hw/misc/bcm2835_property.c

   1 /*
   2  * Raspberry Pi emulation (c) 2012 Gregory Estrade
   3  *
   4  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #include "qemu/osdep.h"
   9 #include "qapi/error.h"
  10 #include "hw/misc/bcm2835_property.h"
  11 #include "hw/qdev-properties.h"
  12 #include "migration/vmstate.h"
  13 #include "hw/irq.h"
  14 #include "hw/misc/bcm2835_mbox_defs.h"
  15 #include "sysemu/dma.h"
  16 #include "qemu/log.h"
  17 #include "qemu/module.h"
  18 #include "trace.h"
  19
  20 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
  21
  22 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
  23 {
  24     uint32_t tag;
  25     uint32_t bufsize;
  26     uint32_t tot_len;
  27     size_t resplen;
  28     uint32_t tmp;
  29     int n;
  30     uint32_t offset, length, color;
  31
  32     /*
  33      * Copy the current state of the framebuffer config; we will update
  34      * this copy as we process tags and then ask the framebuffer to use
  35      * it at the end.
  36      */
  37     BCM2835FBConfig fbconfig = s->fbdev->config;
  38     bool fbconfig_updated = false;
  39
  40     value &= ~0xf;
  41
  42     s->addr = value;
  43
  44     tot_len = ldl_le_phys(&s->dma_as, value);
  45
  46     /* @(addr + 4) : Buffer response code */
  47     value = s->addr + 8;
  48     while (value + 8 <= s->addr + tot_len) {
  49         tag = ldl_le_phys(&s->dma_as, value);
  50         bufsize = ldl_le_phys(&s->dma_as, value + 4);
  51         /* @(value + 8) : Request/response indicator */
  52         resplen = 0;
  53         switch (tag) {
  54         case 0x00000000: /* End tag */
  55             break;
  56         case 0x00000001: /* Get firmware revision */
  57             stl_le_phys(&s->dma_as, value + 12, 346337);
  58             resplen = 4;
  59             break;
  60         case 0x00010001: /* Get board model */
  61             qemu_log_mask(LOG_UNIMP,
  62                           "bcm2835_property: 0x%08x get board model NYI\n",
  63                           tag);
  64             resplen = 4;
  65             break;
  66         case 0x00010002: /* Get board revision */
  67             stl_le_phys(&s->dma_as, value + 12, s->board_rev);
  68             resplen = 4;
  69             break;
  70         case 0x00010003: /* Get board MAC address */
  71             resplen = sizeof(s->macaddr.a);
  72             dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen,
  73                              MEMTXATTRS_UNSPECIFIED);
  74             break;
  75         case 0x00010004: /* Get board serial */
  76             qemu_log_mask(LOG_UNIMP,
  77                           "bcm2835_property: 0x%08x get board serial NYI\n",
  78                           tag);
  79             resplen = 8;
  80             break;
  81         case 0x00010005: /* Get ARM memory */
  82             /* base */
  83             stl_le_phys(&s->dma_as, value + 12, 0);
  84             /* size */
  85             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
  86             resplen = 8;
  87             break;
  88         case 0x00010006: /* Get VC memory */
  89             /* base */
  90             stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  91             /* size */
  92             stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
  93             resplen = 8;
  94             break;
  95         case 0x00028001: /* Set power state */
  96             /* Assume that whatever device they asked for exists,
  97              * and we'll just claim we set it to the desired state
  98              */
  99             tmp = ldl_le_phys(&s->dma_as, value + 16);
 100             stl_le_phys(&s->dma_as, value + 16, (tmp & 1));
 101             resplen = 8;
 102             break;
 103
 104         /* Clocks */
 105
 106         case 0x00030001: /* Get clock state */
 107             stl_le_phys(&s->dma_as, value + 16, 0x1);
 108             resplen = 8;
 109             break;
 110
 111         case 0x00038001: /* Set clock state */
 112             qemu_log_mask(LOG_UNIMP,
 113                           "bcm2835_property: 0x%08x set clock state NYI\n",
 114                           tag);
 115             resplen = 8;
 116             break;
 117
 118         case 0x00030002: /* Get clock rate */
 119         case 0x00030004: /* Get max clock rate */
 120         case 0x00030007: /* Get min clock rate */
 121             switch (ldl_le_phys(&s->dma_as, value + 12)) {
 122             case 1: /* EMMC */
 123                 stl_le_phys(&s->dma_as, value + 16, 50000000);
 124                 break;
 125             case 2: /* UART */
 126                 stl_le_phys(&s->dma_as, value + 16, 3000000);
 127                 break;
 128             default:
 129                 stl_le_phys(&s->dma_as, value + 16, 700000000);
 130                 break;
 131             }
 132             resplen = 8;
 133             break;
 134
 135         case 0x00038002: /* Set clock rate */
 136         case 0x00038004: /* Set max clock rate */
 137         case 0x00038007: /* Set min clock rate */
 138             qemu_log_mask(LOG_UNIMP,
 139                           "bcm2835_property: 0x%08x set clock rate NYI\n",
 140                           tag);
 141             resplen = 8;
 142             break;
 143
 144         /* Temperature */
 145
 146         case 0x00030006: /* Get temperature */
 147             stl_le_phys(&s->dma_as, value + 16, 25000);
