Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Kionix, Inc. |
| 3 | * Written by Chris Hudson <chudson@kionix.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 17 | * 02111-1307, USA |
| 18 | */ |
| 19 | |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/i2c.h> |
| 22 | #include <linux/input.h> |
| 23 | #include <linux/interrupt.h> |
Stephen Rothwell | 2501ec9 | 2011-07-30 11:55:38 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 25 | #include <linux/slab.h> |
| 26 | #include <linux/input/kxtj9.h> |
| 27 | #include <linux/input-polldev.h> |
| 28 | |
| 29 | #define NAME "kxtj9" |
| 30 | #define G_MAX 8000 |
| 31 | /* OUTPUT REGISTERS */ |
| 32 | #define XOUT_L 0x06 |
| 33 | #define WHO_AM_I 0x0F |
| 34 | /* CONTROL REGISTERS */ |
| 35 | #define INT_REL 0x1A |
| 36 | #define CTRL_REG1 0x1B |
| 37 | #define INT_CTRL1 0x1E |
| 38 | #define DATA_CTRL 0x21 |
| 39 | /* CONTROL REGISTER 1 BITS */ |
| 40 | #define PC1_OFF 0x7F |
| 41 | #define PC1_ON (1 << 7) |
| 42 | /* Data ready funtion enable bit: set during probe if using irq mode */ |
| 43 | #define DRDYE (1 << 5) |
Christopher Hudson | 0439166 | 2012-03-16 22:47:47 -0700 | [diff] [blame] | 44 | /* DATA CONTROL REGISTER BITS */ |
| 45 | #define ODR12_5F 0 |
| 46 | #define ODR25F 1 |
| 47 | #define ODR50F 2 |
| 48 | #define ODR100F 3 |
| 49 | #define ODR200F 4 |
| 50 | #define ODR400F 5 |
| 51 | #define ODR800F 6 |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 52 | /* INTERRUPT CONTROL REGISTER 1 BITS */ |
| 53 | /* Set these during probe if using irq mode */ |
| 54 | #define KXTJ9_IEL (1 << 3) |
| 55 | #define KXTJ9_IEA (1 << 4) |
| 56 | #define KXTJ9_IEN (1 << 5) |
| 57 | /* INPUT_ABS CONSTANTS */ |
| 58 | #define FUZZ 3 |
| 59 | #define FLAT 3 |
| 60 | /* RESUME STATE INDICES */ |
| 61 | #define RES_DATA_CTRL 0 |
| 62 | #define RES_CTRL_REG1 1 |
| 63 | #define RES_INT_CTRL1 2 |
| 64 | #define RESUME_ENTRIES 3 |
| 65 | |
| 66 | /* |
| 67 | * The following table lists the maximum appropriate poll interval for each |
| 68 | * available output data rate. |
| 69 | */ |
| 70 | static const struct { |
| 71 | unsigned int cutoff; |
| 72 | u8 mask; |
| 73 | } kxtj9_odr_table[] = { |
| 74 | { 3, ODR800F }, |
| 75 | { 5, ODR400F }, |
| 76 | { 10, ODR200F }, |
| 77 | { 20, ODR100F }, |
| 78 | { 40, ODR50F }, |
| 79 | { 80, ODR25F }, |
| 80 | { 0, ODR12_5F}, |
| 81 | }; |
| 82 | |
| 83 | struct kxtj9_data { |
| 84 | struct i2c_client *client; |
| 85 | struct kxtj9_platform_data pdata; |
| 86 | struct input_dev *input_dev; |
| 87 | #ifdef CONFIG_INPUT_KXTJ9_POLLED_MODE |
| 88 | struct input_polled_dev *poll_dev; |
| 89 | #endif |
| 90 | unsigned int last_poll_interval; |
| 91 | u8 shift; |
| 92 | u8 ctrl_reg1; |
| 93 | u8 data_ctrl; |
| 94 | u8 int_ctrl; |
| 95 | }; |
| 96 | |
| 97 | static int kxtj9_i2c_read(struct kxtj9_data *tj9, u8 addr, u8 *data, int len) |
| 98 | { |
| 99 | struct i2c_msg msgs[] = { |
| 100 | { |
| 101 | .addr = tj9->client->addr, |
| 102 | .flags = tj9->client->flags, |
| 103 | .len = 1, |
| 104 | .buf = &addr, |
| 105 | }, |
| 106 | { |
| 107 | .addr = tj9->client->addr, |
| 108 | .flags = tj9->client->flags | I2C_M_RD, |
