psh3tp.c revision 1.2
1 /* $NetBSD: psh3tp.c,v 1.2 2005/05/31 23:22:14 uwe Exp $ */ 2 /* 3 * Copyright (c) 2005 KIYOHARA Takashi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/device.h> 34 #include <sys/malloc.h> 35 #include <sys/systm.h> 36 #include <sys/callout.h> 37 38 #include "opt_psh3tp.h" 39 40 #include <dev/wscons/wsconsio.h> 41 #include <dev/wscons/wsmousevar.h> 42 #include <dev/hpc/hpctpanelvar.h> 43 44 #include <machine/platid.h> 45 #include <machine/platid_mask.h> 46 47 #include <machine/intr.h> 48 49 #include <sh3/exception.h> 50 #include <sh3/intcreg.h> 51 #include <sh3/pfcreg.h> 52 #include <sh3/adcreg.h> 53 54 #include <sh3/dev/adcvar.h> 55 56 57 #ifdef PSH3TP_DEBUG 58 volatile int psh3tp_debug = 4; 59 #define DPRINTF_PRINTF printf_nolog 60 #define DPRINTF(arg) if (psh3tp_debug) DPRINTF_PRINTF arg 61 #define DPRINTFN(n, arg) if (psh3tp_debug > (n)) DPRINTF_PRINTF arg 62 #else 63 #define DPRINTF(arg) ((void)0) 64 #define DPRINTFN(n, arg) ((void)0) 65 #endif 66 67 68 /* 69 * PFC bits pertinent to PERSONA HPW-50PA touch-panel 70 */ 71 #define PHDR_TP_PEN_UP 0x40 72 #define SCPDR_TP_SCAN_ENABLE 0x20 73 #define SCPDR_TP_SCAN_DISABLE 0x01 74 #define SCPDR_TP_SCAN_X 0x06 75 #define SCPDR_TP_SCAN_Y 0x09 76 77 /* 78 * A/D converter channels to get x/y from 79 */ 80 #define ADC_CHANNEL_TP_X 1 81 #define ADC_CHANNEL_TP_Y 0 82 83 /* 84 * Default (read: my device) raw X/Y values for framebuffer edges. 85 */ 86 #define PSH3TP_FB_RIGHT 56 87 #define PSH3TP_FB_LEFT 969 88 #define PSH3TP_FB_TOP 848 89 #define PSH3TP_FB_BOTTOM 121 90 91 92 struct psh3tp_softc { 93 struct device sc_dev; 94 95 #define PSH3TP_WSMOUSE_ENABLED 0x01 96 int sc_enabled; 97 struct callout sc_touch_ch; 98 struct device *sc_wsmousedev; 99 struct tpcalib_softc sc_tpcalib; /* calibration info for wsmouse */ 100 }; 101 102 103 /* config machinery */ 104 static int psh3tp_match(struct device *, struct cfdata *, void *); 105 static void psh3tp_attach(struct device *, struct device *, void *); 106 static int psh3tp_wsmouse_submatch(struct device *, struct cfdata *, void *); 107 108 /* wsmouse accessops */ 109 static int psh3tp_wsmouse_enable(void *); 110 static int psh3tp_wsmouse_ioctl(void *, u_long, caddr_t, int, struct proc *); 111 static void psh3tp_wsmouse_disable(void *); 112 113 /* internal driver routines */ 114 static void psh3tp_enable(struct psh3tp_softc *); 115 static void psh3tp_disable(struct psh3tp_softc *); 116 static int psh3tp_set_enable(struct psh3tp_softc *, int, int); 117 static int psh3tp_intr(void *); 118 static void psh3tp_start_polling(void *); 119 static void psh3tp_stop_polling(struct psh3tp_softc *); 120 static void psh3tp_callout_wsmouse(void *); 121 static void psh3tp_wsmouse_input(struct psh3tp_softc *, int, int); 122 static void psh3tp_get_raw_xy(int *, int *); 123 124 125 const struct wsmouse_accessops psh3tp_accessops = { 126 psh3tp_wsmouse_enable, 127 psh3tp_wsmouse_ioctl, 128 psh3tp_wsmouse_disable 129 }; 130 131 static const struct wsmouse_calibcoords psh3tp_default_calib = { 132 0, 0, 639, 239, 