backends/baum.c

   1 /*
   2  * QEMU Baum Braille Device
   3  *
   4  * Copyright (c) 2008 Samuel Thibault
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu/osdep.h"
  25 #include "qapi/error.h"
  26 #include "qemu-common.h"
  27 #include "sysemu/char.h"
  28 #include "qemu/timer.h"
  29 #include "hw/usb.h"
  30 #include <brlapi.h>
  31 #include <brlapi_constants.h>
  32 #include <brlapi_keycodes.h>
  33 #ifdef CONFIG_SDL
  34 #include <SDL_syswm.h>
  35 #endif
  36
  37 #if 0
  38 #define DPRINTF(fmt, ...) \
  39         printf(fmt, ## __VA_ARGS__)
  40 #else
  41 #define DPRINTF(fmt, ...)
  42 #endif
  43
  44 #define ESC 0x1B
  45
  46 #define BAUM_REQ_DisplayData            0x01
  47 #define BAUM_REQ_GetVersionNumber       0x05
  48 #define BAUM_REQ_GetKeys                0x08
  49 #define BAUM_REQ_SetMode                0x12
  50 #define BAUM_REQ_SetProtocol            0x15
  51 #define BAUM_REQ_GetDeviceIdentity      0x84
  52 #define BAUM_REQ_GetSerialNumber        0x8A
  53
  54 #define BAUM_RSP_CellCount              0x01
  55 #define BAUM_RSP_VersionNumber          0x05
  56 #define BAUM_RSP_ModeSetting            0x11
  57 #define BAUM_RSP_CommunicationChannel   0x16
  58 #define BAUM_RSP_PowerdownSignal        0x17
  59 #define BAUM_RSP_HorizontalSensors      0x20
  60 #define BAUM_RSP_VerticalSensors        0x21
  61 #define BAUM_RSP_RoutingKeys            0x22
  62 #define BAUM_RSP_Switches               0x23
  63 #define BAUM_RSP_TopKeys                0x24
  64 #define BAUM_RSP_HorizontalSensor       0x25
  65 #define BAUM_RSP_VerticalSensor         0x26
  66 #define BAUM_RSP_RoutingKey             0x27
  67 #define BAUM_RSP_FrontKeys6             0x28
  68 #define BAUM_RSP_BackKeys6              0x29
  69 #define BAUM_RSP_CommandKeys            0x2B
  70 #define BAUM_RSP_FrontKeys10            0x2C
  71 #define BAUM_RSP_BackKeys10             0x2D
  72 #define BAUM_RSP_EntryKeys              0x33
  73 #define BAUM_RSP_JoyStick               0x34
  74 #define BAUM_RSP_ErrorCode              0x40
  75 #define BAUM_RSP_InfoBlock              0x42
  76 #define BAUM_RSP_DeviceIdentity         0x84
  77 #define BAUM_RSP_SerialNumber           0x8A
  78 #define BAUM_RSP_BluetoothName          0x8C
  79
  80 #define BAUM_TL1 0x01
  81 #define BAUM_TL2 0x02
  82 #define BAUM_TL3 0x04
  83 #define BAUM_TR1 0x08
  84 #define BAUM_TR2 0x10
  85 #define BAUM_TR3 0x20
  86
  87 #define BUF_SIZE 256
  88
  89 typedef struct {
  90     CharDriverState *chr;
  91
  92     brlapi_handle_t *brlapi;
  93     int brlapi_fd;
  94     unsigned int x, y;
  95
  96     uint8_t in_buf[BUF_SIZE];
  97     uint8_t in_buf_used;
  98     uint8_t out_buf[BUF_SIZE];
  99     uint8_t out_buf_used, out_buf_ptr;
 100
 101     QEMUTimer *cellCount_timer;
 102 } BaumDriverState;
 103
 104 /* Let's assume NABCC by default */
 105 static const uint8_t nabcc_translation[256] = {
 106     [0] = ' ',
 107 #ifndef BRLAPI_DOTS
 108 #define BRLAPI_DOTS(d1,d2,d3,d4,d5,d6,d7,d8) \
 109     ((d1?BRLAPI_DOT1:0)|\
 110      (d2?BRLAPI_DOT2:0)|\
 111      (d3?BRLAPI_DOT3:0)|\
 112      (d4?BRLAPI_DOT4:0)|\
 113      (d5?BRLAPI_DOT5:0)|\
 114      (d6?BRLAPI_DOT6:0)|\
 115      (d7?BRLAPI_DOT7:0)|\
 116      (d8?BRLAPI_DOT8:0))
 117 #endif
 118     [BRLAPI_DOTS(1,0,0,0,0,0,0,0)] = 'a',