| 109 | .len = len, |
| 110 | .buf = data, |
| 111 | }, |
| 112 | }; |
| 113 | |
| 114 | return i2c_transfer(tj9->client->adapter, msgs, 2); |
| 115 | } |
| 116 | |
| 117 | static void kxtj9_report_acceleration_data(struct kxtj9_data *tj9) |
| 118 | { |
| 119 | s16 acc_data[3]; /* Data bytes from hardware xL, xH, yL, yH, zL, zH */ |
| 120 | s16 x, y, z; |
| 121 | int err; |
| 122 | |
| 123 | err = kxtj9_i2c_read(tj9, XOUT_L, (u8 *)acc_data, 6); |
| 124 | if (err < 0) |
| 125 | dev_err(&tj9->client->dev, "accelerometer data read failed\n"); |
| 126 | |
Christopher Hudson | 0439166 | 2012-03-16 22:47:47 -0700 | [diff] [blame] | 127 | x = le16_to_cpu(acc_data[tj9->pdata.axis_map_x]); |
| 128 | y = le16_to_cpu(acc_data[tj9->pdata.axis_map_y]); |
| 129 | z = le16_to_cpu(acc_data[tj9->pdata.axis_map_z]); |
| 130 | |
| 131 | x >>= tj9->shift; |
| 132 | y >>= tj9->shift; |
| 133 | z >>= tj9->shift; |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 134 | |
| 135 | input_report_abs(tj9->input_dev, ABS_X, tj9->pdata.negate_x ? -x : x); |
| 136 | input_report_abs(tj9->input_dev, ABS_Y, tj9->pdata.negate_y ? -y : y); |
| 137 | input_report_abs(tj9->input_dev, ABS_Z, tj9->pdata.negate_z ? -z : z); |
| 138 | input_sync(tj9->input_dev); |
| 139 | } |
| 140 | |
| 141 | static irqreturn_t kxtj9_isr(int irq, void *dev) |
| 142 | { |
| 143 | struct kxtj9_data *tj9 = dev; |
| 144 | int err; |
| 145 | |
| 146 | /* data ready is the only possible interrupt type */ |
| 147 | kxtj9_report_acceleration_data(tj9); |
| 148 | |
| 149 | err = i2c_smbus_read_byte_data(tj9->client, INT_REL); |
| 150 | if (err < 0) |
| 151 | dev_err(&tj9->client->dev, |
| 152 | "error clearing interrupt status: %d\n", err); |
| 153 | |
| 154 | return IRQ_HANDLED; |
| 155 | } |
| 156 | |
| 157 | static int kxtj9_update_g_range(struct kxtj9_data *tj9, u8 new_g_range) |
| 158 | { |
| 159 | switch (new_g_range) { |
| 160 | case KXTJ9_G_2G: |
| 161 | tj9->shift = 4; |
| 162 | break; |
| 163 | case KXTJ9_G_4G: |
| 164 | tj9->shift = 3; |
| 165 | break; |
| 166 | case KXTJ9_G_8G: |
| 167 | tj9->shift = 2; |
| 168 | break; |
| 169 | default: |
| 170 | return -EINVAL; |
| 171 | } |
| 172 | |
| 173 | tj9->ctrl_reg1 &= 0xe7; |
| 174 | tj9->ctrl_reg1 |= new_g_range; |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int kxtj9_update_odr(struct kxtj9_data *tj9, unsigned int poll_interval) |
| 180 | { |
| 181 | int err; |
| 182 | int i; |
| 183 | |
| 184 | /* Use the lowest ODR that can support the requested poll interval */ |
| 185 | for (i = 0; i < ARRAY_SIZE(kxtj9_odr_table); i++) { |
| 186 | tj9->data_ctrl = kxtj9_odr_table[i].mask; |
| 187 | if (poll_interval < kxtj9_odr_table[i].cutoff) |
| 188 | break; |
| 189 | } |
| 190 | |
| 191 | err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0); |
| 192 | if (err < 0) |
| 193 | return err; |
| 194 | |
| 195 | err = i2c_smbus_write_byte_data(tj9->client, DATA_CTRL, tj9->data_ctrl); |
| 196 | if (err < 0) |
| 197 | return err; |
| 198 | |
| 199 | err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1); |
| 200 | if (err < 0) |
