1 /* 2 * Atmel maXTouch Touchscreen driver 3 * 4 * Copyright (C) 2010 Samsung Electronics Co.Ltd 5 * Author: Joonyoung Shim <jy0922.shim@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/delay.h> 17 #include <linux/firmware.h> 18 #include <linux/i2c.h> 19 #include <linux/i2c/atmel_mxt_ts.h> 20 #include <linux/input/mt.h> 21 #include <linux/interrupt.h> 22 #include <linux/slab.h> 23 24 /* Version */ 25 #define MXT_VER_20 20 26 #define MXT_VER_21 21 27 #define MXT_VER_22 22 28 29 /* Slave addresses */ 30 #define MXT_APP_LOW 0x4a 31 #define MXT_APP_HIGH 0x4b 32 #define MXT_BOOT_LOW 0x24 33 #define MXT_BOOT_HIGH 0x25 34 35 /* Firmware */ 36 #define MXT_FW_NAME "maxtouch.fw" 37 38 /* Registers */ 39 #define MXT_FAMILY_ID 0x00 40 #define MXT_VARIANT_ID 0x01 41 #define MXT_VERSION 0x02 42 #define MXT_BUILD 0x03 43 #define MXT_MATRIX_X_SIZE 0x04 44 #define MXT_MATRIX_Y_SIZE 0x05 45 #define MXT_OBJECT_NUM 0x06 46 #define MXT_OBJECT_START 0x07 47 48 #define MXT_OBJECT_SIZE 6 49 50 /* Object types */ 51 #define MXT_DEBUG_DIAGNOSTIC 37 52 #define MXT_GEN_MESSAGE 5 53 #define MXT_GEN_COMMAND 6 54 #define MXT_GEN_POWER 7 55 #define MXT_GEN_ACQUIRE 8 56 #define MXT_TOUCH_MULTI 9 57 #define MXT_TOUCH_KEYARRAY 15 58 #define MXT_TOUCH_PROXIMITY 23 59 #define MXT_PROCI_GRIPFACE 20 60 #define MXT_PROCG_NOISE 22 61 #define MXT_PROCI_ONETOUCH 24 62 #define MXT_PROCI_TWOTOUCH 27 63 #define MXT_PROCI_GRIP 40 64 #define MXT_PROCI_PALM 41 65 #define MXT_SPT_COMMSCONFIG 18 66 #define MXT_SPT_GPIOPWM 19 67 #define MXT_SPT_SELFTEST 25 68 #define MXT_SPT_CTECONFIG 28 69 #define MXT_SPT_USERDATA 38 70 #define MXT_SPT_DIGITIZER 43 71 #define MXT_SPT_MESSAGECOUNT 44 72 73 /* MXT_GEN_COMMAND field */ 74 #define MXT_COMMAND_RESET 0 75 #define MXT_COMMAND_BACKUPNV 1 76 #define MXT_COMMAND_CALIBRATE 2 77 #define MXT_COMMAND_REPORTALL 3 78 #define MXT_COMMAND_DIAGNOSTIC 5 79 80 /* MXT_GEN_POWER field */ 81 #define MXT_POWER_IDLEACQINT 0 82 #define MXT_POWER_ACTVACQINT 1 83 #define MXT_POWER_ACTV2IDLETO 2 84 85 /* MXT_GEN_ACQUIRE field */ 86 #define MXT_ACQUIRE_CHRGTIME 0 87 #define MXT_ACQUIRE_TCHDRIFT 2 88 #define MXT_ACQUIRE_DRIFTST 3 89 #define MXT_ACQUIRE_TCHAUTOCAL 4 90 #define MXT_ACQUIRE_SYNC 5 91 #define MXT_ACQUIRE_ATCHCALST 6 92 #define MXT_ACQUIRE_ATCHCALSTHR 7 93 94 /* MXT_TOUCH_MULTI field */ 95 #define MXT_TOUCH_CTRL 0 96 #define MXT_TOUCH_XORIGIN 1 97 #define MXT_TOUCH_YORIGIN 2 98 #define MXT_TOUCH_XSIZE 3 99 #define MXT_TOUCH_YSIZE 4 100 #define MXT_TOUCH_BLEN 6 101 #define MXT_TOUCH_TCHTHR 7 102 #define MXT_TOUCH_TCHDI 8 103 #define MXT_TOUCH_ORIENT 9 104 #define MXT_TOUCH_MOVHYSTI 11 105 #define MXT_TOUCH_MOVHYSTN 12 106 #define MXT_TOUCH_NUMTOUCH 14 107 #define MXT_TOUCH_MRGHYST 15 108 #define MXT_TOUCH_MRGTHR 16 109 #define MXT_TOUCH_AMPHYST 17 110 #define MXT_TOUCH_XRANGE_LSB 18 111 #define MXT_TOUCH_XRANGE_MSB 19 112 #define MXT_TOUCH_YRANGE_LSB 20 113 #define MXT_TOUCH_YRANGE_MSB 21 114 #define MXT_TOUCH_XLOCLIP 22 115 #define MXT_TOUCH_XHICLIP 23 116 #define MXT_TOUCH_YLOCLIP 24 117 #define MXT_TOUCH_YHICLIP 25 118 #define MXT_TOUCH_XEDGECTRL 26 119 #define MXT_TOUCH_XEDGEDIST 27 120 #define MXT_TOUCH_YEDGECTRL 28 121 #define MXT_TOUCH_YEDGEDIST 29 122 #define MXT_TOUCH_JUMPLIMIT 30 123 124 /* MXT_PROCI_GRIPFACE field */ 125 #define MXT_GRIPFACE_CTRL 0 126 #define MXT_GRIPFACE_XLOGRIP 1 127 #define MXT_GRIPFACE_XHIGRIP 2 128 #define MXT_GRIPFACE_YLOGRIP 3 129 #define MXT_GRIPFACE_YHIGRIP 4 130 #define MXT_GRIPFACE_MAXTCHS 5 131 #define MXT_GRIPFACE_SZTHR1 7 132 #define MXT_GRIPFACE_SZTHR2 8 133 #define MXT_GRIPFACE_SHPTHR1 9 134 #define MXT_GRIPFACE_SHPTHR2 10 135 #define MXT_GRIPFACE_SUPEXTTO 11 136 137 /* MXT_PROCI_NOISE field */ 138 #define MXT_NOISE_CTRL 0 139 #define MXT_NOISE_OUTFLEN 1 140 #define MXT_NOISE_GCAFUL_LSB 3 141 #define MXT_NOISE_GCAFUL_MSB 4 142 #define MXT_NOISE_GCAFLL_LSB 5 143 #define MXT_NOISE_GCAFLL_MSB 6 144 #define MXT_NOISE_ACTVGCAFVALID 7 145 #define