From 401d7d108fc19595f6a7d7dd7d553458155e31fa Mon Sep 17 00:00:00 2001 From: Ping Cheng Date: Sun, 28 Jul 2013 00:38:54 -0700 Subject: [PATCH] Input: wacom - integrate resolution calculation Reviewed-by: Jason Gerecke Tested-by: Jason Gerecke Signed-off-by: Ping Cheng Signed-off-by: Dmitry Torokhov --- drivers/input/tablet/wacom_sys.c | 79 +++++++++++++++----------------- drivers/input/tablet/wacom_wac.c | 19 ++------ 2 files changed, 41 insertions(+), 57 deletions(-) diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index aaf23aeae2ea..1ad3e07986b4 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; diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c index 518282da6d85..541197b7b973 100644 --- a/drivers/input/tablet/wacom_wac.c +++ b/drivers/input/tablet/wacom_wac.c @@ -1443,13 +1443,6 @@ void wacom_setup_device_quirks(struct wacom_features *features) } } -static unsigned int wacom_calculate_touch_res(unsigned int logical_max, - unsigned int physical_max) -{ - /* Touch physical dimensions are in 100th of mm */ - return (logical_max * 100) / physical_max; -} - static void wacom_abs_set_axis(struct input_dev *input_dev, struct wacom_wac *wacom_wac) { @@ -1473,11 +1466,9 @@ static void wacom_abs_set_axis(struct input_dev *input_dev, input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, features->y_fuzz, 0); input_abs_set_res(input_dev, ABS_X, - wacom_calculate_touch_res(features->x_max, - features->x_phy)); + features->x_resolution); input_abs_set_res(input_dev, ABS_Y, - wacom_calculate_touch_res(features->y_max, - features->y_phy)); + features->y_resolution); } if (features->touch_max > 1) { @@ -1486,11 +1477,9 @@ static void wacom_abs_set_axis(struct input_dev *input_dev, input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, features->y_max, features->y_fuzz, 0); input_abs_set_res(input_dev, ABS_MT_POSITION_X, - wacom_calculate_touch_res(features->x_max, - features->x_phy)); + features->x_resolution); input_abs_set_res(input_dev, ABS_MT_POSITION_Y, - wacom_calculate_touch_res(features->y_max, - features->y_phy)); + features->y_resolution); } } }