elantech.c revision 1.4.6.1
1 /* $NetBSD: elantech.c,v 1.4.6.1 2012/02/18 07:34:55 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "opt_pms.h" 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: elantech.c,v 1.4.6.1 2012/02/18 07:34:55 mrg Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/device.h> 37 #include <sys/kernel.h> 38 #include <sys/sysctl.h> 39 #include <sys/bus.h> 40 41 #include <dev/wscons/wsconsio.h> 42 #include <dev/wscons/wsmousevar.h> 43 44 #include <dev/pckbport/pckbportvar.h> 45 #include <dev/pckbport/elantechreg.h> 46 #include <dev/pckbport/elantechvar.h> 47 #include <dev/pckbport/pmsreg.h> 48 #include <dev/pckbport/pmsvar.h> 49 50 /* #define ELANTECH_DEBUG */ 51 52 static int elantech_xy_unprecision_nodenum; 53 static int elantech_z_unprecision_nodenum; 54 55 static int elantech_xy_unprecision = 2; 56 static int elantech_z_unprecision = 3; 57 58 struct elantech_packet { 59 int16_t ep_x, ep_y, ep_z; 60 int8_t ep_buttons; 61 uint8_t ep_nfingers; 62 }; 63 64 static int 65 pms_sysctl_elantech_verify(SYSCTLFN_ARGS) 66 { 67 int error, t; 68 struct sysctlnode node; 69 70 node = *rnode; 71 t = *(int *)rnode->sysctl_data; 72 node.sysctl_data = &t; 73 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 74 if (error || newp == NULL) 75 return error; 76 77 if (node.sysctl_num == elantech_xy_unprecision_nodenum || 78 node.sysctl_num == elantech_z_unprecision_nodenum) { 79 if (t < 0 || t > 7) 80 return EINVAL; 81 } else 82 return EINVAL; 83 84 *(int *)rnode->sysctl_data = t; 85 86 return 0; 87 } 88 89 static void 90 pms_sysctl_elantech(struct sysctllog **clog) 91 { 92 const struct sysctlnode *node; 93 int rc, root_num; 94 95 if ((rc = sysctl_createv(clog, 0, NULL, NULL, 96 CTLFLAG_PERMANENT, CTLTYPE_NODE, "hw", NULL, 97 NULL, 0, NULL, 0, CTL_HW, CTL_EOL)) != 0) 98 goto err; 99 100 if ((rc = sysctl_createv(clog, 0, NULL, &node, 101 CTLFLAG_PERMANENT, CTLTYPE_NODE, "elantech", 102 SYSCTL_DESCR("Elantech touchpad controls"), 103 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0) 104 goto err; 105 106 root_num = node->sysctl_num; 107 108 if ((rc = sysctl_createv(clog, 0, NULL, &node, 109 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 110 CTLTYPE_INT, "xy_precision_shift", 111 SYSCTL_DESCR("X/Y-axis precision shift value"), 112 pms_sysctl_elantech_verify, 0, 113 &elantech_xy_unprecision, 114 0, CTL_HW, root_num, CTL_CREATE, 115 CTL_EOL)) != 0) 116 goto err; 117 118 elantech_xy_unprecision_nodenum = node->sysctl_num; 119 120 if ((rc = sysctl_createv(clog, 0, NULL, &node, 121 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 122 CTLTYPE_INT, "z_precision_shift", 123 SYSCTL_DESCR("Z-axis precision shift value"), 124 pms_sysctl_elantech_verify, 0, 125 &elantech_z_unprecision, 126 0, CTL_HW, root_num, CTL_CREATE, 127 CTL_EOL)) != 0) 128 goto err; 129 130 elantech_z_unprecision_nodenum = node->sysctl_num; 131 return; 132 133 err: 134 aprint_error("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 135 } 136 137 static int 138 pms_elantech_read_1(pckbport_tag_t tag, pckbport_slot_t slot, uint8_t reg, 139 uint8_t *val) 140 { 141 int res; 142 uint8_t cmd; 143 uint8_t resp[3]; 144 145 cmd = ELANTECH_CUSTOM_CMD; 146 res = pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 147 cmd = ELANTECH_REG_READ; 148 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 149 cmd = ELANTECH_CUSTOM_CMD; 150 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 151 cmd = reg; 152 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 153 cmd = PMS_SEND_DEV_STATUS; 154 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 3, resp, 0); 155 156 if (res == 0) 157 *val = resp[0]; 158 159 return res; 160 } 161 162 static int 163 pms_elantech_write_1(pckbport_tag_t tag, pckbport_slot_t