1 files changed, 89 insertions, 54 deletions

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index fda9dce3da99..2633fcd8f910 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -303,6 +303,19 @@ __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 		}
 		break;
 
+	case ABS_PRESSURE:
+	case ABS_MT_PRESSURE:
+		if (field->unit == HID_UNIT_NEWTON) {
+			/* Convert to grams, 1 newton is 101.97 grams */
+			prev = physical_extents;
+			physical_extents *= 10197;
+			if (physical_extents < prev)
+				return 0;
+			unit_exponent -= 2;
+		} else if (field->unit != HID_UNIT_GRAM) {
+			return 0;
+		}
+		break;
 	default:
 		return 0;
 	}
@@ -386,10 +399,11 @@ static const struct hid_device_id hid_battery_quirks[] = {
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM),
 	  HID_BATTERY_QUIRK_AVOID_QUERY },
 	/*
-	 * Elan I2C-HID touchscreens seem to all report a non present battery,
-	 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C-HID devices.
+	 * Elan HID touchscreens seem to all report a non present battery,
+	 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices.
 	 */
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE },
 	{}
 };
 
@@ -595,14 +609,37 @@ static void hidinput_cleanup_battery(struct hid_device *dev)
 	dev->battery = NULL;
 }
 
-static void hidinput_update_battery(struct hid_device *dev, int value)
+static bool hidinput_update_battery_charge_status(struct hid_device *dev,
+						  unsigned int usage, int value)
+{
+	switch (usage) {
+	case HID_BAT_CHARGING:
+		dev->battery_charge_status = value ?
+					     POWER_SUPPLY_STATUS_CHARGING :
+					     POWER_SUPPLY_STATUS_DISCHARGING;
+		return true;
+	}
+
+	return false;
+}
+
+static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
+				    int value)
 {
 	int capacity;
 
 	if (!dev->battery)
 		return;
 
-	if (value == 0 || value < dev->battery_min || value > dev->battery_max)
+	if (hidinput_update_battery_charge_status(dev, usage, value)) {
+		power_supply_changed(dev->battery);
+		return;
+	}
+
+	if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0)
+		return;
+
+	if (value < dev->battery_min || value > dev->battery_max)
 		return;
 
 	capacity = hidinput_scale_battery_capacity(dev, value);
@@ -617,20 +654,6 @@ static void hidinput_update_battery(struct hid_device *dev, int value)
 		power_supply_changed(dev->battery);
 	}
 }
-
-static bool hidinput_set_battery_charge_status(struct hid_device *dev,
-					       unsigned int usage, int value)
-{
-	switch (usage) {
-	case HID_BAT_CHARGING:
-		dev->battery_charge_status = value ?
-					     POWER_SUPPLY_STATUS_CHARGING :
-					     POWER_SUPPLY_STATUS_DISCHARGING;
-		return true;
-	}
-
-	return false;
-}
 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 				  struct hid_field *field, bool is_percentage)
@@ -642,14 +665,9 @@ static void hidinput_cleanup_battery(struct hid_device *dev)
 {
 }
 
-static void hidinput_update_battery(struct hid_device *dev, int value)
-{
-}
-
-static bool hidinput_set_battery_charge_status(struct hid_device *dev,
-					       unsigned int usage, int value)
+static void hidinput_update_battery(struct hid_device *dev, unsigned int usage,
+				    int value)
 {
-	return false;
 }
 #endif	/* CONFIG_HID_BATTERY_STRENGTH */
 
@@ -682,9 +700,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 	if (field->report_count < 1)
 		goto ignore;
 
-	/* only LED usages are supported in output fields */
+	/* only LED and HAPTIC usages are supported in output fields */
 	if (field->report_type == HID_OUTPUT_REPORT &&
-			(usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
+	    (usage->hid & HID_USAGE_PAGE) != HID_UP_LED &&
+	    (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) {
 		goto ignore;
 	}
 
@@ -810,10 +829,23 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 			break;
 		}
 
