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 case 0x00040013: /* Get number of displays */ 274 stl_le_phys(&s->dma_as, value + 12, 1); 275 resplen = 4; 276 break; 277 278 case 0x00060001: /* Get DMA channels */ 279 /* channels 2-5 */ 280 stl_le_phys(&s->dma_as, value + 12, 0x003C); 281 resplen = 4; 282 break; 283 284 case 0x00050001: /* Get command line */ 285 /* 286 * We follow the firmware behaviour: no NUL terminator is 287 * written to the buffer, and if the buffer is too short 288 * we report the required length in the response header 289 * and copy nothing to the buffer. 290 */ 291 resplen = strlen(s->command_line); 292 if (bufsize >= resplen) 293 address_space_write(&s->dma_as, value + 12, 294 MEMTXATTRS_UNSPECIFIED, s->command_line, 295 resplen); 296 break; 297 298 default: 299 qemu_log_mask(LOG_UNIMP, 300 "bcm2835_property: unhandled tag 0x%08x\n", tag); 301 break; 302 } 303 304 trace_bcm2835_mbox_property(tag, bufsize, resplen); 305 if (tag == 0) { 306 break; 307 } 308 309 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 310 value += bufsize + 12; 311 } 312 313 /* Reconfigure framebuffer if required */ 314 if (fbconfig_updated) { 315 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 316 } 317 318 /* Buffer response code */ 319 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 320 } 321 322 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 323 unsigned size) 324 { 325 BCM2835PropertyState *s = opaque; 326 uint32_t res = 0; 327 328 switch (offset) { 329 case MBOX_AS_DATA: 330 res = MBOX_CHAN_PROPERTY | s->addr; 331 s->pending = false; 332 qemu_set_irq(s->mbox_irq, 0); 333 break; 334 335 case MBOX_AS_PENDING: 336 res = s->pending; 337 break; 338 339 default: 340 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 341 __func__, offset); 342 return 0; 343 } 344 345 return res; 346 } 347 348 static void bcm2835_property_write(void *opaque, hwaddr offset, 349 uint64_t value, unsigned size) 350 { 351 BCM2835PropertyState *s = opaque; 352 353 switch (offset) { 354 case MBOX_AS_DATA: 355 /* bcm2835_mbox should check our pending status before pushing */ 356 assert(!s->pending); 357 s->pending = true; 358 bcm2835_property_mbox_push(s, value); 359 qemu_set_irq(s->mbox_irq, 1); 360 break; 361 362 default: 363 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 364 __func__, offset); 365 return; 366 } 367 } 368 369 static const MemoryRegionOps bcm2835_property_ops = { 370 .read = bcm2835_property_read, 371 .write = bcm2835_property_write, 372 .endianness = DEVICE_NATIVE_ENDIAN, 373 .valid.min_access_size = 4, 374 .valid.max_access_size = 4, 375 }; 376 377 static const VMStateDescription vmstate_bcm2835_property = { 378 .name = TYPE_BCM2835_PROPERTY, 379 .version_id = 1, 380 .minimum_version_id = 1, 381 .fields = (VMStateField[]) { 382 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 383 VMSTATE_UINT32(addr, BCM2835PropertyState), 384 VMSTATE_BOOL(pending, BCM2835PropertyState), 385 VMSTATE_END_OF_LIST() 386 } 387 }; 388 389 static void bcm2835_property_init(Object *obj) 390 { 391 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 392 393 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 394 TYPE_BCM2835_PROPERTY, 0x10); 395 396 /* 397 * bcm2835_property_ops call into bcm2835_mbox, which in-turn reads from 398 * iomem. As such, mark iomem as re-entracy safe. 399 */ 400 s->iomem.disable_reentrancy_guard = true; 401 402 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 403 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 404 } 405 406 static void bcm2835_property_reset(DeviceState *dev) 407 { 408 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 409 410 s->pending = false; 411 } 412 413 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 414 { 415 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 416 Object *obj; 417 418 obj = object_property_get_link(OBJECT(dev), "fb", &error_abort); 419 s->fbdev = BCM2835_FB(obj); 420 421 obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort); 422 s->dma_mr = MEMORY_REGION(obj); 423 address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory"); 424 425 /* TODO: connect to MAC address of USB NIC device, once we emulate it */ 426 qemu_macaddr_default_if_unset(&s->macaddr); 427 428 bcm2835_property_reset(dev); 429 } 430 431 static Property bcm2835_property_props[] = { 432 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), 433 DEFINE_PROP_STRING("command-line", BCM2835PropertyState, command_line), 434 DEFINE_PROP_END_OF_LIST() 435 }; 436 437 static void bcm2835_property_class_init(ObjectClass *klass, void *data) 438 { 439 DeviceClass *dc = DEVICE_CLASS(klass); 440 441 device_class_set_props(dc, bcm2835_property_props); 442 dc->realize = bcm2835_property_realize; 443 dc->vmsd = &vmstate_bcm2835_property; 444 } 445 446 static const TypeInfo bcm2835_property_info = { 447 .name = TYPE_BCM2835_PROPERTY, 448 .parent = TYPE_SYS_BUS_DEVICE, 449 .instance_size = sizeof(BCM2835PropertyState), 450 .class_init = bcm2835_property_class_init, 451 .instance_init = bcm2835_property_init, 452 }; 453 454 static void bcm2835_property_register_types(void) 455 { 456 type_register_static(&bcm2835_property_info); 457 } 458 459 type_init(bcm2835_property_register_types) 460