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
  12 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
  13
  14 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
  15 {
  16     uint32_t tag;
  17     uint32_t bufsize;
  18     uint32_t tot_len;
  19     size_t resplen;
  20     uint32_t tmp;
  21     int n;
  22     uint32_t offset, length, color;
  23     uint32_t xres, yres, xoffset, yoffset, bpp, pixo, alpha;
  24     uint32_t tmp_xres, tmp_yres, tmp_xoffset, tmp_yoffset;
  25     uint32_t tmp_bpp, tmp_pixo, tmp_alpha;
  26     uint32_t *newxres = NULL, *newyres = NULL, *newxoffset = NULL,
  27         *newyoffset = NULL, *newbpp = NULL, *newpixo = NULL, *newalpha = NULL;
  28
  29     value &= ~0xf;
  30
  31     s->addr = value;
  32
  33     tot_len = ldl_le_phys(&s->dma_as, value);
  34
  35     /* @(addr + 4) : Buffer response code */
  36     value = s->addr + 8;
  37     while (value + 8 <= s->addr + tot_len) {
  38         tag = ldl_le_phys(&s->dma_as, value);
  39         bufsize = ldl_le_phys(&s->dma_as, value + 4);
  40         /* @(value + 8) : Request/response indicator */
  41         resplen = 0;
  42         switch (tag) {
  43         case 0x00000000: /* End tag */
  44             break;
  45         case 0x00000001: /* Get firmware revision */
  46             stl_le_phys(&s->dma_as, value + 12, 346337);
  47             resplen = 4;
  48             break;
  49         case 0x00010001: /* Get board model */
  50             qemu_log_mask(LOG_UNIMP,
  51                           "bcm2835_property: %x get board model NYI\n", tag);
  52             resplen = 4;
  53             break;
  54         case 0x00010002: /* Get board revision */
  55             stl_le_phys(&s->dma_as, value + 12, s->board_rev);
  56             resplen = 4;
  57             break;
  58         case 0x00010003: /* Get board MAC address */
  59             resplen = sizeof(s->macaddr.a);
  60             dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
  61             break;
  62         case 0x00010004: /* Get board serial */
  63             qemu_log_mask(LOG_UNIMP,
  64                           "bcm2835_property: %x get board serial NYI\n", tag);
  65             resplen = 8;
  66             break;
  67         case 0x00010005: /* Get ARM memory */
  68             /* base */
  69             stl_le_phys(&s->dma_as, value + 12, 0);
  70             /* size */
  71             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
  72             resplen = 8;
  73             break;
  74         case 0x00010006: /* Get VC memory */
  75             /* base */
  76             stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  77             /* size */
  78             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
  79             resplen = 8;
  80             break;
  81         case 0x00028001: /* Set power state */
  82             /* Assume that whatever device they asked for exists,
  83              * and we'll just claim we set it to the desired state
  84              */
  85             tmp = ldl_le_phys(&s->dma_as, value + 16);
  86             stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
  87             resplen = 8;
  88             break;
  89
  90         /* Clocks */
  91
  92         case 0x00030001: /* Get clock state */
  93             stl_le_phys(&s->dma_as, value + 16, 0x1);
  94             resplen = 8;
  95             break;
  96
  97         case 0x00038001: /* Set clock state */
  98             qemu_log_mask(LOG_UNIMP,
  99                           "bcm2835_property: %x set clock state NYI\n", tag);
 100             resplen = 8;
 101             break;
 102
 103         case 0x00030002: /* Get clock rate */
 104         case 0x00030004: /* Get max clock rate */
 105         case 0x00030007: /* Get min clock rate */
 106             switch (ldl_le_phys(&s->dma_as, value + 12)) {
 107             case 1: /* EMMC */
 108                 stl_le_phys(&s->dma_as, value + 16, 50000000);
 109                 break;
 110             case 2: /* UART */
 111                 stl_le_phys(&s->dma_as, value + 16, 3000000);
 112                 break;
 113             default:
 114                 stl_le_phys(&s->dma_as, value + 16, 700000000);
 115                 break;
 116             }
 117             resplen = 8;
 118             break;
 119
 120         case 0x00038002: /* Set clock rate */
 121         case 0x00038004: /* Set max clock rate */
 122         case 0x00038007: /* Set min clock rate */
 123             qemu_log_mask(LOG_UNIMP,
 124                           "bcm2835_property: %x set clock rates NYI\n", tag);
 125             resplen = 8;
 126             break;
 127
 128         /* Temperature */
 129
 130         case 0x00030006: /* Get temperature */
