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 "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_unrealize(USBDevice *dev, Error **errp)
 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->unrealize      = usb_wacom_unrealize;
 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)