kernel/drivers/staging/speakup/speakup_acntpc.c

   1 /*
   2  * 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  * this code is specificly written as a driver for the speakup screenreview
  23  * package and is not a general device driver.
  24  * This driver is for the Aicom Acent PC internal synthesizer.
  25  */
  26
  27 #include <linux/jiffies.h>
  28 #include <linux/sched.h>
  29 #include <linux/timer.h>
  30 #include <linux/kthread.h>
  31
  32 #include "spk_priv.h"
  33 #include "serialio.h"
  34 #include "speakup.h"
  35 #include "speakup_acnt.h" /* local header file for Accent values */
  36
  37 #define DRV_VERSION "2.10"
  38 #define PROCSPEECH '\r'
  39
  40 static int synth_probe(struct spk_synth *synth);
  41 static void accent_release(void);
  42 static const char *synth_immediate(struct spk_synth *synth, const char *buf);
  43 static void do_catch_up(struct spk_synth *synth);
  44 static void synth_flush(struct spk_synth *synth);
  45
  46 static int synth_port_control;
  47 static int port_forced;
  48 static unsigned int synth_portlist[] = { 0x2a8, 0 };
  49
  50 static struct var_t vars[] = {
  51         { CAPS_START, .u.s = {"\033P8" } },
  52         { CAPS_STOP, .u.s = {"\033P5" } },
  53         { RATE, .u.n = {"\033R%c", 9, 0, 17, 0, 0, "0123456789abcdefgh" } },
  54         { PITCH, .u.n = {"\033P%d", 5, 0, 9, 0, 0, NULL } },
  55         { VOL, .u.n = {"\033A%d", 5, 0, 9, 0, 0, NULL } },
  56         { TONE, .u.n = {"\033V%d", 5, 0, 9, 0, 0, NULL } },
  57         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  58         V_LAST_VAR
  59 };
  60
  61 /*
  62  * These attributes will appear in /sys/accessibility/speakup/acntpc.
  63  */
  64 static struct kobj_attribute caps_start_attribute =
  65         __ATTR(caps_start, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  66 static struct kobj_attribute caps_stop_attribute =
  67         __ATTR(caps_stop, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  68 static struct kobj_attribute pitch_attribute =
  69         __ATTR(pitch, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  70 static struct kobj_attribute rate_attribute =
  71         __ATTR(rate, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  72 static struct kobj_attribute tone_attribute =
  73         __ATTR(tone, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  74 static struct kobj_attribute vol_attribute =
  75         __ATTR(vol, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  76
  77 static struct kobj_attribute delay_time_attribute =
  78         __ATTR(delay_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  79 static struct kobj_attribute direct_attribute =
  80         __ATTR(direct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  81 static struct kobj_attribute full_time_attribute =
  82         __ATTR(full_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  83 static struct kobj_attribute jiffy_delta_attribute =
  84         __ATTR(jiffy_delta, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  85 static struct kobj_attribute trigger_time_attribute =
  86         __ATTR(trigger_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store);
  87
  88 /*
  89  * Create a group of attributes so that we can create and destroy them all
  90  * at once.
  91  */
  92 static struct attribute *synth_attrs[] = {
  93         &caps_start_attribute.attr,
  94         &caps_stop_attribute.attr,
  95         &pitch_attribute.attr,
  96         &rate_attribute.attr,
  97         &tone_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 struct spk_synth synth_acntpc = {
 108         .name = "acntpc",
 109         .version = DRV_VERSION,
 110         .long_name = "Accent PC",
 111         .init = "\033=X \033Oi\033T2\033=M\033N1\n",
 112         .procspeech = PROCSPEECH,
 113         .clear = SYNTH_CLEAR,
 114         .delay = 500,
 115         .trigger = 50,
 116         .jiffies = 50,
 117         .full = 1000,
 118         .startup = SYNTH_START,
 119         .checkval = SYNTH_CHECK,
 120         .vars = vars,
 121         .probe = synth_probe,
 122         .release = accent_release,
 123         .synth_immediate = synth_immediate,
 124         .catch_up = do_catch_up,
 125         .flush = synth_flush,
 126         .is_alive = spk_synth_is_alive_nop,
 127         .synth_adjust = NULL,
 128         .read_buff_add = NULL,
 129         .get_index = NULL,
 130         .indexing = {
 131                 .command = NULL,
 132                 .lowindex = 0,
 133                 .highindex = 0,
 134                 .currindex = 0,
 135         },
 136         .attributes = {
 137                 .attrs = synth_attrs,
 138                 .name = "acntpc",
 139         },
 140 };
 141
 142 static inline bool synth_writable(void)
 143 {
 144         return inb_p(synth_port_control) & SYNTH_WRITABLE;
 145 }
 146
 147 static inline bool synth_full(void)
 148 {
 149         return inb_p(speakup_info.port_tts + UART_RX) == 'F';
 150 }
 151
 152 static const char *synth_immediate(struct spk_synth *synth, const char *buf)
 153 {
 154         u_char ch;
 155
 156         while ((ch = *buf)) {
 157                 int timeout = SPK_XMITR_TIMEOUT;
 158
 159                 if (ch == '\n')
 160                         ch = PROCSPEECH;
 161                 if (synth_full())
 162                         return buf;
 163                 while (synth_writable()) {
 164                         if (!--timeout)
 165                                 return buf;
 166                         udelay(1);
 167                 }
 168                 outb_p(ch, speakup_info.port_tts);
 169                 buf++;
 170         }
 171         return NULL;
 172 }
 173
 174 static void do_catch_up(struct spk_synth *synth)
 175 {
 176         u_char ch;
 177         unsigned long flags;
 178         unsigned long jiff_max;
 179         int timeout;
 180         int delay_time_val;
 181         int jiffy_delta_val;
 182         int full_time_val;
 183         struct var_t *delay_time;
 184         struct var_t *full_time;
 185         struct var_t *jiffy_delta;
 186
 187         jiffy_delta = spk_get_var(JIFFY);
 188         delay_time = spk_get_var(DELAY);
 189         full_time = spk_get_var(FULL);
 190
