Jacek Anaszewski | bf29fbe | 2013-09-09 16:23:00 +0100 | [diff] [blame^] | 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 | * - illiminance_clear [lux] |
| 9 | * - illiminance_ir |
| 10 | * - proximity |
| 11 | * |
| 12 | * Triggered buffer: |
| 13 | * - illiminance_clear |
| 14 | * - illiminance_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/regmap.h> |
| 46 | #include <linux/regulator/consumer.h> |
| 47 | #include <linux/slab.h> |
| 48 | #include <linux/iio/buffer.h> |
| 49 | #include <linux/iio/events.h> |
| 50 | #include <linux/iio/iio.h> |
| 51 | #include <linux/iio/sysfs.h> |
| 52 | #include <linux/iio/trigger.h> |
| 53 | #include <linux/iio/trigger_consumer.h> |
| 54 | #include <linux/iio/triggered_buffer.h> |
| 55 | |
| 56 | #define GP2A_I2C_NAME "gp2ap020a00f" |
| 57 | |
| 58 | /* Registers */ |
| 59 | #define GP2AP020A00F_OP_REG 0x00 /* Basic operations */ |
| 60 | #define GP2AP020A00F_ALS_REG 0x01 /* ALS related settings */ |
| 61 | #define GP2AP020A00F_PS_REG 0x02 /* PS related settings */ |
| 62 | #define GP2AP020A00F_LED_REG 0x03 /* LED reg */ |
| 63 | #define GP2AP020A00F_TL_L_REG 0x04 /* ALS: Threshold low LSB */ |
| 64 | #define GP2AP020A00F_TL_H_REG 0x05 /* ALS: Threshold low MSB */ |
| 65 | #define GP2AP020A00F_TH_L_REG 0x06 /* ALS: Threshold high LSB */ |
| 66 | #define GP2AP020A00F_TH_H_REG 0x07 /* ALS: Threshold high MSB */ |
| 67 | #define GP2AP020A00F_PL_L_REG 0x08 /* PS: Threshold low LSB */ |
| 68 | #define GP2AP020A00F_PL_H_REG 0x09 /* PS: Threshold low MSB */ |
| 69 | #define GP2AP020A00F_PH_L_REG 0x0a /* PS: Threshold high LSB */ |
| 70 | #define GP2AP020A00F_PH_H_REG 0x0b /* PS: Threshold high MSB */ |
| 71 | #define GP2AP020A00F_D0_L_REG 0x0c /* ALS result: Clear/Illuminance LSB */ |
| 72 | #define GP2AP020A00F_D0_H_REG 0x0d /* ALS result: Clear/Illuminance MSB */ |
| 73 | #define GP2AP020A00F_D1_L_REG 0x0e /* ALS result: IR LSB */ |
| 74 | #define GP2AP020A00F_D1_H_REG 0x0f /* ALS result: IR LSB */ |
| 75 | #define GP2AP020A00F_D2_L_REG 0x10 /* PS result LSB */ |
| 76 | #define GP2AP020A00F_D2_H_REG 0x11 /* PS result MSB */ |
| 77 | #define GP2AP020A00F_NUM_REGS 0x12 /* Number of registers */ |
| 78 | |
| 79 | /* OP_REG bits */ |
| 80 | #define GP2AP020A00F_OP3_MASK 0x80 /* Software shutdown */ |
| 81 | #define GP2AP020A00F_OP3_SHUTDOWN 0x00 |
| 82 | #define GP2AP020A00F_OP3_OPERATION 0x80 |
| 83 | #define GP2AP020A00F_OP2_MASK 0x40 /* Auto shutdown/Continuous mode */ |
| 84 | #define GP2AP020A00F_OP2_AUTO_SHUTDOWN 0x00 |
| 85 | #define GP2AP020A00F_OP2_CONT_OPERATION 0x40 |
| 86 | #define GP2AP020A00F_OP_MASK 0x30 /* Operating mode selection */ |
| 87 | #define GP2AP020A00F_OP_ALS_AND_PS 0x00 |
| 88 | #define GP2AP020A00F_OP_ALS 0x10 |
| 89 | #define GP2AP020A00F_OP_PS 0x20 |
| 90 | #define GP2AP020A00F_OP_DEBUG 0x30 |
| 91 | #define GP2AP020A00F_PROX_MASK 0x08 /* PS: detection/non-detection */ |
| 92 | #define GP2AP020A00F_PROX_NON_DETECT 0x00 |
| 93 | #define GP2AP020A00F_PROX_DETECT 0x08 |
| 94 | #define GP2AP020A00F_FLAG_P 0x04 /* PS: interrupt result */ |
| 95 | #define GP2AP020A00F_FLAG_A 0x02 /* ALS: interrupt result */ |
| 96 | #define GP2AP020A00F_TYPE_MASK 0x01 /* Output data type selection */ |
| 97 | #define GP2AP020A00F_TYPE_MANUAL_CALC 0x00 |
| 98 | #define GP2AP020A00F_TYPE_AUTO_CALC 0x01 |
| 99 | |
| 100 | /* ALS_REG bits */ |
| 101 | #define GP2AP020A00F_PRST_MASK 0xc0 /* Number of measurement cycles */ |
| 102 | #define GP2AP020A00F_PRST_ONCE 0x00 |
| 103 | #define GP2AP020A00F_PRST_4_CYCLES 0x40 |
| 104 | #define GP2AP020A00F_PRST_8_CYCLES 0x80 |
| 105 | #define GP2AP020A00F_PRST_16_CYCLES 0xc0 |
