Input: wacom - read 3rd gen Bamboo Touch HID data
Override invalid pen based pktlen and x/y_max with touch values from HID report. Since active area of pen and touch are same on these devices, set physical x/y size while pen x/y_max and resolution are still valid. Signed-off-by: Chris Bagwell <chris@cnpbagwell.com> Acked-by: Ping Cheng <pingc@wacom.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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@ -28,7 +28,9 @@
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#define HID_USAGE_Y_TILT 0x3e
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#define HID_USAGE_Y_TILT 0x3e
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#define HID_USAGE_FINGER 0x22
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#define HID_USAGE_FINGER 0x22
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#define HID_USAGE_STYLUS 0x20
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#define HID_USAGE_STYLUS 0x20
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#define HID_COLLECTION 0xc0
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#define HID_COLLECTION 0xa1
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#define HID_COLLECTION_LOGICAL 0x02
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#define HID_COLLECTION_END 0xc0
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enum {
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enum {
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WCM_UNDEFINED = 0,
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WCM_UNDEFINED = 0,
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@ -165,6 +167,35 @@ static void wacom_close(struct input_dev *dev)
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usb_autopm_put_interface(wacom->intf);
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usb_autopm_put_interface(wacom->intf);
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}
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}
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static int wacom_parse_logical_collection(unsigned char *report,
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struct wacom_features *features)
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{
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int length = 0;
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if (features->type == BAMBOO_PT) {
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/* Logical collection is only used by 3rd gen Bamboo Touch */
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features->pktlen = WACOM_PKGLEN_BBTOUCH3;
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features->device_type = BTN_TOOL_DOUBLETAP;
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/*
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* Stylus and Touch have same active area
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* so compute physical size based on stylus
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* data before its overwritten.
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*/
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features->x_phy =
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(features->x_max * features->x_resolution) / 100;
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features->y_phy =
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(features->y_max * features->y_resolution) / 100;
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features->x_max = features->y_max =
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get_unaligned_le16(&report[10]);
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length = 11;
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}
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return length;
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}
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/*
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/*
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* Interface Descriptor of wacom devices can be incomplete and
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* Interface Descriptor of wacom devices can be incomplete and
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* inconsistent so wacom_features table is used to store stylus
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* inconsistent so wacom_features table is used to store stylus
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@ -193,6 +224,10 @@ static void wacom_close(struct input_dev *dev)
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* X/Y maximum as well as the physical size of tablet. Since touch
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* X/Y maximum as well as the physical size of tablet. Since touch
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* interfaces haven't supported pressure or distance, this is enough
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* interfaces haven't supported pressure or distance, this is enough
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* information to override invalid values in the wacom_features table.
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* information to override invalid values in the wacom_features table.
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*
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* 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
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* Collection. Instead they define a Logical Collection with a single
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* Logical Maximum for both X and Y.
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*/
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*/
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static int wacom_parse_hid(struct usb_interface *intf,
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static int wacom_parse_hid(struct usb_interface *intf,
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struct hid_descriptor *hid_desc,
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struct hid_descriptor *hid_desc,
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@ -355,10 +390,20 @@ static int wacom_parse_hid(struct usb_interface *intf,
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}
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}
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break;
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break;
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case HID_COLLECTION:
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case HID_COLLECTION_END:
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/* reset UsagePage and Finger */
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/* reset UsagePage and Finger */
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finger = usage = 0;
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finger = usage = 0;
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break;
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break;
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case HID_COLLECTION:
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i++;
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switch (report[i]) {
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case HID_COLLECTION_LOGICAL:
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i += wacom_parse_logical_collection(&report[i],
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features);
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break;
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}
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break;
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}
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}
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}
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}
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@ -22,6 +22,7 @@
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#define WACOM_PKGLEN_TPC1FG 5
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#define WACOM_PKGLEN_TPC1FG 5
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#define WACOM_PKGLEN_TPC2FG 14
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#define WACOM_PKGLEN_TPC2FG 14
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#define WACOM_PKGLEN_BBTOUCH 20
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#define WACOM_PKGLEN_BBTOUCH 20
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#define WACOM_PKGLEN_BBTOUCH3 64
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/* device IDs */
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/* device IDs */
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#define STYLUS_DEVICE_ID 0x02
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#define STYLUS_DEVICE_ID 0x02
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