133 4, 134 {{ PSH3TP_FB_LEFT, PSH3TP_FB_TOP, 0, 0 }, 135 { PSH3TP_FB_RIGHT, PSH3TP_FB_TOP, 639, 0 }, 136 { PSH3TP_FB_LEFT, PSH3TP_FB_BOTTOM, 0, 239 }, 137 { PSH3TP_FB_RIGHT, PSH3TP_FB_BOTTOM, 639, 239 }} 138 }; 139 140 141 CFATTACH_DECL(psh3tp, sizeof(struct psh3tp_softc), 142 psh3tp_match, psh3tp_attach, NULL, NULL); 143 144 145 static int 146 psh3tp_match(struct device *parent, struct cfdata *cf, void *aux) 147 { 148 149 if (!platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 150 return (0); 151 152 if (strcmp(cf->cf_name, "psh3tp") != 0) 153 return (0); 154 155 return (1); 156 } 157 158 159 /* 160 * Attach the touch panel driver and its wsmouse child. 161 * 162 * Note that we have to use submatch to distinguish between child because 163 * wsmouse_match matches unconditionally. 164 */ 165 static void 166 psh3tp_attach(struct device *parent, struct device *self, void *aux) 167 { 168 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 169 struct wsmousedev_attach_args wsma; 170 171 printf("\n"); 172 173 sc->sc_enabled = 0; 174 175 /* touch-panel as a pointing device */ 176 wsma.accessops = &psh3tp_accessops; 177 wsma.accesscookie = sc; 178 179 sc->sc_wsmousedev = config_found_sm( 180 self, &wsma, wsmousedevprint, psh3tp_wsmouse_submatch); 181 if (sc->sc_wsmousedev == NULL) 182 return; 183 184 /* init calibration, set default parameters */ 185 tpcalib_init(&sc->sc_tpcalib); 186 tpcalib_ioctl(&sc->sc_tpcalib, WSMOUSEIO_SCALIBCOORDS, 187 (caddr_t)__UNCONST(&psh3tp_default_calib), 0, 0); 188 189 /* used when in polling mode */ 190 callout_init(&sc->sc_touch_ch); 191 192 /* establish interrupt handler, but disable until opened */ 193 intc_intr_establish(SH7709_INTEVT2_IRQ2, 194 IST_EDGE, IPL_TTY, psh3tp_intr, sc); 195 intc_intr_disable(SH7709_INTEVT2_IRQ2); 196 } 197 198 199 static int 200 psh3tp_wsmouse_submatch(struct device *parent, struct cfdata *cf, void *aux) 201 { 202 203 return (!strcmp(cf->cf_name, "wsmouse")); 204 } 205 206 207 /* 208 * Enable touch panel: we start in interrupt mode. 209 * Must be called at spltty(). 210 */ 211 static void 212 psh3tp_enable(struct psh3tp_softc *sc) 213 { 214 215 DPRINTFN(2, ("%s: enable\n", sc->sc_dev.dv_xname)); 216 intc_intr_enable(SH7709_INTEVT2_IRQ2); 217 } 218 219 220 /* 221 * Disable touch panel: disable interrupt, cancel pending callout. 222 * Must be called at spltty(). 223 */ 224 static void 225 psh3tp_disable(struct psh3tp_softc *sc) 226 { 227 228 DPRINTFN(2, ("%s: disable\n", sc->sc_dev.dv_xname)); 229 intc_intr_disable(SH7709_INTEVT2_IRQ2); 230 callout_stop(&sc->sc_touch_ch); 231 } 232 233 234 static int 235 psh3tp_set_enable(struct psh3tp_softc *sc, int on, int child) 236 { 237 int s = spltty(); 238 239 if (on) { 240 if (!sc->sc_enabled) 241 psh3tp_enable(sc); 242 sc->sc_enabled |= child; 243 } else { 244 sc->sc_enabled &= ~child; 245 if (!sc->sc_enabled) 246 psh3tp_disable(sc); 247 } 248 249 splx(s); 250 return (0); 251 } 252 253 254 static int 255 psh3tp_wsmouse_enable(void *self) 256 { 257 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 