 119     [BRLAPI_DOTS(1,1,0,0,0,0,0,0)] = 'b',
 120     [BRLAPI_DOTS(1,0,0,1,0,0,0,0)] = 'c',
 121     [BRLAPI_DOTS(1,0,0,1,1,0,0,0)] = 'd',
 122     [BRLAPI_DOTS(1,0,0,0,1,0,0,0)] = 'e',
 123     [BRLAPI_DOTS(1,1,0,1,0,0,0,0)] = 'f',
 124     [BRLAPI_DOTS(1,1,0,1,1,0,0,0)] = 'g',
 125     [BRLAPI_DOTS(1,1,0,0,1,0,0,0)] = 'h',
 126     [BRLAPI_DOTS(0,1,0,1,0,0,0,0)] = 'i',
 127     [BRLAPI_DOTS(0,1,0,1,1,0,0,0)] = 'j',
 128     [BRLAPI_DOTS(1,0,1,0,0,0,0,0)] = 'k',
 129     [BRLAPI_DOTS(1,1,1,0,0,0,0,0)] = 'l',
 130     [BRLAPI_DOTS(1,0,1,1,0,0,0,0)] = 'm',
 131     [BRLAPI_DOTS(1,0,1,1,1,0,0,0)] = 'n',
 132     [BRLAPI_DOTS(1,0,1,0,1,0,0,0)] = 'o',
 133     [BRLAPI_DOTS(1,1,1,1,0,0,0,0)] = 'p',
 134     [BRLAPI_DOTS(1,1,1,1,1,0,0,0)] = 'q',
 135     [BRLAPI_DOTS(1,1,1,0,1,0,0,0)] = 'r',
 136     [BRLAPI_DOTS(0,1,1,1,0,0,0,0)] = 's',
 137     [BRLAPI_DOTS(0,1,1,1,1,0,0,0)] = 't',
 138     [BRLAPI_DOTS(1,0,1,0,0,1,0,0)] = 'u',
 139     [BRLAPI_DOTS(1,1,1,0,0,1,0,0)] = 'v',
 140     [BRLAPI_DOTS(0,1,0,1,1,1,0,0)] = 'w',
 141     [BRLAPI_DOTS(1,0,1,1,0,1,0,0)] = 'x',
 142     [BRLAPI_DOTS(1,0,1,1,1,1,0,0)] = 'y',
 143     [BRLAPI_DOTS(1,0,1,0,1,1,0,0)] = 'z',
 144
 145     [BRLAPI_DOTS(1,0,0,0,0,0,1,0)] = 'A',
 146     [BRLAPI_DOTS(1,1,0,0,0,0,1,0)] = 'B',
 147     [BRLAPI_DOTS(1,0,0,1,0,0,1,0)] = 'C',
 148     [BRLAPI_DOTS(1,0,0,1,1,0,1,0)] = 'D',
 149     [BRLAPI_DOTS(1,0,0,0,1,0,1,0)] = 'E',
 150     [BRLAPI_DOTS(1,1,0,1,0,0,1,0)] = 'F',
 151     [BRLAPI_DOTS(1,1,0,1,1,0,1,0)] = 'G',
 152     [BRLAPI_DOTS(1,1,0,0,1,0,1,0)] = 'H',
 153     [BRLAPI_DOTS(0,1,0,1,0,0,1,0)] = 'I',
 154     [BRLAPI_DOTS(0,1,0,1,1,0,1,0)] = 'J',
 155     [BRLAPI_DOTS(1,0,1,0,0,0,1,0)] = 'K',
 156     [BRLAPI_DOTS(1,1,1,0,0,0,1,0)] = 'L',
 157     [BRLAPI_DOTS(1,0,1,1,0,0,1,0)] = 'M',
 158     [BRLAPI_DOTS(1,0,1,1,1,0,1,0)] = 'N',
 159     [BRLAPI_DOTS(1,0,1,0,1,0,1,0)] = 'O',
 160     [BRLAPI_DOTS(1,1,1,1,0,0,1,0)] = 'P',
 161     [BRLAPI_DOTS(1,1,1,1,1,0,1,0)] = 'Q',
 162     [BRLAPI_DOTS(1,1,1,0,1,0,1,0)] = 'R',
 163     [BRLAPI_DOTS(0,1,1,1,0,0,1,0)] = 'S',
 164     [BRLAPI_DOTS(0,1,1,1,1,0,1,0)] = 'T',
 165     [BRLAPI_DOTS(1,0,1,0,0,1,1,0)] = 'U',
 166     [BRLAPI_DOTS(1,1,1,0,0,1,1,0)] = 'V',
 167     [BRLAPI_DOTS(0,1,0,1,1,1,1,0)] = 'W',
 168     [BRLAPI_DOTS(1,0,1,1,0,1,1,0)] = 'X',
 169     [BRLAPI_DOTS(1,0,1,1,1,1,1,0)] = 'Y',
 170     [BRLAPI_DOTS(1,0,1,0,1,1,1,0)] = 'Z',
 171
 172     [BRLAPI_DOTS(0,0,1,0,1,1,0,0)] = '0',
 173     [BRLAPI_DOTS(0,1,0,0,0,0,0,0)] = '1',
 174     [BRLAPI_DOTS(0,1,1,0,0,0,0,0)] = '2',
 175     [BRLAPI_DOTS(0,1,0,0,1,0,0,0)] = '3',
 176     [BRLAPI_DOTS(0,1,0,0,1,1,0,0)] = '4',
 177     [BRLAPI_DOTS(0,1,0,0,0,1,0,0)] = '5',
 178     [BRLAPI_DOTS(0,1,1,0,1,0,0,0)] = '6',
 179     [BRLAPI_DOTS(0,1,1,0,1,1,0,0)] = '7',
 180     [BRLAPI_DOTS(0,1,1,0,0,1,0,0)] = '8',
 181     [BRLAPI_DOTS(0,0,1,0,1,0,0,0)] = '9',
 182
 183     [BRLAPI_DOTS(0,0,0,1,0,1,0,0)] = '.',
 184     [BRLAPI_DOTS(0,0,1,1,0,1,0,0)] = '+',
 185     [BRLAPI_DOTS(0,0,1,0,0,1,0,0)] = '-',
 186     [BRLAPI_DOTS(1,0,0,0,0,1,0,0)] = '*',
 187     [BRLAPI_DOTS(0,0,1,1,0,0,0,0)] = '/',
 188     [BRLAPI_DOTS(1,1,1,0,1,1,0,0)] = '(',
 189     [BRLAPI_DOTS(0,1,1,1,1,1,0,0)] = ')',
 190
 191     [BRLAPI_DOTS(1,1,1,1,0,1,0,0)] = '&',
 192     [BRLAPI_DOTS(0,0,1,1,1,1,0,0)] = '#',
 193
 194     [BRLAPI_DOTS(0,0,0,0,0,1,0,0)] = ',',
