diff options
| author | Chris Bagwell <chris@cnpbagwell.com> | 2011-10-27 09:32:52 +0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-10-27 09:36:06 +0400 |
| commit | 4134361af6e099e5f477663fed1d49f0cf29eb4f (patch) | |
| tree | 210cb39d920208495d3f310a08d68454fd1f8e57 | |
| parent | c5981411f60c31f0dff6f0f98d2d3711384badaf (diff) | |
| download | linux-4134361af6e099e5f477663fed1d49f0cf29eb4f.tar.xz | |
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>
| -rw-r--r-- | drivers/input/tablet/wacom_sys.c | 49 | ||||
| -rw-r--r-- | drivers/input/tablet/wacom_wac.h | 1 |
2 files changed, 48 insertions, 2 deletions
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index f35ed7cb10a9..ab498e480f3b 100644 --- a/drivers/input/tablet/wacom_sys.c +++ b/drivers/input/tablet/wacom_sys.c @@ -28,7 +28,9 @@ #define HID_USAGE_Y_TILT 0x3e #define HID_USAGE_FINGER 0x22 #define HID_USAGE_STYLUS 0x20 -#define HID_COLLECTION 0xc0 +#define HID_COLLECTION 0xa1 +#define HID_COLLECTION_LOGICAL 0x02 +#define HID_COLLECTION_END 0xc0 enum { WCM_UNDEFINED = 0, @@ -165,6 +167,35 @@ static void wacom_close(struct input_dev *dev) usb_autopm_put_interface(wacom->intf); } +static int wacom_parse_logical_collection(unsigned char *report, + struct wacom_features *features) +{ + int length = 0; + + if (features->type == BAMBOO_PT) { + + /* Logical collection is only used by 3rd gen Bamboo Touch */ + features->pktlen = WACOM_PKGLEN_BBTOUCH3; + features->device_type = BTN_TOOL_DOUBLETAP; + + /* + * Stylus and Touch have same active area + * so compute physical size based on stylus + * data before its overwritten. + */ + features->x_phy = + (features->x_max * features->x_resolution) / 100; + features->y_phy = + (features->y_max * features->y_resolution) / 100; + + features->x_max = features->y_max = + get_unaligned_le16(&report[10]); + + length = 11; + } + return length; +} + /* * Interface Descriptor of wacom devices can be incomplete and * inconsistent so wacom_features table is used to store stylus @@ -193,6 +224,10 @@ static void wacom_close(struct input_dev *dev) * X/Y maximum as well as the physical size of tablet. Since touch * interfaces haven't supported pressure or distance, this is enough * information to override invalid values in the wacom_features table. + * + * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical + * Collection. Instead they define a Logical Collection with a single + * Logical Maximum for both X and Y. */ static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc, @@ -355,10 +390,20 @@ static int wacom_parse_hid(struct usb_interface *intf, } break; - case HID_COLLECTION: + case HID_COLLECTION_END: /* reset UsagePage and Finger */ finger = usage = 0; break; + + case HID_COLLECTION: + i++; + switch (report[i]) { + case HID_COLLECTION_LOGICAL: + i += wacom_parse_logical_collection(&report[i], + features); + break; + } + break; } } diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h index 53eb71b68330..af94e6d9d6a9 100644 --- a/drivers/input/tablet/wacom_wac.h +++ b/drivers/input/tablet/wacom_wac.h @@ -22,6 +22,7 @@ #define WACOM_PKGLEN_TPC1FG 5 #define WACOM_PKGLEN_TPC2FG 14 #define WACOM_PKGLEN_BBTOUCH 20 +#define WACOM_PKGLEN_BBTOUCH3 64 /* device IDs */ #define STYLUS_DEVICE_ID 0x02 |