backends/baum.c

   1 /*
   2  * QEMU Baum Braille Device
   3  *
   4  * Copyright (c) 2008, 2010-2011, 2016 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 "ui/console.h"
  31 #include <brlapi.h>
  32 #include <brlapi_constants.h>
  33 #include <brlapi_keycodes.h>
  34
  35 #if 0
  36 #define DPRINTF(fmt, ...) \
  37         printf(fmt, ## __VA_ARGS__)
  38 #else
  39 #define DPRINTF(fmt, ...)
  40 #endif
  41
  42 #define ESC 0x1B
  43
  44 #define BAUM_REQ_DisplayData            0x01
  45 #define BAUM_REQ_GetVersionNumber       0x05
  46 #define BAUM_REQ_GetKeys                0x08
  47 #define BAUM_REQ_SetMode                0x12
  48 #define BAUM_REQ_SetProtocol            0x15
  49 #define BAUM_REQ_GetDeviceIdentity      0x84
  50 #define BAUM_REQ_GetSerialNumber        0x8A
  51
  52 #define BAUM_RSP_CellCount              0x01
  53 #define BAUM_RSP_VersionNumber          0x05
  54 #define BAUM_RSP_ModeSetting            0x11
  55 #define BAUM_RSP_CommunicationChannel   0x16
  56 #define BAUM_RSP_PowerdownSignal        0x17
  57 #define BAUM_RSP_HorizontalSensors      0x20
  58 #define BAUM_RSP_VerticalSensors        0x21
  59 #define BAUM_RSP_RoutingKeys            0x22
  60 #define BAUM_RSP_Switches               0x23
  61 #define BAUM_RSP_TopKeys                0x24
  62 #define BAUM_RSP_HorizontalSensor       0x25
  63 #define BAUM_RSP_VerticalSensor         0x26
  64 #define BAUM_RSP_RoutingKey             0x27
  65 #define BAUM_RSP_FrontKeys6             0x28
  66 #define BAUM_RSP_BackKeys6              0x29
  67 #define BAUM_RSP_CommandKeys            0x2B
  68 #define BAUM_RSP_FrontKeys10            0x2C
  69 #define BAUM_RSP_BackKeys10             0x2D
  70 #define BAUM_RSP_EntryKeys              0x33
  71 #define BAUM_RSP_JoyStick               0x34
  72 #define BAUM_RSP_ErrorCode              0x40
  73 #define BAUM_RSP_InfoBlock              0x42
  74 #define BAUM_RSP_DeviceIdentity         0x84
  75 #define BAUM_RSP_SerialNumber           0x8A
  76 #define BAUM_RSP_BluetoothName          0x8C
  77
  78 #define BAUM_TL1 0x01
  79 #define BAUM_TL2 0x02
  80 #define BAUM_TL3 0x04
  81 #define BAUM_TR1 0x08
  82 #define BAUM_TR2 0x10
  83 #define BAUM_TR3 0x20
  84
  85 #define BUF_SIZE 256
  86
  87 typedef struct {
  88     CharDriverState parent;
  89
  90     brlapi_handle_t *brlapi;
  91     int brlapi_fd;
  92     unsigned int x, y;
  93     bool deferred_init;
  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 enum way {
 105     DOTS2ASCII,
 106     ASCII2DOTS
 107 };
 108 static const uint8_t nabcc_translation[2][256] = {
 109 #ifndef BRLAPI_DOTS
 110 #define BRLAPI_DOTS(d1,d2,d3,d4,d5,d6,d7,d8) \
 111     ((d1?BRLAPI_DOT1:0)|\
 112      (d2?BRLAPI_DOT2:0)|\
 113      (d3?BRLAPI_DOT3:0)|\
 114      (d4?BRLAPI_DOT4:0)|\
 115      (d5?BRLAPI_DOT5:0)|\
 116      (d6?BRLAPI_DOT6:0)|\
 117      (d7?BRLAPI_DOT7:0)|\
 118      (d8?BRLAPI_DOT8:0))
 119 #endif
 120 #define DO(dots, ascii) \
 121     [DOTS2ASCII][dots] = ascii, \
 122     [ASCII2DOTS][ascii] = dots
 123     DO(0, ' '),
 124     DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 0, 0), 'a'),
 125     DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 0, 0), 'b'),
 126     DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 0, 0), 'c'),
 127     DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 0, 0), 'd'),
 128     DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 0, 0), 'e'),
 129     DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 0, 0), 'f'),
 130     DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 0, 0), 'g'),
 131     DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 0, 0), 'h'),
 132     DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 0, 0), 'i'),
 133     DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 0, 0), 'j'),
 134     DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 0, 0), 'k'),
 135     DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 0, 0), 'l'),
 136     DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 0, 0), 'm'),
 137     DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 0, 0), 'n'),
 138     DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 0, 0), 'o'),
 139     DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 0, 0), 'p'),
 140     DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 0, 0), 'q'),
 141     DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 0, 0), 'r'),
 142     DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 0, 0), 's'),
