Merge branch 'android-omap-minnow-3.10-lollipop-wear-release' of https://android.googlesource.com/kernel/omap into mattis_devmattis_dev

Change-Id: I46165dd7747b9b6289eb44cb96cbef2de46c10ba

1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/mfd/m4sensorhub-extern.c b/drivers/mfd/m4sensorhub-extern.c
new file mode 100644
index 00000000000..771dc5cc4f3
--- /dev/null
+++ b/drivers/mfd/m4sensorhub-extern.c
@@ -0,0 +1,158 @@
+/*
+ *  Copyright (C) 2014 Motorola, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Adds ability to program periodic interrupts from user space that
+ *  can wake the phone out of low power modes.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/m4sensorhub.h>
+#include <linux/slab.h>
+
+#define m4ext_err(format, args...)  KDEBUG(M4SH_ERROR, format, ## args)
+
+struct m4sensorhub_data *m4ext_m4;
+DEFINE_MUTEX(m4ext_mutex);
+uint8_t m4ext_display_status;
+uint8_t m4ext_audio_status;
+
+static void m4ext_panic_callback(struct m4sensorhub_data *m4, void *context)
+{
+	int err;
+
+	mutex_lock(&m4ext_mutex);
+
+	if (m4ext_m4 == NULL) {
+		m4ext_err("%s: M4 data is NULL.\n", __func__);
+		err = -ENODATA;
+		goto m4ext_panic_callback_fail;
+	}
+
+	err = m4sensorhub_reg_write(m4, M4SH_REG_USERSETTINGS_SCREENSTATUS,
+		(char *)&m4ext_display_status, m4sh_no_mask);
+	if (err < 0)
+		m4ext_err("%s: Screen status write failed (%d).\n",
+			__func__, err);
+	else if (err != 1)
+		m4ext_err("%s: Screen status wrote %d bytes instead of 1.\n",
+			__func__, err);
+
+	err = m4sensorhub_reg_write(m4, M4SH_REG_USERSETTINGS_AUDIOSTATUS,
+		(char *)&m4ext_audio_status, m4sh_no_mask);
+	if (err < 0)
+		m4ext_err("%s: Audio status write failed (%d).\n",
+			__func__, err);
+	else if (err != 1)
+		m4ext_err("%s: Audio status wrote %d bytes instead of 1.\n",
+			__func__, err);
+
+m4ext_panic_callback_fail:
+	mutex_unlock(&m4ext_mutex);
+	return;
+}
+
+int m4sensorhub_extern_init(struct m4sensorhub_data *m4)
+{
+	int err;
+
+	mutex_lock(&m4ext_mutex);
+
+	err = m4sensorhub_panic_register(m4, PANICHDL_EXTERN_RESTORE,
+		m4ext_panic_callback, NULL);
+	if (err < 0) {
+		m4ext_err("%s: Failed to register panic callback.\n", __func__);
+		goto m4sensorhub_extern_init_fail;
+	}
+
+	m4ext_m4 = m4;
+
+m4sensorhub_extern_init_fail:
+	mutex_unlock(&m4ext_mutex);
+	return err;
+}
+EXPORT_SYMBOL_GPL(m4sensorhub_extern_init);
+
+int m4sensorhub_extern_set_display_status(uint8_t status)
+{
+	int err;
+
+	mutex_lock(&m4ext_mutex);
+
+	if (m4ext_m4 == NULL) {
+		m4ext_err("%s: M4 data is NULL.\n", __func__);
+		err = -ENODATA;
+		goto m4sensorhub_extern_set_display_status_fail;
+	}
+
+	m4ext_display_status = status;
+
+	err = m4sensorhub_reg_write(m4ext_m4,
+		M4SH_REG_USERSETTINGS_SCREENSTATUS,
+		(char *)&status, m4sh_no_mask);
+	if (err < 0) {
+		m4ext_err("%s: I2C write failed (%d).\n", __func__, err);
+		goto m4sensorhub_extern_set_display_status_fail;
+	} else if (err != 1) {
+		m4ext_err("%s: Wrote %d bytes instead of 1.\n", __func__, err);
+		err = -EINVAL;
+		goto m4sensorhub_extern_set_display_status_fail;
+	}
+
+	err = 0;
+
+m4sensorhub_extern_set_display_status_fail:
+	mutex_unlock(&m4ext_mutex);
+	return err;
+}
+EXPORT_SYMBOL_GPL(m4sensorhub_extern_set_display_status);
+
+int m4sensorhub_extern_set_audio_status(uint8_t status)
+{
+	int err;
+
+	mutex_lock(&m4ext_mutex);
+
+	if (m4ext_m4 == NULL) {
+		m4ext_err("%s: M4 data is NULL.\n", __func__);
+		err = -ENODATA;
+		goto m4sensorhub_extern_set_audio_status_fail;
+	}
+
+	m4ext_audio_status = status;
+
+	err = m4sensorhub_reg_write(m4ext_m4,
+		M4SH_REG_USERSETTINGS_AUDIOSTATUS,
+		(char *)&status, m4sh_no_mask);
+	if (err < 0) {
+		m4ext_err("%s: I2C write failed (%d).\n", __func__, err);
+		goto m4sensorhub_extern_set_audio_status_fail;
+	} else if (err != 1) {
+		m4ext_err("%s: Wrote %d bytes instead of 1.\n", __func__, err);
+		err = -EINVAL;
+		goto m4sensorhub_extern_set_audio_status_fail;
+	}
+
+	err = 0;
+
+m4sensorhub_extern_set_audio_status_fail:
+	mutex_unlock(&m4ext_mutex);
+	return err;
+}
+EXPORT_SYMBOL_GPL(m4sensorhub_extern_set_audio_status);