| 106 | #define GP2AP020A00F_RES_A_MASK 0x38 /* ALS: Resolution */ |
| 107 | #define GP2AP020A00F_RES_A_800ms 0x00 |
| 108 | #define GP2AP020A00F_RES_A_400ms 0x08 |
| 109 | #define GP2AP020A00F_RES_A_200ms 0x10 |
| 110 | #define GP2AP020A00F_RES_A_100ms 0x18 |
| 111 | #define GP2AP020A00F_RES_A_25ms 0x20 |
| 112 | #define GP2AP020A00F_RES_A_6_25ms 0x28 |
| 113 | #define GP2AP020A00F_RES_A_1_56ms 0x30 |
| 114 | #define GP2AP020A00F_RES_A_0_39ms 0x38 |
| 115 | #define GP2AP020A00F_RANGE_A_MASK 0x07 /* ALS: Max measurable range */ |
| 116 | #define GP2AP020A00F_RANGE_A_x1 0x00 |
| 117 | #define GP2AP020A00F_RANGE_A_x2 0x01 |
| 118 | #define GP2AP020A00F_RANGE_A_x4 0x02 |
| 119 | #define GP2AP020A00F_RANGE_A_x8 0x03 |
| 120 | #define GP2AP020A00F_RANGE_A_x16 0x04 |
| 121 | #define GP2AP020A00F_RANGE_A_x32 0x05 |
| 122 | #define GP2AP020A00F_RANGE_A_x64 0x06 |
| 123 | #define GP2AP020A00F_RANGE_A_x128 0x07 |
| 124 | |
| 125 | /* PS_REG bits */ |
| 126 | #define GP2AP020A00F_ALC_MASK 0x80 /* Auto light cancel */ |
| 127 | #define GP2AP020A00F_ALC_ON 0x80 |
| 128 | #define GP2AP020A00F_ALC_OFF 0x00 |
| 129 | #define GP2AP020A00F_INTTYPE_MASK 0x40 /* Interrupt type setting */ |
| 130 | #define GP2AP020A00F_INTTYPE_LEVEL 0x00 |
| 131 | #define GP2AP020A00F_INTTYPE_PULSE 0x40 |
| 132 | #define GP2AP020A00F_RES_P_MASK 0x38 /* PS: Resolution */ |
| 133 | #define GP2AP020A00F_RES_P_800ms_x2 0x00 |
| 134 | #define GP2AP020A00F_RES_P_400ms_x2 0x08 |
| 135 | #define GP2AP020A00F_RES_P_200ms_x2 0x10 |
| 136 | #define GP2AP020A00F_RES_P_100ms_x2 0x18 |
| 137 | #define GP2AP020A00F_RES_P_25ms_x2 0x20 |
| 138 | #define GP2AP020A00F_RES_P_6_25ms_x2 0x28 |
| 139 | #define GP2AP020A00F_RES_P_1_56ms_x2 0x30 |
| 140 | #define GP2AP020A00F_RES_P_0_39ms_x2 0x38 |
| 141 | #define GP2AP020A00F_RANGE_P_MASK 0x07 /* PS: Max measurable range */ |
| 142 | #define GP2AP020A00F_RANGE_P_x1 0x00 |
| 143 | #define GP2AP020A00F_RANGE_P_x2 0x01 |
| 144 | #define GP2AP020A00F_RANGE_P_x4 0x02 |
| 145 | #define GP2AP020A00F_RANGE_P_x8 0x03 |
| 146 | #define GP2AP020A00F_RANGE_P_x16 0x04 |
| 147 | #define GP2AP020A00F_RANGE_P_x32 0x05 |
| 148 | #define GP2AP020A00F_RANGE_P_x64 0x06 |
| 149 | #define GP2AP020A00F_RANGE_P_x128 0x07 |
| 150 | |
| 151 | /* LED reg bits */ |
| 152 | #define GP2AP020A00F_INTVAL_MASK 0xc0 /* Intermittent operating */ |
| 153 | #define GP2AP020A00F_INTVAL_0 0x00 |
| 154 | #define GP2AP020A00F_INTVAL_4 0x40 |
| 155 | #define GP2AP020A00F_INTVAL_8 0x80 |
| 156 | #define GP2AP020A00F_INTVAL_16 0xc0 |
| 157 | #define GP2AP020A00F_IS_MASK 0x30 /* ILED drive peak current */ |
| 158 | #define GP2AP020A00F_IS_13_8mA 0x00 |
| 159 | #define GP2AP020A00F_IS_27_5mA 0x10 |
| 160 | #define GP2AP020A00F_IS_55mA 0x20 |
| 161 | #define GP2AP020A00F_IS_110mA 0x30 |
| 162 | #define GP2AP020A00F_PIN_MASK 0x0c /* INT terminal setting */ |
| 163 | #define GP2AP020A00F_PIN_ALS_OR_PS 0x00 |
| 164 | #define GP2AP020A00F_PIN_ALS 0x04 |
| 165 | #define GP2AP020A00F_PIN_PS 0x08 |
| 166 | #define GP2AP020A00F_PIN_PS_DETECT 0x0c |
| 167 | #define GP2AP020A00F_FREQ_MASK 0x02 /* LED modulation frequency */ |
| 168 | #define GP2AP020A00F_FREQ_327_5kHz 0x00 |
| 169 | #define GP2AP020A00F_FREQ_81_8kHz 0x02 |
| 170 | #define GP2AP020A00F_RST 0x01 /* Software reset */ |
| 171 | |
| 172 | #define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR 0 |
| 173 | #define GP2AP020A00F_SCAN_MODE_LIGHT_IR 1 |
| 174 | #define GP2AP020A00F_SCAN_MODE_PROXIMITY 2 |
| 175 | #define GP2AP020A00F_CHAN_TIMESTAMP 3 |
| 176 | |
| 177 | #define GP2AP020A00F_DATA_READY_TIMEOUT msecs_to_jiffies(1000) |
| 178 | #define GP2AP020A00F_DATA_REG(chan) (GP2AP020A00F_D0_L_REG + \ |
