1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Cypress Trackpad PS/2 mouse driver 4 * 5 * Copyright (c) 2012 Cypress Semiconductor Corporation. 6 * 7 * Author: 8 * Dudley Du <dudl@cypress.com> 9 * 10 * Additional contributors include: 11 * Kamal Mostafa <kamal@canonical.com> 12 * Kyle Fazzari <git@status.e4ward.com> 13 */ 14 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/serio.h> 19 #include <linux/libps2.h> 20 #include <linux/input.h> 21 #include <linux/input/mt.h> 22 #include <linux/sched.h> 23 #include <linux/wait.h> 24 25 #include "cypress_ps2.h" 26 27 #undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */ 28 29 static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n) 30 { 31 struct cytp_data *cytp = psmouse->private; 32 cytp->pkt_size = n; 33 } 34 35 static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200}; 36 static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03}; 37 38 static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value) 39 { 40 struct ps2dev *ps2dev = &psmouse->ps2dev; 41 42 if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) { 43 psmouse_dbg(psmouse, 44 "sending command 0x%02x failed, resp 0x%02x\n", 45 value & 0xff, ps2dev->nak); 46 if (ps2dev->nak == CYTP_PS2_RETRY) 47 return CYTP_PS2_RETRY; 48 else 49 return CYTP_PS2_ERROR; 50 } 51 52 #ifdef CYTP_DEBUG_VERBOSE 53 psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n", 54 value & 0xff); 55 #endif 56 57 return 0; 58 } 59 60 static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd, 61 unsigned char data) 62 { 63 struct ps2dev *ps2dev = &psmouse->ps2dev; 64 int tries = CYTP_PS2_CMD_TRIES; 65 int rc; 66 67 ps2_begin_command(ps2dev); 68 69 do { 70 /* 71 * Send extension command byte (0xE8 or 0xF3). 72 * If sending the command fails, send recovery command 73 * to make the device return to the ready state. 74 */ 75 rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff); 76 if (rc == CYTP_PS2_RETRY) { 77 rc = cypress_ps2_sendbyte(psmouse, 0x00); 78 if (rc == CYTP_PS2_RETRY) 79 rc = cypress_ps2_sendbyte(psmouse, 0x0a); 80 } 81 if (rc == CYTP_PS2_ERROR) 82 continue; 83 84 rc = cypress_ps2_sendbyte(psmouse, data); 85 if (rc == CYTP_PS2_RETRY) 86 rc = cypress_ps2_sendbyte(psmouse, data); 87 if (rc == CYTP_PS2_ERROR) 88 continue; 89 else 90 break; 91 } while (--tries > 0); 92 93 ps2_end_command(ps2dev); 94 95 return rc; 96 } 97 98 static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, 99 unsigned char cmd, 100 unsigned char *param) 101 { 102 int rc; 103 struct ps2dev *ps2dev = &psmouse->ps2dev; 104 enum psmouse_state old_state; 105 int pktsize; 106 107 ps2_begin_command(ps2dev); 108 109 old_state = psmouse->state; 110 psmouse->state = PSMOUSE_CMD_MODE; 111 psmouse->pktcnt = 0; 112 113 pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3; 114 memset(param, 0, pktsize); 115 116 rc = cypress_ps2_sendbyte(psmouse, 0xe9); 117 if (rc < 0) 118 goto out; 119 120 wait_event_timeout(ps2dev->wait, 121 (psmouse->pktcnt >= pktsize), 122 msecs_to_jiffies(CYTP_CMD_TIMEOUT)); 123 124 memcpy(param, psmouse->packet, pktsize); 125 126 psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n", 127 cmd, pktsize, param); 128 129 out: 130 psmouse->state = old_state; 131 psmouse->pktcnt = 0; 132 133 ps2_end_command(ps2dev); 134 135 return rc; 136 } 137 138 static bool cypress_verify_cmd_state(struct psmouse *psmouse, 139 unsigned char cmd, unsigned char *param) 140 { 141 bool rate_match = false; 142 bool resolution_match = false; 143 int i; 144 145 /* callers will do further checking. */ 146 if (cmd == CYTP_CMD_READ_CYPRESS_ID || 147 cmd == CYTP_CMD_STANDARD_MODE || 148 cmd == CYTP_CMD_READ_TP_METRICS) 149 return true; 150 151 if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID && 152 (param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) { 153 for (i = 0; i < sizeof(cytp_resolution); i++) 154 if (cytp_resolution[i] == param[1]) 155 resolution_match = true; 156 157 for (i = 0; i < sizeof(cytp_rate); i++) 158 if (cytp_rate[i] == param[2]) 159 rate_match = true; 160 161 if (resolution_match && rate_match) 162 return true; 163 } 164 165 psmouse_dbg(psmouse, "verify cmd state failed.