psh3tp.c revision 1.8
1 /* $NetBSD: psh3tp.c,v 1.8 2007/02/22 05:39:44 thorpej 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/types.h> 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/errno.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/systm.h> 38 #include <sys/callout.h> 39 40 #include "opt_psh3tp.h" 41 42 #include <dev/wscons/wsconsio.h> 43 #include <dev/wscons/wsmousevar.h> 44 #include <dev/hpc/hpctpanelvar.h> 45 46 #include <machine/platid.h> 47 #include <machine/platid_mask.h> 48 49 #include <machine/intr.h> 50 51 #include <sh3/exception.h> 52 #include <sh3/intcreg.h> 53 #include <sh3/pfcreg.h> 54 #include <sh3/adcreg.h> 55 56 #include <sh3/dev/adcvar.h> 57 58 59 #ifdef PSH3TP_DEBUG 60 volatile int psh3tp_debug = 4; 61 #define DPRINTF_PRINTF printf_nolog 62 #define DPRINTF(arg) if (psh3tp_debug) DPRINTF_PRINTF arg 63 #define DPRINTFN(n, arg) if (psh3tp_debug > (n)) DPRINTF_PRINTF arg 64 #else 65 #define DPRINTF(arg) ((void)0) 66 #define DPRINTFN(n, arg) ((void)0) 67 #endif 68 69 70 /* 71 * PFC bits pertinent to PERSONA HPW-50PA touch-panel 72 */ 73 #define PHDR_TP_PEN_UP 0x40 74 #define SCPDR_TP_SCAN_ENABLE 0x20 75 #define SCPDR_TP_SCAN_DISABLE 0x01 76 #define SCPDR_TP_SCAN_X 0x06 77 #define SCPDR_TP_SCAN_Y 0x09 78 79 /* 80 * A/D converter channels to get x/y from 81 */ 82 #define ADC_CHANNEL_TP_X 1 83 #define ADC_CHANNEL_TP_Y 0 84 85 /* 86 * Default (read: my device) raw X/Y values for framebuffer edges. 87 */ 88 #define PSH3TP_FB_RIGHT 56 89 #define PSH3TP_FB_LEFT 969 90 #define PSH3TP_FB_TOP 848 91 #define PSH3TP_FB_BOTTOM 121 92 93 94 struct psh3tp_softc { 95 struct device sc_dev; 96 97 #define PSH3TP_WSMOUSE_ENABLED 0x01 98 int sc_enabled; 99 struct callout sc_touch_ch; 100 struct device *sc_wsmousedev; 101 struct tpcalib_softc sc_tpcalib; /* calibration info for wsmouse */ 102 }; 103 104 105 /* config machinery */ 106 static int psh3tp_match(struct device *, struct cfdata *, void *); 107 static void psh3tp_attach(struct device *, struct device *, void *); 108 109 /* wsmouse accessops */ 110 static int psh3tp_wsmouse_enable(void *); 111 static int psh3tp_wsmouse_ioctl(void *, u_long, caddr_t, int, struct lwp *); 112 static void psh3tp_wsmouse_disable(void *); 113 114 /* internal driver routines */ 115 static void psh3tp_enable(struct psh3tp_softc *); 116 static void psh3tp_disable(struct psh3tp_softc *); 117 static int psh3tp_set_enable(struct psh3tp_softc *, int, int); 118 static int psh3tp_intr(void *); 119 static void psh3tp_start_polling(void *); 120 static void psh3tp_stop_polling(struct psh3tp_softc *); 121 static void psh3tp_callout_wsmouse(void *); 122 static void psh3tp_wsmouse_input(struct psh3tp_softc *, int, int); 123 static void psh3tp_get_raw_xy(int *, int *); 124 125 126 const struct wsmouse_accessops psh3tp_accessops = { 127 psh3tp_wsmouse_enable, 128 psh3tp_wsmouse_ioctl, 129 psh3tp_wsmouse_disable 130 }; 131 132 static const struct wsmouse_calibcoords psh3tp_default_calib = { 133 0, 0, 639, 239, 134 4, 135 {{ PSH3TP_FB_LEFT, PSH3TP_FB_TOP, 0, 0 }, 136 { PSH3TP_FB_RIGHT, PSH3TP_FB_TOP, 639, 0 }, 137 { PSH3TP_FB_LEFT, PSH3TP_FB_BOTTOM, 0, 239 }, 138 { PSH3TP_FB_RIGHT, PSH3TP_FB_BOTTOM, 639, 239 }} 139 }; 140 141 142 CFATTACH_DECL(psh3tp, sizeof(struct psh3tp_softc), 143 psh3tp_match, psh3tp_attach, NULL, NULL); 144 145 146 /* ARGSUSED */ 147 static int 148 psh3tp_match(struct device *parent __unused, struct cfdata *cf, 149 void *aux __unused) 150 { 151 152 if (!platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 153 return 0; 154 155 if (strcmp(cf->cf_name, "psh3tp") != 0) 156 return 0; 157 158 return 1; 159 } 160 161 162 /* 163 * Attach the touch panel driver and its wsmouse child. 