| 179 | (chan) * 2) |
| 180 | #define GP2AP020A00F_THRESH_REG(th_val_id) (GP2AP020A00F_TL_L_REG + \ |
| 181 | (th_val_id) * 2) |
| 182 | #define GP2AP020A00F_THRESH_VAL_ID(reg_addr) ((reg_addr - 4) / 2) |
| 183 | |
| 184 | #define GP2AP020A00F_SUBTRACT_MODE 0 |
| 185 | #define GP2AP020A00F_ADD_MODE 1 |
| 186 | |
| 187 | #define GP2AP020A00F_MAX_CHANNELS 3 |
| 188 | |
| 189 | enum gp2ap020a00f_opmode { |
| 190 | GP2AP020A00F_OPMODE_READ_RAW_CLEAR, |
| 191 | GP2AP020A00F_OPMODE_READ_RAW_IR, |
| 192 | GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY, |
| 193 | GP2AP020A00F_OPMODE_ALS, |
| 194 | GP2AP020A00F_OPMODE_PS, |
| 195 | GP2AP020A00F_OPMODE_ALS_AND_PS, |
| 196 | GP2AP020A00F_OPMODE_PROX_DETECT, |
| 197 | GP2AP020A00F_OPMODE_SHUTDOWN, |
| 198 | GP2AP020A00F_NUM_OPMODES, |
| 199 | }; |
| 200 | |
| 201 | enum gp2ap020a00f_cmd { |
| 202 | GP2AP020A00F_CMD_READ_RAW_CLEAR, |
| 203 | GP2AP020A00F_CMD_READ_RAW_IR, |
| 204 | GP2AP020A00F_CMD_READ_RAW_PROXIMITY, |
| 205 | GP2AP020A00F_CMD_TRIGGER_CLEAR_EN, |
| 206 | GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS, |
| 207 | GP2AP020A00F_CMD_TRIGGER_IR_EN, |
| 208 | GP2AP020A00F_CMD_TRIGGER_IR_DIS, |
| 209 | GP2AP020A00F_CMD_TRIGGER_PROX_EN, |
| 210 | GP2AP020A00F_CMD_TRIGGER_PROX_DIS, |
| 211 | GP2AP020A00F_CMD_ALS_HIGH_EV_EN, |
| 212 | GP2AP020A00F_CMD_ALS_HIGH_EV_DIS, |
| 213 | GP2AP020A00F_CMD_ALS_LOW_EV_EN, |
| 214 | GP2AP020A00F_CMD_ALS_LOW_EV_DIS, |
| 215 | GP2AP020A00F_CMD_PROX_HIGH_EV_EN, |
| 216 | GP2AP020A00F_CMD_PROX_HIGH_EV_DIS, |
| 217 | GP2AP020A00F_CMD_PROX_LOW_EV_EN, |
| 218 | GP2AP020A00F_CMD_PROX_LOW_EV_DIS, |
| 219 | }; |
| 220 | |
| 221 | enum gp2ap020a00f_flags { |
| 222 | GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, |
| 223 | GP2AP020A00F_FLAG_ALS_IR_TRIGGER, |
| 224 | GP2AP020A00F_FLAG_PROX_TRIGGER, |
| 225 | GP2AP020A00F_FLAG_PROX_RISING_EV, |
| 226 | GP2AP020A00F_FLAG_PROX_FALLING_EV, |
| 227 | GP2AP020A00F_FLAG_ALS_RISING_EV, |
| 228 | GP2AP020A00F_FLAG_ALS_FALLING_EV, |
| 229 | GP2AP020A00F_FLAG_LUX_MODE_HI, |
| 230 | GP2AP020A00F_FLAG_DATA_READY, |
| 231 | }; |
| 232 | |
| 233 | enum gp2ap020a00f_thresh_val_id { |
| 234 | GP2AP020A00F_THRESH_TL, |
| 235 | GP2AP020A00F_THRESH_TH, |
| 236 | GP2AP020A00F_THRESH_PL, |
| 237 | GP2AP020A00F_THRESH_PH, |
| 238 | }; |
| 239 | |
| 240 | struct gp2ap020a00f_data { |
| 241 | const struct gp2ap020a00f_platform_data *pdata; |
| 242 | struct i2c_client *client; |
| 243 | struct mutex lock; |
| 244 | char *buffer; |
| 245 | struct regulator *vled_reg; |
| 246 | unsigned long flags; |
| 247 | enum gp2ap020a00f_opmode cur_opmode; |
| 248 | struct iio_trigger *trig; |
| 249 | struct regmap *regmap; |
| 250 | unsigned int thresh_val[4]; |
| 251 | u8 debug_reg_addr; |
| 252 | struct irq_work work; |
| 253 | wait_queue_head_t data_ready_queue; |
| 254 | }; |
| 255 | |
| 256 | static const u8 gp2ap020a00f_reg_init_tab[] = { |
| 257 | [GP2AP020A00F_OP_REG] = GP2AP020A00F_OP3_SHUTDOWN, |
| 258 | [GP2AP020A00F_ALS_REG] = GP2AP020A00F_RES_A_25ms | |
| 259 | GP2AP020A00F_RANGE_A_x8, |
| 260 | [GP2AP020A00F_PS_REG] = GP2AP020A00F_ALC_ON | |
| 261 | GP2AP020A00F_RES_P_1_56ms_x2 | |
| 262 | GP2AP020A00F_RANGE_P_x4, |
| 263 | [GP2AP020A00F_LED_REG] = GP2AP020A00F_INTVAL_0 | |
| 264 | GP2AP020A00F_IS_110mA | |
| 265 | GP2AP020A00F_FREQ_327_5kHz, |
| 266 | [GP2AP020A00F_TL_L_REG] = 0, |
| 267 | [GP2AP020A00F_TL_H_REG] = 0, |
| 268 | [GP2AP020A00F_TH_L_REG] = 0, |
| 269 | [GP2AP020A00F_TH_H_REG] = 0, |
| 270 | [GP2AP020A00F_PL_L_REG] = 0, |
| 271 | [GP2AP020A00F_PL_H_REG] = 0, |
| 272 | [GP2AP020A00F_PH_L_REG] = 0, |
| 273 | [GP2AP020A00F_PH_H_REG] = 0, |
| 274 | }; |
