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 break; 74 case 0x00010004: /* Get board serial */ 75 qemu_log_mask(LOG_UNIMP, 76 "bcm2835_property: 0x%08x get board serial NYI\n", 77 tag); 78 resplen = 8; 79 break; 80 case 0x00010005: /* Get ARM memory */ 81 /* base */ 82 stl_le_phys(&s->dma_as, value + 12, 0); 83 /* size */ 84 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); 85 resplen = 8; 86 break; 87 case 0x00010006: /* Get VC memory */ 88 /* base */ 89 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); 90 /* size */ 91 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); 92 resplen = 8; 93 break; 94 case 0x00028001: /* Set power state */ 95 /* Assume that whatever device they asked for exists, 96 * and we'll just claim we set it to the desired state 97 */ 98 tmp = ldl_le_phys(&s->dma_as, value + 16); 99 stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); 100 resplen = 8; 101 break; 102 103 /* Clocks */ 104 105 case 0x00030001: /* Get clock state */ 106 stl_le_phys(&s->dma_as, value + 16, 0x1); 107 resplen = 8; 108 break; 109 110 case 0x00038001: /* Set clock state */ 111 qemu_log_mask(LOG_UNIMP, 112 "bcm2835_property: 0x%08x set clock state NYI\n", 113 tag); 114 resplen = 8; 115 break; 116 117 case 0x00030002: /* Get clock rate */ 118 case 0x00030004: /* Get max clock rate */ 119 case 0x00030007: /* Get min clock rate */ 120 switch (ldl_le_phys(&s->dma_as, value + 12)) { 121 case 1: /* EMMC */ 122 stl_le_phys(&s->dma_as, value + 16, 50000000); 123 break; 124 case 2: /* UART */ 125 stl_le_phys(&s->dma_as, value + 16, 3000000); 126 break; 127 default: 128 stl_le_phys(&s->dma_as, value + 16, 700000000); 129 break; 130 } 131 resplen = 8; 132 break; 133 134 case 0x00038002: /* Set clock rate */ 135 case 0x00038004: /* Set max clock rate */ 136 case 0x00038007: /* Set min clock rate */ 137 qemu_log_mask(LOG_UNIMP, 138 "bcm2835_property: 0x%08x set clock rate NYI\n", 139 tag); 140 resplen = 8; 141 break; 142 143 /* Temperature */ 144 145 case 0x00030006: /* Get temperature */ 146 stl_le_phys(&s->dma_as, value + 16, 25000); 147 resplen = 8; 148 break; 149 150 case 0x0003000A: /* Get max temperature */ 151 stl_le_phys(&s->dma_as, value + 16, 99000); 152 resplen = 8; 153 break; 154 155 /* Frame buffer */ 156 157 case 0x00040001: /* Allocate buffer */ 158 stl_le_phys(&s->dma_as, value + 12, fbconfig.base); 159 stl_le_phys(&s->dma_as, value + 16, 160 bcm2835_fb_get_size(&fbconfig)); 161 resplen = 8; 162 break; 163 case 0x00048001: /* Release buffer */ 164 resplen = 0; 165 break; 166 case 0x00040002: /* Blank screen */ 167 resplen = 4; 168 break; 169 case 0x00044003: /* Test physical display width/height */ 170 case 0x00044004: /* Test virtual display width/height */ 171 resplen = 8; 172 break; 173 case 0x00048003: /* Set physical display width/height */ 174 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); 175 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); 176 bcm2835_fb_validate_config(&fbconfig); 177 fbconfig_updated = true; 178 /* fall through */ 179 case 0x00040003: /* Get physical display width/height */ 180 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); 181 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); 182 resplen = 8; 183 break; 184 case 0x00048004: /* Set virtual display width/height */ 185 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); 186 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); 187 bcm2835_fb_validate_config(&fbconfig); 188 fbconfig_updated = true; 189 /* fall through */ 190 case 0x00040004: /* Get virtual display width/height */ 191 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); 192 