drivers/accessibility/speakup/speakup_dectlk.c - third_party/linux - Git at Google


            
            // 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

            
             * s not a general device driver.

            
             */

            
            #include <linux/unistd.h>

            
            #include <linux/proc_fs.h>

            
            #include <linux/jiffies.h>

            
            #include <linux/spinlock.h>

            
            #include <linux/sched.h>

            
            #include <linux/timer.h>

            
            #include <linux/kthread.h>

            
            #include "speakup.h"

            
            #include "spk_priv.h"


            #define DRV_VERSION "2.20"

            
            #define SYNTH_CLEAR 0x03

            
            #define PROCSPEECH 0x0b

            
            static int xoff;


            static inline int synth_full(void)

            
            {

            
            	return xoff;

            
            }


            static void do_catch_up(struct spk_synth *synth);

            
            static void synth_flush(struct spk_synth *synth);

            
            static void read_buff_add(u_char c);

            
            static unsigned char get_index(struct spk_synth *synth);


            static int in_escape;

            
            static int is_flushing;


            static DEFINE_SPINLOCK(flush_lock);

            
            static DECLARE_WAIT_QUEUE_HEAD(flush);


            enum default_vars_id {

            
            	CAPS_START_ID = 0, CAPS_STOP_ID,

            
            	RATE_ID, PITCH_ID, INFLECTION_ID,

            
            	VOL_ID, PUNCT_ID, VOICE_ID,

            
            	DIRECT_ID, V_LAST_VAR_ID,

            
            	NB_ID,

            
            };


            static struct var_t vars[NB_ID] = {

            
            	[CAPS_START_ID] = { CAPS_START, .u.s = {"[:dv ap 160] " } },

            
            	[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"[:dv ap 100 ] " } },

            
            	[RATE_ID] = { RATE, .u.n = {"[:ra %d] ", 180, 75, 650, 0, 0, NULL } },

            
            	[PITCH_ID] = { PITCH, .u.n = {"[:dv ap %d] ", 122, 50, 350, 0, 0, NULL } },

            
            	[INFLECTION_ID] = { INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } },

            
            	[VOL_ID] = { VOL, .u.n = {"[:dv g5 %d] ", 86, 60, 86, 0, 0, NULL } },

            
            	[PUNCT_ID] = { PUNCT, .u.n = {"[:pu %c] ", 0, 0, 2, 0, 0, "nsa" } },

            
            	[VOICE_ID] = { VOICE, .u.n = {"[:n%c] ", 0, 0, 9, 0, 0, "phfdburwkv" } },

            
            	[DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },

            
            	V_LAST_VAR

            
            };


            /*

            
             * These attributes will appear in /sys/accessibility/speakup/dectlk.

            
             */

            
            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 inflection_attribute =

            
            	__ATTR(inflection, 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 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 flush_time_attribute =

            
            	__ATTR(flush_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,

            
            	&inflection_attribute.attr,

            
            	&punct_attribute.attr,

            
            	&rate_attribute.attr,

            
            	&voice_attribute.attr,

            
            	&vol_attribute.attr,

            
            	&delay_time_attribute.attr,

            
            	&direct_attribute.attr,

            
            	&full_time_attribute.attr,

            
            	&flush_time_attribute.attr,

            
            	&jiffy_delta_attribute.attr,

            
            	&trigger_time_attribute.attr,

            
            	NULL,	/* need to NULL terminate the list of attributes */

            
            };


            static int ap_defaults[] = {122, 89, 155, 110, 208, 240, 200, 106, 306};

