1 /* 2 * (C) Copyright 2012-2016 Stephen Warren 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <common.h> 8 #include <inttypes.h> 9 #include <config.h> 10 #include <dm.h> 11 #include <efi_loader.h> 12 #include <fdt_support.h> 13 #include <fdt_simplefb.h> 14 #include <lcd.h> 15 #include <memalign.h> 16 #include <mmc.h> 17 #include <asm/gpio.h> 18 #include <asm/arch/mbox.h> 19 #include <asm/arch/msg.h> 20 #include <asm/arch/sdhci.h> 21 #include <asm/global_data.h> 22 #include <dm/platform_data/serial_bcm283x_mu.h> 23 #ifdef CONFIG_ARM64 24 #include <asm/armv8/mmu.h> 25 #endif 26 #include <watchdog.h> 27 #include <dm/pinctrl.h> 28 29 DECLARE_GLOBAL_DATA_PTR; 30 31 /* From lowlevel_init.S */ 32 extern unsigned long fw_dtb_pointer; 33 34 /* TODO(sjg@chromium.org): Move these to the msg.c file */ 35 struct msg_get_arm_mem { 36 struct bcm2835_mbox_hdr hdr; 37 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 38 u32 end_tag; 39 }; 40 41 struct msg_get_board_rev { 42 struct bcm2835_mbox_hdr hdr; 43 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 44 u32 end_tag; 45 }; 46 47 struct msg_get_board_serial { 48 struct bcm2835_mbox_hdr hdr; 49 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 50 u32 end_tag; 51 }; 52 53 struct msg_get_mac_address { 54 struct bcm2835_mbox_hdr hdr; 55 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 56 u32 end_tag; 57 }; 58 59 struct msg_get_clock_rate { 60 struct bcm2835_mbox_hdr hdr; 61 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 62 u32 end_tag; 63 }; 64 65 #ifdef CONFIG_ARM64 66 #define DTB_DIR "broadcom/" 67 #else 68 #define DTB_DIR "" 69 #endif 70 71 /* 72 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 73 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 74 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 75 * 76 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 77 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 78 * Foundation stated that the following source was accurate: 79 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 80 */ 81 struct rpi_model { 82 const char *name; 83 const char *fdtfile; 84 bool has_onboard_eth; 85 }; 86 87 static const struct rpi_model rpi_model_unknown = { 88 "Unknown model", 89 DTB_DIR "bcm283x-rpi-other.dtb", 90 false, 91 }; 92 93 static const struct rpi_model rpi_models_new_scheme[] = { 94 [0x0] = { 95 "Model A", 96 DTB_DIR "bcm2835-rpi-a.dtb", 97 false, 98 }, 99 [0x1] = { 100 "Model B", 101 DTB_DIR "bcm2835-rpi-b.dtb", 102 true, 103 }, 104 [0x2] = { 105 "Model A+", 106 DTB_DIR "bcm2835-rpi-a-plus.dtb", 107 false, 108 }, 109 [0x3] = { 110 "Model B+", 111 DTB_DIR "bcm2835-rpi-b-plus.dtb", 112 true, 113 }, 114 [0x4] = { 115 "2 Model B", 116 DTB_DIR "bcm2836-rpi-2-b.dtb", 117 true, 118 }, 119 [0x6] = { 120 "Compute Module", 121 DTB_DIR "bcm2835-rpi-cm.dtb", 122 false, 123 }, 124 [0x8] = { 125 "3 Model B", 126 DTB_DIR "bcm2837-rpi-3-b.dtb", 127 true, 128 }, 129 [0x9] = { 130 "Zero", 131 DTB_DIR "bcm2835-rpi-zero.dtb", 132 false, 133 }, 134 [0xA] = { 135 "Compute Module 3", 136 DTB_DIR "bcm2837-rpi-cm3.dtb", 137 false, 138 }, 139 [0xC] = { 140 "Zero W", 141 DTB_DIR "bcm2835-rpi-zero-w.dtb", 142 false, 143 }, 144 [0xD] = { 145 "3 Model B+", 146 DTB_DIR "bcm2837-rpi-3-b-plus.dtb", 147 true, 148 }, 149 }; 150 151 static const struct rpi_model rpi_models_old_scheme[] = { 152 [0x2] = { 153 "Model B", 154 DTB_DIR "bcm2835-rpi-b.dtb", 155 true, 156 }, 157 [0x3] = { 158 "Model B", 159 DTB_DIR "bcm2835-rpi-b.dtb", 160 true, 161 }, 162 [0x4] = { 163 "Model B rev2", 164 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 165 true, 166 }, 167 [0x5] = { 168 "Model B rev2", 169 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 170 true, 171 }, 172 [0x6] = { 173 "Model B rev2", 174 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 175 true, 176 }, 177 [0x7] = { 178 "Model