1 /* 2 * Atmel maXTouch Touchscreen driver 3 * 4 * Copyright (C) 2010 Samsung Electronics Co.Ltd 5 * Copyright (C) 2012 Google, Inc. 6 * 7 * Author: Joonyoung Shim <jy0922.shim@samsung.com> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 */ 15 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/completion.h> 19 #include <linux/delay.h> 20 #include <linux/firmware.h> 21 #include <linux/i2c.h> 22 #include <linux/i2c/atmel_mxt_ts.h> 23 #include <linux/input/mt.h> 24 #include <linux/interrupt.h> 25 #include <linux/slab.h> 26 27 /* Version */ 28 #define MXT_VER_20 20 29 #define MXT_VER_21 21 30 #define MXT_VER_22 22 31 32 /* Firmware */ 33 #define MXT_FW_NAME "maxtouch.fw" 34 35 /* Registers */ 36 #define MXT_INFO 0x00 37 #define MXT_FAMILY_ID 0x00 38 #define MXT_VARIANT_ID 0x01 39 #define MXT_VERSION 0x02 40 #define MXT_BUILD 0x03 41 #define MXT_MATRIX_X_SIZE 0x04 42 #define MXT_MATRIX_Y_SIZE 0x05 43 #define MXT_OBJECT_NUM 0x06 44 #define MXT_OBJECT_START 0x07 45 46 #define MXT_OBJECT_SIZE 6 47 48 /* Object types */ 49 #define MXT_DEBUG_DIAGNOSTIC_T37 37 50 #define MXT_GEN_MESSAGE_T5 5 51 #define MXT_GEN_COMMAND_T6 6 52 #define MXT_GEN_POWER_T7 7 53 #define MXT_GEN_ACQUIRE_T8 8 54 #define MXT_GEN_DATASOURCE_T53 53 55 #define MXT_TOUCH_MULTI_T9 9 56 #define MXT_TOUCH_KEYARRAY_T15 15 57 #define MXT_TOUCH_PROXIMITY_T23 23 58 #define MXT_TOUCH_PROXKEY_T52 52 59 #define MXT_PROCI_GRIPFACE_T20 20 60 #define MXT_PROCG_NOISE_T22 22 61 #define MXT_PROCI_ONETOUCH_T24 24 62 #define MXT_PROCI_TWOTOUCH_T27 27 63 #define MXT_PROCI_GRIP_T40 40 64 #define MXT_PROCI_PALM_T41 41 65 #define MXT_PROCI_TOUCHSUPPRESSION_T42 42 66 #define MXT_PROCI_STYLUS_T47 47 67 #define MXT_PROCG_NOISESUPPRESSION_T48 48 68 #define MXT_SPT_COMMSCONFIG_T18 18 69 #define MXT_SPT_GPIOPWM_T19 19 70 #define MXT_SPT_SELFTEST_T25 25 71 #define MXT_SPT_CTECONFIG_T28 28 72 #define MXT_SPT_USERDATA_T38 38 73 #define MXT_SPT_DIGITIZER_T43 43 74 #define MXT_SPT_MESSAGECOUNT_T44 44 75 #define MXT_SPT_CTECONFIG_T46 46 76 77 /* MXT_GEN_COMMAND_T6 field */ 78 #define MXT_COMMAND_RESET 0 79 #define MXT_COMMAND_BACKUPNV 1 80 #define MXT_COMMAND_CALIBRATE 2 81 #define MXT_COMMAND_REPORTALL 3 82 #define MXT_COMMAND_DIAGNOSTIC 5 83 84 /* Define for T6 status byte */ 85 #define MXT_T6_STATUS_RESET (1 << 7) 86 87 /* MXT_GEN_POWER_T7 field */ 88 #define MXT_POWER_IDLEACQINT 0 89 #define MXT_POWER_ACTVACQINT 1 90 #define MXT_POWER_ACTV2IDLETO 2 91 92 /* MXT_GEN_ACQUIRE_T8 field */ 93 #define MXT_ACQUIRE_CHRGTIME 0 94 #define MXT_ACQUIRE_TCHDRIFT 2 95 #define MXT_ACQUIRE_DRIFTST 3 96 #define MXT_ACQUIRE_TCHAUTOCAL 4 97 #define MXT_ACQUIRE_SYNC 5 98 #define MXT_ACQUIRE_ATCHCALST 6 99 #define MXT_ACQUIRE_ATCHCALSTHR 7 100 101 /* MXT_TOUCH_MULTI_T9 field */ 102 #define MXT_TOUCH_CTRL 0 103 #define MXT_T9_ORIENT 9 104 #define MXT_T9_RANGE 18 105 106 /* MXT_TOUCH_MULTI_T9 status */ 107 #define MXT_T9_UNGRIP (1 << 0) 108 #define MXT_T9_SUPPRESS (1 << 1) 109 #define MXT_T9_AMP (1 << 2) 110 #define MXT_T9_VECTOR (1 << 3) 111 #define MXT_T9_MOVE (1 << 4) 112 #define MXT_T9_RELEASE (1 << 5) 113 #define MXT_T9_PRESS (1 << 6) 114 #define MXT_T9_DETECT (1 << 7) 115 116 struct t9_range { 117 u16 x; 118 u16 y; 119 } __packed; 120 121 /* MXT_TOUCH_MULTI_T9 orient */ 122 #define MXT_T9_ORIENT_SWITCH (1 << 0) 123 124 /* MXT_PROCI_GRIPFACE_T20 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_T18 */ 155 #define MXT_COMMS_CTRL 0 156 #define MXT_COMMS_CMD 1 157 158 /* MXT_SPT_CTECONFIG_T28 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_T6 */ 170 #define MXT_BOOT_VALUE 0xa5 171 #define MXT_RESET_VALUE 0x01 172 #define MXT_BACKUP_VALUE 0x55 173 174 /* Delay times */ 175 #define MXT_BACKUP_TIME 50 /* msec */ 176 #define MXT_RESET_TIME 200 /* msec */ 177 #define MXT_RESET_TIMEOUT 3000 /* msec */ 178 #define MXT_CRC_TIMEOUT 1000 /* msec */ 179 #define MXT_FW_RESET_TIME 3000 /* msec */ 180 #define MXT_FW_CHG_TIMEOUT 300 /* msec */ 181 182 /* Command to unlock bootloader */ 183 #define MXT_UNLOCK_CMD_MSB 0xaa 184 #define MXT_UNLOCK_CMD_LSB 0xdc 185 186 /* Bootloader mode status */ 187 #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ 188 #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ 189 #define MXT_FRAME_CRC_CHECK 0x02 190 #define MXT_FRAME_CRC_FAIL 0x03 191 #define MXT_FRAME_CRC_PASS 0x04 192 #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ 193 #define MXT_BOOT_STATUS_MASK 0x3f 194 #define MXT_BOOT_EXTENDED_ID (1 << 5) 195 #define MXT_BOOT_ID_MASK 0x1f 196 197 /* Touchscreen absolute values */ 198 #define MXT_MAX_AREA 0xff 199 200 #define MXT_PIXELS_PER_MM 20 201 202 struct mxt_info { 203 u8 family_id; 204 u8 variant_id; 205 u8 version; 206 u8 build; 207 u8 matrix_xsize; 208 u8 matrix_ysize; 209 u8 object_num; 210 }; 211 212 struct mxt_object { 213 u8 type; 214 u16 start_address; 215 u8 size_minus_one; 216 u8 instances_minus_one; 217 u8 num_report_ids; 218 } __packed; 219 220 struct mxt_message { 221 u8 reportid; 222 u8 message[7]; 223 }; 224 225 /* Each client has this additional data */ 226 struct mxt_data { 227 struct i2c_client *client; 228 struct input_dev *input_dev; 