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 /* See comments in mbox.h for data source */
  78 static const struct {
  79         const char *name;
  80         const char *fdtfile;
  81         bool has_onboard_eth;
  82 } models[] = {
  83         [0] = {
  84                 "Unknown model",
  85 #ifdef CONFIG_BCM2836
  86                 "bcm2836-rpi-other.dtb",
  87 #else
  88                 "bcm2835-rpi-other.dtb",
  89 #endif
  90                 false,
  91         },
  92 #ifdef CONFIG_BCM2836
  93         [BCM2836_BOARD_REV_2_B] = {
  94                 "2 Model B",
  95                 "bcm2836-rpi-2-b.dtb",
  96                 true,
  97         },
  98 #else
  99         [BCM2835_BOARD_REV_B_I2C0_2] = {
 100                 "Model B (no P5)",
 101                 "bcm2835-rpi-b-i2c0.dtb",
 102                 true,
 103         },
 104         [BCM2835_BOARD_REV_B_I2C0_3] = {
 105                 "Model B (no P5)",
 106                 "bcm2835-rpi-b-i2c0.dtb",
 107                 true,
 108         },
 109         [BCM2835_BOARD_REV_B_I2C1_4] = {
 110                 "Model B",
 111                 "bcm2835-rpi-b.dtb",
 112                 true,
 113         },
 114         [BCM2835_BOARD_REV_B_I2C1_5] = {
 115                 "Model B",
 116                 "bcm2835-rpi-b.dtb",
 117                 true,
 118         },
 119         [BCM2835_BOARD_REV_B_I2C1_6] = {
 120                 "Model B",
 121                 "bcm2835-rpi-b.dtb",
 122                 true,
 123         },
 124         [BCM2835_BOARD_REV_A_7] = {
 125                 "Model A",
 126                 "bcm2835-rpi-a.dtb",
 127                 false,
 128         },
 129         [BCM2835_BOARD_REV_A_8] = {
 130                 "Model A",
 131                 "bcm2835-rpi-a.dtb",
 132                 false,
 133         },
 134         [BCM2835_BOARD_REV_A_9] = {
 135                 "Model A",
 136                 "bcm2835-rpi-a.dtb",
 137                 false,
 138         },
 139         [BCM2835_BOARD_REV_B_REV2_d] = {
 140                 "Model B rev2",
 141                 "bcm2835-rpi-b-rev2.dtb",
 142                 true,
 143         },
 144         [BCM2835_BOARD_REV_B_REV2_e] = {
 145                 "Model B rev2",
 146                 "bcm2835-rpi-b-rev2.dtb",
 147                 true,
 148         },
 149         [BCM2835_BOARD_REV_B_REV2_f] = {
 150                 "Model B rev2",
 151                 "bcm2835-rpi-b-rev2.dtb",
 152                 true,
 153         },
 154         [BCM2835_BOARD_REV_B_PLUS] = {
 155                 "Model B+",
 156                 "bcm2835-rpi-b-plus.dtb",
 157                 true,
 158         },
 159         [BCM2835_BOARD_REV_CM] = {
 160                 "Compute Module",
 161                 "bcm2835-rpi-cm.dtb",
 162                 false,
 163         },
 164         [BCM2835_BOARD_REV_A_PLUS] = {
 165                 "Model A+",
 166                 "bcm2835-rpi-a-plus.dtb",
 167                 false,
 168         },
 169         [BCM2835_BOARD_REV_B_PLUS_13] = {
 170                 "Model B+",
 171                 "bcm2835-rpi-b-plus.dtb",
 172                 true,
 173         },
 174         [BCM2835_BOARD_REV_CM_14] = {
 175                 "Compute Module",
 176                 "bcm2835-rpi-cm.dtb",
 177                 false,
 178         },
 179 #endif
 180 };
 181
 182 u32 rpi_board_rev = 0;
 183
 184 int dram_init(void)
 185 {
 186         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 187         int ret;
 188
 189         BCM2835_MBOX_INIT_HDR(msg);
 190         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 191
 192         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 193         if (ret) {
 194                 printf("bcm2835: Could not query ARM memory size\n");
 195                 return -1;
 196         }
 197
 198         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 199
 200         return 0;
 201 }
 202
 203 static void set_fdtfile(void)
 204 {
 205         const char *fdtfile;
 206
 207         if (getenv("fdtfile"))
 208                 return;
 209
 210         fdtfile = models[rpi_board_rev].fdtfile;
 211         setenv("fdtfile", fdtfile);
 212 }
 213
 214 static void set_usbethaddr(void)
 215 {
 216         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 217         int ret;
 218
 219         if (!models[rpi_board_rev].has_onboard_eth)
 220                 return;
 221
 222         if (getenv("usbethaddr"))
 223                 return;
 224
 225         BCM2835_MBOX_INIT_HDR(msg);
