ewskbd.c revision 1.4
1 /* $NetBSD: ewskbd.c,v 1.4 2007/03/04 05:59:47 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Izumi Tsutsui 5 * Copyright (c) 2004 Steve Rumble 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * EWS4800 serial keyboard driver attached to zs channel 0 at 4800 bps. 33 * This layer is the parent of wskbd. 34 * 35 * This driver is taken from sgimips. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: ewskbd.c,v 1.4 2007/03/04 05:59:47 christos Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/malloc.h> 43 #include <sys/systm.h> 44 #include <sys/conf.h> 45 #include <sys/device.h> 46 47 #include <dev/wscons/wsconsio.h> 48 #include <dev/wscons/wskbdvar.h> 49 #include <dev/wscons/wsksymdef.h> 50 #include <dev/wscons/wsksymvar.h> 51 52 #include <dev/ic/z8530reg.h> 53 #include <machine/z8530var.h> 54 55 #include <ews4800mips/dev/ews4800keymap.h> 56 57 #define EWSKBD_BAUD 4800 58 59 #define EWSKBD_TXQ_LEN 16 /* power of 2 */ 60 #define EWSKBD_TXQ_LEN_MASK (EWSKBD_TXQ_LEN - 1) 61 #define EWSKBD_NEXTTXQ(x) (((x) + 1) & EWSKBD_TXQ_LEN_MASK) 62 63 #define EWSKBD_RXQ_LEN 64 /* power of 2 */ 64 #define EWSKBD_RXQ_LEN_MASK (EWSKBD_RXQ_LEN - 1) 65 #define EWSKBD_NEXTRXQ(x) (((x) + 1) & EWSKBD_RXQ_LEN_MASK) 66 67 #define EWSKBD_KEY_UP 0x80 68 #define EWSKBD_KEY_MASK 0x7f 69 70 #ifdef EWSKBD_DEBUG 71 int ewskbd_debug = 0; 72 #define DPRINTF(_x) if (ewskbd_debug) printf _x 73 #else 74 #define DPRINTF(_x) 75 #endif 76 77 struct ewskbd_softc { 78 struct device sc_dev; 79 struct ewskbd_devconfig *sc_dc; 80 }; 81 82 struct ewskbd_devconfig { 83 /* transmit tail-chasing fifo */ 84 uint8_t txq[EWSKBD_TXQ_LEN]; 85 u_int txq_head; 86 u_int txq_tail; 87 88 /* receive tail-chasing fifo */ 89 uint8_t rxq[EWSKBD_RXQ_LEN]; 90 u_int rxq_head; 91 u_int rxq_tail; 92 93 /* state */ 94 u_int state; 95 #define TX_READY 0x01 96 97 /* LED status */ 98 uint8_t leds; 99 #define EWSKBD_SETLEDS 0x90 100 #define EWSKBD_CAPSLOCK 0x02 101 #define EWSKBD_KANA 0x04 102 103 /* wscons glue */ 104 struct device *wskbddev; 105 int enabled; 106 }; 107 108 static int ewskbd_zsc_match(struct device *, struct cfdata *, void *); 109 static void ewskbd_zsc_attach(struct device *, struct device *, void *); 110 static int ewskbd_zsc_init(struct zs_chanstate *); 111 static void ewskbd_zsc_rxint(struct zs_chanstate *); 112 static void ewskbd_zsc_stint(struct zs_chanstate *, int); 113 static void ewskbd_zsc_txint(struct zs_chanstate *); 114 static void ewskbd_zsc_softint(struct zs_chanstate *); 115 static void ewskbd_zsc_send(struct zs_chanstate *, uint8_t *, u_int); 116 117 static void ewskbd_wskbd_input(struct zs_chanstate *, u_char); 118 