 195     [BRLAPI_DOTS(0,0,0,0,1,1,0,0)] = ';',
 196     [BRLAPI_DOTS(1,0,0,0,1,1,0,0)] = ':',
 197     [BRLAPI_DOTS(0,1,1,1,0,1,0,0)] = '!',
 198     [BRLAPI_DOTS(1,0,0,1,1,1,0,0)] = '?',
 199     [BRLAPI_DOTS(0,0,0,0,1,0,0,0)] = '"',
 200     [BRLAPI_DOTS(0,0,1,0,0,0,0,0)] ='\'',
 201     [BRLAPI_DOTS(0,0,0,1,0,0,0,0)] = '`',
 202     [BRLAPI_DOTS(0,0,0,1,1,0,1,0)] = '^',
 203     [BRLAPI_DOTS(0,0,0,1,1,0,0,0)] = '~',
 204     [BRLAPI_DOTS(0,1,0,1,0,1,1,0)] = '[',
 205     [BRLAPI_DOTS(1,1,0,1,1,1,1,0)] = ']',
 206     [BRLAPI_DOTS(0,1,0,1,0,1,0,0)] = '{',
 207     [BRLAPI_DOTS(1,1,0,1,1,1,0,0)] = '}',
 208     [BRLAPI_DOTS(1,1,1,1,1,1,0,0)] = '=',
 209     [BRLAPI_DOTS(1,1,0,0,0,1,0,0)] = '<',
 210     [BRLAPI_DOTS(0,0,1,1,1,0,0,0)] = '>',
 211     [BRLAPI_DOTS(1,1,0,1,0,1,0,0)] = '$',
 212     [BRLAPI_DOTS(1,0,0,1,0,1,0,0)] = '%',
 213     [BRLAPI_DOTS(0,0,0,1,0,0,1,0)] = '@',
 214     [BRLAPI_DOTS(1,1,0,0,1,1,0,0)] = '|',
 215     [BRLAPI_DOTS(1,1,0,0,1,1,1,0)] ='\\',
 216     [BRLAPI_DOTS(0,0,0,1,1,1,0,0)] = '_',
 217 };
 218
 219 /* The serial port can receive more of our data */
 220 static void baum_accept_input(struct CharDriverState *chr)
 221 {
 222     BaumDriverState *baum = chr->opaque;
 223     int room, first;
 224
 225     if (!baum->out_buf_used)
 226         return;
 227     room = qemu_chr_be_can_write(chr);
 228     if (!room)
 229         return;
 230     if (room > baum->out_buf_used)
 231         room = baum->out_buf_used;
 232
 233     first = BUF_SIZE - baum->out_buf_ptr;
 234     if (room > first) {
 235         qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, first);
 236         baum->out_buf_ptr = 0;
 237         baum->out_buf_used -= first;
 238         room -= first;
 239     }
 240     qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, room);
 241     baum->out_buf_ptr += room;
 242     baum->out_buf_used -= room;
 243 }
 244
 245 /* We want to send a packet */
 246 static void baum_write_packet(BaumDriverState *baum, const uint8_t *buf, int len)
 247 {
 248     uint8_t io_buf[1 + 2 * len], *cur = io_buf;
 249     int room;
 250     *cur++ = ESC;
 251     while (len--)
 252         if ((*cur++ = *buf++) == ESC)
 253             *cur++ = ESC;
 254     room = qemu_chr_be_can_write(baum->chr);
 255     len = cur - io_buf;
 256     if (len <= room) {
 257         /* Fits */
 258         qemu_chr_be_write(baum->chr, io_buf, len);
 259     } else {
 260         int first;
 261         uint8_t out;
 262         /* Can't fit all, send what can be, and store the rest. */
 263         qemu_chr_be_write(baum->chr, io_buf, room);
 264         len -= room;
 265         cur = io_buf + room;
 266         if (len > BUF_SIZE - baum->out_buf_used) {
 267             /* Can't even store it, drop the previous data... */
 268             assert(len <= BUF_SIZE);
 269             baum->out_buf_used = 0;
 270             baum->out_buf_ptr = 0;
 271         }
 272         out = baum->out_buf_ptr;
 273         baum->out_buf_used += len;
 274         first = BUF_SIZE - baum->out_buf_ptr;
 275         if (len > first) {
 276             memcpy(baum->out_buf + out, cur, first);
 277             out = 0;
 278             len -= first;
 279             cur += first;
 280         }
 281         memcpy(baum->out_buf + out, cur, len);
 282     }
 283 }
 284
