kernel/drivers/isdn/hisax/bkm_a8.c

   1 /* $Id: bkm_a8.c,v 1.22.2.4 2004/01/15 14:02:34 keil Exp $
   2  *
   3  * low level stuff for Scitel Quadro (4*S0, passive)
   4  *
   5  * Author       Roland Klabunde
   6  * Copyright    by Roland Klabunde   <R.Klabunde@Berkom.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
  14 #include <linux/init.h>
  15 #include "hisax.h"
  16 #include "isac.h"
  17 #include "ipac.h"
  18 #include "hscx.h"
  19 #include "isdnl1.h"
  20 #include <linux/pci.h>
  21 #include "bkm_ax.h"
  22
  23 #define ATTEMPT_PCI_REMAPPING   /* Required for PLX rev 1 */
  24
  25 static const char sct_quadro_revision[] = "$Revision: 1.22.2.4 $";
  26
  27 static const char *sct_quadro_subtypes[] =
  28 {
  29         "",
  30         "#1",
  31         "#2",
  32         "#3",
  33         "#4"
  34 };
  35
  36
  37 #define wordout(addr, val) outw(val, addr)
  38 #define wordin(addr) inw(addr)
  39
  40 static inline u_char
  41 readreg(unsigned int ale, unsigned int adr, u_char off)
  42 {
  43         register u_char ret;
  44         wordout(ale, off);
  45         ret = wordin(adr) & 0xFF;
  46         return (ret);
  47 }
  48
  49 static inline void
  50 readfifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
  51 {
  52         int i;
  53         wordout(ale, off);
  54         for (i = 0; i < size; i++)
  55                 data[i] = wordin(adr) & 0xFF;
  56 }
  57
  58
  59 static inline void
  60 writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
  61 {
  62         wordout(ale, off);
  63         wordout(adr, data);
  64 }
  65
  66 static inline void
  67 writefifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
  68 {
  69         int i;
  70         wordout(ale, off);
  71         for (i = 0; i < size; i++)
  72                 wordout(adr, data[i]);
  73 }
  74
  75 /* Interface functions */
  76
  77 static u_char
  78 ReadISAC(struct IsdnCardState *cs, u_char offset)
  79 {
  80         return (readreg(cs->hw.ax.base, cs->hw.ax.data_adr, offset | 0x80));
  81 }
  82
  83 static void
  84 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  85 {
  86         writereg(cs->hw.ax.base, cs->hw.ax.data_adr, offset | 0x80, value);
  87 }
  88
  89 static void
  90 ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  91 {
  92         readfifo(cs->hw.ax.base, cs->hw.ax.data_adr, 0x80, data, size);
  93 }
  94
  95 static void
  96 WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
  97 {
  98         writefifo(cs->hw.ax.base, cs->hw.ax.data_adr, 0x80, data, size);
  99 }
 100
 101
 102 static u_char
 103 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
 104 {
 105         return (readreg(cs->hw.ax.base, cs->hw.ax.data_adr, offset + (hscx ? 0x40 : 0)));
 106 }
 107
 108 static void
 109 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
 110 {
 111         writereg(cs->hw.ax.base, cs->hw.ax.data_adr, offset + (hscx ? 0x40 : 0), value);
 112 }
 113
 114 /* Set the specific ipac to active */
 115 static void
 116 set_ipac_active(struct IsdnCardState *cs, u_int active)
 117 {
 118         /* set irq mask */
 119         writereg(cs->hw.ax.base, cs->hw.ax.data_adr, IPAC_MASK,
 120                  active ? 0xc0 : 0xff);
 121 }
 122
 123 /*
 124  * fast interrupt HSCX stuff goes here
 125  */
 126
 127 #define READHSCX(cs, nr, reg) readreg(cs->hw.ax.base,                   \