229 char phys[64]; /* device physical location */ 230 const struct mxt_platform_data *pdata; 231 struct mxt_object *object_table; 232 struct mxt_info info; 233 unsigned int irq; 234 unsigned int max_x; 235 unsigned int max_y; 236 bool in_bootloader; 237 u32 config_crc; 238 u8 bootloader_addr; 239 240 /* Cached parameters from object table */ 241 u8 T6_reportid; 242 u16 T6_address; 243 u8 T9_reportid_min; 244 u8 T9_reportid_max; 245 u8 T19_reportid; 246 247 /* for fw update in bootloader */ 248 struct completion bl_completion; 249 250 /* for reset handling */ 251 struct completion reset_completion; 252 253 /* for config update handling */ 254 struct completion crc_completion; 255 }; 256 257 static size_t mxt_obj_size(const struct mxt_object *obj) 258 { 259 return obj->size_minus_one + 1; 260 } 261 262 static size_t mxt_obj_instances(const struct mxt_object *obj) 263 { 264 return obj->instances_minus_one + 1; 265 } 266 267 static bool mxt_object_readable(unsigned int type) 268 { 269 switch (type) { 270 case MXT_GEN_COMMAND_T6: 271 case MXT_GEN_POWER_T7: 272 case MXT_GEN_ACQUIRE_T8: 273 case MXT_GEN_DATASOURCE_T53: 274 case MXT_TOUCH_MULTI_T9: 275 case MXT_TOUCH_KEYARRAY_T15: 276 case MXT_TOUCH_PROXIMITY_T23: 277 case MXT_TOUCH_PROXKEY_T52: 278 case MXT_PROCI_GRIPFACE_T20: 279 case MXT_PROCG_NOISE_T22: 280 case MXT_PROCI_ONETOUCH_T24: 281 case MXT_PROCI_TWOTOUCH_T27: 282 case MXT_PROCI_GRIP_T40: 283 case MXT_PROCI_PALM_T41: 284 case MXT_PROCI_TOUCHSUPPRESSION_T42: 285 case MXT_PROCI_STYLUS_T47: 286 case MXT_PROCG_NOISESUPPRESSION_T48: 287 case MXT_SPT_COMMSCONFIG_T18: 288 case MXT_SPT_GPIOPWM_T19: 289 case MXT_SPT_SELFTEST_T25: 290 case MXT_SPT_CTECONFIG_T28: 291 case MXT_SPT_USERDATA_T38: 292 case MXT_SPT_DIGITIZER_T43: 293 case MXT_SPT_CTECONFIG_T46: 294 return true; 295 default: 296 return false; 297 } 298 } 299 300 static bool mxt_object_writable(unsigned int type) 301 { 302 switch (type) { 303 case MXT_GEN_COMMAND_T6: 304 case MXT_GEN_POWER_T7: 305 case MXT_GEN_ACQUIRE_T8: 306 case MXT_TOUCH_MULTI_T9: 307 case MXT_TOUCH_KEYARRAY_T15: 308 case MXT_TOUCH_PROXIMITY_T23: 309 case MXT_TOUCH_PROXKEY_T52: 310 case MXT_PROCI_GRIPFACE_T20: 311 case MXT_PROCG_NOISE_T22: 312 case MXT_PROCI_ONETOUCH_T24: 313 case MXT_PROCI_TWOTOUCH_T27: 314 case MXT_PROCI_GRIP_T40: 315 case MXT_PROCI_PALM_T41: 316 case MXT_PROCI_TOUCHSUPPRESSION_T42: 317 case MXT_PROCI_STYLUS_T47: 318 case MXT_PROCG_NOISESUPPRESSION_T48: 319 case MXT_SPT_COMMSCONFIG_T18: 320 case MXT_SPT_GPIOPWM_T19: 321 case MXT_SPT_SELFTEST_T25: 322 case MXT_SPT_CTECONFIG_T28: 323 case MXT_SPT_DIGITIZER_T43: 324 case MXT_SPT_CTECONFIG_T46: 325 return true; 326 default: 327 return false; 328 } 329 } 330 331 static void mxt_dump_message(struct device *dev, 332 struct mxt_message *message) 333 { 334 dev_dbg(dev, "reportid: %u\tmessage: %*ph\n", 335 message->reportid, 7, message->message); 336 } 337 338 static int mxt_wait_for_completion(struct mxt_data *data, 339 struct completion *comp, 340 unsigned int timeout_ms) 341 { 342 struct device *dev = &data->client->dev; 343 unsigned long timeout = msecs_to_jiffies(timeout_ms); 344 long ret; 345 346 ret = wait_for_completion_interruptible_timeout(comp, timeout); 347 if (ret < 0) { 348 return ret; 349 } else if (ret == 0) { 350 dev_err(dev, "Wait for completion timed out.\n"); 351 return -ETIMEDOUT; 352 } 353 return 0; 354 } 355 356 static int mxt_bootloader_read(struct mxt_data *data, 357 u8 *val, unsigned int count) 358 { 359 int ret; 360 struct i2c_msg msg; 361 362 msg.addr = data->bootloader_addr; 363 msg.flags = data->client->flags & I2C_M_TEN; 364 msg.flags |= I2C_M_RD; 365 msg.len = count; 366 msg.buf = val; 367 368 ret = i2c_transfer(data->client->adapter, &msg, 1); 369 370 if (ret == 1) { 371 ret = 0; 372 } else { 373 ret = ret < 0 ? ret : -EIO; 374 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n", 375 __func__, ret); 376 } 377 378 return ret; 379 } 380 381 static int mxt_bootloader_write(struct mxt_data *data, 382 const u8 * const val, unsigned int count) 383 { 384 int ret; 385 struct i2c_msg msg; 386 387 msg.addr = data->bootloader_addr; 388 msg.flags = data->client->flags & I2C_M_TEN; 389 msg.len = count; 390 msg.buf = (u8 *)val; 391 392 ret = i2c_transfer(data->client->adapter, &msg, 1); 393 if (ret == 1) { 394 ret = 0; 395 } else { 396 ret = ret < 0 ? ret : -EIO; 397 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n", 398 __func__, ret); 399 } 400 401 return ret; 402 } 403 404 static int mxt_lookup_bootloader_address(struct mxt_data *data) 405 { 406 u8 appmode = data->client->addr; 407 u8 bootloader; 408 409 switch (appmode) { 410 case 0x4a: 411 case 0x4b: 412 case 0x4c: 413 case 0x4d: 414 case 0x5a: 415 case 0x5b: 416 bootloader = appmode - 0x26; 417 break; 418 default: 419 dev_err(&data->client->dev, 420 "Appmode i2c address 0x%02x not found\n", 421 appmode); 422 return -EINVAL; 423 } 424 425 data->bootloader_addr = bootloader; 426 return 0; 427 } 428 429 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val) 430 { 431 struct device *dev = &data->client->dev; 432 u8 buf[3]; 433 434 if (val & MXT_BOOT_EXTENDED_ID) { 435 if (mxt_bootloader_read(data, &buf[0], 3) != 0) { 436 dev_err(dev, "%s: i2c failure\n", __func__); 437 return val; 438 } 439 440 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]); 441 442 return buf[0]; 443 } else { 444 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK); 445 446 return val; 447 } 448 } 449 450 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state) 451 { 452 struct device *dev = &data->client->dev; 453 u8 val; 454 int ret; 455 456 recheck: 457 if (state != MXT_WAITING_BOOTLOAD_CMD) { 458 /* 459 * In application update mode, the interrupt 460 * line signals state transitions. We must wait for the 461 * CHG assertion before reading the status byte. 462 * Once the status byte has been read, the line is deasserted. 463 */ 464 ret = mxt_wait_for_completion(data, &data->bl_completion, 465 MXT_FW_CHG_TIMEOUT); 466 if (ret) { 467 /* 468 * TODO: handle -ERESTARTSYS better by terminating 469 * fw update process before returning to userspace 470 * by writing length 0x000 to device (iff we are in 471 * WAITING_FRAME_DATA state). 472 */ 473 dev_err(dev, "Update wait error %d\n", ret); 474 return ret; 475 } 476 } 477 478 ret = mxt_bootloader_read(data, &val, 1); 479 if (ret) 480 return ret; 481 482 if (state == MXT_WAITING_BOOTLOAD_CMD) 483 val = mxt_get_bootloader_version(data, val); 484 485 switch (state) { 486 case MXT_WAITING_BOOTLOAD_CMD: 487 case MXT_WAITING_FRAME_DATA: 488 val &= ~MXT_BOOT_STATUS_MASK; 489 break; 490 case MXT_FRAME_CRC_PASS: 491 if (val == MXT_FRAME_CRC_CHECK) { 492 goto recheck; 493 } else if (val == MXT_FRAME_CRC_FAIL) { 494 dev_err(dev, "Bootloader CRC fail\n"); 495 return -EINVAL; 496 } 497 break; 498 default: 499 return -EINVAL; 500 } 501 502 if (val != state) { 503 dev_err(dev, "Invalid bootloader state %02X != %02X\n", 504 val, state); 505 return -EINVAL; 506 } 507 508 return 0; 509 } 510 511 static int mxt_unlock_bootloader(struct mxt_data *data) 512 { 513 int ret; 514 u8 buf[2]; 515 516 buf[0] = MXT_UNLOCK_CMD_LSB; 517 buf[1] = MXT_UNLOCK_CMD_MSB; 518 519 ret = mxt_bootloader_write(data, buf, 2); 520 if (ret) 521 return ret; 522 523 return 0; 524 } 525 526 static int __mxt_read_reg(struct i2c_client *client, 527 u16 reg, u16 len, void *val) 528 { 529 struct i2c_msg xfer[2]; 530 u8 buf[2]; 531 int ret; 532 533 buf[0] = reg & 0xff; 534 buf[1] = (reg >> 8) & 0xff; 535 536 /* Write register */ 537 xfer[0].addr = client->addr; 538 xfer[0].flags = 0; 539 xfer[0].len = 2; 540 xfer[0].buf = buf; 541 542 /* Read data */ 543 xfer[1].addr = client->addr; 544 xfer[1].flags = I2C_M_RD; 545 xfer[1].len = len; 546 xfer[1].buf = val; 547 548 ret = i2c_transfer(client->adapter, xfer, 2); 549 if (ret == 2) { 550 ret = 0; 551 } else { 552 if (ret >= 0) 553 ret = -EIO; 554 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n", 555 __func__, ret); 556 } 557 558 return ret; 559 } 560 561 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, 562 const void *val) 563 { 564 u8 *buf; 565 size_t count; 566 int ret; 567 568 count = len + 2; 569 buf = kmalloc(count, GFP_KERNEL); 570 if (!buf) 571 return -ENOMEM; 572 573 buf[0] = reg & 0xff; 574 buf[1] = (reg >> 8) & 0xff; 575 memcpy(&buf[2], val, len); 576 577 ret = i2c_master_send(client, buf, count); 578 if (ret == count) { 579 ret = 0; 580 } else { 581 if (ret >= 0) 582 ret = -EIO; 583 dev_err(&client->dev, "%s: i2c send failed (%d)\n", 584 __func__, ret); 585 } 586 587 kfree(buf); 588 return ret; 589 } 590 591 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) 592 { 593 return __mxt_write_reg(client, reg, 1, &val); 594 } 595 596 static struct mxt_object * 597 mxt_get_object(struct mxt_data *data, u8 type) 598 { 599 struct mxt_object *object; 600 int i; 601 602 for (i = 0; i < data->info.object_num; i++) { 603 object = data->object_table + i; 604 if (object->type == type) 605 return object; 606 } 607 608 dev_err(&data->client->dev, "Invalid object type T%u\n", type); 609 return NULL; 610 } 611 612 static int mxt_read_message(struct mxt_data *data, 613 struct mxt_message *message) 614 { 615 struct mxt_object *object; 616 u16 reg; 617 618 object = mxt_get_object(data, MXT_GEN_MESSAGE_T5); 619 if (!object) 620 return -EINVAL; 621 622 reg = object->start_address; 623 return __mxt_read_reg(data->client, reg, 624 sizeof(struct mxt_message), message); 625 } 626 627 static int mxt_write_object(struct mxt_data *data, 628 u8 type, u8 offset, u8 val) 629 { 630 struct mxt_object *object; 631 u16 reg; 632 633 object = mxt_get_object(data, type); 634 if (!object || offset >= mxt_obj_size(object)) 635 return -EINVAL; 636 637 reg = object->start_address; 638 return mxt_write_reg(data->client, reg + offset, val); 639 } 640 641 static void mxt_input_button(struct mxt_data *data, struct mxt_message *message) 642 { 643 struct input_dev *input = data->input_dev; 644 const struct mxt_platform_data *pdata = data->pdata; 645 bool button; 646 int i; 647 648 /* Active-low switch */ 649 for (i = 0; i < pdata->t19_num_keys; i++) { 650 if (pdata->t19_keymap[i] == KEY_RESERVED) 651 continue; 652 button = !