TWL4030 Vibrator implemented via HID Force Feedback
interface. This uses MFD TWL4030 codec and own workqueue.
Signed-off-by: Jari Vanhala <ext-jari.vanhala@xxxxxxxxx>
---
drivers/hid/Kconfig | 8 +
drivers/hid/Makefile | 1 +
drivers/hid/hid-twl4030-vibra.c | 292 +++++++++++++++++++++++++++++++++++++++
3 files changed, 301 insertions(+), 0 deletions(-)
create mode 100644 drivers/hid/hid-twl4030-vibra.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 71d4c07..9bb4e0a 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -372,6 +372,14 @@ config ZEROPLUS_FF
Say Y here if you have a Zeroplus based game controller and want
to have force feedback support for it.
+config HID_TWL4030_VIBRA
+ tristate "HID Support for TWL4030 Vibrator"
+ depends on TWL4030_CORE
+ select TWL4030_CODEC
+ select INPUT_FF_MEMLESS
+ ---help---
+ This option enables support for TWL4030 Vibrator Driver.
+
endmenu
endif # HID_SUPPORT
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 0b2618f..192cde6 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_HID_TOPSEED) += hid-topseed.o
obj-$(CONFIG_HID_TWINHAN) += hid-twinhan.o
obj-$(CONFIG_HID_ZEROPLUS) += hid-zpff.o
obj-$(CONFIG_HID_WACOM) += hid-wacom.o
+obj-$(CONFIG_HID_TWL4030_VIBRA) += hid-twl4030-vibra.o
obj-$(CONFIG_USB_HID) += usbhid/
obj-$(CONFIG_USB_MOUSE) += usbhid/
diff --git a/drivers/hid/hid-twl4030-vibra.c b/drivers/hid/hid-twl4030-vibra.c
new file mode 100644
index 0000000..1009dfb
--- /dev/null
+++ b/drivers/hid/hid-twl4030-vibra.c
@@ -0,0 +1,292 @@
+/*
+ * hid-twl4030-vibra.c - TWL4030 Vibrator driver
+ *
+ * Copyright (C) 2008-2010 Nokia Corporation
+ *
+ * Written by Henrik Saari <henrik.saari@xxxxxxxxx>
+ * Updates by Felipe Balbi <felipe.balbi@xxxxxxxxx>
+ * HID by Jari Vanhala <ext-jari.vanhala@xxxxxxxxx>
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/i2c/twl.h>
+#include <linux/mfd/twl4030-codec.h>
+
+#include <linux/hid.h>
+#include <linux/input.h>
+
+/* MODULE ID2 */
+#define LEDEN 0x00
+
+/* ForceFeedback */
+#define EFFECT_DIR_180_DEG 0x8000 /* range is 0 - 0xFFFF */
+
+struct vibra_info {
+ struct device *dev;
+ struct input_dev *input_dev;
+
+ struct workqueue_struct *workqueue;
+ struct work_struct play_work;
+
+ int enabled;
+ int speed;
+ int direction;
+
+ int coexist;
+};
+
+static void vibra_disable_leds(void)
+{
+ u8 reg;
+
+ /* Disable LEDA & LEDB, cannot be used with vibra (PWM) */
+ twl_i2c_read_u8(TWL4030_MODULE_LED, ®, LEDEN);
+ reg &= ~0x03;
+ twl_i2c_write_u8(TWL4030_MODULE_LED, LEDEN, reg);
+}
+
+/* Powers H-Bridge and enables audio clk */
+static void vibra_enable(struct vibra_info *info)
+{
+ u8 reg;
+
+ twl4030_codec_enable_resource(TWL4030_CODEC_RES_POWER);
+
+ /* turn H-Bridge on */
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
+ ®, TWL4030_REG_VIBRA_CTL);
+ twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+ (reg | TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
+
+ twl4030_codec_enable_resource(TWL4030_CODEC_RES_APLL);
+
+ info->enabled = 1;
+}
+
+static void vibra_disable(struct vibra_info *info)
+{
+ u8 reg;
+
+ /* Power down H-Bridge */
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
+ ®, TWL4030_REG_VIBRA_CTL);
+ twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+ (reg & ~TWL4030_VIBRA_EN), TWL4030_REG_VIBRA_CTL);
+
+ twl4030_codec_disable_resource(TWL4030_CODEC_RES_POWER);
+ twl4030_codec_disable_resource(TWL4030_CODEC_RES_APLL);
+
+ info->enabled = 0;
+}
+
+static void vibra_play_work(struct work_struct *work)
+{
+ struct vibra_info *info = container_of(work,
+ struct vibra_info, play_work);
+ int dir;
+ int pwm;
+ u8 reg;
+
+ dir = info->direction;
+ pwm = info->speed;
+
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
+ ®, TWL4030_REG_VIBRA_CTL);
+ if (pwm && (!info->coexist || !(reg & TWL4030_VIBRA_SEL))) {
+
+ if (!info->enabled)
+ vibra_enable(info);
+
+ /* set vibra rotation direction */
+ twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
+ ®, TWL4030_REG_VIBRA_CTL);
+ reg = (dir) ? (reg | TWL4030_VIBRA_DIR) :
+ (reg & ~TWL4030_VIBRA_DIR);
+ twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+ reg, TWL4030_REG_VIBRA_CTL);
