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alistair23-linux
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Input: allow using several chords for braille 

For coping with bad keyboards, permit to type a braille pattern by
pressing several chords. By default, only one chord is needed.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
hifive-unleashed-5.1
Samuel Thibault 2006-04-26 00:14:10 -04:00 committed by Dmitry Torokhov
parent 1a0ccece05
commit 77426d7210
1 changed files with 28 additions and 10 deletions
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38
drivers/char/keyboard.c
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@ -860,9 +860,32 @@ static void k_slock(struct vc_data *vc, unsigned char value, char up_flag, struc
}
/* by default, 300ms interval for combination release */
static long brl_timeout = 300;
MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for combination on first release, < 0 for dead characters)");
module_param(brl_timeout, long, 0644);
static unsigned brl_timeout = 300;
MODULE_PARM_DESC(brl_timeout, "Braille keys release delay in ms (0 for commit on first key release)");
module_param(brl_timeout, uint, 0644);
static unsigned brl_nbchords = 1;
MODULE_PARM_DESC(brl_nbchords, "Number of chords that produce a braille pattern (0 for dead chords)");
module_param(brl_nbchords, uint, 0644);
static void k_brlcommit(struct vc_data *vc, unsigned int pattern, char up_flag, struct pt_regs *regs)
{
static unsigned long chords;
static unsigned committed;
if (!brl_nbchords)
k_deadunicode(vc, BRL_UC_ROW | pattern, up_flag, regs);
else {
committed |= pattern;
chords++;
if (chords == brl_nbchords) {
k_unicode(vc, BRL_UC_ROW | committed, up_flag, regs);
chords = 0;
committed = 0;
}
}
}
static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct pt_regs *regs)
{
static unsigned pressed,committing;
@ -882,11 +905,6 @@ static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct
if (value > 8)
return;
if (brl_timeout < 0) {
k_deadunicode(vc, BRL_UC_ROW | (1 << (value - 1)), up_flag, regs);
return;
}
if (up_flag) {
if (brl_timeout) {
if (!committing ||
@ -897,13 +915,13 @@ static void k_brl(struct vc_data *vc, unsigned char value, char up_flag, struct
pressed &= ~(1 << (value - 1));
if (!pressed) {
if (committing) {
k_unicode(vc, BRL_UC_ROW | committing, 0, regs);
k_brlcommit(vc, committing, 0, regs);
committing = 0;
}
}
} else {
if (committing) {
k_unicode(vc, BRL_UC_ROW | committing, 0, regs);
k_brlcommit(vc, committing, 0, regs);
committing = 0;
}
pressed &= ~(1 << (value - 1));