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); 319 320