drivers/staging/speakup/speakup_decpc.c

   1 /*
   2  * This is the DECtalk PC speakup driver
   3  *
   4  * Some constants from DEC's DOS driver:
   5  *      Copyright (c) by Digital Equipment Corp.
   6  *
   7  * 386BSD DECtalk PC driver:
   8  *      Copyright (c) 1996 Brian Buhrow <buhrow@lothlorien.nfbcal.org>
   9  *
  10  * Linux DECtalk PC driver:
  11  *      Copyright (c) 1997 Nicolas Pitre <nico@cam.org>
  12  *
  13  * speakup DECtalk PC Internal driver:
  14  *      Copyright (c) 2003 David Borowski <david575@golden.net>
  15  *
  16  * All rights reserved.
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  */
  28 #include <linux/jiffies.h>
  29 #include <linux/sched.h>
  30 #include <linux/timer.h>
  31 #include <linux/kthread.h>
  32
  33 #include "spk_priv.h"
  34 #include "speakup.h"
  35
  36 #define MODULE_init             0x0dec          /* module in boot code */
  37 #define MODULE_self_test        0x8800          /* module in self-test */
  38 #define MODULE_reset            0xffff          /* reinit the whole module */
  39
  40 #define MODE_mask               0xf000          /* mode bits in high nibble */
  41 #define MODE_null               0x0000
  42 #define MODE_test               0x2000          /* in testing mode */
  43 #define MODE_status             0x8000
  44 #define STAT_int                0x0001          /* running in interrupt mode */
  45 #define STAT_tr_char            0x0002  /* character data to transmit */
  46 #define STAT_rr_char            0x0004  /* ready to receive char data */
  47 #define STAT_cmd_ready          0x0008  /* ready to accept commands */
  48 #define STAT_dma_ready          0x0010  /* dma command ready */
  49 #define STAT_digitized          0x0020  /* spc in digitized mode */
  50 #define STAT_new_index          0x0040  /* new last index ready */
  51 #define STAT_new_status         0x0080  /* new status posted */
  52 #define STAT_dma_state          0x0100  /* dma state toggle */
  53 #define STAT_index_valid        0x0200  /* indexs are valid */
  54 #define STAT_flushing           0x0400  /* flush in progress */
  55 #define STAT_self_test          0x0800  /* module in self test */
  56 #define MODE_ready              0xc000  /* module ready for next phase */
  57 #define READY_boot              0x0000
  58 #define READY_kernel            0x0001
  59 #define MODE_error              0xf000
  60
  61 #define CMD_mask                0xf000  /* mask for command nibble */
  62 #define CMD_null                0x0000  /* post status */
  63 #define CMD_control             0x1000  /* hard control command */
  64 #define CTRL_mask               0x0F00  /*   mask off control nibble */
  65 #define CTRL_data               0x00FF  /*   mask to get data byte */
  66 #define CTRL_null               0x0000  /*   null control */
  67 #define CTRL_vol_up             0x0100  /*   increase volume */
  68 #define CTRL_vol_down           0x0200  /*   decrease volume */
  69 #define CTRL_vol_set            0x0300  /*   set volume */
  70 #define CTRL_pause              0x0400  /*   pause spc */
  71 #define CTRL_resume             0x0500  /*   resume spc clock */
  72 #define CTRL_resume_spc         0x0001  /*   resume spc soft pause */
  73 #define CTRL_flush              0x0600  /*   flush all buffers */
  74 #define CTRL_int_enable 0x0700  /*   enable status change ints */
  75 #define CTRL_buff_free          0x0800  /*   buffer remain count */
  76 #define CTRL_buff_used          0x0900  /*   buffer in use */
  77 #define CTRL_speech             0x0a00  /*   immediate speech change */
  78 #define    CTRL_SP_voice        0x0001  /*       voice change */
  79 #define    CTRL_SP_rate         0x0002  /*       rate change */
  80 #define    CTRL_SP_comma        0x0003  /*       comma pause change */
  81 #define    CTRL_SP_period       0x0004  /*       period pause change */
  82 #define    CTRL_SP_rate_delta   0x0005  /*       delta rate change */
  83 #define    CTRL_SP_get_param    0x0006  /*       return the desired parameter */
  84 #define CTRL_last_index         0x0b00  /*   get last index spoken */
  85 #define CTRL_io_priority        0x0c00  /*   change i/o priority */
