arch/m68knommu/kernel/comempci.c

   1 /*****************************************************************************/
   2
   3 /*
   4  *      comemlite.c -- PCI access code for embedded CO-MEM Lite PCI controller.
   5  *
   6  *      (C) Copyright 1999-2003, Greg Ungerer (gerg@snapgear.com).
   7  *      (C) Copyright 2000, Lineo (www.lineo.com)
   8  */
   9
  10 /*****************************************************************************/
  11
  12 #include <linux/config.h>
  13 #include <linux/kernel.h>
  14 #include <linux/types.h>
  15 #include <linux/pci.h>
  16 #include <linux/ptrace.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/sched.h>
  20 #include <asm/coldfire.h>
  21 #include <asm/mcfsim.h>
  22 #include <asm/irq.h>
  23 #include <asm/anchor.h>
  24
  25 #ifdef CONFIG_eLIA
  26 #include <asm/elia.h>
  27 #endif
  28
  29 /*****************************************************************************/
  30
  31 /*
  32  *      Debug configuration defines. DEBUGRES sets debugging output for
  33  *      the resource allocation phase. DEBUGPCI traces on pcibios_ function
  34  *      calls, and DEBUGIO traces all accesses to devices on the PCI bus.
  35  */
  36 /*#define       DEBUGRES        1*/
  37 /*#define       DEBUGPCI        1*/
  38 /*#define       DEBUGIO         1*/
  39
  40 /*****************************************************************************/
  41
  42 /*
  43  *      PCI markers for bus present and active slots.
  44  */
  45 int             pci_bus_is_present = 0;
  46 unsigned long   pci_slotmask = 0;
  47
  48 /*
  49  *      We may or may not need to swap the bytes of PCI bus tranfers.
  50  *      The endianess is re-roder automatically by the CO-MEM, but it
  51  *      will get the wrong byte order for a pure data stream.
  52  */
  53 #define pci_byteswap    0
  54
  55
  56 /*
  57  *      Resource tracking. The CO-MEM part creates a virtual address
  58  *      space that all the PCI devices live in - it is not in any way
  59  *      directly mapped into the ColdFire address space. So we can
  60  *      really assign any resources we like to devices, as long as
  61  *      they do not clash with other PCI devices.
  62  */
  63 unsigned int    pci_iobase = PCIBIOS_MIN_IO;    /* Arbitrary start address */
  64 unsigned int    pci_membase = PCIBIOS_MIN_MEM;  /* Arbitrary start address */
  65
  66 #define PCI_MINIO       0x100                   /* 256 byte minimum I/O */
  67 #define PCI_MINMEM      0x00010000              /* 64k minimum chunk */
  68
  69 /*
  70  *      The CO-MEM's shared memory segment is visible inside the PCI
  71  *      memory address space. We need to keep track of the address that
  72  *      this is mapped at, to setup the bus masters pointers.
  73  */
  74 unsigned int    pci_shmemaddr;
  75
  76 /*****************************************************************************/
  77
  78 void    pci_interrupt(int irq, void *id, struct pt_regs *fp);
  79
  80 /*****************************************************************************/
  81
  82 /*
  83  *      Some platforms have custom ways of reseting the PCI bus.
