drivers/staging/speakup/speakup_dtlk.c

   1 /*
   2  * originally written by: Kirk Reiser <kirk@braille.uwo.ca>
   3 * this version considerably modified by David Borowski, david575@rogers.com
   4  *
   5  * Copyright (C) 1998-99  Kirk Reiser.
   6  * Copyright (C) 2003 David Borowski.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * specificly written as a driver for the speakup screenreview
  23  * package it's not a general device driver.
  24  * This driver is for the RC Systems DoubleTalk PC internal synthesizer.
  25  */
  26 #include <linux/jiffies.h>
  27 #include <linux/sched.h>
  28 #include <linux/timer.h>
  29 #include <linux/kthread.h>
  30
  31 #include "spk_priv.h"
  32 #include "serialio.h"
  33 #include "speakup_dtlk.h" /* local header file for DoubleTalk values */
  34 #include "speakup.h"
  35
  36 #define DRV_VERSION "2.10"
  37 #define PROCSPEECH 0x00
  38
  39 static int synth_probe(struct spk_synth *synth);
  40 static void dtlk_release(void);
  41 static const char *synth_immediate(struct spk_synth *synth, const char *buf);
  42 static void do_catch_up(struct spk_synth *synth);
  43 static void synth_flush(struct spk_synth *synth);
  44
  45 static int synth_lpc;
  46 static int port_forced;
  47 static unsigned int synth_portlist[] = {
  48                  0x25e, 0x29e, 0x2de, 0x31e, 0x35e, 0x39e, 0
  49 };
  50 static u_char synth_status;
  51
  52 static struct var_t vars[] = {
  53         { CAPS_START, .u.s = {"\x01+35p" } },
  54         { CAPS_STOP, .u.s = {"\x01-35p" } },
  55         { RATE, .u.n = {"\x01%ds", 8, 0, 9, 0, 0, NULL } },
  56         { PITCH, .u.n = {"\x01%dp", 50, 0, 99, 0, 0, NULL } },
  57         { VOL, .u.n = {"\x01%dv", 5, 0, 9, 0, 0, NULL } },
  58         { TONE, .u.n = {"\x01%dx", 1, 0, 2, 0, 0, NULL } },
  59         { PUNCT, .u.n = {"\x01%db", 7, 0, 15, 0, 0, NULL } },
  60         { VOICE, .u.n = {"\x01%do", 0, 0, 7, 0, 0, NULL } },
  61         { FREQUENCY, .u.n = {"\x01%df", 5, 0, 9, 0, 0, NULL } },
  62         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  63         V_LAST_VAR
  64 };
  65
  66 /*
  67  * These attributes will appear in /sys/accessibility/speakup/dtlk.
  68  */
  69 static struct kobj_attribute caps_start_attribute =
  70         __ATTR(caps_start, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  71 static struct kobj_attribute caps_stop_attribute =
  72         __ATTR(caps_stop, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  73 static struct kobj_attribute freq_attribute =
  74         __ATTR(freq, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  75 static struct kobj_attribute pitch_attribute =
  76         __ATTR(pitch, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  77 static struct kobj_attribute punct_attribute =
  78         __ATTR(punct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  79 static struct kobj_attribute rate_attribute =
  80         __ATTR(rate, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  81 static struct kobj_attribute tone_attribute =
  82         __ATTR(tone, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  83 static struct kobj_attribute voice_attribute =
  84         __ATTR(voice, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  85 static struct kobj_attribute vol_attribute =
  86         __ATTR(vol, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  87
  88 static struct kobj_attribute delay_time_attribute =
  89         __ATTR(delay_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  90 static struct kobj_attribute direct_attribute =
  91         __ATTR(direct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  92 static struct kobj_attribute full_time_attribute =
  93         __ATTR(full_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  94 static struct kobj_attribute jiffy_delta_attribute =
  95         __ATTR(jiffy_delta, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  96 static struct kobj_attribute trigger_time_attribute =
  97         __ATTR(trigger_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  98
  99 /*
 100  * Create a group of attributes so that we can create and destroy them all
 101  * at once.
