board/raspberrypi/rpi/rpi.c

   1 /*
   2  * (C) Copyright 2012-2013 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         .base = 0x20201000,
  33         .type = TYPE_PL011,
  34         .clock = 3000000,
  35 };
  36
  37 U_BOOT_DEVICE(bcm2835_serials) = {
  38         .name = "serial_pl01x",
  39         .platdata = &serial_platdata,
  40 };
  41
  42 struct msg_get_arm_mem {
  43         struct bcm2835_mbox_hdr hdr;
  44         struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
  45         u32 end_tag;
  46 };
  47
  48 struct msg_get_board_rev {
  49         struct bcm2835_mbox_hdr hdr;
  50         struct bcm2835_mbox_tag_get_board_rev get_board_rev;
  51         u32 end_tag;
  52 };
  53
  54 struct msg_get_mac_address {
  55         struct bcm2835_mbox_hdr hdr;
  56         struct bcm2835_mbox_tag_get_mac_address get_mac_address;
  57         u32 end_tag;
  58 };
  59
  60 struct msg_set_power_state {
  61         struct bcm2835_mbox_hdr hdr;
  62         struct bcm2835_mbox_tag_set_power_state set_power_state;
  63         u32 end_tag;
  64 };
  65
  66 struct msg_get_clock_rate {
  67         struct bcm2835_mbox_hdr hdr;
  68         struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
  69         u32 end_tag;
  70 };
  71
  72 /* See comments in mbox.h for data source */
  73 static const struct {
  74         const char *name;
  75         const char *fdtfile;
  76         bool has_onboard_eth;
  77 } models[] = {
  78         [0] = {
  79                 "Unknown model",
  80                 "bcm2835-rpi-other.dtb",
  81                 false,
  82         },
  83         [BCM2835_BOARD_REV_B_I2C0_2] = {
  84                 "Model B (no P5)",
  85                 "bcm2835-rpi-b-i2c0.dtb",
  86                 true,
  87         },
  88         [BCM2835_BOARD_REV_B_I2C0_3] = {
  89                 "Model B (no P5)",
  90                 "bcm2835-rpi-b-i2c0.dtb",
  91                 true,
  92         },
  93         [BCM2835_BOARD_REV_B_I2C1_4] = {
  94                 "Model B",
  95                 "bcm2835-rpi-b.dtb",
  96                 true,
  97         },
  98         [BCM2835_BOARD_REV_B_I2C1_5] = {
  99                 "Model B",
 100                 "bcm2835-rpi-b.dtb",
 101                 true,
 102         },
 103         [BCM2835_BOARD_REV_B_I2C1_6] = {
 104                 "Model B",
 105                 "bcm2835-rpi-b.dtb",
 106                 true,
 107         },
 108         [BCM2835_BOARD_REV_A_7] = {
 109                 "Model A",
 110                 "bcm2835-rpi-a.dtb",
 111                 false,
 112         },
 113         [BCM2835_BOARD_REV_A_8] = {
 114                 "Model A",
 115                 "bcm2835-rpi-a.dtb",
 116                 false,
 117         },
 118         [BCM2835_BOARD_REV_A_9] = {
 119                 "Model A",
 120                 "bcm2835-rpi-a.dtb",
 121                 false,
 122         },
 123         [BCM2835_BOARD_REV_B_REV2_d] = {
 124                 "Model B rev2",
 125                 "bcm2835-rpi-b-rev2.dtb",
 126                 true,
 127         },
 128         [BCM2835_BOARD_REV_B_REV2_e] = {
 129                 "Model B rev2",
 130                 "bcm2835-rpi-b-rev2.dtb",
 131                 true,
 132         },
 133         [BCM2835_BOARD_REV_B_REV2_f] = {
 134                 "Model B rev2",
 135                 "bcm2835-rpi-b-rev2.dtb",
 136                 true,
 137         },
 138         [BCM2835_BOARD_REV_B_PLUS] = {
 139                 "Model B+",
 140                 "bcm2835-rpi-b-plus.dtb",
 141                 true,
 142         },
 143         [BCM2835_BOARD_REV_CM] = {
 144                 "Compute Module",
 145                 "bcm2835-rpi-cm.dtb",
 146                 false,
 147         },
 148         [BCM2835_BOARD_REV_A_PLUS] = {
 149                 "Model A+",
 150                 "bcm2835-rpi-a-plus.dtb",
 151                 false,
 152         },
 153 };
 154
 155 u32 rpi_board_rev = 0;
 156
 157 int dram_init(void)
 158 {
 159         ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16);
 160         int ret;
 161
 162         BCM2835_MBOX_INIT_HDR(msg);
 163         BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
 164
 165         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 166         if (ret) {
 167                 printf("bcm2835: Could not query ARM memory size\n");
 168                 return -1;
 169         }
 170
 171         gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
 172
 173         return 0;
 174 }
 175
 176 static void set_fdtfile(void)
