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9583e4ee49
Users needing it with the dectlk synth report that a 100ms flush delay is still noticeable and prefer to set it to e.g. 10ms. This leaves the default to 4000ms (since hitting it is a sign that the cable is faulty and should be replaced), but allows to set it as short as 10ms. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Link: https://lore.kernel.org/r/20220205232957.bc6o6yyt5hitg754@begin Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
494 lines
12 KiB
C
494 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/ctype.h> /* for isdigit() and friends */
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#include <linux/fs.h>
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#include <linux/mm.h> /* for verify_area */
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#include <linux/errno.h> /* for -EBUSY */
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#include <linux/ioport.h> /* for check_region, request_region */
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#include <linux/interrupt.h>
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#include <linux/delay.h> /* for loops_per_sec */
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#include <linux/kmod.h>
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#include <linux/jiffies.h>
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#include <linux/uaccess.h> /* for copy_from_user */
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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 "spk_priv.h"
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#include "speakup.h"
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#include "serialio.h"
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static LIST_HEAD(synths);
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struct spk_synth *synth;
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char spk_pitch_buff[32] = "";
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static int module_status;
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bool spk_quiet_boot;
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struct speakup_info_t speakup_info = {
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/*
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* This spinlock is used to protect the entire speakup machinery, and
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* must be taken at each kernel->speakup transition and released at
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* each corresponding speakup->kernel transition.
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*
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* The progression thread only interferes with the speakup machinery
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* through the synth buffer, so only needs to take the lock
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* while tinkering with the buffer.
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*
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* We use spin_lock/trylock_irqsave and spin_unlock_irqrestore with this
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* spinlock because speakup needs to disable the keyboard IRQ.
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*/
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.spinlock = __SPIN_LOCK_UNLOCKED(speakup_info.spinlock),
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.flushing = 0,
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};
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EXPORT_SYMBOL_GPL(speakup_info);
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static int do_synth_init(struct spk_synth *in_synth);
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/*
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* Main loop of the progression thread: keep eating from the buffer
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* and push to the serial port, waiting as needed
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*
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* For devices that have a "full" notification mechanism, the driver can
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* adapt the loop the way they prefer.
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*/
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static void _spk_do_catch_up(struct spk_synth *synth, int unicode)
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{
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u16 ch;
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unsigned long flags;
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unsigned long jiff_max;
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struct var_t *delay_time;
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struct var_t *full_time;
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struct var_t *jiffy_delta;
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int jiffy_delta_val;
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int delay_time_val;
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int full_time_val;
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int ret;
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jiffy_delta = spk_get_var(JIFFY);
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full_time = spk_get_var(FULL);
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delay_time = spk_get_var(DELAY);
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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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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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jiff_max = jiffies + jiffy_delta_val;
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while (!kthread_should_stop()) {
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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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if (!unicode)
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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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full_time_val = full_time->u.n.value;
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (ch == '\n')
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ch = synth->procspeech;
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if (unicode)
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ret = synth->io_ops->synth_out_unicode(synth, ch);
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else
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ret = synth->io_ops->synth_out(synth, ch);
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if (!ret) {
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schedule_timeout(msecs_to_jiffies(full_time_val));
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continue;
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}
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if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
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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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delay_time_val = delay_time->u.n.value;
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full_time_val = full_time->u.n.value;
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (synth->io_ops->synth_out(synth, synth->procspeech))
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schedule_timeout(
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msecs_to_jiffies(delay_time_val));
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else
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schedule_timeout(
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msecs_to_jiffies(full_time_val));
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jiff_max = jiffies + jiffy_delta_val;
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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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}
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synth->io_ops->synth_out(synth, synth->procspeech);
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}
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void spk_do_catch_up(struct spk_synth *synth)
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{
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_spk_do_catch_up(synth, 0);
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}
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EXPORT_SYMBOL_GPL(spk_do_catch_up);
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void spk_do_catch_up_unicode(struct spk_synth *synth)
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{
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_spk_do_catch_up(synth, 1);
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}
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EXPORT_SYMBOL_GPL(spk_do_catch_up_unicode);
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void spk_synth_flush(struct spk_synth *synth)
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{
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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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EXPORT_SYMBOL_GPL(spk_synth_flush);
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unsigned char spk_synth_get_index(struct spk_synth *synth)
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{
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return synth->io_ops->synth_in_nowait(synth);
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}
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EXPORT_SYMBOL_GPL(spk_synth_get_index);
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int spk_synth_is_alive_nop(struct spk_synth *synth)
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{
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synth->alive = 1;
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return 1;
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}
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EXPORT_SYMBOL_GPL(spk_synth_is_alive_nop);
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int spk_synth_is_alive_restart(struct spk_synth *synth)
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{
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if (synth->alive)
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return 1;
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if (synth->io_ops->wait_for_xmitr(synth) > 0) {
