Good day,

I am currently trying to work on an implementationion
of a driver for the WACOM tablet on openBSD
I am therefore submiting this diff so that it could potentially be evaluated.
Please if you have a moment, could you have a look at this diff?
I have tested it with my Wacom tablet
and it seems to work correctly,
the coding style is normally respected,
but I appologize in advance if my keen eyes have missed out something.

diff --git a/sys/dev/hid/hid.c b/sys/dev/hid/hid.c
index c758764f17a..20c0c501e91 100644
--- a/sys/dev/hid/hid.c
+++ b/sys/dev/hid/hid.c
@@ -657,3 +657,49 @@ hid_is_collection(const void *desc, int size, uint8_t id, 
int32_t usage)
      hid_end_parse(hd);
      return (0);
 }
+
+struct hid_data *
+hid_get_collection_data(const void *desc, int size, int32_t usage, uint32_t 
collection)
+{
+     struct hid_data *hd;
+     struct hid_item hi;
+
+     hd = hid_start_parse(desc, size, hid_all);
+
+     DPRINTF("%s: usage=0x%x\n", __func__, usage);
+     while (hid_get_item(hd, &hi)) {
+           DPRINTF("%s: kind=%d id=%d usage=0x%x(0x%x)\n", __func__,
+                     hi.kind, hi.report_ID, hi.usage, usage);
+           if (hi.kind == hid_collection &&
+               hi.collection == collection && hi.usage == usage){
+                 DPRINTF("%s: found\n", __func__);
+                 return hd;
+           }
+     }
+     DPRINTF("%s: not found\n", __func__);
+     hid_end_parse(hd);
+     return NULL;
+}
+
+int
+hid_get_id_of_collection(const void *desc, int size, int32_t usage, uint32_t 
collection)
+{
+     struct hid_data *hd;
+     struct hid_item hi;
+
+     hd = hid_start_parse(desc, size, hid_all);
+
+     DPRINTF("%s: id=%d usage=0x%x\n", __func__, id, usage);
+     while (hid_get_item(hd, &hi)) {
+           DPRINTF("%s: kind=%d id=%d usage=0x%x(0x%x)\n", __func__,
+                     hi.kind, hi.report_ID, hi.usage, usage);
+           if (hi.kind == hid_collection &&
+               hi.collection == collection && hi.usage == usage){
+                 DPRINTF("%s: found\n", __func__);
+                 return hi.report_ID;
+           }
+     }
+     DPRINTF("%s: not found\n", __func__);
+     hid_end_parse(hd);
+     return 0;
+}
diff --git a/sys/dev/hid/hid.h b/sys/dev/hid/hid.h
index 7400e920bc2..78bc4c403c5 100644
--- a/sys/dev/hid/hid.h
+++ b/sys/dev/hid/hid.h
@@ -93,6 +93,8 @@ int   hid_locate(const void *, int, int32_t, uint8_t, enum 
hid_kind,
 int32_t    hid_get_data(const uint8_t *buf, int, struct hid_location *);
 uint32_t hid_get_udata(const uint8_t *buf, int, struct hid_location *);
 int  hid_is_collection(const void *, int, uint8_t, int32_t);
+struct hid_data *      hid_get_collection_data(const void *, int, int32_t, 
uint32_t);
+int hid_get_id_of_collection(const void *desc, int size, int32_t usage, 
uint32_t collection);

 #endif /* _KERNEL */

@@ -353,6 +355,7 @@ int hid_is_collection(const void *, int, uint8_t, int32_t);
 #define HUD_TOUCHSCREEN            0x0004
 #define HUD_TOUCHPAD         0x0005
 #define HUD_CONFIG           0x000e
+#define HUD_STYLUS           0x0020
 #define HUD_FINGER           0x0022
 #define HUD_TIP_PRESSURE     0x0030
 #define HUD_BARREL_PRESSURE  0x0031
@@ -387,6 +390,12 @@ int      hid_is_collection(const void *, int, uint8_t, 
int32_t);
 #define HUD_CONTACT_MAX            0x0055
 #define HUD_SCAN_TIME        0x0056
 #define HUD_BUTTON_TYPE            0x0059
+#define HUD_SECONDARY_BARREL_SWITCH            0x005A
+#define HUD_WACOM_X          0x0130
+#define HUD_WACOM_Y          0x0131
+#define HUD_WACOM_DISTANCE         0x0132
+#define HUD_WACOM_PAD_BUTTONS00          0x0910
+#define HUD_WACOM_BATTERY          0x1013

