drivers/input/touchscreen/atmel_mxt_ts.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Atmel maXTouch Touchscreen driver
   4  *
   5  * Copyright (C) 2010 Samsung Electronics Co.Ltd
   6  * Copyright (C) 2011-2014 Atmel Corporation
   7  * Copyright (C) 2012 Google, Inc.
   8  * Copyright (C) 2016 Zodiac Inflight Innovations
   9  *
  10  * Author: Joonyoung Shim <[email protected]>
  11  */
  12
  13 #include <linux/acpi.h>
  14 #include <linux/dmi.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/completion.h>
  18 #include <linux/delay.h>
  19 #include <linux/firmware.h>
  20 #include <linux/i2c.h>
  21 #include <linux/input/mt.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/irq.h>
  24 #include <linux/of.h>
  25 #include <linux/property.h>
  26 #include <linux/slab.h>
  27 #include <linux/regulator/consumer.h>
  28 #include <linux/gpio/consumer.h>
  29 #include <asm/unaligned.h>
  30 #include <media/v4l2-device.h>
  31 #include <media/v4l2-ioctl.h>
  32 #include <media/videobuf2-v4l2.h>
  33 #include <media/videobuf2-vmalloc.h>
  34 #include <dt-bindings/input/atmel-maxtouch.h>
  35
  36 /* Firmware files */
  37 #define MXT_FW_NAME             "maxtouch.fw"
  38 #define MXT_CFG_NAME            "maxtouch.cfg"
  39 #define MXT_CFG_MAGIC           "OBP_RAW V1"
  40
  41 /* Registers */
  42 #define MXT_OBJECT_START        0x07
  43 #define MXT_OBJECT_SIZE         6
  44 #define MXT_INFO_CHECKSUM_SIZE  3
  45 #define MXT_MAX_BLOCK_WRITE     256
  46
  47 /* Object types */
  48 #define MXT_DEBUG_DIAGNOSTIC_T37        37
  49 #define MXT_GEN_MESSAGE_T5              5
  50 #define MXT_GEN_COMMAND_T6              6
  51 #define MXT_GEN_POWER_T7                7
  52 #define MXT_GEN_ACQUIRE_T8              8
  53 #define MXT_GEN_DATASOURCE_T53          53
  54 #define MXT_TOUCH_MULTI_T9              9
  55 #define MXT_TOUCH_KEYARRAY_T15          15
  56 #define MXT_TOUCH_PROXIMITY_T23         23
  57 #define MXT_TOUCH_PROXKEY_T52           52
  58 #define MXT_PROCI_GRIPFACE_T20          20
  59 #define MXT_PROCG_NOISE_T22             22
  60 #define MXT_PROCI_ONETOUCH_T24          24
  61 #define MXT_PROCI_TWOTOUCH_T27          27
  62 #define MXT_PROCI_GRIP_T40              40
  63 #define MXT_PROCI_PALM_T41              41
  64 #define MXT_PROCI_TOUCHSUPPRESSION_T42  42
  65 #define MXT_PROCI_STYLUS_T47            47
  66 #define MXT_PROCG_NOISESUPPRESSION_T48  48
  67 #define MXT_SPT_COMMSCONFIG_T18         18
  68 #define MXT_SPT_GPIOPWM_T19             19
  69 #define MXT_SPT_SELFTEST_T25            25
  70 #define MXT_SPT_CTECONFIG_T28           28
  71 #define MXT_SPT_USERDATA_T38            38
  72 #define MXT_SPT_DIGITIZER_T43           43
  73 #define MXT_SPT_MESSAGECOUNT_T44        44
  74 #define MXT_SPT_CTECONFIG_T46           46
  75 #define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71
  76 #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100
  77
  78 /* MXT_GEN_MESSAGE_T5 object */
  79 #define MXT_RPTID_NOMSG         0xff
  80
  81 /* MXT_GEN_COMMAND_T6 field */
  82 #define MXT_COMMAND_RESET       0
  83 #define MXT_COMMAND_BACKUPNV    1
  84 #define MXT_COMMAND_CALIBRATE   2
  85 #define MXT_COMMAND_REPORTALL   3
  86 #define MXT_COMMAND_DIAGNOSTIC  5
  87
  88 /* Define for T6 status byte */
  89 #define MXT_T6_STATUS_RESET     BIT(7)
  90 #define MXT_T6_STATUS_OFL       BIT(6)
  91 #define MXT_T6_STATUS_SIGERR    BIT(5)
  92 #define MXT_T6_STATUS_CAL       BIT(4)
  93 #define MXT_T6_STATUS_CFGERR    BIT(3)
  94 #define MXT_T6_STATUS_COMSERR   BIT(2)
  95
  96 /* MXT_GEN_POWER_T7 field */
  97 struct t7_config {
  98         u8 idle;
  99         u8 active;
 100 } __packed;
 101
 102 #define MXT_POWER_CFG_RUN               0
 103 #define MXT_POWER_CFG_DEEPSLEEP         1
 104
 105 /* MXT_TOUCH_MULTI_T9 field */
 106 #define MXT_T9_CTRL             0
 107 #define MXT_T9_XSIZE            3
 108 #define MXT_T9_YSIZE            4
 109 #define MXT_T9_ORIENT           9
 110 #define MXT_T9_RANGE            18
 111
 112 /* MXT_TOUCH_MULTI_T9 status */
 113 #define MXT_T9_UNGRIP           BIT(0)
 114 #define MXT_T9_SUPPRESS         BIT(1)
 115 #define MXT_T9_AMP              BIT(2)
 116 #define MXT_T9_VECTOR           BIT(3)
 117 #define MXT_T9_MOVE             BIT(4)
 118 #define MXT_T9_RELEASE          BIT(5)
 119 #define MXT_T9_PRESS            BIT(6)
 120 #define MXT_T9_DETECT           BIT(7)
 121
 122 struct t9_range {
 123         __le16 x;
 124         __le16 y;
 125 } __packed;
 126
 127 /* MXT_TOUCH_MULTI_T9 orient */
 128 #define MXT_T9_ORIENT_SWITCH    BIT(0)
 129 #define MXT_T9_ORIENT_INVERTX   BIT(1)
 130 #define MXT_T9_ORIENT_INVERTY   BIT(2)
 131
 132 /* MXT_SPT_COMMSCONFIG_T18 */
 133 #define MXT_COMMS_CTRL          0
 134 #define MXT_COMMS_CMD           1
 135 #define MXT_COMMS_RETRIGEN      BIT(6)
 136
 137 /* MXT_DEBUG_DIAGNOSTIC_T37 */
 138 #define MXT_DIAGNOSTIC_PAGEUP   0x01
 139 #define MXT_DIAGNOSTIC_DELTAS   0x10
 140 #define MXT_DIAGNOSTIC_REFS     0x11
 141 #define MXT_DIAGNOSTIC_SIZE     128
 142
 143 #define MXT_FAMILY_1386                 160
 144 #define MXT1386_COLUMNS                 3
 145 #define MXT1386_PAGES_PER_COLUMN        8
 146
 147 struct t37_debug {
 148 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
 149         u8 mode;
 150         u8 page;
 151         u8 data[MXT_DIAGNOSTIC_SIZE];
 152 #endif
 153 };
 154
 155 /* Define for MXT_GEN_COMMAND_T6 */
 156 #define MXT_BOOT_VALUE          0xa5
 157 #define MXT_RESET_VALUE         0x01
 158 #define MXT_BACKUP_VALUE        0x55
 159
 160 /* T100 Multiple Touch Touchscreen */
 161 #define MXT_T100_CTRL           0
 162 #define MXT_T100_CFG1           1
 163 #define MXT_T100_TCHAUX         3
 164 #define MXT_T100_XSIZE          9
 165 #define MXT_T100_XRANGE         13
 166 #define MXT_T100_YSIZE          20
 167 #define MXT_T100_YRANGE         24
 168
 169 #define MXT_T100_CFG_SWITCHXY   BIT(5)
 170 #define MXT_T100_CFG_INVERTY    BIT(6)
 171 #define MXT_T100_CFG_INVERTX    BIT(7)
 172
 173 #define MXT_T100_TCHAUX_VECT    BIT(0)
 174 #define MXT_T100_TCHAUX_AMPL    BIT(1)
 175 #define MXT_T100_TCHAUX_AREA    BIT(2)
 176
 177 #define MXT_T100_DETECT         BIT(7)
 178 #define MXT_T100_TYPE_MASK      0x70
 179
 180 enum t100_type {
 181         MXT_T100_TYPE_FINGER            = 1,
 182         MXT_T100_TYPE_PASSIVE_STYLUS    = 2,
 183         MXT_T100_TYPE_HOVERING_FINGER   = 4,
 184         MXT_T100_TYPE_GLOVE             = 5,
 185         MXT_T100_TYPE_LARGE_TOUCH       = 6,
 186 };
 187
 188 #define MXT_DISTANCE_ACTIVE_TOUCH       0
 189 #define MXT_DISTANCE_HOVERING           1
 190
 191 #define MXT_TOUCH_MAJOR_DEFAULT         1
 192 #define MXT_PRESSURE_DEFAULT            1
 193
 194 /* Delay times */
 195 #define MXT_BACKUP_TIME         50      /* msec */
 196 #define MXT_RESET_GPIO_TIME     20      /* msec */
 197 #define MXT_RESET_INVALID_CHG   100     /* msec */
 198 #define MXT_RESET_TIME          200     /* msec */
 199 #define MXT_RESET_TIMEOUT       3000    /* msec */
 200 #define MXT_CRC_TIMEOUT         1000    /* msec */
 201 #define MXT_FW_RESET_TIME       3000    /* msec */
 202 #define MXT_FW_CHG_TIMEOUT      300     /* msec */
 203 #define MXT_WAKEUP_TIME         25      /* msec */
 204
 205 /* Command to unlock bootloader */
 206 #define MXT_UNLOCK_CMD_MSB      0xaa
 207 #define MXT_UNLOCK_CMD_LSB      0xdc
 208
 209 /* Bootloader mode status */
 210 #define MXT_WAITING_BOOTLOAD_CMD        0xc0    /* valid 7 6 bit only */
 211 #define MXT_WAITING_FRAME_DATA  0x80    /* valid 7 6 bit only */
 212 #define MXT_FRAME_CRC_CHECK     0x02
 213 #define MXT_FRAME_CRC_FAIL      0x03
 214 #define MXT_FRAME_CRC_PASS      0x04
 215 #define MXT_APP_CRC_FAIL        0x40    /* valid 7 8 bit only */
 216 #define MXT_BOOT_STATUS_MASK    0x3f
 217 #define MXT_BOOT_EXTENDED_ID    BIT(5)
 218 #define MXT_BOOT_ID_MASK        0x1f
 219
 220 /* Touchscreen absolute values */
 221 #define MXT_MAX_AREA            0xff
 222
 223 #define MXT_PIXELS_PER_MM       20
 224
 225 struct mxt_info {
 226         u8 family_id;
 227         u8 variant_id;
 228         u8 version;
 229         u8 build;
 230         u8 matrix_xsize;
 231         u8 matrix_ysize;
 232         u8 object_num;
 233 };
 234
 235 struct mxt_object {
 236         u8 type;
 237         u16 start_address;
 238         u8 size_minus_one;
 239         u8 instances_minus_one;
 240         u8 num_report_ids;
 241 } __packed;
 242
 243 struct mxt_dbg {
 244         u16 t37_address;
 245         u16 diag_cmd_address;
 246         struct t37_debug *t37_buf;
 247         unsigned int t37_pages;
 248         unsigned int t37_nodes;
 249
 250         struct v4l2_device v4l2;
 251         struct v4l2_pix_format format;
 252         struct video_device vdev;
 253         struct vb2_queue queue;
 254         struct mutex lock;
 255         int input;
 256 };
 257
 258 enum v4l_dbg_inputs {
 259         MXT_V4L_INPUT_DELTAS,
 260         MXT_V4L_INPUT_REFS,
 261         MXT_V4L_INPUT_MAX,
 262 };
 263
 264 enum mxt_suspend_mode {
 265         MXT_SUSPEND_DEEP_SLEEP  = 0,
 266         MXT_SUSPEND_T9_CTRL     = 1,
 267 };
 268
 269 /* Config update context */
 270 struct mxt_cfg {
 271         u8 *raw;
 272         size_t raw_size;
 273         off_t raw_pos;
 274
 275         u8 *mem;
 276         size_t mem_size;
 277         int start_ofs;
 278
 279         struct mxt_info info;
 280 };
 281
 282 /* Each client has this additional data */
 283 struct mxt_data {
 284         struct i2c_client *client;
 285         struct input_dev *input_dev;
 286         char phys[64];          /* device physical location */
 287         struct mxt_object *object_table;
 288         struct mxt_info *info;
 289         void *raw_info_block;
 290         unsigned int irq;
 291         unsigned int max_x;
 292         unsigned int max_y;
 293         bool invertx;
 294         bool inverty;
 295         bool xy_switch;
 296         u8 xsize;
 297         u8 ysize;
 298         bool in_bootloader;
 299         u16 mem_size;
 300         u8 t100_aux_ampl;
 301         u8 t100_aux_area;
 302         u8 t100_aux_vect;
 303         u8 max_reportid;
 304         u32 config_crc;
 305         u32 info_crc;
 306         u8 bootloader_addr;
 307         u8 *msg_buf;
 308         u8 t6_status;
 309         bool update_input;
 310         u8 last_message_count;
 311         u8 num_touchids;
 312         u8 multitouch;
 313         struct t7_config t7_cfg;
 314         struct mxt_dbg dbg;
 315         struct regulator_bulk_data regulators[2];
 316         struct gpio_desc *reset_gpio;
 317         struct gpio_desc *wake_gpio;
 318         bool use_retrigen_workaround;
 319
 320         /* Cached parameters from object table */
 321         u16 T5_address;
 322         u8 T5_msg_size;
 323         u8 T6_reportid;
 324         u16 T6_address;
 325         u16 T7_address;
 326         u16 T71_address;
 327         u8 T9_reportid_min;
 328         u8 T9_reportid_max;
 329         u16 T18_address;
 330         u8 T19_reportid;
 331         u16 T44_address;
 332         u8 T100_reportid_min;
 333         u8 T100_reportid_max;
 334
 335         /* for fw update in bootloader */
 336         struct completion bl_completion;
 337
 338         /* for reset handling */
 339         struct completion reset_completion;
 340
 341         /* for config update handling */
 342         struct completion crc_completion;
 343
 344         u32 *t19_keymap;
 345         unsigned int t19_num_keys;
 346
 347         enum mxt_suspend_mode suspend_mode;
 348
 349         u32 wakeup_method;
 350 };
 351
 352 struct mxt_vb2_buffer {
 353         struct vb2_buffer       vb;
 354         struct list_head        list;
 355 };
 356
 357 static size_t mxt_obj_size(const struct mxt_object *obj)
 358 {
 359         return obj->size_minus_one + 1;
 360 }
 361
 362 static size_t mxt_obj_instances(const struct mxt_object *obj)
 363 {
 364         return obj->instances_minus_one + 1;
 365 }
 366
 367 static bool mxt_object_readable(unsigned int type)
 368 {
 369         switch (type) {
 370         case MXT_GEN_COMMAND_T6:
 371         case MXT_GEN_POWER_T7:
 372         case MXT_GEN_ACQUIRE_T8:
 373         case MXT_GEN_DATASOURCE_T53:
 374         case MXT_TOUCH_MULTI_T9:
 375         case MXT_TOUCH_KEYARRAY_T15:
 376         case MXT_TOUCH_PROXIMITY_T23:
 377         case MXT_TOUCH_PROXKEY_T52:
 378         case MXT_TOUCH_MULTITOUCHSCREEN_T100:
 379         case MXT_PROCI_GRIPFACE_T20:
 380         case MXT_PROCG_NOISE_T22:
 381         case MXT_PROCI_ONETOUCH_T24:
 382         case MXT_PROCI_TWOTOUCH_T27:
 383         case MXT_PROCI_GRIP_T40:
 384         case MXT_PROCI_PALM_T41:
 385         case MXT_PROCI_TOUCHSUPPRESSION_T42:
 386         case MXT_PROCI_STYLUS_T47:
 387         case MXT_PROCG_NOISESUPPRESSION_T48:
 388         case MXT_SPT_COMMSCONFIG_T18:
 389         case MXT_SPT_GPIOPWM_T19:
 390         case MXT_SPT_SELFTEST_T25:
 391         case MXT_SPT_CTECONFIG_T28:
 392         case MXT_SPT_USERDATA_T38:
 393         case MXT_SPT_DIGITIZER_T43:
 394         case MXT_SPT_CTECONFIG_T46:
 395         case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
 396                 return true;
 397         default:
 398                 return false;
 399         }
 400 }
 401
 402 static void mxt_dump_message(struct mxt_data *data, u8 *message)
 403 {
 404         dev_dbg(&data->client->dev, "message: %*ph\n",
 405                 data->T5_msg_size, message);
 406 }
 407
 408 static int mxt_wait_for_completion(struct mxt_data *data,
 409                                    struct completion *comp,
 410                                    unsigned int timeout_ms)
 411 {
 412         struct device *dev = &data->client->dev;
 413         unsigned long timeout = msecs_to_jiffies(timeout_ms);
 414         long ret;
 415
 416         ret = wait_for_completion_interruptible_timeout(comp, timeout);
 417         if (ret < 0) {
 418                 return ret;
 419         } else if (ret == 0) {
 420                 dev_err(dev, "Wait for completion timed out.\n");
 421                 return -ETIMEDOUT;
 422         }
 423         return 0;
 424 }
 425
 426 static int mxt_bootloader_read(struct mxt_data *data,
 427                                u8 *val, unsigned int count)
 428 {
 429         int ret;
 430         struct i2c_msg msg;
 431
 432         msg.addr = data->bootloader_addr;
 433         msg.flags = data->client->flags & I2C_M_TEN;
 434         msg.flags |= I2C_M_RD;
 435         msg.len = count;
 436         msg.buf = val;
 437
 438         ret = i2c_transfer(data->client->adapter, &msg, 1);
 439         if (ret == 1) {
 440                 ret = 0;
