drivers/misc/pmic8058-misc.c - kernel/msm - Gitiles

 /* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */
 /*
  * Qualcomm PMIC8058 Misc Device driver
  *
  */

 #include <linux/debugfs.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/mfd/pmic8058.h>
 #include <linux/pmic8058-misc.h>

 /* VIB_DRV register */
 #define SSBI_REG_ADDR_DRV_VIB		0x4A

 #define PM8058_VIB_DRIVE_SHIFT		3
 #define PM8058_VIB_LOGIC_SHIFT		2
 #define PM8058_VIB_MIN_LEVEL_mV		1200
 #define PM8058_VIB_MAX_LEVEL_mV		3100

 /* COINCELL_CHG register */
 #define SSBI_REG_ADDR_COINCELL_CHG	(0x2F)
 #define PM8058_COINCELL_RESISTOR_SHIFT	(2)

 /* Resource offsets. */
 enum PM8058_MISC_IRQ {
 	PM8058_MISC_IRQ_OSC_HALT = 0
 };

 struct pm8058_misc_device {
 	struct pm8058_chip	*pm_chip;
 	struct dentry		*dgb_dir;
 	unsigned int		osc_halt_irq;
 	u64			osc_halt_count;
 };

 static struct pm8058_misc_device *misc_dev;

 int pm8058_vibrator_config(struct pm8058_vib_config *vib_config)
 {
 	u8 reg = 0;
 	int rc;

 	if (misc_dev == NULL) {
 		pr_info("misc_device is NULL\n");
 		return -EINVAL;
 	}

 	if (vib_config->drive_mV) {
 		if (vib_config->drive_mV < PM8058_VIB_MIN_LEVEL_mV ||
 			vib_config->drive_mV > PM8058_VIB_MAX_LEVEL_mV) {
 			pr_err("Invalid vibrator drive strength\n");
 			return -EINVAL;
 		}
 	}

 	reg = (vib_config->drive_mV / 100) << PM8058_VIB_DRIVE_SHIFT;

 	reg |= (!!vib_config->active_low) << PM8058_VIB_LOGIC_SHIFT;

 	reg |= vib_config->enable_mode;

 	rc = pm8058_write(misc_dev->pm_chip, SSBI_REG_ADDR_DRV_VIB, &reg, 1);
 	if (rc)
 		pr_err("%s: pm8058 write failed: rc=%d\n", __func__, rc);

 	return rc;
 }
 EXPORT_SYMBOL(pm8058_vibrator_config);

 /**
  * pm8058_coincell_chg_config - Disables or enables the coincell charger, and
  *				configures its voltage and resistor settings.
  * @chg_config:			Holds both voltage and resistor values, and a
  *				switch to change the state of charger.
  *				If state is to disable the charger then
  *				both voltage and resistor are disregarded.
  *
  * RETURNS: an appropriate -ERRNO error value on error, or zero for success.
  */
 int pm8058_coincell_chg_config(struct pm8058_coincell_chg_config *chg_config)
 {
 	u8 reg, voltage, resistor;
 	int rc;

 	reg = 0;
 	voltage = 0;
 	resistor = 0;
 	rc = 0;

 	if (misc_dev == NULL) {
 		pr_err("misc_device is NULL\n");
 		return -EINVAL;
 	}

 	if (chg_config == NULL) {
 		pr_err("chg_config is NULL\n");
 		return -EINVAL;
 	}

 	if (chg_config->state == PM8058_COINCELL_CHG_DISABLE) {
 		rc = pm8058_write(misc_dev->pm_chip,
 				SSBI_REG_ADDR_COINCELL_CHG, &reg, 1);
 		if (rc)
 			pr_err("%s: pm8058 write failed: rc=%d\n",
 							__func__, rc);
 		return rc;
 	}

 	voltage = chg_config->voltage;
 	resistor = chg_config->resistor;

 	if (voltage < PM8058_COINCELL_VOLTAGE_3p2V ||
 			(voltage > PM8058_COINCELL_VOLTAGE_3p0V &&
 				voltage != PM8058_COINCELL_VOLTAGE_2p5V)) {
 		pr_err("Invalid voltage value provided\n");
 		return -EINVAL;
 	}

