drivers/accessibility/speakup/speakup_acntpc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * 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  * this code is specificly written as a driver for the speakup screenreview
  10  * package and is not a general device driver.
  11  * This driver is for the Aicom Acent PC internal synthesizer.
  12  */
  13
  14 #include <linux/jiffies.h>
  15 #include <linux/sched.h>
  16 #include <linux/timer.h>
  17 #include <linux/kthread.h>
  18
  19 #include "spk_priv.h"
  20 #include "serialio.h"
  21 #include "speakup.h"
  22 #include "speakup_acnt.h" /* local header file for Accent values */
  23
  24 #define DRV_VERSION "2.10"
  25 #define PROCSPEECH '\r'
  26
  27 static int synth_probe(struct spk_synth *synth);
  28 static void accent_release(void);
  29 static const char *synth_immediate(struct spk_synth *synth, const char *buf);
  30 static void do_catch_up(struct spk_synth *synth);
  31 static void synth_flush(struct spk_synth *synth);
  32
  33 static int synth_port_control;
  34 static int port_forced;
  35 static unsigned int synth_portlist[] = { 0x2a8, 0 };
  36
  37 static struct var_t vars[] = {
  38         { CAPS_START, .u.s = {"\033P8" } },
  39         { CAPS_STOP, .u.s = {"\033P5" } },
  40         { RATE, .u.n = {"\033R%c", 9, 0, 17, 0, 0, "0123456789abcdefgh" } },
  41         { PITCH, .u.n = {"\033P%d", 5, 0, 9, 0, 0, NULL } },
  42         { VOL, .u.n = {"\033A%d", 5, 0, 9, 0, 0, NULL } },
  43         { TONE, .u.n = {"\033V%d", 5, 0, 9, 0, 0, NULL } },
  44         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  45         V_LAST_VAR
  46 };
  47
  48 /*
  49  * These attributes will appear in /sys/accessibility/speakup/acntpc.
  50  */
  51 static struct kobj_attribute caps_start_attribute =
  52         __ATTR(caps_start, 0644, spk_var_show, spk_var_store);
  53 static struct kobj_attribute caps_stop_attribute =
  54         __ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
  55 static struct kobj_attribute pitch_attribute =
  56         __ATTR(pitch, 0644, spk_var_show, spk_var_store);
  57 static struct kobj_attribute rate_attribute =
  58         __ATTR(rate, 0644, spk_var_show, spk_var_store);
  59 static struct kobj_attribute tone_attribute =
  60         __ATTR(tone, 0644, spk_var_show, spk_var_store);
  61 static struct kobj_attribute vol_attribute =
  62         __ATTR(vol, 0644, spk_var_show, spk_var_store);
  63
  64 static struct kobj_attribute delay_time_attribute =
  65         __ATTR(delay_time, 0644, spk_var_show, spk_var_store);
  66 static struct kobj_attribute direct_attribute =
  67         __ATTR(direct, 0644, spk_var_show, spk_var_store);
  68 static struct kobj_attribute full_time_attribute =
  69         __ATTR(full_time, 0644, spk_var_show, spk_var_store);
  70 static struct kobj_attribute jiffy_delta_attribute =
  71         __ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
  72 static struct kobj_attribute trigger_time_attribute =
  73         __ATTR(trigger_time, 0644, spk_var_show, spk_var_store);
  74
  75 /*
  76  * Create a group of attributes so that we can create and destroy them all
  77  * at once.
