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 static const struct bcm2835_gpio_platdata gpio_platdata = { 29 .base = BCM2835_GPIO_BASE, 30 }; 31 32 U_BOOT_DEVICE(bcm2835_gpios) = { 33 .name = "gpio_bcm2835", 34 .platdata = &gpio_platdata, 35 }; 36 37 #ifdef CONFIG_PL01X_SERIAL 38 static const struct pl01x_serial_platdata serial_platdata = { 39 #ifndef CONFIG_BCM2835 40 .base = 0x3f201000, 41 #else 42 .base = 0x20201000, 43 #endif 44 .type = TYPE_PL011, 45 .skip_init = true, 46 }; 47 48 U_BOOT_DEVICE(bcm2835_serials) = { 49 .name = "serial_pl01x", 50 .platdata = &serial_platdata, 51 }; 52 #else 53 static struct bcm283x_mu_serial_platdata serial_platdata = { 54 .base = 0x3f215040, 55 .clock = 250000000, 56 .skip_init = true, 57 }; 58 59 U_BOOT_DEVICE(bcm2837_serials) = { 60 .name = "serial_bcm283x_mu", 61 .platdata = &serial_platdata, 62 }; 63 #endif 64 65 struct msg_get_arm_mem { 66 struct bcm2835_mbox_hdr hdr; 67 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; 68 u32 end_tag; 69 }; 70 71 struct msg_get_board_rev { 72 struct bcm2835_mbox_hdr hdr; 73 struct bcm2835_mbox_tag_get_board_rev get_board_rev; 74 u32 end_tag; 75 }; 76 77 struct msg_get_board_serial { 78 struct bcm2835_mbox_hdr hdr; 79 struct bcm2835_mbox_tag_get_board_serial get_board_serial; 80 u32 end_tag; 81 }; 82 83 struct msg_get_mac_address { 84 struct bcm2835_mbox_hdr hdr; 85 struct bcm2835_mbox_tag_get_mac_address get_mac_address; 86 u32 end_tag; 87 }; 88 89 struct msg_set_power_state { 90 struct bcm2835_mbox_hdr hdr; 91 struct bcm2835_mbox_tag_set_power_state set_power_state; 92 u32 end_tag; 93 }; 94 95 struct msg_get_clock_rate { 96 struct bcm2835_mbox_hdr hdr; 97 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 98 u32 end_tag; 99 }; 100 101 /* 102 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/ 103 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733 104 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922 105 * 106 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html 107 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi 108 * Foundation stated that the following source was accurate: 109 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision 110 */ 111 struct rpi_model { 112 const char *name; 113 const char *fdtfile; 114 bool has_onboard_eth; 115 }; 116 117 static const struct rpi_model rpi_model_unknown = { 118 "Unknown model", 119 "bcm283x-rpi-other.dtb", 120 false, 121 }; 122 123 static const struct rpi_model rpi_models_new_scheme[] = { 124 [0x4] = { 125 "2 Model B", 126 "bcm2836-rpi-2-b.dtb", 127 true, 128 }, 129 [0x8] = { 130 "3 Model B", 131 "bcm2837-rpi-3-b.dtb", 132 true, 133 }, 134 [0x9] = { 135 "Zero", 136 "bcm2835-rpi-zero.dtb", 137 false, 138 }, 139 }; 140 141 static const struct rpi_model rpi_models_old_scheme[] = { 142 [0x2] = { 143 "Model B", 144 "bcm2835-rpi-b.dtb", 145 true, 146 }, 147 [0x3] = { 148 "Model B", 149 "bcm2835-rpi-b.dtb", 150 true, 151 }, 152 [0x4] = { 153 "Model B rev2", 154 "bcm2835-rpi-b-rev2.dtb", 155 true, 156 }, 157 [0x5] = { 158 "Model B rev2", 159 "bcm2835-rpi-b-rev2.dtb", 160 true, 161 }, 162 [0x6] = { 163 "Model B rev2", 164 "bcm2835-rpi-b-rev2.dtb", 165 true, 166 }, 167 [0x7] = { 168 "Model A", 169 "bcm2835-rpi-a.dtb", 170 false, 171 }, 172 [0x8] = { 173 "Model A", 174 "bcm2835-rpi-a.dtb", 175 false, 176 }, 177 [0x9] = { 178 "Model A", 179 "bcm2835-rpi-a.dtb", 180 false, 181 }, 182 [0xd] = { 183 "Model B rev2", 184 "bcm2835-rpi-b-rev2.dtb", 185 true, 186 }, 187 [0xe] = { 188 "Model B rev2", 189 "bcm2835-rpi-b-rev2.dtb", 190 true, 191 }, 192 [0xf] = { 193 "Model B rev2", 194 "bcm2835-rpi-b-rev2.dtb", 195 true, 196 }, 197 [0x10] = { 198 "Model B+", 199 "bcm2835-rpi-b-plus.dtb", 200 true, 201 }, 202 [0x11] = { 203 "Compute Module", 204 "bcm2835-rpi-cm.dtb", 205 false, 206 }, 207 [0x12] = { 208 "Model A+", 209 "bcm2835-rpi-a-plus.dtb", 210 false, 211 }, 212 [0x13] = { 213 "Model B+", 214 "bcm2835-rpi-b-plus.dtb", 215 true, 216 }, 217 [0x14] = { 218 "Compute Module", 219 "bcm2835-rpi-cm.dtb", 220 false, 221 }, 222 [0x15] = { 223 "Model A+", 224 "bcm2835-rpi-a-plus.dtb", 225 false, 226 }, 227 }; 228 229 static uint32_t revision; 230 static uint32_t rev_scheme; 231 static uint32_t rev_type; 232 static const struct rpi_model *model; 233 234 #ifdef CONFIG_ARM64 235 static struct mm_region bcm2837_mem_map[] = { 236 { 237 .virt = 0x00000000UL, 238 .phys = 0x00000000UL, 239 .size = 0x3f000000UL, 240 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 241 PTE_BLOCK_INNER_SHARE 242 }, { 243 .virt = 0x3f000000UL, 244 .phys = 0x3f000000UL, 245 .size = 0x01000000UL, 246 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 247 PTE_BLOCK_NON_SHARE | 248 PTE_BLOCK_PXN | PTE_BLOCK_UXN 249 }, { 250 /* List terminator */ 251 0, 252 } 253 }; 254 255 struct mm_region *mem_map = bcm2837_mem_map; 256 #endif 257 258 int dram_init(void) 259 { 260 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 261 int ret; 262 263 BCM2835_MBOX_INIT_HDR(msg); 264 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 265 266 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 267 if (ret) { 268 printf("bcm2835: Could not query ARM memory size\n"); 269 return -1; 270 } 271 272 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 273 274 return 0; 275 } 276 277 static void set_fdtfile(void) 278 { 279 const char *fdtfile; 280 281 if (getenv("fdtfile")) 282 return; 283 284 fdtfile = model->fdtfile; 285 setenv("fdtfile", fdtfile); 286 } 287 288 static void set_usbethaddr(void) 289 { 290 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 291 int ret; 292 293 if (!model->has_onboard_eth) 294 return; 295 296 if (getenv("usbethaddr")) 297 return; 298 299 BCM2835_MBOX_INIT_HDR(msg); 300 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 301 302 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 303 if (ret) { 304 printf("bcm2835: Could not query MAC address\n"); 305 /* Ignore error; not critical */ 306 return; 307 } 308 309 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 310 311 if (!getenv("ethaddr")) 312 setenv("ethaddr", getenv("usbethaddr")); 313 314 return; 315 } 316 317 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 318 static void set_board_info(void) 319 { 320 char s[11]; 321 322 snprintf(s, sizeof(s), "0x%X", revision); 323 setenv("board_revision", s); 324 snprintf(s, sizeof(s), "%d", rev_scheme); 325 setenv("board_rev_scheme", s); 326 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 327 snprintf(s, sizeof(s), "0x%X", rev_type); 328 setenv("board_rev", s); 329 setenv("board_name", model->name); 330 } 331 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 332 333 static void set_serial_number(void) 334 { 335 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 336 int ret; 337 char serial_string[17] = { 0 }; 338 339 if (getenv("serial#")) 340 return; 341 342 BCM2835_MBOX_INIT_HDR(msg); 343 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 344 345 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 346 if (ret) { 347 printf("bcm2835: Could not query board serial\n"); 348 /* Ignore error; not critical */ 349 return; 350 } 351 352 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 353 msg->get_board_serial.body.resp.serial); 354 setenv("serial#", serial_string); 355 } 356 357 int misc_init_r(void) 358 { 359 set_fdtfile(); 360 set_usbethaddr(); 361 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 362 set_board_info(); 363 #endif 364 set_serial_number(); 365 366 return 0; 367 } 368 369 static int power_on_module(u32 module) 370 { 371 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 372 int ret; 373 374 BCM2835_MBOX_INIT_HDR(msg_pwr); 375 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 376 SET_POWER_STATE); 377 msg_pwr->set_power_state.body.req.device_id = module; 378 msg_pwr->set_power_state.body.req.state = 379 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 380 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 381 382 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 383 &msg_pwr->hdr); 384 if (ret) { 385 printf("bcm2835: Could not set module %u power state\n", 386 module); 387 return -1; 388 } 389 390 return 0; 391 } 392 393 static void get_board_rev(void) 394 { 395 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 396 int ret; 397 const struct rpi_model *models; 398 uint32_t models_count; 399 400 BCM2835_MBOX_INIT_HDR(msg); 401 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 402 403 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 404 if (ret) { 405 printf("bcm2835: Could not query board revision\n"); 406 /* Ignore error; not critical */ 407 return; 408 } 409 410 /* 411 * For details of old-vs-new scheme, see: 412 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 413 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 414 * (a few posts down) 415 * 416 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 417 * lower byte to use as the board rev: 418 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 419 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 420 */ 421 revision = msg->get_board_rev.body.resp.rev; 422 if (revision & 0x800000) { 423 rev_scheme = 1; 424 rev_type = (revision >> 4) & 0xff; 425 models = rpi_models_new_scheme; 426 models_count = ARRAY_SIZE(rpi_models_new_scheme); 427 } else { 428 rev_scheme = 0; 429 rev_type = revision & 0xff; 430 models = rpi_models_old_scheme; 431 models_count = ARRAY_SIZE(rpi_models_old_scheme); 432 } 433 if (rev_type >= models_count) { 434 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 435 model = &rpi_model_unknown; 436 } else if (!models[rev_type].name) { 437 printf("RPI: Board rev 0x%x unknown\n", rev_type); 438 model = &rpi_model_unknown; 439 } else { 440 model = &models[rev_type]; 441 } 442 443 printf("RPI %s (0x%x)\n", model->name, revision); 444 } 445 446 int board_init(void) 447 { 448 get_board_rev(); 449 450 gd->bd->bi_boot_params = 0x100; 451 452 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 453 } 454 455 #ifndef CONFIG_PL01X_SERIAL 456 static bool rpi_is_serial_active(void) 457 { 458 int serial_gpio = 15; 459 struct udevice *dev; 460 461 /* 462 * The RPi3 disables the mini uart by default. The easiest way to find 463 * out whether it is available is to check if the RX pin is muxed. 464 */ 465 466 if (uclass_first_device(UCLASS_GPIO, &dev) || !dev) 467 return true; 468 469 if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5) 470 return false; 471 472 return true; 473 } 474 #endif 475 476 int board_early_init_f(void) 477 { 478 #ifndef CONFIG_PL01X_SERIAL 479 /* Disable mini-UART I/O if it's not pinmuxed to our pins */ 480 if (!rpi_is_serial_active()) 481 serial_platdata.disabled = true; 482 #endif 483 484 return 0; 485 } 486 487 int board_mmc_init(bd_t *bis) 488 { 489 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 490 int ret; 491 492 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 493 494 BCM2835_MBOX_INIT_HDR(msg_clk); 495 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 496 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 497 498 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 499 if (ret) { 500 printf("bcm2835: Could not query eMMC clock rate\n"); 501 return -1; 502 } 503 504 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 505 msg_clk->get_clock_rate.body.resp.rate_hz); 506 } 507 508 int ft_board_setup(void *blob, bd_t *bd) 509 { 510 /* 511 * For now, we simply always add the simplefb DT node. Later, we 512 * should be more intelligent, and e.g. only do this if no enabled DT 513 * node exists for the "real" graphics driver. 514 */ 515 lcd_dt_simplefb_add_node(blob); 516 517 return 0; 518 } 519