 	if (resistor < PM8058_COINCELL_RESISTOR_2100_OHMS ||
 			resistor > PM8058_COINCELL_RESISTOR_800_OHMS) {
 		pr_err("Invalid resistor value provided\n");
 		return -EINVAL;
 	}

 	reg |= voltage;

 	reg |= (resistor << PM8058_COINCELL_RESISTOR_SHIFT);

 	rc = pm8058_write(misc_dev->pm_chip,
 			SSBI_REG_ADDR_COINCELL_CHG, &reg, 1);

 	if (rc)
 		pr_err("%s: pm8058 write failed: rc=%d\n", __func__, rc);

 	return rc;
 }
 EXPORT_SYMBOL(pm8058_coincell_chg_config);

 /* Handle the OSC_HALT interrupt: 32 kHz XTAL oscillator has stopped. */
 static irqreturn_t pm8058_osc_halt_isr(int irq, void *data)
 {
 	struct pm8058_misc_device *miscdev = data;
 	u64 count = 0;

 	if (miscdev) {
 		miscdev->osc_halt_count++;
 		count = miscdev->osc_halt_count;
 	}

 	pr_crit("%s: OSC_HALT interrupt has triggered, 32 kHz XTAL oscillator"
 		" has halted (%llu)!\n", __func__, count);

 	return IRQ_HANDLED;
 }

 #if defined(CONFIG_DEBUG_FS)

 static int osc_halt_count_get(void *data, u64 *val)
 {
 	struct pm8058_misc_device *miscdev = data;

 	if (miscdev == NULL) {
 		pr_err("%s: null pointer input.\n", __func__);
 		return -EINVAL;
 	}

 	*val = miscdev->osc_halt_count;

 	return 0;
 }

 DEFINE_SIMPLE_ATTRIBUTE(dbg_osc_halt_fops, osc_halt_count_get, NULL, "%llu\n");

 static int __devinit pmic8058_misc_dbg_probe(struct pm8058_misc_device *miscdev)
 {
 	struct dentry *dent;
 	struct dentry *temp;

 	if (miscdev == NULL) {
 		pr_err("%s: no parent data passed in.\n", __func__);
 		return -EINVAL;
 	}

 	dent = debugfs_create_dir("pm8058-misc", NULL);
 	if (dent == NULL || IS_ERR(dent)) {
 		pr_err("%s: ERR debugfs_create_dir: dent=0x%X\n",
 					__func__, (unsigned)dent);
 		return -ENOMEM;
 	}

 	temp = debugfs_create_file("osc_halt_count", S_IRUSR, dent,
 					miscdev, &dbg_osc_halt_fops);
 	if (temp == NULL || IS_ERR(temp)) {
 		pr_err("%s: ERR debugfs_create_file: dent=0x%X\n",
 					__func__, (unsigned)temp);
 		goto debug_error;
 	}

 	miscdev->dgb_dir = dent;
 	return 0;

 debug_error:
 	debugfs_remove_recursive(dent);
 	return -ENOMEM;
 }

 static int __devexit pmic8058_misc_dbg_remove(
 		struct pm8058_misc_device *miscdev)
 {
 	if (miscdev->dgb_dir)
 		debugfs_remove_recursive(miscdev->dgb_dir);

 	return 0;
 }

 #else

 static int __devinit pmic8058_misc_dbg_probe(struct pm8058_misc_device *miscdev)
 {
 	return 0;
 }

 static int __devexit pmic8058_misc_dbg_remove(
 		struct pm8058_misc_device *miscdev)
 {
 	return 0;
 }

 #endif


 static int __devinit pmic8058_misc_probe(struct platform_device *pdev)
 {
 	struct pm8058_misc_device *miscdev;
 	struct pm8058_chip *pm_chip;
 	unsigned int irq;
 	int rc;

 	pm_chip = dev_get_drvdata(pdev->dev.parent);
 	if (pm_chip == NULL) {
 		pr_err("%s: no driver data passed in.\n", __func__);
 		return -EFAULT;
 	}

 	irq = platform_get_irq(pdev, PM8058_MISC_IRQ_OSC_HALT);
 	if (!irq) {
 		pr_err("%s: no IRQ passed in.\n", __func__);
 		return -EFAULT;
 	}

