Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Driver for AUO in-cell touchscreens |
| 3 | * |
| 4 | * Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de> |
| 5 | * |
| 6 | * loosely based on auo_touch.c from Dell Streak vendor-kernel |
| 7 | * |
| 8 | * Copyright (c) 2008 QUALCOMM Incorporated. |
| 9 | * Copyright (c) 2008 QUALCOMM USA, INC. |
| 10 | * |
| 11 | * |
| 12 | * This software is licensed under the terms of the GNU General Public |
| 13 | * License version 2, as published by the Free Software Foundation, and |
| 14 | * may be copied, distributed, and modified under those terms. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/input.h> |
| 28 | #include <linux/jiffies.h> |
| 29 | #include <linux/i2c.h> |
| 30 | #include <linux/mutex.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/gpio.h> |
| 33 | #include <linux/input/auo-pixcir-ts.h> |
Heiko Stübner | 7241443f | 2013-02-23 12:08:55 -0800 | [diff] [blame] | 34 | #include <linux/of.h> |
| 35 | #include <linux/of_gpio.h> |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 36 | |
| 37 | /* |
| 38 | * Coordinate calculation: |
| 39 | * X1 = X1_LSB + X1_MSB*256 |
| 40 | * Y1 = Y1_LSB + Y1_MSB*256 |
| 41 | * X2 = X2_LSB + X2_MSB*256 |
| 42 | * Y2 = Y2_LSB + Y2_MSB*256 |
| 43 | */ |
| 44 | #define AUO_PIXCIR_REG_X1_LSB 0x00 |
| 45 | #define AUO_PIXCIR_REG_X1_MSB 0x01 |
| 46 | #define AUO_PIXCIR_REG_Y1_LSB 0x02 |
| 47 | #define AUO_PIXCIR_REG_Y1_MSB 0x03 |
| 48 | #define AUO_PIXCIR_REG_X2_LSB 0x04 |
| 49 | #define AUO_PIXCIR_REG_X2_MSB 0x05 |
| 50 | #define AUO_PIXCIR_REG_Y2_LSB 0x06 |
| 51 | #define AUO_PIXCIR_REG_Y2_MSB 0x07 |
| 52 | |
| 53 | #define AUO_PIXCIR_REG_STRENGTH 0x0d |
| 54 | #define AUO_PIXCIR_REG_STRENGTH_X1_LSB 0x0e |
| 55 | #define AUO_PIXCIR_REG_STRENGTH_X1_MSB 0x0f |
| 56 | |
| 57 | #define AUO_PIXCIR_REG_RAW_DATA_X 0x2b |
| 58 | #define AUO_PIXCIR_REG_RAW_DATA_Y 0x4f |
| 59 | |
| 60 | #define AUO_PIXCIR_REG_X_SENSITIVITY 0x6f |
| 61 | #define AUO_PIXCIR_REG_Y_SENSITIVITY 0x70 |
| 62 | #define AUO_PIXCIR_REG_INT_SETTING 0x71 |
| 63 | #define AUO_PIXCIR_REG_INT_WIDTH 0x72 |
| 64 | #define AUO_PIXCIR_REG_POWER_MODE 0x73 |
| 65 | |
| 66 | #define AUO_PIXCIR_REG_VERSION 0x77 |
| 67 | #define AUO_PIXCIR_REG_CALIBRATE 0x78 |
| 68 | |
| 69 | #define AUO_PIXCIR_REG_TOUCHAREA_X1 0x1e |
| 70 | #define AUO_PIXCIR_REG_TOUCHAREA_Y1 0x1f |
| 71 | #define AUO_PIXCIR_REG_TOUCHAREA_X2 0x20 |
| 72 | #define AUO_PIXCIR_REG_TOUCHAREA_Y2 0x21 |
| 73 | |
| 74 | #define AUO_PIXCIR_REG_EEPROM_CALIB_X 0x42 |
| 75 | #define AUO_PIXCIR_REG_EEPROM_CALIB_Y 0xad |
| 76 | |
| 77 | #define AUO_PIXCIR_INT_TPNUM_MASK 0xe0 |
| 78 | #define AUO_PIXCIR_INT_TPNUM_SHIFT 5 |
| 79 | #define AUO_PIXCIR_INT_RELEASE (1 << 4) |
| 80 | #define AUO_PIXCIR_INT_ENABLE (1 << 3) |
| 81 | #define AUO_PIXCIR_INT_POL_HIGH (1 << 2) |
| 82 | #define AUO_PIXCIR_INT_MODE_MASK 0x03 |
| 83 | |
| 84 | /* |
| 85 | * Power modes: |
| 86 | * active: scan speed 60Hz |
| 87 | * sleep: scan speed 10Hz can be auto-activated, wakeup on 1st touch |
| 88 | * deep sleep: scan speed 1Hz can only be entered or left manually. |
| 89 | */ |
| 90 | #define AUO_PIXCIR_POWER_ACTIVE 0x00 |
| 91 | #define AUO_PIXCIR_POWER_SLEEP 0x01 |
| 92 | #define AUO_PIXCIR_POWER_DEEP_SLEEP 0x02 |
| 93 | #define AUO_PIXCIR_POWER_MASK 0x03 |
| 94 | |
| 95 | #define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2) |
| 96 | #define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4) |
| 97 | |
| 98 | #define AUO_PIXCIR_CALIBRATE 0x03 |
| 99 | |
| 100 | #define AUO_PIXCIR_EEPROM_CALIB_X_LEN 62 |
| 101 | #define AUO_PIXCIR_EEPROM_CALIB_Y_LEN 36 |
| 102 | |
| 103 | #define AUO_PIXCIR_RAW_DATA_X_LEN 18 |