\n"); 166 return false; 167 } 168 169 static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd, 170 unsigned char *param) 171 { 172 int tries = CYTP_PS2_CMD_TRIES; 173 int rc; 174 175 psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n", 176 cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd), 177 DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd)); 178 179 do { 180 cypress_ps2_ext_cmd(psmouse, 181 PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd)); 182 cypress_ps2_ext_cmd(psmouse, 183 PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd)); 184 cypress_ps2_ext_cmd(psmouse, 185 PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd)); 186 cypress_ps2_ext_cmd(psmouse, 187 PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd)); 188 189 rc = cypress_ps2_read_cmd_status(psmouse, cmd, param); 190 if (rc) 191 continue; 192 193 if (cypress_verify_cmd_state(psmouse, cmd, param)) 194 return 0; 195 196 } while (--tries > 0); 197 198 return -EIO; 199 } 200 201 int cypress_detect(struct psmouse *psmouse, bool set_properties) 202 { 203 unsigned char param[3]; 204 205 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) 206 return -ENODEV; 207 208 /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ 209 if (param[0] != 0x33 || param[1] != 0xCC) 210 return -ENODEV; 211 212 if (set_properties) { 213 psmouse->vendor = "Cypress"; 214 psmouse->name = "Trackpad"; 215 } 216 217 return 0; 218 } 219 220 static int cypress_read_fw_version(struct psmouse *psmouse) 221 { 222 struct cytp_data *cytp = psmouse->private; 223 unsigned char param[3]; 224 225 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) 226 return -ENODEV; 227 228 /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ 229 if (param[0] != 0x33 || param[1] != 0xCC) 230 return -ENODEV; 231 232 cytp->fw_version = param[2] & FW_VERSION_MASX; 233 cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0; 234 235 /* 236 * Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to 237 * CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594. 238 */ 239 if (cytp->fw_version >= 11) 240 cytp->tp_metrics_supported = 0; 241 242 psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version); 243 psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n", 244 cytp->tp_metrics_supported); 245 246 return 0; 247 } 248 249 static int cypress_read_tp_metrics(struct psmouse *psmouse) 250 { 251 struct cytp_data *cytp = psmouse->private; 252 unsigned char param[8]; 253 254 /* set default values for tp metrics. */ 255 cytp->tp_width = CYTP_DEFAULT_WIDTH; 256 cytp->tp_high = CYTP_DEFAULT_HIGH; 257 cytp->tp_max_abs_x = CYTP_ABS_MAX_X; 258 cytp->tp_max_abs_y = CYTP_ABS_MAX_Y; 259 cytp->tp_min_pressure = CYTP_MIN_PRESSURE; 260 cytp->tp_max_pressure = CYTP_MAX_PRESSURE; 261 cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; 262 cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; 263 264 if (!cytp->tp_metrics_supported) 265 return 0; 266 267 memset(param, 0, sizeof(param)); 268 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) { 269 /* Update trackpad parameters. */ 270 cytp->tp_max_abs_x = (param[1] << 8) | param[0]; 271 cytp->tp_max_abs_y = (param[3] << 8) | param[2]; 272 cytp->tp_min_pressure = param[4]; 273 cytp->tp_max_pressure = param[5]; 274 } 275 276 if (!cytp->tp_max_pressure || 277 cytp->tp_max_pressure < cytp->tp_min_pressure || 278 !cytp->tp_width || !cytp->tp_high || 279 !cytp->tp_max_abs_x || 280 cytp->tp_max_abs_x < cytp->tp_width || 281 !cytp->tp_max_abs_y || 282 cytp->tp_max_abs_y < cytp->tp_high) 283 return -EINVAL; 284 285 cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; 286 cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; 287 288 #ifdef CYTP_DEBUG_VERBOSE 289 psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n"); 290 psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width); 291 psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high); 292 psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x); 293 psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y); 294 psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure); 295 psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure); 296 psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x); 297 psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y); 298 299 psmouse_dbg(psmouse, "tp_type_APA = %d\n", 300 (param[6] & TP_METRICS_BIT_APA) ? 