ARM: kirkwood: Add LS-XHL and LS-CHLv2 support

Add support for Buffalo Linkstation LS-XHL and LS-CHLv2 using the device
tree where possible.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>

6 files changed, 156 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/Kconfig b/arch/arm/mach-kirkwood/Kconfig
index cb636d05f4f..ca5c15a4e62 100644
--- a/arch/arm/mach-kirkwood/Kconfig
+++ b/arch/arm/mach-kirkwood/Kconfig
@@ -101,6 +101,14 @@ config MACH_GOFLEXNET_DT
 	  Say 'Y' here if you want your kernel to support the
 	  Seagate GoFlex Net (Flattened Device Tree).
 
+config MACH_LSXL_DT
+	bool "Buffalo Linkstation LS-XHL, LS-CHLv2 (Flattened Device Tree)"
+	select ARCH_KIRKWOOD_DT
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Buffalo Linkstation LS-XHL & LS-CHLv2 devices, using
+	  Flattened Device Tree.
+
 config MACH_TS219
 	bool "QNAP TS-110, TS-119, TS-119P+, TS-210, TS-219, TS-219P and TS-219P+ Turbo NAS"
 	help
diff --git a/arch/arm/mach-kirkwood/Makefile b/arch/arm/mach-kirkwood/Makefile
index 7153a24c302..055c85a1cc4 100644
--- a/arch/arm/mach-kirkwood/Makefile
+++ b/arch/arm/mach-kirkwood/Makefile
@@ -27,3 +27,4 @@ obj-$(CONFIG_MACH_DLINK_KIRKWOOD_DT)	+= board-dnskw.o
 obj-$(CONFIG_MACH_IB62X0_DT)		+= board-ib62x0.o
 obj-$(CONFIG_MACH_TS219_DT)		+= board-ts219.o tsx1x-common.o
 obj-$(CONFIG_MACH_GOFLEXNET_DT)		+= board-goflexnet.o
+obj-$(CONFIG_MACH_LSXL_DT)		+= board-lsxl.o
diff --git a/arch/arm/mach-kirkwood/Makefile.boot b/arch/arm/mach-kirkwood/Makefile.boot
index c6eba8f114a..2a576abf409 100644
--- a/arch/arm/mach-kirkwood/Makefile.boot
+++ b/arch/arm/mach-kirkwood/Makefile.boot
@@ -9,3 +9,5 @@ dtb-$(CONFIG_MACH_ICONNECT_DT) += kirkwood-iconnect.dtb
 dtb-$(CONFIG_MACH_IB62X0_DT) += kirkwood-ib62x0.dtb
 dtb-$(CONFIG_MACH_TS219_DT)	+= kirkwood-qnap-ts219.dtb
 dtb-$(CONFIG_MACH_GOFLEXNET_DT) += kirkwood-goflexnet.dtb
+dbt-$(CONFIG_MACH_LSXL_DT) += kirkwood-lschlv2.dtb
+dbt-$(CONFIG_MACH_LSXL_DT) += kirkwood-lsxhl.dtb
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c
index 87538182d3d..43142cfbb7c 100644
--- a/arch/arm/mach-kirkwood/board-dt.c
+++ b/arch/arm/mach-kirkwood/board-dt.c
@@ -84,6 +84,9 @@ static void __init kirkwood_dt_init(void)
 	if (of_machine_is_compatible("seagate,goflexnet"))
 		goflexnet_init();
 
+	if (of_machine_is_compatible("buffalo,lsxl"))
+		lsxl_init();
+
 	of_platform_populate(NULL, kirkwood_dt_match_table,
 			     kirkwood_auxdata_lookup, NULL);
 }
@@ -96,6 +99,7 @@ static const char *kirkwood_dt_board_compat[] = {
 	"raidsonic,ib-nas62x0",
 	"qnap,ts219",
 	"seagate,goflexnet",
+	"buffalo,lsxl",
 	NULL
 };
 
