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_phys(&s->dma_as, value + 12, 0);
  67             /* size */
  68             stl_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_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  74             /* size */
  75             stl_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
 138         /* Frame buffer */
 139
 140         case 0x00040001: /* Allocate buffer */
 141             stl_phys(&s->dma_as, value + 12, s->fbdev->base);
 142             stl_phys(&s->dma_as, value + 16, s->fbdev->size);
 143             resplen = 8;
 144             break;
 145         case 0x00048001: /* Release buffer */
 146             resplen = 0;
 147             break;
 148         case 0x00040002: /* Blank screen */
 149             resplen = 4;
 150             break;
 151         case 0x00040003: /* Get display width/height */
 152         case 0x00040004:
 153             stl_phys(&s->dma_as, value + 12, s->fbdev->xres);
 154             stl_phys(&s->dma_as, value + 16, s->fbdev->yres);
 155             resplen = 8;
 156             break;
 157         case 0x00044003: /* Test display width/height */
 158         case 0x00044004:
 159             resplen = 8;
 160             break;
 161         case 0x00048003: /* Set display width/height */
 162         case 0x00048004:
 163             xres = ldl_phys(&s->dma_as, value + 12);
 164             newxres = &xres;
 165             yres = ldl_phys(&s->dma_as, value + 16);
 166             newyres = &yres;
 167             resplen = 8;
 168             break;
 169         case 0x00040005: /* Get depth */
 170             stl_phys(&s->dma_as, value + 12, s->fbdev->bpp);
 171             resplen = 4;
 172             break;
 173         case 0x00044005: /* Test depth */
 174             resplen = 4;
 175             break;
 176         case 0x00048005: /* Set depth */
 177             bpp = ldl_phys(&s->dma_as, value + 12);
 178             newbpp = &bpp;
 179             resplen = 4;
 180             break;
 181         case 0x00040006: /* Get pixel order */
 182             stl_phys(&s->dma_as, value + 12, s->fbdev->pixo);
 183             resplen = 4;
 184             break;
 185         case 0x00044006: /* Test pixel order */
 186             resplen = 4;
 187             break;
 188         case 0x00048006: /* Set pixel order */
 189             pixo = ldl_phys(&s->dma_as, value + 12);
 190             newpixo = &pixo;
 191             resplen = 4;
 192             break;
 193         case 0x00040007: /* Get alpha */
 194             stl_phys(&s->dma_as, value + 12, s->fbdev->alpha);
 195             resplen = 4;
 196             break;
 197         case 0x00044007: /* Test pixel alpha */
 198             resplen = 4;
 199             break;
 200         case 0x00048007: /* Set alpha */
 201             alpha = ldl_phys(&s->dma_as, value + 12);
 202             newalpha = &alpha;
 203             resplen = 4;
 204             break;
 205         case 0x00040008: /* Get pitch */
 206             stl_phys(&s->dma_as, value + 12, s->fbdev->pitch);
 207             resplen = 4;
 208             break;
 209         case 0x00040009: /* Get virtual offset */
 210             stl_phys(&s->dma_as, value + 12, s->fbdev->xoffset);
 211             stl_phys(&s->dma_as, value + 16, s->fbdev->yoffset);
 212             resplen = 8;
 213             break;
 214         case 0x00044009: /* Test virtual offset */
 215             resplen = 8;
 216             break;
 217         case 0x00048009: /* Set virtual offset */
 218             xoffset = ldl_phys(&s->dma_as, value + 12);
 219             newxoffset = &xoffset;
 220             yoffset = ldl_phys(&s->dma_as, value + 16);
 221             newyoffset = &yoffset;
 222             /*
 223             stl_phys(&s->dma_as, value + 12, bcm2835_fb.xres);
 224             stl_phys(&s->dma_as, value + 16, bcm2835_fb.yres);
 225             */
 226             resplen = 8;
 227             break;
 228         case 0x0004000a: /* Get/Test/Set overscan */
 229         case 0x0004400a:
 230         case 0x0004800a:
 231             stl_phys(&s->dma_as, value + 12, 0);
 232             stl_phys(&s->dma_as, value + 16, 0);
 233             stl_phys(&s->dma_as, value + 20, 0);
 234             stl_phys(&s->dma_as, value + 24, 0);
 235             resplen = 16;
 236             break;
 237
 238         case 0x0004800b: /* Set palette */
 239             offset = ldl_phys(&s->dma_as, value + 12);
 240             length = ldl_phys(&s->dma_as, value + 16);
 241             n = 0;
 242             while (n < length - offset) {
 243                 color = ldl_phys(&s->dma_as, value + 20 + (n << 2));
 244                 stl_phys(&s->dma_as,
 245                          s->fbdev->vcram_base + ((offset + n) << 2), color);
 246                 n++;
 247             }
 248             stl_phys(&s->dma_as, value + 12, 0);
 249             resplen = 4;
 250             break;
 251
 252         case 0x00060001: /* Get DMA channels */
 253             /* channels 2-5 */
 254             stl_phys(&s->dma_as, value + 12, 0x003C);
 255             resplen = 4;
 256             break;
 257
 258         case 0x00050001: /* Get command line */
 259             resplen = 0;
 260             break;
 261
 262         default:
