391 lines
11 KiB
C
391 lines
11 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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* package it's not a general device driver.
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* This driver is for the RC Systems DoubleTalk PC internal synthesizer.
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*/
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#include <linux/jiffies.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 "spk_priv.h"
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#include "serialio.h"
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#include "speakup_dtlk.h" /* local header file for DoubleTalk values */
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#include "speakup.h"
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#define DRV_VERSION "2.10"
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#define PROCSPEECH 0x00
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static int synth_probe(struct spk_synth *synth);
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static void dtlk_release(struct spk_synth *synth);
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static const char *synth_immediate(struct spk_synth *synth, const char *buf);
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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 int synth_lpc;
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static int port_forced;
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static unsigned int synth_portlist[] = {
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0x25e, 0x29e, 0x2de, 0x31e, 0x35e, 0x39e, 0
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};
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static u_char synth_status;
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static struct var_t vars[] = {
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{ CAPS_START, .u.s = {"\x01+35p" } },
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{ CAPS_STOP, .u.s = {"\x01-35p" } },
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{ RATE, .u.n = {"\x01%ds", 8, 0, 9, 0, 0, NULL } },
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{ PITCH, .u.n = {"\x01%dp", 50, 0, 99, 0, 0, NULL } },
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{ VOL, .u.n = {"\x01%dv", 5, 0, 9, 0, 0, NULL } },
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{ TONE, .u.n = {"\x01%dx", 1, 0, 2, 0, 0, NULL } },
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{ PUNCT, .u.n = {"\x01%db", 7, 0, 15, 0, 0, NULL } },
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{ VOICE, .u.n = {"\x01%do", 0, 0, 7, 0, 0, NULL } },
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{ FREQUENCY, .u.n = {"\x01%df", 5, 0, 9, 0, 0, NULL } },
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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/dtlk.
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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 freq_attribute =
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__ATTR(freq, 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 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 tone_attribute =
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__ATTR(tone, 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 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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&freq_attribute.attr,
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&pitch_attribute.attr,
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&punct_attribute.attr,
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&rate_attribute.attr,
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&tone_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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&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 struct spk_synth synth_dtlk = {
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.name = "dtlk",
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.version = DRV_VERSION,
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.long_name = "DoubleTalk PC",
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.init = "\x01@\x01\x31y",
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.procspeech = PROCSPEECH,
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.clear = SYNTH_CLEAR,
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.delay = 500,
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.trigger = 30,
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.jiffies = 50,
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.full = 1000,
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.startup = SYNTH_START,
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.checkval = SYNTH_CHECK,
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.vars = vars,
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.io_ops = &spk_serial_io_ops,
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.probe = synth_probe,
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.release = dtlk_release,
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.synth_immediate = 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_nop,
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.synth_adjust = NULL,
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.read_buff_add = NULL,
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.get_index = spk_synth_get_index,
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.indexing = {
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.command = "\x01%di",
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.lowindex = 1,
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.highindex = 5,
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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 = "dtlk",
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},
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};
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static inline bool synth_readable(void)
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{
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synth_status = inb_p(speakup_info.port_tts + UART_RX);
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return (synth_status & TTS_READABLE) != 0;
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}
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static inline bool synth_writable(void)
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{
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synth_status = inb_p(speakup_info.port_tts + UART_RX);
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return (synth_status & TTS_WRITABLE) != 0;
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}
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static inline bool synth_full(void)
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{
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synth_status = inb_p(speakup_info.port_tts + UART_RX);
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return (synth_status & TTS_ALMOST_FULL) != 0;
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}
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static void spk_out(const char ch)
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{
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int timeout = SPK_XMITR_TIMEOUT;
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while (!synth_writable()) {
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if (!--timeout)
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break;
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udelay(1);
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}
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outb_p(ch, speakup_info.port_tts);
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timeout = SPK_XMITR_TIMEOUT;
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while (synth_writable()) {
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if (!--timeout)
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break;
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udelay(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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u_char ch;
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unsigned long flags;
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unsigned long jiff_max;
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struct var_t *jiffy_delta;
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struct var_t *delay_time;
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int jiffy_delta_val;
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int delay_time_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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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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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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set_current_state(TASK_INTERRUPTIBLE);
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delay_time_val = delay_time->u.n.value;
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (synth_full()) {
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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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ch = synth_buffer_getc();
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spin_unlock_irqrestore(&speakup_info.spinlock, flags);
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if (ch == '\n')
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ch = PROCSPEECH;
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spk_out(ch);
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if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
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spk_out(PROCSPEECH);
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spin_lock_irqsave(&speakup_info.spinlock, flags);
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delay_time_val = delay_time->u.n.value;
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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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schedule_timeout(msecs_to_jiffies(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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spk_out(PROCSPEECH);
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}
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static const char *synth_immediate(struct spk_synth *synth, const char *buf)
