drivers/isdn/hisax/mic.c

   1 /* $Id: mic.c,v 1.12.2.4 2004/01/13 23:48:39 keil Exp $
   2  *
   3  * low level stuff for mic cards
   4  *
   5  * Author       Stephan von Krawczynski
   6  * Copyright    by Stephan von Krawczynski <skraw@ithnet.com>
   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 *mic_revision = "$Revision: 1.12.2.4 $";
  20
  21 #define byteout(addr, val) outb(val, addr)
  22 #define bytein(addr) inb(addr)
  23
  24 #define MIC_ISAC        2
  25 #define MIC_HSCX        1
  26 #define MIC_ADR         7
  27
  28 /* CARD_ADR (Write) */
  29 #define MIC_RESET      0x3      /* same as DOS driver */
  30
  31 static inline u_char
  32 readreg(unsigned int ale, unsigned int adr, u_char off)
  33 {
  34         register u_char ret;
  35
  36         byteout(ale, off);
  37         ret = bytein(adr);
  38         return (ret);
  39 }
  40
  41 static inline void
  42 readfifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
  43 {
  44         byteout(ale, off);
  45         insb(adr, data, size);
  46 }
  47
  48
  49 static inline void
  50 writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
  51 {
  52         byteout(ale, off);
  53         byteout(adr, data);
  54 }
  55
  56 static inline void
  57 writefifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
  58 {
  59         byteout(ale, off);
  60         outsb(adr, data, size);
  61 }
  62
  63 /* Interface functions */
  64
  65 static u_char
  66 ReadISAC(struct IsdnCardState *cs, u_char offset)
  67 {
  68         return (readreg(cs->hw.mic.adr, cs->hw.mic.isac, offset));
  69 }
  70
  71 static void
  72 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  73 {
  74         writereg(cs->hw.mic.adr, cs->hw.mic.isac, offset, value);
  75 }
  76
  77 static void
  78 ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  79 {
  80         readfifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
  81 }
  82
  83 static void
  84 WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  85 {
  86         writefifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
  87 }
  88
  89 static u_char
  90 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  91 {
  92         return (readreg(cs->hw.mic.adr,
  93                         cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0)));
  94 }
  95
  96 static void
  97 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  98 {
  99         writereg(cs->hw.mic.adr,
 100                  cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0), value);
 101 }
 102
 103 /*
 104  * fast interrupt HSCX stuff goes here
 105  */
 106
 107 #define READHSCX(cs, nr, reg) readreg(cs->hw.mic.adr,                   \
 108                                       cs->hw.mic.hscx, reg + (nr ? 0x40 : 0))
 109 #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.mic.adr,           \
 110                                               cs->hw.mic.hscx, reg + (nr ? 0x40 : 0), data)
 111
 112 #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.mic.adr,         \
 113                                                 cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)
 114
 115 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.mic.adr,       \
 116                                                   cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)
 117
 118 #include "hscx_irq.c"
 119
 120 static irqreturn_t
 121 mic_interrupt(int intno, void *dev_id)
 122 {
 123         struct IsdnCardState *cs = dev_id;
 124         u_char val;
 125         u_long flags;
 126
 127         spin_lock_irqsave(&cs->lock, flags);
 128         val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
 129 Start_HSCX:
 130         if (val)
 131                 hscx_int_main(cs, val);
 132         val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
 133 Start_ISAC:
 134         if (val)
 135                 isac_interrupt(cs, val);
 136         val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
 137         if (val) {
 138                 if (cs->debug & L1_DEB_HSCX)
 139                         debugl1(cs, "HSCX IntStat after IntRoutine");
 140                 goto Start_HSCX;
 141         }
 142         val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
 143         if (val) {
 144                 if (cs->debug & L1_DEB_ISAC)
 145                         debugl1(cs, "ISAC IntStat after IntRoutine");
 146                 goto Start_ISAC;
 147         }
 148         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0xFF);
 149         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0xFF);
 150         writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0xFF);
 151         writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0x0);
 152         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0x0);
 153         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0x0);
 154         spin_unlock_irqrestore(&cs->lock, flags);
 155         return IRQ_HANDLED;
 156 }
 157
 158 static void
 159 release_io_mic(struct IsdnCardState *cs)
 160 {
 161         int bytecnt = 8;
 162
 163         if (cs->hw.mic.cfg_reg)
 164                 release_region(cs->hw.mic.cfg_reg, bytecnt);
 165 }
 166
 167 static int
 168 mic_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 169 {
 170         u_long flags;
 171
 172         switch (mt) {
 173         case CARD_RESET:
 174                 return (0);
 175         case CARD_RELEASE:
 176                 release_io_mic(cs);
 177                 return (0);
 178         case CARD_INIT:
 179                 spin_lock_irqsave(&cs->lock, flags);
 180                 inithscx(cs); /* /RTSA := ISAC RST */
 181                 inithscxisac(cs, 3);
 182                 spin_unlock_irqrestore(&cs->lock, flags);
 183                 return (0);
 184         case CARD_TEST:
 185                 return (0);
 186         }
 187         return (0);
 188 }
 189
 190 int __devinit
 191 setup_mic(struct IsdnCard *card)
 192 {
 193         int bytecnt;
 194         struct IsdnCardState *cs = card->cs;
 195         char tmp[64];
 196
 197         strcpy(tmp, mic_revision);
 198         printk(KERN_INFO "HiSax: mic driver Rev. %s\n", HiSax_getrev(tmp));
 199         if (cs->typ != ISDN_CTYPE_MIC)
 200                 return (0);
 201
 202         bytecnt = 8;
 203         cs->hw.mic.cfg_reg = card->para[1];
 204         cs->irq = card->para[0];
 205         cs->hw.mic.adr = cs->hw.mic.cfg_reg + MIC_ADR;
 206         cs->hw.mic.isac = cs->hw.mic.cfg_reg + MIC_ISAC;
 207         cs->hw.mic.hscx = cs->hw.mic.cfg_reg + MIC_HSCX;
 208
 209         if (!request_region(cs->hw.mic.cfg_reg, bytecnt, "mic isdn")) {
 210                 printk(KERN_WARNING
 211                        "HiSax: ith mic config port %x-%x already in use\n",
 212                        cs->hw.mic.cfg_reg,
 213                        cs->hw.mic.cfg_reg + bytecnt);
 214                 return (0);
 215         }
 216         printk(KERN_INFO "mic: defined at 0x%x IRQ %d\n",
 217                cs->hw.mic.cfg_reg, cs->irq);
 218         setup_isac(cs);
 219         cs->readisac = &ReadISAC;
 220         cs->writeisac = &WriteISAC;
 221         cs->readisacfifo = &ReadISACfifo;
 222         cs->writeisacfifo = &WriteISACfifo;
 223         cs->BC_Read_Reg = &ReadHSCX;
 224         cs->BC_Write_Reg = &WriteHSCX;
 225         cs->BC_Send_Data = &hscx_fill_fifo;
 226         cs->cardmsg = &mic_card_msg;
 227         cs->irq_func = &mic_interrupt;
 228         ISACVersion(cs, "mic:");
 229         if (HscxVersion(cs, "mic:")) {
 230                 printk(KERN_WARNING
 231                        "mic: wrong HSCX versions check IO address\n");
 232                 release_io_mic(cs);
 233                 return (0);
 234         }
 235         return (1);
 236 }