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ARM: add Raspberry Pi model B board, using BCM2835 SoC

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The Raspberry Pi model B uses the BCM2835 SoC, has 256MB of RAM,
contains an SMSC 9512 USB LAN/Hub chip, and various IO connectors.
For more details, see http://www.raspberrypi.org/.

Various portions (cache enable, MACH_TYPE setup, RAM size limit, stack
relocation to top of RAM) extracted from work by:
Oleksandr Tymoshenko <gonzo@bluezbox.com>.

GPIO driver enablement by Vikram Narayanan <vikram186@gmail.com>.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Tom Rini <trini@ti.com>
This commit is contained in:
Stephen Warren 2012-08-05 16:07:22 +00:00 committed by Albert ARIBAUD
parent efad6cf881
commit 0d04f34a35
5 changed files with 177 additions and 0 deletions
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4
MAINTAINERS
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@ -952,6 +952,10 @@ Stephen Warren <swarren@nvidia.com>
trimslice Tegra2 (ARM7 & A9 Dual Core)
whistler Tegra2 (ARM7 & A9 Dual Core)
Stephen Warren <swarren@wwwdotorg.org>
rpi_b BCM2835 (ARM1176)
Thomas Weber <weber@corscience.de>
devkit8000 ARM ARMV7 (OMAP3530 SoC)

34
board/raspberrypi/rpi_b/Makefile Normal file
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@ -0,0 +1,34 @@
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
include $(TOPDIR)/config.mk
LIB = $(obj)lib$(BOARD).o
COBJS := $(BOARD).o
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
$(LIB): $(obj).depend $(OBJS)
$(call cmd_link_o_target, $(OBJS))
#########################################################################
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend
#########################################################################

34
board/raspberrypi/rpi_b/rpi_b.c Normal file
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@ -0,0 +1,34 @@
/*
* (C) Copyright 2012 Stephen Warren
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
return 0;
}
int board_init(void)
{
gd->bd->bi_boot_params = 0x100;
return 0;
}

1
boards.cfg
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@ -53,6 +53,7 @@ mx35pdk arm arm1136 - freesca
apollon arm arm1136 apollon - omap24xx
omap2420h4 arm arm1136 - ti omap24xx
tnetv107x_evm arm arm1176 tnetv107xevm ti tnetv107x
rpi_b arm arm1176 rpi_b raspberrypi bcm2835
integratorap_cm720t arm arm720t integrator armltd - integratorap:CM720T
integratorap_cm920t arm arm920t integrator armltd - integratorap:CM920T
integratorcp_cm920t arm arm920t integrator armltd - integratorcp:CM920T

104
include/configs/rpi_b.h Normal file
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@ -0,0 +1,104 @@
/*
* (C) Copyright 2012 Stephen Warren
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#include <asm/sizes.h>
/* Architecture, CPU, etc.*/
#define CONFIG_ARM1176
#define CONFIG_BCM2835
#define CONFIG_ARCH_CPU_INIT
/*
* 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
* so 2708 has historically been used rather than a dedicated 2835 ID.
*/
#define CONFIG_MACH_TYPE MACH_TYPE_BCM2708
/* Timer */
#define CONFIG_SYS_HZ 1000000
/* Memory layout */
#define CONFIG_NR_DRAM_BANKS 1
#define CONFIG_SYS_SDRAM_BASE 0x00000000
#define CONFIG_SYS_TEXT_BASE 0x00008000
#define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE
/*
* The board really has 256M. However, the VC (VideoCore co-processor) shares
* the RAM, and uses a configurable portion at the top. We tell U-Boot that a
* smaller amount of RAM is present in order to avoid stomping on the area
* the VC uses.
*/
#define CONFIG_SYS_SDRAM_SIZE SZ_128M
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
CONFIG_SYS_SDRAM_SIZE - \
GENERATED_GBL_DATA_SIZE)
#define CONFIG_SYS_MALLOC_LEN SZ_4M
#define CONFIG_SYS_MEMTEST_START 0x00100000
#define CONFIG_SYS_MEMTEST_END 0x00200000
/* Flash */
#define CONFIG_SYS_NO_FLASH
/* Devices */
/* GPIO */
#define CONFIG_BCM2835_GPIO
/* Console UART */
#define CONFIG_PL011_SERIAL
#define CONFIG_PL011_CLOCK 3000000
#define CONFIG_PL01x_PORTS { (void *)0x20201000 }
#define CONFIG_CONS_INDEX 0
#define CONFIG_BAUDRATE 115200
/* Console configuration */
#define CONFIG_SYS_CBSIZE 1024
#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
sizeof(CONFIG_SYS_PROMPT) + 16)
/* Environment */
#define CONFIG_ENV_SIZE SZ_16K
#define CONFIG_ENV_IS_NOWHERE
#define CONFIG_SYS_LOAD_ADDR 0x1000000
/* Shell */
#define CONFIG_SYS_HUSH_PARSER
#define CONFIG_SYS_MAXARGS 8
#define CONFIG_SYS_PROMPT "U-Boot> "
#define CONFIG_SYS_LONGHELP
#define CONFIG_CMDLINE_EDITING
#define CONFIG_COMMAND_HISTORY
#define CONFIG_AUTO_COMPLETE
/* Commands */
#include <config_cmd_default.h>
#define CONFIG_CMD_BOOTZ
#define CONFIG_CMD_GPIO
/* Some things don't make sense on this HW or yet */
#undef CONFIG_CMD_FPGA
#undef CONFIG_CMD_NET
#undef CONFIG_CMD_NFS
#undef CONFIG_CMD_SAVEENV
/* Device tree support for bootm/bootz */
#define CONFIG_OF_LIBFDT
/* ATAGs support for bootm/bootz */
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_CMDLINE_TAG
#define CONFIG_INITRD_TAG
#endif