[linux-2.6-block.git] / drivers / staging / speakup / synth.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/ctype.h>	/* for isdigit() and friends */
#include <linux/fs.h>
#include <linux/mm.h>		/* for verify_area */
#include <linux/errno.h>	/* for -EBUSY */
#include <linux/ioport.h>	/* for check_region, request_region */
#include <linux/interrupt.h>
#include <linux/delay.h>	/* for loops_per_sec */
#include <linux/kmod.h>
#include <linux/jiffies.h>
#include <linux/uaccess.h>	/* for copy_from_user */
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/kthread.h>

#include "spk_priv.h"
#include "speakup.h"
#include "serialio.h"

static LIST_HEAD(synths);
struct spk_synth *synth;
char spk_pitch_buff[32] = "";
static int module_status;
bool spk_quiet_boot;

struct speakup_info_t speakup_info = {
	/*
	 * This spinlock is used to protect the entire speakup machinery, and
	 * must be taken at each kernel->speakup transition and released at
	 * each corresponding speakup->kernel transition.
	 *
	 * The progression thread only interferes with the speakup machinery
	 * through the synth buffer, so only needs to take the lock
	 * while tinkering with the buffer.
	 *
	 * We use spin_lock/trylock_irqsave and spin_unlock_irqrestore with this
	 * spinlock because speakup needs to disable the keyboard IRQ.
	 */
	.spinlock = __SPIN_LOCK_UNLOCKED(speakup_info.spinlock),
	.flushing = 0,
};
EXPORT_SYMBOL_GPL(speakup_info);

static int do_synth_init(struct spk_synth *in_synth);

/*
 * Main loop of the progression thread: keep eating from the buffer
 * and push to the serial port, waiting as needed
 *
 * For devices that have a "full" notification mechanism, the driver can
 * adapt the loop the way they prefer.
 */
static void _spk_do_catch_up(struct spk_synth *synth, int unicode)
{
	u16 ch;
	unsigned long flags;
	unsigned long jiff_max;
	struct var_t *delay_time;
	struct var_t *full_time;
	struct var_t *jiffy_delta;
	int jiffy_delta_val;
	int delay_time_val;
	int full_time_val;
	int ret;

	jiffy_delta = spk_get_var(JIFFY);
	full_time = spk_get_var(FULL);
	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;
		}
		if (!unicode)
			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);
		full_time_val = full_time->u.n.value;
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (ch == '\n')
			ch = synth->procspeech;
		if (unicode)
			ret = synth->io_ops->synth_out_unicode(synth, ch);
		else
			ret = synth->io_ops->synth_out(synth, ch);
		if (!ret) {
			schedule_timeout(msecs_to_jiffies(full_time_val));
			continue;
		}
		if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
			spin_lock_irqsave(&speakup_info.spinlock, flags);
			jiffy_delta_val = jiffy_delta->u.n.value;
			delay_time_val = delay_time->u.n.value;
			full_time_val = full_time->u.n.value;
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			if (synth->io_ops->synth_out(synth, synth->procspeech))
				schedule_timeout(
					msecs_to_jiffies(delay_time_val));
			else
				schedule_timeout(
					msecs_to_jiffies(full_time_val));
			jiff_max = jiffies + jiffy_delta_val;
		}
		set_current_state(TASK_RUNNING);
		spin_lock_irqsave(&speakup_info.spinlock, flags);
		synth_buffer_getc();
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	}
	synth->io_ops->synth_out(synth, synth->procspeech);
}

void spk_do_catch_up(struct spk_synth *synth)
{
	_spk_do_catch_up(synth, 0);
}
EXPORT_SYMBOL_GPL(spk_do_catch_up);

void spk_do_catch_up_unicode(struct spk_synth *synth)
{
	_spk_do_catch_up(synth, 1);
}
EXPORT_SYMBOL_GPL(spk_do_catch_up_unicode);

void spk_synth_flush(struct spk_synth *synth)
{
	synth->io_ops->flush_buffer();
	synth->io_ops->synth_out(synth, synth->clear);
}
EXPORT_SYMBOL_GPL(spk_synth_flush);

unsigned char spk_synth_get_index(struct spk_synth *synth)
{
	return synth->io_ops->synth_in_nowait();
}
EXPORT_SYMBOL_GPL(spk_synth_get_index);

