We want to keep device-specific quirks as contained as possible so that the
the code remains maintainable. Our 'wacom_setup_device_quirks' function is
the usual place for this, but some quirks need to be applied to the HID
descriptor as it is parsed. This commit introduces a new function which is
called for each usage so that any HID-specific quirks can be applied. The
function now houses quirks that were being done in 'wacom_feature_mapping'
and 'wacom_usage_mapping'.
Signed-off-by: Jason Gerecke <jason.gerecke@xxxxxxxxx>
---
drivers/hid/wacom_sys.c | 92 ++++++++++++++++++++++++-----------------
1 file changed, 54 insertions(+), 38 deletions(-)
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index fd40037c2bcc..463eaf5f1290 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -210,6 +210,57 @@ static int wacom_calc_hid_res(int logical_extents, int physical_extents,
return hidinput_calc_abs_res(&field, ABS_X);
}
+static void wacom_hid_usage_quirk(struct hid_device *hdev,
+ struct hid_field *field, struct hid_usage *usage)
+{
+ struct wacom *wacom = hid_get_drvdata(hdev);
+ struct wacom_features *features = &wacom->wacom_wac.features;
+ unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
+
+ /*
+ * The Dell Canvas 27 needs to be switched to its vendor-defined
+ * report to provide the best resolution.
+ */
+ if (hdev->vendor == USB_VENDOR_ID_WACOM &&
+ hdev->product == 0x4200 &&
+ field->application == HID_UP_MSVENDOR) {
+ wacom->wacom_wac.mode_report = field->report->id;
+ wacom->wacom_wac.mode_value = 2;
+ }
+
+ /*
+ * ISDv4 devices which predate HID's adoption of the
+ * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
+ * position instead. We can accurately detect if a
+ * usage with that value should be HID_DG_BARRELSWITCH2
+ * based on the surrounding usages, which have remained
+ * constant across generations.
+ */
+ if (features->type == HID_GENERIC &&
+ usage->hid == 0x000D0000 &&
+ field->application == HID_DG_PEN &&
+ field->physical == HID_DG_STYLUS) {
+ int i = usage->usage_index;
+
+ if (i-4 >= 0 && i+1 < field->maxusage &&
+ field->usage[i-4].hid == HID_DG_TIPSWITCH &&
+ field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
+ field->usage[i-2].hid == HID_DG_ERASER &&
+ field->usage[i-1].hid == HID_DG_INVERT &&
+ field->usage[i+1].hid == HID_DG_INRANGE) {
+ usage->hid = HID_DG_BARRELSWITCH2;
+ }
+ }
+
+ /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
+ if (hdev->vendor == USB_VENDOR_ID_WACOM &&
+ hdev->product == 0x0358 &&
+ WACOM_PEN_FIELD(field) &&
+ equivalent_usage == HID_GD_Y) {
+ field->logical_maximum = 43200;
+ }
+}
+
static void wacom_feature_mapping(struct hid_device *hdev,
struct hid_field *field, struct hid_usage *usage)
{
@@ -221,6 +272,8 @@ static void wacom_feature_mapping(struct hid_device *hdev,
int ret;
u32 n;
+ wacom_hid_usage_quirk(hdev, field, usage);
+
switch (equivalent_usage) {
case HID_DG_CONTACTMAX:
/* leave touch_max as is if predefined */
@@ -300,13 +353,6 @@ static void wacom_feature_mapping(struct hid_device *hdev,
kfree(data);
break;
}
-
- if (hdev->vendor == USB_VENDOR_ID_WACOM &&
- hdev->product == 0x4200 /* Dell Canvas 27 */ &&
- field->application == HID_UP_MSVENDOR) {
- wacom->wacom_wac.mode_report = field->report->id;
- wacom->wacom_wac.mode_value = 2;
- }
}
/*
@@ -361,37 +407,7 @@ static void wacom_usage_mapping(struct hid_device *hdev,
else
return;
- /*
- * ISDv4 devices which predate HID's adoption of the
- * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
- * position instead. We can accurately detect if a
- * usage with that value should be HID_DG_BARRELSWITCH2
- * based on the surrounding usages, which have remained
- * constant across generations.
- */
- if (features->type == HID_GENERIC &&
- usage->hid == 0x000D0000 &&
- field->application == HID_DG_PEN &&
- field->physical == HID_DG_STYLUS) {
- int i = usage->usage_index;
-
- if (i-4 >= 0 && i+1 < field->maxusage &&
- field->usage[i-4].hid == HID_DG_TIPSWITCH &&
- field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
- field->usage[i-2].hid == HID_DG_ERASER &&
- field->usage[i-1].hid == HID_DG_INVERT &&
- field->usage[i+1].hid == HID_DG_INRANGE) {
- usage->hid = HID_DG_BARRELSWITCH2;
- }
- }
-
- /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
- if (hdev->vendor == USB_VENDOR_ID_WACOM &&
- hdev->product == 0x0358 &&
- WACOM_PEN_FIELD(field) &&
- wacom_equivalent_usage(usage->hid) == HID_GD_Y) {
- field->logical_maximum = 43200;
- }
+ wacom_hid_usage_quirk(hdev, field, usage);
switch (usage->hid) {
case HID_GD_X:
--
2.18.0
--
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