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 25 /* 26 * Copy the current state of the framebuffer config; we will update 27 * this copy as we process tags and then ask the framebuffer to use 28 * it at the end. 29 */ 30 BCM2835FBConfig fbconfig = s->fbdev->config; 31 bool fbconfig_updated = false; 32 33 value &= ~0xf; 34 35 s->addr = value; 36 37 tot_len = ldl_le_phys(&s->dma_as, value); 38 39 /* @(addr + 4) : Buffer response code */ 40 value = s->addr + 8; 41 while (value + 8 <= s->addr + tot_len) { 42 tag = ldl_le_phys(&s->dma_as, value); 43 bufsize = ldl_le_phys(&s->dma_as, value + 4); 44 /* @(value + 8) : Request/response indicator */ 45 resplen = 0; 46 switch (tag) { 47 case 0x00000000: /* End tag */ 48 break; 49 case 0x00000001: /* Get firmware revision */ 50 stl_le_phys(&s->dma_as, value + 12, 346337); 51 resplen = 4; 52 break; 53 case 0x00010001: /* Get board model */ 54 qemu_log_mask(LOG_UNIMP, 55 "bcm2835_property: %x get board model NYI\n", tag); 56 resplen = 4; 57 break; 58 case 0x00010002: /* Get board revision */ 59 stl_le_phys(&s->dma_as, value + 12, s->board_rev); 60 resplen = 4; 61 break; 62 case 0x00010003: /* Get board MAC address */ 63 resplen = sizeof(s->macaddr.a); 64 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen); 65 break; 66 case 0x00010004: /* Get board serial */ 67 qemu_log_mask(LOG_UNIMP, 68 "bcm2835_property: %x get board serial NYI\n", tag); 69 resplen = 8; 70 break; 71 case 0x00010005: /* Get ARM memory */ 72 /* base */ 73 stl_le_phys(&s->dma_as, value + 12, 0); 74 /* size */ 75 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); 76 resplen = 8; 77 break; 78 case 0x00010006: /* Get VC memory */ 79 /* base */ 80 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); 81 /* size */ 82 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); 83 resplen = 8; 84 break; 85 case 0x00028001: /* Set power state */ 86 /* Assume that whatever device they asked for exists, 87 * and we'll just claim we set it to the desired state 88 */ 89 tmp = ldl_le_phys(&s->dma_as, value + 16); 90 stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); 91 resplen = 8; 92 break; 93 94 /* Clocks */ 95 96 case 0x00030001: /* Get clock state */ 97 stl_le_phys(&s->dma_as, value + 16, 0x1); 98 resplen = 8; 99 break; 100 101 case 0x00038001: /* Set clock state */ 102 qemu_log_mask(LOG_UNIMP, 103 "bcm2835_property: %x set clock state NYI\n", tag); 104 resplen = 8; 105 break; 106 107 case 0x00030002: /* Get clock rate */ 108 case 0x00030004: /* Get max clock rate */ 109 case 0x00030007: /* Get min clock rate */ 110 switch (ldl_le_phys(&s->dma_as, value + 12)) { 111 case 1: /* EMMC */ 112 stl_le_phys(&s->dma_as, value + 16, 50000000); 113 break; 114 case 2: /* UART */ 115 stl_le_phys(&s->dma_as, value + 16, 3000000); 116 break; 117 default: 118 stl_le_phys(&s->dma_as, value + 16, 700000000); 119 break; 120 } 121 resplen = 8; 122 break; 123 124 case 0x00038002: /* Set clock rate */ 125 case 0x00038004: /* Set max clock rate */ 126 case 0x00038007: /* Set min clock rate */ 127 qemu_log_mask(LOG_UNIMP, 128 "bcm2835_property: %x set clock rates NYI\n", tag); 129 resplen = 8; 130 break; 131 132 /* Temperature */ 133 134 case 0x00030006: /* Get temperature */ 135 stl_le_phys(&s->dma_as, value + 16, 25000); 136 resplen = 8; 137 break; 138 139 case 0x0003000A: /* Get max temperature */ 140 stl_le_phys(&s->dma_as, value + 16, 99000); 141 resplen = 8; 142 break; 143 144 /* Frame buffer */ 145 146 case 0x00040001: /* Allocate buffer */ 147 stl_le_phys(&s->dma_as, value + 12, fbconfig.base); 148 stl_le_phys(&s->dma_as, value + 16, 149 bcm2835_fb_get_size(&fbconfig)); 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 0x00044003: /* Test physical display