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 u8 cytp_rate[] = {10, 20, 40, 60, 100, 200}; 36 static const u8 cytp_resolution[] = {0x00, 0x01, 0x02, 0x03}; 37 38 static int cypress_ps2_sendbyte(struct psmouse *psmouse, u8 cmd) 39 { 40 struct ps2dev *ps2dev = &psmouse->ps2dev; 41 int error; 42 43 error = ps2_sendbyte(ps2dev, cmd, CYTP_CMD_TIMEOUT); 44 if (error) { 45 psmouse_dbg(psmouse, 46 "sending command 0x%02x failed, resp 0x%02x, error %d\n", 47 cmd, ps2dev->nak, error); 48 return error; 49 } 50 51 #ifdef CYTP_DEBUG_VERBOSE 52 psmouse_dbg(psmouse, "sending command 0x%02x succeeded\n", cmd); 53 #endif 54 55 return 0; 56 } 57 58 static int cypress_ps2_ext_cmd(struct psmouse *psmouse, u8 prefix, u8 nibble) 59 { 60 struct ps2dev *ps2dev = &psmouse->ps2dev; 61 int tries = CYTP_PS2_CMD_TRIES; 62 int rc; 63 64 ps2_begin_command(ps2dev); 65 66 do { 67 /* 68 * Send extension command byte (0xE8 or 0xF3). 69 * If sending the command fails, send recovery command 70 * to make the device return to the ready state. 71 */ 72 rc = cypress_ps2_sendbyte(psmouse, prefix); 73 if (rc == -EAGAIN) { 74 rc = cypress_ps2_sendbyte(psmouse, 0x00); 75 if (rc == -EAGAIN) 76 rc = cypress_ps2_sendbyte(psmouse, 0x0a); 77 } 78 79 if (!rc) { 80 rc = cypress_ps2_sendbyte(psmouse, nibble); 81 if (rc == -EAGAIN) 82 rc = cypress_ps2_sendbyte(psmouse, nibble); 83 84 if (!rc) 85 break; 86 } 87 } while (--tries > 0); 88 89 ps2_end_command(ps2dev); 90 91 return rc; 92 } 93 94 static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, 95 u8 cmd, u8 *param) 96 { 97 struct ps2dev *ps2dev = &psmouse->ps2dev; 98 enum psmouse_state old_state; 99 int pktsize; 100 int rc; 101 102 ps2_begin_command(ps2dev); 103 104 old_state = psmouse->state; 105 psmouse->state = PSMOUSE_CMD_MODE; 106 psmouse->pktcnt = 0; 107 108 pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3; 109 memset(param, 0, pktsize); 110 111 rc = cypress_ps2_sendbyte(psmouse, PSMOUSE_CMD_GETINFO & 0xff); 112 if (rc) 113 goto out; 114 115 if (!wait_event_timeout(ps2dev->wait, 116 psmouse->pktcnt >= pktsize, 117 msecs_to_jiffies(CYTP_CMD_TIMEOUT))) { 118 rc = -ETIMEDOUT; 119 goto out; 120 } 121 122 memcpy(param, psmouse->packet, pktsize); 123 124 psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n", 125 cmd, pktsize, param); 126 127 out: 128 psmouse->state = old_state; 129 psmouse->pktcnt = 0; 130 131 ps2_end_command(ps2dev); 132 133 return rc; 134 } 135 136 static bool cypress_verify_cmd_state(struct psmouse *psmouse, u8 cmd, u8* param) 137 { 138 bool rate_match = false; 139 bool resolution_match = false; 140 int i; 141 142 /* callers will do further checking. */ 143 if (cmd == CYTP_CMD_READ_CYPRESS_ID || 144 cmd == CYTP_CMD_STANDARD_MODE || 145 cmd == CYTP_CMD_READ_TP_METRICS) 146 return true; 147 148 if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID && 149 (param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) { 150 for (i = 0; i < sizeof(cytp_resolution); i++) 151 if (cytp_resolution[i] == param[1]) 152 resolution_match = true; 153 154 for (i = 0; i < sizeof(cytp_rate); i++) 155 if (cytp_rate[i] == param[2]) 156 rate_match = true; 157 158 if (resolution_match && rate_match) 159 return true; 160 } 161 162 psmouse_dbg(psmouse, "verify cmd state failed.