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/*
* Structures and registers for GPIO access in the Nomadik SoC
*
* Copyright (C) 2008 STMicroelectronics
* Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
* Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
*
* 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.
*/
#ifndef __ASM_PLAT_GPIO_H
#define __ASM_PLAT_GPIO_H
#include <asm-generic/gpio.h>
/*
* These currently cause a function call to happen, they may be optimized
* if needed by adding cpu-specific defines to identify blocks
* (see mach-pxa/include/mach/gpio.h as an example using GPLR etc)
*/
#define gpio_get_value __gpio_get_value
#define gpio_set_value __gpio_set_value
#define gpio_cansleep __gpio_cansleep
#define gpio_to_irq __gpio_to_irq
/*
* "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
* the "gpio" namespace for generic and cross-machine functions
*/
/* Register in the logic block */
#define NMK_GPIO_DAT 0x00
#define NMK_GPIO_DATS 0x04
#define NMK_GPIO_DATC 0x08
#define NMK_GPIO_PDIS 0x0c
#define NMK_GPIO_DIR 0x10
#define NMK_GPIO_DIRS 0x14
#define NMK_GPIO_DIRC 0x18
#define NMK_GPIO_SLPC 0x1c
#define NMK_GPIO_AFSLA 0x20
#define NMK_GPIO_AFSLB 0x24
#define NMK_GPIO_RIMSC 0x40
#define NMK_GPIO_FIMSC 0x44
#define NMK_GPIO_IS 0x48
#define NMK_GPIO_IC 0x4c
#define NMK_GPIO_RWIMSC 0x50
#define NMK_GPIO_FWIMSC 0x54
#define NMK_GPIO_WKS 0x58
/* Alternate functions: function C is set in hw by setting both A and B */
#define NMK_GPIO_ALT_GPIO 0
#define NMK_GPIO_ALT_A 1
#define NMK_GPIO_ALT_B 2
#define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
/* Pull up/down values */
enum nmk_gpio_pull {
NMK_GPIO_PULL_NONE,
NMK_GPIO_PULL_UP,
NMK_GPIO_PULL_DOWN,
};
/* Sleep mode */
enum nmk_gpio_slpm {
NMK_GPIO_SLPM_INPUT,
NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
NMK_GPIO_SLPM_NOCHANGE,
NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
};
extern int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode);
extern int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull);
extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
extern int nmk_gpio_get_mode(int gpio);
/*
* Platform data to register a block: only the initial gpio/irq number.
*/
struct nmk_gpio_platform_data {
char *name;
int first_gpio;
int first_irq;
};
#endif /* __ASM_PLAT_GPIO_H */
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