1 /******************************************************************************
2 * mtouchusb.c -- Driver for Microtouch (Now 3M) USB Touchscreens
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 * Based upon original work by Radoslaw Garbacz (usb-support@ite.pl)
19 * (http://freshmeat.net/projects/3mtouchscreendriver)
23 * 0.3 & 0.4 2002 (TEJ) tejohnson@yahoo.com
24 * Updated to 2.4.18, then 2.4.19
25 * Old version still relied on stealing a minor
27 * 0.5 02/26/2004 (TEJ) tejohnson@yahoo.com
28 * Complete rewrite using Linux Input in 2.6.3
29 * Unfortunately no calibration support at this time
31 * 1.4 04/25/2004 (TEJ) tejohnson@yahoo.com
32 * Changed reset from standard USB dev reset to vendor reset
33 * Changed data sent to host from compensated to raw coordinates
34 * Eliminated vendor/product module params
35 * Performed multiple successful tests with an EXII-5010UC
37 * 1.5 02/27/2005 ddstreet@ieee.org
38 * Added module parameter to select raw or hw-calibrated coordinate reporting
40 *****************************************************************************/
42 #include <linux/config.h>
43 #include <linux/kernel.h>
44 #include <linux/slab.h>
45 #include <linux/input.h>
46 #include <linux/module.h>
47 #include <linux/init.h>
48 #include <linux/usb.h>
49 #include <linux/usb_input.h>
51 #define MTOUCHUSB_MIN_XC 0x0
52 #define MTOUCHUSB_MAX_RAW_XC 0x4000
53 #define MTOUCHUSB_MAX_CALIB_XC 0xffff
54 #define MTOUCHUSB_XC_FUZZ 0x0
55 #define MTOUCHUSB_XC_FLAT 0x0
56 #define MTOUCHUSB_MIN_YC 0x0
57 #define MTOUCHUSB_MAX_RAW_YC 0x4000
58 #define MTOUCHUSB_MAX_CALIB_YC 0xffff
59 #define MTOUCHUSB_YC_FUZZ 0x0
60 #define MTOUCHUSB_YC_FLAT 0x0
62 #define MTOUCHUSB_ASYNC_REPORT 1
63 #define MTOUCHUSB_RESET 7
64 #define MTOUCHUSB_REPORT_DATA_SIZE 11
65 #define MTOUCHUSB_REQ_CTRLLR_ID 10
67 #define MTOUCHUSB_GET_RAW_XC(data) (data[8]<<8 | data[7])
68 #define MTOUCHUSB_GET_CALIB_XC(data) (data[4]<<8 | data[3])
69 #define MTOUCHUSB_GET_RAW_YC(data) (data[10]<<8 | data[9])
70 #define MTOUCHUSB_GET_CALIB_YC(data) (data[6]<<8 | data[5])
71 #define MTOUCHUSB_GET_XC(data) (raw_coordinates ? \
72 MTOUCHUSB_GET_RAW_XC(data) : \
73 MTOUCHUSB_GET_CALIB_XC(data))
74 #define MTOUCHUSB_GET_YC(data) (raw_coordinates ? \
75 MTOUCHUSB_GET_RAW_YC(data) : \
76 MTOUCHUSB_GET_CALIB_YC(data))
77 #define MTOUCHUSB_GET_TOUCHED(data) ((data[2] & 0x40) ? 1:0)
79 #define DRIVER_VERSION "v1.5"
80 #define DRIVER_AUTHOR "Todd E. Johnson, tejohnson@yahoo.com"
81 #define DRIVER_DESC "3M USB Touchscreen Driver"
82 #define DRIVER_LICENSE "GPL"
84 static int raw_coordinates = 1;
86 module_param(raw_coordinates, bool, S_IRUGO | S_IWUSR);
87 MODULE_PARM_DESC(raw_coordinates, "report raw coordinate values (y, default) or hardware-calibrated coordinate values (n)");
93 struct usb_device *udev;
94 struct input_dev *input;
99 static struct usb_device_id mtouchusb_devices[] = {
100 { USB_DEVICE(0x0596, 0x0001) },
104 static void mtouchusb_irq(struct urb *urb, struct pt_regs *regs)
