LXR linux/include/linux/mfd/wm8994/core.h

   1/*
   2 * include/linux/mfd/wm8994/core.h -- Core interface for WM8994
   3 *
   4 * Copyright 2009 Wolfson Microelectronics PLC.
   5 *
   6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7 *
   8 *  This program is free software; you can redistribute  it and/or modify it
   9 *  under  the terms of  the GNU General  Public License as published by the
  10 *  Free Software Foundation;  either version 2 of the  License, or (at your
  11 *  option) any later version.
  12 *
  13 */
  14
  15#ifndef __MFD_WM8994_CORE_H__
  16#define __MFD_WM8994_CORE_H__
  17
  18#include <linux/interrupt.h>
  19
  20struct regulator_dev;
  21struct regulator_bulk_data;
  22
  23#define WM8994_NUM_GPIO_REGS 11
  24#define WM8994_NUM_LDO_REGS   2
  25#define WM8994_NUM_IRQ_REGS   2
  26
  27#define WM8994_IRQ_TEMP_SHUT            0
  28#define WM8994_IRQ_MIC1_DET             1
  29#define WM8994_IRQ_MIC1_SHRT            2
  30#define WM8994_IRQ_MIC2_DET             3
  31#define WM8994_IRQ_MIC2_SHRT            4
  32#define WM8994_IRQ_FLL1_LOCK            5
  33#define WM8994_IRQ_FLL2_LOCK            6
  34#define WM8994_IRQ_SRC1_LOCK            7
  35#define WM8994_IRQ_SRC2_LOCK            8
  36#define WM8994_IRQ_AIF1DRC1_SIG_DET     9
  37#define WM8994_IRQ_AIF1DRC2_SIG_DET     10
  38#define WM8994_IRQ_AIF2DRC_SIG_DET      11
  39#define WM8994_IRQ_FIFOS_ERR            12
  40#define WM8994_IRQ_WSEQ_DONE            13
  41#define WM8994_IRQ_DCS_DONE             14
  42#define WM8994_IRQ_TEMP_WARN            15
  43
  44/* GPIOs in the chip are numbered from 1-11 */
  45#define WM8994_IRQ_GPIO(x) (x + WM8994_IRQ_TEMP_WARN)
  46
  47struct wm8994 {
  48        struct mutex io_lock;
  49        struct mutex irq_lock;
  50
  51        struct device *dev;
  52        int (*read_dev)(struct wm8994 *wm8994, unsigned short reg,
  53                        int bytes, void *dest);
  54        int (*write_dev)(struct wm8994 *wm8994, unsigned short reg,
  55                         int bytes, void *src);
  56
  57        void *control_data;
  58
  59        int gpio_base;
  60        int irq_base;
  61
  62        int irq;
  63        u16 irq_masks_cur[WM8994_NUM_IRQ_REGS];
  64        u16 irq_masks_cache[WM8994_NUM_IRQ_REGS];
  65
  66        /* Used over suspend/resume */
  67        u16 ldo_regs[WM8994_NUM_LDO_REGS];
  68        u16 gpio_regs[WM8994_NUM_GPIO_REGS];
  69
  70        struct regulator_dev *dbvdd;
  71        struct regulator_bulk_data *supplies;
  72};
  73
  74/* Device I/O API */
  75int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg);
  76int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
  77                 unsigned short val);
  78int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
  79                    unsigned short mask, unsigned short val);
  80int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
  81                     int count, u16 *buf);
  82
  83
  84/* Helper to save on boilerplate */
  85static inline int wm8994_request_irq(struct wm8994 *wm8994, int irq,
  86                                     irq_handler_t handler, const char *name,
  87                                     void *data)
  88{
  89        if (!wm8994->irq_base)
  90                return -EINVAL;
  91        return request_threaded_irq(wm8994->irq_base + irq, NULL, handler,
  92                                    IRQF_TRIGGER_RISING, name,
  93                                    data);
  94}
  95static inline void wm8994_free_irq(struct wm8994 *wm8994, int irq, void *data)
  96{
  97        if (!wm8994->irq_base)
  98                return;
  99        free_irq(wm8994->irq_base + irq, data);
 100}
 101
 102int wm8994_irq_init(struct wm8994 *wm8994);
 103void wm8994_irq_exit(struct wm8994 *wm8994);
 104
 105#endif
 106