lkml.org 
[lkml]   [2018]   [Oct]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/3] Input: add new vibrator driver for various MSM SOCs
Date
This patch adds a new vibrator driver that supports various Qualcomm
MSM SOCs. Driver was tested on a LG Nexus 5 (hammerhead) phone.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
drivers/input/misc/Kconfig | 10 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/msm-vibrator.c | 276 ++++++++++++++++++++++++++++++
3 files changed, 287 insertions(+)
create mode 100644 drivers/input/misc/msm-vibrator.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index ca59a2be9bc5..e39aef84f357 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -117,6 +117,16 @@ config INPUT_E3X0_BUTTON
To compile this driver as a module, choose M here: the
module will be called e3x0_button.

+config INPUT_MSM_VIBRATOR
+ tristate "Qualcomm MSM vibrator driver"
+ select INPUT_FF_MEMLESS
+ help
+ Support for the vibrator that is found on various Qualcomm MSM
+ SOCs.
+
+ To compile this driver as a module, choose M here: the module
+ will be called msm_vibrator.
+
config INPUT_PCSPKR
tristate "PC Speaker support"
depends on PCSPKR_PLATFORM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 9d0f9d1ff68f..96a6419cb1f2 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_INPUT_MAX8925_ONKEY) += max8925_onkey.o
obj-$(CONFIG_INPUT_MAX8997_HAPTIC) += max8997_haptic.o
obj-$(CONFIG_INPUT_MC13783_PWRBUTTON) += mc13783-pwrbutton.o
obj-$(CONFIG_INPUT_MMA8450) += mma8450.o
+obj-$(CONFIG_INPUT_MSM_VIBRATOR) += msm-vibrator.o
obj-$(CONFIG_INPUT_PALMAS_PWRBUTTON) += palmas-pwrbutton.o
obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o
obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.o
diff --git a/drivers/input/misc/msm-vibrator.c b/drivers/input/misc/msm-vibrator.c
new file mode 100644
index 000000000000..bb862f30a780
--- /dev/null
+++ b/drivers/input/misc/msm-vibrator.c
@@ -0,0 +1,276 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Qualcomm MSM vibrator driver
+ *
+ * Copyright (c) 2018 Brian Masney <masneyb@onstation.org>
+ *
+ * Based on qcom,pwm-vibrator.c from:
+ * Copyright (c) 2018 Jonathan Marek <jonathan@marek.ca>
+ *
+ * Based on msm_pwm_vibrator.c from downstream Android sources:
+ * Copyright (C) 2009-2014 LGE, Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/input.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#define REG_CMD_RCGR 0x00
+#define REG_CFG_RCGR 0x04
+#define REG_M 0x08
+#define REG_N 0x0C
+#define REG_D 0x10
+#define REG_CBCR 0x24
+#define MMSS_CC_M_DEFAULT 1
+
+struct msm_vibrator {
+ struct input_dev *input;
+ struct mutex mutex;
+ struct work_struct worker;
+ void __iomem *base;
+ struct regulator *vcc;
+ struct clk *clk;
+ struct gpio_desc *enable_gpio;
+ u16 magnitude;
+ bool enabled;
+};
+
+#define msm_vibrator_write(msm_vibrator, offset, value) \
+ writel((value), (void __iomem *)((msm_vibrator)->base + (offset)))
+
+static int msm_vibrator_start(struct msm_vibrator *vibrator)
+{
+ int d_reg_val, ret = 0;
+
+ mutex_lock(&vibrator->mutex);
+
+ if (!vibrator->enabled) {
+ ret = clk_set_rate(vibrator->clk, 24000);
+ if (ret) {
+ dev_err(&vibrator->input->dev,
+ "Failed to set clock rate: %d\n", ret);
+ goto unlock;
+ }
+
+ ret = clk_prepare_enable(vibrator->clk);
+ if (ret) {
+ dev_err(&vibrator->input->dev,
+ "Failed to enable clock: %d\n", ret);
+ goto unlock;
+ }
+
+ ret = regulator_enable(vibrator->vcc);
+ if (ret) {
+ dev_err(&vibrator->input->dev,
+ "Failed to enable regulator: %d\n", ret);
+ clk_disable(vibrator->clk);
+ goto unlock;
+ }
+
+ gpiod_set_value_cansleep(vibrator->enable_gpio, 1);
+
+ vibrator->enabled = true;
+ }
+
+ d_reg_val = 127 - ((126 * vibrator->magnitude) / 0xffff);
+ msm_vibrator_write(vibrator, REG_CFG_RCGR,
+ (2 << 12) | /* dual edge mode */
+ (0 << 8) | /* cxo */
+ (7 << 0));
+ msm_vibrator_write(vibrator, REG_M, 1);
+ msm_vibrator_write(vibrator, REG_N, 128);
+ msm_vibrator_write(vibrator, REG_D, d_reg_val);
+ msm_vibrator_write(vibrator, REG_CMD_RCGR, 1);
+ msm_vibrator_write(vibrator, REG_CBCR, 1);
+
+unlock:
+ mutex_unlock(&vibrator->mutex);
+
+ return ret;
+}
+
+static void msm_vibrator_stop(struct msm_vibrator *vibrator)
+{
+ mutex_lock(&vibrator->mutex);
+
+ if (vibrator->enabled) {
+ gpiod_set_value_cansleep(vibrator->enable_gpio, 0);
+ regulator_disable(vibrator->vcc);
+ clk_disable(vibrator->clk);
+ vibrator->enabled = false;
+ }
+
+ mutex_unlock(&vibrator->mutex);
