linux-user: Add support for a group of btrfs ioctls used for snapshots
[qemu.git] / chardev / baum.c
1 /*
2 * QEMU Baum Braille Device
3 *
4 * Copyright (c) 2008, 2010-2011, 2016-2017 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
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "chardev/char.h"
28 #include "qemu/main-loop.h"
29 #include "qemu/module.h"
30 #include "qemu/timer.h"
31 #include "hw/usb.h"
32 #include "ui/console.h"
33 #include <brlapi.h>
34 #include <brlapi_constants.h>
35 #include <brlapi_keycodes.h>
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 Chardev parent;
91
92 brlapi_handle_t *brlapi;
93 int brlapi_fd;
94 unsigned int x, y;
95 bool deferred_init;
96
97 uint8_t in_buf[BUF_SIZE];
98 uint8_t in_buf_used;
99 uint8_t out_buf[BUF_SIZE];
100 uint8_t out_buf_used, out_buf_ptr;
101
102 QEMUTimer *cellCount_timer;
103 } BaumChardev;
104
105 #define TYPE_CHARDEV_BRAILLE "chardev-braille"
106 #define BAUM_CHARDEV(obj) OBJECT_CHECK(BaumChardev, (obj), TYPE_CHARDEV_BRAILLE)
107
108 /* Let's assume NABCC by default */
109 enum way {
110 DOTS2ASCII,
111 ASCII2DOTS
112 };
113 static const uint8_t nabcc_translation[2][256] = {
114 #ifndef BRLAPI_DOTS
115 #define BRLAPI_DOTS(d1,d2,d3,d4,d5,d6,d7,d8) \
116 ((d1?BRLAPI_DOT1:0)|\
117 (d2?BRLAPI_DOT2:0)|\
118 (d3?BRLAPI_DOT3:0)|\
119 (d4?BRLAPI_DOT4:0)|\
120 (d5?BRLAPI_DOT5:0)|\
121 (d6?BRLAPI_DOT6:0)|\
122 (d7?BRLAPI_DOT7:0)|\
123 (d8?BRLAPI_DOT8:0))
124 #endif
125 #define DO(dots, ascii) \
126 [DOTS2ASCII][dots] = ascii, \
127 [ASCII2DOTS][ascii] = dots
128 DO(0, ' '),
129 DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 0, 0), 'a'),
130 DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 0, 0), 'b'),
131 DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 0, 0), 'c'),
132 DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 0, 0), 'd'),
133 DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 0, 0), 'e'),
134 DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 0, 0), 'f'),
135 DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 0, 0), 'g'),
136 DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 0, 0), 'h'),
137 DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 0, 0), 'i'),
138 DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 0, 0), 'j'),
139 DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 0, 0), 'k'),
140 DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 0, 0), 'l'),
141 DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 0, 0), 'm'),
142 DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 0, 0), 'n'),
143 DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 0, 0), 'o'),
144 DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 0, 0), 'p'),
145 DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 0, 0), 'q'),
146 DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 0, 0), 'r'),
147 DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 0, 0), 's'),
148 DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 0, 0), 't'),
149 DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 0, 0), 'u'),
150 DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 0, 0), 'v'),
151 DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 0, 0), 'w'),
152 DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 0, 0), 'x'),
153 DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 0, 0), 'y'),
154 DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 0, 0), 'z'),
155
156 DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 1, 0), 'A'),
157 DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 1, 0), 'B'),
158 DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 1, 0), 'C'),
159 DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 1, 0), 'D'),
160 DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 1, 0), 'E'),
161 DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 1, 0), 'F'),
162 DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 1, 0), 'G'),
163 DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 1, 0), 'H'),
164 DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 1, 0), 'I'),
165 DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 1, 0), 'J'),
166 DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 1, 0), 'K'),
