drivers/staging/speakup/speakup_keypc.c

   1 /*
   2  * written by David Borowski
   3  *
   4  * Copyright (C) 2003 David Borowski.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * specificly written as a driver for the speakup screenreview
  17  * package it's not a general device driver.
  18  * This driver is for the Keynote Gold internal synthesizer.
  19  */
  20 #include <linux/jiffies.h>
  21 #include <linux/sched.h>
  22 #include <linux/timer.h>
  23 #include <linux/kthread.h>
  24 #include <linux/serial_reg.h>
  25
  26 #include "spk_priv.h"
  27 #include "speakup.h"
  28
  29 #define DRV_VERSION "2.10"
  30 #define SYNTH_IO_EXTENT 0x04
  31 #define SWAIT udelay(70)
  32 #define PROCSPEECH 0x1f
  33 #define SYNTH_CLEAR 0x03
  34
  35 static int synth_probe(struct spk_synth *synth);
  36 static void keynote_release(void);
  37 static const char *synth_immediate(struct spk_synth *synth, const char *buf);
  38 static void do_catch_up(struct spk_synth *synth);
  39 static void synth_flush(struct spk_synth *synth);
  40
  41 static int synth_port;
  42 static int port_forced;
  43 static unsigned int synth_portlist[] = { 0x2a8, 0 };
  44
  45 static struct var_t vars[] = {
  46         { CAPS_START, .u.s = {"[f130]" } },
  47         { CAPS_STOP, .u.s = {"[f90]" } },
  48         { RATE, .u.n = {"\04%c ", 8, 0, 10, 81, -8, NULL } },
  49         { PITCH, .u.n = {"[f%d]", 5, 0, 9, 40, 10, NULL } },
  50         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  51         V_LAST_VAR
  52 };
  53
  54 /*
  55  * These attributes will appear in /sys/accessibility/speakup/keypc.
  56  */
  57 static struct kobj_attribute caps_start_attribute =
  58         __ATTR(caps_start, 0644, spk_var_show, spk_var_store);
  59 static struct kobj_attribute caps_stop_attribute =
  60         __ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
  61 static struct kobj_attribute pitch_attribute =
  62         __ATTR(pitch, 0644, spk_var_show, spk_var_store);
  63 static struct kobj_attribute rate_attribute =
  64         __ATTR(rate, 0644, spk_var_show, spk_var_store);
  65
  66 static struct kobj_attribute delay_time_attribute =
  67         __ATTR(delay_time, 0644, spk_var_show, spk_var_store);
  68 static struct kobj_attribute direct_attribute =
  69         __ATTR(direct, 0644, spk_var_show, spk_var_store);
  70 static struct kobj_attribute full_time_attribute =
  71         __ATTR(full_time, 0644, spk_var_show, spk_var_store);
  72 static struct kobj_attribute jiffy_delta_attribute =
  73         __ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
  74 static struct kobj_attribute trigger_time_attribute =
  75         __ATTR(trigger_time, 0644, spk_var_show, spk_var_store);
  76
  77 /*
  78  * Create a group of attributes so that we can create and destroy them all
  79  * at once.
  80  */
  81 static struct attribute *synth_attrs[] = {
  82         &caps_start_attribute.attr,
  83         &caps_stop_attribute.attr,
  84         &pitch_attribute.attr,
  85         &rate_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_keypc = {
  95         .name = "keypc",
  96         .version = DRV_VERSION,
  97         .long_name = "Keynote PC",
  98         .init = "[t][n7,1][n8,0]",
  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         .probe = synth_probe,
 109         .release = keynote_release,
 110         .synth_immediate = synth_immediate,
 111         .catch_up = do_catch_up,
 112         .flush = synth_flush,
 113         .is_alive = spk_synth_is_alive_nop,
 114         .synth_adjust = NULL,
 115         .read_buff_add = NULL,
 116         .get_index = NULL,
 117         .indexing = {
 118                 .command = NULL,
 119                 .lowindex = 0,
 120                 .highindex = 0,
 121                 .currindex = 0,
 122         },
 123         .attributes = {
 124                 .attrs = synth_attrs,
 125                 .name = "keypc",
 126         },
 127 };
 128
 129 static inline bool synth_writable(void)
 130 {
 131         return (inb_p(synth_port + UART_RX) & 0x10) != 0;
 132 }
 133
 134 static inline bool synth_full(void)
 135 {
 136         return (inb_p(synth_port + UART_RX) & 0x80) == 0;
 137 }
 138
 139 static char *oops(void)
 140 {
 141         int s1, s2, s3, s4;
 142
 143         s1 = inb_p(synth_port);
 144         s2 = inb_p(synth_port+1);
 145         s3 = inb_p(synth_port+2);
 146         s4 = inb_p(synth_port+3);
 147         pr_warn("synth timeout %d %d %d %d\n", s1, s2, s3, s4);
 148         return NULL;
 149 }
 150
 151 static const char *synth_immediate(struct spk_synth *synth, const char *buf)
 152 {
 153         u_char ch;
 154         int timeout;
 155
 156         while ((ch = *buf)) {
 157                 if (ch == '\n')
 158                         ch = PROCSPEECH;
 159                 if (synth_full())
 160                         return buf;
 161                 timeout = 1000;
 162                 while (synth_writable())
 163                         if (--timeout <= 0)
 164                                 return oops();
 165                 outb_p(ch, synth_port);
 166                 udelay(70);
 167                 buf++;
 168         }
 169         return NULL;
 170 }
 171
 172 static void do_catch_up(struct spk_synth *synth)
 173 {
 174         u_char ch;
 175         int timeout;
 176         unsigned long flags;
 177         unsigned long jiff_max;
 178         struct var_t *jiffy_delta;
 179         struct var_t *delay_time;
 180         struct var_t *full_time;
 181         int delay_time_val;
 182         int full_time_val;
 183         int jiffy_delta_val;
 184
 185         jiffy_delta = spk_get_var(JIFFY);
 186         delay_time = spk_get_var(DELAY);
 187         full_time = spk_get_var(FULL);
 188 spin_lock_irqsave(&speakup_info.spinlock, flags);
 189         jiffy_delta_val = jiffy_delta->u.n.value;