 263             qemu_log_mask(LOG_GUEST_ERROR,
 264                           "bcm2835_property: unhandled tag %08x\n", tag);
 265             break;
 266         }
 267
 268         if (tag == 0) {
 269             break;
 270         }
 271
 272         stl_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 273         value += bufsize + 12;
 274     }
 275
 276     if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
 277         || newalpha) {
 278         bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
 279                                newyoffset, newbpp, newpixo, newalpha);
 280     }
 281
 282     /* Buffer response code */
 283     stl_phys(&s->dma_as, s->addr + 4, (1 << 31));
 284 }
 285
 286 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 287                                       unsigned size)
 288 {
 289     BCM2835PropertyState *s = opaque;
 290     uint32_t res = 0;
 291
 292     switch (offset) {
 293     case MBOX_AS_DATA:
 294         res = MBOX_CHAN_PROPERTY | s->addr;
 295         s->pending = false;
 296         qemu_set_irq(s->mbox_irq, 0);
 297         break;
 298
 299     case MBOX_AS_PENDING:
 300         res = s->pending;
 301         break;
 302
 303     default:
 304         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 305                       __func__, offset);
 306         return 0;
 307     }
 308
 309     return res;
 310 }
 311
 312 static void bcm2835_property_write(void *opaque, hwaddr offset,
 313                                    uint64_t value, unsigned size)
 314 {
 315     BCM2835PropertyState *s = opaque;
 316
 317     switch (offset) {
 318     case MBOX_AS_DATA:
 319         /* bcm2835_mbox should check our pending status before pushing */
 320         assert(!s->pending);
 321         s->pending = true;
 322         bcm2835_property_mbox_push(s, value);
 323         qemu_set_irq(s->mbox_irq, 1);
 324         break;
 325
 326     default:
 327         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
 328                       __func__, offset);
 329         return;
 330     }
 331 }
 332
 333 static const MemoryRegionOps bcm2835_property_ops = {
 334     .read = bcm2835_property_read,
 335     .write = bcm2835_property_write,
 336     .endianness = DEVICE_NATIVE_ENDIAN,
 337     .valid.min_access_size = 4,
 338     .valid.max_access_size = 4,
 339 };
 340
 341 static const VMStateDescription vmstate_bcm2835_property = {
 342     .name = TYPE_BCM2835_PROPERTY,
 343     .version_id = 1,
 344     .minimum_version_id = 1,
 345     .fields      = (VMStateField[]) {
 346         VMSTATE_MACADDR(macaddr, BCM2835PropertyState),
 347         VMSTATE_UINT32(addr, BCM2835PropertyState),
 348         VMSTATE_BOOL(pending, BCM2835PropertyState),
 349         VMSTATE_END_OF_LIST()
 350     }
 351 };
 352
 353 static void bcm2835_property_init(Object *obj)
 354 {
 355     BCM2835PropertyState *s = BCM2835_PROPERTY(obj);
 356
 357     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 358                           TYPE_BCM2835_PROPERTY, 0x10);
 359     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
 360     sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq);
 361 }
 362
 363 static void bcm2835_property_reset(DeviceState *dev)
 364 {
 365     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 366
 367     s->pending = false;
 368 }
 369
 370 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 371 {
 372     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
 373     Object *obj;
 374     Error *err = NULL;
 375
 376     obj = object_property_get_link(OBJECT(dev), "fb", &err);
 377     if (obj == NULL) {
 378         error_setg(errp, "%s: required fb link not found: %s",
 379                    __func__, error_get_pretty(err));
 380         return;
 381     }
 382
 383     s->fbdev = BCM2835_FB(obj);
 384
 385     obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
 386     if (obj == NULL) {
 387         error_setg(errp, "%s: required dma-mr link not found: %s",
 388                    __func__, error_get_pretty(err));
 389         return;
 390     }
 391
 392     s->dma_mr = MEMORY_REGION(obj);
 393     address_space_init(&s->dma_as, s->dma_mr, NULL);
 394
 395     /* TODO: connect to MAC address of USB NIC device, once we emulate it */
 396     qemu_macaddr_default_if_unset(&s->macaddr);
 397
 398     bcm2835_property_reset(dev);
 399 }
 400
 401 static Property bcm2835_property_props[] = {
 402     DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
 403     DEFINE_PROP_END_OF_LIST()
 404 };
 405
 406 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 407 {
 408     DeviceClass *dc = DEVICE_CLASS(klass);
 409
 410     dc->props = bcm2835_property_props;
 411     dc->realize = bcm2835_property_realize;
 412     dc->vmsd = &vmstate_bcm2835_property;
 413 }
 414
 415 static TypeInfo bcm2835_property_info = {
 416     .name          = TYPE_BCM2835_PROPERTY,
 417     .parent        = TYPE_SYS_BUS_DEVICE,
 418     .instance_size = sizeof(BCM2835PropertyState),
 419     .class_init    = bcm2835_property_class_init,
 420     .instance_init = bcm2835_property_init,
 421 };
 422
 423 static void bcm2835_property_register_types(void)
 424 {
 425     type_register_static(&bcm2835_property_info);
 426 }
 427
 428 type_init(bcm2835_property_register_types)