1/* 2 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 3 * Author: Jacek Anaszewski <j.anaszewski@samsung.com> 4 * 5 * IIO features supported by the driver: 6 * 7 * Read-only raw channels: 8 * - illuminance_clear [lux] 9 * - illuminance_ir 10 * - proximity 11 * 12 * Triggered buffer: 13 * - illuminance_clear 14 * - illuminance_ir 15 * - proximity 16 * 17 * Events: 18 * - illuminance_clear (rising and falling) 19 * - proximity (rising and falling) 20 * - both falling and rising thresholds for the proximity events 21 * must be set to the values greater than 0. 22 * 23 * The driver supports triggered buffers for all the three 24 * channels as well as high and low threshold events for the 25 * illuminance_clear and proxmimity channels. Triggers 26 * can be enabled simultaneously with both illuminance_clear 27 * events. Proximity events cannot be enabled simultaneously 28 * with any triggers or illuminance events. Enabling/disabling 29 * one of the proximity events automatically enables/disables 30 * the other one. 31 * 32 * This program is free software; you can redistribute it and/or modify 33 * it under the terms of the GNU General Public License version 2, as 34 * published by the Free Software Foundation. 35 */ 36 37#include <linux/debugfs.h> 38#include <linux/delay.h> 39#include <linux/i2c.h> 40#include <linux/interrupt.h> 41#include <linux/irq.h> 42#include <linux/irq_work.h> 43#include <linux/module.h> 44#include <linux/mutex.h> 45#include <linux/of.h> 46#include <linux/regmap.h> 47#include <linux/regulator/consumer.h> 48#include <linux/slab.h> 49#include <asm/unaligned.h> 50#include <linux/iio/buffer.h> 51#include <linux/iio/events.h> 52#include <linux/iio/iio.h> 53#include <linux/iio/sysfs.h> 54#include <linux/iio/trigger.h> 55#include <linux/iio/trigger_consumer.h> 56#include <linux/iio/triggered_buffer.h> 57 58#define GP2A_I2C_NAME "gp2ap020a00f" 59 60/* Registers */ 61#define GP2AP020A00F_OP_REG 0x00 /* Basic operations */ 62#define GP2AP020A00F_ALS_REG 0x01 /* ALS related settings */ 63#define GP2AP020A00F_PS_REG 0x02 /* PS related settings */ 64#define GP2AP020A00F_LED_REG 0x03 /* LED reg */ 65#define GP2AP020A00F_TL_L_REG 0x04 /* ALS: Threshold low LSB */ 66#define GP2AP020A00F_TL_H_REG 0x05 /* ALS: Threshold low MSB */ 67#define GP2AP020A00F_TH_L_REG 0x06 /* ALS: Threshold high LSB */ 68#define GP2AP020A00F_TH_H_REG 0x07 /* ALS: Threshold high MSB */ 69#define GP2AP020A00F_PL_L_REG 0x08 /* PS: Threshold low LSB */ 70#define GP2AP020A00F_PL_H_REG 0x09 /* PS: Threshold low MSB */ 71#define GP2AP020A00F_PH_L_REG 0x0a /* PS: Threshold high LSB */ 72#define GP2AP020A00F_PH_H_REG 0x0b /* PS: Threshold high MSB */ 73#define GP2AP020A00F_D0_L_REG 0x0c /* ALS result: Clear/Illuminance LSB */ 74#define GP2AP020A00F_D0_H_REG 0x0d /* ALS result: Clear/Illuminance MSB */ 75#define GP2AP020A00F_D1_L_REG 0x0e /* ALS result: IR LSB */ 76#define GP2AP020A00F_D1_H_REG 0x0f /* ALS result: IR LSB */ 77#define GP2AP020A00F_D2_L_REG 0x10 /* PS result LSB */ 78#define GP2AP020A00F_D2_H_REG 0x11 /* PS result MSB */ 79#define GP2AP020A00F_NUM_REGS 0x12 /* Number of registers */ 80 81/* OP_REG bits */ 82#define GP2AP020A00F_OP3_MASK 0x80 /* Software shutdown */ 83#define GP2AP020A00F_OP3_SHUTDOWN 0x00 84#define GP2AP020A00F_OP3_OPERATION 0x80 85#define GP2AP020A00F_OP2_MASK 0x40 /* Auto shutdown/Continuous mode */ 86#define GP2AP020A00F_OP2_AUTO_SHUTDOWN 0x00 87#define GP2AP020A00F_OP2_CONT_OPERATION 0x40 88#define GP2AP020A00F_OP_MASK 0x30 /* Operating mode selection */ 89#define GP2AP020A00F_OP_ALS_AND_PS 0x00 90#define GP2AP020A00F_OP_ALS 0x10 91#define GP2AP020A00F_OP_PS 0x20 92#define GP2AP020A00F_OP_DEBUG 0x30 93#define GP2AP020A00F_PROX_MASK 0x08 /* PS: detection/non-detection */ 94#define GP2AP020A00F_PROX_NON_DETECT 0x00 95#define GP2AP020A00F_PROX_DETECT 0x08 96#define GP2AP020A00F_FLAG_P 0x04 /* PS: interrupt result */ 97#define GP2AP020A00F_FLAG_A 0x02 /* ALS: interrupt result */ 98#define GP2AP020A00F_TYPE_MASK 0x01 /* Output data type selection */ 99#define GP2AP020A00F_TYPE_MANUAL_CALC 0x00 100#define GP2AP020A00F_TYPE_AUTO_CALC 0x01 101 102/* ALS_REG bits */ 103#define GP2AP020A00F_PRST_MASK 0xc0 /* Number of measurement cycles */ 104#define GP2AP020A00F_PRST_ONCE 0x00 105#define GP2AP020A00F_PRST_4_CYCLES 0x40 106#define GP2AP020A00F_PRST_8_CYCLES 0x80 107#define GP2AP020A00F_PRST_16_CYCLES 0xc0 108#define GP2AP020A00F_RES_A_MASK 0x38 /* ALS: Resolution */ 109#define GP2AP020A00F_RES_A_800ms 0x00 110#define GP2AP020A00F_RES_A_400ms 0x08 111#define GP2AP020A00F_RES_A_200ms 0x10 112#define GP2AP020A00F_RES_A_100ms 0x18 113#define GP2AP020A00F_RES_A_25ms 0x20 114#define GP2AP020A00F_RES_A_6_25ms 0x28 115#define GP2AP020A00F_RES_A_1_56ms 0x30 116#define GP2AP020A00F_RES_A_0_39ms 0x38 117#define GP2AP020A00F_RANGE_A_MASK 0x07 /* ALS: Max measurable range */ 118#define GP2AP020A00F_RANGE_A_x1 0x00 119#define GP2AP020A00F_RANGE_A_x2 0x01 120#define GP2AP020A00F_RANGE_A_x4 0x02 121#define GP2AP020A00F_RANGE_A_x8 0x03 122#define GP2AP020A00F_RANGE_A_x16 0x04 123#define GP2AP020A00F_RANGE_A_x32 0x05 124#define GP2AP020A00F_RANGE_A_x64 0x06 125#define GP2AP020A00F_RANGE_A_x128 0x07 126 127/* PS_REG bits */ 128#define GP2AP020A00F_ALC_MASK 0x80 /* Auto light cancel */ 129#define GP2AP020A00F_ALC_ON 0x80 130#define GP2AP020A00F_ALC_OFF 0x00 131#define GP2AP020A00F_INTTYPE_MASK 0x40 /* Interrupt type setting */ 132#define GP2AP020A00F_INTTYPE_LEVEL 0x00 133#define GP2AP020A00F_INTTYPE_PULSE 0x40 134#define GP2AP020A00F_RES_P_MASK 0x38 /* PS: Resolution */ 135#define GP2AP020A00F_RES_P_800ms_x2 0x00 136#define GP2AP020A00F_RES_P_400ms_x2 0x08 137#define GP2AP020A00F_RES_P_200ms_x2 0x10 138#define GP2AP020A00F_RES_P_100ms_x2 0x18 139#define GP2AP020A00F_RES_P_25ms_x2 0x20 140#define GP2AP020A00F_RES_P_6_25ms_x2 0x28 141#define GP2AP020A00F_RES_P_1_56ms_x2 0x30 142#define GP2AP020A00F_RES_P_0_39ms_x2 0x38 143#define GP2AP020A00F_RANGE_P_MASK 0x07 /* PS: Max measurable range */ 144#define GP2AP020A00F_RANGE_P_x1 0x00 145#define GP2AP020A00F_RANGE_P_x2 0x01 146#define GP2AP020A00F_RANGE_P_x4 0x02 147#define GP2AP020A00F_RANGE_P_x8 0x03 148#define GP2AP020A00F_RANGE_P_x16 0x04 149#define GP2AP020A00F_RANGE_P_x32 0x05 150#define GP2AP020A00F_RANGE_P_x64 0x06 151#define GP2AP020A00F_RANGE_P_x128 0x07 152 153/* LED reg bits */ 154#define GP2AP020A00F_INTVAL_MASK 0xc0 /* Intermittent