1 /* 2 * ALPS touchpad PS/2 mouse driver 3 * 4 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au> 5 * Copyright (c) 2003 Peter Osterlund <petero2@telia.com> 6 * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru> 7 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz> 8 * 9 * ALPS detection, tap switching and status querying info is taken from 10 * tpconfig utility (by C. Scott Ananian and Bruce Kall). 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License version 2 as published by 14 * the Free Software Foundation. 15 */ 16 17 #include <linux/input.h> 18 #include <linux/serio.h> 19 #include <linux/libps2.h> 20 21 #include "psmouse.h" 22 #include "alps.h" 23 24 #undef DEBUG 25 #ifdef DEBUG 26 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg) 27 #else 28 #define dbg(format, arg...) do {} while (0) 29 #endif 30 31 #define ALPS_DUALPOINT 0x01 32 #define ALPS_WHEEL 0x02 33 #define ALPS_FW_BK_1 0x04 34 #define ALPS_4BTN 0x08 35 #define ALPS_OLDPROTO 0x10 36 #define ALPS_PASS 0x20 37 #define ALPS_FW_BK_2 0x40 38 39 static struct alps_model_info alps_model_data[] = { 40 { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */ 41 { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 }, 42 { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 }, 43 { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 }, 44 { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 }, 45 { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, 0 }, 46 { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */ 47 { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */ 48 { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 }, 49 { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS }, /* Dell Latitude D800 */ 50 { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 }, 51 { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */ 52 { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */ 53 { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, 54 { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */ 55 }; 56 57 /* 58 * XXX - this entry is suspicious. First byte has zero lower nibble, 59 * which is what a normal mouse would report. Also, the value 0x0e 60 * isn't valid per PS/2 spec. 61 */ 62 63 /* 64 * ALPS abolute Mode - new format 65 * 66 * byte 0: 1 ? ? ? 1 ? ? ? 67 * byte 1: 0 x6 x5 x4 x3 x2 x1 x0 68 * byte 2: 0 x10 x9 x8 x7 ? fin ges 69 * byte 3: 0 y9 y8 y7 1 M R L 70 * byte 4: 0 y6 y5 y4 y3 y2 y1 y0 71 * byte 5: 0 z6 z5 z4 z3 z2 z1 z0 72 * 73 * ?'s can have different meanings on different models, 74 * such as wheel rotation, extra buttons, stick buttons 75 * on a dualpoint, etc. 76 */ 77 78 static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs) 79 { 80 struct alps_data *priv = psmouse->private; 81 unsigned char *packet = psmouse->packet; 82 struct input_dev *dev = &psmouse->dev; 83 struct input_dev *dev2 = &priv->dev2; 84 int x, y, z, ges, fin, left, right, middle; 85 int back = 0, forward = 0; 86 87 input_regs(dev, regs); 88 89 if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */ 90 input_report_key(dev2, BTN_LEFT, packet[0] & 1); 91 input_report_key(dev2, BTN_RIGHT, packet[0] & 2); 92 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4); 93 input_report_rel(dev2, REL_X, 94 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0); 95 input_report_rel(dev2, REL_Y, 96 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0); 97 input_sync(dev2); 98 return; 99 } 100 101 if (priv->i->flags & ALPS_OLDPROTO) { 102 left = packet[2] & 0x08; 103 right = packet[2] & 0x10; 104 middle = 0; 105 x = packet[1] | ((packet[0] & 0x07) << 7); 106 y = packet[4] | ((packet[3] & 0x07) << 7); 107 z = packet[5]; 108 } else { 109 left = packet[3] & 1; 110 right = packet[3] & 2; 111 middle = packet[3] & 4; 112 x = packet[1] | ((packet[2] & 0x78) << (7 - 3)); 113 y = packet[4] | ((packet[3] & 0x70) << (7 - 4)); 114 z = packet[5]; 115 } 116 117 if (priv->i->flags & ALPS_FW_BK_1) { 118 back = packet[2] & 4; 119 forward = packet[0] & 0x10; 120 } 121 122 if (priv->i->flags & ALPS_FW_BK_2) { 123 back = packet[3] & 4; 124 forward = packet[2] & 4; 125 if ((middle = forward && back)) 126 forward = back = 0; 127 } 128 129 ges = packet[2] & 1; 130 fin = packet[2] & 2; 131 132 input_report_key(dev, BTN_LEFT, left); 133 input_report_key(dev, BTN_RIGHT, right); 134 input_report_key(dev, BTN_MIDDLE, middle); 135 136 if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) { 137 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x)); 138 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y)); 139 input_sync(dev); 140 input_sync(dev2); 141 return; 142 } 143 144 /* Convert hardware tap to a reasonable Z value */ 145 if (ges && !fin) z = 40; 146 147 /* 148 * A "tap and drag" operation is reported by the hardware as a transition 149 * from (!fin && ges) to (fin && ges). This should be translated to the 150 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually. 