(message->message[0] & (1 << i)); 653 input_report_key(input, pdata->t19_keymap[i], button); 654 } 655 } 656 657 static void mxt_input_sync(struct input_dev *input_dev) 658 { 659 input_mt_report_pointer_emulation(input_dev, false); 660 input_sync(input_dev); 661 } 662 663 static void mxt_input_touchevent(struct mxt_data *data, 664 struct mxt_message *message, int id) 665 { 666 struct device *dev = &data->client->dev; 667 u8 status = message->message[0]; 668 struct input_dev *input_dev = data->input_dev; 669 int x; 670 int y; 671 int area; 672 int amplitude; 673 674 x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf); 675 y = (message->message[2] << 4) | ((message->message[3] & 0xf)); 676 677 /* Handle 10/12 bit switching */ 678 if (data->max_x < 1024) 679 x >>= 2; 680 if (data->max_y < 1024) 681 y >>= 2; 682 683 area = message->message[4]; 684 amplitude = message->message[5]; 685 686 dev_dbg(dev, 687 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n", 688 id, 689 (status & MXT_T9_DETECT) ? 'D' : '.', 690 (status & MXT_T9_PRESS) ? 'P' : '.', 691 (status & MXT_T9_RELEASE) ? 'R' : '.', 692 (status & MXT_T9_MOVE) ? 'M' : '.', 693 (status & MXT_T9_VECTOR) ? 'V' : '.', 694 (status & MXT_T9_AMP) ? 'A' : '.', 695 (status & MXT_T9_SUPPRESS) ? 'S' : '.', 696 (status & MXT_T9_UNGRIP) ? 'U' : '.', 697 x, y, area, amplitude); 698 699 input_mt_slot(input_dev, id); 700 701 if (status & MXT_T9_DETECT) { 702 /* 703 * Multiple bits may be set if the host is slow to read 704 * the status messages, indicating all the events that 705 * have happened. 706 */ 707 if (status & MXT_T9_RELEASE) { 708 input_mt_report_slot_state(input_dev, 709 MT_TOOL_FINGER, 0); 710 mxt_input_sync(input_dev); 711 } 712 713 /* Touch active */ 714 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1); 715 input_report_abs(input_dev, ABS_MT_POSITION_X, x); 716 input_report_abs(input_dev, ABS_MT_POSITION_Y, y); 717 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude); 718 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area); 719 } else { 720 /* Touch no longer active, close out slot */ 721 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0); 722 } 723 } 724 725 static u16 mxt_extract_T6_csum(const u8 *csum) 726 { 727 return csum[0] | (csum[1] << 8) | (csum[2] << 16); 728 } 729 730 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg) 731 { 732 u8 id = msg->reportid; 733 return (id >= data->T9_reportid_min && id <= data->T9_reportid_max); 734 } 735 736 static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data) 737 { 738 struct mxt_message message; 739 const u8 *payload = &message.message[0]; 740 struct device *dev = &data->client->dev; 741 u8 reportid; 742 bool update_input = false; 743 u32 crc; 744 745 do { 746 if (mxt_read_message(data, &message)) { 747 dev_err(dev, "Failed to read message\n"); 748 return IRQ_NONE; 749 } 750 751 reportid = message.reportid; 752 753 if (reportid == data->T6_reportid) { 754 u8 status = payload[0]; 755 756 crc = mxt_extract_T6_csum(&payload[1]); 757 if (crc != data->config_crc) { 758 data->config_crc = crc; 759 complete(&data->crc_completion); 760 } 761 762 dev_dbg(dev, "Status: %02x Config Checksum: %06x\n", 763 status, data->config_crc); 764 765 if (status & MXT_T6_STATUS_RESET) 766 complete(&data->reset_completion); 767 } else if (mxt_is_T9_message(data, &message)) { 768 int id = reportid - data->T9_reportid_min; 769 mxt_input_touchevent(data, &message, id); 770 update_input = true; 771 } else if (message.reportid == data->T19_reportid) { 772 mxt_input_button(data, &message); 773 update_input = true; 774 } else { 775 mxt_dump_message(dev, &message); 776 } 777 } while (reportid != 0xff); 778 779 if (update_input) 780 mxt_input_sync(data->input_dev); 781 782 return IRQ_HANDLED; 783 } 784 785 static irqreturn_t mxt_interrupt(int irq, void *dev_id) 786 { 787 struct mxt_data *data = dev_id; 788 789 if (data->in_bootloader) { 790 /* bootloader state transition completion */ 791 complete(&data->bl_completion); 792 return IRQ_HANDLED; 793 } 794 795 return mxt_process_messages_until_invalid(data); 796 } 797 798 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, 799 u8 value, bool wait) 800 { 801 u16 reg; 802 u8 command_register; 803 int timeout_counter = 0; 804 int ret; 805 806 reg = data->T6_address + cmd_offset; 807 808 ret = mxt_write_reg(data->client, reg, value); 809 if (ret) 810 return ret; 811 812 if (!wait) 813 return 0; 814 815 do { 816 msleep(20); 817 ret = __mxt_read_reg(data->client, reg, 1, &command_register); 818 if (ret) 819 return ret; 820 } while (command_register != 0 && timeout_counter++ <= 100); 821 822 if (timeout_counter > 100) { 823 dev_err(&data->client->dev, "Command failed!\n"); 824 return -EIO; 825 } 826 827 return 0; 828 } 829 830 static int mxt_soft_reset(struct mxt_data *data) 831 { 832 struct device *dev = &data->client->dev; 833 int ret = 0; 834 835 dev_info(dev, "Resetting chip\n"); 836 837 reinit_completion(&data->reset_completion); 838 839 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false); 840 if (ret) 841 return ret; 842 843 ret = mxt_wait_for_completion(data, &data->reset_completion, 844 MXT_RESET_TIMEOUT); 845 if (ret) 846 return ret; 847 848 return 0; 849 } 850 851 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value) 852 { 853 /* 854 * On failure, CRC is set to 0 and config will always be 855 * downloaded. 