LXR uboot/board/raspberrypi/rpi/rpi.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * (C) Copyright 2012-2016 Stephen Warren
   4 */
   5
   6#include <common.h>
   7#include <config.h>
   8#include <dm.h>
   9#include <env.h>
  10#include <efi_loader.h>
  11#include <fdt_support.h>
  12#include <fdt_simplefb.h>
  13#include <init.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
  29DECLARE_GLOBAL_DATA_PTR;
  30
  31/* Assigned in lowlevel_init.S
  32 * Push the variable into the .data section so that it
  33 * does not get cleared later.
  34 */
  35unsigned long __section(".data") fw_dtb_pointer;
  36
  37/* TODO(sjg@chromium.org): Move these to the msg.c file */
  38struct msg_get_arm_mem {
  39        struct bcm2835_mbox_hdr hdr;
  40        struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  41        u32 end_tag;
  42};
  43
  44struct msg_get_board_rev {
  45        struct bcm2835_mbox_hdr hdr;
  46        struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  47        u32 end_tag;
  48};
  49
  50struct msg_get_board_serial {
  51        struct bcm2835_mbox_hdr hdr;
  52        struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  53        u32 end_tag;
  54};
  55
  56struct msg_get_mac_address {
  57        struct bcm2835_mbox_hdr hdr;
  58        struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  59        u32 end_tag;
  60};
  61
  62struct msg_get_clock_rate {
  63        struct bcm2835_mbox_hdr hdr;
  64        struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  65        u32 end_tag;
  66};
  67
  68#ifdef CONFIG_ARM64
  69#define DTB_DIR "broadcom/"
  70#else
  71#define DTB_DIR ""
  72#endif
  73
  74/*
  75 * https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-revision-codes
  76 */
  77struct rpi_model {
  78        const char *name;
  79        const char *fdtfile;
  80        bool has_onboard_eth;
  81};
  82
  83static const struct rpi_model rpi_model_unknown = {
  84        "Unknown model",
  85        DTB_DIR "bcm283x-rpi-other.dtb",
  86        false,
  87};
  88
  89static const struct rpi_model rpi_models_new_scheme[] = {
  90        [0x0] = {
  91                "Model A",
  92                DTB_DIR "bcm2835-rpi-a.dtb",
  93                false,
  94        },
  95        [0x1] = {
  96                "Model B",
  97                DTB_DIR "bcm2835-rpi-b.dtb",
  98                true,
  99        },
 100        [0x2] = {
 101                "Model A+",
 102                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 103                false,
 104        },
 105        [0x3] = {
 106                "Model B+",
 107                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 108                true,
 109        },
 110        [0x4] = {
 111                "2 Model B",
 112                DTB_DIR "bcm2836-rpi-2-b.dtb",
 113                true,
 114        },
 115        [0x6] = {
 116                "Compute Module",
 117                DTB_DIR "bcm2835-rpi-cm.dtb",
 118                false,
 119        },
 120        [0x8] = {
 121                "3 Model B",
 122                DTB_DIR "bcm2837-rpi-3-b.dtb",
 123                true,
 124        },
 125        [0x9] = {
 126                "Zero",
 127                DTB_DIR "bcm2835-rpi-zero.dtb",
 128                false,
 129        },
 130        [0xA] = {
 131                "Compute Module 3",
 132                DTB_DIR "bcm2837-rpi-cm3.dtb",
 133                false,
 134        },
 135        [0xC] = {
 136                "Zero W",
 137                DTB_DIR "bcm2835-rpi-zero-w.dtb",
 138                false,
 139        },
 140        [0xD] = {
 141                "3 Model B+",
 142                DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
 143                true,
 144        },
 145        [0xE] = {
 146                "3 Model A+",
 147                DTB_DIR "bcm2837-rpi-3-a-plus.dtb",
 148                false,
 149        },
 150        [0x10] = {
 151                "Compute Module 3+",
 152                DTB_DIR "bcm2837-rpi-cm3.dtb",
 153                false,
 154        },
 155        [0x11] = {
 156                "4 Model B",
 157                DTB_DIR "bcm2711-rpi-4-b.dtb",
 158                true,
 159        },
 160        [0x12] = {
 161                "Zero 2 W",
 162                DTB_DIR "bcm2837-rpi-zero-2.dtb",
 163                false,
 164        },
 165        [0x13] = {
 166                "400",
 167                DTB_DIR "bcm2711-rpi-400.dtb",
 168                true,
 169        },
 170        [0x14] = {
 171                "Compute Module 4",
 172                DTB_DIR "bcm2711-rpi-cm4.dtb",
 173                true,
 174        },
 175};
 176
