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authorAaron Armstrong Skomra <skomra@gmail.com>2018-03-06 10:48:34 -0800
committerJiri Kosina <jkosina@suse.cz>2018-03-07 15:21:44 +0100
commitf8b6a74719b5e003e28b2deb7ef91d7158333cbf (patch)
treedae8a23ceb9b5dc1155d4690c5264a892d8eba81 /drivers/hid
parent87046b6c995c50c11c8bd4a71877df83f99b3516 (diff)
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HID: wacom: generic: Support multiple tools per report
Some Wacom devices contain contain Pen and Pad usages in the same report. Future devices of this type may utilize HID Descriptors. The generic code path of the Wacom driver previously assumed pen, touch, and pad reports were delivered in separate reports. This patch adds support for processing each collection of a report separately, in order to support reports with multiple tools. Signed-off-by: Aaron Armstrong Skomra <skomra@gmail.com> Reviewed-by: Ping Cheng <ping.cheng@wacom.com> Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/wacom_wac.c94
1 files changed, 68 insertions, 26 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index d532c1ebf2ee..7a0a7f67e7ed 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2072,7 +2072,7 @@ static void wacom_wac_pad_pre_report(struct hid_device *hdev,
}
static void wacom_wac_pad_report(struct hid_device *hdev,
- struct hid_report *report)
+ struct hid_report *report, struct hid_field *field)
{
struct wacom *wacom = hid_get_drvdata(hdev);
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
@@ -2080,7 +2080,7 @@ static void wacom_wac_pad_report(struct hid_device *hdev,
bool active = wacom_wac->hid_data.inrange_state != 0;
/* report prox for expresskey events */
- if ((wacom_equivalent_usage(report->field[0]->physical) == HID_DG_TABLETFUNCTIONKEY) &&
+ if ((wacom_equivalent_usage(field->physical) == HID_DG_TABLETFUNCTIONKEY) &&
wacom_wac->hid_data.pad_input_event_flag) {
input_event(input, EV_ABS, ABS_MISC, active ? PAD_DEVICE_ID : 0);
input_sync(input);
@@ -2627,11 +2627,13 @@ void wacom_wac_event(struct hid_device *hdev, struct hid_field *field,
wacom_wac_finger_event(hdev, field, usage, value);
}
-static void wacom_report_events(struct hid_device *hdev, struct hid_report *report)
+static void wacom_report_events(struct hid_device *hdev,
+ struct hid_report *report, int collection_index,
+ int field_index)
{
int r;
- for (r = 0; r < report->maxfield; r++) {
+ for (r = field_index; r < report->maxfield; r++) {
struct hid_field *field;
unsigned count, n;
@@ -2641,30 +2643,23 @@ static void wacom_report_events(struct hid_device *hdev, struct hid_report *repo
if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
continue;
- for (n = 0; n < count; n++)
- wacom_wac_event(hdev, field, &field->usage[n], field->value[n]);
+ for (n = 0 ; n < count; n++) {
+ if (field->usage[n].collection_index == collection_index)
+ wacom_wac_event(hdev, field, &field->usage[n],
+ field->value[n]);
+ else
+ return;
+ }
}
}
-void wacom_wac_report(struct hid_device *hdev, struct hid_report *report)
+int wacom_wac_collection(struct hid_device *hdev, struct hid_report *report,
+ int collection_index, struct hid_field *field,
+ int field_index)
{
struct wacom *wacom = hid_get_drvdata(hdev);
- struct wacom_wac *wacom_wac = &wacom->wacom_wac;
- struct hid_field *field = report->field[0];
-
- if (wacom_wac->features.type != HID_GENERIC)
- return;
-
- wacom_wac_battery_pre_report(hdev, report);
-
- if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)
- wacom_wac_pad_pre_report(hdev, report);
- else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
- wacom_wac_pen_pre_report(hdev, report);
- else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)
- wacom_wac_finger_pre_report(hdev, report);
- wacom_report_events(hdev, report);
+ wacom_report_events(hdev, report, collection_index, field_index);
/*
* Non-input reports may be sent prior to the device being
@@ -2674,16 +2669,63 @@ void wacom_wac_report(struct hid_device *hdev, struct hid_report *report)
* processing functions.
*/
if (report->type != HID_INPUT_REPORT)
- return;
-
- wacom_wac_battery_report(hdev, report);
+ return -1;
if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)
- wacom_wac_pad_report(hdev, report);
+ wacom_wac_pad_report(hdev, report, field);
else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
wacom_wac_pen_report(hdev, report);
else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)
wacom_wac_finger_report(hdev, report);
+
+ return 0;
+}
+
+void wacom_wac_report(struct hid_device *hdev, struct hid_report *report)
+{
+ struct wacom *wacom = hid_get_drvdata(hdev);
+ struct wacom_wac *wacom_wac = &wacom->wacom_wac;
+ struct hid_field *field;
+ bool pad_in_hid_field = false, pen_in_hid_field = false,
+ finger_in_hid_field = false;
+ int r;
+ int prev_collection = -1;
+
+ if (wacom_wac->features.type != HID_GENERIC)
+ return;
+
+ for (r = 0; r < report->maxfield; r++) {
+ field = report->field[r];
+
+ if (WACOM_PAD_FIELD(field))
+ pad_in_hid_field = true;
+ if (WACOM_PEN_FIELD(field))
+ pen_in_hid_field = true;
+ if (WACOM_FINGER_FIELD(field))
+ finger_in_hid_field = true;
+ }
+
+ wacom_wac_battery_pre_report(hdev, report);
+
+ if (pad_in_hid_field && wacom->wacom_wac.pad_input)
+ wacom_wac_pad_pre_report(hdev, report);
+ if (pen_in_hid_field && wacom->wacom_wac.pen_input)
+ wacom_wac_pen_pre_report(hdev, report);
+ if (finger_in_hid_field && wacom->wacom_wac.touch_input)
+ wacom_wac_finger_pre_report(hdev, report);
+
+ for (r = 0; r < report->maxfield; r++) {
+ field = report->field[r];
+
+ if (field->usage[0].collection_index != prev_collection) {
+ if (wacom_wac_collection(hdev, report,
+ field->usage[0].collection_index, field, r) < 0)
+ return;
+ prev_collection = field->usage[0].collection_index;
+ }
+ }
+
+ wacom_wac_battery_report(hdev, report);
}
static int wacom_bpt_touch(struct wacom_wac *wacom)