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 <inttypes.h>
   8#include <config.h>
   9#include <dm.h>
  10#include <environment.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
  29DECLARE_GLOBAL_DATA_PTR;
  30
  31/* From lowlevel_init.S */
  32extern unsigned long fw_dtb_pointer;
  33
  34/* TODO(sjg@chromium.org): Move these to the msg.c file */
  35struct 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
  41struct 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
  47struct 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
  53struct 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
  59struct 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 */
  81struct rpi_model {
  82        const char *name;
  83        const char *fdtfile;
  84        bool has_onboard_eth;
  85};
  86
  87static const struct rpi_model rpi_model_unknown = {
  88        "Unknown model",
  89        DTB_DIR "bcm283x-rpi-other.dtb",
  90        false,
  91};
  92
  93static 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
 151static 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
 239static uint32_t revision;
 240static uint32_t rev_scheme;
 241static uint32_t rev_type;
 242static const struct rpi_model *model;
 243
 244#ifdef CONFIG_ARM64
 245static 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
 265struct mm_region *mem_map = bcm2837_mem_map;
 266#endif
 267
 268int 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
 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), "%016" PRIx64,
 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