drivers/staging/speakup/speakup_decext.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/jiffies.h>
  22 #include <linux/sched.h>
  23 #include <linux/timer.h>
  24 #include <linux/kthread.h>
  25
  26 #include "spk_priv.h"
  27 #include "serialio.h"
  28 #include "speakup.h"
  29
  30 #define DRV_VERSION "2.14"
  31 #define SYNTH_CLEAR 0x03
  32 #define PROCSPEECH 0x0b
  33 static unsigned char last_char;
  34
  35 static inline u_char get_last_char(void)
  36 {
  37         u_char avail = inb_p(speakup_info.port_tts + UART_LSR) & UART_LSR_DR;
  38
  39         if (avail)
  40                 last_char = inb_p(speakup_info.port_tts + UART_RX);
  41         return last_char;
  42 }
  43
  44 static inline bool synth_full(void)
  45 {
  46         return get_last_char() == 0x13;
  47 }
  48
  49 static void do_catch_up(struct spk_synth *synth);
  50 static void synth_flush(struct spk_synth *synth);
  51
  52 static int in_escape;
  53
  54 static struct var_t vars[] = {
  55         { CAPS_START, .u.s = {"[:dv ap 222]" } },
  56         { CAPS_STOP, .u.s = {"[:dv ap 100]" } },
  57         { RATE, .u.n = {"[:ra %d]", 7, 0, 9, 150, 25, NULL } },
  58         { PITCH, .u.n = {"[:dv ap %d]", 100, 0, 100, 0, 0, NULL } },
  59         { VOL, .u.n = {"[:dv gv %d]", 13, 0, 16, 0, 5, NULL } },
  60         { PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" } },
  61         { VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" } },
  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/decext.
  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 pitch_attribute =
  74         __ATTR(pitch, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  75 static struct kobj_attribute punct_attribute =
  76         __ATTR(punct, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  77 static struct kobj_attribute rate_attribute =
  78         __ATTR(rate, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  79 static struct kobj_attribute voice_attribute =
  80         __ATTR(voice, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  81 static struct kobj_attribute vol_attribute =
  82         __ATTR(vol, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  83
  84 static struct kobj_attribute delay_time_attribute =
  85         __ATTR(delay_time, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  86 static struct kobj_attribute direct_attribute =
  87         __ATTR(direct, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  88 static struct kobj_attribute full_time_attribute =
  89         __ATTR(full_time, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  90 static struct kobj_attribute jiffy_delta_attribute =
  91         __ATTR(jiffy_delta, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  92 static struct kobj_attribute trigger_time_attribute =
  93         __ATTR(trigger_time, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
  94
  95 /*
  96  * Create a group of attributes so that we can create and destroy them all
  97  * at once.
  98  */
  99 static struct attribute *synth_attrs[] = {
 100         &caps_start_attribute.attr,
 101         &caps_stop_attribute.attr,
 102         &pitch_attribute.attr,
 103         &punct_attribute.attr,
 104         &rate_attribute.attr,
 105         &voice_attribute.attr,
 106         &vol_attribute.attr,
 107         &delay_time_attribute.attr,
 108         &direct_attribute.attr,
 109         &full_time_attribute.attr,
 110         &jiffy_delta_attribute.attr,
 111         &trigger_time_attribute.attr,
 112         NULL,   /* need to NULL terminate the list of attributes */
 113 };
 114
 115 static struct spk_synth synth_decext = {
 116         .name = "decext",
 117         .version = DRV_VERSION,
 118         .long_name = "Dectalk External",
 119         .init = "[:pe -380]",
 120         .procspeech = PROCSPEECH,
 121         .clear = SYNTH_CLEAR,
 122         .delay = 500,
 123         .trigger = 50,
 124         .jiffies = 50,
 125         .full = 40000,
 126         .flags = SF_DEC,
 127         .startup = SYNTH_START,
 128         .checkval = SYNTH_CHECK,
 129         .vars = vars,
 130         .probe = spk_serial_synth_probe,
 131         .release = spk_serial_release,
 132         .synth_immediate = spk_synth_immediate,
 133         .catch_up = do_catch_up,
 134         .flush = synth_flush,
 135         .is_alive = spk_synth_is_alive_restart,
 136         .synth_adjust = NULL,
 137         .read_buff_add = NULL,
 138         .get_index = NULL,