            
            static int g5_defaults[] = {86, 81, 86, 84, 81, 80, 83, 83, 73};


            static struct spk_synth synth_dectlk = {

            
            	.name = "dectlk",

            
            	.version = DRV_VERSION,

            
            	.long_name = "Dectalk Express",

            
            	.init = "[:error sp :name paul :rate 180 :tsr off] ",

            
            	.procspeech = PROCSPEECH,

            
            	.clear = SYNTH_CLEAR,

            
            	.delay = 500,

            
            	.trigger = 50,

            
            	.jiffies = 50,

            
            	.full = 40000,

            
            	.flush_time = 4000,

            
            	.dev_name = SYNTH_DEFAULT_DEV,

            
            	.startup = SYNTH_START,

            
            	.checkval = SYNTH_CHECK,

            
            	.vars = vars,

            
            	.default_pitch = ap_defaults,

            
            	.default_vol = g5_defaults,

            
            	.io_ops = &spk_ttyio_ops,

            
            	.probe = spk_ttyio_synth_probe,

            
            	.release = spk_ttyio_release,

            
            	.synth_immediate = spk_ttyio_synth_immediate,

            
            	.catch_up = do_catch_up,

            
            	.flush = synth_flush,

            
            	.is_alive = spk_synth_is_alive_restart,

            
            	.synth_adjust = NULL,

            
            	.read_buff_add = read_buff_add,

            
            	.get_index = get_index,

            
            	.indexing = {

            
            		.command = "[:in re %d ] ",

            
            		.lowindex = 1,

            
            		.highindex = 8,

            
            		.currindex = 1,

            
            	},

            
            	.attributes = {

            
            		.attrs = synth_attrs,

            
            		.name = "dectlk",

            
            	},

            
            };


            static int is_indnum(u_char *ch)

            
            {

            
            	if ((*ch >= '0') && (*ch <= '9')) {

            
            		*ch = *ch - '0';

            
            		return 1;

            
            	}

            
            	return 0;

            
            }


            static u_char lastind;


            static unsigned char get_index(struct spk_synth *synth)

            
            {

            
            	u_char rv;


            	rv = lastind;

            
            	lastind = 0;

            
            	return rv;

            
            }


            static void read_buff_add(u_char c)

            
            {

            
            	static int ind = -1;


            	if (c == 0x01) {

            
            		unsigned long flags;


            		spin_lock_irqsave(&flush_lock, flags);

            
            		is_flushing = 0;

            
            		wake_up_interruptible(&flush);

            
            		spin_unlock_irqrestore(&flush_lock, flags);

            
            	} else if (c == 0x13) {

            
            		xoff = 1;

            
            	} else if (c == 0x11) {

            
            		xoff = 0;

            
            	} else if (is_indnum(&c)) {

            
            		if (ind == -1)

            
            			ind = c;

            
            		else

            
            			ind = ind * 10 + c;

            
            	} else if ((c > 31) && (c < 127)) {

            
            		if (ind != -1)

            
            			lastind = (u_char)ind;

            
            		ind = -1;

            
            	}

            
            }


            static void do_catch_up(struct spk_synth *synth)

            
            {

            
            	int synth_full_val = 0;

            
            	static u_char ch;

            
            	static u_char last = '\0';

            
            	unsigned long flags;

            
            	unsigned long jiff_max;

            
            	unsigned long timeout;

            
            	DEFINE_WAIT(wait);

            
            	struct var_t *jiffy_delta;

            
            	struct var_t *delay_time;

            
            	struct var_t *flush_time;

            
            	int jiffy_delta_val;

            
            	int delay_time_val;

            
            	int timeout_val;


            	jiffy_delta = spk_get_var(JIFFY);

            
            	delay_time = spk_get_var(DELAY);

            
            	flush_time = spk_get_var(FLUSH);

            
            	spin_lock_irqsave(&speakup_info.spinlock, flags);

            
            	jiffy_delta_val = jiffy_delta->u.n.value;

            
            	timeout_val = flush_time->u.n.value;

            
            	spin_unlock_irqrestore(&speakup_info.spinlock, flags);

            
            	timeout = msecs_to_jiffies(timeout_val);

            
            	jiff_max = jiffies + jiffy_delta_val;


            	while (!kthread_should_stop()) {

            
            		/* if no ctl-a in 4, send data anyway */

            
            		spin_lock_irqsave(&flush_lock, flags);

            
            		while (is_flushing && timeout) {

            
            			prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);

            
            			spin_unlock_irqrestore(&flush_lock, flags);

            
            			timeout = schedule_timeout(timeout);

            
            			spin_lock_irqsave(&flush_lock, flags);