  86 #define CTRL_free_mem           0x0d00  /*   get free paragraphs on module */
  87 #define CTRL_get_lang           0x0e00  /* return bit mask of loaded
  88                                                  * languages
  89                                                  */
  90 #define CMD_test                        0x2000          /* self-test request */
  91 #define TEST_mask               0x0F00  /* isolate test field */
  92 #define TEST_null               0x0000  /* no test requested */
  93 #define TEST_isa_int            0x0100  /* assert isa irq */
  94 #define TEST_echo               0x0200  /* make data in == data out */
  95 #define TEST_seg                0x0300  /* set peek/poke segment */
  96 #define TEST_off                0x0400  /* set peek/poke offset */
  97 #define TEST_peek               0x0500  /* data out == *peek */
  98 #define TEST_poke               0x0600  /* *peek == data in */
  99 #define TEST_sub_code           0x00FF  /* user defined test sub codes */
 100 #define CMD_id                  0x3000  /* return software id */
 101 #define ID_null                 0x0000  /* null id */
 102 #define ID_kernel               0x0100  /* kernel code executing */
 103 #define ID_boot                 0x0200  /* boot code executing */
 104 #define CMD_dma                 0x4000          /* force a dma start */
 105 #define CMD_reset               0x5000          /* reset module status */
 106 #define CMD_sync                0x6000          /* kernel sync command */
 107 #define CMD_char_in             0x7000          /* single character send */
 108 #define CMD_char_out            0x8000          /* single character get */
 109 #define CHAR_count_1            0x0100  /*    one char in cmd_low */
 110 #define CHAR_count_2            0x0200  /*      the second in data_low */
 111 #define CHAR_count_3            0x0300  /*      the third in data_high */
 112 #define CMD_spc_mode            0x9000          /* change spc mode */
 113 #define CMD_spc_to_text         0x0100  /*   set to text mode */
 114 #define CMD_spc_to_digit        0x0200  /*   set to digital mode */
 115 #define CMD_spc_rate            0x0400  /*   change spc data rate */
 116 #define CMD_error               0xf000          /* severe error */
 117
 118 enum {  PRIMARY_DIC     = 0, USER_DIC, COMMAND_DIC, ABBREV_DIC };
 119
 120 #define DMA_single_in           0x01
 121 #define DMA_single_out          0x02
 122 #define DMA_buff_in             0x03
 123 #define DMA_buff_out            0x04
 124 #define DMA_control             0x05
 125 #define DT_MEM_ALLOC            0x03
 126 #define DT_SET_DIC              0x04
 127 #define DT_START_TASK           0x05
 128 #define DT_LOAD_MEM             0x06
 129 #define DT_READ_MEM             0x07
 130 #define DT_DIGITAL_IN           0x08
 131 #define DMA_sync                0x06
 132 #define DMA_sync_char           0x07
 133
 134 #define DRV_VERSION "2.12"
 135 #define PROCSPEECH 0x0b
 136 #define SYNTH_IO_EXTENT 8
 137
 138 static int synth_probe(struct spk_synth *synth);
 139 static void dtpc_release(void);
 140 static const char *synth_immediate(struct spk_synth *synth, const char *buf);
 141 static void do_catch_up(struct spk_synth *synth);
 142 static void synth_flush(struct spk_synth *synth);
 143
 144 static int synth_portlist[] = { 0x340, 0x350, 0x240, 0x250, 0 };
 145 static int in_escape, is_flushing;
 146 static int dt_stat, dma_state;
 147
 148 static struct var_t vars[] = {
 149         { CAPS_START, .u.s = {"[:dv ap 200]" } },
 150         { CAPS_STOP, .u.s = {"[:dv ap 100]" } },
 151         { RATE, .u.n = {"[:ra %d]", 9, 0, 18, 150, 25, NULL } },
 152         { PITCH, .u.n = {"[:dv ap %d]", 80, 0, 100, 20, 0, NULL } },
 153         { VOL, .u.n = {"[:vo se %d]", 5, 0, 9, 5, 10, NULL } },
 154         { PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" } },
 155         { VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" } },
 156         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
 157         V_LAST_VAR
 158 };
 159
 160 /*
 161  * These attributes will appear in /sys/accessibility/speakup/decpc.