| 201 | return err; |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int kxtj9_device_power_on(struct kxtj9_data *tj9) |
| 207 | { |
| 208 | if (tj9->pdata.power_on) |
| 209 | return tj9->pdata.power_on(); |
| 210 | |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static void kxtj9_device_power_off(struct kxtj9_data *tj9) |
| 215 | { |
| 216 | int err; |
| 217 | |
| 218 | tj9->ctrl_reg1 &= PC1_OFF; |
| 219 | err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1); |
| 220 | if (err < 0) |
| 221 | dev_err(&tj9->client->dev, "soft power off failed\n"); |
| 222 | |
| 223 | if (tj9->pdata.power_off) |
| 224 | tj9->pdata.power_off(); |
| 225 | } |
| 226 | |
| 227 | static int kxtj9_enable(struct kxtj9_data *tj9) |
| 228 | { |
| 229 | int err; |
| 230 | |
| 231 | err = kxtj9_device_power_on(tj9); |
| 232 | if (err < 0) |
| 233 | return err; |
| 234 | |
| 235 | /* ensure that PC1 is cleared before updating control registers */ |
| 236 | err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, 0); |
| 237 | if (err < 0) |
| 238 | return err; |
| 239 | |
| 240 | /* only write INT_CTRL_REG1 if in irq mode */ |
| 241 | if (tj9->client->irq) { |
| 242 | err = i2c_smbus_write_byte_data(tj9->client, |
| 243 | INT_CTRL1, tj9->int_ctrl); |
| 244 | if (err < 0) |
| 245 | return err; |
| 246 | } |
| 247 | |
| 248 | err = kxtj9_update_g_range(tj9, tj9->pdata.g_range); |
| 249 | if (err < 0) |
| 250 | return err; |
| 251 | |
| 252 | /* turn on outputs */ |
| 253 | tj9->ctrl_reg1 |= PC1_ON; |
| 254 | err = i2c_smbus_write_byte_data(tj9->client, CTRL_REG1, tj9->ctrl_reg1); |
| 255 | if (err < 0) |
| 256 | return err; |
| 257 | |
| 258 | err = kxtj9_update_odr(tj9, tj9->last_poll_interval); |
| 259 | if (err < 0) |
| 260 | return err; |
| 261 | |
| 262 | /* clear initial interrupt if in irq mode */ |
| 263 | if (tj9->client->irq) { |
| 264 | err = i2c_smbus_read_byte_data(tj9->client, INT_REL); |
| 265 | if (err < 0) { |
| 266 | dev_err(&tj9->client->dev, |
| 267 | "error clearing interrupt: %d\n", err); |
| 268 | goto fail; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | return 0; |
| 273 | |
| 274 | fail: |
| 275 | kxtj9_device_power_off(tj9); |
| 276 | return err; |
| 277 | } |
| 278 | |
| 279 | static void kxtj9_disable(struct kxtj9_data *tj9) |
| 280 | { |
| 281 | kxtj9_device_power_off(tj9); |
| 282 | } |
| 283 | |
| 284 | static int kxtj9_input_open(struct input_dev *input) |
| 285 | { |
| 286 | struct kxtj9_data *tj9 = input_get_drvdata(input); |
| 287 | |
| 288 | return kxtj9_enable(tj9); |
| 289 | } |
| 290 | |
| 291 | static void kxtj9_input_close(struct input_dev *dev) |
| 292 | { |
| 293 | struct kxtj9_data *tj9 = input_get_drvdata(dev); |
| 294 | |
| 295 | kxtj9_disable(tj9); |
| 296 | } |
| 297 | |
| 298 | static void __devinit kxtj9_init_input_device(struct kxtj9_data *tj9, |
| 299 | struct input_dev *input_dev) |
| 300 | { |
| 301 | __set_bit(EV_ABS, input_dev->evbit); |
| 302 | input_set_abs_params(input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT); |
| 303 | input_set_abs_params(input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT); |
| 304 | input_set_abs_params(input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT); |
