arch/arm/mach-msm/include/mach/gpio.h - kernel/msm - Gitiles

 /*
  * Copyright (C) 2007 Google, Inc.
  * Copyright (c) 2009-2012, The Linux Foundation. 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

 #define ARCH_NR_GPIOS 1024

 #include <linux/interrupt.h>
 #include <asm-generic/gpio.h>
 #include <mach/irqs.h>

 #define FIRST_BOARD_GPIO	NR_GPIO_IRQS

 extern struct irq_chip msm_gpio_irq_extn;

 /**
  * 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;
 };

 struct msm_gpio_pdata {
 	int ngpio;
 	int direct_connect_irqs;
 };

 /**
  * 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
  */
 int msm_gpios_disable(const struct msm_gpio *table, int size);

 /**
  * msm_gpios_show_resume_irq() - show the interrupts that could have triggered
  * resume
  */
 void msm_gpio_show_resume_irq(void);

 /* GPIO TLMM (Top Level Multiplexing) Definitions */

 /* GPIO TLMM: Function -- GPIO specific */

 /* GPIO TLMM: Direction */
 enum {
 	GPIO_CFG_INPUT,
 	GPIO_CFG_OUTPUT,
 };

 /* GPIO TLMM: Pullup/Pulldown */
 enum {
 	GPIO_CFG_NO_PULL,
 	GPIO_CFG_PULL_DOWN,
 	GPIO_CFG_KEEPER,
 	GPIO_CFG_PULL_UP,
 };

 /* GPIO TLMM: Drive Strength */
 enum {
 	GPIO_CFG_2MA,
 	GPIO_CFG_4MA,
 	GPIO_CFG_6MA,
 	GPIO_CFG_8MA,
 	GPIO_CFG_10MA,
 	GPIO_CFG_12MA,
 	GPIO_CFG_14MA,
 	GPIO_CFG_16MA,
 };

 enum {
 	GPIO_CFG_ENABLE,
 	GPIO_CFG_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);

 enum msm_tlmm_hdrive_tgt {
 	TLMM_HDRV_SDC4_CLK = 0,
 	TLMM_HDRV_SDC4_CMD,
 	TLMM_HDRV_SDC4_DATA,
 	TLMM_HDRV_SDC3_CLK,
 	TLMM_HDRV_SDC3_CMD,
 	TLMM_HDRV_SDC3_DATA,
 	TLMM_HDRV_SDC2_CLK,
 	TLMM_HDRV_SDC2_CMD,
 	TLMM_HDRV_SDC2_DATA,
 	TLMM_HDRV_SDC1_CLK,
 	TLMM_HDRV_SDC1_CMD,
 	TLMM_HDRV_SDC1_DATA,
 };

 enum msm_tlmm_pull_tgt {
 	TLMM_PULL_SDC4_CLK = 0,
 	TLMM_PULL_SDC4_CMD,
 	TLMM_PULL_SDC4_DATA,
 	TLMM_PULL_SDC3_CLK,
 	TLMM_PULL_SDC3_CMD,
 	TLMM_PULL_SDC3_DATA,
 	TLMM_PULL_SDC2_CLK,
 	TLMM_PULL_SDC2_CMD,
 	TLMM_PULL_SDC2_DATA,
 	TLMM_PULL_SDC1_CLK,
 	TLMM_PULL_SDC1_CMD,
 	TLMM_PULL_SDC1_DATA,
 };

 #if defined(CONFIG_GPIO_MSM_V2) || defined(CONFIG_GPIO_MSM_V3)
 void msm_tlmm_set_hdrive(enum msm_tlmm_hdrive_tgt tgt, int drv_str);
 void msm_tlmm_set_pull(enum msm_tlmm_pull_tgt tgt, int pull);

 /*
  * A GPIO can be set as a direct-connect IRQ.  This can be used to bypass
  * the normal summary-interrupt mechanism for those GPIO lines deemed to be
  * higher priority or otherwise worthy of special treatment, but resources
  * are limited: only a few DC interrupt lines are available.
  * Care must be taken when usurping a GPIO in this manner, as the summary
  * interrupt controller has no idea that the GPIO has been taken away from it.
  * Clients can still register to receive the summary interrupt assigned
  * to that GPIO, which will uninstall it as a direct connect IRQ with
  * no warning.
  *
  * The irq passed to this function is the DC IRQ number, not the
  * irq number seen by the scorpion when the interrupt triggers.  For example,
  * if 0 is specified, then when DC IRQ 0 triggers, the scorpion will see
  * interrupt TLMM_MSM_DIR_CONN_IRQ_0.
  *
  * input_polarity parameter specifies when the gpio should raise the direct
  * interrupt. A value of 0 means that it is active low, anything else means
  * active high
  *
  */
 int msm_gpio_install_direct_irq(unsigned gpio, unsigned irq,
 						unsigned int input_polarity);
 #else
 static inline void msm_tlmm_set_hdrive(enum msm_tlmm_hdrive_tgt tgt,
 				       int drv_str) {}
 static inline void msm_tlmm_set_pull(enum msm_tlmm_pull_tgt tgt, int pull) {}
 static inline int msm_gpio_install_direct_irq(unsigned gpio, unsigned irq,
 						unsigned int input_polarity)
 {
 	return -ENOSYS;
 }
 #endif

 #ifdef CONFIG_OF
 int __init msm_gpio_of_init(struct device_node *node,
 			    struct device_node *parent);
 #endif

