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 "migration/vmstate.h" 10 #include "hw/irq.h" 11 #include "hw/misc/bcm2835_mbox_defs.h" 12 #include "sysemu/dma.h" 13 #include "qemu/log.h" 14 #include "qemu/module.h" 15 16 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */ 17 18 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) 19 { 20 uint32_t tag; 21 uint32_t bufsize; 22 uint32_t tot_len; 23 size_t resplen; 24 uint32_t tmp; 25 int n; 26 uint32_t offset, length, color; 27 28 /* 29 * Copy the current state of the framebuffer config; we will update 30 * this copy as we process tags and then ask the framebuffer to use 31 * it at the end. 32 */ 33 BCM2835FBConfig fbconfig = s->fbdev->config; 34 bool fbconfig_updated = false; 35 36 value &= ~0xf; 37 38 s->addr = value; 39 40 tot_len = ldl_le_phys(&s->dma_as, value); 41 42 /* @(addr + 4) : Buffer response code */ 43 value = s->addr + 8; 44 while (value + 8 <= s->addr + tot_len) { 45 tag = ldl_le_phys(&s->dma_as, value); 46 bufsize = ldl_le_phys(&s->dma_as, value + 4); 47 /* @(value + 8) : Request/response indicator */ 48 resplen = 0; 49 switch (tag) { 50 case 0x00000000: /* End tag */ 51 break; 52 case 0x00000001: /* Get firmware revision */ 53 stl_le_phys(&s->dma_as, value + 12, 346337); 54 resplen = 4; 55 break; 56 case 0x00010001: /* Get board model */ 57 qemu_log_mask(LOG_UNIMP, 58 "bcm2835_property: %x get board model NYI\n", tag); 59 resplen = 4; 60 break; 61 case 0x00010002: /* Get board revision */ 62 stl_le_phys(&s->dma_as, value + 12, s->board_rev); 63 resplen = 4; 64 break; 65 case 0x00010003: /* Get board MAC address */ 66 resplen = sizeof(s->macaddr.a); 67 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen); 68 break; 69 case 0x00010004: /* Get board serial */ 70 qemu_log_mask(LOG_UNIMP, 71 "bcm2835_property: %x get board serial NYI\n", tag); 72 resplen = 8; 73 break; 74 case 0x00010005: /* Get ARM memory */ 75 /* base */ 76 stl_le_phys(&s->dma_as, value + 12, 0); 77 /* size */ 78 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); 79 resplen = 8; 80 break; 81 case 0x00010006: /* Get VC memory */ 82 /* base */ 83 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); 84 /* size */ 85 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); 86 resplen = 8; 87 break; 88 case 0x00028001: /* Set power state */ 89 /* Assume that whatever device they asked for exists, 90 * and we'll just claim we set it to the desired state 91 */ 92 tmp = ldl_le_phys(&s->dma_as, value + 16); 93 stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); 94 resplen = 8; 95 break; 96 97 /* Clocks */ 98 99 case 0x00030001: /* Get clock state */ 100 stl_le_phys(&s->dma_as, value + 16, 0x1); 101 resplen = 8; 102 break; 103 104 case 0x00038001: /* Set clock state */ 105 qemu_log_mask(LOG_UNIMP, 106 "bcm2835_property: %x set clock state NYI\n", tag); 107 resplen = 8; 108 break; 109 110 case 0x00030002: /* Get clock rate */ 111 case 0x00030004: /* Get max clock rate */ 112 case 0x00030007: /* Get min clock rate */ 113 switch (ldl_le_phys(&s->dma_as, value + 12)) { 114 case 1: /* EMMC */ 115 stl_le_phys(&s->dma_as, value + 16, 50000000); 116 break; 117 case 2: /* UART */ 118 stl_le_phys(&s->dma_as, value + 16, 3000000); 119 break; 120 default: 121 stl_le_phys(&s->dma_as, value + 16, 700000000); 122 break; 123 } 124 resplen = 8; 125 break; 126 127 case 0x00038002: /* Set clock rate */ 128 case 0x00038004: /* Set max clock rate */ 129 case 0x00038007: /* Set min clock rate */ 130 qemu_log_mask(LOG_UNIMP, 131 "bcm2835_property: %x set clock rates NYI\n", tag); 132 resplen = 8; 133 break; 134 135 /* Temperature */ 136 137 case 0x00030006: /* Get temperature */ 138 stl_le_phys(&s->dma_as, value + 16, 25000); 139 resplen = 8; 140 break; 141 142 case 0x0003000A: /* Get max temperature */ 143 stl_le_phys(&s->dma_as, value + 16, 99000); 144 resplen = 8; 145 break; 146 147 /* Frame buffer */ 148 149 case 0x00040001: /* Allocate buffer */ 150 stl_le_phys(&s->dma_as, value + 12, fbconfig.base); 151 stl_le_phys(&s->dma_as, value + 16, 152 bcm2835_fb_get_size(&fbconfig)); 153 resplen = 8; 154 break; 155 case 0x00048001: /* Release buffer */ 156 resplen = 0; 157 break; 158 case 0x00040002: /* Blank screen */ 159 resplen = 4; 160 break; 161 case 0x00044003: /* Test physical display