 285 /* Called when the other end seems to have a wrong idea of our display size */
 286 static void baum_cellCount_timer_cb(void *opaque)
 287 {
 288     BaumDriverState *baum = opaque;
 289     uint8_t cell_count[] = { BAUM_RSP_CellCount, baum->x * baum->y };
 290     DPRINTF("Timeout waiting for DisplayData, sending cell count\n");
 291     baum_write_packet(baum, cell_count, sizeof(cell_count));
 292 }
 293
 294 /* Try to interpret a whole incoming packet */
 295 static int baum_eat_packet(BaumDriverState *baum, const uint8_t *buf, int len)
 296 {
 297     const uint8_t *cur = buf;
 298     uint8_t req = 0;
 299
 300     if (!len--)
 301         return 0;
 302     if (*cur++ != ESC) {
 303         while (*cur != ESC) {
 304             if (!len--)
 305                 return 0;
 306             cur++;
 307         }
 308         DPRINTF("Dropped %td bytes!\n", cur - buf);
 309     }
 310
 311 #define EAT(c) do {\
 312     if (!len--) \
 313         return 0; \
 314     if ((c = *cur++) == ESC) { \
 315         if (!len--) \
 316             return 0; \
 317         if (*cur++ != ESC) { \
 318             DPRINTF("Broken packet %#2x, tossing\n", req); \
 319             if (timer_pending(baum->cellCount_timer)) {    \
 320                 timer_del(baum->cellCount_timer);     \
 321                 baum_cellCount_timer_cb(baum);             \
 322             } \
 323             return (cur - 2 - buf); \
 324         } \
 325     } \
 326 } while (0)
 327
 328     EAT(req);
 329     switch (req) {
 330     case BAUM_REQ_DisplayData:
 331     {
 332         uint8_t cells[baum->x * baum->y], c;
 333         uint8_t text[baum->x * baum->y];
 334         uint8_t zero[baum->x * baum->y];
 335         int cursor = BRLAPI_CURSOR_OFF;
 336         int i;
 337
 338         /* Allow 100ms to complete the DisplayData packet */
 339         timer_mod(baum->cellCount_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
 340                        NANOSECONDS_PER_SECOND / 10);
 341         for (i = 0; i < baum->x * baum->y ; i++) {
 342             EAT(c);
 343             cells[i] = c;
 344             if ((c & (BRLAPI_DOT7|BRLAPI_DOT8))
 345                     == (BRLAPI_DOT7|BRLAPI_DOT8)) {
 346                 cursor = i + 1;
 347                 c &= ~(BRLAPI_DOT7|BRLAPI_DOT8);
 348             }
 349             if (!(c = nabcc_translation[c]))
 350                 c = '?';
 351             text[i] = c;
 352         }
 353         timer_del(baum->cellCount_timer);
 354
 355         memset(zero, 0, sizeof(zero));
 356
 357         brlapi_writeArguments_t wa = {
 358             .displayNumber = BRLAPI_DISPLAY_DEFAULT,
 359             .regionBegin = 1,
 360             .regionSize = baum->x * baum->y,
 361             .text = (char *)text,
 362             .textSize = baum->x * baum->y,
 363             .andMask = zero,
 364             .orMask = cells,
 365             .cursor = cursor,
 366             .charset = (char *)"ISO-8859-1",
 367         };
 368
 369         if (brlapi__write(baum->brlapi, &wa) == -1)
 370             brlapi_perror("baum brlapi_write");
 371         break;
 372     }
 373     case BAUM_REQ_SetMode:
 374     {
 375         uint8_t mode, setting;
 376         DPRINTF("SetMode\n");
 377         EAT(mode);
 378         EAT(setting);
 379         /* ignore */
