cmd/universe.c

   1 /*
   2  * (C) Copyright 2003 Stefan Roese, stefan.roese@esd-electronics.com
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <malloc.h>
  10 #include <asm/io.h>
  11 #include <pci.h>
  12
  13 #include <universe.h>
  14
  15 #define PCI_VENDOR PCI_VENDOR_ID_TUNDRA
  16 #define PCI_DEVICE PCI_DEVICE_ID_TUNDRA_CA91C042
  17
  18
  19 typedef struct _UNI_DEV UNI_DEV;
  20
  21 struct _UNI_DEV {
  22         int            bus;
  23         pci_dev_t      busdevfn;
  24         UNIVERSE       *uregs;
  25         unsigned int   pci_bs;
  26 };
  27
  28 static UNI_DEV   *dev;
  29
  30
  31 int universe_init(void)
  32 {
  33         int j, result;
  34         pci_dev_t busdevfn;
  35         unsigned int val;
  36
  37         busdevfn = pci_find_device(PCI_VENDOR, PCI_DEVICE, 0);
  38         if (busdevfn == -1) {
  39                 puts("No Tundra Universe found!\n");
  40                 return -1;
  41         }
  42
  43         /* Lets turn Latency off */
  44         pci_write_config_dword(busdevfn, 0x0c, 0);
  45
  46         dev = malloc(sizeof(*dev));
  47         if (NULL == dev) {
  48                 puts("UNIVERSE: No memory!\n");
  49                 result = -1;
  50                 goto break_20;
  51         }
  52
  53         memset(dev, 0, sizeof(*dev));
  54         dev->busdevfn = busdevfn;
  55
  56         pci_read_config_dword(busdevfn, PCI_BASE_ADDRESS_1, &val);
  57         if (val & 1) {
  58                 pci_read_config_dword(busdevfn, PCI_BASE_ADDRESS_0, &val);
  59         }
  60         val &= ~0xf;
  61         dev->uregs = (UNIVERSE *)val;
  62
  63         debug ("UNIVERSE-Base    : %p\n", dev->uregs);
  64
  65         /* check mapping  */
  66         debug (" Read via mapping, PCI_ID = %08X\n", readl(&dev->uregs->pci_id));
  67         if (((PCI_DEVICE <<16) | PCI_VENDOR) !=  readl(&dev->uregs->pci_id)) {
  68                 printf ("UNIVERSE: Cannot read PCI-ID via Mapping: %08x\n",
  69                         readl(&dev->uregs->pci_id));
  70                 result = -1;
  71                 goto break_30;
  72         }
  73
  74         debug ("PCI_BS = %08X\n", readl(&dev->uregs->pci_bs));
  75
  76         dev->pci_bs = readl(&dev->uregs->pci_bs);
  77
  78         /* turn off windows */
  79         for (j=0; j <4; j ++) {
  80                 writel(0x00800000, &dev->uregs->lsi[j].ctl);
  81                 writel(0x00800000, &dev->uregs->vsi[j].ctl);
  82         }
  83
  84         /*
  85          * Write to Misc Register
  86          * Set VME Bus Time-out
  87          *   Arbitration Mode
  88          *   DTACK Enable
  89          */
  90         writel(0x15040000 | (readl(&dev->uregs->misc_ctl) & 0x00020000), &dev->uregs->misc_ctl);
  91
  92         if (readl(&dev->uregs->misc_ctl) & 0x00020000) {
  93                 debug ("System Controller!\n"); /* test-only */
  94         } else {
  95                 debug ("Not System Controller!\n"); /* test-only */
  96         }
  97
  98         /*
  99          * Lets turn off interrupts
 100          */
 101         writel(0x00000000,&dev->uregs->lint_en);   /* Disable interrupts in the Universe first */
 102         writel(0x0000FFFF,&dev->uregs->lint_stat); /* Clear Any Pending Interrupts */
 103         eieio();
 104         writel(0x0000, &dev->uregs->lint_map0);  /* Map all ints to 0 */
 105         writel(0x0000, &dev->uregs->lint_map1);  /* Map all ints to 0 */
 106         eieio();
 107
 108         return 0;
 109
 110  break_30:
 111         free(dev);
 112  break_20:
 113         return result;
 114 }
 115
 116
 117 /*
 118  * Create pci slave window (access: pci -> vme)
 119  */
 120 int universe_pci_slave_window(unsigned int pciAddr, unsigned int vmeAddr, int size, int vam, int pms, int vdw)
 121 {
 122         int result, i;
 123         unsigned int ctl = 0;
 124
 125         if (NULL == dev) {
 126                 result = -1;
 127                 goto exit_10;
 128         }
 129
 130         for (i = 0; i < 4; i++) {
 131                 if (0x00800000 == readl(&dev->uregs->lsi[i].ctl))
 132                         break;
 133         }
 134
 135         if (i == 4) {
 136                 printf ("universe: No Image available\n");
