vserver 1.9.5.x5
[linux-2.6.git] / drivers / usb / input / touchkitusb.c
1 /******************************************************************************
2  * touchkitusb.c  --  Driver for eGalax TouchKit USB Touchscreens
3  *
4  * Copyright (C) 2004 by Daniel Ritz
5  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License as
9  * published by the Free Software Foundation; either version 2 of the
10  * License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  *
21  * Based upon mtouchusb.c
22  *
23  *****************************************************************************/
24
25 //#define DEBUG
26
27 #include <linux/config.h>
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
30 #include <linux/input.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33
34 #if !defined(DEBUG) && defined(CONFIG_USB_DEBUG)
35 #define DEBUG
36 #endif
37 #include <linux/usb.h>
38
39
40 #define TOUCHKIT_MIN_XC                 0x0
41 #define TOUCHKIT_MAX_XC                 0x07ff
42 #define TOUCHKIT_XC_FUZZ                0x0
43 #define TOUCHKIT_XC_FLAT                0x0
44 #define TOUCHKIT_MIN_YC                 0x0
45 #define TOUCHKIT_MAX_YC                 0x07ff
46 #define TOUCHKIT_YC_FUZZ                0x0
47 #define TOUCHKIT_YC_FLAT                0x0
48 #define TOUCHKIT_REPORT_DATA_SIZE       8
49
50 #define TOUCHKIT_DOWN                   0x01
51 #define TOUCHKIT_POINT_TOUCH            0x81
52 #define TOUCHKIT_POINT_NOTOUCH          0x80
53
54 #define TOUCHKIT_GET_TOUCHED(dat)       ((((dat)[0]) & TOUCHKIT_DOWN) ? 1 : 0)
55 #define TOUCHKIT_GET_X(dat)             (((dat)[3] << 7) | (dat)[4])
56 #define TOUCHKIT_GET_Y(dat)             (((dat)[1] << 7) | (dat)[2])
57
58 #define DRIVER_VERSION                  "v0.1"
59 #define DRIVER_AUTHOR                   "Daniel Ritz <daniel.ritz@gmx.ch>"
60 #define DRIVER_DESC                     "eGalax TouchKit USB HID Touchscreen Driver"
61
62 static int swap_xy;
63 module_param(swap_xy, bool, 0644);
64 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
65
66 struct touchkit_usb {
67         unsigned char *data;
68         dma_addr_t data_dma;
69         struct urb *irq;
70         struct usb_device *udev;
71         struct input_dev input;
72         int open;
73         char name[128];
74         char phys[64];
75 };
76
77 static struct usb_device_id touchkit_devices[] = {
78         {USB_DEVICE(0x3823, 0x0001)},
79         {USB_DEVICE(0x0eef, 0x0001)},
80         {}
81 };
82
83 static void touchkit_irq(struct urb *urb, struct pt_regs *regs)
84 {
85         struct touchkit_usb *touchkit = urb->context;
86         int retval;
87         int x, y;
88
89         switch (urb->status) {
90         case 0:
91                 /* success */
92                 break;
93         case -ETIMEDOUT:
94                 /* this urb is timing out */
95                 dbg("%s - urb timed out - was the device unplugged?",
96                     __FUNCTION__);
97                 return;
98         case -ECONNRESET:
99         case -ENOENT:
100         case -ESHUTDOWN:
101                 /* this urb is terminated, clean up */
102                 dbg("%s - urb shutting down with status: %d",
103                     __FUNCTION__, urb->status);
104                 return;
105         default:
106                 dbg("%s - nonzero urb status received: %d",
107                     __FUNCTION__, urb->status);
108                 goto exit;
109         }
110
111         if (swap_xy) {
112                 y = TOUCHKIT_GET_X(touchkit->data);
113                 x = TOUCHKIT_GET_Y(touchkit->data);
114         } else {
115                 x = TOUCHKIT_GET_X(touchkit->data);
116                 y = TOUCHKIT_GET_Y(touchkit->data);
117         }
118
119         input_regs(&touchkit->input, regs);
120         input_report_key(&touchkit->input, BTN_TOUCH,
121                          TOUCHKIT_GET_TOUCHED(touchkit->data));
122         input_report_abs(&touchkit->input, ABS_X, x);
123         input_report_abs(&touchkit->input, ABS_Y, y);
124         input_sync(&touchkit->input);
125
126 exit:
127         retval = usb_submit_urb(urb, GFP_ATOMIC);
128         if (retval)
129                 err("%s - usb_submit_urb failed with result: %d",
130                     __FUNCTION__, retval);
131 }
132
133 static int touchkit_open(struct input_dev *input)
134 {
135         struct touchkit_usb *touchkit = input->private;
136
137         if (touchkit->open++)
138                 return 0;
139
140         touchkit->irq->dev = touchkit->udev;
141
142         if (usb_submit_urb(touchkit->irq, GFP_ATOMIC)) {
143                 touchkit->open--;
144                 return -EIO;
145         }
146
147         return 0;
148 }
149
150 static void touchkit_close(struct input_dev *input)
151 {
152         struct touchkit_usb *touchkit = input->private;
153
154         if (!--touchkit->open)
155                 usb_kill_urb(touchkit->irq);
156 }
157
158 static int touchkit_alloc_buffers(struct usb_device *udev,
159                                   struct touchkit_usb *touchkit)
160 {
161         touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
162                                           SLAB_ATOMIC, &touchkit->data_dma);
163
164         if (!touchkit->data)
165                 return -1;
166
167         return 0;
168 }
169
170 static void touchkit_free_buffers(struct usb_device *udev,
171                                   struct touchkit_usb *touchkit)
172 {
173         if (touchkit->data)
174                 usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
