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
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 static const struct bcm2835_gpio_platdata gpio_platdata = {
  26         .base = BCM2835_GPIO_BASE,
  27 };
  28
  29 U_BOOT_DEVICE(bcm2835_gpios) = {
  30         .name = "gpio_bcm2835",
  31         .platdata = &gpio_platdata,
  32 };
  33
  34 #ifdef CONFIG_PL01X_SERIAL
  35 static const struct pl01x_serial_platdata serial_platdata = {
  36 #ifndef CONFIG_BCM2835
  37         .base = 0x3f201000,
  38 #else
  39         .base = 0x20201000,
  40 #endif
  41         .type = TYPE_PL011,
  42         .skip_init = true,
  43 };
  44
  45 U_BOOT_DEVICE(bcm2835_serials) = {
  46         .name = "serial_pl01x",
  47         .platdata = &serial_platdata,
  48 };
  49 #else
  50 static const struct bcm283x_mu_serial_platdata serial_platdata = {
  51         .base = 0x3f215040,
  52         .clock = 250000000,
  53         .skip_init = true,
  54 };
  55
  56 U_BOOT_DEVICE(bcm2837_serials) = {
  57         .name = "serial_bcm283x_mu",
  58         .platdata = &serial_platdata,
  59 };
  60 #endif
  61
  62 struct msg_get_arm_mem {
  63         struct bcm2835_mbox_hdr hdr;
  64         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  65         u32 end_tag;
  66 };
  67
  68 struct msg_get_board_rev {
  69         struct bcm2835_mbox_hdr hdr;
  70         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  71         u32 end_tag;
  72 };
  73
  74 struct msg_get_board_serial {
  75         struct bcm2835_mbox_hdr hdr;
  76         struct bcm2835_mbox_tag_get_board_serial get_board_serial;
  77         u32 end_tag;
  78 };
  79
  80 struct msg_get_mac_address {
  81         struct bcm2835_mbox_hdr hdr;
  82         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  83         u32 end_tag;
  84 };
  85
  86 struct msg_set_power_state {
  87         struct bcm2835_mbox_hdr hdr;
  88         struct bcm2835_mbox_tag_set_power_state set_power_state;
  89         u32 end_tag;
  90 };
  91
  92 struct msg_get_clock_rate {
  93         struct bcm2835_mbox_hdr hdr;
  94         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  95         u32 end_tag;
  96 };
  97
  98 /*
  99  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
 100  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
 101  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
 102  *
 103  * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
 104  * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
 105  * Foundation stated that the following source was accurate:
 106  * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
 107  */
 108 struct rpi_model {
 109         const char *name;
 110         const char *fdtfile;
 111         bool has_onboard_eth;
 112 };
 113
 114 static const struct rpi_model rpi_model_unknown = {
 115         "Unknown model",
 116         "bcm283x-rpi-other.dtb",
 117         false,
 118 };
 119
 120 static const struct rpi_model rpi_models_new_scheme[] = {
 121         [0x4] = {
 122                 "2 Model B",
 123                 "bcm2836-rpi-2-b.dtb",
 124                 true,
 125         },
 126         [0x8] = {
 127                 "3 Model B",
 128                 "bcm2837-rpi-3-b.dtb",
 129                 true,
 130         },
 131         [0x9] = {
 132                 "Zero",
 133                 "bcm2835-rpi-zero.dtb",
 134                 false,
 135         },
 136 };
 137
 138 static const struct rpi_model rpi_models_old_scheme[] = {
 139         [0x2] = {
 140                 "Model B",
 141                 "bcm2835-rpi-b.dtb",
 142                 true,
 143         },
 144         [0x3] = {
 145                 "Model B",
 146                 "bcm2835-rpi-b.dtb",
 147                 true,
 148         },
 149         [0x4] = {
 150                 "Model B rev2",
 151                 "bcm2835-rpi-b-rev2.dtb",
 152                 true,
 153         },
 154         [0x5] = {
 155                 "Model B rev2",
 156                 "bcm2835-rpi-b-rev2.dtb",
 157                 true,
 158         },
 159         [0x6] = {
 160                 "Model B rev2",
 161                 "bcm2835-rpi-b-rev2.dtb",
 162                 true,
 163         },
 164         [0x7] = {
 165                 "Model A",
 166                 "bcm2835-rpi-a.dtb",
 167                 false,
 168         },
 169         [0x8] = {
 170                 "Model A",
 171                 "bcm2835-rpi-a.dtb",
 172                 false,
 173         },
 174         [0x9] = {
 175                 "Model A",
 176                 "bcm2835-rpi-a.dtb",
 177                 false,
 178         },
 179         [0xd] = {
 180                 "Model B rev2",
 181                 "bcm2835-rpi-b-rev2.dtb",
 182                 true,
 183         },
 184         [0xe] = {
 185                 "Model B rev2",
 186                 "bcm2835-rpi-b-rev2.dtb",
 187                 true,
 188         },
 189         [0xf] = {
 190                 "Model B rev2",
 191                 "bcm2835-rpi-b-rev2.dtb",
 192                 true,
 193         },
 194         [0x10] = {
 195                 "Model B+",
 196                 "bcm2835-rpi-b-plus.dtb",
 197                 true,
 198         },
 199         [0x11] = {
 200                 "Compute Module",
 201                 "bcm2835-rpi-cm.dtb",
 202                 false,
 203         },
 204         [0x12] = {
 205                 "Model A+",
 206                 "bcm2835-rpi-a-plus.dtb",
 207                 false,
 208         },
 209         [0x13] = {
 210                 "Model B+",
 211                 "bcm2835-rpi-b-plus.dtb",
 212                 true,
 213         },
 214         [0x14] = {
 215                 "Compute Module",
 216                 "bcm2835-rpi-cm.dtb",
 217                 false,
 218         },
 219         [0x15] = {
 220                 "Model A+",
 221                 "bcm2835-rpi-a-plus.dtb",
 222                 false,
 223         },
 224 };
 225
 226 static uint32_t revision;
 227 static uint32_t rev_scheme;
 228 static uint32_t rev_type;
 229 static const struct rpi_model *model;
 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 static void set_usbethaddr(void)
 262 {
 263         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 264         int ret;
 265
 266         if (!model->has_onboard_eth)
 267                 return;
 268
 269         if (getenv("usbethaddr"))
 270                 return;
 271
 272         BCM2835_MBOX_INIT_HDR(msg);
 273         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 274