 380         break;
 381     }
 382     case BAUM_REQ_SetProtocol:
 383     {
 384         uint8_t protocol;
 385         DPRINTF("SetProtocol\n");
 386         EAT(protocol);
 387         /* ignore */
 388         break;
 389     }
 390     case BAUM_REQ_GetDeviceIdentity:
 391     {
 392         uint8_t identity[17] = { BAUM_RSP_DeviceIdentity,
 393             'B','a','u','m',' ','V','a','r','i','o' };
 394         DPRINTF("GetDeviceIdentity\n");
 395         identity[11] = '0' + baum->x / 10;
 396         identity[12] = '0' + baum->x % 10;
 397         baum_write_packet(baum, identity, sizeof(identity));
 398         break;
 399     }
 400     case BAUM_REQ_GetVersionNumber:
 401     {
 402         uint8_t version[] = { BAUM_RSP_VersionNumber, 1 }; /* ? */
 403         DPRINTF("GetVersionNumber\n");
 404         baum_write_packet(baum, version, sizeof(version));
 405         break;
 406     }
 407     case BAUM_REQ_GetSerialNumber:
 408     {
 409         uint8_t serial[] = { BAUM_RSP_SerialNumber,
 410             '0','0','0','0','0','0','0','0' };
 411         DPRINTF("GetSerialNumber\n");
 412         baum_write_packet(baum, serial, sizeof(serial));
 413         break;
 414     }
 415     case BAUM_REQ_GetKeys:
 416     {
 417         DPRINTF("Get%0#2x\n", req);
 418         /* ignore */
 419         break;
 420     }
 421     default:
 422         DPRINTF("unrecognized request %0#2x\n", req);
 423         do
 424             if (!len--)
 425                 return 0;
 426         while (*cur++ != ESC);
 427         cur--;
 428         break;
 429     }
 430     return cur - buf;
 431 }
 432
 433 /* The other end is writing some data.  Store it and try to interpret */
 434 static int baum_write(CharDriverState *chr, const uint8_t *buf, int len)
 435 {
 436     BaumDriverState *baum = chr->opaque;
 437     int tocopy, cur, eaten, orig_len = len;
 438
 439     if (!len)
 440         return 0;
 441     if (!baum->brlapi)
 442         return len;
 443
 444     while (len) {
 445         /* Complete our buffer as much as possible */
 446         tocopy = len;
 447         if (tocopy > BUF_SIZE - baum->in_buf_used)
 448             tocopy = BUF_SIZE - baum->in_buf_used;
 449
 450         memcpy(baum->in_buf + baum->in_buf_used, buf, tocopy);
 451         baum->in_buf_used += tocopy;
 452         buf += tocopy;
 453         len -= tocopy;
 454
 455         /* Interpret it as much as possible */
 456         cur = 0;
 457         while (cur < baum->in_buf_used &&
 458                 (eaten = baum_eat_packet(baum, baum->in_buf + cur, baum->in_buf_used - cur)))
 459             cur += eaten;
 460
 461         /* Shift the remainder */
 462         if (cur) {
 463             memmove(baum->in_buf, baum->in_buf + cur, baum->in_buf_used - cur);
 464             baum->in_buf_used -= cur;
 465         }
 466
 467         /* And continue if any data left */
 468     }
 469     return orig_len;
 470 }
 471
 472 /* Send the key code to the other end */
 473 static void baum_send_key(BaumDriverState *baum, uint8_t type, uint8_t value) {
 474     uint8_t packet[] = { type, value };
 475     DPRINTF("writing key %x %x\n", type, value);
 476     baum_write_packet(baum, packet, sizeof(packet));
 477 }
 478
 479 /* We got some data on the BrlAPI socket */
 480 static void baum_chr_read(void *opaque)
