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 --- v4: Remove redundant CONFIG_SYS_BAUDRATE_TABLE, CONFIG_SYS_PROMPT_HUSH_PS2. v3: Squash a number of patches into this single patch. --- MAINTAINERS | 4 ++ board/raspberrypi/rpi_b/Makefile | 34 +++++++++++++ board/raspberrypi/rpi_b/rpi_b.c | 34 +++++++++++++ boards.cfg | 1 + include/configs/rpi_b.h | 104 ++++++++++++++++++++++++++++++++++++++ 5 files changed, 177 insertions(+) create mode 100644 board/raspberrypi/rpi_b/Makefile create mode 100644 board/raspberrypi/rpi_b/rpi_b.c create mode 100644 include/configs/rpi_b.h
diff --git a/MAINTAINERS b/MAINTAINERS index fd0c65c..abe621e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -928,6 +928,10 @@ 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) diff --git a/board/raspberrypi/rpi_b/Makefile b/board/raspberrypi/rpi_b/Makefile new file mode 100644 index 0000000..9d0c377 --- /dev/null +++ b/board/raspberrypi/rpi_b/Makefile @@ -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 + +######################################################################### diff --git a/board/raspberrypi/rpi_b/rpi_b.c b/board/raspberrypi/rpi_b/rpi_b.c new file mode 100644 index 0000000..688b0aa --- /dev/null +++ b/board/raspberrypi/rpi_b/rpi_b.c @@ -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; +} diff --git a/boards.cfg b/boards.cfg index 2d36d83..7a88eb9 100644 --- a/boards.cfg +++ b/boards.cfg @@ -48,6 +48,7 @@ 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 diff --git a/include/configs/rpi_b.h b/include/configs/rpi_b.h new file mode 100644 index 0000000..cf62e45 --- /dev/null +++ b/include/configs/rpi_b.h @@ -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