Javier Martinez Canillas | 4065d1e | 2012-01-31 00:18:00 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Core Source for: |
| 3 | * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers. |
| 4 | * For use with Cypress Txx3xx parts. |
| 5 | * Supported parts include: |
| 6 | * CY8CTST341 |
| 7 | * CY8CTMA340 |
| 8 | * |
| 9 | * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc. |
| 10 | * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * version 2, and only version 2, as published by the |
| 15 | * Free Software Foundation. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 25 | * |
| 26 | * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com> |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <linux/delay.h> |
| 31 | #include <linux/input.h> |
| 32 | #include <linux/input/mt.h> |
| 33 | #include <linux/gpio.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/slab.h> |
| 36 | |
| 37 | #include "cyttsp_core.h" |
| 38 | |
| 39 | /* Bootloader number of command keys */ |
| 40 | #define CY_NUM_BL_KEYS 8 |
| 41 | |
| 42 | /* helpers */ |
| 43 | #define GET_NUM_TOUCHES(x) ((x) & 0x0F) |
| 44 | #define IS_LARGE_AREA(x) (((x) & 0x10) >> 4) |
| 45 | #define IS_BAD_PKT(x) ((x) & 0x20) |
| 46 | #define IS_VALID_APP(x) ((x) & 0x01) |
| 47 | #define IS_OPERATIONAL_ERR(x) ((x) & 0x3F) |
| 48 | #define GET_HSTMODE(reg) (((reg) & 0x70) >> 4) |
| 49 | #define GET_BOOTLOADERMODE(reg) (((reg) & 0x10) >> 4) |
| 50 | |
| 51 | #define CY_REG_BASE 0x00 |
| 52 | #define CY_REG_ACT_DIST 0x1E |
| 53 | #define CY_REG_ACT_INTRVL 0x1D |
| 54 | #define CY_REG_TCH_TMOUT (CY_REG_ACT_INTRVL + 1) |
| 55 | #define CY_REG_LP_INTRVL (CY_REG_TCH_TMOUT + 1) |
| 56 | #define CY_MAXZ 255 |
| 57 | #define CY_DELAY_DFLT 20 /* ms */ |
| 58 | #define CY_DELAY_MAX 500 |
| 59 | #define CY_ACT_DIST_DFLT 0xF8 |
| 60 | #define CY_HNDSHK_BIT 0x80 |
| 61 | /* device mode bits */ |
| 62 | #define CY_OPERATE_MODE 0x00 |
| 63 | #define CY_SYSINFO_MODE 0x10 |
| 64 | /* power mode select bits */ |
| 65 | #define CY_SOFT_RESET_MODE 0x01 /* return to Bootloader mode */ |
| 66 | #define CY_DEEP_SLEEP_MODE 0x02 |
| 67 | #define CY_LOW_POWER_MODE 0x04 |
| 68 | |
| 69 | /* Slots management */ |
| 70 | #define CY_MAX_FINGER 4 |
| 71 | #define CY_MAX_ID 16 |
| 72 | |
| 73 | static const u8 bl_command[] = { |
| 74 | 0x00, /* file offset */ |
| 75 | 0xFF, /* command */ |
| 76 | 0xA5, /* exit bootloader command */ |
| 77 | 0, 1, 2, 3, 4, 5, 6, 7 /* default keys */ |
| 78 | }; |
| 79 | |
| 80 | static int ttsp_read_block_data(struct cyttsp *ts, u8 command, |
| 81 | u8 length, void *buf) |
| 82 | { |
| 83 | int error; |
| 84 | int tries; |
| 85 | |
| 86 | for (tries = 0; tries < CY_NUM_RETRY; tries++) { |
| 87 | error = ts->bus_ops->read(ts, command, length, buf); |
| 88 | if (!error) |
| 89 | return 0; |
| 90 | |
| 91 | msleep(CY_DELAY_DFLT); |
| 92 | } |
| 93 | |
| 94 | return -EIO; |
| 95 | } |
| 96 | |
| 97 | static int ttsp_write_block_data(struct cyttsp *ts, u8 command, |
| 98 | u8 length, void *buf) |
| 99 | { |
| 100 | int error; |
| 101 | int tries; |
| 102 | |
| 103 | for (tries = 0; tries < CY_NUM_RETRY; tries++) { |
