hw/misc/bcm2835_property.c

   1 /*
   2  * Raspberry Pi emulation (c) 2012 Gregory Estrade
   3  * This code is licensed under the GNU GPLv2 and later.
   4  */
   5
   6 #include "qemu/osdep.h"
   7 #include "qapi/error.h"
   8 #include "hw/misc/bcm2835_property.h"
   9 #include "hw/misc/bcm2835_mbox_defs.h"
  10 #include "sysemu/dma.h"
  11 #include "qemu/log.h"
  12
  13 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
  14
  15 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
  16 {
  17     uint32_t tag;
  18     uint32_t bufsize;
  19     uint32_t tot_len;
  20     size_t resplen;
  21     uint32_t tmp;
  22     int n;
  23     uint32_t offset, length, color;
  24
  25     /*
  26      * Copy the current state of the framebuffer config; we will update
  27      * this copy as we process tags and then ask the framebuffer to use
  28      * it at the end.
  29      */
  30     BCM2835FBConfig fbconfig = s->fbdev->config;
  31     bool fbconfig_updated = false;
  32
  33     value &= ~0xf;
  34
  35     s->addr = value;
  36
  37     tot_len = ldl_le_phys(&s->dma_as, value);
  38
  39     /* @(addr + 4) : Buffer response code */
  40     value = s->addr + 8;
  41     while (value + 8 <= s->addr + tot_len) {
  42         tag = ldl_le_phys(&s->dma_as, value);
  43         bufsize = ldl_le_phys(&s->dma_as, value + 4);
  44         /* @(value + 8) : Request/response indicator */
  45         resplen = 0;
  46         switch (tag) {
  47         case 0x00000000: /* End tag */
  48             break;
  49         case 0x00000001: /* Get firmware revision */
  50             stl_le_phys(&s->dma_as, value + 12, 346337);
  51             resplen = 4;
  52             break;
  53         case 0x00010001: /* Get board model */
  54             qemu_log_mask(LOG_UNIMP,
  55                           "bcm2835_property: %x get board model NYI\n", tag);
  56             resplen = 4;
  57             break;
  58         case 0x00010002: /* Get board revision */
  59             stl_le_phys(&s->dma_as, value + 12, s->board_rev);
  60             resplen = 4;
  61             break;
  62         case 0x00010003: /* Get board MAC address */
  63             resplen = sizeof(s->macaddr.a);
  64             dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
  65             break;
  66         case 0x00010004: /* Get board serial */
  67             qemu_log_mask(LOG_UNIMP,
  68                           "bcm2835_property: %x get board serial NYI\n", tag);
  69             resplen = 8;
  70             break;
  71         case 0x00010005: /* Get ARM memory */
  72             /* base */
  73             stl_le_phys(&s->dma_as, value + 12, 0);
  74             /* size */
  75             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
  76             resplen = 8;
  77             break;
  78         case 0x00010006: /* Get VC memory */
  79             /* base */
  80             stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  81             /* size */
  82             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
  83             resplen = 8;
  84             break;
  85         case 0x00028001: /* Set power state */
  86             /* Assume that whatever device they asked for exists,
  87              * and we'll just claim we set it to the desired state
  88              */
  89             tmp = ldl_le_phys(&s->dma_as, value + 16);
  90             stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
  91             resplen = 8;
  92             break;
  93
  94         /* Clocks */
  95
  96         case 0x00030001: /* Get clock state */
  97             stl_le_phys(&s->dma_as, value + 16, 0x1);
  98             resplen = 8;
  99             break;
 100
 101         case 0x00038001: /* Set clock state */
 102             qemu_log_mask(LOG_UNIMP,
 103                           "bcm2835_property: %x set clock state NYI\n", tag);
 104             resplen = 8;
 105             break;
 106
 107         case 0x00030002: /* Get clock rate */
 108         case 0x00030004: /* Get max clock rate */
 109         case 0x00030007: /* Get min clock rate */
 110             switch (ldl_le_phys(&s->dma_as, value + 12)) {
 111             case 1: /* EMMC */
 112                 stl_le_phys(&s->dma_as, value + 16, 50000000);
 113                 break;
 114             case 2: /* UART */
 115                 stl_le_phys(&s->dma_as, value + 16, 3000000);
 116                 break;
 117             default:
 118                 stl_le_phys(&s->dma_as, value + 16, 700000000);
 119                 break;
 120             }
 121             resplen = 8;
 122             break;
 123
 124         case 0x00038002: /* Set clock rate */
 125         case 0x00038004: /* Set max clock rate */
 126         case 0x00038007: /* Set min clock rate */
 127             qemu_log_mask(LOG_UNIMP,
 128                           "bcm2835_property: %x set clock rates NYI\n", tag);
 129             resplen = 8;
 130             break;
 131
 132         /* Temperature */
 133
 134         case 0x00030006: /* Get temperature */
 135             stl_le_phys(&s->dma_as, value + 16, 25000);
 136             resplen = 8;
 137             break;
 138
 139         case 0x0003000A: /* Get max temperature */
 140             stl_le_phys(&s->dma_as, value + 16, 99000);
 141             resplen = 8;
 142             break;
 143
 144         /* Frame buffer */
 145
 146         case 0x00040001: /* Allocate buffer */
