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: NOGUCHI Hiroshi <drvlabo@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>hifive-unleashed-5.1
NOGUCHI Hiroshi
Jiri Kosina
parent
a767ffea05
commit
6311d329e1
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@ -32,6 +32,7 @@
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#include <linux/platform_data/x86/asus-wmi.h>
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#include <linux/input/mt.h>
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#include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
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#include <linux/power_supply.h>
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#include "hid-ids.h"
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@ -61,6 +62,13 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
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#define CONTACT_TOUCH_MAJOR_MASK 0x07
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#define CONTACT_PRESSURE_MASK 0x7f
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#define BATTERY_REPORT_ID (0x03)
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#define BATTERY_REPORT_SIZE (1 + 8)
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#define BATTERY_LEVEL_MAX ((u8)255)
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#define BATTERY_STAT_DISCONNECT (0)
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#define BATTERY_STAT_CHARGING (1)
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#define BATTERY_STAT_FULL (2)
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#define QUIRK_FIX_NOTEBOOK_REPORT BIT(0)
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#define QUIRK_NO_INIT_REPORTS BIT(1)
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#define QUIRK_SKIP_INPUT_MAPPING BIT(2)
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@ -101,12 +109,21 @@ struct asus_touchpad_info {
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struct asus_drvdata {
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unsigned long quirks;
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struct hid_device *hdev;
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struct input_dev *input;
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struct asus_kbd_leds *kbd_backlight;
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const struct asus_touchpad_info *tp;
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bool enable_backlight;
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struct power_supply *battery;
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struct power_supply_desc battery_desc;
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int battery_capacity;
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int battery_stat;
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bool battery_in_query;
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unsigned long battery_next_query;
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};
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static int asus_report_battery(struct asus_drvdata *, u8 *, int);
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static const struct asus_touchpad_info asus_i2c_tp = {
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.max_x = 2794,
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.max_y = 1758,
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@ -260,6 +277,9 @@ static int asus_raw_event(struct hid_device *hdev,
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{
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struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
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if (drvdata->battery && data[0] == BATTERY_REPORT_ID)
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return asus_report_battery(drvdata, data, size);
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if (drvdata->tp && data[0] == INPUT_REPORT_ID)
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return asus_report_input(drvdata, data, size);
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@ -429,6 +449,164 @@ static int asus_kbd_register_leds(struct hid_device *hdev)
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return ret;
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}
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/*
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* [0] REPORT_ID (same value defined in report descriptor)
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* [1] rest battery level. range [0..255]
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* [2]..[7] Bluetooth hardware address (MAC address)
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* [8] charging status
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* = 0 : AC offline / discharging
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* = 1 : AC online / charging
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* = 2 : AC online / fully charged
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*/
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static int asus_parse_battery(struct asus_drvdata *drvdata, u8 *data, int size)
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{
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u8 sts;
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u8 lvl;
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int val;
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lvl = data[1];
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sts = data[8];
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drvdata->battery_capacity = ((int)lvl * 100) / (int)BATTERY_LEVEL_MAX;
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switch (sts) {
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case BATTERY_STAT_CHARGING:
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val = POWER_SUPPLY_STATUS_CHARGING;
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break;
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case BATTERY_STAT_FULL:
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val = POWER_SUPPLY_STATUS_FULL;
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break;
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case BATTERY_STAT_DISCONNECT:
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default:
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val = POWER_SUPPLY_STATUS_DISCHARGING;
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break;
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}
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drvdata->battery_stat = val;
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return 0;
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}
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static int asus_report_battery(struct asus_drvdata *drvdata, u8 *data, int size)
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{
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/* notify only the autonomous event by device */
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if ((drvdata->battery_in_query == false) &&
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(size == BATTERY_REPORT_SIZE))
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power_supply_changed(drvdata->battery);
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return 0;
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}
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static int asus_battery_query(struct asus_drvdata *drvdata)
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{
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u8 *buf;
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int ret = 0;
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buf = kmalloc(BATTERY_REPORT_SIZE, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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drvdata->battery_in_query = true;