1 : 0); 301 psmouse_dbg(psmouse, "tp_type_MTG = %d\n", 302 (param[6] & TP_METRICS_BIT_MTG) ? 1 : 0); 303 psmouse_dbg(psmouse, "tp_palm = %d\n", 304 (param[6] & TP_METRICS_BIT_PALM) ? 1 : 0); 305 psmouse_dbg(psmouse, "tp_stubborn = %d\n", 306 (param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0); 307 psmouse_dbg(psmouse, "tp_1f_jitter = %d\n", 308 (param[6] & TP_METRICS_BIT_1F_JITTER) >> 2); 309 psmouse_dbg(psmouse, "tp_2f_jitter = %d\n", 310 (param[6] & TP_METRICS_BIT_2F_JITTER) >> 4); 311 psmouse_dbg(psmouse, "tp_1f_spike = %d\n", 312 param[7] & TP_METRICS_BIT_1F_SPIKE); 313 psmouse_dbg(psmouse, "tp_2f_spike = %d\n", 314 (param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2); 315 psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n", 316 (param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4); 317 #endif 318 319 return 0; 320 } 321 322 static int cypress_query_hardware(struct psmouse *psmouse) 323 { 324 int ret; 325 326 ret = cypress_read_fw_version(psmouse); 327 if (ret) 328 return ret; 329 330 ret = cypress_read_tp_metrics(psmouse); 331 if (ret) 332 return ret; 333 334 return 0; 335 } 336 337 static int cypress_set_absolute_mode(struct psmouse *psmouse) 338 { 339 struct cytp_data *cytp = psmouse->private; 340 unsigned char param[3]; 341 342 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0) 343 return -1; 344 345 cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) 346 | CYTP_BIT_ABS_PRESSURE; 347 cypress_set_packet_size(psmouse, 5); 348 349 return 0; 350 } 351 352 /* 353 * Reset trackpad device. 354 * This is also the default mode when trackpad powered on. 355 */ 356 static void cypress_reset(struct psmouse *psmouse) 357 { 358 struct cytp_data *cytp = psmouse->private; 359 360 cytp->mode = 0; 361 362 psmouse_reset(psmouse); 363 } 364 365 static int cypress_set_input_params(struct input_dev *input, 366 struct cytp_data *cytp) 367 { 368 int ret; 369 370 if (!cytp->tp_res_x || !cytp->tp_res_y) 371 return -EINVAL; 372 373 __set_bit(EV_ABS, input->evbit); 374 input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0); 375 input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0); 376 input_set_abs_params(input, ABS_PRESSURE, 377 cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0); 378 input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0); 379 380 /* finger position */ 381 input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0); 382 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0); 383 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0); 384 385 ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS, 386 INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK); 387 if (ret < 0) 388 return ret; 389 390 __set_bit(INPUT_PROP_SEMI_MT, input->propbit); 391 392 input_abs_set_res(input, ABS_X, cytp->tp_res_x); 393 input_abs_set_res(input, ABS_Y, cytp->tp_res_y); 394 395 input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x); 396 input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y); 397 398 __set_bit(BTN_TOUCH, input->keybit); 399 __set_bit(BTN_TOOL_FINGER, input->keybit); 400 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); 401 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); 402 __set_bit(BTN_TOOL_QUADTAP, input->keybit); 403 __set_bit(BTN_TOOL_QUINTTAP, input->keybit); 404 405 __clear_bit(EV_REL, input->evbit); 406 __clear_bit(REL_X, input->relbit); 407 __clear_bit(REL_Y, input->relbit); 408 409 __set_bit(EV_KEY, input->evbit); 410 __set_bit(BTN_LEFT, input->keybit); 411 __set_bit(BTN_RIGHT, input->keybit); 412 __set_bit(BTN_MIDDLE, input->keybit); 413 414 return 0; 415 } 416 417 static int cypress_get_finger_count(unsigned char header_byte) 