\n"); 163 return false; 164 } 165 166 static int cypress_send_ext_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 167 { 168 u8 cmd_prefix = PSMOUSE_CMD_SETRES & 0xff; 169 int tries = CYTP_PS2_CMD_TRIES; 170 int error; 171 172 psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n", 173 cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd), 174 DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd)); 175 176 do { 177 cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_DD(cmd)); 178 cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_CC(cmd)); 179 cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_BB(cmd)); 180 cypress_ps2_ext_cmd(psmouse, cmd_prefix, DECODE_CMD_AA(cmd)); 181 182 error = cypress_ps2_read_cmd_status(psmouse, cmd, param); 183 if (!error && cypress_verify_cmd_state(psmouse, cmd, param)) 184 return 0; 185 186 } while (--tries > 0); 187 188 return -EIO; 189 } 190 191 int cypress_detect(struct psmouse *psmouse, bool set_properties) 192 { 193 u8 param[3]; 194 195 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) 196 return -ENODEV; 197 198 /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ 199 if (param[0] != 0x33 || param[1] != 0xCC) 200 return -ENODEV; 201 202 if (set_properties) { 203 psmouse->vendor = "Cypress"; 204 psmouse->name = "Trackpad"; 205 } 206 207 return 0; 208 } 209 210 static int cypress_read_fw_version(struct psmouse *psmouse) 211 { 212 struct cytp_data *cytp = psmouse->private; 213 u8 param[3]; 214 215 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) 216 return -ENODEV; 217 218 /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ 219 if (param[0] != 0x33 || param[1] != 0xCC) 220 return -ENODEV; 221 222 cytp->fw_version = param[2] & FW_VERSION_MASX; 223 cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0; 224 225 /* 226 * Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to 227 * CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594. 228 */ 229 if (cytp->fw_version >= 11) 230 cytp->tp_metrics_supported = 0; 231 232 psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version); 233 psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n", 234 cytp->tp_metrics_supported); 235 236 return 0; 237 } 238 239 static int cypress_read_tp_metrics(struct psmouse *psmouse) 240 { 241 struct cytp_data *cytp = psmouse->private; 242 u8 param[8]; 243 244 /* set default values for tp metrics. */ 245 cytp->tp_width = CYTP_DEFAULT_WIDTH; 246 cytp->tp_high = CYTP_DEFAULT_HIGH; 247 cytp->tp_max_abs_x = CYTP_ABS_MAX_X; 248 cytp->tp_max_abs_y = CYTP_ABS_MAX_Y; 249 cytp->tp_min_pressure = CYTP_MIN_PRESSURE; 250 cytp->tp_max_pressure = CYTP_MAX_PRESSURE; 251 cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; 252 cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; 253 254 if (!cytp->tp_metrics_supported) 255 return 0; 256 257 memset(param, 0, sizeof(param)); 258 if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) { 259 /* Update trackpad parameters. */ 260 cytp->tp_max_abs_x = (param[1] << 8) | param[0]; 261 cytp->tp_max_abs_y = (param[3] << 8) | param[2]; 262 cytp->tp_min_pressure = param[4]; 263 cytp->tp_max_pressure = param[5]; 264 } 265 266 if (!cytp->tp_max_pressure || 267 cytp->tp_max_pressure < cytp->tp_min_pressure || 268 !cytp->tp_width || !cytp->tp_high || 269 !cytp->tp_max_abs_x || 270 cytp->tp_max_abs_x < cytp->tp_width || 271 !cytp->tp_max_abs_y || 272 cytp->tp_max_abs_y < cytp->tp_high) 273 return -EINVAL; 274 275 cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; 276 cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; 277 278 #ifdef CYTP_DEBUG_VERBOSE 279 psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n"); 280 psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width); 281 psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high); 282 psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x); 283 psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y); 284 psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure); 285 psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure); 286 psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x); 287 psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y); 288 289 psmouse_dbg(psmouse, "tp_type_APA = %d\n", 290 (param[6] & TP_METRICS_BIT_APA) ? 1 : 0); 291 psmouse_dbg(psmouse, "tp_type_MTG = %d\n", 292 (param[6] & TP_METRICS_BIT_MTG) ? 