| 275 | |
| 276 | static bool gp2ap020a00f_is_volatile_reg(struct device *dev, unsigned int reg) |
| 277 | { |
| 278 | switch (reg) { |
| 279 | case GP2AP020A00F_OP_REG: |
| 280 | case GP2AP020A00F_D0_L_REG: |
| 281 | case GP2AP020A00F_D0_H_REG: |
| 282 | case GP2AP020A00F_D1_L_REG: |
| 283 | case GP2AP020A00F_D1_H_REG: |
| 284 | case GP2AP020A00F_D2_L_REG: |
| 285 | case GP2AP020A00F_D2_H_REG: |
| 286 | return true; |
| 287 | default: |
| 288 | return false; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | static const struct regmap_config gp2ap020a00f_regmap_config = { |
| 293 | .reg_bits = 8, |
| 294 | .val_bits = 8, |
| 295 | |
| 296 | .max_register = GP2AP020A00F_D2_H_REG, |
| 297 | .cache_type = REGCACHE_RBTREE, |
| 298 | |
| 299 | .volatile_reg = gp2ap020a00f_is_volatile_reg, |
| 300 | }; |
| 301 | |
| 302 | static const struct gp2ap020a00f_mutable_config_regs { |
| 303 | u8 op_reg; |
| 304 | u8 als_reg; |
| 305 | u8 ps_reg; |
| 306 | u8 led_reg; |
| 307 | } opmode_regs_settings[GP2AP020A00F_NUM_OPMODES] = { |
| 308 | [GP2AP020A00F_OPMODE_READ_RAW_CLEAR] = { |
| 309 | GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION |
| 310 | | GP2AP020A00F_OP3_OPERATION |
| 311 | | GP2AP020A00F_TYPE_AUTO_CALC, |
| 312 | GP2AP020A00F_PRST_ONCE, |
| 313 | GP2AP020A00F_INTTYPE_LEVEL, |
| 314 | GP2AP020A00F_PIN_ALS |
| 315 | }, |
| 316 | [GP2AP020A00F_OPMODE_READ_RAW_IR] = { |
| 317 | GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION |
| 318 | | GP2AP020A00F_OP3_OPERATION |
| 319 | | GP2AP020A00F_TYPE_MANUAL_CALC, |
| 320 | GP2AP020A00F_PRST_ONCE, |
| 321 | GP2AP020A00F_INTTYPE_LEVEL, |
| 322 | GP2AP020A00F_PIN_ALS |
| 323 | }, |
| 324 | [GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY] = { |
| 325 | GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION |
| 326 | | GP2AP020A00F_OP3_OPERATION |
| 327 | | GP2AP020A00F_TYPE_MANUAL_CALC, |
| 328 | GP2AP020A00F_PRST_ONCE, |
| 329 | GP2AP020A00F_INTTYPE_LEVEL, |
| 330 | GP2AP020A00F_PIN_PS |
| 331 | }, |
| 332 | [GP2AP020A00F_OPMODE_PROX_DETECT] = { |
| 333 | GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION |
| 334 | | GP2AP020A00F_OP3_OPERATION |
| 335 | | GP2AP020A00F_TYPE_MANUAL_CALC, |
| 336 | GP2AP020A00F_PRST_4_CYCLES, |
| 337 | GP2AP020A00F_INTTYPE_PULSE, |
| 338 | GP2AP020A00F_PIN_PS_DETECT |
| 339 | }, |
| 340 | [GP2AP020A00F_OPMODE_ALS] = { |
| 341 | GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION |
| 342 | | GP2AP020A00F_OP3_OPERATION |
| 343 | | GP2AP020A00F_TYPE_AUTO_CALC, |
| 344 | GP2AP020A00F_PRST_ONCE, |
| 345 | GP2AP020A00F_INTTYPE_LEVEL, |
| 346 | GP2AP020A00F_PIN_ALS |
| 347 | }, |
| 348 | [GP2AP020A00F_OPMODE_PS] = { |
| 349 | GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION |
| 350 | | GP2AP020A00F_OP3_OPERATION |
| 351 | | GP2AP020A00F_TYPE_MANUAL_CALC, |
| 352 | GP2AP020A00F_PRST_4_CYCLES, |
| 353 | GP2AP020A00F_INTTYPE_LEVEL, |
| 354 | GP2AP020A00F_PIN_PS |
| 355 | }, |
| 356 | [GP2AP020A00F_OPMODE_ALS_AND_PS] = { |
| 357 | GP2AP020A00F_OP_ALS_AND_PS |
| 358 | | GP2AP020A00F_OP2_CONT_OPERATION |
| 359 | | GP2AP020A00F_OP3_OPERATION |
| 360 | | GP2AP020A00F_TYPE_AUTO_CALC, |
| 361 | GP2AP020A00F_PRST_4_CYCLES, |
| 362 | GP2AP020A00F_INTTYPE_LEVEL, |
| 363 | GP2AP020A00F_PIN_ALS_OR_PS |
| 364 | }, |
| 365 | [GP2AP020A00F_OPMODE_SHUTDOWN] = { GP2AP020A00F_OP3_SHUTDOWN, }, |
| 366 | }; |
| 367 | |
| 368 | static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data, |
| 369 | enum gp2ap020a00f_opmode op) |
| 370 | { |
| 371 | unsigned int op_reg_val; |
| 372 | int err; |
| 373 | |
| 374 | if (op != GP2AP020A00F_OPMODE_SHUTDOWN) { |
