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 <environment.h> 12 #include <efi_loader.h> 13 #include <fdt_support.h> 14 #include <fdt_simplefb.h> 15 #include <lcd.h> 16 #include <memalign.h> 17 #include <mmc.h> 18 #include <asm/gpio.h> 19 #include <asm/arch/mbox.h> 20 #include <asm/arch/msg.h> 21 #include <asm/arch/sdhci.h> 22 #include <asm/global_data.h> 23 #include <dm/platform_data/serial_bcm283x_mu.h> 24 #ifdef CONFIG_ARM64 25 #include <asm/armv8/mmu.h> 26 #endif 27 #include <watchdog.h> 28 #include <dm/pinctrl.h> 29 30 DECLARE_GLOBAL_DATA_PTR; 31 32 /* From lowlevel_init.S */ 33 extern unsigned long fw_dtb_pointer; 34 35 /* TODO(sjg@chromium.org): Move these to the msg.c file */ 36 struct msg_get_arm_mem { 37 struct bcm2835_mbox_hdr hdr; 38 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 39 u32 end_tag; 40 }; 41 42 struct msg_get_board_rev { 43 struct bcm2835_mbox_hdr hdr; 44 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 45 u32 end_tag; 46 }; 47 48 struct msg_get_board_serial { 49 struct bcm2835_mbox_hdr hdr; 50 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 51 u32 end_tag; 52 }; 53 54 struct msg_get_mac_address { 55 struct bcm2835_mbox_hdr hdr; 56 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 57 u32 end_tag; 58 }; 59 60 struct msg_get_clock_rate { 61 struct bcm2835_mbox_hdr hdr; 62 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 63 u32 end_tag; 64 }; 65 66 #ifdef CONFIG_ARM64 67 #define DTB_DIR "broadcom/" 68 #else 69 #define DTB_DIR "" 70 #endif 71 72 /* 73 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 74 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 75 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 76 * 77 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 78 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 79 * Foundation stated that the following source was accurate: 80 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 81 */ 82 struct rpi_model { 83 const char *name; 84 const char *fdtfile; 85 bool has_onboard_eth; 86 }; 87 88 static const struct rpi_model rpi_model_unknown = { 89 "Unknown model", 90 DTB_DIR "bcm283x-rpi-other.dtb", 91 false, 92 }; 93 94 static const struct rpi_model rpi_models_new_scheme[] = { 95 [0x0] = { 96 "Model A", 97 DTB_DIR "bcm2835-rpi-a.dtb", 98 false, 99 }, 100 [0x1] = { 101 "Model B", 102 DTB_DIR "bcm2835-rpi-b.dtb", 103 true, 104 }, 105 [0x2] = { 106 "Model A+", 107 DTB_DIR "bcm2835-rpi-a-plus.dtb", 108 false, 109 }, 110 [0x3] = { 111 "Model B+", 112 DTB_DIR "bcm2835-rpi-b-plus.dtb", 113 true, 114 }, 115 [0x4] = { 116 "2 Model B", 117 DTB_DIR "bcm2836-rpi-2-b.dtb", 118 true, 119 }, 120 [0x6] = { 121 "Compute Module", 122 DTB_DIR "bcm2835-rpi-cm.dtb", 123 false, 124 }, 125 [0x8] = { 126 "3 Model B", 127 DTB_DIR "bcm2837-rpi-3-b.dtb", 128 true, 129 }, 130 [0x9] = { 131 "Zero", 132 DTB_DIR "bcm2835-rpi-zero.dtb", 133 false, 134 }, 135 [0xA] = { 136 "Compute Module 3", 137 DTB_DIR "bcm2837-rpi-cm3.dtb", 138 false, 139 }, 140 [0xC] = { 141 "Zero W", 142 DTB_DIR "bcm2835-rpi-zero-w.dtb", 143 false, 144 }, 145 [0xD] = { 146 "3 Model B+", 147 DTB_DIR "bcm2837-rpi-3-b-plus.dtb", 148 true, 149 }, 150 }; 151 152 static const struct rpi_model rpi_models_old_scheme[] = { 153 [0x2] = { 154 "Model B", 155 DTB_DIR "bcm2835-rpi-b.dtb", 156 true, 157 }, 158 [0x3] = { 159 "Model B", 160 DTB_DIR "bcm2835-rpi-b.dtb", 161 true, 162 }, 163 [0x4] = { 164 "Model B rev2", 165 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 166 true, 167 }, 168 [0x5] = { 169 "Model B rev2", 170 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 171 true, 172 }, 173 [0x6] = { 174 "Model B rev2", 175 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 176 true, 177 }, 178 [0x7] = { 179 "Model A", 180 DTB_DIR "bcm2835-rpi-a.dtb", 181 false, 182 }, 183 [0x8] = { 