 143     DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 0, 0), 't'),
 144     DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 0, 0), 'u'),
 145     DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 0, 0), 'v'),
 146     DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 0, 0), 'w'),
 147     DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 0, 0), 'x'),
 148     DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 0, 0), 'y'),
 149     DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 0, 0), 'z'),
 150
 151     DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 1, 0), 'A'),
 152     DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 1, 0), 'B'),
 153     DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 1, 0), 'C'),
 154     DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 1, 0), 'D'),
 155     DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 1, 0), 'E'),
 156     DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 1, 0), 'F'),
 157     DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 1, 0), 'G'),
 158     DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 1, 0), 'H'),
 159     DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 1, 0), 'I'),
 160     DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 1, 0), 'J'),
 161     DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 1, 0), 'K'),
 162     DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 1, 0), 'L'),
 163     DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 1, 0), 'M'),
 164     DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 1, 0), 'N'),
 165     DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 1, 0), 'O'),
 166     DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 1, 0), 'P'),
 167     DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 1, 0), 'Q'),
 168     DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 1, 0), 'R'),
 169     DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 1, 0), 'S'),
 170     DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 1, 0), 'T'),
 171     DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 1, 0), 'U'),
 172     DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 1, 0), 'V'),
 173     DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 1, 0), 'W'),
 174     DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 1, 0), 'X'),
 175     DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 1, 0), 'Y'),
 176     DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 1, 0), 'Z'),
 177
 178     DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 1, 0, 0), '0'),
 179     DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 0, 0, 0), '1'),
 180     DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 0, 0, 0), '2'),
 181     DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 0, 0, 0), '3'),
 182     DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 1, 0, 0), '4'),
 183     DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 1, 0, 0), '5'),
 184     DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 0, 0, 0), '6'),
 185     DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 1, 0, 0), '7'),
 186     DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 1, 0, 0), '8'),
 187     DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 0, 0, 0), '9'),
 188
 189     DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 1, 0, 0), '.'),
 190     DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 1, 0, 0), '+'),
 191     DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 1, 0, 0), '-'),
 192     DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 1, 0, 0), '*'),
 193     DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 0, 0, 0), '/'),
 194     DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 1, 0, 0), '('),
 195     DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 1, 0, 0), ')'),
 196
 197     DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 1, 0, 0), '&'),
 198     DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 1, 0, 0), '#'),
 199
 200     DO(BRLAPI_DOTS(0, 0, 0, 0, 0, 1, 0, 0), ','),
 201     DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 1, 0, 0), ';'),
 202     DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 1, 0, 0), ':'),
 203     DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 1, 0, 0), '!'),
 204     DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 1, 0, 0), '?'),
 205     DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 0, 0, 0), '"'),
