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/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
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 /* From lowlevel_init.S */
  29 extern unsigned long fw_dtb_pointer;
  30
  31
  32 struct msg_get_arm_mem {
  33         struct bcm2835_mbox_hdr hdr;
  34         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  35         u32 end_tag;
  36 };
  37
  38 struct msg_get_board_rev {
  39         struct bcm2835_mbox_hdr hdr;
  40         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  41         u32 end_tag;
  42 };
  43
  44 struct msg_get_board_serial {
  45         struct bcm2835_mbox_hdr hdr;
  46         struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  47         u32 end_tag;
  48 };
  49
  50 struct msg_get_mac_address {
  51         struct bcm2835_mbox_hdr hdr;
  52         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  53         u32 end_tag;
  54 };
  55
  56 struct msg_set_power_state {
  57         struct bcm2835_mbox_hdr hdr;
  58         struct bcm2835_mbox_tag_set_power_state set_power_state;
  59         u32 end_tag;
  60 };
  61
  62 struct msg_get_clock_rate {
  63         struct bcm2835_mbox_hdr hdr;
  64         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  65         u32 end_tag;
  66 };
  67
  68 #ifdef CONFIG_ARM64
  69 #define DTB_DIR "broadcom/"
  70 #else
  71 #define DTB_DIR ""
  72 #endif
  73
  74 /*
  75  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
  76  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
  77  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
  78  *
  79  * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
  80  * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
  81  * Foundation stated that the following source was accurate:
  82  * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
  83  */
  84 struct rpi_model {
  85         const char *name;
  86         const char *fdtfile;
  87         bool has_onboard_eth;
  88 };
  89
  90 static const struct rpi_model rpi_model_unknown = {
  91         "Unknown model",
  92         DTB_DIR "bcm283x-rpi-other.dtb",
  93         false,
  94 };
  95
  96 static const struct rpi_model rpi_models_new_scheme[] = {
  97         [0x4] = {
  98                 "2 Model B",
  99                 DTB_DIR "bcm2836-rpi-2-b.dtb",
 100                 true,
 101         },
 102         [0x8] = {
 103                 "3 Model B",
 104                 DTB_DIR "bcm2837-rpi-3-b.dtb",
 105                 true,
 106         },
 107         [0x9] = {
 108                 "Zero",
 109                 DTB_DIR "bcm2835-rpi-zero.dtb",
 110                 false,
 111         },
 112 };
 113
 114 static const struct rpi_model rpi_models_old_scheme[] = {
 115         [0x2] = {
 116                 "Model B",
 117                 DTB_DIR "bcm2835-rpi-b.dtb",
 118                 true,
 119         },
 120         [0x3] = {
 121                 "Model B",
 122                 DTB_DIR "bcm2835-rpi-b.dtb",
 123                 true,
 124         },
 125         [0x4] = {
 126                 "Model B rev2",
 127                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 128                 true,
 129         },
 130         [0x5] = {
 131                 "Model B rev2",
 132                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 133                 true,
 134         },
 135         [0x6] = {
 136                 "Model B rev2",
 137                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 138                 true,
 139         },
 140         [0x7] = {
 141                 "Model A",
 142                 DTB_DIR "bcm2835-rpi-a.dtb",
 143                 false,
 144         },
 145         [0x8] = {
 146                 "Model A",
 147                 DTB_DIR "bcm2835-rpi-a.dtb",
 148                 false,
 149         },
 150         [0x9] = {
 151                 "Model A",
 152                 DTB_DIR "bcm2835-rpi-a.dtb",
 153                 false,
 154         },
 155         [0xd] = {
 156                 "Model B rev2",
 157                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 158                 true,
 159         },
 160         [0xe] = {
 161                 "Model B rev2",
 162                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 163                 true,
 164         },
 165         [0xf] = {
 166                 "Model B rev2",
 167                 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
 168                 true,
 169         },
 170         [0x10] = {
 171                 "Model B+",
 172                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 173                 true,
 174         },
 175         [0x11] = {
 176                 "Compute Module",
 177                 DTB_DIR "bcm2835-rpi-cm.dtb",
 178                 false,
 179         },
 180         [0x12] = {
 181                 "Model A+",
 182                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 183                 false,
 184         },
 185         [0x13] = {
 186                 "Model B+",
 187                 DTB_DIR "bcm2835-rpi-b-plus.dtb",
 188                 true,
 189         },
 190         [0x14] = {
 191                 "Compute Module",
 192                 DTB_DIR "bcm2835-rpi-cm.dtb",
 193                 false,
 194         },
 195         [0x15] = {
 196                 "Model A+",
 197                 DTB_DIR "bcm2835-rpi-a-plus.dtb",
 198                 false,
 199         },
 200 };
 201
 202 static uint32_t revision;
