[PATCH for-5.19/uclogic 5/7] HID: uclogic: Differentiate touch ring and touch strip

From: José Expósito
Date: Sun May 08 2022 - 12:02:32 EST

From: Nikolai Kondrashov <spbnick@xxxxxxxxx>

Improve support for touch strips.

Signed-off-by: Nikolai Kondrashov <spbnick@xxxxxxxxx>
Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx>
---
drivers/hid/hid-uclogic-params.c | 84 +++++++++++++++++++++++---------
drivers/hid/hid-uclogic-rdesc.c | 48 ++++++++++++++++++
drivers/hid/hid-uclogic-rdesc.h | 4 ++
3 files changed, 112 insertions(+), 24 deletions(-)

diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c
index 163efd026881..7db63bb77158 100644
--- a/drivers/hid/hid-uclogic-params.c
+++ b/drivers/hid/hid-uclogic-params.c
@@ -808,6 +808,14 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
static const char transition_ver[] = "HUION_T153_160607";
char *ver_ptr = NULL;
const size_t ver_len = sizeof(transition_ver) + 1;
+ __u8 *params_ptr = NULL;
+ size_t params_len = 0;
+ /* Parameters string descriptor of a model with touch ring (HS610) */
+ const __u8 touch_ring_model_params_buf[] = {
+ 0x13, 0x03, 0x70, 0xC6, 0x00, 0x06, 0x7C, 0x00,
+ 0xFF, 0x1F, 0xD8, 0x13, 0x03, 0x0D, 0x10, 0x01,
+ 0x04, 0x3C, 0x3E
+ };

/* Check arguments */
if (params == NULL || hdev == NULL) {
@@ -852,7 +860,8 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
} else {
/* Try to probe v2 pen parameters */
rc = uclogic_params_pen_init_v2(&p.pen, &found,
- NULL, NULL, hdev);
+ &params_ptr, &params_len,
+ hdev);
if (rc != 0) {
hid_err(hdev,
"failed probing pen v2 parameters: %d\n", rc);
@@ -872,24 +881,58 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
goto cleanup;
}

- /* Create v2 frame touch ring parameters */
- rc = uclogic_params_frame_init_with_desc(
+ /* Link from pen sub-report */
+ p.pen.subreport_list[0].value = 0xe0;
+ p.pen.subreport_list[0].id =
+ UCLOGIC_RDESC_V2_FRAME_BUTTONS_ID;
+
+ /* If this is the model with touch ring */
+ if (params_ptr != NULL &&
+ params_len == sizeof(touch_ring_model_params_buf) &&
+ memcmp(params_ptr, touch_ring_model_params_buf,
+ params_len) == 0) {
+ /* Create touch ring parameters */
+ rc = uclogic_params_frame_init_with_desc(
&p.frame_list[1],
uclogic_rdesc_v2_frame_touch_ring_arr,
uclogic_rdesc_v2_frame_touch_ring_size,
UCLOGIC_RDESC_V2_FRAME_TOUCH_ID);
- if (rc != 0) {
- hid_err(hdev,
- "failed creating v2 frame touch ring parameters: %d\n",
- rc);
- goto cleanup;
+ if (rc != 0) {
+ hid_err(hdev,
+ "failed creating v2 frame touch ring parameters: %d\n",
+ rc);
+ goto cleanup;
+ }
+ p.frame_list[1].suffix = "Touch Ring";
+ p.frame_list[1].dev_id_byte =
+ UCLOGIC_RDESC_V2_FRAME_TOUCH_DEV_ID_BYTE;
+ p.frame_list[1].touch_byte = 5;
+ p.frame_list[1].touch_max = 12;
+ p.frame_list[1].touch_flip_at = 7;
+ } else {
+ /* Create touch strip parameters */
+ rc = uclogic_params_frame_init_with_desc(
+ &p.frame_list[1],
+ uclogic_rdesc_v2_frame_touch_strip_arr,
+ uclogic_rdesc_v2_frame_touch_strip_size,
+ UCLOGIC_RDESC_V2_FRAME_TOUCH_ID);
+ if (rc != 0) {
+ hid_err(hdev,
+ "failed creating v2 frame touch strip parameters: %d\n",
+ rc);
+ goto cleanup;
+ }
+ p.frame_list[1].suffix = "Touch Strip";
+ p.frame_list[1].dev_id_byte =
+ UCLOGIC_RDESC_V2_FRAME_TOUCH_DEV_ID_BYTE;
+ p.frame_list[1].touch_byte = 5;
+ p.frame_list[1].touch_max = 8;
}
- p.frame_list[1].suffix = "Touch Ring";
- p.frame_list[1].dev_id_byte =
- UCLOGIC_RDESC_V2_FRAME_TOUCH_DEV_ID_BYTE;
- p.frame_list[1].touch_byte = 5;
- p.frame_list[1].touch_max = 12;
- p.frame_list[1].touch_flip_at = 7;
+
+ /* Link from pen sub-report */
+ p.pen.subreport_list[1].value = 0xf0;
+ p.pen.subreport_list[1].id =
+ UCLOGIC_RDESC_V2_FRAME_TOUCH_ID;