 /* Usages, LED */
 #define HUL_NUM_LOCK         0x0001
diff --git a/sys/dev/hid/hidms.c b/sys/dev/hid/hidms.c
index 622d5d9bc33..ec5c8d34d1b 100644
--- a/sys/dev/hid/hidms.c
+++ b/sys/dev/hid/hidms.c
@@ -37,6 +37,7 @@

 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/malloc.h>
 #include <sys/kernel.h>
 #include <sys/device.h>
 #include <sys/ioctl.h>
@@ -61,6 +62,219 @@ int hidmsdebug = 0;
 #define MOUSE_FLAGS_MASK     (HIO_CONST | HIO_RELATIVE)
 #define NOTMOUSE(f)          (((f) & MOUSE_FLAGS_MASK) != HIO_RELATIVE)

+
+int
+stylus_hid_parse(struct hidms *ms, struct hid_data *d, uint32_t *flags) {
+     /* Define stylus reported usages: (maybe macros?) */
+     const uint32_t stylus_usage_tip
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_TIP_SWITCH);
+     const uint32_t stylus_usage_barrel
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_BARREL_SWITCH);
+     const uint32_t stylus_usage_sec_barrel = HID_USAGE2(
+           HUP_WACOM | HUP_DIGITIZERS, HUD_SECONDARY_BARREL_SWITCH);
+     const uint32_t stylus_usage_in_range
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_IN_RANGE);
+     const uint32_t stylus_usage_quality
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_QUALITY);
+     const uint32_t stylus_usage_x
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_WACOM_X);
+     const uint32_t stylus_usage_y
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_WACOM_Y);
+     const uint32_t stylus_usage_pressure
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_TIP_PRESSURE);
+     const uint32_t stylus_usage_distance
+           = HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_WACOM_DISTANCE);
+           
+     struct hid_item h;
+
+     while (hid_get_item(d, &h)) {
+           if (h.kind == hid_input && !(h.flags & HIO_CONST)) {
+                 /* All the possible stylus reported usages go here */
+                 #ifdef HIDMS_DEBUG
+                 printf("stylus usage: 0x%x\n", h.usage);
+                 #endif
+                 switch (h.usage) {
+                 /* Buttons */
+                 case stylus_usage_tip:
+                       DPRINTF("Stylus usage tip set\n");
+                       ms->sc_loc_stylus_btn
+                             [ms->sc_num_stylus_buttons++]
+                             = h.loc;
+                       ms->sc_flags |= HIDMS_TIP;
+                       break;
+                 case stylus_usage_barrel:
+                       DPRINTF("Stylus usage barrel set\n");
+                       ms->sc_loc_stylus_btn
+                             [ms->sc_num_stylus_buttons++]
+                             = h.loc;
+                       ms->sc_flags |= HIDMS_BARREL;
+                       break;
+                 case stylus_usage_sec_barrel:
+                       DPRINTF("Stylus usage secondary barrel set\n");
+                       ms->sc_loc_stylus_btn
+                             [ms->sc_num_stylus_buttons++]
+                             = h.loc;
+                       ms->sc_flags |= HIDMS_SEC_BARREL;
+                       break;
+                 case stylus_usage_in_range:
+                       DPRINTF("Stylus usage in range set\n");
+                       ms->sc_loc_stylus_btn
+                             [ms->sc_num_stylus_buttons++]
+                             = h.loc;
+                       break;
+                 case stylus_usage_quality:
+                       DPRINTF("Stylus usage quality set\n");
+                       ms->sc_loc_stylus_btn
+                             [ms->sc_num_stylus_buttons++]
+                             = h.loc;
+                       break;
+                 /* Axes */
+                 case stylus_usage_x:
+                       DPRINTF("Stylus usage x set\n");
+                       ms->sc_loc_x = h.loc;
+                       ms->sc_tsscale.minx = h.logical_minimum;
+                       ms->sc_tsscale.maxx = h.logical_maximum;
+                       ms->sc_flags |= HIDMS_ABSX;
+                       break;
+                 case stylus_usage_y:
+                       DPRINTF("Stylus usage y set\n");
+                       ms->sc_loc_y = h.loc;
+                       ms->sc_tsscale.miny = h.logical_minimum;
+                       ms->sc_tsscale.maxy = h.logical_maximum;
+                       ms->sc_flags |= HIDMS_ABSY;
+                       break;
+                 case stylus_usage_pressure:
+                       DPRINTF("Stylus usage pressure set\n");
+                       ms->sc_loc_z = h.loc;
+                       ms->sc_tsscale.minz = h.logical_minimum;
+                       ms->sc_tsscale.maxz = h.logical_maximum;
+                       ms->sc_flags |= HIDMS_Z;
+                       break;
+                 case stylus_usage_distance:
