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/*
* Copyright (C) 2007 Google, Inc.
* Copyright (c) 2009-2013, 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
/**
* 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,
TLMM_PULL_SDC1_RCLK,
};
#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
#endif /* __ASM_ARCH_MSM_GPIO_H */
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