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 const 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 .base = 0x00000000UL, 238 .size = 0x3f000000UL, 239 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 240 PTE_BLOCK_INNER_SHARE 241 }, { 242 .base = 0x3f000000UL, 243 .size = 0x01000000UL, 244 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 245 PTE_BLOCK_NON_SHARE | 246 PTE_BLOCK_PXN | PTE_BLOCK_UXN 247 }, { 248 /* List terminator */ 249 0, 250 } 251 }; 252 253 struct mm_region *mem_map = bcm2837_mem_map; 254 #endif 255 256 int dram_init(void) 257 { 258 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); 259 int ret; 260 261 BCM2835_MBOX_INIT_HDR(msg); 262 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); 263 264 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 265 if (ret) { 266 printf("bcm2835: Could not query ARM memory size\n"); 267 return -1; 268 } 269 270 gd->ram_size = msg->get_arm_mem.body.resp.mem_size; 271 272 return 0; 273 } 274 275 static void set_fdtfile(void) 276 { 277 const char *fdtfile; 278 279 if (getenv("fdtfile")) 280 return; 281 282 fdtfile = model->fdtfile; 283 setenv("fdtfile", fdtfile); 284 } 285 286 static void set_usbethaddr(void) 287 { 288 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1); 289 int ret; 290 291 if (!model->has_onboard_eth) 292 return; 293 294 if (getenv("usbethaddr")) 295 return; 296 297 BCM2835_MBOX_INIT_HDR(msg); 298 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); 299 300 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 301 if (ret) { 302 printf("bcm2835: Could not query MAC address\n"); 303 /* Ignore error; not critical */ 304 return; 305 } 306 307 eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac); 308 309 if (!getenv("ethaddr")) 310 setenv("ethaddr", getenv("usbethaddr")); 311 312 return; 313 } 314 315 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 316 static void set_board_info(void) 317 { 318 char s[11]; 319 320 snprintf(s, sizeof(s), "0x%X", revision); 321 setenv("board_revision", s); 322 snprintf(s, sizeof(s), "%d", rev_scheme); 323 setenv("board_rev_scheme", s); 324 /* Can't rename this to board_rev_type since it's an ABI for scripts */ 325 snprintf(s, sizeof(s), "0x%X", rev_type); 326 setenv("board_rev", s); 327 setenv("board_name", model->name); 328 } 329 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ 330 331 static void set_serial_number(void) 332 { 333 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1); 334 int ret; 335 char serial_string[17] = { 0 }; 336 337 if (getenv("serial#")) 338 return; 339 340 BCM2835_MBOX_INIT_HDR(msg); 341 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL); 342 343 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 344 if (ret) { 345 printf("bcm2835: Could not query board serial\n"); 346 /* Ignore error; not critical */ 347 return; 348 } 349 350 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64, 351 msg->get_board_serial.body.resp.serial); 352 setenv("serial#", serial_string); 353 } 354 355 int misc_init_r(void) 356 { 357 set_fdtfile(); 358 set_usbethaddr(); 359 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 360 set_board_info(); 361 #endif 362 set_serial_number(); 363 364 return 0; 365 } 366 367 static int power_on_module(u32 module) 368 { 369 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 370 int ret; 371 372 BCM2835_MBOX_INIT_HDR(msg_pwr); 373 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 374 SET_POWER_STATE); 375 msg_pwr->set_power_state.body.req.device_id = module; 376 msg_pwr->set_power_state.body.req.state = 377 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 378 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 379 380 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 381 &msg_pwr->hdr); 382 if (ret) { 383 printf("bcm2835: Could not set module %u power state\n", 384 module); 385 return -1; 386 } 387 388 return 0; 389 } 390 391 static void get_board_rev(void) 392 { 393 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1); 394 int ret; 395 const struct rpi_model *models; 396 uint32_t models_count; 397 398 BCM2835_MBOX_INIT_HDR(msg); 399 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); 400 401 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); 402 if (ret) { 403 printf("bcm2835: Could not query board revision\n"); 404 /* Ignore error; not critical */ 405 return; 406 } 407 408 /* 409 * For details of old-vs-new scheme, see: 410 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py 411 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282 412 * (a few posts down) 413 * 414 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the 415 * lower byte to use as the board rev: 416 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250 417 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594 418 */ 419 revision = msg->get_board_rev.body.resp.rev; 420 if (revision & 0x800000) { 421 rev_scheme = 1; 422 rev_type = (revision >> 4) & 0xff; 423 models = rpi_models_new_scheme; 424 models_count = ARRAY_SIZE(rpi_models_new_scheme); 425 } else { 426 rev_scheme = 0; 427 rev_type = revision & 0xff; 428 models = rpi_models_old_scheme; 429 models_count = ARRAY_SIZE(rpi_models_old_scheme); 430 } 431 if (rev_type >= models_count) { 432 printf("RPI: Board rev 0x%x outside known range\n", rev_type); 433 model = &rpi_model_unknown; 434 } else if (!models[rev_type].name) { 435 printf("RPI: Board rev 0x%x unknown\n", rev_type); 436 model = &rpi_model_unknown; 437 } else { 438 model = &models[rev_type]; 439 } 440 441 printf("RPI %s (0x%x)\n", model->name, revision); 442 } 443 444 int board_init(void) 445 { 446 get_board_rev(); 447 448 gd->bd->bi_boot_params = 0x100; 449 450 return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); 451 } 452 453 int board_mmc_init(bd_t *bis) 454 { 455 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 456 int ret; 457 458 power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 459 460 BCM2835_MBOX_INIT_HDR(msg_clk); 461 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 462 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 463 464 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 465 if (ret) { 466 printf("bcm2835: Could not query eMMC clock rate\n"); 467 return -1; 468 } 469 470 return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, 471 msg_clk->get_clock_rate.body.resp.rate_hz); 472 } 473 474 int ft_board_setup(void *blob, bd_t *bd) 475 { 476 /* 477 * For now, we simply always add the simplefb DT node. Later, we 478 * should be more intelligent, and e.g. only do this if no enabled DT 479 * node exists for the "real" graphics driver. 480 */ 481 lcd_dt_simplefb_add_node(blob); 482 483 return 0; 484 } 485