+                       DPRINTF("Stylus usage distance set\n");
+                       ms->sc_loc_w = h.loc;
+                       ms->sc_tsscale.minw = h.logical_minimum;
+                       ms->sc_tsscale.maxw = h.logical_maximum;
+                       ms->sc_flags |= HIDMS_W;
+                       break;
+                 default:
+                       #ifdef HIDMS_DEBUG
+                       printf("Unknown stylus usage: 0x%x, please report to 
the devs!\n",
+                             h.usage);
+                       #endif
+                       break;
+                 }
+           }
+           if (h.kind == hid_endcollection)
+                 break;
+     }
+     hid_end_parse(d);
+     if (flags != NULL)
+           *flags = 0;
+     return (0);
+}
+
+int
+pad_buttons_hid_parser(
+     struct hidms *ms, struct hid_data *d, uint32_t *flags) {
+     struct hid_item h;
+
+     while (hid_get_item(d, &h)) {
+           if (h.kind == hid_input && !(h.flags & HIO_CONST)
+                 && h.usage
+                       == HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS,
+                             HUD_WACOM_PAD_BUTTONS00
+                                   | ms->sc_num_pad_buttons)) {
+                 ms->sc_loc_pad_btn[ms->sc_num_pad_buttons++] = h.loc;
+           }
+           if (h.kind == hid_endcollection)
+                 break;
+     }
+     hid_end_parse(d);
+     if (flags != NULL)
+           *flags = 0;
+     return (0);
+}
+
+int
+hidms_wacom_setup(struct device *self, struct hidms *ms, uint32_t quirks,
+     int id, void *desc, int dlen) {
+     struct hid_data *global;
+     uint32_t flags;
+     int i;
+
+     quirks = 0;
+     ms->sc_device = self;
+     ms->sc_rawmode = 1;
+
+     ms->sc_flags = quirks;
+
+     /* Set x,y,z and w to zero by default */
+     ms->sc_loc_x.size = 0;
+     ms->sc_loc_y.size = 0;
+     ms->sc_loc_z.size = 0;
+     ms->sc_loc_w.size = 0;
+
+     if ((global = hid_get_collection_data(desc, dlen,
+                HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_DIGITIZER),
+                HCOLL_APPLICATION))) {
+           hid_end_parse(global);
+
+           struct hid_data *stylus_col;
+           struct hid_data *tablet_keys_col;
+           struct hid_data *battery_col;
+
+           DPRINTF("found the global collection\n");
+           if ((stylus_col = hid_get_collection_data(desc, dlen,
+                      HID_USAGE2(
+                            HUP_WACOM | HUP_DIGITIZERS, HUD_STYLUS),
+                      HCOLL_PHYSICAL))) {
+                 DPRINTF("found stylus collection\n");
+                 stylus_hid_parse(ms, stylus_col, &flags);
+           }
+           if ((tablet_keys_col = hid_get_collection_data(desc, dlen,
+                      HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS,
+                            HUD_TABLET_FKEYS),
+                      HCOLL_PHYSICAL))) {
+                 DPRINTF("found tablet keys collection\n");
+                 pad_buttons_hid_parser(ms, tablet_keys_col, &flags);
+           }
+           if ((battery_col = hid_get_collection_data(desc, dlen,
+                      HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS,
+                            HUD_WACOM_BATTERY),
+                      HCOLL_PHYSICAL))) {
+                 DPRINTF("found battery collection\n");
+                 /* parse and set the battery info */
+                 /* not yet used */
+                 hid_end_parse(battery_col);
+           }
+           /*
+            * Ignore the device config, its not really needed
+            * Ignore the usage 0x10AC which is the debug collection, and
+            * ignore firmware collection and other collections that we
+            * will omit for now
+            */
+     }
+
+     /* Map the pad and stylus buttons to mouse buttons */
+     for (i = 0; i < ms->sc_num_stylus_buttons; i++)
+           memcpy(&(ms->sc_loc_btn[i]), &(ms->sc_loc_stylus_btn[i]),
+                 sizeof(struct hid_location));
+     for (; i < ms->sc_num_pad_buttons + ms->sc_num_stylus_buttons; i++)
+           memcpy(&(ms->sc_loc_btn[i]), &(ms->sc_loc_pad_btn[i]),
+                 sizeof(struct hid_location));
+     ms->sc_num_buttons = i;
+     DPRINTF("Buttons inf\n");
+     #ifdef HIDMS_DEBUG
+     for (i = 0; i < ms->sc_num_buttons; i++)
+           printf("size: 0x%x, pos: 0x%x, count: 0x%x\n",
+                 ms->sc_loc_btn[i].size, ms->sc_loc_btn[i].pos,
+                 ms->sc_loc_btn[i].count);
+     #endif
+     return 0;
+}
+
+
 int
 hidms_setup(struct device *self, struct hidms *ms, uint32_t quirks,
     int id, void *desc, int dlen)
@@ -75,6 +289,10 @@ hidms_setup(struct device *self, struct hidms *ms, uint32_t 
quirks,

