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