164 * 165 * Note that we have to use submatch to distinguish between child because 166 * wsmouse_match matches unconditionally. 167 */ 168 /* ARGSUSED */ 169 static void 170 psh3tp_attach(struct device *parent __unused, struct device *self, 171 void *aux __unused) 172 { 173 struct psh3tp_softc *sc = device_private(self); 174 struct wsmousedev_attach_args wsma; 175 176 aprint_naive("\n"); 177 aprint_normal("\n"); 178 179 sc->sc_enabled = 0; 180 181 /* touch-panel as a pointing device */ 182 wsma.accessops = &psh3tp_accessops; 183 wsma.accesscookie = sc; 184 185 sc->sc_wsmousedev = config_found_ia( 186 self, "wsmousedev", &wsma, wsmousedevprint); 187 if (sc->sc_wsmousedev == NULL) 188 return; 189 190 /* init calibration, set default parameters */ 191 tpcalib_init(&sc->sc_tpcalib); 192 tpcalib_ioctl(&sc->sc_tpcalib, WSMOUSEIO_SCALIBCOORDS, 193 (caddr_t)__UNCONST(&psh3tp_default_calib), 0, 0); 194 195 /* used when in polling mode */ 196 callout_init(&sc->sc_touch_ch); 197 198 /* establish interrupt handler, but disable until opened */ 199 intc_intr_establish(SH7709_INTEVT2_IRQ2, 200 IST_EDGE, IPL_TTY, psh3tp_intr, sc); 201 intc_intr_disable(SH7709_INTEVT2_IRQ2); 202 } 203 204 205 /* 206 * Enable touch panel: we start in interrupt mode. 207 * Must be called at spltty(). 208 */ 209 /* ARGSUSED */ 210 static void 211 psh3tp_enable(struct psh3tp_softc *sc __unused) 212 { 213 214 DPRINTFN(2, ("%s: enable\n", sc->sc_dev.dv_xname)); 215 intc_intr_enable(SH7709_INTEVT2_IRQ2); 216 } 217 218 219 /* 220 * Disable touch panel: disable interrupt, cancel pending callout. 221 * Must be called at spltty(). 222 */ 223 static void 224 psh3tp_disable(struct psh3tp_softc *sc) 225 { 226 227 DPRINTFN(2, ("%s: disable\n", sc->sc_dev.dv_xname)); 228 intc_intr_disable(SH7709_INTEVT2_IRQ2); 229 callout_stop(&sc->sc_touch_ch); 230 } 231 232 233 static int 234 psh3tp_set_enable(struct psh3tp_softc *sc, int on, int child) 235 { 236 int s = spltty(); 237 238 if (on) { 239 if (!sc->sc_enabled) 240 psh3tp_enable(sc); 241 sc->sc_enabled |= child; 242 } else { 243 sc->sc_enabled &= ~child; 244 if (!sc->sc_enabled) 245 psh3tp_disable(sc); 246 } 247 248 splx(s); 249 return 0; 250 } 251 252 253 static int 254 psh3tp_wsmouse_enable(void *self) 255 { 256 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 257 258 DPRINTFN(1, ("%s: wsmouse enable\n", sc->sc_dev.dv_xname)); 259 return psh3tp_set_enable(sc, 1, PSH3TP_WSMOUSE_ENABLED); 260 } 261 262 263 static void 264 psh3tp_wsmouse_disable(void *self) 265 { 266 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 267 268 DPRINTFN(1, ("%s: wsmouse disable\n", sc->sc_dev.dv_xname)); 269 psh3tp_set_enable(sc, 0, PSH3TP_WSMOUSE_ENABLED); 270 } 271 272 273 static int 274 psh3tp_intr(void *self) 275 { 276 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 277 278 uint8_t irr0; 279 uint8_t phdr, touched; 280 unsigned int steady, tremor_timeout; 281 282 irr0 = _reg_read_1(SH7709_IRR0); 283 if ((irr0 & IRR0_IRQ2) == 0) { 284 #ifdef DIAGNOSTIC 285 printf("%s: irr0 %02x?\n", sc->sc_dev.dv_xname, irr0); 286 #endif 287 return 0; 288 } 289 290 if (!sc->sc_enabled) { 291 DPRINTFN(1, ("%s: intr: !sc_enabled\n", sc->sc_dev.dv_xname)); 292 intc_intr_disable(SH7709_INTEVT2_IRQ2); 293 goto served; 294 } 295 296 /* 297 * Number of times the "touched" bit should be read 298 * consecutively. 