A", 179 DTB_DIR "bcm2835-rpi-a.dtb", 180 false, 181 }, 182 [0x8] = { 183 "Model A", 184 DTB_DIR "bcm2835-rpi-a.dtb", 185 false, 186 }, 187 [0x9] = { 188 "Model A", 189 DTB_DIR "bcm2835-rpi-a.dtb", 190 false, 191 }, 192 [0xd] = { 193 "Model B rev2", 194 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 195 true, 196 }, 197 [0xe] = { 198 "Model B rev2", 199 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 200 true, 201 }, 202 [0xf] = { 203 "Model B rev2", 204 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 205 true, 206 }, 207 [0x10] = { 208 "Model B+", 209 DTB_DIR "bcm2835-rpi-b-plus.dtb", 210 true, 211 }, 212 [0x11] = { 213 "Compute Module", 214 DTB_DIR "bcm2835-rpi-cm.dtb", 215 false, 216 }, 217 [0x12] = { 218 "Model A+", 219 DTB_DIR "bcm2835-rpi-a-plus.dtb", 220 false, 221 }, 222 [0x13] = { 223 "Model B+", 224 DTB_DIR "bcm2835-rpi-b-plus.dtb", 225 true, 226 }, 227 [0x14] = { 228 "Compute Module", 229 DTB_DIR "bcm2835-rpi-cm.dtb", 230 false, 231 }, 232 [0x15] = { 233 "Model A+", 234 DTB_DIR "bcm2835-rpi-a-plus.dtb", 235 false, 236 }, 237 }; 238 239 static uint32_t revision; 240 static uint32_t rev_scheme; 241 static uint32_t rev_type; 242 static const struct rpi_model *model; 243 244 #ifdef CONFIG_ARM64 245 static struct mm_region bcm2837_mem_map[] = { 246 { 247 .virt = 0x00000000UL, 248 .phys = 0x00000000UL, 249 .size = 0x3f000000UL, 250 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 251 PTE_BLOCK_INNER_SHARE 252 }, { 253 .virt = 0x3f000000UL, 254 .phys = 0x3f000000UL, 255 .size = 0x01000000UL, 256 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 257 PTE_BLOCK_NON_SHARE | 258 PTE_BLOCK_PXN | PTE_BLOCK_UXN 259 }, { 260 /* List terminator */ 261 0, 262 } 263 }; 264 265 struct mm_region *mem_map = bcm2837_mem_map; 266 #endif 267 268 int dram_init(void) 269 { 270 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 271 int ret; 272 273 BCM2835_MBOX_INIT_HDR(msg); 274 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 275 276 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 277 if (ret) { 278 printf("bcm2835: Could not query ARM memory size\n"); 279 return -1; 280 } 281 282 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 283 284 return 0; 285 } 286 287 static void set_fdtfile(void) 288 { 289 const char *fdtfile; 290 291 if (env_get("fdtfile")) 292 return; 293 294 fdtfile = model->fdtfile; 295 env_set("fdtfile", fdtfile); 296 } 297 298 /* 299 * If the firmware provided a valid FDT at boot time, let's expose it in 300 * ${fdt_addr} so it may be passed unmodified to the kernel. 301 */ 302 static void set_fdt_addr(void) 303 { 304 if (env_get("fdt_addr")) 305 return; 306 307 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) 308 return; 309 310 env_set_hex("fdt_addr", fw_dtb_pointer); 311 } 312 313 /* 314 * Prevent relocation from stomping on a firmware provided FDT blob. 315 */ 316 unsigned long board_get_usable_ram_top(unsigned long total_size) 317 { 318 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M) 319 return gd->ram_top; 320 return fw_dtb_pointer & ~0xffff; 321 } 322 323 static void set_usbethaddr(void) 324 { 325 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 326 int ret; 327 328 if (!model->has_onboard_eth) 329 return; 330 331 if (env_get("usbethaddr")) 332 return; 333 334 BCM2835_MBOX_INIT_HDR(msg); 335 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 336 337 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 338 if (ret) { 339 printf("bcm2835: Could not query MAC address\n"); 340 /* Ignore error; not critical */ 341 return; 342 } 343 344 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 345 346 if (!env_get("ethaddr")) 347 env_set("ethaddr", env_get("usbethaddr")); 348 349 return; 350 } 351 352 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 353 static void set_board_info(void) 354 { 355 char s[11]; 356 