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/*
* 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);
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