| 305 | |
| 306 | input_dev->name = "kxtj9_accel"; |
| 307 | input_dev->id.bustype = BUS_I2C; |
| 308 | input_dev->dev.parent = &tj9->client->dev; |
| 309 | } |
| 310 | |
| 311 | static int __devinit kxtj9_setup_input_device(struct kxtj9_data *tj9) |
| 312 | { |
| 313 | struct input_dev *input_dev; |
| 314 | int err; |
| 315 | |
| 316 | input_dev = input_allocate_device(); |
Dan Carpenter | 4fd9fcf | 2011-07-19 23:12:21 -0700 | [diff] [blame] | 317 | if (!input_dev) { |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 318 | dev_err(&tj9->client->dev, "input device allocate failed\n"); |
| 319 | return -ENOMEM; |
| 320 | } |
| 321 | |
| 322 | tj9->input_dev = input_dev; |
| 323 | |
| 324 | input_dev->open = kxtj9_input_open; |
| 325 | input_dev->close = kxtj9_input_close; |
| 326 | input_set_drvdata(input_dev, tj9); |
| 327 | |
| 328 | kxtj9_init_input_device(tj9, input_dev); |
| 329 | |
| 330 | err = input_register_device(tj9->input_dev); |
| 331 | if (err) { |
| 332 | dev_err(&tj9->client->dev, |
| 333 | "unable to register input polled device %s: %d\n", |
| 334 | tj9->input_dev->name, err); |
| 335 | input_free_device(tj9->input_dev); |
| 336 | return err; |
| 337 | } |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * When IRQ mode is selected, we need to provide an interface to allow the user |
| 344 | * to change the output data rate of the part. For consistency, we are using |
| 345 | * the set_poll method, which accepts a poll interval in milliseconds, and then |
| 346 | * calls update_odr() while passing this value as an argument. In IRQ mode, the |
| 347 | * data outputs will not be read AT the requested poll interval, rather, the |
| 348 | * lowest ODR that can support the requested interval. The client application |
| 349 | * will be responsible for retrieving data from the input node at the desired |
| 350 | * interval. |
| 351 | */ |
| 352 | |
| 353 | /* Returns currently selected poll interval (in ms) */ |
| 354 | static ssize_t kxtj9_get_poll(struct device *dev, |
| 355 | struct device_attribute *attr, char *buf) |
| 356 | { |
| 357 | struct i2c_client *client = to_i2c_client(dev); |
| 358 | struct kxtj9_data *tj9 = i2c_get_clientdata(client); |
| 359 | |
| 360 | return sprintf(buf, "%d\n", tj9->last_poll_interval); |
| 361 | } |
| 362 | |
| 363 | /* Allow users to select a new poll interval (in ms) */ |
| 364 | static ssize_t kxtj9_set_poll(struct device *dev, struct device_attribute *attr, |
| 365 | const char *buf, size_t count) |
| 366 | { |
| 367 | struct i2c_client *client = to_i2c_client(dev); |
| 368 | struct kxtj9_data *tj9 = i2c_get_clientdata(client); |
| 369 | struct input_dev *input_dev = tj9->input_dev; |
| 370 | unsigned int interval; |
| 371 | int error; |
| 372 | |
| 373 | error = kstrtouint(buf, 10, &interval); |
| 374 | if (error < 0) |
| 375 | return error; |
| 376 | |
| 377 | /* Lock the device to prevent races with open/close (and itself) */ |
Dan Carpenter | 6eab7ce | 2011-07-19 23:16:29 -0700 | [diff] [blame] | 378 | mutex_lock(&input_dev->mutex); |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 379 | |
| 380 | disable_irq(client->irq); |