 441         } else {
 442                 ret = ret < 0 ? ret : -EIO;
 443                 dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n",
 444                         __func__, ret);
 445         }
 446
 447         return ret;
 448 }
 449
 450 static int mxt_bootloader_write(struct mxt_data *data,
 451                                 const u8 * const val, unsigned int count)
 452 {
 453         int ret;
 454         struct i2c_msg msg;
 455
 456         msg.addr = data->bootloader_addr;
 457         msg.flags = data->client->flags & I2C_M_TEN;
 458         msg.len = count;
 459         msg.buf = (u8 *)val;
 460
 461         ret = i2c_transfer(data->client->adapter, &msg, 1);
 462         if (ret == 1) {
 463                 ret = 0;
 464         } else {
 465                 ret = ret < 0 ? ret : -EIO;
 466                 dev_err(&data->client->dev, "%s: i2c send failed (%d)\n",
 467                         __func__, ret);
 468         }
 469
 470         return ret;
 471 }
 472
 473 static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
 474 {
 475         u8 appmode = data->client->addr;
 476         u8 bootloader;
 477         u8 family_id = data->info ? data->info->family_id : 0;
 478
 479         switch (appmode) {
 480         case 0x4a:
 481         case 0x4b:
 482                 /* Chips after 1664S use different scheme */
 483                 if (retry || family_id >= 0xa2) {
 484                         bootloader = appmode - 0x24;
 485                         break;
 486                 }
 487                 fallthrough;    /* for normal case */
 488         case 0x4c:
 489         case 0x4d:
 490         case 0x5a:
 491         case 0x5b:
 492                 bootloader = appmode - 0x26;
 493                 break;
 494
 495         default:
 496                 dev_err(&data->client->dev,
 497                         "Appmode i2c address 0x%02x not found\n",
 498                         appmode);
 499                 return -EINVAL;
 500         }
 501
 502         data->bootloader_addr = bootloader;
 503         return 0;
 504 }
 505
 506 static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address)
 507 {
 508         struct device *dev = &data->client->dev;
 509         int error;
 510         u8 val;
 511         bool crc_failure;
 512
 513         error = mxt_lookup_bootloader_address(data, alt_address);
 514         if (error)
 515                 return error;
 516
 517         error = mxt_bootloader_read(data, &val, 1);
 518         if (error)
 519                 return error;
 520
 521         /* Check app crc fail mode */
 522         crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL;
 523
 524         dev_err(dev, "Detected bootloader, status:%02X%s\n",
 525                         val, crc_failure ? ", APP_CRC_FAIL" : "");
 526
 527         return 0;
 528 }
 529
 530 static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val)
 531 {
 532         struct device *dev = &data->client->dev;
 533         u8 buf[3];
 534
 535         if (val & MXT_BOOT_EXTENDED_ID) {
 536                 if (mxt_bootloader_read(data, &buf[0], 3) != 0) {
 537                         dev_err(dev, "%s: i2c failure\n", __func__);
 538                         return val;
 539                 }
 540
 541                 dev_dbg(dev, "Bootloader ID:%d Version:%d\n", buf[1], buf[2]);
 542
 543                 return buf[0];
 544         } else {
 545                 dev_dbg(dev, "Bootloader ID:%d\n", val & MXT_BOOT_ID_MASK);
 546
 547                 return val;
 548         }
 549 }
 550
 551 static int mxt_check_bootloader(struct mxt_data *data, unsigned int state,
 552                                 bool wait)
 553 {
 554         struct device *dev = &data->client->dev;
 555         u8 val;
 556         int ret;
 557
 558 recheck:
 559         if (wait) {
 560                 /*
 561                  * In application update mode, the interrupt
 562                  * line signals state transitions. We must wait for the
 563                  * CHG assertion before reading the status byte.
 564                  * Once the status byte has been read, the line is deasserted.
 565                  */
 566                 ret = mxt_wait_for_completion(data, &data->bl_completion,
 567                                               MXT_FW_CHG_TIMEOUT);
 568                 if (ret) {
 569                         /*
 570                          * TODO: handle -ERESTARTSYS better by terminating
 571                          * fw update process before returning to userspace
 572                          * by writing length 0x000 to device (iff we are in
 573                          * WAITING_FRAME_DATA state).
 574                          */
 575                         dev_err(dev, "Update wait error %d\n", ret);
 576                         return ret;
 577                 }
 578         }
 579
 580         ret = mxt_bootloader_read(data, &val, 1);
 581         if (ret)
 582                 return ret;
 583
 584         if (state == MXT_WAITING_BOOTLOAD_CMD)
 585                 val = mxt_get_bootloader_version(data, val);
 586
 587         switch (state) {
 588         case MXT_WAITING_BOOTLOAD_CMD:
 589         case MXT_WAITING_FRAME_DATA:
 590         case MXT_APP_CRC_FAIL:
 591                 val &= ~MXT_BOOT_STATUS_MASK;
 592                 break;
 593         case MXT_FRAME_CRC_PASS:
 594                 if (val == MXT_FRAME_CRC_CHECK) {
 595                         goto recheck;
 596                 } else if (val == MXT_FRAME_CRC_FAIL) {
 597                         dev_err(dev, "Bootloader CRC fail\n");
 598                         return -EINVAL;
 599                 }
 600                 break;
 601         default:
 602                 return -EINVAL;
 603         }
 604
 605         if (val != state) {
 606                 dev_err(dev, "Invalid bootloader state %02X != %02X\n",
 607                         val, state);
 608                 return -EINVAL;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock)
 615 {
 616         u8 buf[2];
 617
 618         if (unlock) {
 619                 buf[0] = MXT_UNLOCK_CMD_LSB;
 620                 buf[1] = MXT_UNLOCK_CMD_MSB;
 621         } else {
 622                 buf[0] = 0x01;
 623                 buf[1] = 0x01;
 624         }
 625
 626         return mxt_bootloader_write(data, buf, sizeof(buf));
 627 }
 628
 629 static bool mxt_wakeup_toggle(struct i2c_client *client,
 630                               bool wake_up, bool in_i2c)
 631 {
 632         struct mxt_data *data = i2c_get_clientdata(client);
 633
 634         switch (data->wakeup_method) {
 635         case ATMEL_MXT_WAKEUP_I2C_SCL:
 636                 if (!in_i2c)
 637                         return false;
 638                 break;
 639
 640         case ATMEL_MXT_WAKEUP_GPIO:
 641                 if (in_i2c)
 642                         return false;
 643
 644                 gpiod_set_value(data->wake_gpio, wake_up);
 645                 break;
 646
 647         default:
 648                 return false;
 649         }
 650
 651         if (wake_up) {
 652                 dev_dbg(&client->dev, "waking up controller\n");
 653
 654                 msleep(MXT_WAKEUP_TIME);
 655         }
 656
 657         return true;
 658 }
 659
 660 static int __mxt_read_reg(struct i2c_client *client,
 661                                u16 reg, u16 len, void *val)
 662 {
 663         struct i2c_msg xfer[2];
 664         bool retried = false;
 665         u8 buf[2];
 666         int ret;
 667
 668         buf[0] = reg & 0xff;
 669         buf[1] = (reg >> 8) & 0xff;
 670
 671         /* Write register */
 672         xfer[0].addr = client->addr;
 673         xfer[0].flags = 0;
 674         xfer[0].len = 2;
 675         xfer[0].buf = buf;
 676
 677         /* Read data */
 678         xfer[1].addr = client->addr;
 679         xfer[1].flags = I2C_M_RD;
 680         xfer[1].len = len;
 681         xfer[1].buf = val;
 682
 683 retry:
 684         ret = i2c_transfer(client->adapter, xfer, 2);
 685         if (ret == 2) {
 686                 ret = 0;
 687         } else if (!retried && mxt_wakeup_toggle(client, true, true)) {
 688                 retried = true;
 689                 goto retry;
 690         } else {
 691                 if (ret >= 0)
 692                         ret = -EIO;
 693                 dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
 694                         __func__, ret);
 695         }
 696
 697         return ret;
 698 }
 699
 700 static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len,
 701                            const void *val)
 702 {
 703         bool retried = false;
 704         u8 *buf;
 705         size_t count;
 706         int ret;
 707
 708         count = len + 2;
 709         buf = kmalloc(count, GFP_KERNEL);
 710         if (!buf)
 711                 return -ENOMEM;
 712
 713         buf[0] = reg & 0xff;
 714         buf[1] = (reg >> 8) & 0xff;
 715         memcpy(&buf[2], val, len);
 716
 717 retry:
 718         ret = i2c_master_send(client, buf, count);
 719         if (ret == count) {
 720                 ret = 0;
 721         } else if (!retried && mxt_wakeup_toggle(client, true, true)) {
 722                 retried = true;
 723                 goto retry;
 724         } else {
 725                 if (ret >= 0)
 726                         ret = -EIO;
 727                 dev_err(&client->dev, "%s: i2c send failed (%d)\n",
 728                         __func__, ret);
 729         }
 730
 731         kfree(buf);
 732         return ret;
 733 }
 734
 735 static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
 736 {
 737         return __mxt_write_reg(client, reg, 1, &val);
 738 }
 739
 740 static struct mxt_object *
 741 mxt_get_object(struct mxt_data *data, u8 type)
 742 {
 743         struct mxt_object *object;
 744         int i;
 745
 746         for (i = 0; i < data->info->object_num; i++) {
 747                 object = data->object_table + i;
 748                 if (object->type == type)
 749                         return object;
 750         }
 751
 752         dev_warn(&data->client->dev, "Invalid object type T%u\n", type);
 753         return NULL;
 754 }
 755
 756 static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg)
 757 {
 758         struct device *dev = &data->client->dev;
 759         u8 status = msg[1];
 760         u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16);
 761
 762         if (crc != data->config_crc) {
 763                 data->config_crc = crc;
 764                 dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc);
 765         }
 766
 767         complete(&data->crc_completion);
 768
 769         /* Detect reset */
 770         if (status & MXT_T6_STATUS_RESET)
 771                 complete(&data->reset_completion);
 772
 773         /* Output debug if status has changed */
 774         if (status != data->t6_status)
 775                 dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n",
 776                         status,
 777                         status == 0 ? " OK" : "",
 778                         status & MXT_T6_STATUS_RESET ? " RESET" : "",
 779                         status & MXT_T6_STATUS_OFL ? " OFL" : "",
 780                         status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "",
 781                         status & MXT_T6_STATUS_CAL ? " CAL" : "",
 782                         status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "",
 783                         status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "");
 784
 785         /* Save current status */
 786         data->t6_status = status;
 787 }
 788
 789 static int mxt_write_object(struct mxt_data *data,
 790                                  u8 type, u8 offset, u8 val)
 791 {
 792         struct mxt_object *object;
 793         u16 reg;
 794
 795         object = mxt_get_object(data, type);
 796         if (!object || offset >= mxt_obj_size(object))
 797                 return -EINVAL;
 798
 799         reg = object->start_address;
 800         return mxt_write_reg(data->client, reg + offset, val);
 801 }
 802
 803 static void mxt_input_button(struct mxt_data *data, u8 *message)
 804 {
 805         struct input_dev *input = data->input_dev;
 806         int i;
 807
 808         for (i = 0; i < data->t19_num_keys; i++) {
 809                 if (data->t19_keymap[i] == KEY_RESERVED)
 810                         continue;
 811
 812                 /* Active-low switch */
 813                 input_report_key(input, data->t19_keymap[i],
 814                                  !(message[1] & BIT(i)));
 815         }
 816 }
 817
 818 static void mxt_input_sync(struct mxt_data *data)
 819 {
 820         input_mt_report_pointer_emulation(data->input_dev,
 821                                           data->t19_num_keys);
 822         input_sync(data->input_dev);
 823 }
 824
 825 static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 826 {
 827         struct device *dev = &data->client->dev;
 828         struct input_dev *input_dev = data->input_dev;
 829         int id;
 830         u8 status;
 831         int x;
 832         int y;
 833         int area;
 834         int amplitude;
 835
 836         id = message[0] - data->T9_reportid_min;
 837         status = message[1];
 838         x = (message[2] << 4) | ((message[4] >> 4) & 0xf);
 839         y = (message[3] << 4) | ((message[4] & 0xf));
 840
 841         /* Handle 10/12 bit switching */
 842         if (data->max_x < 1024)
 843                 x >>= 2;
 844         if (data->max_y < 1024)
 845                 y >>= 2;
 846
 847         area = message[5];
 848         amplitude = message[6];
 849
 850         dev_dbg(dev,
 851                 "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
 852                 id,
 853                 (status & MXT_T9_DETECT) ? 'D' : '.',
 854                 (status & MXT_T9_PRESS) ? 'P' : '.',
 855                 (status & MXT_T9_RELEASE) ? 'R' : '.',
 856                 (status & MXT_T9_MOVE) ? 'M' : '.',
 857                 (status & MXT_T9_VECTOR) ? 'V' : '.',
 858                 (status & MXT_T9_AMP) ? 'A' : '.',
 859                 (status & MXT_T9_SUPPRESS) ? 'S' : '.',
 860                 (status & MXT_T9_UNGRIP) ? 'U' : '.',
 861                 x, y, area, amplitude);
 862
 863         input_mt_slot(input_dev, id);
 864
 865         if (status & MXT_T9_DETECT) {
 866                 /*
 867                  * Multiple bits may be set if the host is slow to read
 868                  * the status messages, indicating all the events that
 869                  * have happened.
