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 <config.h>
   9 #include <dm.h>
  10 #include <fdt_support.h>
  11 #include <fdt_simplefb.h>
  12 #include <lcd.h>
  13 #include <memalign.h>
  14 #include <mmc.h>
  15 #include <asm/gpio.h>
  16 #include <asm/arch/mbox.h>
  17 #include <asm/arch/sdhci.h>
  18 #include <asm/global_data.h>
  19 #include <dm/platform_data/serial_pl01x.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 static const struct bcm2835_gpio_platdata gpio_platdata = {
  24         .base = BCM2835_GPIO_BASE,
  25 };
  26
  27 U_BOOT_DEVICE(bcm2835_gpios) = {
  28         .name = "gpio_bcm2835",
  29         .platdata = &gpio_platdata,
  30 };
  31
  32 static const struct pl01x_serial_platdata serial_platdata = {
  33 #ifdef CONFIG_BCM2836
  34         .base = 0x3f201000,
  35 #else
  36         .base = 0x20201000,
  37 #endif
  38         .type = TYPE_PL011,
  39         .clock = 3000000,
  40 };
  41
  42 U_BOOT_DEVICE(bcm2835_serials) = {
  43         .name = "serial_pl01x",
  44         .platdata = &serial_platdata,
  45 };
  46
  47 struct msg_get_arm_mem {
  48         struct bcm2835_mbox_hdr hdr;
  49         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  50         u32 end_tag;
  51 };
  52
  53 struct msg_get_board_rev {
  54         struct bcm2835_mbox_hdr hdr;
  55         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  56         u32 end_tag;
  57 };
  58
  59 struct msg_get_mac_address {
  60         struct bcm2835_mbox_hdr hdr;
  61         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  62         u32 end_tag;
  63 };
  64
  65 struct msg_set_power_state {
  66         struct bcm2835_mbox_hdr hdr;
  67         struct bcm2835_mbox_tag_set_power_state set_power_state;
  68         u32 end_tag;
  69 };
  70
  71 struct msg_get_clock_rate {
  72         struct bcm2835_mbox_hdr hdr;
  73         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  74         u32 end_tag;
  75 };
  76
  77 /*
  78  * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
  79  * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
  80  * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
  81  */
  82 struct rpi_model {
  83         const char *name;
  84         const char *fdtfile;
  85         bool has_onboard_eth;
  86 };
  87
  88 static const struct rpi_model rpi_model_unknown = {
  89         "Unknown model",
  90 #ifdef CONFIG_BCM2836
  91         "bcm2836-rpi-other.dtb",
  92 #else
  93         "bcm2835-rpi-other.dtb",
  94 #endif
  95         false,
  96 };
  97
  98 static const struct rpi_model rpi_models_new_scheme[] = {
  99         [0x4] = {
 100                 "2 Model B",
 101                 "bcm2836-rpi-2-b.dtb",
 102                 true,
 103         },
 104 };
 105
 106 static const struct rpi_model rpi_models_old_scheme[] = {
 107         [0x2] = {
 108                 "Model B (no P5)",
 109                 "bcm2835-rpi-b-i2c0.dtb",
 110                 true,
 111         },
 112         [0x3] = {
 113                 "Model B (no P5)",
 114                 "bcm2835-rpi-b-i2c0.dtb",
 115                 true,
 116         },
 117         [0x4] = {
 118                 "Model B",
 119                 "bcm2835-rpi-b.dtb",
 120                 true,
 121         },
 122         [0x5] = {
 123                 "Model B",
 124                 "bcm2835-rpi-b.dtb",
 125                 true,
 126         },
 127         [0x6] = {
 128                 "Model B",
 129                 "bcm2835-rpi-b.dtb",
 130                 true,
 131         },
 132         [0x7] = {
 133                 "Model A",
 134                 "bcm2835-rpi-a.dtb",
 135                 false,
 136         },
 137         [0x8] = {
 138                 "Model A",
 139                 "bcm2835-rpi-a.dtb",
 140                 false,
 141         },
 142         [0x9] = {
 143                 "Model A",
 144                 "bcm2835-rpi-a.dtb",
 145                 false,
 146         },
 147         [0xd] = {
 148                 "Model B rev2",
 149                 "bcm2835-rpi-b-rev2.dtb",
 150                 true,
 151         },
 152         [0xe] = {
 153                 "Model B rev2",
 154                 "bcm2835-rpi-b-rev2.dtb",
 155                 true,
 156         },
 157         [0xf] = {
 158                 "Model B rev2",
 159                 "bcm2835-rpi-b-rev2.dtb",
 160                 true,
 161         },
 162         [0x10] = {
 163                 "Model B+",
 164                 "bcm2835-rpi-b-plus.dtb",
 165                 true,
 166         },
 167         [0x11] = {
 168                 "Compute Module",
 169                 "bcm2835-rpi-cm.dtb",
 170                 false,
 171         },
 172         [0x12] = {
 173                 "Model A+",
 174                 "bcm2835-rpi-a-plus.dtb",
 175                 false,
 176         },
 177         [0x13] = {
 178                 "Model B+",
 179                 "bcm2835-rpi-b-plus.dtb",
 180                 true,
 181         },
 182         [0x14] = {
 183                 "Compute Module",
 184                 "bcm2835-rpi-cm.dtb",
 185                 false,
 186         },
 187         [0x15] = {
 188                 "Model A+",
 189                 "bcm2835-rpi-a-plus.dtb",
 190                 false,
 191         },
 192 };
 193
 194 static uint32_t revision;
 195 static uint32_t rev_scheme;
 196 static uint32_t rev_type;
 197 static const struct rpi_model *model;
 198
 199 int dram_init(void)
 200 {
 201         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 202         int ret;
 203
 204         BCM2835_MBOX_INIT_HDR(msg);
 205         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 206
 207         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 208         if (ret) {
 209                 printf("bcm2835: Could not query ARM memory size\n");
 210                 return -1;
 211         }
 212
 213         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 214
 215         return 0;
 216 }
 217
 218 static void set_fdtfile(void)
 219 {
 220         const char *fdtfile;
 221
 222         if (getenv("fdtfile"))
 223                 return;