      ms->sc_flags = quirks;

+     /* We are setting up a WACOM tablet, not a mouse */
+     if (quirks == HIDMS_WACOM_SETUP)
+           return hidms_wacom_setup(self, ms, quirks, id, desc, dlen);
+
      if (!hid_locate(desc, dlen, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X), id,
          hid_input, &ms->sc_loc_x, &flags))
            ms->sc_loc_x.size = 0;
diff --git a/sys/dev/hid/hidmsvar.h b/sys/dev/hid/hidmsvar.h
index a430b90ddae..55105ec11fa 100644
--- a/sys/dev/hid/hidmsvar.h
+++ b/sys/dev/hid/hidmsvar.h
@@ -36,6 +36,8 @@
 struct tsscale {
      int   minx, maxx;
      int   miny, maxy;
+     int minz, maxz;
+     int minw, maxw;
      int   swapxy;
      int   resx, resy;
 };
@@ -56,13 +58,27 @@ struct hidms {
 #define HIDMS_ERASER         0x0400   /* Eraser switch on a digitiser pen */
 #define HIDMS_MS_BAD_CLASS   0x0800      /* Mouse doesn't identify properly */
 #define HIDMS_VENDOR_BUTTONS 0x1000      /* extra buttons in vendor page */
+#define HIDMS_SEC_BARREL     0x2000    /* Secondary Barrel switch on a 
digitiser pen */
+#define HIDMS_WACOM_SETUP        0xff0d /*Wacom*/

      int         sc_num_buttons;
      u_int32_t   sc_buttons; /* mouse button status */

      struct device     *sc_device;
      struct device     *sc_wsmousedev;
+     /* Wacom */
+    int sc_num_pad_buttons;
+    u_int32_t    sc_pad_buttons; /* left to right, or top to bottom */
+     int sc_num_stylus_buttons;
+    u_int32_t    sc_stylus_buttons; /* tip, barrel switch, secondary barrel 
switch, ... Add the others in order */

+    int sc_in_range;
+    int sc_quality;
+
+    u_int32_t sc_transducer_id_low;
+    u_int32_t sc_transducer_id_high;
+
+    u_int16_t    sc_tool_type;
      /* locators */
      struct hid_location sc_loc_x;
      struct hid_location sc_loc_y;
@@ -70,6 +86,10 @@ struct hidms {
      struct hid_location sc_loc_w;
      struct hid_location sc_loc_btn[MAX_BUTTONS];

+     /* For WACOM tablets */
+    struct hid_location    sc_loc_pad_btn[MAX_BUTTONS];
+    struct hid_location    sc_loc_stylus_btn[MAX_BUTTONS];
+
      struct tsscale    sc_tsscale;
      int         sc_rawmode;
 };
diff --git a/sys/dev/usb/uhidev.c b/sys/dev/usb/uhidev.c
index 26b5b04088d..3c045a26051 100644
--- a/sys/dev/usb/uhidev.c
+++ b/sys/dev/usb/uhidev.c
@@ -283,6 +283,43 @@ uhidev_attach(struct device *parent, struct device *self, 
void *aux)
      free(uha.claimed, M_TEMP, nrepid);
      uha.claimed = NULL;

