e5abf78b57
-- by advice of Arnd Bergmann Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
122 lines
3 KiB
C
122 lines
3 KiB
C
/*
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* linux/arch/unicore32/kernel/gpio.c
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
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* Copyright (C) 2001-2010 Guan Xuetao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* in FPGA, no GPIO support */
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/gpio.h>
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#include <mach/hardware.h>
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#ifdef CONFIG_LEDS
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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static const struct gpio_led puv3_gpio_leds[] = {
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{ .name = "cpuhealth", .gpio = GPO_CPU_HEALTH, .active_low = 0,
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.default_trigger = "heartbeat", },
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{ .name = "hdd_led", .gpio = GPO_HDD_LED, .active_low = 1,
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.default_trigger = "ide-disk", },
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};
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static const struct gpio_led_platform_data puv3_gpio_led_data = {
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.num_leds = ARRAY_SIZE(puv3_gpio_leds),
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.leds = (void *) puv3_gpio_leds,
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};
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static struct platform_device puv3_gpio_gpio_leds = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = (void *) &puv3_gpio_led_data,
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}
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};
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static int __init puv3_gpio_leds_init(void)
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{
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platform_device_register(&puv3_gpio_gpio_leds);
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return 0;
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}
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device_initcall(puv3_gpio_leds_init);
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#endif
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static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset)
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{
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return readl(GPIO_GPLR) & GPIO_GPIO(offset);
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}
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static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
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{
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if (value)
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writel(GPIO_GPIO(offset), GPIO_GPSR);
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else
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writel(GPIO_GPIO(offset), GPIO_GPCR);
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}
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static int puv3_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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unsigned long flags;
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local_irq_save(flags);
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writel(readl(GPIO_GPDR) & ~GPIO_GPIO(offset), GPIO_GPDR);
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local_irq_restore(flags);
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return 0;
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}
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static int puv3_direction_output(struct gpio_chip *chip, unsigned offset,
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int value)
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{
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unsigned long flags;
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local_irq_save(flags);
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puv3_gpio_set(chip, offset, value);
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writel(readl(GPIO_GPDR) | GPIO_GPIO(offset), GPIO_GPDR);
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local_irq_restore(flags);
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return 0;
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}
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static struct gpio_chip puv3_gpio_chip = {
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.label = "gpio",
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.direction_input = puv3_direction_input,
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.direction_output = puv3_direction_output,
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.set = puv3_gpio_set,
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.get = puv3_gpio_get,
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.base = 0,
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.ngpio = GPIO_MAX + 1,
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};
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void __init puv3_init_gpio(void)
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{
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writel(GPIO_DIR, GPIO_GPDR);
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#if defined(CONFIG_PUV3_NB0916) || defined(CONFIG_PUV3_SMW0919) \
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|| defined(CONFIG_PUV3_DB0913)
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gpio_set_value(GPO_WIFI_EN, 1);
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gpio_set_value(GPO_HDD_LED, 1);
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gpio_set_value(GPO_VGA_EN, 1);
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gpio_set_value(GPO_LCD_EN, 1);
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gpio_set_value(GPO_CAM_PWR_EN, 0);
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gpio_set_value(GPO_LCD_VCC_EN, 1);
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gpio_set_value(GPO_SOFT_OFF, 1);
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gpio_set_value(GPO_BT_EN, 1);
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gpio_set_value(GPO_FAN_ON, 0);
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gpio_set_value(GPO_SPKR, 0);
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gpio_set_value(GPO_CPU_HEALTH, 1);
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gpio_set_value(GPO_LAN_SEL, 1);
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/*
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* DO NOT modify the GPO_SET_V1 and GPO_SET_V2 in kernel
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* gpio_set_value(GPO_SET_V1, 1);
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* gpio_set_value(GPO_SET_V2, 1);
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*/
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#endif
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gpiochip_add(&puv3_gpio_chip);
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}
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