cmd/tsi148.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2009 Reinhard Arlt, reinhard.arlt@esd-electronics.com
   4  *
   5  * base on universe.h by
   6  *
   7  * (C) Copyright 2003 Stefan Roese, stefan.roese@esd-electronics.com
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <log.h>
  13 #include <malloc.h>
  14 #include <asm/io.h>
  15 #include <pci.h>
  16
  17 #include <tsi148.h>
  18
  19 #define LPCI_VENDOR PCI_VENDOR_ID_TUNDRA
  20 #define LPCI_DEVICE PCI_DEVICE_ID_TUNDRA_TSI148
  21
  22 typedef struct _TSI148_DEV TSI148_DEV;
  23
  24 struct _TSI148_DEV {
  25         int           bus;
  26         pci_dev_t     busdevfn;
  27         TSI148       *uregs;
  28         unsigned int  pci_bs;
  29 };
  30
  31 static TSI148_DEV *dev;
  32
  33 /*
  34  * Most of the TSI148 register are BIGENDIAN
  35  * This is the reason for the __raw_writel(htonl(x), x) usage!
  36  */
  37
  38 int tsi148_init(void)
  39 {
  40         int j, result;
  41         pci_dev_t busdevfn;
  42         unsigned int val;
  43
  44         busdevfn = pci_find_device(LPCI_VENDOR, LPCI_DEVICE, 0);
  45         if (busdevfn == -1) {
  46                 puts("Tsi148: No Tundra Tsi148 found!\n");
  47                 return -1;
  48         }
  49
  50         /* Lets turn Latency off */
  51         pci_write_config_dword(busdevfn, 0x0c, 0);
  52
  53         dev = malloc(sizeof(*dev));
  54         if (NULL == dev) {
  55                 puts("Tsi148: No memory!\n");
  56                 return -1;
  57         }
  58
  59         memset(dev, 0, sizeof(*dev));
  60         dev->busdevfn = busdevfn;
  61
  62         pci_read_config_dword(busdevfn, PCI_BASE_ADDRESS_0, &val);
  63         val &= ~0xf;
  64         dev->uregs = (TSI148 *)val;
  65
  66         debug("Tsi148: Base    : %p\n", dev->uregs);
  67
  68         /* check mapping */
  69         debug("Tsi148: Read via mapping, PCI_ID = %08X\n",
  70               readl(&dev->uregs->pci_id));
  71         if (((LPCI_DEVICE << 16) | LPCI_VENDOR) != readl(&dev->uregs->pci_id)) {
  72                 printf("Tsi148: Cannot read PCI-ID via Mapping: %08x\n",
  73                        readl(&dev->uregs->pci_id));
  74                 result = -1;
  75                 goto break_30;
  76         }
  77
  78         debug("Tsi148: PCI_BS = %08X\n", readl(&dev->uregs->pci_mbarl));
  79
  80         dev->pci_bs = readl(&dev->uregs->pci_mbarl);
  81
  82         /* turn off windows */
  83         for (j = 0; j < 8; j++) {
  84                 __raw_writel(htonl(0x00000000), &dev->uregs->outbound[j].otat);
  85                 __raw_writel(htonl(0x00000000), &dev->uregs->inbound[j].itat);
  86         }
  87
  88         /* Tsi148 VME timeout etc */
  89         __raw_writel(htonl(0x00000084), &dev->uregs->vctrl);
  90
  91 #ifdef DEBUG
  92         if ((__raw_readl(&dev->uregs->vstat) & 0x00000100) != 0)
  93                 printf("Tsi148: System Controller!\n");
  94         else
  95                 printf("Tsi148: Not System Controller!\n");
  96 #endif
  97
  98         /*
  99          * Lets turn off interrupts
 100          */
 101         /* Disable interrupts in Tsi148 first */
 102         __raw_writel(htonl(0x00000000), &dev->uregs->inten);
 103         /* Disable interrupt out */
 104         __raw_writel(htonl(0x00000000), &dev->uregs->inteo);
 105         eieio();
 106         /* Reset all IRQ's */
 107         __raw_writel(htonl(0x03ff3f00), &dev->uregs->intc);
 108         /* Map all ints to 0 */
 109         __raw_writel(htonl(0x00000000), &dev->uregs->intm1);
 110         __raw_writel(htonl(0x00000000), &dev->uregs->intm2);
 111         eieio();
 112
 113         val = __raw_readl(&dev->uregs->vstat);
 114         val &= ~(0x00004000);
 115         __raw_writel(val, &dev->uregs->vstat);
 116         eieio();
 117
 118         debug("Tsi148: register struct size %08x\n", sizeof(TSI148));
 119
 120         return 0;
 121
 122  break_30:
 123         free(dev);
 124         dev = NULL;
 125
 126         return result;
 127 }
 128
 129 /*
 130  * Create pci slave window (access: pci -> vme)
 131  */
 132 int tsi148_pci_slave_window(unsigned int pciAddr, unsigned int vmeAddr,
