Merge ../bleed-2.6
[linux-2.6] / 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 #include <linux/usb_input.h>
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         char name[128];
73         char phys[64];
74 };
75
76 static struct usb_device_id touchkit_devices[] = {
77         {USB_DEVICE(0x3823, 0x0001)},
78         {USB_DEVICE(0x0eef, 0x0001)},
79         {}
80 };
81
82 static void touchkit_irq(struct urb *urb, struct pt_regs *regs)
83 {
84         struct touchkit_usb *touchkit = urb->context;
85         int retval;
86         int x, y;
87
88         switch (urb->status) {
89         case 0:
90                 /* success */
91                 break;
92         case -ETIMEDOUT:
93                 /* this urb is timing out */
94                 dbg("%s - urb timed out - was the device unplugged?",
95                     __FUNCTION__);
96                 return;
97         case -ECONNRESET:
98         case -ENOENT:
99         case -ESHUTDOWN:
100                 /* this urb is terminated, clean up */
101                 dbg("%s - urb shutting down with status: %d",
102                     __FUNCTION__, urb->status);
103                 return;
104         default:
105                 dbg("%s - nonzero urb status received: %d",
106                     __FUNCTION__, urb->status);
107                 goto exit;
108         }
109
110         if (swap_xy) {
111                 y = TOUCHKIT_GET_X(touchkit->data);
112                 x = TOUCHKIT_GET_Y(touchkit->data);
113         } else {
114                 x = TOUCHKIT_GET_X(touchkit->data);
115                 y = TOUCHKIT_GET_Y(touchkit->data);
116         }
117
118         input_regs(touchkit->input, regs);
119         input_report_key(touchkit->input, BTN_TOUCH,
120                          TOUCHKIT_GET_TOUCHED(touchkit->data));
121         input_report_abs(touchkit->input, ABS_X, x);
122         input_report_abs(touchkit->input, ABS_Y, y);
123         input_sync(touchkit->input);
124
125 exit:
126         retval = usb_submit_urb(urb, GFP_ATOMIC);
127         if (retval)
128                 err("%s - usb_submit_urb failed with result: %d",
129                     __FUNCTION__, retval);
130 }
131
132 static int touchkit_open(struct input_dev *input)
133 {
134         struct touchkit_usb *touchkit = input->private;
135
136         touchkit->irq->dev = touchkit->udev;
137
138         if (usb_submit_urb(touchkit->irq, GFP_ATOMIC))
139                 return -EIO;
140
141         return 0;
142 }
143
144 static void touchkit_close(struct input_dev *input)
145 {
146         struct touchkit_usb *touchkit = input->private;
147
148         usb_kill_urb(touchkit->irq);
149 }
150
151 static int touchkit_alloc_buffers(struct usb_device *udev,
152                                   struct touchkit_usb *touchkit)
153 {
154         touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
155                                           SLAB_ATOMIC, &touchkit->data_dma);
156
157         if (!touchkit->data)
158                 return -1;
159
160         return 0;
161 }
162
163 static void touchkit_free_buffers(struct usb_device *udev,
164                                   struct touchkit_usb *touchkit)
165 {
166         if (touchkit->data)
167                 usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
168                                 touchkit->data, touchkit->data_dma);
169 }
170
171 static int touchkit_probe(struct usb_interface *intf,
172                           const struct usb_device_id *id)
173 {
174         struct touchkit_usb *touchkit;
175         struct input_dev *input_dev;
176         struct usb_host_interface *interface;
177         struct usb_endpoint_descriptor *endpoint;
178         struct usb_device *udev = interface_to_usbdev(intf);
179
180         interface = intf->cur_altsetting;
181         endpoint = &interface->endpoint[0].desc;
182
183         touchkit = kzalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
184         input_dev = input_allocate_device();
185         if (!touchkit || !input_dev)
