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Message-ID: <20240502042335.15611-1-mmyangfl@gmail.com>
Date: Thu, 2 May 2024 12:23:31 +0800
From: David Yang <mmyangfl@...il.com>
To: linux-input@...r.kernel.org
Cc: David Yang <mmyangfl@...il.com>,
Jiri Kosina <jikos@...nel.org>,
Benjamin Tissoires <bentiss@...nel.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH] HID: kye: Change Device Usage from Puck to Mouse
Change device type because
a. it is exactly a mouse, with left/right buttons and scroll wheel;
b. it does not have visible marks or crosshairs, thus does not provide
higher accuracy than stylus.
Signed-off-by: David Yang <mmyangfl@...il.com>
---
drivers/hid/hid-kye.c | 75 +++++++++++++++++++++++++------------------
1 file changed, 44 insertions(+), 31 deletions(-)
diff --git a/drivers/hid/hid-kye.c b/drivers/hid/hid-kye.c
index eb9bf2829937..70ceb9437332 100644
--- a/drivers/hid/hid-kye.c
+++ b/drivers/hid/hid-kye.c
@@ -209,7 +209,7 @@ static const __u8 pensketch_t609a_control_rdesc[] = {
0xC0 /* End Collection */
};
-/* Fix indexes in kye_tablet_fixup if you change this */
+/* Fix indexes in kye_tablet_fixup() if you change this */
static const __u8 kye_tablet_rdesc[] = {
0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
0x09, 0x01, /* Usage (01h), */
@@ -262,12 +262,16 @@ static const __u8 kye_tablet_rdesc[] = {
0x27, 0xFF, 0x07, 0x00, 0x00, /* Logical Maximum (2047), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
- 0xC0, /* End Collection, */
- 0x05, 0x0D, /* Usage Page (Digitizer), */
- 0x09, 0x21, /* Usage (Puck), */
+ 0xC0 /* End Collection, */
+};
+
+/* Fix indexes in kye_tablet_fixup() if you change this */
+static const __u8 kye_tablet_mouse_rdesc[] = {
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x09, 0x02, /* Usage (Mouse), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x11, /* Report ID (17), */
- 0x09, 0x21, /* Usage (Puck), */
+ 0x09, 0x01, /* Usage (Pointer), */
0xA0, /* Collection (Physical), */
0x05, 0x09, /* Usage Page (Button), */
0x19, 0x01, /* Usage Minimum (01h), */
@@ -280,7 +284,7 @@ static const __u8 kye_tablet_rdesc[] = {
0x95, 0x04, /* Report Count (4), */
0x81, 0x01, /* Input (Constant), */
0x05, 0x0D, /* Usage Page (Digitizer), */
- 0x09, 0x32, /* Usage (In Range), */
+ 0x09, 0x37, /* Usage (Data Valid), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x02, /* Input (Variable), */
0x05, 0x01, /* Usage Page (Desktop), */
@@ -317,7 +321,7 @@ static const struct kye_tablet_info {
__s32 y_physical_maximum;
__s8 unit_exponent;
__s8 unit;
- bool has_punk;
+ bool has_mouse;
unsigned int control_rsize;
const __u8 *control_rdesc;
} kye_tablets_info[] = {
@@ -402,7 +406,7 @@ static __u8 *kye_consumer_control_fixup(struct hid_device *hdev, __u8 *rdesc,
static __u8 *kye_tablet_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize)
{
const struct kye_tablet_info *info;
- unsigned int newsize;
+ __u8 *newdesc = rdesc;
if (*rsize < sizeof(kye_tablet_rdesc)) {
hid_warn(hdev,
@@ -420,36 +424,45 @@ static __u8 *kye_tablet_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int
return rdesc;
}
- newsize = info->has_punk ? sizeof(kye_tablet_rdesc) : 112;
- memcpy(rdesc, kye_tablet_rdesc, newsize);
-
- put_unaligned_le32(info->x_logical_maximum, rdesc + 66);
- put_unaligned_le32(info->x_physical_maximum, rdesc + 72);
- rdesc[77] = info->unit;
- rdesc[79] = info->unit_exponent;
- put_unaligned_le32(info->y_logical_maximum, rdesc + 87);
- put_unaligned_le32(info->y_physical_maximum, rdesc + 92);
- put_unaligned_le32(info->pressure_logical_maximum, rdesc + 104);
-
- if (info->has_punk) {
- put_unaligned_le32(info->x_logical_maximum, rdesc + 156);
- put_unaligned_le32(info->x_physical_maximum, rdesc + 162);
- rdesc[167] = info->unit;
- rdesc[169] = info->unit_exponent;
- put_unaligned_le32(info->y_logical_maximum, rdesc + 177);
- put_unaligned_le32(info->y_physical_maximum, rdesc + 182);
+ memcpy(newdesc, kye_tablet_rdesc, sizeof(kye_tablet_rdesc));
+
+ put_unaligned_le32(info->x_logical_maximum, newdesc + 66);
+ put_unaligned_le32(info->x_physical_maximum, newdesc + 72);
+ newdesc[77] = info->unit;
+ newdesc[79] = info->unit_exponent;
+ put_unaligned_le32(info->y_logical_maximum, newdesc + 87);
+ put_unaligned_le32(info->y_physical_maximum, newdesc + 92);
+ put_unaligned_le32(info->pressure_logical_maximum, newdesc + 104);
+
+ newdesc += sizeof(kye_tablet_rdesc);
+
+ if (info->has_mouse) {
+ if (newdesc + sizeof(kye_tablet_mouse_rdesc) > rdesc + *rsize)
+ hid_err(hdev, "control desc unexpectedly large\n");
+ else {
+ memcpy(newdesc, kye_tablet_mouse_rdesc, sizeof(kye_tablet_mouse_rdesc));
+
+ put_unaligned_le32(info->x_logical_maximum, newdesc + 44);
+ put_unaligned_le32(info->x_physical_maximum, newdesc + 50);
+ newdesc[55] = info->unit;
+ newdesc[57] = info->unit_exponent;
+ put_unaligned_le32(info->y_logical_maximum, newdesc + 65);
+ put_unaligned_le32(info->y_physical_maximum, newdesc + 70);
+
+ newdesc += sizeof(kye_tablet_mouse_rdesc);
+ }
}
if (info->control_rsize) {
- if (newsize + info->control_rsize > *rsize)
- hid_err(hdev, "control rdesc unexpectedly large");
+ if (newdesc + info->control_rsize > rdesc + *rsize)
+ hid_err(hdev, "control desc unexpectedly large\n");
else {
- memcpy(rdesc + newsize, info->control_rdesc, info->control_rsize);
- newsize += info->control_rsize;
+ memcpy(newdesc, info->control_rdesc, info->control_rsize);
+ newdesc += info->control_rsize;
}
}
- *rsize = newsize;
+ *rsize = newdesc - rdesc;
return rdesc;
}
--
2.43.0
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