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/qdev-properties.h" 10 #include "migration/vmstate.h" 11 #include "hw/irq.h" 12 #include "hw/misc/bcm2835_mbox_defs.h" 13 #include "sysemu/dma.h" 14 #include "qemu/log.h" 15 #include "qemu/module.h" 16 #include "trace.h" 17 18 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */ 19 20 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) 21 { 22 uint32_t tag; 23 uint32_t bufsize; 24 uint32_t tot_len; 25 size_t resplen; 26 uint32_t tmp; 27 int n; 28 uint32_t offset, length, color; 29 30 /* 31 * Copy the current state of the framebuffer config; we will update 32 * this copy as we process tags and then ask the framebuffer to use 33 * it at the end. 34 */ 35 BCM2835FBConfig fbconfig = s->fbdev->config; 36 bool fbconfig_updated = false; 37 38 value &= ~0xf; 39 40 s->addr = value; 41 42 tot_len = ldl_le_phys(&s->dma_as, value); 43 44 /* @(addr + 4) : Buffer response code */ 45 value = s->addr + 8; 46 while (value + 8 <= s->addr + tot_len) { 47 tag = ldl_le_phys(&s->dma_as, value); 48 bufsize = ldl_le_phys(&s->dma_as, value + 4); 49 /* @(value + 8) : Request/response indicator */ 50 resplen = 0; 51 switch (tag) { 52 case 0x00000000: /* End tag */ 53 break; 54 case 0x00000001: /* Get firmware revision */ 55 stl_le_phys(&s->dma_as, value + 12, 346337); 56 resplen = 4; 57 break; 58 case 0x00010001: /* Get board model */ 59 qemu_log_mask(LOG_UNIMP, 60 "bcm2835_property: 0x%08x get board model NYI\n", 61 tag); 62 resplen = 4; 63 break; 64 case 0x00010002: /* Get board revision */ 65 stl_le_phys(&s->dma_as, value + 12, s->board_rev); 66 resplen = 4; 67 break; 68 case 0x00010003: /* Get board MAC address */ 69 resplen = sizeof(s->macaddr.a); 70 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen); 71 break; 72 case 0x00010004: /* Get board serial */ 73 qemu_log_mask(LOG_UNIMP, 74 "bcm2835_property: 0x%08x get board serial NYI\n", 75 tag); 76 resplen = 8; 77 break; 78 case 0x00010005: /* Get ARM memory */ 79 /* base */ 80 stl_le_phys(&s->dma_as, value + 12, 0); 81 /* size */ 82 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); 83 resplen = 8; 84 break; 85 case 0x00010006: /* Get VC memory */ 86 /* base */ 87 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); 88 /* size */ 89 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); 90 resplen = 8; 91 break; 92 case 0x00028001: /* Set power state */ 93 /* Assume that whatever device they asked for exists, 94 * and we'll just claim we set it to the desired state 95 */ 96 tmp = ldl_le_phys(&s->dma_as, value + 16); 97 stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); 98 resplen = 8; 99 break; 100 101 /* Clocks */ 102 103 case 0x00030001: /* Get clock state */ 104 stl_le_phys(&s->dma_as, value + 16, 0x1); 105 resplen = 8; 106 break; 107 108 case 0x00038001: /* Set clock state */ 109 qemu_log_mask(LOG_UNIMP, 110 "bcm2835_property: 0x%08x set clock state NYI\n", 111 tag); 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_le_phys(&s->dma_as, value + 12)) { 119 case 1: /* EMMC */ 120 stl_le_phys(&s->dma_as, value + 16, 50000000); 121 break; 122 case 2: /* UART */ 123 stl_le_phys(&s->dma_as, value + 16, 3000000); 124 break; 125 default: 126 stl_le_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 qemu_log_mask(LOG_UNIMP, 136 "bcm2835_property: 0x%08x set clock rate NYI\n", 137 tag); 138 resplen = 8; 139 break; 140 141 /* Temperature */ 142 143 case 0x00030006: /* Get temperature */ 144 stl_le_phys(&s->dma_as, value + 16, 25000); 145 resplen = 8; 146 break; 147 148 case 0x0003000A: /* Get max temperature */ 149 stl_le_phys(&s->dma_as, value + 16, 99000); 150 resplen = 8; 151 break; 152 153 /* Frame buffer */ 154 155 case 0x00040001: /* Allocate buffer */ 156 stl_le_phys(&s->dma_as, value + 12, fbconfig.base); 157 stl_le_phys(&s->dma_as, value + 16, 158 bcm2835_fb_get_size(&fbconfig)); 159 resplen = 8; 160 break; 161 case 0x00048001: /* Release buffer */ 162 resplen = 0; 163 break; 164 case 0x00040002: /* Blank screen */ 165 resplen = 4; 166 break; 167 case 0x00044003: /* Test physical display width/height */ 168 case 0x00044004: /* Test virtual display