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 <mmc.h>
  14 #include <asm/gpio.h>
  15 #include <asm/arch/mbox.h>
  16 #include <asm/arch/sdhci.h>
  17 #include <asm/global_data.h>
  18 #include <dm/platform_data/serial_pl01x.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 static const struct bcm2835_gpio_platdata gpio_platdata = {
  23         .base = BCM2835_GPIO_BASE,
  24 };
  25
  26 U_BOOT_DEVICE(bcm2835_gpios) = {
  27         .name = "gpio_bcm2835",
  28         .platdata = &gpio_platdata,
  29 };
  30
  31 static const struct pl01x_serial_platdata serial_platdata = {
  32 #ifdef CONFIG_BCM2836
  33         .base = 0x3f201000,
  34 #else
  35         .base = 0x20201000,
  36 #endif
  37         .type = TYPE_PL011,
  38         .clock = 3000000,
  39 };
  40
  41 U_BOOT_DEVICE(bcm2835_serials) = {
  42         .name = "serial_pl01x",
  43         .platdata = &serial_platdata,
  44 };
  45
  46 struct msg_get_arm_mem {
  47         struct bcm2835_mbox_hdr hdr;
  48         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  49         u32 end_tag;
  50 };
  51
  52 struct msg_get_board_rev {
  53         struct bcm2835_mbox_hdr hdr;
  54         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  55         u32 end_tag;
  56 };
  57
  58 struct msg_get_mac_address {
  59         struct bcm2835_mbox_hdr hdr;
  60         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  61         u32 end_tag;
  62 };
  63
  64 struct msg_set_power_state {
  65         struct bcm2835_mbox_hdr hdr;
  66         struct bcm2835_mbox_tag_set_power_state set_power_state;
  67         u32 end_tag;
  68 };
  69
  70 struct msg_get_clock_rate {
  71         struct bcm2835_mbox_hdr hdr;
  72         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  73         u32 end_tag;
  74 };
  75
  76 /* See comments in mbox.h for data source */
  77 static const struct {
  78         const char *name;
  79         const char *fdtfile;
  80         bool has_onboard_eth;
  81 } models[] = {
  82         [0] = {
  83                 "Unknown model",
  84 #ifdef CONFIG_BCM2836
  85                 "bcm2836-rpi-other.dtb",
  86 #else
  87                 "bcm2835-rpi-other.dtb",
  88 #endif
  89                 false,
  90         },
  91 #ifdef CONFIG_BCM2836
  92         [BCM2836_BOARD_REV_2_B] = {
  93                 "2 Model B",
  94                 "bcm2836-rpi-2-b.dtb",
  95                 true,
  96         },
  97 #else
  98         [BCM2835_BOARD_REV_B_I2C0_2] = {
  99                 "Model B (no P5)",
 100                 "bcm2835-rpi-b-i2c0.dtb",
 101                 true,
 102         },
 103         [BCM2835_BOARD_REV_B_I2C0_3] = {
 104                 "Model B (no P5)",
 105                 "bcm2835-rpi-b-i2c0.dtb",
 106                 true,
 107         },
 108         [BCM2835_BOARD_REV_B_I2C1_4] = {
 109                 "Model B",
 110                 "bcm2835-rpi-b.dtb",
 111                 true,
 112         },
 113         [BCM2835_BOARD_REV_B_I2C1_5] = {
 114                 "Model B",
 115                 "bcm2835-rpi-b.dtb",
 116                 true,
 117         },
 118         [BCM2835_BOARD_REV_B_I2C1_6] = {
 119                 "Model B",
 120                 "bcm2835-rpi-b.dtb",
 121                 true,
 122         },
 123         [BCM2835_BOARD_REV_A_7] = {
 124                 "Model A",
 125                 "bcm2835-rpi-a.dtb",
 126                 false,
 127         },
 128         [BCM2835_BOARD_REV_A_8] = {
 129                 "Model A",
 130                 "bcm2835-rpi-a.dtb",
 131                 false,
 132         },
 133         [BCM2835_BOARD_REV_A_9] = {
 134                 "Model A",
 135                 "bcm2835-rpi-a.dtb",
 136                 false,
 137         },
 138         [BCM2835_BOARD_REV_B_REV2_d] = {
 139                 "Model B rev2",
 140                 "bcm2835-rpi-b-rev2.dtb",
 141                 true,
 142         },
 143         [BCM2835_BOARD_REV_B_REV2_e] = {
 144                 "Model B rev2",
 145                 "bcm2835-rpi-b-rev2.dtb",
 146                 true,
 147         },
 148         [BCM2835_BOARD_REV_B_REV2_f] = {
 149                 "Model B rev2",
 150                 "bcm2835-rpi-b-rev2.dtb",
 151                 true,
 152         },
 153         [BCM2835_BOARD_REV_B_PLUS] = {
 154                 "Model B+",
 155                 "bcm2835-rpi-b-plus.dtb",
 156                 true,
 157         },
 158         [BCM2835_BOARD_REV_CM] = {
 159                 "Compute Module",
 160                 "bcm2835-rpi-cm.dtb",
 161                 false,
 162         },
 163         [BCM2835_BOARD_REV_A_PLUS] = {
 164                 "Model A+",
 165                 "bcm2835-rpi-a-plus.dtb",
 166                 false,
 167         },
 168         [BCM2835_BOARD_REV_B_PLUS_13] = {
 169                 "Model B+",
 170                 "bcm2835-rpi-b-plus.dtb",
 171                 true,
 172         },
 173         [BCM2835_BOARD_REV_CM_14] = {
 174                 "Compute Module",
 175                 "bcm2835-rpi-cm.dtb",
 176                 false,
 177         },
 178 #endif
 179 };
 180
 181 u32 rpi_board_rev = 0;
 182
 183 int dram_init(void)
 184 {
 185         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 186         int ret;
 187
 188         BCM2835_MBOX_INIT_HDR(msg);
 189         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 190
 191         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 192         if (ret) {
