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 * specifically written as a driver for the speakup screenreview
10 * s not a general device driver.
11 */
12#include <linux/jiffies.h>
13#include <linux/sched.h>
14#include <linux/timer.h>
15#include <linux/kthread.h>
16
17#include "spk_priv.h"
18#include "speakup.h"
19
20#define DRV_VERSION "2.14"
21#define SYNTH_CLEAR 0x03
22#define PROCSPEECH 0x0b
23
24static volatile unsigned char last_char;
25
26static void read_buff_add(u_char ch)
27{
28 last_char = ch;
29}
30
31static inline bool synth_full(void)
32{
33 return last_char == 0x13;
34}
35
36static void do_catch_up(struct spk_synth *synth);
37static void synth_flush(struct spk_synth *synth);
38
39static int in_escape;
40
41
42enum default_vars_id {
43 CAPS_START_ID = 0, CAPS_STOP_ID,
44 RATE_ID, PITCH_ID, INFLECTION_ID,
45 VOL_ID, PUNCT_ID, VOICE_ID,
46 DIRECT_ID, V_LAST_ID,
47 NB_ID,
48};
49
50static struct var_t vars[NB_ID] = {
51 [CAPS_START_ID] = { CAPS_START, .u.s = {"[:dv ap 222]" } },
52 [CAPS_STOP_ID] = { .var_id: CAPS_STOP, .u.s = {"[:dv ap 100]" } },
53 [RATE_ID] = { .var_id: RATE, .u.n = {"[:ra %d]", 7, 0, 9, 150, 25, NULL } },
54 [PITCH_ID] = { .var_id: PITCH, .u.n = {"[:dv ap %d]", 100, 0, 100, 0, 0, NULL } },
55 [INFLECTION_ID] = { .var_id: INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } },
56 [VOL_ID] = { .var_id: VOL, .u.n = {"[:dv gv %d]", 13, 0, 16, 0, 5, NULL } },
57 [PUNCT_ID] = { .var_id: PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" } },
58 [VOICE_ID] = { .var_id: VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" } },
59 [DIRECT_ID] = { .var_id: DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
60 V_LAST_VAR
61};
62
63/*
64 * These attributes will appear in /sys/accessibility/speakup/decext.
65 */
66static struct kobj_attribute caps_start_attribute =
67 __ATTR(caps_start, 0644, spk_var_show, spk_var_store);
68static struct kobj_attribute caps_stop_attribute =
69 __ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
70static struct kobj_attribute pitch_attribute =
71 __ATTR(pitch, 0644, spk_var_show, spk_var_store);
72static struct kobj_attribute inflection_attribute =
73 __ATTR(inflection, 0644, spk_var_show, spk_var_store);
74static struct kobj_attribute punct_attribute =
75 __ATTR(punct, 0644, spk_var_show, spk_var_store);
76static struct kobj_attribute rate_attribute =
77 __ATTR(rate, 0644, spk_var_show, spk_var_store);
78static struct kobj_attribute voice_attribute =
79 __ATTR(voice, 0644, spk_var_show, spk_var_store);
80static struct kobj_attribute vol_attribute =
81 __ATTR(vol, 0644, spk_var_show, spk_var_store);
82
83static struct kobj_attribute delay_time_attribute =
84 __ATTR(delay_time, 0644, spk_var_show, spk_var_store);
85static struct kobj_attribute direct_attribute =
86 __ATTR(direct, 0644, spk_var_show, spk_var_store);
87static struct kobj_attribute full_time_attribute =
88 __ATTR(full_time, 0644, spk_var_show, spk_var_store);
89static struct kobj_attribute jiffy_delta_attribute =
90 __ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
91static struct kobj_attribute trigger_time_attribute =
92 __ATTR(trigger_time, 0644, 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 */
98static struct attribute *synth_attrs[] = {
99 &caps_start_attribute.attr,
100 &caps_stop_attribute.attr,
101 &pitch_attribute.attr,
102 &inflection_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
115static 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 .dev_name = SYNTH_DEFAULT_DEV,
128 .startup = SYNTH_START,
129 .checkval = SYNTH_CHECK,
130 .vars = vars,
131 .io_ops = &spk_ttyio_ops,
132 .probe = spk_ttyio_synth_probe,
133 .release = spk_ttyio_release,
134 .synth_immediate = spk_ttyio_synth_immediate,
135 .catch_up = do_catch_up,
136 .flush = synth_flush,
137 .is_alive = spk_synth_is_alive_restart,
138 .synth_adjust = NULL,
139 .read_buff_add = read_buff_add,
140 .get_index = NULL,
141 .indexing = {
142 .command = NULL,
143 .lowindex = 0,
144 .highindex = 0,
145 .currindex = 0,
146 },
147 .attributes = {
148 .attrs = synth_attrs,
149 .name = "decext",
150 },
151};
152
153static void do_catch_up(struct spk_synth *synth)
