drivers/mfd/arizona-irq.c - kernel/msm-4.9 - Gitiles

 /*
  * Arizona interrupt support
  *
  * Copyright 2012 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 version 2 as
  * published by the Free Software Foundation.
  */

 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>

 #include <linux/mfd/arizona/core.h>
 #include <linux/mfd/arizona/registers.h>

 #include "arizona.h"

 static int arizona_map_irq(struct arizona *arizona, int irq)
 {
 	int ret;

 	ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
 	if (ret < 0)
 		ret = regmap_irq_get_virq(arizona->irq_chip, irq);

 	return ret;
 }

 int arizona_request_irq(struct arizona *arizona, int irq, char *name,
 			   irq_handler_t handler, void *data)
 {
 	irq = arizona_map_irq(arizona, irq);
 	if (irq < 0)
 		return irq;

 	return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
 				    name, data);
 }
 EXPORT_SYMBOL_GPL(arizona_request_irq);

 void arizona_free_irq(struct arizona *arizona, int irq, void *data)
 {
 	irq = arizona_map_irq(arizona, irq);
 	if (irq < 0)
 		return;

 	free_irq(irq, data);
 }
 EXPORT_SYMBOL_GPL(arizona_free_irq);

 int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
 {
 	irq = arizona_map_irq(arizona, irq);
 	if (irq < 0)
 		return irq;

 	return irq_set_irq_wake(irq, on);
 }
 EXPORT_SYMBOL_GPL(arizona_set_irq_wake);

 static irqreturn_t arizona_boot_done(int irq, void *data)
 {
 	struct arizona *arizona = data;

 	dev_dbg(arizona->dev, "Boot done\n");

 	return IRQ_HANDLED;
 }

 static irqreturn_t arizona_ctrlif_err(int irq, void *data)
 {
 	struct arizona *arizona = data;

 	/*
 	 * For pretty much all potential sources a register cache sync
 	 * won't help, we've just got a software bug somewhere.
 	 */
 	dev_err(arizona->dev, "Control interface error\n");

 	return IRQ_HANDLED;
 }

 static irqreturn_t arizona_irq_thread(int irq, void *data)
 {
 	struct arizona *arizona = data;
 	unsigned int val;
 	int ret;

 	ret = pm_runtime_get_sync(arizona->dev);
 	if (ret < 0) {
 		dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
 		return IRQ_NONE;
 	}

 	/* Always handle the AoD domain */
 	handle_nested_irq(irq_find_mapping(arizona->virq, 0));

 	/*
 	 * Check if one of the main interrupts is asserted and only
 	 * check that domain if it is.
 	 */
 	ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, &val);
 	if (ret == 0 && val & ARIZONA_IRQ1_STS) {
 		handle_nested_irq(irq_find_mapping(arizona->virq, 1));
 	} else if (ret != 0) {
 		dev_err(arizona->dev, "Failed to read main IRQ status: %d\n",
 			ret);
 	}

 	pm_runtime_mark_last_busy(arizona->dev);
 	pm_runtime_put_autosuspend(arizona->dev);

 	return IRQ_HANDLED;
 }

 static void arizona_irq_enable(struct irq_data *data)
 {
 }

 static void arizona_irq_disable(struct irq_data *data)
 {
 }

 static struct irq_chip arizona_irq_chip = {
 	.name			= "arizona",
 	.irq_disable		= arizona_irq_disable,
 	.irq_enable		= arizona_irq_enable,
 };

 static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
 			      irq_hw_number_t hw)
 {
 	struct regmap_irq_chip_data *data = h->host_data;

 	irq_set_chip_data(virq, data);
 	irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_edge_irq);
 	irq_set_nested_thread(virq, 1);

 	/* ARM needs us to explicitly flag the IRQ as valid
 	 * and will set them noprobe when we do so. */
 #ifdef CONFIG_ARM
 	set_irq_flags(virq, IRQF_VALID);
 #else
 	irq_set_noprobe(virq);
 #endif

 	return 0;
 }

 static struct irq_domain_ops arizona_domain_ops = {
 	.map	= arizona_irq_map,
 	.xlate	= irq_domain_xlate_twocell,
 };

 int arizona_irq_init(struct arizona *arizona)
 {
 	int flags = IRQF_ONESHOT;
 	int ret, i;
 	const struct regmap_irq_chip *aod, *irq;
 	bool ctrlif_error = true;

 	switch (arizona->type) {
 #ifdef CONFIG_MFD_WM5102
 	case WM5102:
 		aod = &wm5102_aod;
 		irq = &wm5102_irq;

 		ctrlif_error = false;
 		break;
 #endif
 #ifdef CONFIG_MFD_WM5110
 	case WM5110:
 		aod = &wm5110_aod;
 		irq = &wm5110_irq;

 		ctrlif_error = false;
 		break;
 #endif
 	default:
 		BUG_ON("Unknown Arizona class device" == NULL);
 		return -EINVAL;
 	}