            
            		}

            
            		finish_wait(&flush, &wait);

            
            		is_flushing = 0;

            
            		spin_unlock_irqrestore(&flush_lock, flags);


            		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;

            
            		}

            
            		ch = synth_buffer_peek();

            
            		set_current_state(TASK_INTERRUPTIBLE);

            
            		delay_time_val = delay_time->u.n.value;

            
            		synth_full_val = synth_full();

            
            		spin_unlock_irqrestore(&speakup_info.spinlock, flags);

            
            		if (ch == '\n')

            
            			ch = 0x0D;

            
            		if (synth_full_val || !synth->io_ops->synth_out(synth, ch)) {

            
            			schedule_timeout(msecs_to_jiffies(delay_time_val));

            
            			continue;

            
            		}

            
            		set_current_state(TASK_RUNNING);

            
            		spin_lock_irqsave(&speakup_info.spinlock, flags);

            
            		synth_buffer_getc();

            
            		spin_unlock_irqrestore(&speakup_info.spinlock, flags);

            
            		if (ch == '[') {

            
            			in_escape = 1;

            
            		} else if (ch == ']') {

            
            			in_escape = 0;

            
            		} else if (ch <= SPACE) {

            
            			if (!in_escape && strchr(",.!?;:", last))

            
            				synth->io_ops->synth_out(synth, PROCSPEECH);

            
            			if (time_after_eq(jiffies, jiff_max)) {

            
            				if (!in_escape)

            
            					synth->io_ops->synth_out(synth,

            
            								 PROCSPEECH);

            
            				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;

            
            			}

            
            		}

            
            		last = ch;

            
            	}

            
            	if (!in_escape)

            
            		synth->io_ops->synth_out(synth, PROCSPEECH);

            
            }


            static void synth_flush(struct spk_synth *synth)

            
            {

            
            	if (in_escape)

            
            		/* if in command output ']' so we don't get an error */

            
            		synth->io_ops->synth_out(synth, ']');

            
            	in_escape = 0;

            
            	is_flushing = 1;

            
            	synth->io_ops->flush_buffer(synth);

            
            	synth->io_ops->synth_out(synth, SYNTH_CLEAR);

            
            }


            module_param_named(ser, synth_dectlk.ser, int, 0444);

            
            module_param_named(dev, synth_dectlk.dev_name, charp, 0444);

            
            module_param_named(start, synth_dectlk.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(inflection, vars[INFLECTION_ID].u.n.default_val, int, 0444);

            
            module_param_named(vol, vars[VOL_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(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);


            MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");

            
            MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");

            
            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(inflection, "Set the inflection variable on load.");

            
            MODULE_PARM_DESC(vol, "Set the vol 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(direct, "Set the direct variable on load.");


            module_spk_synth(synth_dectlk);


            MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");

            
            MODULE_AUTHOR("David Borowski");

            
            MODULE_DESCRIPTION("Speakup support for DECtalk Express synthesizers");

            
            MODULE_LICENSE("GPL");

            
            MODULE_VERSION(DRV_VERSION);
	// 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
	* s not a general device driver.
	*/
	#include <linux/unistd.h>
	#include <linux/proc_fs.h>
	#include <linux/jiffies.h>
	#include <linux/spinlock.h>
	#include <linux/sched.h>
	#include <linux/timer.h>
	#include <linux/kthread.h>
	#include "speakup.h"
	#include "spk_priv.h"

	#define DRV_VERSION "2.20"
	#define SYNTH_CLEAR 0x03
	#define PROCSPEECH 0x0b
	static int xoff;

	static inline int synth_full(void)
	{
	return xoff;
	}

	static void do_catch_up(struct spk_synth *synth);
	static void synth_flush(struct spk_synth *synth);
	static void read_buff_add(u_char c);
	static unsigned char get_index(struct spk_synth *synth);

	static int in_escape;
	static int is_flushing;

	static DEFINE_SPINLOCK(flush_lock);
	static DECLARE_WAIT_QUEUE_HEAD(flush);