 870                  */
 871                 if (status & MXT_T9_RELEASE) {
 872                         input_mt_report_slot_inactive(input_dev);
 873                         mxt_input_sync(data);
 874                 }
 875
 876                 /* if active, pressure must be non-zero */
 877                 if (!amplitude)
 878                         amplitude = MXT_PRESSURE_DEFAULT;
 879
 880                 /* Touch active */
 881                 input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
 882                 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
 883                 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 884                 input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
 885                 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
 886         } else {
 887                 /* Touch no longer active, close out slot */
 888                 input_mt_report_slot_inactive(input_dev);
 889         }
 890
 891         data->update_input = true;
 892 }
 893
 894 static void mxt_proc_t100_message(struct mxt_data *data, u8 *message)
 895 {
 896         struct device *dev = &data->client->dev;
 897         struct input_dev *input_dev = data->input_dev;
 898         int id;
 899         u8 status;
 900         u8 type = 0;
 901         u16 x;
 902         u16 y;
 903         int distance = 0;
 904         int tool = 0;
 905         u8 major = 0;
 906         u8 pressure = 0;
 907         u8 orientation = 0;
 908
 909         id = message[0] - data->T100_reportid_min - 2;
 910
 911         /* ignore SCRSTATUS events */
 912         if (id < 0)
 913                 return;
 914
 915         status = message[1];
 916         x = get_unaligned_le16(&message[2]);
 917         y = get_unaligned_le16(&message[4]);
 918
 919         if (status & MXT_T100_DETECT) {
 920                 type = (status & MXT_T100_TYPE_MASK) >> 4;
 921
 922                 switch (type) {
 923                 case MXT_T100_TYPE_HOVERING_FINGER:
 924                         tool = MT_TOOL_FINGER;
 925                         distance = MXT_DISTANCE_HOVERING;
 926
 927                         if (data->t100_aux_vect)
 928                                 orientation = message[data->t100_aux_vect];
 929
 930                         break;
 931
 932                 case MXT_T100_TYPE_FINGER:
 933                 case MXT_T100_TYPE_GLOVE:
 934                         tool = MT_TOOL_FINGER;
 935                         distance = MXT_DISTANCE_ACTIVE_TOUCH;
 936
 937                         if (data->t100_aux_area)
 938                                 major = message[data->t100_aux_area];
 939
 940                         if (data->t100_aux_ampl)
 941                                 pressure = message[data->t100_aux_ampl];
 942
 943                         if (data->t100_aux_vect)
 944                                 orientation = message[data->t100_aux_vect];
 945
 946                         break;
 947
 948                 case MXT_T100_TYPE_PASSIVE_STYLUS:
 949                         tool = MT_TOOL_PEN;
 950
 951                         /*
 952                          * Passive stylus is reported with size zero so
 953                          * hardcode.
 954                          */
 955                         major = MXT_TOUCH_MAJOR_DEFAULT;
 956
 957                         if (data->t100_aux_ampl)
 958                                 pressure = message[data->t100_aux_ampl];
 959
 960                         break;
 961
 962                 case MXT_T100_TYPE_LARGE_TOUCH:
 963                         /* Ignore suppressed touch */
 964                         break;
 965
 966                 default:
 967                         dev_dbg(dev, "Unexpected T100 type\n");
 968                         return;
 969                 }
 970         }
 971
 972         /*
 973          * Values reported should be non-zero if tool is touching the
 974          * device
 975          */
 976         if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER)
 977                 pressure = MXT_PRESSURE_DEFAULT;
 978
 979         input_mt_slot(input_dev, id);
 980
 981         if (status & MXT_T100_DETECT) {
 982                 dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n",
 983                         id, type, x, y, major, pressure, orientation);
 984
 985                 input_mt_report_slot_state(input_dev, tool, 1);
 986                 input_report_abs(input_dev, ABS_MT_POSITION_X, x);
 987                 input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 988                 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major);
 989                 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
 990                 input_report_abs(input_dev, ABS_MT_DISTANCE, distance);
 991                 input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation);
 992         } else {
 993                 dev_dbg(dev, "[%u] release\n", id);
 994
 995                 /* close out slot */
 996                 input_mt_report_slot_inactive(input_dev);
 997         }
 998
 999         data->update_input = true;
1000 }
1001
1002 static int mxt_proc_message(struct mxt_data *data, u8 *message)
1003 {
1004         u8 report_id = message[0];
1005
1006         if (report_id == MXT_RPTID_NOMSG)
1007                 return 0;
1008
1009         if (report_id == data->T6_reportid) {
1010                 mxt_proc_t6_messages(data, message);
1011         } else if (!data->input_dev) {
1012                 /*
1013                  * Do not report events if input device
1014                  * is not yet registered.
1015                  */
1016                 mxt_dump_message(data, message);
1017         } else if (report_id >= data->T9_reportid_min &&
1018                    report_id <= data->T9_reportid_max) {
1019                 mxt_proc_t9_message(data, message);
1020         } else if (report_id >= data->T100_reportid_min &&
1021                    report_id <= data->T100_reportid_max) {
1022                 mxt_proc_t100_message(data, message);
1023         } else if (report_id == data->T19_reportid) {
1024                 mxt_input_button(data, message);
1025                 data->update_input = true;
1026         } else {
1027                 mxt_dump_message(data, message);
1028         }
1029
1030         return 1;
1031 }
1032
1033 static int mxt_read_and_process_messages(struct mxt_data *data, u8 count)
1034 {
1035         struct device *dev = &data->client->dev;
1036         int ret;
1037         int i;
1038         u8 num_valid = 0;
1039
1040         /* Safety check for msg_buf */
1041         if (count > data->max_reportid)
1042                 return -EINVAL;
1043
1044         /* Process remaining messages if necessary */
1045         ret = __mxt_read_reg(data->client, data->T5_address,
1046                                 data->T5_msg_size * count, data->msg_buf);
1047         if (ret) {
1048                 dev_err(dev, "Failed to read %u messages (%d)\n", count, ret);
1049                 return ret;
1050         }
1051
1052         for (i = 0;  i < count; i++) {
1053                 ret = mxt_proc_message(data,
1054                         data->msg_buf + data->T5_msg_size * i);
1055
1056                 if (ret == 1)
1057                         num_valid++;
1058         }
1059
1060         /* return number of messages read */
1061         return num_valid;
1062 }
1063
1064 static irqreturn_t mxt_process_messages_t44(struct mxt_data *data)
1065 {
1066         struct device *dev = &data->client->dev;
1067         int ret;
1068         u8 count, num_left;
1069
1070         /* Read T44 and T5 together */
1071         ret = __mxt_read_reg(data->client, data->T44_address,
1072                 data->T5_msg_size + 1, data->msg_buf);
1073         if (ret) {
1074                 dev_err(dev, "Failed to read T44 and T5 (%d)\n", ret);
1075                 return IRQ_NONE;
1076         }
1077
1078         count = data->msg_buf[0];
1079
1080         /*
1081          * This condition may be caused by the CHG line being configured in
1082          * Mode 0. It results in unnecessary I2C operations but it is benign.
1083          */
1084         if (count == 0)
1085                 return IRQ_NONE;
1086
1087         if (count > data->max_reportid) {
1088                 dev_warn(dev, "T44 count %d exceeded max report id\n", count);
1089                 count = data->max_reportid;
1090         }
1091
1092         /* Process first message */
1093         ret = mxt_proc_message(data, data->msg_buf + 1);
1094         if (ret < 0) {
1095                 dev_warn(dev, "Unexpected invalid message\n");
1096                 return IRQ_NONE;
1097         }
1098
1099         num_left = count - 1;
1100
1101         /* Process remaining messages if necessary */
1102         if (num_left) {
1103                 ret = mxt_read_and_process_messages(data, num_left);
1104                 if (ret < 0)
1105                         goto end;
1106                 else if (ret != num_left)
1107                         dev_warn(dev, "Unexpected invalid message\n");
1108         }
1109
1110 end:
1111         if (data->update_input) {
1112                 mxt_input_sync(data);
1113                 data->update_input = false;
1114         }
1115
1116         return IRQ_HANDLED;
1117 }
1118
1119 static int mxt_process_messages_until_invalid(struct mxt_data *data)
1120 {
1121         struct device *dev = &data->client->dev;
1122         int count, read;
1123         u8 tries = 2;
1124
1125         count = data->max_reportid;
1126
1127         /* Read messages until we force an invalid */
1128         do {
1129                 read = mxt_read_and_process_messages(data, count);
1130                 if (read < count)
1131                         return 0;
1132         } while (--tries);
1133
1134         if (data->update_input) {
1135                 mxt_input_sync(data);
1136                 data->update_input = false;
1137         }
1138
1139         dev_err(dev, "CHG pin isn't cleared\n");
1140         return -EBUSY;
1141 }
1142
1143 static irqreturn_t mxt_process_messages(struct mxt_data *data)
1144 {
1145         int total_handled, num_handled;
1146         u8 count = data->last_message_count;
1147
1148         if (count < 1 || count > data->max_reportid)
1149                 count = 1;
1150
1151         /* include final invalid message */
1152         total_handled = mxt_read_and_process_messages(data, count + 1);
1153         if (total_handled < 0)
1154                 return IRQ_NONE;
1155         /* if there were invalid messages, then we are done */
1156         else if (total_handled <= count)
1157                 goto update_count;
1158
1159         /* keep reading two msgs until one is invalid or reportid limit */
1160         do {
1161                 num_handled = mxt_read_and_process_messages(data, 2);
1162                 if (num_handled < 0)
1163                         return IRQ_NONE;
1164
1165                 total_handled += num_handled;
1166
1167                 if (num_handled < 2)
1168                         break;
1169         } while (total_handled < data->num_touchids);
1170
1171 update_count:
1172         data->last_message_count = total_handled;
1173
1174         if (data->update_input) {
1175                 mxt_input_sync(data);
1176                 data->update_input = false;
1177         }
1178
1179         return IRQ_HANDLED;
1180 }
1181
1182 static irqreturn_t mxt_interrupt(int irq, void *dev_id)
1183 {
1184         struct mxt_data *data = dev_id;
1185
1186         if (data->in_bootloader) {
1187                 /* bootloader state transition completion */
1188                 complete(&data->bl_completion);
1189                 return IRQ_HANDLED;
1190         }
1191
1192         if (!data->object_table)
1193                 return IRQ_HANDLED;
1194
1195         if (data->T44_address) {
1196                 return mxt_process_messages_t44(data);
1197         } else {
1198                 return mxt_process_messages(data);
1199         }
1200 }
1201
1202 static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
1203                           u8 value, bool wait)
1204 {
1205         u16 reg;
1206         u8 command_register;
1207         int timeout_counter = 0;
1208         int ret;
1209
1210         reg = data->T6_address + cmd_offset;
1211
1212         ret = mxt_write_reg(data->client, reg, value);
1213         if (ret)
1214                 return ret;
1215
1216         if (!wait)
1217                 return 0;
1218
1219         do {
1220                 msleep(20);
1221                 ret = __mxt_read_reg(data->client, reg, 1, &command_register);
1222                 if (ret)
1223                         return ret;
1224         } while (command_register != 0 && timeout_counter++ <= 100);
1225
1226         if (timeout_counter > 100) {
1227                 dev_err(&data->client->dev, "Command failed!\n");
1228                 return -EIO;
1229         }
1230
1231         return 0;
1232 }
1233
1234 static int mxt_acquire_irq(struct mxt_data *data)
1235 {
1236         int error;
1237
1238         enable_irq(data->irq);
1239
1240         if (data->use_retrigen_workaround) {
1241                 error = mxt_process_messages_until_invalid(data);
1242                 if (error)
1243                         return error;
1244         }
1245
1246         return 0;
1247 }
1248
1249 static int mxt_soft_reset(struct mxt_data *data)
1250 {
1251         struct device *dev = &data->client->dev;
1252         int ret = 0;
1253
1254         dev_info(dev, "Resetting device\n");
1255
1256         disable_irq(data->irq);
1257
1258         reinit_completion(&data->reset_completion);
1259
1260         ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false);
1261         if (ret)
1262                 return ret;
1263
1264         /* Ignore CHG line for 100ms after reset */
1265         msleep(MXT_RESET_INVALID_CHG);
1266
1267         mxt_acquire_irq(data);
1268
1269         ret = mxt_wait_for_completion(data, &data->reset_completion,
1270                                       MXT_RESET_TIMEOUT);
1271         if (ret)
1272                 return ret;
1273
1274         return 0;
1275 }
1276
1277 static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value)
1278 {
1279         /*
1280          * On failure, CRC is set to 0 and config will always be
1281          * downloaded.
