kernel/drivers/isdn/hisax/sportster.c

   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 get_io_range(struct IsdnCardState *cs)
 187 {
 188         int i, j, adr;
 189
 190         for (i = 0; i < 64; i++) {
 191                 adr = cs->hw.spt.cfg_reg + i * 1024;
 192                 if (!request_region(adr, 8, "sportster")) {
 193                         printk(KERN_WARNING "HiSax: USR Sportster config port "
 194                                "%x-%x already in use\n",
 195                                adr, adr + 8);
 196                         break;
 197                 }
 198         }
 199         if (i == 64)
 200                 return (1);
 201         else {
 202                 for (j = 0; j < i; j++) {
 203                         adr = cs->hw.spt.cfg_reg + j * 1024;
 204                         release_region(adr, 8);
 205                 }
 206                 return (0);
 207         }
 208 }
 209
 210 int setup_sportster(struct IsdnCard *card)
 211 {
 212         struct IsdnCardState *cs = card->cs;
 213         char tmp[64];
 214
 215         strcpy(tmp, sportster_revision);
 216         printk(KERN_INFO "HiSax: USR Sportster driver Rev. %s\n", HiSax_getrev(tmp));
 217         if (cs->typ != ISDN_CTYPE_SPORTSTER)
 218                 return (0);
 219
 220         cs->hw.spt.cfg_reg = card->para[1];
 221         cs->irq = card->para[0];
 222         if (!get_io_range(cs))
 223                 return (0);
 224         cs->hw.spt.isac = cs->hw.spt.cfg_reg + SPORTSTER_ISAC;
 225         cs->hw.spt.hscx[0] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXA;
 226         cs->hw.spt.hscx[1] = cs->hw.spt.cfg_reg + SPORTSTER_HSCXB;
 227
 228         switch (cs->irq) {
 229         case 5: cs->hw.spt.res_irq = 1;
 230                 break;
 231         case 7: cs->hw.spt.res_irq = 2;
 232                 break;
 233         case 10:cs->hw.spt.res_irq = 3;
 234                 break;
 235         case 11:cs->hw.spt.res_irq = 4;
 236                 break;
 237         case 12:cs->hw.spt.res_irq = 5;
 238                 break;
 239         case 14:cs->hw.spt.res_irq = 6;
 240                 break;
 241         case 15:cs->hw.spt.res_irq = 7;
 242                 break;
 243         default:release_io_sportster(cs);
 244                 printk(KERN_WARNING "Sportster: wrong IRQ\n");
 245                 return (0);
 246         }
 247         printk(KERN_INFO "HiSax: USR Sportster config irq:%d cfg:0x%X\n",
 248                cs->irq, cs->hw.spt.cfg_reg);
 249         setup_isac(cs);
 250         cs->readisac = &ReadISAC;
 251         cs->writeisac = &WriteISAC;
 252         cs->readisacfifo = &ReadISACfifo;
 253         cs->writeisacfifo = &WriteISACfifo;
 254         cs->BC_Read_Reg = &ReadHSCX;
 255         cs->BC_Write_Reg = &WriteHSCX;
 256         cs->BC_Send_Data = &hscx_fill_fifo;
 257         cs->cardmsg = &Sportster_card_msg;
 258         cs->irq_func = &sportster_interrupt;
 259         ISACVersion(cs, "Sportster:");
 260         if (HscxVersion(cs, "Sportster:")) {
 261                 printk(KERN_WARNING
 262                        "Sportster: wrong HSCX versions check IO address\n");
 263                 release_io_sportster(cs);
 264                 return (0);
 265         }
 266         return (1);
 267 }