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
  20 enum wm8994_type {
  21         WM8994 = 0,
  22         WM8958 = 1,
  23 };
  24
  25 struct regulator_dev;
  26 struct regulator_bulk_data;
  27
  28 #define WM8994_NUM_GPIO_REGS 11
  29 #define WM8994_NUM_LDO_REGS   2
  30 #define WM8994_NUM_IRQ_REGS   2
  31
  32 #define WM8994_IRQ_TEMP_SHUT            0
  33 #define WM8994_IRQ_MIC1_DET             1
  34 #define WM8994_IRQ_MIC1_SHRT            2
  35 #define WM8994_IRQ_MIC2_DET             3
  36 #define WM8994_IRQ_MIC2_SHRT            4
  37 #define WM8994_IRQ_FLL1_LOCK            5
  38 #define WM8994_IRQ_FLL2_LOCK            6
  39 #define WM8994_IRQ_SRC1_LOCK            7
  40 #define WM8994_IRQ_SRC2_LOCK            8
  41 #define WM8994_IRQ_AIF1DRC1_SIG_DET     9
  42 #define WM8994_IRQ_AIF1DRC2_SIG_DET     10
  43 #define WM8994_IRQ_AIF2DRC_SIG_DET      11
  44 #define WM8994_IRQ_FIFOS_ERR            12
  45 #define WM8994_IRQ_WSEQ_DONE            13
  46 #define WM8994_IRQ_DCS_DONE             14
  47 #define WM8994_IRQ_TEMP_WARN            15
  48
  49 /* GPIOs in the chip are numbered from 1-11 */
  50 #define WM8994_IRQ_GPIO(x) (x + WM8994_IRQ_TEMP_WARN)
  51
  52 struct wm8994 {
  53         struct mutex io_lock;
  54         struct mutex irq_lock;
  55
  56         enum wm8994_type type;
  57
  58         struct device *dev;
  59         int (*read_dev)(struct wm8994 *wm8994, unsigned short reg,
  60                         int bytes, void *dest);
  61         int (*write_dev)(struct wm8994 *wm8994, unsigned short reg,
  62                          int bytes, const void *src);
  63
  64         void *control_data;
  65
  66         int gpio_base;
  67         int irq_base;
  68
  69         int irq;
  70         u16 irq_masks_cur[WM8994_NUM_IRQ_REGS];
  71         u16 irq_masks_cache[WM8994_NUM_IRQ_REGS];
  72
  73         /* Used over suspend/resume */
  74         bool suspended;
  75         u16 ldo_regs[WM8994_NUM_LDO_REGS];
  76         u16 gpio_regs[WM8994_NUM_GPIO_REGS];
  77
  78         struct regulator_dev *dbvdd;
  79         int num_supplies;
  80         struct regulator_bulk_data *supplies;
  81 };
  82
  83 /* Device I/O API */
  84 int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg);
  85 int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
  86                  unsigned short val);
  87 int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
  88                     unsigned short mask, unsigned short val);
  89 int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
  90                      int count, u16 *buf);
  91 int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
  92                      int count, const u16 *buf);
  93
  94
  95 /* Helper to save on boilerplate */
  96 static inline int wm8994_request_irq(struct wm8994 *wm8994, int irq,
  97                                      irq_handler_t handler, const char *name,
  98                                      void *data)
  99 {
 100         if (!wm8994->irq_base)
 101                 return -EINVAL;
 102         return request_threaded_irq(wm8994->irq_base + irq, NULL, handler,
 103                                     IRQF_TRIGGER_RISING, name,
 104                                     data);
 105 }
 106 static inline void wm8994_free_irq(struct wm8994 *wm8994, int irq, void *data)
 107 {
 108         if (!wm8994->irq_base)
 109                 return;
 110         free_irq(wm8994->irq_base + irq, data);
 111 }
 112
 113 int wm8994_irq_init(struct wm8994 *wm8994);
 114 void wm8994_irq_exit(struct wm8994 *wm8994);
 115
 116 #endif