167 DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 1, 0), 'L'),
168 DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 1, 0), 'M'),
169 DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 1, 0), 'N'),
170 DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 1, 0), 'O'),
171 DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 1, 0), 'P'),
172 DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 1, 0), 'Q'),
173 DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 1, 0), 'R'),
174 DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 1, 0), 'S'),
175 DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 1, 0), 'T'),
176 DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 1, 0), 'U'),
177 DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 1, 0), 'V'),
178 DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 1, 0), 'W'),
179 DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 1, 0), 'X'),
180 DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 1, 0), 'Y'),
181 DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 1, 0), 'Z'),
182
183 DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 1, 0, 0), '0'),
184 DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 0, 0, 0), '1'),
185 DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 0, 0, 0), '2'),
186 DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 0, 0, 0), '3'),
187 DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 1, 0, 0), '4'),
188 DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 1, 0, 0), '5'),
189 DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 0, 0, 0), '6'),
190 DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 1, 0, 0), '7'),
191 DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 1, 0, 0), '8'),
192 DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 0, 0, 0), '9'),
193
194 DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 1, 0, 0), '.'),
195 DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 1, 0, 0), '+'),
196 DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 1, 0, 0), '-'),
197 DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 1, 0, 0), '*'),
198 DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 0, 0, 0), '/'),
199 DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 1, 0, 0), '('),
200 DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 1, 0, 0), ')'),
201
202 DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 1, 0, 0), '&'),
203 DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 1, 0, 0), '#'),
204
205 DO(BRLAPI_DOTS(0, 0, 0, 0, 0, 1, 0, 0), ','),
206 DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 1, 0, 0), ';'),
207 DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 1, 0, 0), ':'),
208 DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 1, 0, 0), '!'),
209 DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 1, 0, 0), '?'),
210 DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 0, 0, 0), '"'),
211 DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 0, 0, 0), '\''),
212 DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 0, 0), '`'),
213 DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 1, 0), '^'),
214 DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 0, 0), '~'),
215 DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 1, 0), '['),
216 DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 1, 0), ']'),
217 DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 0, 0), '{'),
218 DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 0, 0), '}'),
219 DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 1, 0, 0), '='),
220 DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 1, 0, 0), '<'),
221 DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 0, 0, 0), '>'),
222 DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 1, 0, 0), '$'),
223 DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 1, 0, 0), '%'),
224 DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 1, 0), '@'),
225 DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 0, 0), '|'),
226 DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 1, 0), '\\'),
227 DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 1, 0, 0), '_'),
228 };
229
230 /* The guest OS has started discussing with us, finish initializing BrlAPI */