| 104 | #define AUO_PIXCIR_RAW_DATA_Y_LEN 11 |
| 105 | |
| 106 | #define AUO_PIXCIR_STRENGTH_ENABLE (1 << 0) |
| 107 | |
| 108 | /* Touchscreen absolute values */ |
| 109 | #define AUO_PIXCIR_REPORT_POINTS 2 |
| 110 | #define AUO_PIXCIR_MAX_AREA 0xff |
| 111 | #define AUO_PIXCIR_PENUP_TIMEOUT_MS 10 |
| 112 | |
| 113 | struct auo_pixcir_ts { |
| 114 | struct i2c_client *client; |
| 115 | struct input_dev *input; |
Heiko Stübner | 38e83f7 | 2013-02-23 12:06:48 -0800 | [diff] [blame] | 116 | const struct auo_pixcir_ts_platdata *pdata; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 117 | char phys[32]; |
| 118 | |
| 119 | /* special handling for touch_indicate interupt mode */ |
| 120 | bool touch_ind_mode; |
| 121 | |
| 122 | wait_queue_head_t wait; |
| 123 | bool stopped; |
| 124 | }; |
| 125 | |
| 126 | struct auo_point_t { |
| 127 | int coord_x; |
| 128 | int coord_y; |
| 129 | int area_major; |
| 130 | int area_minor; |
| 131 | int orientation; |
| 132 | }; |
| 133 | |
| 134 | static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts, |
| 135 | struct auo_point_t *point) |
| 136 | { |
| 137 | struct i2c_client *client = ts->client; |
Heiko Stübner | 38e83f7 | 2013-02-23 12:06:48 -0800 | [diff] [blame] | 138 | const struct auo_pixcir_ts_platdata *pdata = ts->pdata; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 139 | uint8_t raw_coord[8]; |
| 140 | uint8_t raw_area[4]; |
| 141 | int i, ret; |
| 142 | |
| 143 | /* touch coordinates */ |
| 144 | ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB, |
| 145 | 8, raw_coord); |
| 146 | if (ret < 0) { |
| 147 | dev_err(&client->dev, "failed to read coordinate, %d\n", ret); |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | /* touch area */ |
| 152 | ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1, |
| 153 | 4, raw_area); |
| 154 | if (ret < 0) { |
| 155 | dev_err(&client->dev, "could not read touch area, %d\n", ret); |
| 156 | return ret; |
| 157 | } |
| 158 | |
| 159 | for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { |
| 160 | point[i].coord_x = |
| 161 | raw_coord[4 * i + 1] << 8 | raw_coord[4 * i]; |
| 162 | point[i].coord_y = |
| 163 | raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2]; |
| 164 | |
| 165 | if (point[i].coord_x > pdata->x_max || |
| 166 | point[i].coord_y > pdata->y_max) { |
| 167 | dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", |
| 168 | point[i].coord_x, point[i].coord_y); |
| 169 | point[i].coord_x = point[i].coord_y = 0; |
| 170 | } |
| 171 | |
| 172 | /* determine touch major, minor and orientation */ |
| 173 | point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]); |
| 174 | point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]); |
| 175 | point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1]; |
| 176 | } |
| 177 | |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id) |
| 182 | { |
| 183 | struct auo_pixcir_ts *ts = dev_id; |
Heiko Stübner | 38e83f7 | 2013-02-23 12:06:48 -0800 | [diff] [blame] | 184 | const struct auo_pixcir_ts_platdata *pdata = ts->pdata; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 185 | struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS]; |
| 186 | int i; |
| 187 | int ret; |
| 188 | int fingers = 0; |
| 189 | int abs = -1; |
| 190 | |
| 191 | while (!ts->stopped) { |
| 192 | |
| 193 | /* check for up event in touch touch_ind_mode */ |
| 194 | if (ts->touch_ind_mode) { |
| 195 | if (gpio_get_value(pdata->gpio_int) == 0) { |
| 196 | input_mt_sync(ts->input); |
| 197 | input_report_key(ts->input, BTN_TOUCH, 0); |
| 198 | input_sync(ts->input); |
| 199 | break; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | ret = auo_pixcir_collect_data(ts, point); |