| 104 | error = ts->bus_ops->write(ts, command, length, buf); |
| 105 | if (!error) |
| 106 | return 0; |
| 107 | |
| 108 | msleep(CY_DELAY_DFLT); |
| 109 | } |
| 110 | |
| 111 | return -EIO; |
| 112 | } |
| 113 | |
| 114 | static int ttsp_send_command(struct cyttsp *ts, u8 cmd) |
| 115 | { |
| 116 | return ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd); |
| 117 | } |
| 118 | |
| 119 | static int cyttsp_load_bl_regs(struct cyttsp *ts) |
| 120 | { |
| 121 | memset(&ts->bl_data, 0, sizeof(ts->bl_data)); |
| 122 | ts->bl_data.bl_status = 0x10; |
| 123 | |
| 124 | return ttsp_read_block_data(ts, CY_REG_BASE, |
| 125 | sizeof(ts->bl_data), &ts->bl_data); |
| 126 | } |
| 127 | |
| 128 | static int cyttsp_exit_bl_mode(struct cyttsp *ts) |
| 129 | { |
| 130 | int error; |
| 131 | u8 bl_cmd[sizeof(bl_command)]; |
| 132 | |
| 133 | memcpy(bl_cmd, bl_command, sizeof(bl_command)); |
| 134 | if (ts->pdata->bl_keys) |
| 135 | memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS], |
| 136 | ts->pdata->bl_keys, sizeof(bl_command)); |
| 137 | |
| 138 | error = ttsp_write_block_data(ts, CY_REG_BASE, |
| 139 | sizeof(bl_cmd), bl_cmd); |
| 140 | if (error) |
| 141 | return error; |
| 142 | |
| 143 | /* wait for TTSP Device to complete the operation */ |
| 144 | msleep(CY_DELAY_DFLT); |
| 145 | |
| 146 | error = cyttsp_load_bl_regs(ts); |
| 147 | if (error) |
| 148 | return error; |
| 149 | |
| 150 | if (GET_BOOTLOADERMODE(ts->bl_data.bl_status)) |
| 151 | return -EIO; |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static int cyttsp_set_operational_mode(struct cyttsp *ts) |
| 157 | { |
| 158 | int error; |
| 159 | |
| 160 | error = ttsp_send_command(ts, CY_OPERATE_MODE); |
| 161 | if (error) |
| 162 | return error; |
| 163 | |
| 164 | /* wait for TTSP Device to complete switch to Operational mode */ |
| 165 | error = ttsp_read_block_data(ts, CY_REG_BASE, |
| 166 | sizeof(ts->xy_data), &ts->xy_data); |
| 167 | if (error) |
| 168 | return error; |
| 169 | |
| 170 | return ts->xy_data.act_dist == CY_ACT_DIST_DFLT ? -EIO : 0; |
| 171 | } |
| 172 | |
| 173 | static int cyttsp_set_sysinfo_mode(struct cyttsp *ts) |
| 174 | { |
| 175 | int error; |
| 176 | |
| 177 | memset(&ts->sysinfo_data, 0, sizeof(ts->sysinfo_data)); |
| 178 | |
| 179 | /* switch to sysinfo mode */ |
| 180 | error = ttsp_send_command(ts, CY_SYSINFO_MODE); |
| 181 | if (error) |
| 182 | return error; |
| 183 | |
| 184 | /* read sysinfo registers */ |
| 185 | msleep(CY_DELAY_DFLT); |
| 186 | error = ttsp_read_block_data(ts, CY_REG_BASE, sizeof(ts->sysinfo_data), |
| 187 | &ts->sysinfo_data); |
| 188 | if (error) |
| 189 | return error; |
| 190 | |
| 191 | if (!ts->sysinfo_data.tts_verh && !ts->sysinfo_data.tts_verl) |
| 192 | return -EIO; |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | static int cyttsp_set_sysinfo_regs(struct cyttsp *ts) |
| 198 | { |
| 199 | int retval = 0; |
| 200 | |
| 201 | if (ts->pdata->act_intrvl != CY_ACT_INTRVL_DFLT || |
| 202 | ts->pdata->tch_tmout != CY_TCH_TMOUT_DFLT || |
| 203 | ts->pdata->lp_intrvl != CY_LP_INTRVL_DFLT) { |
| 204 | |
| 205 | u8 intrvl_ray[] = { |
| 206 | ts->pdata->act_intrvl, |
| 207 | ts->pdata->tch_tmout, |