 137                 result = -1;
 138                 goto exit_10;
 139         }
 140
 141         debug ("universe: Using image %d\n", i);
 142
 143         writel(pciAddr , &dev->uregs->lsi[i].bs);
 144         writel((pciAddr + size), &dev->uregs->lsi[i].bd);
 145         writel((vmeAddr - pciAddr), &dev->uregs->lsi[i].to);
 146
 147         switch (vam & VME_AM_Axx) {
 148         case VME_AM_A16:
 149                 ctl = 0x00000000;
 150                 break;
 151         case VME_AM_A24:
 152                 ctl = 0x00010000;
 153                 break;
 154         case VME_AM_A32:
 155                 ctl = 0x00020000;
 156                 break;
 157         }
 158
 159         switch (vam & VME_AM_Mxx) {
 160         case VME_AM_DATA:
 161                 ctl |= 0x00000000;
 162                 break;
 163         case VME_AM_PROG:
 164                 ctl |= 0x00008000;
 165                 break;
 166         }
 167
 168         if (vam & VME_AM_SUP) {
 169                 ctl |= 0x00001000;
 170
 171         }
 172
 173         switch (vdw & VME_FLAG_Dxx) {
 174         case VME_FLAG_D8:
 175                 ctl |= 0x00000000;
 176                 break;
 177         case VME_FLAG_D16:
 178                 ctl |= 0x00400000;
 179                 break;
 180         case VME_FLAG_D32:
 181                 ctl |= 0x00800000;
 182                 break;
 183         }
 184
 185         switch (pms & PCI_MS_Mxx) {
 186         case PCI_MS_MEM:
 187                 ctl |= 0x00000000;
 188                 break;
 189         case PCI_MS_IO:
 190                 ctl |= 0x00000001;
 191                 break;
 192         case PCI_MS_CONFIG:
 193                 ctl |= 0x00000002;
 194                 break;
 195         }
 196
 197         ctl |= 0x80000000;    /* enable */
 198
 199         writel(ctl, &dev->uregs->lsi[i].ctl);
 200
 201         debug ("universe: window-addr=%p\n", &dev->uregs->lsi[i].ctl);
 202         debug ("universe: pci slave window[%d] ctl=%08x\n", i, readl(&dev->uregs->lsi[i].ctl));
 203         debug ("universe: pci slave window[%d] bs=%08x\n", i, readl(&dev->uregs->lsi[i].bs));
 204         debug ("universe: pci slave window[%d] bd=%08x\n", i, readl(&dev->uregs->lsi[i].bd));
 205         debug ("universe: pci slave window[%d] to=%08x\n", i, readl(&dev->uregs->lsi[i].to));
 206
 207         return 0;
 208
 209  exit_10:
 210         return -result;
 211 }
 212
 213
 214 /*
 215  * Create vme slave window (access: vme -> pci)
 216  */
 217 int universe_vme_slave_window(unsigned int vmeAddr, unsigned int pciAddr, int size, int vam, int pms)
 218 {
 219         int result, i;
 220         unsigned int ctl = 0;
 221
 222         if (NULL == dev) {
 223                 result = -1;
 224                 goto exit_10;
 225         }
 226
 227         for (i = 0; i < 4; i++) {
 228                 if (0x00800000 == readl(&dev->uregs->vsi[i].ctl))
 229                         break;
 230         }
 231
 232         if (i == 4) {
 233                 printf ("universe: No Image available\n");
 234                 result = -1;
 235                 goto exit_10;
 236         }
 237
 238         debug ("universe: Using image %d\n", i);
 239
 240         writel(vmeAddr , &dev->uregs->vsi[i].bs);
 241         writel((vmeAddr + size), &dev->uregs->vsi[i].bd);
 242         writel((pciAddr - vmeAddr), &dev->uregs->vsi[i].to);
 243
 244         switch (vam & VME_AM_Axx) {
 245         case VME_AM_A16:
 246                 ctl = 0x00000000;
 247                 break;
 248         case VME_AM_A24:
 249                 ctl = 0x00010000;
 250                 break;
 251         case VME_AM_A32:
 252                 ctl = 0x00020000;
 253                 break;
 254         }
 255
 256         switch (vam & VME_AM_Mxx) {
 257         case VME_AM_DATA:
 258                 ctl |= 0x00000000;
 259                 break;
 260         case VME_AM_PROG:
 261                 ctl |= 0x00800000;
 262                 break;
 263         }
 264
 265         if (vam & VME_AM_SUP) {
 266                 ctl |= 0x00100000;
 267
 268         }
 269
 270         switch (pms & PCI_MS_Mxx) {
 271         case PCI_MS_MEM:
 272                 ctl |= 0x00000000;
 273                 break;
