Merge branch 'hid-battery' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy...
[~shefty/rdma-dev.git] / drivers / hid / hid-input.c
index c6ee632bfd68df219e24701e3dcadbf1b810bc1e..9333d692a786b03df115ebe87d920e748b607dc6 100644 (file)
@@ -32,6 +32,8 @@
 #include <linux/hid.h>
 #include <linux/hid-debug.h>
 
+#include "hid-ids.h"
+
 #define unk    KEY_UNKNOWN
 
 static const unsigned char hid_keyboard[256] = {
@@ -277,14 +279,38 @@ static enum power_supply_property hidinput_battery_props[] = {
        POWER_SUPPLY_PROP_ONLINE,
        POWER_SUPPLY_PROP_CAPACITY,
        POWER_SUPPLY_PROP_MODEL_NAME,
+       POWER_SUPPLY_PROP_STATUS
 };
 
+#define HID_BATTERY_QUIRK_PERCENT      (1 << 0) /* always reports percent */
+#define HID_BATTERY_QUIRK_FEATURE      (1 << 1) /* ask for feature report */
+
+static const struct hid_device_id hid_battery_quirks[] = {
+       { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
+                              USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
+         HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
+       {}
+};
+
+static unsigned find_battery_quirk(struct hid_device *hdev)
+{
+       unsigned quirks = 0;
+       const struct hid_device_id *match;
+
+       match = hid_match_id(hdev, hid_battery_quirks);
+       if (match != NULL)
+               quirks = match->driver_data;
+
+       return quirks;
+}
+
 static int hidinput_get_battery_property(struct power_supply *psy,
                                         enum power_supply_property prop,
                                         union power_supply_propval *val)
 {
        struct hid_device *dev = container_of(psy, struct hid_device, battery);
        int ret = 0;
+       __u8 buf[2] = {};
 
        switch (prop) {
        case POWER_SUPPLY_PROP_PRESENT:
@@ -293,19 +319,31 @@ static int hidinput_get_battery_property(struct power_supply *psy,
                break;
 
        case POWER_SUPPLY_PROP_CAPACITY:
+               ret = dev->hid_get_raw_report(dev, dev->battery_report_id,
+                                             buf, sizeof(buf),
+                                             dev->battery_report_type);
+
+               if (ret != 2) {
+                       if (ret >= 0)
+                               ret = -EINVAL;
+                       break;
+               }
+
                if (dev->battery_min < dev->battery_max &&
-                   dev->battery_val >= dev->battery_min &&
-                   dev->battery_val <= dev->battery_max)
-                       val->intval = (100 * (dev->battery_val - dev->battery_min)) /
+                   buf[1] >= dev->battery_min &&
+                   buf[1] <= dev->battery_max)
+                       val->intval = (100 * (buf[1] - dev->battery_min)) /
                                (dev->battery_max - dev->battery_min);
-               else
-                       ret = -EINVAL;
                break;
 
        case POWER_SUPPLY_PROP_MODEL_NAME:
                val->strval = dev->name;
                break;
 
+       case POWER_SUPPLY_PROP_STATUS:
+               val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+               break;
+
        default:
                ret = -EINVAL;
                break;
@@ -314,17 +352,22 @@ static int hidinput_get_battery_property(struct power_supply *psy,
        return ret;
 }
 
-static void hidinput_setup_battery(struct hid_device *dev, s32 min, s32 max)
+static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 {
        struct power_supply *battery = &dev->battery;
        int ret;
+       unsigned quirks;
+       s32 min, max;
+
+       if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
+               return false;   /* no match */
 
        if (battery->name != NULL)
-               return;         /* already initialized? */
+               goto out;       /* already initialized? */
 
        battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
        if (battery->name == NULL)
-               return;
+               goto out;
 
        battery->type = POWER_SUPPLY_TYPE_BATTERY;
        battery->properties = hidinput_battery_props;
@@ -332,8 +375,26 @@ static void hidinput_setup_battery(struct hid_device *dev, s32 min, s32 max)
        battery->use_for_apm = 0;
        battery->get_property = hidinput_get_battery_property;
 
+       quirks = find_battery_quirk(dev);
+
+       hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
+               dev->bus, dev->vendor, dev->product, dev->version, quirks);
+
+       min = field->logical_minimum;
+       max = field->logical_maximum;
+
+       if (quirks & HID_BATTERY_QUIRK_PERCENT) {
+               min = 0;
+               max = 100;
+       }
+
+       if (quirks & HID_BATTERY_QUIRK_FEATURE)
+               report_type = HID_FEATURE_REPORT;
+
        dev->battery_min = min;
        dev->battery_max = max;
+       dev->battery_report_type = report_type;
+       dev->battery_report_id = field->report->id;
 
        ret = power_supply_register(&dev->dev, battery);
        if (ret != 0) {
@@ -341,6 +402,9 @@ static void hidinput_setup_battery(struct hid_device *dev, s32 min, s32 max)
                kfree(battery->name);
                battery->name = NULL;
        }
+
+out:
+       return true;
 }
 
 static void hidinput_cleanup_battery(struct hid_device *dev)
@@ -353,8 +417,10 @@ static void hidinput_cleanup_battery(struct hid_device *dev)
        dev->battery.name = NULL;
 }
 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
-static void hidinput_setup_battery(struct hid_device *dev, s32 min, s32 max)
+static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
+                                  struct hid_field *field)
 {
+       return false;
 }
 
 static void hidinput_cleanup_battery(struct hid_device *dev)
@@ -721,12 +787,9 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                break;
 
        case HID_UP_GENDEVCTRLS:
-               if ((usage->hid & HID_USAGE) == 0x20) { /* Battery Strength */
-                       hidinput_setup_battery(device,
-                                              field->logical_minimum,
-                                              field->logical_maximum);
+               if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
                        goto ignore;
-               else
+               else
                        goto unknown;
                break;
 
@@ -861,14 +924,6 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
 
        input = field->hidinput->input;
 
-#ifdef CONFIG_HID_BATTERY_STRENGTH
-       if (usage->hid == HID_DC_BATTERYSTRENGTH) {
-               hid->battery_val = value;
-               hid_dbg(hid, "battery value is %d (range %d-%d)\n",
-                       value, hid->battery_min, hid->battery_max);
-               return;
-       }
-#endif
        if (!usage->type)
                return;
 
@@ -1039,15 +1094,17 @@ static void report_features(struct hid_device *hid)
        struct hid_report *rep;
        int i, j;
 
-       if (!drv->feature_mapping)
-               return;
-
        rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
        list_for_each_entry(rep, &rep_enum->report_list, list)
                for (i = 0; i < rep->maxfield; i++)
-                       for (j = 0; j < rep->field[i]->maxusage; j++)
-                               drv->feature_mapping(hid, rep->field[i],
-                                                    rep->field[i]->usage + j);
+                       for (j = 0; j < rep->field[i]->maxusage; j++) {
+                               /* Verify if Battery Strength feature is available */
+                               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);
+                       }
 }
 
 /*