 128                                       cs->hw.ax.data_adr, reg + (nr ? 0x40 : 0))
 129 #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.ax.base,           \
 130                                               cs->hw.ax.data_adr, reg + (nr ? 0x40 : 0), data)
 131 #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ax.base,         \
 132                                                 cs->hw.ax.data_adr, (nr ? 0x40 : 0), ptr, cnt)
 133 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.ax.base,       \
 134                                                   cs->hw.ax.data_adr, (nr ? 0x40 : 0), ptr, cnt)
 135
 136 #include "hscx_irq.c"
 137
 138 static irqreturn_t
 139 bkm_interrupt_ipac(int intno, void *dev_id)
 140 {
 141         struct IsdnCardState *cs = dev_id;
 142         u_char ista, val, icnt = 5;
 143         u_long flags;
 144
 145         spin_lock_irqsave(&cs->lock, flags);
 146         ista = readreg(cs->hw.ax.base, cs->hw.ax.data_adr, IPAC_ISTA);
 147         if (!(ista & 0x3f)) { /* not this IPAC */
 148                 spin_unlock_irqrestore(&cs->lock, flags);
 149                 return IRQ_NONE;
 150         }
 151 Start_IPAC:
 152         if (cs->debug & L1_DEB_IPAC)
 153                 debugl1(cs, "IPAC ISTA %02X", ista);
 154         if (ista & 0x0f) {
 155                 val = readreg(cs->hw.ax.base, cs->hw.ax.data_adr, HSCX_ISTA + 0x40);
 156                 if (ista & 0x01)
 157                         val |= 0x01;
 158                 if (ista & 0x04)
 159                         val |= 0x02;
 160                 if (ista & 0x08)
 161                         val |= 0x04;
 162                 if (val) {
 163                         hscx_int_main(cs, val);
 164                 }
 165         }
 166         if (ista & 0x20) {
 167                 val = 0xfe & readreg(cs->hw.ax.base, cs->hw.ax.data_adr, ISAC_ISTA | 0x80);
 168                 if (val) {
 169                         isac_interrupt(cs, val);
 170                 }
 171         }
 172         if (ista & 0x10) {
 173                 val = 0x01;
 174                 isac_interrupt(cs, val);
 175         }
 176         ista = readreg(cs->hw.ax.base, cs->hw.ax.data_adr, IPAC_ISTA);
 177         if ((ista & 0x3f) && icnt) {
 178                 icnt--;
 179                 goto Start_IPAC;
 180         }
 181         if (!icnt)
 182                 printk(KERN_WARNING "HiSax: Scitel Quadro (%s) IRQ LOOP\n",
 183                        sct_quadro_subtypes[cs->subtyp]);
 184         writereg(cs->hw.ax.base, cs->hw.ax.data_adr, IPAC_MASK, 0xFF);
 185         writereg(cs->hw.ax.base, cs->hw.ax.data_adr, IPAC_MASK, 0xC0);
 186         spin_unlock_irqrestore(&cs->lock, flags);
 187         return IRQ_HANDLED;
 188 }
 189
 190 static void
 191 release_io_sct_quadro(struct IsdnCardState *cs)
 192 {
 193         release_region(cs->hw.ax.base & 0xffffffc0, 128);
 194         if (cs->subtyp == SCT_1)
 195                 release_region(cs->hw.ax.plx_adr, 64);
 196 }
 197
 198 static void
 199 enable_bkm_int(struct IsdnCardState *cs, unsigned bEnable)
 200 {
 201         if (cs->typ == ISDN_CTYPE_SCT_QUADRO) {
 202                 if (bEnable)
 203                         wordout(cs->hw.ax.plx_adr + 0x4C, (wordin(cs->hw.ax.plx_adr + 0x4C) | 0x41));
 204                 else
 205                         wordout(cs->hw.ax.plx_adr + 0x4C, (wordin(cs->hw.ax.plx_adr + 0x4C) & ~0x41));
 206         }
 207 }
