_p(*(data++), padr);
  87                outb_p(0x17, padr+2);
  88        }
  89        outb_p(0x14,padr+2);
  90        outb_p(0x1c,padr+2);
  91        return;
  92}
  93
  94/* Interface functions */
  95
  96static u_char
  97ReadISAC(struct IsdnCardState *cs, u_char offset)
  98{
  99        return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
 100}
 101
 102static void
 103WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
 104{
 105        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset, value);
 106}
 107
 108static void
 109ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
 110{
 111        read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
 112}
 113
 114static void
 115WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
 116{
 117        write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
 118}
 119
 120static u_char
 121ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
 122{
 123        return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset));
 124}
 125
 126static void
 127WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 128{
 129        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset, value);
 130}
 131
 132/*
 133 * fast interrupt HSCX stuff goes here
 134 */
 135
 136#define READHSCX(cs, nr, reg) readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg)
 137#define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg, data)
 138#define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
 139#define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
 140
 141#include "hscx_irq.c"
 142
 143static irqreturn_t
 144s0box_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 145{
 146#define MAXCOUNT 5
 147        struct IsdnCardState *cs = dev_id;
 148        u_char val;
 149        u_long flags;
 150        int count = 0;
 151
 152        spin_lock_irqsave(&cs->lock, flags);
 153        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
 154      Start_HSCX:
 155        if (val)
 156                hscx_int_main(cs, val);
 157        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 158      Start_ISAC:
 159        if (val)
 160                isac_interrupt(cs, val);
 161        count++;
 162        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
 163        if (val && count < MAXCOUNT) {
 164                if (cs->debug & L1_DEB_HSCX)
 165                        debugl1(cs, "HSCX IntStat after IntRoutine");
 166                goto Start_HSCX;
 167        }
 168        val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 169        if (val && count < MAXCOUNT) {
 170                if (cs->debug & L1_DEB_ISAC)
 171                        debugl1(cs, "ISAC IntStat after IntRoutine");
 172                goto Start_ISAC;
 173        }
 174        if (count >= MAXCOUNT)
 175                printk(KERN_WARNING "S0Box: more than %d loops in s0box_interrupt\n", count);
 176        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0xFF);
 177        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0xFF);
 178        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0xFF);
 179        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0x0);
 180        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0x0);
 181        writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0x0);
 182        spin_unlock_irqrestore(&cs->lock, flags);
 183        return IRQ_HANDLED;
 184}
 185
 186void
 187release_io_s0box(struct IsdnCardState *cs)
 188{
 189        release_region(cs->hw.teles3.cfg_reg, 8);
 190}
 191
 192static int
 193S0Box_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 194{
 195        u_long flags;
 196
 197        switch (mt) {
 198                case CARD_RESET:
 199                        break;
 200                case CARD_RELEASE:
 201                        release_io_s0box(cs);
 202                        break;
 203                case CARD_INIT:
 204                        spin_lock_irqsave(&cs->lock, flags);
 205                        inithscxisac(cs, 3);
 206                        spin_unlock_irqrestore(&cs->lock, flags);
 207                        break;
 208                case CARD_TEST:
 209                        break;
 210        }
 211        return(0);
 212}
 213
 214int __init
 215setup_s0box(struct IsdnCard *card)
 216{
 217        struct IsdnCardState *cs = card->cs;
 218        char tmp[64];
 219
 220        strcpy(tmp, s0box_revision);
 221        printk(KERN_INFO "HiSax: S0Box IO driver Rev. %s\n", HiSax_getrev(tmp));
 222        if (cs->typ != ISDN_CTYPE_S0BOX)
 223                return (0);
 224
 225        cs->hw.teles3.cfg_reg = card->para[1];
 226        cs->hw.teles3.hscx[0] = -0x20;
 227        cs->hw.teles3.hscx[1] = 0x0;
 228        cs->hw.teles3.isac = 0x20;
 229        cs->hw.teles3.isacfifo = cs->hw.teles3.isac + 0x3e;
 230        cs->hw.teles3.hscxfifo[0] = cs->hw.teles3.hscx[0] + 0x3e;
 231        cs->hw.teles3.hscxfifo[1] = cs->hw.teles3.hscx[1] + 0x3e;
 232        cs->irq = card->para[0];
 233        if (!request_region(cs->hw.teles3.cfg_reg,8, "S0Box parallel I/O")) {
 234                printk(KERN_WARNING
 235                       "HiSax: %s ports %x-%x already in use\n",
 236                       CardType[cs->typ],
 237                       cs->hw.teles3.cfg_reg,
 238                       cs->hw.teles3.cfg_reg + 7);
 239                return 0;
 240        }
 241        printk(KERN_INFO
 242                "HiSax: %s config irq:%d isac:0x%x  cfg:0x%x\n",
 243                CardType[cs->typ], cs->irq,
 244                cs->hw.teles3.isac, cs->hw.teles3.cfg_reg);
 245        printk(KERN_INFO
 246                "HiSax: hscx A:0x%x  hscx B:0x%x\n",
 247                cs->hw.teles3.hscx[0], cs->hw.teles3.hscx[1]);
 248        setup_isac(cs);
 249        cs->readisac = &ReadISAC;
 250        cs->writeisac = &WriteISAC;
 251        cs->readisacfifo = &ReadISACfifo;
 252        cs->writeisacfifo = &WriteISACfifo;
 253        cs->BC_Read_Reg = &ReadHSCX;
 254        cs->BC_Write_Reg = &WriteHSCX;
 255        cs->BC_Send_Data = &hscx_fill_fifo;
 256        cs->cardmsg = &S0Box_card_msg;
 257        cs->irq_func = &s0box_interrupt;
 258        ISACVersion(cs, "S0Box:");
 259        if (HscxVersion(cs, "S0Box:")) {
 260                printk(KERN_WARNING
 261                       "S0Box: wrong HSCX versions check IO address\n");
 262                release_io_s0box(cs);
 263                return (0);
 264        }
 265        return (1);
 266}
 267