 148             resplen = 8;
 149             break;
 150
 151         case 0x0003000A: /* Get max temperature */
 152             stl_le_phys(&s->dma_as, value + 16, 99000);
 153             resplen = 8;
 154             break;
 155
 156         /* Frame buffer */
 157
 158         case 0x00040001: /* Allocate buffer */
 159             stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
 160             stl_le_phys(&s->dma_as, value + 16,
 161                         bcm2835_fb_get_size(&fbconfig));
 162             resplen = 8;
 163             break;
 164         case 0x00048001: /* Release buffer */
 165             resplen = 0;
 166             break;
 167         case 0x00040002: /* Blank screen */
 168             resplen = 4;
 169             break;
 170         case 0x00044003: /* Test physical display width/height */
 171         case 0x00044004: /* Test virtual display width/height */
 172             resplen = 8;
 173             break;
 174         case 0x00048003: /* Set physical display width/height */
 175             fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
 176             fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
 177             bcm2835_fb_validate_config(&fbconfig);
 178             fbconfig_updated = true;
 179             /* fall through */
 180         case 0x00040003: /* Get physical display width/height */
 181             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
 182             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
 183             resplen = 8;
 184             break;
 185         case 0x00048004: /* Set virtual display width/height */
 186             fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
 187             fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
 188             bcm2835_fb_validate_config(&fbconfig);
 189             fbconfig_updated = true;
 190             /* fall through */
 191         case 0x00040004: /* Get virtual display width/height */
 192             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
 193             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
 194             resplen = 8;
 195             break;
 196         case 0x00044005: /* Test depth */
 197             resplen = 4;
 198             break;
 199         case 0x00048005: /* Set depth */
 200             fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
 201             bcm2835_fb_validate_config(&fbconfig);
 202             fbconfig_updated = true;
 203             /* fall through */
 204         case 0x00040005: /* Get depth */
 205             stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
 206             resplen = 4;
 207             break;
 208         case 0x00044006: /* Test pixel order */
 209             resplen = 4;
 210             break;
 211         case 0x00048006: /* Set pixel order */
 212             fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
 213             bcm2835_fb_validate_config(&fbconfig);
 214             fbconfig_updated = true;
 215             /* fall through */
 216         case 0x00040006: /* Get pixel order */
 217             stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
 218             resplen = 4;
 219             break;
 220         case 0x00044007: /* Test pixel alpha */
 221             resplen = 4;
 222             break;
 223         case 0x00048007: /* Set alpha */
 224             fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
 225             bcm2835_fb_validate_config(&fbconfig);
 226             fbconfig_updated = true;
 227             /* fall through */
 228         case 0x00040007: /* Get alpha */
 229             stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
 230             resplen = 4;
 231             break;
 232         case 0x00040008: /* Get pitch */
 233             stl_le_phys(&s->dma_as, value + 12,
 234                         bcm2835_fb_get_pitch(&fbconfig));
 235             resplen = 4;
 236             break;
 237         case 0x00044009: /* Test virtual offset */
 238             resplen = 8;
 239             break;
 240         case 0x00048009: /* Set virtual offset */
 241             fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
 242             fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
 243             bcm2835_fb_validate_config(&fbconfig);
 244             fbconfig_updated = true;
 245             /* fall through */
 246         case 0x00040009: /* Get virtual offset */
 247             stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
 248             stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
 249             resplen = 8;
 250             break;
 251         case 0x0004000a: /* Get/Test/Set overscan */
 252         case 0x0004400a:
 253         case 0x0004800a:
 254             stl_le_phys(&s->dma_as, value + 12, 0);
 255             stl_le_phys(&s->dma_as, value + 16, 0);
 256             stl_le_phys(&s->dma_as, value + 20, 0);
 257             stl_le_phys(&s->dma_as, value + 24, 0);
 258             resplen = 16;
 259             break;
 260         case 0x0004800b: /* Set palette */
 261             offset = ldl_le_phys(&s->dma_as, value + 12);
 262             length = ldl_le_phys(&s->dma_as, value + 16);
 263             n = 0;
 264             while (n < length - offset) {
 265                 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2));
 266                 stl_le_phys(&s->dma_as,
