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openwrtv3/target/linux/bcm53xx/patches-3.10/0008-bcm53xx-initial-support-for-the-BCM5301-BCM470X-SoC-.patch
Hauke Mehrtens 9e9261a718 bcm53xx: add initial support for ARM based BCM47XX and BCM53XX SoCs 
This was only tested on a Netgear R6250, but it could also work on
other devices when the correct images are generated.
It is only possible to boot into a ram disk, no Ethernet, Wifi, flash,
USB is supported.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 37268
2013-07-12 13:46:27 +00:00

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From 6c55b7f2fe06eb01f4ca6dad35d54c6e2ecbff25 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sat, 29 Jun 2013 22:06:43 +0200
Subject: [PATCH 08/17] bcm53xx: initial support for the BCM5301/BCM470X SoC
with ARM CPU
This patch adds support for the BCM5301/BCM470X SoCs with an ARM CPU.
Currently just booting to a shell is working and nothing else, no
Ethernet, wifi, flash, ...
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
arch/arm/Kconfig | 2 +
arch/arm/Kconfig.debug | 5 ++
arch/arm/Makefile | 1 +
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/bcm5301-netgear-r6250.dts | 20 +++++++
arch/arm/boot/dts/bcm5301.dtsi | 83 +++++++++++++++++++++++++++
arch/arm/include/debug/bcm53xx.S | 19 ++++++
arch/arm/mach-bcm53xx/Kconfig | 15 +++++
arch/arm/mach-bcm53xx/Makefile | 1 +
arch/arm/mach-bcm53xx/bcm53xx.c | 69 ++++++++++++++++++++++
10 files changed, 216 insertions(+)
create mode 100644 arch/arm/boot/dts/bcm5301-netgear-r6250.dts
create mode 100644 arch/arm/boot/dts/bcm5301.dtsi
create mode 100644 arch/arm/include/debug/bcm53xx.S
create mode 100644 arch/arm/mach-bcm53xx/Kconfig
create mode 100644 arch/arm/mach-bcm53xx/Makefile
create mode 100644 arch/arm/mach-bcm53xx/bcm53xx.c
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -922,6 +922,8 @@ source "arch/arm/mach-bcm/Kconfig"
source "arch/arm/mach-bcm2835/Kconfig"
+source "arch/arm/mach-bcm53xx/Kconfig"
+
source "arch/arm/mach-clps711x/Kconfig"
source "arch/arm/mach-cns3xxx/Kconfig"
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -93,6 +93,10 @@ choice
bool "Kernel low-level debugging on BCM2835 PL011 UART"
depends on ARCH_BCM2835
+ config DEBUG_BCM53XX
+ bool "Kernel low-level debugging on BCM53XX UART1"
+ depends on ARCH_BCM53XX
+
config DEBUG_CLPS711X_UART1
bool "Kernel low-level debugging messages via UART1"
depends on ARCH_CLPS711X
@@ -620,6 +624,7 @@ endchoice
config DEBUG_LL_INCLUDE
string
default "debug/bcm2835.S" if DEBUG_BCM2835
+ default "debug/bcm53xx.S" if DEBUG_BCM53XX
default "debug/cns3xxx.S" if DEBUG_CNS3XXX
default "debug/exynos.S" if DEBUG_EXYNOS_UART
default "debug/highbank.S" if DEBUG_HIGHBANK_UART
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -145,6 +145,7 @@ textofs-$(CONFIG_ARCH_MSM8960) := 0x0020
machine-$(CONFIG_ARCH_AT91) += at91
machine-$(CONFIG_ARCH_BCM) += bcm
machine-$(CONFIG_ARCH_BCM2835) += bcm2835
+machine-$(CONFIG_ARCH_BCM53XX) += bcm53xx
machine-$(CONFIG_ARCH_CLPS711X) += clps711x
machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx
machine-$(CONFIG_ARCH_DAVINCI) += davinci
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -209,6 +209,7 @@ dtb-$(CONFIG_ARCH_VT8500) += vt8500-bv07
wm8650-mid.dtb \
wm8850-w70v2.dtb
dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb
+dtb-$(CONFIG_ARCH_BCM53XX) += bcm5301-netgear-r6250.dtb
targets += dtbs
targets += $(dtb-y)
--- /dev/null
+++ b/arch/arm/boot/dts/bcm5301-netgear-r6250.dts
@@ -0,0 +1,20 @@
+/*
+ * Broadcom BCM47XX / BCM53XX arm platform code.
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+/dts-v1/;
+
+/include/ "bcm5301.dtsi"
+
+/ {
+ model = "Netgear R6250 V1 (BCM4708)";
+ compatible = "netgear,r6250v1", "brcm,bcm5301";
+
+ memory {
+ reg = <0x00000000 0x08000000>;
+ };
+};
--- /dev/null
+++ b/arch/arm/boot/dts/bcm5301.dtsi
@@ -0,0 +1,83 @@
+/*
+ * Broadcom BCM47XX / BCM53XX ARM platform code.