231 static int baum_deferred_init(BaumChardev *baum)
232 {
233 int tty = BRLAPI_TTY_DEFAULT;
234 QemuConsole *con;
235
236 if (baum->deferred_init) {
237 return 1;
238 }
239
240 if (brlapi__getDisplaySize(baum->brlapi, &baum->x, &baum->y) == -1) {
241 brlapi_perror("baum: brlapi__getDisplaySize");
242 return 0;
243 }
244 if (baum->y > 1) {
245 baum->y = 1;
246 }
247 if (baum->x > 84) {
248 baum->x = 84;
249 }
250
251 con = qemu_console_lookup_by_index(0);
252 if (con && qemu_console_is_graphic(con)) {
253 tty = qemu_console_get_window_id(con);
254 if (tty == -1)
255 tty = BRLAPI_TTY_DEFAULT;
256 }
257
258 if (brlapi__enterTtyMode(baum->brlapi, tty, NULL) == -1) {
259 brlapi_perror("baum: brlapi__enterTtyMode");
260 return 0;
261 }
262 baum->deferred_init = 1;
263 return 1;
264 }
265
266 /* The serial port can receive more of our data */
267 static void baum_chr_accept_input(struct Chardev *chr)
268 {
269 BaumChardev *baum = BAUM_CHARDEV(chr);
270 int room, first;
271
272 if (!baum->out_buf_used)
273 return;
274 room = qemu_chr_be_can_write(chr);
275 if (!room)
276 return;
277 if (room > baum->out_buf_used)
278 room = baum->out_buf_used;
279
280 first = BUF_SIZE - baum->out_buf_ptr;
281 if (room > first) {
282 qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, first);
283 baum->out_buf_ptr = 0;
284 baum->out_buf_used -= first;
285 room -= first;
286 }
287 qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, room);
288 baum->out_buf_ptr += room;
289 baum->out_buf_used -= room;
290 }
291
292 /* We want to send a packet */
293 static void baum_write_packet(BaumChardev *baum, const uint8_t *buf, int len)
294 {
295 Chardev *chr = CHARDEV(baum);
296 uint8_t io_buf[1 + 2 * len], *cur = io_buf;
297 int room;
298 *cur++ = ESC;
299 while (len--)
300 if ((*cur++ = *buf++) == ESC)
301 *cur++ = ESC;
302 room = qemu_chr_be_can_write(chr);
303 len = cur - io_buf;
304 if (len <= room) {
305 /* Fits */
306 qemu_chr_be_write(chr, io_buf, len);
307 } else {
308 int first;
309 uint8_t out;
310 /* Can't fit all, send what can be, and store the rest. */
311 qemu_chr_be_write(chr, io_buf, room);
312 len -= room;
313 cur = io_buf + room;
314 if (len > BUF_SIZE - baum->out_buf_used) {
315 /* Can't even store it, drop the previous data... */
316 assert(len <= BUF_SIZE);
317 baum->out_buf_used = 0;
318 baum->out_buf_ptr = 0;
319 }
320 out = baum->out_buf_ptr;
321 baum->out_buf_used += len;
322 first = BUF_SIZE - baum->out_buf_ptr;
323 if (len > first) {
324 memcpy(baum->out_buf + out, cur, first);
325 out = 0;
326 len -= first;
327 cur += first;
328 }
329 memcpy(baum->out_buf + out, cur, len);
330 }
331 }
332
333 /* Called when the other end seems to have a wrong idea of our display size */
334 static void baum_cellCount_timer_cb(void *opaque)
335 {
336 BaumChardev *baum = BAUM_CHARDEV(opaque);
337 uint8_t cell_count[] = { BAUM_RSP_CellCount, baum->x * baum->y };
338 DPRINTF("Timeout waiting for DisplayData, sending cell count\n");
339 baum_write_packet(baum, cell_count, sizeof(cell_count));
340 }
341
342 /* Try to interpret a whole incoming packet */
343 static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)
344 {
345 const uint8_t *cur = buf;
346 uint8_t req = 0;
347
348 if (!len--)
349 return 0;
350 if (*cur++ != ESC) {
351 while (*cur != ESC) {
352 if (!len--)
353 return 0;
354 cur++;
355 }
356 DPRINTF("Dropped %td bytes!\n", cur - buf);
357 }
358
359 #define EAT(c) do {\
360 if (!len--) \
361 return 0; \
362 if ((c = *cur++) == ESC) { \
363 if (!len--) \
364 return 0; \
365 if (*cur++ != ESC) { \
366 DPRINTF("Broken packet %#2x, tossing\n", req); \
367 if (timer_pending(baum->cellCount_timer)) { \
368 timer_del(baum->cellCount_timer); \
369 baum_cellCount_timer_cb(baum); \
370 } \
371 return (cur - 2 - buf); \
372 } \
373 } \
374 } while (0)
375
376 EAT(req);
377 switch (req) {
378 case BAUM_REQ_DisplayData:
379 {
380 uint8_t cells[baum->x * baum->y], c;
381 uint8_t text[baum->x * baum->y];
382 uint8_t zero[baum->x * baum->y];
383 int cursor = BRLAPI_CURSOR_OFF;
384 int i;
385
386 /* Allow 100ms to complete the DisplayData packet */
387 timer_mod(baum->cellCount_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
388 NANOSECONDS_PER_SECOND / 10);