299 */ 300 #define TREMOR_THRESHOLD 0x300 301 steady = 0; 302 tremor_timeout = TREMOR_THRESHOLD * 16; /* XXX: arbitrary */ 303 touched = true; /* we start with "touched" state */ 304 305 do { 306 uint8_t state; 307 308 phdr = _reg_read_1(SH7709_PHDR); 309 state = ((phdr & PHDR_TP_PEN_UP) != PHDR_TP_PEN_UP); 310 311 if (state == touched) 312 ++steady; 313 else { 314 steady = 0; 315 touched = state; 316 } 317 318 if (--tremor_timeout == 0) { 319 DPRINTF(("%s: tremor timeout!\n", sc->sc_dev.dv_xname)); 320 goto served; 321 } 322 } while (steady < TREMOR_THRESHOLD); 323 324 if (touched) { 325 intc_intr_disable(SH7709_INTEVT2_IRQ2); 326 327 /* 328 * ADC readings are not stable yet, so schedule 329 * callout instead of accessing ADC from the interrupt 330 * handler only to immediately delay(). 331 */ 332 callout_reset(&sc->sc_touch_ch, 333 hz/32, psh3tp_start_polling, sc); 334 } else 335 DPRINTFN(1, ("%s: tremor\n", sc->sc_dev.dv_xname)); 336 served: 337 /* clear the interrupt */ 338 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ2); 339 340 return 1; 341 } 342 343 344 /* 345 * Called from the interrupt handler at spltty() upon first touch. 346 * Decide if we are going to report this touch as a mouse click/drag. 347 */ 348 static void 349 psh3tp_start_polling(void *self) 350 { 351 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 352 uint8_t phdr; 353 int rawx, rawy; 354 355 phdr = _reg_read_1(SH7709_PHDR); 356 if ((phdr & PHDR_TP_PEN_UP) == PHDR_TP_PEN_UP) { 357 DPRINTFN(2, ("%s: start: pen is not down\n", 358 sc->sc_dev.dv_xname)); 359 psh3tp_stop_polling(sc); 360 return; 361 } 362 363 psh3tp_get_raw_xy(&rawx, &rawy); 364 DPRINTFN(2, ("%s: start: %4d %4d -> ", 365 sc->sc_dev.dv_xname, rawx, rawy)); 366 367 if (sc->sc_enabled & PSH3TP_WSMOUSE_ENABLED) { 368 DPRINTFN(2, ("mouse\n")); 369 psh3tp_wsmouse_input(sc, rawx, rawy); 370 callout_reset(&sc->sc_touch_ch, 371 hz/32, psh3tp_callout_wsmouse, sc); 372 } else { 373 DPRINTFN(2, ("ignore\n")); 374 psh3tp_stop_polling(sc); 375 } 376 } 377 378 379 /* 380 * Re-enable touch panel interrupt. 381 * Called at spltty() when polling code detects pen-up. 382 */ 383 /* ARGSUSED */ 384 static void 385 psh3tp_stop_polling(struct psh3tp_softc *sc __unused) 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, 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, 0, 0, 450 WSMOUSE_INPUT_ABSOLUTE_X | WSMOUSE_INPUT_ABSOLUTE_Y); 451 } 452 453 454 /* 455 * Read raw X/Y coordinates from the ADC. 456 */ 457 static void 458 psh3tp_get_raw_xy(int *rawxp, int *rawyp) 459 { 460 uint8_t scpdr; 461 462 /* X axis */ 463 scpdr = _reg_read_1(SH7709_SCPDR); 464 scpdr &= ~SCPDR_TP_SCAN_DISABLE; 465 scpdr |= (SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_X); 466 _reg_write_1(SH7709_SCPDR, scpdr); 467 delay(40); 468 469 *rawxp = adc_sample_channel(ADC_CHANNEL_TP_X); 470 471 /* Y axis */ 472 scpdr = _reg_read_1(SH7709_SCPDR); 473 scpdr &= ~SCPDR_TP_SCAN_X; 474 scpdr |= (SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_Y); 475 _reg_write_1(SH7709_SCPDR, scpdr); 476 delay(40); 477 478 *rawyp = adc_sample_channel(ADC_CHANNEL_TP_Y); 479 480 /* restore SCPDR */ 481 scpdr = _reg_read_1(SH7709_SCPDR); 482 scpdr &= ~(SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_Y); 483 scpdr |= SCPDR_TP_SCAN_DISABLE; 484 _reg_write_1(SH7709_SCPDR, scpdr); 485 } 486 487 488 static int 489 psh3tp_wsmouse_ioctl(void *self, u_long cmd, caddr_t data, int flag, 490 struct lwp *l) 491 { 492 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 493 494 return hpc_tpanel_ioctl(&sc->sc_tpcalib, cmd, data, flag, l); 495 } 496
Indexes created Tue Sep 30 10:09:55 GMT 2025