linux/drivers/accessibility/speakup/speakup_dtlk.c
Osama Muhammad 251ca7da30 Accessiblity: speakup_dtlk: specifying the default driver parameters among the module params
This is an enhancement which allows to specify the default driver
parameters among the module parameters.

Adding default variables to the speakup_dtlk module
allows to easily set that at boot, rather than
setting the sys variables after boot.
More details can be found here:
https://github.com/linux-speakup/speakup/issues/7

Signed-off-by: Osama Muhammad <osmtendev@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20221109215108.7933-9-osmtendev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-11-23 19:46:26 +01:00

419 lines
12 KiB
C

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