These changes are the raw update to qemu-2.6.
[kvmfornfv.git] / qemu / hw / usb / dev-wacom.c
1 /*
2  * Wacom PenPartner USB tablet emulation.
3  *
4  * Copyright (c) 2006 Openedhand Ltd.
5  * Author: Andrzej Zaborowski <balrog@zabor.org>
6  *
7  * Based on hw/usb-hid.c:
8  * Copyright (c) 2005 Fabrice Bellard
9  *
10  * Permission is hereby granted, free of charge, to any person obtaining a copy
11  * of this software and associated documentation files (the "Software"), to deal
12  * in the Software without restriction, including without limitation the rights
13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14  * copies of the Software, and to permit persons to whom the Software is
15  * furnished to do so, subject to the following conditions:
16  *
17  * The above copyright notice and this permission notice shall be included in
18  * all copies or substantial portions of the Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26  * THE SOFTWARE.
27  */
28 #include "qemu/osdep.h"
29 #include "hw/hw.h"
30 #include "ui/console.h"
31 #include "hw/usb.h"
32 #include "hw/usb/desc.h"
33
34 /* Interface requests */
35 #define WACOM_GET_REPORT        0x2101
36 #define WACOM_SET_REPORT        0x2109
37
38 /* HID interface requests */
39 #define HID_GET_REPORT          0xa101
40 #define HID_GET_IDLE            0xa102
41 #define HID_GET_PROTOCOL        0xa103
42 #define HID_SET_IDLE            0x210a
43 #define HID_SET_PROTOCOL        0x210b
44
45 typedef struct USBWacomState {
46     USBDevice dev;
47     USBEndpoint *intr;
48     QEMUPutMouseEntry *eh_entry;
49     int dx, dy, dz, buttons_state;
50     int x, y;
51     int mouse_grabbed;
52     enum {
53         WACOM_MODE_HID = 1,
54         WACOM_MODE_WACOM = 2,
55     } mode;
56     uint8_t idle;
57     int changed;
58 } USBWacomState;
59
60 #define TYPE_USB_WACOM "usb-wacom-tablet"
61 #define USB_WACOM(obj) OBJECT_CHECK(USBWacomState, (obj), TYPE_USB_WACOM)
62
63 enum {
64     STR_MANUFACTURER = 1,
65     STR_PRODUCT,
66     STR_SERIALNUMBER,
67 };
68
69 static const USBDescStrings desc_strings = {
70     [STR_MANUFACTURER]     = "QEMU",
71     [STR_PRODUCT]          = "Wacom PenPartner",
72     [STR_SERIALNUMBER]     = "1",
73 };
74
75 static const USBDescIface desc_iface_wacom = {
76     .bInterfaceNumber              = 0,
77     .bNumEndpoints                 = 1,
78     .bInterfaceClass               = USB_CLASS_HID,
79     .bInterfaceSubClass            = 0x01, /* boot */
80     .bInterfaceProtocol            = 0x02,
81     .ndesc                         = 1,
82     .descs = (USBDescOther[]) {
83         {
84             /* HID descriptor */
85             .data = (uint8_t[]) {
86                 0x09,          /*  u8  bLength */
87                 0x21,          /*  u8  bDescriptorType */
88                 0x01, 0x10,    /*  u16 HID_class */
89                 0x00,          /*  u8  country_code */
90                 0x01,          /*  u8  num_descriptors */
91                 0x22,          /*  u8  type: Report */
92                 0x6e, 0,       /*  u16 len */
93             },
94         },
95     },
96     .eps = (USBDescEndpoint[]) {
97         {
98             .bEndpointAddress      = USB_DIR_IN | 0x01,
99             .bmAttributes          = USB_ENDPOINT_XFER_INT,
100             .wMaxPacketSize        = 8,
101             .bInterval             = 0x0a,
102         },
103     },
104 };
105
106 static const USBDescDevice desc_device_wacom = {
107     .bcdUSB                        = 0x0110,
108     .bMaxPacketSize0               = 8,
109     .bNumConfigurations            = 1,
110     .confs = (USBDescConfig[]) {
111         {
112             .bNumInterfaces        = 1,
113             .bConfigurationValue   = 1,
114             .bmAttributes          = USB_CFG_ATT_ONE,
115             .bMaxPower             = 40,
116             .nif = 1,