 177static const struct rpi_model rpi_models_old_scheme[] = {
 178        [0x2] = {
 179                "Model B",
 180                DTB_DIR "bcm2835-rpi-b.dtb",
 181                true,
 182        },
 183        [0x3] = {
 184                "Model B",
 185                DTB_DIR "bcm2835-rpi-b.dtb",
 186                true,
 187        },
 188        [0x4] = {
 189                "Model B rev2",
 190                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 191                true,
 192        },
 193        [0x5] = {
 194                "Model B rev2",
 195                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 196                true,
 197        },
 198        [0x6] = {
 199                "Model B rev2",
 200                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 201                true,
 202        },
 203        [0x7] = {
 204                "Model A",
 205                DTB_DIR "bcm2835-rpi-a.dtb",
 206                false,
 207        },
 208        [0x8] = {
 209                "Model A",
 210                DTB_DIR "bcm2835-rpi-a.dtb",
 211                false,
 212        },
 213        [0x9] = {
 214                "Model A",
 215                DTB_DIR "bcm2835-rpi-a.dtb",
 216                false,
 217        },
 218        [0xd] = {
 219                "Model B rev2",
 220                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 221                true,
 222        },
 223        [0xe] = {
 224                "Model B rev2",
 225                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 226                true,
 227        },
 228        [0xf] = {
 229                "Model B rev2",
 230                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 231                true,
 232        },
 233        [0x10] = {
 234                "Model B+",
 235                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 236                true,
 237        },
 238        [0x11] = {
 239                "Compute Module",
 240                DTB_DIR "bcm2835-rpi-cm.dtb",
 241                false,
 242        },
 243        [0x12] = {
 244                "Model A+",
 245                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 246                false,
 247        },
 248        [0x13] = {
 249                "Model B+",
 250                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 251                true,
 252        },
 253        [0x14] = {
 254                "Compute Module",
 255                DTB_DIR "bcm2835-rpi-cm.dtb",
 256                false,
 257        },
 258        [0x15] = {
 259                "Model A+",
 260                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 261                false,
 262        },
 263};
 264
 265static uint32_t revision;
 266static uint32_t rev_scheme;
 267static uint32_t rev_type;
 268static const struct rpi_model *model;
 269
 270int dram_init(void)
 271{
 272        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 273        int ret;
 274
 275        BCM2835_MBOX_INIT_HDR(msg);
 276        BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 277
 278        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 279        if (ret) {
 280                printf("bcm2835: Could not query ARM memory size\n");
 281                return -1;
 282        }
 283
 284        gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 285
 286        /*
 287         * In some configurations the memory size returned by VideoCore
 288         * is not aligned to the section size, what is mandatory for
 289         * the u-boot's memory setup.
 290         */
 291        gd->ram_size &= ~MMU_SECTION_SIZE;
 292
 293        return 0;
 294}
 295
 296#ifdef CONFIG_OF_BOARD
 297int dram_init_banksize(void)
 298{
 299        int ret;
 300
 301        ret = fdtdec_setup_memory_banksize();
 302        if (ret)
 303                return ret;
 304
 305        return fdtdec_setup_mem_size_base();
 306}
 307#endif
 308
 309static void set_fdtfile(void)
 310{
 311        const char *fdtfile;
 312
 313        if (env_get("fdtfile"))
 314                return;
 315
 316        fdtfile = model->fdtfile;
 317        env_set("fdtfile", fdtfile);
 318}
 319
 320/*
 321 * If the firmware provided a valid FDT at boot time, let's expose it in
 322 * ${fdt_addr} so it may be passed unmodified to the kernel.
 323 */
 324static void set_fdt_addr(void)
 325{
 326        if (env_get("fdt_addr"))
 327                return;
 328
 329        if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 330                return;
 331
 332        env_set_hex("fdt_addr", fw_dtb_pointer);
 333}
 334
 335/*
 336 * Prevent relocation from stomping on a firmware provided FDT blob.