151 */ 152 if (ges && fin && !priv->prev_fin) { 153 input_report_abs(dev, ABS_X, x); 154 input_report_abs(dev, ABS_Y, y); 155 input_report_abs(dev, ABS_PRESSURE, 0); 156 input_report_key(dev, BTN_TOOL_FINGER, 0); 157 input_sync(dev); 158 } 159 priv->prev_fin = fin; 160 161 if (z > 30) input_report_key(dev, BTN_TOUCH, 1); 162 if (z < 25) input_report_key(dev, BTN_TOUCH, 0); 163 164 if (z > 0) { 165 input_report_abs(dev, ABS_X, x); 166 input_report_abs(dev, ABS_Y, y); 167 } 168 169 input_report_abs(dev, ABS_PRESSURE, z); 170 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 171 172 if (priv->i->flags & ALPS_WHEEL) 173 input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08)); 174 175 if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 176 input_report_key(dev, BTN_FORWARD, forward); 177 input_report_key(dev, BTN_BACK, back); 178 } 179 180 input_sync(dev); 181 } 182 183 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs) 184 { 185 struct alps_data *priv = psmouse->private; 186 187 if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */ 188 if (psmouse->pktcnt == 3) { 189 alps_process_packet(psmouse, regs); 190 return PSMOUSE_FULL_PACKET; 191 } 192 return PSMOUSE_GOOD_DATA; 193 } 194 195 if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0) 196 return PSMOUSE_BAD_DATA; 197 198 /* Bytes 2 - 6 should have 0 in the highest bit */ 199 if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 && 200 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) 201 return PSMOUSE_BAD_DATA; 202 203 if (psmouse->pktcnt == 6) { 204 alps_process_packet(psmouse, regs); 205 return PSMOUSE_FULL_PACKET; 206 } 207 208 return PSMOUSE_GOOD_DATA; 209 } 210 211 static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version) 212 { 213 struct ps2dev *ps2dev = &psmouse->ps2dev; 214 unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 }; 215 unsigned char param[4]; 216 int i; 217 218 /* 219 * First try "E6 report". 220 * ALPS should return 0,0,10 or 0,0,100 221 */ 222 param[0] = 0; 223 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) || 224 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 225 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 226 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 227 return NULL; 228 229 param[0] = param[1] = param[2] = 0xff; 230 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 231 return NULL; 232 233 dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]); 234 235 if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100)) 236 return NULL; 237 238 /* 239 * Now try "E7 report". Allowed responses are in 240 * alps_model_data[].signature 241 */ 242 param[0] = 0; 243 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) || 244 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 245 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 246 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21)) 247 return NULL; 248 249 param[0] = param[1] = param[2] = 0xff; 250 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 251 return NULL; 252 253 dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]); 254 255 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++); 256 *version = (param[0] << 8) | (param[1] << 4) | i; 257 258 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) 259 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature))) 260 return alps_model_data + i; 261 262 return NULL; 263 } 264 265 /* 266 * For DualPoint devices select the device that should respond to 267 * subsequent commands. It looks like glidepad is behind stickpointer, 268 * I'd thought it would be other way around... 269 */ 270 static int alps_passthrough_mode(struct psmouse *psmouse, int enable) 271 { 272 struct ps2dev *ps2dev = &psmouse->ps2dev; 273 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11; 274 275 if (ps2_command(ps2dev, NULL, cmd) || 276 ps2_command(ps2dev, NULL, cmd) || 277 ps2_command(ps2dev, NULL, cmd) || 278 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 279 return -1; 280 281 /* we may get 3 more bytes, just ignore them */ 282 ps2_drain(ps2dev, 3, 100); 283 284 return 0; 285 } 286 287 static int alps_absolute_mode(struct psmouse *psmouse) 288 { 289 struct ps2dev *ps2dev = &psmouse->ps2dev; 290 291 /* Try ALPS magic knock - 4 disable before enable */ 292 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 293 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 294 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 295 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 296 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 297 return -1; 298 299 /* 300 * Switch mouse to poll (remote) mode so motion data will not 301 * get in our way 302 */ 303 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL); 304 } 305 306 static int alps_get_status(struct psmouse *psmouse, char *param) 307 { 308 struct ps2dev *ps2dev = &psmouse->ps2dev; 309 310 /* Get status: 0xF5 0xF5 0xF5 0xE9 */ 311 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 312 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 313 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 314 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 315 return -1; 316 317 dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]); 318 319 return 0; 320 } 321 322 /* 323 * Turn touchpad tapping on or off. The sequences are: 324 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable, 325 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable. 326 * My guess that 0xE9 (GetInfo) is here as a sync point. 