 	miscdev = kzalloc(sizeof *miscdev, GFP_KERNEL);
 	if (miscdev == NULL) {
 		pr_err("%s: kzalloc() failed.\n", __func__);
 		return -ENOMEM;
 	}

 	miscdev->pm_chip = pm_chip;
 	platform_set_drvdata(pdev, miscdev);

 	rc = request_threaded_irq(irq, NULL, pm8058_osc_halt_isr,
 			 IRQF_TRIGGER_RISING | IRQF_DISABLED,
 			 "pm8058-osc_halt-irq", miscdev);
 	if (rc < 0) {
 		pr_err("%s: request_irq(%d) FAIL: %d\n", __func__, irq, rc);
 		platform_set_drvdata(pdev, miscdev->pm_chip);
 		kfree(miscdev);
 		return rc;
 	}
 	miscdev->osc_halt_irq = irq;
 	miscdev->osc_halt_count = 0;

 	rc = pmic8058_misc_dbg_probe(miscdev);
 	if (rc)
 		return rc;

 	misc_dev = miscdev;

 	pr_notice("%s: OK\n", __func__);
 	return 0;
 }

 static int __devexit pmic8058_misc_remove(struct platform_device *pdev)
 {
 	struct pm8058_misc_device *miscdev = platform_get_drvdata(pdev);

 	pmic8058_misc_dbg_remove(miscdev);

 	platform_set_drvdata(pdev, miscdev->pm_chip);
 	free_irq(miscdev->osc_halt_irq, miscdev);
 	kfree(miscdev);

 	return 0;
 }

 static struct platform_driver pmic8058_misc_driver = {
 	.probe	= pmic8058_misc_probe,
 	.remove	= __devexit_p(pmic8058_misc_remove),
 	.driver	= {
 		.name = "pm8058-misc",
 		.owner = THIS_MODULE,
 	},
 };

 static int __init pm8058_misc_init(void)
 {
 	return platform_driver_register(&pmic8058_misc_driver);
 }

 static void __exit pm8058_misc_exit(void)
 {
 	platform_driver_unregister(&pmic8058_misc_driver);
 }

 module_init(pm8058_misc_init);
 module_exit(pm8058_misc_exit);

 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("PMIC8058 Misc Device driver");
 MODULE_VERSION("1.0");
 MODULE_ALIAS("platform:pmic8058-misc");
	/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/
	/*
	* Qualcomm PMIC8058 Misc Device driver
	*
	*/

	#include <linux/debugfs.h>
	#include <linux/err.h>
	#include <linux/interrupt.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <linux/mfd/pmic8058.h>
	#include <linux/pmic8058-misc.h>

	/* VIB_DRV register */
	#define SSBI_REG_ADDR_DRV_VIB 0x4A

	#define PM8058_VIB_DRIVE_SHIFT 3
	#define PM8058_VIB_LOGIC_SHIFT 2
	#define PM8058_VIB_MIN_LEVEL_mV 1200
	#define PM8058_VIB_MAX_LEVEL_mV 3100

	/* COINCELL_CHG register */
	#define SSBI_REG_ADDR_COINCELL_CHG (0x2F)
	#define PM8058_COINCELL_RESISTOR_SHIFT (2)

	/* Resource offsets. */
	enum PM8058_MISC_IRQ {
	PM8058_MISC_IRQ_OSC_HALT = 0
	};

	struct pm8058_misc_device {
	struct pm8058_chip *pm_chip;
	struct dentry *dgb_dir;
	unsigned int osc_halt_irq;
	u64 osc_halt_count;
	};

	static struct pm8058_misc_device *misc_dev;

	int pm8058_vibrator_config(struct pm8058_vib_config *vib_config)
	{
	u8 reg = 0;
	int rc;

	if (misc_dev == NULL) {
	pr_info("misc_device is NULL\n");
	return -EINVAL;
	}

	if (vib_config->drive_mV) {
	if (vib_config->drive_mV < PM8058_VIB_MIN_LEVEL_mV \|\|
	vib_config->drive_mV > PM8058_VIB_MAX_LEVEL_mV) {
	pr_err("Invalid vibrator drive strength\n");
	return -EINVAL;
	}
	}

	reg = (vib_config->drive_mV / 100) << PM8058_VIB_DRIVE_SHIFT;

	reg \|= (!!vib_config->active_low) << PM8058_VIB_LOGIC_SHIFT;

	reg \|= vib_config->enable_mode;

	rc = pm8058_write(misc_dev->pm_chip, SSBI_REG_ADDR_DRV_VIB, &reg, 1);
	if (rc)
	pr_err("%s: pm8058 write failed: rc=%d\n", __func__, rc);

	return rc;
	}
	EXPORT_SYMBOL(pm8058_vibrator_config);

