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 <environment.h>
  10#include <efi_loader.h>
  11#include <fdt_support.h>
  12#include <fdt_simplefb.h>
  13#include <lcd.h>
  14#include <memalign.h>
  15#include <mmc.h>
  16#include <asm/gpio.h>
  17#include <asm/arch/mbox.h>
  18#include <asm/arch/msg.h>
  19#include <asm/arch/sdhci.h>
  20#include <asm/global_data.h>
  21#include <dm/platform_data/serial_bcm283x_mu.h>
  22#ifdef CONFIG_ARM64
  23#include <asm/armv8/mmu.h>
  24#endif
  25#include <watchdog.h>
  26#include <dm/pinctrl.h>
  27
  28DECLARE_GLOBAL_DATA_PTR;
  29
  30/* From lowlevel_init.S */
  31extern unsigned long fw_dtb_pointer;
  32
  33/* TODO(sjg@chromium.org): Move these to the msg.c file */
  34struct msg_get_arm_mem {
  35        struct bcm2835_mbox_hdr hdr;
  36        struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  37        u32 end_tag;
  38};
  39
  40struct msg_get_board_rev {
  41        struct bcm2835_mbox_hdr hdr;
  42        struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  43        u32 end_tag;
  44};
  45
  46struct msg_get_board_serial {
  47        struct bcm2835_mbox_hdr hdr;
  48        struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  49        u32 end_tag;
  50};
  51
  52struct msg_get_mac_address {
  53        struct bcm2835_mbox_hdr hdr;
  54        struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  55        u32 end_tag;
  56};
  57
  58struct msg_get_clock_rate {
  59        struct bcm2835_mbox_hdr hdr;
  60        struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  61        u32 end_tag;
  62};
  63
  64#ifdef CONFIG_ARM64
  65#define DTB_DIR "broadcom/"
  66#else
  67#define DTB_DIR ""
  68#endif
  69
  70/*
  71 * https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
  72 */
  73struct rpi_model {
  74        const char *name;
  75        const char *fdtfile;
  76        bool has_onboard_eth;
  77};
  78
  79static const struct rpi_model rpi_model_unknown = {
  80        "Unknown model",
  81        DTB_DIR "bcm283x-rpi-other.dtb",
  82        false,
  83};
  84
  85static const struct rpi_model rpi_models_new_scheme[] = {
  86        [0x0] = {
  87                "Model A",
  88                DTB_DIR "bcm2835-rpi-a.dtb",
  89                false,
  90        },
  91        [0x1] = {
  92                "Model B",
  93                DTB_DIR "bcm2835-rpi-b.dtb",
  94                true,
  95        },
  96        [0x2] = {
  97                "Model A+",
  98                DTB_DIR "bcm2835-rpi-a-plus.dtb",
  99                false,
 100        },
 101        [0x3] = {
 102                "Model B+",
 103                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 104                true,
 105        },
 106        [0x4] = {
 107                "2 Model B",
 108                DTB_DIR "bcm2836-rpi-2-b.dtb",
 109                true,
 110        },
 111        [0x6] = {
 112                "Compute Module",
 113                DTB_DIR "bcm2835-rpi-cm.dtb",
 114                false,
 115        },
 116        [0x8] = {
 117                "3 Model B",
 118                DTB_DIR "bcm2837-rpi-3-b.dtb",
 119                true,
 120        },
 121        [0x9] = {
 122                "Zero",
 123                DTB_DIR "bcm2835-rpi-zero.dtb",
 124                false,
 125        },
 126        [0xA] = {
 127                "Compute Module 3",
 128                DTB_DIR "bcm2837-rpi-cm3.dtb",
 129                false,
 130        },
 131        [0xC] = {
 132                "Zero W",
 133                DTB_DIR "bcm2835-rpi-zero-w.dtb",
 134                false,
 135        },
 136        [0xD] = {
 137                "3 Model B+",
 138                DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
 139                true,
 140        },
 141        [0xE] = {
 142                "3 Model A+",
 143                DTB_DIR "bcm2837-rpi-3-a-plus.dtb",
 144                false,
 145        },
 146};
 147
 148static const struct rpi_model rpi_models_old_scheme[] = {
 149        [0x2] = {
 150                "Model B",
 151                DTB_DIR "bcm2835-rpi-b.dtb",
 152                true,
 153        },
 154        [0x3] = {
 155                "Model B",
 156                DTB_DIR "bcm2835-rpi-b.dtb",
 157                true,
 158        },
 159        [0x4] = {
 160                "Model B rev2",
 161                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 162                true,
 163        },
