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 <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/sdhci.h> 19 #include <asm/global_data.h> 20 #include <dm/platform_data/serial_pl01x.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 static const struct bcm2835_gpio_platdata gpio_platdata = { 32 .base = BCM2835_GPIO_BASE, 33 }; 34 35 U_BOOT_DEVICE(bcm2835_gpios) = { 36 .name = "gpio_bcm2835", 37 .platdata = &gpio_platdata, 38 }; 39 40 #ifdef CONFIG_PL01X_SERIAL 41 static const struct pl01x_serial_platdata serial_platdata = { 42 #ifndef CONFIG_BCM2835 43 .base = 0x3f201000, 44 #else 45 .base = 0x20201000, 46 #endif 47 .type = TYPE_PL011, 48 .skip_init = true, 49 }; 50 51 U_BOOT_DEVICE(bcm2835_serials) = { 52 .name = "serial_pl01x", 53 .platdata = &serial_platdata, 54 }; 55 #else 56 static struct bcm283x_mu_serial_platdata serial_platdata = { 57 .base = 0x3f215040, 58 .clock = 250000000, 59 .skip_init = true, 60 }; 61 62 U_BOOT_DEVICE(bcm2837_serials) = { 63 .name = "serial_bcm283x_mu", 64 .platdata = &serial_platdata, 65 }; 66 #endif 67 68 struct msg_get_arm_mem { 69 struct bcm2835_mbox_hdr hdr; 70 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 71 u32 end_tag; 72 }; 73 74 struct msg_get_board_rev { 75 struct bcm2835_mbox_hdr hdr; 76 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 77 u32 end_tag; 78 }; 79 80 struct msg_get_board_serial { 81 struct bcm2835_mbox_hdr hdr; 82 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 83 u32 end_tag; 84 }; 85 86 struct msg_get_mac_address { 87 struct bcm2835_mbox_hdr hdr; 88 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 89 u32 end_tag; 90 }; 91 92 struct msg_set_power_state { 93 struct bcm2835_mbox_hdr hdr; 94 struct bcm2835_mbox_tag_set_power_state set_power_state; 95 u32 end_tag; 96 }; 97 98 struct msg_get_clock_rate { 99 struct bcm2835_mbox_hdr hdr; 100 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 101 u32 end_tag; 102 }; 103 104 /* 105 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 106 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 107 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 108 * 109 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 110 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 111 * Foundation stated that the following source was accurate: 112 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 113 */ 114 struct rpi_model { 115 const char *name; 116 const char *fdtfile; 117 bool has_onboard_eth; 118 }; 119 120 static const struct rpi_model rpi_model_unknown = { 121 "Unknown model", 122 "bcm283x-rpi-other.dtb", 123 false, 124 }; 125 126 static const struct rpi_model rpi_models_new_scheme[] = { 127 [0x4] = { 128 "2 Model B", 129 "bcm2836-rpi-2-b.dtb", 130 true, 131 }, 132 [0x8] = { 133 "3 Model B", 134 "bcm2837-rpi-3-b.dtb", 135 true, 136 }, 137 [0x9] = { 138 "Zero", 139 "bcm2835-rpi-zero.dtb", 140 false, 141 }, 142 }; 143 144 static const struct rpi_model rpi_models_old_scheme[] = { 145 [0x2] = { 146 "Model B", 147 "bcm2835-rpi-b.dtb", 148 true, 149 }, 150 [0x3] = { 151 "Model B", 152 "bcm2835-rpi-b.dtb", 153 true, 154 }, 155 [0x4] = { 156 "Model B rev2", 157 "bcm2835-rpi-b-rev2.dtb", 158 true, 159 }, 160 [0x5] = { 161 "Model B rev2", 162 "bcm2835-rpi-b-rev2.dtb", 163 true, 164 }, 165 [0x6] = { 166 "Model B rev2", 167 "bcm2835-rpi-b-rev2.dtb", 168 true, 169 }, 170 [0x7] = { 171 "Model A", 172 "bcm2835-rpi-a.dtb", 173 false, 174 }, 175 [0x8] = { 176 "Model A", 177 "bcm2835-rpi-a.dtb", 178 false, 179 }, 180 [0x9] = { 181 "Model A", 182 "bcm2835-rpi-a.dtb", 183 false, 184 }, 185 [0xd] = { 186 "Model B rev2", 187 "bcm2835-rpi-b-rev2.dtb", 188 true, 189 }, 190 [0xe] = { 191 "Model B rev2", 192 "bcm2835-rpi-b-rev2.dtb", 193 true, 194 }, 195 [0xf] = { 196 "Model B rev2", 197 "bcm2835-rpi-b-rev2.dtb", 198 true, 199 }, 200 [0x10] = { 201 "Model B+", 202 "bcm2835-rpi-b-plus.dtb", 203 true, 204 }, 205 [0x11] = { 206 "Compute Module", 207 "bcm2835-rpi-cm.dtb", 208 false, 209 }, 210 [0x12] = { 211 "Model A+", 212 "bcm2835-rpi-a-plus.dtb", 213 false, 214 }, 215 [0x13] = { 216 "Model B+", 217 "bcm2835-rpi-b-plus.dtb", 218 true, 219 }, 220 [0x14] = { 221 "Compute Module", 