 275         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 276         if (ret) {
 277                 printf("bcm2835: Could not query MAC address\n");
 278                 /* Ignore error; not critical */
 279                 return;
 280         }
 281
 282         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 283
 284         if (!getenv("ethaddr"))
 285                 setenv("ethaddr", getenv("usbethaddr"));
 286
 287         return;
 288 }
 289
 290 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 291 static void set_board_info(void)
 292 {
 293         char s[11];
 294
 295         snprintf(s, sizeof(s), "0x%X", revision);
 296         setenv("board_revision", s);
 297         snprintf(s, sizeof(s), "%d", rev_scheme);
 298         setenv("board_rev_scheme", s);
 299         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 300         snprintf(s, sizeof(s), "0x%X", rev_type);
 301         setenv("board_rev", s);
 302         setenv("board_name", model->name);
 303 }
 304 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 305
 306 static void set_serial_number(void)
 307 {
 308         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
 309         int ret;
 310         char serial_string[17] = { 0 };
 311
 312         if (getenv("serial#"))
 313                 return;
 314
 315         BCM2835_MBOX_INIT_HDR(msg);
 316         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
 317
 318         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 319         if (ret) {
 320                 printf("bcm2835: Could not query board serial\n");
 321                 /* Ignore error; not critical */
 322                 return;
 323         }
 324
 325         snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
 326                  msg->get_board_serial.body.resp.serial);
 327         setenv("serial#", serial_string);
 328 }
 329
 330 int misc_init_r(void)
 331 {
 332         set_fdtfile();
 333         set_usbethaddr();
 334 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 335         set_board_info();
 336 #endif
 337         set_serial_number();
 338
 339         return 0;
 340 }
 341
 342 static int power_on_module(u32 module)
 343 {
 344         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 345         int ret;
 346
 347         BCM2835_MBOX_INIT_HDR(msg_pwr);
 348         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 349                               SET_POWER_STATE);
 350         msg_pwr->set_power_state.body.req.device_id = module;
 351         msg_pwr->set_power_state.body.req.state =
 352                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 353                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 354
 355         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 356                                      &msg_pwr->hdr);
 357         if (ret) {
 358                 printf("bcm2835: Could not set module %u power state\n",
 359                        module);
 360                 return -1;
 361         }
 362
 363         return 0;
 364 }
 365
 366 static void get_board_rev(void)
 367 {
 368         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 369         int ret;
 370         const struct rpi_model *models;
 371         uint32_t models_count;
 372
 373         BCM2835_MBOX_INIT_HDR(msg);
 374         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 375
 376         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 377         if (ret) {
 378                 printf("bcm2835: Could not query board revision\n");
 379                 /* Ignore error; not critical */
 380                 return;
 381         }
 382
 383         /*
 384          * For details of old-vs-new scheme, see:
 385          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 386          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 387          * (a few posts down)
 388          *
 389          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 390          * lower byte to use as the board rev:
 391          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 392          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 393          */
 394         revision = msg->get_board_rev.body.resp.rev;
 395         if (revision & 0x800000) {
 396                 rev_scheme = 1;
 397                 rev_type = (revision >> 4) & 0xff;
 398                 models = rpi_models_new_scheme;
 399                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 400         } else {
 401                 rev_scheme = 0;
 402                 rev_type = revision & 0xff;
 403                 models = rpi_models_old_scheme;
 404                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 405         }
 406         if (rev_type >= models_count) {
 407                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 408                 model = &rpi_model_unknown;
 409         } else if (!models[rev_type].name) {
 410                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 411                 model = &rpi_model_unknown;
 412         } else {
 413                 model = &models[rev_type];
 414         }
 415
 416         printf("RPI %s (0x%x)\n", model->name, revision);
 417 }
 418
 419 int board_init(void)
 420 {
 421         get_board_rev();
 422
 423         gd->bd->bi_boot_params = 0x100;
 424
 425         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 426 }
 427
 428 int board_mmc_init(bd_t *bis)
 429 {
 430         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 431         int ret;
 432
 433         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 434
 435         BCM2835_MBOX_INIT_HDR(msg_clk);
 436         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 437         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 438
 439         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 440         if (ret) {
 441                 printf("bcm2835: Could not query eMMC clock rate\n");
 442                 return -1;
 443         }
 444
 445         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 446                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 447 }
 448
 449 int ft_board_setup(void *blob, bd_t *bd)
 450 {
 451         /*
 452          * For now, we simply always add the simplefb DT node. Later, we
 453          * should be more intelligent, and e.g. only do this if no enabled DT
 454          * node exists for the "real" graphics driver.
 455          */
 456         lcd_dt_simplefb_add_node(blob);
 457
 458         return 0;
 459 }