 226         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 227
 228         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 229         if (ret) {
 230                 printf("bcm2835: Could not query MAC address\n");
 231                 /* Ignore error; not critical */
 232                 return;
 233         }
 234
 235         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 236
 237         return;
 238 }
 239
 240 int misc_init_r(void)
 241 {
 242         set_fdtfile();
 243         set_usbethaddr();
 244         return 0;
 245 }
 246
 247 static int power_on_module(u32 module)
 248 {
 249         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 250         int ret;
 251
 252         BCM2835_MBOX_INIT_HDR(msg_pwr);
 253         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 254                               SET_POWER_STATE);
 255         msg_pwr->set_power_state.body.req.device_id = module;
 256         msg_pwr->set_power_state.body.req.state =
 257                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 258                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 259
 260         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 261                                      &msg_pwr->hdr);
 262         if (ret) {
 263                 printf("bcm2835: Could not set module %u power state\n",
 264                        module);
 265                 return -1;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static void get_board_rev(void)
 272 {
 273         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 274         int ret;
 275         const char *name;
 276
 277         BCM2835_MBOX_INIT_HDR(msg);
 278         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 279
 280         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 281         if (ret) {
 282                 printf("bcm2835: Could not query board revision\n");
 283                 /* Ignore error; not critical */
 284                 return;
 285         }
 286
 287         /*
 288          * For details of old-vs-new scheme, see:
 289          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 290          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 291          * (a few posts down)
 292          *
 293          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 294          * lower byte to use as the board rev:
 295          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 296          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 297          */
 298         rpi_board_rev = msg->get_board_rev.body.resp.rev;
 299         if (rpi_board_rev & 0x800000)
 300                 rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
 301         else
 302                 rpi_board_rev &= 0xff;
 303         if (rpi_board_rev >= ARRAY_SIZE(models)) {
 304                 printf("RPI: Board rev %u outside known range\n",
 305                        rpi_board_rev);
 306                 rpi_board_rev = 0;
 307         }
 308         if (!models[rpi_board_rev].name) {
 309                 printf("RPI: Board rev %u unknown\n", rpi_board_rev);
 310                 rpi_board_rev = 0;
 311         }
 312
 313         name = models[rpi_board_rev].name;
 314         printf("RPI %s\n", name);
 315 }
 316
 317 int board_init(void)
 318 {
 319         get_board_rev();
 320
 321         gd->bd->bi_boot_params = 0x100;
 322
 323         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 324 }
 325
 326 int board_mmc_init(bd_t *bis)
 327 {
 328         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 329         int ret;
 330
 331         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 332
 333         BCM2835_MBOX_INIT_HDR(msg_clk);
 334         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 335         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 336
 337         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 338         if (ret) {
 339                 printf("bcm2835: Could not query eMMC clock rate\n");
 340                 return -1;
 341         }
 342
 343         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 344                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 345 }
 346
 347 int ft_board_setup(void *blob, bd_t *bd)
 348 {
 349         /*
 350          * For now, we simply always add the simplefb DT node. Later, we
 351          * should be more intelligent, and e.g. only do this if no enabled DT
 352          * node exists for the "real" graphics driver.
 353          */
 354         lcd_dt_simplefb_add_node(blob);
 355
 356         return 0;
 357 }