 267                             s->fbdev->vcram_base + ((offset + n) << 2), color);
 268                 n++;
 269             }
 270             stl_le_phys(&s->dma_as, value + 12, 0);
 271             resplen = 4;
 272             break;
 273
 274         case 0x00060001: /* Get DMA channels */
 275             /* channels 2-5 */
 276             stl_le_phys(&s->dma_as, value + 12, 0x003C);
 277             resplen = 4;
 278             break;
 279
 280         case 0x00050001: /* Get command line */
 281             resplen = 0;
 282             break;
 283
 284         default:
 285             qemu_log_mask(LOG_UNIMP,
 286                           "bcm2835_property: unhandled tag 0x%08x\n", tag);
 287             break;
 288         }
 289
 290         trace_bcm2835_mbox_property(tag, bufsize, resplen);
 291         if (tag == 0) {
 292             break;
 293         }
 294
 295         stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 296         value += bufsize + 12;
 297     }
 298
 299     /* Reconfigure framebuffer if required */
 300     if (fbconfig_updated) {
 301         bcm2835_fb_reconfigure(s->fbdev, &fbconfig);
 302     }
 303
 304     /* Buffer response code */
 305     stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31));
 306 }
 307
 308 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 309                                       unsigned size)
 310 {
 311     BCM2835PropertyState *s = opaque;
 312     uint32_t res = 0;
 313
 314     switch (offset) {
 315     case MBOX_AS_DATA:
 316         res = MBOX_CHAN_PROPERTY | s->addr;
 317         s->pending = false;
 318         qemu_set_irq(s->mbox_irq, 0);
 319         break;
 320
 321     case MBOX_AS_PENDING:
 322         res = s->pending;
 323         break;
 324
 325     default:
 326         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 327                       __func__, offset);
 328         return 0;
 329     }
 330
 331     return res;
 332 }
 333
 334 static void bcm2835_property_write(void *opaque, hwaddr offset,
 335                                    uint64_t value, unsigned size)
 336 {
 337     BCM2835PropertyState *s = opaque;
 338
 339     switch (offset) {
 340     case MBOX_AS_DATA:
 341         /* bcm2835_mbox should check our pending status before pushing */
 342         assert(!s->pending);
 343         s->pending = true;
 344         bcm2835_property_mbox_push(s, value);
 345         qemu_set_irq(s->mbox_irq, 1);
 346         break;
 347
 348     default:
 349         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 350                       __func__, offset);
 351         return;
 352     }
 353 }
 354
 355 static const MemoryRegionOps bcm2835_property_ops = {
 356     .read = bcm2835_property_read,
 357     .write = bcm2835_property_write,
 358     .endianness = DEVICE_NATIVE_ENDIAN,
 359     .valid.min_access_size = 4,
 360     .valid.max_access_size = 4,
 361 };
 362
 363 static const VMStateDescription vmstate_bcm2835_property = {
 364     .name = TYPE_BCM2835_PROPERTY,
 365     .version_id = 1,
 366     .minimum_version_id = 1,
 367     .fields      = (VMStateField[]) {
 368         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 369         VMSTATE_UINT32(addr, BCM2835PropertyState),
 370         VMSTATE_BOOL(pending, BCM2835PropertyState),
 371         VMSTATE_END_OF_LIST()
 372     }
 373 };
 374
 375 static void bcm2835_property_init(Object *obj)
 376 {
 377     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 378
 379     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 380                           TYPE_BCM2835_PROPERTY, 0x10);
 381     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 382     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 383 }
 384
 385 static void bcm2835_property_reset(DeviceState *dev)
 386 {
 387     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 388
 389     s->pending = false;
 390 }
 391
 392 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 393 {
 394     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 395     Object *obj;
 396
 397     obj = object_property_get_link(OBJECT(dev), "fb", &error_abort);
 398     s->fbdev = BCM2835_FB(obj);
 399
 400     obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
 401     s->dma_mr = MEMORY_REGION(obj);
 402     address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory");
 403
 404     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 405     qemu_macaddr_default_if_unset(&s->macaddr);
 406
 407     bcm2835_property_reset(dev);
 408 }
 409
 410 static Property bcm2835_property_props[] = {
 411     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 412     DEFINE_PROP_END_OF_LIST()
 413 };
 414
 415 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 416 {
 417     DeviceClass *dc = DEVICE_CLASS(klass);
 418
 419     device_class_set_props(dc, bcm2835_property_props);
 420     dc->realize = bcm2835_property_realize;
 421     dc->vmsd = &vmstate_bcm2835_property;
 422 }
 423
 424 static const TypeInfo bcm2835_property_info = {
 425     .name          = TYPE_BCM2835_PROPERTY,
 426     .parent        = TYPE_SYS_BUS_DEVICE,
 427     .instance_size = sizeof(BCM2835PropertyState),
 428     .class_init    = bcm2835_property_class_init,
 429     .instance_init = bcm2835_property_init,
 430 };
 431
 432 static void bcm2835_property_register_types(void)
 433 {
 434     type_register_static(&bcm2835_property_info);
 435 }
 436
 437 type_init(bcm2835_property_register_types)