core.h

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/*
 * include/linux/mfd/wm8994/core.h -- Core interface for WM8994
 *
 * Copyright 2009 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <[email protected]>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#ifndef __MFD_WM8994_CORE_H__
#define __MFD_WM8994_CORE_H__

#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/regmap.h>

enum wm8994_type {
    WM8994 = 0,
    WM8958 = 1,
    WM1811 = 2,
};

struct regulator_dev;
struct regulator_bulk_data;

#define WM8994_NUM_GPIO_REGS 11
#define WM8994_NUM_LDO_REGS   2
#define WM8994_NUM_IRQ_REGS   2

#define WM8994_IRQ_TEMP_SHUT        0
#define WM8994_IRQ_MIC1_DET     1
#define WM8994_IRQ_MIC1_SHRT        2
#define WM8994_IRQ_MIC2_DET     3
#define WM8994_IRQ_MIC2_SHRT        4
#define WM8994_IRQ_FLL1_LOCK        5
#define WM8994_IRQ_FLL2_LOCK        6
#define WM8994_IRQ_SRC1_LOCK        7
#define WM8994_IRQ_SRC2_LOCK        8
#define WM8994_IRQ_AIF1DRC1_SIG_DET 9
#define WM8994_IRQ_AIF1DRC2_SIG_DET 10
#define WM8994_IRQ_AIF2DRC_SIG_DET  11
#define WM8994_IRQ_FIFOS_ERR        12
#define WM8994_IRQ_WSEQ_DONE        13
#define WM8994_IRQ_DCS_DONE     14
#define WM8994_IRQ_TEMP_WARN        15

/* GPIOs in the chip are numbered from 1-11 */
#define WM8994_IRQ_GPIO(x) (x + WM8994_IRQ_TEMP_WARN)

struct wm8994 {
    struct mutex irq_lock;

    enum wm8994_type type;
    int revision;
    int cust_id;

    struct device *dev;
    struct regmap *regmap;

    bool ldo_ena_always_driven;

    int gpio_base;
    int irq_base;

    int irq;
    struct regmap_irq_chip_data *irq_data;

    /* Used over suspend/resume */
    bool suspended;

    struct regulator_dev *dbvdd;
    int num_supplies;
    struct regulator_bulk_data *supplies;
};

/* Device I/O API */
int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg);
int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
         unsigned short val);
int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
            unsigned short mask, unsigned short val);
int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
             int count, u16 *buf);
int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
             int count, const u16 *buf);


/* Helper to save on boilerplate */
static inline int wm8994_request_irq(struct wm8994 *wm8994, int irq,
                     irq_handler_t handler, const char *name,
                     void *data)
{
    if (!wm8994->irq_data)
        return -EINVAL;
    return request_threaded_irq(regmap_irq_get_virq(wm8994->irq_data, irq),
                    NULL, handler, IRQF_TRIGGER_RISING, name,
                    data);
}
static inline void wm8994_free_irq(struct wm8994 *wm8994, int irq, void *data)
{
    if (!wm8994->irq_data)
        return;
    free_irq(regmap_irq_get_virq(wm8994->irq_data, irq), data);
}

int wm8994_irq_init(struct wm8994 *wm8994);
void wm8994_irq_exit(struct wm8994 *wm8994);

#endif