 147             stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
 148             stl_le_phys(&s->dma_as, value + 16,
 149                         bcm2835_fb_get_size(&fbconfig));
 150             resplen = 8;
 151             break;
 152         case 0x00048001: /* Release buffer */
 153             resplen = 0;
 154             break;
 155         case 0x00040002: /* Blank screen */
 156             resplen = 4;
 157             break;
 158         case 0x00044003: /* Test physical display width/height */
 159         case 0x00044004: /* Test virtual display width/height */
 160             resplen = 8;
 161             break;
 162         case 0x00048003: /* Set physical display width/height */
 163             fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
 164             fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
 165             bcm2835_fb_validate_config(&fbconfig);
 166             fbconfig_updated = true;
 167             /* fall through */
 168         case 0x00040003: /* Get physical display width/height */
 169             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
 170             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
 171             resplen = 8;
 172             break;
 173         case 0x00048004: /* Set virtual display width/height */
 174             fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
 175             fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
 176             bcm2835_fb_validate_config(&fbconfig);
 177             fbconfig_updated = true;
 178             /* fall through */
 179         case 0x00040004: /* Get virtual display width/height */
 180             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
 181             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
 182             resplen = 8;
 183             break;
 184         case 0x00044005: /* Test depth */
 185             resplen = 4;
 186             break;
 187         case 0x00048005: /* Set depth */
 188             fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
 189             bcm2835_fb_validate_config(&fbconfig);
 190             fbconfig_updated = true;
 191             /* fall through */
 192         case 0x00040005: /* Get depth */
 193             stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
 194             resplen = 4;
 195             break;
 196         case 0x00044006: /* Test pixel order */
 197             resplen = 4;
 198             break;
 199         case 0x00048006: /* Set pixel order */
 200             fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
 201             bcm2835_fb_validate_config(&fbconfig);
 202             fbconfig_updated = true;
 203             /* fall through */
 204         case 0x00040006: /* Get pixel order */
 205             stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
 206             resplen = 4;
 207             break;
 208         case 0x00044007: /* Test pixel alpha */
 209             resplen = 4;
 210             break;
 211         case 0x00048007: /* Set alpha */
 212             fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
 213             bcm2835_fb_validate_config(&fbconfig);
 214             fbconfig_updated = true;
 215             /* fall through */
 216         case 0x00040007: /* Get alpha */
 217             stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
 218             resplen = 4;
 219             break;
 220         case 0x00040008: /* Get pitch */
 221             stl_le_phys(&s->dma_as, value + 12,
 222                         bcm2835_fb_get_pitch(&fbconfig));
 223             resplen = 4;
 224             break;
 225         case 0x00044009: /* Test virtual offset */
 226             resplen = 8;
 227             break;
 228         case 0x00048009: /* Set virtual offset */
 229             fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
 230             fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
 231             bcm2835_fb_validate_config(&fbconfig);
 232             fbconfig_updated = true;
 233             /* fall through */
 234         case 0x00040009: /* Get virtual offset */
 235             stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
 236             stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
 237             resplen = 8;
 238             break;
 239         case 0x0004000a: /* Get/Test/Set overscan */
 240         case 0x0004400a:
 241         case 0x0004800a:
 242             stl_le_phys(&s->dma_as, value + 12, 0);
 243             stl_le_phys(&s->dma_as, value + 16, 0);
 244             stl_le_phys(&s->dma_as, value + 20, 0);
 245             stl_le_phys(&s->dma_as, value + 24, 0);
 246             resplen = 16;
 247             break;
 248         case 0x0004800b: /* Set palette */
 249             offset = ldl_le_phys(&s->dma_as, value + 12);
 250             length = ldl_le_phys(&s->dma_as, value + 16);
 251             n = 0;
 252             while (n < length - offset) {
 253                 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
 254                 stl_le_phys(&s->dma_as,
 255                             s->fbdev->vcram_base + ((offset + n) << 2), color);
 256                 n++;
 257             }
 258             stl_le_phys(&s->dma_as, value + 12, 0);
 259             resplen = 4;
 260             break;
 261
 262         case 0x00060001: /* Get DMA channels */
 263             /* channels 2-5 */