 203 static uint32_t rev_scheme;
 204 static uint32_t rev_type;
 205 static const struct rpi_model *model;
 206
 207 #ifdef CONFIG_ARM64
 208 static struct mm_region bcm2837_mem_map[] = {
 209         {
 210                 .virt = 0x00000000UL,
 211                 .phys = 0x00000000UL,
 212                 .size = 0x3f000000UL,
 213                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 214                          PTE_BLOCK_INNER_SHARE
 215         }, {
 216                 .virt = 0x3f000000UL,
 217                 .phys = 0x3f000000UL,
 218                 .size = 0x01000000UL,
 219                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 220                          PTE_BLOCK_NON_SHARE |
 221                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 222         }, {
 223                 /* List terminator */
 224                 0,
 225         }
 226 };
 227
 228 struct mm_region *mem_map = bcm2837_mem_map;
 229 #endif
 230
 231 int dram_init(void)
 232 {
 233         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 234         int ret;
 235
 236         BCM2835_MBOX_INIT_HDR(msg);
 237         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 238
 239         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 240         if (ret) {
 241                 printf("bcm2835: Could not query ARM memory size\n");
 242                 return -1;
 243         }
 244
 245         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 246
 247         return 0;
 248 }
 249
 250 static void set_fdtfile(void)
 251 {
 252         const char *fdtfile;
 253
 254         if (getenv("fdtfile"))
 255                 return;
 256
 257         fdtfile = model->fdtfile;
 258         setenv("fdtfile", fdtfile);
 259 }
 260
 261 /*
 262  * If the firmware provided a valid FDT at boot time, let's expose it in
 263  * ${fdt_addr} so it may be passed unmodified to the kernel.
 264  */
 265 static void set_fdt_addr(void)
 266 {
 267         if (getenv("fdt_addr"))
 268                 return;
 269
 270         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 271                 return;
 272
 273         setenv_hex("fdt_addr", fw_dtb_pointer);
 274 }
 275
 276 /*
 277  * Prevent relocation from stomping on a firmware provided FDT blob.
 278  */
 279 unsigned long board_get_usable_ram_top(unsigned long total_size)
 280 {
 281         if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 282                 return gd->ram_top;
 283         return fw_dtb_pointer & ~0xffff;
 284 }
 285
 286 static void set_usbethaddr(void)
 287 {
 288         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 289         int ret;
 290
 291         if (!model->has_onboard_eth)
 292                 return;
 293
 294         if (getenv("usbethaddr"))
 295                 return;
 296
 297         BCM2835_MBOX_INIT_HDR(msg);
 298         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 299
 300         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 301         if (ret) {
 302                 printf("bcm2835: Could not query MAC address\n");
 303                 /* Ignore error; not critical */
 304                 return;
 305         }
 306
 307         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 308
 309         if (!getenv("ethaddr"))
 310                 setenv("ethaddr", getenv("usbethaddr"));
 311
 312         return;
 313 }
 314
 315 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 316 static void set_board_info(void)
 317 {
 318         char s[11];
 319
 320         snprintf(s, sizeof(s), "0x%X", revision);
 321         setenv("board_revision", s);
 322         snprintf(s, sizeof(s), "%d", rev_scheme);
 323         setenv("board_rev_scheme", s);
 324         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 325         snprintf(s, sizeof(s), "0x%X", rev_type);
 326         setenv("board_rev", s);
 327         setenv("board_name", model->name);
 328 }
 329 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 330
 331 static void set_serial_number(void)
 332 {
 333         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 334         int ret;
 335         char serial_string[17] = { 0 };
 336
 337         if (getenv("serial#"))
 338                 return;
 339
 340         BCM2835_MBOX_INIT_HDR(msg);
 341         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 342
 343         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 344         if (ret) {
 345                 printf("bcm2835: Could not query board serial\n");
 346                 /* Ignore error; not critical */
 347                 return;
 348         }
 349
 350         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 351                  msg->get_board_serial.body.resp.serial);
 352         setenv("serial#", serial_string);
 353 }
 354
 355 int misc_init_r(void)
 356 {
 357         set_fdt_addr();
 358         set_fdtfile();
 359         set_usbethaddr();
 360 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 361         set_board_info();
 362 #endif
 363         set_serial_number();
 364
 365         return 0;
 366 }
 367
 368 static int power_on_module(u32 module)
 369 {
 370         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 371         int ret;
 372
 373         BCM2835_MBOX_INIT_HDR(msg_pwr);
 374         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 375                               SET_POWER_STATE);
 376         msg_pwr->set_power_state.body.req.device_id = module;
 377         msg_pwr->set_power_state.body.req.state =
