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 <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
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 /* From lowlevel_init.S */
  32 extern unsigned long fw_dtb_pointer;
  33
  34 /* TODO(sjg@chromium.org): Move these to the msg.c file */
  35 struct 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
  41 struct 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
  47 struct 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
  53 struct 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
  59 struct 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  */
  81 struct rpi_model {
  82         const char *name;
  83         const char *fdtfile;
  84         bool has_onboard_eth;
  85 };
  86
  87 static const struct rpi_model rpi_model_unknown = {
  88         "Unknown model",
  89         DTB_DIR "bcm283x-rpi-other.dtb",
  90         false,
  91 };
  92
  93 static const struct rpi_model rpi_models_new_scheme[] = {
  94         [0x4] = {
  95                 "2 Model B",
  96                 DTB_DIR "bcm2836-rpi-2-b.dtb",
  97                 true,
  98         },
  99         [0x8] = {
 100                 "3 Model B",
 101                 DTB_DIR "bcm2837-rpi-3-b.dtb",
 102                 true,
 103         },
 104         [0x9] = {
 105                 "Zero",
 106                 DTB_DIR "bcm2835-rpi-zero.dtb",
 107                 false,
 108         },
 109         [0xC] = {
 110                 "Zero W",
 111                 DTB_DIR "bcm2835-rpi-zero-w.dtb",
 112                 false,
 113         },
 114 };
 115
 116 static const struct rpi_model rpi_models_old_scheme[] = {
 117         [0x2] = {
 118                 "Model B",
 119                 DTB_DIR "bcm2835-rpi-b.dtb",
 120                 true,
 121         },
 122         [0x3] = {
 123                 "Model B",
 124                 DTB_DIR "bcm2835-rpi-b.dtb",
 125                 true,
 126         },
 127         [0x4] = {
 128                 "Model B rev2",
 129                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 130                 true,
 131         },
 132         [0x5] = {
 133                 "Model B rev2",
 134                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 135                 true,
 136         },
 137         [0x6] = {
 138                 "Model B rev2",
 139                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 140                 true,
 141         },
 142         [0x7] = {
 143                 "Model A",
 144                 DTB_DIR "bcm2835-rpi-a.dtb",
 145                 false,
 146         },
 147         [0x8] = {
 148                 "Model A",
 149                 DTB_DIR "bcm2835-rpi-a.dtb",
 150                 false,
 151         },
 152         [0x9] = {
 153                 "Model A",
 154                 DTB_DIR "bcm2835-rpi-a.dtb",
 155                 false,
 156         },
 157         [0xd] = {
 158                 "Model B rev2",
 159                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 160                 true,
 161         },
 162         [0xe] = {
 163                 "Model B rev2",
 164                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 165                 true,
 166         },
 167         [0xf] = {
 168                 "Model B rev2",
 169                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 170                 true,
 171         },
 172         [0x10] = {
 173                 "Model B+",
 174                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 175                 true,
 176         },
 177         [0x11] = {
 178                 "Compute Module",
 179                 DTB_DIR "bcm2835-rpi-cm.dtb",
 180                 false,
 181         },
 182         [0x12] = {
 183                 "Model A+",
 184                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 185                 false,
 186         },
 187         [0x13] = {
 188                 "Model B+",
 189                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 190                 true,
 191         },
 192         [0x14] = {
 193                 "Compute Module",
 194                 DTB_DIR "bcm2835-rpi-cm.dtb",
 195                 false,
 196         },
 197         [0x15] = {
 198                 "Model A+",
 199                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 200                 false,
 201         },
 202 };
 203
 204 static uint32_t revision;
 205 static uint32_t rev_scheme;
 206 static uint32_t rev_type;
 207 static const struct rpi_model *model;
 208
 209 #ifdef CONFIG_ARM64
 210 static struct mm_region bcm2837_mem_map[] = {
 211         {
 212                 .virt = 0x00000000UL,
 213                 .phys = 0x00000000UL,
 214                 .size = 0x3f000000UL,
 215                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 216                          PTE_BLOCK_INNER_SHARE
 217         }, {
 218                 .virt = 0x3f000000UL,
 219                 .phys = 0x3f000000UL,
 220                 .size = 0x01000000UL,
 221                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 222                          PTE_BLOCK_NON_SHARE |
 223                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 224         }, {
 225                 /* List terminator */
 226                 0,
 227         }
 228 };
 229
 230 struct mm_region *mem_map = bcm2837_mem_map;
 231 #endif
 232
 233 int dram_init(void)
 234 {
 235         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 236         int ret;
 237
 238         BCM2835_MBOX_INIT_HDR(msg);
 239         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 240
 241         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 242         if (ret) {
 243                 printf("bcm2835: Could not query ARM memory size\n");
 244                 return -1;
 245         }
 246
 247         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 248
 249         return 0;
 250 }
 251
 252 static void set_fdtfile(void)
 253 {
 254         const char *fdtfile;
 255
 256         if (env_get("fdtfile"))
 257                 return;
 258
 259         fdtfile = model->fdtfile;
 260         env_set("fdtfile", fdtfile);
 261 }
 262
 263 /*
 264  * If the firmware provided a valid FDT at boot time, let's expose it in
 265  * ${fdt_addr} so it may be passed unmodified to the kernel.
