git.sur5r.net Git - u-boot/blob - board/raspberrypi/rpi/rpi.c

   1 /*
   2  * (C) Copyright 2012-2016 Stephen Warren
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <inttypes.h>
   9 #include <config.h>
  10 #include <dm.h>
  11 #include <environment.h>
  12 #include <efi_loader.h>
  13 #include <fdt_support.h>
  14 #include <fdt_simplefb.h>
  15 #include <lcd.h>
  16 #include <memalign.h>
  17 #include <mmc.h>
  18 #include <asm/gpio.h>
  19 #include <asm/arch/mbox.h>
  20 #include <asm/arch/msg.h>
  21 #include <asm/arch/sdhci.h>
  22 #include <asm/global_data.h>
  23 #include <dm/platform_data/serial_bcm283x_mu.h>
  24 #ifdef CONFIG_ARM64
  25 #include <asm/armv8/mmu.h>
  26 #endif
  27 #include <watchdog.h>
  28 #include <dm/pinctrl.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 /* From lowlevel_init.S */
  33 extern unsigned long fw_dtb_pointer;
  34
  35 /* TODO(sjg@chromium.org): Move these to the msg.c file */
  36 struct msg_get_arm_mem {
  37         struct bcm2835_mbox_hdr hdr;
  38         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  39         u32 end_tag;
  40 };
  41
  42 struct msg_get_board_rev {
  43         struct bcm2835_mbox_hdr hdr;
  44         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  45         u32 end_tag;
  46 };
  47
  48 struct msg_get_board_serial {
  49         struct bcm2835_mbox_hdr hdr;
  50         struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  51         u32 end_tag;
  52 };
  53
  54 struct msg_get_mac_address {
  55         struct bcm2835_mbox_hdr hdr;
  56         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  57         u32 end_tag;
  58 };
  59
  60 struct msg_get_clock_rate {
  61         struct bcm2835_mbox_hdr hdr;
  62         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  63         u32 end_tag;
  64 };
  65
  66 #ifdef CONFIG_ARM64
  67 #define DTB_DIR "broadcom/"
  68 #else
  69 #define DTB_DIR ""
  70 #endif
  71
  72 /*
  73  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
  74  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
  75  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
  76  *
  77  * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
  78  * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
  79  * Foundation stated that the following source was accurate:
  80  * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
  81  */
  82 struct rpi_model {
  83         const char *name;
  84         const char *fdtfile;
  85         bool has_onboard_eth;
  86 };
  87
  88 static const struct rpi_model rpi_model_unknown = {
  89         "Unknown model",
  90         DTB_DIR "bcm283x-rpi-other.dtb",
  91         false,
  92 };
  93
  94 static const struct rpi_model rpi_models_new_scheme[] = {
  95         [0x0] = {
  96                 "Model A",
  97                 DTB_DIR "bcm2835-rpi-a.dtb",
  98                 false,
  99         },
 100         [0x1] = {
 101                 "Model B",
 102                 DTB_DIR "bcm2835-rpi-b.dtb",
 103                 true,
 104         },
 105         [0x2] = {
 106                 "Model A+",
 107                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 108                 false,
 109         },
 110         [0x3] = {
 111                 "Model B+",
 112                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 113                 true,
 114         },
 115         [0x4] = {
 116                 "2 Model B",
 117                 DTB_DIR "bcm2836-rpi-2-b.dtb",
 118                 true,
 119         },
 120         [0x6] = {
 121                 "Compute Module",
 122                 DTB_DIR "bcm2835-rpi-cm.dtb",
 123                 false,
 124         },
 125         [0x8] = {
 126                 "3 Model B",
 127                 DTB_DIR "bcm2837-rpi-3-b.dtb",
 128                 true,
 129         },
 130         [0x9] = {
 131                 "Zero",
 132                 DTB_DIR "bcm2835-rpi-zero.dtb",
 133                 false,
 134         },
 135         [0xA] = {
 136                 "Compute Module 3",
 137                 DTB_DIR "bcm2837-rpi-cm3.dtb",
 138                 false,
 139         },
 140         [0xC] = {
 141                 "Zero W",
 142                 DTB_DIR "bcm2835-rpi-zero-w.dtb",
 143                 false,
 144         },
 145         [0xD] = {
 146                 "3 Model B+",
 147                 DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
 148                 true,
 149         },
 150 };
 151
 152 static const struct rpi_model rpi_models_old_scheme[] = {
 153         [0x2] = {
 154                 "Model B",
 155                 DTB_DIR "bcm2835-rpi-b.dtb",
 156                 true,
 157         },
 158         [0x3] = {
 159                 "Model B",
 160                 DTB_DIR "bcm2835-rpi-b.dtb",
 161                 true,
