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/qdev-properties.h"
  10 #include "migration/vmstate.h"
  11 #include "hw/irq.h"
  12 #include "hw/misc/bcm2835_mbox_defs.h"
  13 #include "sysemu/dma.h"
  14 #include "qemu/log.h"
  15 #include "qemu/module.h"
  16 #include "trace.h"
  17
  18 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
  19
  20 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
  21 {
  22     uint32_t tag;
  23     uint32_t bufsize;
  24     uint32_t tot_len;
  25     size_t resplen;
  26     uint32_t tmp;
  27     int n;
  28     uint32_t offset, length, color;
  29
  30     /*
  31      * Copy the current state of the framebuffer config; we will update
  32      * this copy as we process tags and then ask the framebuffer to use
  33      * it at the end.
  34      */
  35     BCM2835FBConfig fbconfig = s->fbdev->config;
  36     bool fbconfig_updated = false;
  37
  38     value &= ~0xf;
  39
  40     s->addr = value;
  41
  42     tot_len = ldl_le_phys(&s->dma_as, value);
  43
  44     /* @(addr + 4) : Buffer response code */
  45     value = s->addr + 8;
  46     while (value + 8 <= s->addr + tot_len) {
  47         tag = ldl_le_phys(&s->dma_as, value);
  48         bufsize = ldl_le_phys(&s->dma_as, value + 4);
  49         /* @(value + 8) : Request/response indicator */
  50         resplen = 0;
  51         switch (tag) {
  52         case 0x00000000: /* End tag */
  53             break;
  54         case 0x00000001: /* Get firmware revision */
  55             stl_le_phys(&s->dma_as, value + 12, 346337);
  56             resplen = 4;
  57             break;
  58         case 0x00010001: /* Get board model */
  59             qemu_log_mask(LOG_UNIMP,
  60                           "bcm2835_property: 0x%08x get board model NYI\n",
  61                           tag);
  62             resplen = 4;
  63             break;
  64         case 0x00010002: /* Get board revision */
  65             stl_le_phys(&s->dma_as, value + 12, s->board_rev);
  66             resplen = 4;
  67             break;
  68         case 0x00010003: /* Get board MAC address */
  69             resplen = sizeof(s->macaddr.a);
  70             dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen);
  71             break;
  72         case 0x00010004: /* Get board serial */
  73             qemu_log_mask(LOG_UNIMP,
  74                           "bcm2835_property: 0x%08x get board serial NYI\n",
  75                           tag);
  76             resplen = 8;
  77             break;
  78         case 0x00010005: /* Get ARM memory */
  79             /* base */
  80             stl_le_phys(&s->dma_as, value + 12, 0);
  81             /* size */
  82             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
  83             resplen = 8;
  84             break;
  85         case 0x00010006: /* Get VC memory */
  86             /* base */
  87             stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  88             /* size */
  89             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
  90             resplen = 8;
  91             break;
  92         case 0x00028001: /* Set power state */
  93             /* Assume that whatever device they asked for exists,
  94              * and we'll just claim we set it to the desired state
  95              */
  96             tmp = ldl_le_phys(&s->dma_as, value + 16);
  97             stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
  98             resplen = 8;
  99             break;
 100
 101         /* Clocks */
 102
 103         case 0x00030001: /* Get clock state */
 104             stl_le_phys(&s->dma_as, value + 16, 0x1);
 105             resplen = 8;
 106             break;
 107
 108         case 0x00038001: /* Set clock state */
 109             qemu_log_mask(LOG_UNIMP,
 110                           "bcm2835_property: 0x%08x set clock state NYI\n",
 111                           tag);
 112             resplen = 8;
 113             break;
 114
 115         case 0x00030002: /* Get clock rate */
 116         case 0x00030004: /* Get max clock rate */
 117         case 0x00030007: /* Get min clock rate */
 118             switch (ldl_le_phys(&s->dma_as, value + 12)) {
 119             case 1: /* EMMC */
 120                 stl_le_phys(&s->dma_as, value + 16, 50000000);
 121                 break;
 122             case 2: /* UART */
 123                 stl_le_phys(&s->dma_as, value + 16, 3000000);
 124                 break;
 125             default:
 126                 stl_le_phys(&s->dma_as, value + 16, 700000000);
 127                 break;
 128             }
 129             resplen = 8;
 130             break;
 131
 132         case 0x00038002: /* Set clock rate */
 133         case 0x00038004: /* Set max clock rate */
 134         case 0x00038007: /* Set min clock rate */
 135             qemu_log_mask(LOG_UNIMP,
 136                           "bcm2835_property: 0x%08x set clock rate NYI\n",
 137                           tag);
 138             resplen = 8;
 139             break;
 140
 141         /* Temperature */
 142
 143         case 0x00030006: /* Get temperature */
 144             stl_le_phys(&s->dma_as, value + 16, 25000);
 145             resplen = 8;
 146             break;
 147
 148         case 0x0003000A: /* Get max temperature */
 149             stl_le_phys(&s->dma_as, value + 16, 99000);
 150             resplen = 8;
 151             break;
 152
 153         /* Frame buffer */
 154
 155         case 0x00040001: /* Allocate buffer */