 139         .indexing = {
 140                 .command = NULL,
 141                 .lowindex = 0,
 142                 .highindex = 0,
 143                 .currindex = 0,
 144         },
 145         .attributes = {
 146                 .attrs = synth_attrs,
 147                 .name = "decext",
 148         },
 149 };
 150
 151 static void do_catch_up(struct spk_synth *synth)
 152 {
 153         u_char ch;
 154         static u_char last = '\0';
 155         unsigned long flags;
 156         unsigned long jiff_max;
 157         struct var_t *jiffy_delta;
 158         struct var_t *delay_time;
 159         int jiffy_delta_val = 0;
 160         int delay_time_val = 0;
 161
 162         jiffy_delta = spk_get_var(JIFFY);
 163         delay_time = spk_get_var(DELAY);
 164
 165         spin_lock_irqsave(&speakup_info.spinlock, flags);
 166         jiffy_delta_val = jiffy_delta->u.n.value;
 167         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 168         jiff_max = jiffies + jiffy_delta_val;
 169
 170         while (!kthread_should_stop()) {
 171                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 172                 if (speakup_info.flushing) {
 173                         speakup_info.flushing = 0;
 174                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 175                         synth->flush(synth);
 176                         continue;
 177                 }
 178                 if (synth_buffer_empty()) {
 179                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 180                         break;
 181                 }
 182                 ch = synth_buffer_peek();
 183                 set_current_state(TASK_INTERRUPTIBLE);
 184                 delay_time_val = delay_time->u.n.value;
 185                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 186                 if (ch == '\n')
 187                         ch = 0x0D;
 188                 if (synth_full() || !spk_serial_out(ch)) {
 189                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 190                         continue;
 191                 }
 192                 set_current_state(TASK_RUNNING);
 193                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 194                 synth_buffer_getc();
 195                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 196                 if (ch == '[')
 197                         in_escape = 1;
 198                 else if (ch == ']')
 199                         in_escape = 0;
 200                 else if (ch <= SPACE) {
 201                         if (!in_escape && strchr(",.!?;:", last))
 202                                 spk_serial_out(PROCSPEECH);
 203                         if (time_after_eq(jiffies, jiff_max)) {
 204                                 if (!in_escape)
 205                                         spk_serial_out(PROCSPEECH);
 206                                 spin_lock_irqsave(&speakup_info.spinlock,
 207                                                         flags);
 208                                 jiffy_delta_val = jiffy_delta->u.n.value;
 209                                 delay_time_val = delay_time->u.n.value;
 210                                 spin_unlock_irqrestore(&speakup_info.spinlock,
 211                                                         flags);
 212                                 schedule_timeout(msecs_to_jiffies
 213                                                  (delay_time_val));
 214                                 jiff_max = jiffies + jiffy_delta_val;
 215                         }
 216                 }
 217                 last = ch;
 218         }
 219         if (!in_escape)
 220                 spk_serial_out(PROCSPEECH);
 221 }
 222
 223 static void synth_flush(struct spk_synth *synth)
 224 {
 225         in_escape = 0;
 226         spk_synth_immediate(synth, "\033P;10z\033\\");
 227 }
 228
 229 module_param_named(ser, synth_decext.ser, int, S_IRUGO);
 230 module_param_named(start, synth_decext.startup, short, S_IRUGO);
 231
 232 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
 233 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 234
 235 module_spk_synth(synth_decext);
 236
 237 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 238 MODULE_AUTHOR("David Borowski");
 239 MODULE_DESCRIPTION("Speakup support for DECtalk External synthesizers");
 240 MODULE_LICENSE("GPL");
 241 MODULE_VERSION(DRV_VERSION);
 242