int spk_synth_is_alive_nop(struct spk_synth *synth)
{
	synth->alive = 1;
	return 1;
}
EXPORT_SYMBOL_GPL(spk_synth_is_alive_nop);

int spk_synth_is_alive_restart(struct spk_synth *synth)
{
	if (synth->alive)
		return 1;
	if (spk_wait_for_xmitr(synth) > 0) {
		/* restart */
		synth->alive = 1;
		synth_printf("%s", synth->init);
		return 2; /* reenabled */
	}
	pr_warn("%s: can't restart synth\n", synth->long_name);
	return 0;
}
EXPORT_SYMBOL_GPL(spk_synth_is_alive_restart);

static void thread_wake_up(struct timer_list *unused)
{
	wake_up_interruptible_all(&speakup_event);
}

static DEFINE_TIMER(thread_timer, thread_wake_up);

void synth_start(void)
{
	struct var_t *trigger_time;

	if (!synth->alive) {
		synth_buffer_clear();
		return;
	}
	trigger_time = spk_get_var(TRIGGER);
	if (!timer_pending(&thread_timer))
		mod_timer(&thread_timer, jiffies +
			msecs_to_jiffies(trigger_time->u.n.value));
}

void spk_do_flush(void)
{
	if (!synth)
		return;

	speakup_info.flushing = 1;
	synth_buffer_clear();
	if (synth->alive) {
		if (spk_pitch_shift) {
			synth_printf("%s", spk_pitch_buff);
			spk_pitch_shift = 0;
		}
	}
	wake_up_interruptible_all(&speakup_event);
	wake_up_process(speakup_task);
}

void synth_write(const char *buf, size_t count)
{
	while (count--)
		synth_buffer_add(*buf++);
	synth_start();
}

void synth_printf(const char *fmt, ...)
{
	va_list args;
	unsigned char buf[160], *p;
	int r;

	va_start(args, fmt);
	r = vsnprintf(buf, sizeof(buf), fmt, args);
	va_end(args);
	if (r > sizeof(buf) - 1)
		r = sizeof(buf) - 1;

	p = buf;
	while (r--)
		synth_buffer_add(*p++);
	synth_start();
}
EXPORT_SYMBOL_GPL(synth_printf);

void synth_putwc(u16 wc)
{
	synth_buffer_add(wc);
}
EXPORT_SYMBOL_GPL(synth_putwc);

void synth_putwc_s(u16 wc)
{
	synth_buffer_add(wc);
	synth_start();
}
EXPORT_SYMBOL_GPL(synth_putwc_s);

void synth_putws(const u16 *buf)
{
	const u16 *p;

	for (p = buf; *p; p++)
		synth_buffer_add(*p);
}
EXPORT_SYMBOL_GPL(synth_putws);

void synth_putws_s(const u16 *buf)
{
	synth_putws(buf);
	synth_start();
}
EXPORT_SYMBOL_GPL(synth_putws_s);

static int index_count;
static int sentence_count;

void spk_reset_index_count(int sc)
{
	static int first = 1;

	if (first)
		first = 0;
	else
		synth->get_index(synth);
	index_count = 0;
	sentence_count = sc;
}

int synth_supports_indexing(void)
{
	if (synth->get_index)
		return 1;
	return 0;
}

void synth_insert_next_index(int sent_num)
{
	int out;

	if (synth->alive) {
		if (sent_num == 0) {
			synth->indexing.currindex++;
			index_count++;
			if (synth->indexing.currindex >
					synth->indexing.highindex)
				synth->indexing.currindex =
					synth->indexing.lowindex;
		}

		out = synth->indexing.currindex * 10 + sent_num;
		synth_printf(synth->indexing.command, out, out);
	}
}

void spk_get_index_count(int *linecount, int *sentcount)
{
	int ind = synth->get_index(synth);

	if (ind) {
		sentence_count = ind % 10;

		if ((ind / 10) <= synth->indexing.currindex)
			index_count = synth->indexing.currindex - (ind / 10);
		else
			index_count = synth->indexing.currindex
				- synth->indexing.lowindex
				+ synth->indexing.highindex - (ind / 10) + 1;
	}
	*sentcount = sentence_count;
	*linecount = index_count;
}

