drivers/staging/speakup/speakup_dectlk.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  * specificly written as a driver for the speakup screenreview
  19  * s not a general device driver.
  20  */
  21 #include <linux/unistd.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/jiffies.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/sched.h>
  26 #include <linux/timer.h>
  27 #include <linux/kthread.h>
  28 #include "speakup.h"
  29 #include "spk_priv.h"
  30 #include "serialio.h"
  31
  32 #define DRV_VERSION "2.20"
  33 #define SYNTH_CLEAR 0x03
  34 #define PROCSPEECH 0x0b
  35 static int xoff;
  36
  37 static inline int synth_full(void)
  38 {
  39         return xoff;
  40 }
  41
  42 static void do_catch_up(struct spk_synth *synth);
  43 static void synth_flush(struct spk_synth *synth);
  44 static void read_buff_add(u_char c);
  45 static unsigned char get_index(void);
  46
  47 static int in_escape;
  48 static int is_flushing;
  49
  50 static spinlock_t flush_lock;
  51 static DECLARE_WAIT_QUEUE_HEAD(flush);
  52
  53 static struct var_t vars[] = {
  54         { CAPS_START, .u.s = {"[:dv ap 160] " } },
  55         { CAPS_STOP, .u.s = {"[:dv ap 100 ] " } },
  56         { RATE, .u.n = {"[:ra %d] ", 180, 75, 650, 0, 0, NULL } },
  57         { PITCH, .u.n = {"[:dv ap %d] ", 122, 50, 350, 0, 0, NULL } },
  58         { VOL, .u.n = {"[:dv g5 %d] ", 86, 60, 86, 0, 0, NULL } },
  59         { PUNCT, .u.n = {"[:pu %c] ", 0, 0, 2, 0, 0, "nsa" } },
  60         { VOICE, .u.n = {"[:n%c] ", 0, 0, 9, 0, 0, "phfdburwkv" } },
  61         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  62         V_LAST_VAR
  63 };
  64
  65 /*
  66  * These attributes will appear in /sys/accessibility/speakup/dectlk.
  67  */
  68 static struct kobj_attribute caps_start_attribute =
  69         __ATTR(caps_start, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  70 static struct kobj_attribute caps_stop_attribute =
  71         __ATTR(caps_stop, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  72 static struct kobj_attribute pitch_attribute =
  73         __ATTR(pitch, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  74 static struct kobj_attribute punct_attribute =
  75         __ATTR(punct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  76 static struct kobj_attribute rate_attribute =
  77         __ATTR(rate, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  78 static struct kobj_attribute voice_attribute =
  79         __ATTR(voice, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  80 static struct kobj_attribute vol_attribute =
  81         __ATTR(vol, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  82
  83 static struct kobj_attribute delay_time_attribute =
  84         __ATTR(delay_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  85 static struct kobj_attribute direct_attribute =
  86         __ATTR(direct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  87 static struct kobj_attribute full_time_attribute =
  88         __ATTR(full_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  89 static struct kobj_attribute jiffy_delta_attribute =
  90         __ATTR(jiffy_delta, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  91 static struct kobj_attribute trigger_time_attribute =
  92         __ATTR(trigger_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  93
  94 /*
  95  * Create a group of attributes so that we can create and destroy them all
  96  * at once.
  97  */
  98 static struct attribute *synth_attrs[] = {
  99         &caps_start_attribute.attr,
 100         &caps_stop_attribute.attr,
 101         &pitch_attribute.attr,
 102         &punct_attribute.attr,
 103         &rate_attribute.attr,
 104         &voice_attribute.attr,
 105         &vol_attribute.attr,
 106         &delay_time_attribute.attr,
 107         &direct_attribute.attr,
 108         &full_time_attribute.attr,
 109         &jiffy_delta_attribute.attr,
 110         &trigger_time_attribute.attr,
 111         NULL,   /* need to NULL terminate the list of attributes */
 112 };
 113
 114 static int ap_defaults[] = {122, 89, 155, 110, 208, 240, 200, 106, 306};
 115 static int g5_defaults[] = {86, 81, 86, 84, 81, 80, 83, 83, 73};
 116
 117 static struct spk_synth synth_dectlk = {
 118         .name = "dectlk",
 119         .version = DRV_VERSION,
 120         .long_name = "Dectalk Express",
 121         .init = "[:error sp :name paul :rate 180 :tsr off] ",
 122         .procspeech = PROCSPEECH,
 123         .clear = SYNTH_CLEAR,
 124         .delay = 500,
 125         .trigger = 50,
 126         .jiffies = 50,
 127         .full = 40000,
 128         .startup = SYNTH_START,
 129         .checkval = SYNTH_CHECK,
 130         .vars = vars,
 131         .default_pitch = ap_defaults,
 132         .default_vol = g5_defaults,
 133         .probe = spk_serial_synth_probe,
 134         .release = spk_serial_release,
 135         .synth_immediate = spk_synth_immediate,
 136         .catch_up = do_catch_up,
 137         .flush = synth_flush,
 138         .is_alive = spk_synth_is_alive_restart,
 139         .synth_adjust = NULL,
 140         .read_buff_add = read_buff_add,
 141         .get_index = get_index,
 142         .indexing = {
 143                 .command = "[:in re %d ] ",
 144                 .lowindex = 1,
 145                 .highindex = 8,
 146                 .currindex = 1,
 147         },
 148         .attributes = {
 149                 .attrs = synth_attrs,
 150                 .name = "dectlk",
 151         },
 152 };
 153
 154 static int is_indnum(u_char *ch)
 155 {
 156         if ((*ch >= '0') && (*ch <= '9')) {
 157                 *ch = *ch - '0';
 158                 return 1;
 159         }
 160         return 0;
 161 }
 162
 163 static u_char lastind;
 164
 165 static unsigned char get_index(void)
 166 {
 167         u_char rv;
 168
 169         rv = lastind;
 170         lastind = 0;
 171         return rv;
 172 }
 173
 174 static void read_buff_add(u_char c)
