235 lines
8.1 KiB
C
235 lines
8.1 KiB
C
/* linux/arch/arm/plat-s3c/include/plat/gpio-cfg-helper.h
|
|
*
|
|
* Copyright 2008 Openmoko, Inc.
|
|
* Copyright 2008 Simtec Electronics
|
|
* http://armlinux.simtec.co.uk/
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* S3C Platform - GPIO pin configuration helper definitions
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* This is meant for core cpu support, machine or other driver files
|
|
* should not be including this header.
|
|
*/
|
|
|
|
#ifndef __PLAT_GPIO_CFG_HELPERS_H
|
|
#define __PLAT_GPIO_CFG_HELPERS_H __FILE__
|
|
|
|
/* As a note, all gpio configuration functions are entered exclusively, either
|
|
* with the relevant lock held or the system prevented from doing anything else
|
|
* by disabling interrupts.
|
|
*/
|
|
|
|
static inline int s3c_gpio_do_setcfg(struct s3c_gpio_chip *chip,
|
|
unsigned int off, unsigned int config)
|
|
{
|
|
return (chip->config->set_config)(chip, off, config);
|
|
}
|
|
|
|
static inline unsigned s3c_gpio_do_getcfg(struct s3c_gpio_chip *chip,
|
|
unsigned int off)
|
|
{
|
|
return (chip->config->get_config)(chip, off);
|
|
}
|
|
|
|
static inline int s3c_gpio_do_setpull(struct s3c_gpio_chip *chip,
|
|
unsigned int off, s3c_gpio_pull_t pull)
|
|
{
|
|
return (chip->config->set_pull)(chip, off, pull);
|
|
}
|
|
|
|
/**
|
|
* s3c_gpio_setcfg_s3c24xx - S3C24XX style GPIO configuration.
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
* @cfg: The configuration value to set.
|
|
*
|
|
* This helper deal with the GPIO cases where the control register
|
|
* has two bits of configuration per gpio, which have the following
|
|
* functions:
|
|
* 00 = input
|
|
* 01 = output
|
|
* 1x = special function
|
|
*/
|
|
extern int s3c_gpio_setcfg_s3c24xx(struct s3c_gpio_chip *chip,
|
|
unsigned int off, unsigned int cfg);
|
|
|
|
/**
|
|
* s3c_gpio_getcfg_s3c24xx - S3C24XX style GPIO configuration read.
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
*
|
|
* The reverse of s3c_gpio_setcfg_s3c24xx(). Will return a value whicg
|
|
* could be directly passed back to s3c_gpio_setcfg_s3c24xx(), from the
|
|
* S3C_GPIO_SPECIAL() macro.
|
|
*/
|
|
unsigned int s3c_gpio_getcfg_s3c24xx(struct s3c_gpio_chip *chip,
|
|
unsigned int off);
|
|
|
|
/**
|
|
* s3c_gpio_setcfg_s3c24xx_a - S3C24XX style GPIO configuration (Bank A)
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
* @cfg: The configuration value to set.
|
|
*
|
|
* This helper deal with the GPIO cases where the control register
|
|
* has one bit of configuration for the gpio, where setting the bit
|
|
* means the pin is in special function mode and unset means output.
|
|
*/
|
|
extern int s3c_gpio_setcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
|
|
unsigned int off, unsigned int cfg);
|
|
|
|
|
|
/**
|
|
* s3c_gpio_getcfg_s3c24xx_a - S3C24XX style GPIO configuration read (Bank A)
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
*
|
|
* The reverse of s3c_gpio_setcfg_s3c24xx_a() turning an GPIO into a usable
|
|
* GPIO configuration value.
|
|
*
|
|
* @sa s3c_gpio_getcfg_s3c24xx
|
|
* @sa s3c_gpio_getcfg_s3c64xx_4bit
|
|
*/
|
|
extern unsigned s3c_gpio_getcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
|
|
unsigned int off);
|
|
|
|
/**
|
|
* s3c_gpio_setcfg_s3c64xx_4bit - S3C64XX 4bit single register GPIO config.
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
* @cfg: The configuration value to set.
|
|
*
|
|
* This helper deal with the GPIO cases where the control register has 4 bits
|
|
* of control per GPIO, generally in the form of:
|
|
* 0000 = Input
|
|
* 0001 = Output
|
|
* others = Special functions (dependant on bank)
|
|
*
|
|
* Note, since the code to deal with the case where there are two control
|
|
* registers instead of one, we do not have a separate set of functions for
|
|
* each case.
|
|
*/
|
|
extern int s3c_gpio_setcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
|
|
unsigned int off, unsigned int cfg);
|
|
|
|
|
|
/**
|
|
* s3c_gpio_getcfg_s3c64xx_4bit - S3C64XX 4bit single register GPIO config read.