static struct resource synth_res;

int synth_request_region(unsigned long start, unsigned long n)
{
	struct resource *parent = &ioport_resource;

	memset(&synth_res, 0, sizeof(synth_res));
	synth_res.name = synth->name;
	synth_res.start = start;
	synth_res.end = start + n - 1;
	synth_res.flags = IORESOURCE_BUSY;
	return request_resource(parent, &synth_res);
}
EXPORT_SYMBOL_GPL(synth_request_region);

int synth_release_region(unsigned long start, unsigned long n)
{
	return release_resource(&synth_res);
}
EXPORT_SYMBOL_GPL(synth_release_region);

struct var_t synth_time_vars[] = {
	{ DELAY, .u.n = {NULL, 100, 100, 2000, 0, 0, NULL } },
	{ TRIGGER, .u.n = {NULL, 20, 10, 2000, 0, 0, NULL } },
	{ JIFFY, .u.n = {NULL, 50, 20, 200, 0, 0, NULL } },
	{ FULL, .u.n = {NULL, 400, 200, 60000, 0, 0, NULL } },
	V_LAST_VAR
};

/* called by: speakup_init() */
int synth_init(char *synth_name)
{
	int ret = 0;
	struct spk_synth *tmp, *synth = NULL;

	if (!synth_name)
		return 0;

	if (strcmp(synth_name, "none") == 0) {
		mutex_lock(&spk_mutex);
		synth_release();
		mutex_unlock(&spk_mutex);
		return 0;
	}

	mutex_lock(&spk_mutex);
	/* First, check if we already have it loaded. */
	list_for_each_entry(tmp, &synths, node) {
		if (strcmp(tmp->name, synth_name) == 0)
			synth = tmp;
	}

	/* If we got one, initialize it now. */
	if (synth)
		ret = do_synth_init(synth);
	else
		ret = -ENODEV;
	mutex_unlock(&spk_mutex);

	return ret;
}

/* called by: synth_add() */
static int do_synth_init(struct spk_synth *in_synth)
{
	struct var_t *var;

	synth_release();
	if (in_synth->checkval != SYNTH_CHECK)
		return -EINVAL;
	synth = in_synth;
	synth->alive = 0;
	pr_warn("synth probe\n");
	if (synth->probe(synth) < 0) {
		pr_warn("%s: device probe failed\n", in_synth->name);
		synth = NULL;
		return -ENODEV;
	}
	synth_time_vars[0].u.n.value =
		synth_time_vars[0].u.n.default_val = synth->delay;
	synth_time_vars[1].u.n.value =
		synth_time_vars[1].u.n.default_val = synth->trigger;
	synth_time_vars[2].u.n.value =
		synth_time_vars[2].u.n.default_val = synth->jiffies;
	synth_time_vars[3].u.n.value =
		synth_time_vars[3].u.n.default_val = synth->full;
	synth_printf("%s", synth->init);
	for (var = synth->vars;
		(var->var_id >= 0) && (var->var_id < MAXVARS); var++)
		speakup_register_var(var);
	if (!spk_quiet_boot)
		synth_printf("%s found\n", synth->long_name);
	if (synth->attributes.name &&
	    sysfs_create_group(speakup_kobj, &synth->attributes) < 0)
		return -ENOMEM;
	synth_flags = synth->flags;
	wake_up_interruptible_all(&speakup_event);
	if (speakup_task)
		wake_up_process(speakup_task);
	return 0;
}

void synth_release(void)
{
	struct var_t *var;
	unsigned long flags;

	if (!synth)
		return;
	spin_lock_irqsave(&speakup_info.spinlock, flags);
	pr_info("releasing synth %s\n", synth->name);
	synth->alive = 0;
	del_timer(&thread_timer);
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	if (synth->attributes.name)
		sysfs_remove_group(speakup_kobj, &synth->attributes);
	for (var = synth->vars; var->var_id != MAXVARS; var++)
		speakup_unregister_var(var->var_id);
	synth->release();
	synth = NULL;
}

