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 <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
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 /* From lowlevel_init.S */
  31 extern unsigned long fw_dtb_pointer;
  32
  33 /* TODO(sjg@chromium.org): Move these to the msg.c file */
  34 struct 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
  40 struct 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
  46 struct 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
  52 struct 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
  58 struct 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  */
  73 struct rpi_model {
  74         const char *name;
  75         const char *fdtfile;
  76         bool has_onboard_eth;
  77 };
  78
  79 static const struct rpi_model rpi_model_unknown = {
  80         "Unknown model",
  81         DTB_DIR "bcm283x-rpi-other.dtb",
  82         false,
  83 };
  84
  85 static 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         [0x10] = {
 147                 "Compute Module 3+",
 148                 DTB_DIR "bcm2837-rpi-cm3.dtb",
 149                 false,
 150         },
 151 };
 152
 153 static const struct rpi_model rpi_models_old_scheme[] = {
 154         [0x2] = {
 155                 "Model B",
 156                 DTB_DIR "bcm2835-rpi-b.dtb",
 157                 true,
 158         },
 159         [0x3] = {
 160                 "Model B",
 161                 DTB_DIR "bcm2835-rpi-b.dtb",
 162                 true,
 163         },
 164         [0x4] = {
 165                 "Model B rev2",
 166                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 167                 true,
 168         },
 169         [0x5] = {
 170                 "Model B rev2",
 171                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 172                 true,
 173         },
 174         [0x6] = {
 175                 "Model B rev2",
 176                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 177                 true,
 178         },
 179         [0x7] = {
 180                 "Model A",
 181                 DTB_DIR "bcm2835-rpi-a.dtb",
 182                 false,
 183         },
 184         [0x8] = {
 185                 "Model A",
 186                 DTB_DIR "bcm2835-rpi-a.dtb",
 187                 false,
 188         },
 189         [0x9] = {
 190                 "Model A",
 191                 DTB_DIR "bcm2835-rpi-a.dtb",
 192                 false,
 193         },
 194         [0xd] = {
 195                 "Model B rev2",
 196                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 197                 true,
 198         },
 199         [0xe] = {
 200                 "Model B rev2",
 201                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 202                 true,
 203         },
 204         [0xf] = {
 205                 "Model B rev2",
 206                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 207                 true,
 208         },
 209         [0x10] = {
 210                 "Model B+",
 211                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 212                 true,
 213         },
 214         [0x11] = {
 215                 "Compute Module",
 216                 DTB_DIR "bcm2835-rpi-cm.dtb",
 217                 false,
 218         },
 219         [0x12] = {
 220                 "Model A+",
 221                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 222                 false,
 223         },
 224         [0x13] = {
 225                 "Model B+",
 226                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 227                 true,
 228         },
 229         [0x14] = {
 230                 "Compute Module",
 231                 DTB_DIR "bcm2835-rpi-cm.dtb",
 232                 false,
 233         },
 234         [0x15] = {
 235                 "Model A+",
 236                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 237                 false,
 238         },
 239 };
 240
 241 static uint32_t revision;
 242 static uint32_t rev_scheme;
 243 static uint32_t rev_type;
 244 static const struct rpi_model *model;
 245
 246 #ifdef CONFIG_ARM64
 247 static struct mm_region bcm2837_mem_map[] = {
 248         {
 249                 .virt = 0x00000000UL,
 250                 .phys = 0x00000000UL,
 251                 .size = 0x3f000000UL,
 252                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 253                          PTE_BLOCK_INNER_SHARE
 254         }, {
 255                 .virt = 0x3f000000UL,
 256                 .phys = 0x3f000000UL,
 257                 .size = 0x01000000UL,
 258                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 259                          PTE_BLOCK_NON_SHARE |
 260                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 261         }, {
 262                 /* List terminator */
 263                 0,
 264         }
 265 };
 266
 267 struct mm_region *mem_map = bcm2837_mem_map;
 268 #endif
 269
 270 int 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         return 0;
 287 }
 288
 289 static void set_fdtfile(void)
 290 {
 291         const char *fdtfile;
 292
 293         if (env_get("fdtfile"))
 294                 return;
 295
 296         fdtfile = model->fdtfile;
 297         env_set("fdtfile", fdtfile);
 298 }
 299
 300 /*
 301  * If the firmware provided a valid FDT at boot time, let's expose it in
 302  * ${fdt_addr} so it may be passed unmodified to the kernel.
 303  */
 304 static void set_fdt_addr(void)
 305 {
 306         if (env_get("fdt_addr"))
 307                 return;
 308
 309         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 310                 return;
 311
 312         env_set_hex("fdt_addr", fw_dtb_pointer);
 313 }
 314
 315 /*
 316  * Prevent relocation from stomping on a firmware provided FDT blob.