static int ewskbd_wskbd_enable(void *, int); 119 static void ewskbd_wskbd_set_leds(void *, int); 120 static int ewskbd_wskbd_get_leds(void *); 121 static int ewskbd_wskbd_ioctl(void *, u_long, void *, int, struct lwp *); 122 123 void ewskbd_zsc_cnattach(uint32_t, uint32_t, int); 124 static void ewskbd_zsc_wskbd_getc(void *, u_int *, int *); 125 static void ewskbd_wskbd_pollc(void *, int); 126 static void ewskbd_wskbd_bell(void *, u_int, u_int, u_int); 127 128 CFATTACH_DECL(ewskbd_zsc, sizeof(struct ewskbd_softc), 129 ewskbd_zsc_match, ewskbd_zsc_attach, NULL, NULL); 130 131 static struct zsops ewskbd_zsops = { 132 ewskbd_zsc_rxint, 133 ewskbd_zsc_stint, 134 ewskbd_zsc_txint, 135 ewskbd_zsc_softint 136 }; 137 138 const struct wskbd_mapdata ews4800kbd_wskbd_keymapdata = { 139 ews4800kbd_keydesctab, 140 KB_JP 141 }; 142 143 const struct wskbd_accessops ewskbd_wskbd_accessops = { 144 ewskbd_wskbd_enable, 145 ewskbd_wskbd_set_leds, 146 ewskbd_wskbd_ioctl 147 }; 148 149 const struct wskbd_consops ewskbd_wskbd_consops = { 150 ewskbd_zsc_wskbd_getc, 151 ewskbd_wskbd_pollc, 152 ewskbd_wskbd_bell 153 }; 154 155 static struct ewskbd_devconfig ewskbd_console_dc; 156 static struct zs_chanstate conschan; 157 static int ewskbd_is_console; 158 159 static int 160 ewskbd_zsc_match(struct device *parent, struct cfdata *cf, void *aux) 161 { 162 struct zsc_attach_args *zsc_args = aux; 163 struct zsc_softc *zsc = (void *)parent; 164 165 /* keyboard is on channel B */ 166 if ((zsc->zsc_flags & 0x0001 /* kbms port */) != 0 && 167 zsc_args->channel == 1) 168 /* prior to generic zstty(4) */ 169 return 3; 170 171 return 0; 172 } 173 174 static void 175 ewskbd_zsc_attach(struct device *parent, struct device *self, void *aux) 176 { 177 struct ewskbd_softc *sc; 178 struct zs_chanstate *cs; 179 struct zsc_softc *zsc; 180 struct zsc_attach_args *zsc_args; 181 struct wskbddev_attach_args wskaa; 182 int channel; 183 184 zsc = (void *)parent; 185 sc = (void *)self; 186 zsc_args = aux; 187 188 /* Establish ourself with the MD z8530 driver */ 189 channel = zsc_args->channel; 190 cs = zsc->zsc_cs[channel]; 191 192 if (ewskbd_is_console) { 193 sc->sc_dc = &ewskbd_console_dc; 194 wskaa.console = 1; 195 sc->sc_dc->enabled = 1; 196 } else { 197 wskaa.console = 0; 198 199 sc->sc_dc = malloc(sizeof(struct ewskbd_devconfig), M_DEVBUF, 200 M_WAITOK | M_ZERO); 201 if (sc->sc_dc == NULL) { 202 printf(": can't allocate memory\n"); 203 return; 204 } 205 sc->sc_dc->enabled = 0; 206 } 207 cs->cs_defspeed = EWSKBD_BAUD; 208 cs->cs_ops = &ewskbd_zsops; 209 cs->cs_private = sc; 210 211 sc->sc_dc->txq_head = 0; 212 sc->sc_dc->txq_tail = 0; 213 sc->sc_dc->rxq_head = 0; 