 208
 209 static void
 210 reset_bkm(struct IsdnCardState *cs)
 211 {
 212         if (cs->subtyp == SCT_1) {
 213                 wordout(cs->hw.ax.plx_adr + 0x50, (wordin(cs->hw.ax.plx_adr + 0x50) & ~4));
 214                 mdelay(10);
 215                 /* Remove the soft reset */
 216                 wordout(cs->hw.ax.plx_adr + 0x50, (wordin(cs->hw.ax.plx_adr + 0x50) | 4));
 217                 mdelay(10);
 218         }
 219 }
 220
 221 static int
 222 BKM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 223 {
 224         u_long flags;
 225
 226         switch (mt) {
 227         case CARD_RESET:
 228                 spin_lock_irqsave(&cs->lock, flags);
 229                 /* Disable ints */
 230                 set_ipac_active(cs, 0);
 231                 enable_bkm_int(cs, 0);
 232                 reset_bkm(cs);
 233                 spin_unlock_irqrestore(&cs->lock, flags);
 234                 return (0);
 235         case CARD_RELEASE:
 236                 /* Sanity */
 237                 spin_lock_irqsave(&cs->lock, flags);
 238                 set_ipac_active(cs, 0);
 239                 enable_bkm_int(cs, 0);
 240                 spin_unlock_irqrestore(&cs->lock, flags);
 241                 release_io_sct_quadro(cs);
 242                 return (0);
 243         case CARD_INIT:
 244                 spin_lock_irqsave(&cs->lock, flags);
 245                 cs->debug |= L1_DEB_IPAC;
 246                 set_ipac_active(cs, 1);
 247                 inithscxisac(cs, 3);
 248                 /* Enable ints */
 249                 enable_bkm_int(cs, 1);
 250                 spin_unlock_irqrestore(&cs->lock, flags);
 251                 return (0);
 252         case CARD_TEST:
 253                 return (0);
 254         }
 255         return (0);
 256 }
 257
 258 static int sct_alloc_io(u_int adr, u_int len)
 259 {
 260         if (!request_region(adr, len, "scitel")) {
 261                 printk(KERN_WARNING
 262                        "HiSax: Scitel port %#x-%#x already in use\n",
 263                        adr, adr + len);
 264                 return (1);
 265         }
 266         return (0);
 267 }
 268
 269 static struct pci_dev *dev_a8 = NULL;
 270 static u16  sub_vendor_id = 0;
 271 static u16  sub_sys_id = 0;
 272 static u_char pci_bus = 0;
 273 static u_char pci_device_fn = 0;
 274 static u_char pci_irq = 0;
 275
 276 int setup_sct_quadro(struct IsdnCard *card)
 277 {
 278         struct IsdnCardState *cs = card->cs;
 279         char tmp[64];
 280         u_int found = 0;
 281         u_int pci_ioaddr1, pci_ioaddr2, pci_ioaddr3, pci_ioaddr4, pci_ioaddr5;
 282
 283         strcpy(tmp, sct_quadro_revision);
 284         printk(KERN_INFO "HiSax: T-Berkom driver Rev. %s\n", HiSax_getrev(tmp));
 285         if (cs->typ == ISDN_CTYPE_SCT_QUADRO) {
 286                 cs->subtyp = SCT_1;     /* Preset */
 287         } else
 288                 return (0);
 289
 290         /* Identify subtype by para[0] */
 291         if (card->para[0] >= SCT_1 && card->para[0] <= SCT_4)
 292                 cs->subtyp = card->para[0];
 293         else {
 294                 printk(KERN_WARNING "HiSax: Scitel Quadro: Invalid "
 295                        "subcontroller in configuration, default to 1\n");
 296                 return (0);
 297         }
 298         if ((cs->subtyp != SCT_1) && ((sub_sys_id != PCI_DEVICE_ID_BERKOM_SCITEL_QUADRO) ||