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+/include/ "skeleton.dtsi"
+
+/ {
+ compatible = "brcm,bcm5301";
+ model = "BCM5301/BCM4707/BCM4708/BCM4709 SoC";
+ interrupt-parent = <&gic>;
+
+ chosen {
+ bootargs = "console=ttyS0,115200 earlyprintk debug vmalloc=64M";
+ };
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
+ reg = <0>;
+ };
+ cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a9";
+ reg = <1>;
+ };
+ };
+
+ clocks {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ clk_periph: periph {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <400000000>;
+ };
+ };
+
+ uart@18000300 {
+ compatible = "ns16550";
+ reg = <0x18000300 0x100>;
+ interrupts = <0 85 4>;
+ clock-frequency = <100000000>;
+ };
+
+ uart@18000400 {
+ compatible = "ns16550";
+ reg = <0x18000400 0x100>;
+ interrupts = <0 85 4>;
+ clock-frequency = <100000000>;
+ };
+
+ gic: interrupt-controller@19021000 {
+ compatible = "arm,cortex-a9-gic";
+ #interrupt-cells = <3>;
+ #address-cells = <0>;
+ interrupt-controller;
+ reg = <0x19021000 0x1000>,
+ <0x19020100 0x100>;
+ };
+
+ timer@19020200 {
+ compatible = "arm,cortex-a9-global-timer";
+ reg = <0x19020200 0x100>;
+ interrupts = <1 11 0xf04>;
+ clocks = <&clk_periph>;
+ #clock-cells = <0>;
+ };
+
+ local-timer@19020200 {
+ compatible = "arm,cortex-a9-twd-timer";
+ reg = <0x19020600 0x100>;
+ interrupts = <1 13 0xf04>;
+ };
+};
--- /dev/null
+++ b/arch/arm/include/debug/bcm53xx.S
@@ -0,0 +1,19 @@
+/*
+ * Macros used for EARLY_PRINTK, in low-level UART debug console
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#define BCM53XX_UART1_PHYS 0x18000300
+#define BCM53XX_UART1_VIRT 0xf1000300
+#define BCM53XX_UART1_SH 0
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =BCM53XX_UART1_PHYS @ MMU off, Physical
+ ldr \rv, =BCM53XX_UART1_VIRT @ MMU on, Virtual
+ .endm
+
+#define UART_SHIFT BCM53XX_UART1_SH
+#include <asm/hardware/debug-8250.S>
--- /dev/null
+++ b/arch/arm/mach-bcm53xx/Kconfig
@@ -0,0 +1,15 @@
+config ARCH_BCM53XX
+ bool "Broadcom BCM47XX / BCM53XX ARM SoC"
+ select CPU_V7
+ select ARM_GIC
+ select HAVE_ARM_SCU if SMP
+ select HAVE_ARM_TWD if LOCAL_TIMERS
+ select HAVE_SMP
+ select HAVE_CLK
+ select LOCAL_TIMERS if SMP
+ select GENERIC_TIME
+ select GENERIC_CLOCKEVENTS_BUILD
+ select GENERIC_CLOCKEVENTS
+ select ARM_GLOBAL_TIMER
+ help
+ Support for Broadcom BCM47XX and BCM53XX SoCs with ARM CPU cores.
--- /dev/null
+++ b/arch/arm/mach-bcm53xx/Makefile
@@ -0,0 +1 @@
+obj-y += bcm53xx.o
--- /dev/null
+++ b/arch/arm/mach-bcm53xx/bcm53xx.c
@@ -0,0 +1,69 @@
+/*
+ * Broadcom BCM47XX / BCM53XX ARM platform code.
+ *
+ * Copyright 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/irqchip.h>
+#include <linux/clocksource.h>
+#include <linux/clk-provider.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/smp_scu.h>
+#include <asm/signal.h>
+
+static int bcm53xx_abort_handler(unsigned long addr, unsigned int fsr,
+ struct pt_regs *regs)
+{
+ /*
+ * These happen for no good reason
+ * possibly left over from CFE
+ */
+ pr_warn("External imprecise Data abort at addr=%#lx, fsr=%#x ignored.\n",
+ addr, fsr);
+
+ /* Returning non-zero causes fault display and panic */
+ return 0;
+}
+
+static void bcm53xx_aborts_enable(void)
+{
+ /* Install our hook */
+ hook_fault_code(16 + 6, bcm53xx_abort_handler, SIGBUS, 0,
+ "imprecise external abort");
+}
+
+static void __init bcm53xx_timer_init(void)
+{
+ of_clk_init(NULL);
+ clocksource_of_init();
+}
+
+void __init bcm53xx_map_io(void)
+{
+ debug_ll_io_init();
+ bcm53xx_aborts_enable();
+}
+
+static void __init bcm53xx_dt_init(void)
+{
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char const *bcm53xx_dt_compat[] = {
+ "brcm,bcm5301",
+ "netgear,r6250v1",
+ NULL,
+};
+
+DT_MACHINE_START(BCM53XX, "BCM53XX")
+ .init_machine = bcm53xx_dt_init,
+ .map_io = bcm53xx_map_io,
+ .init_irq = irqchip_init,
+ .init_time = bcm53xx_timer_init,
+ .dt_compat = bcm53xx_dt_compat,
+MACHINE_END
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