 	if (arizona->pdata.irq_active_high) {
 		ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
 					 ARIZONA_IRQ_POL, 0);
 		if (ret != 0) {
 			dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
 				ret);
 			goto err;
 		}

 		flags |= IRQF_TRIGGER_HIGH;
 	} else {
 		flags |= IRQF_TRIGGER_LOW;
 	}

 	/* Allocate a virtual IRQ domain to distribute to the regmap domains */
 	arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
 					      arizona);
 	if (!arizona->virq) {
 		dev_err(arizona->dev, "Failed to add core IRQ domain\n");
 		ret = -EINVAL;
 		goto err;
 	}

 	ret = regmap_add_irq_chip(arizona->regmap,
 				  irq_create_mapping(arizona->virq, 0),
 				  IRQF_ONESHOT, -1, aod,
 				  &arizona->aod_irq_chip);
 	if (ret != 0) {
 		dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
 		goto err_domain;
 	}

 	ret = regmap_add_irq_chip(arizona->regmap,
 				  irq_create_mapping(arizona->virq, 1),
 				  IRQF_ONESHOT, -1, irq,
 				  &arizona->irq_chip);
 	if (ret != 0) {
 		dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
 		goto err_aod;
 	}

 	/* Make sure the boot done IRQ is unmasked for resumes */
 	i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE);
 	ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT,
 				   "Boot done", arizona);
 	if (ret != 0) {
 		dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
 			arizona->irq, ret);
 		goto err_boot_done;
 	}

 	/* Handle control interface errors in the core */
 	if (ctrlif_error) {
 		i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
 		ret = request_threaded_irq(i, NULL, arizona_ctrlif_err,
 					   IRQF_ONESHOT,
 					   "Control interface error", arizona);
 		if (ret != 0) {
 			dev_err(arizona->dev,
 				"Failed to request CTRLIF_ERR %d: %d\n",
 				arizona->irq, ret);
 			goto err_ctrlif;
 		}
 	}

 	ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
 				   flags, "arizona", arizona);

 	if (ret != 0) {
 		dev_err(arizona->dev, "Failed to request IRQ %d: %d\n",
 			arizona->irq, ret);
 		goto err_main_irq;
 	}

 	return 0;

 err_main_irq:
 	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
 err_ctrlif:
 	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
 err_boot_done:
 	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
 			    arizona->irq_chip);
 err_aod:
 	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
 			    arizona->aod_irq_chip);
 err_domain:
 err:
 	return ret;
 }

 int arizona_irq_exit(struct arizona *arizona)
 {
 	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
 	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
 	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
 			    arizona->irq_chip);
 	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
 			    arizona->aod_irq_chip);
 	free_irq(arizona->irq, arizona);

 	return 0;
 }
	/*
	* Arizona interrupt support
	*
	* Copyright 2012 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 version 2 as
	* published by the Free Software Foundation.
	*/

	#include <linux/delay.h>
	#include <linux/gpio.h>
	#include <linux/interrupt.h>
	#include <linux/irq.h>
	#include <linux/irqdomain.h>
	#include <linux/module.h>
	#include <linux/pm_runtime.h>
	#include <linux/regmap.h>
	#include <linux/regulator/consumer.h>
	#include <linux/slab.h>

	#include <linux/mfd/arizona/core.h>
	#include <linux/mfd/arizona/registers.h>

	#include "arizona.h"

	static int arizona_map_irq(struct arizona *arizona, int irq)
	{
	int ret;

	ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
	if (ret < 0)
	ret = regmap_irq_get_virq(arizona->irq_chip, irq);

	return ret;
	}

	int arizona_request_irq(struct arizona arizona, int irq, char name,
	irq_handler_t handler, void *data)
	{
	irq = arizona_map_irq(arizona, irq);
	if (irq < 0)
	return irq;

	return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
	name, data);
	}
	EXPORT_SYMBOL_GPL(arizona_request_irq);

	void arizona_free_irq(struct arizona arizona, int irq, void data)
	{
	irq = arizona_map_irq(arizona, irq);
	if (irq < 0)
	return;

	free_irq(irq, data);
	}
	EXPORT_SYMBOL_GPL(arizona_free_irq);

	int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
	{
	irq = arizona_map_irq(arizona, irq);
	if (irq < 0)
	return irq;

	return irq_set_irq_wake(irq, on);
	}
	EXPORT_SYMBOL_GPL(arizona_set_irq_wake);

	static irqreturn_t arizona_boot_done(int irq, void *data)
	{
	struct arizona *arizona = data;

	dev_dbg(arizona->dev, "Boot done\n");

	return IRQ_HANDLED;
	}

	static irqreturn_t arizona_ctrlif_err(int irq, void *data)
	{
	struct arizona *arizona = data;

	/*
	* For pretty much all potential sources a register cache sync
	* won't help, we've just got a software bug somewhere.
	*/
	dev_err(arizona->dev, "Control interface error\n");

	return IRQ_HANDLED;
	}

	static irqreturn_t arizona_irq_thread(int irq, void *data)
	{
	struct arizona *arizona = data;
	unsigned int val;
	int ret;

	ret = pm_runtime_get_sync(arizona->dev);
	if (ret < 0) {
	dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
	return IRQ_NONE;
	}