1 : 0); 293 psmouse_dbg(psmouse, "tp_palm = %d\n", 294 (param[6] & TP_METRICS_BIT_PALM) ? 1 : 0); 295 psmouse_dbg(psmouse, "tp_stubborn = %d\n", 296 (param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0); 297 psmouse_dbg(psmouse, "tp_1f_jitter = %d\n", 298 (param[6] & TP_METRICS_BIT_1F_JITTER) >> 2); 299 psmouse_dbg(psmouse, "tp_2f_jitter = %d\n", 300 (param[6] & TP_METRICS_BIT_2F_JITTER) >> 4); 301 psmouse_dbg(psmouse, "tp_1f_spike = %d\n", 302 param[7] & TP_METRICS_BIT_1F_SPIKE); 303 psmouse_dbg(psmouse, "tp_2f_spike = %d\n", 304 (param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2); 305 psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n", 306 (param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4); 307 #endif 308 309 return 0; 310 } 311 312 static int cypress_query_hardware(struct psmouse *psmouse) 313 { 314 int error; 315 316 error = cypress_read_fw_version(psmouse); 317 if (error) 318 return error; 319 320 error = cypress_read_tp_metrics(psmouse); 321 if (error) 322 return error; 323 324 return 0; 325 } 326 327 static int cypress_set_absolute_mode(struct psmouse *psmouse) 328 { 329 struct cytp_data *cytp = psmouse->private; 330 u8 param[3]; 331 int error; 332 333 error = cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, 334 param); 335 if (error) 336 return error; 337 338 cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) 339 | CYTP_BIT_ABS_PRESSURE; 340 cypress_set_packet_size(psmouse, 5); 341 342 return 0; 343 } 344 345 /* 346 * Reset trackpad device. 347 * This is also the default mode when trackpad powered on. 348 */ 349 static void cypress_reset(struct psmouse *psmouse) 350 { 351 struct cytp_data *cytp = psmouse->private; 352 353 cytp->mode = 0; 354 355 psmouse_reset(psmouse); 356 } 357 358 static int cypress_set_input_params(struct input_dev *input, 359 struct cytp_data *cytp) 360 { 361 int error; 362 363 if (!cytp->tp_res_x || !cytp->tp_res_y) 364 return -EINVAL; 365 366 __set_bit(EV_ABS, input->evbit); 367 input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0); 368 input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0); 369 input_set_abs_params(input, ABS_PRESSURE, 370 cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0); 371 input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0); 372 373 /* finger position */ 374 input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0); 375 input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0); 376 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0); 377 378 error = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS, 379 INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK); 380 if (error) 381 return error; 382 383 __set_bit(INPUT_PROP_SEMI_MT, input->propbit); 384 385 input_abs_set_res(input, ABS_X, cytp->tp_res_x); 386 input_abs_set_res(input, ABS_Y, cytp->tp_res_y); 387 388 input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x); 389 input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y); 390 391 __set_bit(BTN_TOUCH, input->keybit); 392 __set_bit(BTN_TOOL_FINGER, input->keybit); 393 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); 394 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); 395 __set_bit(BTN_TOOL_QUADTAP, input->keybit); 396 __set_bit(BTN_TOOL_QUINTTAP, input->keybit); 397 398 __clear_bit(EV_REL, input->evbit); 399 __clear_bit(REL_X, input->relbit); 400 __clear_bit(REL_Y, input->relbit); 401 402 __set_bit(EV_KEY, input->evbit); 403 __set_bit(BTN_LEFT, input->keybit); 404 __set_bit(BTN_RIGHT, input->keybit); 405 __set_bit(BTN_MIDDLE, input->keybit); 406 407 return 0; 408 } 409 410 static int cypress_get_finger_count(u8 header_byte) 411 { 412 u8 bits6_7; 413 int finger_count; 414 415 bits6_7 = header_byte >> 6; 416 