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.org/documentation/hardware/raspberrypi/revision-codes/README.md
  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};
 161
 162static const struct rpi_model rpi_models_old_scheme[] = {
 163        [0x2] = {
 164                "Model B",
 165                DTB_DIR "bcm2835-rpi-b.dtb",
 166                true,
 167        },
 168        [0x3] = {
 169                "Model B",
 170                DTB_DIR "bcm2835-rpi-b.dtb",
 171                true,
 172        },
 173        [0x4] = {
 174                "Model B rev2",
 175                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 176                true,
 177        },
 178        [0x5] = {
 179                "Model B rev2",
 180                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 181                true,
 182        },
 183        [0x6] = {
 184                "Model B rev2",
 185                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 186                true,
 187        },
 188        [0x7] = {
 189                "Model A",
 190                DTB_DIR "bcm2835-rpi-a.dtb",
 191                false,
 192        },
 193        [0x8] = {
 194                "Model A",
 195                DTB_DIR "bcm2835-rpi-a.dtb",
 196                false,
 197        },
 198        [0x9] = {
 199                "Model A",
 200                DTB_DIR "bcm2835-rpi-a.dtb",
 201                false,
 202        },
 203        [0xd] = {
 204                "Model B rev2",
 205                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 206                true,
 207        },
 208        [0xe] = {
 209                "Model B rev2",
 210                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 211                true,
 212        },
 213        [0xf] = {
 214                "Model B rev2",
 215                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 216                true,
 217        },
 218        [0x10] = {
 219                "Model B+",
 220                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 221                true,
 222        },
 223        [0x11] = {
 224                "Compute Module",
 225                DTB_DIR "bcm2835-rpi-cm.dtb",
 226                false,
 227        },
 228        [0x12] = {
 229                "Model A+",
 230                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 231                false,
 232        },
 233        [0x13] = {
 234                "Model B+",
 235                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 236                true,
 237        },
 238        [0x14] = {
 239                "Compute Module",
 240                DTB_DIR "bcm2835-rpi-cm.dtb",
 241                false,
 242        },
 243        [0x15] = {
 244                "Model A+",
 245                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 246                false,
 247        },
 248};
 249
 250static uint32_t revision;
 251static uint32_t rev_scheme;
 252static uint32_t rev_type;
 253static const struct rpi_model *model;
 254
 255int dram_init(void)
 256{
 257        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 258        int ret;
 259
 260        BCM2835_MBOX_INIT_HDR(msg);
 261        BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 262
 263        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 264        if (ret) {
 265                printf("bcm2835: Could not query ARM memory size\n");
 266                return -1;
 267        }
 268
 269        gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 270
 271        return 0;
 272}
 273
 274#ifdef CONFIG_OF_BOARD
 275int dram_init_banksize(void)
 276{
 277        int ret;
 278
 279        ret = fdtdec_setup_memory_banksize();
 280        if (ret)
 281                return ret;
 282
 283        return fdtdec_setup_mem_size_base();
 284}
 285#endif
 286
 287static 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 */
 302static 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 */
 316unsigned 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
 323static 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
 353static 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
 368static 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), "%016llx",
 388                 msg->get_board_serial.body.resp.serial);
 389        env_set("serial#", serial_string);
 390}
 391
 392int 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
 405static 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
 458int 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 */
 474void *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
 481int 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}
 497