1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * originally written by: Kirk Reiser <kirk@braille.uwo.ca> 4 * this version considerably modified by David Borowski, david575@rogers.com 5 * 6 * Copyright (C) 1998-99 Kirk Reiser. 7 * Copyright (C) 2003 David Borowski. 8 * 9 * specificly written as a driver for the speakup screenreview 10 * s not a general device driver. 11 */ 12 #include <linux/unistd.h> 13 #include <linux/proc_fs.h> 14 #include <linux/jiffies.h> 15 #include <linux/spinlock.h> 16 #include <linux/sched.h> 17 #include <linux/timer.h> 18 #include <linux/kthread.h> 19 #include "speakup.h" 20 #include "spk_priv.h" 21 22 #define DRV_VERSION "2.20" 23 #define SYNTH_CLEAR 0x03 24 #define PROCSPEECH 0x0b 25 static int xoff; 26 27 static inline int synth_full(void) 28 { 29 return xoff; 30 } 31 32 static void do_catch_up(struct spk_synth *synth); 33 static void synth_flush(struct spk_synth *synth); 34 static void read_buff_add(u_char c); 35 static unsigned char get_index(struct spk_synth *synth); 36 37 static int in_escape; 38 static int is_flushing; 39 40 static DEFINE_SPINLOCK(flush_lock); 41 static DECLARE_WAIT_QUEUE_HEAD(flush); 42 43 static struct var_t vars[] = { 44 { CAPS_START, .u.s = {"[:dv ap 160] " } }, 45 { CAPS_STOP, .u.s = {"[:dv ap 100 ] " } }, 46 { RATE, .u.n = {"[:ra %d] ", 180, 75, 650, 0, 0, NULL } }, 47 { INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } }, 48 { VOL, .u.n = {"[:dv g5 %d] ", 86, 60, 86, 0, 0, NULL } }, 49 { PUNCT, .u.n = {"[:pu %c] ", 0, 0, 2, 0, 0, "nsa" } }, 50 { VOICE, .u.n = {"[:n%c] ", 0, 0, 9, 0, 0, "phfdburwkv" } }, 51 { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } }, 52 V_LAST_VAR 53 }; 54 55 /* 56 * These attributes will appear in /sys/accessibility/speakup/dectlk. 57 */ 58 static struct kobj_attribute caps_start_attribute = 59 __ATTR(caps_start, 0644, spk_var_show, spk_var_store); 60 static struct kobj_attribute caps_stop_attribute = 61 __ATTR(caps_stop, 0644, spk_var_show, spk_var_store); 62 static struct kobj_attribute pitch_attribute = 63 __ATTR(pitch, 0644, spk_var_show, spk_var_store); 64 static struct kobj_attribute inflection_attribute = 65 __ATTR(inflection, 0644, spk_var_show, spk_var_store); 66 static struct kobj_attribute punct_attribute = 67 __ATTR(punct, 0644, spk_var_show, spk_var_store); 68 static struct kobj_attribute rate_attribute = 69 __ATTR(rate, 0644, spk_var_show, spk_var_store); 70 static struct kobj_attribute voice_attribute = 71 __ATTR(voice, 0644, spk_var_show, spk_var_store); 72 static struct kobj_attribute vol_attribute = 73 __ATTR(vol, 0644, spk_var_show, spk_var_store); 74 75 static struct kobj_attribute delay_time_attribute = 76 __ATTR(delay_time, 0644, spk_var_show, spk_var_store); 77 static struct kobj_attribute direct_attribute = 78 __ATTR(direct, 0644, spk_var_show, spk_var_store); 79 static struct kobj_attribute full_time_attribute = 80 __ATTR(full_time, 0644, spk_var_show, spk_var_store); 81 static struct kobj_attribute jiffy_delta_attribute = 82 __ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store); 83 static struct kobj_attribute trigger_time_attribute = 