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qemu/chardev/baum.c
Samuel Thibault 1ef7c96ee2 baum: Truncate braille device size to 84x1 
Baum device bigger than 84 do not actually exist, but the user's own
Braille device might be wider than 84 columns.  Some guest drivers
would be upset by such sizes, so clamp the device size.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-Id: <20171211001950.27843-1-samuel.thibault@ens-lyon.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21 09:22:44 +01:00

684 lines
22 KiB
C
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/*
* QEMU Baum Braille Device
*
* Copyright (c) 2008, 2010-2011, 2016-2017 Samuel Thibault
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "chardev/char.h"
#include "qemu/timer.h"
#include "hw/usb.h"
#include "ui/console.h"
#include <brlapi.h>
#include <brlapi_constants.h>
#include <brlapi_keycodes.h>
#if 0
#define DPRINTF(fmt, ...) \
printf(fmt, ## __VA_ARGS__)
#else
#define DPRINTF(fmt, ...)
#endif
#define ESC 0x1B
#define BAUM_REQ_DisplayData 0x01
#define BAUM_REQ_GetVersionNumber 0x05
#define BAUM_REQ_GetKeys 0x08
#define BAUM_REQ_SetMode 0x12
#define BAUM_REQ_SetProtocol 0x15
#define BAUM_REQ_GetDeviceIdentity 0x84
#define BAUM_REQ_GetSerialNumber 0x8A
#define BAUM_RSP_CellCount 0x01
#define BAUM_RSP_VersionNumber 0x05
#define BAUM_RSP_ModeSetting 0x11
#define BAUM_RSP_CommunicationChannel 0x16
#define BAUM_RSP_PowerdownSignal 0x17
#define BAUM_RSP_HorizontalSensors 0x20
#define BAUM_RSP_VerticalSensors 0x21
#define BAUM_RSP_RoutingKeys 0x22
#define BAUM_RSP_Switches 0x23
#define BAUM_RSP_TopKeys 0x24
#define BAUM_RSP_HorizontalSensor 0x25
#define BAUM_RSP_VerticalSensor 0x26
#define BAUM_RSP_RoutingKey 0x27
#define BAUM_RSP_FrontKeys6 0x28
#define BAUM_RSP_BackKeys6 0x29
#define BAUM_RSP_CommandKeys 0x2B
#define BAUM_RSP_FrontKeys10 0x2C
#define BAUM_RSP_BackKeys10 0x2D
#define BAUM_RSP_EntryKeys 0x33
#define BAUM_RSP_JoyStick 0x34
#define BAUM_RSP_ErrorCode 0x40
#define BAUM_RSP_InfoBlock 0x42
#define BAUM_RSP_DeviceIdentity 0x84
#define BAUM_RSP_SerialNumber 0x8A
#define BAUM_RSP_BluetoothName 0x8C
#define BAUM_TL1 0x01
#define BAUM_TL2 0x02
#define BAUM_TL3 0x04
#define BAUM_TR1 0x08
#define BAUM_TR2 0x10
#define BAUM_TR3 0x20
#define BUF_SIZE 256
typedef struct {
Chardev parent;
brlapi_handle_t *brlapi;
int brlapi_fd;
unsigned int x, y;
bool deferred_init;
uint8_t in_buf[BUF_SIZE];
uint8_t in_buf_used;
uint8_t out_buf[BUF_SIZE];
uint8_t out_buf_used, out_buf_ptr;
QEMUTimer *cellCount_timer;
} BaumChardev;
#define TYPE_CHARDEV_BRAILLE "chardev-braille"
#define BAUM_CHARDEV(obj) OBJECT_CHECK(BaumChardev, (obj), TYPE_CHARDEV_BRAILLE)
/* Let's assume NABCC by default */
enum way {
DOTS2ASCII,
ASCII2DOTS
};
static const uint8_t nabcc_translation[2][256] = {
#ifndef BRLAPI_DOTS
#define BRLAPI_DOTS(d1,d2,d3,d4,d5,d6,d7,d8) \
((d1?BRLAPI_DOT1:0)|\
(d2?BRLAPI_DOT2:0)|\
(d3?BRLAPI_DOT3:0)|\
(d4?BRLAPI_DOT4:0)|\
(d5?BRLAPI_DOT5:0)|\
(d6?BRLAPI_DOT6:0)|\
(d7?BRLAPI_DOT7:0)|\
(d8?BRLAPI_DOT8:0))
#endif
#define DO(dots, ascii) \
[DOTS2ASCII][dots] = ascii, \
[ASCII2DOTS][ascii] = dots
DO(0, ' '),
DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 0, 0), 'a'),
DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 0, 0), 'b'),
DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 0, 0), 'c'),
DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 0, 0), 'd'),
DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 0, 0), 'e'),
DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 0, 0), 'f'),
DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 0, 0), 'g'),
DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 0, 0), 'h'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 0, 0), 'i'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 0, 0), 'j'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 0, 0), 'k'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 0, 0), 'l'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 0, 0), 'm'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 0, 0), 'n'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 0, 0), 'o'),
DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 0, 0), 'p'),
DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 0, 0), 'q'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 0, 0), 'r'),
DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 0, 0), 's'),
DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 0, 0), 't'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 0, 0), 'u'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 0, 0), 'v'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 0, 0), 'w'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 0, 0), 'x'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 0, 0), 'y'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 0, 0), 'z'),
DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 1, 0), 'A'),
DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 1, 0), 'B'),
DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 1, 0), 'C'),
DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 1, 0), 'D'),
DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 1, 0), 'E'),
DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 1, 0), 'F'),
DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 1, 0), 'G'),
DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 1, 0), 'H'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 1, 0), 'I'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 1, 0), 'J'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 1, 0), 'K'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 1, 0), 'L'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 1, 0), 'M'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 1, 0), 'N'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 1, 0), 'O'),
DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 1, 0), 'P'),
DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 1, 0), 'Q'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 1, 0), 'R'),
DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 1, 0), 'S'),
DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 1, 0), 'T'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 1, 0), 'U'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 1, 0), 'V'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 1, 0), 'W'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 1, 0), 'X'),
DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 1, 0), 'Y'),
DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 1, 0), 'Z'),
DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 1, 0, 0), '0'),
DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 0, 0, 0), '1'),
DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 0, 0, 0), '2'),
DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 0, 0, 0), '3'),
DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 1, 0, 0), '4'),
DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 1, 0, 0), '5'),
DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 0, 0, 0), '6'),
DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 1, 0, 0), '7'),
DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 1, 0, 0), '8'),
DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 0, 0, 0), '9'),
DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 1, 0, 0), '.'),
DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 1, 0, 0), '+'),
DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 1, 0, 0), '-'),
DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 1, 0, 0), '*'),
DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 0, 0, 0), '/'),
DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 1, 0, 0), '('),
DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 1, 0, 0), ')'),
DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 1, 0, 0), '&'),
DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 1, 0, 0), '#'),
DO(BRLAPI_DOTS(0, 0, 0, 0, 0, 1, 0, 0), ','),
DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 1, 0, 0), ';'),
DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 1, 0, 0), ':'),
DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 1, 0, 0), '!'),
DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 1, 0, 0), '?'),
DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 0, 0, 0), '"'),
DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 0, 0, 0), '\''),
DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 0, 0), '`'),
DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 1, 0), '^'),
DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 0, 0), '~'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 1, 0), '['),
DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 1, 0), ']'),
DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 0, 0), '{'),
DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 0, 0), '}'),
DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 1, 0, 0), '='),
DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 1, 0, 0), '<'),
DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 0, 0, 0), '>'),
DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 1, 0, 0), '$'),
DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 1, 0, 0), '%'),
DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 1, 0), '@'),
DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 0, 0), '|'),
DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 1, 0), '\\'),
DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 1, 0, 0), '_'),
};
/* The guest OS has started discussing with us, finish initializing BrlAPI */
static int baum_deferred_init(BaumChardev *baum)
{
int tty = BRLAPI_TTY_DEFAULT;
QemuConsole *con;
if (baum->deferred_init) {
return 1;
}
if (brlapi__getDisplaySize(baum->brlapi, &baum->x, &baum->y) == -1) {
brlapi_perror("baum: brlapi__getDisplaySize");
return 0;
}
if (baum->y > 1) {
baum->y = 1;
}
if (baum->x > 84) {
baum->x = 84;
}
con = qemu_console_lookup_by_index(0);
if (con && qemu_console_is_graphic(con)) {
tty = qemu_console_get_window_id(con);
if (tty == -1)
tty = BRLAPI_TTY_DEFAULT;
}
if (brlapi__enterTtyMode(baum->brlapi, tty, NULL) == -1) {
brlapi_perror("baum: brlapi__enterTtyMode");
return 0;
}
baum->deferred_init = 1;
return 1;
}
/* The serial port can receive more of our data */
static void baum_chr_accept_input(struct Chardev *chr)
{
BaumChardev *baum = BAUM_CHARDEV(chr);
int room, first;
if (!baum->out_buf_used)
return;
room = qemu_chr_be_can_write(chr);
if (!room)
return;
if (room > baum->out_buf_used)
room = baum->out_buf_used;
first = BUF_SIZE - baum->out_buf_ptr;
if (room > first) {
qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, first);
baum->out_buf_ptr = 0;
baum->out_buf_used -= first;
room -= first;
}
qemu_chr_be_write(chr, baum->out_buf + baum->out_buf_ptr, room);
baum->out_buf_ptr += room;
baum->out_buf_used -= room;
}
/* We want to send a packet */
static void baum_write_packet(BaumChardev *baum, const uint8_t *buf, int len)
{
Chardev *chr = CHARDEV(baum);
uint8_t io_buf[1 + 2 * len], *cur = io_buf;
int room;
*cur++ = ESC;
while (len--)
if ((*cur++ = *buf++) == ESC)
*cur++ = ESC;
room = qemu_chr_be_can_write(chr);
len = cur - io_buf;
if (len <= room) {
/* Fits */
qemu_chr_be_write(chr, io_buf, len);
} else {
int first;
uint8_t out;
/* Can't fit all, send what can be, and store the rest. */
qemu_chr_be_write(chr, io_buf, room);
len -= room;
cur = io_buf + room;
if (len > BUF_SIZE - baum->out_buf_used) {
/* Can't even store it, drop the previous data... */
assert(len <= BUF_SIZE);
baum->out_buf_used = 0;
baum->out_buf_ptr = 0;
}
out = baum->out_buf_ptr;
baum->out_buf_used += len;
first = BUF_SIZE - baum->out_buf_ptr;
if (len > first) {
memcpy(baum->out_buf + out, cur, first);
out = 0;
len -= first;
cur += first;
}
memcpy(baum->out_buf + out, cur, len);
}
}
/* Called when the other end seems to have a wrong idea of our display size */
static void baum_cellCount_timer_cb(void *opaque)
{
BaumChardev *baum = BAUM_CHARDEV(opaque);
uint8_t cell_count[] = { BAUM_RSP_CellCount, baum->x * baum->y };
DPRINTF("Timeout waiting for DisplayData, sending cell count\n");