  84  */
  85
  86 void pci_resetbus(void)
  87 {
  88 #ifdef CONFIG_eLIA
  89         int     i;
  90
  91 #ifdef DEBUGPCI
  92         printk(KERN_DEBUG "pci_resetbus()\n");
  93 #endif
  94
  95         *((volatile unsigned short *) (MCF_MBAR+MCFSIM_PADDR)) |= eLIA_PCIRESET;
  96         for (i = 0; (i < 1000); i++) {
  97                 *((volatile unsigned short *) (MCF_MBAR + MCFSIM_PADAT)) =
  98                         (ppdata | eLIA_PCIRESET);
  99         }
 100
 101
 102         *((volatile unsigned short *) (MCF_MBAR + MCFSIM_PADAT)) = ppdata;
 103 #endif
 104 }
 105
 106 /*****************************************************************************/
 107
 108 int pcibios_assign_resource_slot(int slot)
 109 {
 110         volatile unsigned long  *rp;
 111         volatile unsigned char  *ip;
 112         unsigned int            idsel, addr, val, align, i;
 113         int                     bar;
 114
 115 #ifdef DEBUGPCI
 116         printk(KERN_INFO "pcibios_assign_resource_slot(slot=%x)\n", slot);
 117 #endif
 118
 119         rp = (volatile unsigned long *) COMEM_BASE;
 120         idsel = COMEM_DA_ADDR(0x1 << (slot + 16));
 121
 122         /* Try to assign resource to each BAR */
 123         for (bar = 0; (bar < 6); bar++) {
 124                 addr = COMEM_PCIBUS + PCI_BASE_ADDRESS_0 + (bar * 4);
 125                 rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
 126                 val = rp[LREG(addr)];
 127 #ifdef DEBUGRES
 128                 printk(KERN_DEBUG "-----------------------------------"
 129                         "-------------------------------------\n");
 130                 printk(KERN_DEBUG "BAR[%d]: read=%08x ", bar, val);
 131 #endif
 132
 133                 rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
 134                 rp[LREG(addr)] = 0xffffffff;
 135
 136                 rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
 137                 val = rp[LREG(addr)];
 138 #ifdef DEBUGRES
 139                 printk(KERN_DEBUG "write=%08x ", val);
 140 #endif
 141                 if (val == 0) {
 142 #ifdef DEBUGRES
 143                         printk(KERN_DEBUG "\n");
 144 #endif
 145                         continue;
 146                 }
 147
 148                 /* Determine space required by BAR */
 149                 /* FIXME: this should go backwords from 0x80000000... */
 150                 for (i = 0; (i < 32); i++) {
 151                         if ((0x1 << i) & (val & 0xfffffffc))
 152                                 break;
 153                 }
 154
 155 #ifdef DEBUGRES
 156                 printk(KERN_DEBUG "size=%08x(%d)\n", (0x1 << i), i);
 157 #endif
 158                 i = 0x1 << i;
 159
 160                 /* Assign a resource */
 161                 if (val & PCI_BASE_ADDRESS_SPACE_IO) {
 162                         if (i < PCI_MINIO)
 163                                 i = PCI_MINIO;
 164 #ifdef DEBUGRES
 165                         printk(KERN_DEBUG "BAR[%d]: IO size=%08x iobase=%08x\n",
 166                                 bar, i, pci_iobase);
 167 #endif
 168                         if (i > 0xffff) {
 169                                 /* Invalid size?? */
 170                                 val = 0 | PCI_BASE_ADDRESS_SPACE_IO;
 171 #ifdef DEBUGRES
 172                                 printk(KERN_DEBUG "BAR[%d]: too big for IO??\n", bar);
 173 #endif
 174                         } else {
 175                                 /* Check for un-alignment */
 176                                 if ((align = pci_iobase % i))
 177                                         pci_iobase += (i - align);
 178                                 val = pci_iobase | PCI_BASE_ADDRESS_SPACE_IO;
 179                                 pci_iobase += i;
 180                         }
 181                 } else {
 182                         if (i < PCI_MINMEM)
 183                                 i = PCI_MINMEM;
 184 #ifdef DEBUGRES
 185                         printk(KERN_DEBUG "BAR[%d]: MEMORY size=%08x membase=%08x\n",
 186                                 bar, i, pci_membase);
 187 #endif
 188                         /* Check for un-alignment */
 189                         if ((align = pci_membase % i))
 190                                 pci_membase += (i - align);
 191                         val = pci_membase | PCI_BASE_ADDRESS_SPACE_MEMORY;
 192                         pci_membase += i;
 193                 }
 194
 195                 /* Write resource back into BAR register */
