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Commit 143a4c02 authored by Lee, Chun-Yi's avatar Lee, Chun-Yi Committed by Matthew Garrett
Browse files

msi-laptop: send out touchpad on/off key 



MSI BIOS's raw behavior is send out KEY_TOUCHPAD_TOGGLE key when user
pressed touchpad hotkey.

Actually, we can capture the real touchpad status by read 0xE4 EC address
on MSI netbook/notebook. So, add msi-laptop input device for send out
KEY_TOUCHPAD_ON or KEY_TOUCHPAD_OFF key when user pressed Fn+F3 touchpad
hotkey. It leave userland applications to know the real touchpad status.

Tested on MSI netbook U-100, U-115, U160(N051), U160DX, N014, N034
Tested on MSI notebook CR620

Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: default avatarLee, Chun-Yi <jlee@novell.com>
Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
parent 8941178e

drivers/platform/x86/msi-laptop.c

+79 −2
Original line number Diff line number Diff line
@@ -60,6 +60,8 @@ 
#include <linux/platform_device.h>

#include <linux/rfkill.h>

#include <linux/i8042.h>

#include <linux/input.h>

#include <linux/input/sparse-keymap.h>



#define MSI_DRIVER_VERSION "0.5"
@@ -78,6 +80,9 @@ 
#define MSI_STANDARD_EC_SCM_LOAD_ADDRESS	0x2d

#define MSI_STANDARD_EC_SCM_LOAD_MASK		(1 << 0)



#define MSI_STANDARD_EC_TOUCHPAD_ADDRESS	0xe4

#define MSI_STANDARD_EC_TOUCHPAD_MASK		(1 << 4)



static int msi_laptop_resume(struct platform_device *device);



#define MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS	0x2f
@@ -90,6 +95,14 @@ static int auto_brightness; 
module_param(auto_brightness, int, 0);

MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");



static const struct key_entry msi_laptop_keymap[] = {

	{KE_KEY, KEY_TOUCHPAD_ON, {KEY_TOUCHPAD_ON} },	/* Touch Pad On */

	{KE_KEY, KEY_TOUCHPAD_OFF, {KEY_TOUCHPAD_OFF} },/* Touch Pad On */

	{KE_END, 0}

};



static struct input_dev *msi_laptop_input_dev;



static bool old_ec_model;

static int wlan_s, bluetooth_s, threeg_s;

static int threeg_exists;
@@ -605,6 +618,21 @@ static void msi_update_rfkill(struct work_struct *ignored) 
}

static DECLARE_DELAYED_WORK(msi_rfkill_work, msi_update_rfkill);



static void msi_send_touchpad_key(struct work_struct *ignored)

{

	u8 rdata;

	int result;



	result = ec_read(MSI_STANDARD_EC_TOUCHPAD_ADDRESS, &rdata);

	if (result < 0)

		return;



	sparse_keymap_report_event(msi_laptop_input_dev,

		(rdata & MSI_STANDARD_EC_TOUCHPAD_MASK) ?

		KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF, 1, true);

}

static DECLARE_DELAYED_WORK(msi_touchpad_work, msi_send_touchpad_key);



static bool msi_laptop_i8042_filter(unsigned char data, unsigned char str,

				struct serio *port)

{
@@ -613,12 +641,17 @@ static bool msi_laptop_i8042_filter(unsigned char data, unsigned char str, 
	if (str & 0x20)

		return false;



	/* 0x54 wwan, 0x62 bluetooth, 0x76 wlan*/

	/* 0x54 wwan, 0x62 bluetooth, 0x76 wlan, 0xE4 touchpad toggle*/

	if (unlikely(data == 0xe0)) {

		extended = true;

		return false;

	} else if (unlikely(extended)) {

		extended = false;

		switch (data) {

		case 0xE4:

			schedule_delayed_work(&msi_touchpad_work,

				round_jiffies_relative(0.5 * HZ));

			break;

		case 0x54:

		case 0x62:

		case 0x76:
@@ -626,7 +659,6 @@ static bool msi_laptop_i8042_filter(unsigned char data, unsigned char str, 
				round_jiffies_relative(0.5 * HZ));

			break;

		}

		extended = false;

	}



	return false;
@@ -731,6 +763,42 @@ static int msi_laptop_resume(struct platform_device *device) 
	return 0;

}



static int __init msi_laptop_input_setup(void)

{

	int err;



	msi_laptop_input_dev = input_allocate_device();

	if (!msi_laptop_input_dev)

		return -ENOMEM;



	msi_laptop_input_dev->name = "MSI Laptop hotkeys";

	msi_laptop_input_dev->phys = "msi-laptop/input0";

	msi_laptop_input_dev->id.bustype = BUS_HOST;



	err = sparse_keymap_setup(msi_laptop_input_dev,

		msi_laptop_keymap, NULL);

	if (err)

		goto err_free_dev;



	err = input_register_device(msi_laptop_input_dev);

	if (err)

		goto err_free_keymap;



	return 0;



err_free_keymap:

	sparse_keymap_free(msi_laptop_input_dev);

err_free_dev:

	input_free_device(msi_laptop_input_dev);

	return err;

}



static void msi_laptop_input_destroy(void)

{

	sparse_keymap_free(msi_laptop_input_dev);

	input_unregister_device(msi_laptop_input_dev);

}



static int load_scm_model_init(struct platform_device *sdev)

{

	u8 data;
@@ -759,6 +827,11 @@ static int load_scm_model_init(struct platform_device *sdev) 
	if (result < 0)

		goto fail_rfkill;



	/* setup input device */

	result = msi_laptop_input_setup();

	if (result)

		goto fail_input;



	result = i8042_install_filter(msi_laptop_i8042_filter);

	if (result) {

		printk(KERN_ERR
@@ -769,6 +842,9 @@ static int load_scm_model_init(struct platform_device *sdev) 
	return 0;



fail_filter:

	msi_laptop_input_destroy();



fail_input:

	rfkill_cleanup();



fail_rfkill:
@@ -886,6 +962,7 @@ static void __exit msi_cleanup(void) 
{

	if (load_scm_model) {

		i8042_remove_filter(msi_laptop_i8042_filter);

		msi_laptop_input_destroy();

		cancel_delayed_work_sync(&msi_rfkill_work);

		rfkill_cleanup();

	}