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
  19 extern const char *CardType[];
  20 static const char *s0box_revision = "$Revision: 2.6.2.4 $";
  21
  22 static inline void
  23 writereg(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
  34 static 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
  38 static inline u_char
  39 readreg(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
  55 static inline void
  56 read_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
  77 static inline void
  78 write_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
  96 static u_char
  97 ReadISAC(struct IsdnCardState *cs, u_char offset)
  98 {
  99         return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
 100 }
 101
 102 static void
 103 WriteISAC(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
 108 static void
 109 ReadISACfifo(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
 114 static void
 115 WriteISACfifo(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
 120 static u_char
 121 ReadHSCX(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
 126 static void
 127 WriteHSCX(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
 143 static irqreturn_t
 144 s0box_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
 186 static void
 187 release_io_s0box(struct IsdnCardState *cs)
 188 {
 189         release_region(cs->hw.teles3.cfg_reg, 8);
 190 }
 191
 192 static int
 193 S0Box_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
 214 int __init
 215 setup_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 }