106 struct mtouch_usb *mtouch = urb->context;
109 switch (urb->status) {
114 /* this urb is timing out */
115 dbg("%s - urb timed out - was the device unplugged?",
121 /* this urb is terminated, clean up */
122 dbg("%s - urb shutting down with status: %d",
123 __FUNCTION__, urb->status);
126 dbg("%s - nonzero urb status received: %d",
127 __FUNCTION__, urb->status);
131 input_regs(mtouch->input, regs);
132 input_report_key(mtouch->input, BTN_TOUCH,
133 MTOUCHUSB_GET_TOUCHED(mtouch->data));
134 input_report_abs(mtouch->input, ABS_X, MTOUCHUSB_GET_XC(mtouch->data));
135 input_report_abs(mtouch->input, ABS_Y,
136 (raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC)
137 - MTOUCHUSB_GET_YC(mtouch->data));
138 input_sync(mtouch->input);
141 retval = usb_submit_urb(urb, GFP_ATOMIC);
143 err("%s - usb_submit_urb failed with result: %d",
144 __FUNCTION__, retval);
147 static int mtouchusb_open(struct input_dev *input)
149 struct mtouch_usb *mtouch = input->private;
151 mtouch->irq->dev = mtouch->udev;
153 if (usb_submit_urb(mtouch->irq, GFP_ATOMIC))
159 static void mtouchusb_close(struct input_dev *input)
161 struct mtouch_usb *mtouch = input->private;
163 usb_kill_urb(mtouch->irq);
166 static int mtouchusb_alloc_buffers(struct usb_device *udev, struct mtouch_usb *mtouch)
168 dbg("%s - called", __FUNCTION__);
170 mtouch->data = usb_buffer_alloc(udev, MTOUCHUSB_REPORT_DATA_SIZE,
171 SLAB_ATOMIC, &mtouch->data_dma);
179 static void mtouchusb_free_buffers(struct usb_device *udev, struct mtouch_usb *mtouch)
181 dbg("%s - called", __FUNCTION__);
184 usb_buffer_free(udev, MTOUCHUSB_REPORT_DATA_SIZE,
185 mtouch->data, mtouch->data_dma);
188 static int mtouchusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
190 struct mtouch_usb *mtouch;
191 struct input_dev *input_dev;
192 struct usb_host_interface *interface;
193 struct usb_endpoint_descriptor *endpoint;
194 struct usb_device *udev = interface_to_usbdev(intf);
197 dbg("%s - called", __FUNCTION__);
199 dbg("%s - setting interface", __FUNCTION__);
200 interface = intf->cur_altsetting;
202 dbg("%s - setting endpoint", __FUNCTION__);
203 endpoint = &interface->endpoint[0].desc;
205 mtouch = kzalloc(sizeof(struct mtouch_usb), GFP_KERNEL);
206 input_dev = input_allocate_device();
207 if (!mtouch || !input_dev) {
208 err("%s - Out of memory.", __FUNCTION__);
212 dbg("%s - allocating buffers", __FUNCTION__);
213 if (mtouchusb_alloc_buffers(udev, mtouch))
217 mtouch->input = input_dev;
219 if (udev->manufacturer)
220 strlcpy(mtouch->name, udev->manufacturer, sizeof(mtouch->name));
223 if (udev->manufacturer)
224 strlcat(mtouch->name, " ", sizeof(mtouch->name));
225 strlcat(mtouch->name, udev->product, sizeof(mtouch->name));
228 if (!strlen(mtouch->name))
229 snprintf(mtouch->name, sizeof(mtouch->name),
230 "USB Touchscreen %04x:%04x",
231 le16_to_cpu(udev->descriptor.idVendor),
232 le16_to_cpu(udev->descriptor.idProduct));
234 usb_make_path(udev, mtouch->phys, sizeof(mtouch->phys));
