drivers/mfd/wm8994-irq.c

   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
  29 static 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
 129 static 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
 140 int 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
 173 void wm8994_irq_exit(struct wm8994 *wm8994)
 174 {
 175         regmap_del_irq_chip(wm8994->irq, wm8994->irq_data);
 176 }