/* called by: all_driver_init() */
int synth_add(struct spk_synth *in_synth)
{
	int status = 0;
	struct spk_synth *tmp;

	mutex_lock(&spk_mutex);

	list_for_each_entry(tmp, &synths, node) {
		if (tmp == in_synth) {
			mutex_unlock(&spk_mutex);
			return 0;
		}
	}

	if (in_synth->startup)
		status = do_synth_init(in_synth);

	if (!status)
		list_add_tail(&in_synth->node, &synths);

	mutex_unlock(&spk_mutex);
	return status;
}
EXPORT_SYMBOL_GPL(synth_add);

void synth_remove(struct spk_synth *in_synth)
{
	mutex_lock(&spk_mutex);
	if (synth == in_synth)
		synth_release();
	list_del(&in_synth->node);
	module_status = 0;
	mutex_unlock(&spk_mutex);
}
EXPORT_SYMBOL_GPL(synth_remove);

struct spk_synth *synth_current(void)
{
	return synth;
}
EXPORT_SYMBOL_GPL(synth_current);

short spk_punc_masks[] = { 0, SOME, MOST, PUNC, PUNC | B_SYM };
Commit	Line	Data
64969228	1	// SPDX-License-Identifier: GPL-2.0
c6e3fd22 WH	2	#include <linux/types.h>
	3	#include <linux/ctype.h> /* for isdigit() and friends */
	4	#include <linux/fs.h>
	5	#include <linux/mm.h> /* for verify_area */
	6	#include <linux/errno.h> /* for -EBUSY */
	7	#include <linux/ioport.h> /* for check_region, request_region */
	8	#include <linux/interrupt.h>
	9	#include <linux/delay.h> /* for loops_per_sec */
	10	#include <linux/kmod.h>
	11	#include <linux/jiffies.h>
d2ad9a82	12	#include <linux/uaccess.h> /* for copy_from_user */
c6e3fd22 WH	13	#include <linux/sched.h>
	14	#include <linux/timer.h>
	15	#include <linux/kthread.h>
	16
	17	#include "spk_priv.h"
	18	#include "speakup.h"
	19	#include "serialio.h"
	20
456aec73	21	static LIST_HEAD(synths);
1e560261	22	struct spk_synth *synth;
ca2beaf8	23	char spk_pitch_buff[32] = "";
c6e3fd22	24	static int module_status;
ca2beaf8	25	bool spk_quiet_boot;
c6e3fd22 WH	26
c6e3fd22 WH	27	struct speakup_info_t speakup_info = {
667b6141 WH	28	/*
	29	* This spinlock is used to protect the entire speakup machinery, and
	30	* must be taken at each kernel->speakup transition and released at
	31	* each corresponding speakup->kernel transition.
	32	*
05719ac7 PN	33	* The progression thread only interferes with the speakup machinery
	34	* through the synth buffer, so only needs to take the lock
	35	* while tinkering with the buffer.
667b6141 WH	36	*
	37	* We use spin_lock/trylock_irqsave and spin_unlock_irqrestore with this
	38	* spinlock because speakup needs to disable the keyboard IRQ.
	39	*/
1e560261	40	.spinlock = __SPIN_LOCK_UNLOCKED(speakup_info.spinlock),
c6e3fd22 WH	41	.flushing = 0,
	42	};
	43	EXPORT_SYMBOL_GPL(speakup_info);
	44
	45	static int do_synth_init(struct spk_synth *in_synth);
	46
d2ad9a82 WF	47	/*
d2ad9a82 WF	48	* Main loop of the progression thread: keep eating from the buffer
c6e3fd22 WH	49	* and push to the serial port, waiting as needed
c6e3fd22 WH	50	*
83414d52	51	* For devices that have a "full" notification mechanism, the driver can
c6e3fd22 WH	52	* adapt the loop the way they prefer.
c6e3fd22 WH	53	*/
65fa72d3	54	static void _spk_do_catch_up(struct spk_synth *synth, int unicode)
c6e3fd22	55	{
65fa72d3	56	u16 ch;
c6e3fd22 WH	57	unsigned long flags;
	58	unsigned long jiff_max;
	59	struct var_t *delay_time;
