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