 #endif /* __ASM_ARCH_MSM_GPIO_H */
	/*
	* Copyright (C) 2007 Google, Inc.
	* Copyright (c) 2009-2012, The Linux Foundation. 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

	#define ARCH_NR_GPIOS 1024

	#include <linux/interrupt.h>
	#include <asm-generic/gpio.h>
	#include <mach/irqs.h>

	#define FIRST_BOARD_GPIO NR_GPIO_IRQS

	extern struct irq_chip msm_gpio_irq_extn;

	/**
	* 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;
	};

	struct msm_gpio_pdata {
	int ngpio;
	int direct_connect_irqs;
	};

	/**
	* 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
	*/
	int msm_gpios_disable(const struct msm_gpio *table, int size);

	/**
	* msm_gpios_show_resume_irq() - show the interrupts that could have triggered
	* resume
	*/
	void msm_gpio_show_resume_irq(void);

	/* GPIO TLMM (Top Level Multiplexing) Definitions */

	/* GPIO TLMM: Function -- GPIO specific */

	/* GPIO TLMM: Direction */
	enum {
	GPIO_CFG_INPUT,
	GPIO_CFG_OUTPUT,
	};

	/* GPIO TLMM: Pullup/Pulldown */
	enum {
	GPIO_CFG_NO_PULL,
	GPIO_CFG_PULL_DOWN,
	GPIO_CFG_KEEPER,
	GPIO_CFG_PULL_UP,
	};

	/* GPIO TLMM: Drive Strength */
	enum {
	GPIO_CFG_2MA,
	GPIO_CFG_4MA,
	GPIO_CFG_6MA,
	GPIO_CFG_8MA,
	GPIO_CFG_10MA,
	GPIO_CFG_12MA,
	GPIO_CFG_14MA,
	GPIO_CFG_16MA,
	};

	enum {
	GPIO_CFG_ENABLE,
	GPIO_CFG_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);

	enum msm_tlmm_hdrive_tgt {
	TLMM_HDRV_SDC4_CLK = 0,
	TLMM_HDRV_SDC4_CMD,
	TLMM_HDRV_SDC4_DATA,
	TLMM_HDRV_SDC3_CLK,
	TLMM_HDRV_SDC3_CMD,
	TLMM_HDRV_SDC3_DATA,
	TLMM_HDRV_SDC2_CLK,
	TLMM_HDRV_SDC2_CMD,
	TLMM_HDRV_SDC2_DATA,
	TLMM_HDRV_SDC1_CLK,
	TLMM_HDRV_SDC1_CMD,
	TLMM_HDRV_SDC1_DATA,
	};

	enum msm_tlmm_pull_tgt {
	TLMM_PULL_SDC4_CLK = 0,
	TLMM_PULL_SDC4_CMD,
	TLMM_PULL_SDC4_DATA,
	TLMM_PULL_SDC3_CLK,
	TLMM_PULL_SDC3_CMD,
	TLMM_PULL_SDC3_DATA,
	TLMM_PULL_SDC2_CLK,
	TLMM_PULL_SDC2_CMD,
	TLMM_PULL_SDC2_DATA,
	TLMM_PULL_SDC1_CLK,
	TLMM_PULL_SDC1_CMD,
	TLMM_PULL_SDC1_DATA,
	};

	#if defined(CONFIG_GPIO_MSM_V2) \|\| defined(CONFIG_GPIO_MSM_V3)
	void msm_tlmm_set_hdrive(enum msm_tlmm_hdrive_tgt tgt, int drv_str);
	void msm_tlmm_set_pull(enum msm_tlmm_pull_tgt tgt, int pull);

	/*
	* A GPIO can be set as a direct-connect IRQ. This can be used to bypass
	* the normal summary-interrupt mechanism for those GPIO lines deemed to be
	* higher priority or otherwise worthy of special treatment, but resources
	* are limited: only a few DC interrupt lines are available.
	* Care must be taken when usurping a GPIO in this manner, as the summary
	* interrupt controller has no idea that the GPIO has been taken away from it.
	* Clients can still register to receive the summary interrupt assigned
	* to that GPIO, which will uninstall it as a direct connect IRQ with
	* no warning.
	*
	* The irq passed to this function is the DC IRQ number, not the
	* irq number seen by the scorpion when the interrupt triggers. For example,
	* if 0 is specified, then when DC IRQ 0 triggers, the scorpion will see
	* interrupt TLMM_MSM_DIR_CONN_IRQ_0.
	*
	* input_polarity parameter specifies when the gpio should raise the direct
	* interrupt. A value of 0 means that it is active low, anything else means
	* active high
	*
	*/
	int msm_gpio_install_direct_irq(unsigned gpio, unsigned irq,
	unsigned int input_polarity);
	#else
	static inline void msm_tlmm_set_hdrive(enum msm_tlmm_hdrive_tgt tgt,
	int drv_str) {}
	static inline void msm_tlmm_set_pull(enum msm_tlmm_pull_tgt tgt, int pull) {}
	static inline int msm_gpio_install_direct_irq(unsigned gpio, unsigned irq,
	unsigned int input_polarity)
	{
	return -ENOSYS;
	}
	#endif

	#ifdef CONFIG_OF
	int __init msm_gpio_of_init(struct device_node *node,
	struct device_node *parent);
	#endif

	#endif /* __ASM_ARCH_MSM_GPIO_H */