platform: msm: Add QPNP PMIC vibrator driver (6e830ef5) · Commits · e / devices / android_kernel_xiaomi_markw

Documentation/devicetree/bindings/platform/msm/qpnp-vibrator.txt

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		QPNP Vibrator

		QPNP (Qualcomm technologies Inc Plug N Play) vibrator is a peripheral on
		Qualcomm technologies Inc PMICs. The PMIC is connected to Host processor
		via SPMI bus.

		Required Properties:
		- status: default status is set to "disabled. Must be "okay"
		- compatible: must be "qcom,qpnp-vibrator"
		- label: name which describes the device
		- reg: address of device

		Optional Properties:
		- qcom,vib-timeout-ms: timeout of vibrator, in ms. Default 15000 ms
		- qcom,vib-vtg-level-mV: voltage level, in mV. Default 3100 mV

		Example:
		qcom,vib@c000 {
		status = "okay";
		compatible = "qcom,qpnp-vibrator";
		reg = <0xc000 0x100>;
		label = "vibrator";
		qcom,vib-timeout-ms = <15000>;
		qcom,vib-vtg-level-mV = <3100>;
		};

drivers/platform/msm/Kconfig

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		@@ -128,6 +128,16 @@ config SPS_SUPPORT_NDP_BAM
		help
		No-Data-Path BAM is used to improve BAM performance.

		config QPNP_VIBRATOR
		tristate "Vibrator support for QPNP PMIC"
		depends on OF_SPMI
		help
		This option enables device driver support for the vibrator
		on the Qualcomm technologies Inc's QPNP PMICs. The vibrator
		is connected on the VIB_DRV_N line and can be controlled
		manually or by the DTEST lines.It uses the android timed-output
		framework.

		config IPA
		tristate "IPA support"
		depends on SPS && NET

drivers/platform/msm/Makefile

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		@@ -19,6 +19,7 @@ obj-$(CONFIG_SEEMP_CORE) += seemp_core/
		obj-$(CONFIG_QPNP_HAPTIC) += qpnp-haptic.o
		obj-$(CONFIG_GPIO_USB_DETECT) += gpio-usbdetect.o
		obj-$(CONFIG_USB_BAM) += usb_bam.o
		obj-$(CONFIG_QPNP_VIBRATOR) += qpnp-vibrator.o
		obj-$(CONFIG_MSM_AVTIMER) += avtimer.o
		obj-$(CONFIG_MSM_11AD) += msm_11ad/
		obj-$(CONFIG_MSM_MHI_DEV) += mhi_dev/

drivers/platform/msm/qpnp-vibrator.c

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		/* Copyright (c) 2013-2015, The Linux Foundation. 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.
		*/

		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/kernel.h>
		#include <linux/errno.h>
		#include <linux/slab.h>
		#include <linux/hrtimer.h>
		#include <linux/of_device.h>
		#include <linux/spmi.h>

		#include <linux/qpnp/vibrator.h>
		#include "../../staging/android/timed_output.h"

		#define QPNP_VIB_VTG_CTL(base) (base + 0x41)
		#define QPNP_VIB_EN_CTL(base) (base + 0x46)

		#define QPNP_VIB_MAX_LEVEL 31
		#define QPNP_VIB_MIN_LEVEL 12

		#define QPNP_VIB_DEFAULT_TIMEOUT 15000
		#define QPNP_VIB_DEFAULT_VTG_LVL 3100

		#define QPNP_VIB_EN BIT(7)
		#define QPNP_VIB_VTG_SET_MASK 0x1F
		#define QPNP_VIB_LOGIC_SHIFT 4

		struct qpnp_vib {
		struct spmi_device *spmi;
		struct hrtimer vib_timer;
		struct timed_output_dev timed_dev;
		struct work_struct work;

		u8 reg_vtg_ctl;
		u8 reg_en_ctl;
		u16 base;
		int state;
		int vtg_level;
		int timeout;
		struct mutex lock;
		};

		static struct qpnp_vib *vib_dev;

		static int qpnp_vib_read_u8(struct qpnp_vib vib, u8 data, u16 reg)
		{
		int rc;

		rc = spmi_ext_register_readl(vib->spmi->ctrl, vib->spmi->sid,
		reg, data, 1);
		if (rc < 0)
		dev_err(&vib->spmi->dev,
		"Error reading address: %X - ret %X\n", reg, rc);

		return rc;
		}

		static int qpnp_vib_write_u8(struct qpnp_vib vib, u8 data, u16 reg)
		{
		int rc;

		rc = spmi_ext_register_writel(vib->spmi->ctrl, vib->spmi->sid,
		reg, data, 1);
		if (rc < 0)
		dev_err(&vib->spmi->dev,
		"Error writing address: %X - ret %X\n", reg, rc);

		return rc;
		}

		int qpnp_vibrator_config(struct qpnp_vib_config *vib_cfg)
		{
		u8 reg = 0;
		int rc = -EINVAL, level;

		if (vib_dev == NULL) {
		pr_err("%s: vib_dev is NULL\n", __func__);
		return -ENODEV;
		}

		level = vib_cfg->drive_mV / 100;
		if (level) {
		if ((level < QPNP_VIB_MIN_LEVEL) \|\|
		(level > QPNP_VIB_MAX_LEVEL)) {
		dev_err(&vib_dev->spmi->dev, "Invalid voltage level\n");
		return -EINVAL;
		}
		} else {
		dev_err(&vib_dev->spmi->dev, "Voltage level not specified\n");
		return -EINVAL;
		}