258 259 DPRINTFN(1, ("%s: wsmouse enable\n", sc->sc_dev.dv_xname)); 260 return (psh3tp_set_enable(sc, 1, PSH3TP_WSMOUSE_ENABLED)); 261 } 262 263 264 static void 265 psh3tp_wsmouse_disable(void *self) 266 { 267 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 268 269 DPRINTFN(1, ("%s: wsmouse disable\n", sc->sc_dev.dv_xname)); 270 psh3tp_set_enable(sc, 0, PSH3TP_WSMOUSE_ENABLED); 271 } 272 273 274 static int 275 psh3tp_intr(void *self) 276 { 277 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 278 279 uint8_t irr0; 280 uint8_t phdr, touched; 281 unsigned int steady, tremor_timeout; 282 283 irr0 = _reg_read_1(SH7709_IRR0); 284 if ((irr0 & IRR0_IRQ2) == 0) { 285 #ifdef DIAGNOSTIC 286 printf("%s: irr0 %02x?\n", sc->sc_dev.dv_xname, irr0); 287 #endif 288 return (0); 289 } 290 291 if (!sc->sc_enabled) { 292 DPRINTFN(1, ("%s: intr: !sc_enabled\n", sc->sc_dev.dv_xname)); 293 intc_intr_disable(SH7709_INTEVT2_IRQ2); 294 goto served; 295 } 296 297 /* 298 * Number of times the "touched" bit should be read 299 * consecutively. 300 */ 301 #define TREMOR_THRESHOLD 0x300 302 steady = 0; 303 tremor_timeout = TREMOR_THRESHOLD * 16; /* XXX: arbitrary */ 304 touched = TRUE; /* we start with "touched" state */ 305 306 do { 307 uint8_t state; 308 309 phdr = _reg_read_1(SH7709_PHDR); 310 state = ((phdr & PHDR_TP_PEN_UP) != PHDR_TP_PEN_UP); 311 312 if (state == touched) 313 ++steady; 314 else { 315 steady = 0; 316 touched = state; 317 } 318 319 if (--tremor_timeout == 0) { 320 DPRINTF(("%s: tremor timeout!\n", sc->sc_dev.dv_xname)); 321 goto served; 322 } 323 } while (steady < TREMOR_THRESHOLD); 324 325 if (touched) { 326 intc_intr_disable(SH7709_INTEVT2_IRQ2); 327 328 /* 329 * ADC readings are not stable yet, so schedule 330 * callout instead of accessing ADC from the interrupt 331 * handler only to immediately delay(). 332 */ 333 callout_reset(&sc->sc_touch_ch, 334 hz/32, psh3tp_start_polling, sc); 335 } else 336 DPRINTFN(1, ("%s: tremor\n", sc->sc_dev.dv_xname)); 337 served: 338 /* clear the interrupt */ 339 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ2); 340 341 return (1); 342 } 343 344 345 /* 346 * Called from the interrupt handler at spltty() upon first touch. 347 * Decide if we are going to report this touch as a mouse click/drag. 348 */ 349 static void 350 psh3tp_start_polling(void *self) 351 { 352 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 353 uint8_t phdr; 354 int rawx, rawy; 355 356 phdr = _reg_read_1(SH7709_PHDR); 357 if ((phdr & PHDR_TP_PEN_UP) == PHDR_TP_PEN_UP) { 358 DPRINTFN(2, ("%s: start: pen is not down\n", 359 sc->sc_dev.dv_xname)); 360 psh3tp_stop_polling(sc); 361 return; 362 } 363 364 psh3tp_get_raw_xy(&rawx, &rawy); 365 DPRINTFN(2, ("%s: start: %4d %4d -> ", 366 sc->sc_dev.dv_xname, rawx, rawy)); 367 368 if (sc->sc_enabled & PSH3TP_WSMOUSE_ENABLED) { 369 DPRINTFN(2, ("mouse\n")); 370 psh3tp_wsmouse_input(sc, rawx, rawy); 371 callout_reset(&sc->sc_touch_ch, 372 hz/32, psh3tp_callout_wsmouse, sc); 373 } else { 374 DPRINTFN(2, ("ignore\n")); 375 psh3tp_stop_polling(sc); 376 } 377 } 378 379 380 /* 381 * Re-enable touch panel interrupt. 