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 #ifdef CONFIG_BCM2836
 103         "bcm2836-rpi-other.dtb",
 104 #else
 105         "bcm2835-rpi-other.dtb",
 106 #endif
 107         false,
 108 };
 109
 110 static const struct rpi_model rpi_models_new_scheme[] = {
 111         [0x4] = {
 112                 "2 Model B",
 113                 "bcm2836-rpi-2-b.dtb",
 114                 true,
 115         },
 116         [0x9] = {
 117                 "Zero",
 118                 "bcm2835-rpi-zero.dtb",
 119                 false,
 120         },
 121 };
 122
 123 static const struct rpi_model rpi_models_old_scheme[] = {
 124         [0x2] = {
 125                 "Model B",
 126                 "bcm2835-rpi-b.dtb",
 127                 true,
 128         },
 129         [0x3] = {
 130                 "Model B",
 131                 "bcm2835-rpi-b.dtb",
 132                 true,
 133         },
 134         [0x4] = {
 135                 "Model B rev2",
 136                 "bcm2835-rpi-b-rev2.dtb",
 137                 true,
 138         },
 139         [0x5] = {
 140                 "Model B rev2",
 141                 "bcm2835-rpi-b-rev2.dtb",
 142                 true,
 143         },
 144         [0x6] = {
 145                 "Model B rev2",
 146                 "bcm2835-rpi-b-rev2.dtb",
 147                 true,
 148         },
 149         [0x7] = {
 150                 "Model A",
 151                 "bcm2835-rpi-a.dtb",
 152                 false,
 153         },
 154         [0x8] = {
 155                 "Model A",
 156                 "bcm2835-rpi-a.dtb",
 157                 false,
 158         },
 159         [0x9] = {
 160                 "Model A",
 161                 "bcm2835-rpi-a.dtb",
 162                 false,
 163         },
 164         [0xd] = {
 165                 "Model B rev2",
 166                 "bcm2835-rpi-b-rev2.dtb",
 167                 true,
 168         },
 169         [0xe] = {
 170                 "Model B rev2",
 171                 "bcm2835-rpi-b-rev2.dtb",
 172                 true,
 173         },
 174         [0xf] = {
 175                 "Model B rev2",
 176                 "bcm2835-rpi-b-rev2.dtb",
 177                 true,
 178         },
 179         [0x10] = {
 180                 "Model B+",
 181                 "bcm2835-rpi-b-plus.dtb",
 182                 true,
 183         },
 184         [0x11] = {
 185                 "Compute Module",
 186                 "bcm2835-rpi-cm.dtb",
 187                 false,
 188         },
 189         [0x12] = {
 190                 "Model A+",
 191                 "bcm2835-rpi-a-plus.dtb",
 192                 false,
 193         },
 194         [0x13] = {
 195                 "Model B+",
 196                 "bcm2835-rpi-b-plus.dtb",
 197                 true,
 198         },
 199         [0x14] = {
 200                 "Compute Module",
 201                 "bcm2835-rpi-cm.dtb",
 202                 false,
 203         },
 204         [0x15] = {
 205                 "Model A+",
 206                 "bcm2835-rpi-a-plus.dtb",
 207                 false,
 208         },
 209 };
 210
 211 static uint32_t revision;
 212 static uint32_t rev_scheme;
 213 static uint32_t rev_type;
 214 static const struct rpi_model *model;
 215
 216 int dram_init(void)
 217 {
 218         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 219         int ret;
 220
 221         BCM2835_MBOX_INIT_HDR(msg);
 222         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 223
 224         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 225         if (ret) {
 226                 printf("bcm2835: Could not query ARM memory size\n");
 227                 return -1;
 228         }
 229
 230         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 231
 232         return 0;
 233 }
 234
 235 static void set_fdtfile(void)
 236 {
 237         const char *fdtfile;
 238
 239         if (getenv("fdtfile"))
 240                 return;
 241
 242         fdtfile = model->fdtfile;
 243         setenv("fdtfile", fdtfile);
 244 }
 245
 246 static void set_usbethaddr(void)
 247 {
 248         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 249         int ret;
 250
 251         if (!model->has_onboard_eth)
 252                 return;
 253
 254         if (getenv("usbethaddr"))
 255                 return;
 256
 257         BCM2835_MBOX_INIT_HDR(msg);
 258         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 259
 260         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 261         if (ret) {
 262                 printf("bcm2835: Could not query MAC address\n");
 263                 /* Ignore error; not critical */
 264                 return;
 265         }
 266
 267         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 268
 269         if (!getenv("ethaddr"))
 270                 setenv("ethaddr", getenv("usbethaddr"));
 271
 272         return;
 273 }
 274
 275 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 276 static void set_board_info(void)
 277 {
 278         char s[11];
 279
 280         snprintf(s, sizeof(s), "0x%X", revision);
 281         setenv("board_revision", s);
 282         snprintf(s, sizeof(s), "%d", rev_scheme);
 283         setenv("board_rev_scheme", s);
 284         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 285         snprintf(s, sizeof(s), "0x%X", rev_type);
 286         setenv("board_rev", s);
 287         setenv("board_name", model->name);
 288 }
 289 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 290
