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/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 26 DECLARE_GLOBAL_DATA_PTR; 27 28 /* From lowlevel_init.S */ 29 extern unsigned long fw_dtb_pointer; 30 31 32 struct msg_get_arm_mem { 33 struct bcm2835_mbox_hdr hdr; 34 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 35 u32 end_tag; 36 }; 37 38 struct msg_get_board_rev { 39 struct bcm2835_mbox_hdr hdr; 40 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 41 u32 end_tag; 42 }; 43 44 struct msg_get_board_serial { 45 struct bcm2835_mbox_hdr hdr; 46 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 47 u32 end_tag; 48 }; 49 50 struct msg_get_mac_address { 51 struct bcm2835_mbox_hdr hdr; 52 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 53 u32 end_tag; 54 }; 55 56 struct msg_set_power_state { 57 struct bcm2835_mbox_hdr hdr; 58 struct bcm2835_mbox_tag_set_power_state set_power_state; 59 u32 end_tag; 60 }; 61 62 struct msg_get_clock_rate { 63 struct bcm2835_mbox_hdr hdr; 64 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 65 u32 end_tag; 66 }; 67 68 /* 69 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 70 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 71 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 72 * 73 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 74 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 75 * Foundation stated that the following source was accurate: 76 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 77 */ 78 struct rpi_model { 79 const char *name; 80 const char *fdtfile; 81 bool has_onboard_eth; 82 }; 83 84 static const struct rpi_model rpi_model_unknown = { 85 "Unknown model", 86 "bcm283x-rpi-other.dtb", 87 false, 88 }; 89 90 static const struct rpi_model rpi_models_new_scheme[] = { 91 [0x4] = { 92 "2 Model B", 93 "bcm2836-rpi-2-b.dtb", 94 true, 95 }, 96 [0x8] = { 97 "3 Model B", 98 "bcm2837-rpi-3-b.dtb", 99 true, 100 }, 101 [0x9] = { 102 "Zero", 103 "bcm2835-rpi-zero.dtb", 104 false, 105 }, 106 }; 107 108 static const struct rpi_model rpi_models_old_scheme[] = { 109 [0x2] = { 110 "Model B", 111 "bcm2835-rpi-b.dtb", 112 true, 113 }, 114 [0x3] = { 115 "Model B", 116 "bcm2835-rpi-b.dtb", 117 true, 118 }, 119 [0x4] = { 120 "Model B rev2", 121 "bcm2835-rpi-b-rev2.dtb", 122 true, 123 }, 124 [0x5] = { 125 "Model B rev2", 126 "bcm2835-rpi-b-rev2.dtb", 127 true, 128 }, 129 [0x6] = { 130 "Model B rev2", 131 "bcm2835-rpi-b-rev2.dtb", 132 true, 133 }, 134 [0x7] = { 135 "Model A", 136 "bcm2835-rpi-a.dtb", 137 false, 138 }, 139 [0x8] = { 140 "Model A", 141 "bcm2835-rpi-a.dtb", 142 false, 143 }, 144 [0x9] = { 145 "Model A", 146 "bcm2835-rpi-a.dtb", 147 false, 148 }, 149 [0xd] = { 150 "Model B rev2", 151 "bcm2835-rpi-b-rev2.dtb", 152 true, 153 }, 154 [0xe] = { 155 "Model B rev2", 156 "bcm2835-rpi-b-rev2.dtb", 157 true, 158 }, 159 [0xf] = { 160 "Model B rev2", 161 "bcm2835-rpi-b-rev2.dtb", 162 true, 163 }, 164 [0x10] = { 165 "Model B+", 166 "bcm2835-rpi-b-plus.dtb", 167 true, 168 }, 169 [0x11] = { 170 "Compute Module", 171 "bcm2835-rpi-cm.dtb", 172 false, 173 }, 174 [0x12] = { 175 "Model A+", 176 "bcm2835-rpi-a-plus.dtb", 177 false, 178 }, 179 [0x13] = { 180 "Model B+", 181 "bcm2835-rpi-b-plus.dtb", 182 true, 183 }, 184 [0x14] = { 185 "Compute Module", 186 "bcm2835-rpi-cm.dtb", 187 false, 188 }, 189 [0x15] = { 190 "Model A+", 191 "bcm2835-rpi-a-plus.dtb", 192 false, 193 }, 194 }; 195 196 static uint32_t revision; 197 static uint32_t rev_scheme; 198 static uint32_t rev_type; 199 static const struct rpi_model *model; 200 201 #ifdef CONFIG_ARM64 202 static struct mm_region bcm2837_mem_map[] = { 203 { 204 .virt = 0x00000000UL, 205 .phys = 0x00000000UL, 206 .size = 0x3f000000UL, 207 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 208 PTE_BLOCK_INNER_SHARE 209 }, { 210 .virt = 0x3f000000UL, 211 .phys = 0x3f000000UL, 212 .size = 0x01000000UL, 213 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 214 PTE_BLOCK_NON_SHARE | 215 PTE_BLOCK_PXN | PTE_BLOCK_UXN 216 }, { 217 /* List terminator */ 