// SPDX-License-Identifier: GPL-2.0+ /* * Intel OakTrail Platform support * * Copyright (C) 2010-2011 Intel Corporation * Author: Yin Kangkai ([email protected]) * * 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) … #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 … #define DRIVER_VERSION … /* * 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 … #define OT_EC_CAMERA_MASK … #define OT_EC_BT_MASK … #define OT_EC_GPS_MASK … #define OT_EC_WIFI_MASK … #define OT_EC_WWAN_MASK … #define OT_EC_TS_MASK … /* * This is the address in EC space and commands used to control LCD backlight: * * Two steps needed to change the LCD backlight: * 1. write the backlight percentage into OT_EC_BL_BRIGHTNESS_ADDRESS; * 2. write OT_EC_BL_CONTROL_ON_DATA into OT_EC_BL_CONTROL_ADDRESS. * * To read the LCD back light, just read out the value from * OT_EC_BL_BRIGHTNESS_ADDRESS. * * LCD backlight brightness range: 0 - 100 (OT_EC_BL_BRIGHTNESS_MAX) */ #define OT_EC_BL_BRIGHTNESS_ADDRESS … #define OT_EC_BL_BRIGHTNESS_MAX … #define OT_EC_BL_CONTROL_ADDRESS … #define OT_EC_BL_CONTROL_ON_DATA … static bool force; module_param(force, bool, 0); MODULE_PARM_DESC(…) …; static struct platform_device *oaktrail_device; static struct backlight_device *oaktrail_bl_device; static struct rfkill *bt_rfkill; static struct rfkill *gps_rfkill; static struct rfkill *wifi_rfkill; static struct rfkill *wwan_rfkill; /* rfkill */ static int oaktrail_rfkill_set(void *data, bool blocked) { … } static const struct rfkill_ops oaktrail_rfkill_ops = …; static struct rfkill *oaktrail_rfkill_new(char *name, enum rfkill_type type, unsigned long mask) { … } static inline void __oaktrail_rfkill_cleanup(struct rfkill *rf) { … } static void oaktrail_rfkill_cleanup(void) { … } static int oaktrail_rfkill_init(void) { … } /* backlight */ static int get_backlight_brightness(struct backlight_device *b) { … } static int set_backlight_brightness(struct backlight_device *b) { … } static const struct backlight_ops oaktrail_bl_ops = …; static int oaktrail_backlight_init(void) { … } static void oaktrail_backlight_exit(void) { … } static int oaktrail_probe(struct platform_device *pdev) { … } static struct platform_driver oaktrail_driver = …; static int dmi_check_cb(const struct dmi_system_id *id) { … } static const struct dmi_system_id oaktrail_dmi_table[] __initconst = …; MODULE_DEVICE_TABLE(dmi, oaktrail_dmi_table); static int __init oaktrail_init(void) { … } static void __exit oaktrail_cleanup(void) { … } module_init(…) …; module_exit(oaktrail_cleanup); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_VERSION(…); MODULE_LICENSE(…) …;
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