Input: drivers/usb/input - don't access dev->private directly
[linux-2.6.git] / drivers / usb / input / wacom_sys.c
1 /*
2  * drivers/usb/input/wacom_sys.c
3  *
4  *  USB Wacom Graphire and Wacom Intuos tablet support - system specific code
5  */
6
7 /*
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  */
13
14 #include "wacom.h"
15 #include "wacom_wac.h"
16
17 #define USB_REQ_GET_REPORT      0x01
18 #define USB_REQ_SET_REPORT      0x09
19
20 static int usb_get_report(struct usb_interface *intf, unsigned char type,
21                                 unsigned char id, void *buf, int size)
22 {
23         return usb_control_msg(interface_to_usbdev(intf),
24                 usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
25                 USB_REQ_GET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
26                 (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
27                 buf, size, 100);
28 }
29
30 static int usb_set_report(struct usb_interface *intf, unsigned char type,
31                                 unsigned char id, void *buf, int size)
32 {
33         return usb_control_msg(interface_to_usbdev(intf),
34                 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
35                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
36                 (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
37                 buf, size, 1000);
38 }
39
40 static struct input_dev * get_input_dev(struct wacom_combo *wcombo)
41 {
42         return wcombo->wacom->dev;
43 }
44
45 static void wacom_sys_irq(struct urb *urb)
46 {
47         struct wacom *wacom = urb->context;
48         struct wacom_combo wcombo;
49         int retval;
50
51         switch (urb->status) {
52         case 0:
53                 /* success */
54                 break;
55         case -ECONNRESET:
56         case -ENOENT:
57         case -ESHUTDOWN:
58                 /* this urb is terminated, clean up */
59                 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
60                 return;
61         default:
62                 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
63                 goto exit;
64         }
65
66         wcombo.wacom = wacom;
67         wcombo.urb = urb;
68
69         if (wacom_wac_irq(wacom->wacom_wac, (void *)&wcombo))
70                 input_sync(get_input_dev(&wcombo));
71
72  exit:
73         retval = usb_submit_urb (urb, GFP_ATOMIC);
74         if (retval)
75                 err ("%s - usb_submit_urb failed with result %d",
76                      __FUNCTION__, retval);
77 }
78
79 void wacom_report_key(void *wcombo, unsigned int key_type, int key_data)
80 {
81         input_report_key(get_input_dev((struct wacom_combo *)wcombo), key_type, key_data);
82         return;
83 }
84
85 void wacom_report_abs(void *wcombo, unsigned int abs_type, int abs_data)
86 {
87         input_report_abs(get_input_dev((struct wacom_combo *)wcombo), abs_type, abs_data);
88         return;
89 }
90
91 void wacom_report_rel(void *wcombo, unsigned int rel_type, int rel_data)
92 {
93         input_report_rel(get_input_dev((struct wacom_combo *)wcombo), rel_type, rel_data);
94         return;
95 }
96
97 void wacom_input_event(void *wcombo, unsigned int type, unsigned int code, int value)
98 {
99         input_event(get_input_dev((struct wacom_combo *)wcombo), type, code, value);
100         return;
101 }
102
103 __u16 wacom_be16_to_cpu(unsigned char *data)
104 {
105         __u16 value;
106         value = be16_to_cpu(*(__be16 *) data);
107         return value;
108 }
109
110 __u16 wacom_le16_to_cpu(unsigned char *data)
111 {
112         __u16 value;
113         value = le16_to_cpu(*(__le16 *) data);
114         return value;
115 }
116
117 void wacom_input_sync(void *wcombo)
118 {
119         input_sync(get_input_dev((struct wacom_combo *)wcombo));
120         return;
121 }
122
123 static int wacom_open(struct input_dev *dev)
124 {
125         struct wacom *wacom = input_get_drvdata(dev);
126
127         wacom->irq->dev = wacom->usbdev;
128         if (usb_submit_urb(wacom->irq, GFP_KERNEL))
129                 return -EIO;
130
131         return 0;
132 }
133
134 static void wacom_close(struct input_dev *dev)
135 {
136         struct wacom *wacom = input_get_drvdata(dev);
137
138         usb_kill_urb(wacom->irq);
139 }
140
141 void input_dev_g4(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
142 {
143         input_dev->evbit[0] |= BIT(EV_MSC);
144         input_dev->mscbit[0] |= BIT(MSC_SERIAL);
145         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_FINGER);
146         input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_0) | BIT(BTN_4);
147 }
148
149 void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
150 {
151         input_dev->evbit[0] |= BIT(EV_REL);
152         input_dev->relbit[0] |= BIT(REL_WHEEL);
153         input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
154         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER) | BIT(BTN_TOOL_MOUSE) | BIT(BTN_STYLUS2);
155         input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
156 }
157
158 void input_dev_i3s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
159 {
160         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_FINGER);
161         input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_0) | BIT(BTN_1) | BIT(BTN_2) | BIT(BTN_3);
162         input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
163 }
164
165 void input_dev_i3(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
166 {
167         input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_4) | BIT(BTN_5) | BIT(BTN_6) | BIT(BTN_7);
168         input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
169 }
170
171 void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
172 {