 481 {
 482     BaumDriverState *baum = opaque;
 483     brlapi_keyCode_t code;
 484     int ret;
 485     if (!baum->brlapi)
 486         return;
 487     while ((ret = brlapi__readKey(baum->brlapi, 0, &code)) == 1) {
 488         DPRINTF("got key %"BRLAPI_PRIxKEYCODE"\n", code);
 489         /* Emulate */
 490         switch (code & BRLAPI_KEY_TYPE_MASK) {
 491         case BRLAPI_KEY_TYPE_CMD:
 492             switch (code & BRLAPI_KEY_CMD_BLK_MASK) {
 493             case BRLAPI_KEY_CMD_ROUTE:
 494                 baum_send_key(baum, BAUM_RSP_RoutingKey, (code & BRLAPI_KEY_CMD_ARG_MASK)+1);
 495                 baum_send_key(baum, BAUM_RSP_RoutingKey, 0);
 496                 break;
 497             case 0:
 498                 switch (code & BRLAPI_KEY_CMD_ARG_MASK) {
 499                 case BRLAPI_KEY_CMD_FWINLT:
 500                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2);
 501                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 502                     break;
 503                 case BRLAPI_KEY_CMD_FWINRT:
 504                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR2);
 505                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 506                     break;
 507                 case BRLAPI_KEY_CMD_LNUP:
 508                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR1);
 509                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 510                     break;
 511                 case BRLAPI_KEY_CMD_LNDN:
 512                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR3);
 513                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 514                     break;
 515                 case BRLAPI_KEY_CMD_TOP:
 516                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TR1);
 517                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 518                     break;
 519                 case BRLAPI_KEY_CMD_BOT:
 520                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL3|BAUM_TR3);
 521                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 522                     break;
 523                 case BRLAPI_KEY_CMD_TOP_LEFT:
 524                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1);
 525                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 526                     break;
 527                 case BRLAPI_KEY_CMD_BOT_LEFT:
 528                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR3);
 529                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 530                     break;
 531                 case BRLAPI_KEY_CMD_HOME:
 532                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1|BAUM_TR3);
 533                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 534                     break;
 535                 case BRLAPI_KEY_CMD_PREFMENU:
 536                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TL3|BAUM_TR1);
 537                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 538                     break;
 539                 }
 540             }
 541             break;
 542         case BRLAPI_KEY_TYPE_SYM:
 543             break;
 544         }
 545     }
 546     if (ret == -1 && (brlapi_errno != BRLAPI_ERROR_LIBCERR || errno != EINTR)) {
