Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Samsung Electronics Co., Ltd. |
| 3 | * Author: Beomho Seo <beomho.seo@samsung.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2, as published |
| 7 | * by the Free Software Foundation. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/delay.h> |
| 11 | #include <linux/err.h> |
| 12 | #include <linux/i2c.h> |
| 13 | #include <linux/mutex.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/regulator/consumer.h> |
| 17 | #include <linux/iio/iio.h> |
| 18 | #include <linux/iio/sysfs.h> |
| 19 | #include <linux/iio/events.h> |
| 20 | |
| 21 | /* Slave address 0x19 for PS of 7 bit addressing protocol for I2C */ |
| 22 | #define CM36651_I2C_ADDR_PS 0x19 |
| 23 | /* Alert Response Address */ |
| 24 | #define CM36651_ARA 0x0C |
| 25 | |
| 26 | /* Ambient light sensor */ |
| 27 | #define CM36651_CS_CONF1 0x00 |
| 28 | #define CM36651_CS_CONF2 0x01 |
| 29 | #define CM36651_ALS_WH_M 0x02 |
| 30 | #define CM36651_ALS_WH_L 0x03 |
| 31 | #define CM36651_ALS_WL_M 0x04 |
| 32 | #define CM36651_ALS_WL_L 0x05 |
| 33 | #define CM36651_CS_CONF3 0x06 |
| 34 | #define CM36651_CS_CONF_REG_NUM 0x02 |
| 35 | |
| 36 | /* Proximity sensor */ |
| 37 | #define CM36651_PS_CONF1 0x00 |
| 38 | #define CM36651_PS_THD 0x01 |
| 39 | #define CM36651_PS_CANC 0x02 |
| 40 | #define CM36651_PS_CONF2 0x03 |
| 41 | #define CM36651_PS_REG_NUM 0x04 |
| 42 | |
| 43 | /* CS_CONF1 command code */ |
| 44 | #define CM36651_ALS_ENABLE 0x00 |
| 45 | #define CM36651_ALS_DISABLE 0x01 |
| 46 | #define CM36651_ALS_INT_EN 0x02 |
| 47 | #define CM36651_ALS_THRES 0x04 |
| 48 | |
| 49 | /* CS_CONF2 command code */ |
| 50 | #define CM36651_CS_CONF2_DEFAULT_BIT 0x08 |
| 51 | |
| 52 | /* CS_CONF3 channel integration time */ |
| 53 | #define CM36651_CS_IT1 0x00 /* Integration time 80000 usec */ |
| 54 | #define CM36651_CS_IT2 0x40 /* Integration time 160000 usec */ |
| 55 | #define CM36651_CS_IT3 0x80 /* Integration time 320000 usec */ |
| 56 | #define CM36651_CS_IT4 0xC0 /* Integration time 640000 usec */ |
| 57 | |
| 58 | /* PS_CONF1 command code */ |
| 59 | #define CM36651_PS_ENABLE 0x00 |
| 60 | #define CM36651_PS_DISABLE 0x01 |
| 61 | #define CM36651_PS_INT_EN 0x02 |
| 62 | #define CM36651_PS_PERS2 0x04 |
| 63 | #define CM36651_PS_PERS3 0x08 |
| 64 | #define CM36651_PS_PERS4 0x0C |
| 65 | |
| 66 | /* PS_CONF1 command code: integration time */ |
| 67 | #define CM36651_PS_IT1 0x00 /* Integration time 320 usec */ |
| 68 | #define CM36651_PS_IT2 0x10 /* Integration time 420 usec */ |
| 69 | #define CM36651_PS_IT3 0x20 /* Integration time 520 usec */ |
| 70 | #define CM36651_PS_IT4 0x30 /* Integration time 640 usec */ |
| 71 | |
| 72 | /* PS_CONF1 command code: duty ratio */ |
| 73 | #define CM36651_PS_DR1 0x00 /* Duty ratio 1/80 */ |
| 74 | #define CM36651_PS_DR2 0x40 /* Duty ratio 1/160 */ |
| 75 | #define CM36651_PS_DR3 0x80 /* Duty ratio 1/320 */ |
| 76 | #define CM36651_PS_DR4 0xC0 /* Duty ratio 1/640 */ |
| 77 | |
| 78 | /* PS_THD command code */ |
| 79 | #define CM36651_PS_INITIAL_THD 0x05 |
| 80 | |
| 81 | /* PS_CANC command code */ |
| 82 | #define CM36651_PS_CANC_DEFAULT 0x00 |
| 83 | |
| 84 | /* PS_CONF2 command code */ |
| 85 | #define CM36651_PS_HYS1 0x00 |
| 86 | #define CM36651_PS_HYS2 0x01 |