 191         spin_lock_irqsave(&speakup_info.spinlock, flags);
 192         jiffy_delta_val = jiffy_delta->u.n.value;
 193         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 194
 195         jiff_max = jiffies + jiffy_delta_val;
 196         while (!kthread_should_stop()) {
 197                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 198                 if (speakup_info.flushing) {
 199                         speakup_info.flushing = 0;
 200                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 201                         synth->flush(synth);
 202                         continue;
 203                 }
 204                 if (synth_buffer_empty()) {
 205                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 206                         break;
 207                 }
 208                 set_current_state(TASK_INTERRUPTIBLE);
 209                 full_time_val = full_time->u.n.value;
 210                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 211                 if (synth_full()) {
 212                         schedule_timeout(msecs_to_jiffies(full_time_val));
 213                         continue;
 214                 }
 215                 set_current_state(TASK_RUNNING);
 216                 timeout = SPK_XMITR_TIMEOUT;
 217                 while (synth_writable()) {
 218                         if (!--timeout)
 219                                 break;
 220                         udelay(1);
 221                 }
 222                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 223                 ch = synth_buffer_getc();
 224                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 225                 if (ch == '\n')
 226                         ch = PROCSPEECH;
 227                 outb_p(ch, speakup_info.port_tts);
 228                 if (time_after_eq(jiffies, jiff_max) && ch == SPACE) {
 229                         timeout = SPK_XMITR_TIMEOUT;
 230                         while (synth_writable()) {
 231                                 if (!--timeout)
 232                                         break;
 233                                 udelay(1);
 234                         }
 235                         outb_p(PROCSPEECH, speakup_info.port_tts);
 236                         spin_lock_irqsave(&speakup_info.spinlock, flags);
 237                         jiffy_delta_val = jiffy_delta->u.n.value;
 238                         delay_time_val = delay_time->u.n.value;
 239                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 240                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 241                         jiff_max = jiffies+jiffy_delta_val;
 242                 }
 243         }
 244         timeout = SPK_XMITR_TIMEOUT;
 245         while (synth_writable()) {
 246                 if (!--timeout)
 247                         break;
 248                 udelay(1);
 249         }
 250         outb_p(PROCSPEECH, speakup_info.port_tts);
 251 }
 252
 253 static void synth_flush(struct spk_synth *synth)
 254 {
 255         outb_p(SYNTH_CLEAR, speakup_info.port_tts);
 256 }
 257
 258 static int synth_probe(struct spk_synth *synth)
 259 {
 260         unsigned int port_val = 0;
 261         int i = 0;
 262
 263         pr_info("Probing for %s.\n", synth->long_name);
 264         if (port_forced) {
 265                 speakup_info.port_tts = port_forced;
 266                 pr_info("probe forced to %x by kernel command line\n",
 267                                 speakup_info.port_tts);
 268                 if (synth_request_region(speakup_info.port_tts-1,
 269                                         SYNTH_IO_EXTENT)) {
 270                         pr_warn("sorry, port already reserved\n");
 271                         return -EBUSY;
 272                 }
 273                 port_val = inw(speakup_info.port_tts-1);
 274                 synth_port_control = speakup_info.port_tts-1;
 275         } else {
 276                 for (i = 0; synth_portlist[i]; i++) {
 277                         if (synth_request_region(synth_portlist[i],
 278                                                 SYNTH_IO_EXTENT)) {
 279                                 pr_warn
 280                                     ("request_region: failed with 0x%x, %d\n",
 281                                      synth_portlist[i], SYNTH_IO_EXTENT);
 282                                 continue;
 283                         }
 284                         port_val = inw(synth_portlist[i]) & 0xfffc;
 285                         if (port_val == 0x53fc) {
 286                                 /* 'S' and out&input bits */
 287                                 synth_port_control = synth_portlist[i];
 288                                 speakup_info.port_tts = synth_port_control+1;
 289                                 break;
 290                         }
 291                 }
 292         }
 293         port_val &= 0xfffc;
 294         if (port_val != 0x53fc) {
 295                 /* 'S' and out&input bits */
 296                 pr_info("%s: not found\n", synth->long_name);
 297                 synth_release_region(synth_port_control, SYNTH_IO_EXTENT);
 298                 synth_port_control = 0;
 299                 return -ENODEV;
 300         }
 301         pr_info("%s: %03x-%03x, driver version %s,\n", synth->long_name,
 302                 synth_port_control, synth_port_control+SYNTH_IO_EXTENT-1,
 303                 synth->version);
 304         synth->alive = 1;
 305         return 0;
 306 }
 307
 308 static void accent_release(void)
 309 {
 310         if (speakup_info.port_tts)
 311                 synth_release_region(speakup_info.port_tts-1, SYNTH_IO_EXTENT);
 312         speakup_info.port_tts = 0;
 313 }
 314
 315 module_param_named(port, port_forced, int, S_IRUGO);
 316 module_param_named(start, synth_acntpc.startup, short, S_IRUGO);
 317
 318 MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
 319 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 320
 321 module_spk_synth(synth_acntpc);
 322
 323 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 324 MODULE_AUTHOR("David Borowski");
 325 MODULE_DESCRIPTION("Speakup support for Accent PC synthesizer");
 326 MODULE_LICENSE("GPL");
 327 MODULE_VERSION(DRV_VERSION);
 328