 133                             int size, int vam, int vdw)
 134 {
 135         int result, i;
 136         unsigned int ctl = 0;
 137
 138         if (NULL == dev) {
 139                 result = -1;
 140                 goto exit_10;
 141         }
 142
 143         for (i = 0; i < 8; i++) {
 144                 if (0x00000000 == readl(&dev->uregs->outbound[i].otat))
 145                         break;
 146         }
 147
 148         if (i > 7) {
 149                 printf("Tsi148: No Image available\n");
 150                 result = -1;
 151                 goto exit_10;
 152         }
 153
 154         debug("Tsi148: Using image %d\n", i);
 155
 156         printf("Tsi148: Pci addr %08x\n", pciAddr);
 157
 158         __raw_writel(htonl(pciAddr), &dev->uregs->outbound[i].otsal);
 159         __raw_writel(0x00000000, &dev->uregs->outbound[i].otsau);
 160         __raw_writel(htonl(pciAddr + size), &dev->uregs->outbound[i].oteal);
 161         __raw_writel(0x00000000, &dev->uregs->outbound[i].oteau);
 162         __raw_writel(htonl(vmeAddr - pciAddr), &dev->uregs->outbound[i].otofl);
 163         __raw_writel(0x00000000, &dev->uregs->outbound[i].otofu);
 164
 165         switch (vam & VME_AM_Axx) {
 166         case VME_AM_A16:
 167                 ctl = 0x00000000;
 168                 break;
 169         case VME_AM_A24:
 170                 ctl = 0x00000001;
 171                 break;
 172         case VME_AM_A32:
 173                 ctl = 0x00000002;
 174                 break;
 175         }
 176
 177         switch (vam & VME_AM_Mxx) {
 178         case VME_AM_DATA:
 179                 ctl |= 0x00000000;
 180                 break;
 181         case VME_AM_PROG:
 182                 ctl |= 0x00000010;
 183                 break;
 184         }
 185
 186         if (vam & VME_AM_SUP)
 187                 ctl |= 0x00000020;
 188
 189         switch (vdw & VME_FLAG_Dxx) {
 190         case VME_FLAG_D16:
 191                 ctl |= 0x00000000;
 192                 break;
 193         case VME_FLAG_D32:
 194                 ctl |= 0x00000040;
 195                 break;
 196         }
 197
 198         ctl |= 0x80040000;      /* enable, no prefetch */
 199
 200         __raw_writel(htonl(ctl), &dev->uregs->outbound[i].otat);
 201
 202         debug("Tsi148: window-addr                =%p\n",
 203               &dev->uregs->outbound[i].otsau);
 204         debug("Tsi148: pci slave window[%d] attr  =%08x\n",
 205               i, ntohl(__raw_readl(&dev->uregs->outbound[i].otat)));
 206         debug("Tsi148: pci slave window[%d] start =%08x\n",
 207               i, ntohl(__raw_readl(&dev->uregs->outbound[i].otsal)));
 208         debug("Tsi148: pci slave window[%d] end   =%08x\n",
 209               i, ntohl(__raw_readl(&dev->uregs->outbound[i].oteal)));
 210         debug("Tsi148: pci slave window[%d] offset=%08x\n",
 211               i, ntohl(__raw_readl(&dev->uregs->outbound[i].otofl)));
 212
 213         return 0;
 214
 215  exit_10:
 216         return -result;
 217 }
 218
 219 unsigned int tsi148_eval_vam(int vam)
 220 {
 221         unsigned int ctl = 0;
 222
 223         switch (vam & VME_AM_Axx) {
 224         case VME_AM_A16:
 225                 ctl = 0x00000000;
 226                 break;
 227         case VME_AM_A24:
 228                 ctl = 0x00000010;
 229                 break;
 230         case VME_AM_A32:
 231                 ctl = 0x00000020;
 232                 break;
 233         }
 234         switch (vam & VME_AM_Mxx) {
 235         case VME_AM_DATA:
 236                 ctl |= 0x00000001;
 237                 break;
 238         case VME_AM_PROG:
 239                 ctl |= 0x00000002;
 240                 break;
 241         case (VME_AM_PROG | VME_AM_DATA):
 242                 ctl |= 0x00000003;
 243                 break;
 244         }
 245
 246         if (vam & VME_AM_SUP)
 247                 ctl |= 0x00000008;
 248         if (vam & VME_AM_USR)
 249                 ctl |= 0x00000004;
 250
 251         return ctl;
 252 }
 253
 254 /*
 255  * Create vme slave window (access: vme -> pci)
 256  */
 257 int tsi148_vme_slave_window(unsigned int vmeAddr, unsigned int pciAddr,
 258                             int size, int vam)
 259 {