1282          */
1283         data->config_crc = 0;
1284         reinit_completion(&data->crc_completion);
1285
1286         mxt_t6_command(data, cmd, value, true);
1287
1288         /*
1289          * Wait for crc message. On failure, CRC is set to 0 and config will
1290          * always be downloaded.
1291          */
1292         mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT);
1293 }
1294
1295 static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte)
1296 {
1297         static const unsigned int crcpoly = 0x80001B;
1298         u32 result;
1299         u32 data_word;
1300
1301         data_word = (secondbyte << 8) | firstbyte;
1302         result = ((*crc << 1) ^ data_word);
1303
1304         if (result & 0x1000000)
1305                 result ^= crcpoly;
1306
1307         *crc = result;
1308 }
1309
1310 static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off)
1311 {
1312         u32 crc = 0;
1313         u8 *ptr = base + start_off;
1314         u8 *last_val = base + end_off - 1;
1315
1316         if (end_off < start_off)
1317                 return -EINVAL;
1318
1319         while (ptr < last_val) {
1320                 mxt_calc_crc24(&crc, *ptr, *(ptr + 1));
1321                 ptr += 2;
1322         }
1323
1324         /* if len is odd, fill the last byte with 0 */
1325         if (ptr == last_val)
1326                 mxt_calc_crc24(&crc, *ptr, 0);
1327
1328         /* Mask to 24-bit */
1329         crc &= 0x00FFFFFF;
1330
1331         return crc;
1332 }
1333
1334 static int mxt_check_retrigen(struct mxt_data *data)
1335 {
1336         struct i2c_client *client = data->client;
1337         int error;
1338         int val;
1339         struct irq_data *irqd;
1340
1341         data->use_retrigen_workaround = false;
1342
1343         irqd = irq_get_irq_data(data->irq);
1344         if (!irqd)
1345                 return -EINVAL;
1346
1347         if (irqd_is_level_type(irqd))
1348                 return 0;
1349
1350         if (data->T18_address) {
1351                 error = __mxt_read_reg(client,
1352                                        data->T18_address + MXT_COMMS_CTRL,
1353                                        1, &val);
1354                 if (error)
1355                         return error;
1356
1357                 if (val & MXT_COMMS_RETRIGEN)
1358                         return 0;
1359         }
1360
1361         dev_warn(&client->dev, "Enabling RETRIGEN workaround\n");
1362         data->use_retrigen_workaround = true;
1363         return 0;
1364 }
1365
1366 static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
1367 {
1368         struct device *dev = &data->client->dev;
1369         struct mxt_object *object;
1370         unsigned int type, instance, size, byte_offset;
1371         int offset;
1372         int ret;
1373         int i;
1374         u16 reg;
1375         u8 val;
1376
1377         while (cfg->raw_pos < cfg->raw_size) {
1378                 /* Read type, instance, length */
1379                 ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n",
1380                              &type, &instance, &size, &offset);
1381                 if (ret == 0) {
1382                         /* EOF */
1383                         break;
1384                 } else if (ret != 3) {
1385                         dev_err(dev, "Bad format: failed to parse object\n");
1386                         return -EINVAL;
1387                 }
1388                 cfg->raw_pos += offset;
1389
1390                 object = mxt_get_object(data, type);
1391                 if (!object) {
1392                         /* Skip object */
1393                         for (i = 0; i < size; i++) {
1394                                 ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
1395                                              &val, &offset);
1396                                 if (ret != 1) {
1397                                         dev_err(dev, "Bad format in T%d at %d\n",
1398                                                 type, i);
1399                                         return -EINVAL;
1400                                 }
1401                                 cfg->raw_pos += offset;
1402                         }
1403                         continue;
1404                 }
1405
1406                 if (size > mxt_obj_size(object)) {
1407                         /*
1408                          * Either we are in fallback mode due to wrong
1409                          * config or config from a later fw version,
1410                          * or the file is corrupt or hand-edited.
1411                          */
1412                         dev_warn(dev, "Discarding %zu byte(s) in T%u\n",
1413                                  size - mxt_obj_size(object), type);
1414                 } else if (mxt_obj_size(object) > size) {
1415                         /*
1416                          * If firmware is upgraded, new bytes may be added to
1417                          * end of objects. It is generally forward compatible
1418                          * to zero these bytes - previous behaviour will be
1419                          * retained. However this does invalidate the CRC and
1420                          * will force fallback mode until the configuration is
1421                          * updated. We warn here but do nothing else - the
1422                          * malloc has zeroed the entire configuration.
1423                          */
1424                         dev_warn(dev, "Zeroing %zu byte(s) in T%d\n",
1425                                  mxt_obj_size(object) - size, type);
1426                 }
1427
1428                 if (instance >= mxt_obj_instances(object)) {
1429                         dev_err(dev, "Object instances exceeded!\n");
1430                         return -EINVAL;
1431                 }
1432
1433                 reg = object->start_address + mxt_obj_size(object) * instance;
1434
1435                 for (i = 0; i < size; i++) {
1436                         ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n",
1437                                      &val,
1438                                      &offset);
1439                         if (ret != 1) {
1440                                 dev_err(dev, "Bad format in T%d at %d\n",
1441                                         type, i);
1442                                 return -EINVAL;
1443                         }
1444                         cfg->raw_pos += offset;
1445
1446                         if (i > mxt_obj_size(object))
1447                                 continue;
1448
1449                         byte_offset = reg + i - cfg->start_ofs;
1450
1451                         if (byte_offset >= 0 && byte_offset < cfg->mem_size) {
1452                                 *(cfg->mem + byte_offset) = val;
1453                         } else {
1454                                 dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n",
1455                                         reg, object->type, byte_offset);
1456                                 return -EINVAL;
1457                         }
1458                 }
1459         }
1460
1461         return 0;
1462 }
1463
1464 static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg)
1465 {
1466         unsigned int byte_offset = 0;
1467         int error;
1468
1469         /* Write configuration as blocks */
1470         while (byte_offset < cfg->mem_size) {
1471                 unsigned int size = cfg->mem_size - byte_offset;
1472
1473                 if (size > MXT_MAX_BLOCK_WRITE)
1474                         size = MXT_MAX_BLOCK_WRITE;
1475
1476                 error = __mxt_write_reg(data->client,
1477                                         cfg->start_ofs + byte_offset,
1478                                         size, cfg->mem + byte_offset);
1479                 if (error) {
1480                         dev_err(&data->client->dev,
1481                                 "Config write error, ret=%d\n", error);
1482                         return error;
1483                 }
1484
1485                 byte_offset += size;
1486         }
1487
1488         return 0;
1489 }
1490
1491 static int mxt_init_t7_power_cfg(struct mxt_data *data);
1492
1493 /*
1494  * mxt_update_cfg - download configuration to chip
1495  *
1496  * Atmel Raw Config File Format
1497  *
1498  * The first four lines of the raw config file contain:
1499  *  1) Version
1500  *  2) Chip ID Information (first 7 bytes of device memory)
1501  *  3) Chip Information Block 24-bit CRC Checksum
1502  *  4) Chip Configuration 24-bit CRC Checksum
1503  *
1504  * The rest of the file consists of one line per object instance:
1505  *   <TYPE> <INSTANCE> <SIZE> <CONTENTS>
1506  *
1507  *   <TYPE> - 2-byte object type as hex
1508  *   <INSTANCE> - 2-byte object instance number as hex
1509  *   <SIZE> - 2-byte object size as hex
1510  *   <CONTENTS> - array of <SIZE> 1-byte hex values
1511  */
1512 static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw)
1513 {
1514         struct device *dev = &data->client->dev;
1515         struct mxt_cfg cfg;
1516         int ret;
1517         int offset;
1518         int i;
1519         u32 info_crc, config_crc, calculated_crc;
1520         u16 crc_start = 0;
1521
1522         /* Make zero terminated copy of the OBP_RAW file */
1523         cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL);
1524         if (!cfg.raw)
1525                 return -ENOMEM;
1526
1527         cfg.raw_size = fw->size;
1528
1529         mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1);
1530
1531         if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) {
1532                 dev_err(dev, "Unrecognised config file\n");
1533                 ret = -EINVAL;
1534                 goto release_raw;
1535         }
1536
1537         cfg.raw_pos = strlen(MXT_CFG_MAGIC);
1538
1539         /* Load information block and check */
1540         for (i = 0; i < sizeof(struct mxt_info); i++) {
1541                 ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n",
1542                              (unsigned char *)&cfg.info + i,
1543                              &offset);
1544                 if (ret != 1) {
1545                         dev_err(dev, "Bad format\n");
1546                         ret = -EINVAL;
1547                         goto release_raw;
1548                 }
1549
1550                 cfg.raw_pos += offset;
1551         }
1552
1553         if (cfg.info.family_id != data->info->family_id) {
1554                 dev_err(dev, "Family ID mismatch!\n");
1555                 ret = -EINVAL;
1556                 goto release_raw;
1557         }
1558
1559         if (cfg.info.variant_id != data->info->variant_id) {
1560                 dev_err(dev, "Variant ID mismatch!\n");
1561                 ret = -EINVAL;
1562                 goto release_raw;
1563         }
1564
1565         /* Read CRCs */
1566         ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &info_crc, &offset);
1567         if (ret != 1) {
1568                 dev_err(dev, "Bad format: failed to parse Info CRC\n");
1569                 ret = -EINVAL;
1570                 goto release_raw;
1571         }
1572         cfg.raw_pos += offset;
1573
1574         ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n", &config_crc, &offset);
1575         if (ret != 1) {
1576                 dev_err(dev, "Bad format: failed to parse Config CRC\n");
1577                 ret = -EINVAL;
1578                 goto release_raw;
1579         }
1580         cfg.raw_pos += offset;
1581
1582         /*
1583          * The Info Block CRC is calculated over mxt_info and the object
1584          * table. If it does not match then we are trying to load the
1585          * configuration from a different chip or firmware version, so
1586          * the configuration CRC is invalid anyway.