+
+ /* set PWM, 1 = max, 255 = min */
+ twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+ 256 - pwm, TWL4030_REG_VIBRA_SET);
+ } else {
+ if (info->enabled)
+ vibra_disable(info);
+ }
+}
+
+/*** ForceFeedback ***/
+
+static int vibra_play(struct input_dev *dev, void *data,
+ struct ff_effect *effect)
+{
+ struct vibra_info *info = data;
+
+ if (!info->workqueue)
+ return 0;
+
+ info->speed = effect->u.rumble.strong_magnitude >> 8;
+ if (!info->speed)
+ info->speed = effect->u.rumble.weak_magnitude >> 9;
+ info->direction = effect->direction < EFFECT_DIR_180_DEG ? 0 : 1;
+ queue_work(info->workqueue, &info->play_work);
+
+ return 0;
+}
+
+/*** Module ***/
+#if CONFIG_PM
+static int twl4030_vibra_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ struct vibra_info *info = platform_get_drvdata(pdev);
+
+ if (info->enabled)
+ vibra_disable(info);
+
+ return 0;
+}
+
+static void twl4030_vibra_shutdown(struct platform_device *pdev)
+{
+ struct vibra_info *info = platform_get_drvdata(pdev);
+
+ if (info->enabled)
+ vibra_disable(info);
+}
+
+static int twl4030_vibra_resume(struct platform_device *pdev)
+{
+ vibra_disable_leds();
+ return 0;
+}
+#else
+#define twl4030_vibra_suspend NULL
+#define twl4030_vibra_shutdown NULL
+#define twl4030_vibra_resume NULL
+#endif
+
+static int __devinit twl4030_vibra_probe(struct platform_device *pdev)
+{
+ struct twl4030_codec_vibra_data *pdata = pdev->dev.platform_data;
+ struct vibra_info *info;
+ int ret;
+
+ if (!pdata) {
+ dev_dbg(&pdev->dev, "platform_data not available\n");
+ return -EINVAL;
+ }
+
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->enabled = 0;
+ info->coexist = pdata->coexist;
+
+ platform_set_drvdata(pdev, info);
+
+ info->workqueue = create_singlethread_workqueue("vibra");
+ if (info->workqueue == NULL) {
+ dev_err(&pdev->dev, "couldn't create workqueue\n");
+ kfree(info);
+ return -ENOMEM;
+ }
+ INIT_WORK(&info->play_work, vibra_play_work);
+
+ info->input_dev = input_allocate_device();
+ if (info->input_dev == NULL) {
+ dev_err(&pdev->dev, "couldn't allocate input device\n");
+ kfree(info);
+ return -ENOMEM;
+ }
+ input_set_drvdata(info->input_dev, info);
+
+ info->input_dev->name = "twl4030:vibrator";
+ info->input_dev->id.version = 1;
+ info->input_dev->dev.parent = pdev->dev.parent;
+ set_bit(FF_RUMBLE, info->input_dev->ffbit);
+
+ ret = input_register_device(info->input_dev);
+ if (ret < 0) {
+ dev_dbg(&pdev->dev, "couldn't register input device\n");
+ input_free_device(info->input_dev);
+ kfree(info);
+ return ret;
+ }
+
+ ret = input_ff_create_memless(info->input_dev, info, vibra_play);
+ if (ret < 0) {
+ dev_dbg(&pdev->dev, "couldn't register vibrator to FF\n");
+ input_unregister_device(info->input_dev);
+ kfree(info);
+ return ret;
+ }
+
+ vibra_disable_leds();
+
+ return 0;
+}
+
+static int __devexit twl4030_vibra_remove(struct platform_device *pdev)
+{
+ struct vibra_info *info = platform_get_drvdata(pdev);
+
+ cancel_work_sync(&info->play_work);
+ destroy_workqueue(info->workqueue);
+ info->workqueue = NULL;
+ if (info->enabled)
+ vibra_disable(info);
+ /* this also free ff-memless which (in turn) kfree info */
+ input_unregister_device(info->input_dev);
+
+ return 0;
+}
+
+static struct platform_driver twl4030_vibra_driver = {
+ .probe = twl4030_vibra_probe,
+ .remove = __devexit_p(twl4030_vibra_remove),
+ .suspend = twl4030_vibra_suspend,
+ .resume = twl4030_vibra_resume,
+ .shutdown = twl4030_vibra_shutdown,
+ .driver = {
+ .name = "twl4030_codec_vibra",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init twl4030_vibra_init(void)
+{
+ return platform_driver_register(&twl4030_vibra_driver);
+}
+module_init(twl4030_vibra_init);
+
+static void __exit twl4030_vibra_exit(void)
+{
+ platform_driver_unregister(&twl4030_vibra_driver);
+}
+module_exit(twl4030_vibra_exit);
+
+MODULE_ALIAS("platform:twl4030_codec_vibra");
+
+MODULE_DESCRIPTION("HID TWL4030 Vibra driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Nokia Corporation");
--
1.6.3.3
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