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     uint32_t xres, yres, xoffset, yoffset, bpp, pixo, alpha;
  25     uint32_t tmp_xres, tmp_yres, tmp_xoffset, tmp_yoffset;
  26     uint32_t tmp_bpp, tmp_pixo, tmp_alpha;
  27     uint32_t *newxres = NULL, *newyres = NULL, *newxoffset = NULL,
  28         *newyoffset = NULL, *newbpp = NULL, *newpixo = NULL, *newalpha = NULL;
  29
  30     value &= ~0xf;
  31
  32     s->addr = value;
  33
  34     tot_len = ldl_le_phys(&s->dma_as, value);
  35
  36     /* @(addr + 4) : Buffer response code */
  37     value = s->addr + 8;
  38     while (value + 8 <= s->addr + tot_len) {
  39         tag = ldl_le_phys(&s->dma_as, value);
  40         bufsize = ldl_le_phys(&s->dma_as, value + 4);
  41         /* @(value + 8) : Request/response indicator */
  42         resplen = 0;
  43         switch (tag) {
  44         case 0x00000000: /* End tag */
  45             break;
  46         case 0x00000001: /* Get firmware revision */
  47             stl_le_phys(&s->dma_as, value + 12, 346337);
  48             resplen = 4;
  49             break;
  50         case 0x00010001: /* Get board model */
  51             qemu_log_mask(LOG_UNIMP,
  52                           "bcm2835_property: %x get board model NYI\n", tag);
  53             resplen = 4;
  54             break;
  55         case 0x00010002: /* Get board revision */
  56             stl_le_phys(&s->dma_as, value + 12, s->board_rev);
  57             resplen = 4;
  58             break;
  59         case 0x00010003: /* Get board MAC address */
  60             resplen = sizeof(s->macaddr.a);
  61             dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
  62             break;
  63         case 0x00010004: /* Get board serial */
  64             qemu_log_mask(LOG_UNIMP,
  65                           "bcm2835_property: %x get board serial NYI\n", tag);
  66             resplen = 8;
  67             break;
  68         case 0x00010005: /* Get ARM memory */
  69             /* base */
  70             stl_le_phys(&s->dma_as, value + 12, 0);
  71             /* size */
  72             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
  73             resplen = 8;
  74             break;
  75         case 0x00010006: /* Get VC memory */
  76             /* base */
  77             stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  78             /* size */
  79             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
  80             resplen = 8;
  81             break;
  82         case 0x00028001: /* Set power state */
  83             /* Assume that whatever device they asked for exists,
  84              * and we'll just claim we set it to the desired state
  85              */
  86             tmp = ldl_le_phys(&s->dma_as, value + 16);
  87             stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
  88             resplen = 8;
  89             break;
  90
  91         /* Clocks */
  92
  93         case 0x00030001: /* Get clock state */
  94             stl_le_phys(&s->dma_as, value + 16, 0x1);
  95             resplen = 8;
  96             break;
  97
  98         case 0x00038001: /* Set clock state */
  99             qemu_log_mask(LOG_UNIMP,
 100                           "bcm2835_property: %x set clock state NYI\n", tag);
 101             resplen = 8;
 102             break;
 103
 104         case 0x00030002: /* Get clock rate */
 105         case 0x00030004: /* Get max clock rate */
 106         case 0x00030007: /* Get min clock rate */
 107             switch (ldl_le_phys(&s->dma_as, value + 12)) {
 108             case 1: /* EMMC */
 109                 stl_le_phys(&s->dma_as, value + 16, 50000000);
 110                 break;
 111             case 2: /* UART */
 112                 stl_le_phys(&s->dma_as, value + 16, 3000000);
 113                 break;
 114             default:
 115                 stl_le_phys(&s->dma_as, value + 16, 700000000);
 116                 break;
 117             }
 118             resplen = 8;
 119             break;
 120
 121         case 0x00038002: /* Set clock rate */
 122         case 0x00038004: /* Set max clock rate */
 123         case 0x00038007: /* Set min clock rate */
 124             qemu_log_mask(LOG_UNIMP,
 125                           "bcm2835_property: %x set clock rates NYI\n", tag);
 126             resplen = 8;
 127             break;
 128
 129         /* Temperature */
 130
 131         case 0x00030006: /* Get temperature */
 132             stl_le_phys(&s->dma_as, value + 16, 25000);
 133             resplen = 8;
 134             break;
 135
 136         case 0x0003000A: /* Get max temperature */
 137             stl_le_phys(&s->dma_as, value + 16, 99000);
 138             resplen = 8;
 139             break;
 140
 141         /* Frame buffer */
 142
 143         case 0x00040001: /* Allocate buffer */
 144             stl_le_phys(&s->dma_as, value + 12, s->fbdev->base);
 145             tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
 146             tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
 147             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
 148             stl_le_phys(&s->dma_as, value + 16,
