diff options
Diffstat (limited to 'arch/unicore32/kernel/gpio.c')
-rw-r--r-- | arch/unicore32/kernel/gpio.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/arch/unicore32/kernel/gpio.c b/arch/unicore32/kernel/gpio.c new file mode 100644 index 000000000000..4cb28308bb5f --- /dev/null +++ b/arch/unicore32/kernel/gpio.c @@ -0,0 +1,122 @@ +/* + * 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 GPIO_GPLR & GPIO_GPIO(offset); +} + +static void puv3_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + if (value) + GPIO_GPSR = GPIO_GPIO(offset); + else + GPIO_GPCR = GPIO_GPIO(offset); +} + +static int puv3_direction_input(struct gpio_chip *chip, unsigned offset) +{ + unsigned long flags; + + local_irq_save(flags); + GPIO_GPDR &= ~GPIO_GPIO(offset); + 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); + GPIO_GPDR |= GPIO_GPIO(offset); + 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) +{ + GPIO_GPDR = GPIO_DIR; +#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); +} |