width/height */ 159 case 0x00044004: /* Test virtual display width/height */ 160 resplen = 8; 161 break; 162 case 0x00048003: /* Set physical display width/height */ 163 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); 164 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); 165 bcm2835_fb_validate_config(&fbconfig); 166 fbconfig_updated = true; 167 /* fall through */ 168 case 0x00040003: /* Get physical display width/height */ 169 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); 170 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); 171 resplen = 8; 172 break; 173 case 0x00048004: /* Set virtual display width/height */ 174 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); 175 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); 176 bcm2835_fb_validate_config(&fbconfig); 177 fbconfig_updated = true; 178 /* fall through */ 179 case 0x00040004: /* Get virtual display width/height */ 180 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); 181 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); 182 resplen = 8; 183 break; 184 case 0x00044005: /* Test depth */ 185 resplen = 4; 186 break; 187 case 0x00048005: /* Set depth */ 188 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); 189 bcm2835_fb_validate_config(&fbconfig); 190 fbconfig_updated = true; 191 /* fall through */ 192 case 0x00040005: /* Get depth */ 193 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); 194 resplen = 4; 195 break; 196 case 0x00044006: /* Test pixel order */ 197 resplen = 4; 198 break; 199 case 0x00048006: /* Set pixel order */ 200 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); 201 bcm2835_fb_validate_config(&fbconfig); 202 fbconfig_updated = true; 203 /* fall through */ 204 case 0x00040006: /* Get pixel order */ 205 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); 206 resplen = 4; 207 break; 208 case 0x00044007: /* Test pixel alpha */ 209 resplen = 4; 210 break; 211 case 0x00048007: /* Set alpha */ 212 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); 213 bcm2835_fb_validate_config(&fbconfig); 214 fbconfig_updated = true; 215 /* fall through */ 216 case 0x00040007: /* Get alpha */ 217 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); 218 resplen = 4; 219 break; 220 case 0x00040008: /* Get pitch */ 221 stl_le_phys(&s->dma_as, value + 12, 222 bcm2835_fb_get_pitch(&fbconfig)); 223 resplen = 4; 224 break; 225 case 0x00044009: /* Test virtual offset */ 226 resplen = 8; 227 break; 228 case 0x00048009: /* Set virtual offset */ 229 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); 230 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); 231 bcm2835_fb_validate_config(&fbconfig); 232 fbconfig_updated = true; 233 /* fall through */ 234 case 0x00040009: /* Get virtual offset */ 235 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); 236 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); 237 resplen = 8; 238 break; 239 case 0x0004000a: /* Get/Test/Set overscan */ 240 case 0x0004400a: 241 case 0x0004800a: 242 stl_le_phys(&s->dma_as, value + 12, 0); 243 stl_le_phys(&s->dma_as, value + 16, 0); 244 stl_le_phys(&s->dma_as, value + 20, 0); 245 stl_le_phys(&s->dma_as, value + 24, 0); 246 resplen = 16; 247 break; 248 case 0x0004800b: /* Set palette */ 249 offset = ldl_le_phys(&s->dma_as, value + 12); 250 length = ldl_le_phys(&s->dma_as, value + 16); 251 n = 0; 252 while (n < length - offset) { 253 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 254 stl_le_phys(&s->dma_as, 255 s->fbdev->vcram_base + ((offset + n) << 2), color); 256 n++; 257 } 258 stl_le_phys(&s->dma_as, value + 12, 0); 259 resplen = 4; 260 break; 261 262 case 0x00060001: /* Get DMA channels */ 263 /* channels 2-5 */ 264 stl_le_phys(&s->dma_as, value + 