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 "hw/display/framebuffer.h"
   7 #include "hw/sysbus.h"
   8 #include "ui/console.h"
   9 #include "ui/pixel_ops.h"
  10 #include "exec/address-spaces.h"
  11 #include "hw/arm/bcm2835_mbox.h"
  12 #include "hw/display/bcm2835_fb.h"
  13
  14 #define TYPE_BCM2835_PROPERTY "bcm2835_property"
  15 #define BCM2835_PROPERTY(obj) \
  16         OBJECT_CHECK(Bcm2835PropertyState, (obj), TYPE_BCM2835_PROPERTY)
  17
  18 typedef struct {
  19     SysBusDevice busdev;
  20     MemoryRegion *dma_mr;
  21     AddressSpace dma_as;
  22     Bcm2835FbState *fbdev;
  23     MemoryRegion iomem;
  24     uint32_t addr;
  25     int pending;
  26     qemu_irq mbox_irq;
  27 } Bcm2835PropertyState;
  28
  29 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
  30
  31 static void bcm2835_property_mbox_push(Bcm2835PropertyState *s, uint32_t value)
  32 {
  33     uint32_t tag;
  34     uint32_t bufsize;
  35     uint32_t tot_len;
  36     int n;
  37     size_t resplen;
  38     uint32_t offset, length, color;
  39     uint32_t tmp;
  40     uint32_t xres, yres, xoffset, yoffset, bpp, pixo, alpha;
  41     uint32_t *newxres = NULL, *newyres = NULL, *newxoffset = NULL,
  42         *newyoffset = NULL, *newbpp = NULL, *newpixo = NULL, *newalpha = NULL;
  43
  44     value &= ~0xf;
  45
  46     s->addr = value;
  47
  48     tot_len = ldl_phys(&s->dma_as, value);
  49
  50     /* @(addr + 4) : Buffer response code */
  51     value = s->addr + 8;
  52     while (value + 8 <= s->addr + tot_len) {
  53         tag = ldl_phys(&s->dma_as, value);
  54         bufsize = ldl_phys(&s->dma_as, value + 4);
  55         /* @(value + 8) : Request/response indicator */
  56         resplen = 0;
  57         switch (tag) {
  58         case 0x00000000: /* End tag */
  59             break;
  60         case 0x00000001: /* Get firmware revision */
  61             stl_phys(&s->dma_as, value + 12, 346337);
  62             resplen = 4;
  63             break;
  64
  65         case 0x00010001: /* Get board model */
  66             resplen = 4;
  67             break;
  68         case 0x00010002: /* Get board revision */
  69             resplen = 4;
  70             break;
  71         case 0x00010003: /* Get board MAC address */
  72             /* write the first four bytes of the 6-byte MAC */
  73             stl_phys(&s->dma_as, value + 12, 0xB827EBD0);
  74             /* write the last two bytes, avoid any write past the buffer end */
  75             stb_phys(&s->dma_as, value + 16, 0xEE);
  76             stb_phys(&s->dma_as, value + 17, 0xDF);
  77             resplen = 6;
  78             break;
  79         case 0x00010004: /* Get board serial */
  80             resplen = 8;
  81             break;
  82         case 0x00010005: /* Get ARM memory */
  83             /* base */
  84             stl_phys(&s->dma_as, value + 12, 0);
  85             /* size */
  86             stl_phys(&s->dma_as, value + 16, s->fbdev->vcram_base);
  87             resplen = 8;
  88             break;
  89         case 0x00010006: /* Get VC memory */
  90             /* base */
  91             stl_phys(&s->dma_as, value + 12, s->fbdev->vcram_base);
  92             /* size */
  93             stl_phys(&s->dma_as, value + 16, s->fbdev->vcram_size);
  94             resplen = 8;
  95             break;
  96         case 0x00028001: /* Set power state */
  97             /* Assume that whatever device they asked for exists,
  98              * and we'll just claim we set it to the desired state */
  99             tmp = ldl_phys(&s->dma_as, value + 16);
 100             stl_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_phys(&s->dma_as, value + 16, 0x1);
 108             resplen = 8;
 109             break;
 110
 111         case 0x00038001: /* Set clock state */
 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_phys(&s->dma_as, value + 12)) {
 119             case 1: /* EMMC */
 120                 stl_phys(&s->dma_as, value + 16, 50000000);
 121                 break;
 122             case 2: /* UART */
 123                 stl_phys(&s->dma_as, value + 16, 3000000);
 124                 break;
 125             default:
 126                 stl_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             resplen = 8;
 136             break;
 137
 138         /* Temperature */
 139
 140         case 0x00030006: /* Get temperature */
 141             stl_phys(&s->dma_as, value + 16, 25000);
 142             resplen = 8;