 264             stl_le_phys(&s->dma_as, value + 12, 0x003C);
 265             resplen = 4;
 266             break;
 267
 268         case 0x00050001: /* Get command line */
 269             resplen = 0;
 270             break;
 271
 272         default:
 273             qemu_log_mask(LOG_GUEST_ERROR,
 274                           "bcm2835_property: unhandled tag %08x\n", tag);
 275             break;
 276         }
 277
 278         if (tag == 0) {
 279             break;
 280         }
 281
 282         stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 283         value += bufsize + 12;
 284     }
 285
 286     /* Reconfigure framebuffer if required */
 287     if (fbconfig_updated) {
 288         bcm2835_fb_reconfigure(s->fbdev, &fbconfig);
 289     }
 290
 291     /* Buffer response code */
 292     stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
 293 }
 294
 295 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 296                                       unsigned size)
 297 {
 298     BCM2835PropertyState *s = opaque;
 299     uint32_t res = 0;
 300
 301     switch (offset) {
 302     case MBOX_AS_DATA:
 303         res = MBOX_CHAN_PROPERTY | s->addr;
 304         s->pending = false;
 305         qemu_set_irq(s->mbox_irq, 0);
 306         break;
 307
 308     case MBOX_AS_PENDING:
 309         res = s->pending;
 310         break;
 311
 312     default:
 313         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 314                       __func__, offset);
 315         return 0;
 316     }
 317
 318     return res;
 319 }
 320
 321 static void bcm2835_property_write(void *opaque, hwaddr offset,
 322                                    uint64_t value, unsigned size)
 323 {
 324     BCM2835PropertyState *s = opaque;
 325
 326     switch (offset) {
 327     case MBOX_AS_DATA:
 328         /* bcm2835_mbox should check our pending status before pushing */
 329         assert(!s->pending);
 330         s->pending = true;
 331         bcm2835_property_mbox_push(s, value);
 332         qemu_set_irq(s->mbox_irq, 1);
 333         break;
 334
 335     default:
 336         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 337                       __func__, offset);
 338         return;
 339     }
 340 }
 341
 342 static const MemoryRegionOps bcm2835_property_ops = {
 343     .read = bcm2835_property_read,
 344     .write = bcm2835_property_write,
 345     .endianness = DEVICE_NATIVE_ENDIAN,
 346     .valid.min_access_size = 4,
 347     .valid.max_access_size = 4,
 348 };
 349
 350 static const VMStateDescription vmstate_bcm2835_property = {
 351     .name = TYPE_BCM2835_PROPERTY,
 352     .version_id = 1,
 353     .minimum_version_id = 1,
 354     .fields      = (VMStateField[]) {
 355         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 356         VMSTATE_UINT32(addr, BCM2835PropertyState),
 357         VMSTATE_BOOL(pending, BCM2835PropertyState),
 358         VMSTATE_END_OF_LIST()
 359     }
 360 };
 361
 362 static void bcm2835_property_init(Object *obj)
 363 {
 364     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 365
 366     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 367                           TYPE_BCM2835_PROPERTY, 0x10);
 368     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 369     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 370 }
 371
 372 static void bcm2835_property_reset(DeviceState *dev)
 373 {
 374     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 375
 376     s->pending = false;
 377 }
 378
 379 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 380 {
 381     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 382     Object *obj;
 383     Error *err = NULL;
 384
 385     obj = object_property_get_link(OBJECT(dev), "fb", &err);
 386     if (obj == NULL) {
 387         error_setg(errp, "%s: required fb link not found: %s",
 388                    __func__, error_get_pretty(err));
 389         return;
 390     }
 391
 392     s->fbdev = BCM2835_FB(obj);
 393
 394     obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
 395     if (obj == NULL) {
 396         error_setg(errp, "%s: required dma-mr link not found: %s",
 397                    __func__, error_get_pretty(err));
 398         return;
 399     }
 400
 401     s->dma_mr = MEMORY_REGION(obj);
 402     address_space_init(&s->dma_as, s->dma_mr, NULL);
 403
 404     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 405     qemu_macaddr_default_if_unset(&s->macaddr);
 406
 407     bcm2835_property_reset(dev);
 408 }
 409
 410 static Property bcm2835_property_props[] = {
 411     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 412     DEFINE_PROP_END_OF_LIST()
 413 };
 414
 415 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 416 {
 417     DeviceClass *dc = DEVICE_CLASS(klass);
 418
 419     dc->props = bcm2835_property_props;
 420     dc->realize = bcm2835_property_realize;
 421     dc->vmsd = &vmstate_bcm2835_property;
 422 }
 423
 424 static TypeInfo bcm2835_property_info = {
 425     .name          = TYPE_BCM2835_PROPERTY,
 426     .parent        = TYPE_SYS_BUS_DEVICE,
 427     .instance_size = sizeof(BCM2835PropertyState),
 428     .class_init    = bcm2835_property_class_init,
 429     .instance_init = bcm2835_property_init,
 430 };
 431
 432 static void bcm2835_property_register_types(void)
 433 {
 434     type_register_static(&bcm2835_property_info);
 435 }
 436
 437 type_init(bcm2835_property_register_types)