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   1 /* $Id: sportster.c,v 1.16.2.4 2004/01/13 23:48:39 keil Exp $
   2  *
   3  * low level stuff for USR Sportster internal TA
   4  *
   5  * Author       Karsten Keil
   6  * Copyright    by Karsten Keil      <keil@isdn4linux.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  * Thanks to Christian "naddy" Weisgerber (3Com, US Robotics) for documentation
  12  *
  13  *
  14  */
  15 #include <linux/init.h>
  16 #include "hisax.h"
  17 #include "isac.h"
  18 #include "hscx.h"
  19 #include "isdnl1.h"
  20
  21 static const char *sportster_revision = "$Revision: 1.16.2.4 $";
  22
  23 #define byteout(addr,val) outb(val,addr)
  24 #define bytein(addr) inb(addr)
  25
  26 #define  SPORTSTER_ISAC         0xC000
  27 #define  SPORTSTER_HSCXA        0x0000
  28 #define  SPORTSTER_HSCXB        0x4000
  29 #define  SPORTSTER_RES_IRQ      0x8000
  30 #define  SPORTSTER_RESET        0x80
  31 #define  SPORTSTER_INTE         0x40
  32
  33 static inline int
  34 calc_off(unsigned int base, unsigned int off)
  35 {
  36         return(base + ((off & 0xfc)<<8) + ((off & 3)<<1));
  37 }
  38
  39 static inline void
  40 read_fifo(unsigned int adr, u_char * data, int size)
  41 {
  42         insb(adr, data, size);
  43 }
  44
  45 static void
  46 write_fifo(unsigned int adr, u_char * data, int size)
  47 {
  48         outsb(adr, data, size);
  49 }
  50
  51 /* Interface functions */
  52
  53 static u_char
  54 ReadISAC(struct IsdnCardState *cs, u_char offset)
  55 {
  56         return (bytein(calc_off(cs->hw.spt.isac, offset)));
  57 }
  58
  59 static void
  60 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  61 {
  62         byteout(calc_off(cs->hw.spt.isac, offset), value);
  63 }
  64
  65 static void
  66 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  67 {
  68         read_fifo(cs->hw.spt.isac, data, size);
  69 }
  70
  71 static void
  72 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  73 {
  74         write_fifo(cs->hw.spt.isac, data, size);
  75 }
  76
  77 static u_char
  78 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
  79 {
  80         return (bytein(calc_off(cs->hw.spt.hscx[hscx], offset)));
  81 }
  82
  83 static void
  84 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
  85 {
  86         byteout(calc_off(cs->hw.spt.hscx[hscx], offset), value);
  87 }
  88
  89 /*
  90  * fast interrupt HSCX stuff goes here
  91  */
  92
  93 #define READHSCX(cs, nr, reg) bytein(calc_off(cs->hw.spt.hscx[nr], reg))
  94 #define WRITEHSCX(cs, nr, reg, data) byteout(calc_off(cs->hw.spt.hscx[nr], reg), data)
  95 #define READHSCXFIFO(cs, nr, ptr, cnt) read_fifo(cs->hw.spt.hscx[nr], ptr, cnt)
  96 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) write_fifo(cs->hw.spt.hscx[nr], ptr, cnt)
  97
  98 #include "hscx_irq.c"
  99
 100 static irqreturn_t
 101 sportster_interrupt(int intno, void *dev_id)
 102 {
 103         struct IsdnCardState *cs = dev_id;
 104         u_char val;
 105         u_long flags;
 106
 107         spin_lock_irqsave(&cs->lock, flags);
 108         val = READHSCX(cs, 1, HSCX_ISTA);
 109       Start_HSCX:
 110         if (val)
 111                 hscx_int_main(cs, val);
 112         val = ReadISAC(cs, ISAC_ISTA);
 113       Start_ISAC:
 114         if (val)
 115                 isac_interrupt(cs, val);
 116         val = READHSCX(cs, 1, HSCX_ISTA);
 117         if (val) {
 118                 if (cs->debug & L1_DEB_HSCX)
 119                         debugl1(cs, "HSCX IntStat after IntRoutine");
 120                 goto Start_HSCX;
 121         }
 122         val = ReadISAC(cs, ISAC_ISTA);
 123         if (val) {
 124                 if (cs->debug & L1_DEB_ISAC)
 125                         debugl1(cs, "ISAC IntStat after IntRoutine");
 126                 goto Start_ISAC;
 127         }
 128         /* get a new irq impulse if there any pending */
 129         bytein(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ +1);
 130         spin_unlock_irqrestore(&cs->lock, flags);
 131         return IRQ_HANDLED;
 132 }
 133
 134 static void
 135 release_io_sportster(struct IsdnCardState *cs)
 136 {
 137         int i, adr;
 138
 139         byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, 0);
 140         for (i=0; i<64; i++) {
 141                 adr = cs->hw.spt.cfg_reg + i *1024;
 142                 release_region(adr, 8);
 143         }
 144 }
 145
 146 static void
 147 reset_sportster(struct IsdnCardState *cs)
 148 {
 149         cs->hw.spt.res_irq |= SPORTSTER_RESET; /* Reset On */
 150         byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
 151         mdelay(10);
 152         cs->hw.spt.res_irq &= ~SPORTSTER_RESET; /* Reset Off */
