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authorDan Streetman <ddstreet@ieee.org>2009-01-11 10:44:22 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-01-11 10:45:51 +0300
commitc9cbf3d3b35f198fab39e98d696312dd0b97a69a (patch)
tree3cdd49931344e82678c6820c4dc822922a23e4b2 /drivers/input/touchscreen/usbtouchscreen.c
parent9334e90d5ac5ee1fa6d8b75acb7c64a8907787d1 (diff)
downloadlinux-c9cbf3d3b35f198fab39e98d696312dd0b97a69a.tar.xz
Input: usbtouchscreen - allow reporting calibrated data
This patch adds a module parameter to report either the raw coordinate data or the hardware-calibrated coordinate data for MicroTouch/3M touchscreens. The default is set to the raw coordinates for backwards compatibilty. Signed-off-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/touchscreen/usbtouchscreen.c')
-rw-r--r--drivers/input/touchscreen/usbtouchscreen.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 5080b26ba160..6d27a1d661e6 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -60,6 +60,10 @@ static int swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
+static int hwcalib_xy;
+module_param(hwcalib_xy, bool, 0644);
+MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
+
/* device specifc data/functions */
struct usbtouch_usb;
struct usbtouch_device_info {
@@ -260,8 +264,13 @@ static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
- dev->x = (pkt[8] << 8) | pkt[7];
- dev->y = (pkt[10] << 8) | pkt[9];
+ if (hwcalib_xy) {
+ dev->x = (pkt[4] << 8) | pkt[3];
+ dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
+ } else {
+ dev->x = (pkt[8] << 8) | pkt[7];
+ dev->y = (pkt[10] << 8) | pkt[9];
+ }
dev->touch = (pkt[2] & 0x40) ? 1 : 0;
return 1;
@@ -294,6 +303,12 @@ static int mtouch_init(struct usbtouch_usb *usbtouch)
return ret;
}
+ /* Default min/max xy are the raw values, override if using hw-calib */
+ if (hwcalib_xy) {
+ input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
+ input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
+ }
+
return 0;
}
#endif