| 208 | ts->pdata->lp_intrvl |
| 209 | }; |
| 210 | |
| 211 | /* set intrvl registers */ |
| 212 | retval = ttsp_write_block_data(ts, CY_REG_ACT_INTRVL, |
| 213 | sizeof(intrvl_ray), intrvl_ray); |
| 214 | msleep(CY_DELAY_DFLT); |
| 215 | } |
| 216 | |
| 217 | return retval; |
| 218 | } |
| 219 | |
| 220 | static int cyttsp_soft_reset(struct cyttsp *ts) |
| 221 | { |
| 222 | unsigned long timeout; |
| 223 | int retval; |
| 224 | |
| 225 | /* wait for interrupt to set ready completion */ |
| 226 | INIT_COMPLETION(ts->bl_ready); |
| 227 | ts->state = CY_BL_STATE; |
| 228 | |
| 229 | enable_irq(ts->irq); |
| 230 | |
| 231 | retval = ttsp_send_command(ts, CY_SOFT_RESET_MODE); |
| 232 | if (retval) |
| 233 | goto out; |
| 234 | |
| 235 | timeout = wait_for_completion_timeout(&ts->bl_ready, |
| 236 | msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX)); |
| 237 | retval = timeout ? 0 : -EIO; |
| 238 | |
| 239 | out: |
| 240 | ts->state = CY_IDLE_STATE; |
| 241 | disable_irq(ts->irq); |
| 242 | return retval; |
| 243 | } |
| 244 | |
| 245 | static int cyttsp_act_dist_setup(struct cyttsp *ts) |
| 246 | { |
| 247 | u8 act_dist_setup = ts->pdata->act_dist; |
| 248 | |
| 249 | /* Init gesture; active distance setup */ |
| 250 | return ttsp_write_block_data(ts, CY_REG_ACT_DIST, |
| 251 | sizeof(act_dist_setup), &act_dist_setup); |
| 252 | } |
| 253 | |
| 254 | static void cyttsp_extract_track_ids(struct cyttsp_xydata *xy_data, int *ids) |
| 255 | { |
| 256 | ids[0] = xy_data->touch12_id >> 4; |
| 257 | ids[1] = xy_data->touch12_id & 0xF; |
| 258 | ids[2] = xy_data->touch34_id >> 4; |
| 259 | ids[3] = xy_data->touch34_id & 0xF; |
| 260 | } |
| 261 | |
| 262 | static const struct cyttsp_tch *cyttsp_get_tch(struct cyttsp_xydata *xy_data, |
| 263 | int idx) |
| 264 | { |
| 265 | switch (idx) { |
| 266 | case 0: |
| 267 | return &xy_data->tch1; |
| 268 | case 1: |
| 269 | return &xy_data->tch2; |
| 270 | case 2: |
| 271 | return &xy_data->tch3; |
| 272 | case 3: |
| 273 | return &xy_data->tch4; |
| 274 | default: |
| 275 | return NULL; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | static void cyttsp_report_tchdata(struct cyttsp *ts) |
| 280 | { |
| 281 | struct cyttsp_xydata *xy_data = &ts->xy_data; |
| 282 | struct input_dev *input = ts->input; |
| 283 | int num_tch = GET_NUM_TOUCHES(xy_data->tt_stat); |
| 284 | const struct cyttsp_tch *tch; |
| 285 | int ids[CY_MAX_ID]; |
| 286 | int i; |
| 287 | DECLARE_BITMAP(used, CY_MAX_ID); |
| 288 | |
| 289 | if (IS_LARGE_AREA(xy_data->tt_stat) == 1) { |
| 290 | /* terminate all active tracks */ |
| 291 | num_tch = 0; |
| 292 | dev_dbg(ts->dev, "%s: Large area detected\n", __func__); |
| 293 | } else if (num_tch > CY_MAX_FINGER) { |
| 294 | /* terminate all active tracks */ |
| 295 | num_tch = 0; |
| 296 | dev_dbg(ts->dev, "%s: Num touch error detected\n", __func__); |
| 297 | } else if (IS_BAD_PKT(xy_data->tt_mode)) { |
| 298 | /* terminate all active tracks */ |
| 299 | num_tch = 0; |
| 300 | dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__); |
| 301 | } |
| 302 | |
| 303 | cyttsp_extract_track_ids(xy_data, ids); |
| 304 | |
