drivers/isdn/hisax/s0box.c

   1 /* $Id: s0box.c,v 1.1.4.1 2001/11/20 14:19:36 kai 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 #define __NO_VERSION__
  14 #include <linux/init.h>
  15 #include "hisax.h"
  16 #include "isac.h"
  17 #include "hscx.h"
  18 #include "isdnl1.h"
  19
  20 extern const char *CardType[];
  21 const char *s0box_revision = "$Revision: 1.1.4.1 $";
  22
  23 static inline void
  24 writereg(unsigned int padr, signed int addr, u_char off, u_char val) {
  25         unsigned long flags;
  26
  27         save_flags(flags);
  28         cli();
  29         outb_p(0x1c,padr+2);
  30         outb_p(0x14,padr+2);
  31         outb_p((addr+off)&0x7f,padr);
  32         outb_p(0x16,padr+2);
  33         outb_p(val,padr);
  34         outb_p(0x17,padr+2);
  35         outb_p(0x14,padr+2);
  36         outb_p(0x1c,padr+2);
  37         restore_flags(flags);
  38 }
  39
  40 static u_char nibtab[] = { 1, 9, 5, 0xd, 3, 0xb, 7, 0xf,
  41                          0, 0, 0, 0, 0, 0, 0, 0,
  42                          0, 8, 4, 0xc, 2, 0xa, 6, 0xe } ;
  43
  44 static inline u_char
  45 readreg(unsigned int padr, signed int addr, u_char off) {
  46         register u_char n1, n2;
  47         unsigned long flags;
  48
  49         save_flags(flags);
  50         cli();
  51         outb_p(0x1c,padr+2);
  52         outb_p(0x14,padr+2);
  53         outb_p((addr+off)|0x80,padr);
  54         outb_p(0x16,padr+2);
  55         outb_p(0x17,padr+2);
  56         n1 = (inb_p(padr+1) >> 3) & 0x17;
  57         outb_p(0x16,padr+2);
  58         n2 = (inb_p(padr+1) >> 3) & 0x17;
  59         outb_p(0x14,padr+2);
  60         outb_p(0x1c,padr+2);
  61         restore_flags(flags);
  62         return nibtab[n1] | (nibtab[n2] << 4);
  63 }
  64
  65 static inline void
  66 read_fifo(unsigned int padr, signed int adr, u_char * data, int size)
  67 {
  68         int i;
  69         register u_char n1, n2;
  70
  71         outb_p(0x1c, padr+2);
  72         outb_p(0x14, padr+2);
  73         outb_p(adr|0x80, padr);
  74         outb_p(0x16, padr+2);
  75         for (i=0; i<size; i++) {
  76                 outb_p(0x17, padr+2);
  77                 n1 = (inb_p(padr+1) >> 3) & 0x17;
  78                 outb_p(0x16,padr+2);
  79                 n2 = (inb_p(padr+1) >> 3) & 0x17;
  80                 *(data++)=nibtab[n1] | (nibtab[n2] << 4);
  81         }
  82         outb_p(0x14,padr+2);
  83         outb_p(0x1c,padr+2);
  84         return;
  85 }
  86
  87 static inline void
  88 write_fifo(unsigned int padr, signed int adr, u_char * data, int size)
  89 {
  90         int i;
  91         outb_p(0x1c, padr+2);
  92         outb_p(0x14, padr+2);
  93         outb_p(adr&0x7f, padr);
  94         for (i=0; i<size; i++) {
  95                 outb_p(0x16, padr+2);
  96                 outb_p(*(data++), padr);
  97                 outb_p(0x17, padr+2);
  98         }
  99         outb_p(0x14,padr+2);
 100         outb_p(0x1c,padr+2);
 101         return;
 102 }
 103
 104 /* Interface functions */
 105
 106 static u_char
 107 ReadISAC(struct IsdnCardState *cs, u_char offset)
 108 {
 109         return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
 110 }
 111
 112 static void
 113 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
 114 {
 115         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset, value);
 116 }
 117
 118 static void
 119 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
 120 {
 121         read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
 122 }
 123
 124 static void
 125 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
 126 {
 127         write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.isacfifo, data, size);
 128 }
 129
 130 static u_char
 131 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
 132 {
 133         return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset));
 134 }
 135
 136 static void
 137 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 138 {
 139         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[hscx], offset, value);
 140 }
 141
 142 /*
 143  * fast interrupt HSCX stuff goes here
 144  */
 145
 146 #define READHSCX(cs, nr, reg) readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg)
 147 #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[nr], reg, data)
 148 #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
 149 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscxfifo[nr], ptr, cnt)
 150
 151 #include "hscx_irq.c"
 152
 153 static void
 154 s0box_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 155 {
 156 #define MAXCOUNT 5
 157         struct IsdnCardState *cs = dev_id;
 158         u_char val;
 159         int count = 0;