 274         case PCI_MS_IO:
 275                 ctl |= 0x00000001;
 276                 break;
 277         case PCI_MS_CONFIG:
 278                 ctl |= 0x00000002;
 279                 break;
 280         }
 281
 282         ctl |= 0x80f00000;    /* enable */
 283
 284         writel(ctl, &dev->uregs->vsi[i].ctl);
 285
 286         debug ("universe: window-addr=%p\n", &dev->uregs->vsi[i].ctl);
 287         debug ("universe: vme slave window[%d] ctl=%08x\n", i, readl(&dev->uregs->vsi[i].ctl));
 288         debug ("universe: vme slave window[%d] bs=%08x\n", i, readl(&dev->uregs->vsi[i].bs));
 289         debug ("universe: vme slave window[%d] bd=%08x\n", i, readl(&dev->uregs->vsi[i].bd));
 290         debug ("universe: vme slave window[%d] to=%08x\n", i, readl(&dev->uregs->vsi[i].to));
 291
 292         return 0;
 293
 294  exit_10:
 295         return -result;
 296 }
 297
 298
 299 /*
 300  * Tundra Universe configuration
 301  */
 302 int do_universe(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 303 {
 304         ulong addr1 = 0, addr2 = 0, size = 0, vam = 0, pms = 0, vdw = 0;
 305         char cmd = 'x';
 306
 307         /* get parameter */
 308         if (argc > 1)
 309                 cmd = argv[1][0];
 310         if (argc > 2)
 311                 addr1 = simple_strtoul(argv[2], NULL, 16);
 312         if (argc > 3)
 313                 addr2 = simple_strtoul(argv[3], NULL, 16);
 314         if (argc > 4)
 315                 size = simple_strtoul(argv[4], NULL, 16);
 316         if (argc > 5)
 317                 vam = simple_strtoul(argv[5], NULL, 16);
 318         if (argc > 6)
 319                 pms = simple_strtoul(argv[6], NULL, 16);
 320         if (argc > 7)
 321                 vdw = simple_strtoul(argv[7], NULL, 16);
 322
 323         switch (cmd) {
 324         case 'i':               /* init */
 325                 universe_init();
 326                 break;
 327         case 'v':               /* vme */
 328                 printf("Configuring Universe VME Slave Window (VME->PCI):\n");
 329                 printf("  vme=%08lx pci=%08lx size=%08lx vam=%02lx pms=%02lx\n",
 330                        addr1, addr2, size, vam, pms);
 331                 universe_vme_slave_window(addr1, addr2, size, vam, pms);
 332                 break;
 333         case 'p':               /* pci */
 334                 printf("Configuring Universe PCI Slave Window (PCI->VME):\n");
 335                 printf("  pci=%08lx vme=%08lx size=%08lx vam=%02lx pms=%02lx vdw=%02lx\n",
 336                        addr1, addr2, size, vam, pms, vdw);
 337                 universe_pci_slave_window(addr1, addr2, size, vam, pms, vdw);
 338                 break;
 339         default:
 340                 printf("Universe command %s not supported!\n", argv[1]);
 341         }
 342
 343         return 0;
 344 }
 345
 346
 347 U_BOOT_CMD(
 348         universe,       8,      1,      do_universe,
 349         "initialize and configure Turndra Universe",
 350         "init\n"
 351         "    - initialize universe\n"
 352         "universe vme [vme_addr] [pci_addr] [size] [vam] [pms]\n"
 353         "    - create vme slave window (access: vme->pci)\n"
 354         "universe pci [pci_addr] [vme_addr] [size] [vam] [pms] [vdw]\n"
 355         "    - create pci slave window (access: pci->vme)\n"
 356         "    [vam] = VMEbus Address-Modifier:  01 -> A16 Address Space\n"
 357         "                                      02 -> A24 Address Space\n"
 358         "                                      03 -> A32 Address Space\n"
 359         "                                      04 -> Supervisor AM Code\n"
 360         "                                      10 -> Data AM Code\n"
 361         "                                      20 -> Program AM Code\n"
 362         "    [pms] = PCI Memory Space:         01 -> Memory Space\n"
 363         "                                      02 -> I/O Space\n"
 364         "                                      03 -> Configuration Space\n"
 365         "    [vdw] = VMEbus Maximum Datawidth: 01 -> D8 Data Width\n"
 366         "                                      02 -> D16 Data Width\n"
 367         "                                      03 -> D32 Data Width"
 368 );