| 87 | #define CM36651_PS_SMART_PERS_EN 0x02 |
| 88 | #define CM36651_PS_DIR_INT 0x04 |
| 89 | #define CM36651_PS_MS 0x10 |
| 90 | |
| 91 | #define CM36651_CS_COLOR_NUM 4 |
| 92 | |
| 93 | #define CM36651_CLOSE_PROXIMITY 0x32 |
| 94 | #define CM36651_FAR_PROXIMITY 0x33 |
| 95 | |
| 96 | #define CM36651_CS_INT_TIME_AVAIL "80000 160000 320000 640000" |
| 97 | #define CM36651_PS_INT_TIME_AVAIL "320 420 520 640" |
| 98 | |
| 99 | enum cm36651_operation_mode { |
| 100 | CM36651_LIGHT_EN, |
| 101 | CM36651_PROXIMITY_EN, |
| 102 | CM36651_PROXIMITY_EV_EN, |
| 103 | }; |
| 104 | |
| 105 | enum cm36651_light_channel_idx { |
| 106 | CM36651_LIGHT_CHANNEL_IDX_RED, |
| 107 | CM36651_LIGHT_CHANNEL_IDX_GREEN, |
| 108 | CM36651_LIGHT_CHANNEL_IDX_BLUE, |
| 109 | CM36651_LIGHT_CHANNEL_IDX_CLEAR, |
| 110 | }; |
| 111 | |
| 112 | enum cm36651_command { |
| 113 | CM36651_CMD_READ_RAW_LIGHT, |
| 114 | CM36651_CMD_READ_RAW_PROXIMITY, |
| 115 | CM36651_CMD_PROX_EV_EN, |
| 116 | CM36651_CMD_PROX_EV_DIS, |
| 117 | }; |
| 118 | |
| 119 | static const u8 cm36651_cs_reg[CM36651_CS_CONF_REG_NUM] = { |
| 120 | CM36651_CS_CONF1, |
| 121 | CM36651_CS_CONF2, |
| 122 | }; |
| 123 | |
| 124 | static const u8 cm36651_ps_reg[CM36651_PS_REG_NUM] = { |
| 125 | CM36651_PS_CONF1, |
| 126 | CM36651_PS_THD, |
| 127 | CM36651_PS_CANC, |
| 128 | CM36651_PS_CONF2, |
| 129 | }; |
| 130 | |
| 131 | struct cm36651_data { |
| 132 | const struct cm36651_platform_data *pdata; |
| 133 | struct i2c_client *client; |
| 134 | struct i2c_client *ps_client; |
| 135 | struct i2c_client *ara_client; |
| 136 | struct mutex lock; |
| 137 | struct regulator *vled_reg; |
| 138 | unsigned long flags; |
| 139 | int cs_int_time[CM36651_CS_COLOR_NUM]; |
| 140 | int ps_int_time; |
| 141 | u8 cs_ctrl_regs[CM36651_CS_CONF_REG_NUM]; |
| 142 | u8 ps_ctrl_regs[CM36651_PS_REG_NUM]; |
| 143 | u16 color[CM36651_CS_COLOR_NUM]; |
| 144 | }; |
| 145 | |
| 146 | static int cm36651_setup_reg(struct cm36651_data *cm36651) |
| 147 | { |
| 148 | struct i2c_client *client = cm36651->client; |
| 149 | struct i2c_client *ps_client = cm36651->ps_client; |
| 150 | int i, ret; |
| 151 | |
| 152 | /* CS initialization */ |
| 153 | cm36651->cs_ctrl_regs[CM36651_CS_CONF1] = CM36651_ALS_ENABLE | |
| 154 | CM36651_ALS_THRES; |
| 155 | cm36651->cs_ctrl_regs[CM36651_CS_CONF2] = CM36651_CS_CONF2_DEFAULT_BIT; |
| 156 | |
| 157 | for (i = 0; i < CM36651_CS_CONF_REG_NUM; i++) { |
| 158 | ret = i2c_smbus_write_byte_data(client, cm36651_cs_reg[i], |
| 159 | cm36651->cs_ctrl_regs[i]); |
| 160 | if (ret < 0) |
| 161 | return ret; |
| 162 | } |
| 163 | |
| 164 | /* PS initialization */ |
| 165 | cm36651->ps_ctrl_regs[CM36651_PS_CONF1] = CM36651_PS_ENABLE | |
| 166 | CM36651_PS_IT2; |
| 167 | cm36651->ps_ctrl_regs[CM36651_PS_THD] = CM36651_PS_INITIAL_THD; |
| 168 | cm36651->ps_ctrl_regs[CM36651_PS_CANC] = CM36651_PS_CANC_DEFAULT; |
| 169 | cm36651->ps_ctrl_regs[CM36651_PS_CONF2] = CM36651_PS_HYS2 | |
| 170 | CM36651_PS_DIR_INT | CM36651_PS_SMART_PERS_EN; |
| 171 | |
| 172 | for (i = 0; i < CM36651_PS_REG_NUM; i++) { |
| 173 | ret = i2c_smbus_write_byte_data(ps_client, cm36651_ps_reg[i], |
| 174 | cm36651->ps_ctrl_regs[i]); |
| 175 | if (ret < 0) |
| 176 | return ret; |
| 177 | } |