 160
 161         if (!cs) {
 162                 printk(KERN_WARNING "Teles: Spurious interrupt!\n");
 163                 return;
 164         }
 165         val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
 166       Start_HSCX:
 167         if (val)
 168                 hscx_int_main(cs, val);
 169         val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 170       Start_ISAC:
 171         if (val)
 172                 isac_interrupt(cs, val);
 173         count++;
 174         val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_ISTA);
 175         if (val && count < MAXCOUNT) {
 176                 if (cs->debug & L1_DEB_HSCX)
 177                         debugl1(cs, "HSCX IntStat after IntRoutine");
 178                 goto Start_HSCX;
 179         }
 180         val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 181         if (val && count < MAXCOUNT) {
 182                 if (cs->debug & L1_DEB_ISAC)
 183                         debugl1(cs, "ISAC IntStat after IntRoutine");
 184                 goto Start_ISAC;
 185         }
 186         if (count >= MAXCOUNT)
 187                 printk(KERN_WARNING "S0Box: more than %d loops in s0box_interrupt\n", count);
 188         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0xFF);
 189         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0xFF);
 190         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0xFF);
 191         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_MASK, 0x0);
 192         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[0], HSCX_MASK, 0x0);
 193         writereg(cs->hw.teles3.cfg_reg, cs->hw.teles3.hscx[1], HSCX_MASK, 0x0);
 194 }
 195
 196 void
 197 release_io_s0box(struct IsdnCardState *cs)
 198 {
 199         release_region(cs->hw.teles3.cfg_reg, 8);
 200 }
 201
 202 static int
 203 S0Box_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 204 {
 205         switch (mt) {
 206                 case CARD_RESET:
 207                         break;
 208                 case CARD_RELEASE:
 209                         release_io_s0box(cs);
 210                         break;
 211                 case CARD_INIT:
 212                         inithscxisac(cs, 3);
 213                         break;
 214                 case CARD_TEST:
 215                         break;
 216         }
 217         return(0);
 218 }
 219
 220 int __init
 221 setup_s0box(struct IsdnCard *card)
 222 {
 223         struct IsdnCardState *cs = card->cs;
 224         char tmp[64];
 225
 226         strcpy(tmp, s0box_revision);
 227         printk(KERN_INFO "HiSax: S0Box IO driver Rev. %s\n", HiSax_getrev(tmp));
 228         if (cs->typ != ISDN_CTYPE_S0BOX)
 229                 return (0);
 230
 231         cs->hw.teles3.cfg_reg = card->para[1];
 232         cs->hw.teles3.hscx[0] = -0x20;
 233         cs->hw.teles3.hscx[1] = 0x0;
 234         cs->hw.teles3.isac = 0x20;
 235         cs->hw.teles3.isacfifo = cs->hw.teles3.isac + 0x3e;
 236         cs->hw.teles3.hscxfifo[0] = cs->hw.teles3.hscx[0] + 0x3e;
 237         cs->hw.teles3.hscxfifo[1] = cs->hw.teles3.hscx[1] + 0x3e;
 238         cs->irq = card->para[0];
 239         if (check_region(cs->hw.teles3.cfg_reg,8)) {
 240                 printk(KERN_WARNING
 241                        "HiSax: %s ports %x-%x already in use\n",
 242                        CardType[cs->typ],
 243                        cs->hw.teles3.cfg_reg,
 244                        cs->hw.teles3.cfg_reg + 7);
 245                 return 0;
 246         } else
 247                 request_region(cs->hw.teles3.cfg_reg, 8, "S0Box parallel I/O");
 248         printk(KERN_INFO
 249                "HiSax: %s config irq:%d isac:0x%x  cfg:0x%x\n",
 250                CardType[cs->typ], cs->irq,
 251                cs->hw.teles3.isac, cs->hw.teles3.cfg_reg);
 252         printk(KERN_INFO
 253                "HiSax: hscx A:0x%x  hscx B:0x%x\n",
 254                cs->hw.teles3.hscx[0], cs->hw.teles3.hscx[1]);
 255         cs->readisac = &ReadISAC;
 256         cs->writeisac = &WriteISAC;
 257         cs->readisacfifo = &ReadISACfifo;
 258         cs->writeisacfifo = &WriteISACfifo;
 259         cs->BC_Read_Reg = &ReadHSCX;
 260         cs->BC_Write_Reg = &WriteHSCX;
 261         cs->BC_Send_Data = &hscx_fill_fifo;
 262         cs->cardmsg = &S0Box_card_msg;
 263         cs->irq_func = &s0box_interrupt;
 264         ISACVersion(cs, "S0Box:");
 265         if (HscxVersion(cs, "S0Box:")) {
 266                 printk(KERN_WARNING
 267                        "S0Box: wrong HSCX versions check IO address\n");
 268                 release_io_s0box(cs);
 269                 return (0);
 270         }
 271         return (1);
 272 }