154{
155 u_char ch;
156 static u_char last = '\0';
157 unsigned long flags;
158 unsigned long jiff_max;
159 struct var_t *jiffy_delta;
160 struct var_t *delay_time;
161 int jiffy_delta_val = 0;
162 int delay_time_val = 0;
163
164 jiffy_delta = spk_get_var(var_id: JIFFY);
165 delay_time = spk_get_var(var_id: DELAY);
166
167 spin_lock_irqsave(&speakup_info.spinlock, flags);
168 jiffy_delta_val = jiffy_delta->u.n.value;
169 spin_unlock_irqrestore(lock: &speakup_info.spinlock, flags);
170 jiff_max = jiffies + jiffy_delta_val;
171
172 while (!kthread_should_stop()) {
173 spin_lock_irqsave(&speakup_info.spinlock, flags);
174 if (speakup_info.flushing) {
175 speakup_info.flushing = 0;
176 spin_unlock_irqrestore(lock: &speakup_info.spinlock, flags);
177 synth->flush(synth);
178 continue;
179 }
180 synth_buffer_skip_nonlatin1();
181 if (synth_buffer_empty()) {
182 spin_unlock_irqrestore(lock: &speakup_info.spinlock, flags);
183 break;
184 }
185 ch = synth_buffer_peek();
186 set_current_state(TASK_INTERRUPTIBLE);
187 delay_time_val = delay_time->u.n.value;
188 spin_unlock_irqrestore(lock: &speakup_info.spinlock, flags);
189 if (ch == '\n')
190 ch = 0x0D;
191 if (synth_full() || !synth->io_ops->synth_out(synth, ch)) {
192 schedule_timeout(timeout: msecs_to_jiffies(m: delay_time_val));
193 continue;
194 }
195 set_current_state(TASK_RUNNING);
196 spin_lock_irqsave(&speakup_info.spinlock, flags);
197 synth_buffer_getc();
198 spin_unlock_irqrestore(lock: &speakup_info.spinlock, flags);
199 if (ch == '[') {
200 in_escape = 1;
201 } else if (ch == ']') {
202 in_escape = 0;
203 } else if (ch <= SPACE) {
204 if (!in_escape && strchr(",.!?;:", last))
205 synth->io_ops->synth_out(synth, PROCSPEECH);
206 if (time_after_eq(jiffies, jiff_max)) {
207 if (!in_escape)
208 synth->io_ops->synth_out(synth,
209 PROCSPEECH);
210 spin_lock_irqsave(&speakup_info.spinlock,
211 flags);
212 jiffy_delta_val = jiffy_delta->u.n.value;
213 delay_time_val = delay_time->u.n.value;
214 spin_unlock_irqrestore(lock: &speakup_info.spinlock,
215 flags);
216 schedule_timeout(timeout: msecs_to_jiffies
217 (m: delay_time_val));
218 jiff_max = jiffies + jiffy_delta_val;
219 }
220 }
221 last = ch;
222 }
223 if (!in_escape)
224 synth->io_ops->synth_out(synth, PROCSPEECH);
225}
226
227static void synth_flush(struct spk_synth *synth)
228{
229 in_escape = 0;
230 synth->io_ops->flush_buffer(synth);
231 synth->synth_immediate(synth, "\033P;10z\033\\");
232}
233
234module_param_named(ser, synth_decext.ser, int, 0444);
235module_param_named(dev, synth_decext.dev_name, charp, 0444);
236module_param_named(start, synth_decext.startup, short, 0444);
237module_param_named(rate, vars[RATE_ID].u.n.default_val, int, 0444);
238module_param_named(pitch, vars[PITCH_ID].u.n.default_val, int, 0444);
239module_param_named(inflection, vars[INFLECTION_ID].u.n.default_val, int, 0444);
240module_param_named(vol, vars[VOL_ID].u.n.default_val, int, 0444);
241module_param_named(punct, vars[PUNCT_ID].u.n.default_val, int, 0444);
242module_param_named(voice, vars[VOICE_ID].u.n.default_val, int, 0444);
243module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);
244
245
246MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
247MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
248MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
249MODULE_PARM_DESC(rate, "Set the rate variable on load.");
250MODULE_PARM_DESC(pitch, "Set the pitch variable on load.");
251MODULE_PARM_DESC(inflection, "Set the inflection variable on load.");
252MODULE_PARM_DESC(vol, "Set the vol variable on load.");
253MODULE_PARM_DESC(punct, "Set the punct variable on load.");
254MODULE_PARM_DESC(voice, "Set the voice variable on load.");
255MODULE_PARM_DESC(direct, "Set the direct variable on load.");
256
257module_spk_synth(synth_decext);
258
259MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
260MODULE_AUTHOR("David Borowski");
261MODULE_DESCRIPTION("Speakup support for DECtalk External synthesizers");
262MODULE_LICENSE("GPL");
263MODULE_VERSION(DRV_VERSION);
264
265

source code of linux/drivers/accessibility/speakup/speakup_decext.c