drivers: misc: Add pm8xxx based vibrator driver
This driver uses the timed output framework to
support the vibrator functionality.
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 1b1c6e6..dfbf345 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -593,6 +593,14 @@
This option enables device driver support for the vibrator
on Qualcomm PM8058 chip.
+config PMIC8XXX_VIBRATOR
+ tristate "Qualcomm Vibrator support for PMIC8XXX"
+ depends on MFD_PM8XXX && ANDROID_TIMED_OUTPUT
+ help
+ This option enables device driver support for the vibrator
+ on the PM8XXX chips. The vibrator is controlled using the
+ timed output class.
+
config PMIC8058_NFC
tristate "Qualcomm PM8058 support for Near Field Communication"
depends on PMIC8058
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 1795ecf..a38ccfd 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -58,6 +58,7 @@
obj-$(CONFIG_HAPTIC_ISA1200) += isa1200.o
obj-$(CONFIG_PMIC8058_PWM) += pmic8058-pwm.o
obj-$(CONFIG_PMIC8058_VIBRATOR) += pmic8058-vibrator.o
+obj-$(CONFIG_PMIC8XXX_VIBRATOR) += pm8xxx-vibrator.o
obj-$(CONFIG_PMIC8058_NFC) += pmic8058-nfc.o
obj-$(CONFIG_PMIC8058_UPL) += pmic8058-upl.o
obj-$(CONFIG_MSM_MEMORY_LOW_POWER_MODE_SUSPEND_DEEP_POWER_DOWN) \
diff --git a/drivers/misc/pm8xxx-vibrator.c b/drivers/misc/pm8xxx-vibrator.c
new file mode 100644
index 0000000..8aa7f72
--- /dev/null
+++ b/drivers/misc/pm8xxx-vibrator.c
@@ -0,0 +1,289 @@
+/* Copyright (c) 2010-2011, 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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/mfd/pm8xxx/core.h>
+#include <linux/mfd/pm8xxx/vibrator.h>
+
+#include "../staging/android/timed_output.h"
+
+#define VIB_DRV 0x4A
+
+#define VIB_DRV_SEL_MASK 0xf8
+#define VIB_DRV_SEL_SHIFT 0x03
+#define VIB_DRV_EN_MANUAL_MASK 0xfc
+
+#define VIB_MAX_LEVEL_mV 3100
+#define VIB_MIN_LEVEL_mV 1200
+
+struct pm8xxx_vib {
+ struct hrtimer vib_timer;
+ struct timed_output_dev timed_dev;
+ spinlock_t lock;
+ struct work_struct work;
+ struct device *dev;
+ const struct pm8xxx_vibrator_platform_data *pdata;
+ int state;
+ int level;
+ u8 reg_vib_drv;
+};
+
+/* REVISIT: just for debugging, will be removed in final working version */
+static void __dump_vib_regs(struct pm8xxx_vib *vib, char *msg)
+{
+ u8 temp;
+
+ dev_dbg(vib->dev, "%s\n", msg);
+
+ pm8xxx_readb(vib->dev->parent, VIB_DRV, &temp);
+ dev_dbg(vib->dev, "VIB_DRV - %X\n", temp);
+}
+
+static int pm8xxx_vib_read_u8(struct pm8xxx_vib *vib,
+ u8 *data, u16 reg)
+{
+ int rc;
+
+ rc = pm8xxx_readb(vib->dev->parent, reg, data);
+ if (rc < 0)
+ dev_warn(vib->dev, "Error reading pm8xxx: %X - ret %X\n",
+ reg, rc);
+
+ return rc;
+}
+
+static int pm8xxx_vib_write_u8(struct pm8xxx_vib *vib,
+ u8 data, u16 reg)
+{
+ int rc;
+
+ rc = pm8xxx_writeb(vib->dev->parent, reg, data);
+ if (rc < 0)
+ dev_warn(vib->dev, "Error writing pm8xxx: %X - ret %X\n",
+ reg, rc);
+ return rc;
+}
+
+static int pm8xxx_vib_set(struct pm8xxx_vib *vib, int on)
+{
+ int rc;
+ u8 val;
+
+ if (on) {
+ val = vib->reg_vib_drv;
+ val |= ((vib->level << VIB_DRV_SEL_SHIFT) & VIB_DRV_SEL_MASK);
+ rc = pm8xxx_vib_write_u8(vib, val, VIB_DRV);
+ if (rc < 0)
+ return rc;
+ vib->reg_vib_drv = val;
+ } else {
+ val = vib->reg_vib_drv;
+ val &= ~VIB_DRV_SEL_MASK;
+ rc = pm8xxx_vib_write_u8(vib, val, VIB_DRV);
+ if (rc < 0)
+ return rc;
+ vib->reg_vib_drv = val;
+ }
+ __dump_vib_regs(vib, "vib_set_end");
+
+ return rc;
+}
+
+static void pm8xxx_vib_enable(struct timed_output_dev *dev, int value)
+{
+ struct pm8xxx_vib *vib = container_of(dev, struct pm8xxx_vib,
+ timed_dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&vib->lock, flags);
+
+retry:
+ if (hrtimer_try_to_cancel(&vib->vib_timer) < 0) {
+ spin_unlock_irqrestore(&vib->lock, flags);
+ cpu_relax();
+ goto retry;
+ }
+
+ if (value == 0)
+ vib->state = 0;
+ else {
+ value = (value > vib->pdata->max_timeout_ms ?
