alps.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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 0x04 34#define ALPS_4BTN 0x08 35#define ALPS_OLDPROTO 0x10 36#define ALPS_PASS 0x20 37 38static struct alps_model_info alps_model_data[] = { 39 { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO }, /* UMAX-530T */ 40 { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 }, 41 { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 }, 42 { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 }, 43 { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 }, 44 { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, 0 }, 45 { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */ 46 { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK }, /* NEC Versa L320 */ 47 { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 }, 48 { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS }, /* Dell Latitude D800 */ 49 { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 }, 50 { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, 0 }, 51 { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */ 52 { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, 53 { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */ 54}; 55 56/* 57 * XXX - this entry is suspicious. First byte has zero lower nibble, 58 * which is what a normal mouse would report. Also, the value 0x0e 59 * isn't valid per PS/2 spec. 60 */ 61 62/* 63 * ALPS abolute Mode - new format 64 * 65 * byte 0: 1 ? ? ? 1 ? ? ? 66 * byte 1: 0 x6 x5 x4 x3 x2 x1 x0 67 * byte 2: 0 x10 x9 x8 x7 ? fin ges 68 * byte 3: 0 y9 y8 y7 1 M R L 69 * byte 4: 0 y6 y5 y4 y3 y2 y1 y0 70 * byte 5: 0 z6 z5 z4 z3 z2 z1 z0 71 * 72 * ?'s can have different meanings on different models, 73 * such as wheel rotation, extra buttons, stick buttons 74 * on a dualpoint, etc. 75 */ 76 77static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs) 78{ 79 struct alps_data *priv = psmouse->private; 80 unsigned char *packet = psmouse->packet; 81 struct input_dev *dev = &psmouse->dev; 82 struct input_dev *dev2 = &priv->dev2; 83 int x, y, z, ges, fin, left, right, middle; 84 85 input_regs(dev, regs); 86 87 if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */ 88 input_report_key(dev2, BTN_LEFT, packet[0] & 1); 89 input_report_key(dev2, BTN_RIGHT, packet[0] & 2); 90 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4); 91 input_report_rel(dev2, REL_X, 92 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0); 93 input_report_rel(dev2, REL_Y, 94 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0); 95 input_sync(dev2); 96 return; 97 } 98 99 if (priv->i->flags & ALPS_OLDPROTO) { 100 left = packet[2] & 0x08; 101 right = packet[2] & 0x10; 102 middle = 0; 103 x = packet[1] | ((packet[0] & 0x07) << 7); 104 y = packet[4] | ((packet[3] & 0x07) << 7); 105 z = packet[5]; 106 } else { 107 left = packet[3] & 1; 108 right = packet[3] & 2; 109 middle = packet[3] & 4; 110 x = packet[1] | ((packet[2] & 0x78) << (7 - 3)); 111 y = packet[4] | ((packet[3] & 0x70) << (7 - 4)); 112 z = packet[5]; 113 } 114 115 ges = packet[2] & 1; 116 fin = packet[2] & 2; 117 118 input_report_key(dev, BTN_LEFT, left); 119 input_report_key(dev, BTN_RIGHT, right); 120 input_report_key(dev, BTN_MIDDLE, middle); 121 122 if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) { 123 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x)); 124 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y)); 125 input_sync(dev); 126 input_sync(dev2); 127 return; 128 } 129 130 /* Convert hardware tap to a reasonable Z value */ 131 if (ges && !fin) z = 40; 132 133 /* 134 * A "tap and drag" operation is reported by the hardware as a transition 135 * from (!fin && ges) to (fin && ges). This should be translated to the 136 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually. 137 */ 138 if (ges && fin && !priv->prev_fin) { 139 input_report_abs(dev, ABS_X, x); 140 input_report_abs(dev, ABS_Y, y); 141 input_report_abs(dev, ABS_PRESSURE, 0); 142 input_report_key(dev, BTN_TOOL_FINGER, 0); 143 input_sync(dev); 144 } 145 priv->prev_fin = fin; 146 147 if (z > 30) input_report_key(dev, BTN_TOUCH, 1); 148 if (z < 25) input_report_key(dev, BTN_TOUCH, 0); 149 150 if (z > 0) { 151 input_report_abs(dev, ABS_X, x); 152 input_report_abs(dev, ABS_Y, y); 153 } 154 155 input_report_abs(dev, ABS_PRESSURE, z); 156 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 157 158 159 if (priv->i->flags & ALPS_WHEEL) 160 input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08)); 161 162 if (priv->i->flags & ALPS_FW_BK) { 163 input_report_key(dev, BTN_FORWARD, packet[0] & 0x10); 164 input_report_key(dev, BTN_BACK, packet[2] & 0x04); 165 } 166 167 input_sync(dev); 168} 169 