175                                 touchkit->data, touchkit->data_dma);
176 }
177
178 static int touchkit_probe(struct usb_interface *intf,
179                           const struct usb_device_id *id)
180 {
181         int ret;
182         struct touchkit_usb *touchkit;
183         struct usb_host_interface *interface;
184         struct usb_endpoint_descriptor *endpoint;
185         struct usb_device *udev = interface_to_usbdev(intf);
186         char path[64];
187         char *buf;
188
189         interface = intf->cur_altsetting;
190         endpoint = &interface->endpoint[0].desc;
191
192         touchkit = kmalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
193         if (!touchkit)
194                 return -ENOMEM;
195
196         memset(touchkit, 0, sizeof(struct touchkit_usb));
197         touchkit->udev = udev;
198
199         if (touchkit_alloc_buffers(udev, touchkit)) {
200                 ret = -ENOMEM;
201                 goto out_free;
202         }
203
204         touchkit->input.private = touchkit;
205         touchkit->input.open = touchkit_open;
206         touchkit->input.close = touchkit_close;
207
208         usb_make_path(udev, path, 64);
209         sprintf(touchkit->phys, "%s/input0", path);
210
211         touchkit->input.name = touchkit->name;
212         touchkit->input.phys = touchkit->phys;
213         touchkit->input.id.bustype = BUS_USB;
214         touchkit->input.id.vendor = le16_to_cpu(udev->descriptor.idVendor);
215         touchkit->input.id.product = le16_to_cpu(udev->descriptor.idProduct);
216         touchkit->input.id.version = le16_to_cpu(udev->descriptor.bcdDevice);
217         touchkit->input.dev = &intf->dev;
218
219         touchkit->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
220         touchkit->input.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
221         touchkit->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
222
223         /* Used to Scale Compensated Data */
224         touchkit->input.absmin[ABS_X] = TOUCHKIT_MIN_XC;
225         touchkit->input.absmax[ABS_X] = TOUCHKIT_MAX_XC;
226         touchkit->input.absfuzz[ABS_X] = TOUCHKIT_XC_FUZZ;
227         touchkit->input.absflat[ABS_X] = TOUCHKIT_XC_FLAT;
228         touchkit->input.absmin[ABS_Y] = TOUCHKIT_MIN_YC;
229         touchkit->input.absmax[ABS_Y] = TOUCHKIT_MAX_YC;
230         touchkit->input.absfuzz[ABS_Y] = TOUCHKIT_YC_FUZZ;
231         touchkit->input.absflat[ABS_Y] = TOUCHKIT_YC_FLAT;
232
233         buf = kmalloc(63, GFP_KERNEL);
234         if (!buf) {
235                 ret = -ENOMEM;
236                 goto out_free_buffers;
237         }
238
239         if (udev->descriptor.iManufacturer &&
240             usb_string(udev, udev->descriptor.iManufacturer, buf, 63) > 0)
241                 strcat(touchkit->name, buf);
242         if (udev->descriptor.iProduct &&
243             usb_string(udev, udev->descriptor.iProduct, buf, 63) > 0)
244                 sprintf(touchkit->name, "%s %s", touchkit->name, buf);
245
246         if (!strlen(touchkit->name))
247                 sprintf(touchkit->name, "USB Touchscreen %04x:%04x",
248                         touchkit->input.id.vendor, touchkit->input.id.product);
249
250         kfree(buf);
251
252         touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
253         if (!touchkit->irq) {
254                 dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
255                 ret = -ENOMEM;
256                 goto out_free_buffers;
257         }
258
259         usb_fill_int_urb(touchkit->irq, touchkit->udev,
260                          usb_rcvintpipe(touchkit->udev, 0x81),
261                          touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
262                          touchkit_irq, touchkit, endpoint->bInterval);
263
264         input_register_device(&touchkit->input);
265
266         printk(KERN_INFO "input: %s on %s\n", touchkit->name, path);
267         usb_set_intfdata(intf, touchkit);
268
269         return 0;
270
271 out_free_buffers:
272         touchkit_free_buffers(udev, touchkit);
273 out_free:
274         kfree(touchkit);
275         return ret;
276 }
277
278 static void touchkit_disconnect(struct usb_interface *intf)
279 {
280         struct touchkit_usb *touchkit = usb_get_intfdata(intf);
281
282         dbg("%s - called", __FUNCTION__);
283
284         if (!touchkit)
285                 return;
286
287         dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
288         usb_set_intfdata(intf, NULL);
289         input_unregister_device(&touchkit->input);
290         usb_kill_urb(touchkit->irq);
291         usb_free_urb(touchkit->irq);
292         touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
293         kfree(touchkit);
294 }
295
296 MODULE_DEVICE_TABLE(usb, touchkit_devices);
297
298 static struct usb_driver touchkit_driver = {
299         .owner          = THIS_MODULE,
300         .name           = "touchkitusb",
301         .probe          = touchkit_probe,
302         .disconnect     = touchkit_disconnect,
303         .id_table       = touchkit_devices,
304 };
305
306 static int __init touchkit_init(void)
307 {
308         return usb_register(&touchkit_driver);
309 }
310
311 static void __exit touchkit_cleanup(void)
312 {
313         usb_deregister(&touchkit_driver);
314 }
315
316 module_init(touchkit_init);
317 module_exit(touchkit_cleanup);
318
319 MODULE_AUTHOR(DRIVER_AUTHOR);
320 MODULE_DESCRIPTION(DRIVER_DESC);
321 MODULE_LICENSE("GPL");