1587          */
1588         if (info_crc == data->info_crc) {
1589                 if (config_crc == 0 || data->config_crc == 0) {
1590                         dev_info(dev, "CRC zero, attempting to apply config\n");
1591                 } else if (config_crc == data->config_crc) {
1592                         dev_dbg(dev, "Config CRC 0x%06X: OK\n",
1593                                  data->config_crc);
1594                         ret = 0;
1595                         goto release_raw;
1596                 } else {
1597                         dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n",
1598                                  data->config_crc, config_crc);
1599                 }
1600         } else {
1601                 dev_warn(dev,
1602                          "Warning: Info CRC error - device=0x%06X file=0x%06X\n",
1603                          data->info_crc, info_crc);
1604         }
1605
1606         /* Malloc memory to store configuration */
1607         cfg.start_ofs = MXT_OBJECT_START +
1608                         data->info->object_num * sizeof(struct mxt_object) +
1609                         MXT_INFO_CHECKSUM_SIZE;
1610         cfg.mem_size = data->mem_size - cfg.start_ofs;
1611         cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL);
1612         if (!cfg.mem) {
1613                 ret = -ENOMEM;
1614                 goto release_raw;
1615         }
1616
1617         ret = mxt_prepare_cfg_mem(data, &cfg);
1618         if (ret)
1619                 goto release_mem;
1620
1621         /* Calculate crc of the received configs (not the raw config file) */
1622         if (data->T71_address)
1623                 crc_start = data->T71_address;
1624         else if (data->T7_address)
1625                 crc_start = data->T7_address;
1626         else
1627                 dev_warn(dev, "Could not find CRC start\n");
1628
1629         if (crc_start > cfg.start_ofs) {
1630                 calculated_crc = mxt_calculate_crc(cfg.mem,
1631                                                    crc_start - cfg.start_ofs,
1632                                                    cfg.mem_size);
1633
1634                 if (config_crc > 0 && config_crc != calculated_crc)
1635                         dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n",
1636                                  calculated_crc, config_crc);
1637         }
1638
1639         ret = mxt_upload_cfg_mem(data, &cfg);
1640         if (ret)
1641                 goto release_mem;
1642
1643         mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
1644
1645         ret = mxt_check_retrigen(data);
1646         if (ret)
1647                 goto release_mem;
1648
1649         ret = mxt_soft_reset(data);
1650         if (ret)
1651                 goto release_mem;
1652
1653         dev_info(dev, "Config successfully updated\n");
1654
1655         /* T7 config may have changed */
1656         mxt_init_t7_power_cfg(data);
1657
1658 release_mem:
1659         kfree(cfg.mem);
1660 release_raw:
1661         kfree(cfg.raw);
1662         return ret;
1663 }
1664
1665 static void mxt_free_input_device(struct mxt_data *data)
1666 {
1667         if (data->input_dev) {
1668                 input_unregister_device(data->input_dev);
1669                 data->input_dev = NULL;
1670         }
1671 }
1672
1673 static void mxt_free_object_table(struct mxt_data *data)
1674 {
1675 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
1676         video_unregister_device(&data->dbg.vdev);
1677         v4l2_device_unregister(&data->dbg.v4l2);
1678 #endif
1679         data->object_table = NULL;
1680         data->info = NULL;
1681         kfree(data->raw_info_block);
1682         data->raw_info_block = NULL;
1683         kfree(data->msg_buf);
1684         data->msg_buf = NULL;
1685         data->T5_address = 0;
1686         data->T5_msg_size = 0;
1687         data->T6_reportid = 0;
1688         data->T7_address = 0;
1689         data->T71_address = 0;
1690         data->T9_reportid_min = 0;
1691         data->T9_reportid_max = 0;
1692         data->T18_address = 0;
1693         data->T19_reportid = 0;
1694         data->T44_address = 0;
1695         data->T100_reportid_min = 0;
1696         data->T100_reportid_max = 0;
1697         data->max_reportid = 0;
1698 }
1699
1700 static int mxt_parse_object_table(struct mxt_data *data,
1701                                   struct mxt_object *object_table)
1702 {
1703         struct i2c_client *client = data->client;
1704         int i;
1705         u8 reportid;
1706         u16 end_address;
1707
1708         /* Valid Report IDs start counting from 1 */
1709         reportid = 1;
1710         data->mem_size = 0;
1711         for (i = 0; i < data->info->object_num; i++) {
1712                 struct mxt_object *object = object_table + i;
1713                 u8 min_id, max_id;
1714
1715                 le16_to_cpus(&object->start_address);
1716
1717                 if (object->num_report_ids) {
1718                         min_id = reportid;
1719                         reportid += object->num_report_ids *
1720                                         mxt_obj_instances(object);
1721                         max_id = reportid - 1;
1722                 } else {
1723                         min_id = 0;
1724                         max_id = 0;
1725                 }
1726
1727                 dev_dbg(&data->client->dev,
1728                         "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n",
1729                         object->type, object->start_address,
1730                         mxt_obj_size(object), mxt_obj_instances(object),
1731                         min_id, max_id);
1732
1733                 switch (object->type) {
1734                 case MXT_GEN_MESSAGE_T5:
1735                         if (data->info->family_id == 0x80 &&
1736                             data->info->version < 0x20) {
1737                                 /*
1738                                  * On mXT224 firmware versions prior to V2.0
1739                                  * read and discard unused CRC byte otherwise
1740                                  * DMA reads are misaligned.
1741                                  */
1742                                 data->T5_msg_size = mxt_obj_size(object);
1743                         } else {
1744                                 /* CRC not enabled, so skip last byte */
1745                                 data->T5_msg_size = mxt_obj_size(object) - 1;
1746                         }
1747                         data->T5_address = object->start_address;
1748                         break;
1749                 case MXT_GEN_COMMAND_T6:
1750                         data->T6_reportid = min_id;
1751                         data->T6_address = object->start_address;
1752                         break;
1753                 case MXT_GEN_POWER_T7:
1754                         data->T7_address = object->start_address;
1755                         break;
1756                 case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71:
1757                         data->T71_address = object->start_address;
1758                         break;
1759                 case MXT_TOUCH_MULTI_T9:
1760                         data->multitouch = MXT_TOUCH_MULTI_T9;
1761                         /* Only handle messages from first T9 instance */
1762                         data->T9_reportid_min = min_id;
1763                         data->T9_reportid_max = min_id +
1764                                                 object->num_report_ids - 1;
1765                         data->num_touchids = object->num_report_ids;
1766                         break;
1767                 case MXT_SPT_COMMSCONFIG_T18:
1768                         data->T18_address = object->start_address;
1769                         break;
1770                 case MXT_SPT_MESSAGECOUNT_T44:
1771                         data->T44_address = object->start_address;
1772                         break;
1773                 case MXT_SPT_GPIOPWM_T19:
1774                         data->T19_reportid = min_id;
1775                         break;
1776                 case MXT_TOUCH_MULTITOUCHSCREEN_T100:
1777                         data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100;
1778                         data->T100_reportid_min = min_id;
1779                         data->T100_reportid_max = max_id;
1780                         /* first two report IDs reserved */
1781                         data->num_touchids = object->num_report_ids - 2;
1782                         break;
1783                 }
1784
1785                 end_address = object->start_address
1786                         + mxt_obj_size(object) * mxt_obj_instances(object) - 1;
1787
1788                 if (end_address >= data->mem_size)
1789                         data->mem_size = end_address + 1;
1790         }
1791
1792         /* Store maximum reportid */
1793         data->max_reportid = reportid;
1794
1795         /* If T44 exists, T5 position has to be directly after */
1796         if (data->T44_address && (data->T5_address != data->T44_address + 1)) {
1797                 dev_err(&client->dev, "Invalid T44 position\n");
1798                 return -EINVAL;
1799         }
1800
1801         data->msg_buf = kcalloc(data->max_reportid,
1802                                 data->T5_msg_size, GFP_KERNEL);
1803         if (!data->msg_buf)
1804                 return -ENOMEM;
1805
1806         return 0;
1807 }
1808
1809 static int mxt_read_info_block(struct mxt_data *data)
1810 {
1811         struct i2c_client *client = data->client;
1812         int error;
1813         size_t size;
1814         void *id_buf, *buf;
1815         uint8_t num_objects;
1816         u32 calculated_crc;
1817         u8 *crc_ptr;
1818
1819         /* If info block already allocated, free it */
1820         if (data->raw_info_block)
1821                 mxt_free_object_table(data);
1822
1823         /* Read 7-byte ID information block starting at address 0 */
1824         size = sizeof(struct mxt_info);
1825         id_buf = kzalloc(size, GFP_KERNEL);
1826         if (!id_buf)
1827                 return -ENOMEM;
1828
1829         error = __mxt_read_reg(client, 0, size, id_buf);
1830         if (error)
1831                 goto err_free_mem;
1832
1833         /* Resize buffer to give space for rest of info block */
1834         num_objects = ((struct mxt_info *)id_buf)->object_num;
1835         size += (num_objects * sizeof(struct mxt_object))
1836                 + MXT_INFO_CHECKSUM_SIZE;
1837
1838         buf = krealloc(id_buf, size, GFP_KERNEL);
1839         if (!buf) {
1840                 error = -ENOMEM;
1841                 goto err_free_mem;
1842         }
1843         id_buf = buf;
1844
1845         /* Read rest of info block */
1846         error = __mxt_read_reg(client, MXT_OBJECT_START,
1847                                size - MXT_OBJECT_START,
1848                                id_buf + MXT_OBJECT_START);
1849         if (error)
1850                 goto err_free_mem;
1851
1852         /* Extract & calculate checksum */
1853         crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE;
1854         data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16);
1855
1856         calculated_crc = mxt_calculate_crc(id_buf, 0,
1857                                            size - MXT_INFO_CHECKSUM_SIZE);
1858
1859         /*
1860          * CRC mismatch can be caused by data corruption due to I2C comms
1861          * issue or else device is not using Object Based Protocol (eg i2c-hid)
1862          */
1863         if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) {
1864                 dev_err(&client->dev,
1865                         "Info Block CRC error calculated=0x%06X read=0x%06X\n",
1866                         calculated_crc, data->info_crc);
1867                 error = -EIO;
1868                 goto err_free_mem;
1869         }
1870
1871         data->raw_info_block = id_buf;
1872         data->info = (struct mxt_info *)id_buf;
1873
1874         dev_info(&client->dev,
1875                  "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n",
1876                  data->info->family_id, data->info->variant_id,
1877                  data->info->version >> 4, data->info->version & 0xf,
1878                  data->info->build, data->info->object_num);
1879
1880         /* Parse object table information */
1881         error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START);
1882         if (error) {
1883                 dev_err(&client->dev, "Error %d parsing object table\n", error);
1884                 mxt_free_object_table(data);
1885                 return error;
1886         }
1887
1888         data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START);
1889
1890         return 0;
1891
1892 err_free_mem:
1893         kfree(id_buf);
1894         return error;
1895 }
1896
1897 static int mxt_read_t9_resolution(struct mxt_data *data)
1898 {
1899         struct i2c_client *client = data->client;
1900         int error;
1901         struct t9_range range;
1902         unsigned char orient;
1903         struct mxt_object *object;
1904
1905         object = mxt_get_object(data, MXT_TOUCH_MULTI_T9);
1906         if (!object)
1907                 return -EINVAL;
1908
1909         error = __mxt_read_reg(client,
1910                                object->start_address + MXT_T9_XSIZE,
1911                                sizeof(data->xsize), &data->xsize);
1912         if (error)
1913                 return error;
1914
1915         error = __mxt_read_reg(client,
1916                                object->start_address + MXT_T9_YSIZE,
1917                                sizeof(data->ysize), &data->ysize);
1918         if (error)
1919                 return error;
1920
1921         error = __mxt_read_reg(client,
1922                                object->start_address + MXT_T9_RANGE,
1923                                sizeof(range), &range);
1924         if (error)
1925                 return error;
1926
1927         data->max_x = get_unaligned_le16(&range.x);
1928         data->max_y = get_unaligned_le16(&range.y);
1929
1930         error =  __mxt_read_reg(client,
1931                                 object->start_address + MXT_T9_ORIENT,
1932                                 1, &orient);
1933         if (error)
1934                 return error;
1935
1936         data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
1937         data->invertx = orient & MXT_T9_ORIENT_INVERTX;
1938         data->inverty = orient & MXT_T9_ORIENT_INVERTY;
1939
1940         return 0;
1941 }
1942
1943 static int mxt_read_t100_config(struct mxt_data *data)
1944 {
1945         struct i2c_client *client = data->client;
1946         int error;
1947         struct mxt_object *object;
1948         u16 range_x, range_y;
1949         u8 cfg, tchaux;
1950         u8 aux;
1951
1952         object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100);
1953         if (!object)
1954                 return -EINVAL;
1955
1956         /* read touchscreen dimensions */
1957         error = __mxt_read_reg(client,
1958                                object->start_address + MXT_T100_XRANGE,
1959                                sizeof(range_x), &range_x);
1960         if (error)
1961                 return error;
1962
1963         data->max_x = get_unaligned_le16(&range_x);
1964
1965         error = __mxt_read_reg(client,
1966                                object->start_address + MXT_T100_YRANGE,
1967                                sizeof(range_y), &range_y);
1968         if (error)
1969                 return error;
1970
1971         data->max_y = get_unaligned_le16(&range_y);
1972
1973         error = __mxt_read_reg(client,
1974                                object->start_address + MXT_T100_XSIZE,
1975                                sizeof(data->xsize), &data->xsize);
1976         if (error)
1977                 return error;
1978
1979         error = __mxt_read_reg(client,
1980                                object->start_address + MXT_T100_YSIZE,
1981                                sizeof(data->ysize), &data->ysize);
1982         if (error)
1983                 return error;
1984
1985         /* read orientation config */
1986         error =  __mxt_read_reg(client,
1987                                 object->start_address + MXT_T100_CFG1,
1988                                 1, &cfg);
1989         if (error)
1990                 return error;
1991
1992         data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
1993         data->invertx = cfg & MXT_T100_CFG_INVERTX;
1994         data->inverty = cfg & MXT_T100_CFG_INVERTY;
1995
1996         /* allocate aux bytes */
1997         error =  __mxt_read_reg(client,
1998                                 object->start_address + MXT_T100_TCHAUX,
1999                                 1, &tchaux);
2000         if (error)
2001                 return error;
2002
2003         aux = 6;
2004
2005         if (tchaux & MXT_T100_TCHAUX_VECT)
2006                 data->t100_aux_vect = aux++;
2007
2008         if (tchaux & MXT_T100_TCHAUX_AMPL)
2009                 data->t100_aux_ampl = aux++;
2010
2011         if (tchaux & MXT_T100_TCHAUX_AREA)
2012                 data->t100_aux_area = aux++;
2013
2014         dev_dbg(&client->dev,
2015                 "T100 aux mappings vect:%u ampl:%u area:%u\n",
2016                 data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area);
2017
2018         return 0;
2019 }
2020
2021 static int mxt_input_open(struct input_dev *dev);
2022 static void mxt_input_close(struct input_dev *dev);
