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