Commit 6311d329 authored by NOGUCHI Hiroshi's avatar NOGUCHI Hiroshi Committed by Jiri Kosina
Browse files

HID: hid-asus: Add BT keyboard dock battery monitoring support 



Add battery monitoring support for Transbook T100CHI/T90CHI's Bluetooth
keyboard dock.  They report rest battery level and charging status.

Signed-off-by: default avatarNOGUCHI Hiroshi <drvlabo@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent a767ffea

drivers/hid/hid-asus.c

+193 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/platform_data/x86/asus-wmi.h>

#include <linux/input/mt.h>

#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */

#include <linux/power_supply.h>



#include "hid-ids.h"
@@ -61,6 +62,13 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad"); 
#define CONTACT_TOUCH_MAJOR_MASK 0x07

#define CONTACT_PRESSURE_MASK 0x7f



#define	BATTERY_REPORT_ID	(0x03)

#define	BATTERY_REPORT_SIZE	(1 + 8)

#define	BATTERY_LEVEL_MAX	((u8)255)

#define	BATTERY_STAT_DISCONNECT	(0)

#define	BATTERY_STAT_CHARGING	(1)

#define	BATTERY_STAT_FULL	(2)



#define QUIRK_FIX_NOTEBOOK_REPORT	BIT(0)

#define QUIRK_NO_INIT_REPORTS		BIT(1)

#define QUIRK_SKIP_INPUT_MAPPING	BIT(2)
@@ -101,12 +109,21 @@ struct asus_touchpad_info { 


struct asus_drvdata {

	unsigned long quirks;

	struct hid_device *hdev;

	struct input_dev *input;

	struct asus_kbd_leds *kbd_backlight;

	const struct asus_touchpad_info *tp;

	bool enable_backlight;

	struct power_supply *battery;

	struct power_supply_desc battery_desc;

	int battery_capacity;

	int battery_stat;

	bool battery_in_query;

	unsigned long battery_next_query;

};



static int asus_report_battery(struct asus_drvdata *, u8 *, int);



static const struct asus_touchpad_info asus_i2c_tp = {

	.max_x = 2794,

	.max_y = 1758,
@@ -260,6 +277,9 @@ static int asus_raw_event(struct hid_device *hdev, 
{

	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);



	if (drvdata->battery && data[0] == BATTERY_REPORT_ID)

		return asus_report_battery(drvdata, data, size);



	if (drvdata->tp && data[0] == INPUT_REPORT_ID)

		return asus_report_input(drvdata, data, size);
@@ -429,6 +449,164 @@ static int asus_kbd_register_leds(struct hid_device *hdev) 
	return ret;

}



/*

 * [0]       REPORT_ID (same value defined in report descriptor)

 * [1]	     rest battery level. range [0..255]

 * [2]..[7]  Bluetooth hardware address (MAC address)

 * [8]       charging status

 *            = 0 : AC offline / discharging

 *            = 1 : AC online  / charging

 *            = 2 : AC online  / fully charged

 */

static int asus_parse_battery(struct asus_drvdata *drvdata, u8 *data, int size)

{

	u8 sts;

	u8 lvl;

	int val;



	lvl = data[1];

	sts = data[8];



	drvdata->battery_capacity = ((int)lvl * 100) / (int)BATTERY_LEVEL_MAX;



	switch (sts) {

	case BATTERY_STAT_CHARGING:

		val = POWER_SUPPLY_STATUS_CHARGING;

		break;

	case BATTERY_STAT_FULL:

		val = POWER_SUPPLY_STATUS_FULL;

		break;

	case BATTERY_STAT_DISCONNECT:

	default:

		val = POWER_SUPPLY_STATUS_DISCHARGING;

		break;

	}

	drvdata->battery_stat = val;



	return 0;

}



static int asus_report_battery(struct asus_drvdata *drvdata, u8 *data, int size)

{

	/* notify only the autonomous event by device */

	if ((drvdata->battery_in_query == false) &&

			 (size == BATTERY_REPORT_SIZE))

		power_supply_changed(drvdata->battery);



	return 0;

}



static int asus_battery_query(struct asus_drvdata *drvdata)