baum_write_packet(baum, cell_count, sizeof(cell_count));
}
/* Try to interpret a whole incoming packet */
static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)
{
const uint8_t *cur = buf;
uint8_t req = 0;
if (!len--)
return 0;
if (*cur++ != ESC) {
while (*cur != ESC) {
if (!len--)
return 0;
cur++;
}
DPRINTF("Dropped %td bytes!\n", cur - buf);
}
#define EAT(c) do {\
if (!len--) \
return 0; \
if ((c = *cur++) == ESC) { \
if (!len--) \
return 0; \
if (*cur++ != ESC) { \
DPRINTF("Broken packet %#2x, tossing\n", req); \
if (timer_pending(baum->cellCount_timer)) { \
timer_del(baum->cellCount_timer); \
baum_cellCount_timer_cb(baum); \
} \
return (cur - 2 - buf); \
} \
} \
} while (0)
EAT(req);
switch (req) {
case BAUM_REQ_DisplayData:
{
uint8_t cells[baum->x * baum->y], c;
uint8_t text[baum->x * baum->y];
uint8_t zero[baum->x * baum->y];
int cursor = BRLAPI_CURSOR_OFF;
int i;
/* Allow 100ms to complete the DisplayData packet */
timer_mod(baum->cellCount_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
NANOSECONDS_PER_SECOND / 10);
for (i = 0; i < baum->x * baum->y ; i++) {
EAT(c);
cells[i] = c;
if ((c & (BRLAPI_DOT7|BRLAPI_DOT8))
== (BRLAPI_DOT7|BRLAPI_DOT8)) {
cursor = i + 1;
c &= ~(BRLAPI_DOT7|BRLAPI_DOT8);
}
c = nabcc_translation[DOTS2ASCII][c];
if (!c) {
c = '?';
}
text[i] = c;
}
timer_del(baum->cellCount_timer);
memset(zero, 0, sizeof(zero));
brlapi_writeArguments_t wa = {
.displayNumber = BRLAPI_DISPLAY_DEFAULT,
.regionBegin = 1,
.regionSize = baum->x * baum->y,
.text = (char *)text,
.textSize = baum->x * baum->y,
.andMask = zero,
.orMask = cells,
.cursor = cursor,
.charset = (char *)"ISO-8859-1",
};
if (brlapi__write(baum->brlapi, &wa) == -1)
brlapi_perror("baum brlapi_write");
break;
}
case BAUM_REQ_SetMode:
{
uint8_t mode, setting;
DPRINTF("SetMode\n");
EAT(mode);
EAT(setting);
/* ignore */
break;
}
case BAUM_REQ_SetProtocol:
{
uint8_t protocol;
DPRINTF("SetProtocol\n");
EAT(protocol);
/* ignore */
break;
}
case BAUM_REQ_GetDeviceIdentity:
{
uint8_t identity[17] = { BAUM_RSP_DeviceIdentity,
'B','a','u','m',' ','V','a','r','i','o' };
DPRINTF("GetDeviceIdentity\n");
identity[11] = '0' + baum->x / 10;
identity[12] = '0' + baum->x % 10;
baum_write_packet(baum, identity, sizeof(identity));
break;
}
case BAUM_REQ_GetVersionNumber:
{
uint8_t version[] = { BAUM_RSP_VersionNumber, 1 }; /* ? */
DPRINTF("GetVersionNumber\n");
baum_write_packet(baum, version, sizeof(version));
break;
}
case BAUM_REQ_GetSerialNumber:
{
uint8_t serial[] = { BAUM_RSP_SerialNumber,
'0','0','0','0','0','0','0','0' };
DPRINTF("GetSerialNumber\n");
baum_write_packet(baum, serial, sizeof(serial));
break;
}
case BAUM_REQ_GetKeys:
{
DPRINTF("Get%0#2x\n", req);
/* ignore */
break;
}
default:
DPRINTF("unrecognized request %0#2x\n", req);
do
if (!len--)
return 0;
while (*cur++ != ESC);
cur--;
break;
}
return cur - buf;
}
/* The other end is writing some data. Store it and try to interpret */
static int baum_chr_write(Chardev *chr, const uint8_t *buf, int len)
{
BaumChardev *baum = BAUM_CHARDEV(chr);
int tocopy, cur, eaten, orig_len = len;
if (!len)
return 0;
if (!baum->brlapi)
return len;
if (!baum_deferred_init(baum))
return len;
while (len) {
/* Complete our buffer as much as possible */
tocopy = len;
if (tocopy > BUF_SIZE - baum->in_buf_used)
tocopy = BUF_SIZE - baum->in_buf_used;
memcpy(baum->in_buf + baum->in_buf_used, buf, tocopy);
baum->in_buf_used += tocopy;
buf += tocopy;
len -= tocopy;
/* Interpret it as much as possible */
cur = 0;
while (cur < baum->in_buf_used &&
(eaten = baum_eat_packet(baum, baum->in_buf + cur, baum->in_buf_used - cur)))
cur += eaten;
/* Shift the remainder */
if (cur) {
memmove(baum->in_buf, baum->in_buf + cur, baum->in_buf_used - cur);
baum->in_buf_used -= cur;
}
/* And continue if any data left */
}
return orig_len;
}
/* Send the key code to the other end */
static void baum_send_key(BaumChardev *baum, uint8_t type, uint8_t value)
{
uint8_t packet[] = { type, value };
DPRINTF("writing key %x %x\n", type, value);
