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_pl01x.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 static const struct bcm2835_gpio_platdata gpio_platdata = {
  29         .base = BCM2835_GPIO_BASE,
  30 };
  31
  32 U_BOOT_DEVICE(bcm2835_gpios) = {
  33         .name = "gpio_bcm2835",
  34         .platdata = &gpio_platdata,
  35 };
  36
  37 #ifdef CONFIG_PL01X_SERIAL
  38 static const struct pl01x_serial_platdata serial_platdata = {
  39 #ifndef CONFIG_BCM2835
  40         .base = 0x3f201000,
  41 #else
  42         .base = 0x20201000,
  43 #endif
  44         .type = TYPE_PL011,
  45         .skip_init = true,
  46 };
  47
  48 U_BOOT_DEVICE(bcm2835_serials) = {
  49         .name = "serial_pl01x",
  50         .platdata = &serial_platdata,
  51 };
  52 #else
  53 static const struct bcm283x_mu_serial_platdata serial_platdata = {
  54         .base = 0x3f215040,
  55         .clock = 250000000,
  56         .skip_init = true,
  57 };
  58
  59 U_BOOT_DEVICE(bcm2837_serials) = {
  60         .name = "serial_bcm283x_mu",
  61         .platdata = &serial_platdata,
  62 };
  63 #endif
  64
  65 struct msg_get_arm_mem {
  66         struct bcm2835_mbox_hdr hdr;
  67         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  68         u32 end_tag;
  69 };
  70
  71 struct msg_get_board_rev {
  72         struct bcm2835_mbox_hdr hdr;
  73         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  74         u32 end_tag;
  75 };
  76
  77 struct msg_get_board_serial {
  78         struct bcm2835_mbox_hdr hdr;
  79         struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  80         u32 end_tag;
  81 };
  82
  83 struct msg_get_mac_address {
  84         struct bcm2835_mbox_hdr hdr;
  85         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  86         u32 end_tag;
  87 };
  88
  89 struct msg_set_power_state {
  90         struct bcm2835_mbox_hdr hdr;
  91         struct bcm2835_mbox_tag_set_power_state set_power_state;
  92         u32 end_tag;
  93 };
  94
  95 struct msg_get_clock_rate {
  96         struct bcm2835_mbox_hdr hdr;
  97         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  98         u32 end_tag;
  99 };
 100
 101 /*
 102  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
 103  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
 104  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
 105  *
 106  * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
 107  * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
 108  * Foundation stated that the following source was accurate:
 109  * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
 110  */
 111 struct rpi_model {
 112         const char *name;
 113         const char *fdtfile;
 114         bool has_onboard_eth;
 115 };
 116
 117 static const struct rpi_model rpi_model_unknown = {
 118         "Unknown model",
 119         "bcm283x-rpi-other.dtb",
 120         false,
 121 };
 122
 123 static const struct rpi_model rpi_models_new_scheme[] = {
 124         [0x4] = {
 125                 "2 Model B",
 126                 "bcm2836-rpi-2-b.dtb",
 127                 true,
 128         },
 129         [0x8] = {
 130                 "3 Model B",
 131                 "bcm2837-rpi-3-b.dtb",
 132                 true,
 133         },
 134         [0x9] = {
 135                 "Zero",
 136                 "bcm2835-rpi-zero.dtb",
 137                 false,
 138         },
 139 };
 140
 141 static const struct rpi_model rpi_models_old_scheme[] = {
 142         [0x2] = {
 143                 "Model B",
 144                 "bcm2835-rpi-b.dtb",
 145                 true,
 146         },
 147         [0x3] = {
 148                 "Model B",
 149                 "bcm2835-rpi-b.dtb",
 150                 true,
 151         },
 152         [0x4] = {
 153                 "Model B rev2",
 154                 "bcm2835-rpi-b-rev2.dtb",
 155                 true,
 156         },
 157         [0x5] = {
 158                 "Model B rev2",
 159                 "bcm2835-rpi-b-rev2.dtb",
 160                 true,
 161         },
 162         [0x6] = {
 163                 "Model B rev2",
 164                 "bcm2835-rpi-b-rev2.dtb",
 165                 true,
 166         },
 167         [0x7] = {
 168                 "Model A",
 169                 "bcm2835-rpi-a.dtb",
 170                 false,
 171         },
 172         [0x8] = {
 173                 "Model A",
 174                 "bcm2835-rpi-a.dtb",
 175                 false,
 176         },
 177         [0x9] = {
 178                 "Model A",
 179                 "bcm2835-rpi-a.dtb",
 180                 false,
 181         },
 182         [0xd] = {
 183                 "Model B rev2",
 184                 "bcm2835-rpi-b-rev2.dtb",
 185                 true,
 186         },
 187         [0xe] = {
 188                 "Model B rev2",
 189                 "bcm2835-rpi-b-rev2.dtb",
 190                 true,
 191         },
 192         [0xf] = {
 193                 "Model B rev2",
 194                 "bcm2835-rpi-b-rev2.dtb",
 195                 true,
 196         },
 197         [0x10] = {
 198                 "Model B+",
 199                 "bcm2835-rpi-b-plus.dtb",
 200                 true,
 201         },
 202         [0x11] = {
 203                 "Compute Module",
 204                 "bcm2835-rpi-cm.dtb",
 205                 false,
 206         },
 207         [0x12] = {
 208                 "Model A+",
 209                 "bcm2835-rpi-a-plus.dtb",
 210                 false,
 211         },
 212         [0x13] = {
 213                 "Model B+",
 214                 "bcm2835-rpi-b-plus.dtb",
 215                 true,
 216         },
 217         [0x14] = {
 218                 "Compute Module",
 219                 "bcm2835-rpi-cm.dtb",
 220                 false,
 221         },
 222         [0x15] = {
 223                 "Model A+",
 224                 "bcm2835-rpi-a-plus.dtb",
 225                 false,
 226         },
 227 };
 228
 229 static uint32_t revision;
 230 static uint32_t rev_scheme;
 231 static uint32_t rev_type;
 232 static const struct rpi_model *model;
 233
 234 #ifdef CONFIG_ARM64
 235 static struct mm_region bcm2837_mem_map[] = {