diff --git a/arch/arm/mach-kirkwood/board-lsxl.c b/arch/arm/mach-kirkwood/board-lsxl.c
new file mode 100644
index 00000000000..83d8975592f
--- /dev/null
+++ b/arch/arm/mach-kirkwood/board-lsxl.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2012 (C), Michael Walle <michael@walle.cc>
+ *
+ * arch/arm/mach-kirkwood/board-lsxl.c
+ *
+ * Buffalo Linkstation LS-XHL and LS-CHLv2 init for drivers not
+ * converted to flattened device tree yet.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/ata_platform.h>
+#include <linux/spi/flash.h>
+#include <linux/spi/spi.h>
+#include <linux/mv643xx_eth.h>
+#include <linux/gpio.h>
+#include <linux/gpio-fan.h>
+#include <linux/input.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/kirkwood.h>
+#include "common.h"
+#include "mpp.h"
+
+static struct mv643xx_eth_platform_data lsxl_ge00_data = {
+	.phy_addr	= MV643XX_ETH_PHY_ADDR(0),
+};
+
+static struct mv643xx_eth_platform_data lsxl_ge01_data = {
+	.phy_addr	= MV643XX_ETH_PHY_ADDR(8),
+};
+
+static unsigned int lsxl_mpp_config[] __initdata = {
+	MPP10_GPO,	/* HDD Power Enable */
+	MPP11_GPIO,	/* USB Vbus Enable */
+	MPP18_GPO,	/* FAN High Enable# */
+	MPP19_GPO,	/* FAN Low Enable# */
+	MPP36_GPIO,	/* Function Blue LED */
+	MPP37_GPIO,	/* Alarm LED */
+	MPP38_GPIO,	/* Info LED */
+	MPP39_GPIO,	/* Power LED */
+	MPP40_GPIO,	/* Fan Lock */
+	MPP41_GPIO,	/* Function Button */
+	MPP42_GPIO,	/* Power Switch */
+	MPP43_GPIO,	/* Power Auto Switch */
+	MPP48_GPIO,	/* Function Red LED */
+	0
+};
+
+#define LSXL_GPIO_FAN_HIGH	18
+#define LSXL_GPIO_FAN_LOW	19
+#define LSXL_GPIO_FAN_LOCK	40
+
+static struct gpio_fan_alarm lsxl_alarm = {
+	.gpio = LSXL_GPIO_FAN_LOCK,
+};
+
+static struct gpio_fan_speed lsxl_speeds[] = {
+	{
+		.rpm = 0,
+		.ctrl_val = 3,
+	}, {
+		.rpm = 1500,
+		.ctrl_val = 1,
+	}, {
+		.rpm = 3250,
+		.ctrl_val = 2,
+	}, {
+		.rpm = 5000,
+		.ctrl_val = 0,
+	}
+};
+
+static int lsxl_gpio_list[] = {
+	LSXL_GPIO_FAN_HIGH, LSXL_GPIO_FAN_LOW,
+};
+
+static struct gpio_fan_platform_data lsxl_fan_data = {
+	.num_ctrl = ARRAY_SIZE(lsxl_gpio_list),
+	.ctrl = lsxl_gpio_list,
+	.alarm = &lsxl_alarm,
+	.num_speed = ARRAY_SIZE(lsxl_speeds),
+	.speed = lsxl_speeds,
+};
+
+static struct platform_device lsxl_fan_device = {
+	.name = "gpio-fan",
+	.id = -1,
+	.num_resources = 0,
+	.dev = {
+		.platform_data = &lsxl_fan_data,
+	},
+};
+
+/*
+ * On the LS-XHL/LS-CHLv2, the shutdown process is following:
+ * - Userland monitors key events until the power switch goes to off position
+ * - The board reboots
+ * - U-boot starts and goes into an idle mode waiting for the user
+ *   to move the switch to ON position
+ *
+ */
+static void lsxl_power_off(void)
+{
+	kirkwood_restart('h', NULL);
+}
+
+#define LSXL_GPIO_HDD_POWER 10
+#define LSXL_GPIO_USB_POWER 11
+
+void __init lsxl_init(void)
+{
+	/*
+	 * Basic setup. Needs to be called early.
+	 */
+	kirkwood_mpp_conf(lsxl_mpp_config);
+
+	/* usb and sata power on */
+	gpio_set_value(LSXL_GPIO_USB_POWER, 1);
+	gpio_set_value(LSXL_GPIO_HDD_POWER, 1);
+
+	kirkwood_ehci_init();
+	kirkwood_ge00_init(&lsxl_ge00_data);
+	kirkwood_ge01_init(&lsxl_ge01_data);
+	platform_device_register(&lsxl_fan_device);
+
+	/* register power-off method */
+	pm_power_off = lsxl_power_off;
+}
diff --git a/arch/arm/mach-kirkwood/common.h b/arch/arm/mach-kirkwood/common.h
index 2fd03adbd71..304dd1abfdc 100644
--- a/arch/arm/mach-kirkwood/common.h
+++ b/arch/arm/mach-kirkwood/common.h
@@ -88,6 +88,12 @@ void goflexnet_init(void);
 static inline void goflexnet_init(void) {};
 #endif
 
+#ifdef CONFIG_MACH_LSXL_DT
+void lsxl_init(void);
+#else
+static inline void lsxl_init(void) {};
+#endif
+
 /* early init functions not converted to fdt yet */
 char *kirkwood_id(void);
 void kirkwood_l2_init(void);