218 0, 219 } 220 }; 221 222 struct mm_region *mem_map = bcm2837_mem_map; 223 #endif 224 225 int dram_init(void) 226 { 227 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 228 int ret; 229 230 BCM2835_MBOX_INIT_HDR(msg); 231 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 232 233 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 234 if (ret) { 235 printf("bcm2835: Could not query ARM memory size\n"); 236 return -1; 237 } 238 239 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 240 241 return 0; 242 } 243 244 static void set_fdtfile(void) 245 { 246 const char *fdtfile; 247 248 if (getenv("fdtfile")) 249 return; 250 251 fdtfile = model->fdtfile; 252 setenv("fdtfile", fdtfile); 253 } 254 255 /* 256 * If the firmware provided a valid FDT at boot time, let's expose it in 257 * ${fdt_addr} so it may be passed unmodified to the kernel. 258 */ 259 static void set_fdt_addr(void) 260 { 261 if (getenv("fdt_addr")) 262 return; 263 264 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) 265 return; 266 267 setenv_hex("fdt_addr", fw_dtb_pointer); 268 } 269 270 /* 271 * Prevent relocation from stomping on a firmware provided FDT blob. 272 */ 273 unsigned long board_get_usable_ram_top(unsigned long total_size) 274 { 275 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M) 276 return gd->ram_top; 277 return fw_dtb_pointer & ~0xffff; 278 } 279 280 static void set_usbethaddr(void) 281 { 282 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 283 int ret; 284 285 if (!model->has_onboard_eth) 286 return; 287 288 if (getenv("usbethaddr")) 289 return; 290 291 BCM2835_MBOX_INIT_HDR(msg); 292 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 293 294 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 295 if (ret) { 296 printf("bcm2835: Could not query MAC address\n"); 297 /* Ignore error; not critical */ 298 return; 299 } 300 301 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 302 303 if (!getenv("ethaddr")) 304 setenv("ethaddr", getenv("usbethaddr")); 305 306 return; 307 } 308 309 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 310 static void set_board_info(void) 311 { 312 char s[11]; 313 314 snprintf(s, sizeof(s), "0x%X", revision); 315 setenv("board_revision", s); 316 snprintf(s, sizeof(s), "%d", rev_scheme); 317 setenv("board_rev_scheme", s); 318 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 319 snprintf(s, sizeof(s), "0x%X", rev_type); 320 setenv("board_rev", s); 321 setenv("board_name", model->name); 322 } 323 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 324 325 static void set_serial_number(void) 326 { 327 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 328 int ret; 329 char serial_string[17] = { 0 }; 330 331 if (getenv("serial#")) 332 return; 333 334 BCM2835_MBOX_INIT_HDR(msg); 335 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 336 337 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 338 if (ret) { 339 printf("bcm2835: Could not query board serial\n"); 340 /* Ignore error; not critical */ 341 return; 342 } 343 344 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 345 msg->get_board_serial.body.resp.serial); 346 setenv("serial#", serial_string); 347 } 348 349 int misc_init_r(void) 350 { 351 set_fdt_addr(); 352 set_fdtfile(); 353 set_usbethaddr(); 354 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 355 set_board_info(); 356 #endif 357 set_serial_number(); 358 359 return 0; 360 } 361 362 static int power_on_module(u32 module) 363 { 364 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 365 int ret; 366 367 BCM2835_MBOX_INIT_HDR(msg_pwr); 368 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 369 SET_POWER_STATE); 370 msg_pwr->set_power_state.body.req.device_id = module; 371 msg_pwr->set_power_state.body.req.state = 372 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 373 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 374 375 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 376 &msg_pwr->hdr); 377 if (ret) { 378 printf("bcm2835: Could not set module %u power state\n", 