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 <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/sdhci.h>
  19 #include <asm/global_data.h>
  20 #include <dm/platform_data/serial_bcm283x_mu.h>
  21 #ifdef CONFIG_ARM64
  22 #include <asm/armv8/mmu.h>
  23 #endif
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 /* From lowlevel_init.S */
  28 extern unsigned long fw_dtb_pointer;
  29
  30
  31 struct msg_get_arm_mem {
  32         struct bcm2835_mbox_hdr hdr;
  33         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  34         u32 end_tag;
  35 };
  36
  37 struct msg_get_board_rev {
  38         struct bcm2835_mbox_hdr hdr;
  39         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  40         u32 end_tag;
  41 };
  42
  43 struct msg_get_board_serial {
  44         struct bcm2835_mbox_hdr hdr;
  45         struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  46         u32 end_tag;
  47 };
  48
  49 struct msg_get_mac_address {
  50         struct bcm2835_mbox_hdr hdr;
  51         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  52         u32 end_tag;
  53 };
  54
  55 struct msg_set_power_state {
  56         struct bcm2835_mbox_hdr hdr;
  57         struct bcm2835_mbox_tag_set_power_state set_power_state;
  58         u32 end_tag;
  59 };
  60
  61 struct msg_get_clock_rate {
  62         struct bcm2835_mbox_hdr hdr;
  63         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  64         u32 end_tag;
  65 };
  66
  67 /*
  68  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
  69  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
  70  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
  71  *
  72  * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
  73  * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
  74  * Foundation stated that the following source was accurate:
  75  * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
  76  */
  77 struct rpi_model {
  78         const char *name;
  79         const char *fdtfile;
  80         bool has_onboard_eth;
  81 };
  82
  83 static const struct rpi_model rpi_model_unknown = {
  84         "Unknown model",
  85         "bcm283x-rpi-other.dtb",
  86         false,
  87 };
  88
  89 static const struct rpi_model rpi_models_new_scheme[] = {
  90         [0x4] = {
  91                 "2 Model B",
  92                 "bcm2836-rpi-2-b.dtb",
  93                 true,
  94         },
  95         [0x8] = {
  96                 "3 Model B",
  97                 "bcm2837-rpi-3-b.dtb",
  98                 true,
  99         },
 100         [0x9] = {
 101                 "Zero",
 102                 "bcm2835-rpi-zero.dtb",
 103                 false,
 104         },
 105 };
 106
 107 static const struct rpi_model rpi_models_old_scheme[] = {
 108         [0x2] = {
 109                 "Model B",
 110                 "bcm2835-rpi-b.dtb",
 111                 true,
 112         },
 113         [0x3] = {
 114                 "Model B",
 115                 "bcm2835-rpi-b.dtb",
 116                 true,
 117         },
 118         [0x4] = {
 119                 "Model B rev2",
 120                 "bcm2835-rpi-b-rev2.dtb",
 121                 true,
 122         },
 123         [0x5] = {
 124                 "Model B rev2",
 125                 "bcm2835-rpi-b-rev2.dtb",
 126                 true,
 127         },
 128         [0x6] = {
 129                 "Model B rev2",
 130                 "bcm2835-rpi-b-rev2.dtb",
 131                 true,
 132         },
 133         [0x7] = {
 134                 "Model A",
 135                 "bcm2835-rpi-a.dtb",
 136                 false,
 137         },
 138         [0x8] = {
 139                 "Model A",
 140                 "bcm2835-rpi-a.dtb",
 141                 false,
 142         },
 143         [0x9] = {
 144                 "Model A",
 145                 "bcm2835-rpi-a.dtb",
 146                 false,
 147         },
 148         [0xd] = {
 149                 "Model B rev2",
 150                 "bcm2835-rpi-b-rev2.dtb",
 151                 true,
 152         },
 153         [0xe] = {
 154                 "Model B rev2",
 155                 "bcm2835-rpi-b-rev2.dtb",
 156                 true,
 157         },
 158         [0xf] = {
 159                 "Model B rev2",
 160                 "bcm2835-rpi-b-rev2.dtb",
 161                 true,
 162         },
 163         [0x10] = {
 164                 "Model B+",
 165                 "bcm2835-rpi-b-plus.dtb",
 166                 true,
 167         },
 168         [0x11] = {
 169                 "Compute Module",
 170                 "bcm2835-rpi-cm.dtb",
 171                 false,
 172         },
 173         [0x12] = {
 174                 "Model A+",
 175                 "bcm2835-rpi-a-plus.dtb",
 176                 false,
 177         },
 178         [0x13] = {
 179                 "Model B+",
 180                 "bcm2835-rpi-b-plus.dtb",
 181                 true,
 182         },
 183         [0x14] = {
 184                 "Compute Module",
 185                 "bcm2835-rpi-cm.dtb",
 186                 false,
 187         },
 188         [0x15] = {
 189                 "Model A+",
 190                 "bcm2835-rpi-a-plus.dtb",
 191                 false,
 192         },
 193 };
 194
 195 static uint32_t revision;
 196 static uint32_t rev_scheme;
 197 static uint32_t rev_type;
 198 static const struct rpi_model *model;
 199