MXT_NOISE_NOISETHR 8 146 #define MXT_NOISE_FREQHOPSCALE 10 147 #define MXT_NOISE_FREQ0 11 148 #define MXT_NOISE_FREQ1 12 149 #define MXT_NOISE_FREQ2 13 150 #define MXT_NOISE_FREQ3 14 151 #define MXT_NOISE_FREQ4 15 152 #define MXT_NOISE_IDLEGCAFVALID 16 153 154 /* MXT_SPT_COMMSCONFIG */ 155 #define MXT_COMMS_CTRL 0 156 #define MXT_COMMS_CMD 1 157 158 /* MXT_SPT_CTECONFIG field */ 159 #define MXT_CTE_CTRL 0 160 #define MXT_CTE_CMD 1 161 #define MXT_CTE_MODE 2 162 #define MXT_CTE_IDLEGCAFDEPTH 3 163 #define MXT_CTE_ACTVGCAFDEPTH 4 164 #define MXT_CTE_VOLTAGE 5 165 166 #define MXT_VOLTAGE_DEFAULT 2700000 167 #define MXT_VOLTAGE_STEP 10000 168 169 /* Define for MXT_GEN_COMMAND */ 170 #define MXT_BOOT_VALUE 0xa5 171 #define MXT_BACKUP_VALUE 0x55 172 #define MXT_BACKUP_TIME 25 /* msec */ 173 #define MXT_RESET_TIME 65 /* msec */ 174 175 #define MXT_FWRESET_TIME 175 /* msec */ 176 177 /* Command to unlock bootloader */ 178 #define MXT_UNLOCK_CMD_MSB 0xaa 179 #define MXT_UNLOCK_CMD_LSB 0xdc 180 181 /* Bootloader mode status */ 182 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ 183 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ 184 #define MXT_FRAME_CRC_CHECK 0x02 185 #define MXT_FRAME_CRC_FAIL 0x03 186 #define MXT_FRAME_CRC_PASS 0x04 187 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ 188 #define MXT_BOOT_STATUS_MASK 0x3f 189 190 /* Touch status */ 191 #define MXT_SUPPRESS (1 << 1) 192 #define MXT_AMP (1 << 2) 193 #define MXT_VECTOR (1 << 3) 194 #define MXT_MOVE (1 << 4) 195 #define MXT_RELEASE (1 << 5) 196 #define MXT_PRESS (1 << 6) 197 #define MXT_DETECT (1 << 7) 198 199 /* Touch orient bits */ 200 #define MXT_XY_SWITCH (1 << 0) 201 #define MXT_X_INVERT (1 << 1) 202 #define MXT_Y_INVERT (1 << 2) 203 204 /* Touchscreen absolute values */ 205 #define MXT_MAX_AREA 0xff 206 207 #define MXT_MAX_FINGER 10 208 209 struct mxt_info { 210 u8 family_id; 211 u8 variant_id; 212 u8 version; 213 u8 build; 214 u8 matrix_xsize; 215 u8 matrix_ysize; 216 u8 object_num; 217 }; 218 219 struct mxt_object { 220 u8 type; 221 u16 start_address; 222 u8 size; 223 u8 instances; 224 u8 num_report_ids; 225 226 /* to map object and message */ 227 u8 max_reportid; 228 }; 229 230 struct mxt_message { 231 u8 reportid; 232 u8 message[7]; 233 u8 checksum; 234 }; 235 236 struct mxt_finger { 237 int status; 238 int x; 239 int y; 240 int area; 241 }; 242 243 /* Each client has this additional data */ 244 struct mxt_data { 245 struct i2c_client *client; 246 struct input_dev *input_dev; 247 const struct mxt_platform_data *pdata; 248 struct mxt_object *object_table; 249 struct mxt_info info; 250 struct mxt_finger finger[MXT_MAX_FINGER]; 251 unsigned int irq; 252 unsigned int max_x; 253 unsigned int max_y; 254 }; 255 256 static bool mxt_object_readable(unsigned int type) 257 { 258 switch (type) { 259 case MXT_GEN_MESSAGE: 260 case MXT_GEN_COMMAND: 261 case MXT_GEN_POWER: 262 case MXT_GEN_ACQUIRE: 263 case MXT_TOUCH_MULTI: 264 case MXT_TOUCH_KEYARRAY: 265 case MXT_TOUCH_PROXIMITY: 266 case MXT_PROCI_GRIPFACE: 267 case MXT_PROCG_NOISE: 268 case MXT_PROCI_ONETOUCH: 269 case MXT_PROCI_TWOTOUCH: 270 case MXT_PROCI_GRIP: 271 case MXT_PROCI_PALM: 272 case MXT_SPT_COMMSCONFIG: 273 case MXT_SPT_GPIOPWM: 274 case MXT_SPT_SELFTEST: 275 case MXT_SPT_CTECONFIG: 276 case MXT_SPT_USERDATA: 277 return true; 278 default: 279 return false; 280 } 281 } 282 283 static bool mxt_object_writable(unsigned int type) 284 { 285 switch (type) { 286 case MXT_GEN_COMMAND: 287 case MXT_GEN_POWER: 288 case MXT_GEN_ACQUIRE: 289 case MXT_TOUCH_MULTI: 290 case MXT_TOUCH_KEYARRAY: 291 case MXT_TOUCH_PROXIMITY: 292 case MXT_PROCI_GRIPFACE: 293 case MXT_PROCG_NOISE: 294 case MXT_PROCI_ONETOUCH: 295 case MXT_PROCI_TWOTOUCH: 296 case MXT_PROCI_GRIP: 297 case MXT_PROCI_PALM: 298 case MXT_SPT_GPIOPWM: 299 case MXT_SPT_SELFTEST: 300 case MXT_SPT_CTECONFIG: 301 return true; 302 default: 303 return false; 304 } 305 } 306 307 static void mxt_dump_message(struct