psh3tp.c revision 1.12
1 /* $NetBSD: psh3tp.c,v 1.12 2008/03/31 15:49:29 kiyohara 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 device_t sc_dev; 96 97 #define PSH3TP_WSMOUSE_ENABLED 0x01 98 int sc_enabled; 99 struct callout sc_touch_ch; 100 device_t sc_wsmousedev; 101 struct tpcalib_softc sc_tpcalib; /* calibration info for wsmouse */ 102 }; 103 104 105 /* config machinery */ 106 static int psh3tp_match(device_t, struct cfdata *, void *); 107 static void psh3tp_attach(device_t, device_t, void *); 108 109 /* wsmouse accessops */ 110 static int psh3tp_wsmouse_enable(void *); 111 static int psh3tp_wsmouse_ioctl(void *, u_long, void *, 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_NEW(psh3tp, sizeof(struct psh3tp_softc), 143 psh3tp_match, psh3tp_attach, NULL, NULL); 144 145 146 /* ARGSUSED */ 147 static int 148 psh3tp_match(device_t parent __unused, struct cfdata *cf, void *aux __unused) 149 { 150 151 if (!platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA)) 152 return 0; 153 154 if (strcmp(cf->cf_name, "psh3tp") != 0) 155 return 0; 156 157 return 1; 158 } 159 160 161 /* 162 * Attach the touch panel driver and its wsmouse child. 163 * 164 * Note that we have to use submatch to distinguish between child because 165 * wsmouse_match matches unconditionally. 166 */ 167 /* ARGSUSED */ 168 static void 169 psh3tp_attach(device_t parent __unused, device_t self, void *aux __unused) 170 { 171 struct psh3tp_softc *sc = device_private(self); 172 struct wsmousedev_attach_args wsma; 173 174 aprint_naive("\n"); 175 aprint_normal("\n"); 176 177 sc->sc_dev = self; 178 sc->sc_enabled = 0; 179 180 /* touch-panel as a pointing device */ 181 wsma.accessops = &psh3tp_accessops; 182 wsma.accesscookie = sc; 183 184 sc->sc_wsmousedev = config_found_ia( 185 self, "wsmousedev", &wsma, wsmousedevprint); 186 if (sc->sc_wsmousedev == NULL) 187 return; 188 189 /* init calibration, set default parameters */ 190 tpcalib_init(&sc->sc_tpcalib); 191 tpcalib_ioctl(&sc->sc_tpcalib, WSMOUSEIO_SCALIBCOORDS, 192 (void *)__UNCONST(&psh3tp_default_calib), 0, 0); 193 194 /* used when in polling mode */ 195 callout_init(&sc->sc_touch_ch, 0); 196 197 /* establish interrupt handler, but disable until opened */ 198 intc_intr_establish(SH7709_INTEVT2_IRQ2, 199 IST_EDGE, IPL_TTY, psh3tp_intr, sc); 200 intc_intr_disable(SH7709_INTEVT2_IRQ2); 201 } 202 203 204 /* 205 * Enable touch panel: we start in interrupt mode. 206 * Must be called at spltty(). 207 */ 208 /* ARGSUSED */ 209 static void 210 psh3tp_enable(struct psh3tp_softc *sc __unused) 211 { 212 213 DPRINTFN(2, ("%s: enable\n", sc->sc_dev.dv_xname)); 214 intc_intr_enable(SH7709_INTEVT2_IRQ2); 215 } 216 217 218 /* 219 * Disable touch panel: disable interrupt, cancel pending callout. 220 * Must be called at spltty(). 