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
*
|
|
* The reverse of s3c_gpio_setcfg_s3c64xx_4bit(), turning a gpio configuration
|
|
* register setting into a value the software can use, such as could be passed
|
|
* to s3c_gpio_setcfg_s3c64xx_4bit().
|
|
*
|
|
* @sa s3c_gpio_getcfg_s3c24xx
|
|
*/
|
|
extern unsigned s3c_gpio_getcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
|
|
unsigned int off);
|
|
|
|
/* Pull-{up,down} resistor controls.
|
|
*
|
|
* S3C2410,S3C2440,S3C24A0 = Pull-UP,
|
|
* S3C2412,S3C2413 = Pull-Down
|
|
* S3C6400,S3C6410 = Pull-Both [None,Down,Up,Undef]
|
|
* S3C2443 = Pull-Both [not same as S3C6400]
|
|
*/
|
|
|
|
/**
|
|
* s3c_gpio_setpull_1up() - Pull configuration for choice of up or none.
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
* @param: pull: The pull mode being requested.
|
|
*
|
|
* This is a helper function for the case where we have GPIOs with one
|
|
* bit configuring the presence of a pull-up resistor.
|
|
*/
|
|
extern int s3c_gpio_setpull_1up(struct s3c_gpio_chip *chip,
|
|
unsigned int off, s3c_gpio_pull_t pull);
|
|
|
|
/**
|
|
* s3c_gpio_setpull_1down() - Pull configuration for choice of down or none
|
|
* @chip: The gpio chip that is being configured
|
|
* @off: The offset for the GPIO being configured
|
|
* @param: pull: The pull mode being requested
|
|
*
|
|
* This is a helper function for the case where we have GPIOs with one
|
|
* bit configuring the presence of a pull-down resistor.
|
|
*/
|
|
extern int s3c_gpio_setpull_1down(struct s3c_gpio_chip *chip,
|
|
unsigned int off, s3c_gpio_pull_t pull);
|
|
|
|
/**
|
|
* s3c_gpio_setpull_upown() - Pull configuration for choice of up, down or none
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
* @param: pull: The pull mode being requested.
|
|
*
|
|
* This is a helper function for the case where we have GPIOs with two
|
|
* bits configuring the presence of a pull resistor, in the following
|
|
* order:
|
|
* 00 = No pull resistor connected
|
|
* 01 = Pull-up resistor connected
|
|
* 10 = Pull-down resistor connected
|
|
*/
|
|
extern int s3c_gpio_setpull_updown(struct s3c_gpio_chip *chip,
|
|
unsigned int off, s3c_gpio_pull_t pull);
|
|
|
|
|
|
/**
|
|
* s3c_gpio_getpull_updown() - Get configuration for choice of up, down or none
|
|
* @chip: The gpio chip that the GPIO pin belongs to
|
|
* @off: The offset to the pin to get the configuration of.
|
|
*
|
|
* This helper function reads the state of the pull-{up,down} resistor for the
|
|
* given GPIO in the same case as s3c_gpio_setpull_upown.
|
|
*/
|
|
extern s3c_gpio_pull_t s3c_gpio_getpull_updown(struct s3c_gpio_chip *chip,
|
|
unsigned int off);
|
|
|
|
/**
|
|
* s3c_gpio_getpull_1up() - Get configuration for choice of up or none
|
|
* @chip: The gpio chip that the GPIO pin belongs to
|
|
* @off: The offset to the pin to get the configuration of.
|
|
*
|
|
* This helper function reads the state of the pull-up resistor for the
|
|
* given GPIO in the same case as s3c_gpio_setpull_1up.
|
|
*/
|
|
extern s3c_gpio_pull_t s3c_gpio_getpull_1up(struct s3c_gpio_chip *chip,
|
|
unsigned int off);
|
|
|
|
/**
|
|
* s3c_gpio_setpull_s3c2443() - Pull configuration for s3c2443.
|
|
* @chip: The gpio chip that is being configured.
|
|
* @off: The offset for the GPIO being configured.
|
|
* @param: pull: The pull mode being requested.
|
|
*
|
|
* This is a helper function for the case where we have GPIOs with two
|
|
* bits configuring the presence of a pull resistor, in the following
|
|
* order:
|
|
* 00 = Pull-up resistor connected
|
|
* 10 = Pull-down resistor connected
|
|
* x1 = No pull up resistor
|
|
*/
|
|
extern int s3c_gpio_setpull_s3c2443(struct s3c_gpio_chip *chip,
|
|
unsigned int off, s3c_gpio_pull_t pull);
|
|
|
|
/**
|
|
* s3c_gpio_getpull_s3c2443() - Get configuration for s3c2443 pull resistors
|
|
* @chip: The gpio chip that the GPIO pin belongs to.
|
|
* @off: The offset to the pin to get the configuration of.
|
|
*
|
|
* This helper function reads the state of the pull-{up,down} resistor for the
|
|
* given GPIO in the same case as s3c_gpio_setpull_upown.
|
|
*/
|
|
extern s3c_gpio_pull_t s3c_gpio_getpull_s3c24xx(struct s3c_gpio_chip *chip,
|
|
unsigned int off);
|
|
|
|
#endif /* __PLAT_GPIO_CFG_HELPERS_H */
|
|
|