 175 {
 176         static int ind = -1;
 177
 178         if (c == 0x01) {
 179                 unsigned long flags;
 180
 181                 spin_lock_irqsave(&flush_lock, flags);
 182                 is_flushing = 0;
 183                 wake_up_interruptible(&flush);
 184                 spin_unlock_irqrestore(&flush_lock, flags);
 185         } else if (c == 0x13) {
 186                 xoff = 1;
 187         } else if (c == 0x11) {
 188                 xoff = 0;
 189         } else if (is_indnum(&c)) {
 190                 if (ind == -1)
 191                         ind = c;
 192                 else
 193                         ind = ind * 10 + c;
 194         } else if ((c > 31) && (c < 127)) {
 195                 if (ind != -1)
 196                         lastind = (u_char)ind;
 197                 ind = -1;
 198         }
 199 }
 200
 201 static void do_catch_up(struct spk_synth *synth)
 202 {
 203         int synth_full_val = 0;
 204         static u_char ch;
 205         static u_char last = '\0';
 206         unsigned long flags;
 207         unsigned long jiff_max;
 208         unsigned long timeout = msecs_to_jiffies(4000);
 209         DEFINE_WAIT(wait);
 210         struct var_t *jiffy_delta;
 211         struct var_t *delay_time;
 212         int jiffy_delta_val;
 213         int delay_time_val;
 214
 215         jiffy_delta = spk_get_var(JIFFY);
 216         delay_time = spk_get_var(DELAY);
 217         spin_lock_irqsave(&speakup_info.spinlock, flags);
 218         jiffy_delta_val = jiffy_delta->u.n.value;
 219         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 220         jiff_max = jiffies + jiffy_delta_val;
 221
 222         while (!kthread_should_stop()) {
 223                 /* if no ctl-a in 4, send data anyway */
 224                 spin_lock_irqsave(&flush_lock, flags);
 225                 while (is_flushing && timeout) {
 226                         prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);
 227                         spin_unlock_irqrestore(&flush_lock, flags);
 228                         timeout = schedule_timeout(timeout);
 229                         spin_lock_irqsave(&flush_lock, flags);
 230                 }
 231                 finish_wait(&flush, &wait);
 232                 is_flushing = 0;
 233                 spin_unlock_irqrestore(&flush_lock, flags);
 234
 235                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 236                 if (speakup_info.flushing) {
 237                         speakup_info.flushing = 0;
 238                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 239                         synth->flush(synth);
 240                         continue;
 241                 }
 242                 if (synth_buffer_empty()) {
 243                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 244                         break;
 245                 }
 246                 ch = synth_buffer_peek();
 247                 set_current_state(TASK_INTERRUPTIBLE);
 248                 delay_time_val = delay_time->u.n.value;
 249                 synth_full_val = synth_full();
 250                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 251                 if (ch == '\n')
 252                         ch = 0x0D;
 253                 if (synth_full_val || !spk_serial_out(ch)) {
 254                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 255                         continue;
 256                 }
 257                 set_current_state(TASK_RUNNING);
 258                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 259                 synth_buffer_getc();
 260                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 261                 if (ch == '[')
 262                         in_escape = 1;
 263                 else if (ch == ']')
 264                         in_escape = 0;
 265                 else if (ch <= SPACE) {
 266                         if (!in_escape && strchr(",.!?;:", last))
 267                                 spk_serial_out(PROCSPEECH);
 268                         if (time_after_eq(jiffies, jiff_max)) {
 269                                 if (!in_escape)
 270                                         spk_serial_out(PROCSPEECH);
 271                                 spin_lock_irqsave(&speakup_info.spinlock,
 272                                                 flags);
 273                                 jiffy_delta_val = jiffy_delta->u.n.value;
 274                                 delay_time_val = delay_time->u.n.value;
 275                                 spin_unlock_irqrestore(&speakup_info.spinlock,
 276                                                 flags);
 277                                 schedule_timeout(msecs_to_jiffies
 278                                                  (delay_time_val));
 279                                 jiff_max = jiffies + jiffy_delta_val;
 280                         }
 281                 }
 282                 last = ch;
 283         }
 284         if (!in_escape)
 285                 spk_serial_out(PROCSPEECH);
 286 }
 287
 288 static void synth_flush(struct spk_synth *synth)
 289 {
 290         if (in_escape)
 291                 /* if in command output ']' so we don't get an error */
 292                 spk_serial_out(']');
 293         in_escape = 0;
 294         is_flushing = 1;
 295         spk_serial_out(SYNTH_CLEAR);
 296 }
 297
 298 module_param_named(ser, synth_dectlk.ser, int, S_IRUGO);
 299 module_param_named(start, synth_dectlk.startup, short, S_IRUGO);
 300
 301 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
 302 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 303
 304 module_spk_synth(synth_dectlk);
 305
 306 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 307 MODULE_AUTHOR("David Borowski");
 308 MODULE_DESCRIPTION("Speakup support for DECtalk Express synthesizers");
 309 MODULE_LICENSE("GPL");
 310 MODULE_VERSION(DRV_VERSION);
 311