mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 16:12:02 +00:00
e5abf78b57
-- by advice of Arnd Bergmann Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*
|
|
* 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.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 = "ide-disk", },
|
|
};
|
|
|
|
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(&puv3_gpio_chip);
|
|
}
|