include/configs/rpi_b.h

   1 /*
   2  * (C) Copyright 2012 Stephen Warren
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #ifndef __CONFIG_H
  18 #define __CONFIG_H
  19
  20 #include <linux/sizes.h>
  21
  22 /* Architecture, CPU, etc.*/
  23 #define CONFIG_ARM1176
  24 #define CONFIG_BCM2835
  25 #define CONFIG_ARCH_CPU_INIT
  26 #define CONFIG_SYS_DCACHE_OFF
  27 /*
  28  * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
  29  * so 2708 has historically been used rather than a dedicated 2835 ID.
  30  */
  31 #define CONFIG_MACH_TYPE                MACH_TYPE_BCM2708
  32
  33 /* Memory layout */
  34 #define CONFIG_NR_DRAM_BANKS            1
  35 #define CONFIG_SYS_SDRAM_BASE           0x00000000
  36 #define CONFIG_SYS_TEXT_BASE            0x00008000
  37 #define CONFIG_SYS_UBOOT_BASE           CONFIG_SYS_TEXT_BASE
  38 /*
  39  * The board really has 256M. However, the VC (VideoCore co-processor) shares
  40  * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
  41  * smaller amount of RAM is present in order to avoid stomping on the area
  42  * the VC uses.
  43  */
  44 #define CONFIG_SYS_SDRAM_SIZE           SZ_128M
  45 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + \
  46                                          CONFIG_SYS_SDRAM_SIZE - \
  47                                          GENERATED_GBL_DATA_SIZE)
  48 #define CONFIG_SYS_MALLOC_LEN           SZ_4M
  49 #define CONFIG_SYS_MEMTEST_START        0x00100000
  50 #define CONFIG_SYS_MEMTEST_END          0x00200000
  51 #define CONFIG_LOADADDR                 0x00200000
  52
  53 /* Flash */
  54 #define CONFIG_SYS_NO_FLASH
  55
  56 /* Devices */
  57 /* GPIO */
  58 #define CONFIG_BCM2835_GPIO
  59 /* LCD */
  60 #define CONFIG_LCD
  61 #define CONFIG_LCD_DT_SIMPLEFB
  62 #define LCD_BPP                         LCD_COLOR16
  63 /*
  64  * Prevent allocation of RAM for FB; the real FB address is queried
  65  * dynamically from the VideoCore co-processor, and comes from RAM
  66  * not owned by the ARM CPU.
  67  */
  68 #define CONFIG_FB_ADDR                  0
  69 #define CONFIG_VIDEO_BCM2835
  70 #define CONFIG_SYS_WHITE_ON_BLACK
  71
  72 /* SD/MMC configuration */
  73 #define CONFIG_GENERIC_MMC
  74 #define CONFIG_MMC
  75 #define CONFIG_SDHCI
  76 #define CONFIG_MMC_SDHCI_IO_ACCESSORS
  77 #define CONFIG_BCM2835_SDHCI
  78
  79 /* Console UART */
  80 #define CONFIG_PL011_SERIAL
  81 #define CONFIG_PL011_CLOCK              3000000
  82 #define CONFIG_PL01x_PORTS              { (void *)0x20201000 }
  83 #define CONFIG_CONS_INDEX               0
  84 #define CONFIG_BAUDRATE                 115200
  85
  86 /* Console configuration */
  87 #define CONFIG_SYS_CBSIZE               1024
  88 #define CONFIG_SYS_PBSIZE               (CONFIG_SYS_CBSIZE +            \
  89                                          sizeof(CONFIG_SYS_PROMPT) + 16)
  90
  91 /* Environment */
  92 #define CONFIG_ENV_SIZE                 SZ_16K
  93 #define CONFIG_ENV_IS_NOWHERE
  94 #define CONFIG_ENV_VARS_UBOOT_CONFIG
  95 #define CONFIG_SYS_LOAD_ADDR            0x1000000
  96 #define CONFIG_CONSOLE_MUX
  97 #define CONFIG_SYS_CONSOLE_IS_IN_ENV
  98 #define CONFIG_PREBOOT \
  99         "if load mmc 0:1 ${loadaddr} /uEnv.txt; then " \
 100                 "env import -t ${loadaddr} ${filesize}; " \
 101         "fi"
 102
 103 #define ENV_DEVICE_SETTINGS \
 104         "stdin=serial,lcd\0" \
 105         "stdout=serial,lcd\0" \
 106         "stderr=serial,lcd\0"
 107
 108 /*
 109  * Memory layout for where various images get loaded by boot scripts:
 110  *
 111  * scriptaddr can be pretty much anywhere that doesn't conflict with something
 112  *   else. Put it low in memory to avoid conflicts.
 113  *
 114  * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
 115  *   something else. Put it low in memory to avoid conflicts.
 116  *
 117  * kernel_addr_r must be within the first 128M of RAM in order for the
 118  *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
 119  *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
 120  *   should not overlap that area, or the kernel will have to copy itself
 121  *   somewhere else before decompression. Similarly, the address of any other
 122  *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
 123  *   this up to 16M allows for a sizable kernel to be decompressed below the
 124  *   compressed load address.