+}
+
+static void msm_vibrator_worker(struct work_struct *work)
+{
+ struct msm_vibrator *vibrator = container_of(work,
+ struct msm_vibrator,
+ worker);
+
+ if (vibrator->magnitude)
+ msm_vibrator_start(vibrator);
+ else
+ msm_vibrator_stop(vibrator);
+}
+
+static int msm_vibrator_play_effect(struct input_dev *dev, void *data,
+ struct ff_effect *effect)
+{
+ struct msm_vibrator *vibrator = input_get_drvdata(dev);
+
+ mutex_lock(&vibrator->mutex);
+
+ if (effect->u.rumble.strong_magnitude > 0)
+ vibrator->magnitude = effect->u.rumble.strong_magnitude;
+ else
+ vibrator->magnitude = effect->u.rumble.weak_magnitude;
+
+ mutex_unlock(&vibrator->mutex);
+
+ schedule_work(&vibrator->worker);
+
+ return 0;
+}
+
+static void msm_vibrator_close(struct input_dev *input)
+{
+ struct msm_vibrator *vibrator = input_get_drvdata(input);
+
+ cancel_work_sync(&vibrator->worker);
+ msm_vibrator_stop(vibrator);
+}
+
+static int msm_vibrator_probe(struct platform_device *pdev)
+{
+ struct msm_vibrator *vibrator;
+ struct resource *res;
+ int ret;
+
+ vibrator = devm_kzalloc(&pdev->dev, sizeof(*vibrator), GFP_KERNEL);
+ if (!vibrator)
+ return -ENOMEM;
+
+ vibrator->input = devm_input_allocate_device(&pdev->dev);
+ if (!vibrator->input)
+ return -ENOMEM;
+
+ vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc");
+ if (IS_ERR(vibrator->vcc)) {
+ if (PTR_ERR(vibrator->vcc) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to get regulator: %ld\n",
+ PTR_ERR(vibrator->vcc));
+ return PTR_ERR(vibrator->vcc);
+ }
+
+ vibrator->enable_gpio = devm_gpiod_get(&pdev->dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(vibrator->enable_gpio)) {
+ dev_err(&pdev->dev, "Failed to get enable gpio: %ld\n",
+ PTR_ERR(vibrator->enable_gpio));
+ return PTR_ERR(vibrator->enable_gpio);
+ }
+
+ vibrator->clk = devm_clk_get(&pdev->dev, "pwm");
+ if (IS_ERR(vibrator->clk)) {
+ dev_err(&pdev->dev, "Failed to lookup pwm clock: %ld\n",
+ PTR_ERR(vibrator->clk));
+ return PTR_ERR(vibrator->clk);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get platform resource\n");
+ return -ENODEV;
+ }
+
+ vibrator->base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (IS_ERR(vibrator->base)) {
+ dev_err(&pdev->dev, "Failed to iomap resource: %ld\n",
+ PTR_ERR(vibrator->base));
+ return PTR_ERR(vibrator->base);
+ }
+
+ vibrator->enabled = false;
+ mutex_init(&vibrator->mutex);
+ INIT_WORK(&vibrator->worker, msm_vibrator_worker);
+
+ vibrator->input->name = "msm-vibrator";
+ vibrator->input->id.bustype = BUS_HOST;
+ vibrator->input->dev.parent = &pdev->dev;
+ vibrator->input->close = msm_vibrator_close;
+
+ input_set_drvdata(vibrator->input, vibrator);
+ input_set_capability(vibrator->input, EV_FF, FF_RUMBLE);
+
+ ret = input_ff_create_memless(vibrator->input, NULL,
+ msm_vibrator_play_effect);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to create ff memless: %d", ret);
+ return ret;
+ }
+
+ ret = input_register_device(vibrator->input);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register input device: %d", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, vibrator);
+
+ return 0;
+}
+
+static int __maybe_unused msm_vibrator_suspend(struct device *dev)
+{
+ struct msm_vibrator *vibrator = dev_get_drvdata(dev);
+
+ cancel_work_sync(&vibrator->worker);
+
+ if (vibrator->enabled)
+ msm_vibrator_stop(vibrator);
+
+ return 0;
+}
+
+static int __maybe_unused msm_vibrator_resume(struct device *dev)
+{
+ struct msm_vibrator *vibrator = dev_get_drvdata(dev);
+
+ if (vibrator->enabled)
+ msm_vibrator_start(vibrator);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(msm_vibrator_pm_ops, msm_vibrator_suspend,
+ msm_vibrator_resume);
+
+static const struct of_device_id msm_vibrator_of_match[] = {
+ { .compatible = "qcom,msm8226-vibrator" },
+ { .compatible = "qcom,msm8974-vibrator" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, msm_vibrator_of_match);
+
+static struct platform_driver msm_vibrator_driver = {
+ .probe = msm_vibrator_probe,
+ .driver = {
+ .name = "msm-vibrator",
+ .pm = &msm_vibrator_pm_ops,
+ .of_match_table = of_match_ptr(msm_vibrator_of_match),
+ },
+};
+module_platform_driver(msm_vibrator_driver);
+
+MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
+MODULE_DESCRIPTION("Qualcomm MSM vibrator driver");
+MODULE_LICENSE("GPL");
--
2.17.2
\
 
 \ /
  Last update: 2018-10-25 03:31    [W:0.078 / U:12.496 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site