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xemu/chardev/baum.c
Philippe Mathieu-Daudé d34977d682 chardev/baum: Avoid dynamic stack allocation 
Use autofree heap allocation instead of variable-length
array on the stack.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220819153931.3147384-4-peter.maydell@linaro.org
2022-09-22 16:38:28 +01:00

695 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 "chardev/char.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qemu/timer.h"
#include "hw/usb.h"
#include "ui/console.h"
#include <brlapi.h>
#include <brlapi_constants.h>
#include <brlapi_keycodes.h>
#include "qom/object.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
#define X_MAX 84
#define Y_MAX 1
struct BaumChardev {
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;
};
typedef struct BaumChardev BaumChardev;
#define TYPE_CHARDEV_BRAILLE "chardev-braille"
DECLARE_INSTANCE_CHECKER(BaumChardev, BAUM_CHARDEV,
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 > Y_MAX) {
baum->y = Y_MAX;
}
if (baum->x > X_MAX) {
baum->x = X_MAX;
}
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);
g_autofree uint8_t *io_buf = g_malloc(1 + 2 * len);
uint8_t *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[X_MAX * Y_MAX], c;
uint8_t text[X_MAX * Y_MAX];
uint8_t zero[X_MAX * Y_MAX];
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, baum->x * baum->y);
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,
};
module_obj(TYPE_CHARDEV_BRAILLE);
static void register_types(void)
{
type_register_static(&char_braille_type_info);
}
type_init(register_types);
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