	enum default_vars_id {
	CAPS_START_ID = 0, CAPS_STOP_ID,
	RATE_ID, PITCH_ID, INFLECTION_ID,
	VOL_ID, PUNCT_ID, VOICE_ID,
	DIRECT_ID, V_LAST_VAR_ID,
	NB_ID,
	};

	static struct var_t vars[NB_ID] = {
	[CAPS_START_ID] = { CAPS_START, .u.s = {"[:dv ap 160] " } },
	[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"[:dv ap 100 ] " } },
	[RATE_ID] = { RATE, .u.n = {"[:ra %d] ", 180, 75, 650, 0, 0, NULL } },
	[PITCH_ID] = { PITCH, .u.n = {"[:dv ap %d] ", 122, 50, 350, 0, 0, NULL } },
	[INFLECTION_ID] = { INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } },
	[VOL_ID] = { VOL, .u.n = {"[:dv g5 %d] ", 86, 60, 86, 0, 0, NULL } },
	[PUNCT_ID] = { PUNCT, .u.n = {"[:pu %c] ", 0, 0, 2, 0, 0, "nsa" } },
	[VOICE_ID] = { VOICE, .u.n = {"[:n%c] ", 0, 0, 9, 0, 0, "phfdburwkv" } },
	[DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
	V_LAST_VAR
	};

	/*
	* These attributes will appear in /sys/accessibility/speakup/dectlk.
	*/
	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 inflection_attribute =
	__ATTR(inflection, 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 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 flush_time_attribute =
	__ATTR(flush_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,
	&inflection_attribute.attr,
	&punct_attribute.attr,
	&rate_attribute.attr,
	&voice_attribute.attr,
	&vol_attribute.attr,
	&delay_time_attribute.attr,
	&direct_attribute.attr,
	&full_time_attribute.attr,
	&flush_time_attribute.attr,
	&jiffy_delta_attribute.attr,
	&trigger_time_attribute.attr,
	NULL, /* need to NULL terminate the list of attributes */
	};

	static int ap_defaults[] = {122, 89, 155, 110, 208, 240, 200, 106, 306};
	static int g5_defaults[] = {86, 81, 86, 84, 81, 80, 83, 83, 73};

	static struct spk_synth synth_dectlk = {
	.name = "dectlk",
	.version = DRV_VERSION,
	.long_name = "Dectalk Express",
	.init = "[:error sp :name paul :rate 180 :tsr off] ",
	.procspeech = PROCSPEECH,
	.clear = SYNTH_CLEAR,
	.delay = 500,
	.trigger = 50,
	.jiffies = 50,
	.full = 40000,
	.flush_time = 4000,
	.dev_name = SYNTH_DEFAULT_DEV,
	.startup = SYNTH_START,
	.checkval = SYNTH_CHECK,
	.vars = vars,
	.default_pitch = ap_defaults,
	.default_vol = g5_defaults,
	.io_ops = &spk_ttyio_ops,
	.probe = spk_ttyio_synth_probe,
	.release = spk_ttyio_release,
	.synth_immediate = spk_ttyio_synth_immediate,
	.catch_up = do_catch_up,
	.flush = synth_flush,
	.is_alive = spk_synth_is_alive_restart,
	.synth_adjust = NULL,
	.read_buff_add = read_buff_add,
	.get_index = get_index,
	.indexing = {
	.command = "[:in re %d ] ",
	.lowindex = 1,
	.highindex = 8,
	.currindex = 1,
	},
	.attributes = {
	.attrs = synth_attrs,
	.name = "dectlk",
	},
	};

	static int is_indnum(u_char *ch)
	{
	if ((ch >= '0') && (ch <= '9')) {
	ch = ch - '0';
	return 1;
	}
	return 0;
	}

	static u_char lastind;

	static unsigned char get_index(struct spk_synth *synth)
	{
	u_char rv;

	rv = lastind;
	lastind = 0;
	return rv;
	}

	static void read_buff_add(u_char c)
	{
	static int ind = -1;

	if (c == 0x01) {
	unsigned long flags;

