board/MAI/AmigaOneG3SE/articiaS_pci.c

   1 /*
   2  * (C) Copyright 2002
   3  * Hyperion Entertainment, Hans-JoergF@hyperion-entertainment.com
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <pci.h>
  26 #include "memio.h"
  27 #include "articiaS.h"
  28
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 #undef ARTICIA_PCI_DEBUG
  32
  33 #ifdef  ARTICIA_PCI_DEBUG
  34 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  35 #else
  36 #define PRINTF(fmt,args...)
  37 #endif
  38
  39 struct pci_controller articiaS_hose;
  40
  41 long irq_alloc(long wanted);
  42
  43 static pci_dev_t pci_hose_find_class(struct pci_controller *hose, int bus, short find_class, int index);
  44 static int articiaS_init_vga(void);
  45 static void pci_cfgfunc_dummy(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table);
  46 unsigned char pci_irq_alloc(void);
  47
  48 extern void via_cfgfunc_via686(struct pci_controller * host, pci_dev_t dev, struct pci_config_table *table);
  49 extern void via_cfgfunc_ide_init(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table);
  50 extern void via_init_irq_routing(uint8 []);
  51 extern void via_init_afterscan(void);
  52
  53 #define cfgfunc_via686      1
  54 #define cfgfunc_dummy  2
  55 #define cfgfunc_ide_init    3
  56
  57 static struct pci_config_table config_table[] =
  58 {
  59     {
  60         0x1106, PCI_ANY_ID, PCI_CLASS_BRIDGE_ISA, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
  61         (void *)cfgfunc_via686, {0, 0, 0}
  62     },
  63     {
  64         0x1106, PCI_ANY_ID, PCI_ANY_ID, 0,7,4,
  65         (void *)cfgfunc_dummy, {0,0,0}
  66     },
  67     {
  68         0x1106, 0x3068, PCI_ANY_ID, 0, 7, PCI_ANY_ID,
  69         (void *)cfgfunc_dummy, {0,0,0}
  70     },
  71     {
  72         0x1106, PCI_ANY_ID, PCI_ANY_ID, 0,7,1,
  73         (void *)cfgfunc_ide_init, {0,0,0}
  74     },
  75     {
  76         0,
  77     }
  78 };
  79
  80
  81 void pci_cfgfunc_dummy(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table)
  82 {
  83
  84
  85 }
  86
  87 unsigned long irq_penalties[16] =
  88 {
  89     1000,    /* 0:timer */
  90     1000,    /* 1:keyboard */
  91     1000,    /* 2:cascade */
  92     50,      /* 3:serial (COM2) */
  93     50,      /* 4:serial (COM1) */
  94     4,       /* 5:USB2 */
  95     100,     /* 6:floppy */
  96     3,       /* 7:parallel */
  97     50,      /* 8:AC97/MC97 */
  98     0,       /* 9: */
  99     3,       /* 10:: */
 100     0,       /* 11: */
 101     3,       /* 12: USB1 */
 102     0,       /* 13: */
 103     100,     /* 14: ide0 */
 104     100,     /* 15: ide1 */
 105 };
 106
 107
 108 /*
 109  * The following defines a hard-coded interrupt mapping for the
 110  * know devices on the board.
 111  * If a device isn't found here, assumed to be a device that's
 112  * plugged into a PCI or AGP slot
 113  * NOTE: This table is machine dependant.
 114  */
 115
 116 struct pci_irq_fixup_table
 117 {
 118     uint8   bus;             /* Bus number */
 119     uint8   device;          /* Device number */
 120     uint8   func;            /* Function number */
 121     uint8   interrupt;       /* Interrupt to use (0xff to disable) */
 122 };
 123
 124 struct pci_irq_fixup_table fixuptab [] =
 125 {
 126     { 0, 0, 0, 0xff},        /* Articia S host bridge */
 127     { 0, 1, 0, 0xff},        /* Articia S AGP bridge */
 128 /*    { 0, 6, 0, 0x05},        /###* 3COM ethernet */
 129     { 0, 7, 0, 0xff},        /* VIA southbridge */
 130     { 0, 7, 1, 0x0e},        /* IDE controller in legacy mode */
 131 /*    { 0, 7, 2, 0x05},        /###* First USB controller */
 132 /*    { 0, 7, 3, 0x0c},        /###* Second USB controller (shares interrupt with ethernet) */
 133     { 0, 7, 4, 0xff},        /* ACPI Power Management */
 134 /*    { 0, 7, 5, 0x08},        /###* AC97 */
 135 /*    { 0, 7, 6, 0x08},        /###* MC97 */
 136     { 0xff, 0xff, 0xff, 0xff}
 137 };
 138
 139
 140 /*
 141  * This table maps IRQ's to PCI interrupts
 142  */
 143
 144 uint8 pci_intmap[4] = {0, 0, 0, 0};
 145
 146 /*
 147  * Map PCI slots to interrupt routings
 148  * This table lists the device number assigned to a card inserted
 149  * into the slot, along with a permutation for the slot's IRQ routing.