 317  */
 318 unsigned long board_get_usable_ram_top(unsigned long total_size)
 319 {
 320         if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 321                 return gd->ram_top;
 322         return fw_dtb_pointer & ~0xffff;
 323 }
 324
 325 static void set_usbethaddr(void)
 326 {
 327         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 328         int ret;
 329
 330         if (!model->has_onboard_eth)
 331                 return;
 332
 333         if (env_get("usbethaddr"))
 334                 return;
 335
 336         BCM2835_MBOX_INIT_HDR(msg);
 337         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 338
 339         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 340         if (ret) {
 341                 printf("bcm2835: Could not query MAC address\n");
 342                 /* Ignore error; not critical */
 343                 return;
 344         }
 345
 346         eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 347
 348         if (!env_get("ethaddr"))
 349                 env_set("ethaddr", env_get("usbethaddr"));
 350
 351         return;
 352 }
 353
 354 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 355 static void set_board_info(void)
 356 {
 357         char s[11];
 358
 359         snprintf(s, sizeof(s), "0x%X", revision);
 360         env_set("board_revision", s);
 361         snprintf(s, sizeof(s), "%d", rev_scheme);
 362         env_set("board_rev_scheme", s);
 363         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 364         snprintf(s, sizeof(s), "0x%X", rev_type);
 365         env_set("board_rev", s);
 366         env_set("board_name", model->name);
 367 }
 368 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 369
 370 static void set_serial_number(void)
 371 {
 372         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 373         int ret;
 374         char serial_string[17] = { 0 };
 375
 376         if (env_get("serial#"))
 377                 return;
 378
 379         BCM2835_MBOX_INIT_HDR(msg);
 380         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 381
 382         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 383         if (ret) {
 384                 printf("bcm2835: Could not query board serial\n");
 385                 /* Ignore error; not critical */
 386                 return;
 387         }
 388
 389         snprintf(serial_string, sizeof(serial_string), "%016llx",
 390                  msg->get_board_serial.body.resp.serial);
 391         env_set("serial#", serial_string);
 392 }
 393
 394 int misc_init_r(void)
 395 {
 396         set_fdt_addr();
 397         set_fdtfile();
 398         set_usbethaddr();
 399 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 400         set_board_info();
 401 #endif
 402         set_serial_number();
 403
 404         return 0;
 405 }
 406
 407 static void get_board_rev(void)
 408 {
 409         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 410         int ret;
 411         const struct rpi_model *models;
 412         uint32_t models_count;
 413
 414         BCM2835_MBOX_INIT_HDR(msg);
 415         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 416
 417         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 418         if (ret) {
 419                 printf("bcm2835: Could not query board revision\n");
 420                 /* Ignore error; not critical */
 421                 return;
 422         }
 423
 424         /*
 425          * For details of old-vs-new scheme, see:
 426          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 427          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 428          * (a few posts down)
 429          *
 430          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 431          * lower byte to use as the board rev:
 432          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 433          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 434          */
 435         revision = msg->get_board_rev.body.resp.rev;
 436         if (revision & 0x800000) {
 437                 rev_scheme = 1;
 438                 rev_type = (revision >> 4) & 0xff;
 439                 models = rpi_models_new_scheme;
 440                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 441         } else {
 442                 rev_scheme = 0;
 443                 rev_type = revision & 0xff;
 444                 models = rpi_models_old_scheme;
 445                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 446         }
 447         if (rev_type >= models_count) {
 448                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 449                 model = &rpi_model_unknown;
 450         } else if (!models[rev_type].name) {
 451                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 452                 model = &rpi_model_unknown;
 453         } else {
 454                 model = &models[rev_type];
 455         }
 456
 457         printf("RPI %s (0x%x)\n", model->name, revision);
 458 }
 459
 460 int board_init(void)
 461 {
 462 #ifdef CONFIG_HW_WATCHDOG
 463         hw_watchdog_init();
 464 #endif
 465
 466         get_board_rev();
 467
 468         gd->bd->bi_boot_params = 0x100;
 469
 470         return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 471 }
 472
 473 /*
 474  * If the firmware passed a device tree use it for U-Boot.
 475  */
 476 void *board_fdt_blob_setup(void)
 477 {
 478         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 479                 return NULL;
 480         return (void *)fw_dtb_pointer;
 481 }
 482
 483 int ft_board_setup(void *blob, bd_t *bd)
 484 {
 485         /*
 486          * For now, we simply always add the simplefb DT node. Later, we
 487          * should be more intelligent, and e.g. only do this if no enabled DT
 488          * node exists for the "real" graphics driver.
 489          */
 490         lcd_dt_simplefb_add_node(blob);
 491
 492 #ifdef CONFIG_EFI_LOADER
 493         /* Reserve the spin table */
 494         efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 495 #endif
 496
 497         return 0;
 498 }