| 375 | err = regmap_read(data->regmap, GP2AP020A00F_OP_REG, |
| 376 | &op_reg_val); |
| 377 | if (err < 0) |
| 378 | return err; |
| 379 | /* |
| 380 | * Shutdown the device if the operation being executed entails |
| 381 | * mode transition. |
| 382 | */ |
| 383 | if ((opmode_regs_settings[op].op_reg & GP2AP020A00F_OP_MASK) != |
| 384 | (op_reg_val & GP2AP020A00F_OP_MASK)) { |
| 385 | /* set shutdown mode */ |
| 386 | err = regmap_update_bits(data->regmap, |
| 387 | GP2AP020A00F_OP_REG, GP2AP020A00F_OP3_MASK, |
| 388 | GP2AP020A00F_OP3_SHUTDOWN); |
| 389 | if (err < 0) |
| 390 | return err; |
| 391 | } |
| 392 | |
| 393 | err = regmap_update_bits(data->regmap, GP2AP020A00F_ALS_REG, |
| 394 | GP2AP020A00F_PRST_MASK, opmode_regs_settings[op] |
| 395 | .als_reg); |
| 396 | if (err < 0) |
| 397 | return err; |
| 398 | |
| 399 | err = regmap_update_bits(data->regmap, GP2AP020A00F_PS_REG, |
| 400 | GP2AP020A00F_INTTYPE_MASK, opmode_regs_settings[op] |
| 401 | .ps_reg); |
| 402 | if (err < 0) |
| 403 | return err; |
| 404 | |
| 405 | err = regmap_update_bits(data->regmap, GP2AP020A00F_LED_REG, |
| 406 | GP2AP020A00F_PIN_MASK, opmode_regs_settings[op] |
| 407 | .led_reg); |
| 408 | if (err < 0) |
| 409 | return err; |
| 410 | } |
| 411 | |
| 412 | /* Set OP_REG and apply operation mode (power on / off) */ |
| 413 | err = regmap_update_bits(data->regmap, |
| 414 | GP2AP020A00F_OP_REG, |
| 415 | GP2AP020A00F_OP_MASK | GP2AP020A00F_OP2_MASK | |
| 416 | GP2AP020A00F_OP3_MASK | GP2AP020A00F_TYPE_MASK, |
| 417 | opmode_regs_settings[op].op_reg); |
| 418 | if (err < 0) |
| 419 | return err; |
| 420 | |
| 421 | data->cur_opmode = op; |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data) |
| 427 | { |
| 428 | return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags) || |
| 429 | test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags) || |
| 430 | test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags) || |
| 431 | test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); |
| 432 | } |
| 433 | |
| 434 | static bool gp2ap020a00f_prox_detect_enabled(struct gp2ap020a00f_data *data) |
| 435 | { |
| 436 | return test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags) || |
| 437 | test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); |
| 438 | } |
| 439 | |
| 440 | static int gp2ap020a00f_write_event_threshold(struct gp2ap020a00f_data *data, |
| 441 | enum gp2ap020a00f_thresh_val_id th_val_id, |
| 442 | bool enable) |
| 443 | { |
| 444 | __le16 thresh_buf = 0; |
| 445 | unsigned int thresh_reg_val; |
| 446 | |
| 447 | if (!enable) |
| 448 | thresh_reg_val = 0; |
| 449 | else if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags) && |
| 450 | th_val_id != GP2AP020A00F_THRESH_PL && |
| 451 | th_val_id != GP2AP020A00F_THRESH_PH) |
| 452 | /* |
| 453 | * For the high lux mode ALS threshold has to be scaled down |
| 454 | * to allow for proper comparison with the output value. |
| 455 | */ |
| 456 | thresh_reg_val = data->thresh_val[th_val_id] / 16; |
| 457 | else |
| 458 | thresh_reg_val = data->thresh_val[th_val_id] > 16000 ? |
| 459 | 16000 : |
| 460 | data->thresh_val[th_val_id]; |
| 461 | |
| 462 | thresh_buf = cpu_to_le16(thresh_reg_val); |
| 463 | |
| 464 | return regmap_bulk_write(data->regmap, |
| 465 | GP2AP020A00F_THRESH_REG(th_val_id), |
| 466 | (u8 *)&thresh_buf, 2); |
| 467 | } |
| 468 | |
| 469 | static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data, |
| 470 | enum gp2ap020a00f_opmode diff_mode, int add_sub) |
| 471 | { |
| 472 | enum gp2ap020a00f_opmode new_mode; |
| 473 | |
| 474 | if (diff_mode != GP2AP020A00F_OPMODE_ALS && |
| 475 | diff_mode != GP2AP020A00F_OPMODE_PS) |