| 305 | bitmap_zero(used, CY_MAX_ID); |
| 306 | |
| 307 | for (i = 0; i < num_tch; i++) { |
| 308 | tch = cyttsp_get_tch(xy_data, i); |
| 309 | |
| 310 | input_mt_slot(input, ids[i]); |
| 311 | input_mt_report_slot_state(input, MT_TOOL_FINGER, true); |
| 312 | input_report_abs(input, ABS_MT_POSITION_X, be16_to_cpu(tch->x)); |
| 313 | input_report_abs(input, ABS_MT_POSITION_Y, be16_to_cpu(tch->y)); |
| 314 | input_report_abs(input, ABS_MT_TOUCH_MAJOR, tch->z); |
| 315 | |
| 316 | __set_bit(ids[i], used); |
| 317 | } |
| 318 | |
| 319 | for (i = 0; i < CY_MAX_ID; i++) { |
| 320 | if (test_bit(i, used)) |
| 321 | continue; |
| 322 | |
| 323 | input_mt_slot(input, i); |
| 324 | input_mt_report_slot_state(input, MT_TOOL_FINGER, false); |
| 325 | } |
| 326 | |
| 327 | input_sync(input); |
| 328 | } |
| 329 | |
| 330 | static irqreturn_t cyttsp_irq(int irq, void *handle) |
| 331 | { |
| 332 | struct cyttsp *ts = handle; |
| 333 | int error; |
| 334 | |
| 335 | if (unlikely(ts->state == CY_BL_STATE)) { |
| 336 | complete(&ts->bl_ready); |
| 337 | goto out; |
| 338 | } |
| 339 | |
| 340 | /* Get touch data from CYTTSP device */ |
| 341 | error = ttsp_read_block_data(ts, CY_REG_BASE, |
| 342 | sizeof(struct cyttsp_xydata), &ts->xy_data); |
| 343 | if (error) |
| 344 | goto out; |
| 345 | |
| 346 | /* provide flow control handshake */ |
| 347 | if (ts->pdata->use_hndshk) { |
| 348 | error = ttsp_send_command(ts, |
| 349 | ts->xy_data.hst_mode ^ CY_HNDSHK_BIT); |
| 350 | if (error) |
| 351 | goto out; |
| 352 | } |
| 353 | |
| 354 | if (unlikely(ts->state == CY_IDLE_STATE)) |
| 355 | goto out; |
| 356 | |
| 357 | if (GET_BOOTLOADERMODE(ts->xy_data.tt_mode)) { |
| 358 | /* |
| 359 | * TTSP device has reset back to bootloader mode. |
| 360 | * Restore to operational mode. |
| 361 | */ |
| 362 | error = cyttsp_exit_bl_mode(ts); |
| 363 | if (error) { |
| 364 | dev_err(ts->dev, |
| 365 | "Could not return to operational mode, err: %d\n", |
| 366 | error); |
| 367 | ts->state = CY_IDLE_STATE; |
| 368 | } |
| 369 | } else { |
| 370 | cyttsp_report_tchdata(ts); |
| 371 | } |
| 372 | |
| 373 | out: |
| 374 | return IRQ_HANDLED; |
| 375 | } |
| 376 | |
| 377 | static int cyttsp_power_on(struct cyttsp *ts) |
| 378 | { |
| 379 | int error; |
| 380 | |
| 381 | error = cyttsp_soft_reset(ts); |
| 382 | if (error) |
| 383 | return error; |
| 384 | |
| 385 | error = cyttsp_load_bl_regs(ts); |
| 386 | if (error) |
| 387 | return error; |
| 388 | |
| 389 | if (GET_BOOTLOADERMODE(ts->bl_data.bl_status) && |
| 390 | IS_VALID_APP(ts->bl_data.bl_status)) { |
| 391 | error = cyttsp_exit_bl_mode(ts); |
| 392 | if (error) |
| 393 | return error; |
| 394 | } |
| 395 | |
| 396 | if (GET_HSTMODE(ts->bl_data.bl_file) != CY_OPERATE_MODE || |
| 397 | IS_OPERATIONAL_ERR(ts->bl_data.bl_status)) { |
| 398 | return -ENODEV; |
| 399 | } |
| 400 | |
| 401 | error = cyttsp_set_sysinfo_mode(ts); |
| 402 | if (error) |
| 403 | return error; |
| 404 | |
| 405 | error = cyttsp_set_sysinfo_regs(ts); |
| 406 | if (error) |
| 407 | return error; |
| 408 | |
| 409 | error = cyttsp_set_operational_mode(ts); |
| 410 | if (error) |
| 411 | return error; |
| 412 | |