| 204 | if (ret < 0) { |
| 205 | /* we want to loop only in touch_ind_mode */ |
| 206 | if (!ts->touch_ind_mode) |
| 207 | break; |
| 208 | |
| 209 | wait_event_timeout(ts->wait, ts->stopped, |
| 210 | msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); |
| 211 | continue; |
| 212 | } |
| 213 | |
| 214 | for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { |
| 215 | if (point[i].coord_x > 0 || point[i].coord_y > 0) { |
| 216 | input_report_abs(ts->input, ABS_MT_POSITION_X, |
| 217 | point[i].coord_x); |
| 218 | input_report_abs(ts->input, ABS_MT_POSITION_Y, |
| 219 | point[i].coord_y); |
| 220 | input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, |
| 221 | point[i].area_major); |
| 222 | input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, |
| 223 | point[i].area_minor); |
| 224 | input_report_abs(ts->input, ABS_MT_ORIENTATION, |
| 225 | point[i].orientation); |
| 226 | input_mt_sync(ts->input); |
| 227 | |
| 228 | /* use first finger as source for singletouch */ |
| 229 | if (fingers == 0) |
| 230 | abs = i; |
| 231 | |
| 232 | /* number of touch points could also be queried |
| 233 | * via i2c but would require an additional call |
| 234 | */ |
| 235 | fingers++; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | input_report_key(ts->input, BTN_TOUCH, fingers > 0); |
| 240 | |
| 241 | if (abs > -1) { |
| 242 | input_report_abs(ts->input, ABS_X, point[abs].coord_x); |
| 243 | input_report_abs(ts->input, ABS_Y, point[abs].coord_y); |
| 244 | } |
| 245 | |
| 246 | input_sync(ts->input); |
| 247 | |
| 248 | /* we want to loop only in touch_ind_mode */ |
| 249 | if (!ts->touch_ind_mode) |
| 250 | break; |
| 251 | |
| 252 | wait_event_timeout(ts->wait, ts->stopped, |
| 253 | msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); |
| 254 | } |
| 255 | |
| 256 | return IRQ_HANDLED; |
| 257 | } |
| 258 | |
| 259 | /* |
| 260 | * Set the power mode of the device. |
| 261 | * Valid modes are |
| 262 | * - AUO_PIXCIR_POWER_ACTIVE |
| 263 | * - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch |
| 264 | * - AUO_PIXCIR_POWER_DEEP_SLEEP |
| 265 | */ |
| 266 | static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode) |
| 267 | { |
| 268 | struct i2c_client *client = ts->client; |
| 269 | int ret; |
| 270 | |
| 271 | ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE); |
| 272 | if (ret < 0) { |
| 273 | dev_err(&client->dev, "unable to read reg %Xh, %d\n", |
| 274 | AUO_PIXCIR_REG_POWER_MODE, ret); |
| 275 | return ret; |
| 276 | } |
| 277 | |
| 278 | ret &= ~AUO_PIXCIR_POWER_MASK; |
| 279 | ret |= mode; |
| 280 | |
| 281 | ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret); |
| 282 | if (ret) { |
| 283 | dev_err(&client->dev, "unable to write reg %Xh, %d\n", |
| 284 | AUO_PIXCIR_REG_POWER_MODE, ret); |
| 285 | return ret; |
| 286 | } |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 291 | static int auo_pixcir_int_config(struct auo_pixcir_ts *ts, |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 292 | int int_setting) |
| 293 | { |
| 294 | struct i2c_client *client = ts->client; |
Heiko Stübner | 38e83f7 | 2013-02-23 12:06:48 -0800 | [diff] [blame] | 295 | const struct auo_pixcir_ts_platdata *pdata = ts->pdata; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 296 | int ret; |
| 297 | |
| 298 | ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); |
| 299 | if (ret < 0) { |
| 300 | dev_err(&client->dev, "unable to read reg %Xh, %d\n", |
| 301 | AUO_PIXCIR_REG_INT_SETTING, ret); |
| 302 | return ret; |
| 303 | } |
| 304 | |
| 305 | ret &= ~AUO_PIXCIR_INT_MODE_MASK; |
| 306 | ret |= int_setting; |
| 307 | ret |= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */ |
| 308 | |
| 309 | ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, |
| 310 | ret); |
| 311 | if (ret < 0) { |
| 312 | dev_err(&client->dev, "unable to write reg %Xh, %d\n", |
| 313 | AUO_PIXCIR_REG_INT_SETTING, ret); |
| 314 | return ret; |
| 315 | } |
| 316 | |
| 317 | ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND; |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | /* control the generation of interrupts on the device side */ |
| 323 | static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable) |
| 324 | { |
| 325 | struct i2c_client *client = ts->client; |
| 326 | int ret; |
| 327 | |
| 328 | ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); |
| 329 | if (ret < 0) { |
| 330 | dev_err(&client->dev, "unable to read reg %Xh, %d\n", |
| 331 | AUO_PIXCIR_REG_INT_SETTING, ret); |
| 332 | return ret; |
| 333 | } |
| 334 | |
| 335 | if (enable) |
| 336 | ret |= AUO_PIXCIR_INT_ENABLE; |
| 337 | else |
| 338 | ret &= ~AUO_PIXCIR_INT_ENABLE; |
| 339 | |
| 340 | ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, |
| 341 | ret); |
| 342 | if (ret < 0) { |
| 343 | dev_err(&client->dev, "unable to write reg %Xh, %d\n", |
| 344 | AUO_PIXCIR_REG_INT_SETTING, ret); |
| 345 | return ret; |
| 346 | } |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | static int auo_pixcir_start(struct auo_pixcir_ts *ts) |
| 352 | { |
| 353 | struct i2c_client *client = ts->client; |
| 354 | int ret; |
| 355 | |
| 356 | ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE); |
| 357 | if (ret < 0) { |
| 358 | dev_err(&client->dev, "could not set power mode, %d\n", |
| 359 | ret); |
| 360 | return ret; |
| 361 | } |
| 362 | |
| 363 | ts->stopped = false; |
| 364 | mb(); |
| 365 | enable_irq(client->irq); |
| 366 | |
| 367 | ret = auo_pixcir_int_toggle(ts, 1); |
| 368 | if (ret < 0) { |
| 369 | dev_err(&client->dev, "could not enable interrupt, %d\n", |
| 370 | ret); |
| 371 | disable_irq(client->irq); |
| 372 | return ret; |
| 373 | } |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static int auo_pixcir_stop(struct auo_pixcir_ts *ts) |
| 379 | { |
| 380 | struct i2c_client *client = ts->client; |
| 381 | int ret; |
| 382 | |
| 383 | ret = auo_pixcir_int_toggle(ts, 0); |
| 384 | if (ret < 0) { |
| 385 | dev_err(&client->dev, "could not disable interrupt, %d\n", |
| 386 | ret); |
| 387 | return ret; |
| 388 | } |
| 389 | |
| 390 | /* disable receiving of interrupts */ |
| 391 | disable_irq(client->irq); |
| 392 | ts->stopped = true; |
| 393 | mb(); |
| 394 | wake_up(&ts->wait); |
| 395 | |
| 396 | return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP); |
| 397 | } |
| 398 | |
| 399 | static int auo_pixcir_input_open(struct input_dev *dev) |
| 400 | { |
| 401 | struct auo_pixcir_ts *ts = input_get_drvdata(dev); |
| 402 | int ret; |
| 403 | |
| 404 | ret = auo_pixcir_start(ts); |
| 405 | if (ret) |
| 406 | return ret; |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | static void auo_pixcir_input_close(struct input_dev *dev) |
| 412 | { |
| 413 | struct auo_pixcir_ts *ts = input_get_drvdata(dev); |
| 414 | |
| 415 | auo_pixcir_stop(ts); |
| 416 | |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | #ifdef CONFIG_PM_SLEEP |
| 421 | static int auo_pixcir_suspend(struct device *dev) |
| 422 | { |
| 423 | struct i2c_client *client = to_i2c_client(dev); |
| 424 | struct auo_pixcir_ts *ts = i2c_get_clientdata(client); |
| 425 | struct input_dev *input = ts->input; |
| 426 | int ret = 0; |
| 427 | |
| 428 | mutex_lock(&input->mutex); |
| 429 | |
| 430 | /* when configured as wakeup source, device should always wake system |
| 431 | * therefore start device if necessary |
| 432 | */ |