 190         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 191
 192         jiff_max = jiffies + jiffy_delta_val;
 193         while (!kthread_should_stop()) {
 194                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 195                 if (speakup_info.flushing) {
 196                         speakup_info.flushing = 0;
 197                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 198                         synth->flush(synth);
 199                         continue;
 200                 }
 201                 if (synth_buffer_empty()) {
 202                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 203                         break;
 204                 }
 205                 set_current_state(TASK_INTERRUPTIBLE);
 206                 full_time_val = full_time->u.n.value;
 207                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 208                 if (synth_full()) {
 209                         schedule_timeout(msecs_to_jiffies(full_time_val));
 210                         continue;
 211                 }
 212                 set_current_state(TASK_RUNNING);
 213                 timeout = 1000;
 214                 while (synth_writable())
 215                         if (--timeout <= 0)
 216                                 break;
 217                 if (timeout <= 0) {
 218                         oops();
 219                         break;
 220                 }
 221                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 222                 ch = synth_buffer_getc();
 223                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 224                 if (ch == '\n')
 225                         ch = PROCSPEECH;
 226                 outb_p(ch, synth_port);
 227                 SWAIT;
 228                 if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
 229                         timeout = 1000;
 230                         while (synth_writable())
 231                                 if (--timeout <= 0)
 232                                         break;
 233                         if (timeout <= 0) {
 234                                 oops();
 235                                 break;
 236                         }
 237                         outb_p(PROCSPEECH, synth_port);
 238                         spin_lock_irqsave(&speakup_info.spinlock, flags);
 239                         jiffy_delta_val = jiffy_delta->u.n.value;
 240                         delay_time_val = delay_time->u.n.value;
 241                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 242                         schedule_timeout(msecs_to_jiffies(delay_time_val));
 243                         jiff_max = jiffies+jiffy_delta_val;
 244                 }
 245         }
 246         timeout = 1000;
 247         while (synth_writable())
 248                 if (--timeout <= 0)
 249                         break;
 250         if (timeout <= 0)
 251                 oops();
 252         else
 253                 outb_p(PROCSPEECH, synth_port);
 254 }
 255
 256 static void synth_flush(struct spk_synth *synth)
 257 {
 258         outb_p(SYNTH_CLEAR, synth_port);
 259 }
 260
 261 static int synth_probe(struct spk_synth *synth)
 262 {
 263         unsigned int port_val = 0;
 264         int i = 0;
 265
 266         pr_info("Probing for %s.\n", synth->long_name);
 267         if (port_forced) {
 268                 synth_port = port_forced;
 269                 pr_info("probe forced to %x by kernel command line\n",
 270                                 synth_port);
 271                 if (synth_request_region(synth_port-1, SYNTH_IO_EXTENT)) {
 272                         pr_warn("sorry, port already reserved\n");
 273                         return -EBUSY;
 274                 }
 275                 port_val = inb(synth_port);
 276         } else {
 277                 for (i = 0; synth_portlist[i]; i++) {
 278                         if (synth_request_region(synth_portlist[i],
 279                                                 SYNTH_IO_EXTENT)) {
 280                                 pr_warn
 281                                     ("request_region: failed with 0x%x, %d\n",
 282                                      synth_portlist[i], SYNTH_IO_EXTENT);
 283                                 continue;
 284                         }
 285                         port_val = inb(synth_portlist[i]);
 286                         if (port_val == 0x80) {
 287                                 synth_port = synth_portlist[i];
 288                                 break;
 289                         }
 290                 }
 291         }
 292         if (port_val != 0x80) {
 293                 pr_info("%s: not found\n", synth->long_name);
 294                 synth_release_region(synth_port, SYNTH_IO_EXTENT);
 295                 synth_port = 0;
 296                 return -ENODEV;
 297         }
 298         pr_info("%s: %03x-%03x, driver version %s,\n", synth->long_name,
 299                 synth_port, synth_port+SYNTH_IO_EXTENT-1,
 300                 synth->version);
 301         synth->alive = 1;
 302         return 0;
 303 }
 304
 305 static void keynote_release(void)
 306 {
 307         if (synth_port)
 308                 synth_release_region(synth_port, SYNTH_IO_EXTENT);
 309         synth_port = 0;
 310 }
 311
 312 module_param_named(port, port_forced, int, 0444);
 313 module_param_named(start, synth_keypc.startup, short, 0444);
 314
 315 MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
 316 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 317
 318 module_spk_synth(synth_keypc);
 319
 320 MODULE_AUTHOR("David Borowski");
 321 MODULE_DESCRIPTION("Speakup support for Keynote Gold PC synthesizers");
 322 MODULE_LICENSE("GPL");
 323 MODULE_VERSION(DRV_VERSION);
 324