321 lines
9.0 KiB
C
321 lines
9.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* originally written by: Kirk Reiser <kirk@braille.uwo.ca>
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* this version considerably modified by David Borowski, david575@rogers.com
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*
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* Copyright (C) 1998-99 Kirk Reiser.
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* Copyright (C) 2003 David Borowski.
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*
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* specificly written as a driver for the speakup screenreview
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* s not a general device driver.
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*/
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#include <linux/unistd.h>
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#include <linux/proc_fs.h>
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#include <linux/jiffies.h>
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/kthread.h>
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#include "speakup.h"
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#include "spk_priv.h"
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#define DRV_VERSION "2.20"
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#define SYNTH_CLEAR 0x03
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#define PROCSPEECH 0x0b
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static int xoff;
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static inline int synth_full(void)
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{
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return xoff;
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}
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static void do_catch_up(struct spk_synth *synth);
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static void synth_flush(struct spk_synth *synth);
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static void read_buff_add(u_char c);
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static unsigned char get_index(struct spk_synth *synth);
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static int in_escape;
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static int is_flushing;
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static DEFINE_SPINLOCK(flush_lock);
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static DECLARE_WAIT_QUEUE_HEAD(flush);
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static struct var_t vars[] = {
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{ CAPS_START, .u.s = {"[:dv ap 160] " } },
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{ CAPS_STOP, .u.s = {"[:dv ap 100 ] " } },
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{ RATE, .u.n = {"[:ra %d] ", 180, 75, 650, 0, 0, NULL } },
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{ INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } },
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{ VOL, .u.n = {"[:dv g5 %d] ", 86, 60, 86, 0, 0, NULL } },
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{ PUNCT, .u.n = {"[:pu %c] ", 0, 0, 2, 0, 0, "nsa" } },
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{ VOICE, .u.n = {"[:n%c] ", 0, 0, 9, 0, 0, "phfdburwkv" } },
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{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
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V_LAST_VAR
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};
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/*
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* These attributes will appear in /sys/accessibility/speakup/dectlk.
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*/
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static struct kobj_attribute caps_start_attribute =
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__ATTR(caps_start, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute caps_stop_attribute =
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__ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute pitch_attribute =
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__ATTR(pitch, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute inflection_attribute =
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__ATTR(inflection, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute punct_attribute =
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__ATTR(punct, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute rate_attribute =
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__ATTR(rate, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute voice_attribute =
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__ATTR(voice, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute vol_attribute =
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__ATTR(vol, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute delay_time_attribute =
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__ATTR(delay_time, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute direct_attribute =
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__ATTR(direct, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute full_time_attribute =
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__ATTR(full_time, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute flush_time_attribute =
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__ATTR(flush_time, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute jiffy_delta_attribute =
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__ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
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static struct kobj_attribute trigger_time_attribute =
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__ATTR(trigger_time, 0644, spk_var_show, spk_var_store);
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/*
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* Create a group of attributes so that we can create and destroy them all
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* at once.
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*/
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static struct attribute *synth_attrs[] = {
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&caps_start_attribute.attr,
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&caps_stop_attribute.attr,
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&pitch_attribute.attr,
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&inflection_attribute.attr,
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&punct_attribute.attr,
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&rate_attribute.attr,
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&voice_attribute.attr,
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&vol_attribute.attr,
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&delay_time_attribute.attr,
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&direct_attribute.attr,
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&full_time_attribute.attr,
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&flush_time_attribute.attr,
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&jiffy_delta_attribute.attr,
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&trigger_time_attribute.attr,
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NULL, /* need to NULL terminate the list of attributes */
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};
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static int ap_defaults[] = {122, 89, 155, 110, 208, 240, 200, 106, 306};
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static int g5_defaults[] = {86, 81, 86, 84, 81, 80, 83, 83, 73};
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static struct spk_synth synth_dectlk = {
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.name = "dectlk",
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.version = DRV_VERSION,
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.long_name = "Dectalk Express",
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.init = "[:error sp :name paul :rate 180 :tsr off] ",
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.procspeech = PROCSPEECH,
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.clear = SYNTH_CLEAR,
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.delay = 500,
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.trigger = 50,
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.jiffies = 50,
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.full = 40000,
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.flush_time = 4000,
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.dev_name = SYNTH_DEFAULT_DEV,
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.startup = SYNTH_START,
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.checkval = SYNTH_CHECK,
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.vars = vars,
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.default_pitch = ap_defaults,
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.default_vol = g5_defaults,
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.io_ops = &spk_ttyio_ops,
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.probe = spk_ttyio_synth_probe,
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.release = spk_ttyio_release,
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.synth_immediate = spk_ttyio_synth_immediate,
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.catch_up = do_catch_up,
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.flush = synth_flush,
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.is_alive = spk_synth_is_alive_restart,
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.synth_adjust = NULL,
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.read_buff_add = read_buff_add,
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.get_index = get_index,
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.indexing = {
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.command = "[:in re %d ] ",
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.lowindex = 1,
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.highindex = 8,
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.currindex = 1,
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},
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.attributes = {
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.attrs = synth_attrs,
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.name = "dectlk",
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},
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};
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static int is_indnum(u_char *ch)
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{
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if ((*ch >= '0') && (*ch <= '9')) {
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*ch = *ch - '0';
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return 1;
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}
