drivers/isdn/hisax/isurf.c

   1 /* $Id: isurf.c,v 1.12.2.4 2004/01/13 21:46:03 keil Exp $
   2  *
   3  * low level stuff for Siemens I-Surf/I-Talk cards
   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  */
  12
  13 #include <linux/init.h>
  14 #include "hisax.h"
  15 #include "isac.h"
  16 #include "isar.h"
  17 #include "isdnl1.h"
  18 #include <linux/isapnp.h>
  19
  20 extern const char *CardType[];
  21
  22 static const char *ISurf_revision = "$Revision: 1.12.2.4 $";
  23
  24 #define byteout(addr,val) outb(val,addr)
  25 #define bytein(addr) inb(addr)
  26
  27 #define ISURF_ISAR_RESET        1
  28 #define ISURF_ISAC_RESET        2
  29 #define ISURF_ISAR_EA           4
  30 #define ISURF_ARCOFI_RESET      8
  31 #define ISURF_RESET (ISURF_ISAR_RESET | ISURF_ISAC_RESET | ISURF_ARCOFI_RESET)
  32
  33 #define ISURF_ISAR_OFFSET       0
  34 #define ISURF_ISAC_OFFSET       0x100
  35 #define ISURF_IOMEM_SIZE        0x400
  36 /* Interface functions */
  37
  38 static u_char
  39 ReadISAC(struct IsdnCardState *cs, u_char offset)
  40 {
  41         return (readb(cs->hw.isurf.isac + offset));
  42 }
  43
  44 static void
  45 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  46 {
  47         writeb(value, cs->hw.isurf.isac + offset); mb();
  48 }
  49
  50 static void
  51 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  52 {
  53         register int i;
  54         for (i = 0; i < size; i++)
  55                 data[i] = readb(cs->hw.isurf.isac);
  56 }
  57
  58 static void
  59 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  60 {
  61         register int i;
  62         for (i = 0; i < size; i++){
  63                 writeb(data[i], cs->hw.isurf.isac);mb();
  64         }
  65 }
  66
  67 /* ISAR access routines
  68  * mode = 0 access with IRQ on
  69  * mode = 1 access with IRQ off
  70  * mode = 2 access with IRQ off and using last offset
  71  */
  72
  73 static u_char
  74 ReadISAR(struct IsdnCardState *cs, int mode, u_char offset)
  75 {
  76         return(readb(cs->hw.isurf.isar + offset));
  77 }
  78
  79 static void
  80 WriteISAR(struct IsdnCardState *cs, int mode, u_char offset, u_char value)
  81 {
  82         writeb(value, cs->hw.isurf.isar + offset);mb();
  83 }
  84
  85 static irqreturn_t
  86 isurf_interrupt(int intno, void *dev_id, struct pt_regs *regs)
  87 {
  88         struct IsdnCardState *cs = dev_id;
  89         u_char val;
  90         int cnt = 5;
  91         u_long flags;
  92
  93         spin_lock_irqsave(&cs->lock, flags);
  94         val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
  95       Start_ISAR:
  96         if (val & ISAR_IRQSTA)
  97                 isar_int_main(cs);
  98         val = readb(cs->hw.isurf.isac + ISAC_ISTA);
  99       Start_ISAC:
 100         if (val)
 101                 isac_interrupt(cs, val);
 102         val = readb(cs->hw.isurf.isar + ISAR_IRQBIT);
 103         if ((val & ISAR_IRQSTA) && --cnt) {
 104                 if (cs->debug & L1_DEB_HSCX)
 105                         debugl1(cs, "ISAR IntStat after IntRoutine");
 106                 goto Start_ISAR;
 107         }
 108         val = readb(cs->hw.isurf.isac + ISAC_ISTA);
 109         if (val && --cnt) {
 110                 if (cs->debug & L1_DEB_ISAC)
 111                         debugl1(cs, "ISAC IntStat after IntRoutine");
 112                 goto Start_ISAC;
 113         }
 114         if (!cnt)
 115                 printk(KERN_WARNING "ISurf IRQ LOOP\n");
 116
 117         writeb(0, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
 118         writeb(0xFF, cs->hw.isurf.isac + ISAC_MASK);mb();
 119         writeb(0, cs->hw.isurf.isac + ISAC_MASK);mb();
 120         writeb(ISAR_IRQMSK, cs->hw.isurf.isar + ISAR_IRQBIT); mb();
 121         spin_unlock_irqrestore(&cs->lock, flags);
 122         return IRQ_HANDLED;
 123 }
 124
 125 static void
 126 release_io_isurf(struct IsdnCardState *cs)
 127 {