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ret = hid_hw_raw_request(drvdata->hdev, BATTERY_REPORT_ID,
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buf, BATTERY_REPORT_SIZE,
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HID_INPUT_REPORT, HID_REQ_GET_REPORT);
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drvdata->battery_in_query = false;
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if (ret == BATTERY_REPORT_SIZE)
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ret = asus_parse_battery(drvdata, buf, BATTERY_REPORT_SIZE);
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else
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ret = -ENODATA;
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kfree(buf);
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return ret;
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}
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static enum power_supply_property asus_battery_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_CAPACITY,
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POWER_SUPPLY_PROP_SCOPE,
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POWER_SUPPLY_PROP_MODEL_NAME,
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};
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#define QUERY_MIN_INTERVAL (60 * HZ) /* 60[sec] */
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static int asus_battery_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct asus_drvdata *drvdata = power_supply_get_drvdata(psy);
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int ret = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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case POWER_SUPPLY_PROP_CAPACITY:
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if (time_before(drvdata->battery_next_query, jiffies)) {
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drvdata->battery_next_query =
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jiffies + QUERY_MIN_INTERVAL;
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ret = asus_battery_query(drvdata);
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if (ret)
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return ret;
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}
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if (psp == POWER_SUPPLY_PROP_STATUS)
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val->intval = drvdata->battery_stat;
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else
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val->intval = drvdata->battery_capacity;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = 1;
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break;
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case POWER_SUPPLY_PROP_SCOPE:
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val->intval = POWER_SUPPLY_SCOPE_DEVICE;
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = drvdata->hdev->name;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int asus_battery_probe(struct hid_device *hdev)
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{
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struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
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struct power_supply_config pscfg = { .drv_data = drvdata };
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int ret = 0;
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drvdata->battery_capacity = 0;
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drvdata->battery_stat = POWER_SUPPLY_STATUS_UNKNOWN;
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drvdata->battery_in_query = false;
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drvdata->battery_desc.properties = asus_battery_props;
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drvdata->battery_desc.num_properties = ARRAY_SIZE(asus_battery_props);
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drvdata->battery_desc.get_property = asus_battery_get_property;
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drvdata->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
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drvdata->battery_desc.use_for_apm = 0;
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drvdata->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
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"asus-keyboard-%s-battery",
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strlen(hdev->uniq) ?
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hdev->uniq : dev_name(&hdev->dev));
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if (!drvdata->battery_desc.name)
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return -ENOMEM;
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drvdata->battery_next_query = jiffies;
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drvdata->battery = devm_power_supply_register(&hdev->dev,
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&(drvdata->battery_desc), &pscfg);
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if (IS_ERR(drvdata->battery)) {
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ret = PTR_ERR(drvdata->battery);
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drvdata->battery = NULL;
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hid_err(hdev, "Unable to register battery device\n");
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return ret;
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}
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power_supply_powers(drvdata->battery, &hdev->dev);
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return ret;
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}
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static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
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{
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struct input_dev *input = hi->input;
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@ -661,6 +839,10 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
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drvdata->quirks = id->driver_data;
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/*
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* T90CHI's keyboard dock returns same ID values as T100CHI's dock.
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* Thus, identify T90CHI dock with product name string.
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*/
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if (strstr(hdev->name, "T90CHI")) {
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drvdata->quirks &= ~QUIRK_T100CHI;
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drvdata->quirks |= QUIRK_T90CHI;
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@ -700,6 +882,17 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
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if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
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hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
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drvdata->hdev = hdev;
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if (drvdata->quirks & (QUIRK_T100CHI | QUIRK_T90CHI)) {
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ret = asus_battery_probe(hdev);
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if (ret) {
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hid_err(hdev,
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"Asus hid battery_probe failed: %d\n", ret);
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return ret;
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}
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}
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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "Asus hid parse failed: %d\n", ret);
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