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 cb636d05f4f3..ca5c15a4e626 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 7153a24c3024..055c85a1cc46 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-$(CONFIG_MACH_LSXL_DT)              += board-lsxl.o
diff --git a/arch/arm/mach-kirkwood/Makefile.boot b/arch/arm/mach-kirkwood/Makefile.boot
index c6eba8f114a9..2a576abf409b 100644
--- a/arch/arm/mach-kirkwood/Makefile.boot
+++ b/arch/arm/mach-kirkwood/Makefile.boot
@@ -9,3 +9,5 @@ dtb-$(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 87538182d3da..43142cfbb7cd 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 000000000000..83d8975592f8
--- /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 2fd03adbd711..304dd1abfdca 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);