 196                 rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
 197                 rp[LREG(addr)] = val;
 198 #ifdef DEBUGRES
 199                 printk(KERN_DEBUG "BAR[%d]: assigned bar=%08x\n", bar, val);
 200 #endif
 201         }
 202
 203 #ifdef DEBUGRES
 204         printk(KERN_DEBUG "-----------------------------------"
 205                         "-------------------------------------\n");
 206 #endif
 207
 208         /* Assign IRQ if one is wanted... */
 209         ip = (volatile unsigned char *) (COMEM_BASE + COMEM_PCIBUS);
 210         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
 211
 212         addr = (PCI_INTERRUPT_PIN & 0xfc) + (~PCI_INTERRUPT_PIN & 0x03);
 213         if (ip[addr]) {
 214                 rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
 215                 addr = (PCI_INTERRUPT_LINE & 0xfc)+(~PCI_INTERRUPT_LINE & 0x03);
 216                 ip[addr] = 25;
 217 #ifdef DEBUGRES
 218                 printk(KERN_DEBUG "IRQ LINE=25\n");
 219 #endif
 220         }
 221
 222         return(0);
 223 }
 224
 225 /*****************************************************************************/
 226
 227 int pcibios_enable_slot(int slot)
 228 {
 229         volatile unsigned long  *rp;
 230         volatile unsigned short *wp;
 231         unsigned int            idsel, addr;
 232         unsigned short          cmd;
 233
 234 #ifdef DEBUGPCI
 235         printk(KERN_DEBUG "pcibios_enbale_slot(slot=%x)\n", slot);
 236 #endif
 237
 238         rp = (volatile unsigned long *) COMEM_BASE;
 239         wp = (volatile unsigned short *) COMEM_BASE;
 240         idsel = COMEM_DA_ADDR(0x1 << (slot + 16));
 241
 242         /* Get current command settings */
 243         addr = COMEM_PCIBUS + PCI_COMMAND;
 244         addr = (addr & ~0x3) + (~addr & 0x02);
 245         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
 246         cmd = wp[WREG(addr)];
 247         /*val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);*/
 248
 249         /* Enable I/O and memory accesses to this device */
 250         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
 251         cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
 252         wp[WREG(addr)] = cmd;
 253
 254         return(0);
 255 }
 256
 257 /*****************************************************************************/
 258
 259 void pcibios_assign_resources(void)
 260 {
 261         volatile unsigned long  *rp;
 262         unsigned long           sel, id;
 263         int                     slot;
 264
 265         rp = (volatile unsigned long *) COMEM_BASE;
 266
 267         /*
 268          *      Do a quick scan of the PCI bus and see what is here.
 269          */
 270         for (slot = COMEM_MINDEV; (slot <= COMEM_MAXDEV); slot++) {
 271                 sel = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << (slot + 16));
 272                 rp[LREG(COMEM_DAHBASE)] = sel;
 273                 rp[LREG(COMEM_PCIBUS)] = 0; /* Clear bus */
 274                 id = rp[LREG(COMEM_PCIBUS)];
 275                 if ((id != 0) && ((id & 0xffff0000) != (sel & 0xffff0000))) {
 276                         printk(KERN_INFO "PCI: slot=%d id=%08x\n", slot, (int) id);
 277                         pci_slotmask |= 0x1 << slot;
 278                         pcibios_assign_resource_slot(slot);
 279                         pcibios_enable_slot(slot);
 280                 }
 281         }
 282 }
 283
 284 /*****************************************************************************/
 285
 286 int pcibios_init(void)
 287 {
 288         volatile unsigned long  *rp;
 289         unsigned long           sel, id;
 290         int                     slot;
 291
 292 #ifdef DEBUGPCI
 293         printk(KERN_DEBUG "pcibios_init()\n");
 294 #endif
 295
 296         pci_resetbus();
 297
 298         /*
 299          *      Do some sort of basic check to see if the CO-MEM part
 300          *      is present... This works ok, but I think we really need
 301          *      something better...
 302          */
 303         rp = (volatile unsigned long *) COMEM_BASE;
 304         if ((rp[LREG(COMEM_LBUSCFG)] & 0xff) != 0x50) {
 305                 printk(KERN_INFO "PCI: no PCI bus present\n");
 306                 return(0);
 307         }
 308
 309 #ifdef COMEM_BRIDGEDEV
 310         /*
 311          *      Setup the PCI bridge device first. It needs resources too,
 312          *      so that bus masters can get to its shared memory.