| 178 | |
| 179 | /* Set shutdown mode */ |
| 180 | ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1, |
| 181 | CM36651_ALS_DISABLE); |
| 182 | if (ret < 0) |
| 183 | return ret; |
| 184 | |
| 185 | ret = i2c_smbus_write_byte_data(cm36651->ps_client, |
| 186 | CM36651_PS_CONF1, CM36651_PS_DISABLE); |
| 187 | if (ret < 0) |
| 188 | return ret; |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int cm36651_read_output(struct cm36651_data *cm36651, |
| 194 | struct iio_chan_spec const *chan, int *val) |
| 195 | { |
| 196 | struct i2c_client *client = cm36651->client; |
| 197 | int ret = -EINVAL; |
| 198 | |
| 199 | switch (chan->type) { |
| 200 | case IIO_LIGHT: |
| 201 | *val = i2c_smbus_read_word_data(client, chan->address); |
| 202 | if (*val < 0) |
| 203 | return ret; |
| 204 | |
| 205 | ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1, |
| 206 | CM36651_ALS_DISABLE); |
| 207 | if (ret < 0) |
| 208 | return ret; |
| 209 | |
| 210 | ret = IIO_VAL_INT; |
| 211 | break; |
| 212 | case IIO_PROXIMITY: |
| 213 | *val = i2c_smbus_read_byte(cm36651->ps_client); |
| 214 | if (*val < 0) |
| 215 | return ret; |
| 216 | |
| 217 | if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) { |
| 218 | ret = i2c_smbus_write_byte_data(cm36651->ps_client, |
| 219 | CM36651_PS_CONF1, CM36651_PS_DISABLE); |
| 220 | if (ret < 0) |
| 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | ret = IIO_VAL_INT; |
| 225 | break; |
| 226 | default: |
| 227 | break; |
| 228 | } |
| 229 | |
| 230 | return ret; |
| 231 | } |
| 232 | |
| 233 | static irqreturn_t cm36651_irq_handler(int irq, void *data) |
| 234 | { |
| 235 | struct iio_dev *indio_dev = data; |
| 236 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 237 | struct i2c_client *client = cm36651->client; |
| 238 | int ev_dir, ret; |
| 239 | u64 ev_code; |
| 240 | |
| 241 | /* |
| 242 | * The PS INT pin is an active low signal that PS INT move logic low |
| 243 | * when the object is detect. Once the MCU host received the PS INT |
| 244 | * "LOW" signal, the Host needs to read the data at Alert Response |
| 245 | * Address(ARA) to clear the PS INT signal. After clearing the PS |
| 246 | * INT pin, the PS INT signal toggles from low to high. |
| 247 | */ |
| 248 | ret = i2c_smbus_read_byte(cm36651->ara_client); |
| 249 | if (ret < 0) { |
| 250 | dev_err(&client->dev, |
| 251 | "%s: Data read failed: %d\n", __func__, ret); |
| 252 | return IRQ_HANDLED; |
| 253 | } |
| 254 | switch (ret) { |
| 255 | case CM36651_CLOSE_PROXIMITY: |
| 256 | ev_dir = IIO_EV_DIR_RISING; |
| 257 | break; |
| 258 | case CM36651_FAR_PROXIMITY: |
| 259 | ev_dir = IIO_EV_DIR_FALLING; |
| 260 | break; |
| 261 | default: |
| 262 | dev_err(&client->dev, |
| 263 | "%s: Data read wrong: %d\n", __func__, ret); |
| 264 | return IRQ_HANDLED; |
| 265 | } |
| 266 | |
| 267 | ev_code = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, |
| 268 | CM36651_CMD_READ_RAW_PROXIMITY, |
| 269 | IIO_EV_TYPE_THRESH, ev_dir); |
| 270 | |
| 271 | iio_push_event(indio_dev, ev_code, iio_get_time_ns()); |
| 272 | |
| 273 | return IRQ_HANDLED; |
| 274 | } |
| 275 | |
| 276 | static int cm36651_set_operation_mode(struct cm36651_data *cm36651, int cmd) |
| 277 | { |
| 278 | struct i2c_client *client = cm36651->client; |