{

	u8 *buf;

	int ret = 0;



	buf = kmalloc(BATTERY_REPORT_SIZE, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	drvdata->battery_in_query = true;

	ret = hid_hw_raw_request(drvdata->hdev, BATTERY_REPORT_ID,

				buf, BATTERY_REPORT_SIZE,

				HID_INPUT_REPORT, HID_REQ_GET_REPORT);

	drvdata->battery_in_query = false;

	if (ret == BATTERY_REPORT_SIZE)

		ret = asus_parse_battery(drvdata, buf, BATTERY_REPORT_SIZE);

	else

		ret = -ENODATA;



	kfree(buf);



	return ret;

}



static enum power_supply_property asus_battery_props[] = {

	POWER_SUPPLY_PROP_STATUS,

	POWER_SUPPLY_PROP_PRESENT,

	POWER_SUPPLY_PROP_CAPACITY,

	POWER_SUPPLY_PROP_SCOPE,

	POWER_SUPPLY_PROP_MODEL_NAME,

};



#define	QUERY_MIN_INTERVAL	(60 * HZ)	/* 60[sec] */



static int asus_battery_get_property(struct power_supply *psy,

				enum power_supply_property psp,

				union power_supply_propval *val)

{

	struct asus_drvdata *drvdata = power_supply_get_drvdata(psy);

	int ret = 0;



	switch (psp) {

	case POWER_SUPPLY_PROP_STATUS:

	case POWER_SUPPLY_PROP_CAPACITY:

		if (time_before(drvdata->battery_next_query, jiffies)) {

			drvdata->battery_next_query =

					 jiffies + QUERY_MIN_INTERVAL;

			ret = asus_battery_query(drvdata);

			if (ret)

				return ret;

		}

		if (psp == POWER_SUPPLY_PROP_STATUS)

			val->intval = drvdata->battery_stat;

		else

			val->intval = drvdata->battery_capacity;

		break;

	case POWER_SUPPLY_PROP_PRESENT:

		val->intval = 1;

		break;

	case POWER_SUPPLY_PROP_SCOPE:

		val->intval = POWER_SUPPLY_SCOPE_DEVICE;

		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:

		val->strval = drvdata->hdev->name;

		break;

	default:

		ret = -EINVAL;

		break;

	}



	return ret;

}



static int asus_battery_probe(struct hid_device *hdev)

{

	struct asus_drvdata *drvdata = hid_get_drvdata(hdev);

	struct power_supply_config pscfg = { .drv_data = drvdata };

	int ret = 0;



	drvdata->battery_capacity = 0;

	drvdata->battery_stat = POWER_SUPPLY_STATUS_UNKNOWN;

	drvdata->battery_in_query = false;



	drvdata->battery_desc.properties = asus_battery_props;

	drvdata->battery_desc.num_properties = ARRAY_SIZE(asus_battery_props);

	drvdata->battery_desc.get_property = asus_battery_get_property;

	drvdata->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;

	drvdata->battery_desc.use_for_apm = 0;

	drvdata->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,

					"asus-keyboard-%s-battery",

					strlen(hdev->uniq) ?

					hdev->uniq : dev_name(&hdev->dev));

	if (!drvdata->battery_desc.name)

		return -ENOMEM;



	drvdata->battery_next_query = jiffies;



	drvdata->battery = devm_power_supply_register(&hdev->dev,

				&(drvdata->battery_desc), &pscfg);

	if (IS_ERR(drvdata->battery)) {

		ret = PTR_ERR(drvdata->battery);

		drvdata->battery = NULL;

		hid_err(hdev, "Unable to register battery device\n");

		return ret;

	}



	power_supply_powers(drvdata->battery, &hdev->dev);



	return ret;

}



static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)

{

	struct input_dev *input = hi->input;
@@ -661,6 +839,10 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id) 


	drvdata->quirks = id->driver_data;



	/*

	 * T90CHI's keyboard dock returns same ID values as T100CHI's dock.

	 * Thus, identify T90CHI dock with product name string.

	 */

	if (strstr(hdev->name, "T90CHI")) {

		drvdata->quirks &= ~QUIRK_T100CHI;

		drvdata->quirks |= QUIRK_T90CHI;
@@ -700,6 +882,17 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id) 
	if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)

		hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;



	drvdata->hdev = hdev;



	if (drvdata->quirks & (QUIRK_T100CHI | QUIRK_T90CHI)) {

		ret = asus_battery_probe(hdev);

		if (ret) {

			hid_err(hdev,

			    "Asus hid battery_probe failed: %d\n", ret);

			return ret;

		}

	}



	ret = hid_parse(hdev);

	if (ret) {

		hid_err(hdev, "Asus hid parse failed: %d\n", ret);