 125  *
 126  * fdt_addr_r simply shouldn't overlap anything else. Choosing 32M allows for
 127  *   the compressed kernel to be up to 16M too.
 128  *
 129  * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
 130  *   for the FDT/DTB to be up to 1M, which is hopefully plenty.
 131  */
 132 #define ENV_MEM_LAYOUT_SETTINGS \
 133         "scriptaddr=0x00000000\0" \
 134         "pxefile_addr_r=0x00100000\0" \
 135         "kernel_addr_r=0x01000000\0" \
 136         "fdt_addr_r=0x02000000\0" \
 137         "fdtfile=bcm2835-rpi-b.dtb\0" \
 138         "ramdisk_addr_r=0x02100000\0" \
 139
 140 #define BOOTCMDS_MMC \
 141         "mmc_boot=" \
 142                 "setenv devtype mmc; " \
 143                 "if mmc dev ${devnum}; then " \
 144                         "run scan_boot; " \
 145                 "fi\0" \
 146         "bootcmd_mmc0=setenv devnum 0; run mmc_boot;\0"
 147 #define BOOT_TARGETS_MMC "mmc0"
 148
 149 #define BOOTCMDS_COMMON \
 150         "rootpart=1\0" \
 151         \
 152         "do_script_boot="                                                 \
 153                 "load ${devtype} ${devnum}:${rootpart} "                  \
 154                         "${scriptaddr} ${prefix}${script}; "              \
 155                 "source ${scriptaddr}\0"                                  \
 156         \
 157         "script_boot="                                                    \
 158                 "for script in ${boot_scripts}; do "                      \
 159                         "if test -e ${devtype} ${devnum}:${rootpart} "    \
 160                                         "${prefix}${script}; then "       \
 161                                 "echo Found ${prefix}${script}; "         \
 162                                 "run do_script_boot; "                    \
 163                                 "echo SCRIPT FAILED: continuing...; "     \
 164                         "fi; "                                            \
 165                 "done\0"                                                  \
 166         \
 167         "do_sysboot_boot="                                                \
 168                 "sysboot ${devtype} ${devnum}:${rootpart} any "           \
 169                         "${scriptaddr} ${prefix}extlinux/extlinux.conf\0" \
 170         \
 171         "sysboot_boot="                                                   \
 172                 "if test -e ${devtype} ${devnum}:${rootpart} "            \
 173                                 "${prefix}extlinux/extlinux.conf; then "  \
 174                         "echo Found ${prefix}extlinux/extlinux.conf; "    \
 175                         "run do_sysboot_boot; "                           \
 176                         "echo SCRIPT FAILED: continuing...; "             \
 177                 "fi\0"                                                    \
 178         \
 179         "scan_boot="                                                      \
 180                 "echo Scanning ${devtype} ${devnum}...; "                 \
 181                 "for prefix in ${boot_prefixes}; do "                     \
 182                         "run sysboot_boot; "                              \
 183                         "run script_boot; "                               \
 184                 "done\0"                                                  \
 185         \
 186         "boot_targets=" \
 187                 BOOT_TARGETS_MMC " " \
 188                 "\0" \
 189         \
 190         "boot_prefixes=/\0" \
 191         \
 192         "boot_scripts=boot.scr.uimg\0" \
 193         \
 194         BOOTCMDS_MMC
 195
 196 #define CONFIG_BOOTCOMMAND \
 197         "for target in ${boot_targets}; do run bootcmd_${target}; done"
 198
 199 #define CONFIG_BOOTCOMMAND \
 200         "for target in ${boot_targets}; do run bootcmd_${target}; done"
 201
 202 #define CONFIG_EXTRA_ENV_SETTINGS \
 203         ENV_DEVICE_SETTINGS \
 204         ENV_MEM_LAYOUT_SETTINGS \
 205         BOOTCMDS_COMMON
 206
 207 #define CONFIG_BOOTDELAY 2
 208
 209 /* Shell */
 210 #define CONFIG_SYS_MAXARGS              8
 211 #define CONFIG_SYS_PROMPT               "U-Boot> "
 212 #define CONFIG_COMMAND_HISTORY
 213
 214 /* Commands */
 215 #include <config_cmd_default.h>
 216 #define CONFIG_CMD_GPIO
 217 #define CONFIG_CMD_MMC
 218 #define CONFIG_PARTITION_UUIDS
 219 #define CONFIG_CMD_PART
 220
 221 /* Device tree support */
 222 #define CONFIG_OF_BOARD_SETUP
 223 /* ATAGs support for bootm/bootz */
 224 #define CONFIG_SETUP_MEMORY_TAGS
 225 #define CONFIG_CMDLINE_TAG
 226 #define CONFIG_INITRD_TAG
 227
 228 #include <config_distro_defaults.h>
 229
 230 /* Some things don't make sense on this HW or yet */
 231 #undef CONFIG_CMD_FPGA
 232 #undef CONFIG_CMD_NET
 233 #undef CONFIG_CMD_NFS
 234 #undef CONFIG_CMD_SAVEENV
 235 #undef CONFIG_CMD_DHCP
 236 #undef CONFIG_CMD_MII
 237 #undef CONFIG_CMD_NET
 238 #undef CONFIG_CMD_PING
 239
 240 #endif