kernel/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 static const char *s0box_revision = "$Revision: 2.6.2.4 $";
  20
  21 static inline void
  22 writereg(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
  33 static 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
  37 static inline u_char
  38 readreg(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
  54 static inline void
  55 read_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
  76 static inline void
  77 write_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
  95 static u_char
  96 ReadISAC(struct IsdnCardState *cs, u_char offset)
  97 {
  98         return (readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, offset));
  99 }
 100
 101 static void
 102 WriteISAC(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
 107 static void
 108 ReadISACfifo(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
 113 static void
 114 WriteISACfifo(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
 119 static u_char
 120 ReadHSCX(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
 125 static void
 126 WriteHSCX(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
 142 static irqreturn_t
 143 s0box_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);
 153 Start_HSCX:
 154         if (val)
 155                 hscx_int_main(cs, val);
 156         val = readreg(cs->hw.teles3.cfg_reg, cs->hw.teles3.isac, ISAC_ISTA);
 157 Start_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
 185 static void
 186 release_io_s0box(struct IsdnCardState *cs)
 187 {
 188         release_region(cs->hw.teles3.cfg_reg, 8);
 189 }
 190
 191 static int
 192 S0Box_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
 213 int 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 }