 200 #ifdef CONFIG_ARM64
 201 static struct mm_region bcm2837_mem_map[] = {
 202         {
 203                 .virt = 0x00000000UL,
 204                 .phys = 0x00000000UL,
 205                 .size = 0x3f000000UL,
 206                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 207                          PTE_BLOCK_INNER_SHARE
 208         }, {
 209                 .virt = 0x3f000000UL,
 210                 .phys = 0x3f000000UL,
 211                 .size = 0x01000000UL,
 212                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 213                          PTE_BLOCK_NON_SHARE |
 214                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 215         }, {
 216                 /* List terminator */
 217                 0,
 218         }
 219 };
 220
 221 struct mm_region *mem_map = bcm2837_mem_map;
 222 #endif
 223
 224 int dram_init(void)
 225 {
 226         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 227         int ret;
 228
 229         BCM2835_MBOX_INIT_HDR(msg);
 230         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 231
 232         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 233         if (ret) {
 234                 printf("bcm2835: Could not query ARM memory size\n");
 235                 return -1;
 236         }
 237
 238         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 239
 240         return 0;
 241 }
 242
 243 static void set_fdtfile(void)
 244 {
 245         const char *fdtfile;
 246
 247         if (getenv("fdtfile"))
 248                 return;
 249
 250         fdtfile = model->fdtfile;
 251         setenv("fdtfile", fdtfile);
 252 }
 253
 254 /*
 255  * If the firmware provided a valid FDT at boot time, let's expose it in
 256  * ${fdt_addr} so it may be passed unmodified to the kernel.
 257  */
 258 static void set_fdt_addr(void)
 259 {
 260         if (getenv("fdt_addr"))
 261                 return;
 262
 263         if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
 264                 return;
 265
 266         setenv_hex("fdt_addr", fw_dtb_pointer);
 267 }
 268
 269 /*
 270  * Prevent relocation from stomping on a firmware provided FDT blob.
 271  */
 272 unsigned long board_get_usable_ram_top(unsigned long total_size)
 273 {
 274         if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
 275                 return gd->ram_top;
 276         return fw_dtb_pointer & ~0xffff;
 277 }
 278
 279 static void set_usbethaddr(void)
 280 {
 281         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 282         int ret;
 283
 284         if (!model->has_onboard_eth)
 285                 return;
 286
 287         if (getenv("usbethaddr"))
 288                 return;
 289
 290         BCM2835_MBOX_INIT_HDR(msg);
 291         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 292
 293         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 294         if (ret) {
 295                 printf("bcm2835: Could not query MAC address\n");
 296                 /* Ignore error; not critical */
 297                 return;
 298         }
 299
 300         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 301
 302         if (!getenv("ethaddr"))
 303                 setenv("ethaddr", getenv("usbethaddr"));
 304
 305         return;
 306 }
 307
 308 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 309 static void set_board_info(void)
 310 {
 311         char s[11];
 312
 313         snprintf(s, sizeof(s), "0x%X", revision);
 314         setenv("board_revision", s);
 315         snprintf(s, sizeof(s), "%d", rev_scheme);
 316         setenv("board_rev_scheme", s);
 317         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 318         snprintf(s, sizeof(s), "0x%X", rev_type);
 319         setenv("board_rev", s);
 320         setenv("board_name", model->name);
 321 }
 322 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 323
 324 static void set_serial_number(void)
 325 {
 326         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 327         int ret;
 328         char serial_string[17] = { 0 };
 329
 330         if (getenv("serial#"))
 331                 return;
 332
 333         BCM2835_MBOX_INIT_HDR(msg);
 334         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 335
 336         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 337         if (ret) {
 338                 printf("bcm2835: Could not query board serial\n");
 339                 /* Ignore error; not critical */
 340                 return;
 341         }
 342
 343         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 344                  msg->get_board_serial.body.resp.serial);
 345         setenv("serial#", serial_string);
 346 }
 347
 348 int misc_init_r(void)
 349 {
 350         set_fdt_addr();
 351         set_fdtfile();
 352         set_usbethaddr();
 353 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 354         set_board_info();
 355 #endif
 356         set_serial_number();
 357
 358         return 0;
 359 }
 360
 361 static int power_on_module(u32 module)
 362 {
 363         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 364         int ret;
 365
 366         BCM2835_MBOX_INIT_HDR(msg_pwr);
 367         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 368                               SET_POWER_STATE);
 369         msg_pwr->set_power_state.body.req.device_id = module;
 370         msg_pwr->set_power_state.body.req.state =
