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 #include "qemu/module.h" 13 14 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */ 15 16 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) 17 { 18 uint32_t tag; 19 uint32_t bufsize; 20 uint32_t tot_len; 21 size_t resplen; 22 uint32_t tmp; 23 int n; 24 uint32_t offset, length, color; 25 26 /* 27 * Copy the current state of the framebuffer config; we will update 28 * this copy as we process tags and then ask the framebuffer to use 29 * it at the end. 30 */ 31 BCM2835FBConfig fbconfig = s->fbdev->config; 32 bool fbconfig_updated = false; 33 34 value &= ~0xf; 35 36 s->addr = value; 37 38 tot_len = ldl_le_phys(&s->dma_as, value); 39 40 /* @(addr + 4) : Buffer response code */ 41 value = s->addr + 8; 42 while (value + 8 <= s->addr + tot_len) { 43 tag = ldl_le_phys(&s->dma_as, value); 44 bufsize = ldl_le_phys(&s->dma_as, value + 4); 45 /* @(value + 8) : Request/response indicator */ 46 resplen = 0; 47 switch (tag) { 48 case 0x00000000: /* End tag */ 49 break; 50 case 0x00000001: /* Get firmware revision */ 51 stl_le_phys(&s->dma_as, value + 12, 346337); 52 resplen = 4; 53 break; 54 case 0x00010001: /* Get board model */ 55 qemu_log_mask(LOG_UNIMP, 56 "bcm2835_property: %x get board model NYI\n", tag); 57 resplen = 4; 58 break; 59 case 0x00010002: /* Get board revision */ 60 stl_le_phys(&s->dma_as, value + 12, s->board_rev); 61 resplen = 4; 62 break; 63 case 0x00010003: /* Get board MAC address */ 64 resplen = sizeof(s->macaddr.a); 65 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen); 66 break; 67 case 0x00010004: /* Get board serial */ 68 qemu_log_mask(LOG_UNIMP, 69 "bcm2835_property: %x get board serial NYI\n", tag); 70 resplen = 8; 71 break; 72 case 0x00010005: /* Get ARM memory */ 73 /* base */ 74 stl_le_phys(&s->dma_as, value + 12, 0); 75 /* size */ 76 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); 77 resplen = 8; 78 break; 79 case 0x00010006: /* Get VC memory */ 80 /* base */ 81 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); 82 /* size */ 83 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); 84 resplen = 8; 85 break; 86 case 0x00028001: /* Set power state */ 87 /* Assume that whatever device they asked for exists, 88 * and we'll just claim we set it to the desired state 89 */ 90 tmp = ldl_le_phys(&s->dma_as, value + 16); 91 stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); 92 resplen = 8; 93 break; 94 95 /* Clocks */ 96 97 case 0x00030001: /* Get clock state */ 98 stl_le_phys(&s->dma_as, value + 16, 0x1); 99 resplen = 8; 100 break; 101 102 case 0x00038001: /* Set clock state */ 103 qemu_log_mask(LOG_UNIMP, 104 "bcm2835_property: %x set clock state NYI\n", tag); 105 resplen = 8; 106 break; 107 108 case 0x00030002: /* Get clock rate */ 109 case 0x00030004: /* Get max clock rate */ 110 case 0x00030007: /* Get min clock rate */ 111 switch (ldl_le_phys(&s->dma_as, value + 12)) { 112 case 1: /* EMMC */ 113 stl_le_phys(&s->dma_as, value + 16, 50000000); 114 break; 115 case 2: /* UART */ 116 stl_le_phys(&s->dma_as, value + 16, 3000000); 117 break; 118 default: 119 stl_le_phys(&s->dma_as, value + 16, 700000000); 120 break; 121 } 122 resplen = 8; 123 break; 124 125 case 0x00038002: /* Set clock rate */ 126 case 0x00038004: /* Set max clock rate */ 127 case 0x00038007: /* Set min clock rate */ 128 qemu_log_mask(LOG_UNIMP, 129 "bcm2835_property: %x set clock rates NYI\n", tag); 130 resplen = 8; 131 break; 132 133 /* Temperature */ 134 135 case 0x00030006: /* Get temperature */ 136 stl_le_phys(&s->dma_as, value + 16, 25000); 137 resplen = 8; 138 break; 139 140 case 0x0003000A: /* Get max temperature */ 141 stl_le_phys(&s->dma_as, value + 16, 99000); 142 resplen = 8; 143 break; 144 145 /* Frame buffer */ 146 147 case 0x00040001: /* Allocate buffer */ 148 stl_le_phys(&s->dma_as, value + 12, fbconfig.base); 149 stl_le_phys(&s->dma_as, value + 16, 150 bcm2835_fb_get_size(&fbconfig)); 151 resplen = 8; 152 break; 153 case 0x00048001: /* Release buffer */ 154 resplen = 0; 155 break; 156 case 0x00040002: /* Blank screen */ 157 resplen = 4; 158 break; 159 case 0x00044003: /* Test