| 279 | struct i2c_client *ps_client = cm36651->ps_client; |
| 280 | int ret = -EINVAL; |
| 281 | |
| 282 | switch (cmd) { |
| 283 | case CM36651_CMD_READ_RAW_LIGHT: |
| 284 | ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1, |
| 285 | cm36651->cs_ctrl_regs[CM36651_CS_CONF1]); |
| 286 | break; |
| 287 | case CM36651_CMD_READ_RAW_PROXIMITY: |
| 288 | if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) |
| 289 | return CM36651_PROXIMITY_EV_EN; |
| 290 | |
| 291 | ret = i2c_smbus_write_byte_data(ps_client, CM36651_PS_CONF1, |
| 292 | cm36651->ps_ctrl_regs[CM36651_PS_CONF1]); |
| 293 | break; |
| 294 | case CM36651_CMD_PROX_EV_EN: |
| 295 | if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) { |
| 296 | dev_err(&client->dev, |
| 297 | "Already proximity event enable state\n"); |
| 298 | return ret; |
| 299 | } |
| 300 | set_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags); |
| 301 | |
| 302 | ret = i2c_smbus_write_byte_data(ps_client, |
| 303 | cm36651_ps_reg[CM36651_PS_CONF1], |
| 304 | CM36651_PS_INT_EN | CM36651_PS_PERS2 | CM36651_PS_IT2); |
| 305 | |
| 306 | if (ret < 0) { |
| 307 | dev_err(&client->dev, "Proximity enable event failed\n"); |
| 308 | return ret; |
| 309 | } |
| 310 | break; |
| 311 | case CM36651_CMD_PROX_EV_DIS: |
| 312 | if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) { |
| 313 | dev_err(&client->dev, |
| 314 | "Already proximity event disable state\n"); |
| 315 | return ret; |
| 316 | } |
| 317 | clear_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags); |
| 318 | ret = i2c_smbus_write_byte_data(ps_client, |
| 319 | CM36651_PS_CONF1, CM36651_PS_DISABLE); |
| 320 | break; |
| 321 | } |
| 322 | |
| 323 | if (ret < 0) |
| 324 | dev_err(&client->dev, "Write register failed\n"); |
| 325 | |
| 326 | return ret; |
| 327 | } |
| 328 | |
| 329 | static int cm36651_read_channel(struct cm36651_data *cm36651, |
| 330 | struct iio_chan_spec const *chan, int *val) |
| 331 | { |
| 332 | struct i2c_client *client = cm36651->client; |
| 333 | int cmd, ret; |
| 334 | |
| 335 | if (chan->type == IIO_LIGHT) |
| 336 | cmd = CM36651_CMD_READ_RAW_LIGHT; |
| 337 | else if (chan->type == IIO_PROXIMITY) |
| 338 | cmd = CM36651_CMD_READ_RAW_PROXIMITY; |
| 339 | else |
| 340 | return -EINVAL; |
| 341 | |
| 342 | ret = cm36651_set_operation_mode(cm36651, cmd); |
| 343 | if (ret < 0) { |
| 344 | dev_err(&client->dev, "CM36651 set operation mode failed\n"); |
| 345 | return ret; |
| 346 | } |
| 347 | /* Delay for work after enable operation */ |
| 348 | msleep(50); |
| 349 | ret = cm36651_read_output(cm36651, chan, val); |
| 350 | if (ret < 0) { |
| 351 | dev_err(&client->dev, "CM36651 read output failed\n"); |
| 352 | return ret; |
| 353 | } |
| 354 | |
| 355 | return ret; |
| 356 | } |
| 357 | |
| 358 | static int cm36651_read_int_time(struct cm36651_data *cm36651, |
| 359 | struct iio_chan_spec const *chan, int *val) |
| 360 | { |
| 361 | switch (chan->type) { |
| 362 | case IIO_LIGHT: |
| 363 | if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT1) |
| 364 | *val = 80000; |
| 365 | else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT2) |
| 366 | *val = 160000; |
| 367 | else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT3) |