 236         {
 237                 .base = 0x00000000UL,
 238                 .size = 0x3f000000UL,
 239                 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
 240                          PTE_BLOCK_INNER_SHARE
 241         }, {
 242                 .base = 0x3f000000UL,
 243                 .size = 0x01000000UL,
 244                 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 245                          PTE_BLOCK_NON_SHARE |
 246                          PTE_BLOCK_PXN | PTE_BLOCK_UXN
 247         }, {
 248                 /* List terminator */
 249                 0,
 250         }
 251 };
 252
 253 struct mm_region *mem_map = bcm2837_mem_map;
 254 #endif
 255
 256 int dram_init(void)
 257 {
 258         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 259         int ret;
 260
 261         BCM2835_MBOX_INIT_HDR(msg);
 262         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 263
 264         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 265         if (ret) {
 266                 printf("bcm2835: Could not query ARM memory size\n");
 267                 return -1;
 268         }
 269
 270         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 271
 272         return 0;
 273 }
 274
 275 static void set_fdtfile(void)
 276 {
 277         const char *fdtfile;
 278
 279         if (getenv("fdtfile"))
 280                 return;
 281
 282         fdtfile = model->fdtfile;
 283         setenv("fdtfile", fdtfile);
 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_fdtfile();
 358         set_usbethaddr();
 359 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 360         set_board_info();
 361 #endif
 362         set_serial_number();
 363
 364         return 0;
 365 }
 366
 367 static int power_on_module(u32 module)
 368 {
 369         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 370         int ret;
 371
 372         BCM2835_MBOX_INIT_HDR(msg_pwr);
 373         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 374                               SET_POWER_STATE);
 375         msg_pwr->set_power_state.body.req.device_id = module;
 376         msg_pwr->set_power_state.body.req.state =
 377                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 378                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 379
 380         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 381                                      &msg_pwr->hdr);
 382         if (ret) {
 383                 printf("bcm2835: Could not set module %u power state\n",
 384                        module);
 385                 return -1;
 386         }
 387
 388         return 0;
 389 }
 390
 391 static void get_board_rev(void)
 392 {
 393         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 394         int ret;
 395         const struct rpi_model *models;
 396         uint32_t models_count;
 397
 398         BCM2835_MBOX_INIT_HDR(msg);
 399         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 400
 401         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 402         if (ret) {
 403                 printf("bcm2835: Could not query board revision\n");
 404                 /* Ignore error; not critical */
 405                 return;
 406         }
 407
 408         /*
 409          * For details of old-vs-new scheme, see:
 410          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 411          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 412          * (a few posts down)
 413          *
 414          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 415          * lower byte to use as the board rev:
 416          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 417          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 418          */
 419         revision = msg->get_board_rev.body.resp.rev;
 420         if (revision & 0x800000) {
 421                 rev_scheme = 1;
 422                 rev_type = (revision >> 4) & 0xff;
 423                 models = rpi_models_new_scheme;
 424                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 425         } else {
 426                 rev_scheme = 0;
 427                 rev_type = revision & 0xff;
 428                 models = rpi_models_old_scheme;
 429                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 430         }
 431         if (rev_type >= models_count) {
 432                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 433                 model = &rpi_model_unknown;
 434         } else if (!models[rev_type].name) {
 435                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 436                 model = &rpi_model_unknown;
 437         } else {
 438                 model = &models[rev_type];
 439         }
 440
 441         printf("RPI %s (0x%x)\n", model->name, revision);
 442 }
 443
 444 int board_init(void)
 445 {
 446         get_board_rev();
 447
 448         gd->bd->bi_boot_params = 0x100;
 449
 450         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 451 }
 452
 453 int board_mmc_init(bd_t *bis)
 454 {
 455         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 456         int ret;
 457
 458         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 459
 460         BCM2835_MBOX_INIT_HDR(msg_clk);
 461         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 462         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 463
 464         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 465         if (ret) {
 466                 printf("bcm2835: Could not query eMMC clock rate\n");
 467                 return -1;
 468         }
 469
 470         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 471                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 472 }
 473
 474 int ft_board_setup(void *blob, bd_t *bd)
 475 {
 476         /*
 477          * For now, we simply always add the simplefb DT node. Later, we
 478          * should be more intelligent, and e.g. only do this if no enabled DT
 479          * node exists for the "real" graphics driver.
 480          */
 481         lcd_dt_simplefb_add_node(blob);
 482
 483         return 0;
 484 }