/* Create v2 frame dial parameters */
rc = uclogic_params_frame_init_with_desc(
@@ -908,19 +951,11 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
UCLOGIC_RDESC_V2_FRAME_DIAL_DEV_ID_BYTE;
p.frame_list[2].bitmap_dial_byte = 5;

- /*
- * Link button and touch ring subreports from pen
- * reports
- */
- p.pen.subreport_list[0].value = 0xe0;
- p.pen.subreport_list[0].id =
- UCLOGIC_RDESC_V2_FRAME_BUTTONS_ID;
- p.pen.subreport_list[1].value = 0xf0;
- p.pen.subreport_list[1].id =
- UCLOGIC_RDESC_V2_FRAME_TOUCH_ID;
+ /* Link from pen sub-report */
p.pen.subreport_list[2].value = 0xf1;
p.pen.subreport_list[2].id =
UCLOGIC_RDESC_V2_FRAME_DIAL_ID;
+
goto output;
}
hid_dbg(hdev, "pen v2 parameters not found\n");
@@ -961,6 +996,7 @@ static int uclogic_params_huion_init(struct uclogic_params *params,
memset(&p, 0, sizeof(p));
rc = 0;
cleanup:
+ kfree(params_ptr);
kfree(ver_ptr);
uclogic_params_cleanup(&p);
return rc;
diff --git a/drivers/hid/hid-uclogic-rdesc.c b/drivers/hid/hid-uclogic-rdesc.c
index e2bd3a91e6fd..3c3d4e8780dc 100644
--- a/drivers/hid/hid-uclogic-rdesc.c
+++ b/drivers/hid/hid-uclogic-rdesc.c
@@ -761,6 +761,54 @@ const __u8 uclogic_rdesc_v2_frame_touch_ring_arr[] = {
const size_t uclogic_rdesc_v2_frame_touch_ring_size =
sizeof(uclogic_rdesc_v2_frame_touch_ring_arr);

+/* Fixed report descriptor for (tweaked) v2 frame touch strip reports */
+const __u8 uclogic_rdesc_v2_frame_touch_strip_arr[] = {
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x09, 0x07, /* Usage (Keypad), */
+ 0xA1, 0x01, /* Collection (Application), */
+ 0x85, UCLOGIC_RDESC_V2_FRAME_TOUCH_ID,
+ /* Report ID (TOUCH_ID), */
+ 0x14, /* Logical Minimum (0), */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x09, 0x39, /* Usage (Tablet Function Keys), */
+ 0xA0, /* Collection (Physical), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x05, 0x09, /* Usage Page (Button), */
+ 0x09, 0x01, /* Usage (01h), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x07, /* Report Count (7), */
+ 0x81, 0x01, /* Input (Constant), */
+ 0x75, 0x08, /* Report Size (8), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x81, 0x01, /* Input (Constant), */
+ 0x05, 0x0D, /* Usage Page (Digitizer), */
+ 0x0A, 0xFF, 0xFF, /* Usage (FFFFh), */
+ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x05, 0x01, /* Usage Page (Desktop), */
+ 0x09, 0x38, /* Usage (Wheel), */
+ 0x95, 0x01, /* Report Count (1), */
+ 0x15, 0x00, /* Logical Minimum (0), */
+ 0x25, 0x07, /* Logical Maximum (7), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x09, 0x30, /* Usage (X), */
+ 0x09, 0x31, /* Usage (Y), */
+ 0x14, /* Logical Minimum (0), */
+ 0x25, 0x01, /* Logical Maximum (1), */
+ 0x75, 0x01, /* Report Size (1), */
+ 0x95, 0x02, /* Report Count (2), */
+ 0x81, 0x02, /* Input (Variable), */
+ 0x95, 0x2E, /* Report Count (46), */
+ 0x81, 0x01, /* Input (Constant), */
+ 0xC0, /* End Collection, */
+ 0xC0 /* End Collection */
+};
+const size_t uclogic_rdesc_v2_frame_touch_strip_size =
+ sizeof(uclogic_rdesc_v2_frame_touch_strip_arr);
+
/* Fixed report descriptor for (tweaked) v2 frame dial reports */
const __u8 uclogic_rdesc_v2_frame_dial_arr[] = {
0x05, 0x01, /* Usage Page (Desktop), */
diff --git a/drivers/hid/hid-uclogic-rdesc.h b/drivers/hid/hid-uclogic-rdesc.h
index b7bbaa70261e..0c6e95e8bde7 100644
--- a/drivers/hid/hid-uclogic-rdesc.h
+++ b/drivers/hid/hid-uclogic-rdesc.h
@@ -138,6 +138,10 @@ extern const size_t uclogic_rdesc_v2_frame_buttons_size;
extern const __u8 uclogic_rdesc_v2_frame_touch_ring_arr[];
extern const size_t uclogic_rdesc_v2_frame_touch_ring_size;

+/* Fixed report descriptor for (tweaked) v2 frame touch strip reports */
+extern const __u8 uclogic_rdesc_v2_frame_touch_strip_arr[];
+extern const size_t uclogic_rdesc_v2_frame_touch_strip_size;
+
/* Device ID byte offset in v2 frame touch ring/strip reports */
#define UCLOGIC_RDESC_V2_FRAME_TOUCH_DEV_ID_BYTE 0x4

--
2.25.1