| 368 | *val = 320000; |
| 369 | else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT4) |
| 370 | *val = 640000; |
| 371 | else |
| 372 | return -EINVAL; |
| 373 | break; |
| 374 | case IIO_PROXIMITY: |
| 375 | if (cm36651->ps_int_time == CM36651_PS_IT1) |
| 376 | *val = 320; |
| 377 | else if (cm36651->ps_int_time == CM36651_PS_IT2) |
| 378 | *val = 420; |
| 379 | else if (cm36651->ps_int_time == CM36651_PS_IT3) |
| 380 | *val = 520; |
| 381 | else if (cm36651->ps_int_time == CM36651_PS_IT4) |
| 382 | *val = 640; |
| 383 | else |
| 384 | return -EINVAL; |
| 385 | break; |
| 386 | default: |
| 387 | return -EINVAL; |
| 388 | } |
| 389 | |
| 390 | return IIO_VAL_INT_PLUS_MICRO; |
| 391 | } |
| 392 | |
| 393 | static int cm36651_write_int_time(struct cm36651_data *cm36651, |
| 394 | struct iio_chan_spec const *chan, int val) |
| 395 | { |
| 396 | struct i2c_client *client = cm36651->client; |
| 397 | struct i2c_client *ps_client = cm36651->ps_client; |
| 398 | int int_time, ret; |
| 399 | |
| 400 | switch (chan->type) { |
| 401 | case IIO_LIGHT: |
| 402 | if (val == 80000) |
| 403 | int_time = CM36651_CS_IT1; |
| 404 | else if (val == 160000) |
| 405 | int_time = CM36651_CS_IT2; |
| 406 | else if (val == 320000) |
| 407 | int_time = CM36651_CS_IT3; |
| 408 | else if (val == 640000) |
| 409 | int_time = CM36651_CS_IT4; |
| 410 | else |
| 411 | return -EINVAL; |
| 412 | |
| 413 | ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF3, |
| 414 | int_time >> 2 * (chan->address)); |
| 415 | if (ret < 0) { |
| 416 | dev_err(&client->dev, "CS integration time write failed\n"); |
| 417 | return ret; |
| 418 | } |
| 419 | cm36651->cs_int_time[chan->address] = int_time; |
| 420 | break; |
| 421 | case IIO_PROXIMITY: |
| 422 | if (val == 320) |
| 423 | int_time = CM36651_PS_IT1; |
| 424 | else if (val == 420) |
| 425 | int_time = CM36651_PS_IT2; |
| 426 | else if (val == 520) |
| 427 | int_time = CM36651_PS_IT3; |
| 428 | else if (val == 640) |
| 429 | int_time = CM36651_PS_IT4; |
| 430 | else |
| 431 | return -EINVAL; |
| 432 | |
| 433 | ret = i2c_smbus_write_byte_data(ps_client, |
| 434 | CM36651_PS_CONF1, int_time); |
| 435 | if (ret < 0) { |
| 436 | dev_err(&client->dev, "PS integration time write failed\n"); |
| 437 | return ret; |
| 438 | } |
| 439 | cm36651->ps_int_time = int_time; |
| 440 | break; |
| 441 | default: |
| 442 | return -EINVAL; |
| 443 | } |
| 444 | |
| 445 | return ret; |
| 446 | } |
| 447 | |
| 448 | static int cm36651_read_raw(struct iio_dev *indio_dev, |
| 449 | struct iio_chan_spec const *chan, |
| 450 | int *val, int *val2, long mask) |
| 451 | { |
| 452 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 453 | int ret; |
| 454 | |
| 455 | mutex_lock(&cm36651->lock); |
| 456 | |
| 457 | switch (mask) { |
| 458 | case IIO_CHAN_INFO_RAW: |
| 459 | ret = cm36651_read_channel(cm36651, chan, val); |
| 460 | break; |
| 461 | case IIO_CHAN_INFO_INT_TIME: |
| 462 | ret = cm36651_read_int_time(cm36651, chan, val); |
| 463 | break; |
| 464 | default: |
| 465 | ret = -EINVAL; |
| 466 | } |
| 467 | |
| 468 | mutex_unlock(&cm36651->lock); |
| 469 | |
| 470 | return ret; |
| 471 | } |
| 472 | |
| 473 | static int cm36651_write_raw(struct iio_dev *indio_dev, |