 150  * NOTE: This table is machine dependant.
 151  */
 152
 153 struct pci_slot_irq_routing
 154 {
 155     uint8 bus;
 156     uint8 device;
 157
 158     uint8 ints[4];
 159 };
 160
 161 struct pci_slot_irq_routing amigaone_pci_routing[] =
 162 {
 163     {0,  8,   {0, 1, 2, 3}},       /* Slot 1 (left of riser slot) */
 164     {0,  9,   {1, 2, 3, 0}},       /* Slot 2 (middle slot) */
 165     {0, 10,   {2, 3, 0, 1}},       /* Slot 3 (leftmost slot) */
 166     {1,  0,   {1, 0, 2, 3}},       /* AGP slot (only IRQA and IRQB) */
 167     {1,  1,   {1, 2, 3, 0}},       /* PCI slot on AGP bus */
 168     {0,  6,   {3, 3, 3, 3}},       /* On board ethernet */
 169     {0,  7,   {0, 1, 2, 3}},       /* Southbridge */
 170     {0xff, 0, {0, 0, 0, 0}}
 171 };
 172
 173 void articiaS_pci_irq_init(void)
 174 {
 175     char *s;
 176
 177     s = getenv("pci_irqa");
 178     if (s)
 179         pci_intmap[0] = simple_strtoul (s, NULL, 10);
 180     else
 181         pci_intmap[0] = pci_irq_alloc();
 182
 183     s = getenv("pci_irqb");
 184     if (s)
 185         pci_intmap[1] = simple_strtoul (s, NULL, 10);
 186     else
 187         pci_intmap[1] = pci_irq_alloc();
 188
 189     s = getenv("pci_irqc");
 190     if (s)
 191         pci_intmap[2] = simple_strtoul (s, NULL, 10);
 192     else
 193         pci_intmap[2] = pci_irq_alloc();
 194
 195     s = getenv("pci_irqd");
 196     if (s)
 197         pci_intmap[3] = simple_strtoul (s, NULL, 10);
 198     else
 199         pci_intmap[3] = pci_irq_alloc();
 200 }
 201
 202
 203 unsigned char pci_irq_alloc(void)
 204 {
 205     int i;
 206     int interrupt = 10;
 207     unsigned long min_penalty = 1000;
 208
 209     /* Search for the minimal penalty, favoring interrupts at the end */
 210     for (i = 0; i < 16; i++)
 211     {
 212         if (irq_penalties[i] <= min_penalty)
 213         {
 214             interrupt = i;
 215             min_penalty = irq_penalties[i];
 216         }
 217     }
 218
 219     PRINTF("pci_irq_alloc: Minimal penalty is %ld for %d\n", min_penalty, interrupt);
 220
 221     irq_penalties[interrupt]++;
 222
 223     return interrupt;
 224 }
 225
 226
 227 void articiaS_pci_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
 228 {
 229     int8 bus, device, func, pin, line;
 230     int i;
 231
 232     bus = PCI_BUS(dev);
 233     device = PCI_DEV(dev);
 234     func = PCI_FUNC(dev);
 235
 236     PRINTF("Fixup irq of %d:%d.%d\n", bus, device, func);
 237
 238     /* Search for the device in the table */
 239     for (i = 0; fixuptab[i].bus != 0xff; i++)
 240     {
 241         if (bus == fixuptab[i].bus && device == fixuptab[i].device && func == fixuptab[i].func)
 242         {
 243             /* If the device needs an interrupt, write it */
 244             if (fixuptab[i].interrupt != 0xff)
 245             {
 246                 PRINTF("Assigning IRQ %d (fixed)\n", fixuptab[i].interrupt);
 247                 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, fixuptab[i].interrupt);
 248             }
 249             else
 250             {
 251                 /* Otherwise, see if it wants an interrupt, and disable it if needed */