221 */ 222 static void 223 psh3tp_disable(struct psh3tp_softc *sc) 224 { 225 226 DPRINTFN(2, ("%s: disable\n", sc->sc_dev.dv_xname)); 227 intc_intr_disable(SH7709_INTEVT2_IRQ2); 228 callout_stop(&sc->sc_touch_ch); 229 } 230 231 232 static int 233 psh3tp_set_enable(struct psh3tp_softc *sc, int on, int child) 234 { 235 int s = spltty(); 236 237 if (on) { 238 if (!sc->sc_enabled) 239 psh3tp_enable(sc); 240 sc->sc_enabled |= child; 241 } else { 242 sc->sc_enabled &= ~child; 243 if (!sc->sc_enabled) 244 psh3tp_disable(sc); 245 } 246 247 splx(s); 248 return 0; 249 } 250 251 252 static int 253 psh3tp_wsmouse_enable(void *self) 254 { 255 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 256 257 DPRINTFN(1, ("%s: wsmouse enable\n", sc->sc_dev.dv_xname)); 258 return psh3tp_set_enable(sc, 1, PSH3TP_WSMOUSE_ENABLED); 259 } 260 261 262 static void 263 psh3tp_wsmouse_disable(void *self) 264 { 265 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 266 267 DPRINTFN(1, ("%s: wsmouse disable\n", sc->sc_dev.dv_xname)); 268 psh3tp_set_enable(sc, 0, PSH3TP_WSMOUSE_ENABLED); 269 } 270 271 272 static int 273 psh3tp_intr(void *self) 274 { 275 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 276 277 uint8_t irr0; 278 uint8_t phdr, touched; 279 unsigned int steady, tremor_timeout; 280 281 irr0 = _reg_read_1(SH7709_IRR0); 282 if ((irr0 & IRR0_IRQ2) == 0) { 283 #ifdef DIAGNOSTIC 284 printf("%s: irr0 %02x?\n", sc->sc_dev.dv_xname, irr0); 285 #endif 286 return 0; 287 } 288 289 if (!sc->sc_enabled) { 290 DPRINTFN(1, ("%s: intr: !sc_enabled\n", sc->sc_dev.dv_xname)); 291 intc_intr_disable(SH7709_INTEVT2_IRQ2); 292 goto served; 293 } 294 295 /* 296 * Number of times the "touched" bit should be read 297 * consecutively. 298 */ 299 #define TREMOR_THRESHOLD 0x300 300 steady = 0; 301 tremor_timeout = TREMOR_THRESHOLD * 16; /* XXX: arbitrary */ 302 touched = true; /* we start with "touched" state */ 303 304 do { 305 uint8_t state; 306 307 phdr = _reg_read_1(SH7709_PHDR); 308 state = ((phdr & PHDR_TP_PEN_UP) != PHDR_TP_PEN_UP); 309 310 if (state == touched) 311 ++steady; 312 else { 313 steady = 0; 314 touched = state; 315 } 316 317 if (--tremor_timeout == 0) { 318 DPRINTF(("%s: tremor timeout!\n", sc->sc_dev.dv_xname)); 319 goto served; 320 } 321 } while (steady < TREMOR_THRESHOLD); 322 323 if (touched) { 324 intc_intr_disable(SH7709_INTEVT2_IRQ2); 325 326 /* 327 * ADC readings are not stable yet, so schedule 328 * callout instead of accessing ADC from the interrupt 329 * handler only to immediately delay(). 330 */ 331 callout_reset(&sc->sc_touch_ch, 332 hz/32, psh3tp_start_polling, sc); 333 } else 334 DPRINTFN(1, ("%s: tremor\n", sc->sc_dev.dv_xname)); 335 served: 336 /* clear the interrupt */ 337 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ2); 338 339 return 1; 340 } 341 342 343 /* 344 * Called from the interrupt handler at spltty() upon first touch. 345 * Decide if we are going to report this touch as a mouse click/drag. 346 */ 347 static void 348 psh3tp_start_polling(void *self) 349 { 350 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 351 uint8_t phdr; 352 int rawx, rawy; 353 354 phdr = _reg_read_1(SH7709_PHDR); 355 if ((phdr & PHDR_TP_PEN_UP) == PHDR_TP_PEN_UP) { 356 DPRINTFN(2, ("%s: start: pen is not down\n", 357 sc->sc_dev.dv_xname)); 358 psh3tp_stop_polling(sc); 359 return; 360 } 361 362 psh3tp_get_raw_xy(&rawx, &rawy); 363 DPRINTFN(2, ("%s: start: %4d %4d -> ", 364 sc->sc_dev.dv_xname, rawx, rawy)); 365 366 if (sc->sc_enabled & PSH3TP_WSMOUSE_ENABLED) { 367 DPRINTFN(2, ("mouse\n")); 368 psh3tp_wsmouse_input(sc, rawx, rawy); 369 callout_reset(&sc->sc_touch_ch, 370 hz/32, psh3tp_callout_wsmouse, sc); 371 } else { 372 DPRINTFN(2, ("ignore\n")); 373 psh3tp_stop_polling(sc); 374 } 375 } 376 377 378 /* 379 * Re-enable touch panel interrupt. 