	/**
	* pm8058_coincell_chg_config - Disables or enables the coincell charger, and
	* configures its voltage and resistor settings.
	* @chg_config: Holds both voltage and resistor values, and a
	* switch to change the state of charger.
	* If state is to disable the charger then
	* both voltage and resistor are disregarded.
	*
	* RETURNS: an appropriate -ERRNO error value on error, or zero for success.
	*/
	int pm8058_coincell_chg_config(struct pm8058_coincell_chg_config *chg_config)
	{
	u8 reg, voltage, resistor;
	int rc;

	reg = 0;
	voltage = 0;
	resistor = 0;
	rc = 0;

	if (misc_dev == NULL) {
	pr_err("misc_device is NULL\n");
	return -EINVAL;
	}

	if (chg_config == NULL) {
	pr_err("chg_config is NULL\n");
	return -EINVAL;
	}

	if (chg_config->state == PM8058_COINCELL_CHG_DISABLE) {
	rc = pm8058_write(misc_dev->pm_chip,
	SSBI_REG_ADDR_COINCELL_CHG, &reg, 1);
	if (rc)
	pr_err("%s: pm8058 write failed: rc=%d\n",
	__func__, rc);
	return rc;
	}

	voltage = chg_config->voltage;
	resistor = chg_config->resistor;

	if (voltage < PM8058_COINCELL_VOLTAGE_3p2V \|\|
	(voltage > PM8058_COINCELL_VOLTAGE_3p0V &&
	voltage != PM8058_COINCELL_VOLTAGE_2p5V)) {
	pr_err("Invalid voltage value provided\n");
	return -EINVAL;
	}

	if (resistor < PM8058_COINCELL_RESISTOR_2100_OHMS \|\|
	resistor > PM8058_COINCELL_RESISTOR_800_OHMS) {
	pr_err("Invalid resistor value provided\n");
	return -EINVAL;
	}

	reg \|= voltage;

	reg \|= (resistor << PM8058_COINCELL_RESISTOR_SHIFT);

	rc = pm8058_write(misc_dev->pm_chip,
	SSBI_REG_ADDR_COINCELL_CHG, &reg, 1);

	if (rc)
	pr_err("%s: pm8058 write failed: rc=%d\n", __func__, rc);

	return rc;
	}
	EXPORT_SYMBOL(pm8058_coincell_chg_config);

	/* Handle the OSC_HALT interrupt: 32 kHz XTAL oscillator has stopped. */
	static irqreturn_t pm8058_osc_halt_isr(int irq, void *data)
	{
	struct pm8058_misc_device *miscdev = data;
	u64 count = 0;

	if (miscdev) {
	miscdev->osc_halt_count++;
	count = miscdev->osc_halt_count;
	}

	pr_crit("%s: OSC_HALT interrupt has triggered, 32 kHz XTAL oscillator"
	" has halted (%llu)!\n", __func__, count);

	return IRQ_HANDLED;
	}

	#if defined(CONFIG_DEBUG_FS)

	static int osc_halt_count_get(void data, u64 val)
	{
	struct pm8058_misc_device *miscdev = data;

	if (miscdev == NULL) {
	pr_err("%s: null pointer input.\n", __func__);
	return -EINVAL;
	}