 313          */
 314         slot = COMEM_BRIDGEDEV;
 315         sel = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << (slot + 16));
 316         rp[LREG(COMEM_DAHBASE)] = sel;
 317         rp[LREG(COMEM_PCIBUS)] = 0; /* Clear bus */
 318         id = rp[LREG(COMEM_PCIBUS)];
 319         if ((id == 0) || ((id & 0xffff0000) == (sel & 0xffff0000))) {
 320                 printk(KERN_INFO "PCI: no PCI bus bridge present\n");
 321                 return(0);
 322         }
 323
 324         printk(KERN_INFO "PCI: bridge device at slot=%d id=%08x\n", slot, (int) id);
 325         pci_slotmask |= 0x1 << slot;
 326         pci_shmemaddr = pci_membase;
 327         pcibios_assign_resource_slot(slot);
 328         pcibios_enable_slot(slot);
 329 #endif
 330
 331         pci_bus_is_present = 1;
 332
 333         /* Get PCI irq for local vectoring */
 334         if (request_irq(COMEM_IRQ, pci_interrupt, 0, "PCI bridge", NULL)) {
 335                 printk(KERN_WARNING "PCI: failed to acquire interrupt %d\n", COMEM_IRQ);
 336         } else {
 337                 mcf_autovector(COMEM_IRQ);
 338         }
 339
 340         pcibios_assign_resources();
 341
 342         return(0);
 343 }
 344
 345 /*****************************************************************************/
 346
 347 char *pcibios_setup(char *option)
 348 {
 349         /* Nothing for us to handle. */
 350         return(option);
 351 }
 352 /*****************************************************************************/
 353
 354 void pcibios_fixup_bus(struct pci_bus *b)
 355 {
 356 }
 357
 358 /*****************************************************************************/
 359
 360 void pcibios_align_resource(void *data, struct resource *res, unsigned long size, unsigned long align)
 361 {
 362 }
 363
 364 /*****************************************************************************/
 365
 366 int pcibios_enable_device(struct pci_dev *dev, int mask)
 367 {
 368         int slot;
 369
 370         slot = PCI_SLOT(dev->devfn);
 371         if ((dev->bus == 0) && (pci_slotmask & (1 << slot)))
 372                 pcibios_enable_slot(slot);
 373         return(0);
 374 }
 375
 376 /*****************************************************************************/
 377
 378 void pcibios_update_resource(struct pci_dev *dev, struct resource *root, struct resource *r, int resource)
 379 {
 380         printk(KERN_WARNING "%s(%d): no support for changing PCI resources...\n",
 381                 __FILE__, __LINE__);
 382 }
 383
 384
 385 /*****************************************************************************/
 386
 387 /*
 388  *      Local routines to interrcept the standard I/O and vector handling
 389  *      code. Don't include this 'till now - initialization code above needs
 390  *      access to the real code too.
 391  */
 392 #include <asm/mcfpci.h>
 393
 394 /*****************************************************************************/
 395
 396 void pci_outb(unsigned char val, unsigned int addr)
 397 {
 398         volatile unsigned long  *rp;
 399         volatile unsigned char  *bp;
 400
 401 #ifdef DEBUGIO
 402         printk(KERN_DEBUG "pci_outb(val=%02x,addr=%x)\n", val, addr);
 403 #endif
 404
 405         rp = (volatile unsigned long *) COMEM_BASE;
 406         bp = (volatile unsigned char *) COMEM_BASE;
 407         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
 408         addr = (addr & ~0x3) + (~addr & 0x03);
 409         bp[(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
 410 }
 411
 412 /*****************************************************************************/
 413
 414 void pci_outw(unsigned short val, unsigned int addr)
 415 {
 416         volatile unsigned long  *rp;
 417         volatile unsigned short *sp;
 418
 419 #ifdef DEBUGIO
 420         printk(KERN_DEBUG "pci_outw(val=%04x,addr=%x)\n", val, addr);
 421 #endif
 422
 423         rp = (volatile unsigned long *) COMEM_BASE;
 424         sp = (volatile unsigned short *) COMEM_BASE;
 425         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
 426         addr = (addr & ~0x3) + (~addr & 0x02);
 427         if (pci_byteswap)
 428                 val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);
 429         sp[WREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
 430 }
 431
 432 /*****************************************************************************/
 433
 434 void pci_outl(unsigned int val, unsigned int addr)
 435 {
 436         volatile unsigned long  *rp;
 437         volatile unsigned int   *lp;
 438
 439 #ifdef DEBUGIO
 440         printk(KERN_DEBUG "pci_outl(val=%08x,addr=%x)\n", val, addr);
 441 #endif
 442
 443         rp = (volatile unsigned long *) COMEM_BASE;