 291 static void set_serial_number(void)
 292 {
 293         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 294         int ret;
 295         char serial_string[17] = { 0 };
 296
 297         if (getenv("serial#"))
 298                 return;
 299
 300         BCM2835_MBOX_INIT_HDR(msg);
 301         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 302
 303         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 304         if (ret) {
 305                 printf("bcm2835: Could not query board serial\n");
 306                 /* Ignore error; not critical */
 307                 return;
 308         }
 309
 310         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 311                  msg->get_board_serial.body.resp.serial);
 312         setenv("serial#", serial_string);
 313 }
 314
 315 int misc_init_r(void)
 316 {
 317         set_fdtfile();
 318         set_usbethaddr();
 319 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 320         set_board_info();
 321 #endif
 322         set_serial_number();
 323
 324         return 0;
 325 }
 326
 327 static int power_on_module(u32 module)
 328 {
 329         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 330         int ret;
 331
 332         BCM2835_MBOX_INIT_HDR(msg_pwr);
 333         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 334                               SET_POWER_STATE);
 335         msg_pwr->set_power_state.body.req.device_id = module;
 336         msg_pwr->set_power_state.body.req.state =
 337                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 338                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 339
 340         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 341                                      &msg_pwr->hdr);
 342         if (ret) {
 343                 printf("bcm2835: Could not set module %u power state\n",
 344                        module);
 345                 return -1;
 346         }
 347
 348         return 0;
 349 }
 350
 351 static void get_board_rev(void)
 352 {
 353         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 354         int ret;
 355         const struct rpi_model *models;
 356         uint32_t models_count;
 357
 358         BCM2835_MBOX_INIT_HDR(msg);
 359         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 360
 361         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 362         if (ret) {
 363                 printf("bcm2835: Could not query board revision\n");
 364                 /* Ignore error; not critical */
 365                 return;
 366         }
 367
 368         /*
 369          * For details of old-vs-new scheme, see:
 370          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 371          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 372          * (a few posts down)
 373          *
 374          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 375          * lower byte to use as the board rev:
 376          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 377          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 378          */
 379         revision = msg->get_board_rev.body.resp.rev;
 380         if (revision & 0x800000) {
 381                 rev_scheme = 1;
 382                 rev_type = (revision >> 4) & 0xff;
 383                 models = rpi_models_new_scheme;
 384                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 385         } else {
 386                 rev_scheme = 0;
 387                 rev_type = revision & 0xff;
 388                 models = rpi_models_old_scheme;
 389                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 390         }
 391         if (rev_type >= models_count) {
 392                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 393                 model = &rpi_model_unknown;
 394         } else if (!models[rev_type].name) {
 395                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 396                 model = &rpi_model_unknown;
 397         } else {
 398                 model = &models[rev_type];
 399         }
 400
 401         printf("RPI %s (0x%x)\n", model->name, revision);
 402 }
 403
 404 int board_init(void)
 405 {
 406         get_board_rev();
 407
 408         gd->bd->bi_boot_params = 0x100;
 409
 410         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 411 }
 412
 413 int board_mmc_init(bd_t *bis)
 414 {
 415         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 416         int ret;
 417
 418         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 419
 420         BCM2835_MBOX_INIT_HDR(msg_clk);
 421         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 422         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 423
 424         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 425         if (ret) {
 426                 printf("bcm2835: Could not query eMMC clock rate\n");
 427                 return -1;
 428         }
 429
 430         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 431                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 432 }
 433
 434 int ft_board_setup(void *blob, bd_t *bd)
 435 {
 436         /*
 437          * For now, we simply always add the simplefb DT node. Later, we
 438          * should be more intelligent, and e.g. only do this if no enabled DT
 439          * node exists for the "real" graphics driver.
 440          */
 441         lcd_dt_simplefb_add_node(blob);
 442
 443         return 0;
 444 }