 547         brlapi_perror("baum: brlapi_readKey");
 548         brlapi__closeConnection(baum->brlapi);
 549         g_free(baum->brlapi);
 550         baum->brlapi = NULL;
 551     }
 552 }
 553
 554 static void baum_free(struct CharDriverState *chr)
 555 {
 556     BaumDriverState *baum = chr->opaque;
 557
 558     timer_free(baum->cellCount_timer);
 559     if (baum->brlapi) {
 560         brlapi__closeConnection(baum->brlapi);
 561         g_free(baum->brlapi);
 562     }
 563     g_free(baum);
 564 }
 565
 566 static CharDriverState *chr_baum_init(const char *id,
 567                                       ChardevBackend *backend,
 568                                       ChardevReturn *ret,
 569                                       bool *be_opened,
 570                                       Error **errp)
 571 {
 572     ChardevCommon *common = backend->u.braille.data;
 573     BaumDriverState *baum;
 574     CharDriverState *chr;
 575     brlapi_handle_t *handle;
 576 #if defined(CONFIG_SDL)
 577 #if SDL_COMPILEDVERSION < SDL_VERSIONNUM(2, 0, 0)
 578     SDL_SysWMinfo info;
 579 #endif
 580 #endif
 581     int tty;
 582
 583     chr = qemu_chr_alloc(common, errp);
 584     if (!chr) {
 585         return NULL;
 586     }
 587     baum = g_malloc0(sizeof(BaumDriverState));
 588     baum->chr = chr;
 589
 590     chr->opaque = baum;
 591     chr->chr_write = baum_write;
 592     chr->chr_accept_input = baum_accept_input;
 593     chr->chr_free = baum_free;
 594
 595     handle = g_malloc0(brlapi_getHandleSize());
 596     baum->brlapi = handle;
 597
 598     baum->brlapi_fd = brlapi__openConnection(handle, NULL, NULL);
 599     if (baum->brlapi_fd == -1) {
 600         error_setg(errp, "brlapi__openConnection: %s",
 601                    brlapi_strerror(brlapi_error_location()));
 602         goto fail_handle;
 603     }
 604
 605     baum->cellCount_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, baum_cellCount_timer_cb, baum);
 606
 607     if (brlapi__getDisplaySize(handle, &baum->x, &baum->y) == -1) {
 608         error_setg(errp, "brlapi__getDisplaySize: %s",
 609                    brlapi_strerror(brlapi_error_location()));
 610         goto fail;
 611     }
 612
 613 #if defined(CONFIG_SDL)
 614 #if SDL_COMPILEDVERSION < SDL_VERSIONNUM(2, 0, 0)
 615     memset(&info, 0, sizeof(info));
 616     SDL_VERSION(&info.version);
 617     if (SDL_GetWMInfo(&info))
 618         tty = info.info.x11.wmwindow;
 619     else
 620 #endif
 621 #endif
 622         tty = BRLAPI_TTY_DEFAULT;
 623
 624     if (brlapi__enterTtyMode(handle, tty, NULL) == -1) {
 625         error_setg(errp, "brlapi__enterTtyMode: %s",
 626                    brlapi_strerror(brlapi_error_location()));
 627         goto fail;
 628     }
 629
 630     qemu_set_fd_handler(baum->brlapi_fd, baum_chr_read, NULL, baum);
 631
 632     return chr;
 633
 634 fail:
 635     timer_free(baum->cellCount_timer);
 636     brlapi__closeConnection(handle);
 637 fail_handle:
 638     g_free(handle);
 639     g_free(chr);
 640     g_free(baum);
 641     return NULL;
 642 }
 643
 644 static void register_types(void)
 645 {
 646     register_char_driver("braille", CHARDEV_BACKEND_KIND_BRAILLE, NULL,
 647                          chr_baum_init);
 648 }
 649
 650 type_init(register_types);