summaryrefslogtreecommitdiff
path: root/drivers/staging/speakup/synth.c
blob: a1ca68c765792cd73034bb41e0ca18725db50d04 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
#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"

#define MAXSYNTHS       16      /* Max number of synths in array. */
static struct spk_synth *synths[MAXSYNTHS + 1];
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.
 */
void spk_do_catch_up(struct spk_synth *synth)
{
	u_char 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;

	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;
		}
		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 (!synth->io_ops->synth_out(synth, ch)) {
			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);
}
EXPORT_SYMBOL_GPL(spk_do_catch_up);

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(u_long data)
{
	wake_up_interruptible_all(&speakup_event);
}

static DEFINE_TIMER(thread_timer, thread_wake_up, 0, 0);

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 i;
	int ret = 0;
	struct spk_synth *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. */
	for (i = 0; i < MAXSYNTHS && synths[i]; i++)
		if (strcmp(synths[i]->name, synth_name) == 0)
			synth = synths[i];

	/* 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 i;
	int status = 0;

	mutex_lock(&spk_mutex);
	for (i = 0; i < MAXSYNTHS && synths[i]; i++)
		/* synth_remove() is responsible for rotating the array down */
		if (in_synth == synths[i]) {
			mutex_unlock(&spk_mutex);
			return 0;
		}
	if (i == MAXSYNTHS) {
		pr_warn("Error: attempting to add a synth past end of array\n");
		mutex_unlock(&spk_mutex);
		return -1;
	}

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

	if (!status) {
		synths[i++] = in_synth;
		synths[i] = NULL;
	}

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

void synth_remove(struct spk_synth *in_synth)
{
	int i;

	mutex_lock(&spk_mutex);
	if (synth == in_synth)
		synth_release();
	for (i = 0; synths[i]; i++) {
		if (in_synth == synths[i])
			break;
	}
	for ( ; synths[i]; i++) /* compress table */
		synths[i] = synths[i + 1];
	module_status = 0;
	mutex_unlock(&spk_mutex);
}
EXPORT_SYMBOL_GPL(synth_remove);

short spk_punc_masks[] = { 0, SOME, MOST, PUNC, PUNC | B_SYM };