slot, uint8_t reg, 164 uint8_t val) 165 { 166 int res; 167 uint8_t cmd; 168 169 cmd = ELANTECH_CUSTOM_CMD; 170 res = pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 171 cmd = ELANTECH_REG_WRITE; 172 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 173 cmd = ELANTECH_CUSTOM_CMD; 174 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 175 cmd = reg; 176 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 177 cmd = ELANTECH_CUSTOM_CMD; 178 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 179 cmd = val; 180 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 181 cmd = PMS_SET_SCALE11; 182 res |= pckbport_poll_cmd(tag, slot, &cmd, 1, 0, NULL, 0); 183 184 return res; 185 } 186 187 static int 188 pms_elantech_init(struct pms_softc *psc) 189 { 190 uint8_t val; 191 int res; 192 193 /* set absolute mode */ 194 res = pms_elantech_write_1(psc->sc_kbctag, psc->sc_kbcslot, 0x10, 0x54); 195 if (res) 196 return res; 197 res = pms_elantech_write_1(psc->sc_kbctag, psc->sc_kbcslot, 0x11, 0x88); 198 if (res) 199 return res; 200 res = pms_elantech_write_1(psc->sc_kbctag, psc->sc_kbcslot, 0x21, 0x60); 201 if (res) 202 return res; 203 204 res = pms_elantech_read_1(psc->sc_kbctag, psc->sc_kbcslot, 0x10, &val); 205 206 if (res) 207 aprint_error_dev(psc->sc_dev, "couldn't set absolute mode\n"); 208 209 return res; 210 } 211 212 static void 213 pms_elantech_input(void *opaque, int data) 214 { 215 struct pms_softc *psc = opaque; 216 struct elantech_softc *sc = &psc->u.elantech; 217 struct elantech_packet ep; 218 int s; 219 220 if (!psc->sc_enabled) 221 return; 222 223 if (sc->version >= 0x020800) { 224 if ((psc->inputstate == 0 && (data & 0x0c) != 0x04) || 225 (psc->inputstate == 3 && (data & 0x0f) != 0x02)) { 226 aprint_debug_dev(psc->sc_dev, "waiting for sync..\n"); 227 psc->inputstate = 0; 228 return; 229 } 230 } else { 231 if ((psc->inputstate == 0 && (data & 0x0c) != 0x0c) || 232 (psc->inputstate == 3 && (data & 0x0e) != 0x08)) { 233 aprint_debug_dev(psc->sc_dev, "waiting for sync..\n"); 234 psc->inputstate = 0; 235 return; 236 } 237 } 238 239 psc->packet[psc->inputstate++] = data & 0xff; 240 if (psc->inputstate != 6) 241 return; 242 243 psc->inputstate = 0; 244 245 ep.ep_nfingers = (psc->packet[0] & 0xc0) >> 6; 246 ep.ep_buttons = 0; 247 ep.ep_buttons = psc->packet[0] & 1; /* left button */ 248 ep.ep_buttons |= (psc->packet[0] & 2) << 1; /* right button */ 249 250 if (ep.ep_nfingers == 0 || ep.ep_nfingers != sc->last_nfingers) 251 sc->initializing = true; 252 253 switch (ep.ep_nfingers) { 254 case 0: 255 /* FALLTHROUGH */ 256 case 1: 257 ep.ep_x = ((int16_t)(psc->packet[1] & 0xf) << 8) | psc->packet[2]; 258 ep.ep_y = ((int16_t)(psc->packet[4] & 0xf) << 8) | psc->packet[5]; 259 260 aprint_debug_dev(psc->sc_dev, 261 "%d finger detected in elantech mode:\n", ep.ep_nfingers); 262 aprint_debug_dev(psc->sc_dev, 263 " X=%d Y=%d\n", ep.ep_x, ep.ep_y); 264 aprint_debug_dev(psc->sc_dev, 265 " %02x %02x %02x %02x %02x %02x\n", 266 psc->packet[0], psc->packet[1], psc->packet[2], 267 psc->packet[3], psc->packet[4], psc->packet[5]); 268 269 s = spltty(); 270 wsmouse_input(psc->sc_wsmousedev, ep.ep_buttons, 271 sc->initializing ? 272 0 : (ep.ep_x - sc->last_x) >> elantech_xy_unprecision, 273 sc->initializing ? 274 0 : (ep.ep_y - sc->last_y) >> elantech_xy_unprecision, 275 0, 0, 276 WSMOUSE_INPUT_DELTA); 277 splx(s); 278 279 if (sc->initializing == true || 280 ((ep.ep_x - sc->last_x) >> elantech_xy_unprecision) != 0) 281 sc->last_x = ep.ep_x; 282 if (sc->initializing == true || 283 ((ep.ep_y - sc->last_y) >> elantech_xy_unprecision) != 0) 284 sc->last_y = ep.ep_y; 285 break; 286 case 2: 287 /* emulate z axis */ 288 ep.ep_z = psc->packet[2]; 289 aprint_debug_dev(psc->sc_dev, 290 "2 fingers detected in elantech mode:\n"); 291 aprint_debug_dev(psc->sc_dev, 292 " %02x %02x %02x %02x %02x %02x\n", 293 psc->packet[0], psc->packet[1], psc->packet[2], 294 psc->packet[3], psc->packet[4], psc->packet[5]); 295 296 s = spltty(); 297 wsmouse_input(psc->sc_wsmousedev, 0, 298 0, 0, 299 sc->initializing ? 