 252                 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
 253                 if (pin)
 254                 {
 255                     PRINTF("Disabling IRQ\n");
 256                     pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 0xff);
 257                 }
 258             }
 259
 260             return;
 261         }
 262     }
 263
 264     /* If we get here, we have another PCI device in a slot... find the appropriate IRQ */
 265
 266     /* Find matching pin */
 267     pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
 268     pin--;
 269
 270     /* Search for it's map */
 271     for (i = 0; amigaone_pci_routing[i].bus != 0xff; i++)
 272     {
 273         if (bus == amigaone_pci_routing[i].bus && device == amigaone_pci_routing[i].device)
 274         {
 275             line = pci_intmap[amigaone_pci_routing[i].ints[pin]];
 276             PRINTF("Assigning IRQ %d (pin %d)\n", line, pin);
 277             pci_write_config_byte(dev, PCI_INTERRUPT_LINE, line);
 278             return;
 279         }
 280     }
 281
 282     PRINTF("Unkonwn PCI device found\n");
 283 }
 284
 285 void articiaS_pci_init (void)
 286 {
 287     int i;
 288     char *s;
 289
 290     PRINTF("atriciaS_pci_init\n");
 291
 292     /* Why aren't these relocated?? */
 293     for (i=0; config_table[i].config_device; i++)
 294     {
 295         switch((int)config_table[i].config_device)
 296         {
 297         case cfgfunc_via686:     config_table[i].config_device = via_cfgfunc_via686;      break;
 298         case cfgfunc_dummy:      config_table[i].config_device = pci_cfgfunc_dummy;       break;
 299         case cfgfunc_ide_init:   config_table[i].config_device = via_cfgfunc_ide_init;    break;
 300         default: PRINTF("Error: Unknown constant\n");
 301         }
 302     }
 303
 304     articiaS_hose.first_busno = 0;
 305     articiaS_hose.last_busno = 0xff;
 306     articiaS_hose.config_table = config_table;
 307     articiaS_hose.fixup_irq = articiaS_pci_fixup_irq;
 308
 309     articiaS_pci_irq_init();
 310
 311     /* System memory */
 312     pci_set_region(articiaS_hose.regions + 0,
 313                    ARTICIAS_SYS_BUS,
 314                    ARTICIAS_SYS_PHYS,
 315                    ARTICIAS_SYS_MAXSIZE,
 316                    PCI_REGION_MEM | PCI_REGION_MEMORY);
 317
 318     /* PCI memory space */
 319     pci_set_region(articiaS_hose.regions + 1,
 320                    ARTICIAS_PCI_BUS,
 321                    ARTICIAS_PCI_PHYS,
 322                    ARTICIAS_PCI_MAXSIZE,
 323                    PCI_REGION_MEM);
 324
 325     /* PCI io space */
 326     pci_set_region(articiaS_hose.regions + 2,
 327                    ARTICIAS_PCIIO_BUS,
 328                    ARTICIAS_PCIIO_PHYS,
 329                    ARTICIAS_PCIIO_MAXSIZE,
 330                    PCI_REGION_IO);
 331
 332     /* PCI/ISA io space */
 333     pci_set_region(articiaS_hose.regions + 3,
 334                    ARTICIAS_ISAIO_BUS,
 335                    ARTICIAS_ISAIO_PHYS,
 336                    ARTICIAS_ISAIO_MAXSIZE,
 337                    PCI_REGION_IO);
 338
 339
 340     articiaS_hose.region_count = 4;
 341
