drivers/staging/speakup/synth.c

   1 #include <linux/types.h>
   2 #include <linux/ctype.h>        /* for isdigit() and friends */
   3 #include <linux/fs.h>
   4 #include <linux/mm.h>           /* for verify_area */
   5 #include <linux/errno.h>        /* for -EBUSY */
   6 #include <linux/ioport.h>       /* for check_region, request_region */
   7 #include <linux/interrupt.h>
   8 #include <linux/delay.h>        /* for loops_per_sec */
   9 #include <linux/kmod.h>
  10 #include <linux/jiffies.h>
  11 #include <linux/uaccess.h> /* for copy_from_user */
  12 #include <linux/sched.h>
  13 #include <linux/timer.h>
  14 #include <linux/kthread.h>
  15
  16 #include "spk_priv.h"
  17 #include "speakup.h"
  18 #include "serialio.h"
  19
  20 #define MAXSYNTHS       16      /* Max number of synths in array. */
  21 static struct spk_synth *synths[MAXSYNTHS];
  22 struct spk_synth *synth;
  23 char pitch_buff[32] = "";
  24 static int module_status;
  25 bool quiet_boot;
  26
  27 struct speakup_info_t speakup_info = {
  28         .spinlock = __SPIN_LOCK_UNLOCKED(speakup_info.spinlock),
  29         .flushing = 0,
  30 };
  31 EXPORT_SYMBOL_GPL(speakup_info);
  32
  33 static int do_synth_init(struct spk_synth *in_synth);
  34
  35 int serial_synth_probe(struct spk_synth *synth)
  36 {
  37         struct serial_state *ser;
  38         int failed = 0;
  39
  40         if ((synth->ser >= SPK_LO_TTY) && (synth->ser <= SPK_HI_TTY)) {
  41                 ser = spk_serial_init(synth->ser);
  42                 if (ser == NULL) {
  43                         failed = -1;
  44                 } else {
  45                         outb_p(0, ser->port);
  46                         mdelay(1);
  47                         outb_p('\r', ser->port);
  48                 }
  49         } else {
  50                 failed = -1;
  51                 pr_warn("ttyS%i is an invalid port\n", synth->ser);
  52         }
  53         if (failed) {
  54                 pr_info("%s: not found\n", synth->long_name);
  55                 return -ENODEV;
  56         }
  57         pr_info("%s: ttyS%i, Driver Version %s\n",
  58                         synth->long_name, synth->ser, synth->version);
  59         synth->alive = 1;
  60         return 0;
  61 }
  62 EXPORT_SYMBOL_GPL(serial_synth_probe);
  63
  64 /* Main loop of the progression thread: keep eating from the buffer
  65  * and push to the serial port, waiting as needed
  66  *
  67  * For devices that have a "full" notification mecanism, the driver can
  68  * adapt the loop the way they prefer.
  69  */
  70 void spk_do_catch_up(struct spk_synth *synth)
  71 {
  72         u_char ch;
  73         unsigned long flags;
  74         unsigned long jiff_max;
  75         struct var_t *delay_time;
  76         struct var_t *full_time;
  77         struct var_t *jiffy_delta;
  78         int jiffy_delta_val;
  79         int delay_time_val;
  80         int full_time_val;
  81
  82         jiffy_delta = get_var(JIFFY);
  83         full_time = get_var(FULL);
  84         delay_time = get_var(DELAY);
  85
  86         spk_lock(flags);
  87         jiffy_delta_val = jiffy_delta->u.n.value;
  88         spk_unlock(flags);
  89
  90         jiff_max = jiffies + jiffy_delta_val;
  91         while (!kthread_should_stop()) {
  92                 spk_lock(flags);
  93                 if (speakup_info.flushing) {
  94                         speakup_info.flushing = 0;
  95                         spk_unlock(flags);
  96                         synth->flush(synth);
  97                         continue;
  98                 }
  99                 if (synth_buffer_empty()) {
 100                         spk_unlock(flags);
 101                         break;
 102                 }
 103                 ch = synth_buffer_peek();
 104                 set_current_state(TASK_INTERRUPTIBLE);
 105                 full_time_val = full_time->u.n.value;
 106                 spk_unlock(flags);
 107                 if (ch == '\n')