 299                                       (sub_vendor_id != PCI_VENDOR_ID_BERKOM)))
 300                 return (0);
 301         if (cs->subtyp == SCT_1) {
 302                 while ((dev_a8 = hisax_find_pci_device(PCI_VENDOR_ID_PLX,
 303                                                        PCI_DEVICE_ID_PLX_9050, dev_a8))) {
 304
 305                         sub_vendor_id = dev_a8->subsystem_vendor;
 306                         sub_sys_id = dev_a8->subsystem_device;
 307                         if ((sub_sys_id == PCI_DEVICE_ID_BERKOM_SCITEL_QUADRO) &&
 308                             (sub_vendor_id == PCI_VENDOR_ID_BERKOM)) {
 309                                 if (pci_enable_device(dev_a8))
 310                                         return (0);
 311                                 pci_ioaddr1 = pci_resource_start(dev_a8, 1);
 312                                 pci_irq = dev_a8->irq;
 313                                 pci_bus = dev_a8->bus->number;
 314                                 pci_device_fn = dev_a8->devfn;
 315                                 found = 1;
 316                                 break;
 317                         }
 318                 }
 319                 if (!found) {
 320                         printk(KERN_WARNING "HiSax: Scitel Quadro (%s): "
 321                                "Card not found\n",
 322                                sct_quadro_subtypes[cs->subtyp]);
 323                         return (0);
 324                 }
 325 #ifdef ATTEMPT_PCI_REMAPPING
 326 /* HACK: PLX revision 1 bug: PLX address bit 7 must not be set */
 327                 if ((pci_ioaddr1 & 0x80) && (dev_a8->revision == 1)) {
 328                         printk(KERN_WARNING "HiSax: Scitel Quadro (%s): "
 329                                "PLX rev 1, remapping required!\n",
 330                                sct_quadro_subtypes[cs->subtyp]);
 331                         /* Restart PCI negotiation */
 332                         pci_write_config_dword(dev_a8, PCI_BASE_ADDRESS_1, (u_int)-1);
 333                         /* Move up by 0x80 byte */
 334                         pci_ioaddr1 += 0x80;
 335                         pci_ioaddr1 &= PCI_BASE_ADDRESS_IO_MASK;
 336                         pci_write_config_dword(dev_a8, PCI_BASE_ADDRESS_1, pci_ioaddr1);
 337                         dev_a8->resource[1].start = pci_ioaddr1;
 338                 }
 339 #endif /* End HACK */
 340         }
 341         if (!pci_irq) {         /* IRQ range check ?? */
 342                 printk(KERN_WARNING "HiSax: Scitel Quadro (%s): No IRQ\n",
 343                        sct_quadro_subtypes[cs->subtyp]);
 344                 return (0);
 345         }
 346         pci_read_config_dword(dev_a8, PCI_BASE_ADDRESS_1, &pci_ioaddr1);
 347         pci_read_config_dword(dev_a8, PCI_BASE_ADDRESS_2, &pci_ioaddr2);
 348         pci_read_config_dword(dev_a8, PCI_BASE_ADDRESS_3, &pci_ioaddr3);
 349         pci_read_config_dword(dev_a8, PCI_BASE_ADDRESS_4, &pci_ioaddr4);
 350         pci_read_config_dword(dev_a8, PCI_BASE_ADDRESS_5, &pci_ioaddr5);
 351         if (!pci_ioaddr1 || !pci_ioaddr2 || !pci_ioaddr3 || !pci_ioaddr4 || !pci_ioaddr5) {
 352                 printk(KERN_WARNING "HiSax: Scitel Quadro (%s): "
 353                        "No IO base address(es)\n",
 354                        sct_quadro_subtypes[cs->subtyp]);
 355                 return (0);
