linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * Intel OakTrail Platform support

 *

 * Copyright (C) 2010-2011 Intel Corporation

 * Author: Yin Kangkai (kangkai.yin@intel.com)

 *

 * based on Compal driver, Copyright (C) 2008 Cezary Jackiewicz

 * <cezary.jackiewicz (at) gmail.com>, based on MSI driver

 * Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>

 *

 * This driver does below things:

 * 1. registers itself in the Linux backlight control in

 *    /sys/class/backlight/intel_oaktrail/

 *

 * 2. registers in the rfkill subsystem here: /sys/class/rfkill/rfkillX/

 *    for these components: wifi, bluetooth, wwan (3g), gps

 *

 * This driver might work on other products based on Oaktrail. If you

 * want to try it you can pass force=1 as argument to the module which

 * will force it to load even when the DMI data doesn't identify the

 * product as compatible.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/acpi.h>

#include <linux/backlight.h>

#include <linux/dmi.h>

#include <linux/err.h>

#include <linux/fb.h>

#include <linux/i2c.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/platform_device.h>

#include <linux/rfkill.h>

​

#include <acpi/video.h>

​

#define DRIVER_NAME "intel_oaktrail"

#define DRIVER_VERSION  "0.4ac1"

​

/*

 * This is the devices status address in EC space, and the control bits

 * definition:

 *

 * (1 << 0):    Camera enable/disable, RW.

 * (1 << 1):    Bluetooth enable/disable, RW.

 * (1 << 2):    GPS enable/disable, RW.

 * (1 << 3):    WiFi enable/disable, RW.

 * (1 << 4):    WWAN (3G) enable/disable, RW.

 * (1 << 5):    Touchscreen enable/disable, Read Only.

 */

#define OT_EC_DEVICE_STATE_ADDRESS  0xD6

​

#define OT_EC_CAMERA_MASK   (1 << 0)

#define OT_EC_BT_MASK       (1 << 1)

#define OT_EC_GPS_MASK      (1 << 2)

#define OT_EC_WIFI_MASK     (1 << 3)

#define OT_EC_WWAN_MASK     (1 << 4)

#define OT_EC_TS_MASK       (1 << 5)

​