physical display width/height */ 160 case 0x00044004: /* Test virtual display width/height */ 161 resplen = 8; 162 break; 163 case 0x00048003: /* Set physical display width/height */ 164 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); 165 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); 166 bcm2835_fb_validate_config(&fbconfig); 167 fbconfig_updated = true; 168 /* fall through */ 169 case 0x00040003: /* Get physical display width/height */ 170 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); 171 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); 172 resplen = 8; 173 break; 174 case 0x00048004: /* Set virtual display width/height */ 175 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); 176 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); 177 bcm2835_fb_validate_config(&fbconfig); 178 fbconfig_updated = true; 179 /* fall through */ 180 case 0x00040004: /* Get virtual display width/height */ 181 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); 182 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); 183 resplen = 8; 184 break; 185 case 0x00044005: /* Test depth */ 186 resplen = 4; 187 break; 188 case 0x00048005: /* Set depth */ 189 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); 190 bcm2835_fb_validate_config(&fbconfig); 191 fbconfig_updated = true; 192 /* fall through */ 193 case 0x00040005: /* Get depth */ 194 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); 195 resplen = 4; 196 break; 197 case 0x00044006: /* Test pixel order */ 198 resplen = 4; 199 break; 200 case 0x00048006: /* Set pixel order */ 201 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); 202 bcm2835_fb_validate_config(&fbconfig); 203 fbconfig_updated = true; 204 /* fall through */ 205 case 0x00040006: /* Get pixel order */ 206 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); 207 resplen = 4; 208 break; 209 case 0x00044007: /* Test pixel alpha */ 210 resplen = 4; 211 break; 212 case 0x00048007: /* Set alpha */ 213 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); 214 bcm2835_fb_validate_config(&fbconfig); 215 fbconfig_updated = true; 216 /* fall through */ 217 case 0x00040007: /* Get alpha */ 218 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); 219 resplen = 4; 220 break; 221 case 0x00040008: /* Get pitch */ 222 stl_le_phys(&s->dma_as, value + 12, 223 bcm2835_fb_get_pitch(&fbconfig)); 224 resplen = 4; 225 break; 226 case 0x00044009: /* Test virtual offset */ 227 resplen = 8; 228 break; 229 case 0x00048009: /* Set virtual offset */ 230 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); 231 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); 232 bcm2835_fb_validate_config(&fbconfig); 233 fbconfig_updated = true; 234 /* fall through */ 235 case 0x00040009: /* Get virtual offset */ 236 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); 237 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); 238 resplen = 8; 239 break; 240 case 0x0004000a: /* Get/Test/Set overscan */ 241 case 0x0004400a: 242 case 0x0004800a: 243 stl_le_phys(&s->dma_as, value + 12, 0); 244 stl_le_phys(&s->dma_as, value + 16, 0); 245 stl_le_phys(&s->dma_as, value + 20, 0); 246 stl_le_phys(&s->dma_as, value + 24, 0); 247 resplen = 16; 248 break; 249 case 0x0004800b: /* Set palette */ 250 offset = ldl_le_phys(&s->dma_as, value + 12); 251 length = ldl_le_phys(&s->dma_as, value + 16); 252 n = 0; 253 while (n < length - offset) { 254 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 255 stl_le_phys(&s->dma_as, 256 s->fbdev->vcram_base + ((offset + n) << 2), color); 257 n++; 258 } 259 stl_le_phys(&s->dma_as, value + 12, 0); 260 resplen = 4; 261 break; 262 263 case 0x00060001: /* Get DMA channels */ 264 /* channels 2-5 */ 265 stl_le_phys(&s->dma_as, value + 12, 0x003C); 266 resplen = 4; 267 break; 268 269 case 0x00050001: /* Get command line */ 270 resplen = 0; 271 break; 272 273 default: 274 qemu_log_mask(LOG_GUEST_ERROR, 275 "bcm2835_property: unhandled tag %08x\n", tag); 276 break; 277 } 278 279 if (tag == 0) { 280 break; 281 } 282 283 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 284 value += bufsize + 12; 285 } 286 