| 413 | /* init active distance */ |
| 414 | error = cyttsp_act_dist_setup(ts); |
| 415 | if (error) |
| 416 | return error; |
| 417 | |
| 418 | ts->state = CY_ACTIVE_STATE; |
| 419 | |
| 420 | return 0; |
| 421 | } |
| 422 | |
| 423 | static int cyttsp_enable(struct cyttsp *ts) |
| 424 | { |
| 425 | int error; |
| 426 | |
| 427 | /* |
| 428 | * The device firmware can wake on an I2C or SPI memory slave |
| 429 | * address match. So just reading a register is sufficient to |
| 430 | * wake up the device. The first read attempt will fail but it |
| 431 | * will wake it up making the second read attempt successful. |
| 432 | */ |
| 433 | error = ttsp_read_block_data(ts, CY_REG_BASE, |
| 434 | sizeof(ts->xy_data), &ts->xy_data); |
| 435 | if (error) |
| 436 | return error; |
| 437 | |
| 438 | if (GET_HSTMODE(ts->xy_data.hst_mode)) |
| 439 | return -EIO; |
| 440 | |
| 441 | enable_irq(ts->irq); |
| 442 | |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int cyttsp_disable(struct cyttsp *ts) |
| 447 | { |
| 448 | int error; |
| 449 | |
| 450 | error = ttsp_send_command(ts, CY_LOW_POWER_MODE); |
| 451 | if (error) |
| 452 | return error; |
| 453 | |
| 454 | disable_irq(ts->irq); |
| 455 | |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | #ifdef CONFIG_PM_SLEEP |
| 460 | static int cyttsp_suspend(struct device *dev) |
| 461 | { |
| 462 | struct cyttsp *ts = dev_get_drvdata(dev); |
| 463 | int retval = 0; |
| 464 | |
| 465 | mutex_lock(&ts->input->mutex); |
| 466 | |
| 467 | if (ts->input->users) { |
| 468 | retval = cyttsp_disable(ts); |
| 469 | if (retval == 0) |
| 470 | ts->suspended = true; |
| 471 | } |
| 472 | |
| 473 | mutex_unlock(&ts->input->mutex); |
| 474 | |
| 475 | return retval; |
| 476 | } |
| 477 | |
| 478 | static int cyttsp_resume(struct device *dev) |
| 479 | { |
| 480 | struct cyttsp *ts = dev_get_drvdata(dev); |
| 481 | |
| 482 | mutex_lock(&ts->input->mutex); |
| 483 | |
| 484 | if (ts->input->users) |
| 485 | cyttsp_enable(ts); |
| 486 | |
| 487 | ts->suspended = false; |
| 488 | |
| 489 | mutex_unlock(&ts->input->mutex); |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | #endif |
| 495 | |
| 496 | SIMPLE_DEV_PM_OPS(cyttsp_pm_ops, cyttsp_suspend, cyttsp_resume); |
| 497 | EXPORT_SYMBOL_GPL(cyttsp_pm_ops); |
| 498 | |
| 499 | static int cyttsp_open(struct input_dev *dev) |
| 500 | { |
| 501 | struct cyttsp *ts = input_get_drvdata(dev); |
| 502 | int retval = 0; |
| 503 | |
| 504 | if (!ts->suspended) |
| 505 | retval = cyttsp_enable(ts); |
| 506 | |
| 507 | return retval; |
| 508 | } |
| 509 | |
| 510 | static void cyttsp_close(struct input_dev *dev) |
| 511 | { |
| 512 | struct cyttsp *ts = input_get_drvdata(dev); |
| 513 | |
| 514 | if (!ts->suspended) |
| 515 | cyttsp_disable(ts); |
| 516 | } |
| 517 | |
| 518 | struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops, |
| 519 | struct device *dev, int irq, size_t xfer_buf_size) |
| 520 | { |
| 521 | const struct cyttsp_platform_data *pdata = dev->platform_data; |
| 522 | struct cyttsp *ts; |
| 523 | struct input_dev *input_dev; |
| 524 | int error; |
| 525 | |
Dmitry Torokhov | aaa60fa | 2012-03-04 09:26:15 -0800 | [diff] [blame] | 526 | if (!pdata || !pdata->name || irq <= 0) { |