 156             stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
 157             stl_le_phys(&s->dma_as, value + 16,
 158                         bcm2835_fb_get_size(&fbconfig));
 159             resplen = 8;
 160             break;
 161         case 0x00048001: /* Release buffer */
 162             resplen = 0;
 163             break;
 164         case 0x00040002: /* Blank screen */
 165             resplen = 4;
 166             break;
 167         case 0x00044003: /* Test physical display width/height */
 168         case 0x00044004: /* Test virtual display width/height */
 169             resplen = 8;
 170             break;
 171         case 0x00048003: /* Set physical display width/height */
 172             fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
 173             fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
 174             bcm2835_fb_validate_config(&fbconfig);
 175             fbconfig_updated = true;
 176             /* fall through */
 177         case 0x00040003: /* Get physical display width/height */
 178             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
 179             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
 180             resplen = 8;
 181             break;
 182         case 0x00048004: /* Set virtual display width/height */
 183             fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
 184             fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
 185             bcm2835_fb_validate_config(&fbconfig);
 186             fbconfig_updated = true;
 187             /* fall through */
 188         case 0x00040004: /* Get virtual display width/height */
 189             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
 190             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
 191             resplen = 8;
 192             break;
 193         case 0x00044005: /* Test depth */
 194             resplen = 4;
 195             break;
 196         case 0x00048005: /* Set depth */
 197             fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
 198             bcm2835_fb_validate_config(&fbconfig);
 199             fbconfig_updated = true;
 200             /* fall through */
 201         case 0x00040005: /* Get depth */
 202             stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
 203             resplen = 4;
 204             break;
 205         case 0x00044006: /* Test pixel order */
 206             resplen = 4;
 207             break;
 208         case 0x00048006: /* Set pixel order */
 209             fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
 210             bcm2835_fb_validate_config(&fbconfig);
 211             fbconfig_updated = true;
 212             /* fall through */
 213         case 0x00040006: /* Get pixel order */
 214             stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
 215             resplen = 4;
 216             break;
 217         case 0x00044007: /* Test pixel alpha */
 218             resplen = 4;
 219             break;
 220         case 0x00048007: /* Set alpha */
 221             fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
 222             bcm2835_fb_validate_config(&fbconfig);
 223             fbconfig_updated = true;
 224             /* fall through */
 225         case 0x00040007: /* Get alpha */
 226             stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
 227             resplen = 4;
 228             break;
 229         case 0x00040008: /* Get pitch */
 230             stl_le_phys(&s->dma_as, value + 12,
 231                         bcm2835_fb_get_pitch(&fbconfig));
 232             resplen = 4;
 233             break;
 234         case 0x00044009: /* Test virtual offset */
 235             resplen = 8;
 236             break;
 237         case 0x00048009: /* Set virtual offset */
 238             fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
 239             fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
 240             bcm2835_fb_validate_config(&fbconfig);
 241             fbconfig_updated = true;
 242             /* fall through */
 243         case 0x00040009: /* Get virtual offset */
 244             stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
 245             stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
 246             resplen = 8;
 247             break;
 248         case 0x0004000a: /* Get/Test/Set overscan */
 249         case 0x0004400a:
 250         case 0x0004800a:
 251             stl_le_phys(&s->dma_as, value + 12, 0);
 252             stl_le_phys(&s->dma_as, value + 16, 0);
 253             stl_le_phys(&s->dma_as, value + 20, 0);
 254             stl_le_phys(&s->dma_as, value + 24, 0);
 255             resplen = 16;
 256             break;
 257         case 0x0004800b: /* Set palette */
 258             offset = ldl_le_phys(&s->dma_as, value + 12);
 259             length = ldl_le_phys(&s->dma_as, value + 16);
 260             n = 0;
 261             while (n < length - offset) {
 262                 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
 263                 stl_le_phys(&s->dma_as,
 264                             s->fbdev->vcram_base + ((offset + n) << 2), color);
 265                 n++;
 266             }
 267             stl_le_phys(&s->dma_as, value + 12, 0);
 268             resplen = 4;
 269             break;
 270
 271         case 0x00060001: /* Get DMA channels */
 272             /* channels 2-5 */