 164        [0x5] = {
 165                "Model B rev2",
 166                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 167                true,
 168        },
 169        [0x6] = {
 170                "Model B rev2",
 171                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 172                true,
 173        },
 174        [0x7] = {
 175                "Model A",
 176                DTB_DIR "bcm2835-rpi-a.dtb",
 177                false,
 178        },
 179        [0x8] = {
 180                "Model A",
 181                DTB_DIR "bcm2835-rpi-a.dtb",
 182                false,
 183        },
 184        [0x9] = {
 185                "Model A",
 186                DTB_DIR "bcm2835-rpi-a.dtb",
 187                false,
 188        },
 189        [0xd] = {
 190                "Model B rev2",
 191                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 192                true,
 193        },
 194        [0xe] = {
 195                "Model B rev2",
 196                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 197                true,
 198        },
 199        [0xf] = {
 200                "Model B rev2",
 201                DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 202                true,
 203        },
 204        [0x10] = {
 205                "Model B+",
 206                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 207                true,
 208        },
 209        [0x11] = {
 210                "Compute Module",
 211                DTB_DIR "bcm2835-rpi-cm.dtb",
 212                false,
 213        },
 214        [0x12] = {
 215                "Model A+",
 216                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 217                false,
 218        },
 219        [0x13] = {
 220                "Model B+",
 221                DTB_DIR "bcm2835-rpi-b-plus.dtb",
 222                true,
 223        },
 224        [0x14] = {
 225                "Compute Module",
 226                DTB_DIR "bcm2835-rpi-cm.dtb",
 227                false,
 228        },
 229        [0x15] = {
 230                "Model A+",
 231                DTB_DIR "bcm2835-rpi-a-plus.dtb",
 232                false,
 233        },
 234};
 235
 236static uint32_t revision;
 237static uint32_t rev_scheme;
 238static uint32_t rev_type;
 239static const struct rpi_model *model;
 240
 241#ifdef CONFIG_ARM64
 242static struct mm_region bcm2837_mem_map[] = {
 243        {
 244                .virt = 0x00000000UL,
 245                .phys = 0x00000000UL,
 246                .size = 0x3f000000UL,
 247                .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 248                         PTE_BLOCK_INNER_SHARE
 249        }, {
 250                .virt = 0x3f000000UL,
 251                .phys = 0x3f000000UL,
 252                .size = 0x01000000UL,
 253                .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 254                         PTE_BLOCK_NON_SHARE |
 255                         PTE_BLOCK_PXN | PTE_BLOCK_UXN
 256        }, {
 257                /* List terminator */
 258                0,
 259        }
 260};
 261
 262struct mm_region *mem_map = bcm2837_mem_map;
 263#endif
 264
 265int dram_init(void)
 266{
 267        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 268        int ret;
 269
 270        BCM2835_MBOX_INIT_HDR(msg);
 271        BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 272
 273        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 274        if (ret) {
 275                printf("bcm2835: Could not query ARM memory size\n");
 276                return -1;
 277        }
 278
 279        gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 280
 281        return 0;
 282}
 283
 284static void set_fdtfile(void)
 285{
 286        const char *fdtfile;
 287
 288        if (env_get("fdtfile"))
 289                return;
 290
 291        fdtfile = model->fdtfile;
 292        env_set("fdtfile", fdtfile);
 293}
 294
 295/*
 296 * If the firmware provided a valid FDT at boot time, let's expose it in
 297 * ${fdt_addr} so it may be passed unmodified to the kernel.
 298 */
 299static void set_fdt_addr(void)
 300{
 301        if (env_get("fdt_addr"))
 302                return;
 303
 304        if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 305                return;
 306
 307        env_set_hex("fdt_addr", fw_dtb_pointer);
 308}
 309
 310/*
 311 * Prevent relocation from stomping on a firmware provided FDT blob.
