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/irq.h" 10 #include "hw/misc/bcm2835_mbox_defs.h" 11 #include "sysemu/dma.h" 12 #include "qemu/log.h" 13 #include "qemu/module.h" 14 15 /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */ 16 17 static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) 18 { 19 uint32_t tag; 20 uint32_t bufsize; 21 uint32_t tot_len; 22 size_t resplen; 23 uint32_t tmp; 24 int n; 25 uint32_t offset, length, color; 26 27 /* 28 * Copy the current state of the framebuffer config; we will update 29 * this copy as we process tags and then ask the framebuffer to use 30 * it at the end. 31 */ 32 BCM2835FBConfig fbconfig = s->fbdev->config; 33 bool fbconfig_updated = false; 34 35 value &= ~0xf; 36 37 s->addr = value; 38 39 tot_len = ldl_le_phys(&s->dma_as, value); 40 41 /* @(addr + 4) : Buffer response code */ 42 value = s->addr + 8; 43 while (value + 8 <= s->addr + tot_len) { 44 tag = ldl_le_phys(&s->dma_as, value); 45 bufsize = ldl_le_phys(&s->dma_as, value + 4); 46 /* @(value + 8) : Request/response indicator */ 47 resplen = 0; 48 switch (tag) { 49 case 0x00000000: /* End tag */ 50 break; 51 case 0x00000001: /* Get firmware revision */ 52 stl_le_phys(&s->dma_as, value + 12, 346337); 53 resplen = 4; 54 break; 55 case 0x00010001: /* Get board model */ 56 qemu_log_mask(LOG_UNIMP, 57 "bcm2835_property: %x get board model NYI\n", tag); 58 resplen = 4; 59 break; 60 case 0x00010002: /* Get board revision */ 61 stl_le_phys(&s->dma_as, value + 12, s->board_rev); 62 resplen = 4; 63 break; 64 case 0x00010003: /* Get board MAC address */ 65 resplen = sizeof(s->macaddr.a); 66 dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen); 67 break; 68 case 0x00010004: /* Get board serial */ 69 qemu_log_mask(LOG_UNIMP, 70 "bcm2835_property: %x get board serial NYI\n", tag); 71 resplen = 8; 72 break; 73 case 0x00010005: /* Get ARM memory */ 74 /* base */ 75 stl_le_phys(&s->dma_as, value + 12, 0); 76 /* size */ 77 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); 78 resplen = 8; 79 break; 80 case 0x00010006: /* Get VC memory */ 81 /* base */ 82 stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); 83 /* size */ 84 stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); 85 resplen = 8; 86 break; 87 case 0x00028001: /* Set power state */ 88 /* Assume that whatever device they asked for exists, 89 * and we'll just claim we set it to the desired state 90 */ 91 tmp = ldl_le_phys(&s->dma_as, value + 16); 92 stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); 93 resplen = 8; 94 break; 95 96 /* Clocks */ 97 98 case 0x00030001: /* Get clock state */ 99 stl_le_phys(&s->dma_as, value + 16, 0x1); 100 resplen = 8; 101 break; 102 103 case 0x00038001: /* Set clock state */ 104 qemu_log_mask(LOG_UNIMP, 105 "bcm2835_property: %x set clock state NYI\n", tag); 106 resplen = 8; 107 break; 108 109 case 0x00030002: /* Get clock rate */ 110 case 0x00030004: /* Get max clock rate */ 111 case 0x00030007: /* Get min clock rate */ 112 switch (ldl_le_phys(&s->dma_as, value + 12)) { 113 case 1: /* EMMC */ 114 stl_le_phys(&s->dma_as, value + 16, 50000000); 115 break; 116 case 2: /* UART */ 117 stl_le_phys(&s->dma_as, value + 16, 3000000); 118 break; 119 default: 120 stl_le_phys(&s->dma_as, value + 16, 700000000); 121 break; 122 } 123 resplen = 8; 124 break; 125 126 case 0x00038002: /* Set clock rate */ 127 case 0x00038004: /* Set max clock rate */ 128 case 0x00038007: /* Set min clock rate */ 129 qemu_log_mask(LOG_UNIMP, 130 "bcm2835_property: %x set clock rates NYI\n", tag); 131 resplen = 8; 132 break; 133 134 /* Temperature */ 135 136 case 0x00030006: /* Get temperature */ 137 stl_le_phys(&s->dma_as, value + 16, 25000); 138 resplen = 8; 139 break; 140 141 case 0x0003000A: /* Get max temperature */ 142 stl_le_phys(&s->dma_as, value + 16, 99000); 143 resplen = 8; 144 break; 145 146 /* Frame buffer */ 147 148 case 0x00040001: /* Allocate buffer */ 149 stl_le_phys(&s->dma_as, value + 12, fbconfig.base); 150 stl_le_phys(&s->dma_as, value + 16, 151 bcm2835_fb_get_size(&fbconfig)); 152 resplen = 8; 153 break; 154 case 0x00048001: /* Release buffer */ 155 resplen = 0; 156 break; 157 case 0x00040002: /* Blank screen */ 158 resplen = 4; 159 break; 160 case 0x00044003: /* Test physical display width/height */ 161 case 0x00044004: /* Test virtual display width/height */ 162 resplen = 8; 163 break; 164 case 0x00048003: /* Set physical display width/height */ 165 fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); 166 fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); 167 bcm2835_fb_validate_config(&fbconfig); 168 fbconfig_updated = true; 169 /* fall through */ 170 case 0x00040003: /* Get physical display width/height */ 171 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); 172 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); 173 resplen = 8; 174 break; 175 case 0x00048004: /* Set virtual display width/height */ 176 fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); 177 fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); 178 bcm2835_fb_validate_config(&fbconfig); 179 fbconfig_updated = true; 180 /* fall through */ 181 case 0x00040004: /* Get virtual display width/height */ 182 stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); 183 stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); 184 resplen = 8; 185 break; 186 case 0x00044005: /* Test depth */ 187 resplen = 4; 188 break; 189 case 0x00048005: /* Set depth */ 190 fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); 191 bcm2835_fb_validate_config(&fbconfig); 192 fbconfig_updated = true; 193 /* fall through */ 194 case 0x00040005: /* Get depth */ 195 stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); 196 resplen = 4; 197 break; 198 case 0x00044006: /* Test pixel order */ 199 resplen = 4; 200 break; 201 case 0x00048006: /* Set pixel order */ 202 fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); 203 bcm2835_fb_validate_config(&fbconfig); 204 fbconfig_updated = true; 205 /* fall through */ 206 case 0x00040006: /* Get pixel order */ 207 stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); 208 resplen = 4; 209 break; 210 case 0x00044007: /* Test pixel alpha */ 211 resplen = 4; 212 break; 213 case 0x00048007: /* Set alpha */ 214 fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); 215 bcm2835_fb_validate_config(&fbconfig); 216 fbconfig_updated = true; 217 /* fall through */ 218 case 0x00040007: /* Get alpha */ 219 stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); 220 resplen = 4; 221 break; 222 case 0x00040008: /* Get pitch */ 223 stl_le_phys(&s->dma_as, value + 12, 224 bcm2835_fb_get_pitch(&fbconfig)); 225 resplen = 4; 226 break; 227 case 0x00044009: /* Test virtual offset */ 228 resplen = 8; 229 break; 230 case 0x00048009: /* Set virtual offset */ 231 fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); 232 fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); 233 bcm2835_fb_validate_config(&fbconfig); 234 fbconfig_updated = true; 235 /* fall through */ 236 case 0x00040009: /* Get virtual offset */ 237 stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); 238 stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); 239 resplen = 8; 240 break; 241 case 0x0004000a: /* Get/Test/Set overscan */ 242 case 0x0004400a: 243 case 0x0004800a: 244 stl_le_phys(&s->dma_as, value + 12, 0); 245 stl_le_phys(&s->dma_as, value + 16, 0); 246 stl_le_phys(&s->dma_as, value + 20, 0); 247 stl_le_phys(&s->dma_as, value + 24, 0); 248 resplen = 16; 249 break; 250 case 0x0004800b: /* Set palette */ 251 offset = ldl_le_phys(&s->dma_as, value + 12); 252 length = ldl_le_phys(&s->dma_as, value + 16); 253 n = 0; 254 while (n < length - offset) { 255 color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); 256 stl_le_phys(&s->dma_as, 257 s->fbdev->vcram_base + ((offset + n) << 2), color); 258 n++; 259 } 260 stl_le_phys(&s->dma_as, value + 12, 0); 261 resplen = 4; 262 break; 263 264 case 0x00060001: /* Get DMA channels */ 265 /* channels 2-5 */ 266 stl_le_phys(&s->dma_as, value + 12, 0x003C); 267 resplen = 4; 268 break; 269 270 case 0x00050001: /* Get command line */ 271 resplen = 0; 272 break; 273 274 default: 275 qemu_log_mask(LOG_GUEST_ERROR, 276 "bcm2835_property: unhandled tag %08x\n", tag); 277 break; 278 } 279 280 if (tag == 0) { 281 break; 282 } 283 284 stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); 