 224
 225         fdtfile = model->fdtfile;
 226         setenv("fdtfile", fdtfile);
 227 }
 228
 229 static void set_usbethaddr(void)
 230 {
 231         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 232         int ret;
 233
 234         if (!model->has_onboard_eth)
 235                 return;
 236
 237         if (getenv("usbethaddr"))
 238                 return;
 239
 240         BCM2835_MBOX_INIT_HDR(msg);
 241         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 242
 243         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 244         if (ret) {
 245                 printf("bcm2835: Could not query MAC address\n");
 246                 /* Ignore error; not critical */
 247                 return;
 248         }
 249
 250         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 251
 252         return;
 253 }
 254
 255 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 256 static void set_board_info(void)
 257 {
 258         char s[11];
 259
 260         snprintf(s, sizeof(s), "0x%X", revision);
 261         setenv("board_revision", s);
 262         snprintf(s, sizeof(s), "%d", rev_scheme);
 263         setenv("board_rev_scheme", s);
 264         /* Can't rename this to board_rev_type since it's an ABI for scripts */
 265         snprintf(s, sizeof(s), "0x%X", rev_type);
 266         setenv("board_rev", s);
 267         setenv("board_name", model->name);
 268 }
 269 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
 270
 271 int misc_init_r(void)
 272 {
 273         set_fdtfile();
 274         set_usbethaddr();
 275 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 276         set_board_info();
 277 #endif
 278         return 0;
 279 }
 280
 281 static int power_on_module(u32 module)
 282 {
 283         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 284         int ret;
 285
 286         BCM2835_MBOX_INIT_HDR(msg_pwr);
 287         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 288                               SET_POWER_STATE);
 289         msg_pwr->set_power_state.body.req.device_id = module;
 290         msg_pwr->set_power_state.body.req.state =
 291                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 292                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 293
 294         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 295                                      &msg_pwr->hdr);
 296         if (ret) {
 297                 printf("bcm2835: Could not set module %u power state\n",
 298                        module);
 299                 return -1;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static void get_board_rev(void)
 306 {
 307         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 308         int ret;
 309         const struct rpi_model *models;
 310         uint32_t models_count;
 311
 312         BCM2835_MBOX_INIT_HDR(msg);
 313         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 314
 315         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 316         if (ret) {
 317                 printf("bcm2835: Could not query board revision\n");
 318                 /* Ignore error; not critical */
 319                 return;
 320         }
 321
 322         /*
 323          * For details of old-vs-new scheme, see:
 324          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 325          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 326          * (a few posts down)
 327          *
 328          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 329          * lower byte to use as the board rev:
 330          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 331          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 332          */
 333         revision = msg->get_board_rev.body.resp.rev;
 334         if (revision & 0x800000) {
 335                 rev_scheme = 1;
 336                 rev_type = (revision >> 4) & 0xff;
 337                 models = rpi_models_new_scheme;
 338                 models_count = ARRAY_SIZE(rpi_models_new_scheme);
 339         } else {
 340                 rev_scheme = 0;
 341                 rev_type = revision & 0xff;
 342                 models = rpi_models_old_scheme;
 343                 models_count = ARRAY_SIZE(rpi_models_old_scheme);
 344         }
 345         if (rev_type >= models_count) {
 346                 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
 347                 model = &rpi_model_unknown;
 348         } else if (!models[rev_type].name) {
 349                 printf("RPI: Board rev 0x%x unknown\n", rev_type);
 350                 model = &rpi_model_unknown;
 351         } else {
 352                 model = &models[rev_type];
 353         }
 354
 355         printf("RPI %s (0x%x)\n", model->name, revision);
 356 }
 357
 358 int board_init(void)
 359 {
 360         get_board_rev();
 361
 362         gd->bd->bi_boot_params = 0x100;
 363
 364         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 365 }
 366
 367 int board_mmc_init(bd_t *bis)
 368 {
 369         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 370         int ret;
 371
 372         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 373
 374         BCM2835_MBOX_INIT_HDR(msg_clk);
 375         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 376         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 377
 378         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 379         if (ret) {
 380                 printf("bcm2835: Could not query eMMC clock rate\n");
 381                 return -1;
 382         }
 383
 384         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 385                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 386 }
 387
 388 int ft_board_setup(void *blob, bd_t *bd)
 389 {
 390         /*
 391          * For now, we simply always add the simplefb DT node. Later, we
 392          * should be more intelligent, and e.g. only do this if no enabled DT
 393          * node exists for the "real" graphics driver.
 394          */
 395         lcd_dt_simplefb_add_node(blob);
 396
 397         return 0;
 398 }