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

   1 /*
   2  * (C) Copyright 2012-2013,2015 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
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 static const struct bcm2835_gpio_platdata gpio_platdata = {
  25         .base = BCM2835_GPIO_BASE,
  26 };
  27
  28 U_BOOT_DEVICE(bcm2835_gpios) = {
  29         .name = "gpio_bcm2835",
  30         .platdata = &gpio_platdata,
  31 };
  32
  33 static const struct pl01x_serial_platdata serial_platdata = {
  34 #ifndef CONFIG_BCM2835
  35         .base = 0x3f201000,
  36 #else
  37         .base = 0x20201000,
  38 #endif
  39         .type = TYPE_PL011,
  40         .skip_init = true,
  41 };
  42
  43 U_BOOT_DEVICE(bcm2835_serials) = {
  44         .name = "serial_pl01x",
  45         .platdata = &serial_platdata,
  46 };
  47
  48 struct msg_get_arm_mem {
  49         struct bcm2835_mbox_hdr hdr;
  50         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  51         u32 end_tag;
  52 };
  53
  54 struct msg_get_board_rev {
  55         struct bcm2835_mbox_hdr hdr;
  56         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  57         u32 end_tag;
  58 };
  59
  60 struct msg_get_board_serial {
  61         struct bcm2835_mbox_hdr hdr;
  62         struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  63         u32 end_tag;
  64 };
  65
  66 struct msg_get_mac_address {
  67         struct bcm2835_mbox_hdr hdr;
  68         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  69         u32 end_tag;
  70 };
  71
  72 struct msg_set_power_state {
  73         struct bcm2835_mbox_hdr hdr;
  74         struct bcm2835_mbox_tag_set_power_state set_power_state;
  75         u32 end_tag;
  76 };
  77
  78 struct msg_get_clock_rate {
  79         struct bcm2835_mbox_hdr hdr;
  80         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  81         u32 end_tag;
  82 };
  83
  84 /*
  85  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
  86  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
  87  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
  88  *
  89  * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
  90  * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
  91  * Foundation stated that the following source was accurate:
  92  * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
  93  */
  94 struct rpi_model {
  95         const char *name;
  96         const char *fdtfile;
  97         bool has_onboard_eth;
  98 };
  99
 100 static const struct rpi_model rpi_model_unknown = {
 101         "Unknown model",
 102         "bcm283x-rpi-other.dtb",
 103         false,
 104 };
 105
 106 static const struct rpi_model rpi_models_new_scheme[] = {
 107         [0x4] = {
 108                 "2 Model B",
 109                 "bcm2836-rpi-2-b.dtb",
 110                 true,
 111         },
 112         [0x8] = {
 113                 "3 Model B",
 114                 "bcm2837-rpi-3-b.dtb",
 115                 true,
 116         },
 117         [0x9] = {
 118                 "Zero",
 119                 "bcm2835-rpi-zero.dtb",
 120                 false,
 121         },
 122 };
 123
 124 static const struct rpi_model rpi_models_old_scheme[] = {
 125         [0x2] = {
 126                 "Model B",
 127                 "bcm2835-rpi-b.dtb",
 128                 true,
 129         },
 130         [0x3] = {
 131                 "Model B",
 132                 "bcm2835-rpi-b.dtb",
 133                 true,
 134         },
 135         [0x4] = {
 136                 "Model B rev2",
 137                 "bcm2835-rpi-b-rev2.dtb",
 138                 true,
 139         },
 140         [0x5] = {
 141                 "Model B rev2",
 142                 "bcm2835-rpi-b-rev2.dtb",
 143                 true,
 144         },
 145         [0x6] = {
 146                 "Model B rev2",
 147                 "bcm2835-rpi-b-rev2.dtb",
 148                 true,
 149         },
 150         [0x7] = {
 151                 "Model A",
 152                 "bcm2835-rpi-a.dtb",
 153                 false,
 154         },
 155         [0x8] = {
 156                 "Model A",
 157                 "bcm2835-rpi-a.dtb",
 158                 false,
 159         },
 160         [0x9] = {
 161                 "Model A",
 162                 "bcm2835-rpi-a.dtb",
 163                 false,
 164         },
 165         [0xd] = {
 166                 "Model B rev2",
 167                 "bcm2835-rpi-b-rev2.dtb",
 168                 true,
 169         },
 170         [0xe] = {
 171                 "Model B rev2",
 172                 "bcm2835-rpi-b-rev2.dtb",
 173                 true,
 174         },
 175         [0xf] = {
 176                 "Model B rev2",
 177                 "bcm2835-rpi-b-rev2.dtb",
 178                 true,
 179         },
 180         [0x10] = {
 181                 "Model B+",
 182                 "bcm2835-rpi-b-plus.dtb",
 183                 true,
 184         },
 185         [0x11] = {
 186                 "Compute Module",
 187                 "bcm2835-rpi-cm.dtb",
 188                 false,
 189         },
 190         [0x12] = {
 191                 "Model A+",
 192                 "bcm2835-rpi-a-plus.dtb",
 193                 false,
 194         },
 195         [0x13] = {
 196                 "Model B+",
 197                 "bcm2835-rpi-b-plus.dtb",
 198                 true,
 199         },
 200         [0x14] = {
 201                 "Compute Module",
 202                 "bcm2835-rpi-cm.dtb",
 203                 false,
 204         },
 205         [0x15] = {
 206                 "Model A+",
 207                 "bcm2835-rpi-a-plus.dtb",
 208                 false,
 209         },
 210 };
 211
 212 static uint32_t revision;
 213 static uint32_t rev_scheme;
 214 static uint32_t rev_type;
 215 static const struct rpi_model *model;
 216
 217 int dram_init(void)
 218 {
 219         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 220         int ret;
 221
 222         BCM2835_MBOX_INIT_HDR(msg);
 223         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 224
 225         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 226         if (ret) {
 227                 printf("bcm2835: Could not query ARM memory size\n");
 228                 return -1;
 229         }
 230
 231         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 232
 233         return 0;
 234 }
 235
 236 static void set_fdtfile(void)
 237 {
 238         const char *fdtfile;
 239
 240         if (getenv("fdtfile"))
 241                 return;
 242
 243         fdtfile = model->fdtfile;
 244         setenv("fdtfile", fdtfile);
 245 }
 246
 247 static void set_usbethaddr(void)
 248 {
 249         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 250         int ret;
 251
 252         if (!model->has_onboard_eth)