 177 {
 178         const char *fdtfile;
 179
 180         if (getenv("fdtfile"))
 181                 return;
 182
 183         fdtfile = models[rpi_board_rev].fdtfile;
 184         setenv("fdtfile", fdtfile);
 185 }
 186
 187 static void set_usbethaddr(void)
 188 {
 189         ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16);
 190         int ret;
 191
 192         if (!models[rpi_board_rev].has_onboard_eth)
 193                 return;
 194
 195         if (getenv("usbethaddr"))
 196                 return;
 197
 198         BCM2835_MBOX_INIT_HDR(msg);
 199         BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
 200
 201         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 202         if (ret) {
 203                 printf("bcm2835: Could not query MAC address\n");
 204                 /* Ignore error; not critical */
 205                 return;
 206         }
 207
 208         eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
 209
 210         return;
 211 }
 212
 213 int misc_init_r(void)
 214 {
 215         set_fdtfile();
 216         set_usbethaddr();
 217         return 0;
 218 }
 219
 220 static int power_on_module(u32 module)
 221 {
 222         ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16);
 223         int ret;
 224
 225         BCM2835_MBOX_INIT_HDR(msg_pwr);
 226         BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
 227                               SET_POWER_STATE);
 228         msg_pwr->set_power_state.body.req.device_id = module;
 229         msg_pwr->set_power_state.body.req.state =
 230                 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
 231                 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
 232
 233         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
 234                                      &msg_pwr->hdr);
 235         if (ret) {
 236                 printf("bcm2835: Could not set module %u power state\n",
 237                        module);
 238                 return -1;
 239         }
 240
 241         return 0;
 242 }
 243
 244 static void get_board_rev(void)
 245 {
 246         ALLOC_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1, 16);
 247         int ret;
 248         const char *name;
 249
 250         BCM2835_MBOX_INIT_HDR(msg);
 251         BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
 252
 253         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
 254         if (ret) {
 255                 printf("bcm2835: Could not query board revision\n");
 256                 /* Ignore error; not critical */
 257                 return;
 258         }
 259
 260         rpi_board_rev = msg->get_board_rev.body.resp.rev;
 261         if (rpi_board_rev >= ARRAY_SIZE(models)) {
 262                 printf("RPI: Board rev %u outside known range\n",
 263                        rpi_board_rev);
 264                 rpi_board_rev = 0;
 265         }
 266         if (!models[rpi_board_rev].name) {
 267                 printf("RPI: Board rev %u unknown\n", rpi_board_rev);
 268                 rpi_board_rev = 0;
 269         }
 270
 271         name = models[rpi_board_rev].name;
 272         printf("RPI model: %s\n", name);
 273 }
 274
 275 int board_init(void)
 276 {
 277         get_board_rev();
 278
 279         gd->bd->bi_boot_params = 0x100;
 280
 281         return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
 282 }
 283
 284 int board_mmc_init(bd_t *bis)
 285 {
 286         ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16);
 287         int ret;
 288
 289         power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
 290
 291         BCM2835_MBOX_INIT_HDR(msg_clk);
 292         BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
 293         msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
 294
 295         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
 296         if (ret) {
 297                 printf("bcm2835: Could not query eMMC clock rate\n");
 298                 return -1;
 299         }
 300
 301         return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
 302                                   msg_clk->get_clock_rate.body.resp.rate_hz);
 303 }
 304
 305 int ft_board_setup(void *blob, bd_t *bd)
 306 {
 307         /*
 308          * For now, we simply always add the simplefb DT node. Later, we
 309          * should be more intelligent, and e.g. only do this if no enabled DT
 310          * node exists for the "real" graphics driver.
 311          */
 312         lcd_dt_simplefb_add_node(blob);
 313
 314         return 0;
 315 }