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->config.base);
 145             tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
 146             tmp_yres = newyres != NULL ? *newyres : s->fbdev->config.yres;
 147             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.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->config.xres;
 161             tmp_yres = newyres != NULL ? *newyres : s->fbdev->config.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->config.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->config.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->config.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->config.xres;
 219             tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.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 ?
 225                 *newxoffset : s->fbdev->config.xoffset;
 226             tmp_yoffset = newyoffset != NULL ?
 227                 *newyoffset : s->fbdev->config.yoffset;
 228             stl_le_phys(&s->dma_as, value + 12, tmp_xoffset);
 229             stl_le_phys(&s->dma_as, value + 16, tmp_yoffset);
 230             resplen = 8;
 231             break;
 232         case 0x00044009: /* Test virtual offset */
 233             resplen = 8;
 234             break;
 235         case 0x00048009: /* Set virtual offset */
 236             xoffset = ldl_le_phys(&s->dma_as, value + 12);
 237             newxoffset = &xoffset;
 238             yoffset = ldl_le_phys(&s->dma_as, value + 16);
 239             newyoffset = &yoffset;
 240             resplen = 8;
 241             break;
 242         case 0x0004000a: /* Get/Test/Set overscan */
 243         case 0x0004400a:
 244         case 0x0004800a:
 245             stl_le_phys(&s->dma_as, value + 12, 0);
 246             stl_le_phys(&s->dma_as, value + 16, 0);
 247             stl_le_phys(&s->dma_as, value + 20, 0);
 248             stl_le_phys(&s->dma_as, value + 24, 0);
 249             resplen = 16;
 250             break;
 251         case 0x0004800b: /* Set palette */
 252             offset = ldl_le_phys(&s->dma_as, value + 12);
 253             length = ldl_le_phys(&s->dma_as, value + 16);
 254             n = 0;
 255             while (n < length - offset) {
 256                 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
 257                 stl_le_phys(&s->dma_as,
 258                             s->fbdev->vcram_base + ((offset + n) << 2), color);
 259                 n++;
 260             }
 261             stl_le_phys(&s->dma_as, value + 12, 0);
 262             resplen = 4;
 263             break;
 264
 265         case 0x00060001: /* Get DMA channels */
 266             /* channels 2-5 */
 267             stl_le_phys(&s->dma_as, value + 12, 0x003C);
 268             resplen = 4;
 269             break;
 270
 271         case 0x00050001: /* Get command line */
 272             resplen = 0;
 273             break;
 274
 275         default:
 276             qemu_log_mask(LOG_GUEST_ERROR,
 277                           "bcm2835_property: unhandled tag %08x\n", tag);
 278             break;
 279         }
 280
 281         if (tag == 0) {
 282             break;
 283         }
 284
 285         stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 286         value += bufsize + 12;
 287     }
 288
 289     /* Reconfigure framebuffer if required */
 290     if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
 291         || newalpha) {
 292         bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
 293                                newyoffset, newbpp, newpixo, newalpha);
 294     }
 295
 296     /* Buffer response code */
 297     stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
 298 }
 299
 300 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 301                                       unsigned size)
 302 {
 303     BCM2835PropertyState *s = opaque;
 304     uint32_t res = 0;
 305
 306     switch (offset) {
 307     case MBOX_AS_DATA:
 308         res = MBOX_CHAN_PROPERTY | s->addr;
 309         s->pending = false;
 310         qemu_set_irq(s->mbox_irq, 0);
 311         break;
 312
 313     case MBOX_AS_PENDING:
 314         res = s->pending;
 315         break;
 316
 317     default:
 318         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 319                       __func__, offset);
 320         return 0;
 321     }
 322
 323     return res;
 324 }
 325
 326 static void bcm2835_property_write(void *opaque, hwaddr offset,
 327                                    uint64_t value, unsigned size)
 328 {
 329     BCM2835PropertyState *s = opaque;
 330
 331     switch (offset) {
 332     case MBOX_AS_DATA:
 333         /* bcm2835_mbox should check our pending status before pushing */
 334         assert(!s->pending);
 335         s->pending = true;
 336         bcm2835_property_mbox_push(s, value);
 337         qemu_set_irq(s->mbox_irq, 1);
 338         break;
 339
 340     default:
 341         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 342                       __func__, offset);
 343         return;
 344     }
 345 }
 346
 347 static const MemoryRegionOps bcm2835_property_ops = {
 348     .read = bcm2835_property_read,
 349     .write = bcm2835_property_write,
 350     .endianness = DEVICE_NATIVE_ENDIAN,
 351     .valid.min_access_size = 4,
 352     .valid.max_access_size = 4,
 353 };
 354
 355 static const VMStateDescription vmstate_bcm2835_property = {
 356     .name = TYPE_BCM2835_PROPERTY,
 357     .version_id = 1,
 358     .minimum_version_id = 1,
 359     .fields      = (VMStateField[]) {
 360         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 361         VMSTATE_UINT32(addr, BCM2835PropertyState),
 362         VMSTATE_BOOL(pending, BCM2835PropertyState),
 363         VMSTATE_END_OF_LIST()
 364     }
 365 };
 366
 367 static void bcm2835_property_init(Object *obj)
 368 {
 369     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 370
 371     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 372                           TYPE_BCM2835_PROPERTY, 0x10);
 373     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 374     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 375 }
 376
 377 static void bcm2835_property_reset(DeviceState *dev)
 378 {
 379     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 380
 381     s->pending = false;
 382 }
 383
 384 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 385 {
 386     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 387     Object *obj;
 388     Error *err = NULL;
 389
 390     obj = object_property_get_link(OBJECT(dev), "fb", &err);
 391     if (obj == NULL) {
 392         error_setg(errp, "%s: required fb link not found: %s",
 393                    __func__, error_get_pretty(err));
 394         return;
 395     }
 396
 397     s->fbdev = BCM2835_FB(obj);
 398
 399     obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
 400     if (obj == NULL) {
 401         error_setg(errp, "%s: required dma-mr link not found: %s",
 402                    __func__, error_get_pretty(err));
 403         return;
 404     }
 405
 406     s->dma_mr = MEMORY_REGION(obj);
 407     address_space_init(&s->dma_as, s->dma_mr, NULL);
 408
 409     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 410     qemu_macaddr_default_if_unset(&s->macaddr);
 411
 412     bcm2835_property_reset(dev);
 413 }
 414
 415 static Property bcm2835_property_props[] = {
 416     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 417     DEFINE_PROP_END_OF_LIST()
 418 };
 419
 420 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 421 {
 422     DeviceClass *dc = DEVICE_CLASS(klass);
 423
 424     dc->props = bcm2835_property_props;
 425     dc->realize = bcm2835_property_realize;
 426     dc->vmsd = &vmstate_bcm2835_property;
 427 }
 428
 429 static TypeInfo bcm2835_property_info = {
 430     .name          = TYPE_BCM2835_PROPERTY,
 431     .parent        = TYPE_SYS_BUS_DEVICE,
 432     .instance_size = sizeof(BCM2835PropertyState),
 433     .class_init    = bcm2835_property_class_init,
 434     .instance_init = bcm2835_property_init,
 435 };
 436
 437 static void bcm2835_property_register_types(void)
 438 {
 439     type_register_static(&bcm2835_property_info);
 440 }
 441
 442 type_init(bcm2835_property_register_types)