418 { 419 unsigned char bits6_7; 420 int finger_count; 421 422 bits6_7 = header_byte >> 6; 423 finger_count = bits6_7 & 0x03; 424 425 if (finger_count == 1) 426 return 1; 427 428 if (header_byte & ABS_HSCROLL_BIT) { 429 /* HSCROLL gets added on to 0 finger count. */ 430 switch (finger_count) { 431 case 0: return 4; 432 case 2: return 5; 433 default: 434 /* Invalid contact (e.g. palm). Ignore it. */ 435 return 0; 436 } 437 } 438 439 return finger_count; 440 } 441 442 443 static int cypress_parse_packet(struct psmouse *psmouse, 444 struct cytp_data *cytp, struct cytp_report_data *report_data) 445 { 446 unsigned char *packet = psmouse->packet; 447 unsigned char header_byte = packet[0]; 448 449 memset(report_data, 0, sizeof(struct cytp_report_data)); 450 451 report_data->contact_cnt = cypress_get_finger_count(header_byte); 452 report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0; 453 454 if (report_data->contact_cnt == 1) { 455 report_data->contacts[0].x = 456 ((packet[1] & 0x70) << 4) | packet[2]; 457 report_data->contacts[0].y = 458 ((packet[1] & 0x07) << 8) | packet[3]; 459 if (cytp->mode & CYTP_BIT_ABS_PRESSURE) 460 report_data->contacts[0].z = packet[4]; 461 462 } else if (report_data->contact_cnt >= 2) { 463 report_data->contacts[0].x = 464 ((packet[1] & 0x70) << 4) | packet[2]; 465 report_data->contacts[0].y = 466 ((packet[1] & 0x07) << 8) | packet[3]; 467 if (cytp->mode & CYTP_BIT_ABS_PRESSURE) 468 report_data->contacts[0].z = packet[4]; 469 470 report_data->contacts[1].x = 471 ((packet[5] & 0xf0) << 4) | packet[6]; 472 report_data->contacts[1].y = 473 ((packet[5] & 0x0f) << 8) | packet[7]; 474 if (cytp->mode & CYTP_BIT_ABS_PRESSURE) 475 report_data->contacts[1].z = report_data->contacts[0].z; 476 } 477 478 report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0; 479 report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0; 480 481 /* 482 * This is only true if one of the mouse buttons were tapped. Make 483 * sure it doesn't turn into a click. The regular tap-to-click 484 * functionality will handle that on its own. If we don't do this, 485 * disabling tap-to-click won't affect the mouse button zones. 486 */ 487 if (report_data->tap) 488 report_data->left = 0; 489 490 #ifdef CYTP_DEBUG_VERBOSE 491 { 492 int i; 493 int n = report_data->contact_cnt; 494 psmouse_dbg(psmouse, "Dump parsed report data as below:\n"); 495 psmouse_dbg(psmouse, "contact_cnt = %d\n", 496 report_data->contact_cnt); 497 if (n > CYTP_MAX_MT_SLOTS) 498 n = CYTP_MAX_MT_SLOTS; 499 for (i = 0; i < n; i++) 500 psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i, 501 report_data->contacts[i].x, 502 report_data->contacts[i].y, 503 report_data->contacts[i].z); 504 psmouse_dbg(psmouse, "left = %d\n", report_data->left); 505 psmouse_dbg(psmouse, "right = %d\n", report_data->right); 506 psmouse_dbg(psmouse, "middle = %d\n", report_data->middle); 507 } 508 #endif 509 510 return 0; 511 } 512 513 static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt) 514 { 515 int i; 516 struct input_dev *input = psmouse->dev; 517 struct cytp_data *cytp = psmouse->private; 518 struct cytp_report_data report_data; 519 struct cytp_contact *contact; 520 struct input_mt_pos pos[CYTP_MAX_MT_SLOTS]; 521 int slots[CYTP_MAX_MT_SLOTS]; 522 int n; 523 524 cypress_parse_packet(psmouse, cytp, &report_data); 525 526 n = report_data.contact_cnt; 527 if (n > CYTP_MAX_MT_SLOTS) 528 n = CYTP_MAX_MT_SLOTS; 529 530 for (i = 0; i < n; i++) { 531 contact = &report_data.contacts[i]; 532 pos[i].x = contact->x; 533 pos[i].y = contact->y; 534 } 535 536 input_mt_assign_slots(input, slots, pos, n, 0); 537 538 for (i = 0; i < n; i++) { 539 contact = &report_data.contacts[i]; 540 input_mt_slot(input, slots[i]); 541 input_mt_report_slot_state(input, MT_TOOL_FINGER, true); 542 input_report_abs(input, ABS_MT_POSITION_X, contact->x); 543 input_report_abs(input, ABS_MT_POSITION_Y, contact->y); 544 input_report_abs(input, ABS_MT_PRESSURE, contact->z); 545 } 546 547 input_mt_sync_frame(input); 548 549 input_mt_report_finger_count(input, report_data.contact_cnt); 