operating */ 155#define GP2AP020A00F_INTVAL_0 0x00 156#define GP2AP020A00F_INTVAL_4 0x40 157#define GP2AP020A00F_INTVAL_8 0x80 158#define GP2AP020A00F_INTVAL_16 0xc0 159#define GP2AP020A00F_IS_MASK 0x30 /* ILED drive peak current */ 160#define GP2AP020A00F_IS_13_8mA 0x00 161#define GP2AP020A00F_IS_27_5mA 0x10 162#define GP2AP020A00F_IS_55mA 0x20 163#define GP2AP020A00F_IS_110mA 0x30 164#define GP2AP020A00F_PIN_MASK 0x0c /* INT terminal setting */ 165#define GP2AP020A00F_PIN_ALS_OR_PS 0x00 166#define GP2AP020A00F_PIN_ALS 0x04 167#define GP2AP020A00F_PIN_PS 0x08 168#define GP2AP020A00F_PIN_PS_DETECT 0x0c 169#define GP2AP020A00F_FREQ_MASK 0x02 /* LED modulation frequency */ 170#define GP2AP020A00F_FREQ_327_5kHz 0x00 171#define GP2AP020A00F_FREQ_81_8kHz 0x02 172#define GP2AP020A00F_RST 0x01 /* Software reset */ 173 174#define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR 0 175#define GP2AP020A00F_SCAN_MODE_LIGHT_IR 1 176#define GP2AP020A00F_SCAN_MODE_PROXIMITY 2 177#define GP2AP020A00F_CHAN_TIMESTAMP 3 178 179#define GP2AP020A00F_DATA_READY_TIMEOUT msecs_to_jiffies(1000) 180#define GP2AP020A00F_DATA_REG(chan) (GP2AP020A00F_D0_L_REG + \ 181 (chan) * 2) 182#define GP2AP020A00F_THRESH_REG(th_val_id) (GP2AP020A00F_TL_L_REG + \ 183 (th_val_id) * 2) 184#define GP2AP020A00F_THRESH_VAL_ID(reg_addr) ((reg_addr - 4) / 2) 185 186#define GP2AP020A00F_SUBTRACT_MODE 0 187#define GP2AP020A00F_ADD_MODE 1 188 189#define GP2AP020A00F_MAX_CHANNELS 3 190 191enum gp2ap020a00f_opmode { 192 GP2AP020A00F_OPMODE_READ_RAW_CLEAR, 193 GP2AP020A00F_OPMODE_READ_RAW_IR, 194 GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY, 195 GP2AP020A00F_OPMODE_ALS, 196 GP2AP020A00F_OPMODE_PS, 197 GP2AP020A00F_OPMODE_ALS_AND_PS, 198 GP2AP020A00F_OPMODE_PROX_DETECT, 199 GP2AP020A00F_OPMODE_SHUTDOWN, 200 GP2AP020A00F_NUM_OPMODES, 201}; 202 203enum gp2ap020a00f_cmd { 204 GP2AP020A00F_CMD_READ_RAW_CLEAR, 205 GP2AP020A00F_CMD_READ_RAW_IR, 206 GP2AP020A00F_CMD_READ_RAW_PROXIMITY, 207 GP2AP020A00F_CMD_TRIGGER_CLEAR_EN, 208 GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS, 209 GP2AP020A00F_CMD_TRIGGER_IR_EN, 210 GP2AP020A00F_CMD_TRIGGER_IR_DIS, 211 GP2AP020A00F_CMD_TRIGGER_PROX_EN, 212 GP2AP020A00F_CMD_TRIGGER_PROX_DIS, 213 GP2AP020A00F_CMD_ALS_HIGH_EV_EN, 214 GP2AP020A00F_CMD_ALS_HIGH_EV_DIS, 215 GP2AP020A00F_CMD_ALS_LOW_EV_EN, 216 GP2AP020A00F_CMD_ALS_LOW_EV_DIS, 217 GP2AP020A00F_CMD_PROX_HIGH_EV_EN, 218 GP2AP020A00F_CMD_PROX_HIGH_EV_DIS, 219 GP2AP020A00F_CMD_PROX_LOW_EV_EN, 220 GP2AP020A00F_CMD_PROX_LOW_EV_DIS, 221}; 222 223enum gp2ap020a00f_flags { 224 GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, 225 GP2AP020A00F_FLAG_ALS_IR_TRIGGER, 226 GP2AP020A00F_FLAG_PROX_TRIGGER, 227 GP2AP020A00F_FLAG_PROX_RISING_EV, 228 GP2AP020A00F_FLAG_PROX_FALLING_EV, 229 GP2AP020A00F_FLAG_ALS_RISING_EV, 230 GP2AP020A00F_FLAG_ALS_FALLING_EV, 231 GP2AP020A00F_FLAG_LUX_MODE_HI, 232 GP2AP020A00F_FLAG_DATA_READY, 233}; 234 235enum gp2ap020a00f_thresh_val_id { 236 GP2AP020A00F_THRESH_TL, 237 GP2AP020A00F_THRESH_TH, 238 GP2AP020A00F_THRESH_PL, 239 GP2AP020A00F_THRESH_PH, 240}; 241 242struct gp2ap020a00f_data { 243 const struct gp2ap020a00f_platform_data *pdata; 244 struct i2c_client *client; 245 struct mutex lock; 246 char *buffer; 247 struct regulator *vled_reg; 248 unsigned long flags; 249 enum gp2ap020a00f_opmode cur_opmode; 250 struct iio_trigger *trig; 251 struct regmap *regmap; 252 unsigned int thresh_val[4]; 253 u8 debug_reg_addr; 254 struct irq_work work; 255 wait_queue_head_t data_ready_queue; 256}; 257 258static const u8 gp2ap020a00f_reg_init_tab[] = { 259 [GP2AP020A00F_OP_REG] = GP2AP020A00F_OP3_SHUTDOWN, 260 [GP2AP020A00F_ALS_REG] = GP2AP020A00F_RES_A_25ms | 261 GP2AP020A00F_RANGE_A_x8, 262 [GP2AP020A00F_PS_REG] = GP2AP020A00F_ALC_ON | 263 GP2AP020A00F_RES_P_1_56ms_x2 | 264 GP2AP020A00F_RANGE_P_x4, 265 [GP2AP020A00F_LED_REG] = GP2AP020A00F_INTVAL_0 | 266 GP2AP020A00F_IS_110mA | 267 GP2AP020A00F_FREQ_327_5kHz, 268 [GP2AP020A00F_TL_L_REG] = 0, 269 [GP2AP020A00F_TL_H_REG] = 0, 270 [GP2AP020A00F_TH_L_REG] = 0, 271 [GP2AP020A00F_TH_H_REG] = 0, 272 [GP2AP020A00F_PL_L_REG] = 0, 273 [GP2AP020A00F_PL_H_REG] = 0, 274 [GP2AP020A00F_PH_L_REG] = 0, 275 [GP2AP020A00F_PH_H_REG] = 0, 276}; 277 278static bool gp2ap020a00f_is_volatile_reg(struct device *dev, unsigned int reg) 279{ 280 switch (reg) { 281 case GP2AP020A00F_OP_REG: 282 case GP2AP020A00F_D0_L_REG: 283 case GP2AP020A00F_D0_H_REG: 284 case GP2AP020A00F_D1_L_REG: 285 case GP2AP020A00F_D1_H_REG: 286 case GP2AP020A00F_D2_L_REG: 287 case GP2AP020A00F_D2_H_REG: 288 return true; 289 default: 290 return false; 291 } 292} 293 294static const struct regmap_config gp2ap020a00f_regmap_config = { 295 .reg_bits = 8, 296 .val_bits = 8, 297 298 .max_register = GP2AP020A00F_D2_H_REG, 299 .cache_type = REGCACHE_RBTREE, 300 301 .volatile_reg = gp2ap020a00f_is_volatile_reg, 302}; 303 304static const struct gp2ap020a00f_mutable_config_regs { 305 u8 op_reg; 306 u8 als_reg; 307 u8 ps_reg; 308 u8 led_reg; 309} opmode_regs_settings[GP2AP020A00F_NUM_OPMODES] = { 310 [GP2AP020A00F_OPMODE_READ_RAW_CLEAR] = { 311 GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION 312 | GP2AP020A00F_OP3_OPERATION 313 | GP2AP020A00F_TYPE_AUTO_CALC, 314 GP2AP020A00F_PRST_ONCE, 315 GP2AP020A00F_INTTYPE_LEVEL, 316 GP2AP020A00F_PIN_ALS 317 }, 318 [GP2AP020A00F_OPMODE_READ_RAW_IR] = { 319 GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION 320 | GP2AP020A00F_OP3_OPERATION 321 | GP2AP020A00F_TYPE_MANUAL_CALC, 322 GP2AP020A00F_PRST_ONCE, 323 GP2AP020A00F_INTTYPE_LEVEL, 324 GP2AP020A00F_PIN_ALS 325 }, 326 [GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY] = { 327 GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION 328 | GP2AP020A00F_OP3_OPERATION 329 | GP2AP020A00F_TYPE_MANUAL_CALC, 330 GP2AP020A00F_PRST_ONCE, 331 GP2AP020A00F_INTTYPE_LEVEL, 332 GP2AP020A00F_PIN_PS 333 }, 334 [GP2AP020A00F_OPMODE_PROX_DETECT] = { 335 GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION 336 | GP2AP020A00F_OP3_OPERATION 337 | GP2AP020A00F_TYPE_MANUAL_CALC, 338 GP2AP020A00F_PRST_4_CYCLES, 339 GP2AP020A00F_INTTYPE_PULSE, 340 GP2AP020A00F_PIN_PS_DETECT 341 }, 342 [GP2AP020A00F_OPMODE_ALS] = { 343 GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION 344 | GP2AP020A00F_OP3_OPERATION 345 | GP2AP020A00F_TYPE_AUTO_CALC, 346 GP2AP020A00F_PRST_ONCE, 347 GP2AP020A00F_INTTYPE_LEVEL, 348 GP2AP020A00F_PIN_ALS 349 }, 350 [GP2AP020A00F_OPMODE_PS] = { 351 GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION 352 | GP2AP020A00F_OP3_OPERATION 353 | GP2AP020A00F_TYPE_MANUAL_CALC, 354 GP2AP020A00F_PRST_4_CYCLES, 355 GP2AP020A00F_INTTYPE_LEVEL, 356 GP2AP020A00F_PIN_PS 357 }, 358 [GP2AP020A00F_OPMODE_ALS_AND_PS] = { 359 GP2AP020A00F_OP_ALS_AND_PS 360 | GP2AP020A00F_OP2_CONT_OPERATION 361 | GP2AP020A00F_OP3_OPERATION 362 | GP2AP020A00F_TYPE_AUTO_CALC, 363 GP2AP020A00F_PRST_4_CYCLES, 364 GP2AP020A00F_INTTYPE_LEVEL, 365 GP2AP020A00F_PIN_ALS_OR_PS 366 }, 367 [GP2AP020A00F_OPMODE_SHUTDOWN] = { GP2AP020A00F_OP3_SHUTDOWN, }, 368}; 369 370static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data, 371 enum gp2ap020a00f_opmode op) 372{ 373 unsigned int op_reg_val; 374 int err; 375 376 if (op != GP2AP020A00F_OPMODE_SHUTDOWN) { 377 err = regmap_read(data->regmap, GP2AP020A00F_OP_REG, 378 &op_reg_val); 379 if (err < 0) 380 return err; 381 /* 382 * Shutdown the device if the operation being executed entails 383 * mode transition. 384 */ 385 if ((opmode_regs_settings[op].op_reg & GP2AP020A00F_OP_MASK) != 386 (op_reg_val & GP2AP020A00F_OP_MASK)) { 387 /* set shutdown mode */ 388 err = regmap_update_bits(data->regmap, 389 GP2AP020A00F_OP_REG, GP2AP020A00F_OP3_MASK, 390 GP2AP020A00F_OP3_SHUTDOWN); 391 if (err < 0) 392 return err; 393 } 394 395 err = regmap_update_bits(data->regmap, GP2AP020A00F_ALS_REG, 396 GP2AP020A00F_PRST_MASK, opmode_regs_settings[op] 397 .als_reg); 398 if (err < 0) 399 return err; 400 401 err = regmap_update_bits(data->regmap, GP2AP020A00F_PS_REG, 402 GP2AP020A00F_INTTYPE_MASK, opmode_regs_settings[op] 403 .ps_reg); 404 if (err < 0) 405 return err; 406 407 err = regmap_update_bits(data->regmap, GP2AP020A00F_LED_REG, 408 GP2AP020A00F_PIN_MASK, opmode_regs_settings[op] 409 .led_reg); 410 if (err < 0) 411 return err; 412 } 413 414 /* Set OP_REG and apply operation mode (power on / off) */ 415 err = regmap_update_bits(data->regmap, 416 GP2AP020A00F_OP_REG, 417 GP2AP020A00F_OP_MASK | GP2AP020A00F_OP2_MASK | 418 GP2AP020A00F_OP3_MASK | GP2AP020A00F_TYPE_MASK, 419 opmode_regs_settings[op].op_reg); 420 if (err < 0) 421 return err; 422 423 data->cur_opmode = op; 424 425 return 0; 426} 427 428static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data) 429{ 430 return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags) || 431 test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags) || 432 test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags) || 433 test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); 434} 435 436static bool gp2ap020a00f_prox_detect_enabled(struct gp2ap020a00f_data *data) 437{ 438 return test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags) || 439 test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); 440} 441 442static int gp2ap020a00f_write_event_threshold(struct gp2ap020a00f_data *data, 443 enum gp2ap020a00f_thresh_val_id th_val_id, 444 bool enable) 445{ 446 __le16 thresh_buf = 0; 447 unsigned int thresh_reg_val; 448 449 if (!enable) 450 thresh_reg_val = 0; 451 else if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags) && 452 th_val_id != GP2AP020A00F_THRESH_PL && 453 th_val_id != GP2AP020A00F_THRESH_PH) 454 /* 455 * For the high lux mode ALS threshold has to be scaled down 456 * to allow for proper comparison with the output value. 457 */ 458 thresh_reg_val = data->thresh_val[th_val_id] / 16; 459 else 460 thresh_reg_val = data->thresh_val[th_val_id] > 16000 ? 461 16000 : 462 data->thresh_val[th_val_id]; 463 464 thresh_buf = cpu_to_le16(thresh_reg_val); 465 466 return regmap_bulk_write(data->regmap, 467 GP2AP020A00F_THRESH_REG(th_val_id), 468 (u8 *)&thresh_buf, 2); 469} 470 471static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data, 472 enum gp2ap020a00f_opmode diff_mode, int add_sub) 473{ 474 enum gp2ap020a00f_opmode new_mode; 475 476 if (diff_mode != GP2AP020A00F_OPMODE_ALS && 477 diff_mode != GP2AP020A00F_OPMODE_PS) 478 return -EINVAL; 479 480 if (add_sub == GP2AP020A00F_ADD_MODE) { 481 if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN) 482 new_mode = diff_mode; 483 else 484 new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS; 485 } else { 486 if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS) 487 new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ? 488 GP2AP020A00F_OPMODE_PS : 489 GP2AP020A00F_OPMODE_ALS; 490 else 491 new_mode = GP2AP020A00F_OPMODE_SHUTDOWN; 492 } 493 494 return gp2ap020a00f_set_operation_mode(data, new_mode); 495} 496 497static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data, 498 enum gp2ap020a00f_cmd cmd) 499{ 500 int err = 0; 501 502 switch (cmd) { 503 case GP2AP020A00F_CMD_READ_RAW_CLEAR: 504 if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) 505 return -EBUSY; 506 err = gp2ap020a00f_set_operation_mode(data, 507 GP2AP020A00F_OPMODE_READ_RAW_CLEAR); 508 break; 509 case GP2AP020A00F_CMD_READ_RAW_IR: 510 if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) 511 return -EBUSY; 512 err = gp2ap020a00f_set_operation_mode(data, 513 GP2AP020A00F_OPMODE_READ_RAW_IR); 514 break; 515 case GP2AP020A00F_CMD_READ_RAW_PROXIMITY: 516 if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) 517 return -EBUSY; 518 err = gp2ap020a00f_set_operation_mode(data, 519 GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY); 520 break; 521 case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN: 522 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) 523 return -EBUSY; 524 if (!gp2ap020a00f_als_enabled(data)) 525 err = gp2ap020a00f_alter_opmode(data, 526 GP2AP020A00F_OPMODE_ALS, 527 GP2AP020A00F_ADD_MODE); 528 set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags); 529 break; 530 case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS: 531 clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags); 532 if (gp2ap020a00f_als_enabled(data)) 533 break; 534 err = gp2ap020a00f_alter_opmode(data, 535 GP2AP020A00F_OPMODE_ALS, 536 GP2AP020A00F_SUBTRACT_MODE); 537 break; 538 case GP2AP020A00F_CMD_TRIGGER_IR_EN: 539 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) 540 return -EBUSY; 541 if (!gp2ap020a00f_als_enabled(data)) 542 err = gp2ap020a00f_alter_opmode(data, 543 GP2AP020A00F_OPMODE_ALS, 544 GP2AP020A00F_ADD_MODE); 545 set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags); 546 break; 547 case GP2AP020A00F_CMD_TRIGGER_IR_DIS: 548 clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags); 549 if (gp2ap020a00f_als_enabled(data)) 550 break; 551 err = gp2ap020a00f_alter_opmode(data, 552 GP2AP020A00F_OPMODE_ALS, 553 GP2AP020A00F_SUBTRACT_MODE); 554 break; 555 case GP2AP020A00F_CMD_TRIGGER_PROX_EN: 556 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) 557 return -EBUSY; 558 err = gp2ap020a00f_alter_opmode(data, 559 GP2AP020A00F_OPMODE_PS, 560 GP2AP020A00F_ADD_MODE); 561 set_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags); 562 break; 563 case GP2AP020A00F_CMD_TRIGGER_PROX_DIS: 564 clear_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags); 565 err = gp2ap020a00f_alter_opmode(data, 566 GP2AP020A00F_OPMODE_PS, 567 GP2AP020A00F_SUBTRACT_MODE); 568 break; 569 case GP2AP020A00F_CMD_ALS_HIGH_EV_EN: 570 if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) 571 return 0; 572 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) 573 return -EBUSY; 574 if (!gp2ap020a00f_als_enabled(data)) { 575 err = gp2ap020a00f_alter_opmode(data, 576 GP2AP020A00F_OPMODE_ALS, 577 GP2AP020A00F_ADD_MODE); 578 if (err < 0) 579 return err; 580 } 581 set_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags); 582 err = gp2ap020a00f_write_event_threshold(data, 583 GP2AP020A00F_THRESH_TH, true); 584 break; 585 case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS: 586 if (!test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) 587 return 0; 588 clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags); 589 if (!gp2ap020a00f_als_enabled(data)) { 590 err = gp2ap020a00f_alter_opmode(data, 591 GP2AP020A00F_OPMODE_ALS, 592 GP2AP020A00F_SUBTRACT_MODE); 593 if (err < 0) 594 return err; 595 } 596 err = gp2ap020a00f_write_event_threshold(data, 597 GP2AP020A00F_THRESH_TH, false); 598 break; 599 case GP2AP020A00F_CMD_ALS_LOW_EV_EN: 600 if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) 601 return 0; 602 if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) 603 return -EBUSY; 604 if (!gp2ap020a00f_als_enabled(data)) { 605 err = gp2ap020a00f_alter_opmode(data, 606 GP2AP020A00F_OPMODE_ALS, 607 GP2AP020A00F_ADD_MODE); 608 if (err < 0) 609 return err; 610 } 611 set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); 612 err = gp2ap020a00f_write_event_threshold(data, 613 GP2AP020A00F_THRESH_TL, true); 614 break; 615 case GP2AP020A00F_CMD_ALS_LOW_EV_DIS: 616 if (!test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) 617 return 0; 618 clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); 619 if (!gp2ap020a00f_als_enabled(data)) { 620 err = gp2ap020a00f_alter_opmode(data, 621 GP2AP020A00F_OPMODE_ALS, 622 GP2AP020A00F_SUBTRACT_MODE); 623 if (err < 0) 624 return err; 625 } 626 err = gp2ap020a00f_write_event_threshold(data, 627 GP2AP020A00F_THRESH_TL, false); 628 break; 629 case GP2AP020A00F_CMD_PROX_HIGH_EV_EN: 630 if (test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags)) 631 return 0; 632 if (gp2ap020a00f_als_enabled(data) || 633 data->cur_opmode == GP2AP020A00F_OPMODE_PS) 634 return -EBUSY; 635 if (!gp2ap020a00f_prox_detect_enabled(data)) { 636 err = gp2ap020a00f_set_operation_mode(data, 637 GP2AP020A00F_OPMODE_PROX_DETECT); 638 if (err < 0) 639 return err; 640 } 641 set_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags); 642 err = gp2ap020a00f_write_event_threshold(data, 643 GP2AP020A00F_THRESH_PH, true); 644 break; 645 case GP2AP020A00F_CMD_PROX_HIGH_EV_DIS: 646 if (!test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags)) 647 return 0; 648 clear_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags); 649 err = gp2ap020a00f_set_operation_mode(data, 650 GP2AP020A00F_OPMODE_SHUTDOWN); 651 if (err < 0) 652 return err; 653 err = gp2ap020a00f_write_event_threshold(data, 654 GP2AP020A00F_THRESH_PH, false); 655 break; 656 case GP2AP020A00F_CMD_PROX_LOW_EV_EN: 657 if (test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags)) 658 return 0; 659 if (gp2ap020a00f_als_enabled(data) || 660 data->cur_opmode == GP2AP020A00F_OPMODE_PS) 661 return -EBUSY; 662 if (!gp2ap020a00f_prox_detect_enabled(data)) { 663 err = gp2ap020a00f_set_operation_mode(data, 664 GP2AP020A00F_OPMODE_PROX_DETECT); 665 if (err < 0) 666 return err; 667 } 668 set_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); 669 err = gp2ap020a00f_write_event_threshold(data, 670 GP2AP020A00F_THRESH_PL, true); 671 break; 672 case GP2AP020A00F_CMD_PROX_LOW_EV_DIS: 673 if (!test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags)) 674 return 0; 675 clear_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); 676 err = gp2ap020a00f_set_operation_mode(data, 677 GP2AP020A00F_OPMODE_SHUTDOWN); 678 if (err < 0) 679 return err; 680 err = gp2ap020a00f_write_event_threshold(data, 681 GP2AP020A00F_THRESH_PL, false); 682 break; 683 } 684 685 return err; 686} 687 688static int wait_conversion_complete_irq(struct gp2ap020a00f_data *data) 689{ 690 int ret; 691 692 ret = wait_event_timeout(data->data_ready_queue, 693 test_bit(GP2AP020A00F_FLAG_DATA_READY, 694 &data->flags), 695 GP2AP020A00F_DATA_READY_TIMEOUT); 696 clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags); 697 698 return ret > 0 ? 0 : -ETIME; 699} 700 701static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data, 702 unsigned int output_reg, int *val) 703{ 704 u8 reg_buf[2]; 705 int err; 706 707 err = wait_conversion_complete_irq(data); 708 if (err < 0) 709 dev_dbg(&data->client->dev, "data ready timeout\n"); 710 711 err = regmap_bulk_read(data->regmap, output_reg, reg_buf, 2); 712 if (err < 0) 713 return err; 714 715 *val = le16_to_cpup((__le16 *)reg_buf); 716 717 return err; 718} 719 720static bool gp2ap020a00f_adjust_lux_mode(struct gp2ap020a00f_data *data, 721 int output_val) 722{ 723 u8 new_range = 0xff; 724 int err; 725 726 if (!test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) { 727 if (output_val > 16000) { 728 set_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags); 729 new_range = GP2AP020A00F_RANGE_A_x128; 730 } 731 } else { 732 if (output_val < 1000) { 733 clear_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags); 734 new_range = GP2AP020A00F_RANGE_A_x8; 735 } 736 } 737 738 if (new_range != 0xff) { 739 /* Clear als threshold registers to avoid spurious 740 * events caused by lux mode transition. 741 */ 742 err = gp2ap020a00f_write_event_threshold(data, 743 GP2AP020A00F_THRESH_TH, false); 744 if (err < 0) { 745 dev_err(&data->client->dev, 746 "Clearing als threshold register failed.