width/height */ 169 resplen = 8; 170 break; 171 case 0x00048003: /* Set physical display width/height */ 172 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); 173 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); 174 bcm2835_fb_validate_config(&fbconfig); 175 fbconfig_updated = true; 176 /* fall through */ 177 case 0x00040003: /* Get physical display width/height */ 178 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); 179 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); 180 resplen = 8; 181 break; 182 case 0x00048004: /* Set virtual display width/height */ 183 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); 184 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); 185 bcm2835_fb_validate_config(&fbconfig); 186 fbconfig_updated = true; 187 /* fall through */ 188 case 0x00040004: /* Get virtual display width/height */ 189 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); 190 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); 191 resplen = 8; 192 break; 193 case 0x00044005: /* Test depth */ 194 resplen = 4; 195 break; 196 case 0x00048005: /* Set depth */ 197 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); 198 bcm2835_fb_validate_config(&fbconfig); 199 fbconfig_updated = true; 200 /* fall through */ 201 case 0x00040005: /* Get depth */ 202 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); 203 resplen = 4; 204 break; 205 case 0x00044006: /* Test pixel order */ 206 resplen = 4; 207 break; 208 case 0x00048006: /* Set pixel order */ 209 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); 210 bcm2835_fb_validate_config(&fbconfig); 211 fbconfig_updated = true; 212 /* fall through */ 213 case 0x00040006: /* Get pixel order */ 214 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); 215 resplen = 4; 216 break; 217 case 0x00044007: /* Test pixel alpha */ 218 resplen = 4; 219 break; 220 case 0x00048007: /* Set alpha */ 221 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); 222 bcm2835_fb_validate_config(&fbconfig); 223 fbconfig_updated = true; 224 /* fall through */ 225 case 0x00040007: /* Get alpha */ 226 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); 227 resplen = 4; 228 break; 229 case 0x00040008: /* Get pitch */ 230 stl_le_phys(&s->dma_as, value + 12, 231 bcm2835_fb_get_pitch(&fbconfig)); 232 resplen = 4; 233 break; 234 case 0x00044009: /* Test virtual offset */ 235 resplen = 8; 236 break; 237 case 0x00048009: /* Set virtual offset */ 238 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); 239 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); 240 bcm2835_fb_validate_config(&fbconfig); 241 fbconfig_updated = true; 242 /* fall through */ 243 case 0x00040009: /* Get virtual offset */ 244 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); 245 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); 246 resplen = 8; 247 break; 248 case 0x0004000a: /* Get/Test/Set overscan */ 249 case 0x0004400a: 250 case 0x0004800a: 251 stl_le_phys(&s->dma_as, value + 12, 0); 252 stl_le_phys(&s->dma_as, value + 16, 0); 253 stl_le_phys(&s->dma_as, value + 20, 0); 254 stl_le_phys(&s->dma_as, value + 24, 0); 255 resplen = 16; 256 break; 257 case 0x0004800b: /* Set palette */ 258 offset = ldl_le_phys(&s->dma_as, value + 12); 259 length = ldl_le_phys(&s->dma_as, value + 16); 260 n = 0; 261 while (n < length - offset) { 262 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 263 stl_le_phys(&s->dma_as, 264 s->fbdev->vcram_base + ((offset + n) << 2), color); 265 n++; 266 } 267 stl_le_phys(&s->dma_as, value + 12, 0); 268 resplen = 4; 269 break; 270 271 case 0x00060001: /* Get DMA channels */ 272 /* channels 2-5 */ 273 stl_le_phys(&s->dma_as, value + 12, 0x003C); 274 resplen = 4; 275 break; 276 277 case 0x00050001: /* Get command line */ 278 resplen = 0; 279 break; 280 281 default: 282 qemu_log_mask(LOG_UNIMP, 283 "bcm2835_property: unhandled tag 0x%08x\n", tag); 284 break; 285 } 286 287 trace_bcm2835_mbox_property(tag, bufsize, resplen); 288 if (tag == 0) { 289 break; 290 } 291 292 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 293 value += bufsize + 12; 294 } 295 296 /* Reconfigure framebuffer