device *dev, 308 struct mxt_message *message) 309 { 310 dev_dbg(dev, "reportid:\t0x%x\n", message->reportid); 311 dev_dbg(dev, "message1:\t0x%x\n", message->message[0]); 312 dev_dbg(dev, "message2:\t0x%x\n", message->message[1]); 313 dev_dbg(dev, "message3:\t0x%x\n", message->message[2]); 314 dev_dbg(dev, "message4:\t0x%x\n", message->message[3]); 315 dev_dbg(dev, "message5:\t0x%x\n", message->message[4]); 316 dev_dbg(dev, "message6:\t0x%x\n", message->message[5]); 317 dev_dbg(dev, "message7:\t0x%x\n", message->message[6]); 318 dev_dbg(dev, "checksum:\t0x%x\n", message->checksum); 319 } 320 321 static int mxt_check_bootloader(struct i2c_client *client, 322 unsigned int state) 323 { 324 u8 val; 325 326 recheck: 327 if (i2c_master_recv(client, &val, 1) != 1) { 328 dev_err(&client->dev, "%s: i2c recv failed\n", __func__); 329 return -EIO; 330 } 331 332 switch (state) { 333 case MXT_WAITING_BOOTLOAD_CMD: 334 case MXT_WAITING_FRAME_DATA: 335 val &= ~MXT_BOOT_STATUS_MASK; 336 break; 337 case MXT_FRAME_CRC_PASS: 338 if (val == MXT_FRAME_CRC_CHECK) 339 goto recheck; 340 break; 341 default: 342 return -EINVAL; 343 } 344 345 if (val != state) { 346 dev_err(&client->dev, "Unvalid bootloader mode state\n"); 347 return -EINVAL; 348 } 349 350 return 0; 351 } 352 353 static int mxt_unlock_bootloader(struct i2c_client *client) 354 { 355 u8 buf[2]; 356 357 buf[0] = MXT_UNLOCK_CMD_LSB; 358 buf[1] = MXT_UNLOCK_CMD_MSB; 359 360 if (i2c_master_send(client, buf, 2) != 2) { 361 dev_err(&client->dev, "%s: i2c send failed\n", __func__); 362 return -EIO; 363 } 364 365 return 0; 366 } 367 368 static int mxt_fw_write(struct i2c_client *client, 369 const u8 *data, unsigned int frame_size) 370 { 371 if (i2c_master_send(client, data, frame_size) != frame_size) { 372 dev_err(&client->dev, "%s: i2c send failed\n", __func__); 373 return -EIO; 374 } 375 376 return 0; 377 } 378 379 static int __mxt_read_reg(struct i2c_client *client, 380 u16 reg, u16 len, void *val) 381 { 382 struct i2c_msg xfer[2]; 383 u8 buf[2]; 384 385 buf[0] = reg & 0xff; 386 buf[1] = (reg >> 8) & 0xff; 387 388 /* Write register */ 389 xfer[0].addr = client->addr; 390 xfer[0].flags = 0; 391 xfer[0].len = 2; 392 xfer[0].buf = buf; 393 394 /* Read data */ 395 xfer[1].addr = client->addr; 396 xfer[1].flags = I2C_M_RD; 397 xfer[1].len = len; 398 xfer[1].buf = val; 399 400 if (i2c_transfer(client->adapter, xfer, 2) != 2) { 401 dev_err(&client->dev, "%s: i2c transfer failed\n", __func__); 402 return -EIO; 403 } 404 405 return 0; 406 } 407 408 static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val) 409 { 410 return __mxt_read_reg(client, reg, 1, val); 411 } 412 413 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) 414 { 415 u8 buf[3]; 416 417 buf[0] = reg & 0xff; 418 buf[1] = (reg >> 8) & 0xff; 419 buf[2] = val; 420 421 if (i2c_master_send(client, buf, 3) != 3) { 422 dev_err(&client->dev, "%s: i2c send failed\n", __func__); 423 return -EIO; 424 } 425 426 return 0; 427 } 428 429 static int mxt_read_object_table(struct i2c_client *client, 430 u16 reg, u8 *object_buf) 431 { 432 return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE, 433 object_buf); 434 } 435 436 static struct mxt_object * 437 mxt_get_object(struct mxt_data *data, u8 type) 438 { 439 struct mxt_object *object; 440 int i; 441 442 for (i = 0; i < data->info.object_num; i++) { 443 object = data->object_table + i; 444 if (object->type == type) 445 return object; 446 } 447 448 dev_err(&data->client->dev, "Invalid object type\n"); 449 return NULL; 450 } 451 452 static int mxt_read_message(struct mxt_data *data, 453 struct mxt_message *message) 454 { 455 struct mxt_object *object; 456 u16 reg; 457 458 object = mxt_get_object(data, MXT_GEN_MESSAGE); 459 if (!object) 460 return -EINVAL; 461 462 reg = object->start_address; 463 return __mxt_read_reg(data->client, reg, 464 sizeof(struct mxt_message), message); 465 } 466 467 static int mxt_read_object(struct mxt_data *data, 468 u8 type, u8 offset, u8 *val) 469 { 470 struct mxt_object *object; 471 u16 reg; 472 473 object = mxt_get_object(data, type); 474 if (!object) 475 return -EINVAL; 476 477 reg = object->start_address; 478 return __mxt_read_reg(data->client, reg + offset, 1, val); 479 } 480 481 static int mxt_write_object(struct mxt_data *data, 482 u8 type, u8 offset, u8 val) 483 { 484 struct mxt_object *object; 485 u16 reg; 486 487 object = mxt_get_object(data, type); 488 if (!object) 489 return -EINVAL; 490 491 reg = object->start_address; 492 return mxt_write_reg(data->client, reg + offset, val); 493 } 494 495 static void mxt_input_report(struct mxt_data *data, int single_id) 496 { 497 struct mxt_finger *finger = data->finger; 498 struct input_dev *input_dev = data->input_dev; 499 int status = finger[single_id].status; 500 int finger_num = 0; 501 int id; 502 503 for (id = 0; id < MXT_MAX_FINGER; id++) { 504 if (!finger[id].status) 505 continue; 506 507 input_mt_slot(input_dev, id); 508 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 509 finger[id].status != MXT_RELEASE); 510 511 if (finger[id].status != MXT_RELEASE) { 512 finger_num++; 513 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, 514 finger[id].area); 515 input_report_abs(input_dev, ABS_MT_POSITION_X, 516 finger[id].x); 517 input_report_abs(input_dev, ABS_MT_POSITION_Y, 518 finger[id].y); 519 } else { 520 finger[id].status = 0; 521 } 522 } 523 524 input_report_key(input_dev, BTN_TOUCH, finger_num > 0); 525 526 if (status != MXT_RELEASE) { 527 input_report_abs(input_dev, ABS_X, finger[single_id].x); 528 input_report_abs(input_dev, ABS_Y, finger[single_id].y); 529 } 530 531 input_sync(input_dev); 532 } 533 534 static void mxt_input_touchevent(struct mxt_data *data, 535 struct mxt_message *message, int id) 536 { 537 struct mxt_finger *finger = data->finger; 538 struct device *dev = &data->client->dev; 539 u8 status = message->message[0]; 540 int x; 541 int y; 542 int area; 543 544 /* Check the touch is present on the screen */ 545 if (!(status & MXT_DETECT)) { 546 if (status & MXT_RELEASE) { 547 dev_dbg(dev, "[%d] released\n", id); 548 549 finger[id].status = MXT_RELEASE; 550 mxt_input_report(data, id); 551 } 552 return; 553 } 554 555 /* Check only AMP detection */ 556 if (!(status & (MXT_PRESS | MXT_MOVE))) 557 return; 558 559 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf); 560 y = (message->message[2] << 4) | ((message->message[3] & 0xf)); 561 if (data->max_x < 1024) 562 x = x >> 2; 563 if (data->max_y < 1024) 564 y = y >> 2; 565 566 area = message->message[4]; 567 568 dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id, 569 status & MXT_MOVE ? "moved" : "pressed", 570 x, y, area); 571 572 finger[id].status = status & MXT_MOVE ? 573 MXT_MOVE : MXT_PRESS; 574 finger[id].x = x; 575 finger[id].y = y; 576 finger[id].area = area; 577 578 mxt_input_report(data, id); 579 } 580 581 static irqreturn_t mxt_interrupt(int irq, void *dev_id) 582 { 583 struct mxt_data *data = dev_id; 584 struct mxt_message message; 585 struct mxt_object *object; 586 struct device *dev = &data->client->dev; 587 int id; 588 u8 reportid; 589 u8 max_reportid; 590 u8 min_reportid; 591 592 do { 593 if (mxt_read_message(data, &message)) { 594 dev_err(dev, "Failed to read message\n"); 595 goto end; 596 } 597 598 reportid = message.reportid; 599 600 /* whether reportid is thing of MXT_TOUCH_MULTI */ 601 object = mxt_get_object(data, MXT_TOUCH_MULTI); 602 if (!object) 603 goto end; 604 605 max_reportid = object->max_reportid; 606 min_reportid = max_reportid - object->num_report_ids + 1; 607 id = reportid - min_reportid; 608 609 if (reportid >= min_reportid && reportid <= max_reportid) 610 mxt_input_touchevent(data, &message, id); 611 else 612 mxt_dump_message(dev, &message); 613 } while (reportid != 0xff); 614 615 end: 616 return IRQ_HANDLED; 617 } 618 619 static int mxt_check_reg_init(struct mxt_data *data) 620 { 621 const struct mxt_platform_data *pdata = data->pdata; 622 struct mxt_object *object; 623 struct device *dev = &data->client->dev; 624 int index = 0; 625 int i, j, config_offset; 626 627 if (!pdata->config) { 628 dev_dbg(dev, "No cfg data defined, skipping reg init\n"); 629 return 0; 630 } 631 632 for (i = 0; i < data->info.object_num; i++) { 633 object = data->object_table + i; 634 635 if (!mxt_object_writable(object->type)) 636 continue; 637 638 for (j = 0; j < object->size + 1; j++) { 639 config_offset = index + j; 640 if (config_offset > pdata->config_length) { 641 dev_err(dev, "Not enough config data!