	*val = miscdev->osc_halt_count;

	return 0;
	}

	DEFINE_SIMPLE_ATTRIBUTE(dbg_osc_halt_fops, osc_halt_count_get, NULL, "%llu\n");

	static int __devinit pmic8058_misc_dbg_probe(struct pm8058_misc_device *miscdev)
	{
	struct dentry *dent;
	struct dentry *temp;

	if (miscdev == NULL) {
	pr_err("%s: no parent data passed in.\n", __func__);
	return -EINVAL;
	}

	dent = debugfs_create_dir("pm8058-misc", NULL);
	if (dent == NULL \|\| IS_ERR(dent)) {
	pr_err("%s: ERR debugfs_create_dir: dent=0x%X\n",
	__func__, (unsigned)dent);
	return -ENOMEM;
	}

	temp = debugfs_create_file("osc_halt_count", S_IRUSR, dent,
	miscdev, &dbg_osc_halt_fops);
	if (temp == NULL \|\| IS_ERR(temp)) {
	pr_err("%s: ERR debugfs_create_file: dent=0x%X\n",
	__func__, (unsigned)temp);
	goto debug_error;
	}

	miscdev->dgb_dir = dent;
	return 0;

	debug_error:
	debugfs_remove_recursive(dent);
	return -ENOMEM;
	}

	static int __devexit pmic8058_misc_dbg_remove(
	struct pm8058_misc_device *miscdev)
	{
	if (miscdev->dgb_dir)
	debugfs_remove_recursive(miscdev->dgb_dir);

	return 0;
	}

	#else

	static int __devinit pmic8058_misc_dbg_probe(struct pm8058_misc_device *miscdev)
	{
	return 0;
	}

	static int __devexit pmic8058_misc_dbg_remove(
	struct pm8058_misc_device *miscdev)
	{
	return 0;
	}

	#endif


	static int __devinit pmic8058_misc_probe(struct platform_device *pdev)
	{
	struct pm8058_misc_device *miscdev;
	struct pm8058_chip *pm_chip;
	unsigned int irq;
	int rc;

	pm_chip = dev_get_drvdata(pdev->dev.parent);
	if (pm_chip == NULL) {
	pr_err("%s: no driver data passed in.\n", __func__);
	return -EFAULT;
	}

	irq = platform_get_irq(pdev, PM8058_MISC_IRQ_OSC_HALT);
	if (!irq) {
	pr_err("%s: no IRQ passed in.\n", __func__);
	return -EFAULT;
	}

	miscdev = kzalloc(sizeof *miscdev, GFP_KERNEL);
	if (miscdev == NULL) {
	pr_err("%s: kzalloc() failed.\n", __func__);
	return -ENOMEM;
	}

	miscdev->pm_chip = pm_chip;
	platform_set_drvdata(pdev, miscdev);

	rc = request_threaded_irq(irq, NULL, pm8058_osc_halt_isr,
	IRQF_TRIGGER_RISING \| IRQF_DISABLED,
	"pm8058-osc_halt-irq", miscdev);
	if (rc < 0) {
	pr_err("%s: request_irq(%d) FAIL: %d\n", __func__, irq, rc);
	platform_set_drvdata(pdev, miscdev->pm_chip);
	kfree(miscdev);
	return rc;
	}
	miscdev->osc_halt_irq = irq;
	miscdev->osc_halt_count = 0;

	rc = pmic8058_misc_dbg_probe(miscdev);
	if (rc)
	return rc;

	misc_dev = miscdev;

	pr_notice("%s: OK\n", __func__);
	return 0;
	}

	static int __devexit pmic8058_misc_remove(struct platform_device *pdev)
	{
	struct pm8058_misc_device *miscdev = platform_get_drvdata(pdev);

	pmic8058_misc_dbg_remove(miscdev);

	platform_set_drvdata(pdev, miscdev->pm_chip);
	free_irq(miscdev->osc_halt_irq, miscdev);
	kfree(miscdev);

	return 0;
	}

	static struct platform_driver pmic8058_misc_driver = {
	.probe = pmic8058_misc_probe,
	.remove = __devexit_p(pmic8058_misc_remove),
	.driver = {
	.name = "pm8058-misc",
	.owner = THIS_MODULE,
	},
	};

	static int __init pm8058_misc_init(void)
	{
	return platform_driver_register(&pmic8058_misc_driver);
	}

	static void __exit pm8058_misc_exit(void)
	{
	platform_driver_unregister(&pmic8058_misc_driver);
	}

	module_init(pm8058_misc_init);
	module_exit(pm8058_misc_exit);

	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("PMIC8058 Misc Device driver");
	MODULE_VERSION("1.0");
	MODULE_ALIAS("platform:pmic8058-misc");