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); 193 resplen = 8; 194 break; 195 case 0x00044005: /* Test depth */ 196 resplen = 4; 197 break; 198 case 0x00048005: /* Set depth */ 199 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); 200 bcm2835_fb_validate_config(&fbconfig); 201 fbconfig_updated = true; 202 /* fall through */ 203 case 0x00040005: /* Get depth */ 204 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); 205 resplen = 4; 206 break; 207 case 0x00044006: /* Test pixel order */ 208 resplen = 4; 209 break; 210 case 0x00048006: /* Set pixel order */ 211 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); 212 bcm2835_fb_validate_config(&fbconfig); 213 fbconfig_updated = true; 214 /* fall through */ 215 case 0x00040006: /* Get pixel order */ 216 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); 217 resplen = 4; 218 break; 219 case 0x00044007: /* Test pixel alpha */ 220 resplen = 4; 221 break; 222 case 0x00048007: /* Set alpha */ 223 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); 224 bcm2835_fb_validate_config(&fbconfig); 225 fbconfig_updated = true; 226 /* fall through */ 227 case 0x00040007: /* Get alpha */ 228 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); 229 resplen = 4; 230 break; 231 case 0x00040008: /* Get pitch */ 232 stl_le_phys(&s->dma_as, value + 12, 233 bcm2835_fb_get_pitch(&fbconfig)); 234 resplen = 4; 235 break; 236 case 0x00044009: /* Test virtual offset */ 237 resplen = 8; 238 break; 239 case 0x00048009: /* Set virtual offset */ 240 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); 241 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); 242 bcm2835_fb_validate_config(&fbconfig); 243 fbconfig_updated = true; 244 /* fall through */ 245 case 0x00040009: /* Get virtual offset */ 246 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); 247 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); 248 resplen = 8; 249 break; 250 case 0x0004000a: /* Get/Test/Set overscan */ 251 case 0x0004400a: 252 case 0x0004800a: 253 stl_le_phys(&s->dma_as, value + 12, 0); 254 stl_le_phys(&s->dma_as, value + 16, 0); 255 stl_le_phys(&s->dma_as, value + 20, 0); 256 stl_le_phys(&s->dma_as, value + 24, 0); 257 resplen = 16; 258 break; 259 case 0x0004800b: /* Set palette */ 260 offset = ldl_le_phys(&s->dma_as, value + 12); 261 length = ldl_le_phys(&s->dma_as, value + 16); 262 n = 0; 263 while (n < length - offset) { 264 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 265 stl_le_phys(&s->dma_as, 266 s->fbdev->vcram_base + ((offset + n) << 2), color); 267 n++; 268 } 269 stl_le_phys(&s->dma_as, value + 12, 0); 270 resplen = 4; 271 break; 272 273 case 0x00060001: /* Get DMA channels */ 274 /* channels 2-5 */ 275 stl_le_phys(&s->dma_as, value + 12, 0x003C); 276 resplen = 4; 277 break; 278 279 case 0x00050001: /* Get command line */ 280 resplen = 0; 281 break; 282 283 default: 284 qemu_log_mask(LOG_UNIMP, 285 "bcm2835_property: unhandled tag 0x%08x\n", tag); 286 break; 287 } 288 289 trace_bcm2835_mbox_property(tag, bufsize, resplen); 290 if (tag == 0) { 291 break; 292 } 293 294 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 295 value += bufsize + 12; 296 } 297 298 /* Reconfigure framebuffer if required */ 299 if (fbconfig_updated) { 300 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 301 } 302 303 /* Buffer response code */ 304 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 305 } 306 307 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 308 unsigned size) 309 { 310 BCM2835PropertyState *s = opaque; 311 uint32_t res = 0; 312 313 switch (offset) { 314 case MBOX_AS_DATA: 315 res = MBOX_CHAN_PROPERTY | s->addr; 316 s->pending = false; 317 