 378                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 379                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 380
 381         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 382                                      &msg_pwr->hdr);
 383         if (ret) {
 384                 printf("bcm2835: Could not set module %u power state\n",
 385                        module);
 386                 return -1;
 387         }
 388
 389         return 0;
 390 }
 391
 392 static void get_board_rev(void)
 393 {
 394         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 395         int ret;
 396         const struct rpi_model *models;
 397         uint32_t models_count;
 398
 399         BCM2835_MBOX_INIT_HDR(msg);
 400         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 401
 402         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 403         if (ret) {
 404                 printf("bcm2835: Could not query board revision\n");
 405                 /* Ignore error; not critical */
 406                 return;
 407         }
 408
 409         /*
 410          * For details of old-vs-new scheme, see:
 411          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 412          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 413          * (a few posts down)
 414          *
 415          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 416          * lower byte to use as the board rev:
 417          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 418          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 419          */
 420         revision = msg->get_board_rev.body.resp.rev;
 421         if (revision & 0x800000) {
 422                 rev_scheme = 1;
 423                 rev_type = (revision >> 4) & 0xff;
 424                 models = rpi_models_new_scheme;
 425                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 426         } else {
 427                 rev_scheme = 0;
 428                 rev_type = revision & 0xff;
 429                 models = rpi_models_old_scheme;
 430                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 431         }
 432         if (rev_type >= models_count) {
 433                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 434                 model = &rpi_model_unknown;
 435         } else if (!models[rev_type].name) {
 436                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 437                 model = &rpi_model_unknown;
 438         } else {
 439                 model = &models[rev_type];
 440         }
 441
 442         printf("RPI %s (0x%x)\n", model->name, revision);
 443 }
 444
 445 #ifndef CONFIG_PL01X_SERIAL
 446 static bool rpi_is_serial_active(void)
 447 {
 448         int serial_gpio = 15;
 449         struct udevice *dev;
 450
 451         /*
 452          * The RPi3 disables the mini uart by default. The easiest way to find
 453          * out whether it is available is to check if the RX pin is muxed.
 454          */
 455
 456         if (uclass_first_device(UCLASS_GPIO, &dev) || !dev)
 457                 return true;
 458
 459         if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5)
 460                 return false;
 461
 462         return true;
 463 }
 464
 465 /* Disable mini-UART I/O if it's not pinmuxed to our pins.
 466  * The firmware only enables it if explicitly done in config.txt: enable_uart=1
 467  */
 468 static void rpi_disable_inactive_uart(void)
 469 {
 470         struct udevice *dev;
 471         struct bcm283x_mu_serial_platdata *plat;
 472
 473         if (uclass_get_device_by_driver(UCLASS_SERIAL,
 474                                         DM_GET_DRIVER(serial_bcm283x_mu),
 475                                         &dev) || !dev)
 476                 return;
 477
 478         if (!rpi_is_serial_active()) {
 479                 plat = dev_get_platdata(dev);
 480                 plat->disabled = true;
 481         }
 482 }
 483 #endif
 484
 485 int board_init(void)
 486 {
 487 #ifndef CONFIG_PL01X_SERIAL
 488         rpi_disable_inactive_uart();
 489 #endif
 490
 491         get_board_rev();
 492
 493         gd->bd->bi_boot_params = 0x100;
 494
 495         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 496 }
 497
 498 int board_mmc_init(bd_t *bis)
 499 {
 500         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 501         int ret;
 502
 503         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 504
 505         BCM2835_MBOX_INIT_HDR(msg_clk);
 506         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 507         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 508
 509         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 510         if (ret) {
 511                 printf("bcm2835: Could not query eMMC clock rate\n");
 512                 return -1;
 513         }
 514
 515         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 516                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 517 }
 518
 519 int ft_board_setup(void *blob, bd_t *bd)
 520 {
 521         /*
 522          * For now, we simply always add the simplefb DT node. Later, we
 523          * should be more intelligent, and e.g. only do this if no enabled DT
 524          * node exists for the "real" graphics driver.
 525          */
 526         lcd_dt_simplefb_add_node(blob);
 527
 528 #ifdef CONFIG_EFI_LOADER
 529         /* Reserve the spin table */
 530         efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
 531 #endif
 532
 533         return 0;
 534 }