linux/drivers/mfd/wm8994-irq.c
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   1/*
   2 * wm8994-irq.c  --  Interrupt controller support for Wolfson WM8994
   3 *
   4 * Copyright 2010 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#include <linux/kernel.h>
  16#include <linux/module.h>
  17#include <linux/i2c.h>
  18#include <linux/irq.h>
  19#include <linux/mfd/core.h>
  20#include <linux/interrupt.h>
  21#include <linux/regmap.h>
  22
  23#include <linux/mfd/wm8994/core.h>
  24#include <linux/mfd/wm8994/pdata.h>
  25#include <linux/mfd/wm8994/registers.h>
  26
  27#include <linux/delay.h>
  28
  29static struct regmap_irq wm8994_irqs[] = {
  30        [WM8994_IRQ_TEMP_SHUT] = {
  31                .reg_offset = 1,
  32                .mask = WM8994_TEMP_SHUT_EINT,
  33        },
  34        [WM8994_IRQ_MIC1_DET] = {
  35                .reg_offset = 1,
  36                .mask = WM8994_MIC1_DET_EINT,
  37        },
  38        [WM8994_IRQ_MIC1_SHRT] = {
  39                .reg_offset = 1,
  40                .mask = WM8994_MIC1_SHRT_EINT,
  41        },
  42        [WM8994_IRQ_MIC2_DET] = {
  43                .reg_offset = 1,
  44                .mask = WM8994_MIC2_DET_EINT,
  45        },
  46        [WM8994_IRQ_MIC2_SHRT] = {
  47                .reg_offset = 1,
  48                .mask = WM8994_MIC2_SHRT_EINT,
  49        },
  50        [WM8994_IRQ_FLL1_LOCK] = {
  51                .reg_offset = 1,
  52                .mask = WM8994_FLL1_LOCK_EINT,
  53        },
  54        [WM8994_IRQ_FLL2_LOCK] = {
  55                .reg_offset = 1,
  56                .mask = WM8994_FLL2_LOCK_EINT,
  57        },
  58        [WM8994_IRQ_SRC1_LOCK] = {
  59                .reg_offset = 1,
  60                .mask = WM8994_SRC1_LOCK_EINT,
  61        },
  62        [WM8994_IRQ_SRC2_LOCK] = {
  63                .reg_offset = 1,
  64                .mask = WM8994_SRC2_LOCK_EINT,
  65        },
  66        [WM8994_IRQ_AIF1DRC1_SIG_DET] = {
  67                .reg_offset = 1,
  68                .mask = WM8994_AIF1DRC1_SIG_DET,
  69        },
  70        [WM8994_IRQ_AIF1DRC2_SIG_DET] = {
  71                .reg_offset = 1,
  72                .mask = WM8994_AIF1DRC2_SIG_DET_EINT,
  73        },
  74        [WM8994_IRQ_AIF2DRC_SIG_DET] = {
  75                .reg_offset = 1,
  76                .mask = WM8994_AIF2DRC_SIG_DET_EINT,
  77        },
  78        [WM8994_IRQ_FIFOS_ERR] = {
  79                .reg_offset = 1,
  80                .mask = WM8994_FIFOS_ERR_EINT,
  81        },
  82        [WM8994_IRQ_WSEQ_DONE] = {
  83                .reg_offset = 1,
  84                .mask = WM8994_WSEQ_DONE_EINT,
  85        },
  86        [WM8994_IRQ_DCS_DONE] = {
  87                .reg_offset = 1,
  88                .mask = WM8994_DCS_DONE_EINT,
  89        },
  90        [WM8994_IRQ_TEMP_WARN] = {
  91                .reg_offset = 1,
  92                .mask = WM8994_TEMP_WARN_EINT,
  93        },
  94        [WM8994_IRQ_GPIO(1)] = {
  95                .mask = WM8994_GP1_EINT,
  96        },
  97        [WM8994_IRQ_GPIO(2)] = {
  98                .mask = WM8994_GP2_EINT,
  99        },
 100        [WM8994_IRQ_GPIO(3)] = {
 101                .mask = WM8994_GP3_EINT,
 102        },
 103        [WM8994_IRQ_GPIO(4)] = {
 104                .mask = WM8994_GP4_EINT,
 105        },
 106        [WM8994_IRQ_GPIO(5)] = {
 107                .mask = WM8994_GP5_EINT,
 108        },
 109        [WM8994_IRQ_GPIO(6)] = {
 110                .mask = WM8994_GP6_EINT,
 111        },
 112        [WM8994_IRQ_GPIO(7)] = {
 113                .mask = WM8994_GP7_EINT,
 114        },
 115        [WM8994_IRQ_GPIO(8)] = {
 116                .mask = WM8994_GP8_EINT,
 117        },
 118        [WM8994_IRQ_GPIO(9)] = {
 119                .mask = WM8994_GP8_EINT,
 120        },
 121        [WM8994_IRQ_GPIO(10)] = {
 122                .mask = WM8994_GP10_EINT,
 123        },
 124        [WM8994_IRQ_GPIO(11)] = {
 125                .mask = WM8994_GP11_EINT,
 126        },
 127};
 128
 129static struct regmap_irq_chip wm8994_irq_chip = {
 130        .name = "wm8994",
 131        .irqs = wm8994_irqs,
 132        .num_irqs = ARRAY_SIZE(wm8994_irqs),
 133
 134        .num_regs = 2,
 135        .status_base = WM8994_INTERRUPT_STATUS_1,
 136        .mask_base = WM8994_INTERRUPT_STATUS_1_MASK,
 137        .ack_base = WM8994_INTERRUPT_STATUS_1,
 138};
 139
 140int wm8994_irq_init(struct wm8994 *wm8994)
 141{
 142        int ret;
 143        unsigned long irqflags;
 144        struct wm8994_pdata *pdata = wm8994->dev->platform_data;
 145
 146        if (!wm8994->irq) {
 147                dev_warn(wm8994->dev,
 148                         "No interrupt specified, no interrupts\n");
 149                wm8994->irq_base = 0;
 150                return 0;
 151        }
 152
 153        /* select user or default irq flags */
 154        irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
 155        if (pdata->irq_flags)
 156                irqflags = pdata->irq_flags;
 157
 158        ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
 159                                  irqflags,
 160                                  wm8994->irq_base, &wm8994_irq_chip,
 161                                  &wm8994->irq_data);
 162        if (ret != 0) {
 163                dev_err(wm8994->dev, "Failed to register IRQ chip: %d\n", ret);
 164                return ret;
 165        }
 166
 167        /* Enable top level interrupt if it was masked */
 168        wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
 169
 170        return 0;
 171}
 172
 173void wm8994_irq_exit(struct wm8994 *wm8994)
 174{
 175        regmap_del_irq_chip(wm8994->irq, wm8994->irq_data);
 176}
 177
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