finger_count = bits6_7 & 0x03; 417 418 if (finger_count == 1) 419 return 1; 420 421 if (header_byte & ABS_HSCROLL_BIT) { 422 /* HSCROLL gets added on to 0 finger count. */ 423 switch (finger_count) { 424 case 0: return 4; 425 case 2: return 5; 426 default: 427 /* Invalid contact (e.g. palm). Ignore it. */ 428 return 0; 429 } 430 } 431 432 return finger_count; 433 } 434 435 436 static int cypress_parse_packet(struct psmouse *psmouse, 437 struct cytp_data *cytp, 438 struct cytp_report_data *report_data) 439 { 440 u8 *packet = psmouse->packet; 441 u8 header_byte = packet[0]; 442 443 memset(report_data, 0, sizeof(struct cytp_report_data)); 444 445 report_data->contact_cnt = cypress_get_finger_count(header_byte); 446 report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0; 447 448 if (report_data->contact_cnt == 1) { 449 report_data->contacts[0].x = 450 ((packet[1] & 0x70) << 4) | packet[2]; 451 report_data->contacts[0].y = 452 ((packet[1] & 0x07) << 8) | packet[3]; 453 if (cytp->mode & CYTP_BIT_ABS_PRESSURE) 454 report_data->contacts[0].z = packet[4]; 455 456 } else if (report_data->contact_cnt >= 2) { 457 report_data->contacts[0].x = 458 ((packet[1] & 0x70) << 4) | packet[2]; 459 report_data->contacts[0].y = 460 ((packet[1] & 0x07) << 8) | packet[3]; 461 if (cytp->mode & CYTP_BIT_ABS_PRESSURE) 462 report_data->contacts[0].z = packet[4]; 463 464 report_data->contacts[1].x = 465 ((packet[5] & 0xf0) << 4) | packet[6]; 466 report_data->contacts[1].y = 467 ((packet[5] & 0x0f) << 8) | packet[7]; 468 if (cytp->mode & CYTP_BIT_ABS_PRESSURE) 469 report_data->contacts[1].z = report_data->contacts[0].z; 470 } 471 472 report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0; 473 report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0; 474 475 /* 476 * This is only true if one of the mouse buttons were tapped. Make 477 * sure it doesn't turn into a click. The regular tap-to-click 478 * functionality will handle that on its own. If we don't do this, 479 * disabling tap-to-click won't affect the mouse button zones. 480 */ 481 if (report_data->tap) 482 report_data->left = 0; 483 484 #ifdef CYTP_DEBUG_VERBOSE 485 { 486 int i; 487 int n = report_data->contact_cnt; 488 psmouse_dbg(psmouse, "Dump parsed report data as below:\n"); 489 psmouse_dbg(psmouse, "contact_cnt = %d\n", 490 report_data->contact_cnt); 491 if (n > CYTP_MAX_MT_SLOTS) 492 n = CYTP_MAX_MT_SLOTS; 493 for (i = 0; i < n; i++) 494 psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i, 495 report_data->contacts[i].x, 496 report_data->contacts[i].y, 497 report_data->contacts[i].z); 498 psmouse_dbg(psmouse, "left = %d\n", report_data->left); 499 psmouse_dbg(psmouse, "right = %d\n", report_data->right); 500 psmouse_dbg(psmouse, "middle = %d\n", report_data->middle); 501 } 502 #endif 503 504 return 0; 505 } 506 507 static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt) 508 { 509 int i; 510 struct input_dev *input = psmouse->dev; 511 struct cytp_data *cytp = psmouse->private; 512 struct cytp_report_data report_data; 513 struct cytp_contact *contact; 514 struct input_mt_pos pos[CYTP_MAX_MT_SLOTS]; 515 int slots[CYTP_MAX_MT_SLOTS]; 516 int n; 517 518 cypress_parse_packet(psmouse, cytp, &report_data); 519 520 n = report_data.contact_cnt; 521 if (n > CYTP_MAX_MT_SLOTS) 522 n = CYTP_MAX_MT_SLOTS; 523 524 for (i = 0; i < n; i++) { 525 contact = &report_data.contacts[i]; 526 pos[i].x = contact->x; 527 pos[i].y = contact->y; 528 } 529 530 input_mt_assign_slots(input, slots, pos, n, 0); 531 532 for (i = 0; i < n; i++) { 533 contact = &report_data.contacts[i]; 534 input_mt_slot(input, slots[i]); 535 input_mt_report_slot_state(input, MT_TOOL_FINGER, true); 536 input_report_abs(input, ABS_MT_POSITION_X, contact->x); 537 input_report_abs(input, ABS_MT_POSITION_Y, contact->y); 