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

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>

diff --git a/MAINTAINERS b/MAINTAINERS
index 5db80e1f8d9fefedfd5bf193d01343fd33fcb635..403b8d11d68786f8c8ac824a5d5668c3057178c8 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -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)

diff --git a/board/raspberrypi/rpi_b/Makefile b/board/raspberrypi/rpi_b/Makefile
new file mode 100644 (file)
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 (file)
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 a16c4878ba51cac35c681e7b6dd709b32c29cbc9..2c0c5964aff1c34aa8f37d99297442e6d647c90e 100644 (file)
--- a/boards.cfg
+++ b/boards.cfg
@@ -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

diff --git a/include/configs/rpi_b.h b/include/configs/rpi_b.h
new file mode 100644 (file)
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