release/src-rt-6.x.4708/linux/linux-2.6.36/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 struct regulator_dev;
  21 struct 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
  47 struct 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 */
  75 int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg);
  76 int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
  77                  unsigned short val);
  78 int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
  79                     unsigned short mask, unsigned short val);
  80 int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
  81                      int count, u16 *buf);
  82
  83
  84 /* Helper to save on boilerplate */
  85 static 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 }
  95 static 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
 102 int wm8994_irq_init(struct wm8994 *wm8994);
 103 void wm8994_irq_exit(struct wm8994 *wm8994);
 104
 105 #endif