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29#include "qemu/osdep.h"
30#include "ui/console.h"
31#include "hw/usb.h"
32#include "hw/usb/hid.h"
33#include "migration/vmstate.h"
34#include "qemu/module.h"
35#include "desc.h"
36#include "qom/object.h"
37
38
39#define WACOM_GET_REPORT 0x2101
40#define WACOM_SET_REPORT 0x2109
41
42struct USBWacomState {
43 USBDevice dev;
44 USBEndpoint *intr;
45 QEMUPutMouseEntry *eh_entry;
46 int dx, dy, dz, buttons_state;
47 int x, y;
48 int mouse_grabbed;
49 enum {
50 WACOM_MODE_HID = 1,
51 WACOM_MODE_WACOM = 2,
52 } mode;
53 uint8_t idle;
54 int changed;
55};
56
57#define TYPE_USB_WACOM "usb-wacom-tablet"
58OBJECT_DECLARE_SIMPLE_TYPE(USBWacomState, USB_WACOM)
59
60enum {
61 STR_MANUFACTURER = 1,
62 STR_PRODUCT,
63 STR_SERIALNUMBER,
64};
65
66static const USBDescStrings desc_strings = {
67 [STR_MANUFACTURER] = "QEMU",
68 [STR_PRODUCT] = "Wacom PenPartner",
69 [STR_SERIALNUMBER] = "1",
70};
71
72static const USBDescIface desc_iface_wacom = {
73 .bInterfaceNumber = 0,
74 .bNumEndpoints = 1,
75 .bInterfaceClass = USB_CLASS_HID,
76 .bInterfaceSubClass = 0x01,
77 .bInterfaceProtocol = 0x02,
78 .ndesc = 1,
79 .descs = (USBDescOther[]) {
80 {
81
82 .data = (uint8_t[]) {
83 0x09,
84 USB_DT_HID,
85 0x01, 0x10,
86 0x00,
87 0x01,
88 USB_DT_REPORT,
89 0x6e, 0,
90 },
91 },
92 },
93 .eps = (USBDescEndpoint[]) {
94 {
95 .bEndpointAddress = USB_DIR_IN | 0x01,
96 .bmAttributes = USB_ENDPOINT_XFER_INT,
97 .wMaxPacketSize = 8,
98 .bInterval = 0x0a,
99 },
100 },
101};
102
103static const USBDescDevice desc_device_wacom = {
104 .bcdUSB = 0x0110,
105 .bMaxPacketSize0 = 8,
106 .bNumConfigurations = 1,
107 .confs = (USBDescConfig[]) {
108 {
109 .bNumInterfaces = 1,
110 .bConfigurationValue = 1,
111 .bmAttributes = USB_CFG_ATT_ONE,
112 .bMaxPower = 40,
113 .nif = 1,
114 .ifs = &desc_iface_wacom,
115 },
116 },
117};
118
119static const USBDesc desc_wacom = {
120 .id = {
121 .idVendor = 0x056a,
122 .idProduct = 0x0000,
123 .bcdDevice = 0x4210,
124 .iManufacturer = STR_MANUFACTURER,
125 .iProduct = STR_PRODUCT,
126 .iSerialNumber = STR_SERIALNUMBER,
127 },
128 .full = &desc_device_wacom,
129 .str = desc_strings,
130};
131
132static void usb_mouse_event(void *opaque,
133 int dx1, int dy1, int dz1, int buttons_state)
134{
135 USBWacomState *s = opaque;
136
137 s->dx += dx1;
138 s->dy += dy1;
139 s->dz += dz1;
140 s->buttons_state = buttons_state;
141 s->changed = 1;
142 usb_wakeup(s->intr, 0);
143}
144
145static void usb_wacom_event(void *opaque,
146 int x, int y, int dz, int buttons_state)
147{
148 USBWacomState *s = opaque;
149
150
151 s->x = (x * 5040 / 0x7FFF);
152 s->y = (y * 3780 / 0x7FFF);
153 s->dz += dz;
154 s->buttons_state = buttons_state;
155 s->changed = 1;
156 usb_wakeup(s->intr, 0);
157}
158
159static inline int int_clamp(int val, int vmin, int vmax)
160{
161 if (val < vmin)
162 return vmin;
163 else if (val > vmax)
164 return vmax;
165 else
166 return val;
167}
168
169static int usb_mouse_poll(USBWacomState *s, uint8_t *buf, int len)
170{
171 int dx, dy, dz, b, l;
172
173 if (!s->mouse_grabbed) {
174 s->eh_entry = qemu_add_mouse_event_handler(usb_mouse_event, s, 0,
175 "QEMU PenPartner tablet");
176 qemu_activate_mouse_event_handler(s->eh_entry);
177 s->mouse_grabbed = 1;
178 }
179
180 dx = int_clamp(s->dx, -128, 127);
181 dy = int_clamp(s->dy, -128, 127);
182 dz = int_clamp(s->dz, -128, 127);
183
184 s->dx -= dx;
185 s->dy -= dy;
186 s->dz -= dz;
187
188 b = 0;
189 if (s->buttons_state & MOUSE_EVENT_LBUTTON)
190 b |= 0x01;
191 if (s->buttons_state & MOUSE_EVENT_RBUTTON)
192 b |= 0x02;
193 if (s->buttons_state & MOUSE_EVENT_MBUTTON)
194 b |= 0x04;
195
196 buf[0] = b;
197 buf[1] = dx;
198 buf[2] = dy;
199 l = 3;
200 if (len >= 4) {
201 buf[3] = dz;
202 l = 4;
203 }
204 return l;
205}
206
207static int usb_wacom_poll(USBWacomState *s, uint8_t *buf, int len)
208{
209 int b;
210
211 if (!s->mouse_grabbed) {
212 s->eh_entry = qemu_add_mouse_event_handler(usb_wacom_event, s, 1,
213 "QEMU PenPartner tablet");
214 qemu_activate_mouse_event_handler(s->eh_entry);
215 s->mouse_grabbed = 1;
216 }
217