84 __ATTR(trigger_time, 0644, spk_var_show, spk_var_store); 85 86 /* 87 * Create a group of attributes so that we can create and destroy them all 88 * at once. 89 */ 90 static struct attribute *synth_attrs[] = { 91 &caps_start_attribute.attr, 92 &caps_stop_attribute.attr, 93 &pitch_attribute.attr, 94 &inflection_attribute.attr, 95 &punct_attribute.attr, 96 &rate_attribute.attr, 97 &voice_attribute.attr, 98 &vol_attribute.attr, 99 &delay_time_attribute.attr, 100 &direct_attribute.attr, 101 &full_time_attribute.attr, 102 &jiffy_delta_attribute.attr, 103 &trigger_time_attribute.attr, 104 NULL, /* need to NULL terminate the list of attributes */ 105 }; 106 107 static int ap_defaults[] = {122, 89, 155, 110, 208, 240, 200, 106, 306}; 108 static int g5_defaults[] = {86, 81, 86, 84, 81, 80, 83, 83, 73}; 109 110 static struct spk_synth synth_dectlk = { 111 .name = "dectlk", 112 .version = DRV_VERSION, 113 .long_name = "Dectalk Express", 114 .init = "[:error sp :name paul :rate 180 :tsr off] ", 115 .procspeech = PROCSPEECH, 116 .clear = SYNTH_CLEAR, 117 .delay = 500, 118 .trigger = 50, 119 .jiffies = 50, 120 .full = 40000, 121 .dev_name = SYNTH_DEFAULT_DEV, 122 .startup = SYNTH_START, 123 .checkval = SYNTH_CHECK, 124 .vars = vars, 125 .default_pitch = ap_defaults, 126 .default_vol = g5_defaults, 127 .io_ops = &spk_ttyio_ops, 128 .probe = spk_ttyio_synth_probe, 129 .release = spk_ttyio_release, 130 .synth_immediate = spk_ttyio_synth_immediate, 131 .catch_up = do_catch_up, 132 .flush = synth_flush, 133 .is_alive = spk_synth_is_alive_restart, 134 .synth_adjust = NULL, 135 .read_buff_add = read_buff_add, 136 .get_index = get_index, 137 .indexing = { 138 .command = "[:in re %d ] ", 139 .lowindex = 1, 140 .highindex = 8, 141 .currindex = 1, 142 }, 143 .attributes = { 144 .attrs = synth_attrs, 145 .name = "dectlk", 146 }, 147 }; 148 149 static int is_indnum(u_char *ch) 150 { 151 if ((*ch >= '0') && (*ch <= '9')) { 152 *ch = *ch - '0'; 153 return 1; 154 } 155 return 0; 156 } 157 158 static u_char lastind; 159 160 static unsigned char get_index(struct spk_synth *synth) 161 { 162 u_char rv; 163 164 rv = lastind; 165 lastind = 0; 166 return rv; 167 } 168 169 static void read_buff_add(u_char c) 170 { 171 static int ind = -1; 172 173 if (c == 0x01) { 174 unsigned long flags; 175 176 spin_lock_irqsave(&flush_lock, flags); 177 is_flushing = 0; 178 wake_up_interruptible(&flush); 179 spin_unlock_irqrestore(&flush_lock, flags); 180 } else if (c == 0x13) { 181 xoff = 1; 182 } else if (c == 0x11) { 183 xoff = 0; 184 } else if (is_indnum(&c)) { 185 if (ind == -1) 186 ind = c; 187 else 188 ind = ind * 10 + c; 189 } else if ((c > 31) && (c < 127)) { 190 if (ind != -1) 191 lastind = (u_char)ind; 192 ind = -1; 193 } 194 } 195 196 static void do_catch_up(struct spk_synth *synth) 197 { 198 int synth_full_val = 0; 199 static u_char ch; 200 static u_char last = '\0'; 201 unsigned long flags; 202 unsigned long jiff_max; 203 unsigned long timeout = msecs_to_jiffies(4000); 204 DEFINE_WAIT(wait); 205 struct var_t *jiffy_delta; 206 struct var_t *delay_time; 207 int jiffy_delta_val; 208 int delay_time_val; 209 210 