 206     DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 0, 0, 0), '\''),
 207     DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 0, 0), '`'),
 208     DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 1, 0), '^'),
 209     DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 0, 0), '~'),
 210     DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 1, 0), '['),
 211     DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 1, 0), ']'),
 212     DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 0, 0), '{'),
 213     DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 0, 0), '}'),
 214     DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 1, 0, 0), '='),
 215     DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 1, 0, 0), '<'),
 216     DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 0, 0, 0), '>'),
 217     DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 1, 0, 0), '$'),
 218     DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 1, 0, 0), '%'),
 219     DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 1, 0), '@'),
 220     DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 0, 0), '|'),
 221     DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 1, 0), '\\'),
 222     DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 1, 0, 0), '_'),
 223 };
 224
 225 /* The guest OS has started discussing with us, finish initializing BrlAPI */
 226 static int baum_deferred_init(BaumDriverState *baum)
 227 {
 228     int tty = BRLAPI_TTY_DEFAULT;
 229     QemuConsole *con;
 230
 231     if (baum->deferred_init) {
 232         return 1;
 233     }
 234
 235     if (brlapi__getDisplaySize(baum->brlapi, &baum->x, &baum->y) == -1) {
 236         brlapi_perror("baum: brlapi__getDisplaySize");
 237         return 0;
 238     }
 239
 240     con = qemu_console_lookup_by_index(0);
 241     if (con && qemu_console_is_graphic(con)) {
 242         tty = qemu_console_get_window_id(con);
 243         if (tty == -1)
 244             tty = BRLAPI_TTY_DEFAULT;
 245     }
 246
 247     if (brlapi__enterTtyMode(baum->brlapi, tty, NULL) == -1) {
 248         brlapi_perror("baum: brlapi__enterTtyMode");
 249         return 0;
 250     }
 251     baum->deferred_init = 1;
 252     return 1;
 253 }
 254
 255 /* The serial port can receive more of our data */
 256 static void baum_accept_input(struct CharDriverState *chr)
 257 {
 258     BaumDriverState *baum = (BaumDriverState *)chr;
 259     int room, first;
 260
 261     if (!baum->out_buf_used)
 262         return;
 263     room = qemu_chr_be_can_write(chr);
 264     if (!room)
 265         return;
 266     if (room > baum->out_buf_used)
 267         room = baum->out_buf_used;
 268
 269     first = BUF_SIZE - baum->out_buf_ptr;
 270     if (room > first) {
 271         qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, first);
 272         baum->out_buf_ptr = 0;
 273         baum->out_buf_used -= first;
 274         room -= first;
 275     }
 276     qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, room);
 277     baum->out_buf_ptr += room;
 278     baum->out_buf_used -= room;
 279 }
 280
 281 /* We want to send a packet */
 282 static void baum_write_packet(BaumDriverState *baum, const uint8_t *buf, int len)
 283 {
 284     CharDriverState *chr = (CharDriverState *)baum;
 285     uint8_t io_buf[1 + 2 * len], *cur = io_buf;
 286     int room;
 287     *cur++ = ESC;
 288     while (len--)
 289         if ((*cur++ = *buf++) == ESC)
 290             *cur++ = ESC;
 291     room = qemu_chr_be_can_write(chr);
 292     len = cur - io_buf;
 293     if (len <= room) {
 294         /* Fits */
 295         qemu_chr_be_write(chr, io_buf, len);
 296     } else {
 297         int first;
 298         uint8_t out;
 299         /* Can't fit all, send what can be, and store the rest. */
 300         qemu_chr_be_write(chr, io_buf, room);
 301         len -= room;
 302         cur = io_buf + room;
 303         if (len > BUF_SIZE - baum->out_buf_used) {
 304             /* Can't even store it, drop the previous data... */
 305             assert(len <= BUF_SIZE);
 306             baum->out_buf_used = 0;
 307             baum->out_buf_ptr = 0;
 308         }
 309         out = baum->out_buf_ptr;
 310         baum->out_buf_used += len;
 311         first = BUF_SIZE - baum->out_buf_ptr;
 312         if (len > first) {
 313             memcpy(baum->out_buf + out, cur, first);
 314             out = 0;
 315             len -= first;