 266  */
 267 static void set_fdt_addr(void)
 268 {
 269         if (env_get("fdt_addr"))
 270                 return;
 271
 272         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 273                 return;
 274
 275         env_set_hex("fdt_addr", fw_dtb_pointer);
 276 }
 277
 278 /*
 279  * Prevent relocation from stomping on a firmware provided FDT blob.
 280  */
 281 unsigned long board_get_usable_ram_top(unsigned long total_size)
 282 {
 283         if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 284                 return gd->ram_top;
 285         return fw_dtb_pointer & ~0xffff;
 286 }
 287
 288 static void set_usbethaddr(void)
 289 {
 290         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 291         int ret;
 292
 293         if (!model->has_onboard_eth)
 294                 return;
 295
 296         if (env_get("usbethaddr"))
 297                 return;
 298
 299         BCM2835_MBOX_INIT_HDR(msg);
 300         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 301
 302         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 303         if (ret) {
 304                 printf("bcm2835: Could not query MAC address\n");
 305                 /* Ignore error; not critical */
 306                 return;
 307         }
 308
 309         eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 310
 311         if (!env_get("ethaddr"))
 312                 env_set("ethaddr", env_get("usbethaddr"));
 313
 314         return;
 315 }
 316
 317 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 318 static void set_board_info(void)
 319 {
 320         char s[11];
 321
 322         snprintf(s, sizeof(s), "0x%X", revision);
 323         env_set("board_revision", s);
 324         snprintf(s, sizeof(s), "%d", rev_scheme);
 325         env_set("board_rev_scheme", s);
 326         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 327         snprintf(s, sizeof(s), "0x%X", rev_type);
 328         env_set("board_rev", s);
 329         env_set("board_name", model->name);
 330 }
 331 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 332
 333 static void set_serial_number(void)
 334 {
 335         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 336         int ret;
 337         char serial_string[17] = { 0 };
 338
 339         if (env_get("serial#"))
 340                 return;
 341
 342         BCM2835_MBOX_INIT_HDR(msg);
 343         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 344
 345         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 346         if (ret) {
 347                 printf("bcm2835: Could not query board serial\n");
 348                 /* Ignore error; not critical */
 349                 return;
 350         }
 351
 352         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 353                  msg->get_board_serial.body.resp.serial);
 354         env_set("serial#", serial_string);
 355 }
 356
 357 int misc_init_r(void)
 358 {
 359         set_fdt_addr();
 360         set_fdtfile();
 361         set_usbethaddr();
 362 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 363         set_board_info();
 364 #endif
 365         set_serial_number();
 366
 367         return 0;
 368 }
 369
 370 static void get_board_rev(void)
 371 {
 372         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 373         int ret;
 374         const struct rpi_model *models;
 375         uint32_t models_count;
 376
 377         BCM2835_MBOX_INIT_HDR(msg);
 378         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 379
 380         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 381         if (ret) {
 382                 printf("bcm2835: Could not query board revision\n");
 383                 /* Ignore error; not critical */
 384                 return;
 385         }
 386
 387         /*
 388          * For details of old-vs-new scheme, see:
 389          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 390          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 391          * (a few posts down)
 392          *
 393          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 394          * lower byte to use as the board rev:
 395          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 396          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 397          */
 398         revision = msg->get_board_rev.body.resp.rev;
 399         if (revision & 0x800000) {
 400                 rev_scheme = 1;
 401                 rev_type = (revision >> 4) & 0xff;
 402                 models = rpi_models_new_scheme;
 403                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 404         } else {
 405                 rev_scheme = 0;
 406                 rev_type = revision & 0xff;
 407                 models = rpi_models_old_scheme;
 408                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 409         }
 410         if (rev_type >= models_count) {
 411                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 412                 model = &rpi_model_unknown;
 413         } else if (!models[rev_type].name) {
 414                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 415                 model = &rpi_model_unknown;
 416         } else {
 417                 model = &models[rev_type];
 418         }
 419
 420         printf("RPI %s (0x%x)\n", model->name, revision);
 421 }
 422
 423 int board_init(void)
 424 {
 425 #ifdef CONFIG_HW_WATCHDOG
 426         hw_watchdog_init();
 427 #endif
 428
 429         get_board_rev();
 430
 431         gd->bd->bi_boot_params = 0x100;
 432
 433         return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 434 }
 435
 436 /*
 437  * If the firmware passed a device tree use it for U-Boot.
 438  */
 439 void *board_fdt_blob_setup(void)
 440 {
 441         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 442                 return NULL;
 443         return (void *)fw_dtb_pointer;
 444 }
 445
 446 int ft_board_setup(void *blob, bd_t *bd)
 447 {
 448         /*
 449          * For now, we simply always add the simplefb DT node. Later, we
 450          * should be more intelligent, and e.g. only do this if no enabled DT
 451          * node exists for the "real" graphics driver.
 452          */
 453         lcd_dt_simplefb_add_node(blob);
 454
 455 #ifdef CONFIG_EFI_LOADER
 456         /* Reserve the spin table */
 457         efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 458 #endif
 459
 460         return 0;
 461 }