380 * Called at spltty() when polling code detects pen-up. 381 */ 382 /* ARGSUSED */ 383 static void 384 psh3tp_stop_polling(struct psh3tp_softc *sc __unused) 385 { 386 uint8_t irr0; 387 388 DPRINTFN(2, ("%s: stop\n", sc->sc_dev.dv_xname)); 389 390 /* clear pending interrupt signal before re-enabling the interrupt */ 391 irr0 = _reg_read_1(SH7709_IRR0); 392 if ((irr0 & IRR0_IRQ2) != 0) 393 _reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ2); 394 395 intc_intr_enable(SH7709_INTEVT2_IRQ2); 396 } 397 398 399 /* 400 * We are reporting this touch as a mouse click/drag. 401 */ 402 static void 403 psh3tp_callout_wsmouse(void *self) 404 { 405 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 406 uint8_t phdr; 407 int rawx, rawy; 408 int s; 409 410 s = spltty(); 411 412 if (!sc->sc_enabled) { 413 DPRINTFN(1, ("%s: wsmouse callout: !sc_enabled\n", 414 sc->sc_dev.dv_xname)); 415 splx(s); 416 return; 417 } 418 419 phdr = _reg_read_1(SH7709_PHDR); 420 if ((phdr & PHDR_TP_PEN_UP) != PHDR_TP_PEN_UP) { 421 psh3tp_get_raw_xy(&rawx, &rawy); 422 psh3tp_wsmouse_input(sc, rawx, rawy); /* mouse dragged */ 423 callout_schedule(&sc->sc_touch_ch, hz/32); 424 } else { 425 wsmouse_input( /* button up */ 426 sc->sc_wsmousedev, 0, 0, 0, 0, 0, WSMOUSE_INPUT_DELTA); 427 psh3tp_stop_polling(sc); 428 } 429 splx(s); 430 } 431 432 433 /* 434 * Report mouse click/drag. 435 */ 436 static void 437 psh3tp_wsmouse_input(struct psh3tp_softc *sc, int rawx, int rawy) 438 { 439 int x, y; 440 441 tpcalib_trans(&sc->sc_tpcalib, rawx, rawy, &x, &y); 442 443 DPRINTFN(3, ("%s: %4d %4d -> %3d %3d\n", 444 sc->sc_dev.dv_xname, rawx, rawy, x, y)); 445 446 wsmouse_input(sc->sc_wsmousedev, 447 1, /* button */ 448 x, y, 0, 0, 449 WSMOUSE_INPUT_ABSOLUTE_X | WSMOUSE_INPUT_ABSOLUTE_Y); 450 } 451 452 453 /* 454 * Read raw X/Y coordinates from the ADC. 455 */ 456 static void 457 psh3tp_get_raw_xy(int *rawxp, int *rawyp) 458 { 459 uint8_t scpdr; 460 461 /* X axis */ 462 scpdr = _reg_read_1(SH7709_SCPDR); 463 scpdr &= ~SCPDR_TP_SCAN_DISABLE; 464 scpdr |= (SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_X); 465 _reg_write_1(SH7709_SCPDR, scpdr); 466 delay(40); 467 468 *rawxp = adc_sample_channel(ADC_CHANNEL_TP_X); 469 470 /* Y axis */ 471 scpdr = _reg_read_1(SH7709_SCPDR); 472 scpdr &= ~SCPDR_TP_SCAN_X; 473 scpdr |= (SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_Y); 474 _reg_write_1(SH7709_SCPDR, scpdr); 475 delay(40); 476 477 *rawyp = adc_sample_channel(ADC_CHANNEL_TP_Y); 478 479 /* restore SCPDR */ 480 scpdr = _reg_read_1(SH7709_SCPDR); 481 scpdr &= ~(SCPDR_TP_SCAN_ENABLE | SCPDR_TP_SCAN_Y); 482 scpdr |= SCPDR_TP_SCAN_DISABLE; 483 _reg_write_1(SH7709_SCPDR, scpdr); 484 } 485 486 487 static int 488 psh3tp_wsmouse_ioctl(void *self, u_long cmd, void *data, int flag, 489 struct lwp *l) 490 { 491 struct psh3tp_softc *sc = (struct psh3tp_softc *)self; 492 493 return hpc_tpanel_ioctl(&sc->sc_tpcalib, cmd, data, flag, l); 494 } 495
Indexes created Tue Sep 30 07:10:03 GMT 2025