diff options
Diffstat (limited to 'arch/arm/mach-msm/include/mach/gpio.h')
-rw-r--r-- | arch/arm/mach-msm/include/mach/gpio.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/include/mach/gpio.h b/arch/arm/mach-msm/include/mach/gpio.h new file mode 100644 index 000000000000..713afb930d2d --- /dev/null +++ b/arch/arm/mach-msm/include/mach/gpio.h @@ -0,0 +1,167 @@ +/* linux/include/asm-arm/arch-msm/gpio.h + * + * Copyright (C) 2007 Google, Inc. + * Copyright (c) 2009, Code Aurora Forum. All rights reserved. + * Author: Mike Lockwood <lockwood@android.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __ASM_ARCH_MSM_GPIO_H +#define __ASM_ARCH_MSM_GPIO_H + +#include <linux/interrupt.h> + +/** + * struct msm_gpio - GPIO pin description + * @gpio_cfg - configuration bitmap, as per gpio_tlmm_config() + * @label - textual label + * + * Usually, GPIO's are operated by sets. + * This struct accumulate all GPIO information in single source + * and facilitete group operations provided by msm_gpios_xxx() + */ +struct msm_gpio { + u32 gpio_cfg; + const char *label; +}; + +/** + * msm_gpios_request_enable() - request and enable set of GPIOs + * + * Request and configure set of GPIO's + * In case of error, all operations rolled back. + * Return error code. + * + * @table: GPIO table + * @size: number of entries in @table + */ +int msm_gpios_request_enable(const struct msm_gpio *table, int size); +/** + * msm_gpios_disable_free() - disable and free set of GPIOs + * + * @table: GPIO table + * @size: number of entries in @table + */ +void msm_gpios_disable_free(const struct msm_gpio *table, int size); +/** + * msm_gpios_request() - request set of GPIOs + * In case of error, all operations rolled back. + * Return error code. + * + * @table: GPIO table + * @size: number of entries in @table + */ +int msm_gpios_request(const struct msm_gpio *table, int size); +/** + * msm_gpios_free() - free set of GPIOs + * + * @table: GPIO table + * @size: number of entries in @table + */ +void msm_gpios_free(const struct msm_gpio *table, int size); +/** + * msm_gpios_enable() - enable set of GPIOs + * In case of error, all operations rolled back. + * Return error code. + * + * @table: GPIO table + * @size: number of entries in @table + */ +int msm_gpios_enable(const struct msm_gpio *table, int size); +/** + * msm_gpios_disable() - disable set of GPIOs + * + * @table: GPIO table + * @size: number of entries in @table + */ +void msm_gpios_disable(const struct msm_gpio *table, int size); + +int gpio_request(unsigned gpio, const char *label); +void gpio_free(unsigned gpio); +int gpio_direction_input(unsigned gpio); +int gpio_direction_output(unsigned gpio, int value); +int gpio_get_value(unsigned gpio); +void gpio_set_value(unsigned gpio, int value); +int gpio_to_irq(unsigned gpio); + +#include <asm-generic/gpio.h> + +/* extended gpio api */ + +#define GPIOF_IRQF_MASK 0x0000ffff /* use to specify edge detection without */ +#define GPIOF_IRQF_TRIGGER_NONE 0x00010000 /* IRQF_TRIGGER_NONE is 0 which also means "as already configured" */ +#define GPIOF_INPUT 0x00020000 +#define GPIOF_DRIVE_OUTPUT 0x00040000 +#define GPIOF_OUTPUT_LOW 0x00080000 +#define GPIOF_OUTPUT_HIGH 0x00100000 + +#define GPIOIRQF_SHARED 0x00000001 /* the irq line is shared with other inputs */ + +extern int gpio_configure(unsigned int gpio, unsigned long flags); +extern int gpio_read_detect_status(unsigned int gpio); +extern int gpio_clear_detect_status(unsigned int gpio); + +/* GPIO TLMM (Top Level Multiplexing) Definitions */ + +/* GPIO TLMM: Function -- GPIO specific */ + +/* GPIO TLMM: Direction */ +enum { + GPIO_INPUT, + GPIO_OUTPUT, +}; + +/* GPIO TLMM: Pullup/Pulldown */ +enum { + GPIO_NO_PULL, + GPIO_PULL_DOWN, + GPIO_KEEPER, + GPIO_PULL_UP, +}; + +/* GPIO TLMM: Drive Strength */ +enum { + GPIO_2MA, + GPIO_4MA, + GPIO_6MA, + GPIO_8MA, + GPIO_10MA, + GPIO_12MA, + GPIO_14MA, + GPIO_16MA, +}; + +enum { + GPIO_ENABLE, + GPIO_DISABLE, +}; + +#define GPIO_CFG(gpio, func, dir, pull, drvstr) \ + ((((gpio) & 0x3FF) << 4) | \ + ((func) & 0xf) | \ + (((dir) & 0x1) << 14) | \ + (((pull) & 0x3) << 15) | \ + (((drvstr) & 0xF) << 17)) + +/** + * extract GPIO pin from bit-field used for gpio_tlmm_config + */ +#define GPIO_PIN(gpio_cfg) (((gpio_cfg) >> 4) & 0x3ff) +#define GPIO_FUNC(gpio_cfg) (((gpio_cfg) >> 0) & 0xf) +#define GPIO_DIR(gpio_cfg) (((gpio_cfg) >> 14) & 0x1) +#define GPIO_PULL(gpio_cfg) (((gpio_cfg) >> 15) & 0x3) +#define GPIO_DRVSTR(gpio_cfg) (((gpio_cfg) >> 17) & 0xf) + +int gpio_tlmm_config(unsigned config, unsigned disable); + +#endif + |