  78  */
  79 static struct attribute *synth_attrs[] = {
  80         &caps_start_attribute.attr,
  81         &caps_stop_attribute.attr,
  82         &pitch_attribute.attr,
  83         &rate_attribute.attr,
  84         &tone_attribute.attr,
  85         &vol_attribute.attr,
  86         &delay_time_attribute.attr,
  87         &direct_attribute.attr,
  88         &full_time_attribute.attr,
  89         &jiffy_delta_attribute.attr,
  90         &trigger_time_attribute.attr,
  91         NULL,   /* need to NULL terminate the list of attributes */
  92 };
  93
  94 static struct spk_synth synth_acntpc = {
  95         .name = "acntpc",
  96         .version = DRV_VERSION,
  97         .long_name = "Accent PC",
  98         .init = "\033=X \033Oi\033T2\033=M\033N1\n",
  99         .procspeech = PROCSPEECH,
 100         .clear = SYNTH_CLEAR,
 101         .delay = 500,
 102         .trigger = 50,
 103         .jiffies = 50,
 104         .full = 1000,
 105         .startup = SYNTH_START,
 106         .checkval = SYNTH_CHECK,
 107         .vars = vars,
 108         .io_ops = &spk_serial_io_ops,
 109         .probe = synth_probe,
 110         .release = accent_release,
 111         .synth_immediate = synth_immediate,
 112         .catch_up = do_catch_up,
 113         .flush = synth_flush,
 114         .is_alive = spk_synth_is_alive_nop,
 115         .synth_adjust = NULL,
 116         .read_buff_add = NULL,
 117         .get_index = NULL,
 118         .indexing = {
 119                 .command = NULL,
 120                 .lowindex = 0,
 121                 .highindex = 0,
 122                 .currindex = 0,
 123         },
 124         .attributes = {
 125                 .attrs = synth_attrs,
 126                 .name = "acntpc",
 127         },
 128 };
 129
 130 static inline bool synth_writable(void)
 131 {
 132         return inb_p(synth_port_control) & SYNTH_WRITABLE;
 133 }
 134
 135 static inline bool synth_full(void)
 136 {
 137         return inb_p(speakup_info.port_tts + UART_RX) == 'F';
 138 }
 139
 140 static const char *synth_immediate(struct spk_synth *synth, const char *buf)
 141 {
 142         u_char ch;
 143
 144         while ((ch = *buf)) {
 145                 int timeout = SPK_XMITR_TIMEOUT;
 146
 147                 if (ch == '\n')
 148                         ch = PROCSPEECH;
 149                 if (synth_full())
 150                         return buf;
 151                 while (synth_writable()) {
 152                         if (!--timeout)
 153                                 return buf;
 154                         udelay(1);
 155                 }
 156                 outb_p(ch, speakup_info.port_tts);
 157                 buf++;
 158         }
 159         return NULL;
 160 }
 161
 162 static void do_catch_up(struct spk_synth *synth)
 163 {
 164         u_char ch;
 165         unsigned long flags;
 166         unsigned long jiff_max;
 167         int timeout;
 168         int delay_time_val;
 169         int jiffy_delta_val;
 170         int full_time_val;
 171         struct var_t *delay_time;
 172         struct var_t *full_time;
 173         struct var_t *jiffy_delta;
 174
 175         jiffy_delta = spk_get_var(JIFFY);
 176         delay_time = spk_get_var(DELAY);
 177         full_time = spk_get_var(FULL);
 178
 179         spin_lock_irqsave(&speakup_info.spinlock, flags);
 180         jiffy_delta_val = jiffy_delta->u.n.value;
 181         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 182
 183         jiff_max = jiffies + jiffy_delta_val;
 184         while (!kthread_should_stop()) {
 185                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 186                 if (speakup_info.flushing) {
 187                         speakup_info.flushing = 0;
 188                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 189                         synth->flush(synth);
 190                         continue;
 191                 }
 192                 synth_buffer_skip_nonlatin1();
 193                 if (synth_buffer_empty()) {
 194                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 195                         break;
 196                 }
 197                 set_current_state(TASK_INTERRUPTIBLE);
 198                 full_time_val = full_time->u.n.value;
 199                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 200                 if (synth_full()) {
 201                         schedule_timeout(msecs_to_jiffies(full_time_val));
 202                         continue;
 203                 }
 204                 set_current_state(TASK_RUNNING);
 205                 timeout = SPK_XMITR_TIMEOUT;
 206                 while (synth_writable()) {
 207                         if (!--timeout)
 208                                 break;
 209                         udelay(1);
 210                 }
