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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2017-08-01 15:38:01 -0700
committerJiri Kosina <jkosina@suse.cz>2017-08-02 10:51:46 +0200
commit581c4484769e692eade761c17c22549aaefe6749 (patch)
tree0ad00472eb86320100f7286e7c641b6335535e80 /drivers/hid
parenta9d0683e0b62b46c7a5d0ebd8f642d8f9a4b7b32 (diff)
HID: input: map digitizer battery usage
We already mapped battery strength reports from the generic device control page, but we did not update capacity from input reports, nor we mapped the battery strength report from the digitizer page, so let's implement this now. Batteries driven by the input reports will now start in "unknown" state, and will get updated once we receive first report containing battery strength from the device. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-input.c184
1 files changed, 125 insertions, 59 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index ccdff1ee1f0c..2158ec766dd5 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -340,13 +340,45 @@ static unsigned find_battery_quirk(struct hid_device *hdev)
return quirks;
}
+static int hidinput_scale_battery_capacity(struct hid_device *dev,
+ int value)
+{
+ if (dev->battery_min < dev->battery_max &&
+ value >= dev->battery_min && value <= dev->battery_max)
+ value = ((value - dev->battery_min) * 100) /
+ (dev->battery_max - dev->battery_min);
+
+ return value;
+}
+
+static int hidinput_query_battery_capacity(struct hid_device *dev)
+{
+ u8 *buf;
+ int ret;
+
+ buf = kmalloc(2, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
+ dev->battery_report_type, HID_REQ_GET_REPORT);
+ if (ret != 2) {
+ kfree(buf);
+ return -ENODATA;
+ }
+
+ ret = hidinput_scale_battery_capacity(dev, buf[1]);
+ kfree(buf);
+ return ret;
+}
+
static int hidinput_get_battery_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct hid_device *dev = power_supply_get_drvdata(psy);
+ int value;
int ret = 0;
- __u8 *buf;
switch (prop) {
case POWER_SUPPLY_PROP_PRESENT:
@@ -355,29 +387,15 @@ static int hidinput_get_battery_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_CAPACITY:
-
- buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
- if (!buf) {
- ret = -ENOMEM;
- break;
- }
- ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
- dev->battery_report_type,
- HID_REQ_GET_REPORT);
-
- if (ret != 2) {
- ret = -ENODATA;
- kfree(buf);
- break;
+ if (dev->battery_report_type == HID_FEATURE_REPORT) {
+ value = hidinput_query_battery_capacity(dev);
+ if (value < 0)
+ return value;
+ } else {
+ value = dev->battery_capacity;
}
- ret = 0;
- if (dev->battery_min < dev->battery_max &&
- buf[1] >= dev->battery_min &&
- buf[1] <= dev->battery_max)
- val->intval = (100 * (buf[1] - dev->battery_min)) /
- (dev->battery_max - dev->battery_min);
- kfree(buf);
+ val->intval = value;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
@@ -385,7 +403,22 @@ static int hidinput_get_battery_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_STATUS:
- val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ if (!dev->battery_reported &&
+ dev->battery_report_type == HID_FEATURE_REPORT) {
+ value = hidinput_query_battery_capacity(dev);
+ if (value < 0)
+ return value;
+
+ dev->battery_capacity = value;
+ dev->battery_reported = true;
+ }
+
+ if (!dev->battery_reported)
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ else if (dev->battery_capacity == 100)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
case POWER_SUPPLY_PROP_SCOPE:
@@ -400,18 +433,16 @@ static int hidinput_get_battery_property(struct power_supply *psy,
return ret;
}
-static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
+static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
{
- struct power_supply_desc *psy_desc = NULL;
+ struct power_supply_desc *psy_desc;
struct power_supply_config psy_cfg = { .drv_data = dev, };
unsigned quirks;
s32 min, max;
+ int error;
- if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
- return false; /* no match */
-
- if (dev->battery != NULL)
- goto out; /* already initialized? */
+ if (dev->battery)
+ return 0; /* already initialized? */
quirks = find_battery_quirk(dev);
@@ -419,16 +450,16 @@ static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
dev->bus, dev->vendor, dev->product, dev->version, quirks);