 102  */
 103 static struct attribute *synth_attrs[] = {
 104         &caps_start_attribute.attr,
 105         &caps_stop_attribute.attr,
 106         &freq_attribute.attr,
 107         &pitch_attribute.attr,
 108         &punct_attribute.attr,
 109         &rate_attribute.attr,
 110         &tone_attribute.attr,
 111         &voice_attribute.attr,
 112         &vol_attribute.attr,
 113         &delay_time_attribute.attr,
 114         &direct_attribute.attr,
 115         &full_time_attribute.attr,
 116         &jiffy_delta_attribute.attr,
 117         &trigger_time_attribute.attr,
 118         NULL,   /* need to NULL terminate the list of attributes */
 119 };
 120
 121 static struct spk_synth synth_dtlk = {
 122         .name = "dtlk",
 123         .version = DRV_VERSION,
 124         .long_name = "DoubleTalk PC",
 125         .init = "\x01@\x01\x31y",
 126         .procspeech = PROCSPEECH,
 127         .clear = SYNTH_CLEAR,
 128         .delay = 500,
 129         .trigger = 30,
 130         .jiffies = 50,
 131         .full = 1000,
 132         .startup = SYNTH_START,
 133         .checkval = SYNTH_CHECK,
 134         .vars = vars,
 135         .probe = synth_probe,
 136         .release = dtlk_release,
 137         .synth_immediate = synth_immediate,
 138         .catch_up = do_catch_up,
 139         .flush = synth_flush,
 140         .is_alive = spk_synth_is_alive_nop,
 141         .synth_adjust = NULL,
 142         .read_buff_add = NULL,
 143         .get_index = spk_serial_in_nowait,
 144         .indexing = {
 145                 .command = "\x01%di",
 146                 .lowindex = 1,
 147                 .highindex = 5,
 148                 .currindex = 1,
 149         },
 150         .attributes = {
 151                 .attrs = synth_attrs,
 152                 .name = "dtlk",
 153         },
 154 };
 155
 156 static inline bool synth_readable(void)
 157 {
 158         synth_status = inb_p(speakup_info.port_tts + UART_RX);
 159         return (synth_status & TTS_READABLE) != 0;
 160 }
 161
 162 static inline bool synth_writable(void)
 163 {
 164         synth_status = inb_p(speakup_info.port_tts + UART_RX);
 165         return (synth_status & TTS_WRITABLE) != 0;
 166 }
 167
 168 static inline bool synth_full(void)
 169 {
 170         synth_status = inb_p(speakup_info.port_tts + UART_RX);
 171         return (synth_status & TTS_ALMOST_FULL) != 0;
 172 }
 173
 174 static void spk_out(const char ch)
 175 {
 176         int timeout = SPK_XMITR_TIMEOUT;
 177
 178         while (!synth_writable()) {
 179                 if (!--timeout)
 180                         break;
 181                 udelay(1);
 182         }
 183         outb_p(ch, speakup_info.port_tts);
 184         timeout = SPK_XMITR_TIMEOUT;
 185         while (synth_writable()) {
 186                 if (!--timeout)
 187                         break;
 188                 udelay(1);
 189         }
 190 }
 191
 192 static void do_catch_up(struct spk_synth *synth)
 193 {
 194         u_char ch;
 195         unsigned long flags;
 196         unsigned long jiff_max;
 197         struct var_t *jiffy_delta;
 198         struct var_t *delay_time;
 199         int jiffy_delta_val;
 200         int delay_time_val;
 201
 202         jiffy_delta = spk_get_var(JIFFY);
 203         delay_time = spk_get_var(DELAY);
 204         spin_lock_irqsave(&speakup_info.spinlock, flags);
 205         jiffy_delta_val = jiffy_delta->u.n.value;
 206         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 207         jiff_max = jiffies + jiffy_delta_val;
 208         while (!kthread_should_stop()) {
 209                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 210                 if (speakup_info.flushing) {
 211                         speakup_info.flushing = 0;
 212                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 213                         synth->flush(synth);
 214                         continue;
 215                 }
 216                 if (synth_buffer_empty()) {
 217                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 218                         break;
 219                 }
 220                 set_current_state(TASK_INTERRUPTIBLE);
 221                 delay_time_val = delay_time->u.n.value;
 222                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 223                 if (synth_full()) {
 224                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 225                         continue;
 226                 }
 227                 set_current_state(TASK_RUNNING);
 228                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 229                 ch = synth_buffer_getc();
 230                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 231                 if (ch == '\n')
 232                         ch = PROCSPEECH;
 233                 spk_out(ch);
 234                 if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
 235                         spk_out(PROCSPEECH);
 236                         spin_lock_irqsave(&speakup_info.spinlock, flags);
 237                         delay_time_val = delay_time->u.n.value;
 238                         jiffy_delta_val = jiffy_delta->u.n.value;
 239                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 240                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 241                         jiff_max = jiffies + jiffy_delta_val;
 242                 }
 243         }
 244         spk_out(PROCSPEECH);
 245 }
 246
 247 static const char *synth_immediate(struct spk_synth *synth, const char *buf)
 248 {
 249         u_char ch;
 250
 251         while ((ch = (u_char)*buf)) {
 252                 if (synth_full())
 253                         return buf;
 254                 if (ch == '\n')