 131             stl_le_phys(&s->dma_as, value + 16, 25000);
 132             resplen = 8;
 133             break;
 134
 135         case 0x0003000A: /* Get max temperature */
 136             stl_le_phys(&s->dma_as, value + 16, 99000);
 137             resplen = 8;
 138             break;
 139
 140         /* Frame buffer */
 141
 142         case 0x00040001: /* Allocate buffer */
 143             stl_le_phys(&s->dma_as, value + 12, s->fbdev->base);
 144             tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
 145             tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
 146             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
 147             stl_le_phys(&s->dma_as, value + 16,
 148                         tmp_xres * tmp_yres * tmp_bpp / 8);
 149             resplen = 8;
 150             break;
 151         case 0x00048001: /* Release buffer */
 152             resplen = 0;
 153             break;
 154         case 0x00040002: /* Blank screen */
 155             resplen = 4;
 156             break;
 157         case 0x00040003: /* Get display width/height */
 158         case 0x00040004:
 159             tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
 160             tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
 161             stl_le_phys(&s->dma_as, value + 12, tmp_xres);
 162             stl_le_phys(&s->dma_as, value + 16, tmp_yres);
 163             resplen = 8;
 164             break;
 165         case 0x00044003: /* Test display width/height */
 166         case 0x00044004:
 167             resplen = 8;
 168             break;
 169         case 0x00048003: /* Set display width/height */
 170         case 0x00048004:
 171             xres = ldl_le_phys(&s->dma_as, value + 12);
 172             newxres = &xres;
 173             yres = ldl_le_phys(&s->dma_as, value + 16);
 174             newyres = &yres;
 175             resplen = 8;
 176             break;
 177         case 0x00040005: /* Get depth */
 178             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
 179             stl_le_phys(&s->dma_as, value + 12, tmp_bpp);
 180             resplen = 4;
 181             break;
 182         case 0x00044005: /* Test depth */
 183             resplen = 4;
 184             break;
 185         case 0x00048005: /* Set depth */
 186             bpp = ldl_le_phys(&s->dma_as, value + 12);
 187             newbpp = &bpp;
 188             resplen = 4;
 189             break;
 190         case 0x00040006: /* Get pixel order */
 191             tmp_pixo = newpixo != NULL ? *newpixo : s->fbdev->pixo;
 192             stl_le_phys(&s->dma_as, value + 12, tmp_pixo);
 193             resplen = 4;
 194             break;
 195         case 0x00044006: /* Test pixel order */
 196             resplen = 4;
 197             break;
 198         case 0x00048006: /* Set pixel order */
 199             pixo = ldl_le_phys(&s->dma_as, value + 12);
 200             newpixo = &pixo;
 201             resplen = 4;
 202             break;
 203         case 0x00040007: /* Get alpha */
 204             tmp_alpha = newalpha != NULL ? *newalpha : s->fbdev->alpha;
 205             stl_le_phys(&s->dma_as, value + 12, tmp_alpha);
 206             resplen = 4;
 207             break;
 208         case 0x00044007: /* Test pixel alpha */
 209             resplen = 4;
 210             break;
 211         case 0x00048007: /* Set alpha */
 212             alpha = ldl_le_phys(&s->dma_as, value + 12);
 213             newalpha = &alpha;
 214             resplen = 4;
 215             break;
 216         case 0x00040008: /* Get pitch */
 217             tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
 218             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
 219             stl_le_phys(&s->dma_as, value + 12, tmp_xres * tmp_bpp / 8);
 220             resplen = 4;
 221             break;
 222         case 0x00040009: /* Get virtual offset */
 223             tmp_xoffset = newxoffset != NULL ? *newxoffset : s->fbdev->xoffset;
 224             tmp_yoffset = newyoffset != NULL ? *newyoffset : s->fbdev->yoffset;
 225             stl_le_phys(&s->dma_as, value + 12, tmp_xoffset);
 226             stl_le_phys(&s->dma_as, value + 16, tmp_yoffset);
 227             resplen = 8;
 228             break;
 229         case 0x00044009: /* Test virtual offset */
 230             resplen = 8;
 231             break;
 232         case 0x00048009: /* Set virtual offset */
 233             xoffset = ldl_le_phys(&s->dma_as, value + 12);
 234             newxoffset = &xoffset;
 235             yoffset = ldl_le_phys(&s->dma_as, value + 16);
 236             newyoffset = &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 (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
 288         || newalpha) {
 289         bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