 193                 printf("bcm2835: Could not query ARM memory size\n");
 194                 return -1;
 195         }
 196
 197         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 198
 199         return 0;
 200 }
 201
 202 static void set_fdtfile(void)
 203 {
 204         const char *fdtfile;
 205
 206         if (getenv("fdtfile"))
 207                 return;
 208
 209         fdtfile = models[rpi_board_rev].fdtfile;
 210         setenv("fdtfile", fdtfile);
 211 }
 212
 213 static void set_usbethaddr(void)
 214 {
 215         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 216         int ret;
 217
 218         if (!models[rpi_board_rev].has_onboard_eth)
 219                 return;
 220
 221         if (getenv("usbethaddr"))
 222                 return;
 223
 224         BCM2835_MBOX_INIT_HDR(msg);
 225         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 226
 227         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 228         if (ret) {
 229                 printf("bcm2835: Could not query MAC address\n");
 230                 /* Ignore error; not critical */
 231                 return;
 232         }
 233
 234         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 235
 236         return;
 237 }
 238
 239 int misc_init_r(void)
 240 {
 241         set_fdtfile();
 242         set_usbethaddr();
 243         return 0;
 244 }
 245
 246 static int power_on_module(u32 module)
 247 {
 248         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 249         int ret;
 250
 251         BCM2835_MBOX_INIT_HDR(msg_pwr);
 252         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 253                               SET_POWER_STATE);
 254         msg_pwr->set_power_state.body.req.device_id = module;
 255         msg_pwr->set_power_state.body.req.state =
 256                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 257                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 258
 259         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 260                                      &msg_pwr->hdr);
 261         if (ret) {
 262                 printf("bcm2835: Could not set module %u power state\n",
 263                        module);
 264                 return -1;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static void get_board_rev(void)
 271 {
 272         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 273         int ret;
 274         const char *name;
 275
 276         BCM2835_MBOX_INIT_HDR(msg);
 277         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 278
 279         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 280         if (ret) {
 281                 printf("bcm2835: Could not query board revision\n");
 282                 /* Ignore error; not critical */
 283                 return;
 284         }
 285
 286         /*
 287          * For details of old-vs-new scheme, see:
 288          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 289          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 290          * (a few posts down)
 291          *
 292          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 293          * lower byte to use as the board rev:
 294          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 295          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 296          */
 297         rpi_board_rev = msg->get_board_rev.body.resp.rev;
 298         if (rpi_board_rev & 0x800000)
 299                 rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
 300         else
 301                 rpi_board_rev &= 0xff;
 302         if (rpi_board_rev >= ARRAY_SIZE(models)) {
 303                 printf("RPI: Board rev %u outside known range\n",
 304                        rpi_board_rev);
 305                 rpi_board_rev = 0;
 306         }
 307         if (!models[rpi_board_rev].name) {
 308                 printf("RPI: Board rev %u unknown\n", rpi_board_rev);
 309                 rpi_board_rev = 0;
 310         }
 311
 312         name = models[rpi_board_rev].name;
 313         printf("RPI %s\n", name);
 314 }
 315
 316 int board_init(void)
 317 {
 318         get_board_rev();
 319
 320         gd->bd->bi_boot_params = 0x100;
 321
 322         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 323 }
 324
 325 int board_mmc_init(bd_t *bis)
 326 {
 327         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 328         int ret;
 329
 330         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 331
 332         BCM2835_MBOX_INIT_HDR(msg_clk);
 333         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 334         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 335
 336         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 337         if (ret) {
 338                 printf("bcm2835: Could not query eMMC clock rate\n");
 339                 return -1;
 340         }
 341
 342         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 343                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 344 }
 345
 346 int ft_board_setup(void *blob, bd_t *bd)
 347 {
 348         /*
 349          * For now, we simply always add the simplefb DT node. Later, we
 350          * should be more intelligent, and e.g. only do this if no enabled DT
 351          * node exists for the "real" graphics driver.
 352          */
 353         lcd_dt_simplefb_add_node(blob);
 354
 355         return 0;
 356 }