		/* Configure the VTG CTL regiser */
		reg = vib_dev->reg_vtg_ctl;
		reg &= ~QPNP_VIB_VTG_SET_MASK;
		reg \|= (level & QPNP_VIB_VTG_SET_MASK);
		rc = qpnp_vib_write_u8(vib_dev, &reg, QPNP_VIB_VTG_CTL(vib_dev->base));
		if (rc)
		return rc;
		vib_dev->reg_vtg_ctl = reg;

		/* Configure the VIB ENABLE regiser */
		reg = vib_dev->reg_en_ctl;
		reg \|= (!!vib_cfg->active_low) << QPNP_VIB_LOGIC_SHIFT;
		if (vib_cfg->enable_mode == QPNP_VIB_MANUAL)
		reg \|= QPNP_VIB_EN;
		else
		reg \|= BIT(vib_cfg->enable_mode - 1);
		rc = qpnp_vib_write_u8(vib_dev, &reg, QPNP_VIB_EN_CTL(vib_dev->base));
		if (rc < 0)
		return rc;
		vib_dev->reg_en_ctl = reg;

		return rc;
		}
		EXPORT_SYMBOL(qpnp_vibrator_config);

		static int qpnp_vib_set(struct qpnp_vib *vib, int on)
		{
		int rc;
		u8 val;

		if (on) {
		val = vib->reg_vtg_ctl;
		val &= ~QPNP_VIB_VTG_SET_MASK;
		val \|= (vib->vtg_level & QPNP_VIB_VTG_SET_MASK);
		rc = qpnp_vib_write_u8(vib, &val, QPNP_VIB_VTG_CTL(vib->base));
		if (rc < 0)
		return rc;
		vib->reg_vtg_ctl = val;
		val = vib->reg_en_ctl;
		val \|= QPNP_VIB_EN;
		rc = qpnp_vib_write_u8(vib, &val, QPNP_VIB_EN_CTL(vib->base));
		if (rc < 0)
		return rc;
		vib->reg_en_ctl = val;
		} else {
		val = vib->reg_en_ctl;
		val &= ~QPNP_VIB_EN;
		rc = qpnp_vib_write_u8(vib, &val, QPNP_VIB_EN_CTL(vib->base));
		if (rc < 0)
		return rc;
		vib->reg_en_ctl = val;
		}

		return rc;
		}

		static void qpnp_vib_enable(struct timed_output_dev *dev, int value)
		{
		struct qpnp_vib *vib = container_of(dev, struct qpnp_vib,
		timed_dev);

		mutex_lock(&vib->lock);
		hrtimer_cancel(&vib->vib_timer);

		if (value == 0) {
		vib->state = 0;
		} else {
		value = (value > vib->timeout ?
		vib->timeout : value);
		vib->state = 1;
		hrtimer_start(&vib->vib_timer,
		ktime_set(value / 1000, (value % 1000) * 1000000),
		HRTIMER_MODE_REL);
		}
		mutex_unlock(&vib->lock);
		schedule_work(&vib->work);
		}

		static void qpnp_vib_update(struct work_struct *work)
		{
		struct qpnp_vib *vib = container_of(work, struct qpnp_vib,
		work);
		qpnp_vib_set(vib, vib->state);
		}

		static int qpnp_vib_get_time(struct timed_output_dev *dev)
		{
		struct qpnp_vib *vib = container_of(dev, struct qpnp_vib,
		timed_dev);

		if (hrtimer_active(&vib->vib_timer)) {
		ktime_t r = hrtimer_get_remaining(&vib->vib_timer);

		return (int)ktime_to_us(r);
		} else
		return 0;
		}

		static enum hrtimer_restart qpnp_vib_timer_func(struct hrtimer *timer)
		{
		struct qpnp_vib *vib = container_of(timer, struct qpnp_vib,
		vib_timer);

		vib->state = 0;
		schedule_work(&vib->work);

		return HRTIMER_NORESTART;
		}

		#ifdef CONFIG_PM
		static int qpnp_vibrator_suspend(struct device *dev)
		{
		struct qpnp_vib *vib = dev_get_drvdata(dev);

		hrtimer_cancel(&vib->vib_timer);
		cancel_work_sync(&vib->work);
		/* turn-off vibrator */
		qpnp_vib_set(vib, 0);

		return 0;
		}
		#endif

		static SIMPLE_DEV_PM_OPS(qpnp_vibrator_pm_ops, qpnp_vibrator_suspend, NULL);