 371                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 372                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 373
 374         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 375                                      &msg_pwr->hdr);
 376         if (ret) {
 377                 printf("bcm2835: Could not set module %u power state\n",
 378                        module);
 379                 return -1;
 380         }
 381
 382         return 0;
 383 }
 384
 385 static void get_board_rev(void)
 386 {
 387         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 388         int ret;
 389         const struct rpi_model *models;
 390         uint32_t models_count;
 391
 392         BCM2835_MBOX_INIT_HDR(msg);
 393         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 394
 395         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 396         if (ret) {
 397                 printf("bcm2835: Could not query board revision\n");
 398                 /* Ignore error; not critical */
 399                 return;
 400         }
 401
 402         /*
 403          * For details of old-vs-new scheme, see:
 404          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 405          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 406          * (a few posts down)
 407          *
 408          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 409          * lower byte to use as the board rev:
 410          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 411          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 412          */
 413         revision = msg->get_board_rev.body.resp.rev;
 414         if (revision & 0x800000) {
 415                 rev_scheme = 1;
 416                 rev_type = (revision >> 4) & 0xff;
 417                 models = rpi_models_new_scheme;
 418                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 419         } else {
 420                 rev_scheme = 0;
 421                 rev_type = revision & 0xff;
 422                 models = rpi_models_old_scheme;
 423                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 424         }
 425         if (rev_type >= models_count) {
 426                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 427                 model = &rpi_model_unknown;
 428         } else if (!models[rev_type].name) {
 429                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 430                 model = &rpi_model_unknown;
 431         } else {
 432                 model = &models[rev_type];
 433         }
 434
 435         printf("RPI %s (0x%x)\n", model->name, revision);
 436 }
 437
 438 #ifndef CONFIG_PL01X_SERIAL
 439 static bool rpi_is_serial_active(void)
 440 {
 441         int serial_gpio = 15;
 442         struct udevice *dev;
 443
 444         /*
 445          * The RPi3 disables the mini uart by default. The easiest way to find
 446          * out whether it is available is to check if the RX pin is muxed.
 447          */
 448
 449         if (uclass_first_device(UCLASS_GPIO, &dev) || !dev)
 450                 return true;
 451
 452         if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5)
 453                 return false;
 454
 455         return true;
 456 }
 457
 458 /* Disable mini-UART I/O if it's not pinmuxed to our pins.
 459  * The firmware only enables it if explicitly done in config.txt: enable_uart=1
 460  */
 461 static void rpi_disable_inactive_uart(void)
 462 {
 463         struct udevice *dev;
 464         struct bcm283x_mu_serial_platdata *plat;
 465
 466         if (uclass_get_device_by_driver(UCLASS_SERIAL,
 467                                         DM_GET_DRIVER(serial_bcm283x_mu),
 468                                         &dev) || !dev)
 469                 return;
 470
 471         if (!rpi_is_serial_active()) {
 472                 plat = dev_get_platdata(dev);
 473                 plat->disabled = true;
 474         }
 475 }
 476 #endif
 477
 478 int board_init(void)
 479 {
 480 #ifndef CONFIG_PL01X_SERIAL
 481         rpi_disable_inactive_uart();
 482 #endif
 483
 484         get_board_rev();
 485
 486         gd->bd->bi_boot_params = 0x100;
 487
 488         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 489 }
 490
 491 int board_mmc_init(bd_t *bis)
 492 {
 493         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 494         int ret;
 495
 496         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 497
 498         BCM2835_MBOX_INIT_HDR(msg_clk);
 499         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 500         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 501
 502         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 503         if (ret) {
 504                 printf("bcm2835: Could not query eMMC clock rate\n");
 505                 return -1;
 506         }
 507
 508         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 509                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 510 }
 511
 512 int ft_board_setup(void *blob, bd_t *bd)
 513 {
 514         /*
 515          * For now, we simply always add the simplefb DT node. Later, we
 516          * should be more intelligent, and e.g. only do this if no enabled DT
 517          * node exists for the "real" graphics driver.
 518          */
 519         lcd_dt_simplefb_add_node(blob);
 520
 521         return 0;
 522 }