336 lines
8.7 KiB
C
336 lines
8.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* written by David Borowski
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*
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* Copyright (C) 2003 David Borowski.
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*
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* specifically 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 Keynote Gold 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 <linux/serial_reg.h>
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#include "spk_priv.h"
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#include "speakup.h"
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#define DRV_VERSION "2.10"
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#define SYNTH_IO_EXTENT 0x04
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#define SWAIT udelay(70)
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#define PROCSPEECH 0x1f
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#define SYNTH_CLEAR 0x03
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static int synth_probe(struct spk_synth *synth);
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static void keynote_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_port;
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static int port_forced;
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static unsigned int synth_portlist[] = { 0x2a8, 0 };
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enum default_vars_id {
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CAPS_START_ID = 0, CAPS_STOP_ID,
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RATE_ID, PITCH_ID,
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DIRECT_ID, V_LAST_VAR_ID,
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NB_ID
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};
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static struct var_t vars[NB_ID] = {
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[CAPS_START_ID] = { CAPS_START, .u.s = {"[f130]" } },
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[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"[f90]" } },
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[RATE_ID] = { RATE, .u.n = {"\04%c ", 8, 0, 10, 81, -8, NULL } },
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[PITCH_ID] = { PITCH, .u.n = {"[f%d]", 5, 0, 9, 40, 10, NULL } },
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[DIRECT_ID] = { 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/keypc.
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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 rate_attribute =
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__ATTR(rate, 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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&pitch_attribute.attr,
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&rate_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_keypc = {
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.name = "keypc",
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.version = DRV_VERSION,
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.long_name = "Keynote PC",
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.init = "[t][n7,1][n8,0]",
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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 = 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 = keynote_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 = NULL,
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.indexing = {
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.command = NULL,
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.lowindex = 0,
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.highindex = 0,
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.currindex = 0,
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},
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.attributes = {
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.attrs = synth_attrs,
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.name = "keypc",
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},
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};
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static inline bool synth_writable(void)
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{
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return (inb_p(synth_port + UART_RX) & 0x10) != 0;
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}
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static inline bool synth_full(void)
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{
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return (inb_p(synth_port + UART_RX) & 0x80) == 0;
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}
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static char *oops(void)
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{
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int s1, s2, s3, s4;
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s1 = inb_p(synth_port);
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s2 = inb_p(synth_port + 1);
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s3 = inb_p(synth_port + 2);
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s4 = inb_p(synth_port + 3);
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pr_warn("synth timeout %d %d %d %d\n", s1, s2, s3, s4);
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return NULL;
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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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int timeout;
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while ((ch = *buf)) {
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if (ch == '\n')
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ch = PROCSPEECH;
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if (synth_full())
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return buf;
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timeout = 1000;
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while (synth_writable())
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if (--timeout <= 0)
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return oops();
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outb_p(ch, synth_port);
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udelay(70);
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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 do_catch_up(struct spk_synth *synth)
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{
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u_char ch;
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int timeout;
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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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struct var_t *full_time;
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int delay_time_val;
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int full_time_val;
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int jiffy_delta_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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full_time = spk_get_var(FULL);
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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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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_full()) {
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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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set_current_state(TASK_RUNNING);
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timeout = 1000;
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while (synth_writable())
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if (--timeout <= 0)
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break;
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if (timeout <= 0) {
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oops();
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break;
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}
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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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outb_p(ch, synth_port);
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SWAIT;
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if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
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timeout = 1000;
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while (synth_writable())
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if (--timeout <= 0)
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break;
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if (timeout <= 0) {
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oops();
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break;
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}
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outb_p(PROCSPEECH, synth_port);
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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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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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timeout = 1000;
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while (synth_writable())
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if (--timeout <= 0)
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break;
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if (timeout <= 0)
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oops();
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else
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outb_p(PROCSPEECH, synth_port);
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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, synth_port);
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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;
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pr_info("Probing for %s.\n", synth->long_name);
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if (port_forced) {
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synth_port = port_forced;
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pr_info("probe forced to %x by kernel command line\n",
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synth_port);
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if (synth_request_region(synth_port - 1, 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 = inb(synth_port);
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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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pr_warn
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("request_region: failed with 0x%x, %d\n",
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synth_portlist[i], SYNTH_IO_EXTENT);
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continue;
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}
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port_val = inb(synth_portlist[i]);
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if (port_val == 0x80) {
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synth_port = synth_portlist[i];
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break;
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}
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}
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}
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if (port_val != 0x80) {
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pr_info("%s: not found\n", synth->long_name);
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synth_release_region(synth_port, SYNTH_IO_EXTENT);
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synth_port = 0;
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return -ENODEV;
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}
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pr_info("%s: %03x-%03x, driver version %s,\n", synth->long_name,
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synth_port, synth_port + SYNTH_IO_EXTENT - 1,
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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 keynote_release(struct spk_synth *synth)
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{
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spk_stop_serial_interrupt();
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if (synth_port)
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synth_release_region(synth_port, SYNTH_IO_EXTENT);
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synth_port = 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_keypc.startup, short, 0444);
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module_param_named(rate, vars[RATE_ID].u.n.default_val, int, 0444);
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module_param_named(pitch, vars[PITCH_ID].u.n.default_val, int, 0444);
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module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 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_PARM_DESC(rate, "Set the rate variable on load.");
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MODULE_PARM_DESC(pitch, "Set the pitch variable on load.");
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MODULE_PARM_DESC(direct, "Set the direct variable on load.");
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module_spk_synth(synth_keypc);
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MODULE_AUTHOR("David Borowski");
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MODULE_DESCRIPTION("Speakup support for Keynote Gold PC synthesizers");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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