	60	struct var_t *full_time;
	61	struct var_t *jiffy_delta;
	62	int jiffy_delta_val;
	63	int delay_time_val;
	64	int full_time_val;
65fa72d3	65	int ret;
c6e3fd22	66
ca2beaf8 ST	67	jiffy_delta = spk_get_var(JIFFY);
	68	full_time = spk_get_var(FULL);
	69	delay_time = spk_get_var(DELAY);
c6e3fd22	70
6697330a	71	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22	72	jiffy_delta_val = jiffy_delta->u.n.value;
6697330a	73	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	74
	75	jiff_max = jiffies + jiffy_delta_val;
	76	while (!kthread_should_stop()) {
6697330a	77	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22 WH	78	if (speakup_info.flushing) {
c6e3fd22 WH	79	speakup_info.flushing = 0;
6697330a	80	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	81	synth->flush(synth);
	82	continue;
	83	}
65fa72d3 ST	84	if (!unicode)
65fa72d3 ST	85	synth_buffer_skip_nonlatin1();
c6e3fd22	86	if (synth_buffer_empty()) {
6697330a	87	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	88	break;
	89	}
	90	ch = synth_buffer_peek();
	91	set_current_state(TASK_INTERRUPTIBLE);
	92	full_time_val = full_time->u.n.value;
6697330a	93	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	94	if (ch == '\n')
c6e3fd22 WH	95	ch = synth->procspeech;
65fa72d3 ST	96	if (unicode)
	97	ret = synth->io_ops->synth_out_unicode(synth, ch);
	98	else
	99	ret = synth->io_ops->synth_out(synth, ch);
	100	if (!ret) {
c6e3fd22 WH	101	schedule_timeout(msecs_to_jiffies(full_time_val));
	102	continue;
	103	}
89021ecc	104	if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
6697330a	105	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22 WH	106	jiffy_delta_val = jiffy_delta->u.n.value;
	107	delay_time_val = delay_time->u.n.value;
	108	full_time_val = full_time->u.n.value;
6697330a	109	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
1e441594	110	if (synth->io_ops->synth_out(synth, synth->procspeech))
1e560261 WH	111	schedule_timeout(
1e560261 WH	112	msecs_to_jiffies(delay_time_val));
c6e3fd22	113	else
1e560261 WH	114	schedule_timeout(
1e560261 WH	115	msecs_to_jiffies(full_time_val));
c6e3fd22 WH	116	jiff_max = jiffies + jiffy_delta_val;
	117	}
	118	set_current_state(TASK_RUNNING);
6697330a	119	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22	120	synth_buffer_getc();
6697330a	121	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22	122	}
1e441594	123	synth->io_ops->synth_out(synth, synth->procspeech);
c6e3fd22	124	}
65fa72d3 ST	125
	126	void spk_do_catch_up(struct spk_synth *synth)
	127	{
	128	_spk_do_catch_up(synth, 0);
	129	}
c6e3fd22 WH	130	EXPORT_SYMBOL_GPL(spk_do_catch_up);
c6e3fd22 WH	131
65fa72d3 ST	132	void spk_do_catch_up_unicode(struct spk_synth *synth)
	133	{
	134	_spk_do_catch_up(synth, 1);
	135	}
	136	EXPORT_SYMBOL_GPL(spk_do_catch_up_unicode);
	137
c6e3fd22 WH	138	void spk_synth_flush(struct spk_synth *synth)
c6e3fd22 WH	139	{
1c597367	140	synth->io_ops->flush_buffer();
1e441594	141	synth->io_ops->synth_out(synth, synth->clear);
c6e3fd22 WH	142	}
	143	EXPORT_SYMBOL_GPL(spk_synth_flush);
	144
ca693dcd OK	145	unsigned char spk_synth_get_index(struct spk_synth *synth)
	146	{
	147	return synth->io_ops->synth_in_nowait();