 143             break;
 144
 145         case 0x0003000A: /* Get max temperature */
 146             stl_phys(&s->dma_as, value + 16, 99000);
 147             resplen = 8;
 148             break;
 149
 150
 151         /* Frame buffer */
 152
 153         case 0x00040001: /* Allocate buffer */
 154             stl_phys(&s->dma_as, value + 12, s->fbdev->base);
 155             stl_phys(&s->dma_as, value + 16, s->fbdev->size);
 156             resplen = 8;
 157             break;
 158         case 0x00048001: /* Release buffer */
 159             resplen = 0;
 160             break;
 161         case 0x00040002: /* Blank screen */
 162             resplen = 4;
 163             break;
 164         case 0x00040003: /* Get display width/height */
 165         case 0x00040004:
 166             stl_phys(&s->dma_as, value + 12, s->fbdev->xres);
 167             stl_phys(&s->dma_as, value + 16, s->fbdev->yres);
 168             resplen = 8;
 169             break;
 170         case 0x00044003: /* Test display width/height */
 171         case 0x00044004:
 172             resplen = 8;
 173             break;
 174         case 0x00048003: /* Set display width/height */
 175         case 0x00048004:
 176             xres = ldl_phys(&s->dma_as, value + 12);
 177             newxres = &xres;
 178             yres = ldl_phys(&s->dma_as, value + 16);
 179             newyres = &yres;
 180             resplen = 8;
 181             break;
 182         case 0x00040005: /* Get depth */
 183             stl_phys(&s->dma_as, value + 12, s->fbdev->bpp);
 184             resplen = 4;
 185             break;
 186         case 0x00044005: /* Test depth */
 187             resplen = 4;
 188             break;
 189         case 0x00048005: /* Set depth */
 190             bpp = ldl_phys(&s->dma_as, value + 12);
 191             newbpp = &bpp;
 192             resplen = 4;
 193             break;
 194         case 0x00040006: /* Get pixel order */
 195             stl_phys(&s->dma_as, value + 12, s->fbdev->pixo);
 196             resplen = 4;
 197             break;
 198         case 0x00044006: /* Test pixel order */
 199             resplen = 4;
 200             break;
 201         case 0x00048006: /* Set pixel order */
 202             pixo = ldl_phys(&s->dma_as, value + 12);
 203             newpixo = &pixo;
 204             resplen = 4;
 205             break;
 206         case 0x00040007: /* Get alpha */
 207             stl_phys(&s->dma_as, value + 12, s->fbdev->alpha);
 208             resplen = 4;
 209             break;
 210         case 0x00044007: /* Test pixel alpha */
 211             resplen = 4;
 212             break;
 213         case 0x00048007: /* Set alpha */
 214             alpha = ldl_phys(&s->dma_as, value + 12);
 215             newalpha = &alpha;
 216             resplen = 4;
 217             break;
 218         case 0x00040008: /* Get pitch */
 219             stl_phys(&s->dma_as, value + 12, s->fbdev->pitch);
 220             resplen = 4;
 221             break;
 222         case 0x00040009: /* Get virtual offset */
 223             stl_phys(&s->dma_as, value + 12, s->fbdev->xoffset);
 224             stl_phys(&s->dma_as, value + 16, s->fbdev->yoffset);
 225             resplen = 8;
 226             break;
 227         case 0x00044009: /* Test virtual offset */
 228             resplen = 8;
 229             break;
 230         case 0x00048009: /* Set virtual offset */
 231             xoffset = ldl_phys(&s->dma_as, value + 12);
 232             newxoffset = &xoffset;
 233             yoffset = ldl_phys(&s->dma_as, value + 16);
 234             newyoffset = &yoffset;
 235             /*
 236             stl_phys(&s->dma_as, value + 12, bcm2835_fb.xres);
 237             stl_phys(&s->dma_as, value + 16, bcm2835_fb.yres);
 238             */
 239             resplen = 8;
 240             break;
 241         case 0x0004000a: /* Get/Test/Set overscan */
 242         case 0x0004400a:
 243         case 0x0004800a:
 244             stl_phys(&s->dma_as, value + 12, 0);
 245             stl_phys(&s->dma_as, value + 16, 0);
 246             stl_phys(&s->dma_as, value + 20, 0);
 247             stl_phys(&s->dma_as, value + 24, 0);
 248             resplen = 16;
 249             break;
 250
 251         case 0x0004800b: /* Set palette */
 252             offset = ldl_phys(&s->dma_as, value + 12);
 253             length = ldl_phys(&s->dma_as, value + 16);
 254             n = 0;
 255             while (n < length - offset) {
