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										 |  |  | /*
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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 */ | 
					
						
							|  |  |  | 
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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[] = { | 
					
						
							|  |  |  | 	{ .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", }, | 
					
						
							|  |  |  | }; | 
					
						
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							|  |  |  | static const struct gpio_led_platform_data puv3_gpio_led_data = { | 
					
						
							|  |  |  | 	.num_leds =	ARRAY_SIZE(puv3_gpio_leds), | 
					
						
							|  |  |  | 	.leds =		(void *) puv3_gpio_leds, | 
					
						
							|  |  |  | }; | 
					
						
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							|  |  |  | static struct platform_device puv3_gpio_gpio_leds = { | 
					
						
							|  |  |  | 	.name =		"leds-gpio", | 
					
						
							|  |  |  | 	.id =		-1, | 
					
						
							|  |  |  | 	.dev = { | 
					
						
							|  |  |  | 		.platform_data = (void *) &puv3_gpio_led_data, | 
					
						
							|  |  |  | 	} | 
					
						
							|  |  |  | }; | 
					
						
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							|  |  |  | static int __init puv3_gpio_leds_init(void) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  | 	platform_device_register(&puv3_gpio_gpio_leds); | 
					
						
							|  |  |  | 	return 0; | 
					
						
							|  |  |  | } | 
					
						
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							|  |  |  | device_initcall(puv3_gpio_leds_init); | 
					
						
							|  |  |  | #endif
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							|  |  |  | static int puv3_gpio_get(struct gpio_chip *chip, unsigned offset) | 
					
						
							|  |  |  | { | 
					
						
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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) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  | 	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) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  | 	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); | 
					
						
							|  |  |  | 	return 0; | 
					
						
							|  |  |  | } | 
					
						
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							|  |  |  | static int puv3_direction_output(struct gpio_chip *chip, unsigned offset, | 
					
						
							|  |  |  | 		int value) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  | 	unsigned long flags; | 
					
						
							|  |  |  | 
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							|  |  |  | 	local_irq_save(flags); | 
					
						
							|  |  |  | 	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); | 
					
						
							|  |  |  | 	return 0; | 
					
						
							|  |  |  | } | 
					
						
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							|  |  |  | 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, | 
					
						
							|  |  |  | }; | 
					
						
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							|  |  |  | void __init puv3_init_gpio(void) | 
					
						
							|  |  |  | { | 
					
						
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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) | 
					
						
							|  |  |  | 	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); | 
					
						
							|  |  |  | /*
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							|  |  |  |  * 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
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							|  |  |  | 	gpiochip_add(&puv3_gpio_chip); | 
					
						
							|  |  |  | } |