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