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         [BCM2835_BOARD_REV_A_PLUS_15] = {
 180                 "Model A+",
 181                 "bcm2835-rpi-a-plus.dtb",
 182                 false,
 183         },
 184 #endif
 185 };
 186
 187 u32 rpi_board_rev = 0;
 188
 189 int dram_init(void)
 190 {
 191         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
 192         int ret;
 193
 194         BCM2835_MBOX_INIT_HDR(msg);
 195         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 196
 197         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 198         if (ret) {
 199                 printf("bcm2835: Could not query ARM memory size\n");
 200                 return -1;
 201         }
 202
 203         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 204
 205         return 0;
 206 }
 207
 208 static void set_fdtfile(void)
 209 {
 210         const char *fdtfile;
 211
 212         if (getenv("fdtfile"))
 213                 return;
 214
 215         fdtfile = models[rpi_board_rev].fdtfile;
 216         setenv("fdtfile", fdtfile);
 217 }
 218
 219 static void set_usbethaddr(void)
 220 {
 221         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
 222         int ret;
 223
 224         if (!models[rpi_board_rev].has_onboard_eth)
 225                 return;
 226
 227         if (getenv("usbethaddr"))
 228                 return;
 229
 230         BCM2835_MBOX_INIT_HDR(msg);
 231         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 232
 233         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 234         if (ret) {
 235                 printf("bcm2835: Could not query MAC address\n");
 236                 /* Ignore error; not critical */
 237                 return;
 238         }
 239
 240         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 241
 242         return;
 243 }
 244
 245 int misc_init_r(void)
 246 {
 247         set_fdtfile();
 248         set_usbethaddr();
 249         return 0;
 250 }
 251
 252 static int power_on_module(u32 module)
 253 {
 254         ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
 255         int ret;
 256
 257         BCM2835_MBOX_INIT_HDR(msg_pwr);
 258         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 259                               SET_POWER_STATE);
 260         msg_pwr->set_power_state.body.req.device_id = module;
 261         msg_pwr->set_power_state.body.req.state =
 262                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 263                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 264
 265         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 266                                      &msg_pwr->hdr);
 267         if (ret) {
 268                 printf("bcm2835: Could not set module %u power state\n",
 269                        module);
 270                 return -1;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static void get_board_rev(void)
 277 {
 278         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
 279         int ret;
 280         const char *name;
 281
 282         BCM2835_MBOX_INIT_HDR(msg);
 283         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 284
 285         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 286         if (ret) {
 287                 printf("bcm2835: Could not query board revision\n");
 288                 /* Ignore error; not critical */
 289                 return;
 290         }
 291
 292         /*
 293          * For details of old-vs-new scheme, see:
 294          * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
 295          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
 296          * (a few posts down)
 297          *
 298          * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
 299          * lower byte to use as the board rev:
 300          * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
 301          * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
 302          */
 303         rpi_board_rev = msg->get_board_rev.body.resp.rev;
 304         if (rpi_board_rev & 0x800000)
 305                 rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
 306         else
 307                 rpi_board_rev &= 0xff;
 308         if (rpi_board_rev >= ARRAY_SIZE(models)) {
 309                 printf("RPI: Board rev %u outside known range\n",
 310                        rpi_board_rev);
 311                 rpi_board_rev = 0;
 312         }
 313         if (!models[rpi_board_rev].name) {
 314                 printf("RPI: Board rev %u unknown\n", rpi_board_rev);
 315                 rpi_board_rev = 0;
 316         }
 317
 318         name = models[rpi_board_rev].name;
 319         printf("RPI %s\n", name);
 320 }
 321
 322 int board_init(void)
 323 {
 324         get_board_rev();
 325
 326         gd->bd->bi_boot_params = 0x100;
 327
 328         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 329 }
 330
 331 int board_mmc_init(bd_t *bis)
 332 {
 333         ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
 334         int ret;
 335
 336         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 337
 338         BCM2835_MBOX_INIT_HDR(msg_clk);
 339         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 340         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 341
 342         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 343         if (ret) {
 344                 printf("bcm2835: Could not query eMMC clock rate\n");
 345                 return -1;
 346         }
 347
 348         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 349                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 350 }
 351
 352 int ft_board_setup(void *blob, bd_t *bd)
 353 {
 354         /*
 355          * For now, we simply always add the simplefb DT node. Later, we
 356          * should be more intelligent, and e.g. only do this if no enabled DT
 357          * node exists for the "real" graphics driver.
 358          */
 359         lcd_dt_simplefb_add_node(blob);
 360
 361         return 0;
 362 }