186                 goto out_free;
187
188         if (touchkit_alloc_buffers(udev, touchkit))
189                 goto out_free;
190
191         touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
192         if (!touchkit->irq) {
193                 dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
194                 goto out_free_buffers;
195         }
196
197         touchkit->udev = udev;
198         touchkit->input = input_dev;
199
200         if (udev->manufacturer)
201                 strlcpy(touchkit->name, udev->manufacturer, sizeof(touchkit->name));
202
203         if (udev->product) {
204                 if (udev->manufacturer)
205                         strlcat(touchkit->name, " ", sizeof(touchkit->name));
206                 strlcat(touchkit->name, udev->product, sizeof(touchkit->name));
207         }
208
209         if (!strlen(touchkit->name))
210                 snprintf(touchkit->name, sizeof(touchkit->name),
211                         "USB Touchscreen %04x:%04x",
212                          le16_to_cpu(udev->descriptor.idVendor),
213                          le16_to_cpu(udev->descriptor.idProduct));
214
215         usb_make_path(udev, touchkit->phys, sizeof(touchkit->phys));
216         strlcpy(touchkit->phys, "/input0", sizeof(touchkit->phys));
217
218         input_dev->name = touchkit->name;
219         input_dev->phys = touchkit->phys;
220         usb_to_input_id(udev, &input_dev->id);
221         input_dev->cdev.dev = &intf->dev;
222         input_dev->private = touchkit;
223         input_dev->open = touchkit_open;
224         input_dev->close = touchkit_close;
225
226         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
227         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
228         input_set_abs_params(input_dev, ABS_X, TOUCHKIT_MIN_XC, TOUCHKIT_MAX_XC,
229                                 TOUCHKIT_XC_FUZZ, TOUCHKIT_XC_FLAT);
230         input_set_abs_params(input_dev, ABS_Y, TOUCHKIT_MIN_YC, TOUCHKIT_MAX_YC,
231                                 TOUCHKIT_YC_FUZZ, TOUCHKIT_YC_FLAT);
232
233         usb_fill_int_urb(touchkit->irq, touchkit->udev,
234                          usb_rcvintpipe(touchkit->udev, 0x81),
235                          touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
236                          touchkit_irq, touchkit, endpoint->bInterval);
237
238         input_register_device(touchkit->input);
239
240         usb_set_intfdata(intf, touchkit);
241         return 0;
242
243 out_free_buffers:
244         touchkit_free_buffers(udev, touchkit);
245 out_free:
246         input_free_device(input_dev);
247         kfree(touchkit);
248         return -ENOMEM;
249 }
250
251 static void touchkit_disconnect(struct usb_interface *intf)
252 {
253         struct touchkit_usb *touchkit = usb_get_intfdata(intf);
254
255         dbg("%s - called", __FUNCTION__);
256
257         if (!touchkit)
258                 return;
259
260         dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
261         usb_set_intfdata(intf, NULL);
262         usb_kill_urb(touchkit->irq);
263         input_unregister_device(touchkit->input);
264         usb_free_urb(touchkit->irq);
265         touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
266         kfree(touchkit);
267 }
268
269 MODULE_DEVICE_TABLE(usb, touchkit_devices);
270
271 static struct usb_driver touchkit_driver = {
272         .owner          = THIS_MODULE,
273         .name           = "touchkitusb",
274         .probe          = touchkit_probe,
275         .disconnect     = touchkit_disconnect,
276         .id_table       = touchkit_devices,
277 };
278
279 static int __init touchkit_init(void)
280 {
281         return usb_register(&touchkit_driver);
282 }
283
284 static void __exit touchkit_cleanup(void)
285 {
286         usb_deregister(&touchkit_driver);
287 }
288
289 module_init(touchkit_init);
290 module_exit(touchkit_cleanup);
291
292 MODULE_AUTHOR(DRIVER_AUTHOR);
293 MODULE_DESCRIPTION(DRIVER_DESC);
294 MODULE_LICENSE("GPL");