 260         int result, i;
 261         unsigned int ctl = 0;
 262
 263         if (NULL == dev) {
 264                 result = -1;
 265                 goto exit_10;
 266         }
 267
 268         for (i = 0; i < 8; i++) {
 269                 if (0x00000000 == readl(&dev->uregs->inbound[i].itat))
 270                         break;
 271         }
 272
 273         if (i > 7) {
 274                 printf("Tsi148: No Image available\n");
 275                 result = -1;
 276                 goto exit_10;
 277         }
 278
 279         debug("Tsi148: Using image %d\n", i);
 280
 281         __raw_writel(htonl(vmeAddr), &dev->uregs->inbound[i].itsal);
 282         __raw_writel(0x00000000, &dev->uregs->inbound[i].itsau);
 283         __raw_writel(htonl(vmeAddr + size), &dev->uregs->inbound[i].iteal);
 284         __raw_writel(0x00000000, &dev->uregs->inbound[i].iteau);
 285         __raw_writel(htonl(pciAddr - vmeAddr), &dev->uregs->inbound[i].itofl);
 286         if (vmeAddr > pciAddr)
 287                 __raw_writel(0xffffffff, &dev->uregs->inbound[i].itofu);
 288         else
 289                 __raw_writel(0x00000000, &dev->uregs->inbound[i].itofu);
 290
 291         ctl = tsi148_eval_vam(vam);
 292         ctl |= 0x80000000;      /* enable */
 293         __raw_writel(htonl(ctl), &dev->uregs->inbound[i].itat);
 294
 295         debug("Tsi148: window-addr                =%p\n",
 296               &dev->uregs->inbound[i].itsau);
 297         debug("Tsi148: vme slave window[%d] attr  =%08x\n",
 298               i, ntohl(__raw_readl(&dev->uregs->inbound[i].itat)));
 299         debug("Tsi148: vme slave window[%d] start =%08x\n",
 300               i, ntohl(__raw_readl(&dev->uregs->inbound[i].itsal)));
 301         debug("Tsi148: vme slave window[%d] end   =%08x\n",
 302               i, ntohl(__raw_readl(&dev->uregs->inbound[i].iteal)));
 303         debug("Tsi148: vme slave window[%d] offset=%08x\n",
 304               i, ntohl(__raw_readl(&dev->uregs->inbound[i].itofl)));
 305
 306         return 0;
 307
 308  exit_10:
 309         return -result;
 310 }
 311
 312 /*
 313  * Create vme slave window (access: vme -> gcsr)
 314  */
 315 int tsi148_vme_gcsr_window(unsigned int vmeAddr, int vam)
 316 {
 317         int result;
 318         unsigned int ctl;
 319
 320         result = 0;
 321
 322         if (NULL == dev) {
 323                 result = 1;
 324         } else {
 325                 __raw_writel(htonl(vmeAddr), &dev->uregs->gbal);
 326                 __raw_writel(0x00000000, &dev->uregs->gbau);
 327
 328                 ctl = tsi148_eval_vam(vam);
 329                 ctl |= 0x00000080;      /* enable */
 330                 __raw_writel(htonl(ctl), &dev->uregs->gcsrat);
 331         }
 332
 333         return result;
 334 }
 335
 336 /*
 337  * Create vme slave window (access: vme -> crcsr)
 338  */
 339 int tsi148_vme_crcsr_window(unsigned int vmeAddr)
 340 {
 341         int result;
 342         unsigned int ctl;
 343
 344         result = 0;
 345
 346         if (NULL == dev) {
 347                 result = 1;
 348         } else {
 349                 __raw_writel(htonl(vmeAddr), &dev->uregs->crol);
 350                 __raw_writel(0x00000000, &dev->uregs->crou);
 351
 352                 ctl = 0x00000080;       /* enable */
 353                 __raw_writel(htonl(ctl), &dev->uregs->crat);
 354         }
 355
 356         return result;
 357 }
 358
 359 /*
 360  * Create vme slave window (access: vme -> crg)
 361  */
 362 int tsi148_vme_crg_window(unsigned int vmeAddr, int vam)
 363 {
 364         int result;
 365         unsigned int ctl;
 366
 367         result = 0;
 368
 369         if (NULL == dev) {
 370                 result = 1;
 371         } else {
 372                 __raw_writel(htonl(vmeAddr), &dev->uregs->cbal);
 373                 __raw_writel(0x00000000, &dev->uregs->cbau);
 374
 375                 ctl = tsi148_eval_vam(vam);
 376                 ctl |= 0x00000080;      /* enable */
 377                 __raw_writel(htonl(ctl), &dev->uregs->crgat);
 378         }
 379
 380         return result;
 381 }
 382
 383 /*
 384  * Tundra Tsi148 configuration
 385  */
 386 int do_tsi148(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 387 {