Javier Martinez Canillas | 4065d1e | 2012-01-31 00:18:00 -0800 | [diff] [blame] | 527 | error = -EINVAL; |
| 528 | goto err_out; |
| 529 | } |
| 530 | |
| 531 | ts = kzalloc(sizeof(*ts) + xfer_buf_size, GFP_KERNEL); |
| 532 | input_dev = input_allocate_device(); |
| 533 | if (!ts || !input_dev) { |
| 534 | error = -ENOMEM; |
| 535 | goto err_free_mem; |
| 536 | } |
| 537 | |
| 538 | ts->dev = dev; |
| 539 | ts->input = input_dev; |
| 540 | ts->pdata = dev->platform_data; |
| 541 | ts->bus_ops = bus_ops; |
| 542 | ts->irq = irq; |
| 543 | |
| 544 | init_completion(&ts->bl_ready); |
| 545 | snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); |
| 546 | |
| 547 | if (pdata->init) { |
| 548 | error = pdata->init(); |
| 549 | if (error) { |
| 550 | dev_err(ts->dev, "platform init failed, err: %d\n", |
| 551 | error); |
| 552 | goto err_free_mem; |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | input_dev->name = pdata->name; |
| 557 | input_dev->phys = ts->phys; |
| 558 | input_dev->id.bustype = bus_ops->bustype; |
| 559 | input_dev->dev.parent = ts->dev; |
| 560 | |
| 561 | input_dev->open = cyttsp_open; |
| 562 | input_dev->close = cyttsp_close; |
| 563 | |
| 564 | input_set_drvdata(input_dev, ts); |
| 565 | |
| 566 | __set_bit(EV_ABS, input_dev->evbit); |
| 567 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
| 568 | 0, pdata->maxx, 0, 0); |
| 569 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
| 570 | 0, pdata->maxy, 0, 0); |
| 571 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
| 572 | 0, CY_MAXZ, 0, 0); |
| 573 | |
| 574 | input_mt_init_slots(input_dev, CY_MAX_ID); |
| 575 | |
| 576 | error = request_threaded_irq(ts->irq, NULL, cyttsp_irq, |
| 577 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 578 | pdata->name, ts); |
| 579 | if (error) { |
| 580 | dev_err(ts->dev, "failed to request IRQ %d, err: %d\n", |
| 581 | ts->irq, error); |
| 582 | goto err_platform_exit; |
| 583 | } |
| 584 | |
| 585 | disable_irq(ts->irq); |
| 586 | |
| 587 | error = cyttsp_power_on(ts); |
| 588 | if (error) |
| 589 | goto err_free_irq; |
| 590 | |
| 591 | error = input_register_device(input_dev); |
| 592 | if (error) { |
| 593 | dev_err(ts->dev, "failed to register input device: %d\n", |
| 594 | error); |
| 595 | goto err_free_irq; |
| 596 | } |
| 597 | |
| 598 | return ts; |
| 599 | |
| 600 | err_free_irq: |
| 601 | free_irq(ts->irq, ts); |
| 602 | err_platform_exit: |
| 603 | if (pdata->exit) |
| 604 | pdata->exit(); |
| 605 | err_free_mem: |
| 606 | input_free_device(input_dev); |
| 607 | kfree(ts); |
| 608 | err_out: |
| 609 | return ERR_PTR(error); |
| 610 | } |
| 611 | EXPORT_SYMBOL_GPL(cyttsp_probe); |
| 612 | |
| 613 | void cyttsp_remove(struct cyttsp *ts) |
| 614 | { |
| 615 | free_irq(ts->irq, ts); |
| 616 | input_unregister_device(ts->input); |
| 617 | if (ts->pdata->exit) |
| 618 | ts->pdata->exit(); |
| 619 | kfree(ts); |
| 620 | } |
| 621 | EXPORT_SYMBOL_GPL(cyttsp_remove); |
| 622 | |
| 623 | MODULE_LICENSE("GPL"); |
| 624 | MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core"); |
| 625 | MODULE_AUTHOR("Cypress"); |