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return 0;
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}
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static u_char lastind;
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static unsigned char get_index(struct spk_synth *synth)
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{
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u_char rv;
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rv = lastind;
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lastind = 0;
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return rv;
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}
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static void read_buff_add(u_char c)
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{
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static int ind = -1;
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if (c == 0x01) {
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unsigned long flags;
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spin_lock_irqsave(&flush_lock, flags);
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is_flushing = 0;
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wake_up_interruptible(&flush);
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spin_unlock_irqrestore(&flush_lock, flags);
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} else if (c == 0x13) {
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xoff = 1;
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} else if (c == 0x11) {
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xoff = 0;
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} else if (is_indnum(&c)) {
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if (ind == -1)
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ind = c;
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else
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ind = ind * 10 + c;
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} else if ((c > 31) && (c < 127)) {
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if (ind != -1)
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lastind = (u_char)ind;
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ind = -1;
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}
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}
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static void do_catch_up(struct spk_synth *synth)
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{
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int synth_full_val = 0;
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static u_char ch;
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static u_char last = '\0';
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unsigned long flags;
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unsigned long jiff_max;
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unsigned long timeout;
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DEFINE_WAIT(wait);
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struct var_t *jiffy_delta;
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struct var_t *delay_time;
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struct var_t *flush_time;
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int jiffy_delta_val;
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int delay_time_val;
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int timeout_val;
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jiffy_delta = spk_get_var(JIFFY);
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delay_time = spk_get_var(DELAY);
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flush_time = spk_get_var(FLUSH);
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spin_lock_irqsave(&speakup_info.spinlock, flags);
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jiffy_delta_val = jiffy_delta->u.n.value;
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timeout_val = flush_time->u.n.value;
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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timeout = msecs_to_jiffies(timeout_val);
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jiff_max = jiffies + jiffy_delta_val;
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while (!kthread_should_stop()) {
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/* if no ctl-a in 4, send data anyway */
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spin_lock_irqsave(&flush_lock, flags);
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while (is_flushing && timeout) {
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prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);
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spin_unlock_irqrestore(&flush_lock, flags);
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timeout = schedule_timeout(timeout);
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spin_lock_irqsave(&flush_lock, flags);
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}
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finish_wait(&flush, &wait);
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is_flushing = 0;
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spin_unlock_irqrestore(&flush_lock, flags);
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spin_lock_irqsave(&speakup_info.spinlock, flags);
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if (speakup_info.flushing) {
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speakup_info.flushing = 0;
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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synth->flush(synth);
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continue;
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}
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synth_buffer_skip_nonlatin1();
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if (synth_buffer_empty()) {
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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break;
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}
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ch = synth_buffer_peek();
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set_current_state(TASK_INTERRUPTIBLE);
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delay_time_val = delay_time->u.n.value;
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synth_full_val = synth_full();
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (ch == '\n')
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ch = 0x0D;
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if (synth_full_val || !synth->io_ops->synth_out(synth, ch)) {
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schedule_timeout(msecs_to_jiffies(delay_time_val));
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continue;
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}
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set_current_state(TASK_RUNNING);
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spin_lock_irqsave(&speakup_info.spinlock, flags);
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synth_buffer_getc();
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (ch == '[') {
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in_escape = 1;
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} else if (ch == ']') {
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in_escape = 0;
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} else if (ch <= SPACE) {
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if (!in_escape && strchr(",.!?;:", last))
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synth->io_ops->synth_out(synth, PROCSPEECH);
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if (time_after_eq(jiffies, jiff_max)) {
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if (!in_escape)
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synth->io_ops->synth_out(synth,
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PROCSPEECH);
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spin_lock_irqsave(&speakup_info.spinlock,
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flags);
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jiffy_delta_val = jiffy_delta->u.n.value;
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delay_time_val = delay_time->u.n.value;
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spin_unlock_irqrestore(&speakup_info.spinlock,
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flags);
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schedule_timeout(msecs_to_jiffies
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(delay_time_val));
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jiff_max = jiffies + jiffy_delta_val;
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}
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}
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last = ch;
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}
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if (!in_escape)
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synth->io_ops->synth_out(synth, PROCSPEECH);
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}
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static void synth_flush(struct spk_synth *synth)
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{
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if (in_escape)
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/* if in command output ']' so we don't get an error */
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synth->io_ops->synth_out(synth, ']');
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in_escape = 0;
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is_flushing = 1;
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synth->io_ops->flush_buffer(synth);
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synth->io_ops->synth_out(synth, SYNTH_CLEAR);
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}
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module_param_named(ser, synth_dectlk.ser, int, 0444);
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module_param_named(dev, synth_dectlk.dev_name, charp, 0444);
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module_param_named(start, synth_dectlk.startup, short, 0444);
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MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
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MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
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MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
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module_spk_synth(synth_dectlk);
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MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
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MODULE_AUTHOR("David Borowski");
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MODULE_DESCRIPTION("Speakup support for DECtalk Express synthesizers");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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