538 input_report_abs(input, ABS_MT_PRESSURE, contact->z); 539 } 540 541 input_mt_sync_frame(input); 542 543 input_mt_report_finger_count(input, report_data.contact_cnt); 544 545 input_report_key(input, BTN_LEFT, report_data.left); 546 input_report_key(input, BTN_RIGHT, report_data.right); 547 input_report_key(input, BTN_MIDDLE, report_data.middle); 548 549 input_sync(input); 550 } 551 552 static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse) 553 { 554 int contact_cnt; 555 int index = psmouse->pktcnt - 1; 556 u8 *packet = psmouse->packet; 557 struct cytp_data *cytp = psmouse->private; 558 559 if (index < 0 || index > cytp->pkt_size) 560 return PSMOUSE_BAD_DATA; 561 562 if (index == 0 && (packet[0] & 0xfc) == 0) { 563 /* call packet process for reporting finger leave. */ 564 cypress_process_packet(psmouse, 1); 565 return PSMOUSE_FULL_PACKET; 566 } 567 568 /* 569 * Perform validation (and adjust packet size) based only on the 570 * first byte; allow all further bytes through. 571 */ 572 if (index != 0) 573 return PSMOUSE_GOOD_DATA; 574 575 /* 576 * If absolute/relative mode bit has not been set yet, just pass 577 * the byte through. 578 */ 579 if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0) 580 return PSMOUSE_GOOD_DATA; 581 582 if ((packet[0] & 0x08) == 0x08) 583 return PSMOUSE_BAD_DATA; 584 585 contact_cnt = cypress_get_finger_count(packet[0]); 586 if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE) 587 cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4); 588 else 589 cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5); 590 591 return PSMOUSE_GOOD_DATA; 592 } 593 594 static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse) 595 { 596 struct cytp_data *cytp = psmouse->private; 597 598 if (psmouse->pktcnt >= cytp->pkt_size) { 599 cypress_process_packet(psmouse, 0); 600 return PSMOUSE_FULL_PACKET; 601 } 602 603 return cypress_validate_byte(psmouse); 604 } 605 606 static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate) 607 { 608 struct cytp_data *cytp = psmouse->private; 609 u8 rate_param; 610 611 if (rate >= 80) { 612 psmouse->rate = 80; 613 cytp->mode |= CYTP_BIT_HIGH_RATE; 614 } else { 615 psmouse->rate = 40; 616 cytp->mode &= ~CYTP_BIT_HIGH_RATE; 617 } 618 619 rate_param = (u8)rate; 620 ps2_command(&psmouse->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 621 } 622 623 static void cypress_disconnect(struct psmouse *psmouse) 624 { 625 cypress_reset(psmouse); 626 kfree(psmouse->private); 627 psmouse->private = NULL; 628 } 629 630 static int cypress_reconnect(struct psmouse *psmouse) 631 { 632 int tries = CYTP_PS2_CMD_TRIES; 633 int error; 634 635 do { 636 cypress_reset(psmouse); 637 error = cypress_detect(psmouse, false); 638 } while (error && (--tries > 0)); 639 640 if (error) { 641 psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n"); 642 return error; 643 } 644 645 error = cypress_set_absolute_mode(psmouse); 646 if (error) { 647 psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n"); 648 return error; 649 } 650 651 return 0; 652 } 653 654 int cypress_init(struct psmouse *psmouse) 655 { 656 struct cytp_data *cytp; 657 int error; 658 659 cytp = kzalloc(sizeof(*cytp), GFP_KERNEL); 660 if (!cytp) 661 return -ENOMEM; 662 663 psmouse->private = cytp; 664 psmouse->pktsize = 8; 665 666 cypress_reset(psmouse); 667 668 error = cypress_query_hardware(psmouse); 669 if (error) { 670 psmouse_err(psmouse, "Unable to query Trackpad hardware.\n"); 671 goto err_exit; 672 } 673 674 error = cypress_set_absolute_mode(psmouse); 675 if (error) { 676 psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n"); 677 goto err_exit; 678 } 679 680 error = cypress_set_input_params(psmouse->dev, cytp); 681 if (error) { 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 error; 707 } 708