\n"); 642 return -EINVAL; 643 } 644 mxt_write_object(data, object->type, j, 645 pdata->config[config_offset]); 646 } 647 index += object->size + 1; 648 } 649 650 return 0; 651 } 652 653 static int mxt_make_highchg(struct mxt_data *data) 654 { 655 struct device *dev = &data->client->dev; 656 struct mxt_message message; 657 int count = 10; 658 int error; 659 660 /* Read dummy message to make high CHG pin */ 661 do { 662 error = mxt_read_message(data, &message); 663 if (error) 664 return error; 665 } while (message.reportid != 0xff && --count); 666 667 if (!count) { 668 dev_err(dev, "CHG pin isn't cleared\n"); 669 return -EBUSY; 670 } 671 672 return 0; 673 } 674 675 static void mxt_handle_pdata(struct mxt_data *data) 676 { 677 const struct mxt_platform_data *pdata = data->pdata; 678 u8 voltage; 679 680 /* Set touchscreen lines */ 681 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE, 682 pdata->x_line); 683 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE, 684 pdata->y_line); 685 686 /* Set touchscreen orient */ 687 mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT, 688 pdata->orient); 689 690 /* Set touchscreen burst length */ 691 mxt_write_object(data, MXT_TOUCH_MULTI, 692 MXT_TOUCH_BLEN, pdata->blen); 693 694 /* Set touchscreen threshold */ 695 mxt_write_object(data, MXT_TOUCH_MULTI, 696 MXT_TOUCH_TCHTHR, pdata->threshold); 697 698 /* Set touchscreen resolution */ 699 mxt_write_object(data, MXT_TOUCH_MULTI, 700 MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff); 701 mxt_write_object(data, MXT_TOUCH_MULTI, 702 MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8); 703 mxt_write_object(data, MXT_TOUCH_MULTI, 704 MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff); 705 mxt_write_object(data, MXT_TOUCH_MULTI, 706 MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8); 707 708 /* Set touchscreen voltage */ 709 if (pdata->voltage) { 710 if (pdata->voltage < MXT_VOLTAGE_DEFAULT) { 711 voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) / 712 MXT_VOLTAGE_STEP; 713 voltage = 0xff - voltage + 1; 714 } else 715 voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) / 716 MXT_VOLTAGE_STEP; 717 718 mxt_write_object(data, MXT_SPT_CTECONFIG, 719 MXT_CTE_VOLTAGE, voltage); 720 } 721 } 722 723 static int mxt_get_info(struct mxt_data *data) 724 { 725 struct i2c_client *client = data->client; 726 struct mxt_info *info = &data->info; 727 int error; 728 u8 val; 729 730 error = mxt_read_reg(client, MXT_FAMILY_ID, &val); 731 if (error) 732 return error; 733 info->family_id = val; 734 735 error = mxt_read_reg(client, MXT_VARIANT_ID, &val); 736 if (error) 737 return error; 738 info->variant_id = val; 739 740 error = mxt_read_reg(client, MXT_VERSION, &val); 741 if (error) 742 return error; 743 info->version = val; 744 745 error = mxt_read_reg(client, MXT_BUILD, &val); 746 if (error) 747 return error; 748 info->build = val; 749 750 error = mxt_read_reg(client, MXT_OBJECT_NUM, &val); 751 if (error) 752 return error; 753 info->object_num = val; 754 755 return 0; 756 } 757 758 static int mxt_get_object_table(struct mxt_data *data) 759 { 760 int error; 761 int i; 762 u16 reg; 763 u8 reportid = 0; 764 u8 buf[MXT_OBJECT_SIZE]; 765 766 for (i = 0; i < data->info.object_num; i++) { 767 struct mxt_object *object = data->object_table + i; 768 769 reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i; 