379 module); 380 return -1; 381 } 382 383 return 0; 384 } 385 386 static void get_board_rev(void) 387 { 388 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 389 int ret; 390 const struct rpi_model *models; 391 uint32_t models_count; 392 393 BCM2835_MBOX_INIT_HDR(msg); 394 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 395 396 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 397 if (ret) { 398 printf("bcm2835: Could not query board revision\n"); 399 /* Ignore error; not critical */ 400 return; 401 } 402 403 /* 404 * For details of old-vs-new scheme, see: 405 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 406 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 407 * (a few posts down) 408 * 409 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 410 * lower byte to use as the board rev: 411 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 412 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 413 */ 414 revision = msg->get_board_rev.body.resp.rev; 415 if (revision & 0x800000) { 416 rev_scheme = 1; 417 rev_type = (revision >> 4) & 0xff; 418 models = rpi_models_new_scheme; 419 models_count = ARRAY_SIZE(rpi_models_new_scheme); 420 } else { 421 rev_scheme = 0; 422 rev_type = revision & 0xff; 423 models = rpi_models_old_scheme; 424 models_count = ARRAY_SIZE(rpi_models_old_scheme); 425 } 426 if (rev_type >= models_count) { 427 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 428 model = &rpi_model_unknown; 429 } else if (!models[rev_type].name) { 430 printf("RPI: Board rev 0x%x unknown\n", rev_type); 431 model = &rpi_model_unknown; 432 } else { 433 model = &models[rev_type]; 434 } 435 436 printf("RPI %s (0x%x)\n", model->name, revision); 437 } 438 439 #ifndef CONFIG_PL01X_SERIAL 440 static bool rpi_is_serial_active(void) 441 { 442 int serial_gpio = 15; 443 struct udevice *dev; 444 445 /* 446 * The RPi3 disables the mini uart by default. The easiest way to find 447 * out whether it is available is to check if the RX pin is muxed. 448 */ 449 450 if (uclass_first_device(UCLASS_GPIO, &dev) || !dev) 451 return true; 452 453 if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5) 454 return false; 455 456 return true; 457 } 458 459 /* Disable mini-UART I/O if it's not pinmuxed to our pins. 460 * The firmware only enables it if explicitly done in config.txt: enable_uart=1 461 */ 462 static void rpi_disable_inactive_uart(void) 463 { 464 struct udevice *dev; 465 struct bcm283x_mu_serial_platdata *plat; 466 467 if (uclass_get_device_by_driver(UCLASS_SERIAL, 468 DM_GET_DRIVER(serial_bcm283x_mu), 469 &dev) || !dev) 470 return; 471 472 if (!rpi_is_serial_active()) { 473 plat = dev_get_platdata(dev); 474 plat->disabled = true; 475 } 476 } 477 #endif 478 479 int board_init(void) 480 { 481 #ifndef CONFIG_PL01X_SERIAL 482 rpi_disable_inactive_uart(); 483 #endif 484 485 get_board_rev(); 486 487 gd->bd->bi_boot_params = 0x100; 488 489 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 490 } 491 492 int board_mmc_init(bd_t *bis) 493 { 494 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 495 int ret; 496 497 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 498 499 BCM2835_MBOX_INIT_HDR(msg_clk); 500 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 501 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 502 503 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 504 if (ret) { 505 printf("bcm2835: Could not query eMMC clock rate\n"); 506 return -1; 507 } 508 509 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 510 msg_clk->get_clock_rate.body.resp.rate_hz); 511 } 512 513 int ft_board_setup(void *blob, bd_t *bd) 514 { 515 /* 516 * For now, we simply always add the simplefb DT node. Later, we 517 * should be more intelligent, and e.g. only do this if no enabled DT 518 * node exists for the "real" graphics driver. 519 */ 520 lcd_dt_simplefb_add_node(blob); 521 522 #ifdef CONFIG_EFI_LOADER 523 /* Reserve the spin table */ 524 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0); 525 #endif 526 527 return 0; 528 } 529