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