 444         lp = (volatile unsigned int *) COMEM_BASE;
 445         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
 446
 447         if (pci_byteswap)
 448                 val = (val << 24) | ((val & 0x0000ff00) << 8) |
 449                         ((val & 0x00ff0000) >> 8) | (val >> 24);
 450
 451         lp[LREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
 452 }
 453
 454 /*****************************************************************************/
 455
 456 unsigned long   pci_blmask[] = {
 457         0x000000e0,
 458         0x000000d0,
 459         0x000000b0,
 460         0x00000070
 461 };
 462
 463 unsigned char pci_inb(unsigned int addr)
 464 {
 465         volatile unsigned long  *rp;
 466         volatile unsigned char  *bp;
 467         unsigned long           r;
 468         unsigned char           val;
 469
 470 #ifdef DEBUGIO
 471         printk(KERN_DEBUG "pci_inb(addr=%x)\n", addr);
 472 #endif
 473
 474         rp = (volatile unsigned long *) COMEM_BASE;
 475         bp = (volatile unsigned char *) COMEM_BASE;
 476
 477         r = COMEM_DA_IORD | COMEM_DA_ADDR(addr) | pci_blmask[(addr & 0x3)];
 478         rp[LREG(COMEM_DAHBASE)] = r;
 479
 480         addr = (addr & ~0x3) + (~addr & 0x3);
 481         val = bp[(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
 482         return(val);
 483 }
 484
 485 /*****************************************************************************/
 486
 487 unsigned long   pci_bwmask[] = {
 488         0x000000c0,
 489         0x000000c0,
 490         0x00000030,
 491         0x00000030
 492 };
 493
 494 unsigned short pci_inw(unsigned int addr)
 495 {
 496         volatile unsigned long  *rp;
 497         volatile unsigned short *sp;
 498         unsigned long           r;
 499         unsigned short          val;
 500
 501 #ifdef DEBUGIO
 502         printk(KERN_DEBUG "pci_inw(addr=%x)", addr);
 503 #endif
 504
 505         rp = (volatile unsigned long *) COMEM_BASE;
 506         r = COMEM_DA_IORD | COMEM_DA_ADDR(addr) | pci_bwmask[(addr & 0x3)];
 507         rp[LREG(COMEM_DAHBASE)] = r;
 508
 509         sp = (volatile unsigned short *) COMEM_BASE;
 510         addr = (addr & ~0x3) + (~addr & 0x02);
 511         val = sp[WREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
 512         if (pci_byteswap)
 513                 val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);
 514 #ifdef DEBUGIO
 515         printk(KERN_DEBUG "=%04x\n", val);
 516 #endif
 517         return(val);
 518 }
 519
 520 /*****************************************************************************/
 521
 522 unsigned int pci_inl(unsigned int addr)
 523 {
 524         volatile unsigned long  *rp;
 525         volatile unsigned int   *lp;
 526         unsigned int            val;
 527
 528 #ifdef DEBUGIO
 529         printk(KERN_DEBUG "pci_inl(addr=%x)", addr);
 530 #endif
 531
 532         rp = (volatile unsigned long *) COMEM_BASE;
 533         lp = (volatile unsigned int *) COMEM_BASE;
 534         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(addr);
 535         val = lp[LREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
 536
 537         if (pci_byteswap)
 538                 val = (val << 24) | ((val & 0x0000ff00) << 8) |
 539                         ((val & 0x00ff0000) >> 8) | (val >> 24);
 540
 541 #ifdef DEBUGIO
 542         printk(KERN_DEBUG "=%08x\n", val);
 543 #endif
 544         return(val);
 545 }
 546
 547 /*****************************************************************************/
 548
 549 void pci_outsb(void *addr, void *buf, int len)
 550 {
 551         volatile unsigned long  *rp;
 552         volatile unsigned char  *bp;
 553         unsigned char           *dp = (unsigned char *) buf;
 554         unsigned int            a = (unsigned int) addr;
 555
 556 #ifdef DEBUGIO
 557         printk(KERN_DEBUG "pci_outsb(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
 558 #endif
 559
 560         rp = (volatile unsigned long *) COMEM_BASE;
 561         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
 562
 563         a = (a & ~0x3) + (~a & 0x03);
 564         bp = (volatile unsigned char *)
 565                 (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
 566
 567         while (len--)
 568                 *bp = *dp++;
 569 }
 570
 571 /*****************************************************************************/
 572
 573 void pci_outsw(void *addr, void *buf, int len)
 574 {
 575         volatile unsigned long  *rp;
 576         volatile unsigned short *wp;
 577         unsigned short          w, *dp = (unsigned short *) buf;
 578         unsigned int            a = (unsigned int) addr;
 579
 580 #ifdef DEBUGIO
