1/*
  2 * linux/arch/unicore32/kernel/gpio.c
  3 *
  4 * Code specific to PKUnity SoC and UniCore ISA
  5 *
  6 *	Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
  7 *	Copyright (C) 2001-2010 Guan Xuetao
  8 *
  9 * This program is free software; you can redistribute it and/or modify
 10 * it under the terms of the GNU General Public License version 2 as
 11 * published by the Free Software Foundation.
 12 */
 13/* in FPGA, no GPIO support */
 14
 15#include <linux/init.h>
 16#include <linux/module.h>
 17#include <linux/gpio/driver.h>
 18/* FIXME: needed for gpio_set_value() - convert to use descriptors or hogs */
 19#include <linux/gpio.h>
 20#include <mach/hardware.h>
 21
 22#ifdef CONFIG_LEDS
 23#include <linux/leds.h>
 24#include <linux/platform_device.h>
 25
 26static const struct gpio_led puv3_gpio_leds[] = {
 27	{ .name = "cpuhealth", .gpio = GPO_CPU_HEALTH, .active_low = 0,
 28		.default_trigger = "heartbeat",	},
 29	{ .name = "hdd_led", .gpio = GPO_HDD_LED, .active_low = 1,
 30		.default_trigger = "disk-activity", },
 31};
 32
 33static const struct gpio_led_platform_data puv3_gpio_led_data = {
 34	.num_leds =	ARRAY_SIZE(puv3_gpio_leds),
 35	.leds =		(void *) puv3_gpio_leds,
 36};
 37
 38static struct platform_device puv3_gpio_gpio_leds = {
 39	.name =		"leds-gpio",
 40	.id =		-1,
 41	.dev = {
 42		.platform_data = (void *) &puv3_gpio_led_data,
 43	}
 44};
 45
 46static int __init puv3_gpio_leds_init(void)
 47{
 48	platform_device_register(&puv3_gpio_gpio_leds);
 49	return 0;
 50}
 51
 52device_initcall(puv3_gpio_leds_init);
 53#endif
 54
 55static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset)
 56{
 57	return !!(readl(GPIO_GPLR) & GPIO_GPIO(offset));
 58}
 59
 60static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 61{
 62	if (value)
 63		writel(GPIO_GPIO(offset), GPIO_GPSR);
 64	else
 65		writel(GPIO_GPIO(offset), GPIO_GPCR);
 66}
 67
 68static int puv3_direction_input(struct gpio_chip *chip, unsigned offset)
 69{
 70	unsigned long flags;
 71
 72	local_irq_save(flags);
 73	writel(readl(GPIO_GPDR) & ~GPIO_GPIO(offset), GPIO_GPDR);
 74	local_irq_restore(flags);
 75	return 0;
 76}
 77
 78static int puv3_direction_output(struct gpio_chip *chip, unsigned offset,
 79		int value)
 80{
 81	unsigned long flags;
 82
 83	local_irq_save(flags);
 84	puv3_gpio_set(chip, offset, value);
 85	writel(readl(GPIO_GPDR) | GPIO_GPIO(offset), GPIO_GPDR);
 86	local_irq_restore(flags);
 87	return 0;
 88}
 89
 90static struct gpio_chip puv3_gpio_chip = {
 91	.label			= "gpio",
 92	.direction_input	= puv3_direction_input,
 93	.direction_output	= puv3_direction_output,
 94	.set			= puv3_gpio_set,
 95	.get			= puv3_gpio_get,
 96	.base			= 0,
 97	.ngpio			= GPIO_MAX + 1,
 98};
 99
100void __init puv3_init_gpio(void)
101{
102	writel(GPIO_DIR, GPIO_GPDR);
103#if	defined(CONFIG_PUV3_NB0916) || defined(CONFIG_PUV3_SMW0919)	\
104	|| defined(CONFIG_PUV3_DB0913)
105	gpio_set_value(GPO_WIFI_EN, 1);
106	gpio_set_value(GPO_HDD_LED, 1);
107	gpio_set_value(GPO_VGA_EN, 1);
108	gpio_set_value(GPO_LCD_EN, 1);
109	gpio_set_value(GPO_CAM_PWR_EN, 0);
110	gpio_set_value(GPO_LCD_VCC_EN, 1);
111	gpio_set_value(GPO_SOFT_OFF, 1);
112	gpio_set_value(GPO_BT_EN, 1);
113	gpio_set_value(GPO_FAN_ON, 0);
114	gpio_set_value(GPO_SPKR, 0);
115	gpio_set_value(GPO_CPU_HEALTH, 1);
116	gpio_set_value(GPO_LAN_SEL, 1);
117/*
118 * DO NOT modify the GPO_SET_V1 and GPO_SET_V2 in kernel
119 *	gpio_set_value(GPO_SET_V1, 1);
120 *	gpio_set_value(GPO_SET_V2, 1);
121 */
122#endif
123	gpiochip_add_data(&puv3_gpio_chip, NULL);
124}