 149                         tmp_xres * tmp_yres * tmp_bpp / 8);
 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 0x00040003: /* Get display width/height */
 159         case 0x00040004:
 160             tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
 161             tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
 162             stl_le_phys(&s->dma_as, value + 12, tmp_xres);
 163             stl_le_phys(&s->dma_as, value + 16, tmp_yres);
 164             resplen = 8;
 165             break;
 166         case 0x00044003: /* Test display width/height */
 167         case 0x00044004:
 168             resplen = 8;
 169             break;
 170         case 0x00048003: /* Set display width/height */
 171         case 0x00048004:
 172             xres = ldl_le_phys(&s->dma_as, value + 12);
 173             newxres = &xres;
 174             yres = ldl_le_phys(&s->dma_as, value + 16);
 175             newyres = &yres;
 176             resplen = 8;
 177             break;
 178         case 0x00040005: /* Get depth */
 179             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
 180             stl_le_phys(&s->dma_as, value + 12, tmp_bpp);
 181             resplen = 4;
 182             break;
 183         case 0x00044005: /* Test depth */
 184             resplen = 4;
 185             break;
 186         case 0x00048005: /* Set depth */
 187             bpp = ldl_le_phys(&s->dma_as, value + 12);
 188             newbpp = &bpp;
 189             resplen = 4;
 190             break;
 191         case 0x00040006: /* Get pixel order */
 192             tmp_pixo = newpixo != NULL ? *newpixo : s->fbdev->pixo;
 193             stl_le_phys(&s->dma_as, value + 12, tmp_pixo);
 194             resplen = 4;
 195             break;
 196         case 0x00044006: /* Test pixel order */
 197             resplen = 4;
 198             break;
 199         case 0x00048006: /* Set pixel order */
 200             pixo = ldl_le_phys(&s->dma_as, value + 12);
 201             newpixo = &pixo;
 202             resplen = 4;
 203             break;
 204         case 0x00040007: /* Get alpha */
 205             tmp_alpha = newalpha != NULL ? *newalpha : s->fbdev->alpha;
 206             stl_le_phys(&s->dma_as, value + 12, tmp_alpha);
 207             resplen = 4;
 208             break;
 209         case 0x00044007: /* Test pixel alpha */
 210             resplen = 4;
 211             break;
 212         case 0x00048007: /* Set alpha */
 213             alpha = ldl_le_phys(&s->dma_as, value + 12);
 214             newalpha = &alpha;
 215             resplen = 4;
 216             break;
 217         case 0x00040008: /* Get pitch */
 218             tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
 219             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
 220             stl_le_phys(&s->dma_as, value + 12, tmp_xres * tmp_bpp / 8);
 221             resplen = 4;
 222             break;
 223         case 0x00040009: /* Get virtual offset */
 224             tmp_xoffset = newxoffset != NULL ? *newxoffset : s->fbdev->xoffset;
 225             tmp_yoffset = newyoffset != NULL ? *newyoffset : s->fbdev->yoffset;
 226             stl_le_phys(&s->dma_as, value + 12, tmp_xoffset);
 227             stl_le_phys(&s->dma_as, value + 16, tmp_yoffset);
 228             resplen = 8;
 229             break;
 230         case 0x00044009: /* Test virtual offset */
 231             resplen = 8;
 232             break;
 233         case 0x00048009: /* Set virtual offset */
 234             xoffset = ldl_le_phys(&s->dma_as, value + 12);
 235             newxoffset = &xoffset;
 236             yoffset = ldl_le_phys(&s->dma_as, value + 16);
 237             newyoffset = &yoffset;
 238             resplen = 8;
 239             break;
 240         case 0x0004000a: /* Get/Test/Set overscan */
 241         case 0x0004400a:
 242         case 0x0004800a:
 243             stl_le_phys(&s->dma_as, value + 12, 0);
 244             stl_le_phys(&s->dma_as, value + 16, 0);
 245             stl_le_phys(&s->dma_as, value + 20, 0);
 246             stl_le_phys(&s->dma_as, value + 24, 0);
 247             resplen = 16;
 248             break;
 249         case 0x0004800b: /* Set palette */
 250             offset = ldl_le_phys(&s->dma_as, value + 12);
 251             length = ldl_le_phys(&s->dma_as, value + 16);
 252             n = 0;
 253             while (n < length - offset) {
 254                 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
 255                 stl_le_phys(&s->dma_as,
 256                             s->fbdev->vcram_base + ((offset + n) << 2), color);
 257                 n++;
 258             }
 259             stl_le_phys(&s->dma_as, value + 12, 0);
 260             resplen = 4;
 261             break;
 262
 263         case 0x00060001: /* Get DMA channels */
 264             /* channels 2-5 */
 265             stl_le_phys(&s->dma_as, value + 12, 0x003C);
 266             resplen = 4;
 267             break;
 268
 269         case 0x00050001: /* Get command line */
 270             resplen = 0;
 271             break;
 272
 273         default:
 274             qemu_log_mask(LOG_GUEST_ERROR,
 275                           "bcm2835_property: unhandled tag %08x\n", tag);