856 */ 857 data->config_crc = 0; 858 reinit_completion(&data->crc_completion); 859 860 mxt_t6_command(data, cmd, value, true); 861 862 /* 863 * Wait for crc message. On failure, CRC is set to 0 and config will 864 * always be downloaded. 865 */ 866 mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT); 867 } 868 869 static int mxt_check_reg_init(struct mxt_data *data) 870 { 871 const struct mxt_platform_data *pdata = data->pdata; 872 struct mxt_object *object; 873 struct device *dev = &data->client->dev; 874 int index = 0; 875 int i, size; 876 int ret; 877 878 if (!pdata->config) { 879 dev_dbg(dev, "No cfg data defined, skipping reg init\n"); 880 return 0; 881 } 882 883 mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1); 884 885 if (data->config_crc == pdata->config_crc) { 886 dev_info(dev, "Config CRC 0x%06X: OK\n", data->config_crc); 887 return 0; 888 } 889 890 dev_info(dev, "Config CRC 0x%06X: does not match 0x%06X\n", 891 data->config_crc, pdata->config_crc); 892 893 for (i = 0; i < data->info.object_num; i++) { 894 object = data->object_table + i; 895 896 if (!mxt_object_writable(object->type)) 897 continue; 898 899 size = mxt_obj_size(object) * mxt_obj_instances(object); 900 if (index + size > pdata->config_length) { 901 dev_err(dev, "Not enough config data!\n"); 902 return -EINVAL; 903 } 904 905 ret = __mxt_write_reg(data->client, object->start_address, 906 size, &pdata->config[index]); 907 if (ret) 908 return ret; 909 index += size; 910 } 911 912 mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); 913 914 ret = mxt_soft_reset(data); 915 if (ret) 916 return ret; 917 918 dev_info(dev, "Config successfully updated\n"); 919 920 return 0; 921 } 922 923 static int mxt_make_highchg(struct mxt_data *data) 924 { 925 struct device *dev = &data->client->dev; 926 struct mxt_message message; 927 int count = 10; 928 int error; 929 930 /* Read dummy message to make high CHG pin */ 931 do { 932 error = mxt_read_message(data, &message); 933 if (error) 934 return error; 935 } while (message.reportid != 0xff && --count); 936 937 if (!count) { 938 dev_err(dev, "CHG pin isn't cleared\n"); 939 return -EBUSY; 940 } 941 942 return 0; 943 } 944 945 static int mxt_get_info(struct mxt_data *data) 946 { 947 struct i2c_client *client = data->client; 948 struct mxt_info *info = &data->info; 949 int error; 950 951 /* Read 7-byte info block starting at address 0 */ 952 error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info); 953 if (error) 954 return error; 955 956 return 0; 957 } 958 959 static int mxt_get_object_table(struct mxt_data *data) 960 { 961 struct i2c_client *client = data->client; 962 size_t table_size; 963 int error; 964 int i; 965 u8 reportid; 966 967 table_size = data->info.object_num * sizeof(struct mxt_object); 968 error = __mxt_read_reg(client, MXT_OBJECT_START, table_size, 969 data->object_table); 970 if (error) 971 return error; 972 973 /* Valid Report IDs start counting from 1 */ 974 reportid = 1; 975 for (i = 0; i < data->info.object_num; i++) { 976 struct mxt_object *object = data->object_table + i; 977 u8 min_id, max_id; 978 979 le16_to_cpus(&object->start_address); 980 981 if (object->num_report_ids) { 982 min_id = reportid; 983 reportid += object->num_report_ids * 984 mxt_obj_instances(object); 985 max_id = reportid - 1; 986 } else { 987 min_id = 0; 988 max_id = 0; 989 } 990 991 dev_dbg(&data->client->dev, 992 "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n", 993 object->type, object->start_address, 994 mxt_obj_size(object), mxt_obj_instances(object), 995 min_id, max_id); 996 997 switch (object->type) { 998 case MXT_GEN_COMMAND_T6: 999 data->T6_reportid = min_id; 1000 data->T6_address = object->start_address; 1001 break; 1002 case MXT_TOUCH_MULTI_T9: 1003 data->T9_reportid_min = min_id; 1004 data->T9_reportid_max = max_id; 1005 break; 1006 case MXT_SPT_GPIOPWM_T19: 1007 data->T19_reportid = min_id; 1008 break; 1009 } 1010 } 1011 1012 return 0; 1013 } 1014 1015 static void mxt_free_object_table(struct mxt_data *data) 1016 { 1017 kfree(data->object_table); 1018 data->object_table = NULL; 1019 data->T6_reportid = 0; 1020 data->T9_reportid_min = 0; 1021 data->T9_reportid_max = 0; 1022 data->T19_reportid = 0; 1023 } 1024 1025 static int mxt_read_t9_resolution(struct mxt_data *data) 1026 { 1027 struct i2c_client *client = data->client; 1028 int error; 1029 struct t9_range range; 1030 unsigned char orient; 1031 struct mxt_object *object; 1032 1033 object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); 1034 if (!object) 1035 return -EINVAL; 1036 1037 error = __mxt_read_reg(client, 1038 object->start_address + MXT_T9_RANGE, 1039 sizeof(range), &range); 1040 if (error) 1041 return error; 1042 1043 le16_to_cpus(&range.x); 1044 le16_to_cpus(&range.y); 1045 1046 error = __mxt_read_reg(client, 1047 object->start_address + MXT_T9_ORIENT, 1048 1, &orient); 