| 476 | return -EINVAL; |
| 477 | |
| 478 | if (add_sub == GP2AP020A00F_ADD_MODE) { |
| 479 | if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN) |
| 480 | new_mode = diff_mode; |
| 481 | else |
| 482 | new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS; |
| 483 | } else { |
| 484 | if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS) |
| 485 | new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ? |
| 486 | GP2AP020A00F_OPMODE_PS : |
| 487 | GP2AP020A00F_OPMODE_ALS; |
| 488 | else |
| 489 | new_mode = GP2AP020A00F_OPMODE_SHUTDOWN; |
| 490 | } |
| 491 | |
| 492 | return gp2ap020a00f_set_operation_mode(data, new_mode); |
| 493 | } |
| 494 | |
| 495 | static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data, |
| 496 | enum gp2ap020a00f_cmd cmd) |
| 497 | { |
| 498 | int err = 0; |
| 499 | |
| 500 | switch (cmd) { |
| 501 | case GP2AP020A00F_CMD_READ_RAW_CLEAR: |
| 502 | if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) |
| 503 | return -EBUSY; |
| 504 | err = gp2ap020a00f_set_operation_mode(data, |
| 505 | GP2AP020A00F_OPMODE_READ_RAW_CLEAR); |
| 506 | break; |
| 507 | case GP2AP020A00F_CMD_READ_RAW_IR: |
| 508 | if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) |
| 509 | return -EBUSY; |
| 510 | err = gp2ap020a00f_set_operation_mode(data, |
| 511 | GP2AP020A00F_OPMODE_READ_RAW_IR); |
| 512 | break; |
| 513 | case GP2AP020A00F_CMD_READ_RAW_PROXIMITY: |
| 514 | if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN) |
| 515 | return -EBUSY; |
| 516 | err = gp2ap020a00f_set_operation_mode(data, |
| 517 | GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY); |
| 518 | break; |
| 519 | case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN: |
| 520 | if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| 521 | return -EBUSY; |
| 522 | if (!gp2ap020a00f_als_enabled(data)) |
| 523 | err = gp2ap020a00f_alter_opmode(data, |
| 524 | GP2AP020A00F_OPMODE_ALS, |
| 525 | GP2AP020A00F_ADD_MODE); |
| 526 | set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags); |
| 527 | break; |
| 528 | case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS: |
| 529 | clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags); |
| 530 | if (gp2ap020a00f_als_enabled(data)) |
| 531 | break; |
| 532 | err = gp2ap020a00f_alter_opmode(data, |
| 533 | GP2AP020A00F_OPMODE_ALS, |
| 534 | GP2AP020A00F_SUBTRACT_MODE); |
| 535 | break; |
| 536 | case GP2AP020A00F_CMD_TRIGGER_IR_EN: |
| 537 | if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| 538 | return -EBUSY; |
| 539 | if (!gp2ap020a00f_als_enabled(data)) |
| 540 | err = gp2ap020a00f_alter_opmode(data, |
| 541 | GP2AP020A00F_OPMODE_ALS, |
| 542 | GP2AP020A00F_ADD_MODE); |
| 543 | set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags); |
| 544 | break; |
| 545 | case GP2AP020A00F_CMD_TRIGGER_IR_DIS: |
| 546 | clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags); |
| 547 | if (gp2ap020a00f_als_enabled(data)) |
| 548 | break; |
| 549 | err = gp2ap020a00f_alter_opmode(data, |
| 550 | GP2AP020A00F_OPMODE_ALS, |
| 551 | GP2AP020A00F_SUBTRACT_MODE); |
| 552 | break; |
| 553 | case GP2AP020A00F_CMD_TRIGGER_PROX_EN: |
| 554 | if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| 555 | return -EBUSY; |
| 556 | err = gp2ap020a00f_alter_opmode(data, |
| 557 | GP2AP020A00F_OPMODE_PS, |
| 558 | GP2AP020A00F_ADD_MODE); |
| 559 | set_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags); |
| 560 | break; |
| 561 | case GP2AP020A00F_CMD_TRIGGER_PROX_DIS: |
| 562 | clear_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags); |
| 563 | err = gp2ap020a00f_alter_opmode(data, |