300 0 : (sc->last_z - ep.ep_z) >> elantech_z_unprecision, 301 0, 302 WSMOUSE_INPUT_DELTA); 303 splx(s); 304 305 if (sc->initializing == true || 306 ((sc->last_z - ep.ep_z) >> elantech_z_unprecision) != 0) 307 sc->last_z = ep.ep_z; 308 break; 309 default: 310 aprint_debug_dev(psc->sc_dev, "that's a lot of fingers!\n"); 311 return; 312 } 313 314 if (ep.ep_nfingers > 0) 315 sc->initializing = false; 316 sc->last_nfingers = ep.ep_nfingers; 317 } 318 319 int 320 pms_elantech_probe_init(void *opaque) 321 { 322 struct pms_softc *psc = opaque; 323 struct elantech_softc *sc = &psc->u.elantech; 324 struct sysctllog *clog = NULL; 325 u_char cmd[1], resp[3]; 326 uint16_t fwversion; 327 int res; 328 329 pckbport_flush(psc->sc_kbctag, psc->sc_kbcslot); 330 331 cmd[0] = PMS_SET_SCALE11; 332 if ((res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, 333 cmd, 1, 0, NULL, 0)) != 0) 334 goto doreset; 335 cmd[0] = PMS_SET_SCALE11; 336 if ((res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, 337 cmd, 1, 0, NULL, 0)) != 0) 338 goto doreset; 339 cmd[0] = PMS_SET_SCALE11; 340 if ((res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, 341 cmd, 1, 0, NULL, 0)) != 0) 342 goto doreset; 343 344 cmd[0] = PMS_SEND_DEV_STATUS; 345 if ((res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, 346 cmd, 1, 3, resp, 0)) != 0) 347 goto doreset; 348 349 if (!ELANTECH_MAGIC(resp)) { 350 #ifdef ELANTECH_DEBUG 351 aprint_error_dev(psc->sc_dev, 352 "bad elantech magic (%X %X %X)\n", 353 resp[0], resp[1], resp[2]); 354 #endif 355 res = 1; 356 goto doreset; 357 } 358 359 res = pms_sliced_command(psc->sc_kbctag, psc->sc_kbcslot, 360 ELANTECH_FW_VERSION); 361 cmd[0] = PMS_SEND_DEV_STATUS; 362 res |= pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, 363 cmd, 1, 3, resp, 0); 364 if (res) { 365 aprint_error_dev(psc->sc_dev, 366 "unable to query elantech firmware version\n"); 367 goto doreset; 368 } 369 370 fwversion = (resp[0] << 8) | resp[2]; 371 if (fwversion < ELANTECH_MIN_VERSION) { 372 aprint_error_dev(psc->sc_dev, 373 "unsupported Elantech version %d.%d (%X %X %X)\n", 374 resp[0], resp[2], resp[0], resp[1], resp[2]); 375 goto doreset; 376 } 377 sc->version = (resp[0] << 16) | (resp[1] << 8) | resp[2]; 378 aprint_normal_dev(psc->sc_dev, "Elantech touchpad version %d.%d (%06x)\n", 379 resp[0], resp[2], sc->version); 380 381 res = pms_elantech_init(psc); 382 if (res) { 383 aprint_error_dev(psc->sc_dev, 384 "couldn't initialize elantech touchpad\n"); 385 goto doreset; 386 } 387 388 pms_sysctl_elantech(&clog); 389 pckbport_set_inputhandler(psc->sc_kbctag, psc->sc_kbcslot, 390 pms_elantech_input, psc, device_xname(psc->sc_dev)); 391 392 return 0; 393 394 doreset: 395 cmd[0] = PMS_RESET; 396 (void)pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd, 397 1, 2, resp, 1); 398 return res; 399 } 400 401 void 402 pms_elantech_enable(void *opaque) 403 { 404 struct pms_softc *psc = opaque; 405 struct elantech_softc *sc = &psc->u.elantech; 406 407 sc->initializing = true; 408 } 409 410 void 411 pms_elantech_resume(void *opaque) 412 { 413 struct pms_softc *psc = opaque; 414 uint8_t cmd, resp[2]; 415 int res; 416 417 cmd = PMS_RESET; 418 res = pckbport_poll_cmd(psc->sc_kbctag, psc->sc_kbcslot, &cmd, 419 1, 2, resp, 1); 420 if (res) 421 aprint_error_dev(psc->sc_dev, 422 "elantech reset on resume failed\n"); 423 else { 424 pms_elantech_init(psc); 425 pms_elantech_enable(psc); 426 } 427 } 428
Indexes created Fri Oct 03 02:09:57 GMT 2025