389 for (i = 0; i < baum->x * baum->y ; i++) {
390 EAT(c);
391 cells[i] = c;
392 if ((c & (BRLAPI_DOT7|BRLAPI_DOT8))
393 == (BRLAPI_DOT7|BRLAPI_DOT8)) {
394 cursor = i + 1;
395 c &= ~(BRLAPI_DOT7|BRLAPI_DOT8);
396 }
397 c = nabcc_translation[DOTS2ASCII][c];
398 if (!c) {
399 c = '?';
400 }
401 text[i] = c;
402 }
403 timer_del(baum->cellCount_timer);
404
405 memset(zero, 0, sizeof(zero));
406
407 brlapi_writeArguments_t wa = {
408 .displayNumber = BRLAPI_DISPLAY_DEFAULT,
409 .regionBegin = 1,
410 .regionSize = baum->x * baum->y,
411 .text = (char *)text,
412 .textSize = baum->x * baum->y,
413 .andMask = zero,
414 .orMask = cells,
415 .cursor = cursor,
416 .charset = (char *)"ISO-8859-1",
417 };
418
419 if (brlapi__write(baum->brlapi, &wa) == -1)
420 brlapi_perror("baum brlapi_write");
421 break;
422 }
423 case BAUM_REQ_SetMode:
424 {
425 uint8_t mode, setting;
426 DPRINTF("SetMode\n");
427 EAT(mode);
428 EAT(setting);
429 /* ignore */
430 break;
431 }
432 case BAUM_REQ_SetProtocol:
433 {
434 uint8_t protocol;
435 DPRINTF("SetProtocol\n");
436 EAT(protocol);
437 /* ignore */
438 break;
439 }
440 case BAUM_REQ_GetDeviceIdentity:
441 {
442 uint8_t identity[17] = { BAUM_RSP_DeviceIdentity,
443 'B','a','u','m',' ','V','a','r','i','o' };
444 DPRINTF("GetDeviceIdentity\n");
445 identity[11] = '0' + baum->x / 10;
446 identity[12] = '0' + baum->x % 10;
447 baum_write_packet(baum, identity, sizeof(identity));
448 break;
449 }
450 case BAUM_REQ_GetVersionNumber:
451 {
452 uint8_t version[] = { BAUM_RSP_VersionNumber, 1 }; /* ? */
453 DPRINTF("GetVersionNumber\n");
454 baum_write_packet(baum, version, sizeof(version));
455 break;
456 }
457 case BAUM_REQ_GetSerialNumber:
458 {
459 uint8_t serial[] = { BAUM_RSP_SerialNumber,
460 '0','0','0','0','0','0','0','0' };
461 DPRINTF("GetSerialNumber\n");
462 baum_write_packet(baum, serial, sizeof(serial));
463 break;
464 }
465 case BAUM_REQ_GetKeys:
466 {
467 DPRINTF("Get%0#2x\n", req);
468 /* ignore */
469 break;
470 }
471 default:
472 DPRINTF("unrecognized request %0#2x\n", req);
473 do
474 if (!len--)
475 return 0;
476 while (*cur++ != ESC);
477 cur--;
478 break;
479 }
480 return cur - buf;
481 }
482
483 /* The other end is writing some data. Store it and try to interpret */
484 static int baum_chr_write(Chardev *chr, const uint8_t *buf, int len)
485 {
486 BaumChardev *baum = BAUM_CHARDEV(chr);
487 int tocopy, cur, eaten, orig_len = len;
488
489 if (!len)
490 return 0;
491 if (!baum->brlapi)
492 return len;
493 if (!baum_deferred_init(baum))
494 return len;
495
496 while (len) {
497 /* Complete our buffer as much as possible */
498 tocopy = len;
499 if (tocopy > BUF_SIZE - baum->in_buf_used)
500 tocopy = BUF_SIZE - baum->in_buf_used;
501
502 memcpy(baum->in_buf + baum->in_buf_used, buf, tocopy);
503 baum->in_buf_used += tocopy;
504 buf += tocopy;
505 len -= tocopy;
506
507 /* Interpret it as much as possible */
508 cur = 0;
509 while (cur < baum->in_buf_used &&
510 (eaten = baum_eat_packet(baum, baum->in_buf + cur, baum->in_buf_used - cur)))
511 cur += eaten;
512
513 /* Shift the remainder */
514 if (cur) {
515 memmove(baum->in_buf, baum->in_buf + cur, baum->in_buf_used - cur);
516 baum->in_buf_used -= cur;
517 }
518
519 /* And continue if any data left */
520 }
521 return orig_len;
522 }
523
524 /* Send the key code to the other end */
525 static void baum_send_key(BaumChardev *baum, uint8_t type, uint8_t value)
526 {
527 uint8_t packet[] = { type, value };
528 DPRINTF("writing key %x %x\n", type, value);
529 baum_write_packet(baum, packet, sizeof(packet));
530 }
531
532 static void baum_send_key2(BaumChardev *baum, uint8_t type, uint8_t value,
533 uint8_t value2)
534 {
535 uint8_t packet[] = { type, value, value2 };
536 DPRINTF("writing key %x %x\n", type, value);
537 baum_write_packet(baum, packet, sizeof(packet));
538 }
539
540 /* We got some data on the BrlAPI socket */
541 static void baum_chr_read(void *opaque)
542 {
543 BaumChardev *baum = BAUM_CHARDEV(opaque);
544 brlapi_keyCode_t code;
545 int ret;
546 if (!baum->brlapi)
547 return;
548 if (!baum_deferred_init(baum))
549 return;
550 while ((ret = brlapi__readKey(baum->brlapi, 0, &code)) == 1) {
551 DPRINTF("got key %"BRLAPI_PRIxKEYCODE"\n", code);
552 /* Emulate */