| 474 | struct iio_chan_spec const *chan, |
| 475 | int val, int val2, long mask) |
| 476 | { |
| 477 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 478 | struct i2c_client *client = cm36651->client; |
| 479 | int ret = -EINVAL; |
| 480 | |
| 481 | if (mask == IIO_CHAN_INFO_INT_TIME) { |
| 482 | ret = cm36651_write_int_time(cm36651, chan, val); |
| 483 | if (ret < 0) |
| 484 | dev_err(&client->dev, "Integration time write failed\n"); |
| 485 | } |
| 486 | |
| 487 | return ret; |
| 488 | } |
| 489 | |
| 490 | static int cm36651_read_prox_thresh(struct iio_dev *indio_dev, |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 491 | const struct iio_chan_spec *chan, |
| 492 | enum iio_event_type type, |
| 493 | enum iio_event_direction dir, |
| 494 | enum iio_event_info info, |
| 495 | int *val, int *val2) |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 496 | { |
| 497 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 498 | |
| 499 | *val = cm36651->ps_ctrl_regs[CM36651_PS_THD]; |
| 500 | |
| 501 | return 0; |
| 502 | } |
| 503 | |
| 504 | static int cm36651_write_prox_thresh(struct iio_dev *indio_dev, |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 505 | const struct iio_chan_spec *chan, |
| 506 | enum iio_event_type type, |
| 507 | enum iio_event_direction dir, |
| 508 | enum iio_event_info info, |
| 509 | int val, int val2) |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 510 | { |
| 511 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 512 | struct i2c_client *client = cm36651->client; |
| 513 | int ret; |
| 514 | |
| 515 | if (val < 3 || val > 255) |
| 516 | return -EINVAL; |
| 517 | |
| 518 | cm36651->ps_ctrl_regs[CM36651_PS_THD] = val; |
| 519 | ret = i2c_smbus_write_byte_data(cm36651->ps_client, CM36651_PS_THD, |
| 520 | cm36651->ps_ctrl_regs[CM36651_PS_THD]); |
| 521 | |
| 522 | if (ret < 0) { |
| 523 | dev_err(&client->dev, "PS threshold write failed: %d\n", ret); |
| 524 | return ret; |
| 525 | } |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static int cm36651_write_prox_event_config(struct iio_dev *indio_dev, |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 531 | const struct iio_chan_spec *chan, |
| 532 | enum iio_event_type type, |
| 533 | enum iio_event_direction dir, |
| 534 | int state) |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 535 | { |
| 536 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 537 | int cmd, ret = -EINVAL; |
| 538 | |
| 539 | mutex_lock(&cm36651->lock); |
| 540 | |
| 541 | cmd = state ? CM36651_CMD_PROX_EV_EN : CM36651_CMD_PROX_EV_DIS; |
| 542 | ret = cm36651_set_operation_mode(cm36651, cmd); |
| 543 | |
| 544 | mutex_unlock(&cm36651->lock); |
| 545 | |
| 546 | return ret; |
| 547 | } |
| 548 | |
| 549 | static int cm36651_read_prox_event_config(struct iio_dev *indio_dev, |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 550 | const struct iio_chan_spec *chan, |
| 551 | enum iio_event_type type, |
| 552 | enum iio_event_direction dir) |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 553 | { |
| 554 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 555 | int event_en; |
| 556 | |
| 557 | mutex_lock(&cm36651->lock); |
| 558 | |
| 559 | event_en = test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags); |