214 sc->sc_dc->rxq_tail = 0; 215 sc->sc_dc->state = TX_READY; 216 sc->sc_dc->leds = 0; 217 218 ewskbd_zsc_init(cs); 219 220 /* set default LED */ 221 ewskbd_wskbd_set_leds(cs, 0); 222 223 printf(": baud rate %d\n", EWSKBD_BAUD); 224 225 /* attach wskbd */ 226 wskaa.keymap = &ews4800kbd_wskbd_keymapdata; 227 wskaa.accessops = &ewskbd_wskbd_accessops; 228 wskaa.accesscookie = cs; 229 sc->sc_dc->wskbddev = config_found(self, &wskaa, wskbddevprint); 230 } 231 232 static int 233 ewskbd_zsc_init(struct zs_chanstate *cs) 234 { 235 int s; 236 237 s = splzs(); 238 239 zs_write_reg(cs, 9, ZSWR9_B_RESET); 240 DELAY(100); 241 zs_write_reg(cs, 9, ZSWR9_MASTER_IE | ZSWR9_NO_VECTOR); 242 243 cs->cs_preg[1] = ZSWR1_RIE | ZSWR1_TIE; 244 cs->cs_preg[2] = 0; 245 cs->cs_preg[3] = ZSWR3_RX_8 | ZSWR3_RX_ENABLE; 246 cs->cs_preg[4] = ZSWR4_CLK_X16 | ZSWR4_ONESB | ZSWR4_PARENB; 247 cs->cs_preg[5] = ZSWR5_TX_8 | ZSWR5_RTS | ZSWR5_TX_ENABLE; 248 cs->cs_preg[6] = 0; 249 cs->cs_preg[7] = 0; 250 cs->cs_preg[8] = 0; 251 cs->cs_preg[9] = ZSWR9_MASTER_IE | ZSWR9_NO_VECTOR; 252 cs->cs_preg[10] = 0; 253 cs->cs_preg[11] = ZSWR11_RXCLK_BAUD | ZSWR11_TXCLK_BAUD | 254 ZSWR11_TRXC_OUT_ENA | ZSWR11_TRXC_BAUD; 255 /* reg[11] and reg[12] are set by zs_set_speed() with cs_brg_clk */ 256 zs_set_speed(cs, EWSKBD_BAUD); 257 cs->cs_preg[14] = ZSWR14_BAUD_FROM_PCLK | ZSWR14_BAUD_ENA; 258 cs->cs_preg[15] = 0; 259 260 zs_loadchannelregs(cs); 261 262 splx(s); 263 264 return 0; 265 } 266 267 static void 268 ewskbd_zsc_rxint(struct zs_chanstate *cs) 269 { 270 struct ewskbd_softc *sc; 271 struct ewskbd_devconfig *dc; 272 uint8_t c, r; 273 274 sc = cs->cs_private; 275 dc = sc->sc_dc; 276 277 /* clear errors */ 278 r = zs_read_reg(cs, 1); 279 if (r & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) 280 zs_write_csr(cs, ZSWR0_RESET_ERRORS); 281 282 /* read byte and append to our queue */ 283 c = zs_read_data(cs); 284 285 dc->rxq[dc->rxq_tail] = c; 286 dc->rxq_tail = EWSKBD_NEXTRXQ(dc->rxq_tail); 287 288 cs->cs_softreq = 1; 289 } 290 291 static void 292 ewskbd_zsc_stint(struct zs_chanstate *cs, int force) 293 { 294 295 zs_write_csr(cs, ZSWR0_RESET_STATUS); 296 cs->cs_softreq = 1; 297 } 298 299 static void 300 ewskbd_zsc_txint(struct zs_chanstate *cs) 301 { 302 struct ewskbd_softc *sc; 303 304 sc = cs->cs_private; 305 zs_write_reg(cs, 0, ZSWR0_RESET_TXINT); 306 sc->sc_dc->state |= TX_READY; 307 cs->cs_softreq = 1; 308 } 309 310 static void 311 ewskbd_zsc_softint(struct zs_chanstate *cs) 312 { 313 struct ewskbd_softc *sc; 314 struct ewskbd_devconfig *dc; 315 316 sc = cs->cs_private; 317 dc = sc->sc_dc; 318 319 /* handle pending transmissions */ 320 if (dc->txq_head != dc->txq_tail && (dc->state & TX_READY)) { 321 int s; 322 323 dc->state &= ~TX_READY; 324 325 s = splzs(); 326 zs_write_data(cs, dc->txq[dc->txq_head]); 327 splx(s); 328 329 dc->txq_head = EWSKBD_NEXTTXQ(dc->txq_head); 330 } 331 332 /* don't bother if nobody is listening */ 333 if (!dc->enabled) { 334 dc->rxq_head = dc->rxq_tail; 335 return; 336 } 337 338 /* handle incoming keystrokes/config */ 339 while (dc->rxq_head != dc->rxq_tail) { 340 uint8_t key = dc->rxq[dc->rxq_head]; 341 342 /* toss wskbd a bone */ 343 ewskbd_wskbd_input(cs, key); 344 345 dc->rxq_head = EWSKBD_NEXTRXQ(dc->rxq_head); 346 } 347 } 348 349 /* expects to be in splzs() */ 350 static void 351 ewskbd_zsc_send(struct zs_chanstate *cs, uint8_t *c, u_int len) 352 { 353 struct ewskbd_softc *sc; 354 struct ewskbd_devconfig *dc; 355 int i; 356 357 sc = cs->cs_private; 358 dc = sc->sc_dc; 359 360 for (i = 0; i < len; i++) { 361 if (dc->state & TX_READY) { 362 zs_write_data(cs, c[i]); 363 dc->state &= ~TX_READY; 364 } else { 365 dc->txq[dc->txq_tail] = c[i]; 366 dc->txq_tail = EWSKBD_NEXTTXQ(dc->txq_tail); 367 cs->cs_softreq = 1; 368 } 369 } 370 } 371 372 /****************************************************************************** 373 * wskbd glue 374 ******************************************************************************/ 375 376 static void 377 ewskbd_wskbd_input(struct zs_chanstate *cs, uint8_t key) 378 { 379 struct ewskbd_softc *sc; 380 u_int type; 381 382 sc = cs->cs_private; 383 384 if (key & EWSKBD_KEY_UP) 385 type = WSCONS_EVENT_KEY_UP; 386 else 387 type = WSCONS_EVENT_KEY_DOWN; 388 389 wskbd_input(sc->sc_dc->wskbddev, type, (key & EWSKBD_KEY_MASK)); 390 391 DPRINTF(("ewskbd_wskbd_input: inputted key 0x%x\n", key)); 392 393 #ifdef WSDISPLAY_COMPAT_RAWKBD 394 wskbd_rawinput(sc->sc_dc->wskbddev, &key, 1); 395 #endif 396 } 397 398 static int 399 ewskbd_wskbd_enable(void *cookie, int on) 400 { 401 struct zs_chanstate *cs; 402 struct ewskbd_softc *sc; 403 404 cs = cookie; 405 sc = cs->cs_private; 406 407 if (on) { 408 if (sc->sc_dc->enabled) 409 return EBUSY; 410 else 411 sc->sc_dc->enabled = 1; 412 } else 413 sc->sc_dc->enabled = 0; 414 415 DPRINTF(("ewskbd_wskbd_enable: %s\n", on ? "enabled" : "disabled")); 416 417 return 0; 418 } 419 420 static void 421 ewskbd_wskbd_set_leds(void *cookie, int leds) 422 { 423 struct zs_chanstate *cs; 424 struct ewskbd_softc *sc; 425 int s; 426 uint8_t cmd; 427 428 cs = cookie; 429 sc = cs->cs_private; 430 cmd = 0; 431 432 if (leds & WSKBD_LED_CAPS) 433 cmd |= EWSKBD_CAPSLOCK; 434 435 sc->sc_dc->leds = cmd; 436 437 cmd |= EWSKBD_SETLEDS; 438 439 s = splzs(); 440 ewskbd_zsc_send(cs, &cmd, 1); 441 splx(s); 442 } 443 444 static int 445 ewskbd_wskbd_get_leds(void *cookie) 446 { 447 struct zs_chanstate *cs; 448 struct ewskbd_softc *sc; 449 int leds; 450 451 cs = cookie; 452 sc = cs->cs_private; 453 leds = 0; 454 455 if (sc->sc_dc->leds & EWSKBD_CAPSLOCK) 456 leds |= WSKBD_LED_CAPS; 457 458 return leds; 459 } 460 461 static int 462 ewskbd_wskbd_ioctl(void *cookie, u_long cmd, void *data, int flag, 463 struct lwp *l) 464 { 465 466 switch (cmd) { 467 case WSKBDIO_GTYPE: 468 *(int *)data = WSKBD_TYPE_EWS4800; 469 break; 470 471 #ifdef notyet 472 case WSKBDIO_BELL: 473 case WSKBDIO_COMPLEXBELL: 474 case WSKBDIO_SETBELL: 475 case WSKBDIO_GETBELL: 476 case WSKBDIO_SETDEFAULTBELL: 477 case WSKBDIO_GETDEFAULTBELL: 478 case WSKBDIO_SETKEYREPEAT: 479 case WSKBDIO_GETKEYREPEAT: 480 case WSKBDIO_SETDEFAULTKEYREPEAT: 481 case WSKBDIO_GETDEFAULTKEYREPEAT: 482 #endif 483 484 case WSKBDIO_SETLEDS: 485 ewskbd_wskbd_set_leds(cookie, *(int *)data); 486 break; 487 488 case WSKBDIO_GETLEDS: 489 *(int *)data = ewskbd_wskbd_get_leds(cookie); 490 break; 491 492 #ifdef notyet 493 case WSKBDIO_GETMAP: 494 case WSKBDIO_SETMAP: 495 case WSKBDIO_GETENCODING: 496 case WSKBDIO_SETENCODING: 497 case WSKBDIO_SETMODE: 498 case WSKBDIO_GETMODE: 499 case WSKBDIO_SETKEYCLICK: 500 case WSKBDIO_GETKEYCLICK: 501 #endif 502 503 default: 504 return EPASSTHROUGH; 505 } 506 507 return 0; 508 } 509 510 /* 511 * console routines 512 */ 513 void 514 ewskbd_zsc_cnattach(uint32_t csr, uint32_t data, int pclk) 515 { 516 struct zs_chanstate *cs; 517 518 cs = &conschan; 519 520 cs->cs_reg_csr = (void *)csr; 521 cs->cs_reg_data = (void *)data; 522 cs->cs_brg_clk = pclk / 16; 523 cs->cs_defspeed = EWSKBD_BAUD; 524 525 ewskbd_zsc_init(cs); 526 527 zs_putc(cs, EWSKBD_SETLEDS); 528 529 wskbd_cnattach(&ewskbd_wskbd_consops, cs, &ews4800kbd_wskbd_keymapdata); 530 ewskbd_is_console = 1; 531 } 532 533 static void 534 ewskbd_zsc_wskbd_getc(void *cookie, u_int *type, int *data) 535 { 536 int key; 537 538 key = zs_getc(cookie); 539 540 if (key & EWSKBD_KEY_UP) 541 *type = WSCONS_EVENT_KEY_UP; 542 else 543 *type = WSCONS_EVENT_KEY_DOWN; 544 545 *data = key & EWSKBD_KEY_MASK; 546 } 547 548 static void 549 ewskbd_wskbd_pollc(void *cookie, int on) 550 { 551 552 static bool __polling = false; 553 static int s; 554 555 if (on && !__polling) { 556 /* disable interrupt driven I/O */ 557 s = splhigh(); 558 } else if (!on && __polling) { 559 /* enable interrupt driven I/O */ 560 __polling = false; 561 splx(s); 562 } 563 } 564 565 static void 566 ewskbd_wskbd_bell(void *cookie, u_int pitch, u_int period, u_int volume) 567 { 568 569 /* nothing */ 570 } 571
Indexes created Tue Sep 30 20:09:53 GMT 2025