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