| 560 | |
| 561 | mutex_unlock(&cm36651->lock); |
| 562 | |
| 563 | return event_en; |
| 564 | } |
| 565 | |
| 566 | #define CM36651_LIGHT_CHANNEL(_color, _idx) { \ |
| 567 | .type = IIO_LIGHT, \ |
| 568 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ |
| 569 | BIT(IIO_CHAN_INFO_INT_TIME), \ |
| 570 | .address = _idx, \ |
| 571 | .modified = 1, \ |
| 572 | .channel2 = IIO_MOD_LIGHT_##_color, \ |
| 573 | } \ |
| 574 | |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 575 | static const struct iio_event_spec cm36651_event_spec[] = { |
| 576 | { |
| 577 | .type = IIO_EV_TYPE_THRESH, |
| 578 | .dir = IIO_EV_DIR_EITHER, |
| 579 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| 580 | BIT(IIO_EV_INFO_ENABLE), |
| 581 | } |
| 582 | }; |
| 583 | |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 584 | static const struct iio_chan_spec cm36651_channels[] = { |
| 585 | { |
| 586 | .type = IIO_PROXIMITY, |
| 587 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 588 | BIT(IIO_CHAN_INFO_INT_TIME), |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 589 | .event_spec = cm36651_event_spec, |
| 590 | .num_event_specs = ARRAY_SIZE(cm36651_event_spec), |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 591 | }, |
| 592 | CM36651_LIGHT_CHANNEL(RED, CM36651_LIGHT_CHANNEL_IDX_RED), |
| 593 | CM36651_LIGHT_CHANNEL(GREEN, CM36651_LIGHT_CHANNEL_IDX_GREEN), |
| 594 | CM36651_LIGHT_CHANNEL(BLUE, CM36651_LIGHT_CHANNEL_IDX_BLUE), |
| 595 | CM36651_LIGHT_CHANNEL(CLEAR, CM36651_LIGHT_CHANNEL_IDX_CLEAR), |
| 596 | }; |
| 597 | |
| 598 | static IIO_CONST_ATTR(in_illuminance_integration_time_available, |
| 599 | CM36651_CS_INT_TIME_AVAIL); |
| 600 | static IIO_CONST_ATTR(in_proximity_integration_time_available, |
| 601 | CM36651_PS_INT_TIME_AVAIL); |
| 602 | |
| 603 | static struct attribute *cm36651_attributes[] = { |
| 604 | &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr, |
| 605 | &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, |
| 606 | NULL, |
| 607 | }; |
| 608 | |
| 609 | static const struct attribute_group cm36651_attribute_group = { |
| 610 | .attrs = cm36651_attributes |
| 611 | }; |
| 612 | |
| 613 | static const struct iio_info cm36651_info = { |
| 614 | .driver_module = THIS_MODULE, |
| 615 | .read_raw = &cm36651_read_raw, |
| 616 | .write_raw = &cm36651_write_raw, |
Lars-Peter Clausen | bb7f9d9 | 2013-12-07 10:45:00 +0000 | [diff] [blame^] | 617 | .read_event_value_new = &cm36651_read_prox_thresh, |
| 618 | .write_event_value_new = &cm36651_write_prox_thresh, |
| 619 | .read_event_config_new = &cm36651_read_prox_event_config, |
| 620 | .write_event_config_new = &cm36651_write_prox_event_config, |
Beomho Seo | e590d45 | 2013-10-17 03:22:00 +0100 | [diff] [blame] | 621 | .attrs = &cm36651_attribute_group, |
| 622 | }; |
| 623 | |
| 624 | static int cm36651_probe(struct i2c_client *client, |
| 625 | const struct i2c_device_id *id) |
| 626 | { |
| 627 | struct cm36651_data *cm36651; |
| 628 | struct iio_dev *indio_dev; |
| 629 | int ret; |
| 630 | |
| 631 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm36651)); |
| 632 | if (!indio_dev) |
| 633 | return -ENOMEM; |
| 634 | |
| 635 | cm36651 = iio_priv(indio_dev); |
| 636 | |