 128         release_region(cs->hw.isurf.reset, 1);
 129         iounmap(cs->hw.isurf.isar);
 130         release_mem_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
 131 }
 132
 133 static void
 134 reset_isurf(struct IsdnCardState *cs, u_char chips)
 135 {
 136         printk(KERN_INFO "ISurf: resetting card\n");
 137
 138         byteout(cs->hw.isurf.reset, chips); /* Reset On */
 139         mdelay(10);
 140         byteout(cs->hw.isurf.reset, ISURF_ISAR_EA); /* Reset Off */
 141         mdelay(10);
 142 }
 143
 144 static int
 145 ISurf_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 146 {
 147         u_long flags;
 148
 149         switch (mt) {
 150                 case CARD_RESET:
 151                         spin_lock_irqsave(&cs->lock, flags);
 152                         reset_isurf(cs, ISURF_RESET);
 153                         spin_unlock_irqrestore(&cs->lock, flags);
 154                         return(0);
 155                 case CARD_RELEASE:
 156                         release_io_isurf(cs);
 157                         return(0);
 158                 case CARD_INIT:
 159                         spin_lock_irqsave(&cs->lock, flags);
 160                         reset_isurf(cs, ISURF_RESET);
 161                         clear_pending_isac_ints(cs);
 162                         writeb(0, cs->hw.isurf.isar+ISAR_IRQBIT);mb();
 163                         initisac(cs);
 164                         initisar(cs);
 165                         /* Reenable ISAC IRQ */
 166                         cs->writeisac(cs, ISAC_MASK, 0);
 167                         /* RESET Receiver and Transmitter */
 168                         cs->writeisac(cs, ISAC_CMDR, 0x41);
 169                         spin_unlock_irqrestore(&cs->lock, flags);
 170                         return(0);
 171                 case CARD_TEST:
 172                         return(0);
 173         }
 174         return(0);
 175 }
 176
 177 static int
 178 isurf_auxcmd(struct IsdnCardState *cs, isdn_ctrl *ic) {
 179         int ret;
 180         u_long flags;
 181
 182         if ((ic->command == ISDN_CMD_IOCTL) && (ic->arg == 9)) {
 183                 ret = isar_auxcmd(cs, ic);
 184                 spin_lock_irqsave(&cs->lock, flags);
 185                 if (!ret) {
 186                         reset_isurf(cs, ISURF_ISAR_EA | ISURF_ISAC_RESET |
 187                                 ISURF_ARCOFI_RESET);
 188                         initisac(cs);
 189                         cs->writeisac(cs, ISAC_MASK, 0);
 190                         cs->writeisac(cs, ISAC_CMDR, 0x41);
 191                 }
 192                 spin_unlock_irqrestore(&cs->lock, flags);
 193                 return(ret);
 194         }
 195         return(isar_auxcmd(cs, ic));
 196 }
 197
 198 #ifdef __ISAPNP__
 199 static struct pnp_card *pnp_c __initdata = NULL;
 200 #endif
 201
 202 int __init
 203 setup_isurf(struct IsdnCard *card)
 204 {
 205         int ver;
 206         struct IsdnCardState *cs = card->cs;
 207         char tmp[64];
 208
 209         strcpy(tmp, ISurf_revision);
 210         printk(KERN_INFO "HiSax: ISurf driver Rev. %s\n", HiSax_getrev(tmp));
 211
 212         if (cs->typ != ISDN_CTYPE_ISURF)
 213                 return(0);
 214         if (card->para[1] && card->para[2]) {
 215                 cs->hw.isurf.reset = card->para[1];
 216                 cs->hw.isurf.phymem = card->para[2];
 217                 cs->irq = card->para[0];
 218         } else {
 219 #ifdef __ISAPNP__
 220                 if (isapnp_present()) {
 221                         struct pnp_dev *pnp_d = NULL;
 222                         int err;
 223
 224                         cs->subtyp = 0;
 225                         if ((pnp_c = pnp_find_card(
 226                                 ISAPNP_VENDOR('S', 'I', 'E'),
 227                                 ISAPNP_FUNCTION(0x0010), pnp_c))) {
 228                                 if (!(pnp_d = pnp_find_dev(pnp_c,