| 381 | |
| 382 | /* |
| 383 | * Set current interval to the greater of the minimum interval or |
| 384 | * the requested interval |
| 385 | */ |
| 386 | tj9->last_poll_interval = max(interval, tj9->pdata.min_interval); |
| 387 | |
| 388 | kxtj9_update_odr(tj9, tj9->last_poll_interval); |
| 389 | |
| 390 | enable_irq(client->irq); |
| 391 | mutex_unlock(&input_dev->mutex); |
| 392 | |
| 393 | return count; |
| 394 | } |
| 395 | |
| 396 | static DEVICE_ATTR(poll, S_IRUGO|S_IWUSR, kxtj9_get_poll, kxtj9_set_poll); |
| 397 | |
| 398 | static struct attribute *kxtj9_attributes[] = { |
| 399 | &dev_attr_poll.attr, |
| 400 | NULL |
| 401 | }; |
| 402 | |
| 403 | static struct attribute_group kxtj9_attribute_group = { |
| 404 | .attrs = kxtj9_attributes |
| 405 | }; |
| 406 | |
| 407 | |
| 408 | #ifdef CONFIG_INPUT_KXTJ9_POLLED_MODE |
| 409 | static void kxtj9_poll(struct input_polled_dev *dev) |
| 410 | { |
| 411 | struct kxtj9_data *tj9 = dev->private; |
| 412 | unsigned int poll_interval = dev->poll_interval; |
| 413 | |
| 414 | kxtj9_report_acceleration_data(tj9); |
| 415 | |
| 416 | if (poll_interval != tj9->last_poll_interval) { |
| 417 | kxtj9_update_odr(tj9, poll_interval); |
| 418 | tj9->last_poll_interval = poll_interval; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | static void kxtj9_polled_input_open(struct input_polled_dev *dev) |
| 423 | { |
| 424 | struct kxtj9_data *tj9 = dev->private; |
| 425 | |
| 426 | kxtj9_enable(tj9); |
| 427 | } |
| 428 | |
| 429 | static void kxtj9_polled_input_close(struct input_polled_dev *dev) |
| 430 | { |
| 431 | struct kxtj9_data *tj9 = dev->private; |
| 432 | |
| 433 | kxtj9_disable(tj9); |
| 434 | } |
| 435 | |
| 436 | static int __devinit kxtj9_setup_polled_device(struct kxtj9_data *tj9) |
| 437 | { |
| 438 | int err; |
| 439 | struct input_polled_dev *poll_dev; |
| 440 | poll_dev = input_allocate_polled_device(); |
| 441 | |
| 442 | if (!poll_dev) { |
| 443 | dev_err(&tj9->client->dev, |
| 444 | "Failed to allocate polled device\n"); |
| 445 | return -ENOMEM; |
| 446 | } |
| 447 | |
| 448 | tj9->poll_dev = poll_dev; |
| 449 | tj9->input_dev = poll_dev->input; |
| 450 | |
| 451 | poll_dev->private = tj9; |
| 452 | poll_dev->poll = kxtj9_poll; |
| 453 | poll_dev->open = kxtj9_polled_input_open; |
| 454 | poll_dev->close = kxtj9_polled_input_close; |
| 455 | |
| 456 | kxtj9_init_input_device(tj9, poll_dev->input); |
| 457 | |
| 458 | err = input_register_polled_device(poll_dev); |
| 459 | if (err) { |
| 460 | dev_err(&tj9->client->dev, |
| 461 | "Unable to register polled device, err=%d\n", err); |
| 462 | input_free_polled_device(poll_dev); |
| 463 | return err; |
| 464 | } |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static void __devexit kxtj9_teardown_polled_device(struct kxtj9_data *tj9) |
| 470 | { |
| 471 | input_unregister_polled_device(tj9->poll_dev); |
| 472 | input_free_polled_device(tj9->poll_dev); |
| 473 | } |
| 474 | |
| 475 | #else |
| 476 | |
| 477 | static inline int kxtj9_setup_polled_device(struct kxtj9_data *tj9) |
| 478 | { |
| 479 | return -ENOSYS; |
| 480 | } |
| 481 | |
