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/*
* linux/arch/unicore32/kernel/gpio.c
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
* Copyright (C) 2001-2010 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/* in FPGA, no GPIO support */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/gpio/driver.h>
/* FIXME: needed for gpio_set_value() - convert to use descriptors or hogs */
#include <linux/gpio.h>
#include <mach/hardware.h>
#ifdef CONFIG_LEDS
#include <linux/leds.h>
#include <linux/platform_device.h>
static const struct gpio_led puv3_gpio_leds[] = {
{ .name = "cpuhealth", .gpio = GPO_CPU_HEALTH, .active_low = 0,
.default_trigger = "heartbeat", },
{ .name = "hdd_led", .gpio = GPO_HDD_LED, .active_low = 1,
.default_trigger = "disk-activity", },
};
static const struct gpio_led_platform_data puv3_gpio_led_data = {
.num_leds = ARRAY_SIZE(puv3_gpio_leds),
.leds = (void *) puv3_gpio_leds,
};
static struct platform_device puv3_gpio_gpio_leds = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = (void *) &puv3_gpio_led_data,
}
};
static int __init puv3_gpio_leds_init(void)
{
platform_device_register(&puv3_gpio_gpio_leds);
return 0;
}
device_initcall(puv3_gpio_leds_init);
#endif
static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset)
{
return !!(readl(GPIO_GPLR) & GPIO_GPIO(offset));
}
static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
if (value)
writel(GPIO_GPIO(offset), GPIO_GPSR);
else
writel(GPIO_GPIO(offset), GPIO_GPCR);
}
static int puv3_direction_input(struct gpio_chip *chip, unsigned offset)
{
unsigned long flags;
local_irq_save(flags);
writel(readl(GPIO_GPDR) & ~GPIO_GPIO(offset), GPIO_GPDR);
local_irq_restore(flags);
return 0;
}
static int puv3_direction_output(struct gpio_chip *chip, unsigned offset,
int value)
{
unsigned long flags;
local_irq_save(flags);
puv3_gpio_set(chip, offset, value);
writel(readl(GPIO_GPDR) | GPIO_GPIO(offset), GPIO_GPDR);
local_irq_restore(flags);
return 0;
}
static struct gpio_chip puv3_gpio_chip = {
.label = "gpio",
.direction_input = puv3_direction_input,
.direction_output = puv3_direction_output,
.set = puv3_gpio_set,
.get = puv3_gpio_get,
.base = 0,
.ngpio = GPIO_MAX + 1,
};
void __init puv3_init_gpio(void)
{
writel(GPIO_DIR, GPIO_GPDR);
#if defined(CONFIG_PUV3_NB0916) || defined(CONFIG_PUV3_SMW0919) \
|| defined(CONFIG_PUV3_DB0913)
gpio_set_value(GPO_WIFI_EN, 1);
gpio_set_value(GPO_HDD_LED, 1);
gpio_set_value(GPO_VGA_EN, 1);
gpio_set_value(GPO_LCD_EN, 1);
gpio_set_value(GPO_CAM_PWR_EN, 0);
gpio_set_value(GPO_LCD_VCC_EN, 1);
gpio_set_value(GPO_SOFT_OFF, 1);
gpio_set_value(GPO_BT_EN, 1);
gpio_set_value(GPO_FAN_ON, 0);
gpio_set_value(GPO_SPKR, 0);
gpio_set_value(GPO_CPU_HEALTH, 1);
gpio_set_value(GPO_LAN_SEL, 1);
/*
* DO NOT modify the GPO_SET_V1 and GPO_SET_V2 in kernel
* gpio_set_value(GPO_SET_V1, 1);
* gpio_set_value(GPO_SET_V2, 1);
*/
#endif
gpiochip_add_data(&puv3_gpio_chip, NULL);
}
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