184 "Model A", 185 DTB_DIR "bcm2835-rpi-a.dtb", 186 false, 187 }, 188 [0x9] = { 189 "Model A", 190 DTB_DIR "bcm2835-rpi-a.dtb", 191 false, 192 }, 193 [0xd] = { 194 "Model B rev2", 195 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 196 true, 197 }, 198 [0xe] = { 199 "Model B rev2", 200 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 201 true, 202 }, 203 [0xf] = { 204 "Model B rev2", 205 DTB_DIR "bcm2835-rpi-b-rev2.dtb", 206 true, 207 }, 208 [0x10] = { 209 "Model B+", 210 DTB_DIR "bcm2835-rpi-b-plus.dtb", 211 true, 212 }, 213 [0x11] = { 214 "Compute Module", 215 DTB_DIR "bcm2835-rpi-cm.dtb", 216 false, 217 }, 218 [0x12] = { 219 "Model A+", 220 DTB_DIR "bcm2835-rpi-a-plus.dtb", 221 false, 222 }, 223 [0x13] = { 224 "Model B+", 225 DTB_DIR "bcm2835-rpi-b-plus.dtb", 226 true, 227 }, 228 [0x14] = { 229 "Compute Module", 230 DTB_DIR "bcm2835-rpi-cm.dtb", 231 false, 232 }, 233 [0x15] = { 234 "Model A+", 235 DTB_DIR "bcm2835-rpi-a-plus.dtb", 236 false, 237 }, 238 }; 239 240 static uint32_t revision; 241 static uint32_t rev_scheme; 242 static uint32_t rev_type; 243 static const struct rpi_model *model; 244 245 #ifdef CONFIG_ARM64 246 static struct mm_region bcm2837_mem_map[] = { 247 { 248 .virt = 0x00000000UL, 249 .phys = 0x00000000UL, 250 .size = 0x3f000000UL, 251 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 252 PTE_BLOCK_INNER_SHARE 253 }, { 254 .virt = 0x3f000000UL, 255 .phys = 0x3f000000UL, 256 .size = 0x01000000UL, 257 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 258 PTE_BLOCK_NON_SHARE | 259 PTE_BLOCK_PXN | PTE_BLOCK_UXN 260 }, { 261 /* List terminator */ 262 0, 263 } 264 }; 265 266 struct mm_region *mem_map = bcm2837_mem_map; 267 #endif 268 269 int dram_init(void) 270 { 271 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 272 int ret; 273 274 BCM2835_MBOX_INIT_HDR(msg); 275 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 276 277 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 278 if (ret) { 279 printf("bcm2835: Could not query ARM memory size\n"); 280 return -1; 281 } 282 283 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 284 285 return 0; 286 } 287 288 static void set_fdtfile(void) 289 { 290 const char *fdtfile; 291 292 if (env_get("fdtfile")) 293 return; 294 295 fdtfile = model->fdtfile; 296 env_set("fdtfile", fdtfile); 297 } 298 299 /* 300 * If the firmware provided a valid FDT at boot time, let's expose it in 301 * ${fdt_addr} so it may be passed unmodified to the kernel. 302 */ 303 static void set_fdt_addr(void) 304 { 305 if (env_get("fdt_addr")) 306 return; 307 308 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) 309 return; 310 311 env_set_hex("fdt_addr", fw_dtb_pointer); 312 } 313 314 /* 315 * Prevent relocation from stomping on a firmware provided FDT blob. 316 */ 317 unsigned long board_get_usable_ram_top(unsigned long total_size) 318 { 319 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M) 320 return gd->ram_top; 321 return fw_dtb_pointer & ~0xffff; 322 } 323 324 static void set_usbethaddr(void) 325 { 326 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 327 int ret; 328 329 if (!model->has_onboard_eth) 330 return; 331 332 if (env_get("usbethaddr")) 333 return; 334 335 BCM2835_MBOX_INIT_HDR(msg); 336 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 337 338 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 339 if (ret) { 340 printf("bcm2835: Could not query MAC address\n"); 341 /* Ignore error; not critical */ 342 return; 343 } 344 345 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 346 347 if (!env_get("ethaddr")) 348 env_set("ethaddr", env_get("usbethaddr")); 349 350 return; 351 } 352 353 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 354 static void set_board_info(void) 355 { 356 char s[11]; 357 358 snprintf(s, sizeof(s), "0x%X", revision); 