width/height */ 162 case 0x00044004: /* Test virtual display width/height */ 163 resplen = 8; 164 break; 165 case 0x00048003: /* Set physical display width/height */ 166 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); 167 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); 168 bcm2835_fb_validate_config(&fbconfig); 169 fbconfig_updated = true; 170 /* fall through */ 171 case 0x00040003: /* Get physical display width/height */ 172 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); 173 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); 174 resplen = 8; 175 break; 176 case 0x00048004: /* Set virtual display width/height */ 177 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); 178 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); 179 bcm2835_fb_validate_config(&fbconfig); 180 fbconfig_updated = true; 181 /* fall through */ 182 case 0x00040004: /* Get virtual display width/height */ 183 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); 184 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); 185 resplen = 8; 186 break; 187 case 0x00044005: /* Test depth */ 188 resplen = 4; 189 break; 190 case 0x00048005: /* Set depth */ 191 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); 192 bcm2835_fb_validate_config(&fbconfig); 193 fbconfig_updated = true; 194 /* fall through */ 195 case 0x00040005: /* Get depth */ 196 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); 197 resplen = 4; 198 break; 199 case 0x00044006: /* Test pixel order */ 200 resplen = 4; 201 break; 202 case 0x00048006: /* Set pixel order */ 203 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); 204 bcm2835_fb_validate_config(&fbconfig); 205 fbconfig_updated = true; 206 /* fall through */ 207 case 0x00040006: /* Get pixel order */ 208 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); 209 resplen = 4; 210 break; 211 case 0x00044007: /* Test pixel alpha */ 212 resplen = 4; 213 break; 214 case 0x00048007: /* Set alpha */ 215 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); 216 bcm2835_fb_validate_config(&fbconfig); 217 fbconfig_updated = true; 218 /* fall through */ 219 case 0x00040007: /* Get alpha */ 220 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); 221 resplen = 4; 222 break; 223 case 0x00040008: /* Get pitch */ 224 stl_le_phys(&s->dma_as, value + 12, 225 bcm2835_fb_get_pitch(&fbconfig)); 226 resplen = 4; 227 break; 228 case 0x00044009: /* Test virtual offset */ 229 resplen = 8; 230 break; 231 case 0x00048009: /* Set virtual offset */ 232 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); 233 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); 234 bcm2835_fb_validate_config(&fbconfig); 235 fbconfig_updated = true; 236 /* fall through */ 237 case 0x00040009: /* Get virtual offset */ 238 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); 239 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); 240 resplen = 8; 241 break; 242 case 0x0004000a: /* Get/Test/Set overscan */ 243 case 0x0004400a: 244 case 0x0004800a: 245 stl_le_phys(&s->dma_as, value + 12, 0); 246 stl_le_phys(&s->dma_as, value + 16, 0); 247 stl_le_phys(&s->dma_as, value + 20, 0); 248 stl_le_phys(&s->dma_as, value + 24, 0); 249 resplen = 16; 250 break; 251 case 0x0004800b: /* Set palette */ 252 offset = ldl_le_phys(&s->dma_as, value + 12); 253 length = ldl_le_phys(&s->dma_as, value + 16); 254 n = 0; 255 while (n < length - offset) { 256 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 257 stl_le_phys(&s->dma_as, 258 s->fbdev->vcram_base + ((offset + n) << 2), color); 259 n++; 260 } 261 stl_le_phys(&s->dma_as, value + 12, 0); 262 resplen = 4; 263 break; 264 265 case 0x00060001: /* Get DMA channels */ 266 /* channels 2-5 */ 267 stl_le_phys(&s->dma_as, value + 12, 0x003C); 268 resplen = 4; 269 break; 270 271 case 0x00050001: /* Get command line */ 272 resplen = 0; 273 break; 274 275 default: 276 qemu_log_mask(LOG_GUEST_ERROR, 277 "bcm2835_property: unhandled tag %08x\n", tag); 278 break; 279 } 280 281 if (tag == 0) { 282 break; 283 } 284 285 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 286 value += bufsize + 12; 287 } 288 289 /* Reconfigure framebuffer if required */ 290 if (fbconfig_updated) { 291 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 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