if (quirks & HID_BATTERY_QUIRK_IGNORE)
- goto out;
+ return 0;
psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
- if (psy_desc == NULL)
- goto out;
+ if (!psy_desc)
+ return -ENOMEM;
psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
- if (psy_desc->name == NULL) {
- kfree(psy_desc);
- goto out;
+ if (!psy_desc->name) {
+ error = -ENOMEM;
+ goto err_free_mem;
}
psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
@@ -455,17 +486,20 @@ static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
if (IS_ERR(dev->battery)) {
- hid_warn(dev, "can't register power supply: %ld\n",
- PTR_ERR(dev->battery));
- kfree(psy_desc->name);
- kfree(psy_desc);
- dev->battery = NULL;
- } else {
- power_supply_powers(dev->battery, &dev->dev);
+ error = PTR_ERR(dev->battery);
+ hid_warn(dev, "can't register power supply: %d\n", error);
+ goto err_free_name;
}
-out:
- return true;
+ power_supply_powers(dev->battery, &dev->dev);
+ return 0;
+
+err_free_name:
+ kfree(psy_desc->name);
+err_free_mem:
+ kfree(psy_desc);
+ dev->battery = NULL;
+ return error;
}
static void hidinput_cleanup_battery(struct hid_device *dev)
@@ -481,16 +515,33 @@ static void hidinput_cleanup_battery(struct hid_device *dev)
kfree(psy_desc);
dev->battery = NULL;
}
+
+static void hidinput_update_battery(struct hid_device *dev, int value)
+{
+ if (!dev->battery)
+ return;
+
+ if (value == 0 || value < dev->battery_min || value > dev->battery_max)
+ return;
+
+ dev->battery_capacity = hidinput_scale_battery_capacity(dev, value);
+ dev->battery_reported = true;
+ power_supply_changed(dev->battery);
+}
#else /* !CONFIG_HID_BATTERY_STRENGTH */
-static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
- struct hid_field *field)
+static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
+ struct hid_field *field)
{
- return false;
+ return 0;
}
static void hidinput_cleanup_battery(struct hid_device *dev)
{
}
+
+static void hidinput_update_battery(struct hid_device *dev, int value)
+{
+}
#endif /* CONFIG_HID_BATTERY_STRENGTH */
static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
@@ -710,6 +761,11 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
}
break;
+ case 0x3b: /* Battery Strength */
+ hidinput_setup_battery(device, HID_INPUT_REPORT, field);
+ usage->type = EV_PWR;
+ goto ignore;
+
case 0x3c: /* Invert */
map_key_clear(BTN_TOOL_RUBBER);
break;
@@ -944,11 +1000,13 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
break;
case HID_UP_GENDEVCTRLS:
- if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
+ switch (usage->hid) {
+ case HID_DC_BATTERYSTRENGTH:
+ hidinput_setup_battery(device, HID_INPUT_REPORT, field);
+ usage->type = EV_PWR;
goto ignore;
- else
- goto unknown;
- break;
+ }
+ goto unknown;
case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */
set_bit(EV_REP, input->evbit);
@@ -1031,7 +1089,6 @@ mapped:
if (usage->code > max)
goto ignore;
-
if (usage->type == EV_ABS) {
int a = field->logical_minimum;
@@ -1090,14 +1147,19 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
struct input_dev *input;
unsigned *quirks = &hid->quirks;
- if (!field->hidinput)
+ if (!usage->type)
return;
- input = field->hidinput->input;
+ if (usage->type == EV_PWR) {
+ hidinput_update_battery(hid, value);
+ return;
+ }
- if (!usage->type)
+ if (!field->hidinput)
return;
+ input = field->hidinput->input;
+
if (usage->hat_min < usage->hat_max || usage->hat_dir) {
int hat_dir = usage->hat_dir;
if (!hat_dir)
@@ -1373,6 +1435,7 @@ static void report_features(struct hid_device *hid)
struct hid_driver *drv = hid->driver;
struct hid_report_enum *rep_enum;
struct hid_report *rep;
+ struct hid_usage *usage;
int i, j;
rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
@@ -1383,12 +1446,15 @@ static void report_features(struct hid_device *hid)
continue;
for (j = 0; j < rep->field[i]->maxusage; j++) {
+ usage = &rep->field[i]->usage[j];
+
/* Verify if Battery Strength feature is available */
- hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
+ if (usage->hid == HID_DC_BATTERYSTRENGTH)
+ hidinput_setup_battery(hid, HID_FEATURE_REPORT,
+ rep->field[i]);
if (drv->feature_mapping)
- drv->feature_mapping(hid, rep->field[i],
- rep->field[i]->usage + j);
+ drv->feature_mapping(hid, rep->field[i], usage);
}
}
}

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