| 564 | GP2AP020A00F_OPMODE_PS, |
| 565 | GP2AP020A00F_SUBTRACT_MODE); |
| 566 | break; |
| 567 | case GP2AP020A00F_CMD_ALS_HIGH_EV_EN: |
| 568 | if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) |
| 569 | return 0; |
| 570 | if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| 571 | return -EBUSY; |
| 572 | if (!gp2ap020a00f_als_enabled(data)) { |
| 573 | err = gp2ap020a00f_alter_opmode(data, |
| 574 | GP2AP020A00F_OPMODE_ALS, |
| 575 | GP2AP020A00F_ADD_MODE); |
| 576 | if (err < 0) |
| 577 | return err; |
| 578 | } |
| 579 | set_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags); |
| 580 | err = gp2ap020a00f_write_event_threshold(data, |
| 581 | GP2AP020A00F_THRESH_TH, true); |
| 582 | break; |
| 583 | case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS: |
| 584 | if (!test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) |
| 585 | return 0; |
| 586 | clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags); |
| 587 | if (!gp2ap020a00f_als_enabled(data)) { |
| 588 | err = gp2ap020a00f_alter_opmode(data, |
| 589 | GP2AP020A00F_OPMODE_ALS, |
| 590 | GP2AP020A00F_SUBTRACT_MODE); |
| 591 | if (err < 0) |
| 592 | return err; |
| 593 | } |
| 594 | err = gp2ap020a00f_write_event_threshold(data, |
| 595 | GP2AP020A00F_THRESH_TH, false); |
| 596 | break; |
| 597 | case GP2AP020A00F_CMD_ALS_LOW_EV_EN: |
| 598 | if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) |
| 599 | return 0; |
| 600 | if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT) |
| 601 | return -EBUSY; |
| 602 | if (!gp2ap020a00f_als_enabled(data)) { |
| 603 | err = gp2ap020a00f_alter_opmode(data, |
| 604 | GP2AP020A00F_OPMODE_ALS, |
| 605 | GP2AP020A00F_ADD_MODE); |
| 606 | if (err < 0) |
| 607 | return err; |
| 608 | } |
| 609 | set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); |
| 610 | err = gp2ap020a00f_write_event_threshold(data, |
| 611 | GP2AP020A00F_THRESH_TL, true); |
| 612 | break; |
| 613 | case GP2AP020A00F_CMD_ALS_LOW_EV_DIS: |
| 614 | if (!test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) |
| 615 | return 0; |
| 616 | clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags); |
| 617 | if (!gp2ap020a00f_als_enabled(data)) { |
| 618 | err = gp2ap020a00f_alter_opmode(data, |
| 619 | GP2AP020A00F_OPMODE_ALS, |
| 620 | GP2AP020A00F_SUBTRACT_MODE); |
| 621 | if (err < 0) |
| 622 | return err; |
| 623 | } |
| 624 | err = gp2ap020a00f_write_event_threshold(data, |
| 625 | GP2AP020A00F_THRESH_TL, false); |
| 626 | break; |
| 627 | case GP2AP020A00F_CMD_PROX_HIGH_EV_EN: |
| 628 | if (test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags)) |
| 629 | return 0; |
| 630 | if (gp2ap020a00f_als_enabled(data) || |
| 631 | data->cur_opmode == GP2AP020A00F_OPMODE_PS) |
| 632 | return -EBUSY; |
| 633 | if (!gp2ap020a00f_prox_detect_enabled(data)) { |
| 634 | err = gp2ap020a00f_set_operation_mode(data, |
| 635 | GP2AP020A00F_OPMODE_PROX_DETECT); |
| 636 | if (err < 0) |
| 637 | return err; |
| 638 | } |
| 639 | set_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags); |
| 640 | err = gp2ap020a00f_write_event_threshold(data, |
| 641 | GP2AP020A00F_THRESH_PH, true); |
| 642 | break; |
| 643 | case GP2AP020A00F_CMD_PROX_HIGH_EV_DIS: |
| 644 | if (!test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags)) |
| 645 | return 0; |
| 646 | clear_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags); |
| 647 | err = gp2ap020a00f_set_operation_mode(data, |
| 648 | GP2AP020A00F_OPMODE_SHUTDOWN); |
| 649 | if (err < 0) |
| 650 | return err; |
| 651 | err = gp2ap020a00f_write_event_threshold(data, |
| 652 | GP2AP020A00F_THRESH_PH, false); |
| 653 | break; |