+     /* Secial case for Wacom tablets */
+     if (uha.uaa->vendor == USB_VENDOR_WACOM) {
+           /*
+            * Get all the needed collections
+            * for now only 3 seem to be of interest,
+            * but more can eventually be added
+            */
+           int repid_collection_list[3] = { 0 };
+           repid_collection_list[0] = hid_get_id_of_collection(desc,
+                 size,
+                 HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUD_STYLUS),
+                 HCOLL_PHYSICAL);
+           repid_collection_list[1]
+                 = hid_get_id_of_collection(desc, size,
+                       HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS,
+                             HUD_TABLET_FKEYS),
+                       HCOLL_PHYSICAL);
+           repid_collection_list[2]
+                 = hid_get_id_of_collection(desc, size,
+                       HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS,
+                             HUD_WACOM_BATTERY),
+                       HCOLL_PHYSICAL);
+
+           for (size_t i = 0; i < 3; i++)
+                 if (repid_collection_list[i]) {
+                       uha.reportid = repid_collection_list[i];
+                       dev = config_found_sm(self, &uha, NULL, NULL);
+                       if (dev == NULL)
+                             printf("Nothing found for repid: "
+                                    "%d\n",
+                                   uha.reportid);
+                       sc->sc_subdevs[uha.reportid]
+                             = (struct uhidev *)dev;
+                 }
+           return;
+     }
+
      for (repid = 0; repid < nrepid; repid++) {
            DPRINTF(("%s: try repid=%d\n", __func__, repid));
            if (hid_report_size(desc, size, hid_input, repid) == 0 &&
diff --git a/sys/dev/usb/usbdevs b/sys/dev/usb/usbdevs
index edb86ebbf5e..8c7cb13a925 100644
--- a/sys/dev/usb/usbdevs
+++ b/sys/dev/usb/usbdevs
@@ -637,6 +637,7 @@ vendor ARDUINO        0x2341      Arduino SA
 vendor TPLINK          0x2357      TP-Link
 vendor WMR       0x2405      West Mountain Radio
 vendor TRIPPLITE 0x2478      Tripp-Lite
+vendor GAOMON          0x256c      Gaomon
 vendor HAILUCK         0x258a      HAILUCK Co., Ltd
 vendor ARUBA           0x2626      Aruba
 vendor XIAOMI          0x2717      Xiaomi
@@ -2109,6 +2110,9 @@ product GARMIN IQUE3600         0x0004      Ique 3600
 product GARMIN DAKOTA20            0x23c0      Dakota 20
 product GARMIN GPSMAP62S     0x2459      GPSmap 62s

+/* Gaomon */
+product GAOMON M10K          0x006e      M10K
+
 /* GCT Semiconductor products */
 product GCTSEMICON INSTALL   0x7f40      GDM720x MASS storage mode     

@@ -4633,6 +4637,7 @@ product WACOM INTUOS_DRAW 0x033b      Intuos Draw 
(CTL-490)
 product WACOM ONE_S          0x037a      One S (CTL-472)
 product WACOM ONE_M          0x037b      One M (CTL-672)
 product WACOM INTUOS_PRO_S   0x0392      Intuos Pro S
+product WACOM INTUOS_S      0x0374  Intuos S (CTL-4100)

 /* WAGO Kontakttechnik products */
 product WAGO SERVICECABLE    0x07a6      Service Cable 750-923
diff --git a/sys/dev/usb/usbdevs.h b/sys/dev/usb/usbdevs.h
index 022a71013f3..75e938e5614 100644
--- a/sys/dev/usb/usbdevs.h
+++ b/sys/dev/usb/usbdevs.h
@@ -644,6 +644,7 @@
 #define    USB_VENDOR_TPLINK 0x2357            /* TP-Link */
 #define    USB_VENDOR_WMR    0x2405            /* West Mountain Radio */
 #define    USB_VENDOR_TRIPPLITE    0x2478            /* Tripp-Lite */
+#define    USB_VENDOR_GAOMON 0x256c            /* Gaomon */
 #define    USB_VENDOR_HAILUCK      0x258a            /* HAILUCK Co., Ltd */
 #define    USB_VENDOR_ARUBA  0x2626            /* Aruba */
 #define    USB_VENDOR_XIAOMI 0x2717            /* Xiaomi */
@@ -2116,6 +2117,9 @@
 #define    USB_PRODUCT_GARMIN_DAKOTA20   0x23c0            /* Dakota 20 */
 #define    USB_PRODUCT_GARMIN_GPSMAP62S  0x2459            /* GPSmap 62s */