1049 if (error) 1050 return error; 1051 1052 /* Handle default values */ 1053 if (range.x == 0) 1054 range.x = 1023; 1055 1056 if (range.y == 0) 1057 range.y = 1023; 1058 1059 if (orient & MXT_T9_ORIENT_SWITCH) { 1060 data->max_x = range.y; 1061 data->max_y = range.x; 1062 } else { 1063 data->max_x = range.x; 1064 data->max_y = range.y; 1065 } 1066 1067 dev_dbg(&client->dev, 1068 "Touchscreen size X%uY%u\n", data->max_x, data->max_y); 1069 1070 return 0; 1071 } 1072 1073 static int mxt_initialize(struct mxt_data *data) 1074 { 1075 struct i2c_client *client = data->client; 1076 struct mxt_info *info = &data->info; 1077 int error; 1078 1079 error = mxt_get_info(data); 1080 if (error) 1081 return error; 1082 1083 data->object_table = kcalloc(info->object_num, 1084 sizeof(struct mxt_object), 1085 GFP_KERNEL); 1086 if (!data->object_table) { 1087 dev_err(&client->dev, "Failed to allocate memory\n"); 1088 return -ENOMEM; 1089 } 1090 1091 /* Get object table information */ 1092 error = mxt_get_object_table(data); 1093 if (error) { 1094 dev_err(&client->dev, "Error %d reading object table\n", error); 1095 goto err_free_object_table; 1096 } 1097 1098 /* Check register init values */ 1099 error = mxt_check_reg_init(data); 1100 if (error) { 1101 dev_err(&client->dev, "Error %d initializing configuration\n", 1102 error); 1103 goto err_free_object_table; 1104 } 1105 1106 error = mxt_read_t9_resolution(data); 1107 if (error) { 1108 dev_err(&client->dev, "Failed to initialize T9 resolution\n"); 1109 goto err_free_object_table; 1110 } 1111 1112 dev_info(&client->dev, 1113 "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n", 1114 info->family_id, info->variant_id, info->version >> 4, 1115 info->version & 0xf, info->build, info->object_num); 1116 1117 return 0; 1118 1119 err_free_object_table: 1120 mxt_free_object_table(data); 1121 return error; 1122 } 1123 1124 /* Firmware Version is returned as Major.Minor.Build */ 1125 static ssize_t mxt_fw_version_show(struct device *dev, 1126 struct device_attribute *attr, char *buf) 1127 { 1128 struct mxt_data *data = dev_get_drvdata(dev); 1129 struct mxt_info *info = &data->info; 1130 return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n", 1131 info->version >> 4, info->version & 0xf, info->build); 1132 } 1133 1134 /* Hardware Version is returned as FamilyID.VariantID */ 1135 static ssize_t mxt_hw_version_show(struct device *dev, 1136 struct device_attribute *attr, char *buf) 1137 { 1138 struct mxt_data *data = dev_get_drvdata(dev); 1139 struct mxt_info *info = &data->info; 1140 return scnprintf(buf, PAGE_SIZE, "%u.%u\n", 1141 info->family_id, info->variant_id); 1142 } 1143 1144 static ssize_t mxt_show_instance(char *buf, int count, 1145 struct mxt_object *object, int instance, 1146 const u8 *val) 1147 { 1148 int i; 1149 1150 if (mxt_obj_instances(object) > 1) 1151 count += scnprintf(buf + count, PAGE_SIZE - count, 1152 "Instance %u\n", instance); 1153 1154 for (i = 0; i < mxt_obj_size(object); i++) 1155 count += scnprintf(buf + count, PAGE_SIZE - count, 1156 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]); 1157 count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); 1158 1159 return count; 1160 } 1161 1162 static ssize_t mxt_object_show(struct device *dev, 1163 struct device_attribute *attr, char *buf) 1164 { 1165 struct mxt_data *data = dev_get_drvdata(dev); 1166 struct mxt_object *object; 1167 int count = 0; 1168 int i, j; 1169 int error; 1170 u8 *obuf; 1171 1172 /* Pre-allocate buffer large enough to hold max sized object. */ 1173 obuf = kmalloc(256, GFP_KERNEL); 1174 if (!obuf) 1175 return -ENOMEM; 1176 1177 error = 0; 1178 for (i = 0; i < data->info.object_num; i++) { 1179 object = data->object_table + i; 1180 1181 if (!mxt_object_readable(object->type)) 1182 continue; 1183 1184 count += scnprintf(buf + count, PAGE_SIZE - count, 1185 "T%u:\n", object->type); 1186 1187 for (j = 0; j < mxt_obj_instances(object); j++) { 1188 u16 size = mxt_obj_size(object); 1189 u16 addr = object->start_address + j * size; 1190 1191 error = __mxt_read_reg(data->client, addr, size, obuf); 1192 if (error) 1193 goto done; 1194 1195 count = mxt_show_instance(buf, count, object, j, obuf); 1196 } 1197 } 1198 1199 done: 1200 kfree(obuf); 1201 return error ?: count; 1202 } 1203 1204 static int mxt_check_firmware_format(struct device *dev, 1205 const struct firmware *fw) 1206 { 1207 unsigned int pos = 0; 1208 char c; 1209 1210 while (pos < fw->size) { 1211 c = *(fw->data + pos); 1212 1213 if (c < '0' || (c > '9' && c < 'A') || c > 'F') 1214 return 0; 1215 1216 pos++; 1217 } 1218 1219 /* 1220 * To convert file try: 1221 * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw 1222 */ 1223 dev_err(dev, "Aborting: firmware file must be in binary format\n"); 1224 1225 return -EINVAL; 1226 } 1227 1228 static int mxt_load_fw(struct device *dev, const char *fn) 1229 { 1230 struct mxt_data *data = dev_get_drvdata(dev); 1231 const struct firmware *fw = NULL; 1232 unsigned int frame_size; 1233 unsigned int pos = 0; 1234 unsigned int retry = 0; 1235 unsigned int frame = 0; 1236 int ret; 1237 