 290                                newyoffset, newbpp, newpixo, newalpha);
 291     }
 292
 293     /* Buffer response code */
 294     stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
 295 }
 296
 297 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 298                                       unsigned size)
 299 {
 300     BCM2835PropertyState *s = opaque;
 301     uint32_t res = 0;
 302
 303     switch (offset) {
 304     case MBOX_AS_DATA:
 305         res = MBOX_CHAN_PROPERTY | s->addr;
 306         s->pending = false;
 307         qemu_set_irq(s->mbox_irq, 0);
 308         break;
 309
 310     case MBOX_AS_PENDING:
 311         res = s->pending;
 312         break;
 313
 314     default:
 315         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 316                       __func__, offset);
 317         return 0;
 318     }
 319
 320     return res;
 321 }
 322
 323 static void bcm2835_property_write(void *opaque, hwaddr offset,
 324                                    uint64_t value, unsigned size)
 325 {
 326     BCM2835PropertyState *s = opaque;
 327
 328     switch (offset) {
 329     case MBOX_AS_DATA:
 330         /* bcm2835_mbox should check our pending status before pushing */
 331         assert(!s->pending);
 332         s->pending = true;
 333         bcm2835_property_mbox_push(s, value);
 334         qemu_set_irq(s->mbox_irq, 1);
 335         break;
 336
 337     default:
 338         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 339                       __func__, offset);
 340         return;
 341     }
 342 }
 343
 344 static const MemoryRegionOps bcm2835_property_ops = {
 345     .read = bcm2835_property_read,
 346     .write = bcm2835_property_write,
 347     .endianness = DEVICE_NATIVE_ENDIAN,
 348     .valid.min_access_size = 4,
 349     .valid.max_access_size = 4,
 350 };
 351
 352 static const VMStateDescription vmstate_bcm2835_property = {
 353     .name = TYPE_BCM2835_PROPERTY,
 354     .version_id = 1,
 355     .minimum_version_id = 1,
 356     .fields      = (VMStateField[]) {
 357         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 358         VMSTATE_UINT32(addr, BCM2835PropertyState),
 359         VMSTATE_BOOL(pending, BCM2835PropertyState),
 360         VMSTATE_END_OF_LIST()
 361     }
 362 };
 363
 364 static void bcm2835_property_init(Object *obj)
 365 {
 366     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 367
 368     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 369                           TYPE_BCM2835_PROPERTY, 0x10);
 370     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 371     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 372 }
 373
 374 static void bcm2835_property_reset(DeviceState *dev)
 375 {
 376     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 377
 378     s->pending = false;
 379 }
 380
 381 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 382 {
 383     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 384     Object *obj;
 385     Error *err = NULL;
 386
 387     obj = object_property_get_link(OBJECT(dev), "fb", &err);
 388     if (obj == NULL) {
 389         error_setg(errp, "%s: required fb link not found: %s",
 390                    __func__, error_get_pretty(err));
 391         return;
 392     }
 393
 394     s->fbdev = BCM2835_FB(obj);
 395
 396     obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
 397     if (obj == NULL) {
 398         error_setg(errp, "%s: required dma-mr link not found: %s",
 399                    __func__, error_get_pretty(err));
 400         return;
 401     }
 402
 403     s->dma_mr = MEMORY_REGION(obj);
 404     address_space_init(&s->dma_as, s->dma_mr, NULL);
 405
 406     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 407     qemu_macaddr_default_if_unset(&s->macaddr);
 408
 409     bcm2835_property_reset(dev);
 410 }
 411
 412 static Property bcm2835_property_props[] = {
 413     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 414     DEFINE_PROP_END_OF_LIST()
 415 };
 416
 417 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 418 {
 419     DeviceClass *dc = DEVICE_CLASS(klass);
 420
 421     dc->props = bcm2835_property_props;
 422     dc->realize = bcm2835_property_realize;
 423     dc->vmsd = &vmstate_bcm2835_property;
 424 }
 425
 426 static TypeInfo bcm2835_property_info = {
 427     .name          = TYPE_BCM2835_PROPERTY,
 428     .parent        = TYPE_SYS_BUS_DEVICE,
 429     .instance_size = sizeof(BCM2835PropertyState),
 430     .class_init    = bcm2835_property_class_init,
 431     .instance_init = bcm2835_property_init,
 432 };
 433
 434 static void bcm2835_property_register_types(void)
 435 {
 436     type_register_static(&bcm2835_property_info);
 437 }
 438
 439 type_init(bcm2835_property_register_types)