	148	}
	149	EXPORT_SYMBOL_GPL(spk_synth_get_index);
	150
c6e3fd22 WH	151	int spk_synth_is_alive_nop(struct spk_synth *synth)
	152	{
	153	synth->alive = 1;
	154	return 1;
	155	}
	156	EXPORT_SYMBOL_GPL(spk_synth_is_alive_nop);
	157
	158	int spk_synth_is_alive_restart(struct spk_synth *synth)
	159	{
	160	if (synth->alive)
	161	return 1;
9176d156	162	if (spk_wait_for_xmitr(synth) > 0) {
c6e3fd22 WH	163	/* restart */
	164	synth->alive = 1;
	165	synth_printf("%s", synth->init);
	166	return 2; /* reenabled */
	167	}
	168	pr_warn("%s: can't restart synth\n", synth->long_name);
	169	return 0;
	170	}
	171	EXPORT_SYMBOL_GPL(spk_synth_is_alive_restart);
	172
24ed960a	173	static void thread_wake_up(struct timer_list *unused)
c6e3fd22 WH	174	{
	175	wake_up_interruptible_all(&speakup_event);
	176	}
	177
1d27e3e2	178	static DEFINE_TIMER(thread_timer, thread_wake_up);
c6e3fd22 WH	179
	180	void synth_start(void)
	181	{
	182	struct var_t *trigger_time;
	183
	184	if (!synth->alive) {
	185	synth_buffer_clear();
	186	return;
	187	}
ca2beaf8	188	trigger_time = spk_get_var(TRIGGER);
c6e3fd22	189	if (!timer_pending(&thread_timer))
1e560261 WH	190	mod_timer(&thread_timer, jiffies +
1e560261 WH	191	msecs_to_jiffies(trigger_time->u.n.value));
c6e3fd22 WH	192	}
c6e3fd22 WH	193
ca2beaf8	194	void spk_do_flush(void)
c6e3fd22	195	{
8b9c012a SL	196	if (!synth)
	197	return;
	198
c6e3fd22 WH	199	speakup_info.flushing = 1;
	200	synth_buffer_clear();
	201	if (synth->alive) {
ca2beaf8 ST	202	if (spk_pitch_shift) {
	203	synth_printf("%s", spk_pitch_buff);
	204	spk_pitch_shift = 0;
c6e3fd22 WH	205	}
	206	}
	207	wake_up_interruptible_all(&speakup_event);
	208	wake_up_process(speakup_task);
	209	}
	210
	211	void synth_write(const char *buf, size_t count)
	212	{
	213	while (count--)
	214	synth_buffer_add(*buf++);
	215	synth_start();
	216	}
	217
	218	void synth_printf(const char *fmt, ...)
	219	{
	220	va_list args;
	221	unsigned char buf[160], *p;
	222	int r;
	223
	224	va_start(args, fmt);
	225	r = vsnprintf(buf, sizeof(buf), fmt, args);
	226	va_end(args);
	227	if (r > sizeof(buf) - 1)
	228	r = sizeof(buf) - 1;
	229
	230	p = buf;
	231	while (r--)
	232	synth_buffer_add(*p++);
	233	synth_start();
	234	}
	235	EXPORT_SYMBOL_GPL(synth_printf);
	236
89fc2ae8 ST	237	void synth_putwc(u16 wc)
	238	{
	239	synth_buffer_add(wc);
	240	}
	241	EXPORT_SYMBOL_GPL(synth_putwc);
	242
	243	void synth_putwc_s(u16 wc)
	244	{
	245	synth_buffer_add(wc);
	246	synth_start();
	247	}
	248	EXPORT_SYMBOL_GPL(synth_putwc_s);
	249
	250	void synth_putws(const u16 *buf)
	251	{
	252	const u16 *p;
	253
	254	for (p = buf; *p; p++)
	255	synth_buffer_add(*p);
	256	}
	257	EXPORT_SYMBOL_GPL(synth_putws);
	258
	259	void synth_putws_s(const u16 *buf)
	260	{
	261	synth_putws(buf);
	262	synth_start();
	263	}
	264	EXPORT_SYMBOL_GPL(synth_putws_s);
	265
1e560261 WH	266	static int index_count;
1e560261 WH	267	static int sentence_count;
c6e3fd22	268
ca2beaf8	269	void spk_reset_index_count(int sc)
c6e3fd22 WH	270	{
c6e3fd22 WH	271	static int first = 1;
8e69a811	272
c6e3fd22 WH	273	if (first)
	274	first = 0;
	275	else
ca693dcd	276	synth->get_index(synth);
c6e3fd22 WH	277	index_count = 0;
