board/raspberrypi/rpi/rpi.c

   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         [0x0] = {
  95                 "Model A",
  96                 DTB_DIR "bcm2835-rpi-a.dtb",
  97                 false,
  98         },
  99         [0x1] = {
 100                 "Model B",
 101                 DTB_DIR "bcm2835-rpi-b.dtb",
 102                 true,
 103         },
 104         [0x2] = {
 105                 "Model A+",
 106                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 107                 false,
 108         },
 109         [0x3] = {
 110                 "Model B+",
 111                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 112                 true,
 113         },
 114         [0x4] = {
 115                 "2 Model B",
 116                 DTB_DIR "bcm2836-rpi-2-b.dtb",
 117                 true,
 118         },
 119         [0x6] = {
 120                 "Compute Module",
 121                 DTB_DIR "bcm2835-rpi-cm.dtb",
 122                 false,
 123         },
 124         [0x8] = {
 125                 "3 Model B",
 126                 DTB_DIR "bcm2837-rpi-3-b.dtb",
 127                 true,
 128         },
 129         [0x9] = {
 130                 "Zero",
 131                 DTB_DIR "bcm2835-rpi-zero.dtb",
 132                 false,
 133         },
 134         [0xA] = {
 135                 "Compute Module 3",
 136                 DTB_DIR "bcm2837-rpi-cm3.dtb",
 137                 false,
 138         },
 139         [0xC] = {
 140                 "Zero W",
 141                 DTB_DIR "bcm2835-rpi-zero-w.dtb",
 142                 false,
 143         },
 144         [0xD] = {
 145                 "3 Model B+",
 146                 DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
 147                 true,
 148         },
 149 };
 150
 151 static const struct rpi_model rpi_models_old_scheme[] = {
 152         [0x2] = {
 153                 "Model B",
 154                 DTB_DIR "bcm2835-rpi-b.dtb",
 155                 true,
 156         },
 157         [0x3] = {
 158                 "Model B",
 159                 DTB_DIR "bcm2835-rpi-b.dtb",
 160                 true,
 161         },
 162         [0x4] = {
 163                 "Model B rev2",
 164                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 165                 true,
 166         },
 167         [0x5] = {
 168                 "Model B rev2",
 169                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 170                 true,
 171         },
 172         [0x6] = {
 173                 "Model B rev2",
 174                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 175                 true,
 176         },
 177         [0x7] = {
 178                 "Model A",
 179                 DTB_DIR "bcm2835-rpi-a.dtb",
 180                 false,
 181         },
 182         [0x8] = {
 183                 "Model A",
 184                 DTB_DIR "bcm2835-rpi-a.dtb",
 185                 false,
 186         },
 187         [0x9] = {
 188                 "Model A",
 189                 DTB_DIR "bcm2835-rpi-a.dtb",
 190                 false,
 191         },
 192         [0xd] = {
 193                 "Model B rev2",
 194                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 195                 true,
 196         },
 197         [0xe] = {
 198                 "Model B rev2",
 199                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 200                 true,
 201         },
 202         [0xf] = {
 203                 "Model B rev2",
 204                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 205                 true,
 206         },
 207         [0x10] = {
 208                 "Model B+",
 209                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 210                 true,
 211         },
 212         [0x11] = {
 213                 "Compute Module",
 214                 DTB_DIR "bcm2835-rpi-cm.dtb",
 215                 false,
 216         },
 217         [0x12] = {
 218                 "Model A+",
 219                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 220                 false,
 221         },
 222         [0x13] = {
 223                 "Model B+",
 224                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 225                 true,
 226         },
 227         [0x14] = {
 228                 "Compute Module",
 229                 DTB_DIR "bcm2835-rpi-cm.dtb",
 230                 false,
 231         },
 232         [0x15] = {
 233                 "Model A+",
 234                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 235                 false,
 236         },
 237 };
 238
 239 static uint32_t revision;
 240 static uint32_t rev_scheme;
 241 static uint32_t rev_type;
 242 static const struct rpi_model *model;
 243
 244 #ifdef CONFIG_ARM64
 245 static struct mm_region bcm2837_mem_map[] = {
 246         {
 247                 .virt = 0x00000000UL,
 248                 .phys = 0x00000000UL,
 249                 .size = 0x3f000000UL,
 250                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 251                          PTE_BLOCK_INNER_SHARE
 252         }, {
 253                 .virt = 0x3f000000UL,
 254                 .phys = 0x3f000000UL,
 255                 .size = 0x01000000UL,
 256                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 257                          PTE_BLOCK_NON_SHARE |
 258                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 259         }, {
 260                 /* List terminator */
 261                 0,
 262         }
 263 };
 264
 265 struct mm_region *mem_map = bcm2837_mem_map;
 266 #endif
 267
 268 int dram_init(void)
 269 {
 270         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 271         int ret;
 272
 273         BCM2835_MBOX_INIT_HDR(msg);
 274         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 275
 276         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 277         if (ret) {
 278                 printf("bcm2835: Could not query ARM memory size\n");
 279                 return -1;
 280         }
 281
 282         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 283
 284         return 0;
 285 }
 286
 287 static void set_fdtfile(void)
 288 {
 289         const char *fdtfile;
 290
 291         if (env_get("fdtfile"))
 292                 return;
 293
 294         fdtfile = model->fdtfile;
 295         env_set("fdtfile", fdtfile);
 296 }
 297
 298 /*
 299  * If the firmware provided a valid FDT at boot time, let's expose it in
 300  * ${fdt_addr} so it may be passed unmodified to the kernel.