	spin_lock_irqsave(&flush_lock, flags);
	is_flushing = 0;
	wake_up_interruptible(&flush);
	spin_unlock_irqrestore(&flush_lock, flags);
	} else if (c == 0x13) {
	xoff = 1;
	} else if (c == 0x11) {
	xoff = 0;
	} else if (is_indnum(&c)) {
	if (ind == -1)
	ind = c;
	else
	ind = ind * 10 + c;
	} else if ((c > 31) && (c < 127)) {
	if (ind != -1)
	lastind = (u_char)ind;
	ind = -1;
	}
	}

	static void do_catch_up(struct spk_synth *synth)
	{
	int synth_full_val = 0;
	static u_char ch;
	static u_char last = '\0';
	unsigned long flags;
	unsigned long jiff_max;
	unsigned long timeout;
	DEFINE_WAIT(wait);
	struct var_t *jiffy_delta;
	struct var_t *delay_time;
	struct var_t *flush_time;
	int jiffy_delta_val;
	int delay_time_val;
	int timeout_val;

	jiffy_delta = spk_get_var(JIFFY);
	delay_time = spk_get_var(DELAY);
	flush_time = spk_get_var(FLUSH);
	spin_lock_irqsave(&speakup_info.spinlock, flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	timeout_val = flush_time->u.n.value;
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	timeout = msecs_to_jiffies(timeout_val);
	jiff_max = jiffies + jiffy_delta_val;

	while (!kthread_should_stop()) {
	/* if no ctl-a in 4, send data anyway */
	spin_lock_irqsave(&flush_lock, flags);
	while (is_flushing && timeout) {
	prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);
	spin_unlock_irqrestore(&flush_lock, flags);
	timeout = schedule_timeout(timeout);
	spin_lock_irqsave(&flush_lock, flags);
	}
	finish_wait(&flush, &wait);
	is_flushing = 0;
	spin_unlock_irqrestore(&flush_lock, flags);

	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;
	}
	ch = synth_buffer_peek();
	set_current_state(TASK_INTERRUPTIBLE);
	delay_time_val = delay_time->u.n.value;
	synth_full_val = synth_full();
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	if (ch == '\n')
	ch = 0x0D;
	if (synth_full_val \|\| !synth->io_ops->synth_out(synth, ch)) {
	schedule_timeout(msecs_to_jiffies(delay_time_val));
	continue;
	}
	set_current_state(TASK_RUNNING);
	spin_lock_irqsave(&speakup_info.spinlock, flags);
	synth_buffer_getc();
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	if (ch == '[') {
	in_escape = 1;
	} else if (ch == ']') {
	in_escape = 0;
	} else if (ch <= SPACE) {
	if (!in_escape && strchr(",.!?;:", last))
	synth->io_ops->synth_out(synth, PROCSPEECH);
	if (time_after_eq(jiffies, jiff_max)) {
	if (!in_escape)
	synth->io_ops->synth_out(synth,
	PROCSPEECH);
	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;
	}
	}
	last = ch;
	}
	if (!in_escape)
	synth->io_ops->synth_out(synth, PROCSPEECH);
	}

	static void synth_flush(struct spk_synth *synth)
	{
	if (in_escape)
	/* if in command output ']' so we don't get an error */
	synth->io_ops->synth_out(synth, ']');
	in_escape = 0;
	is_flushing = 1;
	synth->io_ops->flush_buffer(synth);
	synth->io_ops->synth_out(synth, SYNTH_CLEAR);
	}

	module_param_named(ser, synth_dectlk.ser, int, 0444);
	module_param_named(dev, synth_dectlk.dev_name, charp, 0444);
	module_param_named(start, synth_dectlk.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(inflection, vars[INFLECTION_ID].u.n.default_val, int, 0444);
	module_param_named(vol, vars[VOL_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(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);



	MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
	MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
	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(inflection, "Set the inflection variable on load.");
	MODULE_PARM_DESC(vol, "Set the vol 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(direct, "Set the direct variable on load.");


	module_spk_synth(synth_dectlk);

	MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
	MODULE_AUTHOR("David Borowski");
	MODULE_DESCRIPTION("Speakup support for DECtalk Express synthesizers");
	MODULE_LICENSE("GPL");
	MODULE_VERSION(DRV_VERSION);