-		if ((usage->hid & 0xf0) == 0x90) { /* SystemControl*/
-			switch (usage->hid & 0xf) {
-			case 0xb: map_key_clear(KEY_DO_NOT_DISTURB); break;
-			default: goto ignore;
+		if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */
+			switch (usage->hid) {
+			case HID_GD_UP:	   usage->hat_dir = 1; break;
+			case HID_GD_DOWN:  usage->hat_dir = 5; break;
+			case HID_GD_RIGHT: usage->hat_dir = 3; break;
+			case HID_GD_LEFT:  usage->hat_dir = 7; break;
+			case HID_GD_DO_NOT_DISTURB:
+				map_key_clear(KEY_DO_NOT_DISTURB); break;
+			default: goto unknown;
+			}
+
+			if (usage->hid <= HID_GD_LEFT) {
+				if (field->dpad) {
+					map_abs(field->dpad);
+					goto ignore;
+				}
+				map_abs(ABS_HAT0X);
 			}
 			break;
 		}
@@ -844,25 +876,9 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 		if (field->application == HID_GD_SYSTEM_CONTROL)
 			goto ignore;
 
-		if ((usage->hid & 0xf0) == 0x90) {	/* D-pad */
-			switch (usage->hid) {
-			case HID_GD_UP:	   usage->hat_dir = 1; break;
-			case HID_GD_DOWN:  usage->hat_dir = 5; break;
-			case HID_GD_RIGHT: usage->hat_dir = 3; break;
-			case HID_GD_LEFT:  usage->hat_dir = 7; break;
-			default: goto unknown;
-			}
-			if (field->dpad) {
-				map_abs(field->dpad);
-				goto ignore;
-			}
-			map_abs(ABS_HAT0X);
-			break;
-		}
-
 		switch (usage->hid) {
 		/* These usage IDs map directly to the usage codes. */
-		case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
+		case HID_GD_X: case HID_GD_Y:
 		case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 			if (field->flags & HID_MAIN_ITEM_RELATIVE)
 				map_rel(usage->hid & 0xf);
@@ -870,6 +886,22 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 				map_abs_clear(usage->hid & 0xf);
 			break;
 
+		case HID_GD_Z:
+			/* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */
+			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
+				map_rel(usage->hid & 0xf);
+			} else {
+				if (field->application == HID_DG_PEN ||
+				    field->physical == HID_DG_PEN ||
+				    field->logical == HID_DG_STYLUS ||
+				    field->physical == HID_DG_STYLUS ||
+				    field->application == HID_DG_DIGITIZER)
+					map_abs_clear(ABS_DISTANCE);
+				else
+					map_abs_clear(usage->hid & 0xf);
+			}
+			break;
+
 		case HID_GD_WHEEL:
 			if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 				set_bit(REL_WHEEL, input->relbit);
@@ -1518,11 +1550,7 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
 		return;
 
 	if (usage->type == EV_PWR) {
-		bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
-
-		if (!handled)
-			hidinput_update_battery(hid, value);
-
+		hidinput_update_battery(hid, usage->hid, value);
 		return;
 	}
 
@@ -2346,7 +2374,7 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 	}
 
 	if (list_empty(&hid->inputs)) {
-		hid_err(hid, "No inputs registered, leaving\n");
+		hid_dbg(hid, "No inputs registered, leaving\n");
 		goto out_unwind;
 	}
 
@@ -2388,6 +2416,13 @@ void hidinput_disconnect(struct hid_device *hid)
 }
 EXPORT_SYMBOL_GPL(hidinput_disconnect);
 
+void hidinput_reset_resume(struct hid_device *hid)
+{
+	/* renegotiate host-device shared state after reset */
+	hidinput_change_resolution_multipliers(hid);
+}
+EXPORT_SYMBOL_GPL(hidinput_reset_resume);
+
 #ifdef CONFIG_HID_KUNIT_TEST
 #include "hid-input-test.c"
 #endif