 253                 return;
 254
 255         if (getenv("usbethaddr"))
 256                 return;
 257
 258         BCM2835_MBOX_INIT_HDR(msg);
 259         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 260
 261         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 262         if (ret) {
 263                 printf("bcm2835: Could not query MAC address\n");
 264                 /* Ignore error; not critical */
 265                 return;
 266         }
 267
 268         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 269
 270         if (!getenv("ethaddr"))
 271                 setenv("ethaddr", getenv("usbethaddr"));
 272
 273         return;
 274 }
 275
 276 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 277 static void set_board_info(void)
 278 {
 279         char s[11];
 280
 281         snprintf(s, sizeof(s), "0x%X", revision);
 282         setenv("board_revision", s);
 283         snprintf(s, sizeof(s), "%d", rev_scheme);
 284         setenv("board_rev_scheme", s);
 285         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 286         snprintf(s, sizeof(s), "0x%X", rev_type);
 287         setenv("board_rev", s);
 288         setenv("board_name", model->name);
 289 }
 290 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 291
 292 static void set_serial_number(void)
 293 {
 294         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 295         int ret;
 296         char serial_string[17] = { 0 };
 297
 298         if (getenv("serial#"))
 299                 return;
 300
 301         BCM2835_MBOX_INIT_HDR(msg);
 302         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 303
 304         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 305         if (ret) {
 306                 printf("bcm2835: Could not query board serial\n");
 307                 /* Ignore error; not critical */
 308                 return;
 309         }
 310
 311         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 312                  msg->get_board_serial.body.resp.serial);
 313         setenv("serial#", serial_string);
 314 }
 315
 316 int misc_init_r(void)
 317 {
 318         set_fdtfile();
 319         set_usbethaddr();
 320 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 321         set_board_info();
 322 #endif
 323         set_serial_number();
 324
 325         return 0;
 326 }
 327
 328 static int power_on_module(u32 module)
 329 {
 330         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 331         int ret;
 332
 333         BCM2835_MBOX_INIT_HDR(msg_pwr);
 334         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 335                               SET_POWER_STATE);
 336         msg_pwr->set_power_state.body.req.device_id = module;
 337         msg_pwr->set_power_state.body.req.state =
 338                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 339                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 340
 341         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 342                                      &msg_pwr->hdr);
 343         if (ret) {
 344                 printf("bcm2835: Could not set module %u power state\n",
 345                        module);
 346                 return -1;
 347         }
 348
 349         return 0;
 350 }
 351
 352 static void get_board_rev(void)
 353 {
 354         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 355         int ret;
 356         const struct rpi_model *models;
 357         uint32_t models_count;
 358
 359         BCM2835_MBOX_INIT_HDR(msg);
 360         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 361
 362         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 363         if (ret) {
 364                 printf("bcm2835: Could not query board revision\n");
 365                 /* Ignore error; not critical */
 366                 return;
 367         }
 368
 369         /*
 370          * For details of old-vs-new scheme, see:
 371          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 372          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 373          * (a few posts down)
 374          *
 375          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 376          * lower byte to use as the board rev:
 377          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 378          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 379          */
 380         revision = msg->get_board_rev.body.resp.rev;
 381         if (revision & 0x800000) {
 382                 rev_scheme = 1;
 383                 rev_type = (revision >> 4) & 0xff;
 384                 models = rpi_models_new_scheme;
 385                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 386         } else {
 387                 rev_scheme = 0;
 388                 rev_type = revision & 0xff;
 389                 models = rpi_models_old_scheme;
 390                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 391         }
 392         if (rev_type >= models_count) {
 393                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 394                 model = &rpi_model_unknown;
 395         } else if (!models[rev_type].name) {
 396                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 397                 model = &rpi_model_unknown;
 398         } else {
 399                 model = &models[rev_type];
 400         }
 401
 402         printf("RPI %s (0x%x)\n", model->name, revision);
 403 }
 404
 405 int board_init(void)
 406 {
 407         get_board_rev();
 408
 409         gd->bd->bi_boot_params = 0x100;
 410
 411         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 412 }
 413
 414 int board_mmc_init(bd_t *bis)
 415 {
 416         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 417         int ret;
 418
 419         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 420
 421         BCM2835_MBOX_INIT_HDR(msg_clk);
 422         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 423         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 424
 425         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 426         if (ret) {
 427                 printf("bcm2835: Could not query eMMC clock rate\n");
 428                 return -1;
 429         }
 430
 431         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 432                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 433 }
 434
 435 int ft_board_setup(void *blob, bd_t *bd)
 436 {
 437         /*
 438          * For now, we simply always add the simplefb DT node. Later, we
 439          * should be more intelligent, and e.g. only do this if no enabled DT
 440          * node exists for the "real" graphics driver.
 441          */
 442         lcd_dt_simplefb_add_node(blob);
 443
 444         return 0;
 445 }