jiffy_delta = spk_get_var(JIFFY); 211 delay_time = spk_get_var(DELAY); 212 spin_lock_irqsave(&speakup_info.spinlock, flags); 213 jiffy_delta_val = jiffy_delta->u.n.value; 214 spin_unlock_irqrestore(&speakup_info.spinlock, flags); 215 jiff_max = jiffies + jiffy_delta_val; 216 217 while (!kthread_should_stop()) { 218 /* if no ctl-a in 4, send data anyway */ 219 spin_lock_irqsave(&flush_lock, flags); 220 while (is_flushing && timeout) { 221 prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE); 222 spin_unlock_irqrestore(&flush_lock, flags); 223 timeout = schedule_timeout(timeout); 224 spin_lock_irqsave(&flush_lock, flags); 225 } 226 finish_wait(&flush, &wait); 227 is_flushing = 0; 228 spin_unlock_irqrestore(&flush_lock, flags); 229 230 spin_lock_irqsave(&speakup_info.spinlock, flags); 231 if (speakup_info.flushing) { 232 speakup_info.flushing = 0; 233 spin_unlock_irqrestore(&speakup_info.spinlock, flags); 234 synth->flush(synth); 235 continue; 236 } 237 synth_buffer_skip_nonlatin1(); 238 if (synth_buffer_empty()) { 239 spin_unlock_irqrestore(&speakup_info.spinlock, flags); 240 break; 241 } 242 ch = synth_buffer_peek(); 243 set_current_state(TASK_INTERRUPTIBLE); 244 delay_time_val = delay_time->u.n.value; 245 synth_full_val = synth_full(); 246 spin_unlock_irqrestore(&speakup_info.spinlock, flags); 247 if (ch == '\n') 248 ch = 0x0D; 249 if (synth_full_val || !synth->io_ops->synth_out(synth, ch)) { 250 schedule_timeout(msecs_to_jiffies(delay_time_val)); 251 continue; 252 } 253 set_current_state(TASK_RUNNING); 254 spin_lock_irqsave(&speakup_info.spinlock, flags); 255 synth_buffer_getc(); 256 spin_unlock_irqrestore(&speakup_info.spinlock, flags); 257 if (ch == '[') { 258 in_escape = 1; 259 } else if (ch == ']') { 260 in_escape = 0; 261 } else if (ch <= SPACE) { 262 if (!in_escape && strchr(",.!?;:", last)) 263 synth->io_ops->synth_out(synth, PROCSPEECH); 264 if (time_after_eq(jiffies, jiff_max)) { 265 if (!in_escape) 266 synth->io_ops->synth_out(synth, 267 PROCSPEECH); 268 spin_lock_irqsave(&speakup_info.spinlock, 269 flags); 270 jiffy_delta_val = jiffy_delta->u.n.value; 271 delay_time_val = delay_time->u.n.value; 272 spin_unlock_irqrestore(&speakup_info.spinlock, 273 flags); 274 schedule_timeout(msecs_to_jiffies 275 (delay_time_val)); 276 jiff_max = jiffies + jiffy_delta_val; 277 } 278 } 279 last = ch; 280 } 281 if (!in_escape) 282 synth->io_ops->synth_out(synth, PROCSPEECH); 283 } 284 285 static void synth_flush(struct spk_synth *synth) 286 { 287 if (in_escape) 288 /* if in command output ']' so we don't get an error */ 289 synth->io_ops->synth_out(synth, ']'); 290 in_escape = 0; 291 is_flushing = 1; 292 synth->io_ops->flush_buffer(); 293 synth->io_ops->synth_out(synth, SYNTH_CLEAR); 294 } 295 296 module_param_named(ser, synth_dectlk.ser, int, 0444); 297 module_param_named(dev, synth_dectlk.dev_name, charp, 0444); 298 module_param_named(start, synth_dectlk.startup, short, 0444); 299 300 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based)."); 301 MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer."); 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); 311 312