| 433 | if (device_may_wakeup(&client->dev)) { |
| 434 | /* need to start device if not open, to be wakeup source */ |
| 435 | if (!input->users) { |
| 436 | ret = auo_pixcir_start(ts); |
| 437 | if (ret) |
| 438 | goto unlock; |
| 439 | } |
| 440 | |
| 441 | enable_irq_wake(client->irq); |
| 442 | ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP); |
| 443 | } else if (input->users) { |
| 444 | ret = auo_pixcir_stop(ts); |
| 445 | } |
| 446 | |
| 447 | unlock: |
| 448 | mutex_unlock(&input->mutex); |
| 449 | |
| 450 | return ret; |
| 451 | } |
| 452 | |
| 453 | static int auo_pixcir_resume(struct device *dev) |
| 454 | { |
| 455 | struct i2c_client *client = to_i2c_client(dev); |
| 456 | struct auo_pixcir_ts *ts = i2c_get_clientdata(client); |
| 457 | struct input_dev *input = ts->input; |
| 458 | int ret = 0; |
| 459 | |
| 460 | mutex_lock(&input->mutex); |
| 461 | |
| 462 | if (device_may_wakeup(&client->dev)) { |
| 463 | disable_irq_wake(client->irq); |
| 464 | |
| 465 | /* need to stop device if it was not open on suspend */ |
| 466 | if (!input->users) { |
| 467 | ret = auo_pixcir_stop(ts); |
| 468 | if (ret) |
| 469 | goto unlock; |
| 470 | } |
| 471 | |
| 472 | /* device wakes automatically from SLEEP */ |
| 473 | } else if (input->users) { |
| 474 | ret = auo_pixcir_start(ts); |
| 475 | } |
| 476 | |
| 477 | unlock: |
| 478 | mutex_unlock(&input->mutex); |
| 479 | |
| 480 | return ret; |
| 481 | } |
| 482 | #endif |
| 483 | |
Heiko Stübner | 7241443f | 2013-02-23 12:08:55 -0800 | [diff] [blame] | 484 | static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops, |
| 485 | auo_pixcir_suspend, auo_pixcir_resume); |
| 486 | |
| 487 | #ifdef CONFIG_OF |
| 488 | static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) |
| 489 | { |
| 490 | struct auo_pixcir_ts_platdata *pdata; |
| 491 | struct device_node *np = dev->of_node; |
| 492 | |
| 493 | if (!np) |
| 494 | return ERR_PTR(-ENOENT); |
| 495 | |
| 496 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| 497 | if (!pdata) { |
| 498 | dev_err(dev, "failed to allocate platform data\n"); |
| 499 | return ERR_PTR(-ENOMEM); |
| 500 | } |
| 501 | |
| 502 | pdata->gpio_int = of_get_gpio(np, 0); |
| 503 | if (!gpio_is_valid(pdata->gpio_int)) { |
| 504 | dev_err(dev, "failed to get interrupt gpio\n"); |
| 505 | return ERR_PTR(-EINVAL); |
| 506 | } |
| 507 | |
| 508 | pdata->gpio_rst = of_get_gpio(np, 1); |
| 509 | if (!gpio_is_valid(pdata->gpio_rst)) { |
| 510 | dev_err(dev, "failed to get reset gpio\n"); |
| 511 | return ERR_PTR(-EINVAL); |
| 512 | } |
| 513 | |
| 514 | if (of_property_read_u32(np, "x-size", &pdata->x_max)) { |
| 515 | dev_err(dev, "failed to get x-size property\n"); |
| 516 | return ERR_PTR(-EINVAL); |
| 517 | } |
| 518 | |
| 519 | if (of_property_read_u32(np, "y-size", &pdata->y_max)) { |
| 520 | dev_err(dev, "failed to get y-size property\n"); |
| 521 | return ERR_PTR(-EINVAL); |
| 522 | } |
| 523 | |
| 524 | /* default to asserting the interrupt when the screen is touched */ |
| 525 | pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND; |
| 526 | |
| 527 | return pdata; |
| 528 | } |
| 529 | #else |
| 530 | static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) |
| 531 | { |
| 532 | return ERR_PTR(-EINVAL); |
| 533 | } |
| 534 | #endif |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 535 | |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 536 | static void auo_pixcir_reset(void *data) |
| 537 | { |
| 538 | struct auo_pixcir_ts *ts = data; |
| 539 | |
| 540 | gpio_set_value(ts->pdata->gpio_rst, 0); |
| 541 | } |