| 637 | cm36651->vled_reg = devm_regulator_get(&client->dev, "vled"); |
| 638 | if (IS_ERR(cm36651->vled_reg)) { |
| 639 | dev_err(&client->dev, "get regulator vled failed\n"); |
| 640 | return PTR_ERR(cm36651->vled_reg); |
| 641 | } |
| 642 | |
| 643 | ret = regulator_enable(cm36651->vled_reg); |
| 644 | if (ret) { |
| 645 | dev_err(&client->dev, "enable regulator vled failed\n"); |
| 646 | return ret; |
| 647 | } |
| 648 | |
| 649 | i2c_set_clientdata(client, indio_dev); |
| 650 | |
| 651 | cm36651->client = client; |
| 652 | cm36651->ps_client = i2c_new_dummy(client->adapter, |
| 653 | CM36651_I2C_ADDR_PS); |
| 654 | cm36651->ara_client = i2c_new_dummy(client->adapter, CM36651_ARA); |
| 655 | mutex_init(&cm36651->lock); |
| 656 | indio_dev->dev.parent = &client->dev; |
| 657 | indio_dev->channels = cm36651_channels; |
| 658 | indio_dev->num_channels = ARRAY_SIZE(cm36651_channels); |
| 659 | indio_dev->info = &cm36651_info; |
| 660 | indio_dev->name = id->name; |
| 661 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 662 | |
| 663 | ret = cm36651_setup_reg(cm36651); |
| 664 | if (ret) { |
| 665 | dev_err(&client->dev, "%s: register setup failed\n", __func__); |
| 666 | goto error_disable_reg; |
| 667 | } |
| 668 | |
| 669 | ret = request_threaded_irq(client->irq, NULL, cm36651_irq_handler, |
| 670 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 671 | "cm36651", indio_dev); |
| 672 | if (ret) { |
| 673 | dev_err(&client->dev, "%s: request irq failed\n", __func__); |
| 674 | goto error_disable_reg; |
| 675 | } |
| 676 | |
| 677 | ret = iio_device_register(indio_dev); |
| 678 | if (ret) { |
| 679 | dev_err(&client->dev, "%s: regist device failed\n", __func__); |
| 680 | goto error_free_irq; |
| 681 | } |
| 682 | |
| 683 | return 0; |
| 684 | |
| 685 | error_free_irq: |
| 686 | free_irq(client->irq, indio_dev); |
| 687 | error_disable_reg: |
| 688 | regulator_disable(cm36651->vled_reg); |
| 689 | return ret; |
| 690 | } |
| 691 | |
| 692 | static int cm36651_remove(struct i2c_client *client) |
| 693 | { |
| 694 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 695 | struct cm36651_data *cm36651 = iio_priv(indio_dev); |
| 696 | |
| 697 | iio_device_unregister(indio_dev); |
| 698 | regulator_disable(cm36651->vled_reg); |
| 699 | free_irq(client->irq, indio_dev); |
| 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | static const struct i2c_device_id cm36651_id[] = { |
| 705 | { "cm36651", 0 }, |
| 706 | { } |
| 707 | }; |
| 708 | |
| 709 | MODULE_DEVICE_TABLE(i2c, cm36651_id); |
| 710 | |
| 711 | static const struct of_device_id cm36651_of_match[] = { |
| 712 | { .compatible = "capella,cm36651" }, |
| 713 | { } |
| 714 | }; |
| 715 | |
| 716 | static struct i2c_driver cm36651_driver = { |
| 717 | .driver = { |
| 718 | .name = "cm36651", |
| 719 | .of_match_table = of_match_ptr(cm36651_of_match), |
| 720 | .owner = THIS_MODULE, |
| 721 | }, |
| 722 | .probe = cm36651_probe, |
| 723 | .remove = cm36651_remove, |
| 724 | .id_table = cm36651_id, |
| 725 | }; |
| 726 | |
| 727 | module_i2c_driver(cm36651_driver); |
| 728 | |
| 729 | MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>"); |
| 730 | MODULE_DESCRIPTION("CM36651 proximity/ambient light sensor driver"); |
| 731 | MODULE_LICENSE("GPL v2"); |