ARM: BCM5301X: initial support for the BCM5301X/BCM470X SoCs with ARM CPU

This patch adds support for the BCM5301X/BCM470X SoCs with an ARM CPUs.
Currently just booting to a shell is working and nothing else, no
Ethernet, wifi, flash, ...
I have some pending patches to make Ethernet work for this device.
Mostly device tree support for bcma is missing.

This SoC is used in small office and home router with Broadcom SoCs
it's internal name is Northstar. This code should support the BCM4707,
BCM4708, BCM4709, BCM53010, BCM53011 and BCM53012 SoC. It uses one or
two ARM Cortex A9 Cores, some highlights are 2 PCIe 2.0 controllers,
4 Gigabit Ethernet MACs and a USB 3.0 host controller.

This SoC uses a dual core CPU, but this is currently not implemented.
More information about this SoC can be found here:
http://www.anandtech.com/show/5925/broadcom-announces-bcm4708x-and-bcm5301x-socs-for-80211ac-routers

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christian Daudt <bcm@fixthebug.org>
Signed-off-by: Matt Porter <mporter@linaro.org>

diff --git a/Documentation/devicetree/bindings/arm/bcm4708.txt b/Documentation/devicetree/bindings/arm/bcm4708.txt
new file mode 100644 (file)
index 0000000..6b0f49f
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/bcm4708.txt
@@ -0,0 +1,8 @@
+Broadcom BCM4708 device tree bindings
+-------------------------------------------
+
+Boards with the BCM4708 SoC shall have the following properties:
+
+Required root node property:
+
+compatible = "brcm,bcm4708";

diff --git a/MAINTAINERS b/MAINTAINERS
index fb08dce..082eccd 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1880,6 +1880,14 @@ F:       arch/arm/boot/dts/bcm2835*
 F:     arch/arm/configs/bcm2835_defconfig
 F:     drivers/*/*bcm2835*
 
+BROADCOM BCM5301X ARM ARCHICTURE
+M:     Hauke Mehrtens <hauke@hauke-m.de>
+L:     linux-arm-kernel@lists.infradead.org
+S:     Maintained
+F:     arch/arm/mach-bcm/bcm_5301x.c
+F:     arch/arm/boot/dts/bcm5301x.dtsi
+F:     arch/arm/boot/dts/bcm470*
+
 BROADCOM TG3 GIGABIT ETHERNET DRIVER
 M:     Nithin Nayak Sujir <nsujir@broadcom.com>
 M:     Michael Chan <mchan@broadcom.com>

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index ee69829..1b4821b 100644 (file)
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -11,6 +11,7 @@ CONFIG_ARCH_MVEBU=y
 CONFIG_MACH_ARMADA_370=y
 CONFIG_MACH_ARMADA_XP=y
 CONFIG_ARCH_BCM=y
+CONFIG_ARCH_BCM_5301X=y
 CONFIG_ARCH_BCM_MOBILE=y
 CONFIG_ARCH_BERLIN=y
 CONFIG_MACH_BERLIN_BG2=y

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 8dd5fbf..f2a2fb9 100644 (file)
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -31,6 +31,32 @@ config ARCH_BCM_MOBILE
          BCM11130, BCM11140, BCM11351, BCM28145 and
          BCM28155 variants.
 
+config ARCH_BCM_5301X
+       bool "Broadcom BCM470X / BCM5301X ARM SoC" if ARCH_MULTI_V7
+       depends on MMU
+       select ARM_GIC
+       select CACHE_L2X0
+       select HAVE_ARM_SCU if SMP
+       select HAVE_ARM_TWD if SMP
+       select HAVE_SMP
+       select COMMON_CLK
+       select GENERIC_CLOCKEVENTS
+       select ARM_GLOBAL_TIMER
+       select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
+       select MIGHT_HAVE_PCI
+       help
+         Support for Broadcom BCM470X and BCM5301X SoCs with ARM CPU cores.
+
+         This is a network SoC line mostly used in home routers and
+         wifi access points, it's internal name is Northstar.
+         This inclused the following SoC: BCM53010, BCM53011, BCM53012,
+         BCM53014, BCM53015, BCM53016, BCM53017, BCM53018, BCM4707,
+         BCM4708 and BCM4709.
+
+         Do not confuse this with the BCM4760 which is a totally
+         different SoC or with the older BCM47XX and BCM53XX based
+         network SoC using a MIPS CPU, they are supported by arch/mips/bcm47xx
+
 endmenu
 
 endif

diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index c2ccd5a..0164913 100644 (file)
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -13,3 +13,4 @@
 obj-$(CONFIG_ARCH_BCM_MOBILE)  := board_bcm281xx.o bcm_kona_smc.o bcm_kona_smc_asm.o kona.o
 plus_sec := $(call as-instr,.arch_extension sec,+sec)
 AFLAGS_bcm_kona_smc_asm.o      :=-Wa,-march=armv7-a$(plus_sec)
+obj-$(CONFIG_ARCH_BCM_5301X)   += bcm_5301x.o

diff --git a/arch/arm/mach-bcm/bcm_5301x.c b/arch/arm/mach-bcm/bcm_5301x.c
new file mode 100644 (file)
index 0000000..ef9740a
--- /dev/null
+++ b/arch/arm/mach-bcm/bcm_5301x.c
@@ -0,0 +1,28 @@
+/*
+ * Broadcom BCM470X / BCM5301X ARM platform code.
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include <asm/mach/arch.h>
+
+
+static void __init bcm5301x_dt_init(void)
+{
+       l2x0_of_init(0, ~0UL);
+       of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char __initconst *bcm5301x_dt_compat[] = {
+       "brcm,bcm4708",
+       NULL,
+};
+
+DT_MACHINE_START(BCM5301X, "BCM5301X")
+       .init_machine   = bcm5301x_dt_init,
+       .dt_compat      = bcm5301x_dt_compat,
+MACHINE_END