143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
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* Author: Mike Lockwood <lockwood@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __ASM_ARCH_MSM_GPIO_H
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#define __ASM_ARCH_MSM_GPIO_H
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/**
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* struct msm_gpio - GPIO pin description
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* @gpio_cfg - configuration bitmap, as per gpio_tlmm_config()
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* @label - textual label
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*
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* Usually, GPIO's are operated by sets.
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* This struct accumulate all GPIO information in single source
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* and facilitete group operations provided by msm_gpios_xxx()
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*/
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struct msm_gpio {
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u32 gpio_cfg;
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const char *label;
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};
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/**
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* msm_gpios_request_enable() - request and enable set of GPIOs
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*
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* Request and configure set of GPIO's
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* In case of error, all operations rolled back.
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* Return error code.
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*
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* @table: GPIO table
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* @size: number of entries in @table
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*/
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int msm_gpios_request_enable(const struct msm_gpio *table, int size);
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/**
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* msm_gpios_disable_free() - disable and free set of GPIOs
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*
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* @table: GPIO table
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* @size: number of entries in @table
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*/
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void msm_gpios_disable_free(const struct msm_gpio *table, int size);
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/**
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* msm_gpios_request() - request set of GPIOs
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* In case of error, all operations rolled back.
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* Return error code.
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*
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* @table: GPIO table
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* @size: number of entries in @table
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*/
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int msm_gpios_request(const struct msm_gpio *table, int size);
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/**
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* msm_gpios_free() - free set of GPIOs
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*
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* @table: GPIO table
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* @size: number of entries in @table
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*/
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void msm_gpios_free(const struct msm_gpio *table, int size);
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/**
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* msm_gpios_enable() - enable set of GPIOs
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* In case of error, all operations rolled back.
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* Return error code.
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*
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* @table: GPIO table
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* @size: number of entries in @table
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*/
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int msm_gpios_enable(const struct msm_gpio *table, int size);
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/**
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* msm_gpios_disable() - disable set of GPIOs
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*
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* @table: GPIO table
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* @size: number of entries in @table
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*/
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void msm_gpios_disable(const struct msm_gpio *table, int size);
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/* GPIO TLMM (Top Level Multiplexing) Definitions */
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/* GPIO TLMM: Function -- GPIO specific */
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/* GPIO TLMM: Direction */
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enum {
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GPIO_INPUT,
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GPIO_OUTPUT,
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};
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/* GPIO TLMM: Pullup/Pulldown */
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enum {
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GPIO_NO_PULL,
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GPIO_PULL_DOWN,
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GPIO_KEEPER,
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GPIO_PULL_UP,
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};
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/* GPIO TLMM: Drive Strength */
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enum {
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GPIO_2MA,
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GPIO_4MA,
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GPIO_6MA,
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GPIO_8MA,
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GPIO_10MA,
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GPIO_12MA,
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GPIO_14MA,
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GPIO_16MA,
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};
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enum {
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GPIO_ENABLE,
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GPIO_DISABLE,
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};
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#define GPIO_CFG(gpio, func, dir, pull, drvstr) \
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((((gpio) & 0x3FF) << 4) | \
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((func) & 0xf) | \
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(((dir) & 0x1) << 14) | \
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(((pull) & 0x3) << 15) | \
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(((drvstr) & 0xF) << 17))
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/**
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* extract GPIO pin from bit-field used for gpio_tlmm_config
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*/
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#define GPIO_PIN(gpio_cfg) (((gpio_cfg) >> 4) & 0x3ff)
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#define GPIO_FUNC(gpio_cfg) (((gpio_cfg) >> 0) & 0xf)
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#define GPIO_DIR(gpio_cfg) (((gpio_cfg) >> 14) & 0x1)
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#define GPIO_PULL(gpio_cfg) (((gpio_cfg) >> 15) & 0x3)
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#define GPIO_DRVSTR(gpio_cfg) (((gpio_cfg) >> 17) & 0xf)
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int gpio_tlmm_config(unsigned config, unsigned disable);
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#endif /* __ASM_ARCH_MSM_GPIO_H */
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