222 "bcm2835-rpi-cm.dtb", 223 false, 224 }, 225 [0x15] = { 226 "Model A+", 227 "bcm2835-rpi-a-plus.dtb", 228 false, 229 }, 230 }; 231 232 static uint32_t revision; 233 static uint32_t rev_scheme; 234 static uint32_t rev_type; 235 static const struct rpi_model *model; 236 237 #ifdef CONFIG_ARM64 238 static struct mm_region bcm2837_mem_map[] = { 239 { 240 .virt = 0x00000000UL, 241 .phys = 0x00000000UL, 242 .size = 0x3f000000UL, 243 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 244 PTE_BLOCK_INNER_SHARE 245 }, { 246 .virt = 0x3f000000UL, 247 .phys = 0x3f000000UL, 248 .size = 0x01000000UL, 249 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 250 PTE_BLOCK_NON_SHARE | 251 PTE_BLOCK_PXN | PTE_BLOCK_UXN 252 }, { 253 /* List terminator */ 254 0, 255 } 256 }; 257 258 struct mm_region *mem_map = bcm2837_mem_map; 259 #endif 260 261 int dram_init(void) 262 { 263 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 264 int ret; 265 266 BCM2835_MBOX_INIT_HDR(msg); 267 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 268 269 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 270 if (ret) { 271 printf("bcm2835: Could not query ARM memory size\n"); 272 return -1; 273 } 274 275 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 276 277 return 0; 278 } 279 280 static void set_fdtfile(void) 281 { 282 const char *fdtfile; 283 284 if (getenv("fdtfile")) 285 return; 286 287 fdtfile = model->fdtfile; 288 setenv("fdtfile", fdtfile); 289 } 290 291 /* 292 * If the firmware provided a valid FDT at boot time, let's expose it in 293 * ${fdt_addr} so it may be passed unmodified to the kernel. 294 */ 295 static void set_fdt_addr(void) 296 { 297 if (getenv("fdt_addr")) 298 return; 299 300 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) 301 return; 302 303 setenv_hex("fdt_addr", fw_dtb_pointer); 304 } 305 306 /* 307 * Prevent relocation from stomping on a firmware provided FDT blob. 308 */ 309 unsigned long board_get_usable_ram_top(unsigned long total_size) 310 { 311 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M) 312 return gd->ram_top; 313 return fw_dtb_pointer & ~0xffff; 314 } 315 316 static void set_usbethaddr(void) 317 { 318 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 319 int ret; 320 321 if (!model->has_onboard_eth) 322 return; 323 324 if (getenv("usbethaddr")) 325 return; 326 327 BCM2835_MBOX_INIT_HDR(msg); 328 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 329 330 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 331 if (ret) { 332 printf("bcm2835: Could not query MAC address\n"); 333 /* Ignore error; not critical */ 334 return; 335 } 336 337 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 338 339 if (!getenv("ethaddr")) 340 setenv("ethaddr", getenv("usbethaddr")); 341 342 return; 343 } 344 345 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 346 static void set_board_info(void) 347 { 348 char s[11]; 349 350 snprintf(s, sizeof(s), "0x%X", revision); 351 setenv("board_revision", s); 352 snprintf(s, sizeof(s), "%d", rev_scheme); 353 setenv("board_rev_scheme", s); 354 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 355 snprintf(s, sizeof(s), "0x%X", rev_type); 356 setenv("board_rev", s); 357 setenv("board_name", model->name); 358 } 359 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 360 361 static void set_serial_number(void) 362 { 363 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 364 int ret; 365 char serial_string[17] = { 0 }; 366 367 if (getenv("serial#")) 368 return; 369 370 BCM2835_MBOX_INIT_HDR(msg); 371 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 372 373 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 374 if (ret) { 375 printf("bcm2835: Could not query board serial\n"); 376 /* Ignore error; not critical */ 377 return; 378 } 379 380 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 381 msg->get_board_serial.body.resp.serial); 382 setenv("serial#", serial_string); 383 } 384 385 int misc_init_r(void) 386 { 387 set_fdt_addr(); 388 set_fdtfile(); 389 set_usbethaddr(); 390 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 391 set_board_info(); 392 #endif 393 set_serial_number(); 394 395 return 0; 396 } 397 398 static int power_on_module(u32 module) 399 { 400 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 401 int ret; 402 403 BCM2835_MBOX_INIT_HDR(msg_pwr); 404 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 405 SET_POWER_STATE); 406 msg_pwr->set_power_state.body.req.device_id = module; 407 msg_pwr->set_power_state.body.req.state = 408 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 409 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 410 411 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 412 &msg_pwr->hdr); 413 if (ret) { 414 printf("bcm2835: Could not set module %u power state\n", 415 module); 416 return -1; 417 } 418 419 return 0; 420 } 421 422 static void get_board_rev(void) 423 { 424 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 425 int ret; 426 const struct rpi_model *models; 427 uint32_t models_count; 428 429 BCM2835_MBOX_INIT_HDR(msg); 430 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 431 432 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 433 if (ret) { 434 printf("bcm2835: Could not query board revision\n"); 435 /* Ignore error; not critical */ 436 return; 437 } 438 439 /* 440 * For details of old-vs-new scheme, see: 441 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 442 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 443 * (a few posts down) 444 * 445 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 446 * lower byte to use as the board rev: 447 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 448 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 449 */ 450 revision = msg->get_board_rev.body.resp.rev; 451 if (revision & 0x800000) { 452 rev_scheme = 1; 453 rev_type = (revision >> 4) & 0xff; 454 models = rpi_models_new_scheme; 455 models_count = ARRAY_SIZE(rpi_models_new_scheme); 456 } else { 457 rev_scheme = 0; 458 rev_type = revision & 0xff; 459 models = rpi_models_old_scheme; 460 models_count = ARRAY_SIZE(rpi_models_old_scheme); 461 } 462 if (rev_type >= models_count) { 463 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 464 model = &rpi_model_unknown; 465 } else if (!models[rev_type].name) { 466 printf("RPI: Board rev 0x%x unknown\n", rev_type); 467 model = &rpi_model_unknown; 468 } else { 469 model = &models[rev_type]; 470 } 471 472 printf("RPI %s (0x%x)\n", model->name, revision); 473 } 474 475 int board_init(void) 476 { 477 get_board_rev(); 478 479 gd->bd->bi_boot_params = 0x100; 480 481 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 482 } 483 484 #ifndef CONFIG_PL01X_SERIAL 485 static bool rpi_is_serial_active(void) 486 { 487 int serial_gpio = 15; 488 struct udevice *dev; 489 490 /* 491 * The RPi3 disables the mini uart by default. The easiest way to find 492 * out whether it is available is to check if the RX pin is muxed. 493 */ 494 495 if (uclass_first_device(UCLASS_GPIO, &dev) || !dev) 496 return true; 497 498 if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5) 499 return false; 500 501 return true; 502 } 503 #endif 504 505 int board_early_init_f(void) 506 { 507 #ifndef CONFIG_PL01X_SERIAL 508 /* Disable mini-UART I/O if it's not pinmuxed to our pins */ 509 if (!rpi_is_serial_active()) 510 serial_platdata.disabled = true; 511 #endif 512 513 return 0; 514 } 515 516 int board_mmc_init(bd_t *bis) 517 { 518 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 519 int ret; 520 521 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 522 523 BCM2835_MBOX_INIT_HDR(msg_clk); 524 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 525 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 526 527 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 528 if (ret) { 529 printf("bcm2835: Could not query eMMC clock rate\n"); 530 return -1; 531 } 532 533 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 534 msg_clk->get_clock_rate.body.resp.rate_hz); 535 } 536 537 int ft_board_setup(void *blob, bd_t *bd) 538 { 539 /* 540 * For now, we simply always add the simplefb DT node. Later, we 541 * should be more intelligent, and e.g. only do this if no enabled DT 542 * node exists for the "real" graphics driver. 543 */ 544 lcd_dt_simplefb_add_node(blob); 545 546 return 0; 547 } 548