285 value += bufsize + 12; 286 } 287 288 /* Reconfigure framebuffer if required */ 289 if (fbconfig_updated) { 290 bcm2835_fb_reconfigure(s->fbdev, &fbconfig); 291 } 292 293 /* Buffer response code */ 294 stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); 295 } 296 297 static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, 298 unsigned size) 299 { 300 BCM2835PropertyState *s = opaque; 301 uint32_t res = 0; 302 303 switch (offset) { 304 case MBOX_AS_DATA: 305 res = MBOX_CHAN_PROPERTY | s->addr; 306 s->pending = false; 307 qemu_set_irq(s->mbox_irq, 0); 308 break; 309 310 case MBOX_AS_PENDING: 311 res = s->pending; 312 break; 313 314 default: 315 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 316 __func__, offset); 317 return 0; 318 } 319 320 return res; 321 } 322 323 static void bcm2835_property_write(void *opaque, hwaddr offset, 324 uint64_t value, unsigned size) 325 { 326 BCM2835PropertyState *s = opaque; 327 328 switch (offset) { 329 case MBOX_AS_DATA: 330 /* bcm2835_mbox should check our pending status before pushing */ 331 assert(!s->pending); 332 s->pending = true; 333 bcm2835_property_mbox_push(s, value); 334 qemu_set_irq(s->mbox_irq, 1); 335 break; 336 337 default: 338 qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", 339 __func__, offset); 340 return; 341 } 342 } 343 344 static const MemoryRegionOps bcm2835_property_ops = { 345 .read = bcm2835_property_read, 346 .write = bcm2835_property_write, 347 .endianness = DEVICE_NATIVE_ENDIAN, 348 .valid.min_access_size = 4, 349 .valid.max_access_size = 4, 350 }; 351 352 static const VMStateDescription vmstate_bcm2835_property = { 353 .name = TYPE_BCM2835_PROPERTY, 354 .version_id = 1, 355 .minimum_version_id = 1, 356 .fields = (VMStateField[]) { 357 VMSTATE_MACADDR(macaddr, BCM2835PropertyState), 358 VMSTATE_UINT32(addr, BCM2835PropertyState), 359 VMSTATE_BOOL(pending, BCM2835PropertyState), 360 VMSTATE_END_OF_LIST() 361 } 362 }; 363 364 static void bcm2835_property_init(Object *obj) 365 { 366 BCM2835PropertyState *s = BCM2835_PROPERTY(obj); 367 368 memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, 369 TYPE_BCM2835_PROPERTY, 0x10); 370 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); 371 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); 372 } 373 374 static void bcm2835_property_reset(DeviceState *dev) 375 { 376 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 377 378 s->pending = false; 379 } 380 381 static void bcm2835_property_realize(DeviceState *dev, Error **errp) 382 { 383 BCM2835PropertyState *s = BCM2835_PROPERTY(dev); 384 Object *obj; 385 Error *err = NULL; 386 387 obj = object_property_get_link(OBJECT(dev), "fb", &err); 388 if (obj == NULL) { 389 error_setg(errp, "%s: required fb link not found: %s", 390 __func__, error_get_pretty(err)); 391 return; 392 } 393 394 s->fbdev = BCM2835_FB(obj); 395 396 obj = object_property_get_link(OBJECT(dev), "dma-mr", &err); 397 if (obj == NULL) { 398 error_setg(errp, "%s: required dma-mr link not found: %s", 399 __func__, error_get_pretty(err)); 400 return; 401 } 402 403 s->dma_mr = MEMORY_REGION(obj); 404 address_space_init(&s->dma_as, s->dma_mr, NULL); 405 406 /* TODO: connect to MAC address of USB NIC device, once we emulate it */ 407 qemu_macaddr_default_if_unset(&s->macaddr); 408 409 bcm2835_property_reset(dev); 410 } 411 412 static Property bcm2835_property_props[] = { 413 DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), 414 DEFINE_PROP_END_OF_LIST() 415 }; 416 417 static void bcm2835_property_class_init(ObjectClass *klass, void *data) 418 { 419 DeviceClass *dc = DEVICE_CLASS(klass); 420 421 dc->props = bcm2835_property_props; 422 dc->realize = bcm2835_property_realize; 423 dc->vmsd = &vmstate_bcm2835_property; 424 } 425 426 static TypeInfo bcm2835_property_info = { 427 .name = TYPE_BCM2835_PROPERTY, 428 .parent = TYPE_SYS_BUS_DEVICE, 429 .instance_size = sizeof(BCM2835PropertyState), 430 .class_init = bcm2835_property_class_init, 431 .instance_init = bcm2835_property_init, 432 }; 433 434 static void bcm2835_property_register_types(void) 435 { 436 type_register_static(&bcm2835_property_info); 437 } 438 439 type_init(bcm2835_property_register_types) 440