baum_write_packet(baum, packet, sizeof(packet));
}
static void baum_send_key2(BaumChardev *baum, uint8_t type, uint8_t value,
uint8_t value2)
{
uint8_t packet[] = { type, value, value2 };
DPRINTF("writing key %x %x\n", type, value);
baum_write_packet(baum, packet, sizeof(packet));
}
/* We got some data on the BrlAPI socket */
static void baum_chr_read(void *opaque)
{
BaumChardev *baum = BAUM_CHARDEV(opaque);
brlapi_keyCode_t code;
int ret;
if (!baum->brlapi)
return;
if (!baum_deferred_init(baum))
return;
while ((ret = brlapi__readKey(baum->brlapi, 0, &code)) == 1) {
DPRINTF("got key %"BRLAPI_PRIxKEYCODE"\n", code);
/* Emulate */
switch (code & BRLAPI_KEY_TYPE_MASK) {
case BRLAPI_KEY_TYPE_CMD:
switch (code & BRLAPI_KEY_CMD_BLK_MASK) {
case BRLAPI_KEY_CMD_ROUTE:
baum_send_key(baum, BAUM_RSP_RoutingKey, (code & BRLAPI_KEY_CMD_ARG_MASK)+1);
baum_send_key(baum, BAUM_RSP_RoutingKey, 0);
break;
case 0:
switch (code & BRLAPI_KEY_CMD_ARG_MASK) {
case BRLAPI_KEY_CMD_FWINLT:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_FWINRT:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR2);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_LNUP:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR1);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_LNDN:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TR3);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_TOP:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TR1);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_BOT:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL3|BAUM_TR3);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_TOP_LEFT:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_BOT_LEFT:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR3);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_HOME:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL2|BAUM_TR1|BAUM_TR3);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
case BRLAPI_KEY_CMD_PREFMENU:
baum_send_key(baum, BAUM_RSP_TopKeys, BAUM_TL1|BAUM_TL3|BAUM_TR1);
baum_send_key(baum, BAUM_RSP_TopKeys, 0);
break;
}
}
break;
case BRLAPI_KEY_TYPE_SYM:
{
brlapi_keyCode_t keysym = code & BRLAPI_KEY_CODE_MASK;
if (keysym < 0x100) {
uint8_t dots = nabcc_translation[ASCII2DOTS][keysym];
if (dots) {
baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, dots);
baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, 0);
}
}
break;
}
}
}
if (ret == -1 && (brlapi_errno != BRLAPI_ERROR_LIBCERR || errno != EINTR)) {
brlapi_perror("baum: brlapi_readKey");
brlapi__closeConnection(baum->brlapi);
g_free(baum->brlapi);
baum->brlapi = NULL;
}
}
static void char_braille_finalize(Object *obj)
{
BaumChardev *baum = BAUM_CHARDEV(obj);
timer_free(baum->cellCount_timer);
if (baum->brlapi) {
brlapi__closeConnection(baum->brlapi);
g_free(baum->brlapi);
}
}
static void baum_chr_open(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
BaumChardev *baum = BAUM_CHARDEV(chr);
brlapi_handle_t *handle;
handle = g_malloc0(brlapi_getHandleSize());
baum->brlapi = handle;
baum->brlapi_fd = brlapi__openConnection(handle, NULL, NULL);
if (baum->brlapi_fd == -1) {
error_setg(errp, "brlapi__openConnection: %s",
brlapi_strerror(brlapi_error_location()));
g_free(handle);
baum->brlapi = NULL;
return;
}
baum->deferred_init = 0;
baum->cellCount_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, baum_cellCount_timer_cb, baum);
qemu_set_fd_handler(baum->brlapi_fd, baum_chr_read, NULL, baum);
}
static void char_braille_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->open = baum_chr_open;
cc->chr_write = baum_chr_write;
cc->chr_accept_input = baum_chr_accept_input;
}
static const TypeInfo char_braille_type_info = {
.name = TYPE_CHARDEV_BRAILLE,
.parent = TYPE_CHARDEV,
.instance_size = sizeof(BaumChardev),
.instance_finalize = char_braille_finalize,
.class_init = char_braille_class_init,
};
static void register_types(void)
{
type_register_static(&char_braille_type_info);
}
type_init(register_types);
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