550 551 input_report_key(input, BTN_LEFT, report_data.left); 552 input_report_key(input, BTN_RIGHT, report_data.right); 553 input_report_key(input, BTN_MIDDLE, report_data.middle); 554 555 input_sync(input); 556 } 557 558 static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse) 559 { 560 int contact_cnt; 561 int index = psmouse->pktcnt - 1; 562 unsigned char *packet = psmouse->packet; 563 struct cytp_data *cytp = psmouse->private; 564 565 if (index < 0 || index > cytp->pkt_size) 566 return PSMOUSE_BAD_DATA; 567 568 if (index == 0 && (packet[0] & 0xfc) == 0) { 569 /* call packet process for reporting finger leave. */ 570 cypress_process_packet(psmouse, 1); 571 return PSMOUSE_FULL_PACKET; 572 } 573 574 /* 575 * Perform validation (and adjust packet size) based only on the 576 * first byte; allow all further bytes through. 577 */ 578 if (index != 0) 579 return PSMOUSE_GOOD_DATA; 580 581 /* 582 * If absolute/relative mode bit has not been set yet, just pass 583 * the byte through. 584 */ 585 if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0) 586 return PSMOUSE_GOOD_DATA; 587 588 if ((packet[0] & 0x08) == 0x08) 589 return PSMOUSE_BAD_DATA; 590 591 contact_cnt = cypress_get_finger_count(packet[0]); 592 if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE) 593 cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4); 594 else 595 cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5); 596 597 return PSMOUSE_GOOD_DATA; 598 } 599 600 static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse) 601 { 602 struct cytp_data *cytp = psmouse->private; 603 604 if (psmouse->pktcnt >= cytp->pkt_size) { 605 cypress_process_packet(psmouse, 0); 606 return PSMOUSE_FULL_PACKET; 607 } 608 609 return cypress_validate_byte(psmouse); 610 } 611 612 static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate) 613 { 614 struct cytp_data *cytp = psmouse->private; 615 616 if (rate >= 80) { 617 psmouse->rate = 80; 618 cytp->mode |= CYTP_BIT_HIGH_RATE; 619 } else { 620 psmouse->rate = 40; 621 cytp->mode &= ~CYTP_BIT_HIGH_RATE; 622 } 623 624 ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate, 625 PSMOUSE_CMD_SETRATE); 626 } 627 628 static void cypress_disconnect(struct psmouse *psmouse) 629 { 630 cypress_reset(psmouse); 631 kfree(psmouse->private); 632 psmouse->private = NULL; 633 } 634 635 static int cypress_reconnect(struct psmouse *psmouse) 636 { 637 int tries = CYTP_PS2_CMD_TRIES; 638 int rc; 639 640 do { 641 cypress_reset(psmouse); 642 rc = cypress_detect(psmouse, false); 643 } while (rc && (--tries > 0)); 644 645 if (rc) { 646 psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n"); 647 return -1; 648 } 649 650 if (cypress_set_absolute_mode(psmouse)) { 651 psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n"); 652 return -1; 653 } 654 655 return 0; 656 } 657 658 int cypress_init(struct psmouse *psmouse) 659 { 660 struct cytp_data *cytp; 661 662 cytp = kzalloc(sizeof(struct cytp_data), GFP_KERNEL); 663 if (!cytp) 664 return -ENOMEM; 665 666 psmouse->private = cytp; 667 psmouse->pktsize = 8; 668 669 cypress_reset(psmouse); 670 671 if (cypress_query_hardware(psmouse)) { 672 psmouse_err(psmouse, "Unable to query Trackpad hardware.\n"); 673 goto err_exit; 674 } 675 676 if (cypress_set_absolute_mode(psmouse)) { 677 psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n"); 678 goto err_exit; 679 } 680 681 if (cypress_set_input_params(psmouse->dev, cytp) < 0) { 682 psmouse_err(psmouse, "init: Unable to set input params.\n"); 683 goto err_exit; 684 } 685 686 psmouse->model = 1; 687 psmouse->protocol_handler = cypress_protocol_handler; 688 psmouse->set_rate = cypress_set_rate; 689 psmouse->disconnect = cypress_disconnect; 690 psmouse->reconnect = cypress_reconnect; 691 psmouse->cleanup = cypress_reset; 692 psmouse->resync_time = 0; 693 694 return 0; 695 696 err_exit: 697 /* 698 * Reset Cypress Trackpad as a standard mouse. Then 699 * let psmouse driver communicating with it as default PS2 mouse. 700 */ 701 cypress_reset(psmouse); 702 703 psmouse->private = NULL; 704 kfree(cytp); 705 706 return -1; 707 } 708