	/* Always handle the AoD domain */
	handle_nested_irq(irq_find_mapping(arizona->virq, 0));

	/*
	* Check if one of the main interrupts is asserted and only
	* check that domain if it is.
	*/
	ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, &val);
	if (ret == 0 && val & ARIZONA_IRQ1_STS) {
	handle_nested_irq(irq_find_mapping(arizona->virq, 1));
	} else if (ret != 0) {
	dev_err(arizona->dev, "Failed to read main IRQ status: %d\n",
	ret);
	}

	pm_runtime_mark_last_busy(arizona->dev);
	pm_runtime_put_autosuspend(arizona->dev);

	return IRQ_HANDLED;
	}

	static void arizona_irq_enable(struct irq_data *data)
	{
	}

	static void arizona_irq_disable(struct irq_data *data)
	{
	}

	static struct irq_chip arizona_irq_chip = {
	.name = "arizona",
	.irq_disable = arizona_irq_disable,
	.irq_enable = arizona_irq_enable,
	};

	static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
	irq_hw_number_t hw)
	{
	struct regmap_irq_chip_data *data = h->host_data;

	irq_set_chip_data(virq, data);
	irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_edge_irq);
	irq_set_nested_thread(virq, 1);

	/* ARM needs us to explicitly flag the IRQ as valid
	* and will set them noprobe when we do so. */
	#ifdef CONFIG_ARM
	set_irq_flags(virq, IRQF_VALID);
	#else
	irq_set_noprobe(virq);
	#endif

	return 0;
	}

	static struct irq_domain_ops arizona_domain_ops = {
	.map = arizona_irq_map,
	.xlate = irq_domain_xlate_twocell,
	};

	int arizona_irq_init(struct arizona *arizona)
	{
	int flags = IRQF_ONESHOT;
	int ret, i;
	const struct regmap_irq_chip aod, irq;
	bool ctrlif_error = true;

	switch (arizona->type) {
	#ifdef CONFIG_MFD_WM5102
	case WM5102:
	aod = &wm5102_aod;
	irq = &wm5102_irq;

	ctrlif_error = false;
	break;
	#endif
	#ifdef CONFIG_MFD_WM5110
	case WM5110:
	aod = &wm5110_aod;
	irq = &wm5110_irq;

	ctrlif_error = false;
	break;
	#endif
	default:
	BUG_ON("Unknown Arizona class device" == NULL);
	return -EINVAL;
	}

	if (arizona->pdata.irq_active_high) {
	ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
	ARIZONA_IRQ_POL, 0);
	if (ret != 0) {
	dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
	ret);
	goto err;
	}

	flags \|= IRQF_TRIGGER_HIGH;
	} else {
	flags \|= IRQF_TRIGGER_LOW;
	}

	/* Allocate a virtual IRQ domain to distribute to the regmap domains */
	arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
	arizona);
	if (!arizona->virq) {
	dev_err(arizona->dev, "Failed to add core IRQ domain\n");
	ret = -EINVAL;
	goto err;
	}

	ret = regmap_add_irq_chip(arizona->regmap,
	irq_create_mapping(arizona->virq, 0),
	IRQF_ONESHOT, -1, aod,
	&arizona->aod_irq_chip);
	if (ret != 0) {
	dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
	goto err_domain;
	}

	ret = regmap_add_irq_chip(arizona->regmap,
	irq_create_mapping(arizona->virq, 1),
	IRQF_ONESHOT, -1, irq,
	&arizona->irq_chip);
	if (ret != 0) {
	dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
	goto err_aod;
	}

	/* Make sure the boot done IRQ is unmasked for resumes */
	i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE);
	ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT,
	"Boot done", arizona);
	if (ret != 0) {
	dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
	arizona->irq, ret);
	goto err_boot_done;
	}

	/* Handle control interface errors in the core */
	if (ctrlif_error) {
	i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
	ret = request_threaded_irq(i, NULL, arizona_ctrlif_err,
	IRQF_ONESHOT,
	"Control interface error", arizona);
	if (ret != 0) {
	dev_err(arizona->dev,
	"Failed to request CTRLIF_ERR %d: %d\n",
	arizona->irq, ret);
	goto err_ctrlif;
	}
	}

	ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
	flags, "arizona", arizona);

	if (ret != 0) {
	dev_err(arizona->dev, "Failed to request IRQ %d: %d\n",
	arizona->irq, ret);
	goto err_main_irq;
	}

	return 0;

	err_main_irq:
	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
	err_ctrlif:
	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
	err_boot_done:
	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
	arizona->irq_chip);
	err_aod:
	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
	arizona->aod_irq_chip);
	err_domain:
	err:
	return ret;
	}

	int arizona_irq_exit(struct arizona *arizona)
	{
	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
	free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
	arizona->irq_chip);
	regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
	arizona->aod_irq_chip);
	free_irq(arizona->irq, arizona);

	return 0;
	}