 108                         ch = synth->procspeech;
 109                 if (!spk_serial_out(ch)) {
 110                         schedule_timeout(msecs_to_jiffies(full_time_val));
 111                         continue;
 112                 }
 113                 if ((jiffies >= jiff_max) && (ch == SPACE)) {
 114                         spk_lock(flags);
 115                         jiffy_delta_val = jiffy_delta->u.n.value;
 116                         delay_time_val = delay_time->u.n.value;
 117                         full_time_val = full_time->u.n.value;
 118                         spk_unlock(flags);
 119                         if (spk_serial_out(synth->procspeech))
 120                                 schedule_timeout(
 121                                         msecs_to_jiffies(delay_time_val));
 122                         else
 123                                 schedule_timeout(
 124                                         msecs_to_jiffies(full_time_val));
 125                         jiff_max = jiffies + jiffy_delta_val;
 126                 }
 127                 set_current_state(TASK_RUNNING);
 128                 spk_lock(flags);
 129                 synth_buffer_getc();
 130                 spk_unlock(flags);
 131         }
 132         spk_serial_out(synth->procspeech);
 133 }
 134 EXPORT_SYMBOL_GPL(spk_do_catch_up);
 135
 136 const char *spk_synth_immediate(struct spk_synth *synth, const char *buff)
 137 {
 138         u_char ch;
 139         while ((ch = *buff)) {
 140                 if (ch == '\n')
 141                         ch = synth->procspeech;
 142                 if (wait_for_xmitr())
 143                         outb(ch, speakup_info.port_tts);
 144                 else
 145                         return buff;
 146                 buff++;
 147         }
 148         return 0;
 149 }
 150 EXPORT_SYMBOL_GPL(spk_synth_immediate);
 151
 152 void spk_synth_flush(struct spk_synth *synth)
 153 {
 154         spk_serial_out(synth->clear);
 155 }
 156 EXPORT_SYMBOL_GPL(spk_synth_flush);
 157
 158 int spk_synth_is_alive_nop(struct spk_synth *synth)
 159 {
 160         synth->alive = 1;
 161         return 1;
 162 }
 163 EXPORT_SYMBOL_GPL(spk_synth_is_alive_nop);
 164
 165 int spk_synth_is_alive_restart(struct spk_synth *synth)
 166 {
 167         if (synth->alive)
 168                 return 1;
 169         if (!synth->alive && wait_for_xmitr() > 0) {
 170                 /* restart */
 171                 synth->alive = 1;
 172                 synth_printf("%s", synth->init);
 173                 return 2; /* reenabled */
 174         }
 175         pr_warn("%s: can't restart synth\n", synth->long_name);
 176         return 0;
 177 }
 178 EXPORT_SYMBOL_GPL(spk_synth_is_alive_restart);
 179
 180 static void thread_wake_up(u_long data)
 181 {
 182         wake_up_interruptible_all(&speakup_event);
 183 }
 184
 185 static DEFINE_TIMER(thread_timer, thread_wake_up, 0, 0);
 186
 187 void synth_start(void)
 188 {
 189         struct var_t *trigger_time;
 190
 191         if (!synth->alive) {
 192                 synth_buffer_clear();
 193                 return;
 194         }
 195         trigger_time = get_var(TRIGGER);
 196         if (!timer_pending(&thread_timer))
 197                 mod_timer(&thread_timer, jiffies +
 198                         msecs_to_jiffies(trigger_time->u.n.value));
 199 }
 200
 201 void do_flush(void)
 202 {
 203         speakup_info.flushing = 1;
 204         synth_buffer_clear();
 205         if (synth->alive) {
 206                 if (pitch_shift) {
 207                         synth_printf("%s", pitch_buff);
 208                         pitch_shift = 0;
 209                 }
 210         }
 211         wake_up_interruptible_all(&speakup_event);
 212         wake_up_process(speakup_task);
 213 }
 214
 215 void synth_write(const char *buf, size_t count)
 216 {
 217         while (count--)
 218                 synth_buffer_add(*buf++);
 219         synth_start();
 220 }
 221
 222 void synth_printf(const char *fmt, ...)