 211                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 212                 ch = synth_buffer_getc();
 213                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 214                 if (ch == '\n')
 215                         ch = PROCSPEECH;
 216                 outb_p(ch, speakup_info.port_tts);
 217                 if (time_after_eq(jiffies, jiff_max) && ch == SPACE) {
 218                         timeout = SPK_XMITR_TIMEOUT;
 219                         while (synth_writable()) {
 220                                 if (!--timeout)
 221                                         break;
 222                                 udelay(1);
 223                         }
 224                         outb_p(PROCSPEECH, speakup_info.port_tts);
 225                         spin_lock_irqsave(&speakup_info.spinlock, flags);
 226                         jiffy_delta_val = jiffy_delta->u.n.value;
 227                         delay_time_val = delay_time->u.n.value;
 228                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 229                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 230                         jiff_max = jiffies + jiffy_delta_val;
 231                 }
 232         }
 233         timeout = SPK_XMITR_TIMEOUT;
 234         while (synth_writable()) {
 235                 if (!--timeout)
 236                         break;
 237                 udelay(1);
 238         }
 239         outb_p(PROCSPEECH, speakup_info.port_tts);
 240 }
 241
 242 static void synth_flush(struct spk_synth *synth)
 243 {
 244         outb_p(SYNTH_CLEAR, speakup_info.port_tts);
 245 }
 246
 247 static int synth_probe(struct spk_synth *synth)
 248 {
 249         unsigned int port_val = 0;
 250         int i = 0;
 251
 252         pr_info("Probing for %s.\n", synth->long_name);
 253         if (port_forced) {
 254                 speakup_info.port_tts = port_forced;
 255                 pr_info("probe forced to %x by kernel command line\n",
 256                         speakup_info.port_tts);
 257                 if (synth_request_region(speakup_info.port_tts - 1,
 258                                          SYNTH_IO_EXTENT)) {
 259                         pr_warn("sorry, port already reserved\n");
 260                         return -EBUSY;
 261                 }
 262                 port_val = inw(speakup_info.port_tts - 1);
 263                 synth_port_control = speakup_info.port_tts - 1;
 264         } else {
 265                 for (i = 0; synth_portlist[i]; i++) {
 266                         if (synth_request_region(synth_portlist[i],
 267                                                  SYNTH_IO_EXTENT)) {
 268                                 pr_warn
 269                                     ("request_region: failed with 0x%x, %d\n",
 270                                      synth_portlist[i], SYNTH_IO_EXTENT);
 271                                 continue;
 272                         }
 273                         port_val = inw(synth_portlist[i]) & 0xfffc;
 274                         if (port_val == 0x53fc) {
 275                                 /* 'S' and out&input bits */
 276                                 synth_port_control = synth_portlist[i];
 277                                 speakup_info.port_tts = synth_port_control + 1;
 278                                 break;
 279                         }
 280                 }
 281         }
 282         port_val &= 0xfffc;
 283         if (port_val != 0x53fc) {
 284                 /* 'S' and out&input bits */
 285                 pr_info("%s: not found\n", synth->long_name);
 286                 synth_release_region(synth_port_control, SYNTH_IO_EXTENT);
 287                 synth_port_control = 0;
 288                 return -ENODEV;
 289         }
 290         pr_info("%s: %03x-%03x, driver version %s,\n", synth->long_name,
 291                 synth_port_control, synth_port_control + SYNTH_IO_EXTENT - 1,
 292                 synth->version);
 293         synth->alive = 1;
 294         return 0;
 295 }
 296
 297 static void accent_release(void)
 298 {
 299         spk_stop_serial_interrupt();
 300         if (speakup_info.port_tts)
 301                 synth_release_region(speakup_info.port_tts - 1,
 302                                      SYNTH_IO_EXTENT);
 303         speakup_info.port_tts = 0;
 304 }
 305
 306 module_param_hw_named(port, port_forced, int, ioport, 0444);
 307 module_param_named(start, synth_acntpc.startup, short, 0444);
 308
 309 MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
 310 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 311
 312 module_spk_synth(synth_acntpc);
 313
 314 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 315 MODULE_AUTHOR("David Borowski");
 316 MODULE_DESCRIPTION("Speakup support for Accent PC synthesizer");
 317 MODULE_LICENSE("GPL");
 318 MODULE_VERSION(DRV_VERSION);
 319