 581         printk(KERN_DEBUG "pci_outsw(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
 582 #endif
 583
 584         rp = (volatile unsigned long *) COMEM_BASE;
 585         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
 586
 587         a = (a & ~0x3) + (~a & 0x2);
 588         wp = (volatile unsigned short *)
 589                 (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
 590
 591         while (len--) {
 592                 w = *dp++;
 593                 if (pci_byteswap)
 594                         w = ((w & 0xff) << 8) | ((w >> 8) & 0xff);
 595                 *wp = w;
 596         }
 597 }
 598
 599 /*****************************************************************************/
 600
 601 void pci_outsl(void *addr, void *buf, int len)
 602 {
 603         volatile unsigned long  *rp;
 604         volatile unsigned long  *lp;
 605         unsigned long           l, *dp = (unsigned long *) buf;
 606         unsigned int            a = (unsigned int) addr;
 607
 608 #ifdef DEBUGIO
 609         printk(KERN_DEBUG "pci_outsl(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
 610 #endif
 611
 612         rp = (volatile unsigned long *) COMEM_BASE;
 613         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
 614
 615         lp = (volatile unsigned long *)
 616                 (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
 617
 618         while (len--) {
 619                 l = *dp++;
 620                 if (pci_byteswap)
 621                         l = (l << 24) | ((l & 0x0000ff00) << 8) |
 622                                 ((l & 0x00ff0000) >> 8) | (l >> 24);
 623                 *lp = l;
 624         }
 625 }
 626
 627 /*****************************************************************************/
 628
 629 void pci_insb(void *addr, void *buf, int len)
 630 {
 631         volatile unsigned long  *rp;
 632         volatile unsigned char  *bp;
 633         unsigned char           *dp = (unsigned char *) buf;
 634         unsigned int            a = (unsigned int) addr;
 635
 636 #ifdef DEBUGIO
 637         printk(KERN_DEBUG "pci_insb(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
 638 #endif
 639
 640         rp = (volatile unsigned long *) COMEM_BASE;
 641         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
 642
 643         a = (a & ~0x3) + (~a & 0x03);
 644         bp = (volatile unsigned char *)
 645                 (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
 646
 647         while (len--)
 648                 *dp++ = *bp;
 649 }
 650
 651 /*****************************************************************************/
 652
 653 void pci_insw(void *addr, void *buf, int len)
 654 {
 655         volatile unsigned long  *rp;
 656         volatile unsigned short *wp;
 657         unsigned short          w, *dp = (unsigned short *) buf;
 658         unsigned int            a = (unsigned int) addr;
 659
 660 #ifdef DEBUGIO
 661         printk(KERN_DEBUG "pci_insw(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
 662 #endif
 663
 664         rp = (volatile unsigned long *) COMEM_BASE;
 665         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
 666
 667         a = (a & ~0x3) + (~a & 0x2);
 668         wp = (volatile unsigned short *)
 669                 (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
 670
 671         while (len--) {
 672                 w = *wp;
 673                 if (pci_byteswap)
 674                         w = ((w & 0xff) << 8) | ((w >> 8) & 0xff);
 675                 *dp++ = w;
 676         }
 677 }
 678
 679 /*****************************************************************************/
 680
 681 void pci_insl(void *addr, void *buf, int len)
 682 {
 683         volatile unsigned long  *rp;
 684         volatile unsigned long  *lp;
 685         unsigned long           l, *dp = (unsigned long *) buf;
 686         unsigned int            a = (unsigned int) addr;
 687
 688 #ifdef DEBUGIO
 689         printk(KERN_DEBUG "pci_insl(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
 690 #endif
 691
 692         rp = (volatile unsigned long *) COMEM_BASE;
 693         rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
 694
 695         lp = (volatile unsigned long *)
 696                 (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
 697
 698         while (len--) {
 699                 l = *lp;
 700                 if (pci_byteswap)
 701                         l = (l << 24) | ((l & 0x0000ff00) << 8) |
 702                                 ((l & 0x00ff0000) >> 8) | (l >> 24);
 703                 *dp++ = l;
 704         }
 705 }
 706
 707 /*****************************************************************************/
 708