 316             cur += first;
 317         }
 318         memcpy(baum->out_buf + out, cur, len);
 319     }
 320 }
 321
 322 /* Called when the other end seems to have a wrong idea of our display size */
 323 static void baum_cellCount_timer_cb(void *opaque)
 324 {
 325     BaumDriverState *baum = opaque;
 326     uint8_t cell_count[] = { BAUM_RSP_CellCount, baum->x * baum->y };
 327     DPRINTF("Timeout waiting for DisplayData, sending cell count\n");
 328     baum_write_packet(baum, cell_count, sizeof(cell_count));
 329 }
 330
 331 /* Try to interpret a whole incoming packet */
 332 static int baum_eat_packet(BaumDriverState *baum, const uint8_t *buf, int len)
 333 {
 334     const uint8_t *cur = buf;
 335     uint8_t req = 0;
 336
 337     if (!len--)
 338         return 0;
 339     if (*cur++ != ESC) {
 340         while (*cur != ESC) {
 341             if (!len--)
 342                 return 0;
 343             cur++;
 344         }
 345         DPRINTF("Dropped %td bytes!\n", cur - buf);
 346     }
 347
 348 #define EAT(c) do {\
 349     if (!len--) \
 350         return 0; \
 351     if ((c = *cur++) == ESC) { \
 352         if (!len--) \
 353             return 0; \
 354         if (*cur++ != ESC) { \
 355             DPRINTF("Broken packet %#2x, tossing\n", req); \
 356             if (timer_pending(baum->cellCount_timer)) {    \
 357                 timer_del(baum->cellCount_timer);     \
 358                 baum_cellCount_timer_cb(baum);             \
 359             } \
 360             return (cur - 2 - buf); \
 361         } \
 362     } \
 363 } while (0)
 364
 365     EAT(req);
 366     switch (req) {
 367     case BAUM_REQ_DisplayData:
 368     {
 369         uint8_t cells[baum->x * baum->y], c;
 370         uint8_t text[baum->x * baum->y];
 371         uint8_t zero[baum->x * baum->y];
 372         int cursor = BRLAPI_CURSOR_OFF;
 373         int i;
 374
 375         /* Allow 100ms to complete the DisplayData packet */
 376         timer_mod(baum->cellCount_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
 377                        NANOSECONDS_PER_SECOND / 10);
 378         for (i = 0; i < baum->x * baum->y ; i++) {
 379             EAT(c);
 380             cells[i] = c;
 381             if ((c & (BRLAPI_DOT7|BRLAPI_DOT8))
 382                     == (BRLAPI_DOT7|BRLAPI_DOT8)) {
 383                 cursor = i + 1;
 384                 c &= ~(BRLAPI_DOT7|BRLAPI_DOT8);
 385             }
 386             c = nabcc_translation[DOTS2ASCII][c];
 387             if (!c) {
 388                 c = '?';
 389             }
 390             text[i] = c;
 391         }
 392         timer_del(baum->cellCount_timer);
 393
 394         memset(zero, 0, sizeof(zero));
 395
 396         brlapi_writeArguments_t wa = {
 397             .displayNumber = BRLAPI_DISPLAY_DEFAULT,
 398             .regionBegin = 1,
 399             .regionSize = baum->x * baum->y,
 400             .text = (char *)text,
 401             .textSize = baum->x * baum->y,
 402             .andMask = zero,
 403             .orMask = cells,
 404             .cursor = cursor,
 405             .charset = (char *)"ISO-8859-1",
 406         };
 407
 408         if (brlapi__write(baum->brlapi, &wa) == -1)
 409             brlapi_perror("baum brlapi_write");
 410         break;
 411     }
 412     case BAUM_REQ_SetMode:
 413     {
 414         uint8_t mode, setting;
 415         DPRINTF("SetMode\n");
 416         EAT(mode);
 417         EAT(setting);
 418         /* ignore */
 419         break;
 420     }
 421     case BAUM_REQ_SetProtocol:
 422     {
 423         uint8_t protocol;
 424         DPRINTF("SetProtocol\n");
 425         EAT(protocol);
 426         /* ignore */
 427         break;
 428     }
 429     case BAUM_REQ_GetDeviceIdentity:
 430     {
 431         uint8_t identity[17] = { BAUM_RSP_DeviceIdentity,
 432             'B','a','u','m',' ','V','a','r','i','o' };
 433         DPRINTF("GetDeviceIdentity\n");
 434         identity[11] = '0' + baum->x / 10;
 435         identity[12] = '0' + baum->x % 10;
 436         baum_write_packet(baum, identity, sizeof(identity));
 437         break;
 438     }
 439     case BAUM_REQ_GetVersionNumber:
 440     {
 441         uint8_t version[] = { BAUM_RSP_VersionNumber, 1 }; /* ? */
 442         DPRINTF("GetVersionNumber\n");
 443         baum_write_packet(baum, version, sizeof(version));
 444         break;
 445     }
 446     case BAUM_REQ_GetSerialNumber:
 447     {
 448         uint8_t serial[] = { BAUM_RSP_SerialNumber,