117             .ifs = &desc_iface_wacom,
118         },
119     },
120 };
121
122 static const USBDesc desc_wacom = {
123     .id = {
124         .idVendor          = 0x056a,
125         .idProduct         = 0x0000,
126         .bcdDevice         = 0x4210,
127         .iManufacturer     = STR_MANUFACTURER,
128         .iProduct          = STR_PRODUCT,
129         .iSerialNumber     = STR_SERIALNUMBER,
130     },
131     .full = &desc_device_wacom,
132     .str  = desc_strings,
133 };
134
135 static void usb_mouse_event(void *opaque,
136                             int dx1, int dy1, int dz1, int buttons_state)
137 {
138     USBWacomState *s = opaque;
139
140     s->dx += dx1;
141     s->dy += dy1;
142     s->dz += dz1;
143     s->buttons_state = buttons_state;
144     s->changed = 1;
145     usb_wakeup(s->intr, 0);
146 }
147
148 static void usb_wacom_event(void *opaque,
149                             int x, int y, int dz, int buttons_state)
150 {
151     USBWacomState *s = opaque;
152
153     /* scale to Penpartner resolution */
154     s->x = (x * 5040 / 0x7FFF);
155     s->y = (y * 3780 / 0x7FFF);
156     s->dz += dz;
157     s->buttons_state = buttons_state;
158     s->changed = 1;
159     usb_wakeup(s->intr, 0);
160 }
161
162 static inline int int_clamp(int val, int vmin, int vmax)
163 {
164     if (val < vmin)
165         return vmin;
166     else if (val > vmax)
167         return vmax;
168     else
169         return val;
170 }
171
172 static int usb_mouse_poll(USBWacomState *s, uint8_t *buf, int len)
173 {
174     int dx, dy, dz, b, l;
175
176     if (!s->mouse_grabbed) {
177         s->eh_entry = qemu_add_mouse_event_handler(usb_mouse_event, s, 0,
178                         "QEMU PenPartner tablet");
179         qemu_activate_mouse_event_handler(s->eh_entry);
180         s->mouse_grabbed = 1;
181     }
182
183     dx = int_clamp(s->dx, -128, 127);
184     dy = int_clamp(s->dy, -128, 127);
185     dz = int_clamp(s->dz, -128, 127);
186
187     s->dx -= dx;
188     s->dy -= dy;
189     s->dz -= dz;
190
191     b = 0;
192     if (s->buttons_state & MOUSE_EVENT_LBUTTON)
193         b |= 0x01;
194     if (s->buttons_state & MOUSE_EVENT_RBUTTON)
195         b |= 0x02;
196     if (s->buttons_state & MOUSE_EVENT_MBUTTON)
197         b |= 0x04;
198
199     buf[0] = b;
200     buf[1] = dx;
201     buf[2] = dy;
202     l = 3;
203     if (len >= 4) {
204         buf[3] = dz;
205         l = 4;
206     }
207     return l;
208 }
209
210 static int usb_wacom_poll(USBWacomState *s, uint8_t *buf, int len)
211 {
212     int b;
213
214     if (!s->mouse_grabbed) {
215         s->eh_entry = qemu_add_mouse_event_handler(usb_wacom_event, s, 1,
216                         "QEMU PenPartner tablet");
217         qemu_activate_mouse_event_handler(s->eh_entry);
218         s->mouse_grabbed = 1;
219     }
220
221     b = 0;
222     if (s->buttons_state & MOUSE_EVENT_LBUTTON)
223         b |= 0x01;
224     if (s->buttons_state & MOUSE_EVENT_RBUTTON)
225         b |= 0x40;
226     if (s->buttons_state & MOUSE_EVENT_MBUTTON)
227         b |= 0x20; /* eraser */
228
229     if (len < 7)
230         return 0;
231
232     buf[0] = s->mode;
233     buf[5] = 0x00 | (b & 0xf0);
234     buf[1] = s->x & 0xff;
235     buf[2] = s->x >> 8;
236     buf[3] = s->y & 0xff;
237     buf[4] = s->y >> 8;
238     if (b & 0x3f) {
239         buf[6] = 0;
240     } else {
241         buf[6] = (unsigned char) -127;
242     }
243
244     return 7;
245 }
246
247 static void usb_wacom_handle_reset(USBDevice *dev)
248 {
249     USBWacomState *s = (USBWacomState *) dev;
250
251     s->dx = 0;
252     s->dy = 0;
253     s->dz = 0;
254     s->x = 0;
255     s->y = 0;
256     s->buttons_state = 0;
257     s->mode = WACOM_MODE_HID;
258 }
259
260 static void usb_wacom_handle_control(USBDevice *dev, USBPacket *p,
261                int request, int value, int index, int length, uint8_t *data)