553 switch (code & BRLAPI_KEY_TYPE_MASK) {
554 case BRLAPI_KEY_TYPE_CMD:
555 switch (code & BRLAPI_KEY_CMD_BLK_MASK) {
556 case BRLAPI_KEY_CMD_ROUTE:
557 baum_send_key(baum, BAUM_RSP_RoutingKey, (code & BRLAPI_KEY_CMD_ARG_MASK)+1);
558 baum_send_key(baum, BAUM_RSP_RoutingKey, 0);
559 break;
560 case 0:
561 switch (code & BRLAPI_KEY_CMD_ARG_MASK) {
562 case BRLAPI_KEY_CMD_FWINLT:
563 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2);
564 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
565 break;
566 case BRLAPI_KEY_CMD_FWINRT:
567 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR2);
568 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
569 break;
570 case BRLAPI_KEY_CMD_LNUP:
571 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR1);
572 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
573 break;
574 case BRLAPI_KEY_CMD_LNDN:
575 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR3);
576 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
577 break;
578 case BRLAPI_KEY_CMD_TOP:
579 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TR1);
580 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
581 break;
582 case BRLAPI_KEY_CMD_BOT:
583 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL3|BAUM_TR3);
584 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
585 break;
586 case BRLAPI_KEY_CMD_TOP_LEFT:
587 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1);
588 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
589 break;
590 case BRLAPI_KEY_CMD_BOT_LEFT:
591 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR3);
592 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
593 break;
594 case BRLAPI_KEY_CMD_HOME:
595 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1|BAUM_TR3);
596 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
597 break;
598 case BRLAPI_KEY_CMD_PREFMENU:
599 baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TL3|BAUM_TR1);
600 baum_send_key(baum, BAUM_RSP_TopKeys, 0);
601 break;
602 }
603 }
604 break;
605 case BRLAPI_KEY_TYPE_SYM:
606 {
607 brlapi_keyCode_t keysym = code & BRLAPI_KEY_CODE_MASK;
608 if (keysym < 0x100) {
609 uint8_t dots = nabcc_translation[ASCII2DOTS][keysym];
610 if (dots) {
611 baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, dots);
612 baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, 0);
613 }
614 }
615 break;
616 }
617 }
618 }
619 if (ret == -1 && (brlapi_errno != BRLAPI_ERROR_LIBCERR || errno != EINTR)) {
620 brlapi_perror("baum: brlapi_readKey");
621 brlapi__closeConnection(baum->brlapi);
622 g_free(baum->brlapi);
623 baum->brlapi = NULL;
624 }
625 }
626
627 static void char_braille_finalize(Object *obj)
628 {
629 BaumChardev *baum = BAUM_CHARDEV(obj);
630
631 timer_free(baum->cellCount_timer);
632 if (baum->brlapi) {
633 brlapi__closeConnection(baum->brlapi);
634 g_free(baum->brlapi);
635 }
636 }
637
638 static void baum_chr_open(Chardev *chr,
639 ChardevBackend *backend,
640 bool *be_opened,
641 Error **errp)
642 {
643 BaumChardev *baum = BAUM_CHARDEV(chr);
644 brlapi_handle_t *handle;
645
646 handle = g_malloc0(brlapi_getHandleSize());
647 baum->brlapi = handle;
648
649 baum->brlapi_fd = brlapi__openConnection(handle, NULL, NULL);
650 if (baum->brlapi_fd == -1) {
651 error_setg(errp, "brlapi__openConnection: %s",
652 brlapi_strerror(brlapi_error_location()));
653 g_free(handle);
654 baum->brlapi = NULL;
655 return;
656 }
657 baum->deferred_init = 0;
658
659 baum->cellCount_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, baum_cellCount_timer_cb, baum);
660
661 qemu_set_fd_handler(baum->brlapi_fd, baum_chr_read, NULL, baum);
662 }
663
664 static void char_braille_class_init(ObjectClass *oc, void *data)
665 {
666 ChardevClass *cc = CHARDEV_CLASS(oc);
667
668 cc->open = baum_chr_open;
669 cc->chr_write = baum_chr_write;
670 cc->chr_accept_input = baum_chr_accept_input;
671 }
672
673 static const TypeInfo char_braille_type_info = {
674 .name = TYPE_CHARDEV_BRAILLE,
675 .parent = TYPE_CHARDEV,
676 .instance_size = sizeof(BaumChardev),
677 .instance_finalize = char_braille_finalize,
678 .class_init = char_braille_class_init,
679 };
680
681 static void register_types(void)
682 {
683 type_register_static(&char_braille_type_info);
684 }
685
686 type_init(register_types);