 256                 color = ldl_phys(&s->dma_as, value + 20 + (n << 2));
 257                 stl_phys(&s->dma_as,
 258                          s->fbdev->vcram_base + ((offset + n) << 2), color);
 259                 n++;
 260             }
 261             stl_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_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_phys(&s->dma_as, value + 8, (1 << 31) | resplen);
 286         value += bufsize + 12;
 287     }
 288
 289     if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
 290         || newalpha) {
 291         bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
 292                                newyoffset, newbpp, newpixo, newalpha);
 293     }
 294
 295     /* Buffer response code */
 296     stl_phys(&s->dma_as, s->addr + 4, (1 << 31));
 297 }
 298
 299 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset,
 300     unsigned size)
 301 {
 302     Bcm2835PropertyState *s = (Bcm2835PropertyState *)opaque;
 303     uint32_t res = 0;
 304
 305     switch (offset) {
 306     case 0:
 307         res = MBOX_CHAN_PROPERTY | s->addr;
 308         s->pending = 0;
 309         qemu_set_irq(s->mbox_irq, 0);
 310         break;
 311     case 4:
 312         res = s->pending;
 313         break;
 314     default:
 315         qemu_log_mask(LOG_GUEST_ERROR,
 316             "bcm2835_property_read: Bad offset %x\n", (int)offset);
 317         return 0;
 318     }
 319     return res;
 320 }
 321
 322 static void bcm2835_property_write(void *opaque, hwaddr offset,
 323     uint64_t value, unsigned size)
 324 {
 325     Bcm2835PropertyState *s = (Bcm2835PropertyState *)opaque;
 326     switch (offset) {
 327     case 0:
 328         if (!s->pending) {
 329             s->pending = 1;
 330             bcm2835_property_mbox_push(s, value);
 331             qemu_set_irq(s->mbox_irq, 1);
 332         }
 333         break;
 334     default:
 335         qemu_log_mask(LOG_GUEST_ERROR,
 336             "bcm2835_property_write: Bad offset %x\n", (int)offset);
 337         return;
 338     }
 339
 340 }
 341
 342
 343 static const MemoryRegionOps bcm2835_property_ops = {
 344     .read = bcm2835_property_read,
 345     .write = bcm2835_property_write,
 346     .endianness = DEVICE_NATIVE_ENDIAN,
 347 };
 348
 349
 350 static const VMStateDescription vmstate_bcm2835_property = {
 351     .name = TYPE_BCM2835_PROPERTY,
 352     .version_id = 1,
 353     .minimum_version_id = 1,
 354     .minimum_version_id_old = 1,
 355     .fields      = (VMStateField[]) {
 356         VMSTATE_END_OF_LIST()
 357     }
 358 };
 359
 360 static void bcm2835_property_init(Object *obj)
 361 {
 362     Bcm2835PropertyState *s = BCM2835_PROPERTY(obj);
 363     memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s,
 364         TYPE_BCM2835_PROPERTY, 0x10);
 365 }
 366
 367 static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 368 {
 369     Bcm2835PropertyState *s = BCM2835_PROPERTY(dev);
 370     Object *obj;
 371     Error *err = NULL;
 372
 373     obj = object_property_get_link(OBJECT(dev), "bcm2835_fb", &err);
 374     if (err || obj == NULL) {
 375         error_setg(errp, "bcm2835_property: required bcm2835_fb link missing");
 376         return;
 377     }
 378
 379     s->fbdev = BCM2835_FB(obj);
 380
 381     obj = object_property_get_link(OBJECT(dev), "dma_mr", &err);
 382     if (err || obj == NULL) {
 383         error_setg(errp, "bcm2835_property: required dma_mr link not found");
 384         return;
 385     }
 386
 387     s->dma_mr = MEMORY_REGION(obj);
 388     address_space_init(&s->dma_as, s->dma_mr, NULL);
 389
 390     s->pending = 0;
 391
 392     sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->mbox_irq);
 393     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
 394 }
 395
 396 static void bcm2835_property_class_init(ObjectClass *klass, void *data)
 397 {
 398     DeviceClass *dc = DEVICE_CLASS(klass);
 399
 400     dc->realize = bcm2835_property_realize;
 401     dc->vmsd = &vmstate_bcm2835_property;
 402 }
 403
 404 static TypeInfo bcm2835_property_info = {
 405     .name          = TYPE_BCM2835_PROPERTY,
 406     .parent        = TYPE_SYS_BUS_DEVICE,
 407     .instance_size = sizeof(Bcm2835PropertyState),
 408     .class_init    = bcm2835_property_class_init,
 409     .instance_init = bcm2835_property_init,
 410 };
 411
 412 static void bcm2835_property_register_types(void)
 413 {
 414     type_register_static(&bcm2835_property_info);
 415 }
 416
 417 type_init(bcm2835_property_register_types)