 449             '0','0','0','0','0','0','0','0' };
 450         DPRINTF("GetSerialNumber\n");
 451         baum_write_packet(baum, serial, sizeof(serial));
 452         break;
 453     }
 454     case BAUM_REQ_GetKeys:
 455     {
 456         DPRINTF("Get%0#2x\n", req);
 457         /* ignore */
 458         break;
 459     }
 460     default:
 461         DPRINTF("unrecognized request %0#2x\n", req);
 462         do
 463             if (!len--)
 464                 return 0;
 465         while (*cur++ != ESC);
 466         cur--;
 467         break;
 468     }
 469     return cur - buf;
 470 }
 471
 472 /* The other end is writing some data.  Store it and try to interpret */
 473 static int baum_write(CharDriverState *chr, const uint8_t *buf, int len)
 474 {
 475     BaumDriverState *baum = (BaumDriverState *)chr;
 476     int tocopy, cur, eaten, orig_len = len;
 477
 478     if (!len)
 479         return 0;
 480     if (!baum->brlapi)
 481         return len;
 482     if (!baum_deferred_init(baum))
 483         return len;
 484
 485     while (len) {
 486         /* Complete our buffer as much as possible */
 487         tocopy = len;
 488         if (tocopy > BUF_SIZE - baum->in_buf_used)
 489             tocopy = BUF_SIZE - baum->in_buf_used;
 490
 491         memcpy(baum->in_buf + baum->in_buf_used, buf, tocopy);
 492         baum->in_buf_used += tocopy;
 493         buf += tocopy;
 494         len -= tocopy;
 495
 496         /* Interpret it as much as possible */
 497         cur = 0;
 498         while (cur < baum->in_buf_used &&
 499                 (eaten = baum_eat_packet(baum, baum->in_buf + cur, baum->in_buf_used - cur)))
 500             cur += eaten;
 501
 502         /* Shift the remainder */
 503         if (cur) {
 504             memmove(baum->in_buf, baum->in_buf + cur, baum->in_buf_used - cur);
 505             baum->in_buf_used -= cur;
 506         }
 507
 508         /* And continue if any data left */
 509     }
 510     return orig_len;
 511 }
 512
 513 /* Send the key code to the other end */
 514 static void baum_send_key(BaumDriverState *baum, uint8_t type, uint8_t value) {
 515     uint8_t packet[] = { type, value };
 516     DPRINTF("writing key %x %x\n", type, value);
 517     baum_write_packet(baum, packet, sizeof(packet));
 518 }
 519
 520 static void baum_send_key2(BaumDriverState *baum, uint8_t type, uint8_t value,
 521                            uint8_t value2) {
 522     uint8_t packet[] = { type, value, value2 };
 523     DPRINTF("writing key %x %x\n", type, value);
 524     baum_write_packet(baum, packet, sizeof(packet));
 525 }
 526
 527 /* We got some data on the BrlAPI socket */
 528 static void baum_chr_read(void *opaque)
 529 {
 530     BaumDriverState *baum = opaque;
 531     brlapi_keyCode_t code;
 532     int ret;
 533     if (!baum->brlapi)
 534         return;
 535     if (!baum_deferred_init(baum))
 536         return;
 537     while ((ret = brlapi__readKey(baum->brlapi, 0, &code)) == 1) {
 538         DPRINTF("got key %"BRLAPI_PRIxKEYCODE"\n", code);
 539         /* Emulate */
 540         switch (code & BRLAPI_KEY_TYPE_MASK) {
 541         case BRLAPI_KEY_TYPE_CMD:
 542             switch (code & BRLAPI_KEY_CMD_BLK_MASK) {
 543             case BRLAPI_KEY_CMD_ROUTE:
 544                 baum_send_key(baum, BAUM_RSP_RoutingKey, (code & BRLAPI_KEY_CMD_ARG_MASK)+1);
 545                 baum_send_key(baum, BAUM_RSP_RoutingKey, 0);
 546                 break;
 547             case 0:
 548                 switch (code & BRLAPI_KEY_CMD_ARG_MASK) {
 549                 case BRLAPI_KEY_CMD_FWINLT:
 550                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2);
 551                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 552                     break;
 553                 case BRLAPI_KEY_CMD_FWINRT:
 554                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR2);
 555                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 556                     break;
 557                 case BRLAPI_KEY_CMD_LNUP:
 558                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR1);
 559                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 560                     break;
 561                 case BRLAPI_KEY_CMD_LNDN:
 562                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR3);
 563                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 564                     break;
 565                 case BRLAPI_KEY_CMD_TOP:
