1 files changed, 154 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-espresso-vibrator.c b/arch/arm/mach-omap2/board-espresso-vibrator.c
new file mode 100644
index 0000000..6429a82
--- /dev/null
+++ b/arch/arm/mach-omap2/board-espresso-vibrator.c
@@ -0,0 +1,154 @@
+/* arch/arm/mach-omap2/board-espresso-vibrator.c
+ *
+ * Copyright (C) 2012 Samsung Electronics Co. Ltd. All Rights Reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/hrtimer.h>
+#include <linux/gpio.h>
+#include <linux/wakelock.h>
+#include <linux/mutex.h>
+#include <asm/mach-types.h>
+
+#include <../../../drivers/staging/android/timed_output.h>
+
+#include "mux.h"
+#include "board-espresso.h"
+
+#define GPIO_MOTOR_EN	38
+
+#define MAX_TIMEOUT		10000 /* 10sec */
+
+static struct vibrator {
+	struct wake_lock wklock;
+	struct hrtimer timer;
+	struct mutex lock;
+	bool enabled;
+} vibdata;
+
+static void vibrator_off(void)
+{
+	if (!vibdata.enabled)
+		return;
+	gpio_set_value(GPIO_MOTOR_EN, 0);
+	vibdata.enabled = false;
+	wake_unlock(&vibdata.wklock);
+}
+
+static int vibrator_get_time(struct timed_output_dev *dev)
+{
+	if (hrtimer_active(&vibdata.timer)) {
+		ktime_t r = hrtimer_get_remaining(&vibdata.timer);
+		return ktime_to_ms(r);
+	}
+
+	return 0;
+}
+
+static void vibrator_enable(struct timed_output_dev *dev, int value)
+{
+	mutex_lock(&vibdata.lock);
+
+	/* cancel previous timer and set GPIO according to value */
+	hrtimer_cancel(&vibdata.timer);
+
+	if (value) {
+		wake_lock(&vibdata.wklock);
+
+		gpio_set_value(GPIO_MOTOR_EN, 1);
+
+		vibdata.enabled = true;
+
+		if (value > 0) {
+			if (value > MAX_TIMEOUT)
+				value = MAX_TIMEOUT;
+
+			hrtimer_start(&vibdata.timer,
+				ns_to_ktime((u64)value * NSEC_PER_MSEC),
+				HRTIMER_MODE_REL);
+		}
+	} else {
+		vibrator_off();
+	}
+
+	mutex_unlock(&vibdata.lock);
+}
+
+static struct timed_output_dev to_dev = {
+	.name		= "vibrator",
+	.get_time	= vibrator_get_time,
+	.enable		= vibrator_enable,
+};
+
+static enum hrtimer_restart vibrator_timer_func(struct hrtimer *timer)
+{
+	vibrator_off();
+	return HRTIMER_NORESTART;
+}
+
+static void __init omap_vibrator_none_pads_cfg_mux(void)
+{
+	omap_mux_write(omap_mux_get("core"),
+		OMAP_MUX_MODE7 | OMAP_PIN_INPUT_PULLDOWN,
+		OMAP4_CTRL_MODULE_PAD_GPMC_AD14_OFFSET);
+}
+
+static int __init vibrator_init(void)
+{
+	int ret;
+
+	vibdata.enabled = false;
+
+	hrtimer_init(&vibdata.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	vibdata.timer.function = vibrator_timer_func;
+
+	wake_lock_init(&vibdata.wklock, WAKE_LOCK_SUSPEND, "vibrator");
+	mutex_init(&vibdata.lock);
+
+	ret = timed_output_dev_register(&to_dev);
+	if (ret < 0)
+		goto err_to_dev_reg;
+
+	return 0;
+
+err_to_dev_reg:
+	mutex_destroy(&vibdata.lock);
+	wake_lock_destroy(&vibdata.wklock);
+
+	return -1;
+}
+
+int __init omap4_espresso_vibrator_init(void)
+{
+	int ret;
+
+	if (!board_has_modem()) {
+		omap_vibrator_none_pads_cfg_mux();
+		return 0;
+	}
+
+	gpio_request_one(GPIO_MOTOR_EN, GPIOF_OUT_INIT_LOW, "MOTOR_EN");
+
+	ret = vibrator_init();
+	if (ret < 0) {
+		pr_err("vib: vibrator_init fail.");
+		gpio_free(GPIO_MOTOR_EN);
+	}
+
+	return ret;
+}
+
+/*
+ * This is needed because the vibrator is dependent on omap_dm_timers which get
+ * initialized at device_init time
+ */
+late_initcall(omap4_espresso_vibrator_init);