 342     pci_setup_indirect(&articiaS_hose, ARTICIAS_PCI_CFGADDR, ARTICIAS_PCI_CFGDATA);
 343     PRINTF("Registering articia hose...\n");
 344     pci_register_hose(&articiaS_hose);
 345     PRINTF("Enabling AGP...\n");
 346     pci_write_config_byte(PCI_BDF(0,0,0), 0x58, 0x01);
 347     PRINTF("Scanning bus...\n");
 348     articiaS_hose.last_busno = pci_hose_scan(&articiaS_hose);
 349
 350     via_init_irq_routing(pci_intmap);
 351
 352     PRINTF("After-Scan results:\n");
 353     PRINTF("Bus range: %d - %d\n", articiaS_hose.first_busno , articiaS_hose.last_busno);
 354
 355     via_init_afterscan();
 356
 357     pci_write_config_byte(PCI_BDF(0,1,0), PCI_INTERRUPT_LINE, 0xFF);
 358
 359     s = getenv("as_irq");
 360     if (s)
 361     {
 362         pci_write_config_byte(PCI_BDF(0,0,0), PCI_INTERRUPT_LINE, simple_strtoul (s, NULL, 10));
 363     }
 364
 365     s = getenv("x86_run_bios");
 366     if (!s || (s && strcmp(s, "on")==0))
 367     {
 368         if (articiaS_init_vga() == -1)
 369         {
 370             /* If the VGA didn't init and we have stdout set to VGA, reset to serial */
 371 /*          s = getenv("stdout"); */
 372 /*          if (s && strcmp(s, "vga") == 0) */
 373 /*          { */
 374 /*              setenv("stdout", "serial"); */
 375 /*          } */
 376         }
 377     }
 378     pci_write_config_byte(PCI_BDF(0,1,0), PCI_INTERRUPT_LINE, 0xFF);
 379
 380 }
 381
 382 pci_dev_t pci_hose_find_class(struct pci_controller *hose, int bus, short find_class, int index)
 383 {
 384     unsigned int sub_bus, found_multi=0;
 385     unsigned short vendor, class;
 386     unsigned char header_type;
 387     pci_dev_t dev;
 388     u8 c1, c2;
 389
 390     sub_bus = bus;
 391
 392     for (dev =  PCI_BDF(bus,0,0);
 393          dev <  PCI_BDF(bus,PCI_MAX_PCI_DEVICES-1,PCI_MAX_PCI_FUNCTIONS-1);
 394          dev += PCI_BDF(0,0,1))
 395     {
 396         if ( dev == PCI_BDF(hose->first_busno,0,0) )
 397             continue;
 398
 399         if (PCI_FUNC(dev) && !found_multi)
 400             continue;
 401
 402         pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type);
 403
 404         pci_hose_read_config_word(hose, dev, PCI_VENDOR_ID, &vendor);
 405
 406         if (vendor != 0xffff && vendor != 0x0000)
 407         {
 408
 409             if (!PCI_FUNC(dev))
 410                 found_multi = header_type & 0x80;
 411             pci_hose_read_config_byte(hose, dev, 0x0B, &c1);
 412             pci_hose_read_config_byte(hose, dev, 0x0A, &c2);
 413             class = c1<<8 | c2;
 414             /*printf("At %02x:%02x:%02x: class %x\n", */
 415             /*     PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev), class); */
 416             if (class == find_class)
 417             {
 418                 if (index == 0)
 419                     return dev;
 420                 else index--;
 421             }
 422         }
 423     }
 424
 425     return ~0;
 426 }
 427
 428
 429 /*
 430  * For a given bus number, find the bridge on this hose that provides this
 431  * bus number. The function scans for bridges and peeks config space offset
 432  * 0x19 (PCI_SECONDARY_BUS).