2023
2024 static void mxt_set_up_as_touchpad(struct input_dev *input_dev,
2025                                    struct mxt_data *data)
2026 {
2027         int i;
2028
2029         input_dev->name = "Atmel maXTouch Touchpad";
2030
2031         __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
2032
2033         input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
2034         input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
2035         input_abs_set_res(input_dev, ABS_MT_POSITION_X,
2036                           MXT_PIXELS_PER_MM);
2037         input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
2038                           MXT_PIXELS_PER_MM);
2039
2040         for (i = 0; i < data->t19_num_keys; i++)
2041                 if (data->t19_keymap[i] != KEY_RESERVED)
2042                         input_set_capability(input_dev, EV_KEY,
2043                                              data->t19_keymap[i]);
2044 }
2045
2046 static int mxt_initialize_input_device(struct mxt_data *data)
2047 {
2048         struct device *dev = &data->client->dev;
2049         struct input_dev *input_dev;
2050         int error;
2051         unsigned int num_mt_slots;
2052         unsigned int mt_flags = 0;
2053
2054         switch (data->multitouch) {
2055         case MXT_TOUCH_MULTI_T9:
2056                 num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
2057                 error = mxt_read_t9_resolution(data);
2058                 if (error)
2059                         dev_warn(dev, "Failed to initialize T9 resolution\n");
2060                 break;
2061
2062         case MXT_TOUCH_MULTITOUCHSCREEN_T100:
2063                 num_mt_slots = data->num_touchids;
2064                 error = mxt_read_t100_config(data);
2065                 if (error)
2066                         dev_warn(dev, "Failed to read T100 config\n");
2067                 break;
2068
2069         default:
2070                 dev_err(dev, "Invalid multitouch object\n");
2071                 return -EINVAL;
2072         }
2073
2074         /* Handle default values and orientation switch */
2075         if (data->max_x == 0)
2076                 data->max_x = 1023;
2077
2078         if (data->max_y == 0)
2079                 data->max_y = 1023;
2080
2081         if (data->xy_switch)
2082                 swap(data->max_x, data->max_y);
2083
2084         dev_info(dev, "Touchscreen size X%uY%u\n", data->max_x, data->max_y);
2085
2086         /* Register input device */
2087         input_dev = input_allocate_device();
2088         if (!input_dev)
2089                 return -ENOMEM;
2090
2091         input_dev->name = "Atmel maXTouch Touchscreen";
2092         input_dev->phys = data->phys;
2093         input_dev->id.bustype = BUS_I2C;
2094         input_dev->dev.parent = dev;
2095         input_dev->open = mxt_input_open;
2096         input_dev->close = mxt_input_close;
2097
2098         input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
2099
2100         /* For single touch */
2101         input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0);
2102         input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0);
2103
2104         if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2105             (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2106              data->t100_aux_ampl)) {
2107                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
2108         }
2109
2110         /* If device has buttons we assume it is a touchpad */
2111         if (data->t19_num_keys) {
2112                 mxt_set_up_as_touchpad(input_dev, data);
2113                 mt_flags |= INPUT_MT_POINTER;
2114         } else {
2115                 mt_flags |= INPUT_MT_DIRECT;
2116         }
2117
2118         /* For multi touch */
2119         error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags);
2120         if (error) {
2121                 dev_err(dev, "Error %d initialising slots\n", error);
2122                 goto err_free_mem;
2123         }
2124
2125         if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) {
2126                 input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
2127                                      0, MT_TOOL_MAX, 0, 0);
2128                 input_set_abs_params(input_dev, ABS_MT_DISTANCE,
2129                                      MXT_DISTANCE_ACTIVE_TOUCH,
2130                                      MXT_DISTANCE_HOVERING,
2131                                      0, 0);
2132         }
2133
2134         input_set_abs_params(input_dev, ABS_MT_POSITION_X,
2135                              0, data->max_x, 0, 0);
2136         input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
2137                              0, data->max_y, 0, 0);
2138
2139         if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2140             (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2141              data->t100_aux_area)) {
2142                 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
2143                                      0, MXT_MAX_AREA, 0, 0);
2144         }
2145
2146         if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
2147             (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2148              data->t100_aux_ampl)) {
2149                 input_set_abs_params(input_dev, ABS_MT_PRESSURE,
2150                                      0, 255, 0, 0);
2151         }
2152
2153         if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2154             data->t100_aux_vect) {
2155                 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2156                                      0, 255, 0, 0);
2157         }
2158
2159         if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
2160             data->t100_aux_vect) {
2161                 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
2162                                      0, 255, 0, 0);
2163         }
2164
2165         input_set_drvdata(input_dev, data);
2166
2167         error = input_register_device(input_dev);
2168         if (error) {
2169                 dev_err(dev, "Error %d registering input device\n", error);
2170                 goto err_free_mem;
2171         }
2172
2173         data->input_dev = input_dev;
2174
2175         return 0;
2176
2177 err_free_mem:
2178         input_free_device(input_dev);
2179         return error;
2180 }
2181
2182 static int mxt_configure_objects(struct mxt_data *data,
2183                                  const struct firmware *cfg);
2184
2185 static void mxt_config_cb(const struct firmware *cfg, void *ctx)
2186 {
2187         mxt_configure_objects(ctx, cfg);
2188         release_firmware(cfg);
2189 }
2190
2191 static int mxt_initialize(struct mxt_data *data)
2192 {
2193         struct i2c_client *client = data->client;
2194         int recovery_attempts = 0;
2195         int error;
2196
2197         while (1) {
2198                 error = mxt_read_info_block(data);
2199                 if (!error)
2200                         break;
2201
2202                 /* Check bootloader state */
2203                 error = mxt_probe_bootloader(data, false);
2204                 if (error) {
2205                         dev_info(&client->dev, "Trying alternate bootloader address\n");
2206                         error = mxt_probe_bootloader(data, true);
2207                         if (error) {
2208                                 /* Chip is not in appmode or bootloader mode */
2209                                 return error;
2210                         }
2211                 }
2212
2213                 /* OK, we are in bootloader, see if we can recover */
2214                 if (++recovery_attempts > 1) {
2215                         dev_err(&client->dev, "Could not recover from bootloader mode\n");
2216                         /*
2217                          * We can reflash from this state, so do not
2218                          * abort initialization.
2219                          */
2220                         data->in_bootloader = true;
2221                         return 0;
2222                 }
2223
2224                 /* Attempt to exit bootloader into app mode */
2225                 mxt_send_bootloader_cmd(data, false);
2226                 msleep(MXT_FW_RESET_TIME);
2227         }
2228
2229         error = mxt_check_retrigen(data);
2230         if (error)
2231                 return error;
2232
2233         error = mxt_acquire_irq(data);
2234         if (error)
2235                 return error;
2236
2237         error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
2238                                         &client->dev, GFP_KERNEL, data,
2239                                         mxt_config_cb);
2240         if (error) {
2241                 dev_err(&client->dev, "Failed to invoke firmware loader: %d\n",
2242                         error);
2243                 return error;
2244         }
2245
2246         return 0;
2247 }
2248
2249 static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep)
2250 {
2251         struct device *dev = &data->client->dev;
2252         int error;
2253         struct t7_config *new_config;
2254         struct t7_config deepsleep = { .active = 0, .idle = 0 };
2255
2256         if (sleep == MXT_POWER_CFG_DEEPSLEEP)
2257                 new_config = &deepsleep;
2258         else
2259                 new_config = &data->t7_cfg;
2260
2261         error = __mxt_write_reg(data->client, data->T7_address,
2262                                 sizeof(data->t7_cfg), new_config);
2263         if (error)
2264                 return error;
2265
2266         dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n",
2267                 new_config->active, new_config->idle);
2268
2269         return 0;
2270 }
2271
2272 static int mxt_init_t7_power_cfg(struct mxt_data *data)
2273 {
2274         struct device *dev = &data->client->dev;
2275         int error;
2276         bool retry = false;
2277
2278 recheck:
2279         error = __mxt_read_reg(data->client, data->T7_address,
2280                                 sizeof(data->t7_cfg), &data->t7_cfg);
2281         if (error)
2282                 return error;
2283
2284         if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) {
2285                 if (!retry) {
2286                         dev_dbg(dev, "T7 cfg zero, resetting\n");
2287                         mxt_soft_reset(data);
2288                         retry = true;
2289                         goto recheck;
2290                 } else {
2291                         dev_dbg(dev, "T7 cfg zero after reset, overriding\n");
2292                         data->t7_cfg.active = 20;
2293                         data->t7_cfg.idle = 100;
2294                         return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
2295                 }
2296         }
2297
2298         dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n",
2299                 data->t7_cfg.active, data->t7_cfg.idle);
2300         return 0;
2301 }
2302
2303 #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37
2304 static const struct v4l2_file_operations mxt_video_fops = {
2305         .owner = THIS_MODULE,
2306         .open = v4l2_fh_open,
2307         .release = vb2_fop_release,
2308         .unlocked_ioctl = video_ioctl2,
2309         .read = vb2_fop_read,
2310         .mmap = vb2_fop_mmap,
2311         .poll = vb2_fop_poll,
2312 };
2313
2314 static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
2315                                unsigned int y)
2316 {
2317         struct mxt_info *info = data->info;
2318         struct mxt_dbg *dbg = &data->dbg;
2319         unsigned int ofs, page;
2320         unsigned int col = 0;
2321         unsigned int col_width;
2322
2323         if (info->family_id == MXT_FAMILY_1386) {
2324                 col_width = info->matrix_ysize / MXT1386_COLUMNS;
2325                 col = y / col_width;
2326                 y = y % col_width;
2327         } else {
2328                 col_width = info->matrix_ysize;
2329         }
2330
2331         ofs = (y + (x * col_width)) * sizeof(u16);
2332         page = ofs / MXT_DIAGNOSTIC_SIZE;
2333         ofs %= MXT_DIAGNOSTIC_SIZE;
2334
2335         if (info->family_id == MXT_FAMILY_1386)
2336                 page += col * MXT1386_PAGES_PER_COLUMN;
2337
2338         return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
2339 }
2340
2341 static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
2342 {
2343         struct mxt_dbg *dbg = &data->dbg;
2344         unsigned int x = 0;
2345         unsigned int y = 0;
2346         unsigned int i, rx, ry;
2347
2348         for (i = 0; i < dbg->t37_nodes; i++) {
2349                 /* Handle orientation */
2350                 rx = data->xy_switch ? y : x;
2351                 ry = data->xy_switch ? x : y;
2352                 rx = data->invertx ? (data->xsize - 1 - rx) : rx;
2353                 ry = data->inverty ? (data->ysize - 1 - ry) : ry;
2354
2355                 outbuf[i] = mxt_get_debug_value(data, rx, ry);
2356
2357                 /* Next value */
2358                 if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
2359                         x = 0;
2360                         y++;
2361                 }
2362         }
2363
2364         return 0;
2365 }
2366
2367 static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
2368                                      u16 *outbuf)
2369 {
2370         struct mxt_dbg *dbg = &data->dbg;
2371         int retries = 0;
2372         int page;
2373         int ret;
2374         u8 cmd = mode;
2375         struct t37_debug *p;
2376         u8 cmd_poll;
2377
2378         for (page = 0; page < dbg->t37_pages; page++) {
2379                 p = dbg->t37_buf + page;
2380
2381                 ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
2382                                     cmd);
2383                 if (ret)
2384                         return ret;
2385
2386                 retries = 0;
2387                 msleep(20);
2388 wait_cmd:
2389                 /* Read back command byte */
2390                 ret = __mxt_read_reg(data->client, dbg->diag_cmd_address,
2391                                      sizeof(cmd_poll), &cmd_poll);
2392                 if (ret)
2393                         return ret;
2394
2395                 /* Field is cleared once the command has been processed */
2396                 if (cmd_poll) {
2397                         if (retries++ > 100)
2398                                 return -EINVAL;
2399
2400                         msleep(20);
2401                         goto wait_cmd;
2402                 }
2403
2404                 /* Read T37 page */
2405                 ret = __mxt_read_reg(data->client, dbg->t37_address,
2406                                      sizeof(struct t37_debug), p);
2407                 if (ret)
2408                         return ret;
2409
2410                 if (p->mode != mode || p->page != page) {
2411                         dev_err(&data->client->dev, "T37 page mismatch\n");
2412                         return -EINVAL;
2413                 }
2414
2415                 dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
2416                         __func__, page, retries);
2417
2418                 /* For remaining pages, write PAGEUP rather than mode */
2419                 cmd = MXT_DIAGNOSTIC_PAGEUP;
2420         }
2421
2422         return mxt_convert_debug_pages(data, outbuf);
2423 }
2424
2425 static int mxt_queue_setup(struct vb2_queue *q,
2426                        unsigned int *nbuffers, unsigned int *nplanes,
2427                        unsigned int sizes[], struct device *alloc_devs[])
2428 {
2429         struct mxt_data *data = q->drv_priv;
2430         size_t size = data->dbg.t37_nodes * sizeof(u16);
2431
2432         if (*nplanes)
2433                 return sizes[0] < size ? -EINVAL : 0;
2434
2435         *nplanes = 1;
2436         sizes[0] = size;
2437
2438         return 0;
2439 }
2440
2441 static void mxt_buffer_queue(struct vb2_buffer *vb)
2442 {
2443         struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue);
2444         u16 *ptr;
2445         int ret;
2446         u8 mode;
2447
2448         ptr = vb2_plane_vaddr(vb, 0);
2449         if (!ptr) {
2450                 dev_err(&data->client->dev, "Error acquiring frame ptr\n");
2451                 goto fault;
2452         }
2453
2454         switch (data->dbg.input) {
2455         case MXT_V4L_INPUT_DELTAS:
2456         default:
2457                 mode = MXT_DIAGNOSTIC_DELTAS;
2458                 break;
2459
2460         case MXT_V4L_INPUT_REFS:
2461                 mode = MXT_DIAGNOSTIC_REFS;
2462                 break;
2463         }
2464
2465         ret = mxt_read_diagnostic_debug(data, mode, ptr);
2466         if (ret)
2467                 goto fault;
2468
2469         vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16));
2470         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
2471         return;
2472
2473 fault:
2474         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
2475 }
2476
2477 /* V4L2 structures */
2478 static const struct vb2_ops mxt_queue_ops = {
2479         .queue_setup            = mxt_queue_setup,
2480         .buf_queue              = mxt_buffer_queue,
2481         .wait_prepare           = vb2_ops_wait_prepare,
2482         .wait_finish            = vb2_ops_wait_finish,
2483 };
2484
2485 static const struct vb2_queue mxt_queue = {
2486         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2487         .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