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/* restart */
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synth->alive = 1;
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synth_printf("%s", synth->init);
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return 2; /* reenabled */
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}
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pr_warn("%s: can't restart synth\n", synth->long_name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(spk_synth_is_alive_restart);
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static void thread_wake_up(struct timer_list *unused)
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{
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wake_up_interruptible_all(&speakup_event);
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}
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static DEFINE_TIMER(thread_timer, thread_wake_up);
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void synth_start(void)
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{
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struct var_t *trigger_time;
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if (!synth->alive) {
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synth_buffer_clear();
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return;
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}
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trigger_time = spk_get_var(TRIGGER);
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if (!timer_pending(&thread_timer))
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mod_timer(&thread_timer, jiffies +
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msecs_to_jiffies(trigger_time->u.n.value));
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}
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void spk_do_flush(void)
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{
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if (!synth)
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return;
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speakup_info.flushing = 1;
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synth_buffer_clear();
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if (synth->alive) {
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if (spk_pitch_shift) {
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synth_printf("%s", spk_pitch_buff);
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spk_pitch_shift = 0;
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}
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}
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wake_up_interruptible_all(&speakup_event);
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wake_up_process(speakup_task);
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}
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void synth_write(const char *buf, size_t count)
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{
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while (count--)
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synth_buffer_add(*buf++);
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synth_start();
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}
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void synth_printf(const char *fmt, ...)
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{
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va_list args;
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unsigned char buf[160], *p;
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int r;
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va_start(args, fmt);
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r = vsnprintf(buf, sizeof(buf), fmt, args);
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va_end(args);
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if (r > sizeof(buf) - 1)
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r = sizeof(buf) - 1;
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p = buf;
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while (r--)
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synth_buffer_add(*p++);
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synth_start();
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}
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EXPORT_SYMBOL_GPL(synth_printf);
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void synth_putwc(u16 wc)
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{
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synth_buffer_add(wc);
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}
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EXPORT_SYMBOL_GPL(synth_putwc);
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void synth_putwc_s(u16 wc)
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{
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synth_buffer_add(wc);
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synth_start();
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}
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EXPORT_SYMBOL_GPL(synth_putwc_s);
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void synth_putws(const u16 *buf)
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{
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const u16 *p;
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for (p = buf; *p; p++)
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synth_buffer_add(*p);
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}
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EXPORT_SYMBOL_GPL(synth_putws);
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void synth_putws_s(const u16 *buf)
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{
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synth_putws(buf);
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synth_start();
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}
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EXPORT_SYMBOL_GPL(synth_putws_s);
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static int index_count;
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static int sentence_count;
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void spk_reset_index_count(int sc)
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{
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static int first = 1;
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if (first)
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first = 0;
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else
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synth->get_index(synth);
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index_count = 0;
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sentence_count = sc;
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}
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int synth_supports_indexing(void)
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{
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if (synth->get_index)
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return 1;
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return 0;
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}
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void synth_insert_next_index(int sent_num)
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{
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int out;
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if (synth->alive) {
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if (sent_num == 0) {
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synth->indexing.currindex++;
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index_count++;
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if (synth->indexing.currindex >
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synth->indexing.highindex)
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synth->indexing.currindex =
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synth->indexing.lowindex;
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}
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out = synth->indexing.currindex * 10 + sent_num;
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synth_printf(synth->indexing.command, out, out);
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}
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}
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void spk_get_index_count(int *linecount, int *sentcount)
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{
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int ind = synth->get_index(synth);
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if (ind) {
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sentence_count = ind % 10;
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if ((ind / 10) <= synth->indexing.currindex)
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index_count = synth->indexing.currindex - (ind / 10);
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else
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index_count = synth->indexing.currindex
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- synth->indexing.lowindex
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+ synth->indexing.highindex - (ind / 10) + 1;
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}
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*sentcount = sentence_count;
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*linecount = index_count;
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}
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static struct resource synth_res;
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int synth_request_region(unsigned long start, unsigned long n)
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{
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struct resource *parent = &ioport_resource;
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memset(&synth_res, 0, sizeof(synth_res));
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synth_res.name = synth->name;
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synth_res.start = start;
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synth_res.end = start + n - 1;
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synth_res.flags = IORESOURCE_BUSY;
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return request_resource(parent, &synth_res);