| 542 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 543 | static int auo_pixcir_probe(struct i2c_client *client, |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 544 | const struct i2c_device_id *id) |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 545 | { |
Heiko Stübner | 7241443f | 2013-02-23 12:08:55 -0800 | [diff] [blame] | 546 | const struct auo_pixcir_ts_platdata *pdata; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 547 | struct auo_pixcir_ts *ts; |
| 548 | struct input_dev *input_dev; |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 549 | int version; |
| 550 | int error; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 551 | |
Heiko Stübner | 7241443f | 2013-02-23 12:08:55 -0800 | [diff] [blame] | 552 | pdata = dev_get_platdata(&client->dev); |
| 553 | if (!pdata) { |
| 554 | pdata = auo_pixcir_parse_dt(&client->dev); |
| 555 | if (IS_ERR(pdata)) |
| 556 | return PTR_ERR(pdata); |
| 557 | } |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 558 | |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 559 | ts = devm_kzalloc(&client->dev, |
| 560 | sizeof(struct auo_pixcir_ts), GFP_KERNEL); |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 561 | if (!ts) |
| 562 | return -ENOMEM; |
| 563 | |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 564 | input_dev = devm_input_allocate_device(&client->dev); |
| 565 | if (!input_dev) { |
| 566 | dev_err(&client->dev, "could not allocate input device\n"); |
| 567 | return -ENOMEM; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 568 | } |
| 569 | |
Heiko Stübner | 38e83f7 | 2013-02-23 12:06:48 -0800 | [diff] [blame] | 570 | ts->pdata = pdata; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 571 | ts->client = client; |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 572 | ts->input = input_dev; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 573 | ts->touch_ind_mode = 0; |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 574 | ts->stopped = true; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 575 | init_waitqueue_head(&ts->wait); |
| 576 | |
| 577 | snprintf(ts->phys, sizeof(ts->phys), |
| 578 | "%s/input0", dev_name(&client->dev)); |
| 579 | |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 580 | input_dev->name = "AUO-Pixcir touchscreen"; |
| 581 | input_dev->phys = ts->phys; |
| 582 | input_dev->id.bustype = BUS_I2C; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 583 | |
| 584 | input_dev->open = auo_pixcir_input_open; |
| 585 | input_dev->close = auo_pixcir_input_close; |
| 586 | |
| 587 | __set_bit(EV_ABS, input_dev->evbit); |
| 588 | __set_bit(EV_KEY, input_dev->evbit); |
| 589 | |
| 590 | __set_bit(BTN_TOUCH, input_dev->keybit); |
| 591 | |
| 592 | /* For single touch */ |
| 593 | input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0); |
| 594 | input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0); |
| 595 | |
| 596 | /* For multi touch */ |
| 597 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, |
| 598 | pdata->x_max, 0, 0); |
| 599 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, |
| 600 | pdata->y_max, 0, 0); |
| 601 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, |
| 602 | AUO_PIXCIR_MAX_AREA, 0, 0); |
| 603 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, |
| 604 | AUO_PIXCIR_MAX_AREA, 0, 0); |
| 605 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); |
| 606 | |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 607 | input_set_drvdata(ts->input, ts); |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 608 | |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 609 | error = devm_gpio_request_one(&client->dev, pdata->gpio_int, |
| 610 | GPIOF_DIR_IN, "auo_pixcir_ts_int"); |
| 611 | if (error) { |
| 612 | dev_err(&client->dev, "request of gpio %d failed, %d\n", |