 273             stl_le_phys(&s->dma_as, value + 12, 0x003C);
 274             resplen = 4;
 275             break;
 276
 277         case 0x00050001: /* Get command line */
 278             resplen = 0;
 279             break;
 280
 281         default:
 282             qemu_log_mask(LOG_UNIMP,
 283                           "bcm2835_property: unhandled tag 0x%08x\n", tag);
 284             break;
 285         }
 286
 287         trace_bcm2835_mbox_property(tag, bufsize, resplen);
 288         if (tag == 0) {
 289             break;
 290         }
 291
 292         stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 293         value += bufsize + 12;
 294     }
 295
 296     /* Reconfigure framebuffer if required */
 297     if (fbconfig_updated) {
 298         bcm2835_fb_reconfigure(s->fbdev, &fbconfig);
 299     }
 300
 301     /* Buffer response code */
 302     stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
 303 }
 304
 305 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 306                                       unsigned size)
 307 {
 308     BCM2835PropertyState *s = opaque;
 309     uint32_t res = 0;
 310
 311     switch (offset) {
 312     case MBOX_AS_DATA:
 313         res = MBOX_CHAN_PROPERTY | s->addr;
 314         s->pending = false;
 315         qemu_set_irq(s->mbox_irq, 0);
 316         break;
 317
 318     case MBOX_AS_PENDING:
 319         res = s->pending;
 320         break;
 321
 322     default:
 323         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 324                       __func__, offset);
 325         return 0;
 326     }
 327
 328     return res;
 329 }
 330
 331 static void bcm2835_property_write(void *opaque, hwaddr offset,
 332                                    uint64_t value, unsigned size)
 333 {
 334     BCM2835PropertyState *s = opaque;
 335
 336     switch (offset) {
 337     case MBOX_AS_DATA:
 338         /* bcm2835_mbox should check our pending status before pushing */
 339         assert(!s->pending);
 340         s->pending = true;
 341         bcm2835_property_mbox_push(s, value);
 342         qemu_set_irq(s->mbox_irq, 1);
 343         break;
 344
 345     default:
 346         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 347                       __func__, offset);
 348         return;
 349     }
 350 }
 351
 352 static const MemoryRegionOps bcm2835_property_ops = {
 353     .read = bcm2835_property_read,
 354     .write = bcm2835_property_write,
 355     .endianness = DEVICE_NATIVE_ENDIAN,
 356     .valid.min_access_size = 4,
 357     .valid.max_access_size = 4,
 358 };
 359
 360 static const VMStateDescription vmstate_bcm2835_property = {
 361     .name = TYPE_BCM2835_PROPERTY,
 362     .version_id = 1,
 363     .minimum_version_id = 1,
 364     .fields      = (VMStateField[]) {
 365         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 366         VMSTATE_UINT32(addr, BCM2835PropertyState),
 367         VMSTATE_BOOL(pending, BCM2835PropertyState),
 368         VMSTATE_END_OF_LIST()
 369     }
 370 };
 371
 372 static void bcm2835_property_init(Object *obj)
 373 {
 374     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 375
 376     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 377                           TYPE_BCM2835_PROPERTY, 0x10);
 378     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 379     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 380 }
 381
 382 static void bcm2835_property_reset(DeviceState *dev)
 383 {
 384     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 385
 386     s->pending = false;
 387 }
 388
 389 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 390 {
 391     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 392     Object *obj;
 393     Error *err = NULL;
 394
 395     obj = object_property_get_link(OBJECT(dev), "fb", &err);
 396     if (obj == NULL) {
 397         error_setg(errp, "%s: required fb link not found: %s",
 398                    __func__, error_get_pretty(err));
 399         return;
 400     }
 401
 402     s->fbdev = BCM2835_FB(obj);
 403
 404     obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
 405     if (obj == NULL) {
 406         error_setg(errp, "%s: required dma-mr link not found: %s",
 407                    __func__, error_get_pretty(err));
 408         return;
 409     }
 410
 411     s->dma_mr = MEMORY_REGION(obj);
 412     address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory");
 413
 414     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 415     qemu_macaddr_default_if_unset(&s->macaddr);
 416
 417     bcm2835_property_reset(dev);
 418 }
 419
 420 static Property bcm2835_property_props[] = {
 421     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 422     DEFINE_PROP_END_OF_LIST()
 423 };
 424
 425 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 426 {
 427     DeviceClass *dc = DEVICE_CLASS(klass);
 428
 429     dc->props = bcm2835_property_props;
 430     dc->realize = bcm2835_property_realize;
 431     dc->vmsd = &vmstate_bcm2835_property;
 432 }
 433
 434 static TypeInfo bcm2835_property_info = {
 435     .name          = TYPE_BCM2835_PROPERTY,
 436     .parent        = TYPE_SYS_BUS_DEVICE,
 437     .instance_size = sizeof(BCM2835PropertyState),
 438     .class_init    = bcm2835_property_class_init,
 439     .instance_init = bcm2835_property_init,
 440 };
 441
 442 static void bcm2835_property_register_types(void)
 443 {
 444     type_register_static(&bcm2835_property_info);
 445 }
 446
 447 type_init(bcm2835_property_register_types)