170static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs) 171{ 172 struct alps_data *priv = psmouse->private; 173 174 if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */ 175 if (psmouse->pktcnt == 3) { 176 alps_process_packet(psmouse, regs); 177 return PSMOUSE_FULL_PACKET; 178 } 179 return PSMOUSE_GOOD_DATA; 180 } 181 182 if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0) 183 return PSMOUSE_BAD_DATA; 184 185 /* Bytes 2 - 6 should have 0 in the highest bit */ 186 if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 && 187 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) 188 return PSMOUSE_BAD_DATA; 189 190 if (psmouse->pktcnt == 6) { 191 alps_process_packet(psmouse, regs); 192 return PSMOUSE_FULL_PACKET; 193 } 194 195 return PSMOUSE_GOOD_DATA; 196} 197 198static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version) 199{ 200 struct ps2dev *ps2dev = &psmouse->ps2dev; 201 unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 }; 202 unsigned char param[4]; 203 int i; 204 205 /* 206 * First try "E6 report". 207 * ALPS should return 0,0,10 or 0,0,100 208 */ 209 param[0] = 0; 210 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) || 211 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 212 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 213 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 214 return NULL; 215 216 param[0] = param[1] = param[2] = 0xff; 217 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 218 return NULL; 219 220 dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]); 221 222 if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100)) 223 return NULL; 224 225 /* 226 * Now try "E7 report". Allowed responses are in 227 * alps_model_data[].signature 228 */ 229 param[0] = 0; 230 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) || 231 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 232 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 233 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21)) 234 return NULL; 235 236 param[0] = param[1] = param[2] = 0xff; 237 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 238 return NULL; 239 240 dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]); 241 242 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++); 243 *version = (param[0] << 8) | (param[1] << 4) | i; 244 245 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) 246 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature))) 247 return alps_model_data + i; 248 249 return NULL; 250} 251 252/* 253 * For DualPoint devices select the device that should respond to 254 * subsequent commands. It looks like glidepad is behind stickpointer, 255 * I'd thought it would be other way around... 256 */ 257static int alps_passthrough_mode(struct psmouse *psmouse, int enable) 258{ 259 struct ps2dev *ps2dev = &psmouse->ps2dev; 260 unsigned char param[3]; 261 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11; 262 263 if (ps2_command(ps2dev, NULL, cmd) || 264 ps2_command(ps2dev, NULL, cmd) || 265 ps2_command(ps2dev, NULL, cmd) || 266 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 267 return -1; 268 269 /* we may get 3 more bytes, just ignore them */ 270 ps2_command(ps2dev, param, 0x0300); 271 272 return 0; 273} 274 275static int alps_absolute_mode(struct psmouse *psmouse) 276{ 277 struct ps2dev *ps2dev = &psmouse->ps2dev; 278 279 /* Try ALPS magic knock - 4 disable before enable */ 280 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 281 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 282 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 283 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 284 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 285 return -1; 286 287 /* 288 * Switch mouse to poll (remote) mode so motion data will not 289 * get in our way 290 */ 291 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL); 292} 293 294static int alps_get_status(struct psmouse *psmouse, char *param) 295{ 296 struct ps2dev *ps2dev = &psmouse->ps2dev; 297 298 /* Get status: 0xF5 0xF5 0xF5 0xE9 */ 299 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 300 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 301 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 302 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 303 return -1; 304 305 dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]); 306 307 return 0; 308} 309 310/* 311 * Turn touchpad tapping on or off. The sequences are: 312 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable, 313 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable. 314 * My guess that 0xE9 (GetInfo) is here as a sync point. 