 162         },
 163         [0x4] = {
 164                 "Model B rev2",
 165                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 166                 true,
 167         },
 168         [0x5] = {
 169                 "Model B rev2",
 170                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 171                 true,
 172         },
 173         [0x6] = {
 174                 "Model B rev2",
 175                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 176                 true,
 177         },
 178         [0x7] = {
 179                 "Model A",
 180                 DTB_DIR "bcm2835-rpi-a.dtb",
 181                 false,
 182         },
 183         [0x8] = {
 184                 "Model A",
 185                 DTB_DIR "bcm2835-rpi-a.dtb",
 186                 false,
 187         },
 188         [0x9] = {
 189                 "Model A",
 190                 DTB_DIR "bcm2835-rpi-a.dtb",
 191                 false,
 192         },
 193         [0xd] = {
 194                 "Model B rev2",
 195                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 196                 true,
 197         },
 198         [0xe] = {
 199                 "Model B rev2",
 200                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 201                 true,
 202         },
 203         [0xf] = {
 204                 "Model B rev2",
 205                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 206                 true,
 207         },
 208         [0x10] = {
 209                 "Model B+",
 210                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 211                 true,
 212         },
 213         [0x11] = {
 214                 "Compute Module",
 215                 DTB_DIR "bcm2835-rpi-cm.dtb",
 216                 false,
 217         },
 218         [0x12] = {
 219                 "Model A+",
 220                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 221                 false,
 222         },
 223         [0x13] = {
 224                 "Model B+",
 225                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 226                 true,
 227         },
 228         [0x14] = {
 229                 "Compute Module",
 230                 DTB_DIR "bcm2835-rpi-cm.dtb",
 231                 false,
 232         },
 233         [0x15] = {
 234                 "Model A+",
 235                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 236                 false,
 237         },
 238 };
 239
 240 static uint32_t revision;
 241 static uint32_t rev_scheme;
 242 static uint32_t rev_type;
 243 static const struct rpi_model *model;
 244
 245 #ifdef CONFIG_ARM64
 246 static struct mm_region bcm2837_mem_map[] = {
 247         {
 248                 .virt = 0x00000000UL,
 249                 .phys = 0x00000000UL,
 250                 .size = 0x3f000000UL,
 251                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 252                          PTE_BLOCK_INNER_SHARE
 253         }, {
 254                 .virt = 0x3f000000UL,
 255                 .phys = 0x3f000000UL,
 256                 .size = 0x01000000UL,
 257                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 258                          PTE_BLOCK_NON_SHARE |
 259                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 260         }, {
 261                 /* List terminator */
 262                 0,
 263         }
 264 };
 265
 266 struct mm_region *mem_map = bcm2837_mem_map;
 267 #endif
 268
 269 int dram_init(void)
 270 {
 271         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 272         int ret;
 273
 274         BCM2835_MBOX_INIT_HDR(msg);
 275         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 276
 277         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 278         if (ret) {
 279                 printf("bcm2835: Could not query ARM memory size\n");
 280                 return -1;
 281         }
 282
 283         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 284
 285         return 0;
 286 }
 287
 288 static void set_fdtfile(void)
 289 {
 290         const char *fdtfile;
 291
 292         if (env_get("fdtfile"))
 293                 return;
 294
 295         fdtfile = model->fdtfile;
 296         env_set("fdtfile", fdtfile);
 297 }
 298
 299 /*
 300  * If the firmware provided a valid FDT at boot time, let's expose it in
 301  * ${fdt_addr} so it may be passed unmodified to the kernel.
 302  */
 303 static void set_fdt_addr(void)
 304 {
 305         if (env_get("fdt_addr"))
 306                 return;
 307
 308         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 309                 return;
 310
 311         env_set_hex("fdt_addr", fw_dtb_pointer);
 312 }
 313
 314 /*
 315  * Prevent relocation from stomping on a firmware provided FDT blob.