 709 struct pci_localirqlist {
 710         void            (*handler)(int, void *, struct pt_regs *);
 711         const char      *device;
 712         void            *dev_id;
 713 };
 714
 715 struct pci_localirqlist pci_irqlist[COMEM_MAXPCI];
 716
 717 /*****************************************************************************/
 718
 719 int pci_request_irq(unsigned int irq,
 720         void (*handler)(int, void *, struct pt_regs *),
 721         unsigned long flags, const char *device, void *dev_id)
 722 {
 723         int     i;
 724
 725 #ifdef DEBUGIO
 726         printk(KERN_DEBUG "pci_request_irq(irq=%d,handler=%x,flags=%x,device=%s,"
 727                 "dev_id=%x)\n", irq, (int) handler, (int) flags, device,
 728                 (int) dev_id);
 729 #endif
 730
 731         /* Check if this interrupt handler is already lodged */
 732         for (i = 0; (i < COMEM_MAXPCI); i++) {
 733                 if (pci_irqlist[i].handler == handler)
 734                         return(0);
 735         }
 736
 737         /* Find a free spot to put this handler */
 738         for (i = 0; (i < COMEM_MAXPCI); i++) {
 739                 if (pci_irqlist[i].handler == 0) {
 740                         pci_irqlist[i].handler = handler;
 741                         pci_irqlist[i].device = device;
 742                         pci_irqlist[i].dev_id = dev_id;
 743                         return(0);
 744                 }
 745         }
 746
 747         /* Couldn't fit?? */
 748         return(1);
 749 }
 750
 751 /*****************************************************************************/
 752
 753 void pci_free_irq(unsigned int irq, void *dev_id)
 754 {
 755         int     i;
 756
 757 #ifdef DEBUGIO
 758         printk(KERN_DEBUG "pci_free_irq(irq=%d,dev_id=%x)\n", irq, (int) dev_id);
 759 #endif
 760
 761         if (dev_id == (void *) NULL)
 762                 return;
 763
 764         /* Check if this interrupt handler is lodged */
 765         for (i = 0; (i < COMEM_MAXPCI); i++) {
 766                 if (pci_irqlist[i].dev_id == dev_id) {
 767                         pci_irqlist[i].handler = NULL;
 768                         pci_irqlist[i].device = NULL;
 769                         pci_irqlist[i].dev_id = NULL;
 770                         break;
 771                 }
 772         }
 773 }
 774
 775 /*****************************************************************************/
 776
 777 void pci_interrupt(int irq, void *id, struct pt_regs *fp)
 778 {
 779         int     i;
 780
 781 #ifdef DEBUGIO
 782         printk(KERN_DEBUG "pci_interrupt(irq=%d,id=%x,fp=%x)\n", irq, (int) id, (int) fp);
 783 #endif
 784
 785         for (i = 0; (i < COMEM_MAXPCI); i++) {
 786                 if (pci_irqlist[i].handler)
 787                         (*pci_irqlist[i].handler)(irq,pci_irqlist[i].dev_id,fp);
 788         }
 789 }
 790
 791 /*****************************************************************************/
 792
 793 /*
 794  *      The shared memory region is broken up into contiguous 512 byte
 795  *      regions for easy allocation... This is not an optimal solution
 796  *      but it makes allocation and freeing regions really easy.
 797  */
 798
 799 #define PCI_MEMSLOTSIZE         512
 800 #define PCI_MEMSLOTS            (COMEM_SHMEMSIZE / PCI_MEMSLOTSIZE)
 801
 802 char    pci_shmemmap[PCI_MEMSLOTS];
 803
 804
 805 void *pci_bmalloc(int size)
 806 {
 807         int     i, j, nrslots;
 808
 809 #ifdef DEBUGIO
 810         printk(KERN_DEBUG "pci_bmalloc(size=%d)\n", size);
 811 #endif
 812
 813         if (size <= 0)
 814                 return((void *) NULL);
 815
 816         nrslots = (size - 1) / PCI_MEMSLOTSIZE;
 817
 818         for (i = 0; (i < (PCI_MEMSLOTS-nrslots)); i++) {
 819                 if (pci_shmemmap[i] == 0) {
 820                         for (j = i+1; (j < (i+nrslots)); j++) {
 821                                 if (pci_shmemmap[j])
 822                                         goto restart;
 823                         }
 824
 825                         for (j = i; (j <= i+nrslots); j++)
 826                                 pci_shmemmap[j] = 1;
 827                         break;
 828                 }
 829 restart:
 830         }
 831
 832         return((void *) (COMEM_BASE + COMEM_SHMEM + (i * PCI_MEMSLOTSIZE)));
 833 }
 834
 835 /*****************************************************************************/
 836
 837 void pci_bmfree(void *mp, int size)
 838 {
 839         int     i, j, nrslots;
 840
 841 #ifdef DEBUGIO
 842         printk(KERN_DEBUG "pci_bmfree(mp=%x,size=%d)\n", (int) mp, size);
 843 #endif
 844
 845         nrslots = size / PCI_MEMSLOTSIZE;
 846         i = (((unsigned long) mp) - (COMEM_BASE + COMEM_SHMEM)) /