qemu_set_irq(s->mbox_irq, 0); 318 break; 319 320 case MBOX_AS_PENDING: 321 res = s->pending; 322 break; 323 324 default: 325 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 326 __func__, offset); 327 return 0; 328 } 329 330 return res; 331 } 332 333 static void bcm2835_property_write(void *opaque, hwaddr offset, 334 uint64_t value, unsigned size) 335 { 336 BCM2835PropertyState *s = opaque; 337 338 switch (offset) { 339 case MBOX_AS_DATA: 340 /* bcm2835_mbox should check our pending status before pushing */ 341 assert(!s->pending); 342 s->pending = true; 343 bcm2835_property_mbox_push(s, value); 344 qemu_set_irq(s->mbox_irq, 1); 345 break; 346 347 default: 348 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 349 __func__, offset); 350 return; 351 } 352 } 353 354 static const MemoryRegionOps bcm2835_property_ops = { 355 .read = bcm2835_property_read, 356 .write = bcm2835_property_write, 357 .endianness = DEVICE_NATIVE_ENDIAN, 358 .valid.min_access_size = 4, 359 .valid.max_access_size = 4, 360 }; 361 362 static const VMStateDescription vmstate_bcm2835_property = { 363 .name = TYPE_BCM2835_PROPERTY, 364 .version_id = 1, 365 .minimum_version_id = 1, 366 .fields = (VMStateField[]) { 367 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 368 VMSTATE_UINT32(addr, BCM2835PropertyState), 369 VMSTATE_BOOL(pending, BCM2835PropertyState), 370 VMSTATE_END_OF_LIST() 371 } 372 }; 373 374 static void bcm2835_property_init(Object *obj) 375 { 376 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 377 378 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 379 TYPE_BCM2835_PROPERTY, 0x10); 380 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 381 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 382 } 383 384 static void bcm2835_property_reset(DeviceState *dev) 385 { 386 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 387 388 s->pending = false; 389 } 390 391 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 392 { 393 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 394 Object *obj; 395 Error *err = NULL; 396 397 obj = object_property_get_link(OBJECT(dev), "fb", &err); 398 if (obj == NULL) { 399 error_setg(errp, "%s: required fb link not found: %s", 400 __func__, error_get_pretty(err)); 401 return; 402 } 403 404 s->fbdev = BCM2835_FB(obj); 405 406 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); 407 if (obj == NULL) { 408 error_setg(errp, "%s: required dma-mr link not found: %s", 409 __func__, error_get_pretty(err)); 410 return; 411 } 412 413 s->dma_mr = MEMORY_REGION(obj); 414 address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory"); 415 416 /* TODO: connect to MAC address of USB NIC device, once we emulate it */ 417 qemu_macaddr_default_if_unset(&s->macaddr); 418 419 bcm2835_property_reset(dev); 420 } 421 422 static Property bcm2835_property_props[] = { 423 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), 424 DEFINE_PROP_END_OF_LIST() 425 }; 426 427 static void bcm2835_property_class_init(ObjectClass *klass, void *data) 428 { 429 DeviceClass *dc = DEVICE_CLASS(klass); 430 431 device_class_set_props(dc, bcm2835_property_props); 432 dc->realize = bcm2835_property_realize; 433 dc->vmsd = &vmstate_bcm2835_property; 434 } 435 436 static TypeInfo bcm2835_property_info = { 437 .name = TYPE_BCM2835_PROPERTY, 438 .parent = TYPE_SYS_BUS_DEVICE, 439 .instance_size = sizeof(BCM2835PropertyState), 440 .class_init = bcm2835_property_class_init, 441 .instance_init = bcm2835_property_init, 442 }; 443 444 static void bcm2835_property_register_types(void) 445 { 446 type_register_static(&bcm2835_property_info); 447 } 448 449 type_init(bcm2835_property_register_types) 450