| 482 | static inline void kxtj9_teardown_polled_device(struct kxtj9_data *tj9) |
| 483 | { |
| 484 | } |
| 485 | |
| 486 | #endif |
| 487 | |
| 488 | static int __devinit kxtj9_verify(struct kxtj9_data *tj9) |
| 489 | { |
| 490 | int retval; |
| 491 | |
| 492 | retval = kxtj9_device_power_on(tj9); |
| 493 | if (retval < 0) |
| 494 | return retval; |
| 495 | |
| 496 | retval = i2c_smbus_read_byte_data(tj9->client, WHO_AM_I); |
| 497 | if (retval < 0) { |
| 498 | dev_err(&tj9->client->dev, "read err int source\n"); |
| 499 | goto out; |
| 500 | } |
| 501 | |
Christopher Hudson | 0439166 | 2012-03-16 22:47:47 -0700 | [diff] [blame] | 502 | retval = (retval != 0x07 && retval != 0x08) ? -EIO : 0; |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 503 | |
| 504 | out: |
| 505 | kxtj9_device_power_off(tj9); |
| 506 | return retval; |
| 507 | } |
| 508 | |
| 509 | static int __devinit kxtj9_probe(struct i2c_client *client, |
| 510 | const struct i2c_device_id *id) |
| 511 | { |
| 512 | const struct kxtj9_platform_data *pdata = client->dev.platform_data; |
| 513 | struct kxtj9_data *tj9; |
| 514 | int err; |
| 515 | |
| 516 | if (!i2c_check_functionality(client->adapter, |
| 517 | I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE_DATA)) { |
| 518 | dev_err(&client->dev, "client is not i2c capable\n"); |
| 519 | return -ENXIO; |
| 520 | } |
| 521 | |
| 522 | if (!pdata) { |
| 523 | dev_err(&client->dev, "platform data is NULL; exiting\n"); |
| 524 | return -EINVAL; |
| 525 | } |
| 526 | |
| 527 | tj9 = kzalloc(sizeof(*tj9), GFP_KERNEL); |
| 528 | if (!tj9) { |
| 529 | dev_err(&client->dev, |
| 530 | "failed to allocate memory for module data\n"); |
| 531 | return -ENOMEM; |
| 532 | } |
| 533 | |
| 534 | tj9->client = client; |
| 535 | tj9->pdata = *pdata; |
| 536 | |
| 537 | if (pdata->init) { |
| 538 | err = pdata->init(); |
| 539 | if (err < 0) |
| 540 | goto err_free_mem; |
| 541 | } |
| 542 | |
| 543 | err = kxtj9_verify(tj9); |
| 544 | if (err < 0) { |
| 545 | dev_err(&client->dev, "device not recognized\n"); |
| 546 | goto err_pdata_exit; |
| 547 | } |
| 548 | |
| 549 | i2c_set_clientdata(client, tj9); |
| 550 | |
| 551 | tj9->ctrl_reg1 = tj9->pdata.res_12bit | tj9->pdata.g_range; |
Christopher Hudson | 0439166 | 2012-03-16 22:47:47 -0700 | [diff] [blame] | 552 | tj9->last_poll_interval = tj9->pdata.init_interval; |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 553 | |
| 554 | if (client->irq) { |
| 555 | /* If in irq mode, populate INT_CTRL_REG1 and enable DRDY. */ |
| 556 | tj9->int_ctrl |= KXTJ9_IEN | KXTJ9_IEA | KXTJ9_IEL; |
| 557 | tj9->ctrl_reg1 |= DRDYE; |
| 558 | |
| 559 | err = kxtj9_setup_input_device(tj9); |
| 560 | if (err) |
| 561 | goto err_pdata_exit; |
| 562 | |
| 563 | err = request_threaded_irq(client->irq, NULL, kxtj9_isr, |
| 564 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
| 565 | "kxtj9-irq", tj9); |
| 566 | if (err) { |
| 567 | dev_err(&client->dev, "request irq failed: %d\n", err); |
| 568 | goto err_destroy_input; |
| 569 | } |
| 570 | |
| 571 | err = sysfs_create_group(&client->dev.kobj, &kxtj9_attribute_group); |
| 572 | if (err) { |
| 573 | dev_err(&client->dev, "sysfs create failed: %d\n", err); |