 255                         ch = PROCSPEECH;
 256                 spk_out(ch);
 257                 buf++;
 258         }
 259         return NULL;
 260 }
 261
 262 static void synth_flush(struct spk_synth *synth)
 263 {
 264         outb_p(SYNTH_CLEAR, speakup_info.port_tts);
 265         while (synth_writable())
 266                 cpu_relax();
 267 }
 268
 269 static char synth_read_tts(void)
 270 {
 271         u_char ch;
 272
 273         while (!synth_readable())
 274                 cpu_relax();
 275         ch = synth_status & 0x7f;
 276         outb_p(ch, speakup_info.port_tts);
 277         while (synth_readable())
 278                 cpu_relax();
 279         return (char) ch;
 280 }
 281
 282 /* interrogate the DoubleTalk PC and return its settings */
 283 static struct synth_settings *synth_interrogate(struct spk_synth *synth)
 284 {
 285         u_char *t;
 286         static char buf[sizeof(struct synth_settings) + 1];
 287         int total, i;
 288         static struct synth_settings status;
 289
 290         synth_immediate(synth, "\x18\x01?");
 291         for (total = 0, i = 0; i < 50; i++) {
 292                 buf[total] = synth_read_tts();
 293                 if (total > 2 && buf[total] == 0x7f)
 294                         break;
 295                 if (total < sizeof(struct synth_settings))
 296                         total++;
 297         }
 298         t = buf;
 299         /* serial number is little endian */
 300         status.serial_number = t[0] + t[1]*256;
 301         t += 2;
 302         for (i = 0; *t != '\r'; t++) {
 303                 status.rom_version[i] = *t;
 304                 if (i < sizeof(status.rom_version)-1)
 305                         i++;
 306         }
 307         status.rom_version[i] = 0;
 308         t++;
 309         status.mode = *t++;
 310         status.punc_level = *t++;
 311         status.formant_freq = *t++;
 312         status.pitch = *t++;
 313         status.speed = *t++;
 314         status.volume = *t++;
 315         status.tone = *t++;
 316         status.expression = *t++;
 317         status.ext_dict_loaded = *t++;
 318         status.ext_dict_status = *t++;
 319         status.free_ram = *t++;
 320         status.articulation = *t++;
 321         status.reverb = *t++;
 322         status.eob = *t++;
 323         return &status;
 324 }
 325
 326 static int synth_probe(struct spk_synth *synth)
 327 {
 328         unsigned int port_val = 0;
 329         int i = 0;
 330         struct synth_settings *sp;
 331
 332         pr_info("Probing for DoubleTalk.\n");
 333         if (port_forced) {
 334                 speakup_info.port_tts = port_forced;
 335                 pr_info("probe forced to %x by kernel command line\n",
 336                                 speakup_info.port_tts);
 337                 if ((port_forced & 0xf) != 0xf)
 338                         pr_info("warning: port base should probably end with f\n");
 339                 if (synth_request_region(speakup_info.port_tts-1,
 340                                         SYNTH_IO_EXTENT)) {
 341                         pr_warn("sorry, port already reserved\n");
 342                         return -EBUSY;
 343                 }
 344                 port_val = inw(speakup_info.port_tts-1);
 345                 synth_lpc = speakup_info.port_tts-1;
 346         } else {
 347                 for (i = 0; synth_portlist[i]; i++) {
 348                         if (synth_request_region(synth_portlist[i],
 349                                                 SYNTH_IO_EXTENT))
 350                                 continue;
 351                         port_val = inw(synth_portlist[i]) & 0xfbff;
 352                         if (port_val == 0x107f) {
 353                                 synth_lpc = synth_portlist[i];
 354                                 speakup_info.port_tts = synth_lpc+1;
 355                                 break;
 356                         }
 357                         synth_release_region(synth_portlist[i],
 358                                         SYNTH_IO_EXTENT);
 359                 }
 360         }
 361         port_val &= 0xfbff;
 362         if (port_val != 0x107f) {
 363                 pr_info("DoubleTalk PC: not found\n");
 364                 if (synth_lpc)
 365                         synth_release_region(synth_lpc, SYNTH_IO_EXTENT);
 366                 return -ENODEV;
 367         }
 368         while (inw_p(synth_lpc) != 0x147f)
 369                 cpu_relax(); /* wait until it's ready */
 370         sp = synth_interrogate(synth);
 371         pr_info("%s: %03x-%03x, ROM ver %s, s/n %u, driver: %s\n",
 372                 synth->long_name, synth_lpc, synth_lpc+SYNTH_IO_EXTENT - 1,
 373                 sp->rom_version, sp->serial_number, synth->version);
 374         synth->alive = 1;
 375         return 0;
 376 }
 377
 378 static void dtlk_release(void)
 379 {
 380         if (speakup_info.port_tts)
 381                 synth_release_region(speakup_info.port_tts-1, SYNTH_IO_EXTENT);
 382         speakup_info.port_tts = 0;
 383 }
 384
 385 module_param_named(port, port_forced, int, S_IRUGO);
 386 module_param_named(start, synth_dtlk.startup, short, S_IRUGO);
 387
 388 MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
 389 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 390
 391 static int __init dtlk_init(void)
 392 {
 393         return synth_add(&synth_dtlk);
 394 }
 395
 396 static void __exit dtlk_exit(void)
 397 {
 398         synth_remove(&synth_dtlk);
 399 }
 400
 401 module_init(dtlk_init);
 402 module_exit(dtlk_exit);
 403 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 404 MODULE_AUTHOR("David Borowski");
 405 MODULE_DESCRIPTION("Speakup support for DoubleTalk PC synthesizers");
 406 MODULE_LICENSE("GPL");
 407 MODULE_VERSION(DRV_VERSION);
 408