770 error = mxt_read_object_table(data->client, reg, buf); 771 if (error) 772 return error; 773 774 object->type = buf[0]; 775 object->start_address = (buf[2] << 8) | buf[1]; 776 object->size = buf[3]; 777 object->instances = buf[4]; 778 object->num_report_ids = buf[5]; 779 780 if (object->num_report_ids) { 781 reportid += object->num_report_ids * 782 (object->instances + 1); 783 object->max_reportid = reportid; 784 } 785 } 786 787 return 0; 788 } 789 790 static int mxt_initialize(struct mxt_data *data) 791 { 792 struct i2c_client *client = data->client; 793 struct mxt_info *info = &data->info; 794 int error; 795 u8 val; 796 797 error = mxt_get_info(data); 798 if (error) 799 return error; 800 801 data->object_table = kcalloc(info->object_num, 802 sizeof(struct mxt_object), 803 GFP_KERNEL); 804 if (!data->object_table) { 805 dev_err(&client->dev, "Failed to allocate memory\n"); 806 return -ENOMEM; 807 } 808 809 /* Get object table information */ 810 error = mxt_get_object_table(data); 811 if (error) 812 return error; 813 814 /* Check register init values */ 815 error = mxt_check_reg_init(data); 816 if (error) 817 return error; 818 819 mxt_handle_pdata(data); 820 821 /* Backup to memory */ 822 mxt_write_object(data, MXT_GEN_COMMAND, 823 MXT_COMMAND_BACKUPNV, 824 MXT_BACKUP_VALUE); 825 msleep(MXT_BACKUP_TIME); 826 827 /* Soft reset */ 828 mxt_write_object(data, MXT_GEN_COMMAND, 829 MXT_COMMAND_RESET, 1); 830 msleep(MXT_RESET_TIME); 831 832 /* Update matrix size at info struct */ 833 error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val); 834 if (error) 835 return error; 836 info->matrix_xsize = val; 837 838 error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val); 839 if (error) 840 return error; 841 info->matrix_ysize = val; 842 843 dev_info(&client->dev, 844 "Family ID: %d Variant ID: %d Version: %d Build: %d\n", 845 info->family_id, info->variant_id, info->version, 846 info->build); 847 848 dev_info(&client->dev, 849 "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n", 850 info->matrix_xsize, info->matrix_ysize, 851 info->object_num); 852 853 return 0; 854 } 855 856 static void mxt_calc_resolution(struct mxt_data *data) 857 { 858 unsigned int max_x = data->pdata->x_size - 1; 859 unsigned int max_y = data->pdata->y_size - 1; 860 861 if (data->pdata->orient & MXT_XY_SWITCH) { 862 data->max_x = max_y; 863 data->max_y = max_x; 864 } else { 865 data->max_x = max_x; 866 data->max_y = max_y; 867 } 868 } 869 870 static ssize_t mxt_object_show(struct device *dev, 871 struct device_attribute *attr, char *buf) 872 { 873 struct mxt_data *data = dev_get_drvdata(dev); 874 struct mxt_object *object; 875 int count = 0; 876 int i, j; 877 int error; 878 u8 val; 879 880 for (i = 0; i < data->info.object_num; i++) { 881 object = data->object_table + i; 882 883 count += sprintf(buf + count, 884 "Object Table Element %d(Type %d)\n", 885 i + 1, object->type); 886 887 if (!mxt_object_readable(object->type)) { 888 count += sprintf(buf + count, "\n"); 889 continue; 890 } 891 892 for (j = 0; j < object->size + 1; j++) { 893 error = mxt_read_object(data, 894 object->type, j, &val); 895 if (error) 896 return error; 897 898 count += sprintf(buf + count, 899 " Byte %d: 0x%x (%d)\n", j, val, val); 900 } 901 902 count += sprintf(buf + count, "\n"); 903 } 904 905 return count; 906 } 907 908 static int mxt_load_fw(struct device *dev, const char *fn) 909 { 910 struct mxt_data *data = dev_get_drvdata(dev); 911 struct i2c_client *client = data->client; 912 const struct firmware *fw = NULL; 913 unsigned int frame_size; 914 unsigned int pos = 0; 915 int ret; 916 917 ret = request_firmware(&fw, fn, dev); 918 if (ret) { 919 dev_err(dev, "Unable to open firmware %s\n", fn); 920 return ret; 921 } 922 923 /* Change to the bootloader mode */ 924 mxt_write_object(data, MXT_GEN_COMMAND, 925 MXT_COMMAND_RESET, MXT_BOOT_VALUE); 926 msleep(MXT_RESET_TIME); 927 928 /* Change to slave address of bootloader */ 929 if (client->addr == MXT_APP_LOW) 930 client->addr = MXT_BOOT_LOW; 931 else 932 client->addr = MXT_BOOT_HIGH; 933 934 ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD); 935 if (ret) 936 goto out; 937 938 /* Unlock bootloader */ 939 mxt_unlock_bootloader(client); 940 941 while (pos < fw->size) { 942 ret = mxt_check_bootloader(client, 943 MXT_WAITING_FRAME_DATA); 944 if (ret) 945 goto out; 946 947 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); 948 949 /* We should add 2 at frame size as the the firmware data is not 950 * included the CRC bytes. 