 316  */
 317 unsigned long board_get_usable_ram_top(unsigned long total_size)
 318 {
 319         if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 320                 return gd->ram_top;
 321         return fw_dtb_pointer & ~0xffff;
 322 }
 323
 324 static void set_usbethaddr(void)
 325 {
 326         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 327         int ret;
 328
 329         if (!model->has_onboard_eth)
 330                 return;
 331
 332         if (env_get("usbethaddr"))
 333                 return;
 334
 335         BCM2835_MBOX_INIT_HDR(msg);
 336         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 337
 338         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 339         if (ret) {
 340                 printf("bcm2835: Could not query MAC address\n");
 341                 /* Ignore error; not critical */
 342                 return;
 343         }
 344
 345         eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 346
 347         if (!env_get("ethaddr"))
 348                 env_set("ethaddr", env_get("usbethaddr"));
 349
 350         return;
 351 }
 352
 353 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 354 static void set_board_info(void)
 355 {
 356         char s[11];
 357
 358         snprintf(s, sizeof(s), "0x%X", revision);
 359         env_set("board_revision", s);
 360         snprintf(s, sizeof(s), "%d", rev_scheme);
 361         env_set("board_rev_scheme", s);
 362         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 363         snprintf(s, sizeof(s), "0x%X", rev_type);
 364         env_set("board_rev", s);
 365         env_set("board_name", model->name);
 366 }
 367 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 368
 369 static void set_serial_number(void)
 370 {
 371         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 372         int ret;
 373         char serial_string[17] = { 0 };
 374
 375         if (env_get("serial#"))
 376                 return;
 377
 378         BCM2835_MBOX_INIT_HDR(msg);
 379         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 380
 381         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 382         if (ret) {
 383                 printf("bcm2835: Could not query board serial\n");
 384                 /* Ignore error; not critical */
 385                 return;
 386         }
 387
 388         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 389                  msg->get_board_serial.body.resp.serial);
 390         env_set("serial#", serial_string);
 391 }
 392
 393 int misc_init_r(void)
 394 {
 395         set_fdt_addr();
 396         set_fdtfile();
 397         set_usbethaddr();
 398 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 399         set_board_info();
 400 #endif
 401         set_serial_number();
 402
 403         return 0;
 404 }
 405
 406 static void get_board_rev(void)
 407 {
 408         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 409         int ret;
 410         const struct rpi_model *models;
 411         uint32_t models_count;
 412
 413         BCM2835_MBOX_INIT_HDR(msg);
 414         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 415
 416         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 417         if (ret) {
 418                 printf("bcm2835: Could not query board revision\n");
 419                 /* Ignore error; not critical */
 420                 return;
 421         }
 422
 423         /*
 424          * For details of old-vs-new scheme, see:
 425          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 426          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 427          * (a few posts down)
 428          *
 429          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 430          * lower byte to use as the board rev:
 431          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 432          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 433          */
 434         revision = msg->get_board_rev.body.resp.rev;
 435         if (revision & 0x800000) {
 436                 rev_scheme = 1;
 437                 rev_type = (revision >> 4) & 0xff;
 438                 models = rpi_models_new_scheme;
 439                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 440         } else {
 441                 rev_scheme = 0;
 442                 rev_type = revision & 0xff;
 443                 models = rpi_models_old_scheme;
 444                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 445         }
 446         if (rev_type >= models_count) {
 447                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 448                 model = &rpi_model_unknown;
 449         } else if (!models[rev_type].name) {
 450                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 451                 model = &rpi_model_unknown;
 452         } else {
 453                 model = &models[rev_type];
 454         }
 455
 456         printf("RPI %s (0x%x)\n", model->name, revision);
 457 }
 458
 459 int board_init(void)
 460 {
 461 #ifdef CONFIG_HW_WATCHDOG
 462         hw_watchdog_init();
 463 #endif
 464
 465         get_board_rev();
 466
 467         gd->bd->bi_boot_params = 0x100;
 468
 469         return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 470 }
 471
 472 /*
 473  * If the firmware passed a device tree use it for U-Boot.
 474  */
 475 void *board_fdt_blob_setup(void)
 476 {
 477         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 478                 return NULL;
 479         return (void *)fw_dtb_pointer;
 480 }
 481
 482 int ft_board_setup(void *blob, bd_t *bd)
 483 {
 484         /*
 485          * For now, we simply always add the simplefb DT node. Later, we
 486          * should be more intelligent, and e.g. only do this if no enabled DT
 487          * node exists for the "real" graphics driver.
 488          */
 489         lcd_dt_simplefb_add_node(blob);
 490
 491 #ifdef CONFIG_EFI_LOADER
 492         /* Reserve the spin table */
 493         efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 494 #endif
 495
 496         return 0;
 497 }