gpio-nomadik.h

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/*
 * Structures and registers for GPIO access in the Nomadik SoC
 *
 * Copyright (C) 2008 STMicroelectronics
 *     Author: Prafulla WADASKAR <[email protected]>
 * Copyright (C) 2009 Alessandro Rubini <[email protected]>
 *
 * 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 __PLAT_NOMADIK_GPIO
#define __PLAT_NOMADIK_GPIO

/*
 * "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_LOWEMI 0x28

#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)

#define NMK_GPIO_ALT_CX_SHIFT 2
#define NMK_GPIO_ALT_C1 ((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
#define NMK_GPIO_ALT_C2 ((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
#define NMK_GPIO_ALT_C3 ((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
#define NMK_GPIO_ALT_C4 ((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)

/* 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);
#ifdef CONFIG_PINCTRL_NOMADIK
extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
#else
static inline int nmk_gpio_set_mode(int gpio, int gpio_mode)
{
    return -ENODEV;
}
#endif
extern int nmk_gpio_get_mode(int gpio);

extern void nmk_gpio_wakeups_suspend(void);
extern void nmk_gpio_wakeups_resume(void);

extern void nmk_gpio_clocks_enable(void);
extern void nmk_gpio_clocks_disable(void);

extern void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up);

/*
 * 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;
    int num_gpio;
    u32 (*get_secondary_status)(unsigned int bank);
    void (*set_ioforce)(bool enable);
    bool supports_sleepmode;
};

#endif /* __PLAT_NOMADIK_GPIO */