 162  */
 163 static struct kobj_attribute caps_start_attribute =
 164         __ATTR(caps_start, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 165 static struct kobj_attribute caps_stop_attribute =
 166         __ATTR(caps_stop, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 167 static struct kobj_attribute pitch_attribute =
 168         __ATTR(pitch, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 169 static struct kobj_attribute punct_attribute =
 170         __ATTR(punct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 171 static struct kobj_attribute rate_attribute =
 172         __ATTR(rate, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 173 static struct kobj_attribute voice_attribute =
 174         __ATTR(voice, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 175 static struct kobj_attribute vol_attribute =
 176         __ATTR(vol, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 177
 178 static struct kobj_attribute delay_time_attribute =
 179         __ATTR(delay_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 180 static struct kobj_attribute direct_attribute =
 181         __ATTR(direct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 182 static struct kobj_attribute full_time_attribute =
 183         __ATTR(full_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 184 static struct kobj_attribute jiffy_delta_attribute =
 185         __ATTR(jiffy_delta, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 186 static struct kobj_attribute trigger_time_attribute =
 187         __ATTR(trigger_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
 188
 189 /*
 190  * Create a group of attributes so that we can create and destroy them all
 191  * at once.
 192  */
 193 static struct attribute *synth_attrs[] = {
 194         &caps_start_attribute.attr,
 195         &caps_stop_attribute.attr,
 196         &pitch_attribute.attr,
 197         &punct_attribute.attr,
 198         &rate_attribute.attr,
 199         &voice_attribute.attr,
 200         &vol_attribute.attr,
 201         &delay_time_attribute.attr,
 202         &direct_attribute.attr,
 203         &full_time_attribute.attr,
 204         &jiffy_delta_attribute.attr,
 205         &trigger_time_attribute.attr,
 206         NULL,   /* need to NULL terminate the list of attributes */
 207 };
 208
 209 static struct spk_synth synth_dec_pc = {
 210         .name = "decpc",
 211         .version = DRV_VERSION,
 212         .long_name = "Dectalk PC",
 213         .init = "[:pe -380]",
 214         .procspeech = PROCSPEECH,
 215         .delay = 500,
 216         .trigger = 50,
 217         .jiffies = 50,
 218         .full = 1000,
 219         .flags = SF_DEC,
 220         .startup = SYNTH_START,
 221         .checkval = SYNTH_CHECK,
 222         .vars = vars,
 223         .probe = synth_probe,
 224         .release = dtpc_release,
 225         .synth_immediate = synth_immediate,
 226         .catch_up = do_catch_up,
 227         .flush = synth_flush,
 228         .is_alive = spk_synth_is_alive_nop,
 229         .synth_adjust = NULL,
 230         .read_buff_add = NULL,
 231         .get_index = NULL,
 232         .indexing = {
 233                 .command = NULL,
 234                 .lowindex = 0,
 235                 .highindex = 0,
 236                 .currindex = 0,
 237         },
 238         .attributes = {
 239                 .attrs = synth_attrs,
 240                 .name = "decpc",
 241         },
 242 };
 243
 244 static int dt_getstatus(void)
 245 {
 246         dt_stat = inb_p(speakup_info.port_tts) |
 247                  (inb_p(speakup_info.port_tts + 1) << 8);
 248         return dt_stat;
 249 }
 250
 251 static void dt_sendcmd(u_int cmd)
 252 {
 253         outb_p(cmd & 0xFF, speakup_info.port_tts);
 254         outb_p((cmd >> 8) & 0xFF, speakup_info.port_tts+1);
 255 }
 256
 257 static int dt_waitbit(int bit)
 258 {
 259         int timeout = 100;
 260
 261         while (--timeout > 0) {
 262                 if ((dt_getstatus() & bit) == bit)
 263                         return 1;
 264                 udelay(50);
 265         }
 266         return 0;
 267 }
 268
 269 static int dt_wait_dma(void)
 270 {
 271         int timeout = 100, state = dma_state;
 272
 273         if (!dt_waitbit(STAT_dma_ready))