262 {
263     USBWacomState *s = (USBWacomState *) dev;
264     int ret;
265
266     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
267     if (ret >= 0) {
268         return;
269     }
270
271     switch (request) {
272     case WACOM_SET_REPORT:
273         if (s->mouse_grabbed) {
274             qemu_remove_mouse_event_handler(s->eh_entry);
275             s->mouse_grabbed = 0;
276         }
277         s->mode = data[0];
278         break;
279     case WACOM_GET_REPORT:
280         data[0] = 0;
281         data[1] = s->mode;
282         p->actual_length = 2;
283         break;
284     /* USB HID requests */
285     case HID_GET_REPORT:
286         if (s->mode == WACOM_MODE_HID)
287             p->actual_length = usb_mouse_poll(s, data, length);
288         else if (s->mode == WACOM_MODE_WACOM)
289             p->actual_length = usb_wacom_poll(s, data, length);
290         break;
291     case HID_GET_IDLE:
292         data[0] = s->idle;
293         p->actual_length = 1;
294         break;
295     case HID_SET_IDLE:
296         s->idle = (uint8_t) (value >> 8);
297         break;
298     default:
299         p->status = USB_RET_STALL;
300         break;
301     }
302 }
303
304 static void usb_wacom_handle_data(USBDevice *dev, USBPacket *p)
305 {
306     USBWacomState *s = (USBWacomState *) dev;
307     uint8_t buf[p->iov.size];
308     int len = 0;
309
310     switch (p->pid) {
311     case USB_TOKEN_IN:
312         if (p->ep->nr == 1) {
313             if (!(s->changed || s->idle)) {
314                 p->status = USB_RET_NAK;
315                 return;
316             }
317             s->changed = 0;
318             if (s->mode == WACOM_MODE_HID)
319                 len = usb_mouse_poll(s, buf, p->iov.size);
320             else if (s->mode == WACOM_MODE_WACOM)
321                 len = usb_wacom_poll(s, buf, p->iov.size);
322             usb_packet_copy(p, buf, len);
323             break;
324         }
325         /* Fall through.  */
326     case USB_TOKEN_OUT:
327     default:
328         p->status = USB_RET_STALL;
329     }
330 }
331
332 static void usb_wacom_handle_destroy(USBDevice *dev)
333 {
334     USBWacomState *s = (USBWacomState *) dev;
335
336     if (s->mouse_grabbed) {
337         qemu_remove_mouse_event_handler(s->eh_entry);
338         s->mouse_grabbed = 0;
339     }
340 }
341
342 static void usb_wacom_realize(USBDevice *dev, Error **errp)
343 {
344     USBWacomState *s = USB_WACOM(dev);
345     usb_desc_create_serial(dev);
346     usb_desc_init(dev);
347     s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
348     s->changed = 1;
349 }
350
351 static const VMStateDescription vmstate_usb_wacom = {
352     .name = "usb-wacom",
353     .unmigratable = 1,
354 };
355
356 static void usb_wacom_class_init(ObjectClass *klass, void *data)
357 {
358     DeviceClass *dc = DEVICE_CLASS(klass);
359     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
360
361     uc->product_desc   = "QEMU PenPartner Tablet";
362     uc->usb_desc       = &desc_wacom;
363     uc->realize        = usb_wacom_realize;
364     uc->handle_reset   = usb_wacom_handle_reset;
365     uc->handle_control = usb_wacom_handle_control;
366     uc->handle_data    = usb_wacom_handle_data;
367     uc->handle_destroy = usb_wacom_handle_destroy;
368     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
369     dc->desc = "QEMU PenPartner Tablet";
370     dc->vmsd = &vmstate_usb_wacom;
371 }
372
373 static const TypeInfo wacom_info = {
374     .name          = TYPE_USB_WACOM,
375     .parent        = TYPE_USB_DEVICE,
376     .instance_size = sizeof(USBWacomState),
377     .class_init    = usb_wacom_class_init,
378 };
379
380 static void usb_wacom_register_types(void)
381 {
382     type_register_static(&wacom_info);
383     usb_legacy_register(TYPE_USB_WACOM, "wacom-tablet", NULL);
384 }
385
386 type_init(usb_wacom_register_types)