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  * 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  * s not a general device driver.
  24  */
  25 #include <linux/unistd.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/sched.h>
  30 #include <linux/timer.h>
  31 #include <linux/kthread.h>
  32 #include "speakup.h"
  33 #include "spk_priv.h"
  34 #include "serialio.h"
  35
  36 #define DRV_VERSION "2.20"
  37 #define SYNTH_CLEAR 0x03
  38 #define PROCSPEECH 0x0b
  39 static int xoff;
  40
  41 static inline int synth_full(void)
  42 {
  43         return xoff;
  44 }
  45
  46 static void do_catch_up(struct spk_synth *synth);
  47 static void synth_flush(struct spk_synth *synth);
  48 static void read_buff_add(u_char c);
  49 static unsigned char get_index(void);
  50
  51 static int in_escape;
  52 static int is_flushing;
  53
  54 static spinlock_t flush_lock;
  55 static DECLARE_WAIT_QUEUE_HEAD(flush);
  56
  57 static struct var_t vars[] = {
  58         { CAPS_START, .u.s = {"[:dv ap 160] " } },
  59         { CAPS_STOP, .u.s = {"[:dv ap 100 ] " } },
  60         { RATE, .u.n = {"[:ra %d] ", 180, 75, 650, 0, 0, NULL } },
  61         { PITCH, .u.n = {"[:dv ap %d] ", 122, 50, 350, 0, 0, NULL } },
  62         { VOL, .u.n = {"[:dv g5 %d] ", 86, 60, 86, 0, 0, NULL } },
  63         { PUNCT, .u.n = {"[:pu %c] ", 0, 0, 2, 0, 0, "nsa" } },
  64         { VOICE, .u.n = {"[:n%c] ", 0, 0, 9, 0, 0, "phfdburwkv" } },
  65         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  66         V_LAST_VAR
  67 };
  68
  69 /*
  70  * These attributes will appear in /sys/accessibility/speakup/dectlk.
  71  */
  72 static struct kobj_attribute caps_start_attribute =
  73         __ATTR(caps_start, USER_RW, spk_var_show, spk_var_store);
  74 static struct kobj_attribute caps_stop_attribute =
  75         __ATTR(caps_stop, USER_RW, spk_var_show, spk_var_store);
  76 static struct kobj_attribute pitch_attribute =
  77         __ATTR(pitch, USER_RW, spk_var_show, spk_var_store);
  78 static struct kobj_attribute punct_attribute =
  79         __ATTR(punct, USER_RW, spk_var_show, spk_var_store);
  80 static struct kobj_attribute rate_attribute =
  81         __ATTR(rate, USER_RW, spk_var_show, spk_var_store);
  82 static struct kobj_attribute voice_attribute =
  83         __ATTR(voice, USER_RW, spk_var_show, spk_var_store);
  84 static struct kobj_attribute vol_attribute =
  85         __ATTR(vol, USER_RW, spk_var_show, spk_var_store);
  86
  87 static struct kobj_attribute delay_time_attribute =
  88         __ATTR(delay_time, ROOT_W, spk_var_show, spk_var_store);
  89 static struct kobj_attribute direct_attribute =
  90         __ATTR(direct, USER_RW, spk_var_show, spk_var_store);
  91 static struct kobj_attribute full_time_attribute =
  92         __ATTR(full_time, ROOT_W, spk_var_show, spk_var_store);
  93 static struct kobj_attribute jiffy_delta_attribute =
  94         __ATTR(jiffy_delta, ROOT_W, spk_var_show, spk_var_store);
  95 static struct kobj_attribute trigger_time_attribute =
  96         __ATTR(trigger_time, ROOT_W, spk_var_show, spk_var_store);
  97
  98 /*
  99  * Create a group of attributes so that we can create and destroy them all
 100  * at once.
 101  */
 102 static struct attribute *synth_attrs[] = {
 103         &caps_start_attribute.attr,
 104         &caps_stop_attribute.attr,
 105         &pitch_attribute.attr,
 106         &punct_attribute.attr,
 107         &rate_attribute.attr,
 108         &voice_attribute.attr,
 109         &vol_attribute.attr,
 110         &delay_time_attribute.attr,
 111         &direct_attribute.attr,
 112         &full_time_attribute.attr,
 113         &jiffy_delta_attribute.attr,
 114         &trigger_time_attribute.attr,
 115         NULL,   /* need to NULL terminate the list of attributes */
 116 };
 117
 118 static int ap_defaults[] = {122, 89, 155, 110, 208, 240, 200, 106, 306};
 119 static int g5_defaults[] = {86, 81, 86, 84, 81, 80, 83, 83, 73};
 120
 121 static struct spk_synth synth_dectlk = {
 122         .name = "dectlk",
 123         .version = DRV_VERSION,
 124         .long_name = "Dectalk Express",
 125         .init = "[:error sp :name paul :rate 180 :tsr off] ",
 126         .procspeech = PROCSPEECH,
 127         .clear = SYNTH_CLEAR,
 128         .delay = 500,
 129         .trigger = 50,
 130         .jiffies = 50,
 131         .full = 40000,
 132         .startup = SYNTH_START,
 133         .checkval = SYNTH_CHECK,
 134         .vars = vars,
 135         .default_pitch = ap_defaults,
 136         .default_vol = g5_defaults,
 137         .probe = serial_synth_probe,
 138         .release = spk_serial_release,
 139         .synth_immediate = spk_synth_immediate,
 140         .catch_up = do_catch_up,
 141         .flush = synth_flush,
 142         .is_alive = spk_synth_is_alive_restart,
 143         .synth_adjust = NULL,
 144         .read_buff_add = read_buff_add,
 145         .get_index = get_index,
 146         .indexing = {
 147                 .command = "[:in re %d ] ",
 148                 .lowindex = 1,
 149                 .highindex = 8,
 150                 .currindex = 1,
 151         },
 152         .attributes = {
 153                 .attrs = synth_attrs,
 154                 .name = "dectlk",
 155         },
 156 };
 157
 158 static int is_indnum(u_char *ch)
 159 {
 160         if ((*ch >= '0') && (*ch <= '9')) {
 161                 *ch = *ch - '0';
 162                 return 1;