 153         byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
 154         mdelay(10);
 155 }
 156
 157 static int
 158 Sportster_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 159 {
 160         u_long flags;
 161
 162         switch (mt) {
 163                 case CARD_RESET:
 164                         spin_lock_irqsave(&cs->lock, flags);
 165                         reset_sportster(cs);
 166                         spin_unlock_irqrestore(&cs->lock, flags);
 167                         return(0);
 168                 case CARD_RELEASE:
 169                         release_io_sportster(cs);
 170                         return(0);
 171                 case CARD_INIT:
 172                         spin_lock_irqsave(&cs->lock, flags);
 173                         reset_sportster(cs);
 174                         inithscxisac(cs, 1);
 175                         cs->hw.spt.res_irq |= SPORTSTER_INTE; /* IRQ On */
 176                         byteout(cs->hw.spt.cfg_reg + SPORTSTER_RES_IRQ, cs->hw.spt.res_irq);
 177                         inithscxisac(cs, 2);
 178                         spin_unlock_irqrestore(&cs->lock, flags);
 179                         return(0);
 180                 case CARD_TEST:
 181                         return(0);
 182         }
 183         return(0);
 184 }
 185
 186 static int __devinit
 187 get_io_range(struct IsdnCardState *cs)
 188 {
 189         int i, j, adr;
 190
 191         for (i=0;i<64;i++) {
 192                 adr = cs->hw.spt.cfg_reg + i *1024;
 193                 if (!request_region(adr, 8, "sportster")) {
 194                         printk(KERN_WARNING "HiSax: USR Sportster config port "
 195                                 "%x-%x already in use\n",
 196                                 adr, adr + 8);
 197                         break;
 198                 }
 199         }
 200         if (i==64)
 201                 return(1);
 202         else {
 203                 for (j=0; j<i; j++) {
 204                         adr = cs->hw.spt.cfg_reg + j *1024;
 205                         release_region(adr, 8);
 206                 }
 207                 return(0);
 208         }
 209 }
 210
 211 int __devinit
 212 setup_sportster(struct IsdnCard *card)
 213 {
 214         struct IsdnCardState *cs = card->cs;
 215         char tmp[64];
 216
 217         strcpy(tmp, sportster_revision);
 218         printk(KERN_INFO "HiSax: USR Sportster driver Rev. %s\n", HiSax_getrev(tmp));
 219         if (cs->typ != ISDN_CTYPE_SPORTSTER)
 220                 return (0);
 221
 222         cs->hw.spt.cfg_reg = card->para[1];
 223         cs->irq = card->para[0];
 224         if (!get_io_range(cs))
 225                 return (0);
 226         cs->hw.spt.isac = cs->hw.spt.cfg_reg + SPORTSTER_ISAC;
 227         cs->hw.spt.hscx[0] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXA;
 228         cs->hw.spt.hscx[1] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXB;
 229
 230         switch(cs->irq) {
 231                 case 5: cs->hw.spt.res_irq = 1;
 232                         break;
 233                 case 7: cs->hw.spt.res_irq = 2;
 234                         break;
 235                 case 10:cs->hw.spt.res_irq = 3;
 236                         break;
 237                 case 11:cs->hw.spt.res_irq = 4;
 238                         break;
 239                 case 12:cs->hw.spt.res_irq = 5;
 240                         break;
 241                 case 14:cs->hw.spt.res_irq = 6;
 242                         break;
 243                 case 15:cs->hw.spt.res_irq = 7;
 244                         break;
 245                 default:release_io_sportster(cs);
 246                         printk(KERN_WARNING "Sportster: wrong IRQ\n");
 247                         return(0);
 248         }
 249         printk(KERN_INFO "HiSax: USR Sportster config irq:%d cfg:0x%X\n",
 250                 cs->irq, cs->hw.spt.cfg_reg);
 251         setup_isac(cs);
 252         cs->readisac = &ReadISAC;
 253         cs->writeisac = &WriteISAC;
 254         cs->readisacfifo = &ReadISACfifo;
 255         cs->writeisacfifo = &WriteISACfifo;
 256         cs->BC_Read_Reg = &ReadHSCX;
 257         cs->BC_Write_Reg = &WriteHSCX;
 258         cs->BC_Send_Data = &hscx_fill_fifo;
 259         cs->cardmsg = &Sportster_card_msg;
 260         cs->irq_func = &sportster_interrupt;
 261         ISACVersion(cs, "Sportster:");
 262         if (HscxVersion(cs, "Sportster:")) {
 263                 printk(KERN_WARNING
 264                        "Sportster: wrong HSCX versions check IO address\n");
 265                 release_io_sportster(cs);
 266                 return (0);
 267         }
 268         return (1);
 269 }