 388         ulong addr1 = 0, addr2 = 0, size = 0, vam = 0, vdw = 0;
 389         char cmd = 'x';
 390
 391         /* get parameter */
 392         if (argc > 1)
 393                 cmd = argv[1][0];
 394         if (argc > 2)
 395                 addr1 = simple_strtoul(argv[2], NULL, 16);
 396         if (argc > 3)
 397                 addr2 = simple_strtoul(argv[3], NULL, 16);
 398         if (argc > 4)
 399                 size = simple_strtoul(argv[4], NULL, 16);
 400         if (argc > 5)
 401                 vam = simple_strtoul(argv[5], NULL, 16);
 402         if (argc > 6)
 403                 vdw = simple_strtoul(argv[6], NULL, 16);
 404
 405         switch (cmd) {
 406         case 'c':
 407                 if (strcmp(argv[1], "crg") == 0) {
 408                         vam = addr2;
 409                         printf("Tsi148: Configuring VME CRG Window "
 410                                "(VME->CRG):\n");
 411                         printf("  vme=%08lx vam=%02lx\n", addr1, vam);
 412                         tsi148_vme_crg_window(addr1, vam);
 413                 } else {
 414                         printf("Tsi148: Configuring VME CR/CSR Window "
 415                                "(VME->CR/CSR):\n");
 416                         printf("  pci=%08lx\n", addr1);
 417                         tsi148_vme_crcsr_window(addr1);
 418                 }
 419                 break;
 420         case 'i':               /* init */
 421                 tsi148_init();
 422                 break;
 423         case 'g':
 424                 vam = addr2;
 425                 printf("Tsi148: Configuring VME GCSR Window (VME->GCSR):\n");
 426                 printf("  vme=%08lx vam=%02lx\n", addr1, vam);
 427                 tsi148_vme_gcsr_window(addr1, vam);
 428                 break;
 429         case 'v':               /* vme */
 430                 printf("Tsi148: Configuring VME Slave Window (VME->PCI):\n");
 431                 printf("  vme=%08lx pci=%08lx size=%08lx vam=%02lx\n",
 432                        addr1, addr2, size, vam);
 433                 tsi148_vme_slave_window(addr1, addr2, size, vam);
 434                 break;
 435         case 'p':               /* pci */
 436                 printf("Tsi148: Configuring PCI Slave Window (PCI->VME):\n");
 437                 printf("  pci=%08lx vme=%08lx size=%08lx vam=%02lx vdw=%02lx\n",
 438                        addr1, addr2, size, vam, vdw);
 439                 tsi148_pci_slave_window(addr1, addr2, size, vam, vdw);
 440                 break;
 441         default:
 442                 printf("Tsi148: Command %s not supported!\n", argv[1]);
 443         }
 444
 445         return 0;
 446 }
 447
 448 U_BOOT_CMD(
 449         tsi148, 7,      1,      do_tsi148,
 450         "initialize and configure Turndra Tsi148\n",
 451         "init\n"
 452         "    - initialize tsi148\n"
 453         "tsi148 vme   [vme_addr] [pci_addr] [size] [vam]\n"
 454         "    - create vme slave window (access: vme->pci)\n"
 455         "tsi148 pci   [pci_addr] [vme_addr] [size] [vam] [vdw]\n"
 456         "    - create pci slave window (access: pci->vme)\n"
 457         "tsi148 crg   [vme_addr] [vam]\n"
 458         "    - create vme slave window: (access vme->CRG\n"
 459         "tsi148 crcsr [pci_addr]\n"
 460         "    - create vme slave window: (access vme->CR/CSR\n"
 461         "tsi148 gcsr  [vme_addr] [vam]\n"
 462         "    - create vme slave window: (access vme->GCSR\n"
 463         "    [vam] = VMEbus Address-Modifier:  01 -> A16 Address Space\n"
 464         "                                      02 -> A24 Address Space\n"
 465         "                                      03 -> A32 Address Space\n"
 466         "                                      04 -> Usr        AM Code\n"
 467         "                                      08 -> Supervisor AM Code\n"
 468         "                                      10 -> Data AM Code\n"
 469         "                                      20 -> Program AM Code\n"
 470         "    [vdw] = VMEbus Maximum Datawidth: 02 -> D16 Data Width\n"
 471         "                                      03 -> D32 Data Width\n"
 472 );