+/* Gaomon */
+#define    USB_PRODUCT_GAOMON_M10K 0x006e            /* M10K */
+
 /* GCT Semiconductor products */
 #define    USB_PRODUCT_GCTSEMICON_INSTALL      0x7f40            /* GDM720x 
MASS storage mode */

@@ -4640,6 +4644,7 @@
 #define    USB_PRODUCT_WACOM_ONE_S 0x037a            /* One S (CTL-472) */
 #define    USB_PRODUCT_WACOM_ONE_M 0x037b            /* One M (CTL-672) */
 #define    USB_PRODUCT_WACOM_INTUOS_PRO_S      0x0392            /* Intuos Pro 
S */
+#define    USB_PRODUCT_WACOM_INTUOS_S    0x0374            /* Intuos S 
(CTL-4100) */

 /* WAGO Kontakttechnik products */
 #define    USB_PRODUCT_WAGO_SERVICECABLE 0x07a6            /* Service Cable 
750-923 */
diff --git a/sys/dev/usb/usbdevs_data.h b/sys/dev/usb/usbdevs_data.h
index 92c80f0cede..20ba8354fa7 100644
--- a/sys/dev/usb/usbdevs_data.h
+++ b/sys/dev/usb/usbdevs_data.h
@@ -4337,6 +4337,10 @@ const struct usb_known_product usb_known_products[] = {
          USB_VENDOR_GARMIN, USB_PRODUCT_GARMIN_GPSMAP62S,
          "GPSmap 62s",
      },
+     {
+         USB_VENDOR_GAOMON, USB_PRODUCT_GAOMON_M10K,
+         "M10K",
+     },
      {
          USB_VENDOR_GCTSEMICON, USB_PRODUCT_GCTSEMICON_INSTALL,
          "GDM720x MASS storage mode",
@@ -11905,6 +11909,10 @@ const struct usb_known_product usb_known_products[] = {
          USB_VENDOR_WACOM, USB_PRODUCT_WACOM_INTUOS_PRO_S,
          "Intuos Pro S",
      },
+     {
+         USB_VENDOR_WACOM, USB_PRODUCT_WACOM_INTUOS_S,
+         "Intuos S (CTL-4100)",
+     },
      {
          USB_VENDOR_WAGO, USB_PRODUCT_WAGO_SERVICECABLE,
          "Service Cable 750-923",
@@ -14649,6 +14657,10 @@ const struct usb_known_vendor usb_known_vendors[] = {
          USB_VENDOR_TRIPPLITE,
          "Tripp-Lite",
      },
+     {
+         USB_VENDOR_GAOMON,
+         "Gaomon",
+     },
      {
          USB_VENDOR_HAILUCK,
          "HAILUCK Co., Ltd",
diff --git a/sys/dev/usb/uwacom.c b/sys/dev/usb/uwacom.c
index f9af276a641..fde5b5cecd7 100644
--- a/sys/dev/usb/uwacom.c
+++ b/sys/dev/usb/uwacom.c
@@ -38,11 +38,32 @@
 #define    UWACOM_USE_PRESSURE     0x0001 /* button 0 is flaky, use tip 
pressure */
 #define    UWACOM_BIG_ENDIAN 0x0002 /* XY reporting byte order */