287 /* Reconfigure framebuffer if required */ 288 if (fbconfig_updated) { 289 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 290 } 291 292 /* Buffer response code */ 293 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 294 } 295 296 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 297 unsigned size) 298 { 299 BCM2835PropertyState *s = opaque; 300 uint32_t res = 0; 301 302 switch (offset) { 303 case MBOX_AS_DATA: 304 res = MBOX_CHAN_PROPERTY | s->addr; 305 s->pending = false; 306 qemu_set_irq(s->mbox_irq, 0); 307 break; 308 309 case MBOX_AS_PENDING: 310 res = s->pending; 311 break; 312 313 default: 314 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 315 __func__, offset); 316 return 0; 317 } 318 319 return res; 320 } 321 322 static void bcm2835_property_write(void *opaque, hwaddr offset, 323 uint64_t value, unsigned size) 324 { 325 BCM2835PropertyState *s = opaque; 326 327 switch (offset) { 328 case MBOX_AS_DATA: 329 /* bcm2835_mbox should check our pending status before pushing */ 330 assert(!s->pending); 331 s->pending = true; 332 bcm2835_property_mbox_push(s, value); 333 qemu_set_irq(s->mbox_irq, 1); 334 break; 335 336 default: 337 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 338 __func__, offset); 339 return; 340 } 341 } 342 343 static const MemoryRegionOps bcm2835_property_ops = { 344 .read = bcm2835_property_read, 345 .write = bcm2835_property_write, 346 .endianness = DEVICE_NATIVE_ENDIAN, 347 .valid.min_access_size = 4, 348 .valid.max_access_size = 4, 349 }; 350 351 static const VMStateDescription vmstate_bcm2835_property = { 352 .name = TYPE_BCM2835_PROPERTY, 353 .version_id = 1, 354 .minimum_version_id = 1, 355 .fields = (VMStateField[]) { 356 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 357 VMSTATE_UINT32(addr, BCM2835PropertyState), 358 VMSTATE_BOOL(pending, BCM2835PropertyState), 359 VMSTATE_END_OF_LIST() 360 } 361 }; 362 363 static void bcm2835_property_init(Object *obj) 364 { 365 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 366 367 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 368 TYPE_BCM2835_PROPERTY, 0x10); 369 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 370 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 371 } 372 373 static void bcm2835_property_reset(DeviceState *dev) 374 { 375 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 376 377 s->pending = false; 378 } 379 380 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 381 { 382 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 383 Object *obj; 384 Error *err = NULL; 385 386 obj = object_property_get_link(OBJECT(dev), "fb", &err); 387 if (obj == NULL) { 388 error_setg(errp, "%s: required fb link not found: %s", 389 __func__, error_get_pretty(err)); 390 return; 391 } 392 393 s->fbdev = BCM2835_FB(obj); 394 395 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); 396 if (obj == NULL) { 397 error_setg(errp, "%s: required dma-mr link not found: %s", 398 __func__, error_get_pretty(err)); 399 return; 400 } 401 402 s->dma_mr = MEMORY_REGION(obj); 403 address_space_init(&s->dma_as, s->dma_mr, NULL); 404 405 /* TODO: connect to MAC address of USB NIC device, once we emulate it */ 406 qemu_macaddr_default_if_unset(&s->macaddr); 407 408 bcm2835_property_reset(dev); 409 } 410 411 static Property bcm2835_property_props[] = { 412 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), 413 DEFINE_PROP_END_OF_LIST() 414 }; 415 416 static void bcm2835_property_class_init(ObjectClass *klass, void *data) 417 { 418 DeviceClass *dc = DEVICE_CLASS(klass); 419 420 dc->props = bcm2835_property_props; 421 dc->realize = bcm2835_property_realize; 422 dc->vmsd = &vmstate_bcm2835_property; 423 } 424 425 static TypeInfo bcm2835_property_info = { 426 .name = TYPE_BCM2835_PROPERTY, 427 .parent = TYPE_SYS_BUS_DEVICE, 428 .instance_size = sizeof(BCM2835PropertyState), 429 .class_init = bcm2835_property_class_init, 430 .instance_init = bcm2835_property_init, 431 }; 432 433 static void bcm2835_property_register_types(void) 434 { 435 type_register_static(&bcm2835_property_info); 436 } 437 438 type_init(bcm2835_property_register_types) 439