12, 0x003C); 265 resplen = 4; 266 break; 267 268 case 0x00050001: /* Get command line */ 269 resplen = 0; 270 break; 271 272 default: 273 qemu_log_mask(LOG_GUEST_ERROR, 274 "bcm2835_property: unhandled tag %08x\n", tag); 275 break; 276 } 277 278 if (tag == 0) { 279 break; 280 } 281 282 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 283 value += bufsize + 12; 284 } 285 286 /* Reconfigure framebuffer if required */ 287 if (fbconfig_updated) { 288 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 289 } 290 291 /* Buffer response code */ 292 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 293 } 294 295 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 296 unsigned size) 297 { 298 BCM2835PropertyState *s = opaque; 299 uint32_t res = 0; 300 301 switch (offset) { 302 case MBOX_AS_DATA: 303 res = MBOX_CHAN_PROPERTY | s->addr; 304 s->pending = false; 305 qemu_set_irq(s->mbox_irq, 0); 306 break; 307 308 case MBOX_AS_PENDING: 309 res = s->pending; 310 break; 311 312 default: 313 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 314 __func__, offset); 315 return 0; 316 } 317 318 return res; 319 } 320 321 static void bcm2835_property_write(void *opaque, hwaddr offset, 322 uint64_t value, unsigned size) 323 { 324 BCM2835PropertyState *s = opaque; 325 326 switch (offset) { 327 case MBOX_AS_DATA: 328 /* bcm2835_mbox should check our pending status before pushing */ 329 assert(!s->pending); 330 s->pending = true; 331 bcm2835_property_mbox_push(s, value); 332 qemu_set_irq(s->mbox_irq, 1); 333 break; 334 335 default: 336 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 337 __func__, offset); 338 return; 339 } 340 } 341 342 static const MemoryRegionOps bcm2835_property_ops = { 343 .read = bcm2835_property_read, 344 .write = bcm2835_property_write, 345 .endianness = DEVICE_NATIVE_ENDIAN, 346 .valid.min_access_size = 4, 347 .valid.max_access_size = 4, 348 }; 349 350 static const VMStateDescription vmstate_bcm2835_property = { 351 .name = TYPE_BCM2835_PROPERTY, 352 .version_id = 1, 353 .minimum_version_id = 1, 354 .fields = (VMStateField[]) { 355 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 356 VMSTATE_UINT32(addr, BCM2835PropertyState), 357 VMSTATE_BOOL(pending, BCM2835PropertyState), 358 VMSTATE_END_OF_LIST() 359 } 360 }; 361 362 static void bcm2835_property_init(Object *obj) 363 { 364 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 365 366 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 367 TYPE_BCM2835_PROPERTY, 0x10); 368 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 369 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 370 } 371 372 static void bcm2835_property_reset(DeviceState *dev) 373 { 374 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 375 376 s->pending = false; 377 } 378 379 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 380 { 381 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 382 Object *obj; 383 Error *err = NULL; 384 385 obj = object_property_get_link(OBJECT(dev), "fb", &err); 386 if (obj == NULL) { 387 error_setg(errp, "%s: required fb link not found: %s", 388 __func__, error_get_pretty(err)); 389 return; 390 } 391 392 s->fbdev = BCM2835_FB(obj); 393 394 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); 395 if (obj == NULL) { 396 error_setg(errp, "%s: required dma-mr link not found: %s", 397 __func__, error_get_pretty(err)); 398 return; 399 } 400 401 s->dma_mr = MEMORY_REGION(obj); 402 address_space_init(&s->dma_as, s->dma_mr, NULL); 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 dc->props = bcm2835_property_props; 420 dc->realize = bcm2835_property_realize; 421 dc->vmsd = &vmstate_bcm2835_property; 422 } 423 424 static 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) 438