| 613 | pdata->gpio_int, error); |
| 614 | return error; |
| 615 | } |
| 616 | |
| 617 | error = devm_gpio_request_one(&client->dev, pdata->gpio_rst, |
| 618 | GPIOF_DIR_OUT | GPIOF_INIT_HIGH, |
| 619 | "auo_pixcir_ts_rst"); |
| 620 | if (error) { |
| 621 | dev_err(&client->dev, "request of gpio %d failed, %d\n", |
| 622 | pdata->gpio_rst, error); |
| 623 | return error; |
| 624 | } |
| 625 | |
| 626 | error = devm_add_action(&client->dev, auo_pixcir_reset, ts); |
| 627 | if (error) { |
| 628 | auo_pixcir_reset(ts); |
| 629 | dev_err(&client->dev, "failed to register reset action, %d\n", |
| 630 | error); |
| 631 | return error; |
| 632 | } |
| 633 | |
| 634 | msleep(200); |
| 635 | |
| 636 | version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION); |
| 637 | if (version < 0) { |
| 638 | error = version; |
| 639 | return error; |
| 640 | } |
| 641 | |
| 642 | dev_info(&client->dev, "firmware version 0x%X\n", version); |
| 643 | |
| 644 | error = auo_pixcir_int_config(ts, pdata->int_setting); |
| 645 | if (error) |
| 646 | return error; |
| 647 | |
| 648 | error = devm_request_threaded_irq(&client->dev, client->irq, |
| 649 | NULL, auo_pixcir_interrupt, |
| 650 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
| 651 | input_dev->name, ts); |
| 652 | if (error) { |
| 653 | dev_err(&client->dev, "irq %d requested failed, %d\n", |
| 654 | client->irq, error); |
| 655 | return error; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | /* stop device and put it into deep sleep until it is opened */ |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 659 | error = auo_pixcir_stop(ts); |
| 660 | if (error) |
| 661 | return error; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 662 | |
Dmitry Torokhov | bfc29e9 | 2013-02-23 12:18:14 -0800 | [diff] [blame] | 663 | error = input_register_device(input_dev); |
| 664 | if (error) { |
| 665 | dev_err(&client->dev, "could not register input device, %d\n", |
| 666 | error); |
| 667 | return error; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | i2c_set_clientdata(client, ts); |
| 671 | |
| 672 | return 0; |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | static const struct i2c_device_id auo_pixcir_idtable[] = { |
| 676 | { "auo_pixcir_ts", 0 }, |
| 677 | { } |
| 678 | }; |
| 679 | MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable); |
| 680 | |
Heiko Stübner | 7241443f | 2013-02-23 12:08:55 -0800 | [diff] [blame] | 681 | #ifdef CONFIG_OF |
| 682 | static struct of_device_id auo_pixcir_ts_dt_idtable[] = { |
| 683 | { .compatible = "auo,auo_pixcir_ts" }, |
| 684 | {}, |
| 685 | }; |
| 686 | MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable); |
| 687 | #endif |
| 688 | |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 689 | static struct i2c_driver auo_pixcir_driver = { |
| 690 | .driver = { |
| 691 | .owner = THIS_MODULE, |
| 692 | .name = "auo_pixcir_ts", |
| 693 | .pm = &auo_pixcir_pm_ops, |
Heiko Stübner | 7241443f | 2013-02-23 12:08:55 -0800 | [diff] [blame] | 694 | .of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable), |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 695 | }, |
| 696 | .probe = auo_pixcir_probe, |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 697 | .id_table = auo_pixcir_idtable, |
| 698 | }; |
| 699 | |
Dmitry Torokhov | 4a53383 | 2012-03-16 23:05:44 -0700 | [diff] [blame] | 700 | module_i2c_driver(auo_pixcir_driver); |
Heiko Stübner | 5245db4 | 2011-12-27 21:21:17 -0800 | [diff] [blame] | 701 | |
| 702 | MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver"); |
| 703 | MODULE_LICENSE("GPL v2"); |
| 704 | MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); |