		static int qpnp_vibrator_probe(struct spmi_device *spmi)
		{
		struct qpnp_vib *vib;
		struct resource *vib_resource;
		int rc;
		u8 val;
		u32 temp_val;

		vib = devm_kzalloc(&spmi->dev, sizeof(*vib), GFP_KERNEL);
		if (!vib)
		return -ENOMEM;

		vib->spmi = spmi;

		vib->timeout = QPNP_VIB_DEFAULT_TIMEOUT;
		rc = of_property_read_u32(spmi->dev.of_node,
		"qcom,vib-timeout-ms", &temp_val);
		if (!rc) {
		vib->timeout = temp_val;
		} else if (rc != EINVAL) {
		dev_err(&spmi->dev, "Unable to read vib timeout\n");
		return rc;
		}

		vib->vtg_level = QPNP_VIB_DEFAULT_VTG_LVL;
		rc = of_property_read_u32(spmi->dev.of_node,
		"qcom,vib-vtg-level-mV", &temp_val);
		if (!rc) {
		vib->vtg_level = temp_val;
		} else if (rc != -EINVAL) {
		dev_err(&spmi->dev, "Unable to read vtg level\n");
		return rc;
		}

		vib->vtg_level /= 100;

		vib_resource = spmi_get_resource(spmi, 0, IORESOURCE_MEM, 0);
		if (!vib_resource) {
		dev_err(&spmi->dev, "Unable to get vibrator base address\n");
		return -EINVAL;
		}
		vib->base = vib_resource->start;

		/* save the control registers values */
		rc = qpnp_vib_read_u8(vib, &val, QPNP_VIB_VTG_CTL(vib->base));
		if (rc < 0)
		return rc;
		vib->reg_vtg_ctl = val;

		rc = qpnp_vib_read_u8(vib, &val, QPNP_VIB_EN_CTL(vib->base));
		if (rc < 0)
		return rc;
		vib->reg_en_ctl = val;

		mutex_init(&vib->lock);
		INIT_WORK(&vib->work, qpnp_vib_update);

		hrtimer_init(&vib->vib_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
		vib->vib_timer.function = qpnp_vib_timer_func;

		vib->timed_dev.name = "vibrator";
		vib->timed_dev.get_time = qpnp_vib_get_time;
		vib->timed_dev.enable = qpnp_vib_enable;

		dev_set_drvdata(&spmi->dev, vib);

		rc = timed_output_dev_register(&vib->timed_dev);
		if (rc < 0)
		return rc;

		vib_dev = vib;

		return rc;
		}

		static int qpnp_vibrator_remove(struct spmi_device *spmi)
		{
		struct qpnp_vib *vib = dev_get_drvdata(&spmi->dev);

		cancel_work_sync(&vib->work);
		hrtimer_cancel(&vib->vib_timer);
		timed_output_dev_unregister(&vib->timed_dev);
		mutex_destroy(&vib->lock);

		return 0;
		}

		static struct of_device_id spmi_match_table[] = {
		{ .compatible = "qcom,qpnp-vibrator",
		},
		{}
		};

		static struct spmi_driver qpnp_vibrator_driver = {
		.driver = {
		.name = "qcom,qpnp-vibrator",
		.of_match_table = spmi_match_table,
		.pm = &qpnp_vibrator_pm_ops,
		},
		.probe = qpnp_vibrator_probe,
		.remove = __devexit_p(qpnp_vibrator_remove),
		};

		static int __init qpnp_vibrator_init(void)
		{
		return spmi_driver_register(&qpnp_vibrator_driver);
		}
		module_init(qpnp_vibrator_init);

		static void __exit qpnp_vibrator_exit(void)
		{
		return spmi_driver_unregister(&qpnp_vibrator_driver);
		}
		module_exit(qpnp_vibrator_exit);

		MODULE_DESCRIPTION("qpnp vibrator driver");
		MODULE_LICENSE("GPL v2");

include/linux/qpnp/vibrator.h

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		/* Copyright (c) 2013-2015, The Linux Foundation. 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.
		*/

		#ifndef __QPNP_VIBRATOR_H__
		#define __QPNP_VIBRATOR_H__

		enum qpnp_vib_en_mode {
		QPNP_VIB_MANUAL,
		QPNP_VIB_DTEST1,
		QPNP_VIB_DTEST2,
		QPNP_VIB_DTEST3,
		};

		struct qpnp_vib_config {
		u16 drive_mV;
		u8 active_low;
		enum qpnp_vib_en_mode enable_mode;
		};
		#if defined(CONFIG_QPNP_VIBRATOR)

		int qpnp_vibrator_config(struct qpnp_vib_config *vib_config);
		#else

		static inline int qpnp_vibrator_config(struct qpnp_vib_config *vib_config)
		{
		return -ENODEV;
		}
		#endif

		#endif /* __QPNP_VIBRATOR_H__ */