 223 {
 224         va_list args;
 225         unsigned char buf[160], *p;
 226         int r;
 227
 228         va_start(args, fmt);
 229         r = vsnprintf(buf, sizeof(buf), fmt, args);
 230         va_end(args);
 231         if (r > sizeof(buf) - 1)
 232                 r = sizeof(buf) - 1;
 233
 234         p = buf;
 235         while (r--)
 236                 synth_buffer_add(*p++);
 237         synth_start();
 238 }
 239 EXPORT_SYMBOL_GPL(synth_printf);
 240
 241 static int index_count;
 242 static int sentence_count;
 243
 244 void reset_index_count(int sc)
 245 {
 246         static int first = 1;
 247         if (first)
 248                 first = 0;
 249         else
 250                 synth->get_index();
 251         index_count = 0;
 252         sentence_count = sc;
 253 }
 254
 255 int synth_supports_indexing(void)
 256 {
 257         if (synth->get_index != NULL)
 258                 return 1;
 259         return 0;
 260 }
 261
 262 void synth_insert_next_index(int sent_num)
 263 {
 264         int out;
 265         if (synth->alive) {
 266                 if (sent_num == 0) {
 267                         synth->indexing.currindex++;
 268                         index_count++;
 269                         if (synth->indexing.currindex >
 270                                         synth->indexing.highindex)
 271                                 synth->indexing.currindex =
 272                                         synth->indexing.lowindex;
 273                 }
 274
 275                 out = synth->indexing.currindex * 10 + sent_num;
 276                 synth_printf(synth->indexing.command, out, out);
 277         }
 278 }
 279
 280 void get_index_count(int *linecount, int *sentcount)
 281 {
 282         int ind = synth->get_index();
 283         if (ind) {
 284                 sentence_count = ind % 10;
 285
 286                 if ((ind / 10) <= synth->indexing.currindex)
 287                         index_count = synth->indexing.currindex-(ind/10);
 288                 else
 289                         index_count = synth->indexing.currindex
 290                                 -synth->indexing.lowindex
 291                                 + synth->indexing.highindex-(ind/10)+1;
 292
 293         }
 294         *sentcount = sentence_count;
 295         *linecount = index_count;
 296 }
 297
 298 static struct resource synth_res;
 299
 300 int synth_request_region(unsigned long start, unsigned long n)
 301 {
 302         struct resource *parent = &ioport_resource;
 303         memset(&synth_res, 0, sizeof(synth_res));
 304         synth_res.name = synth->name;
 305         synth_res.start = start;
 306         synth_res.end = start + n - 1;
 307         synth_res.flags = IORESOURCE_BUSY;
 308         return request_resource(parent, &synth_res);
 309 }
 310 EXPORT_SYMBOL_GPL(synth_request_region);
 311
 312 int synth_release_region(unsigned long start, unsigned long n)
 313 {
 314         return release_resource(&synth_res);
 315 }
 316 EXPORT_SYMBOL_GPL(synth_release_region);
 317
 318 struct var_t synth_time_vars[] = {
 319         { DELAY, .u.n = {NULL, 100, 100, 2000, 0, 0, NULL } },
 320         { TRIGGER, .u.n = {NULL, 20, 10, 2000, 0, 0, NULL } },
 321         { JIFFY, .u.n = {NULL, 50, 20, 200, 0, 0, NULL } },
 322         { FULL, .u.n = {NULL, 400, 200, 60000, 0, 0, NULL } },
 323         V_LAST_VAR
 324 };
 325
 326 /* called by: speakup_init() */
 327 int synth_init(char *synth_name)
 328 {
 329         int i;
 330         int ret = 0;
 331         struct spk_synth *synth = NULL;
 332
 333         if (synth_name == NULL)
 334                 return 0;
 335
 336         if (strcmp(synth_name, "none") == 0) {
 337                 mutex_lock(&spk_mutex);
 338                 synth_release();
 339                 mutex_unlock(&spk_mutex);
 340                 return 0;
 341         }
 342
 343         mutex_lock(&spk_mutex);
 344         /* First, check if we already have it loaded. */
 345         for (i = 0; synths[i] != NULL && i < MAXSYNTHS; i++)
 346                 if (strcmp(synths[i]->name, synth_name) == 0)
 347                         synth = synths[i];
 348
 349         /* If we got one, initialize it now. */
