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 extern const char *CardType[];
  20
  21 static const char *mic_revision = "$Revision: 1.12.2.4 $";
  22
  23 #define byteout(addr,val) outb(val,addr)
  24 #define bytein(addr) inb(addr)
  25
  26 #define MIC_ISAC        2
  27 #define MIC_HSCX        1
  28 #define MIC_ADR         7
  29
  30 /* CARD_ADR (Write) */
  31 #define MIC_RESET      0x3      /* same as DOS driver */
  32
  33 static inline u_char
  34 readreg(unsigned int ale, unsigned int adr, u_char off)
  35 {
  36         register u_char ret;
  37
  38         byteout(ale, off);
  39         ret = bytein(adr);
  40         return (ret);
  41 }
  42
  43 static inline void
  44 readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
  45 {
  46         byteout(ale, off);
  47         insb(adr, data, size);
  48 }
  49
  50
  51 static inline void
  52 writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
  53 {
  54         byteout(ale, off);
  55         byteout(adr, data);
  56 }
  57
  58 static inline void
  59 writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
  60 {
  61         byteout(ale, off);
  62         outsb(adr, data, size);
  63 }
  64
  65 /* Interface functions */
  66
  67 static u_char
  68 ReadISAC(struct IsdnCardState *cs, u_char offset)
  69 {
  70         return (readreg(cs->hw.mic.adr, cs->hw.mic.isac, offset));
  71 }
  72
  73 static void
  74 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  75 {
  76         writereg(cs->hw.mic.adr, cs->hw.mic.isac, offset, value);
  77 }
  78
  79 static void
  80 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  81 {
  82         readfifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
  83 }
  84
  85 static void
  86 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  87 {
  88         writefifo(cs->hw.mic.adr, cs->hw.mic.isac, 0, data, size);
  89 }
  90
  91 static u_char
  92 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  93 {
  94         return (readreg(cs->hw.mic.adr,
  95                         cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0)));
  96 }
  97
  98 static void
  99 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 100 {
 101         writereg(cs->hw.mic.adr,
 102                  cs->hw.mic.hscx, offset + (hscx ? 0x40 : 0), value);
 103 }
 104
 105 /*
 106  * fast interrupt HSCX stuff goes here
 107  */
 108
 109 #define READHSCX(cs, nr, reg) readreg(cs->hw.mic.adr, \
 110                 cs->hw.mic.hscx, reg + (nr ? 0x40 : 0))
 111 #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.mic.adr, \
 112                 cs->hw.mic.hscx, reg + (nr ? 0x40 : 0), data)
 113
 114 #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.mic.adr, \
 115                 cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)
 116
 117 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.mic.adr, \
 118                 cs->hw.mic.hscx, (nr ? 0x40 : 0), ptr, cnt)
 119
 120 #include "hscx_irq.c"
 121
 122 static irqreturn_t
 123 mic_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 124 {
 125         struct IsdnCardState *cs = dev_id;
 126         u_char val;
 127         u_long flags;
 128
 129         spin_lock_irqsave(&cs->lock, flags);
 130         val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
 131       Start_HSCX:
 132         if (val)
 133                 hscx_int_main(cs, val);
 134         val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
 135       Start_ISAC:
 136         if (val)
 137                 isac_interrupt(cs, val);
 138         val = readreg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_ISTA + 0x40);
 139         if (val) {
 140                 if (cs->debug & L1_DEB_HSCX)
 141                         debugl1(cs, "HSCX IntStat after IntRoutine");
 142                 goto Start_HSCX;
 143         }
 144         val = readreg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_ISTA);
 145         if (val) {
 146                 if (cs->debug & L1_DEB_ISAC)
 147                         debugl1(cs, "ISAC IntStat after IntRoutine");
 148                 goto Start_ISAC;
 149         }
 150         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0xFF);
 151         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0xFF);
 152         writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0xFF);
 153         writereg(cs->hw.mic.adr, cs->hw.mic.isac, ISAC_MASK, 0x0);
 154         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK, 0x0);
 155         writereg(cs->hw.mic.adr, cs->hw.mic.hscx, HSCX_MASK + 0x40, 0x0);
 156         spin_unlock_irqrestore(&cs->lock, flags);
 157         return IRQ_HANDLED;
 158 }
 159
 160 static void
 161 release_io_mic(struct IsdnCardState *cs)
 162 {
 163         int bytecnt = 8;
 164
 165         if (cs->hw.mic.cfg_reg)
 166                 release_region(cs->hw.mic.cfg_reg, bytecnt);
 167 }
 168
 169 static int
 170 mic_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 171 {
 172         u_long flags;
 173
 174         switch (mt) {
 175                 case CARD_RESET:
 176                         return(0);
 177                 case CARD_RELEASE:
 178                         release_io_mic(cs);
 179                         return(0);
 180                 case CARD_INIT:
 181                         spin_lock_irqsave(&cs->lock, flags);
 182                         inithscx(cs); /* /RTSA := ISAC RST */
 183                         inithscxisac(cs, 3);
 184                         spin_unlock_irqrestore(&cs->lock, flags);
 185                         return(0);
 186                 case CARD_TEST:
 187                         return(0);
 188         }
 189         return(0);
 190 }
 191
 192 int __init
 193 setup_mic(struct IsdnCard *card)
 194 {
 195         int bytecnt;
 196         struct IsdnCardState *cs = card->cs;
 197         char tmp[64];
 198
 199         strcpy(tmp, mic_revision);
 200         printk(KERN_INFO "HiSax: mic driver Rev. %s\n", HiSax_getrev(tmp));
 201         if (cs->typ != ISDN_CTYPE_MIC)
 202                 return (0);
 203
 204         bytecnt = 8;
 205         cs->hw.mic.cfg_reg = card->para[1];
 206         cs->irq = card->para[0];
 207         cs->hw.mic.adr = cs->hw.mic.cfg_reg + MIC_ADR;
 208         cs->hw.mic.isac = cs->hw.mic.cfg_reg + MIC_ISAC;
 209         cs->hw.mic.hscx = cs->hw.mic.cfg_reg + MIC_HSCX;
 210
 211         if (!request_region(cs->hw.mic.cfg_reg, bytecnt, "mic isdn")) {
 212                 printk(KERN_WARNING
 213                        "HiSax: %s config port %x-%x already in use\n",
 214                        CardType[card->typ],
 215                        cs->hw.mic.cfg_reg,
 216                        cs->hw.mic.cfg_reg + bytecnt);
 217                 return (0);
 218         }
 219         printk(KERN_INFO "mic: defined at 0x%x IRQ %d\n",
 220                 cs->hw.mic.cfg_reg, cs->irq);
 221         setup_isac(cs);
 222         cs->readisac = &ReadISAC;
 223         cs->writeisac = &WriteISAC;
 224         cs->readisacfifo = &ReadISACfifo;
 225         cs->writeisacfifo = &WriteISACfifo;
 226         cs->BC_Read_Reg = &ReadHSCX;
 227         cs->BC_Write_Reg = &WriteHSCX;
 228         cs->BC_Send_Data = &hscx_fill_fifo;
 229         cs->cardmsg = &mic_card_msg;
 230         cs->irq_func = &mic_interrupt;
 231         ISACVersion(cs, "mic:");
 232         if (HscxVersion(cs, "mic:")) {
 233                 printk(KERN_WARNING
 234                     "mic: wrong HSCX versions check IO address\n");
 235                 release_io_mic(cs);
 236                 return (0);
 237         }
 238         return (1);
 239 }