/*
* DSM-G600 board-setup
*
+ * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
* Copyright (C) 2006 Tower Technologies
- * Author: Alessandro Zummo <a.zummo@towertech.it>
*
- * based ixdp425-setup.c:
+ * based on ixdp425-setup.c:
* Copyright (C) 2003-2004 MontaVista Software, Inc.
+ * based on nslu2-power.c:
+ * Copyright (C) 2005 Tower Technologies
+ * based on nslu2-io.c:
+ * Copyright (C) 2004 Karen Spearel
*
* Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Author: Michael Westerhof <mwester@dls.net>
+ * Author: Rod Whitby <rod@whitby.id.au>
* Maintainers: http://www.nslu2-linux.org/
*/
-#include <linux/kernel.h>
+#include <linux/irq.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
+#include <linux/leds.h>
+#include <linux/reboot.h>
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/time.h>
+#include <asm/gpio.h>
static struct flash_platform_data dsmg600_flash_data = {
.map_name = "cfi_probe",
.resource = &dsmg600_flash_resource,
};
-static struct ixp4xx_i2c_pins dsmg600_i2c_gpio_pins = {
+static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
.sda_pin = DSMG600_SDA_PIN,
.scl_pin = DSMG600_SCL_PIN,
};
-static struct platform_device dsmg600_i2c_controller = {
- .name = "IXP4XX-I2C",
+static struct platform_device dsmg600_i2c_gpio = {
+ .name = "i2c-gpio",
.id = 0,
- .dev.platform_data = &dsmg600_i2c_gpio_pins,
+ .dev = {
+ .platform_data = &dsmg600_i2c_gpio_data,
+ },
};
-#ifdef CONFIG_LEDS_CLASS
-static struct resource dsmg600_led_resources[] = {
+static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = {
{
- .name = "power",
- .start = DSMG600_LED_PWR_GPIO,
- .end = DSMG600_LED_PWR_GPIO,
- .flags = IXP4XX_GPIO_HIGH,
+ I2C_BOARD_INFO("rtc-pcf8563", 0x51),
},
+};
+
+static struct gpio_led dsmg600_led_pins[] = {
{
- .name = "wlan",
- .start = DSMG600_LED_WLAN_GPIO,
- .end = DSMG600_LED_WLAN_GPIO,
- .flags = IXP4XX_GPIO_LOW,
+ .name = "dsmg600:green:power",
+ .gpio = DSMG600_LED_PWR_GPIO,
},
+ {
+ .name = "dsmg600:green:wlan",
+ .gpio = DSMG600_LED_WLAN_GPIO,
+ .active_low = true,
+ },
+};
+
+static struct gpio_led_platform_data dsmg600_led_data = {
+ .num_leds = ARRAY_SIZE(dsmg600_led_pins),
+ .leds = dsmg600_led_pins,
};
static struct platform_device dsmg600_leds = {
- .name = "IXP4XX-GPIO-LED",
- .id = -1,
- .num_resources = ARRAY_SIZE(dsmg600_led_resources),
- .resource = dsmg600_led_resources,
+ .name = "leds-gpio",
+ .id = -1,
+ .dev.platform_data = &dsmg600_led_data,
};
-#endif
static struct resource dsmg600_uart_resources[] = {
{
};
static struct platform_device *dsmg600_devices[] __initdata = {
- &dsmg600_i2c_controller,
+ &dsmg600_i2c_gpio,
&dsmg600_flash,
+ &dsmg600_leds,
};
static void dsmg600_power_off(void)
gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
}
+/* This is used to make sure the power-button pusher is serious. The button
+ * must be held until the value of this counter reaches zero.
+ */
+static int power_button_countdown;
+
+/* Must hold the button down for at least this many counts to be processed */
+#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
+
+static void dsmg600_power_handler(unsigned long data);
+static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0);
+
+static void dsmg600_power_handler(unsigned long data)
+{
+ /* This routine is called twice per second to check the
+ * state of the power button.
+ */
+
+ if (gpio_get_value(DSMG600_PB_GPIO)) {
+
+ /* IO Pin is 1 (button pushed) */
+ if (power_button_countdown > 0)
+ power_button_countdown--;
+
+ } else {
+
+ /* Done on button release, to allow for auto-power-on mods. */
+ if (power_button_countdown == 0) {
+ /* Signal init to do the ctrlaltdel action,
+ * this will bypass init if it hasn't started
+ * and do a kernel_restart.
+ */
+ ctrl_alt_del();
+
+ /* Change the state of the power LED to "blink" */
+ gpio_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
+ } else {
+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
+ }
+ }
+
+ mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
+}
+
+static irqreturn_t dsmg600_reset_handler(int irq, void *dev_id)
+{
+ /* This is the paper-clip reset, it shuts the machine down directly. */
+ machine_power_off();
+
+ return IRQ_HANDLED;
+}
+
static void __init dsmg600_timer_init(void)
{
/* The xtal on this machine is non-standard. */
dsmg600_flash_resource.end =
IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
- pm_power_off = dsmg600_power_off;
+ i2c_register_board_info(0, dsmg600_i2c_board_info,
+ ARRAY_SIZE(dsmg600_i2c_board_info));
/* The UART is required on the DSM-G600 (Redboot cannot use the
* NIC) -- do it here so that it does *not* get removed if
platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
-#ifdef CONFIG_LEDS_CLASS
- /* We don't care whether or not this works. */
- (void)platform_device_register(&dsmg600_leds);
-#endif
+ pm_power_off = dsmg600_power_off;
+
+ if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
+ IRQF_DISABLED | IRQF_TRIGGER_LOW,
+ "DSM-G600 reset button", NULL) < 0) {
+
+ printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
+ gpio_to_irq(DSMG600_RB_GPIO));
+ }
+
+ /* The power button on the D-Link DSM-G600 is on GPIO 15, but
+ * it cannot handle interrupts on that GPIO line. So we'll
+ * have to poll it with a kernel timer.
+ */
+
+ /* Make sure that the power button GPIO is set up as an input */
+ gpio_line_config(DSMG600_PB_GPIO, IXP4XX_GPIO_IN);
+
+ /* Set the initial value for the power button IRQ handler */
+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
+
+ mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
}
MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
projects / linux-flexiantxendom0-3.2.10.git / blobdiff