315 * For models that also have stickpointer (DualPoints) its tapping 316 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but 317 * we don't fiddle with it. 318 */ 319static int alps_tap_mode(struct psmouse *psmouse, int enable) 320{ 321 struct ps2dev *ps2dev = &psmouse->ps2dev; 322 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES; 323 unsigned char tap_arg = enable ? 0x0A : 0x00; 324 unsigned char param[4]; 325 326 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) || 327 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 328 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 329 ps2_command(ps2dev, &tap_arg, cmd)) 330 return -1; 331 332 if (alps_get_status(psmouse, param)) 333 return -1; 334 335 return 0; 336} 337 338static int alps_reconnect(struct psmouse *psmouse) 339{ 340 struct alps_data *priv = psmouse->private; 341 unsigned char param[4]; 342 int version; 343 344 if (!(priv->i = alps_get_model(psmouse, &version))) 345 return -1; 346 347 if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1)) 348 return -1; 349 350 if (alps_get_status(psmouse, param)) 351 return -1; 352 353 if (param[0] & 0x04) 354 alps_tap_mode(psmouse, 1); 355 356 if (alps_absolute_mode(psmouse)) { 357 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n"); 358 return -1; 359 } 360 361 if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0)) 362 return -1; 363 364 return 0; 365} 366 367static void alps_disconnect(struct psmouse *psmouse) 368{ 369 struct alps_data *priv = psmouse->private; 370 psmouse_reset(psmouse); 371 input_unregister_device(&priv->dev2); 372 kfree(priv); 373} 374 375int alps_init(struct psmouse *psmouse) 376{ 377 struct alps_data *priv; 378 unsigned char param[4]; 379 int version; 380 381 psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL); 382 if (!priv) 383 goto init_fail; 384 memset(priv, 0, sizeof(struct alps_data)); 385 386 if (!(priv->i = alps_get_model(psmouse, &version))) 387 goto init_fail; 388 389 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1)) 390 goto init_fail; 391 392 if (alps_get_status(psmouse, param)) { 393 printk(KERN_ERR "alps.c: touchpad status report request failed\n"); 394 goto init_fail; 395 } 396 397 if (param[0] & 0x04) { 398 printk(KERN_INFO " Enabling hardware tapping\n"); 399 if (alps_tap_mode(psmouse, 1)) 400 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n"); 401 } 402 403 if (alps_absolute_mode(psmouse)) { 404 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n"); 405 goto init_fail; 406 } 407 408 if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0)) 409 goto init_fail; 410 411 psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY); 412 psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH); 413 psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER); 414 psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 415 416 psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS); 417 input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0); 418 input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0); 419 input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0); 420 421 if (priv->i->flags & ALPS_WHEEL) { 422 psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL); 423 psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL); 424 } 425 426 if (priv->i->flags & ALPS_FW_BK) { 427 psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD); 428 psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK); 429 } 430 431 sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys); 432 priv->dev2.phys = priv->phys; 433 priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse"; 434 priv->dev2.id.bustype = BUS_I8042; 435 priv->dev2.id.vendor = 0x0002; 436 priv->dev2.id.product = PSMOUSE_ALPS; 437 priv->dev2.id.version = 0x0000; 438 439 priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 440 priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y); 441 priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 442 443 input_register_device(&priv->dev2); 444 445 printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys); 446 447 psmouse->protocol_handler = alps_process_byte; 448 psmouse->disconnect = alps_disconnect; 449 psmouse->reconnect = alps_reconnect; 450 psmouse->pktsize = 6; 451 452 return 0; 453 454init_fail: 455 kfree(priv); 456 return -1; 457} 458 459int alps_detect(struct psmouse *psmouse, int set_properties) 460{ 461 int version; 462 struct alps_model_info *model; 463 464 if (!(model = alps_get_model(psmouse, &version))) 465 return -1; 466 467 if (set_properties) { 468 psmouse->vendor = "ALPS"; 469 if (model->flags & ALPS_DUALPOINT) 470 psmouse->name = "DualPoint TouchPad"; 471 else 472 psmouse->name = "GlidePoint"; 473 psmouse->model = version; 474 } 475 return 0; 476} 477 478