/*
   * wm8994-irq.c  --  Interrupt controller support for Wolfson WM8994
   *
   * Copyright 2010 Wolfson Microelectronics PLC.
   *
   * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   *
   *  This program is free software; you can redistribute  it and/or modify it
   *  under  the terms of  the GNU General  Public License as published by the
   *  Free Software Foundation;  either version 2 of the  License, or (at your
   *  option) any later version.
   *
   */
  
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/i2c.h>
  #include <linux/irq.h>
  #include <linux/mfd/core.h>
  #include <linux/interrupt.h>

  #include <linux/regmap.h>

  
  #include <linux/mfd/wm8994/core.h>
  #include <linux/mfd/wm8994/registers.h>
  
  #include <linux/delay.h>

  static struct regmap_irq wm8994_irqs[] = {

  	[WM8994_IRQ_TEMP_SHUT] = {

  		.reg_offset = 1,

  		.mask = WM8994_TEMP_SHUT_EINT,
  	},
  	[WM8994_IRQ_MIC1_DET] = {

  		.reg_offset = 1,

  		.mask = WM8994_MIC1_DET_EINT,
  	},
  	[WM8994_IRQ_MIC1_SHRT] = {

  		.reg_offset = 1,

  		.mask = WM8994_MIC1_SHRT_EINT,
  	},
  	[WM8994_IRQ_MIC2_DET] = {

  		.reg_offset = 1,

  		.mask = WM8994_MIC2_DET_EINT,
  	},
  	[WM8994_IRQ_MIC2_SHRT] = {

  		.reg_offset = 1,

  		.mask = WM8994_MIC2_SHRT_EINT,
  	},
  	[WM8994_IRQ_FLL1_LOCK] = {

  		.reg_offset = 1,

  		.mask = WM8994_FLL1_LOCK_EINT,
  	},
  	[WM8994_IRQ_FLL2_LOCK] = {

  		.reg_offset = 1,

  		.mask = WM8994_FLL2_LOCK_EINT,
  	},
  	[WM8994_IRQ_SRC1_LOCK] = {

  		.reg_offset = 1,

  		.mask = WM8994_SRC1_LOCK_EINT,
  	},
  	[WM8994_IRQ_SRC2_LOCK] = {

  		.reg_offset = 1,

  		.mask = WM8994_SRC2_LOCK_EINT,
  	},
  	[WM8994_IRQ_AIF1DRC1_SIG_DET] = {

  		.reg_offset = 1,

  		.mask = WM8994_AIF1DRC1_SIG_DET,
  	},
  	[WM8994_IRQ_AIF1DRC2_SIG_DET] = {

  		.reg_offset = 1,

  		.mask = WM8994_AIF1DRC2_SIG_DET_EINT,
  	},
  	[WM8994_IRQ_AIF2DRC_SIG_DET] = {

  		.reg_offset = 1,

  		.mask = WM8994_AIF2DRC_SIG_DET_EINT,
  	},
  	[WM8994_IRQ_FIFOS_ERR] = {

  		.reg_offset = 1,

  		.mask = WM8994_FIFOS_ERR_EINT,
  	},
  	[WM8994_IRQ_WSEQ_DONE] = {

  		.reg_offset = 1,

  		.mask = WM8994_WSEQ_DONE_EINT,
  	},
  	[WM8994_IRQ_DCS_DONE] = {

  		.reg_offset = 1,

  		.mask = WM8994_DCS_DONE_EINT,
  	},
  	[WM8994_IRQ_TEMP_WARN] = {

  		.reg_offset = 1,

  		.mask = WM8994_TEMP_WARN_EINT,
  	},
  	[WM8994_IRQ_GPIO(1)] = {

  		.mask = WM8994_GP1_EINT,
  	},
  	[WM8994_IRQ_GPIO(2)] = {

  		.mask = WM8994_GP2_EINT,
  	},
  	[WM8994_IRQ_GPIO(3)] = {

  		.mask = WM8994_GP3_EINT,
  	},
  	[WM8994_IRQ_GPIO(4)] = {

  		.mask = WM8994_GP4_EINT,
  	},
  	[WM8994_IRQ_GPIO(5)] = {

  		.mask = WM8994_GP5_EINT,
  	},
  	[WM8994_IRQ_GPIO(6)] = {

  		.mask = WM8994_GP6_EINT,
  	},
  	[WM8994_IRQ_GPIO(7)] = {

  		.mask = WM8994_GP7_EINT,
  	},
  	[WM8994_IRQ_GPIO(8)] = {

  		.mask = WM8994_GP8_EINT,
  	},
  	[WM8994_IRQ_GPIO(9)] = {

  		.mask = WM8994_GP8_EINT,
  	},
  	[WM8994_IRQ_GPIO(10)] = {

  		.mask = WM8994_GP10_EINT,
  	},
  	[WM8994_IRQ_GPIO(11)] = {

  		.mask = WM8994_GP11_EINT,
  	},
  };

  static struct regmap_irq_chip wm8994_irq_chip = {
  	.name = "wm8994",
  	.irqs = wm8994_irqs,
  	.num_irqs = ARRAY_SIZE(wm8994_irqs),

  	.num_regs = 2,
  	.status_base = WM8994_INTERRUPT_STATUS_1,
  	.mask_base = WM8994_INTERRUPT_STATUS_1_MASK,
  	.ack_base = WM8994_INTERRUPT_STATUS_1,

  };

  int wm8994_irq_init(struct wm8994 *wm8994)
  {

  	int ret;

  
  	if (!wm8994->irq) {
  		dev_warn(wm8994->dev,
  			 "No interrupt specified, no interrupts
  ");
  		wm8994->irq_base = 0;
  		return 0;
  	}
  
  	if (!wm8994->irq_base) {
  		dev_err(wm8994->dev,
  			"No interrupt base specified, no interrupts
  ");
  		return 0;
  	}

  	ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
  				  IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
  				  wm8994->irq_base, &wm8994_irq_chip,
  				  &wm8994->irq_data);

  	if (ret != 0) {

  		dev_err(wm8994->dev, "Failed to register IRQ chip: %d
  ", ret);

  		return ret;
  	}
  
  	/* Enable top level interrupt if it was masked */
  	wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
  
  	return 0;
  }
  
  void wm8994_irq_exit(struct wm8994 *wm8994)
  {

  	regmap_del_irq_chip(wm8994->irq, wm8994->irq_data);

  }