diff mbox

HID: TWL4030: add HID Force Feedback vibra

Message ID 1266409336-24146-1-git-send-email-ext-jari.vanhala@nokia.com
State New, archived
Delegated to: Jiri Kosina
Headers show

Commit Message

Jari Vanhala Feb. 17, 2010, 12:22 p.m. UTC
None
diff mbox

Patch

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@nokia.com>
+ * Updates by Felipe Balbi <felipe.balbi@nokia.com>
+ * HID by Jari Vanhala <ext-jari.vanhala@nokia.com>
+ *
+ * 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, &reg, 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,
+			&reg, 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,
+			&reg, 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,
+			&reg, 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,
+				&reg, 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");