 312 */
 313unsigned long board_get_usable_ram_top(unsigned long total_size)
 314{
 315        if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 316                return gd->ram_top;
 317        return fw_dtb_pointer & ~0xffff;
 318}
 319
 320static void set_usbethaddr(void)
 321{
 322        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 323        int ret;
 324
 325        if (!model->has_onboard_eth)
 326                return;
 327
 328        if (env_get("usbethaddr"))
 329                return;
 330
 331        BCM2835_MBOX_INIT_HDR(msg);
 332        BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 333
 334        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 335        if (ret) {
 336                printf("bcm2835: Could not query MAC address\n");
 337                /* Ignore error; not critical */
 338                return;
 339        }
 340
 341        eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 342
 343        if (!env_get("ethaddr"))
 344                env_set("ethaddr", env_get("usbethaddr"));
 345
 346        return;
 347}
 348
 349#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 350static void set_board_info(void)
 351{
 352        char s[11];
 353
 354        snprintf(s, sizeof(s), "0x%X", revision);
 355        env_set("board_revision", s);
 356        snprintf(s, sizeof(s), "%d", rev_scheme);
 357        env_set("board_rev_scheme", s);
 358        /* Can't rename this to board_rev_type since it's an ABI for scripts */
 359        snprintf(s, sizeof(s), "0x%X", rev_type);
 360        env_set("board_rev", s);
 361        env_set("board_name", model->name);
 362}
 363#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 364
 365static void set_serial_number(void)
 366{
 367        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 368        int ret;
 369        char serial_string[17] = { 0 };
 370
 371        if (env_get("serial#"))
 372                return;
 373
 374        BCM2835_MBOX_INIT_HDR(msg);
 375        BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 376
 377        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 378        if (ret) {
 379                printf("bcm2835: Could not query board serial\n");
 380                /* Ignore error; not critical */
 381                return;
 382        }
 383
 384        snprintf(serial_string, sizeof(serial_string), "%016llx",
 385                 msg->get_board_serial.body.resp.serial);
 386        env_set("serial#", serial_string);
 387}
 388
 389int misc_init_r(void)
 390{
 391        set_fdt_addr();
 392        set_fdtfile();
 393        set_usbethaddr();
 394#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 395        set_board_info();
 396#endif
 397        set_serial_number();
 398
 399        return 0;
 400}
 401
 402static void get_board_rev(void)
 403{
 404        ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 405        int ret;
 406        const struct rpi_model *models;
 407        uint32_t models_count;
 408
 409        BCM2835_MBOX_INIT_HDR(msg);
 410        BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 411
 412        ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 413        if (ret) {
 414                printf("bcm2835: Could not query board revision\n");
 415                /* Ignore error; not critical */
 416                return;
 417        }
 418
 419        /*
 420         * For details of old-vs-new scheme, see:
 421         * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 422         * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 423         * (a few posts down)
 424         *
 425         * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 426         * lower byte to use as the board rev:
 427         * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 428         * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 429         */
 430        revision = msg->get_board_rev.body.resp.rev;
 431        if (revision & 0x800000) {
 432                rev_scheme = 1;
 433                rev_type = (revision >> 4) & 0xff;
 434                models = rpi_models_new_scheme;
 435                models_count = ARRAY_SIZE(rpi_models_new_scheme);
 436        } else {
 437                rev_scheme = 0;
 438                rev_type = revision & 0xff;
 439                models = rpi_models_old_scheme;
 440                models_count = ARRAY_SIZE(rpi_models_old_scheme);
 441        }
 442        if (rev_type >= models_count) {
 443                printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 444                model = &rpi_model_unknown;
 445        } else if (!models[rev_type].name) {
 446                printf("RPI: Board rev 0x%x unknown\n", rev_type);
 447                model = &rpi_model_unknown;
 448        } else {
 449                model = &models[rev_type];
 450        }
 451
 452        printf("RPI %s (0x%x)\n", model->name, revision);
 453}
 454
 455int board_init(void)
 456{
 457#ifdef CONFIG_HW_WATCHDOG
 458        hw_watchdog_init();
 459#endif
 460
 461        get_board_rev();
 462
 463        gd->bd->bi_boot_params = 0x100;
 464
 465        return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 466}
 467
 468/*
 469 * If the firmware passed a device tree use it for U-Boot.
 470 */
 471void *board_fdt_blob_setup(void)
 472{
 473        if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 474                return NULL;
 475        return (void *)fw_dtb_pointer;
 476}
 477
 478int ft_board_setup(void *blob, bd_t *bd)
 479{
 480        /*
 481         * For now, we simply always add the simplefb DT node. Later, we
 482         * should be more intelligent, and e.g. only do this if no enabled DT
 483         * node exists for the "real" graphics driver.
 484         */
 485        lcd_dt_simplefb_add_node(blob);
 486
 487#ifdef CONFIG_EFI_LOADER
 488        /* Reserve the spin table */
 489        efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 490#endif
 491
 492        return 0;
 493}
 494