+
+#ifdef UWACOM_DEBUG
+#define UWACOM_PACKET_PRINTF(data, len) do { \
+     printf("Ox");  \
+     for (int i = 0; i < (len); i++) \
+           printf("%02x ",*((data)+i)); \
+     printf("\n");     \
+} while(0)
+#define UWACOM_BUTTON_EVENT(buttons) do { \
+     printf("Current button event: 0x%x\n",buttons); \
+} while (0)
+#endif
+
+#define UWACOM_USE_PRESSURE 0x0001 /* button 0 is flaky, use tip pressure */
+#define UWACOM_BIG_ENDIAN 0x0002   /* xy reporting byte order */
+
 struct uwacom_softc {
      struct uhidev           sc_hdev;
      struct hidms            sc_ms;
      struct hid_location     sc_loc_tip_press;
      int               sc_flags;
+     int sc_x;
+     int sc_y;
+     int sc_z;
+     int sc_w;
+     int sc_moved;
 };

 struct cfdriver uwacom_cd = {
@@ -53,7 +74,8 @@ struct cfdriver uwacom_cd = {
 const struct usb_devno uwacom_devs[] = {
      { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_INTUOS_DRAW },
      { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_ONE_S },
-     { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_ONE_M }
+     { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_ONE_M },
+     { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_INTUOS_S }
 };

 int  uwacom_match(struct device *, void *, void *);
@@ -80,7 +102,9 @@ uwacom_match(struct device *parent, void *match, void *aux)
      struct uhidev_attach_arg *uha = aux;
      int size;
      void *desc;
-
+     #ifdef      UWACOM_DEBUG
+     printf("Wacom Vendor: 0x%x, Product: 0x%x\n",uha->uaa->vendor, 
uha->uaa->product);
+     #endif
      if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha))
            return (UMATCH_NONE);

@@ -90,6 +114,9 @@ uwacom_match(struct device *parent, void *match, void *aux)

      uhidev_get_report_desc(uha->parent, &desc, &size);

+     if (hid_is_collection(desc, size, uha->reportid,
+           HID_USAGE2(HUP_WACOM | HUP_DIGITIZERS, HUG_POINTER)))
+           return UMATCH_IFACECLASS;
      if (!hid_locate(desc, size, HID_USAGE2(HUP_WACOM, HUG_POINTER),
          uha->reportid, hid_input, NULL, NULL))
            return (UMATCH_NONE);
@@ -112,41 +139,26 @@ uwacom_attach(struct device *parent, struct device *self, 
void *aux)
      sc->sc_hdev.sc_udev = uaa->device;
      sc->sc_hdev.sc_report_id = uha->reportid;

-     usbd_set_idle(uha->parent->sc_udev, uha->parent->sc_ifaceno, 0, 0);
+     usbd_status usbd_req_stat = usbd_set_idle(uha->parent->sc_udev, 
uha->parent->sc_ifaceno, 0, 0);
+     if (USBD_NORMAL_COMPLETION != usbd_req_stat)
+           printf("0x%x\n", usbd_req_stat);

      uhidev_get_report_desc(uha->parent, &desc, &size);
      repid = uha->reportid;
-
      sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid);
+     #ifdef UWACOM_DEBUG
+     printf("Wacom packet max size: %d\n",sc->sc_hdev.sc_isize);
+     #endif
      sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid);
-     sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid);
-
-     ms->sc_device = self;
-     ms->sc_rawmode = 1;
-     ms->sc_flags = HIDMS_ABSX | HIDMS_ABSY;
-     ms->sc_num_buttons = 3;
-
-     ms->sc_loc_x.pos = 8;
-     ms->sc_loc_x.size = 16;
-     ms->sc_loc_y.pos = 24;
-     ms->sc_loc_y.size = 16;
-
-     ms->sc_tsscale.minx = 0;
-     ms->sc_tsscale.miny = 0;
-
-     ms->sc_loc_btn[0].pos = 0;
-     ms->sc_loc_btn[0].size = 1;
-     ms->sc_loc_btn[1].pos = 1;
-     ms->sc_loc_btn[1].size = 1;
-     ms->sc_loc_btn[2].pos = 2;
-     ms->sc_loc_btn[2].size = 1;
-
-     if (uha->uaa->product == USB_PRODUCT_WACOM_ONE_S) {
-           static uByte reportbuf[2] = { 0x02, 0x02 };
-           uhidev_set_report(uha->parent, UHID_FEATURE_REPORT, 2,
-               &reportbuf, 2);
-           ms->sc_tsscale.maxx = 15200;
-           ms->sc_tsscale.maxy = 9500;
+     sc->sc_hdev.sc_fsize
+           = hid_report_size(desc, size, hid_feature, repid);
+     /* If a more modern tablet */
+     if (uha->uaa->product == USB_PRODUCT_WACOM_ONE_S
+           || uha->uaa->product == USB_PRODUCT_WACOM_INTUOS_S) {
+           static uByte report_buf[2] = { 0x02, 0x02 };
+           uhidev_set_report(
+                 uha->parent, UHID_FEATURE_REPORT, sc->sc_hdev.sc_report_id, 
&report_buf, sizeof(report_buf));
+           hidms_setup((struct device *)sc, ms, HIDMS_WACOM_SETUP, repid, 
desc, size);
      }