173         input_dev->evbit[0] |= BIT(EV_MSC) | BIT(EV_REL);
174         input_dev->mscbit[0] |= BIT(MSC_SERIAL);
175         input_dev->relbit[0] |= BIT(REL_WHEEL);
176         input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE) | BIT(BTN_SIDE) | BIT(BTN_EXTRA);
177         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER) | BIT(BTN_TOOL_MOUSE) | BIT(BTN_TOOL_BRUSH)
178                 | BIT(BTN_TOOL_PENCIL) | BIT(BTN_TOOL_AIRBRUSH) | BIT(BTN_TOOL_LENS) | BIT(BTN_STYLUS2);
179         input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
180         input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0);
181         input_set_abs_params(input_dev, ABS_TILT_X, 0, 127, 0, 0);
182         input_set_abs_params(input_dev, ABS_TILT_Y, 0, 127, 0, 0);
183         input_set_abs_params(input_dev, ABS_RZ, -900, 899, 0, 0);
184         input_set_abs_params(input_dev, ABS_THROTTLE, -1023, 1023, 0, 0);
185 }
186
187 void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
188 {
189         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_STYLUS2) | BIT(BTN_TOOL_RUBBER);
190 }
191
192 void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
193 {
194         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER);
195 }
196
197 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
198 {
199         struct usb_device *dev = interface_to_usbdev(intf);
200         struct usb_endpoint_descriptor *endpoint;
201         struct wacom *wacom;
202         struct wacom_wac *wacom_wac;
203         struct input_dev *input_dev;
204         int error = -ENOMEM;
205         char rep_data[2], limit = 0;
206
207         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
208         wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
209         input_dev = input_allocate_device();
210         if (!wacom || !input_dev || !wacom_wac)
211                 goto fail1;
212
213         wacom_wac->data = usb_buffer_alloc(dev, 10, GFP_KERNEL, &wacom->data_dma);
214         if (!wacom_wac->data)
215                 goto fail1;
216
217         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
218         if (!wacom->irq)
219                 goto fail2;
220
221         wacom->usbdev = dev;
222         wacom->dev = input_dev;
223         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
224         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
225
226         wacom_wac->features = get_wacom_feature(id);
227         BUG_ON(wacom_wac->features->pktlen > 10);
228
229         input_dev->name = wacom_wac->features->name;
230         wacom->wacom_wac = wacom_wac;
231         usb_to_input_id(dev, &input_dev->id);
232
233         input_dev->cdev.dev = &intf->dev;
234
235         input_set_drvdata(input_dev, wacom);
236
237         input_dev->open = wacom_open;
238         input_dev->close = wacom_close;
239
240         input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS);
241         input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH) | BIT(BTN_STYLUS);
242         input_set_abs_params(input_dev, ABS_X, 0, wacom_wac->features->x_max, 4, 0);
243         input_set_abs_params(input_dev, ABS_Y, 0, wacom_wac->features->y_max, 4, 0);
244         input_set_abs_params(input_dev, ABS_PRESSURE, 0, wacom_wac->features->pressure_max, 0, 0);
245         input_dev->absbit[LONG(ABS_MISC)] |= BIT(ABS_MISC);
246
247         wacom_init_input_dev(input_dev, wacom_wac);
248
249         endpoint = &intf->cur_altsetting->endpoint[0].desc;
250
251         usb_fill_int_urb(wacom->irq, dev,
252                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
253                          wacom_wac->data, wacom_wac->features->pktlen,
254                          wacom_sys_irq, wacom, endpoint->bInterval);
255         wacom->irq->transfer_dma = wacom->data_dma;
256         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
257
258         error = input_register_device(wacom->dev);
259         if (error)
260                 goto fail3;
261
262         /* Ask the tablet to report tablet data. Repeat until it succeeds */
263         do {
264                 rep_data[0] = 2;
265                 rep_data[1] = 2;
266                 usb_set_report(intf, 3, 2, rep_data, 2);
267                 usb_get_report(intf, 3, 2, rep_data, 2);
268         } while (rep_data[1] != 2 && limit++ < 5);
269
270         usb_set_intfdata(intf, wacom);
271         return 0;
272
273  fail3: usb_free_urb(wacom->irq);
274  fail2: usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
275  fail1: input_free_device(input_dev);
276         kfree(wacom);
277         kfree(wacom_wac);
278         return error;
279 }
280
281 static void wacom_disconnect(struct usb_interface *intf)
282 {
283         struct wacom *wacom = usb_get_intfdata (intf);
284
285         usb_set_intfdata(intf, NULL);
286         if (wacom) {
287                 usb_kill_urb(wacom->irq);
288                 input_unregister_device(wacom->dev);
289                 usb_free_urb(wacom->irq);
290                 usb_buffer_free(interface_to_usbdev(intf), 10, wacom->wacom_wac->data, wacom->data_dma);
291                 kfree(wacom->wacom_wac);
292                 kfree(wacom);
293         }
294 }
295
296 static struct usb_driver wacom_driver = {
297         .name =         "wacom",
298         .probe =        wacom_probe,
299         .disconnect =   wacom_disconnect,
300 };
301
302 static int __init wacom_init(void)
303 {
304         int result;
305         wacom_driver.id_table = get_device_table();
306         result = usb_register(&wacom_driver);
307         if (result == 0)
308                 info(DRIVER_VERSION ":" DRIVER_DESC);
309         return result;
310 }
311
312 static void __exit wacom_exit(void)
313 {
314         usb_deregister(&wacom_driver);
315 }
316
317 module_init(wacom_init);
318 module_exit(wacom_exit);