if required */ 297 if (fbconfig_updated) { 298 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 299 } 300 301 /* Buffer response code */ 302 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 303 } 304 305 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 306 unsigned size) 307 { 308 BCM2835PropertyState *s = opaque; 309 uint32_t res = 0; 310 311 switch (offset) { 312 case MBOX_AS_DATA: 313 res = MBOX_CHAN_PROPERTY | s->addr; 314 s->pending = false; 315 qemu_set_irq(s->mbox_irq, 0); 316 break; 317 318 case MBOX_AS_PENDING: 319 res = s->pending; 320 break; 321 322 default: 323 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 324 __func__, offset); 325 return 0; 326 } 327 328 return res; 329 } 330 331 static void bcm2835_property_write(void *opaque, hwaddr offset, 332 uint64_t value, unsigned size) 333 { 334 BCM2835PropertyState *s = opaque; 335 336 switch (offset) { 337 case MBOX_AS_DATA: 338 /* bcm2835_mbox should check our pending status before pushing */ 339 assert(!s->pending); 340 s->pending = true; 341 bcm2835_property_mbox_push(s, value); 342 qemu_set_irq(s->mbox_irq, 1); 343 break; 344 345 default: 346 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 347 __func__, offset); 348 return; 349 } 350 } 351 352 static const MemoryRegionOps bcm2835_property_ops = { 353 .read = bcm2835_property_read, 354 .write = bcm2835_property_write, 355 .endianness = DEVICE_NATIVE_ENDIAN, 356 .valid.min_access_size = 4, 357 .valid.max_access_size = 4, 358 }; 359 360 static const VMStateDescription vmstate_bcm2835_property = { 361 .name = TYPE_BCM2835_PROPERTY, 362 .version_id = 1, 363 .minimum_version_id = 1, 364 .fields = (VMStateField[]) { 365 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 366 VMSTATE_UINT32(addr, BCM2835PropertyState), 367 VMSTATE_BOOL(pending, BCM2835PropertyState), 368 VMSTATE_END_OF_LIST() 369 } 370 }; 371 372 static void bcm2835_property_init(Object *obj) 373 { 374 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 375 376 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 377 TYPE_BCM2835_PROPERTY, 0x10); 378 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 379 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 380 } 381 382 static void bcm2835_property_reset(DeviceState *dev) 383 { 384 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 385 386 s->pending = false; 387 } 388 389 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 390 { 391 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 392 Object *obj; 393 Error *err = NULL; 394 395 obj = object_property_get_link(OBJECT(dev), "fb", &err); 396 if (obj == NULL) { 397 error_setg(errp, "%s: required fb link not found: %s", 398 __func__, error_get_pretty(err)); 399 return; 400 } 401 402 s->fbdev = BCM2835_FB(obj); 403 404 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); 405 if (obj == NULL) { 406 error_setg(errp, "%s: required dma-mr link not found: %s", 407 __func__, error_get_pretty(err)); 408 return; 409 } 410 411 s->dma_mr = MEMORY_REGION(obj); 412 address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory"); 413 414 /* TODO: connect to MAC address of USB NIC device, once we emulate it */ 415 qemu_macaddr_default_if_unset(&s->macaddr); 416 417 bcm2835_property_reset(dev); 418 } 419 420 static Property bcm2835_property_props[] = { 421 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), 422 DEFINE_PROP_END_OF_LIST() 423 }; 424 425 static void bcm2835_property_class_init(ObjectClass *klass, void *data) 426 { 427 DeviceClass *dc = DEVICE_CLASS(klass); 428 429 device_class_set_props(dc, bcm2835_property_props); 430 dc->realize = bcm2835_property_realize; 431 dc->vmsd = &vmstate_bcm2835_property; 432 } 433 434 static TypeInfo bcm2835_property_info = { 435 .name = TYPE_BCM2835_PROPERTY, 436 .parent = TYPE_SYS_BUS_DEVICE, 437 .instance_size = sizeof(BCM2835PropertyState), 438 .class_init = bcm2835_property_class_init, 439 .instance_init = bcm2835_property_init, 440 }; 441 442 static void bcm2835_property_register_types(void) 443 { 444 type_register_static(&bcm2835_property_info); 445 } 446 447 type_init(bcm2835_property_register_types) 448