 274                 return 0;
 275         while (--timeout > 0) {
 276                 if ((dt_getstatus()&STAT_dma_state) == state)
 277                         return 1;
 278                 udelay(50);
 279         }
 280         dma_state = dt_getstatus() & STAT_dma_state;
 281         return 1;
 282 }
 283
 284 static int dt_ctrl(u_int cmd)
 285 {
 286         int timeout = 10;
 287
 288         if (!dt_waitbit(STAT_cmd_ready))
 289                 return -1;
 290         outb_p(0, speakup_info.port_tts+2);
 291         outb_p(0, speakup_info.port_tts+3);
 292         dt_getstatus();
 293         dt_sendcmd(CMD_control|cmd);
 294         outb_p(0, speakup_info.port_tts+6);
 295         while (dt_getstatus() & STAT_cmd_ready) {
 296                 udelay(20);
 297                 if (--timeout == 0)
 298                         break;
 299         }
 300         dt_sendcmd(CMD_null);
 301         return 0;
 302 }
 303
 304 static void synth_flush(struct spk_synth *synth)
 305 {
 306         int timeout = 10;
 307
 308         if (is_flushing)
 309                 return;
 310         is_flushing = 4;
 311         in_escape = 0;
 312         while (dt_ctrl(CTRL_flush)) {
 313                 if (--timeout == 0)
 314                         break;
 315 udelay(50);
 316         }
 317         for (timeout = 0; timeout < 10; timeout++) {
 318                 if (dt_waitbit(STAT_dma_ready))
 319                         break;
 320 udelay(50);
 321         }
 322         outb_p(DMA_sync, speakup_info.port_tts+4);
 323         outb_p(0, speakup_info.port_tts+4);
 324         udelay(100);
 325         for (timeout = 0; timeout < 10; timeout++) {
 326                 if (!(dt_getstatus() & STAT_flushing))
 327                         break;
 328 udelay(50);
 329         }
 330         dma_state = dt_getstatus() & STAT_dma_state;
 331         dma_state ^= STAT_dma_state;
 332         is_flushing = 0;
 333 }
 334
 335 static int dt_sendchar(char ch)
 336 {
 337         if (!dt_wait_dma())
 338                 return -1;
 339         if (!(dt_stat & STAT_rr_char))
 340                 return -2;
 341         outb_p(DMA_single_in, speakup_info.port_tts+4);
 342         outb_p(ch, speakup_info.port_tts+4);
 343         dma_state ^= STAT_dma_state;
 344         return 0;
 345 }
 346
 347 static int testkernel(void)
 348 {
 349         int status = 0;
 350
 351         if (dt_getstatus() == 0xffff) {
 352                 status = -1;
 353                 goto oops;
 354         }
 355         dt_sendcmd(CMD_sync);
 356         if (!dt_waitbit(STAT_cmd_ready))
 357                 status = -2;
 358         else if (dt_stat&0x8000)
 359                 return 0;
 360         else if (dt_stat == 0x0dec)
 361                 pr_warn("dec_pc at 0x%x, software not loaded\n",
 362                                 speakup_info.port_tts);
 363         status = -3;
 364 oops:   synth_release_region(speakup_info.port_tts, SYNTH_IO_EXTENT);
 365         speakup_info.port_tts = 0;
 366         return status;
 367 }
 368
 369 static void do_catch_up(struct spk_synth *synth)
 370 {
 371         u_char ch;
 372         static u_char last;
 373         unsigned long flags;
 374         unsigned long jiff_max;
 375         struct var_t *jiffy_delta;
 376         struct var_t *delay_time;
 377         int jiffy_delta_val;
 378         int delay_time_val;
 379
 380         jiffy_delta = spk_get_var(JIFFY);
 381         delay_time = spk_get_var(DELAY);
 382         spin_lock_irqsave(&speakup_info.spinlock, flags);
 383         jiffy_delta_val = jiffy_delta->u.n.value;
 384         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 385         jiff_max = jiffies + jiffy_delta_val;
 386
 387         while (!kthread_should_stop()) {
 388                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 389                 if (speakup_info.flushing) {
 390                         speakup_info.flushing = 0;
 391                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 392                         synth->flush(synth);
 393                         continue;
 394                 }
 395                 if (synth_buffer_empty()) {
 396                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 397                         break;
 398                 }