\n"); 747 return false; 748 } 749 750 err = gp2ap020a00f_write_event_threshold(data, 751 GP2AP020A00F_THRESH_TL, false); 752 if (err < 0) { 753 dev_err(&data->client->dev, 754 "Clearing als threshold register failed.\n"); 755 return false; 756 } 757 758 /* Change lux mode */ 759 err = regmap_update_bits(data->regmap, 760 GP2AP020A00F_OP_REG, 761 GP2AP020A00F_OP3_MASK, 762 GP2AP020A00F_OP3_SHUTDOWN); 763 764 if (err < 0) { 765 dev_err(&data->client->dev, 766 "Shutting down the device failed.\n"); 767 return false; 768 } 769 770 err = regmap_update_bits(data->regmap, 771 GP2AP020A00F_ALS_REG, 772 GP2AP020A00F_RANGE_A_MASK, 773 new_range); 774 775 if (err < 0) { 776 dev_err(&data->client->dev, 777 "Adjusting device lux mode failed.\n"); 778 return false; 779 } 780 781 err = regmap_update_bits(data->regmap, 782 GP2AP020A00F_OP_REG, 783 GP2AP020A00F_OP3_MASK, 784 GP2AP020A00F_OP3_OPERATION); 785 786 if (err < 0) { 787 dev_err(&data->client->dev, 788 "Powering up the device failed.\n"); 789 return false; 790 } 791 792 /* Adjust als threshold register values to the new lux mode */ 793 if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) { 794 err = gp2ap020a00f_write_event_threshold(data, 795 GP2AP020A00F_THRESH_TH, true); 796 if (err < 0) { 797 dev_err(&data->client->dev, 798 "Adjusting als threshold value failed.\n"); 799 return false; 800 } 801 } 802 803 if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) { 804 err = gp2ap020a00f_write_event_threshold(data, 805 GP2AP020A00F_THRESH_TL, true); 806 if (err < 0) { 807 dev_err(&data->client->dev, 808 "Adjusting als threshold value failed.\n"); 809 return false; 810 } 811 } 812 813 return true; 814 } 815 816 return false; 817} 818 819static void gp2ap020a00f_output_to_lux(struct gp2ap020a00f_data *data, 820 int *output_val) 821{ 822 if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) 823 *output_val *= 16; 824} 825 826static void gp2ap020a00f_iio_trigger_work(struct irq_work *work) 827{ 828 struct gp2ap020a00f_data *data = 829 container_of(work, struct gp2ap020a00f_data, work); 830 831 iio_trigger_poll(data->trig); 832} 833 834static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data) 835{ 836 struct iio_dev *indio_dev = data; 837 struct gp2ap020a00f_data *priv = iio_priv(indio_dev); 838 unsigned int op_reg_val; 839 int ret; 840 841 /* Read interrupt flags */ 842 ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, &op_reg_val); 843 if (ret < 0) 844 return IRQ_HANDLED; 845 846 if (gp2ap020a00f_prox_detect_enabled(priv)) { 847 if (op_reg_val & GP2AP020A00F_PROX_DETECT) { 848 iio_push_event(indio_dev, 849 IIO_UNMOD_EVENT_CODE( 850 IIO_PROXIMITY, 851 GP2AP020A00F_SCAN_MODE_PROXIMITY, 852 IIO_EV_TYPE_ROC, 853 IIO_EV_DIR_RISING), 854 iio_get_time_ns()); 855 } else { 856 iio_push_event(indio_dev, 857 IIO_UNMOD_EVENT_CODE( 858 IIO_PROXIMITY, 859 GP2AP020A00F_SCAN_MODE_PROXIMITY, 860 IIO_EV_TYPE_ROC, 861 IIO_EV_DIR_FALLING), 862 iio_get_time_ns()); 863 } 864 } 865 866 return IRQ_HANDLED; 867} 868 869static irqreturn_t gp2ap020a00f_thresh_event_handler(int irq, void *data) 870{ 871 struct iio_dev *indio_dev = data; 872 struct gp2ap020a00f_data *priv = iio_priv(indio_dev); 873 u8 op_reg_flags, d0_reg_buf[2]; 874 unsigned int output_val, op_reg_val; 875 int thresh_val_id, ret; 876 877 /* Read interrupt flags */ 878 ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, 879 &op_reg_val); 880 if (ret < 0) 881 goto done; 882 883 op_reg_flags = op_reg_val & (GP2AP020A00F_FLAG_A | GP2AP020A00F_FLAG_P 884 | GP2AP020A00F_PROX_DETECT); 885 886 op_reg_val &= (~GP2AP020A00F_FLAG_A & ~GP2AP020A00F_FLAG_P 887 & ~GP2AP020A00F_PROX_DETECT); 888 889 /* Clear interrupt flags (if not in INTTYPE_PULSE mode) */ 890 if (priv->cur_opmode != GP2AP020A00F_OPMODE_PROX_DETECT) { 891 ret = regmap_write(priv->regmap, GP2AP020A00F_OP_REG, 892 op_reg_val); 893 if (ret < 0) 894 goto done; 895 } 896 897 if (op_reg_flags & GP2AP020A00F_FLAG_A) { 898 /* Check D0 register to assess if the lux mode 899 * transition is required. 900 */ 901 ret = regmap_bulk_read(priv->regmap, GP2AP020A00F_D0_L_REG, 902 d0_reg_buf, 2); 903 if (ret < 0) 904 goto done; 905 906 output_val = le16_to_cpup((__le16 *)d0_reg_buf); 907 908 if (gp2ap020a00f_adjust_lux_mode(priv, output_val)) 909 goto done; 910 911 gp2ap020a00f_output_to_lux(priv, &output_val); 912 913 /* 914 * We need to check output value to distinguish 915 * between high and low ambient light threshold event. 916 */ 917 if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &priv->flags)) { 918 thresh_val_id = 919 GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TH_L_REG); 920 if (output_val > priv->thresh_val[thresh_val_id]) 921 iio_push_event(indio_dev, 922 IIO_MOD_EVENT_CODE( 923 IIO_LIGHT, 924 GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, 925 IIO_MOD_LIGHT_CLEAR, 926 IIO_EV_TYPE_THRESH, 927 IIO_EV_DIR_RISING), 928 iio_get_time_ns()); 929 } 930 931 if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &priv->flags)) { 932 thresh_val_id = 933 GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TL_L_REG); 934 if (output_val < priv->thresh_val[thresh_val_id]) 935 iio_push_event(indio_dev, 936 IIO_MOD_EVENT_CODE( 937 IIO_LIGHT, 938 GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, 939 IIO_MOD_LIGHT_CLEAR, 940 IIO_EV_TYPE_THRESH, 941 IIO_EV_DIR_FALLING), 942 iio_get_time_ns()); 943 } 944 } 945 946 if (priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR || 947 priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR || 948 priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) { 949 set_bit(GP2AP020A00F_FLAG_DATA_READY, &priv->flags); 950 wake_up(&priv->data_ready_queue); 951 goto done; 952 } 953 954 if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &priv->flags) || 955 test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &priv->flags) || 956 test_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &priv->flags)) 957 /* This fires off the trigger. */ 958 irq_work_queue(&priv->work); 959 960done: 961 return IRQ_HANDLED; 962} 963 964static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data) 965{ 966 struct iio_poll_func *pf = data; 967 struct iio_dev *indio_dev = pf->indio_dev; 968 struct gp2ap020a00f_data *priv = iio_priv(indio_dev); 969 size_t d_size = 0; 970 int i, out_val, ret; 971 972 for_each_set_bit(i, indio_dev->active_scan_mask, 