 337 */
 338unsigned long board_get_usable_ram_top(unsigned long total_size)
 339{
 340        if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 341                return gd->ram_top;
 342        return fw_dtb_pointer & ~0xffff;
 343}
 344
 345static void set_usbethaddr(void)
 346{
 347        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 348        int ret;
 349
 350        if (!model->has_onboard_eth)
 351                return;
 352
 353        if (env_get("usbethaddr"))
 354                return;
 355
 356        BCM2835_MBOX_INIT_HDR(msg);
 357        BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 358
 359        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 360        if (ret) {
 361                printf("bcm2835: Could not query MAC address\n");
 362                /* Ignore error; not critical */
 363                return;
 364        }
 365
 366        eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 367
 368        if (!env_get("ethaddr"))
 369                env_set("ethaddr", env_get("usbethaddr"));
 370
 371        return;
 372}
 373
 374#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 375static void set_board_info(void)
 376{
 377        char s[11];
 378
 379        snprintf(s, sizeof(s), "0x%X", revision);
 380        env_set("board_revision", s);
 381        snprintf(s, sizeof(s), "%d", rev_scheme);
 382        env_set("board_rev_scheme", s);
 383        /* Can't rename this to board_rev_type since it's an ABI for scripts */
 384        snprintf(s, sizeof(s), "0x%X", rev_type);
 385        env_set("board_rev", s);
 386        env_set("board_name", model->name);
 387}
 388#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 389
 390static void set_serial_number(void)
 391{
 392        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 393        int ret;
 394        char serial_string[17] = { 0 };
 395
 396        if (env_get("serial#"))
 397                return;
 398
 399        BCM2835_MBOX_INIT_HDR(msg);
 400        BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 401
 402        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 403        if (ret) {
 404                printf("bcm2835: Could not query board serial\n");
 405                /* Ignore error; not critical */
 406                return;
 407        }
 408
 409        snprintf(serial_string, sizeof(serial_string), "%016llx",
 410                 msg->get_board_serial.body.resp.serial);
 411        env_set("serial#", serial_string);
 412}
 413
 414int misc_init_r(void)
 415{
 416        set_fdt_addr();
 417        set_fdtfile();
 418        set_usbethaddr();
 419#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 420        set_board_info();
 421#endif
 422        set_serial_number();
 423
 424        return 0;
 425}
 426
 427static void get_board_revision(void)
 428{
 429        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 430        int ret;
 431        const struct rpi_model *models;
 432        uint32_t models_count;
 433
 434        BCM2835_MBOX_INIT_HDR(msg);
 435        BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 436
 437        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 438        if (ret) {
 439                printf("bcm2835: Could not query board revision\n");
 440                /* Ignore error; not critical */
 441                return;
 442        }
 443
 444        /*
 445         * For details of old-vs-new scheme, see:
 446         * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 447         * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 448         * (a few posts down)
 449         *
 450         * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 451         * lower byte to use as the board rev:
 452         * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 453         * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 454         */
 455        revision = msg->get_board_rev.body.resp.rev;
 456        if (revision & 0x800000) {
 457                rev_scheme = 1;
 458                rev_type = (revision >> 4) & 0xff;
 459                models = rpi_models_new_scheme;
 460                models_count = ARRAY_SIZE(rpi_models_new_scheme);
 461        } else {
 462                rev_scheme = 0;
 463                rev_type = revision & 0xff;
 464                models = rpi_models_old_scheme;
 465                models_count = ARRAY_SIZE(rpi_models_old_scheme);
 466        }
 467        if (rev_type >= models_count) {
 468                printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 469                model = &rpi_model_unknown;
 470        } else if (!models[rev_type].name) {
 471                printf("RPI: Board rev 0x%x unknown\n", rev_type);
 472                model = &rpi_model_unknown;
 473        } else {
 474                model = &models[rev_type];
 475        }
 476
 477        printf("RPI %s (0x%x)\n", model->name, revision);
 478}
 479
 480int board_init(void)
 481{
 482#ifdef CONFIG_HW_WATCHDOG
 483        hw_watchdog_init();
 484#endif
 485
 486        get_board_revision();
 487
 488        gd->bd->bi_boot_params = 0x100;
 489
 490        return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 491}
 492
 493/*
 494 * If the firmware passed a device tree use it for U-Boot.
 495 */
 496void *board_fdt_blob_setup(int *err)
 497{
 498        *err = 0;
 499        if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC) {
 500                *err = -ENXIO;
 501                return NULL;
 502        }
 503
 504        return (void *)fw_dtb_pointer;
 505}
 506
 507int ft_board_setup(void *blob, struct bd_info *bd)
 508{
 509        int node;
 510
 511        node = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
 512        if (node < 0)
 513                lcd_dt_simplefb_add_node(blob);
 514
 515#ifdef CONFIG_EFI_LOADER
 516        /* Reserve the spin table */
 517        efi_add_memory_map(0, CONFIG_RPI_EFI_NR_SPIN_PAGES << EFI_PAGE_SHIFT,
 518                           EFI_RESERVED_MEMORY_TYPE);
 519#endif
 520
 521        return 0;
 522}
 523