2488         .buf_struct_size = sizeof(struct mxt_vb2_buffer),
2489         .ops = &mxt_queue_ops,
2490         .mem_ops = &vb2_vmalloc_memops,
2491         .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
2492         .min_buffers_needed = 1,
2493 };
2494
2495 static int mxt_vidioc_querycap(struct file *file, void *priv,
2496                                  struct v4l2_capability *cap)
2497 {
2498         struct mxt_data *data = video_drvdata(file);
2499
2500         strlcpy(cap->driver, "atmel_mxt_ts", sizeof(cap->driver));
2501         strlcpy(cap->card, "atmel_mxt_ts touch", sizeof(cap->card));
2502         snprintf(cap->bus_info, sizeof(cap->bus_info),
2503                  "I2C:%s", dev_name(&data->client->dev));
2504         return 0;
2505 }
2506
2507 static int mxt_vidioc_enum_input(struct file *file, void *priv,
2508                                    struct v4l2_input *i)
2509 {
2510         if (i->index >= MXT_V4L_INPUT_MAX)
2511                 return -EINVAL;
2512
2513         i->type = V4L2_INPUT_TYPE_TOUCH;
2514
2515         switch (i->index) {
2516         case MXT_V4L_INPUT_REFS:
2517                 strlcpy(i->name, "Mutual Capacitance References",
2518                         sizeof(i->name));
2519                 break;
2520         case MXT_V4L_INPUT_DELTAS:
2521                 strlcpy(i->name, "Mutual Capacitance Deltas", sizeof(i->name));
2522                 break;
2523         }
2524
2525         return 0;
2526 }
2527
2528 static int mxt_set_input(struct mxt_data *data, unsigned int i)
2529 {
2530         struct v4l2_pix_format *f = &data->dbg.format;
2531
2532         if (i >= MXT_V4L_INPUT_MAX)
2533                 return -EINVAL;
2534
2535         if (i == MXT_V4L_INPUT_DELTAS)
2536                 f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2537         else
2538                 f->pixelformat = V4L2_TCH_FMT_TU16;
2539
2540         f->width = data->xy_switch ? data->ysize : data->xsize;
2541         f->height = data->xy_switch ? data->xsize : data->ysize;
2542         f->field = V4L2_FIELD_NONE;
2543         f->colorspace = V4L2_COLORSPACE_RAW;
2544         f->bytesperline = f->width * sizeof(u16);
2545         f->sizeimage = f->width * f->height * sizeof(u16);
2546
2547         data->dbg.input = i;
2548
2549         return 0;
2550 }
2551
2552 static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i)
2553 {
2554         return mxt_set_input(video_drvdata(file), i);
2555 }
2556
2557 static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
2558 {
2559         struct mxt_data *data = video_drvdata(file);
2560
2561         *i = data->dbg.input;
2562
2563         return 0;
2564 }
2565
2566 static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f)
2567 {
2568         struct mxt_data *data = video_drvdata(file);
2569
2570         f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2571         f->fmt.pix = data->dbg.format;
2572
2573         return 0;
2574 }
2575
2576 static int mxt_vidioc_enum_fmt(struct file *file, void *priv,
2577                                  struct v4l2_fmtdesc *fmt)
2578 {
2579         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2580                 return -EINVAL;
2581
2582         switch (fmt->index) {
2583         case 0:
2584                 fmt->pixelformat = V4L2_TCH_FMT_TU16;
2585                 break;
2586
2587         case 1:
2588                 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
2589                 break;
2590
2591         default:
2592                 return -EINVAL;
2593         }
2594
2595         return 0;
2596 }
2597
2598 static int mxt_vidioc_g_parm(struct file *file, void *fh,
2599                              struct v4l2_streamparm *a)
2600 {
2601         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2602                 return -EINVAL;
2603
2604         a->parm.capture.readbuffers = 1;
2605         a->parm.capture.timeperframe.numerator = 1;
2606         a->parm.capture.timeperframe.denominator = 10;
2607         return 0;
2608 }
2609
2610 static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = {
2611         .vidioc_querycap        = mxt_vidioc_querycap,
2612
2613         .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt,
2614         .vidioc_s_fmt_vid_cap   = mxt_vidioc_fmt,
2615         .vidioc_g_fmt_vid_cap   = mxt_vidioc_fmt,
2616         .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt,
2617         .vidioc_g_parm          = mxt_vidioc_g_parm,
2618
2619         .vidioc_enum_input      = mxt_vidioc_enum_input,
2620         .vidioc_g_input         = mxt_vidioc_g_input,
2621         .vidioc_s_input         = mxt_vidioc_s_input,
2622
2623         .vidioc_reqbufs         = vb2_ioctl_reqbufs,
2624         .vidioc_create_bufs     = vb2_ioctl_create_bufs,
2625         .vidioc_querybuf        = vb2_ioctl_querybuf,
2626         .vidioc_qbuf            = vb2_ioctl_qbuf,
2627         .vidioc_dqbuf           = vb2_ioctl_dqbuf,
2628         .vidioc_expbuf          = vb2_ioctl_expbuf,
2629
2630         .vidioc_streamon        = vb2_ioctl_streamon,
2631         .vidioc_streamoff       = vb2_ioctl_streamoff,
2632 };
2633
2634 static const struct video_device mxt_video_device = {
2635         .name = "Atmel maxTouch",
2636         .fops = &mxt_video_fops,
2637         .ioctl_ops = &mxt_video_ioctl_ops,
2638         .release = video_device_release_empty,
2639         .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
2640                        V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
2641 };
2642
2643 static void mxt_debug_init(struct mxt_data *data)
2644 {
2645         struct mxt_info *info = data->info;
2646         struct mxt_dbg *dbg = &data->dbg;
2647         struct mxt_object *object;
2648         int error;
2649
2650         object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
2651         if (!object)
2652                 goto error;
2653
2654         dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC;
2655
2656         object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37);
2657         if (!object)
2658                 goto error;
2659
2660         if (mxt_obj_size(object) != sizeof(struct t37_debug)) {
2661                 dev_warn(&data->client->dev, "Bad T37 size");
2662                 goto error;
2663         }
2664
2665         dbg->t37_address = object->start_address;
2666
2667         /* Calculate size of data and allocate buffer */
2668         dbg->t37_nodes = data->xsize * data->ysize;
2669
2670         if (info->family_id == MXT_FAMILY_1386)
2671                 dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN;
2672         else
2673                 dbg->t37_pages = DIV_ROUND_UP(data->xsize *
2674                                               info->matrix_ysize *
2675                                               sizeof(u16),
2676                                               sizeof(dbg->t37_buf->data));
2677
2678         dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
2679                                           sizeof(struct t37_debug), GFP_KERNEL);
2680         if (!dbg->t37_buf)
2681                 goto error;
2682
2683         /* init channel to zero */
2684         mxt_set_input(data, 0);
2685
2686         /* register video device */
2687         snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s", "atmel_mxt_ts");
2688         error = v4l2_device_register(&data->client->dev, &dbg->v4l2);
2689         if (error)
2690                 goto error;
2691
2692         /* initialize the queue */
2693         mutex_init(&dbg->lock);
2694         dbg->queue = mxt_queue;
2695         dbg->queue.drv_priv = data;
2696         dbg->queue.lock = &dbg->lock;
2697         dbg->queue.dev = &data->client->dev;
2698
2699         error = vb2_queue_init(&dbg->queue);
2700         if (error)
2701                 goto error_unreg_v4l2;
2702
2703         dbg->vdev = mxt_video_device;
2704         dbg->vdev.v4l2_dev = &dbg->v4l2;
2705         dbg->vdev.lock = &dbg->lock;
2706         dbg->vdev.vfl_dir = VFL_DIR_RX;
2707         dbg->vdev.queue = &dbg->queue;
2708         video_set_drvdata(&dbg->vdev, data);
2709
2710         error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1);
2711         if (error)
2712                 goto error_unreg_v4l2;
2713
2714         return;
2715
2716 error_unreg_v4l2:
2717         v4l2_device_unregister(&dbg->v4l2);
2718 error:
2719         dev_warn(&data->client->dev, "Error initializing T37\n");
2720 }
2721 #else
2722 static void mxt_debug_init(struct mxt_data *data)
2723 {
2724 }
2725 #endif
2726
2727 static int mxt_configure_objects(struct mxt_data *data,
2728                                  const struct firmware *cfg)
2729 {
2730         struct device *dev = &data->client->dev;
2731         int error;
2732
2733         error = mxt_init_t7_power_cfg(data);
2734         if (error) {
2735                 dev_err(dev, "Failed to initialize power cfg\n");
2736                 return error;
2737         }
2738
2739         if (cfg) {
2740                 error = mxt_update_cfg(data, cfg);
2741                 if (error)
2742                         dev_warn(dev, "Error %d updating config\n", error);
2743         }
2744
2745         if (data->multitouch) {
2746                 error = mxt_initialize_input_device(data);
2747                 if (error)
2748                         return error;
2749         } else {
2750                 dev_warn(dev, "No touch object detected\n");
2751         }
2752
2753         mxt_debug_init(data);
2754
2755         return 0;
2756 }
2757
2758 /* Firmware Version is returned as Major.Minor.Build */
2759 static ssize_t mxt_fw_version_show(struct device *dev,
2760                                    struct device_attribute *attr, char *buf)
2761 {
2762         struct mxt_data *data = dev_get_drvdata(dev);
2763         struct mxt_info *info = data->info;
2764         return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
2765                          info->version >> 4, info->version & 0xf, info->build);
2766 }
2767
2768 /* Hardware Version is returned as FamilyID.VariantID */
2769 static ssize_t mxt_hw_version_show(struct device *dev,
2770                                    struct device_attribute *attr, char *buf)
2771 {
2772         struct mxt_data *data = dev_get_drvdata(dev);
2773         struct mxt_info *info = data->info;
2774         return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
2775                          info->family_id, info->variant_id);
2776 }
2777
2778 static ssize_t mxt_show_instance(char *buf, int count,
2779                                  struct mxt_object *object, int instance,
2780                                  const u8 *val)
2781 {
2782         int i;
2783
2784         if (mxt_obj_instances(object) > 1)
2785                 count += scnprintf(buf + count, PAGE_SIZE - count,
2786                                    "Instance %u\n", instance);
2787
2788         for (i = 0; i < mxt_obj_size(object); i++)
2789                 count += scnprintf(buf + count, PAGE_SIZE - count,
2790                                 "\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
2791         count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
2792
2793         return count;
2794 }
2795
2796 static ssize_t mxt_object_show(struct device *dev,
2797                                     struct device_attribute *attr, char *buf)
2798 {
2799         struct mxt_data *data = dev_get_drvdata(dev);
2800         struct mxt_object *object;
2801         int count = 0;
2802         int i, j;
2803         int error;
2804         u8 *obuf;
2805
2806         /* Pre-allocate buffer large enough to hold max sized object. */
2807         obuf = kmalloc(256, GFP_KERNEL);
2808         if (!obuf)
2809                 return -ENOMEM;
2810
2811         error = 0;
2812         for (i = 0; i < data->info->object_num; i++) {
2813                 object = data->object_table + i;
2814
2815                 if (!mxt_object_readable(object->type))
2816                         continue;
2817
2818                 count += scnprintf(buf + count, PAGE_SIZE - count,
2819                                 "T%u:\n", object->type);
2820
2821                 for (j = 0; j < mxt_obj_instances(object); j++) {
2822                         u16 size = mxt_obj_size(object);
2823                         u16 addr = object->start_address + j * size;
2824
2825                         error = __mxt_read_reg(data->client, addr, size, obuf);
2826                         if (error)
2827                                 goto done;
2828
2829                         count = mxt_show_instance(buf, count, object, j, obuf);
2830                 }
2831         }
2832
2833 done:
2834         kfree(obuf);
2835         return error ?: count;
2836 }
2837
2838 static int mxt_check_firmware_format(struct device *dev,
2839                                      const struct firmware *fw)
2840 {
2841         unsigned int pos = 0;
2842         char c;
2843
2844         while (pos < fw->size) {
2845                 c = *(fw->data + pos);
2846
2847                 if (c < '0' || (c > '9' && c < 'A') || c > 'F')
2848                         return 0;
2849
2850                 pos++;
2851         }
2852
2853         /*
2854          * To convert file try:
2855          * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw
2856          */
2857         dev_err(dev, "Aborting: firmware file must be in binary format\n");
2858
2859         return -EINVAL;
2860 }
2861
2862 static int mxt_load_fw(struct device *dev, const char *fn)
2863 {
2864         struct mxt_data *data = dev_get_drvdata(dev);
2865         const struct firmware *fw = NULL;
2866         unsigned int frame_size;
2867         unsigned int pos = 0;
2868         unsigned int retry = 0;
2869         unsigned int frame = 0;
2870         int ret;
2871
2872         ret = request_firmware(&fw, fn, dev);
2873         if (ret) {
2874                 dev_err(dev, "Unable to open firmware %s\n", fn);
2875                 return ret;
2876         }
2877
2878         /* Check for incorrect enc file */
2879         ret = mxt_check_firmware_format(dev, fw);
2880         if (ret)
2881                 goto release_firmware;
2882
2883         if (!data->in_bootloader) {
2884                 /* Change to the bootloader mode */
2885                 data->in_bootloader = true;
2886
2887                 ret = mxt_t6_command(data, MXT_COMMAND_RESET,
2888                                      MXT_BOOT_VALUE, false);
2889                 if (ret)
2890                         goto release_firmware;
2891
2892                 msleep(MXT_RESET_TIME);
2893
2894                 /* Do not need to scan since we know family ID */
2895                 ret = mxt_lookup_bootloader_address(data, 0);
2896                 if (ret)
2897                         goto release_firmware;
2898
2899                 mxt_free_input_device(data);
2900                 mxt_free_object_table(data);
2901         } else {
2902                 enable_irq(data->irq);
2903         }
2904
2905         reinit_completion(&data->bl_completion);
2906
2907         ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
2908         if (ret) {
2909                 /* Bootloader may still be unlocked from previous attempt */
2910                 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false);
2911                 if (ret)
2912                         goto disable_irq;
2913         } else {
2914                 dev_info(dev, "Unlocking bootloader\n");
2915
2916                 /* Unlock bootloader */
2917                 ret = mxt_send_bootloader_cmd(data, true);
2918                 if (ret)
2919                         goto disable_irq;
2920         }
2921
2922         while (pos < fw->size) {
2923                 ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
2924                 if (ret)
2925                         goto disable_irq;
2926
2927                 frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
2928
2929                 /* Take account of CRC bytes */
2930                 frame_size += 2;
2931
2932                 /* Write one frame to device */
2933                 ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
2934                 if (ret)
2935                         goto disable_irq;
2936
2937                 ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
2938                 if (ret) {
2939                         retry++;
2940
2941                         /* Back off by 20ms per retry */
2942                         msleep(retry * 20);
2943
2944                         if (retry > 20) {
2945                                 dev_err(dev, "Retry count exceeded\n");
2946                                 goto disable_irq;
2947                         }
2948                 } else {
2949                         retry = 0;
2950                         pos += frame_size;
2951                         frame++;
2952                 }
2953
2954                 if (frame % 50 == 0)
2955                         dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
2956                                 frame, pos, fw->size);
2957         }
2958
2959         /* Wait for flash. */
2960         ret = mxt_wait_for_completion(data, &data->bl_completion,
2961                                       MXT_FW_RESET_TIME);
2962         if (ret)
2963                 goto disable_irq;
2964
2965         dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
2966
2967         /*
2968          * Wait for device to reset. Some bootloader versions do not assert
2969          * the CHG line after bootloading has finished, so ignore potential
2970          * errors.
