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