 276             break;
 277         }
 278
 279         if (tag == 0) {
 280             break;
 281         }
 282
 283         stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 284         value += bufsize + 12;
 285     }
 286
 287     /* Reconfigure framebuffer if required */
 288     if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
 289         || newalpha) {
 290         bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
 291                                newyoffset, newbpp, newpixo, newalpha);
 292     }
 293
 294     /* Buffer response code */
 295     stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
 296 }
 297
 298 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 299                                       unsigned size)
 300 {
 301     BCM2835PropertyState *s = opaque;
 302     uint32_t res = 0;
 303
 304     switch (offset) {
 305     case MBOX_AS_DATA:
 306         res = MBOX_CHAN_PROPERTY | s->addr;
 307         s->pending = false;
 308         qemu_set_irq(s->mbox_irq, 0);
 309         break;
 310
 311     case MBOX_AS_PENDING:
 312         res = s->pending;
 313         break;
 314
 315     default:
 316         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 317                       __func__, offset);
 318         return 0;
 319     }
 320
 321     return res;
 322 }
 323
 324 static void bcm2835_property_write(void *opaque, hwaddr offset,
 325                                    uint64_t value, unsigned size)
 326 {
 327     BCM2835PropertyState *s = opaque;
 328
 329     switch (offset) {
 330     case MBOX_AS_DATA:
 331         /* bcm2835_mbox should check our pending status before pushing */
 332         assert(!s->pending);
 333         s->pending = true;
 334         bcm2835_property_mbox_push(s, value);
 335         qemu_set_irq(s->mbox_irq, 1);
 336         break;
 337
 338     default:
 339         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 340                       __func__, offset);
 341         return;
 342     }
 343 }
 344
 345 static const MemoryRegionOps bcm2835_property_ops = {
 346     .read = bcm2835_property_read,
 347     .write = bcm2835_property_write,
 348     .endianness = DEVICE_NATIVE_ENDIAN,
 349     .valid.min_access_size = 4,
 350     .valid.max_access_size = 4,
 351 };
 352
 353 static const VMStateDescription vmstate_bcm2835_property = {
 354     .name = TYPE_BCM2835_PROPERTY,
 355     .version_id = 1,
 356     .minimum_version_id = 1,
 357     .fields      = (VMStateField[]) {
 358         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 359         VMSTATE_UINT32(addr, BCM2835PropertyState),
 360         VMSTATE_BOOL(pending, BCM2835PropertyState),
 361         VMSTATE_END_OF_LIST()
 362     }
 363 };
 364
 365 static void bcm2835_property_init(Object *obj)
 366 {
 367     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 368
 369     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 370                           TYPE_BCM2835_PROPERTY, 0x10);
 371     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 372     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 373 }
 374
 375 static void bcm2835_property_reset(DeviceState *dev)
 376 {
 377     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 378
 379     s->pending = false;
 380 }
 381
 382 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 383 {
 384     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 385     Object *obj;
 386     Error *err = NULL;
 387
 388     obj = object_property_get_link(OBJECT(dev), "fb", &err);
 389     if (obj == NULL) {
 390         error_setg(errp, "%s: required fb link not found: %s",
 391                    __func__, error_get_pretty(err));
 392         return;
 393     }
 394
 395     s->fbdev = BCM2835_FB(obj);
 396
 397     obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
 398     if (obj == NULL) {
 399         error_setg(errp, "%s: required dma-mr link not found: %s",
 400                    __func__, error_get_pretty(err));
 401         return;
 402     }
 403
 404     s->dma_mr = MEMORY_REGION(obj);
 405     address_space_init(&s->dma_as, s->dma_mr, NULL);
 406
 407     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 408     qemu_macaddr_default_if_unset(&s->macaddr);
 409
 410     bcm2835_property_reset(dev);
 411 }
 412
 413 static Property bcm2835_property_props[] = {
 414     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 415     DEFINE_PROP_END_OF_LIST()
 416 };
 417
 418 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 419 {
 420     DeviceClass *dc = DEVICE_CLASS(klass);
 421
 422     dc->props = bcm2835_property_props;
 423     dc->realize = bcm2835_property_realize;
 424     dc->vmsd = &vmstate_bcm2835_property;
 425 }
 426
 427 static TypeInfo bcm2835_property_info = {
 428     .name          = TYPE_BCM2835_PROPERTY,
 429     .parent        = TYPE_SYS_BUS_DEVICE,
 430     .instance_size = sizeof(BCM2835PropertyState),
 431     .class_init    = bcm2835_property_class_init,
 432     .instance_init = bcm2835_property_init,
 433 };
 434
 435 static void bcm2835_property_register_types(void)
 436 {
 437     type_register_static(&bcm2835_property_info);
 438 }
 439
 440 type_init(bcm2835_property_register_types)