 229                                         ISAPNP_VENDOR('S', 'I', 'E'),
 230                                         ISAPNP_FUNCTION(0x0010), pnp_d))) {
 231                                         printk(KERN_ERR "ISurfPnP: PnP error card found, no device\n");
 232                                         return (0);
 233                                 }
 234                                 pnp_disable_dev(pnp_d);
 235                                 err = pnp_activate_dev(pnp_d);
 236                                 cs->hw.isurf.reset = pnp_port_start(pnp_d, 0);
 237                                 cs->hw.isurf.phymem = pnp_mem_start(pnp_d, 1);
 238                                 cs->irq = pnp_irq(pnp_d, 0);
 239                                 if (!cs->irq || !cs->hw.isurf.reset || !cs->hw.isurf.phymem) {
 240                                         printk(KERN_ERR "ISurfPnP:some resources are missing %d/%x/%lx\n",
 241                                                 cs->irq, cs->hw.isurf.reset, cs->hw.isurf.phymem);
 242                                         pnp_disable_dev(pnp_d);
 243                                         return(0);
 244                                 }
 245                         } else {
 246                                 printk(KERN_INFO "ISurfPnP: no ISAPnP card found\n");
 247                                 return(0);
 248                         }
 249                 } else {
 250                         printk(KERN_INFO "ISurfPnP: no ISAPnP bus found\n");
 251                         return(0);
 252                 }
 253 #else
 254                 printk(KERN_WARNING "HiSax: %s port/mem not set\n",
 255                         CardType[card->typ]);
 256                 return (0);
 257 #endif
 258         }
 259         if (!request_region(cs->hw.isurf.reset, 1, "isurf isdn")) {
 260                 printk(KERN_WARNING
 261                         "HiSax: %s config port %x already in use\n",
 262                         CardType[card->typ],
 263                         cs->hw.isurf.reset);
 264                         return (0);
 265         }
 266         if (!request_region(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE, "isurf iomem")) {
 267                 printk(KERN_WARNING
 268                         "HiSax: %s memory region %lx-%lx already in use\n",
 269                         CardType[card->typ],
 270                         cs->hw.isurf.phymem,
 271                         cs->hw.isurf.phymem + ISURF_IOMEM_SIZE);
 272                 release_region(cs->hw.isurf.reset, 1);
 273                 return (0);
 274         }
 275         cs->hw.isurf.isar = ioremap(cs->hw.isurf.phymem, ISURF_IOMEM_SIZE);
 276         cs->hw.isurf.isac = cs->hw.isurf.isar + ISURF_ISAC_OFFSET;
 277         printk(KERN_INFO
 278                "ISurf: defined at 0x%x 0x%lx IRQ %d\n",
 279                cs->hw.isurf.reset,
 280                cs->hw.isurf.phymem,
 281                cs->irq);
 282
 283         setup_isac(cs);
 284         cs->cardmsg = &ISurf_card_msg;
 285         cs->irq_func = &isurf_interrupt;
 286         cs->auxcmd = &isurf_auxcmd;
 287         cs->readisac = &ReadISAC;
 288         cs->writeisac = &WriteISAC;
 289         cs->readisacfifo = &ReadISACfifo;
 290         cs->writeisacfifo = &WriteISACfifo;
 291         cs->bcs[0].hw.isar.reg = &cs->hw.isurf.isar_r;
 292         cs->bcs[1].hw.isar.reg = &cs->hw.isurf.isar_r;
 293         test_and_set_bit(HW_ISAR, &cs->HW_Flags);
 294         ISACVersion(cs, "ISurf:");
 295         cs->BC_Read_Reg = &ReadISAR;
 296         cs->BC_Write_Reg = &WriteISAR;
 297         cs->BC_Send_Data = &isar_fill_fifo;
 298         ver = ISARVersion(cs, "ISurf:");
 299         if (ver < 0) {
 300                 printk(KERN_WARNING
 301                         "ISurf: wrong ISAR version (ret = %d)\n", ver);
 302                 release_io_isurf(cs);
 303                 return (0);
 304         }
 305         return (1);
 306 }