327 * For models that also have stickpointer (DualPoints) its tapping 328 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but 329 * we don't fiddle with it. 330 */ 331 static int alps_tap_mode(struct psmouse *psmouse, int enable) 332 { 333 struct ps2dev *ps2dev = &psmouse->ps2dev; 334 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES; 335 unsigned char tap_arg = enable ? 0x0A : 0x00; 336 unsigned char param[4]; 337 338 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) || 339 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 340 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 341 ps2_command(ps2dev, &tap_arg, cmd)) 342 return -1; 343 344 if (alps_get_status(psmouse, param)) 345 return -1; 346 347 return 0; 348 } 349 350 static int alps_reconnect(struct psmouse *psmouse) 351 { 352 struct alps_data *priv = psmouse->private; 353 unsigned char param[4]; 354 int version; 355 356 psmouse_reset(psmouse); 357 358 if (!(priv->i = alps_get_model(psmouse, &version))) 359 return -1; 360 361 if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1)) 362 return -1; 363 364 if (alps_get_status(psmouse, param)) 365 return -1; 366 367 if (!(param[0] & 0x04)) 368 alps_tap_mode(psmouse, 1); 369 370 if (alps_absolute_mode(psmouse)) { 371 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n"); 372 return -1; 373 } 374 375 if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0)) 376 return -1; 377 378 return 0; 379 } 380 381 static void alps_disconnect(struct psmouse *psmouse) 382 { 383 struct alps_data *priv = psmouse->private; 384 psmouse_reset(psmouse); 385 input_unregister_device(&priv->dev2); 386 kfree(priv); 387 } 388 389 int alps_init(struct psmouse *psmouse) 390 { 391 struct alps_data *priv; 392 unsigned char param[4]; 393 int version; 394 395 psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL); 396 if (!priv) 397 goto init_fail; 398 memset(priv, 0, sizeof(struct alps_data)); 399 400 if (!(priv->i = alps_get_model(psmouse, &version))) 401 goto init_fail; 402 403 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1)) 404 goto init_fail; 405 406 if (alps_get_status(psmouse, param)) { 407 printk(KERN_ERR "alps.c: touchpad status report request failed\n"); 408 goto init_fail; 409 } 410 411 if (param[0] & 0x04) { 412 printk(KERN_INFO "alps.c: Enabling hardware tapping\n"); 413 if (alps_tap_mode(psmouse, 1)) 414 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n"); 415 } 416 417 if (alps_absolute_mode(psmouse)) { 418 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n"); 419 goto init_fail; 420 } 421 422 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0)) 423 goto init_fail; 424 425 psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY); 426 psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH); 427 psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER); 428 psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 429 430 psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS); 431 input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0); 432 input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0); 433 input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0); 434 435 if (priv->i->flags & ALPS_WHEEL) { 436 psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL); 437 psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL); 438 } 439 440 if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 441 psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD); 442 psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK); 443 } 444 445 sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys); 446 priv->dev2.phys = priv->phys; 447 priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse"; 448 priv->dev2.id.bustype = BUS_I8042; 449 priv->dev2.id.vendor = 0x0002; 450 priv->dev2.id.product = PSMOUSE_ALPS; 451 priv->dev2.id.version = 0x0000; 452 453 priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 454 priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y); 455 priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 456 457 input_register_device(&priv->dev2); 458 459 printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys); 460 461 psmouse->protocol_handler = alps_process_byte; 462 psmouse->disconnect = alps_disconnect; 463 psmouse->reconnect = alps_reconnect; 464 psmouse->pktsize = 6; 465 466 return 0; 467 468 init_fail: 469 kfree(priv); 470 return -1; 471 } 472 473 int alps_detect(struct psmouse *psmouse, int set_properties) 474 { 475 int version; 476 struct alps_model_info *model; 477 478 if (!(model = alps_get_model(psmouse, &version))) 479 return -1; 480 481 if (set_properties) { 482 psmouse->vendor = "ALPS"; 483 psmouse->name = model->flags & ALPS_DUALPOINT ? 484 "DualPoint TouchPad" : "GlidePoint"; 485 psmouse->model = version; 486 } 487 return 0; 488 } 489 490