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// SPDX-License-Identifier: GPL-2.0+
/*
* originally written by: Kirk Reiser <kirk@braille.uwo.ca>
* this version considerably modified by David Borowski, david575@rogers.com
*
* Copyright (C) 1998-99 Kirk Reiser.
* Copyright (C) 2003 David Borowski.
*
* specificly written as a driver for the speakup screenreview
* s not a general device driver.
*/
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/kthread.h>
#include "spk_priv.h"
#include "speakup.h"
#define DRV_VERSION "2.14"
#define SYNTH_CLEAR 0x03
#define PROCSPEECH 0x0b
static volatile unsigned char last_char;
static void read_buff_add(u_char ch)
{
last_char = ch;
}
static inline bool synth_full(void)
{
return last_char == 0x13;
}
static void do_catch_up(struct spk_synth *synth);
static void synth_flush(struct spk_synth *synth);
static int in_escape;
static struct var_t vars[] = {
{ CAPS_START, .u.s = {"[:dv ap 222]" } },
{ CAPS_STOP, .u.s = {"[:dv ap 100]" } },
{ RATE, .u.n = {"[:ra %d]", 7, 0, 9, 150, 25, NULL } },
{ PITCH, .u.n = {"[:dv ap %d]", 100, 0, 100, 0, 0, NULL } },
{ INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } },
{ VOL, .u.n = {"[:dv gv %d]", 13, 0, 16, 0, 5, NULL } },
{ PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" } },
{ VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" } },
{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
V_LAST_VAR
};
/*
* These attributes will appear in /sys/accessibility/speakup/decext.
*/
static struct kobj_attribute caps_start_attribute =
__ATTR(caps_start, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute caps_stop_attribute =
__ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute pitch_attribute =
__ATTR(pitch, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute inflection_attribute =
__ATTR(inflection, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute punct_attribute =
__ATTR(punct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute rate_attribute =
__ATTR(rate, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute voice_attribute =
__ATTR(voice, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute vol_attribute =
__ATTR(vol, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute delay_time_attribute =
__ATTR(delay_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute direct_attribute =
__ATTR(direct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute full_time_attribute =
__ATTR(full_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute jiffy_delta_attribute =
__ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute trigger_time_attribute =
__ATTR(trigger_time, 0644, spk_var_show, spk_var_store);
/*
* Create a group of attributes so that we can create and destroy them all
* at once.
*/
static struct attribute *synth_attrs[] = {
&caps_start_attribute.attr,
&caps_stop_attribute.attr,
&pitch_attribute.attr,
&inflection_attribute.attr,
&punct_attribute.attr,
&rate_attribute.attr,
&voice_attribute.attr,
&vol_attribute.attr,
&delay_time_attribute.attr,
&direct_attribute.attr,
&full_time_attribute.attr,
&jiffy_delta_attribute.attr,
&trigger_time_attribute.attr,
NULL, /* need to NULL terminate the list of attributes */
};
static struct spk_synth synth_decext = {
.name = "decext",
.version = DRV_VERSION,
.long_name = "Dectalk External",
.init = "[:pe -380]",
.procspeech = PROCSPEECH,
.clear = SYNTH_CLEAR,
.delay = 500,
.trigger = 50,
.jiffies = 50,
.full = 40000,
.flags = SF_DEC,
.dev_name = SYNTH_DEFAULT_DEV,
.startup = SYNTH_START,
.checkval = SYNTH_CHECK,
.vars = vars,
.io_ops = &spk_ttyio_ops,
.probe = spk_ttyio_synth_probe,
.release = spk_ttyio_release,
.synth_immediate = spk_ttyio_synth_immediate,
.catch_up = do_catch_up,
.flush = synth_flush,
.is_alive = spk_synth_is_alive_restart,
.synth_adjust = NULL,
.read_buff_add = read_buff_add,
.get_index = NULL,
.indexing = {
.command = NULL,
.lowindex = 0,
.highindex = 0,
.currindex = 0,
},
.attributes = {
.attrs = synth_attrs,
.name = "decext",
},
};
static void do_catch_up(struct spk_synth *synth)
{
u_char ch;
static u_char last = '\0';
unsigned long flags;
unsigned long jiff_max;
struct var_t *jiffy_delta;
struct var_t *delay_time;
int jiffy_delta_val = 0;
int delay_time_val = 0;
jiffy_delta = spk_get_var(JIFFY);
delay_time = spk_get_var(DELAY);
spin_lock_irqsave(&speakup_info.spinlock, flags);
jiffy_delta_val = jiffy_delta->u.n.value;
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
jiff_max = jiffies + jiffy_delta_val;
while (!kthread_should_stop()) {
spin_lock_irqsave(&speakup_info.spinlock, flags);
if (speakup_info.flushing) {
speakup_info.flushing = 0;
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
synth->flush(synth);
continue;
}
synth_buffer_skip_nonlatin1();
if (synth_buffer_empty()) {
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
break;
}
ch = synth_buffer_peek();
set_current_state(TASK_INTERRUPTIBLE);
delay_time_val = delay_time->u.n.value;
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
if (ch == '\n')
ch = 0x0D;
if (synth_full() || !synth->io_ops->synth_out(synth, ch)) {
schedule_timeout(msecs_to_jiffies(delay_time_val));
continue;
}
set_current_state(TASK_RUNNING);
spin_lock_irqsave(&speakup_info.spinlock, flags);
synth_buffer_getc();
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
if (ch == '[') {
in_escape = 1;
} else if (ch == ']') {
in_escape = 0;
} else if (ch <= SPACE) {
if (!in_escape && strchr(",.!?;:", last))
synth->io_ops->synth_out(synth, PROCSPEECH);
if (time_after_eq(jiffies, jiff_max)) {
if (!in_escape)
synth->io_ops->synth_out(synth,
PROCSPEECH);
spin_lock_irqsave(&speakup_info.spinlock,
flags);
jiffy_delta_val = jiffy_delta->u.n.value;
delay_time_val = delay_time->u.n.value;
spin_unlock_irqrestore(&speakup_info.spinlock,
flags);
schedule_timeout(msecs_to_jiffies
(delay_time_val));
jiff_max = jiffies + jiffy_delta_val;
}
}
last = ch;
}
if (!in_escape)
synth->io_ops->synth_out(synth, PROCSPEECH);
}
static void synth_flush(struct spk_synth *synth)
{
in_escape = 0;
synth->io_ops->flush_buffer();
synth->synth_immediate(synth, "\033P;10z\033\\");
}
module_param_named(ser, synth_decext.ser, int, 0444);
module_param_named(dev, synth_decext.dev_name, charp, 0444);
module_param_named(start, synth_decext.startup, short, 0444);
MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
module_spk_synth(synth_decext);
MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
MODULE_AUTHOR("David Borowski");
MODULE_DESCRIPTION("Speakup support for DECtalk External synthesizers");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
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