 399                 ch = synth_buffer_peek();
 400                 set_current_state(TASK_INTERRUPTIBLE);
 401                 delay_time_val = delay_time->u.n.value;
 402                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 403                 if (ch == '\n')
 404                         ch = 0x0D;
 405                 if (dt_sendchar(ch)) {
 406                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 407                         continue;
 408                 }
 409                 set_current_state(TASK_RUNNING);
 410                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 411                 synth_buffer_getc();
 412                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 413                 if (ch == '[')
 414                         in_escape = 1;
 415                 else if (ch == ']')
 416                         in_escape = 0;
 417                 else if (ch <= SPACE) {
 418                         if (!in_escape && strchr(",.!?;:", last))
 419                                 dt_sendchar(PROCSPEECH);
 420                         if (time_after_eq(jiffies, jiff_max)) {
 421                                 if (!in_escape)
 422                                         dt_sendchar(PROCSPEECH);
 423                                 spin_lock_irqsave(&speakup_info.spinlock,
 424                                                         flags);
 425                                 jiffy_delta_val = jiffy_delta->u.n.value;
 426                                 delay_time_val = delay_time->u.n.value;
 427                                 spin_unlock_irqrestore(&speakup_info.spinlock,
 428                                                         flags);
 429                                 schedule_timeout(msecs_to_jiffies
 430                                                  (delay_time_val));
 431                                 jiff_max = jiffies + jiffy_delta_val;
 432                         }
 433                 }
 434                 last = ch;
 435                 ch = 0;
 436         }
 437         if (!in_escape)
 438                 dt_sendchar(PROCSPEECH);
 439 }
 440
 441 static const char *synth_immediate(struct spk_synth *synth, const char *buf)
 442 {
 443         u_char ch;
 444
 445         while ((ch = *buf)) {
 446                 if (ch == '\n')
 447                         ch = PROCSPEECH;
 448                 if (dt_sendchar(ch))
 449                         return buf;
 450                 buf++;
 451         }
 452         return NULL;
 453 }
 454
 455 static int synth_probe(struct spk_synth *synth)
 456 {
 457         int i = 0, failed = 0;
 458
 459         pr_info("Probing for %s.\n", synth->long_name);
 460         for (i = 0; synth_portlist[i]; i++) {
 461                 if (synth_request_region(synth_portlist[i], SYNTH_IO_EXTENT)) {
 462                         pr_warn("request_region: failed with 0x%x, %d\n",
 463                                 synth_portlist[i], SYNTH_IO_EXTENT);
 464                         continue;
 465                 }
 466                 speakup_info.port_tts = synth_portlist[i];
 467                 failed = testkernel();
 468                 if (failed == 0)
 469                         break;
 470         }
 471         if (failed) {
 472                 pr_info("%s: not found\n", synth->long_name);
 473                 return -ENODEV;
 474         }
 475         pr_info("%s: %03x-%03x, Driver Version %s,\n", synth->long_name,
 476                 speakup_info.port_tts, speakup_info.port_tts + 7,
 477                 synth->version);
 478         synth->alive = 1;
 479         return 0;
 480 }
 481
 482 static void dtpc_release(void)
 483 {
 484         if (speakup_info.port_tts)
 485                 synth_release_region(speakup_info.port_tts, SYNTH_IO_EXTENT);
 486         speakup_info.port_tts = 0;
 487 }
 488
 489 module_param_named(start, synth_dec_pc.startup, short, S_IRUGO);
 490
 491 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 492
 493 module_spk_synth(synth_dec_pc);
 494
 495 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 496 MODULE_AUTHOR("David Borowski");
 497 MODULE_DESCRIPTION("Speakup support for DECtalk PC synthesizers");
 498 MODULE_LICENSE("GPL");
 499 MODULE_VERSION(DRV_VERSION);