382 * Called at spltty() when polling code detects pen-up. 383 */ 384 static void 385 psh3tp_stop_polling(struct psh3tp_softc *sc) 386 { 387 uint8_t irr0; 388 389 DPRINTFN(2, ("%s: stop\n", sc->sc_dev.dv_xname)); 390 391 /* clear pending interrupt signal before re-enabling the interrupt */ 392 irr0 = _reg_read_1(SH7709_IRR0); 393 if ((irr0 & IRR0_IRQ2) != 0) 394 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ2); 395 396 intc_intr_enable(SH7709_INTEVT2_IRQ2); 397 } 398 399 400 /* 401 * We are reporting this touch as a mouse click/drag. 402 */ 403 static void 404 psh3tp_callout_wsmouse(void *self) 405 { 406 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 407 uint8_t phdr; 408 int rawx, rawy; 409 int s; 410 411 s = spltty(); 412 413 if (!sc->sc_enabled) { 414 DPRINTFN(1, ("%s: wsmouse callout: !sc_enabled\n", 415 sc->sc_dev.dv_xname)); 416 splx(s); 417 return; 418 } 419 420 phdr = _reg_read_1(SH7709_PHDR); 421 if ((phdr & PHDR_TP_PEN_UP) != PHDR_TP_PEN_UP) { 422 psh3tp_get_raw_xy(&rawx, &rawy); 423 psh3tp_wsmouse_input(sc, rawx, rawy); /* mouse dragged */ 424 callout_schedule(&sc->sc_touch_ch, hz/32); 425 } else { 426 wsmouse_input( /* button up */ 427 sc->sc_wsmousedev, 0, 0, 0, 0, WSMOUSE_INPUT_DELTA); 428 psh3tp_stop_polling(sc); 429 } 430 splx(s); 431 } 432 433 434 /* 435 * Report mouse click/drag. 436 */ 437 static void 438 psh3tp_wsmouse_input(struct psh3tp_softc *sc, int rawx, int rawy) 439 { 440 int x, y; 441 442 tpcalib_trans(&sc->sc_tpcalib, rawx, rawy, &x, &y); 443 444 DPRINTFN(3, ("%s: %4d %4d -> %3d %3d\n", 445 sc->sc_dev.dv_xname, rawx, rawy, x, y)); 446 447 wsmouse_input(sc->sc_wsmousedev, 448 1, /* button */ 449 x, y, 450 0, /* flags */ 451 WSMOUSE_INPUT_ABSOLUTE_X | WSMOUSE_INPUT_ABSOLUTE_Y); 452 } 453 454 455 /* 456 * Read raw X/Y coordinates from the ADC. 457 */ 458 static void 459 psh3tp_get_raw_xy(int *rawxp, int *rawyp) 460 { 461 uint8_t scpdr; 462 463 /* X axis */ 464 scpdr = _reg_read_1(SH7709_SCPDR); 465 scpdr &= ~SCPDR_TP_SCAN_DISABLE; 466 scpdr |= (SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_X); 467 _reg_write_1(SH7709_SCPDR, scpdr); 468 delay(40); 469 470 *rawxp = adc_sample_channel(ADC_CHANNEL_TP_X); 471 472 /* Y axis */ 473 scpdr = _reg_read_1(SH7709_SCPDR); 474 scpdr &= ~SCPDR_TP_SCAN_X; 475 scpdr |= (SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_Y); 476 _reg_write_1(SH7709_SCPDR, scpdr); 477 delay(40); 478 479 *rawyp = adc_sample_channel(ADC_CHANNEL_TP_Y); 480 481 /* restore SCPDR */ 482 scpdr = _reg_read_1(SH7709_SCPDR); 483 scpdr &= ~(SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_Y); 484 scpdr |= SCPDR_TP_SCAN_DISABLE; 485 _reg_write_1(SH7709_SCPDR, scpdr); 486 } 487 488 489 static int 490 psh3tp_wsmouse_ioctl( 491 void *self, u_long cmd, caddr_t data, int flag, struct proc *p) 492 { 493 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 494 495 return (hpc_tpanel_ioctl(&sc->sc_tpcalib, cmd, data, flag, p)); 496 } 497
Indexes created Tue Sep 30 11:09:46 GMT 2025