| 574 | goto err_free_irq; |
| 575 | } |
| 576 | |
| 577 | } else { |
| 578 | err = kxtj9_setup_polled_device(tj9); |
| 579 | if (err) |
| 580 | goto err_pdata_exit; |
| 581 | } |
| 582 | |
| 583 | return 0; |
| 584 | |
| 585 | err_free_irq: |
| 586 | free_irq(client->irq, tj9); |
| 587 | err_destroy_input: |
| 588 | input_unregister_device(tj9->input_dev); |
| 589 | err_pdata_exit: |
| 590 | if (tj9->pdata.exit) |
| 591 | tj9->pdata.exit(); |
| 592 | err_free_mem: |
| 593 | kfree(tj9); |
| 594 | return err; |
| 595 | } |
| 596 | |
| 597 | static int __devexit kxtj9_remove(struct i2c_client *client) |
| 598 | { |
| 599 | struct kxtj9_data *tj9 = i2c_get_clientdata(client); |
| 600 | |
| 601 | if (client->irq) { |
| 602 | sysfs_remove_group(&client->dev.kobj, &kxtj9_attribute_group); |
| 603 | free_irq(client->irq, tj9); |
| 604 | input_unregister_device(tj9->input_dev); |
| 605 | } else { |
| 606 | kxtj9_teardown_polled_device(tj9); |
| 607 | } |
| 608 | |
| 609 | if (tj9->pdata.exit) |
| 610 | tj9->pdata.exit(); |
| 611 | |
| 612 | kfree(tj9); |
| 613 | |
| 614 | return 0; |
| 615 | } |
| 616 | |
| 617 | #ifdef CONFIG_PM_SLEEP |
| 618 | static int kxtj9_suspend(struct device *dev) |
| 619 | { |
| 620 | struct i2c_client *client = to_i2c_client(dev); |
| 621 | struct kxtj9_data *tj9 = i2c_get_clientdata(client); |
| 622 | struct input_dev *input_dev = tj9->input_dev; |
| 623 | |
| 624 | mutex_lock(&input_dev->mutex); |
| 625 | |
| 626 | if (input_dev->users) |
| 627 | kxtj9_disable(tj9); |
| 628 | |
| 629 | mutex_unlock(&input_dev->mutex); |
| 630 | return 0; |
| 631 | } |
| 632 | |
| 633 | static int kxtj9_resume(struct device *dev) |
| 634 | { |
| 635 | struct i2c_client *client = to_i2c_client(dev); |
| 636 | struct kxtj9_data *tj9 = i2c_get_clientdata(client); |
| 637 | struct input_dev *input_dev = tj9->input_dev; |
| 638 | int retval = 0; |
| 639 | |
| 640 | mutex_lock(&input_dev->mutex); |
| 641 | |
| 642 | if (input_dev->users) |
| 643 | kxtj9_enable(tj9); |
| 644 | |
| 645 | mutex_unlock(&input_dev->mutex); |
| 646 | return retval; |
| 647 | } |
| 648 | #endif |
| 649 | |
| 650 | static SIMPLE_DEV_PM_OPS(kxtj9_pm_ops, kxtj9_suspend, kxtj9_resume); |
| 651 | |
| 652 | static const struct i2c_device_id kxtj9_id[] = { |
| 653 | { NAME, 0 }, |
| 654 | { }, |
| 655 | }; |
| 656 | |
| 657 | MODULE_DEVICE_TABLE(i2c, kxtj9_id); |
| 658 | |
| 659 | static struct i2c_driver kxtj9_driver = { |
| 660 | .driver = { |
| 661 | .name = NAME, |
| 662 | .owner = THIS_MODULE, |
| 663 | .pm = &kxtj9_pm_ops, |
| 664 | }, |
| 665 | .probe = kxtj9_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame^] | 666 | .remove = kxtj9_remove, |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 667 | .id_table = kxtj9_id, |
| 668 | }; |
| 669 | |
Axel Lin | 1b92c1c | 2012-03-16 23:05:41 -0700 | [diff] [blame] | 670 | module_i2c_driver(kxtj9_driver); |
Chris Hudson | e8e70d8 | 2011-07-06 18:36:51 -0700 | [diff] [blame] | 671 | |
| 672 | MODULE_DESCRIPTION("KXTJ9 accelerometer driver"); |
| 673 | MODULE_AUTHOR("Chris Hudson <chudson@kionix.com>"); |
| 674 | MODULE_LICENSE("GPL"); |