 163         }
 164         return 0;
 165 }
 166
 167 static u_char lastind;
 168
 169 static unsigned char get_index(void)
 170 {
 171         u_char rv;
 172         rv = lastind;
 173         lastind = 0;
 174         return rv;
 175 }
 176
 177 static void read_buff_add(u_char c)
 178 {
 179         static int ind = -1;
 180
 181         if (c == 0x01) {
 182                 unsigned long flags;
 183                 spin_lock_irqsave(&flush_lock, flags);
 184                 is_flushing = 0;
 185                 wake_up_interruptible(&flush);
 186                 spin_unlock_irqrestore(&flush_lock, flags);
 187         } else if (c == 0x13) {
 188                 xoff = 1;
 189         } else if (c == 0x11) {
 190                 xoff = 0;
 191         } else if (is_indnum(&c)) {
 192                 if (ind == -1)
 193                         ind = c;
 194                 else
 195                         ind = ind * 10 + c;
 196         } else if ((c > 31) && (c < 127)) {
 197                 if (ind != -1)
 198                         lastind = (u_char)ind;
 199                 ind = -1;
 200         }
 201 }
 202
 203 static void do_catch_up(struct spk_synth *synth)
 204 {
 205         int synth_full_val = 0;
 206         static u_char ch;
 207         static u_char last = '\0';
 208         unsigned long flags;
 209         unsigned long jiff_max;
 210         unsigned long timeout = msecs_to_jiffies(4000);
 211         DEFINE_WAIT(wait);
 212         struct var_t *jiffy_delta;
 213         struct var_t *delay_time;
 214         int jiffy_delta_val;
 215         int delay_time_val;
 216
 217         jiffy_delta = get_var(JIFFY);
 218         delay_time = get_var(DELAY);
 219         spk_lock(flags);
 220         jiffy_delta_val = jiffy_delta->u.n.value;
 221         spk_unlock(flags);
 222         jiff_max = jiffies + jiffy_delta_val;
 223
 224         while (!kthread_should_stop()) {
 225                 /* if no ctl-a in 4, send data anyway */
 226                 spin_lock_irqsave(&flush_lock, flags);
 227                 while (is_flushing && timeout) {
 228                         prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);
 229                         spin_unlock_irqrestore(&flush_lock, flags);
 230                         timeout = schedule_timeout(timeout);
 231                         spin_lock_irqsave(&flush_lock, flags);
 232                 }
 233                 finish_wait(&flush, &wait);
 234                 is_flushing = 0;
 235                 spin_unlock_irqrestore(&flush_lock, flags);
 236
 237                 spk_lock(flags);
 238                 if (speakup_info.flushing) {
 239                         speakup_info.flushing = 0;
 240                         spk_unlock(flags);
 241                         synth->flush(synth);
 242                         continue;
 243                 }
 244                 if (synth_buffer_empty()) {
 245                         spk_unlock(flags);
 246                         break;
 247                 }
 248                 ch = synth_buffer_peek();
 249                 set_current_state(TASK_INTERRUPTIBLE);
 250                 delay_time_val = delay_time->u.n.value;
 251                 synth_full_val = synth_full();
 252                 spk_unlock(flags);
 253                 if (ch == '\n')
 254                         ch = 0x0D;
 255                 if (synth_full_val || !spk_serial_out(ch)) {
 256                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 257                         continue;
 258                 }
 259                 set_current_state(TASK_RUNNING);
 260                 spk_lock(flags);
 261                 synth_buffer_getc();
 262                 spk_unlock(flags);
 263                 if (ch == '[')
 264                         in_escape = 1;
 265                 else if (ch == ']')
 266                         in_escape = 0;
 267                 else if (ch <= SPACE) {
 268                         if (!in_escape && strchr(",.!?;:", last))
 269                                 spk_serial_out(PROCSPEECH);
 270                         if (jiffies >= jiff_max) {
 271                                 if (!in_escape)
 272                                         spk_serial_out(PROCSPEECH);
 273                                 spk_lock(flags);
 274                                 jiffy_delta_val = jiffy_delta->u.n.value;
 275                                 delay_time_val = delay_time->u.n.value;
 276                                 spk_unlock(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         }
 294         in_escape = 0;
 295         is_flushing = 1;
 296         spk_serial_out(SYNTH_CLEAR);
 297 }
 298
 299 module_param_named(ser, synth_dectlk.ser, int, S_IRUGO);
 300 module_param_named(start, synth_dectlk.startup, short, S_IRUGO);
 301
 302 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
 303 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 304
 305 static int __init dectlk_init(void)
 306 {
 307         return synth_add(&synth_dectlk);
 308 }
 309
 310 static void __exit dectlk_exit(void)
 311 {
 312         synth_remove(&synth_dectlk);
 313 }
 314
 315 module_init(dectlk_init);
 316 module_exit(dectlk_exit);
 317 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 318 MODULE_AUTHOR("David Borowski");
 319 MODULE_DESCRIPTION("Speakup support for DECtalk Express synthesizers");
 320 MODULE_LICENSE("GPL");
 321 MODULE_VERSION(DRV_VERSION);
 322