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}
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EXPORT_SYMBOL_GPL(synth_request_region);
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int synth_release_region(unsigned long start, unsigned long n)
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{
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return release_resource(&synth_res);
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}
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EXPORT_SYMBOL_GPL(synth_release_region);
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struct var_t synth_time_vars[] = {
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{ DELAY, .u.n = {NULL, 100, 100, 2000, 0, 0, NULL } },
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{ TRIGGER, .u.n = {NULL, 20, 10, 2000, 0, 0, NULL } },
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{ JIFFY, .u.n = {NULL, 50, 20, 200, 0, 0, NULL } },
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{ FULL, .u.n = {NULL, 400, 200, 60000, 0, 0, NULL } },
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{ FLUSH, .u.n = {NULL, 4000, 10, 4000, 0, 0, NULL } },
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V_LAST_VAR
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};
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/* called by: speakup_init() */
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int synth_init(char *synth_name)
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{
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int ret = 0;
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struct spk_synth *tmp, *synth = NULL;
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if (!synth_name)
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return 0;
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if (strcmp(synth_name, "none") == 0) {
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mutex_lock(&spk_mutex);
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synth_release();
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mutex_unlock(&spk_mutex);
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return 0;
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}
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mutex_lock(&spk_mutex);
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/* First, check if we already have it loaded. */
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list_for_each_entry(tmp, &synths, node) {
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if (strcmp(tmp->name, synth_name) == 0)
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synth = tmp;
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}
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/* If we got one, initialize it now. */
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if (synth)
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ret = do_synth_init(synth);
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else
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ret = -ENODEV;
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mutex_unlock(&spk_mutex);
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return ret;
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}
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/* called by: synth_add() */
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static int do_synth_init(struct spk_synth *in_synth)
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{
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struct var_t *var;
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synth_release();
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if (in_synth->checkval != SYNTH_CHECK)
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return -EINVAL;
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synth = in_synth;
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synth->alive = 0;
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pr_warn("synth probe\n");
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if (synth->probe(synth) < 0) {
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pr_warn("%s: device probe failed\n", in_synth->name);
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synth = NULL;
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return -ENODEV;
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}
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synth_time_vars[0].u.n.value =
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synth_time_vars[0].u.n.default_val = synth->delay;
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synth_time_vars[1].u.n.value =
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synth_time_vars[1].u.n.default_val = synth->trigger;
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synth_time_vars[2].u.n.value =
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synth_time_vars[2].u.n.default_val = synth->jiffies;
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synth_time_vars[3].u.n.value =
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synth_time_vars[3].u.n.default_val = synth->full;
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synth_time_vars[4].u.n.value =
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synth_time_vars[4].u.n.default_val = synth->flush_time;
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synth_printf("%s", synth->init);
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for (var = synth->vars;
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(var->var_id >= 0) && (var->var_id < MAXVARS); var++)
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speakup_register_var(var);
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if (!spk_quiet_boot)
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synth_printf("%s found\n", synth->long_name);
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if (synth->attributes.name &&
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sysfs_create_group(speakup_kobj, &synth->attributes) < 0)
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return -ENOMEM;
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synth_flags = synth->flags;
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wake_up_interruptible_all(&speakup_event);
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if (speakup_task)
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wake_up_process(speakup_task);
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return 0;
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}
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void synth_release(void)
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{
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struct var_t *var;
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unsigned long flags;
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if (!synth)
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return;
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spin_lock_irqsave(&speakup_info.spinlock, flags);
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pr_info("releasing synth %s\n", synth->name);
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synth->alive = 0;
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del_timer(&thread_timer);
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (synth->attributes.name)
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sysfs_remove_group(speakup_kobj, &synth->attributes);
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for (var = synth->vars; var->var_id != MAXVARS; var++)
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speakup_unregister_var(var->var_id);
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synth->release(synth);
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synth = NULL;
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}
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/* called by: all_driver_init() */
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int synth_add(struct spk_synth *in_synth)
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{
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int status = 0;
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struct spk_synth *tmp;
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mutex_lock(&spk_mutex);
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list_for_each_entry(tmp, &synths, node) {
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if (tmp == in_synth) {
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mutex_unlock(&spk_mutex);
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return 0;
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}
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}
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if (in_synth->startup)
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status = do_synth_init(in_synth);
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if (!status)
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list_add_tail(&in_synth->node, &synths);
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mutex_unlock(&spk_mutex);
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return status;
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}
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EXPORT_SYMBOL_GPL(synth_add);
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void synth_remove(struct spk_synth *in_synth)
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{
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mutex_lock(&spk_mutex);
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if (synth == in_synth)
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synth_release();
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list_del(&in_synth->node);
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module_status = 0;
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mutex_unlock(&spk_mutex);
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}
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EXPORT_SYMBOL_GPL(synth_remove);
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struct spk_synth *synth_current(void)
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{
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return synth;
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}
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EXPORT_SYMBOL_GPL(synth_current);
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short spk_punc_masks[] = { 0, SOME, MOST, PUNC, PUNC | B_SYM };
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