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path: root/drivers/input/tablet/wacom_sys.c
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Diffstat (limited to 'drivers/input/tablet/wacom_sys.c')
-rw-r--r--drivers/input/tablet/wacom_sys.c87
1 files changed, 42 insertions, 45 deletions
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index aaf23aeae2e..79b69ea47f7 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -221,39 +221,6 @@ static int wacom_calc_hid_res(int logical_extents, int physical_extents,
return logical_extents / physical_extents;
}
-/*
- * The physical dimension specified by the HID descriptor is likely not in
- * the "100th of a mm" units expected by wacom_calculate_touch_res. This
- * function adjusts the value of [xy]_phy based on the unit and exponent
- * provided by the HID descriptor. If an error occurs durring conversion
- * (e.g. from the unit being left unspecified) [xy]_phy is not modified.
- */
-static void wacom_fix_phy_from_hid(struct wacom_features *features)
-{
- int xres = wacom_calc_hid_res(features->x_max, features->x_phy,
- features->unit, features->unitExpo);
- int yres = wacom_calc_hid_res(features->y_max, features->y_phy,
- features->unit, features->unitExpo);
-
- if (xres > 0 && yres > 0) {
- features->x_phy = (100 * features->x_max) / xres;
- features->y_phy = (100 * features->y_max) / yres;
- }
-}
-
-/*
- * Static values for max X/Y and resolution of Pen interface is stored in
- * features. This mean physical size of active area can be computed.
- * This is useful to do when Pen and Touch have same active area of tablet.
- * This means for Touch device, we only need to find max X/Y value and we
- * have enough information to compute resolution of touch.
- */
-static void wacom_set_phy_from_res(struct wacom_features *features)
-{
- features->x_phy = (features->x_max * 100) / features->x_resolution;
- features->y_phy = (features->y_max * 100) / features->y_resolution;
-}
-
static int wacom_parse_logical_collection(unsigned char *report,
struct wacom_features *features)
{
@@ -265,8 +232,6 @@ static int wacom_parse_logical_collection(unsigned char *report,
features->pktlen = WACOM_PKGLEN_BBTOUCH3;
features->device_type = BTN_TOOL_FINGER;
- wacom_set_phy_from_res(features);
-
features->x_max = features->y_max =
get_unaligned_le16(&report[10]);
@@ -640,9 +605,6 @@ static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
}
}
error = wacom_parse_hid(intf, hid_desc, features);
- if (error)
- goto out;
- wacom_fix_phy_from_hid(features);
out:
return error;
@@ -1228,7 +1190,6 @@ static void wacom_wireless_work(struct work_struct *work)
*((struct wacom_features *)id->driver_info);
wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
wacom_wac2->features.device_type = BTN_TOOL_FINGER;
- wacom_set_phy_from_res(&wacom_wac2->features);
wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
error = wacom_register_input(wacom2);
if (error)
@@ -1251,6 +1212,33 @@ fail1:
return;
}
+/*
+ * Not all devices report physical dimensions from HID.
+ * Compute the default from hardcoded logical dimension
+ * and resolution before driver overwrites them.
+ */
+static void wacom_set_default_phy(struct wacom_features *features)
+{
+ if (features->x_resolution) {
+ features->x_phy = (features->x_max * 100) /
+ features->x_resolution;
+ features->y_phy = (features->y_max * 100) /
+ features->y_resolution;
+ }
+}
+
+static void wacom_calculate_res(struct wacom_features *features)
+{
+ features->x_resolution = wacom_calc_hid_res(features->x_max,
+ features->x_phy,
+ features->unit,
+ features->unitExpo);
+ features->y_resolution = wacom_calc_hid_res(features->y_max,
+ features->y_phy,
+ features->unit,
+ features->unitExpo);
+}
+
static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
@@ -1297,6 +1285,9 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
endpoint = &intf->cur_altsetting->endpoint[0].desc;
+ /* set the default size in case we do not get them from hid */
+ wacom_set_default_phy(features);
+
/* Retrieve the physical and logical size for touch devices */
error = wacom_retrieve_hid_descriptor(intf, features);
if (error)
@@ -1312,8 +1303,6 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
features->device_type = BTN_TOOL_FINGER;
features->pktlen = WACOM_PKGLEN_BBTOUCH3;
- wacom_set_phy_from_res(features);
-
features->x_max = 4096;
features->y_max = 4096;
} else {
@@ -1323,6 +1312,13 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
wacom_setup_device_quirks(features);
+ /* set unit to "100th of a mm" for devices not reported by HID */
+ if (!features->unit) {
+ features->unit = 0x11;
+ features->unitExpo = 16 - 3;
+ }
+ wacom_calculate_res(features);
+
strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
@@ -1334,7 +1330,6 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
" Pen" : " Finger",
sizeof(wacom_wac->name));
-
other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
other_dev = dev;
@@ -1366,8 +1361,10 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
usb_set_intfdata(intf, wacom);
if (features->quirks & WACOM_QUIRK_MONITOR) {
- if (usb_submit_urb(wacom->irq, GFP_KERNEL))
+ if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
+ error = -EIO;
goto fail5;
+ }
}
return 0;
@@ -1422,8 +1419,8 @@ static int wacom_resume(struct usb_interface *intf)
wacom_query_tablet_data(intf, features);
wacom_led_control(wacom);
- if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
- && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
+ if ((wacom->open || (features->quirks & WACOM_QUIRK_MONITOR)) &&
+ usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
rv = -EIO;
mutex_unlock(&wacom->lock);