973 indio_dev->masklength) { 974 ret = regmap_bulk_read(priv->regmap, 975 GP2AP020A00F_DATA_REG(i), 976 &priv->buffer[d_size], 2); 977 if (ret < 0) 978 goto done; 979 980 if (i == GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR || 981 i == GP2AP020A00F_SCAN_MODE_LIGHT_IR) { 982 out_val = le16_to_cpup((__le16 *)&priv->buffer[d_size]); 983 gp2ap020a00f_output_to_lux(priv, &out_val); 984 985 put_unaligned_le32(out_val, &priv->buffer[d_size]); 986 d_size += 4; 987 } else { 988 d_size += 2; 989 } 990 } 991 992 iio_push_to_buffers_with_timestamp(indio_dev, priv->buffer, 993 pf->timestamp); 994done: 995 iio_trigger_notify_done(indio_dev->trig); 996 997 return IRQ_HANDLED; 998} 999 1000static u8 gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan, 1001 enum iio_event_direction event_dir) 1002{ 1003 switch (chan->type) { 1004 case IIO_PROXIMITY: 1005 if (event_dir == IIO_EV_DIR_RISING) 1006 return GP2AP020A00F_PH_L_REG; 1007 else 1008 return GP2AP020A00F_PL_L_REG; 1009 case IIO_LIGHT: 1010 if (event_dir == IIO_EV_DIR_RISING) 1011 return GP2AP020A00F_TH_L_REG; 1012 else 1013 return GP2AP020A00F_TL_L_REG; 1014 default: 1015 break; 1016 } 1017 1018 return -EINVAL; 1019} 1020 1021static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev, 1022 const struct iio_chan_spec *chan, 1023 enum iio_event_type type, 1024 enum iio_event_direction dir, 1025 enum iio_event_info info, 1026 int val, int val2) 1027{ 1028 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1029 bool event_en = false; 1030 u8 thresh_val_id; 1031 u8 thresh_reg_l; 1032 int err = 0; 1033 1034 mutex_lock(&data->lock); 1035 1036 thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir); 1037 thresh_val_id = GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l); 1038 1039 if (thresh_val_id > GP2AP020A00F_THRESH_PH) { 1040 err = -EINVAL; 1041 goto error_unlock; 1042 } 1043 1044 switch (thresh_reg_l) { 1045 case GP2AP020A00F_TH_L_REG: 1046 event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, 1047 &data->flags); 1048 break; 1049 case GP2AP020A00F_TL_L_REG: 1050 event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, 1051 &data->flags); 1052 break; 1053 case GP2AP020A00F_PH_L_REG: 1054 if (val == 0) { 1055 err = -EINVAL; 1056 goto error_unlock; 1057 } 1058 event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, 1059 &data->flags); 1060 break; 1061 case GP2AP020A00F_PL_L_REG: 1062 if (val == 0) { 1063 err = -EINVAL; 1064 goto error_unlock; 1065 } 1066 event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, 1067 &data->flags); 1068 break; 1069 } 1070 1071 data->thresh_val[thresh_val_id] = val; 1072 err = gp2ap020a00f_write_event_threshold(data, thresh_val_id, 1073 event_en); 1074error_unlock: 1075 mutex_unlock(&data->lock); 1076 1077 return err; 1078} 1079 1080static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev, 1081 const struct iio_chan_spec *chan, 1082 enum iio_event_type type, 1083 enum iio_event_direction dir, 1084 enum iio_event_info info, 1085 int *val, int *val2) 1086{ 1087 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1088 u8 thresh_reg_l; 1089 int err = IIO_VAL_INT; 1090 1091 mutex_lock(&data->lock); 1092 1093 thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir); 1094 1095 if (thresh_reg_l > GP2AP020A00F_PH_L_REG) { 1096 err = -EINVAL; 1097 goto error_unlock; 1098 } 1099 1100 *val = data->thresh_val[GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l)]; 1101 1102error_unlock: 1103 mutex_unlock(&data->lock); 1104 1105 return err; 1106} 1107 1108static int gp2ap020a00f_write_prox_event_config(struct iio_dev *indio_dev, 1109 int state) 1110{ 1111 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1112 enum gp2ap020a00f_cmd cmd_high_ev, cmd_low_ev; 1113 int err; 1114 1115 cmd_high_ev = state ? GP2AP020A00F_CMD_PROX_HIGH_EV_EN : 1116 GP2AP020A00F_CMD_PROX_HIGH_EV_DIS; 1117 cmd_low_ev = state ? GP2AP020A00F_CMD_PROX_LOW_EV_EN : 1118 GP2AP020A00F_CMD_PROX_LOW_EV_DIS; 1119 1120 /* 1121 * In order to enable proximity detection feature in the device 1122 * both high and low threshold registers have to be written 1123 * with different values, greater than zero. 1124 */ 1125 if (state) { 1126 if (data->thresh_val[GP2AP020A00F_THRESH_PL] == 0) 1127 return -EINVAL; 1128 1129 if (data->thresh_val[GP2AP020A00F_THRESH_PH] == 0) 1130 return -EINVAL; 1131 } 1132 1133 err = gp2ap020a00f_exec_cmd(data, cmd_high_ev); 1134 if (err < 0) 1135 return err; 1136 1137 err = gp2ap020a00f_exec_cmd(data, cmd_low_ev); 1138 if (err < 0) 1139 return err; 1140 1141 free_irq(data->client->irq, indio_dev); 1142 1143 if (state) 1144 err = request_threaded_irq(data->client->irq, NULL, 1145 &gp2ap020a00f_prox_sensing_handler, 1146 IRQF_TRIGGER_RISING | 1147 IRQF_TRIGGER_FALLING | 1148 IRQF_ONESHOT, 1149 "gp2ap020a00f_prox_sensing", 1150 indio_dev); 1151 else { 1152 err = request_threaded_irq(data->client->irq, NULL, 1153 &gp2ap020a00f_thresh_event_handler, 1154 IRQF_TRIGGER_FALLING | 1155 IRQF_ONESHOT, 1156 "gp2ap020a00f_thresh_event", 1157 indio_dev); 1158 } 1159 1160 return err; 1161} 1162 1163static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev, 1164 const struct iio_chan_spec *chan, 1165 enum iio_event_type type, 1166 enum iio_event_direction dir, 1167 int state) 1168{ 1169 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1170 enum gp2ap020a00f_cmd cmd; 1171 int err; 1172 1173 mutex_lock(&data->lock); 1174 1175 switch (chan->type) { 1176 case IIO_PROXIMITY: 1177 err = gp2ap020a00f_write_prox_event_config(indio_dev, state); 1178 break; 1179 case IIO_LIGHT: 1180 if (dir == IIO_EV_DIR_RISING) { 1181 cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN : 1182 GP2AP020A00F_CMD_ALS_HIGH_EV_DIS; 1183 err = gp2ap020a00f_exec_cmd(data, cmd); 1184 } else { 1185 cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN : 1186 GP2AP020A00F_CMD_ALS_LOW_EV_DIS; 1187 err = gp2ap020a00f_exec_cmd(data, cmd); 1188 } 1189 break; 1190 default: 1191 err = -EINVAL; 1192 } 1193 1194 mutex_unlock(&data->lock); 1195 1196 return err; 1197} 1198 1199static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev, 1200 const struct iio_chan_spec *chan, 1201 enum iio_event_type type, 1202 enum iio_event_direction dir) 1203{ 1204 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1205 int event_en = 0; 1206 1207 mutex_lock(&data->lock); 1208 1209 switch (chan->type) { 1210 case IIO_PROXIMITY: 1211 if (dir == IIO_EV_DIR_RISING) 1212 event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, 1213 &data->flags); 1214 else 1215 event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, 1216 &data->flags); 1217 break; 1218 case IIO_LIGHT: 1219 if (dir == IIO_EV_DIR_RISING) 1220 event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, 1221 &data->flags); 1222 else 1223 event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, 1224 &data->flags); 1225 break; 1226 default: 1227 event_en = -EINVAL; 1228 break; 1229 } 1230 1231 mutex_unlock(&data->lock); 1232 1233 return event_en; 1234} 1235 1236static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data, 1237 struct iio_chan_spec const *chan, int *val) 1238{ 1239 enum gp2ap020a00f_cmd cmd; 1240 int err; 1241 1242 switch (chan->scan_index) { 1243 case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: 1244 cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR; 1245 break; 1246 case GP2AP020A00F_SCAN_MODE_LIGHT_IR: 1247 cmd = GP2AP020A00F_CMD_READ_RAW_IR; 1248 break; 1249 case GP2AP020A00F_SCAN_MODE_PROXIMITY: 1250 cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY; 1251 break; 1252 default: 1253 return -EINVAL; 1254 } 1255 1256 err = gp2ap020a00f_exec_cmd(data, cmd); 1257 if (err < 0) { 1258 dev_err(&data->client->dev, 1259 "gp2ap020a00f_exec_cmd failed\n"); 1260 goto error_ret; 1261 } 1262 1263 err = gp2ap020a00f_read_output(data, chan->address, val); 1264 if (err < 0) 1265 dev_err(&data->client->dev, 1266 "gp2ap020a00f_read_output failed\n"); 1267 1268 err = gp2ap020a00f_set_operation_mode(data, 1269 GP2AP020A00F_OPMODE_SHUTDOWN); 1270 if (err < 0) 1271 dev_err(&data->client->dev, 1272 "Failed to shut down the device.\n"); 1273 1274 if (cmd == GP2AP020A00F_CMD_READ_RAW_CLEAR || 1275 cmd == GP2AP020A00F_CMD_READ_RAW_IR) 1276 gp2ap020a00f_output_to_lux(data, val); 1277 1278error_ret: 1279 return err; 1280} 1281 1282static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev, 1283 struct iio_chan_spec const *chan, 1284 int *val, int *val2, 1285 long mask) 1286{ 1287 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1288 int err = -EINVAL; 1289 1290 mutex_lock(&data->lock); 1291 1292 switch (mask) { 1293 case IIO_CHAN_INFO_RAW: 1294 if (iio_buffer_enabled(indio_dev)) { 1295 err = -EBUSY; 1296 goto error_unlock; 1297 } 1298 1299 err = gp2ap020a00f_read_channel(data, chan, val); 1300 break; 1301 } 1302 1303error_unlock: 1304 mutex_unlock(&data->lock); 1305 1306 return err < 0 ? err : IIO_VAL_INT; 1307} 1308 1309static const struct iio_event_spec gp2ap020a00f_event_spec_light[] = { 1310 { 1311 .type = IIO_EV_TYPE_THRESH, 1312 .dir = IIO_EV_DIR_RISING, 1313 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 1314 BIT(IIO_EV_INFO_ENABLE), 1315 }, { 1316 .type = IIO_EV_TYPE_THRESH, 1317 .dir = IIO_EV_DIR_FALLING, 1318 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 1319 BIT(IIO_EV_INFO_ENABLE), 1320 }, 1321}; 1322 1323static const struct iio_event_spec gp2ap020a00f_event_spec_prox[] = { 1324 { 1325 .type = IIO_EV_TYPE_ROC, 1326 .dir = IIO_EV_DIR_RISING, 1327 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 1328 BIT(IIO_EV_INFO_ENABLE), 1329 }, { 1330 .type = IIO_EV_TYPE_ROC, 1331 .dir = IIO_EV_DIR_FALLING, 1332 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 1333 BIT(IIO_EV_INFO_ENABLE), 1334 }, 1335}; 1336 1337static const struct iio_chan_spec gp2ap020a00f_channels[] = { 1338 { 1339 .type = IIO_LIGHT, 1340 .channel2 = IIO_MOD_LIGHT_CLEAR, 1341 .modified = 1, 1342 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1343 .scan_type = { 1344 .sign = 'u', 1345 .realbits = 24, 1346 .shift = 0, 1347 .storagebits = 32, 1348 .endianness = IIO_LE, 1349 }, 1350 .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, 1351 .address = GP2AP020A00F_D0_L_REG, 1352 .event_spec = gp2ap020a00f_event_spec_light, 1353 .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_light), 1354 }, 1355 { 1356 .type = IIO_LIGHT, 1357 .channel2 = IIO_MOD_LIGHT_IR, 1358 .modified = 1, 1359 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1360 .scan_type = { 1361 .sign = 'u', 1362 .realbits = 24, 1363 .shift = 0, 1364 .storagebits = 32, 1365 .endianness = IIO_LE, 1366 }, 1367 .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR, 1368 .address = GP2AP020A00F_D1_L_REG, 1369 }, 1370 { 1371 .type = IIO_PROXIMITY, 1372 .modified = 0, 1373 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1374 .scan_type = { 1375 .sign = 'u', 1376 .realbits = 16, 1377 .shift = 0, 1378 .storagebits = 16, 1379 .endianness = IIO_LE, 1380 }, 1381 .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY, 1382 .address = GP2AP020A00F_D2_L_REG, 1383 .event_spec = gp2ap020a00f_event_spec_prox, 1384 .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_prox), 1385 }, 1386 IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP), 1387}; 1388 1389static const struct iio_info gp2ap020a00f_info = { 1390 .read_raw = &gp2ap020a00f_read_raw, 1391 .read_event_value = &gp2ap020a00f_read_event_val, 1392 .read_event_config = &gp2ap020a00f_read_event_config, 1393 .write_event_value = &gp2ap020a00f_write_event_val, 1394 .write_event_config = &gp2ap020a00f_write_event_config, 1395 .driver_module = THIS_MODULE, 1396}; 1397 1398static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev) 1399{ 1400 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1401 int i, err = 0; 1402 1403 mutex_lock(&data->lock); 1404 1405 /* 1406 * Enable triggers according to the scan_mask. Enabling either 1407 * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS 1408 * module in the device, which generates samples in both D0 (clear) 1409 * and D1 (ir) registers. As the two registers are bound to the 1410 * two separate IIO channels they are treated in the driver logic 1411 * as if they were controlled independently. 