218 b = 0;
219 if (s->buttons_state & MOUSE_EVENT_LBUTTON)
220 b |= 0x01;
221 if (s->buttons_state & MOUSE_EVENT_RBUTTON)
222 b |= 0x40;
223 if (s->buttons_state & MOUSE_EVENT_MBUTTON)
224 b |= 0x20;
225
226 if (len < 7)
227 return 0;
228
229 buf[0] = s->mode;
230 buf[5] = 0x00 | (b & 0xf0);
231 buf[1] = s->x & 0xff;
232 buf[2] = s->x >> 8;
233 buf[3] = s->y & 0xff;
234 buf[4] = s->y >> 8;
235 if (b & 0x3f) {
236 buf[6] = 0;
237 } else {
238 buf[6] = (unsigned char) -127;
239 }
240
241 return 7;
242}
243
244static void usb_wacom_handle_reset(USBDevice *dev)
245{
246 USBWacomState *s = (USBWacomState *) dev;
247
248 s->dx = 0;
249 s->dy = 0;
250 s->dz = 0;
251 s->x = 0;
252 s->y = 0;
253 s->buttons_state = 0;
254 s->mode = WACOM_MODE_HID;
255}
256
257static void usb_wacom_handle_control(USBDevice *dev, USBPacket *p,
258 int request, int value, int index, int length, uint8_t *data)
259{
260 USBWacomState *s = (USBWacomState *) dev;
261 int ret;
262
263 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
264 if (ret >= 0) {
265 return;
266 }
267
268 switch (request) {
269 case WACOM_SET_REPORT:
270 if (s->mouse_grabbed) {
271 qemu_remove_mouse_event_handler(s->eh_entry);
272 s->mouse_grabbed = 0;
273 }
274 s->mode = data[0];
275 break;
276 case WACOM_GET_REPORT:
277 data[0] = 0;
278 data[1] = s->mode;
279 p->actual_length = 2;
280 break;
281
282 case HID_GET_REPORT:
283 if (s->mode == WACOM_MODE_HID)
284 p->actual_length = usb_mouse_poll(s, data, length);
285 else if (s->mode == WACOM_MODE_WACOM)
286 p->actual_length = usb_wacom_poll(s, data, length);
287 break;
288 case HID_GET_IDLE:
289 data[0] = s->idle;
290 p->actual_length = 1;
291 break;
292 case HID_SET_IDLE:
293 s->idle = (uint8_t) (value >> 8);
294 break;
295 default:
296 p->status = USB_RET_STALL;
297 break;
298 }
299}
300
301static void usb_wacom_handle_data(USBDevice *dev, USBPacket *p)
302{
303 USBWacomState *s = (USBWacomState *) dev;
304 g_autofree uint8_t *buf = g_malloc(p->iov.size);
305 int len = 0;
306
307 switch (p->pid) {
308 case USB_TOKEN_IN:
309 if (p->ep->nr == 1) {
310 if (!(s->changed || s->idle)) {
311 p->status = USB_RET_NAK;
312 return;
313 }
314 s->changed = 0;
315 if (s->mode == WACOM_MODE_HID)
316 len = usb_mouse_poll(s, buf, p->iov.size);
317 else if (s->mode == WACOM_MODE_WACOM)
318 len = usb_wacom_poll(s, buf, p->iov.size);
319 usb_packet_copy(p, buf, len);
320 break;
321 }
322
323 case USB_TOKEN_OUT:
324 default:
325 p->status = USB_RET_STALL;
326 }
327}
328
329static void usb_wacom_unrealize(USBDevice *dev)
330{
331 USBWacomState *s = (USBWacomState *) dev;
332
333 if (s->mouse_grabbed) {
334 qemu_remove_mouse_event_handler(s->eh_entry);
335 s->mouse_grabbed = 0;
336 }
337}
338
339static void usb_wacom_realize(USBDevice *dev, Error **errp)
340{
341 USBWacomState *s = USB_WACOM(dev);
342 usb_desc_create_serial(dev);
343 usb_desc_init(dev);
344 s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
345 s->changed = 1;
346}
347
348static const VMStateDescription vmstate_usb_wacom = {
349 .name = "usb-wacom",
350 .unmigratable = 1,
351};
352
353static void usb_wacom_class_init(ObjectClass *klass, void *data)
354{
355 DeviceClass *dc = DEVICE_CLASS(klass);
356 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
357
358 uc->product_desc = "QEMU PenPartner Tablet";
359 uc->usb_desc = &desc_wacom;
360 uc->realize = usb_wacom_realize;
361 uc->handle_reset = usb_wacom_handle_reset;
362 uc->handle_control = usb_wacom_handle_control;
363 uc->handle_data = usb_wacom_handle_data;
364 uc->unrealize = usb_wacom_unrealize;
365 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
366 dc->desc = "QEMU PenPartner Tablet";
367 dc->vmsd = &vmstate_usb_wacom;
368}
369
370static const TypeInfo wacom_info = {
371 .name = TYPE_USB_WACOM,
372 .parent = TYPE_USB_DEVICE,
373 .instance_size = sizeof(USBWacomState),
374 .class_init = usb_wacom_class_init,
375};
376
377static void usb_wacom_register_types(void)
378{
379 type_register_static(&wacom_info);
380 usb_legacy_register(TYPE_USB_WACOM, "wacom-tablet", NULL);
381}
382
383type_init(usb_wacom_register_types)
384