951 */ 952 frame_size += 2; 953 954 /* Write one frame to device */ 955 mxt_fw_write(client, fw->data + pos, frame_size); 956 957 ret = mxt_check_bootloader(client, 958 MXT_FRAME_CRC_PASS); 959 if (ret) 960 goto out; 961 962 pos += frame_size; 963 964 dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size); 965 } 966 967 out: 968 release_firmware(fw); 969 970 /* Change to slave address of application */ 971 if (client->addr == MXT_BOOT_LOW) 972 client->addr = MXT_APP_LOW; 973 else 974 client->addr = MXT_APP_HIGH; 975 976 return ret; 977 } 978 979 static ssize_t mxt_update_fw_store(struct device *dev, 980 struct device_attribute *attr, 981 const char *buf, size_t count) 982 { 983 struct mxt_data *data = dev_get_drvdata(dev); 984 int error; 985 986 disable_irq(data->irq); 987 988 error = mxt_load_fw(dev, MXT_FW_NAME); 989 if (error) { 990 dev_err(dev, "The firmware update failed(%d)\n", error); 991 count = error; 992 } else { 993 dev_dbg(dev, "The firmware update succeeded\n"); 994 995 /* Wait for reset */ 996 msleep(MXT_FWRESET_TIME); 997 998 kfree(data->object_table); 999 data->object_table = NULL; 1000 1001 mxt_initialize(data); 1002 } 1003 1004 enable_irq(data->irq); 1005 1006 error = mxt_make_highchg(data); 1007 if (error) 1008 return error; 1009 1010 return count; 1011 } 1012 1013 static DEVICE_ATTR(object, 0444, mxt_object_show, NULL); 1014 static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store); 1015 1016 static struct attribute *mxt_attrs[] = { 1017 &dev_attr_object.attr, 1018 &dev_attr_update_fw.attr, 1019 NULL 1020 }; 1021 1022 static const struct attribute_group mxt_attr_group = { 1023 .attrs = mxt_attrs, 1024 }; 1025 1026 static void mxt_start(struct mxt_data *data) 1027 { 1028 /* Touch enable */ 1029 mxt_write_object(data, 1030 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83); 1031 } 1032 1033 static void mxt_stop(struct mxt_data *data) 1034 { 1035 /* Touch disable */ 1036 mxt_write_object(data, 1037 MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0); 1038 } 1039 1040 static int mxt_input_open(struct input_dev *dev) 1041 { 1042 struct mxt_data *data = input_get_drvdata(dev); 1043 1044 mxt_start(data); 1045 1046 return 0; 1047 } 1048 1049 static void mxt_input_close(struct input_dev *dev) 1050 { 1051 struct mxt_data *data = input_get_drvdata(dev); 1052 1053 mxt_stop(data); 1054 } 1055 1056 static int __devinit mxt_probe(struct i2c_client *client, 1057 const struct i2c_device_id *id) 1058 { 1059 const struct mxt_platform_data *pdata = client->dev.platform_data; 1060 struct mxt_data *data; 1061 struct input_dev *input_dev; 1062 int error; 1063 1064 if (!pdata) 1065 return -EINVAL; 1066 1067 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL); 1068 input_dev = input_allocate_device(); 1069 if (!data || !input_dev) { 1070 dev_err(&client->dev, "Failed to allocate memory\n"); 1071 error = -ENOMEM; 1072 goto err_free_mem; 1073 } 1074 1075 input_dev->name = "Atmel maXTouch Touchscreen"; 1076 input_dev->id.bustype = BUS_I2C; 1077 input_dev->dev.parent = &client->dev; 1078 input_dev->open = mxt_input_open; 1079 input_dev->close = mxt_input_close; 1080 1081 data->client = client; 1082 data->input_dev = input_dev; 1083 data->pdata = pdata; 1084 data->irq = client->irq; 1085 1086 mxt_calc_resolution(data); 1087 1088 __set_bit(EV_ABS, input_dev->evbit); 1089 __set_bit(EV_KEY, input_dev->evbit); 1090 __set_bit(BTN_TOUCH, input_dev->keybit); 1091 1092 /* For single touch */ 1093 input_set_abs_params(input_dev, ABS_X, 1094 0, data->max_x, 0, 0); 1095 input_set_abs_params(input_dev, ABS_Y, 1096 0, data->max_y, 0, 0); 1097 1098 /* For multi touch */ 1099 input_mt_init_slots(input_dev, MXT_MAX_FINGER); 1100 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 1101 0, MXT_MAX_AREA, 0, 0); 1102 input_set_abs_params(input_dev, ABS_MT_POSITION_X, 1103 0, data->max_x, 0, 0); 1104 input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 1105 0, data->max_y, 0, 0); 1106 1107 input_set_drvdata(input_dev, data); 1108 i2c_set_clientdata(client, data); 1109 1110 error = mxt_initialize(data); 1111 if (error) 1112 goto err_free_object; 1113 1114 error = request_threaded_irq(client->irq, NULL, mxt_interrupt, 1115 pdata->irqflags, client->dev.driver->name, data); 1116 if (error) { 1117 dev_err(&client->dev, "Failed to register interrupt\n"); 1118 goto err_free_object; 1119 } 1120 1121 error = mxt_make_highchg(data); 1122 if (error) 1123 goto err_free_irq; 1124 1125 error = input_register_device(input_dev); 1126 if (error) 1127 goto err_free_irq; 1128 1129 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); 1130 if (error) 1131 goto err_unregister_device; 1132 1133 return 0; 1134 1135 err_unregister_device: 1136 input_unregister_device(input_dev); 1137 input_dev = NULL; 1138 err_free_irq: 1139 free_irq(client->irq, data); 1140 err_free_object: 1141 kfree(data->object_table); 1142 err_free_mem: 1143 input_free_device(input_dev); 1144 kfree(data); 1145 return error; 1146 } 1147 1148 static int __devexit mxt_remove(struct i2c_client *client) 1149 { 1150 struct mxt_data *data = i2c_get_clientdata(client); 1151 1152 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); 1153 free_irq(data->irq, data); 1154 input_unregister_device(data->input_dev); 1155 kfree(data->object_table); 1156 kfree(data); 1157 1158 return 0; 1159 } 1160 1161 #ifdef CONFIG_PM 1162 static int mxt_suspend(struct device *dev) 1163 { 1164 struct i2c_client *client = to_i2c_client(dev); 1165 struct mxt_data *data = i2c_get_clientdata(client); 1166 struct input_dev *input_dev = data->input_dev; 1167 1168 mutex_lock(&input_dev->mutex); 1169 1170 if (input_dev->users) 1171 mxt_stop(data); 1172 1173 mutex_unlock(&input_dev->mutex); 1174 1175 return 0; 1176 } 1177 1178 static int mxt_resume(struct device *dev) 1179 { 1180 struct i2c_client *client = to_i2c_client(dev); 1181 struct mxt_data *data = i2c_get_clientdata(client); 1182 struct input_dev *input_dev = data->input_dev; 1183 1184 /* Soft reset */ 1185 mxt_write_object(data, MXT_GEN_COMMAND, 1186 MXT_COMMAND_RESET, 1); 1187 1188 msleep(MXT_RESET_TIME); 1189 1190 mutex_lock(&input_dev->mutex); 1191 1192 if (input_dev->users) 1193 mxt_start(data); 1194 1195 mutex_unlock(&input_dev->mutex); 1196 1197 return 0; 1198 } 1199 1200 static const struct dev_pm_ops mxt_pm_ops = { 1201 .suspend = mxt_suspend, 1202 .resume = mxt_resume, 1203 }; 1204 #endif 1205 1206 static const struct i2c_device_id mxt_id[] = { 1207 { "qt602240_ts", 0 }, 1208 { "atmel_mxt_ts", 0 }, 1209 { "mXT224", 0 }, 1210 { } 1211 }; 1212 MODULE_DEVICE_TABLE(i2c, mxt_id); 1213 1214 static struct i2c_driver mxt_driver = { 1215 .driver = { 1216 .name = "atmel_mxt_ts", 1217 .owner = THIS_MODULE, 1218 #ifdef CONFIG_PM 1219 .pm = &mxt_pm_ops, 1220 #endif 1221 }, 1222 .probe = mxt_probe, 1223 .remove = __devexit_p(mxt_remove), 1224 .id_table = mxt_id, 1225 }; 1226 1227 static int __init mxt_init(void) 1228 { 1229 return i2c_add_driver(&mxt_driver); 1230 } 1231 1232 static void __exit mxt_exit(void) 1233 { 1234 i2c_del_driver(&mxt_driver); 1235 } 1236 1237 module_init(mxt_init); 1238 module_exit(mxt_exit); 1239 1240 /* Module information */ 1241 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 1242 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); 1243 MODULE_LICENSE("GPL"); 1244