 301  */
 302 static void set_fdt_addr(void)
 303 {
 304         if (env_get("fdt_addr"))
 305                 return;
 306
 307         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 308                 return;
 309
 310         env_set_hex("fdt_addr", fw_dtb_pointer);
 311 }
 312
 313 /*
 314  * Prevent relocation from stomping on a firmware provided FDT blob.
 315  */
 316 unsigned long board_get_usable_ram_top(unsigned long total_size)
 317 {
 318         if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 319                 return gd->ram_top;
 320         return fw_dtb_pointer & ~0xffff;
 321 }
 322
 323 static void set_usbethaddr(void)
 324 {
 325         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 326         int ret;
 327
 328         if (!model->has_onboard_eth)
 329                 return;
 330
 331         if (env_get("usbethaddr"))
 332                 return;
 333
 334         BCM2835_MBOX_INIT_HDR(msg);
 335         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 336
 337         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 338         if (ret) {
 339                 printf("bcm2835: Could not query MAC address\n");
 340                 /* Ignore error; not critical */
 341                 return;
 342         }
 343
 344         eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 345
 346         if (!env_get("ethaddr"))
 347                 env_set("ethaddr", env_get("usbethaddr"));
 348
 349         return;
 350 }
 351
 352 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 353 static void set_board_info(void)
 354 {
 355         char s[11];
 356
 357         snprintf(s, sizeof(s), "0x%X", revision);
 358         env_set("board_revision", s);
 359         snprintf(s, sizeof(s), "%d", rev_scheme);
 360         env_set("board_rev_scheme", s);
 361         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 362         snprintf(s, sizeof(s), "0x%X", rev_type);
 363         env_set("board_rev", s);
 364         env_set("board_name", model->name);
 365 }
 366 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 367
 368 static void set_serial_number(void)
 369 {
 370         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 371         int ret;
 372         char serial_string[17] = { 0 };
 373
 374         if (env_get("serial#"))
 375                 return;
 376
 377         BCM2835_MBOX_INIT_HDR(msg);
 378         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 379
 380         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 381         if (ret) {
 382                 printf("bcm2835: Could not query board serial\n");
 383                 /* Ignore error; not critical */
 384                 return;
 385         }
 386
 387         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 388                  msg->get_board_serial.body.resp.serial);
 389         env_set("serial#", serial_string);
 390 }
 391
 392 int misc_init_r(void)
 393 {
 394         set_fdt_addr();
 395         set_fdtfile();
 396         set_usbethaddr();
 397 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 398         set_board_info();
 399 #endif
 400         set_serial_number();
 401
 402         return 0;
 403 }
 404
 405 static void get_board_rev(void)
 406 {
 407         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 408         int ret;
 409         const struct rpi_model *models;
 410         uint32_t models_count;
 411
 412         BCM2835_MBOX_INIT_HDR(msg);
 413         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 414
 415         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 416         if (ret) {
 417                 printf("bcm2835: Could not query board revision\n");
 418                 /* Ignore error; not critical */
 419                 return;
 420         }
 421
 422         /*
 423          * For details of old-vs-new scheme, see:
 424          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 425          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 426          * (a few posts down)
 427          *
 428          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 429          * lower byte to use as the board rev:
 430          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 431          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 432          */
 433         revision = msg->get_board_rev.body.resp.rev;
 434         if (revision & 0x800000) {
 435                 rev_scheme = 1;
 436                 rev_type = (revision >> 4) & 0xff;
 437                 models = rpi_models_new_scheme;
 438                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 439         } else {
 440                 rev_scheme = 0;
 441                 rev_type = revision & 0xff;
 442                 models = rpi_models_old_scheme;
 443                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 444         }
 445         if (rev_type >= models_count) {
 446                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 447                 model = &rpi_model_unknown;
 448         } else if (!models[rev_type].name) {
 449                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 450                 model = &rpi_model_unknown;
 451         } else {
 452                 model = &models[rev_type];
 453         }
 454
 455         printf("RPI %s (0x%x)\n", model->name, revision);
 456 }
 457
 458 int board_init(void)
 459 {
 460 #ifdef CONFIG_HW_WATCHDOG
 461         hw_watchdog_init();
 462 #endif
 463
 464         get_board_rev();
 465
 466         gd->bd->bi_boot_params = 0x100;
 467
 468         return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 469 }
 470
 471 /*
 472  * If the firmware passed a device tree use it for U-Boot.
 473  */
 474 void *board_fdt_blob_setup(void)
 475 {
 476         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 477                 return NULL;
 478         return (void *)fw_dtb_pointer;
 479 }
 480
 481 int ft_board_setup(void *blob, bd_t *bd)
 482 {
 483         /*
 484          * For now, we simply always add the simplefb DT node. Later, we
 485          * should be more intelligent, and e.g. only do this if no enabled DT
 486          * node exists for the "real" graphics driver.
 487          */
 488         lcd_dt_simplefb_add_node(blob);
 489
 490 #ifdef CONFIG_EFI_LOADER
 491         /* Reserve the spin table */
 492         efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 493 #endif
 494
 495         return 0;
 496 }