brcm47xx: Add support for Huawei E970

This patch adds support for Huawei E970 wireless gateway devices.
It has been tested on an E970 labelled as T-Mobile web'n'walk Box IV.
E960/B970 should work too, from what I know it's basically the same hardware.

The device has a Broadcom BCM5354 SoC and a built-in 3G USB modem.

It uses a hardware watchdog which needs GPIO-7 to be toggled at least
every 1-2 seconds. This patch uses gpio_wdt module (see my previous
patch today) to take care of this.

Tested and works:  3G wan,  wlan+LED,  VLAN config,  failsafe using reset
button,   image to be used for upgrade from OEM firmware's web interface

Link to the wiki page I've created:  <http://wiki.openwrt.org/toh/huawei/e970>

Issue:

* lzma-loader crashes, so gzipped kernel is used. Presumably due to watchdog
  reset during kernel decompress.

Signed-off-by: Mathias Adam <m.adam--openwrt@adamis.de>

SVN-Revision: 38011

2 files changed, 109 insertions, 1 deletions

diff --git a/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch b/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
new file mode 100644
index 0000000..12539fd
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
@@ -0,0 +1,108 @@
+--- a/arch/mips/bcm47xx/setup.c
++++ b/arch/mips/bcm47xx/setup.c
+@@ -33,11 +33,13 @@
+ #include <linux/bcma/bcma_soc.h>
+ #include <linux/serial.h>
+ #include <linux/serial_8250.h>
++#include <linux/gpio_wdt.h>
+ #include <asm/bootinfo.h>
+ #include <asm/reboot.h>
+ #include <asm/time.h>
+ #include <bcm47xx.h>
+ #include <bcm47xx_nvram.h>
++#include <bcm47xx_board.h>
+ 
+ union bcm47xx_bus bcm47xx_bus;
+ EXPORT_SYMBOL(bcm47xx_bus);
+@@ -254,6 +256,33 @@ void __init plat_mem_setup(void)
+ 	pm_power_off = bcm47xx_machine_halt;
+ }
+ 
++static struct gpio_wdt_platform_data gpio_wdt_data;
++
++static struct platform_device gpio_wdt_device = {
++	.name			= "gpio-wdt",
++	.id			= 0,
++	.dev			= {
++		.platform_data	= &gpio_wdt_data,
++	},
++};
++
++static int __init bcm47xx_register_gpio_watchdog(void)
++{
++	enum bcm47xx_board board = bcm47xx_board_get();
++
++	switch (board) {
++	case BCM47XX_BOARD_HUAWEI_E970:
++		pr_info("bcm47xx: detected Huawei E970 or similar, starting early gpio_wdt timer\n");
++		gpio_wdt_data.gpio = 7;
++		gpio_wdt_data.interval = HZ;
++		gpio_wdt_data.first_interval = HZ / 5;
++		return platform_device_register(&gpio_wdt_device);
++	default:
++		/* Nothing to do */
++		return 0;
++	}
++}
++
+ static int __init bcm47xx_register_bus_complete(void)
+ {
+ 	switch (bcm47xx_bus_type) {
+@@ -268,6 +297,8 @@ static int __init bcm47xx_register_bus_c
+ 		break;
+ #endif
+ 	}
++	bcm47xx_register_gpio_watchdog();
++
+ 	return 0;
+ }
+ device_initcall(bcm47xx_register_bus_complete);
+--- a/arch/mips/configs/bcm47xx_defconfig
++++ b/arch/mips/configs/bcm47xx_defconfig
+@@ -379,6 +379,7 @@ CONFIG_THERMAL=y
+ CONFIG_WATCHDOG=y
+ CONFIG_WATCHDOG_NOWAYOUT=y
+ CONFIG_BCM47XX_WDT=y
++CONFIG_GPIO_WDT=y
+ CONFIG_SSB_DRIVER_GIGE=y
+ CONFIG_DISPLAY_SUPPORT=m
+ CONFIG_SOUND=m
+--- a/drivers/ssb/embedded.c
++++ b/drivers/ssb/embedded.c
+@@ -34,11 +34,36 @@ int ssb_watchdog_timer_set(struct ssb_bu
+ }
+ EXPORT_SYMBOL(ssb_watchdog_timer_set);
+ 
++#ifdef CONFIG_BCM47XX
++#include <bcm47xx_board.h>
++
++static bool ssb_watchdog_supported(void)
++{
++	enum bcm47xx_board board = bcm47xx_board_get();
++
++	/* The Huawei E970 has a hardware watchdog using a GPIO */
++	switch (board) {
++	case BCM47XX_BOARD_HUAWEI_E970:
++		return false;
++	default:
++		return true;
++	}
++}
++#else
++static bool ssb_watchdog_supported(void)
++{
++	return true;
++}
++#endif
++
+ int ssb_watchdog_register(struct ssb_bus *bus)
+ {
+ 	struct bcm47xx_wdt wdt = {};
+ 	struct platform_device *pdev;
+ 
++	if (!ssb_watchdog_supported())
++		return 0;
++
+ 	if (ssb_chipco_available(&bus->chipco)) {
+ 		wdt.driver_data = &bus->chipco;
+ 		wdt.timer_set = ssb_chipco_watchdog_timer_set_wdt;
diff --git a/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch b/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
index 4550676..f30a4fb 100644
--- a/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
+++ b/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
@@ -1,6 +1,6 @@
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -120,6 +120,10 @@ static int bcm47xx_get_invariants(struct
+@@ -122,6 +122,10 @@ static int bcm47xx_get_invariants(struct
  	if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
  		iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);