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// SPDX-License-Identifier: GPL-2.0+
/*
* written by David Borowski
*
* Copyright (C) 2003 David Borowski.
*
* specificly written as a driver for the speakup screenreview
* package it's not a general device driver.
* This driver is for the Keynote Gold internal synthesizer.
*/
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/kthread.h>
#include <linux/serial_reg.h>
#include "spk_priv.h"
#include "speakup.h"
#define DRV_VERSION "2.10"
#define SYNTH_IO_EXTENT 0x04
#define SWAIT udelay(70)
#define PROCSPEECH 0x1f
#define SYNTH_CLEAR 0x03
static int synth_probe(struct spk_synth *synth);
static void keynote_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_port;
static int port_forced;
static unsigned int synth_portlist[] = { 0x2a8, 0 };
static struct var_t vars[] = {
{ CAPS_START, .u.s = {"[f130]" } },
{ CAPS_STOP, .u.s = {"[f90]" } },
{ RATE, .u.n = {"\04%c ", 8, 0, 10, 81, -8, NULL } },
{ PITCH, .u.n = {"[f%d]", 5, 0, 9, 40, 10, NULL } },
{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
V_LAST_VAR
};
/*
* These attributes will appear in /sys/accessibility/speakup/keypc.
*/
static struct kobj_attribute caps_start_attribute =
__ATTR(caps_start, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute caps_stop_attribute =
__ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute pitch_attribute =
__ATTR(pitch, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute rate_attribute =
__ATTR(rate, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute delay_time_attribute =
__ATTR(delay_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute direct_attribute =
__ATTR(direct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute full_time_attribute =
__ATTR(full_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute jiffy_delta_attribute =
__ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute trigger_time_attribute =
__ATTR(trigger_time, 0644, spk_var_show, spk_var_store);
/*
* Create a group of attributes so that we can create and destroy them all
* at once.
*/
static struct attribute *synth_attrs[] = {
&caps_start_attribute.attr,
&caps_stop_attribute.attr,
&pitch_attribute.attr,
&rate_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_keypc = {
.name = "keypc",
.version = DRV_VERSION,
.long_name = "Keynote PC",
.init = "[t][n7,1][n8,0]",
.procspeech = PROCSPEECH,
.clear = SYNTH_CLEAR,
.delay = 500,
.trigger = 50,
.jiffies = 50,
.full = 1000,
.startup = SYNTH_START,
.checkval = SYNTH_CHECK,
.vars = vars,
.io_ops = &spk_serial_io_ops,
.probe = synth_probe,
.release = keynote_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 = NULL,
.indexing = {
.command = NULL,
.lowindex = 0,
.highindex = 0,
.currindex = 0,
},
.attributes = {
.attrs = synth_attrs,
.name = "keypc",
},
};
static inline bool synth_writable(void)
{
return (inb_p(synth_port + UART_RX) & 0x10) != 0;
}
static inline bool synth_full(void)
{
return (inb_p(synth_port + UART_RX) & 0x80) == 0;
}
static char *oops(void)
{
int s1, s2, s3, s4;
s1 = inb_p(synth_port);
s2 = inb_p(synth_port + 1);
s3 = inb_p(synth_port + 2);
s4 = inb_p(synth_port + 3);
pr_warn("synth timeout %d %d %d %d\n", s1, s2, s3, s4);
return NULL;
}
static const char *synth_immediate(struct spk_synth *synth, const char *buf)
{
u_char ch;
int timeout;
while ((ch = *buf)) {
if (ch == '\n')
ch = PROCSPEECH;
if (synth_full())
return buf;
timeout = 1000;
while (synth_writable())
if (--timeout <= 0)
return oops();
outb_p(ch, synth_port);
udelay(70);
buf++;
}
return NULL;
}
static void do_catch_up(struct spk_synth *synth)
{
u_char ch;
int timeout;
unsigned long flags;
unsigned long jiff_max;
struct var_t *jiffy_delta;
struct var_t *delay_time;
struct var_t *full_time;
int delay_time_val;
int full_time_val;
int jiffy_delta_val;
jiffy_delta = spk_get_var(JIFFY);
delay_time = spk_get_var(DELAY);
full_time = spk_get_var(FULL);
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);
full_time_val = full_time->u.n.value;
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
if (synth_full()) {
schedule_timeout(msecs_to_jiffies(full_time_val));
continue;
}
set_current_state(TASK_RUNNING);
timeout = 1000;
while (synth_writable())
if (--timeout <= 0)
break;
if (timeout <= 0) {
oops();
break;
}
spin_lock_irqsave(&speakup_info.spinlock, flags);
ch = synth_buffer_getc();
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
if (ch == '\n')
ch = PROCSPEECH;
outb_p(ch, synth_port);
SWAIT;
if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
timeout = 1000;
while (synth_writable())
if (--timeout <= 0)
break;
if (timeout <= 0) {
oops();
break;
}
outb_p(PROCSPEECH, synth_port);
spin_lock_irqsave(&speakup_info.spinlock, flags);
jiffy_delta_val = jiffy_delta->u.n.value;
delay_time_val = delay_time->u.n.value;
spin_unlock_irqrestore(&speakup_info.spinlock, flags);
schedule_timeout(msecs_to_jiffies(delay_time_val));
jiff_max = jiffies + jiffy_delta_val;
}
}
timeout = 1000;
while (synth_writable())
if (--timeout <= 0)
break;
if (timeout <= 0)
oops();
else
outb_p(PROCSPEECH, synth_port);
}
static void synth_flush(struct spk_synth *synth)
{
outb_p(SYNTH_CLEAR, synth_port);
}
static int synth_probe(struct spk_synth *synth)
{
unsigned int port_val = 0;
int i = 0;
pr_info("Probing for %s.\n", synth->long_name);
if (port_forced) {
synth_port = port_forced;
pr_info("probe forced to %x by kernel command line\n",
synth_port);
if (synth_request_region(synth_port - 1, SYNTH_IO_EXTENT)) {
pr_warn("sorry, port already reserved\n");
return -EBUSY;
}
port_val = inb(synth_port);
} else {
for (i = 0; synth_portlist[i]; i++) {
if (synth_request_region(synth_portlist[i],
SYNTH_IO_EXTENT)) {
pr_warn
("request_region: failed with 0x%x, %d\n",
synth_portlist[i], SYNTH_IO_EXTENT);
continue;
}
port_val = inb(synth_portlist[i]);
if (port_val == 0x80) {
synth_port = synth_portlist[i];
break;
}
}
}
if (port_val != 0x80) {
pr_info("%s: not found\n", synth->long_name);
synth_release_region(synth_port, SYNTH_IO_EXTENT);
synth_port = 0;
return -ENODEV;
}
pr_info("%s: %03x-%03x, driver version %s,\n", synth->long_name,
synth_port, synth_port + SYNTH_IO_EXTENT - 1,
synth->version);
synth->alive = 1;
return 0;
}
static void keynote_release(struct spk_synth *synth)
{
spk_stop_serial_interrupt();
if (synth_port)
synth_release_region(synth_port, SYNTH_IO_EXTENT);
synth_port = 0;
}
module_param_hw_named(port, port_forced, int, ioport, 0444);
module_param_named(start, synth_keypc.startup, short, 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_spk_synth(synth_keypc);
MODULE_AUTHOR("David Borowski");
MODULE_DESCRIPTION("Speakup support for Keynote Gold PC synthesizers");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
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