	278	sentence_count = sc;
	279	}
	280
	281	int synth_supports_indexing(void)
	282	{
2ffb795f	283	if (synth->get_index)
c6e3fd22 WH	284	return 1;
	285	return 0;
	286	}
	287
	288	void synth_insert_next_index(int sent_num)
	289	{
	290	int out;
8e69a811	291
c6e3fd22 WH	292	if (synth->alive) {
	293	if (sent_num == 0) {
	294	synth->indexing.currindex++;
	295	index_count++;
	296	if (synth->indexing.currindex >
	297	synth->indexing.highindex)
	298	synth->indexing.currindex =
	299	synth->indexing.lowindex;
	300	}
	301
	302	out = synth->indexing.currindex * 10 + sent_num;
	303	synth_printf(synth->indexing.command, out, out);
	304	}
	305	}
	306
ca2beaf8	307	void spk_get_index_count(int linecount, int sentcount)
c6e3fd22	308	{
ca693dcd	309	int ind = synth->get_index(synth);
8e69a811	310
c6e3fd22 WH	311	if (ind) {
	312	sentence_count = ind % 10;
	313
	314	if ((ind / 10) <= synth->indexing.currindex)
c67095ce	315	index_count = synth->indexing.currindex - (ind / 10);
c6e3fd22	316	else
1e560261	317	index_count = synth->indexing.currindex
c67095ce WF	318	- synth->indexing.lowindex
c67095ce WF	319	+ synth->indexing.highindex - (ind / 10) + 1;
c6e3fd22 WH	320	}
	321	*sentcount = sentence_count;
	322	*linecount = index_count;
	323	}
	324
	325	static struct resource synth_res;
	326
	327	int synth_request_region(unsigned long start, unsigned long n)
	328	{
	329	struct resource *parent = &ioport_resource;
8e69a811	330
c6e3fd22 WH	331	memset(&synth_res, 0, sizeof(synth_res));
	332	synth_res.name = synth->name;
	333	synth_res.start = start;
	334	synth_res.end = start + n - 1;
	335	synth_res.flags = IORESOURCE_BUSY;
	336	return request_resource(parent, &synth_res);
	337	}
	338	EXPORT_SYMBOL_GPL(synth_request_region);
	339
	340	int synth_release_region(unsigned long start, unsigned long n)
	341	{
	342	return release_resource(&synth_res);
	343	}
	344	EXPORT_SYMBOL_GPL(synth_release_region);
	345
	346	struct var_t synth_time_vars[] = {
1e560261 WH	347	{ DELAY, .u.n = {NULL, 100, 100, 2000, 0, 0, NULL } },
	348	{ TRIGGER, .u.n = {NULL, 20, 10, 2000, 0, 0, NULL } },
	349	{ JIFFY, .u.n = {NULL, 50, 20, 200, 0, 0, NULL } },
	350	{ FULL, .u.n = {NULL, 400, 200, 60000, 0, 0, NULL } },
c6e3fd22 WH	351	V_LAST_VAR
	352	};
	353
	354	/* called by: speakup_init() */
	355	int synth_init(char *synth_name)
	356	{
c6e3fd22	357	int ret = 0;
456aec73	358	struct spk_synth tmp, synth = NULL;
c6e3fd22	359
2ffb795f	360	if (!synth_name)
c6e3fd22 WH	361	return 0;
	362
	363	if (strcmp(synth_name, "none") == 0) {
	364	mutex_lock(&spk_mutex);
	365	synth_release();
	366	mutex_unlock(&spk_mutex);
	367	return 0;
	368	}
	369
	370	mutex_lock(&spk_mutex);
	371	/* First, check if we already have it loaded. */
456aec73 JS	372	list_for_each_entry(tmp, &synths, node) {
	373	if (strcmp(tmp->name, synth_name) == 0)
	374	synth = tmp;
	375	}
c6e3fd22 WH	376
	377	/* If we got one, initialize it now. */
	378	if (synth)
	379	ret = do_synth_init(synth);
	380	else
	381	ret = -ENODEV;
	382	mutex_unlock(&spk_mutex);
	383
	384	return ret;
	385	}
	386
	387	/* called by: synth_add() */
	388	static int do_synth_init(struct spk_synth *in_synth)
	389	{
	390	struct var_t *var;
	391