 847                 PCI_MEMSLOTSIZE;
 848
 849         for (j = i; (j < (i+nrslots)); j++)
 850                 pci_shmemmap[j] = 0;
 851 }
 852
 853 /*****************************************************************************/
 854
 855 unsigned long pci_virt_to_bus(volatile void *address)
 856 {
 857         unsigned long   l;
 858
 859 #ifdef DEBUGIO
 860         printk(KERN_DEBUG "pci_virt_to_bus(address=%x)", (int) address);
 861 #endif
 862
 863         l = ((unsigned long) address) - COMEM_BASE;
 864 #ifdef DEBUGIO
 865         printk(KERN_DEBUG "=%x\n", (int) (l+pci_shmemaddr));
 866 #endif
 867         return(l + pci_shmemaddr);
 868 }
 869
 870 /*****************************************************************************/
 871
 872 void *pci_bus_to_virt(unsigned long address)
 873 {
 874         unsigned long   l;
 875
 876 #ifdef DEBUGIO
 877         printk(KERN_DEBUG "pci_bus_to_virt(address=%x)", (int) address);
 878 #endif
 879
 880         l = address - pci_shmemaddr;
 881 #ifdef DEBUGIO
 882         printk(KERN_DEBUG "=%x\n", (int) (address + COMEM_BASE));
 883 #endif
 884         return((void *) (address + COMEM_BASE));
 885 }
 886
 887 /*****************************************************************************/
 888
 889 void pci_bmcpyto(void *dst, void *src, int len)
 890 {
 891         unsigned long   *dp, *sp, val;
 892         unsigned char   *dcp, *scp;
 893         int             i, j;
 894
 895 #ifdef DEBUGIO
 896         printk(KERN_DEBUG "pci_bmcpyto(dst=%x,src=%x,len=%d)\n", (int)dst, (int)src, len);
 897 #endif
 898
 899         dp = (unsigned long *) dst;
 900         sp = (unsigned long *) src;
 901         i = len >> 2;
 902
 903 #if 0
 904         printk(KERN_INFO "DATA:");
 905         scp = (unsigned char *) sp;
 906         for (i = 0; (i < len); i++) {
 907                 if ((i % 16) == 0) printk(KERN_INFO "\n%04x: ", i);
 908                 printk(KERN_INFO "%02x ", *scp++);
 909         }
 910         printk(KERN_INFO "\n");
 911 #endif
 912
 913         for (j = 0; (i >= 0); i--, j++) {
 914                 val = *sp++;
 915                 val = (val << 24) | ((val & 0x0000ff00) << 8) |
 916                         ((val & 0x00ff0000) >> 8) | (val >> 24);
 917                 *dp++ = val;
 918         }
 919
 920         if (len & 0x3) {
 921                 dcp = (unsigned char *) dp;
 922                 scp = ((unsigned char *) sp) + 3;
 923                 for (i = 0; (i < (len & 0x3)); i++)
 924                         *dcp++ = *scp--;
 925         }
 926 }
 927
 928 /*****************************************************************************/
 929
 930 void pci_bmcpyfrom(void *dst, void *src, int len)
 931 {
 932         unsigned long   *dp, *sp, val;
 933         unsigned char   *dcp, *scp;
 934         int             i;
 935
 936 #ifdef DEBUGIO
 937         printk(KERN_DEBUG "pci_bmcpyfrom(dst=%x,src=%x,len=%d)\n",(int)dst,(int)src,len);
 938 #endif
 939
 940         dp = (unsigned long *) dst;
 941         sp = (unsigned long *) src;
 942         i = len >> 2;
 943
 944         for (; (i >= 0); i--) {
 945                 val = *sp++;
 946                 val = (val << 24) | ((val & 0x0000ff00) << 8) |
 947                         ((val & 0x00ff0000) >> 8) | (val >> 24);
 948                 *dp++ = val;
 949         }
 950
 951         if (len & 0x3) {
 952                 dcp = ((unsigned char *) dp) + 3;
 953                 scp = (unsigned char *) sp;
 954                 for (i = 0; (i < (len & 0x3)); i++)
 955                         *dcp++ = *scp--;
 956         }
 957
 958 #if 0
 959         printk(KERN_INFO "DATA:");
 960         dcp = (unsigned char *) dst;
 961         for (i = 0; (i < len); i++) {
 962                 if ((i % 16) == 0) printk(KERN_INFO "\n%04x: ", i);
 963                 printk(KERN_INFO "%02x ", *dcp++);
 964         }
 965         printk(KERN_INFO "\n");
 966 #endif
 967 }
 968
 969 /*****************************************************************************/
 970
 971 void *pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma_addr)
 972 {
 973         void *mp;
 974         if ((mp = pci_bmalloc(size)) != NULL) {
 975                 dma_addr = mp - (COMEM_BASE + COMEM_SHMEM);
 976                 return(mp);
 977         }
 978         *dma_addr = (dma_addr_t) NULL;
 979         return(NULL);
 980 }
 981
 982 /*****************************************************************************/
 983
 984 void pci_free_consistent(struct pci_dev *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr)
 985 {
 986         pci_bmfree(cpu_addr, size);
 987 }
 988
 989 /*****************************************************************************/