+ vib->pdata->max_timeout_ms : value);
+ vib->state = 1;
+ hrtimer_start(&vib->vib_timer,
+ ktime_set(value / 1000, (value % 1000) * 1000000),
+ HRTIMER_MODE_REL);
+ }
+ spin_unlock_irqrestore(&vib->lock, flags);
+ schedule_work(&vib->work);
+}
+
+static void pm8xxx_vib_update(struct work_struct *work)
+{
+ struct pm8xxx_vib *vib = container_of(work, struct pm8xxx_vib,
+ work);
+
+ pm8xxx_vib_set(vib, vib->state);
+}
+
+static int pm8xxx_vib_get_time(struct timed_output_dev *dev)
+{
+ struct pm8xxx_vib *vib = container_of(dev, struct pm8xxx_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 pm8xxx_vib_timer_func(struct hrtimer *timer)
+{
+ struct pm8xxx_vib *vib = container_of(timer, struct pm8xxx_vib,
+ vib_timer);
+
+ vib->state = 0;
+ schedule_work(&vib->work);
+
+ return HRTIMER_NORESTART;
+}
+
+#ifdef CONFIG_PM
+static int pm8xxx_vib_suspend(struct device *dev)
+{
+ struct pm8xxx_vib *vib = dev_get_drvdata(dev);
+
+ hrtimer_cancel(&vib->vib_timer);
+ cancel_work_sync(&vib->work);
+ /* turn-off vibrator */
+ pm8xxx_vib_set(vib, 0);
+
+ return 0;
+}
+
+static const struct dev_pm_ops pm8xxx_vib_pm_ops = {
+ .suspend = pm8xxx_vib_suspend,
+};
+#endif
+
+static int __devinit pm8xxx_vib_probe(struct platform_device *pdev)
+
+{
+ const struct pm8xxx_vibrator_platform_data *pdata =
+ pdev->dev.platform_data;
+ struct pm8xxx_vib *vib;
+ u8 val;
+ int rc;
+
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->level_mV < VIB_MIN_LEVEL_mV ||
+ pdata->level_mV > VIB_MAX_LEVEL_mV)
+ return -EINVAL;
+
+ vib = kzalloc(sizeof(*vib), GFP_KERNEL);
+ if (!vib)
+ return -ENOMEM;
+
+ vib->pdata = pdata;
+ vib->level = pdata->level_mV / 100;
+ vib->dev = &pdev->dev;
+
+ spin_lock_init(&vib->lock);
+ INIT_WORK(&vib->work, pm8xxx_vib_update);
+
+ hrtimer_init(&vib->vib_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ vib->vib_timer.function = pm8xxx_vib_timer_func;
+
+ vib->timed_dev.name = "vibrator";
+ vib->timed_dev.get_time = pm8xxx_vib_get_time;
+ vib->timed_dev.enable = pm8xxx_vib_enable;
+
+ __dump_vib_regs(vib, "boot_vib_default");
+
+ /*
+ * Configure the vibrator, it operates in manual mode
+ * for timed_output framework.
+ */
+ rc = pm8xxx_vib_read_u8(vib, &val, VIB_DRV);
+ if (rc < 0)
+ goto err_read_vib;
+ val &= ~VIB_DRV_EN_MANUAL_MASK;
+ rc = pm8xxx_vib_write_u8(vib, val, VIB_DRV);
+ if (rc < 0)
+ goto err_read_vib;
+
+ vib->reg_vib_drv = val;
+
+ rc = timed_output_dev_register(&vib->timed_dev);
+ if (rc < 0)
+ goto err_read_vib;
+
+ pm8xxx_vib_enable(&vib->timed_dev, pdata->initial_vibrate_ms);
+
+ platform_set_drvdata(pdev, vib);
+
+ return 0;
+
+err_read_vib:
+ kfree(vib);
+ return rc;
+}
+
+static int __devexit pm8xxx_vib_remove(struct platform_device *pdev)
+{
+ struct pm8xxx_vib *vib = platform_get_drvdata(pdev);
+
+ cancel_work_sync(&vib->work);
+ hrtimer_cancel(&vib->vib_timer);
+ timed_output_dev_unregister(&vib->timed_dev);
+ platform_set_drvdata(pdev, NULL);
+ kfree(vib);
+
+ return 0;
+}
+
+static struct platform_driver pm8xxx_vib_driver = {
+ .probe = pm8xxx_vib_probe,
+ .remove = __devexit_p(pm8xxx_vib_remove),
+ .driver = {
+ .name = PM8XXX_VIBRATOR_DEV_NAME,
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &pm8xxx_vib_pm_ops,
+#endif
+ },
+};
+
+static int __init pm8xxx_vib_init(void)
+{
+ return platform_driver_register(&pm8xxx_vib_driver);
+}
+module_init(pm8xxx_vib_init);
+
+static void __exit pm8xxx_vib_exit(void)
+{
+ platform_driver_unregister(&pm8xxx_vib_driver);
+}
+module_exit(pm8xxx_vib_exit);
+
+MODULE_ALIAS("platform:" PM8XXX_VIBRATOR_DEV_NAME);
+MODULE_DESCRIPTION("pm8xxx vibrator driver");
+MODULE_LICENSE("GPL v2");