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