359 env_set("board_revision", s); 360 snprintf(s, sizeof(s), "%d", rev_scheme); 361 env_set("board_rev_scheme", s); 362 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 363 snprintf(s, sizeof(s), "0x%X", rev_type); 364 env_set("board_rev", s); 365 env_set("board_name", model->name); 366 } 367 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 368 369 static void set_serial_number(void) 370 { 371 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 372 int ret; 373 char serial_string[17] = { 0 }; 374 375 if (env_get("serial#")) 376 return; 377 378 BCM2835_MBOX_INIT_HDR(msg); 379 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 380 381 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 382 if (ret) { 383 printf("bcm2835: Could not query board serial\n"); 384 /* Ignore error; not critical */ 385 return; 386 } 387 388 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 389 msg->get_board_serial.body.resp.serial); 390 env_set("serial#", serial_string); 391 } 392 393 int misc_init_r(void) 394 { 395 set_fdt_addr(); 396 set_fdtfile(); 397 set_usbethaddr(); 398 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 399 set_board_info(); 400 #endif 401 set_serial_number(); 402 403 return 0; 404 } 405 406 static void get_board_rev(void) 407 { 408 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 409 int ret; 410 const struct rpi_model *models; 411 uint32_t models_count; 412 413 BCM2835_MBOX_INIT_HDR(msg); 414 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 415 416 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 417 if (ret) { 418 printf("bcm2835: Could not query board revision\n"); 419 /* Ignore error; not critical */ 420 return; 421 } 422 423 /* 424 * For details of old-vs-new scheme, see: 425 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 426 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 427 * (a few posts down) 428 * 429 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 430 * lower byte to use as the board rev: 431 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 432 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 433 */ 434 revision = msg->get_board_rev.body.resp.rev; 435 if (revision & 0x800000) { 436 rev_scheme = 1; 437 rev_type = (revision >> 4) & 0xff; 438 models = rpi_models_new_scheme; 439 models_count = ARRAY_SIZE(rpi_models_new_scheme); 440 } else { 441 rev_scheme = 0; 442 rev_type = revision & 0xff; 443 models = rpi_models_old_scheme; 444 models_count = ARRAY_SIZE(rpi_models_old_scheme); 445 } 446 if (rev_type >= models_count) { 447 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 448 model = &rpi_model_unknown; 449 } else if (!models[rev_type].name) { 450 printf("RPI: Board rev 0x%x unknown\n", rev_type); 451 model = &rpi_model_unknown; 452 } else { 453 model = &models[rev_type]; 454 } 455 456 printf("RPI %s (0x%x)\n", model->name, revision); 457 } 458 459 int board_init(void) 460 { 461 #ifdef CONFIG_HW_WATCHDOG 462 hw_watchdog_init(); 463 #endif 464 465 get_board_rev(); 466 467 gd->bd->bi_boot_params = 0x100; 468 469 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 470 } 471 472 /* 473 * If the firmware passed a device tree use it for U-Boot. 474 */ 475 void *board_fdt_blob_setup(void) 476 { 477 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) 478 return NULL; 479 return (void *)fw_dtb_pointer; 480 } 481 482 int ft_board_setup(void *blob, bd_t *bd) 483 { 484 /* 485 * For now, we simply always add the simplefb DT node. Later, we 486 * should be more intelligent, and e.g. only do this if no enabled DT 487 * node exists for the "real" graphics driver. 488 */ 489 lcd_dt_simplefb_add_node(blob); 490 491 #ifdef CONFIG_EFI_LOADER 492 /* Reserve the spin table */ 493 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0); 494 #endif 495 496 return 0; 497 } 498