1238 ret = request_firmware(&fw, fn, dev); 1239 if (ret) { 1240 dev_err(dev, "Unable to open firmware %s\n", fn); 1241 return ret; 1242 } 1243 1244 /* Check for incorrect enc file */ 1245 ret = mxt_check_firmware_format(dev, fw); 1246 if (ret) 1247 goto release_firmware; 1248 1249 ret = mxt_lookup_bootloader_address(data); 1250 if (ret) 1251 goto release_firmware; 1252 1253 /* Change to the bootloader mode */ 1254 data->in_bootloader = true; 1255 1256 ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_BOOT_VALUE, false); 1257 if (ret) 1258 goto release_firmware; 1259 1260 msleep(MXT_RESET_TIME); 1261 1262 reinit_completion(&data->bl_completion); 1263 1264 ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD); 1265 if (ret) 1266 goto disable_irq; 1267 1268 /* Unlock bootloader */ 1269 mxt_unlock_bootloader(data); 1270 1271 while (pos < fw->size) { 1272 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA); 1273 if (ret) 1274 goto disable_irq; 1275 1276 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); 1277 1278 /* Take account of CRC bytes */ 1279 frame_size += 2; 1280 1281 /* Write one frame to device */ 1282 ret = mxt_bootloader_write(data, fw->data + pos, frame_size); 1283 if (ret) 1284 goto disable_irq; 1285 1286 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS); 1287 if (ret) { 1288 retry++; 1289 1290 /* Back off by 20ms per retry */ 1291 msleep(retry * 20); 1292 1293 if (retry > 20) { 1294 dev_err(dev, "Retry count exceeded\n"); 1295 goto disable_irq; 1296 } 1297 } else { 1298 retry = 0; 1299 pos += frame_size; 1300 frame++; 1301 } 1302 1303 if (frame % 50 == 0) 1304 dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n", 1305 frame, pos, fw->size); 1306 } 1307 1308 /* Wait for flash. */ 1309 ret = mxt_wait_for_completion(data, &data->bl_completion, 1310 MXT_FW_RESET_TIME); 1311 if (ret) 1312 goto disable_irq; 1313 1314 dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos); 1315 1316 /* 1317 * Wait for device to reset. Some bootloader versions do not assert 1318 * the CHG line after bootloading has finished, so ignore potential 1319 * errors. 1320 */ 1321 mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME); 1322 1323 data->in_bootloader = false; 1324 1325 disable_irq: 1326 disable_irq(data->irq); 1327 release_firmware: 1328 release_firmware(fw); 1329 return ret; 1330 } 1331 1332 static ssize_t mxt_update_fw_store(struct device *dev, 1333 struct device_attribute *attr, 1334 const char *buf, size_t count) 1335 { 1336 struct mxt_data *data = dev_get_drvdata(dev); 1337 int error; 1338 1339 error = mxt_load_fw(dev, MXT_FW_NAME); 1340 if (error) { 1341 dev_err(dev, "The firmware update failed(%d)\n", error); 1342 count = error; 1343 } else { 1344 dev_info(dev, "The firmware update succeeded\n"); 1345 1346 mxt_free_object_table(data); 1347 1348 mxt_initialize(data); 1349 1350 enable_irq(data->irq); 1351 1352 error = mxt_make_highchg(data); 1353 if (error) 1354 return error; 1355 } 1356 1357 return count; 1358 } 1359 1360 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); 1361 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); 1362 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); 1363 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); 1364 1365 static struct attribute *mxt_attrs[] = { 1366 &dev_attr_fw_version.attr, 1367 &dev_attr_hw_version.attr, 1368 &dev_attr_object.attr, 1369 &dev_attr_update_fw.attr, 1370 NULL 1371 }; 1372 1373 static const struct attribute_group mxt_attr_group = { 1374 .attrs = mxt_attrs, 1375 }; 1376 1377 static void mxt_start(struct mxt_data *data) 1378 { 1379 /* Touch enable */ 1380 mxt_write_object(data, 1381 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0x83); 1382 } 1383 1384 static void mxt_stop(struct mxt_data *data) 1385 { 1386 /* Touch disable */ 1387 mxt_write_object(data, 1388 MXT_TOUCH_MULTI_T9, MXT_TOUCH_CTRL, 0); 1389 } 1390 1391 static int mxt_input_open(struct input_dev *dev) 1392 { 1393 struct mxt_data *data = input_get_drvdata(dev); 1394 1395 mxt_start(data); 1396 1397 return 0; 1398 } 1399 1400 static void mxt_input_close(struct input_dev *dev) 1401 { 1402 struct mxt_data *data = input_get_drvdata(dev); 1403 1404 mxt_stop(data); 1405 } 1406 1407 static int mxt_probe(struct i2c_client *client, 1408 const struct i2c_device_id *id) 1409 { 1410 const struct mxt_platform_data *pdata = dev_get_platdata(&client->dev); 1411 struct mxt_data *data; 1412 struct input_dev *input_dev; 1413 int error; 1414 unsigned int num_mt_slots; 1415 unsigned int mt_flags = 0; 1416 int i; 1417 1418 if (!pdata) 1419 return -EINVAL; 1420 1421 data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL); 1422 input_dev = input_allocate_device(); 1423 if (!data || !input_dev) { 1424 dev_err(&client->dev, "Failed to allocate memory\n"); 1425 error = -ENOMEM; 1426 goto err_free_mem; 1427 } 1428 1429 input_dev->name = "Atmel maXTouch Touchscreen"; 1430 snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0", 1431 client->adapter->nr, client->addr); 1432 1433 input_dev->phys = data->phys; 1434 1435 input_dev->id.bustype = BUS_I2C; 1436 input_dev->dev.parent = &client->dev; 1437 input_dev->open = mxt_input_open; 1438 input_dev->close = mxt_input_close; 1439 1440 data->client = client; 1441 data->input_dev = input_dev; 1442 data->pdata = pdata; 1443 data->irq = client->irq; 1444 1445 init_completion(&data->bl_completion); 1446 init_completion(&data->reset_completion); 1447 init_completion(&data->crc_completion); 1448 1449 error = mxt_initialize(data); 1450 if (error) 1451 goto err_free_mem; 1452 1453 __set_bit(EV_ABS, input_dev->evbit); 1454 __set_bit(EV_KEY, input_dev->evbit); 1455 __set_bit(BTN_TOUCH, input_dev->keybit); 1456 1457 if (pdata->t19_num_keys) { 1458 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); 1459 1460 for (i = 0; i < pdata->t19_num_keys; i++) 1461 if (pdata->t19_keymap[i] != KEY_RESERVED) 1462 input_set_capability(input_dev, EV_KEY, 1463 pdata->t19_keymap[i]); 1464 1465 mt_flags |= INPUT_MT_POINTER; 1466 1467 input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); 1468 input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); 1469 input_abs_set_res(input_dev, ABS_MT_POSITION_X, 1470 MXT_PIXELS_PER_MM); 1471 input_abs_set_res(input_dev, ABS_MT_POSITION_Y, 1472 MXT_PIXELS_PER_MM); 1473 1474 input_dev->name = "Atmel maXTouch Touchpad"; 1475 } 1476 1477 /* For single touch */ 1478 input_set_abs_params(input_dev, ABS_X, 1479 0, data->max_x, 0, 0); 1480 input_set_abs_params(input_dev, ABS_Y, 1481 0, data->max_y, 0, 0); 1482 input_set_abs_params(input_dev, ABS_PRESSURE, 1483 0, 255, 0, 0); 1484 1485 /* For multi touch */ 1486 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; 1487 error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); 1488 if (error) 1489 goto err_free_object; 1490 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 1491 0, MXT_MAX_AREA, 0, 0); 1492 input_set_abs_params(input_dev, ABS_MT_POSITION_X, 1493 0, data->max_x, 0, 0); 1494 input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 1495 0, data->max_y, 0, 0); 1496 input_set_abs_params(input_dev, ABS_MT_PRESSURE, 1497 0, 255, 0, 0); 1498 1499 input_set_drvdata(input_dev, data); 1500 i2c_set_clientdata(client, data); 1501 1502 error = request_threaded_irq(client->irq, NULL, mxt_interrupt, 1503 pdata->irqflags | IRQF_ONESHOT, 1504 client->name, data); 1505 if (error) { 1506 dev_err(&client->dev, "Failed to register interrupt\n"); 1507 goto err_free_object; 1508 } 1509 1510 error = mxt_make_highchg(data); 1511 if (error) 1512 goto err_free_irq; 1513 1514 error = input_register_device(input_dev); 1515 if (error) { 1516 dev_err(&client->dev, "Error %d registering input device\n", 1517 error); 1518 goto err_free_irq; 1519 } 1520 1521 error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); 1522 if (error) { 1523 dev_err(&client->dev, "Failure %d creating sysfs group\n", 1524 error); 1525 goto err_unregister_device; 1526 } 1527 1528 return 0; 1529 1530 err_unregister_device: 1531 input_unregister_device(input_dev); 1532 input_dev = NULL; 1533 err_free_irq: 1534 free_irq(client->irq, data); 1535 err_free_object: 1536 kfree(data->object_table); 1537 err_free_mem: 1538 input_free_device(input_dev); 1539 kfree(data); 1540 return error; 1541 } 1542 1543 static int mxt_remove(struct i2c_client *client) 1544 { 1545 struct mxt_data *data = i2c_get_clientdata(client); 1546 1547 sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); 1548 free_irq(data->irq, data); 1549 input_unregister_device(data->input_dev); 1550 kfree(data->object_table); 1551 kfree(data); 1552 1553 return 0; 1554 } 1555 1556 #ifdef CONFIG_PM_SLEEP 1557 static int mxt_suspend(struct device *dev) 1558 { 1559 struct i2c_client *client = to_i2c_client(dev); 1560 struct mxt_data *data = i2c_get_clientdata(client); 1561 struct input_dev *input_dev = data->input_dev; 1562 1563 mutex_lock(&input_dev->mutex); 1564 1565 if (input_dev->users) 1566 mxt_stop(data); 1567 1568 mutex_unlock(&input_dev->mutex); 1569 1570 return 0; 1571 } 1572 1573 static int mxt_resume(struct device *dev) 1574 { 1575 struct i2c_client *client = to_i2c_client(dev); 1576 struct mxt_data *data = i2c_get_clientdata(client); 1577 struct input_dev *input_dev = data->input_dev; 1578 1579 mxt_soft_reset(data); 1580 1581 mutex_lock(&input_dev->mutex); 1582 1583 if (input_dev->users) 1584 mxt_start(data); 1585 1586 mutex_unlock(&input_dev->mutex); 1587 1588 return 0; 1589 } 1590 #endif 1591 1592 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); 1593 1594 static const struct i2c_device_id mxt_id[] = { 1595 { "qt602240_ts", 0 }, 1596 { "atmel_mxt_ts", 0 }, 1597 { "atmel_mxt_tp", 0 }, 1598 { "mXT224", 0 }, 1599 { } 1600 }; 1601 MODULE_DEVICE_TABLE(i2c, mxt_id); 1602 1603 static struct i2c_driver mxt_driver = { 1604 .driver = { 1605 .name = "atmel_mxt_ts", 1606 .owner = THIS_MODULE, 1607 .pm = &mxt_pm_ops, 1608 }, 1609 .probe = mxt_probe, 1610 .remove = mxt_remove, 1611 .id_table = mxt_id, 1612 }; 1613 1614 module_i2c_driver(mxt_driver); 1615 1616 /* Module information */ 1617 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); 1618 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver"); 1619 MODULE_LICENSE("GPL"); 1620