235 strlcpy(mtouch->phys, "/input0", sizeof(mtouch->phys));
237 input_dev->name = mtouch->name;
238 input_dev->phys = mtouch->phys;
239 usb_to_input_id(udev, &input_dev->id);
240 input_dev->cdev.dev = &intf->dev;
241 input_dev->private = mtouch;
243 input_dev->open = mtouchusb_open;
244 input_dev->close = mtouchusb_close;
246 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
247 input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
248 input_set_abs_params(input_dev, ABS_X, MTOUCHUSB_MIN_XC,
249 raw_coordinates ? MTOUCHUSB_MAX_RAW_XC : MTOUCHUSB_MAX_CALIB_XC,
250 MTOUCHUSB_XC_FUZZ, MTOUCHUSB_XC_FLAT);
251 input_set_abs_params(input_dev, ABS_Y, MTOUCHUSB_MIN_YC,
252 raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC,
253 MTOUCHUSB_YC_FUZZ, MTOUCHUSB_YC_FLAT);
255 nRet = usb_control_msg(mtouch->udev, usb_rcvctrlpipe(udev, 0),
257 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
258 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
259 dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
262 dbg("%s - usb_alloc_urb: mtouch->irq", __FUNCTION__);
263 mtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
265 dbg("%s - usb_alloc_urb failed: mtouch->irq", __FUNCTION__);
269 dbg("%s - usb_fill_int_urb", __FUNCTION__);
270 usb_fill_int_urb(mtouch->irq, mtouch->udev,
271 usb_rcvintpipe(mtouch->udev, 0x81),
272 mtouch->data, MTOUCHUSB_REPORT_DATA_SIZE,
273 mtouchusb_irq, mtouch, endpoint->bInterval);
275 dbg("%s - input_register_device", __FUNCTION__);
276 input_register_device(mtouch->input);
278 nRet = usb_control_msg(mtouch->udev, usb_rcvctrlpipe(udev, 0),
279 MTOUCHUSB_ASYNC_REPORT,
280 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
281 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
282 dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
285 usb_set_intfdata(intf, mtouch);
288 fail2: mtouchusb_free_buffers(udev, mtouch);
289 fail1: input_free_device(input_dev);
294 static void mtouchusb_disconnect(struct usb_interface *intf)
296 struct mtouch_usb *mtouch = usb_get_intfdata(intf);
298 dbg("%s - called", __FUNCTION__);
299 usb_set_intfdata(intf, NULL);
301 dbg("%s - mtouch is initialized, cleaning up", __FUNCTION__);
302 usb_kill_urb(mtouch->irq);
303 input_unregister_device(mtouch->input);
304 usb_free_urb(mtouch->irq);
305 mtouchusb_free_buffers(interface_to_usbdev(intf), mtouch);
310 MODULE_DEVICE_TABLE(usb, mtouchusb_devices);
312 static struct usb_driver mtouchusb_driver = {
314 .probe = mtouchusb_probe,
315 .disconnect = mtouchusb_disconnect,
316 .id_table = mtouchusb_devices,
319 static int __init mtouchusb_init(void)
321 dbg("%s - called", __FUNCTION__);
322 return usb_register(&mtouchusb_driver);
325 static void __exit mtouchusb_cleanup(void)
327 dbg("%s - called", __FUNCTION__);
328 usb_deregister(&mtouchusb_driver);
331 module_init(mtouchusb_init);
332 module_exit(mtouchusb_cleanup);
334 MODULE_AUTHOR(DRIVER_AUTHOR);
335 MODULE_DESCRIPTION(DRIVER_DESC);
336 MODULE_LICENSE("GPL");