2971          */
2972         mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME);
2973
2974         data->in_bootloader = false;
2975
2976 disable_irq:
2977         disable_irq(data->irq);
2978 release_firmware:
2979         release_firmware(fw);
2980         return ret;
2981 }
2982
2983 static ssize_t mxt_update_fw_store(struct device *dev,
2984                                         struct device_attribute *attr,
2985                                         const char *buf, size_t count)
2986 {
2987         struct mxt_data *data = dev_get_drvdata(dev);
2988         int error;
2989
2990         error = mxt_load_fw(dev, MXT_FW_NAME);
2991         if (error) {
2992                 dev_err(dev, "The firmware update failed(%d)\n", error);
2993                 count = error;
2994         } else {
2995                 dev_info(dev, "The firmware update succeeded\n");
2996
2997                 error = mxt_initialize(data);
2998                 if (error)
2999                         return error;
3000         }
3001
3002         return count;
3003 }
3004
3005 static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
3006 static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
3007 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
3008 static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
3009
3010 static struct attribute *mxt_attrs[] = {
3011         &dev_attr_fw_version.attr,
3012         &dev_attr_hw_version.attr,
3013         &dev_attr_object.attr,
3014         &dev_attr_update_fw.attr,
3015         NULL
3016 };
3017
3018 static const struct attribute_group mxt_attr_group = {
3019         .attrs = mxt_attrs,
3020 };
3021
3022 static void mxt_start(struct mxt_data *data)
3023 {
3024         mxt_wakeup_toggle(data->client, true, false);
3025
3026         switch (data->suspend_mode) {
3027         case MXT_SUSPEND_T9_CTRL:
3028                 mxt_soft_reset(data);
3029
3030                 /* Touch enable */
3031                 /* 0x83 = SCANEN | RPTEN | ENABLE */
3032                 mxt_write_object(data,
3033                                 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83);
3034                 break;
3035
3036         case MXT_SUSPEND_DEEP_SLEEP:
3037         default:
3038                 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN);
3039
3040                 /* Recalibrate since chip has been in deep sleep */
3041                 mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
3042                 break;
3043         }
3044 }
3045
3046 static void mxt_stop(struct mxt_data *data)
3047 {
3048         switch (data->suspend_mode) {
3049         case MXT_SUSPEND_T9_CTRL:
3050                 /* Touch disable */
3051                 mxt_write_object(data,
3052                                 MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0);
3053                 break;
3054
3055         case MXT_SUSPEND_DEEP_SLEEP:
3056         default:
3057                 mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP);
3058                 break;
3059         }
3060
3061         mxt_wakeup_toggle(data->client, false, false);
3062 }
3063
3064 static int mxt_input_open(struct input_dev *dev)
3065 {
3066         struct mxt_data *data = input_get_drvdata(dev);
3067
3068         mxt_start(data);
3069
3070         return 0;
3071 }
3072
3073 static void mxt_input_close(struct input_dev *dev)
3074 {
3075         struct mxt_data *data = input_get_drvdata(dev);
3076
3077         mxt_stop(data);
3078 }
3079
3080 static int mxt_parse_device_properties(struct mxt_data *data)
3081 {
3082         static const char keymap_property[] = "linux,gpio-keymap";
3083         struct device *dev = &data->client->dev;
3084         u32 *keymap;
3085         int n_keys;
3086         int error;
3087
3088         if (device_property_present(dev, keymap_property)) {
3089                 n_keys = device_property_count_u32(dev, keymap_property);
3090                 if (n_keys <= 0) {
3091                         error = n_keys < 0 ? n_keys : -EINVAL;
3092                         dev_err(dev, "invalid/malformed '%s' property: %d\n",
3093                                 keymap_property, error);
3094                         return error;
3095                 }
3096
3097                 keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap),
3098                                             GFP_KERNEL);
3099                 if (!keymap)
3100                         return -ENOMEM;
3101
3102                 error = device_property_read_u32_array(dev, keymap_property,
3103                                                        keymap, n_keys);
3104                 if (error) {
3105                         dev_err(dev, "failed to parse '%s' property: %d\n",
3106                                 keymap_property, error);
3107                         return error;
3108                 }
3109
3110                 data->t19_keymap = keymap;
3111                 data->t19_num_keys = n_keys;
3112         }
3113
3114         return 0;
3115 }
3116
3117 static const struct dmi_system_id chromebook_T9_suspend_dmi[] = {
3118         {
3119                 .matches = {
3120                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
3121                         DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
3122                 },
3123         },
3124         {
3125                 .matches = {
3126                         DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
3127                 },
3128         },
3129         { }
3130 };
3131
3132 static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
3133 {
3134         struct mxt_data *data;
3135         int error;
3136
3137         /*
3138          * Ignore devices that do not have device properties attached to
3139          * them, as we need help determining whether we are dealing with
3140          * touch screen or touchpad.
3141          *
3142          * So far on x86 the only users of Atmel touch controllers are
3143          * Chromebooks, and chromeos_laptop driver will ensure that
3144          * necessary properties are provided (if firmware does not do that).
3145          */
3146         if (!device_property_present(&client->dev, "compatible"))
3147                 return -ENXIO;
3148
3149         /*
3150          * Ignore ACPI devices representing bootloader mode.
3151          *
3152          * This is a bit of a hack: Google Chromebook BIOS creates ACPI
3153          * devices for both application and bootloader modes, but we are
3154          * interested in application mode only (if device is in bootloader
3155          * mode we'll end up switching into application anyway). So far
3156          * application mode addresses were all above 0x40, so we'll use it
3157          * as a threshold.
3158          */
3159         if (ACPI_COMPANION(&client->dev) && client->addr < 0x40)
3160                 return -ENXIO;
3161
3162         data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL);
3163         if (!data)
3164                 return -ENOMEM;
3165
3166         snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
3167                  client->adapter->nr, client->addr);
3168
3169         data->client = client;
3170         data->irq = client->irq;
3171         i2c_set_clientdata(client, data);
3172
3173         init_completion(&data->bl_completion);
3174         init_completion(&data->reset_completion);
3175         init_completion(&data->crc_completion);
3176
3177         data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ?
3178                 MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP;
3179
3180         error = mxt_parse_device_properties(data);
3181         if (error)
3182                 return error;
3183
3184         /*
3185          * VDDA is the analog voltage supply 2.57..3.47 V
3186          * VDD  is the digital voltage supply 1.71..3.47 V
3187          */
3188         data->regulators[0].supply = "vdda";
3189         data->regulators[1].supply = "vdd";
3190         error = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(data->regulators),
3191                                         data->regulators);
3192         if (error) {
3193                 if (error != -EPROBE_DEFER)
3194                         dev_err(&client->dev, "Failed to get regulators %d\n",
3195                                 error);
3196                 return error;
3197         }
3198
3199         /* Request the RESET line as asserted so we go into reset */
3200         data->reset_gpio = devm_gpiod_get_optional(&client->dev,
3201                                                    "reset", GPIOD_OUT_HIGH);
3202         if (IS_ERR(data->reset_gpio)) {
3203                 error = PTR_ERR(data->reset_gpio);
3204                 dev_err(&client->dev, "Failed to get reset gpio: %d\n", error);
3205                 return error;
3206         }
3207
3208         /* Request the WAKE line as asserted so we go out of sleep */
3209         data->wake_gpio = devm_gpiod_get_optional(&client->dev,
3210                                                   "wake", GPIOD_OUT_HIGH);
3211         if (IS_ERR(data->wake_gpio)) {
3212                 error = PTR_ERR(data->wake_gpio);
3213                 dev_err(&client->dev, "Failed to get wake gpio: %d\n", error);
3214                 return error;
3215         }
3216
3217         error = devm_request_threaded_irq(&client->dev, client->irq,
3218                                           NULL, mxt_interrupt,
3219                                           IRQF_ONESHOT | IRQF_NO_AUTOEN,
3220                                           client->name, data);
3221         if (error) {
3222                 dev_err(&client->dev, "Failed to register interrupt\n");
3223                 return error;
3224         }
3225
3226         error = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
3227                                       data->regulators);
3228         if (error) {
3229                 dev_err(&client->dev, "failed to enable regulators: %d\n",
3230                         error);
3231                 return error;
3232         }
3233         /*
3234          * The device takes 40ms to come up after power-on according
3235          * to the mXT224 datasheet, page 13.
3236          */
3237         msleep(MXT_BACKUP_TIME);
3238
3239         if (data->reset_gpio) {
3240                 /* Wait a while and then de-assert the RESET GPIO line */
3241                 msleep(MXT_RESET_GPIO_TIME);
3242                 gpiod_set_value(data->reset_gpio, 0);
3243                 msleep(MXT_RESET_INVALID_CHG);
3244         }
3245
3246         /*
3247          * Controllers like mXT1386 have a dedicated WAKE line that could be
3248          * connected to a GPIO or to I2C SCL pin, or permanently asserted low.
3249          *
3250          * This WAKE line is used for waking controller from a deep-sleep and
3251          * it needs to be asserted low for 25 milliseconds before I2C transfers
3252          * could be accepted by controller if it was in a deep-sleep mode.
3253          * Controller will go into sleep automatically after 2 seconds of
3254          * inactivity if WAKE line is deasserted and deep sleep is activated.
3255          *
3256          * If WAKE line is connected to I2C SCL pin, then the first I2C transfer
3257          * will get an instant NAK and transfer needs to be retried after 25ms.
3258          *
3259          * If WAKE line is connected to a GPIO line, the line must be asserted
3260          * 25ms before the host attempts to communicate with the controller.
3261          */
3262         device_property_read_u32(&client->dev, "atmel,wakeup-method",
3263                                  &data->wakeup_method);
3264
3265         error = mxt_initialize(data);
3266         if (error)
3267                 goto err_disable_regulators;
3268
3269         error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
3270         if (error) {
3271                 dev_err(&client->dev, "Failure %d creating sysfs group\n",
3272                         error);
3273                 goto err_free_object;
3274         }
3275
3276         return 0;
3277
3278 err_free_object:
3279         mxt_free_input_device(data);
3280         mxt_free_object_table(data);
3281 err_disable_regulators:
3282         regulator_bulk_disable(ARRAY_SIZE(data->regulators),
3283                                data->regulators);
3284         return error;
3285 }
3286
3287 static int mxt_remove(struct i2c_client *client)
3288 {
3289         struct mxt_data *data = i2c_get_clientdata(client);
3290
3291         disable_irq(data->irq);
3292         sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
3293         mxt_free_input_device(data);
3294         mxt_free_object_table(data);
3295         regulator_bulk_disable(ARRAY_SIZE(data->regulators),
3296                                data->regulators);
3297
3298         return 0;
3299 }
3300
3301 static int __maybe_unused mxt_suspend(struct device *dev)
3302 {
3303         struct i2c_client *client = to_i2c_client(dev);
3304         struct mxt_data *data = i2c_get_clientdata(client);
3305         struct input_dev *input_dev = data->input_dev;
3306
3307         if (!input_dev)
3308                 return 0;
3309
3310         mutex_lock(&input_dev->mutex);
3311
3312         if (input_device_enabled(input_dev))
3313                 mxt_stop(data);
3314
3315         mutex_unlock(&input_dev->mutex);
3316
3317         disable_irq(data->irq);
3318
3319         return 0;
3320 }
3321
3322 static int __maybe_unused mxt_resume(struct device *dev)
3323 {
3324         struct i2c_client *client = to_i2c_client(dev);
3325         struct mxt_data *data = i2c_get_clientdata(client);
3326         struct input_dev *input_dev = data->input_dev;
3327
3328         if (!input_dev)
3329                 return 0;
3330
3331         enable_irq(data->irq);
3332
3333         mutex_lock(&input_dev->mutex);
3334
3335         if (input_device_enabled(input_dev))
3336                 mxt_start(data);
3337
3338         mutex_unlock(&input_dev->mutex);
3339
3340         return 0;
3341 }
3342
3343 static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
3344
3345 static const struct of_device_id mxt_of_match[] = {
3346         { .compatible = "atmel,maxtouch", },
3347         /* Compatibles listed below are deprecated */
3348         { .compatible = "atmel,qt602240_ts", },
3349         { .compatible = "atmel,atmel_mxt_ts", },
3350         { .compatible = "atmel,atmel_mxt_tp", },
3351         { .compatible = "atmel,mXT224", },
3352         {},
3353 };
3354 MODULE_DEVICE_TABLE(of, mxt_of_match);
3355
3356 #ifdef CONFIG_ACPI
3357 static const struct acpi_device_id mxt_acpi_id[] = {
3358         { "ATML0000", 0 },      /* Touchpad */
3359         { "ATML0001", 0 },      /* Touchscreen */
3360         { }
3361 };
3362 MODULE_DEVICE_TABLE(acpi, mxt_acpi_id);
3363 #endif
3364
3365 static const struct i2c_device_id mxt_id[] = {
3366         { "qt602240_ts", 0 },
3367         { "atmel_mxt_ts", 0 },
3368         { "atmel_mxt_tp", 0 },
3369         { "maxtouch", 0 },
3370         { "mXT224", 0 },
3371         { }
3372 };
3373 MODULE_DEVICE_TABLE(i2c, mxt_id);
3374
3375 static struct i2c_driver mxt_driver = {
3376         .driver = {
3377                 .name   = "atmel_mxt_ts",
3378                 .of_match_table = mxt_of_match,
3379                 .acpi_match_table = ACPI_PTR(mxt_acpi_id),
3380                 .pm     = &mxt_pm_ops,
3381         },
3382         .probe          = mxt_probe,
3383         .remove         = mxt_remove,
3384         .id_table       = mxt_id,
3385 };
3386
3387 module_i2c_driver(mxt_driver);
3388
3389 /* Module information */
3390 MODULE_AUTHOR("Joonyoung Shim <[email protected]>");
3391 MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
3392 MODULE_LICENSE("GPL");