 350         if (synth)
 351                 ret = do_synth_init(synth);
 352         else
 353                 ret = -ENODEV;
 354         mutex_unlock(&spk_mutex);
 355
 356         return ret;
 357 }
 358
 359 /* called by: synth_add() */
 360 static int do_synth_init(struct spk_synth *in_synth)
 361 {
 362         struct var_t *var;
 363
 364         synth_release();
 365         if (in_synth->checkval != SYNTH_CHECK)
 366                 return -EINVAL;
 367         synth = in_synth;
 368         synth->alive = 0;
 369         pr_warn("synth probe\n");
 370         if (synth->probe(synth) < 0) {
 371                 pr_warn("%s: device probe failed\n", in_synth->name);
 372                 synth = NULL;
 373                 return -ENODEV;
 374         }
 375         synth_time_vars[0].u.n.value =
 376                 synth_time_vars[0].u.n.default_val = synth->delay;
 377         synth_time_vars[1].u.n.value =
 378                 synth_time_vars[1].u.n.default_val = synth->trigger;
 379         synth_time_vars[2].u.n.value =
 380                 synth_time_vars[2].u.n.default_val = synth->jiffies;
 381         synth_time_vars[3].u.n.value =
 382                 synth_time_vars[3].u.n.default_val = synth->full;
 383         synth_printf("%s", synth->init);
 384         for (var = synth->vars;
 385                 (var->var_id >= 0) && (var->var_id < MAXVARS); var++)
 386                 speakup_register_var(var);
 387         if (!quiet_boot)
 388                 synth_printf("%s found\n", synth->long_name);
 389         if (synth->attributes.name
 390         && sysfs_create_group(speakup_kobj, &(synth->attributes)) < 0)
 391                 return -ENOMEM;
 392         synth_flags = synth->flags;
 393         wake_up_interruptible_all(&speakup_event);
 394         if (speakup_task)
 395                 wake_up_process(speakup_task);
 396         return 0;
 397 }
 398
 399 void synth_release(void)
 400 {
 401         struct var_t *var;
 402         unsigned long flags;
 403
 404         if (synth == NULL)
 405                 return;
 406         spk_lock(flags);
 407         pr_info("releasing synth %s\n", synth->name);
 408         synth->alive = 0;
 409         del_timer(&thread_timer);
 410         spk_unlock(flags);
 411         if (synth->attributes.name)
 412                 sysfs_remove_group(speakup_kobj, &(synth->attributes));
 413         for (var = synth->vars; var->var_id != MAXVARS; var++)
 414                 speakup_unregister_var(var->var_id);
 415         stop_serial_interrupt();
 416         synth->release();
 417         synth = NULL;
 418 }
 419
 420 /* called by: all_driver_init() */
 421 int synth_add(struct spk_synth *in_synth)
 422 {
 423         int i;
 424         int status = 0;
 425         mutex_lock(&spk_mutex);
 426         for (i = 0; synths[i] != NULL && i < MAXSYNTHS; i++)
 427                 /* synth_remove() is responsible for rotating the array down */
 428                 if (in_synth == synths[i]) {
 429                         mutex_unlock(&spk_mutex);
 430                         return 0;
 431                 }
 432         if (i == MAXSYNTHS) {
 433                 pr_warn("Error: attempting to add a synth past end of array\n");
 434                 mutex_unlock(&spk_mutex);
 435                 return -1;
 436         }
 437         synths[i++] = in_synth;
 438         synths[i] = NULL;
 439         if (in_synth->startup)
 440                 status = do_synth_init(in_synth);
 441         mutex_unlock(&spk_mutex);
 442         return status;
 443 }
 444 EXPORT_SYMBOL_GPL(synth_add);
 445
 446 void synth_remove(struct spk_synth *in_synth)
 447 {
 448         int i;
 449         mutex_lock(&spk_mutex);
 450         if (synth == in_synth)
 451                 synth_release();
 452         for (i = 0; synths[i] != NULL; i++) {
 453                 if (in_synth == synths[i])
 454                         break;
 455         }
 456         for ( ; synths[i] != NULL; i++) /* compress table */
 457                 synths[i] = synths[i+1];
 458         module_status = 0;
 459         mutex_unlock(&spk_mutex);
 460 }
 461 EXPORT_SYMBOL_GPL(synth_remove);
 462
 463 short punc_masks[] = { 0, SOME, MOST, PUNC, PUNC|B_SYM };