      if (uha->uaa->product == USB_PRODUCT_WACOM_INTUOS_DRAW) {
@@ -174,40 +186,64 @@ uwacom_intr(struct uhidev *addr, void *buf, u_int len)
 {
      struct uwacom_softc *sc = (struct uwacom_softc *)addr;
      struct hidms *ms = &sc->sc_ms;
-     u_int32_t buttons = 0;
+     u_int32_t pad_buttons = 0;
+     u_int32_t stylus_buttons = 0;
      uint8_t *data = (uint8_t *)buf;
-     int i, x, y, pressure;
+     int x, y, pressure,distance;

+     #ifdef UWACOM_DEBUG
+           UWACOM_PACKET_PRINTF(data, len);
+     #endif
      if (ms->sc_enabled == 0)
            return;

-     /* ignore proximity, it will cause invalid button 2 events */
-     if ((data[0] & 0xf0) == 0xc0)
-           return;
-
      x = hid_get_data(data, len, &ms->sc_loc_x);
      y = hid_get_data(data, len, &ms->sc_loc_y);
+     pressure = hid_get_data(data, len, &ms->sc_loc_z);
+     distance = hid_get_data(data, len, &ms->sc_loc_w);
+
+     if (!sc->sc_moved)
+     {
+           sc->sc_x = x;
+           sc->sc_y = y;
+           sc->sc_z = pressure;
+           sc->sc_w = distance;
+           sc->sc_moved = 1;
+     }
+
+     int dx = sc->sc_x - x;
+     int dy = sc->sc_y - y;
+     int dz = sc->sc_z/32 - pressure/32; // Clamp the sensetivity to be in the 
range of -127 to 127
+     int dw = sc->sc_w - distance;
+
+     sc->sc_x = x;
+     sc->sc_y = y;
+     sc->sc_z = pressure;
+     sc->sc_w = distance;

      if (sc->sc_flags & UWACOM_BIG_ENDIAN) {
            x = be16toh(x);
            y = be16toh(y);
      }
-
-     for (i = 0; i < ms->sc_num_buttons; i++)
-           if (hid_get_data(data, len, &ms->sc_loc_btn[i]))
-                 buttons |= (1 << i);
-
-     if (sc->sc_flags & UWACOM_USE_PRESSURE) {
-           pressure = hid_get_data(data, len, &sc->sc_loc_tip_press);
-           if (pressure > 10)
-                 buttons |= 1;
-           else
-                 buttons &= ~1;
-     }
-
-     if (x != 0 || y != 0 || buttons != ms->sc_buttons) {
-           wsmouse_position(ms->sc_wsmousedev, x, y);
-           wsmouse_buttons(ms->sc_wsmousedev, buttons);
+     
+     for (int i = 0; i < ms->sc_num_stylus_buttons; i++)
+           if (hid_get_data(data, len, &ms->sc_loc_stylus_btn[i]))
+                 stylus_buttons |= (1 << i);
+                 
+     for (int i = 0; i < ms->sc_num_pad_buttons; i++)
+           if (hid_get_data(data, len, &ms->sc_loc_pad_btn[i]))
+                 pad_buttons |= (1 << i);
+     
+     
+     #ifdef UWACOM_DEBUG
+           UWACOM_BUTTON_EVENT(pad_buttons);
+           UWACOM_BUTTON_EVENT(stylus_buttons);
+     #endif
+
+     if (x != 0 || y != 0 || pressure != 0 || distance != 0
+                       || pad_buttons != ms->sc_buttons || stylus_buttons != 
ms->sc_buttons) {
+           wsmouse_buttons(ms->sc_wsmousedev, (pad_buttons | stylus_buttons));
+           wsmouse_motion(ms->sc_wsmousedev, -dx, dy, dz, dw);
            wsmouse_input_sync(ms->sc_wsmousedev);
      }
 }


Thanks in advance!

Regards,

Vladimir Meshcheriakov

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