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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | /* * 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); } |