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->base); 145 tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres; 146 tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres; 147 tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->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->xres; 161 tmp_yres = newyres != NULL ? *newyres : s->fbdev->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->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->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->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 = α 215 resplen = 4; 216 break; 217 case 0x00040008: /* Get pitch */ 218 tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres; 219 tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->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 ? *newxoffset : s->fbdev->xoffset; 225 tmp_yoffset = newyoffset != NULL ? *newyoffset : s->fbdev->yoffset; 226 stl_le_phys(&s->dma_as, value + 12, tmp_xoffset); 227 stl_le_phys(&s->dma_as, value + 16, tmp_yoffset); 228 resplen = 8; 229 break; 230 case 0x00044009: /* Test virtual offset */ 231 resplen = 8; 232 break; 233 case 0x00048009: /* Set virtual offset */ 234 xoffset = ldl_le_phys(&s->dma_as, value + 12); 235 newxoffset = &xoffset; 236 yoffset = ldl_le_phys(&s->dma_as, value + 16); 237 newyoffset = &yoffset; 238 resplen = 8; 239 break; 240 case 0x0004000a: /* Get/Test/Set overscan */ 241 case 0x0004400a: 242 case 0x0004800a: 243 stl_le_phys(&s->dma_as, value + 12, 0); 244 stl_le_phys(&s->dma_as, value + 16, 0); 245 stl_le_phys(&s->dma_as, value + 20, 0); 246 stl_le_phys(&s->dma_as, value + 24, 0); 247 resplen = 16; 248 break; 249 case 0x0004800b: /* Set palette */ 250 offset = ldl_le_phys(&s->dma_as, value + 12); 251 length = ldl_le_phys(&s->dma_as, value + 16); 252 n = 0; 253 while (n < length - offset) { 254 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 255 stl_le_phys(&s->dma_as, 256 s->fbdev->vcram_base + ((offset + n) << 2), color); 257 n++; 258 } 259 stl_le_phys(&s->dma_as, value + 12, 0); 260 resplen = 4; 261 break; 262 263 case 0x00060001: /* Get DMA channels */ 264 /* channels 2-5 */ 265 stl_le_phys(&s->dma_as, value + 12, 0x003C); 266 resplen = 4; 267 break; 268 269 case 0x00050001: /* Get command line */ 270 resplen = 0; 271 break; 272 273 default: 274 qemu_log_mask(LOG_GUEST_ERROR, 275 "bcm2835_property: unhandled tag %08x\n", tag); 276 break; 277 } 278 279 if (tag == 0) { 280 break; 281 } 282 283 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 284 value += bufsize + 12; 285 } 286 287 /* Reconfigure framebuffer if required */ 288 if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo 289 || newalpha) { 290 bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset, 291 newyoffset, newbpp, newpixo, newalpha); 292 } 293 294 /* Buffer response code */ 295 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 296 } 297 298 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 299 unsigned size) 300 { 301 BCM2835PropertyState *s = opaque; 302 uint32_t res = 0; 303 304 switch (offset) { 305 case MBOX_AS_DATA: 306 res = MBOX_CHAN_PROPERTY | s->addr; 307 s->pending = false; 308 qemu_set_irq(s->mbox_irq, 0); 309 break; 310 311 case MBOX_AS_PENDING: 312 res = s->pending; 313 break; 314 315 default: 316 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 317 __func__, offset); 318 return 0; 319 } 320 321 return res; 322 } 323 324 static void bcm2835_property_write(void *opaque, hwaddr offset, 325 uint64_t value, unsigned size) 326 { 327 BCM2835PropertyState *s = opaque; 328 329 switch (offset) { 330 case MBOX_AS_DATA: 331 /* bcm2835_mbox should check our pending status before pushing */ 332 assert(!s->pending); 333 s->pending = true; 334 bcm2835_property_mbox_push(s, value); 335 qemu_set_irq(s->mbox_irq, 1); 336 break; 337 338 default: 339 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 340 __func__, offset); 341 return; 342 } 343 } 344 345 static const MemoryRegionOps bcm2835_property_ops = { 346 .read = bcm2835_property_read, 347 .write = bcm2835_property_write, 348 .endianness = DEVICE_NATIVE_ENDIAN, 349 .valid.min_access_size = 4, 350 .valid.max_access_size = 4, 351 }; 352 353 static const VMStateDescription vmstate_bcm2835_property = { 354 .name = TYPE_BCM2835_PROPERTY, 355 .version_id = 1, 356 .minimum_version_id = 1, 357 .fields = (VMStateField[]) { 358 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 359 VMSTATE_UINT32(addr, BCM2835PropertyState), 360 VMSTATE_BOOL(pending, BCM2835PropertyState), 361 VMSTATE_END_OF_LIST() 362 } 363 }; 364 365 static void bcm2835_property_init(Object *obj) 366 { 367 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 368 369 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 370 TYPE_BCM2835_PROPERTY, 0x10); 371 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 372 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 373 } 374 375 static void bcm2835_property_reset(DeviceState *dev) 376 { 377 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 378 379 s->pending = false; 380 } 381 382 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 383 { 384 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 385 Object *obj; 386 Error *err = NULL; 387 388 obj = object_property_get_link(OBJECT(dev), "fb", &err); 389 if (obj == NULL) { 390 error_setg(errp, "%s: required fb link not found: %s", 391 __func__, error_get_pretty(err)); 392 return; 393 } 394 395 s->fbdev = BCM2835_FB(obj); 396 397 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); 398 if (obj == NULL) { 399 error_setg(errp, "%s: required dma-mr link not found: %s", 400 __func__, error_get_pretty(err)); 401 return; 402 } 403 404 s->dma_mr = MEMORY_REGION(obj); 405 address_space_init(&s->dma_as, s->dma_mr, NULL); 406 407 /* TODO: connect to MAC address of USB NIC device, once we emulate it */ 408 qemu_macaddr_default_if_unset(&s->macaddr); 409 410 bcm2835_property_reset(dev); 411 } 412 413 static Property bcm2835_property_props[] = { 414 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), 415 DEFINE_PROP_END_OF_LIST() 416 }; 417 418 static void bcm2835_property_class_init(ObjectClass *klass, void *data) 419 { 420 DeviceClass *dc = DEVICE_CLASS(klass); 421 422 dc->props = bcm2835_property_props; 423 dc->realize = bcm2835_property_realize; 424 dc->vmsd = &vmstate_bcm2835_property; 425 } 426 427 static TypeInfo bcm2835_property_info = { 428 .name = TYPE_BCM2835_PROPERTY, 429 .parent = TYPE_SYS_BUS_DEVICE, 430 .instance_size = sizeof(BCM2835PropertyState), 431 .class_init = bcm2835_property_class_init, 432 .instance_init = bcm2835_property_init, 433 }; 434 435 static void bcm2835_property_register_types(void) 436 { 437 type_register_static(&bcm2835_property_info); 438 } 439 440 type_init(bcm2835_property_register_types) 441