	392	synth_release();
	393	if (in_synth->checkval != SYNTH_CHECK)
	394	return -EINVAL;
	395	synth = in_synth;
	396	synth->alive = 0;
	397	pr_warn("synth probe\n");
	398	if (synth->probe(synth) < 0) {
	399	pr_warn("%s: device probe failed\n", in_synth->name);
	400	synth = NULL;
	401	return -ENODEV;
	402	}
	403	synth_time_vars[0].u.n.value =
	404	synth_time_vars[0].u.n.default_val = synth->delay;
	405	synth_time_vars[1].u.n.value =
	406	synth_time_vars[1].u.n.default_val = synth->trigger;
	407	synth_time_vars[2].u.n.value =
	408	synth_time_vars[2].u.n.default_val = synth->jiffies;
	409	synth_time_vars[3].u.n.value =
	410	synth_time_vars[3].u.n.default_val = synth->full;
	411	synth_printf("%s", synth->init);
1e560261 WH	412	for (var = synth->vars;
1e560261 WH	413	(var->var_id >= 0) && (var->var_id < MAXVARS); var++)
c6e3fd22	414	speakup_register_var(var);
ca2beaf8	415	if (!spk_quiet_boot)
c6e3fd22	416	synth_printf("%s found\n", synth->long_name);
904cf12d OH	417	if (synth->attributes.name &&
904cf12d OH	418	sysfs_create_group(speakup_kobj, &synth->attributes) < 0)
c6e3fd22 WH	419	return -ENOMEM;
	420	synth_flags = synth->flags;
	421	wake_up_interruptible_all(&speakup_event);
	422	if (speakup_task)
	423	wake_up_process(speakup_task);
	424	return 0;
	425	}
	426
	427	void synth_release(void)
	428	{
	429	struct var_t *var;
	430	unsigned long flags;
	431
2ffb795f	432	if (!synth)
c6e3fd22	433	return;
6697330a	434	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22 WH	435	pr_info("releasing synth %s\n", synth->name);
	436	synth->alive = 0;
	437	del_timer(&thread_timer);
6697330a	438	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22	439	if (synth->attributes.name)
3adc4aae	440	sysfs_remove_group(speakup_kobj, &synth->attributes);
c6e3fd22 WH	441	for (var = synth->vars; var->var_id != MAXVARS; var++)
c6e3fd22 WH	442	speakup_unregister_var(var->var_id);
c6e3fd22 WH	443	synth->release();
	444	synth = NULL;
	445	}
	446
	447	/* called by: all_driver_init() */
	448	int synth_add(struct spk_synth *in_synth)
	449	{
c6e3fd22	450	int status = 0;
456aec73	451	struct spk_synth *tmp;
8e69a811	452
c6e3fd22	453	mutex_lock(&spk_mutex);
456aec73 JS	454
	455	list_for_each_entry(tmp, &synths, node) {
	456	if (tmp == in_synth) {
c6e3fd22 WH	457	mutex_unlock(&spk_mutex);
	458	return 0;
	459	}
c6e3fd22	460	}
e4dd8bca	461
c6e3fd22 WH	462	if (in_synth->startup)
c6e3fd22 WH	463	status = do_synth_init(in_synth);
e4dd8bca	464
456aec73 JS	465	if (!status)
456aec73 JS	466	list_add_tail(&in_synth->node, &synths);
e4dd8bca	467
c6e3fd22 WH	468	mutex_unlock(&spk_mutex);
	469	return status;
	470	}
	471	EXPORT_SYMBOL_GPL(synth_add);
	472
	473	void synth_remove(struct spk_synth *in_synth)
	474	{
c6e3fd22 WH	475	mutex_lock(&spk_mutex);
	476	if (synth == in_synth)
	477	synth_release();
456aec73	478	list_del(&in_synth->node);
c6e3fd22 WH	479	module_status = 0;
	480	mutex_unlock(&spk_mutex);
	481	}
	482	EXPORT_SYMBOL_GPL(synth_remove);
	483
45ac7b31 ST	484	struct spk_synth *synth_current(void)
	485	{
	486	return synth;
	487	}
	488	EXPORT_SYMBOL_GPL(synth_current);
	489
c67095ce	490	short spk_punc_masks[] = { 0, SOME, MOST, PUNC, PUNC \| B_SYM };