From c7d1623e5820c46a39519e64fafb94f39419be82 Mon Sep 17 00:00:00 2001 From: Rod Whitby Date: Sun, 3 Feb 2008 12:05:49 +0100 Subject: [ARM] 4808/2: ixp4xx: Merge nas100d-power.c into nas100d-setup.c There is no reason to have power control in a separate file from the board setup code. Merge it back into the board setup file and remove superfluous header includes. -- Signed-off-by: Rod Whitby Signed-off-by: Russell King --- arch/arm/mach-ixp4xx/nas100d-setup.c | 90 ++++++++++++++++++++++++++++++++++-- 1 file changed, 86 insertions(+), 4 deletions(-) (limited to 'arch/arm/mach-ixp4xx/nas100d-setup.c') diff --git a/arch/arm/mach-ixp4xx/nas100d-setup.c b/arch/arm/mach-ixp4xx/nas100d-setup.c index a432226b205..4cecae84837 100644 --- a/arch/arm/mach-ixp4xx/nas100d-setup.c +++ b/arch/arm/mach-ixp4xx/nas100d-setup.c @@ -3,8 +3,14 @@ * * NAS 100d board-setup * - * based ixdp425-setup.c: + * Copyright (C) 2008 Rod Whitby + * + * based on ixdp425-setup.c: * Copyright (C) 2003-2004 MontaVista Software, Inc. + * based on nas100d-power.c: + * Copyright (C) 2005 Tower Technologies + * based on nas100d-io.c + * Copyright (C) 2004 Karen Spearel * * Author: Alessandro Zummo * Author: Rod Whitby @@ -13,10 +19,13 @@ */ #include -#include +#include +#include +#include #include #include #include +#include #include #include @@ -24,6 +33,7 @@ #include #include #include +#include static struct flash_platform_data nas100d_flash_data = { .map_name = "cfi_probe", @@ -168,6 +178,57 @@ static void nas100d_power_off(void) gpio_line_set(NAS100D_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 nas100d_power_handler(unsigned long data); +static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0); + +static void nas100d_power_handler(unsigned long data) +{ + /* This routine is called twice per second to check the + * state of the power button. + */ + + if (gpio_get_value(NAS100D_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(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW); + } else { + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + } + } + + mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); +} + +static irqreturn_t nas100d_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 nas100d_init(void) { DECLARE_MAC_BUF(mac_buf); @@ -183,8 +244,6 @@ static void __init nas100d_init(void) nas100d_flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; - pm_power_off = nas100d_power_off; - i2c_register_board_info(0, nas100d_i2c_board_info, ARRAY_SIZE(nas100d_i2c_board_info)); @@ -197,6 +256,29 @@ static void __init nas100d_init(void) platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices)); + pm_power_off = nas100d_power_off; + + if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler, + IRQF_DISABLED | IRQF_TRIGGER_LOW, + "NAS100D reset button", NULL) < 0) { + + printk(KERN_DEBUG "Reset Button IRQ %d not available\n", + gpio_to_irq(NAS100D_RB_GPIO)); + } + + /* The power button on the Iomega NAS100d is on GPIO 14, 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(NAS100D_PB_GPIO, IXP4XX_GPIO_IN); + + /* Set the initial value for the power button IRQ handler */ + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + + mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); + /* * Map in a portion of the flash and read the MAC address. * Since it is stored in BE in the flash itself, we need to -- cgit v1.2.3-70-g09d2