 356         }
 357         pci_ioaddr1 &= PCI_BASE_ADDRESS_IO_MASK;
 358         pci_ioaddr2 &= PCI_BASE_ADDRESS_IO_MASK;
 359         pci_ioaddr3 &= PCI_BASE_ADDRESS_IO_MASK;
 360         pci_ioaddr4 &= PCI_BASE_ADDRESS_IO_MASK;
 361         pci_ioaddr5 &= PCI_BASE_ADDRESS_IO_MASK;
 362         /* Take over */
 363         cs->irq = pci_irq;
 364         cs->irq_flags |= IRQF_SHARED;
 365         /* pci_ioaddr1 is unique to all subdevices */
 366         /* pci_ioaddr2 is for the fourth subdevice only */
 367         /* pci_ioaddr3 is for the third subdevice only */
 368         /* pci_ioaddr4 is for the second subdevice only */
 369         /* pci_ioaddr5 is for the first subdevice only */
 370         cs->hw.ax.plx_adr = pci_ioaddr1;
 371         /* Enter all ipac_base addresses */
 372         switch (cs->subtyp) {
 373         case 1:
 374                 cs->hw.ax.base = pci_ioaddr5 + 0x00;
 375                 if (sct_alloc_io(pci_ioaddr1, 128))
 376                         return (0);
 377                 if (sct_alloc_io(pci_ioaddr5, 64))
 378                         return (0);
 379                 /* disable all IPAC */
 380                 writereg(pci_ioaddr5, pci_ioaddr5 + 4,
 381                          IPAC_MASK, 0xFF);
 382                 writereg(pci_ioaddr4 + 0x08, pci_ioaddr4 + 0x0c,
 383                          IPAC_MASK, 0xFF);
 384                 writereg(pci_ioaddr3 + 0x10, pci_ioaddr3 + 0x14,
 385                          IPAC_MASK, 0xFF);
 386                 writereg(pci_ioaddr2 + 0x20, pci_ioaddr2 + 0x24,
 387                          IPAC_MASK, 0xFF);
 388                 break;
 389         case 2:
 390                 cs->hw.ax.base = pci_ioaddr4 + 0x08;
 391                 if (sct_alloc_io(pci_ioaddr4, 64))
 392                         return (0);
 393                 break;
 394         case 3:
 395                 cs->hw.ax.base = pci_ioaddr3 + 0x10;
 396                 if (sct_alloc_io(pci_ioaddr3, 64))
 397                         return (0);
 398                 break;
 399         case 4:
 400                 cs->hw.ax.base = pci_ioaddr2 + 0x20;
 401                 if (sct_alloc_io(pci_ioaddr2, 64))
 402                         return (0);
 403                 break;
 404         }
 405         /* For isac and hscx data path */
 406         cs->hw.ax.data_adr = cs->hw.ax.base + 4;
 407
 408         printk(KERN_INFO "HiSax: Scitel Quadro (%s) configured at "
 409                "0x%.4lX, 0x%.4lX, 0x%.4lX and IRQ %d\n",
 410                sct_quadro_subtypes[cs->subtyp],
 411                cs->hw.ax.plx_adr,
 412                cs->hw.ax.base,
 413                cs->hw.ax.data_adr,
 414                cs->irq);
 415
 416         test_and_set_bit(HW_IPAC, &cs->HW_Flags);
 417
 418         cs->readisac = &ReadISAC;
 419         cs->writeisac = &WriteISAC;
 420         cs->readisacfifo = &ReadISACfifo;
 421         cs->writeisacfifo = &WriteISACfifo;
 422
 423         cs->BC_Read_Reg = &ReadHSCX;
 424         cs->BC_Write_Reg = &WriteHSCX;
 425         cs->BC_Send_Data = &hscx_fill_fifo;
 426         cs->cardmsg = &BKM_card_msg;
 427         cs->irq_func = &bkm_interrupt_ipac;
 428
 429         printk(KERN_INFO "HiSax: Scitel Quadro (%s): IPAC Version %d\n",
 430                sct_quadro_subtypes[cs->subtyp],
 431                readreg(cs->hw.ax.base, cs->hw.ax.data_adr, IPAC_ID));
 432         return (1);
 433 }