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{
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u_char ch;
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while ((ch = (u_char)*buf)) {
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if (synth_full())
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return buf;
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if (ch == '\n')
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ch = PROCSPEECH;
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spk_out(ch);
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buf++;
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}
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return NULL;
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}
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static void synth_flush(struct spk_synth *synth)
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{
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outb_p(SYNTH_CLEAR, speakup_info.port_tts);
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while (synth_writable())
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cpu_relax();
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}
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static char synth_read_tts(void)
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{
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u_char ch;
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while (!synth_readable())
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cpu_relax();
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ch = synth_status & 0x7f;
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outb_p(ch, speakup_info.port_tts);
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while (synth_readable())
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cpu_relax();
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return (char)ch;
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}
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/* interrogate the DoubleTalk PC and return its settings */
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static struct synth_settings *synth_interrogate(struct spk_synth *synth)
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{
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u_char *t;
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static char buf[sizeof(struct synth_settings) + 1];
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int total, i;
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static struct synth_settings status;
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synth_immediate(synth, "\x18\x01?");
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for (total = 0, i = 0; i < 50; i++) {
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buf[total] = synth_read_tts();
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if (total > 2 && buf[total] == 0x7f)
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break;
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if (total < sizeof(struct synth_settings))
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total++;
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}
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t = buf;
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/* serial number is little endian */
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status.serial_number = t[0] + t[1] * 256;
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t += 2;
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for (i = 0; *t != '\r'; t++) {
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status.rom_version[i] = *t;
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if (i < sizeof(status.rom_version) - 1)
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i++;
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}
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status.rom_version[i] = 0;
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t++;
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status.mode = *t++;
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status.punc_level = *t++;
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status.formant_freq = *t++;
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status.pitch = *t++;
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status.speed = *t++;
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status.volume = *t++;
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status.tone = *t++;
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status.expression = *t++;
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status.ext_dict_loaded = *t++;
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status.ext_dict_status = *t++;
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status.free_ram = *t++;
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status.articulation = *t++;
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status.reverb = *t++;
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status.eob = *t++;
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return &status;
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}
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static int synth_probe(struct spk_synth *synth)
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{
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unsigned int port_val = 0;
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int i = 0;
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struct synth_settings *sp;
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pr_info("Probing for DoubleTalk.\n");
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if (port_forced) {
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speakup_info.port_tts = port_forced;
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pr_info("probe forced to %x by kernel command line\n",
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speakup_info.port_tts);
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if ((port_forced & 0xf) != 0xf)
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pr_info("warning: port base should probably end with f\n");
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if (synth_request_region(speakup_info.port_tts - 1,
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SYNTH_IO_EXTENT)) {
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pr_warn("sorry, port already reserved\n");
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return -EBUSY;
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}
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port_val = inw(speakup_info.port_tts - 1);
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synth_lpc = speakup_info.port_tts - 1;
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} else {
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for (i = 0; synth_portlist[i]; i++) {
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if (synth_request_region(synth_portlist[i],
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SYNTH_IO_EXTENT))
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continue;
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port_val = inw(synth_portlist[i]) & 0xfbff;
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if (port_val == 0x107f) {
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synth_lpc = synth_portlist[i];
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speakup_info.port_tts = synth_lpc + 1;
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break;
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}
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synth_release_region(synth_portlist[i],
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SYNTH_IO_EXTENT);
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}
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}
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port_val &= 0xfbff;
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if (port_val != 0x107f) {
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pr_info("DoubleTalk PC: not found\n");
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if (synth_lpc)
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synth_release_region(synth_lpc, SYNTH_IO_EXTENT);
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return -ENODEV;
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}
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while (inw_p(synth_lpc) != 0x147f)
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cpu_relax(); /* wait until it's ready */
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sp = synth_interrogate(synth);
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pr_info("%s: %03x-%03x, ROM ver %s, s/n %u, driver: %s\n",
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synth->long_name, synth_lpc, synth_lpc + SYNTH_IO_EXTENT - 1,
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sp->rom_version, sp->serial_number, synth->version);
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synth->alive = 1;
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return 0;
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}
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static void dtlk_release(struct spk_synth *synth)
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{
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spk_stop_serial_interrupt();
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if (speakup_info.port_tts)
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synth_release_region(speakup_info.port_tts - 1,
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SYNTH_IO_EXTENT);
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speakup_info.port_tts = 0;
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}
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module_param_hw_named(port, port_forced, int, ioport, 0444);
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module_param_named(start, synth_dtlk.startup, short, 0444);
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MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
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MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
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module_spk_synth(synth_dtlk);
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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 DoubleTalk PC synthesizers");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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