 433  */
 434 pci_dev_t pci_find_bridge_for_bus(struct pci_controller *hose, int busnr)
 435 {
 436     pci_dev_t dev;
 437     int bus;
 438     unsigned int found_multi=0;
 439     unsigned char header_type;
 440     unsigned short vendor;
 441     unsigned char secondary_bus;
 442
 443     if (hose == NULL) hose = &articiaS_hose;
 444
 445     if (busnr < hose->first_busno || busnr > hose->last_busno) return PCI_ANY_ID; /* Not in range */
 446
 447     /*
 448      * The bridge must be on a lower bus number
 449      */
 450     for (bus = hose->first_busno; bus < busnr; bus++)
 451     {
 452         for (dev =  PCI_BDF(bus,0,0);
 453              dev <  PCI_BDF(bus,PCI_MAX_PCI_DEVICES-1,PCI_MAX_PCI_FUNCTIONS-1);
 454              dev += PCI_BDF(0,0,1))
 455         {
 456             if ( dev == PCI_BDF(hose->first_busno,0,0) )
 457                 continue;
 458
 459             if (PCI_FUNC(dev) && !found_multi)
 460                 continue;
 461
 462             pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type);
 463
 464             pci_hose_read_config_word(hose, dev, PCI_VENDOR_ID, &vendor);
 465
 466             if (vendor != 0xffff && vendor != 0x0000)
 467             {
 468
 469                 if (!PCI_FUNC(dev))
 470                     found_multi = header_type & 0x80;
 471                 if (header_type == 1) /* Bridge device header */
 472                 {
 473                     pci_hose_read_config_byte(hose, dev, PCI_SECONDARY_BUS, &secondary_bus);
 474                     if ((int)secondary_bus == busnr) return dev;
 475                 }
 476
 477             }
 478         }
 479     }
 480     return PCI_ANY_ID;
 481 }
 482
 483 static short classes[] =
 484 {
 485     PCI_CLASS_DISPLAY_VGA,
 486     PCI_CLASS_DISPLAY_XGA,
 487     PCI_CLASS_DISPLAY_3D,
 488     PCI_CLASS_DISPLAY_OTHER,
 489     ~0
 490 };
 491
 492 extern int execute_bios(pci_dev_t gr_dev, void *);
 493
 494 pci_dev_t video_dev;
 495
 496 int articiaS_init_vga (void)
 497 {
 498     extern void shutdown_bios(void);
 499     pci_dev_t dev = ~0;
 500     int busnr = 0;
 501     int classnr = 0;
 502
 503     video_dev = PCI_ANY_ID;
 504
 505     printf("VGA:   ");
 506
 507     PRINTF("Trying to initialize x86 VGA Card(s)\n");
 508
 509     while (dev == ~0)
 510     {
 511         PRINTF("Searching for class 0x%x on bus %d\n", classes[classnr], busnr);
 512         /* Find the first of this class on this bus */
 513         dev = pci_hose_find_class(&articiaS_hose, busnr, classes[classnr], 0);
 514         if (dev != ~0)
 515         {
 516             PRINTF("Found VGA Card at %02x:%02x:%02x\n", PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev));
 517             break;
 518         }
 519         busnr++;
 520         if (busnr > articiaS_hose.last_busno)
 521         {
 522             busnr = 0;
 523             classnr ++;
 524             if (classes[classnr] == ~0)
 525             {
 526                 printf("NOT PRESENT\n");
 527                 return -1;
 528             }
 529         }
 530     }
 531
 532     /*
 533      * If we get here we have found the first graphics card.
 534      * If the bus number is not 0, then it is probably behind a bridge, and the
 535      * bridge needs to be told to forward VGA access.
 536      */
 537
 538     if (PCI_BUS(dev) != 0)
 539     {
 540         pci_dev_t bridge;
 541         PRINTF("Behind bridge, looking for bridge\n");
 542         bridge = pci_find_bridge_for_bus(&articiaS_hose, PCI_BUS(dev));
 543         if (dev != PCI_ANY_ID)
 544         {
 545             unsigned char agp_control_0;
 546             PRINTF("Got the bridge at %02x:%02x:%02x\n",
 547                    PCI_BUS(bridge), PCI_DEV(bridge), PCI_FUNC(bridge));
 548             pci_hose_read_config_byte(&articiaS_hose, bridge, 0x3E, &agp_control_0);
 549             agp_control_0 |= 0x18;
 550             pci_hose_write_config_byte(&articiaS_hose, bridge, 0x3E, agp_control_0);
 551             PRINTF("Configured for VGA forwarding\n");
 552         }
 553     }
 554
 555     /*
 556      * Now try to run the bios
 557      */
 558     PRINTF("Trying to run bios now\n");
 559     if (execute_bios(dev, gd->relocaddr))
 560     {
 561         printf("OK\n");
 562         video_dev = dev;
 563     }
 564     else
 565     {
 566         printf("ERROR\n");
 567     }
 568
 569     PRINTF("Done scanning.\n");
 570
 571     shutdown_bios();
 572
 573     if (dev == PCI_ANY_ID) return -1;
 574     else return 0;
 575
 576 }