 566                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TR1);
 567                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 568                     break;
 569                 case BRLAPI_KEY_CMD_BOT:
 570                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL3|BAUM_TR3);
 571                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 572                     break;
 573                 case BRLAPI_KEY_CMD_TOP_LEFT:
 574                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1);
 575                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 576                     break;
 577                 case BRLAPI_KEY_CMD_BOT_LEFT:
 578                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR3);
 579                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 580                     break;
 581                 case BRLAPI_KEY_CMD_HOME:
 582                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1|BAUM_TR3);
 583                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 584                     break;
 585                 case BRLAPI_KEY_CMD_PREFMENU:
 586                     baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TL3|BAUM_TR1);
 587                     baum_send_key(baum, BAUM_RSP_TopKeys, 0);
 588                     break;
 589                 }
 590             }
 591             break;
 592         case BRLAPI_KEY_TYPE_SYM:
 593             {
 594                 brlapi_keyCode_t keysym = code & BRLAPI_KEY_CODE_MASK;
 595                 if (keysym < 0x100) {
 596                     uint8_t dots = nabcc_translation[ASCII2DOTS][keysym];
 597                     if (dots) {
 598                         baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, dots);
 599                         baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, 0);
 600                     }
 601                 }
 602                 break;
 603             }
 604         }
 605     }
 606     if (ret == -1 && (brlapi_errno != BRLAPI_ERROR_LIBCERR || errno != EINTR)) {
 607         brlapi_perror("baum: brlapi_readKey");
 608         brlapi__closeConnection(baum->brlapi);
 609         g_free(baum->brlapi);
 610         baum->brlapi = NULL;
 611     }
 612 }
 613
 614 static void baum_free(struct CharDriverState *chr)
 615 {
 616     BaumDriverState *baum = (BaumDriverState *)chr;
 617
 618     timer_free(baum->cellCount_timer);
 619     if (baum->brlapi) {
 620         brlapi__closeConnection(baum->brlapi);
 621         g_free(baum->brlapi);
 622     }
 623 }
 624
 625 static CharDriverState *chr_baum_init(const CharDriver *driver,
 626                                       const char *id,
 627                                       ChardevBackend *backend,
 628                                       ChardevReturn *ret,
 629                                       bool *be_opened,
 630                                       Error **errp)
 631 {
 632     ChardevCommon *common = backend->u.braille.data;
 633     BaumDriverState *baum;
 634     CharDriverState *chr;
 635     brlapi_handle_t *handle;
 636
 637     chr = qemu_chr_alloc(driver, common, errp);
 638     if (!chr) {
 639         return NULL;
 640     }
 641     baum = (BaumDriverState *)chr;
 642
 643     handle = g_malloc0(brlapi_getHandleSize());
 644     baum->brlapi = handle;
 645
 646     baum->brlapi_fd = brlapi__openConnection(handle, NULL, NULL);
 647     if (baum->brlapi_fd == -1) {
 648         error_setg(errp, "brlapi__openConnection: %s",
 649                    brlapi_strerror(brlapi_error_location()));
 650         goto fail_handle;
 651     }
 652     baum->deferred_init = 0;
 653
 654     baum->cellCount_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, baum_cellCount_timer_cb, baum);
 655
 656     qemu_set_fd_handler(baum->brlapi_fd, baum_chr_read, NULL, baum);
 657
 658     return chr;
 659
 660 fail_handle:
 661     g_free(handle);
 662     g_free(chr);
 663     return NULL;
 664 }
 665
 666 static void register_types(void)
 667 {
 668     static const CharDriver driver = {
 669         .instance_size = sizeof(BaumDriverState),
 670         .kind = CHARDEV_BACKEND_KIND_BRAILLE,
 671         .create = chr_baum_init,
 672         .chr_write = baum_write,
 673         .chr_accept_input = baum_accept_input,
 674         .chr_free = baum_free,
 675     };
 676
 677     register_char_driver(&driver);
 678 }
 679
 680 type_init(register_types);