1412 */ 1413 for_each_set_bit(i, indio_dev->active_scan_mask, 1414 indio_dev->masklength) { 1415 switch (i) { 1416 case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: 1417 err = gp2ap020a00f_exec_cmd(data, 1418 GP2AP020A00F_CMD_TRIGGER_CLEAR_EN); 1419 break; 1420 case GP2AP020A00F_SCAN_MODE_LIGHT_IR: 1421 err = gp2ap020a00f_exec_cmd(data, 1422 GP2AP020A00F_CMD_TRIGGER_IR_EN); 1423 break; 1424 case GP2AP020A00F_SCAN_MODE_PROXIMITY: 1425 err = gp2ap020a00f_exec_cmd(data, 1426 GP2AP020A00F_CMD_TRIGGER_PROX_EN); 1427 break; 1428 } 1429 } 1430 1431 if (err < 0) 1432 goto error_unlock; 1433 1434 data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); 1435 if (!data->buffer) { 1436 err = -ENOMEM; 1437 goto error_unlock; 1438 } 1439 1440 err = iio_triggered_buffer_postenable(indio_dev); 1441 1442error_unlock: 1443 mutex_unlock(&data->lock); 1444 1445 return err; 1446} 1447 1448static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev) 1449{ 1450 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1451 int i, err; 1452 1453 mutex_lock(&data->lock); 1454 1455 err = iio_triggered_buffer_predisable(indio_dev); 1456 if (err < 0) 1457 goto error_unlock; 1458 1459 for_each_set_bit(i, indio_dev->active_scan_mask, 1460 indio_dev->masklength) { 1461 switch (i) { 1462 case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: 1463 err = gp2ap020a00f_exec_cmd(data, 1464 GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS); 1465 break; 1466 case GP2AP020A00F_SCAN_MODE_LIGHT_IR: 1467 err = gp2ap020a00f_exec_cmd(data, 1468 GP2AP020A00F_CMD_TRIGGER_IR_DIS); 1469 break; 1470 case GP2AP020A00F_SCAN_MODE_PROXIMITY: 1471 err = gp2ap020a00f_exec_cmd(data, 1472 GP2AP020A00F_CMD_TRIGGER_PROX_DIS); 1473 break; 1474 } 1475 } 1476 1477 if (err == 0) 1478 kfree(data->buffer); 1479 1480error_unlock: 1481 mutex_unlock(&data->lock); 1482 1483 return err; 1484} 1485 1486static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = { 1487 .postenable = &gp2ap020a00f_buffer_postenable, 1488 .predisable = &gp2ap020a00f_buffer_predisable, 1489}; 1490 1491static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = { 1492 .owner = THIS_MODULE, 1493}; 1494 1495static int gp2ap020a00f_probe(struct i2c_client *client, 1496 const struct i2c_device_id *id) 1497{ 1498 struct gp2ap020a00f_data *data; 1499 struct iio_dev *indio_dev; 1500 struct regmap *regmap; 1501 int err; 1502 1503 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 1504 if (!indio_dev) 1505 return -ENOMEM; 1506 1507 data = iio_priv(indio_dev); 1508 1509 data->vled_reg = devm_regulator_get(&client->dev, "vled"); 1510 if (IS_ERR(data->vled_reg)) 1511 return PTR_ERR(data->vled_reg); 1512 1513 err = regulator_enable(data->vled_reg); 1514 if (err) 1515 return err; 1516 1517 regmap = devm_regmap_init_i2c(client, &gp2ap020a00f_regmap_config); 1518 if (IS_ERR(regmap)) { 1519 dev_err(&client->dev, "Regmap initialization failed.\n"); 1520 err = PTR_ERR(regmap); 1521 goto error_regulator_disable; 1522 } 1523 1524 /* Initialize device registers */ 1525 err = regmap_bulk_write(regmap, GP2AP020A00F_OP_REG, 1526 gp2ap020a00f_reg_init_tab, 1527 ARRAY_SIZE(gp2ap020a00f_reg_init_tab)); 1528 1529 if (err < 0) { 1530 dev_err(&client->dev, "Device initialization failed.\n"); 1531 goto error_regulator_disable; 1532 } 1533 1534 i2c_set_clientdata(client, indio_dev); 1535 1536 data->client = client; 1537 data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN; 1538 data->regmap = regmap; 1539 init_waitqueue_head(&data->data_ready_queue); 1540 1541 mutex_init(&data->lock); 1542 indio_dev->dev.parent = &client->dev; 1543 indio_dev->channels = gp2ap020a00f_channels; 1544 indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels); 1545 indio_dev->info = &gp2ap020a00f_info; 1546 indio_dev->name = id->name; 1547 indio_dev->modes = INDIO_DIRECT_MODE; 1548 1549 /* Allocate buffer */ 1550 err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, 1551 &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops); 1552 if (err < 0) 1553 goto error_regulator_disable; 1554 1555 /* Allocate trigger */ 1556 data->trig = devm_iio_trigger_alloc(&client->dev, "%s-trigger", 1557 indio_dev->name); 1558 if (data->trig == NULL) { 1559 err = -ENOMEM; 1560 dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n"); 1561 goto error_uninit_buffer; 1562 } 1563 1564 /* This needs to be requested here for read_raw calls to work. */ 1565 err = request_threaded_irq(client->irq, NULL, 1566 &gp2ap020a00f_thresh_event_handler, 1567 IRQF_TRIGGER_FALLING | 1568 IRQF_ONESHOT, 1569 "gp2ap020a00f_als_event", 1570 indio_dev); 1571 if (err < 0) { 1572 dev_err(&client->dev, "Irq request failed.\n"); 1573 goto error_uninit_buffer; 1574 } 1575 1576 data->trig->ops = &gp2ap020a00f_trigger_ops; 1577 data->trig->dev.parent = &data->client->dev; 1578 1579 init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work); 1580 1581 err = iio_trigger_register(data->trig); 1582 if (err < 0) { 1583 dev_err(&client->dev, "Failed to register iio trigger.\n"); 1584 goto error_free_irq; 1585 } 1586 1587 err = iio_device_register(indio_dev); 1588 if (err < 0) 1589 goto error_trigger_unregister; 1590 1591 return 0; 1592 1593error_trigger_unregister: 1594 iio_trigger_unregister(data->trig); 1595error_free_irq: 1596 free_irq(client->irq, indio_dev); 1597error_uninit_buffer: 1598 iio_triggered_buffer_cleanup(indio_dev); 1599error_regulator_disable: 1600 regulator_disable(data->vled_reg); 1601 1602 return err; 1603} 1604 1605static int gp2ap020a00f_remove(struct i2c_client *client) 1606{ 1607 struct iio_dev *indio_dev = i2c_get_clientdata(client); 1608 struct gp2ap020a00f_data *data = iio_priv(indio_dev); 1609 int err; 1610 1611 err = gp2ap020a00f_set_operation_mode(data, 1612 GP2AP020A00F_OPMODE_SHUTDOWN); 1613 if (err < 0) 1614 dev_err(&indio_dev->dev, "Failed to power off the device.\n"); 1615 1616 iio_device_unregister(indio_dev); 1617 iio_trigger_unregister(data->trig); 1618 free_irq(client->irq, indio_dev); 1619 iio_triggered_buffer_cleanup(indio_dev); 1620 regulator_disable(data->vled_reg); 1621 1622 return 0; 1623} 1624 1625static const struct i2c_device_id gp2ap020a00f_id[] = { 1626 { GP2A_I2C_NAME, 0 }, 1627 { } 1628}; 1629 1630MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id); 1631 1632#ifdef CONFIG_OF 1633static const struct of_device_id gp2ap020a00f_of_match[] = { 1634 { .compatible = "sharp,gp2ap020a00f" }, 1635 { } 1636}; 1637#endif 1638 1639static struct i2c_driver gp2ap020a00f_driver = { 1640 .driver = { 1641 .name = GP2A_I2C_NAME, 1642 .of_match_table = of_match_ptr(gp2ap020a00f_of_match), 1643 .owner = THIS_MODULE, 1644 }, 1645 .probe = gp2ap020a00f_probe, 1646 .remove = gp2ap020a00f_remove, 1647 .id_table = gp2ap020a00f_id, 1648}; 1649 1650module_i2c_driver(gp2ap020a00f_driver); 1651 1652MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>"); 1653MODULE_DESCRIPTION("Sharp GP2AP020A00F Proximity/ALS sensor driver"); 1654MODULE_LICENSE("GPL v2"); 1655