357 snprintf(s, sizeof(s), "0x%X", revision); 358 env_set("board_revision", s); 359 snprintf(s, sizeof(s), "%d", rev_scheme); 360 env_set("board_rev_scheme", s); 361 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 362 snprintf(s, sizeof(s), "0x%X", rev_type); 363 env_set("board_rev", s); 364 env_set("board_name", model->name); 365 } 366 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 367 368 static void set_serial_number(void) 369 { 370 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 371 int ret; 372 char serial_string[17] = { 0 }; 373 374 if (env_get("serial#")) 375 return; 376 377 BCM2835_MBOX_INIT_HDR(msg); 378 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 379 380 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 381 if (ret) { 382 printf("bcm2835: Could not query board serial\n"); 383 /* Ignore error; not critical */ 384 return; 385 } 386 387 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 388 msg->get_board_serial.body.resp.serial); 389 env_set("serial#", serial_string); 390 } 391 392 int misc_init_r(void) 393 { 394 set_fdt_addr(); 395 set_fdtfile(); 396 set_usbethaddr(); 397 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 398 set_board_info(); 399 #endif 400 set_serial_number(); 401 402 return 0; 403 } 404 405 static void get_board_rev(void) 406 { 407 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 408 int ret; 409 const struct rpi_model *models; 410 uint32_t models_count; 411 412 BCM2835_MBOX_INIT_HDR(msg); 413 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 414 415 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 416 if (ret) { 417 printf("bcm2835: Could not query board revision\n"); 418 /* Ignore error; not critical */ 419 return; 420 } 421 422 /* 423 * For details of old-vs-new scheme, see: 424 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 425 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 426 * (a few posts down) 427 * 428 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 429 * lower byte to use as the board rev: 430 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 431 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 432 */ 433 revision = msg->get_board_rev.body.resp.rev; 434 if (revision & 0x800000) { 435 rev_scheme = 1; 436 rev_type = (revision >> 4) & 0xff; 437 models = rpi_models_new_scheme; 438 models_count = ARRAY_SIZE(rpi_models_new_scheme); 439 } else { 440 rev_scheme = 0; 441 rev_type = revision & 0xff; 442 models = rpi_models_old_scheme; 443 models_count = ARRAY_SIZE(rpi_models_old_scheme); 444 } 445 if (rev_type >= models_count) { 446 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 447 model = &rpi_model_unknown; 448 } else if (!models[rev_type].name) { 449 printf("RPI: Board rev 0x%x unknown\n", rev_type); 450 model = &rpi_model_unknown; 451 } else { 452 model = &models[rev_type]; 453 } 454 455 printf("RPI %s (0x%x)\n", model->name, revision); 456 } 457 458 int board_init(void) 459 { 460 #ifdef CONFIG_HW_WATCHDOG 461 hw_watchdog_init(); 462 #endif 463 464 get_board_rev(); 465 466 gd->bd->bi_boot_params = 0x100; 467 468 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 469 } 470 471 /* 472 * If the firmware passed a device tree use it for U-Boot. 473 */ 474 void *board_fdt_blob_setup(void) 475 { 476 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) 477 return NULL; 478 return (void *)fw_dtb_pointer; 479 } 480 481 int ft_board_setup(void *blob, bd_t *bd) 482 { 483 /* 484 * For now, we simply always add the simplefb DT node. Later, we 485 * should be more intelligent, and e.g. only do this if no enabled DT 486 * node exists for the "real" graphics driver. 487 */ 488 lcd_dt_simplefb_add_node(blob); 489 490 #ifdef CONFIG_EFI_LOADER 491 /* Reserve the spin table */ 492 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0); 493 #endif 494 495 return 0; 496 } 497