| 654 | case GP2AP020A00F_CMD_PROX_LOW_EV_EN: |
| 655 | if (test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags)) |
| 656 | return 0; |
| 657 | if (gp2ap020a00f_als_enabled(data) || |
| 658 | data->cur_opmode == GP2AP020A00F_OPMODE_PS) |
| 659 | return -EBUSY; |
| 660 | if (!gp2ap020a00f_prox_detect_enabled(data)) { |
| 661 | err = gp2ap020a00f_set_operation_mode(data, |
| 662 | GP2AP020A00F_OPMODE_PROX_DETECT); |
| 663 | if (err < 0) |
| 664 | return err; |
| 665 | } |
| 666 | set_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); |
| 667 | err = gp2ap020a00f_write_event_threshold(data, |
| 668 | GP2AP020A00F_THRESH_PL, true); |
| 669 | break; |
| 670 | case GP2AP020A00F_CMD_PROX_LOW_EV_DIS: |
| 671 | if (!test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags)) |
| 672 | return 0; |
| 673 | clear_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags); |
| 674 | err = gp2ap020a00f_set_operation_mode(data, |
| 675 | GP2AP020A00F_OPMODE_SHUTDOWN); |
| 676 | if (err < 0) |
| 677 | return err; |
| 678 | err = gp2ap020a00f_write_event_threshold(data, |
| 679 | GP2AP020A00F_THRESH_PL, false); |
| 680 | break; |
| 681 | } |
| 682 | |
| 683 | return err; |
| 684 | } |
| 685 | |
| 686 | static int wait_conversion_complete_irq(struct gp2ap020a00f_data *data) |
| 687 | { |
| 688 | int ret; |
| 689 | |
| 690 | ret = wait_event_timeout(data->data_ready_queue, |
| 691 | test_bit(GP2AP020A00F_FLAG_DATA_READY, |
| 692 | &data->flags), |
| 693 | GP2AP020A00F_DATA_READY_TIMEOUT); |
| 694 | clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags); |
| 695 | |
| 696 | return ret > 0 ? 0 : -ETIME; |
| 697 | } |
| 698 | |
| 699 | static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data, |
| 700 | unsigned int output_reg, int *val) |
| 701 | { |
| 702 | u8 reg_buf[2]; |
| 703 | int err; |
| 704 | |
| 705 | err = wait_conversion_complete_irq(data); |
| 706 | if (err < 0) |
| 707 | dev_dbg(&data->client->dev, "data ready timeout\n"); |
| 708 | |
| 709 | err = regmap_bulk_read(data->regmap, output_reg, reg_buf, 2); |
| 710 | if (err < 0) |
| 711 | return err; |
| 712 | |
| 713 | *val = le16_to_cpup((__le16 *)reg_buf); |
| 714 | |
| 715 | return err; |
| 716 | } |
| 717 | |
| 718 | static bool gp2ap020a00f_adjust_lux_mode(struct gp2ap020a00f_data *data, |
| 719 | int output_val) |
| 720 | { |
| 721 | u8 new_range = 0xff; |
| 722 | int err; |
| 723 | |
| 724 | if (!test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) { |
| 725 | if (output_val > 16000) { |
| 726 | set_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags); |
| 727 | new_range = GP2AP020A00F_RANGE_A_x128; |
| 728 | } |
| 729 | } else { |
| 730 | if (output_val < 1000) { |
| 731 | clear_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags); |
| 732 | new_range = GP2AP020A00F_RANGE_A_x8; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | if (new_range != 0xff) { |
| 737 | /* Clear als threshold registers to avoid spurious |
| 738 | * events caused by lux mode transition. |
| 739 | */ |
| 740 | err = gp2ap020a00f_write_event_threshold(data, |
| 741 | GP2AP020A00F_THRESH_TH, false); |
| 742 | if (err < 0) { |
| 743 | dev_err(&data->client->dev, |
| 744 | "Clearing als threshold register failed.\n"); |
| 745 | return false; |
| 746 | } |
| 747 | |
| 748 | err = gp2ap020a00f_write_event_threshold(data, |
| 749 | GP2AP020A00F_THRESH_TL, false); |
| 750 | if (err < 0) { |
| 751 | dev_err(&data->client->dev, |
| 752 | "Clearing als threshold register failed.\n"); |
| 753 | return false; |
| 754 | } |
| 755 | |
| 756 | /* Change lux mode */ |
| 757 | err = regmap_update_bits(data->regmap, |
| 758 | GP2AP020A00F_OP_REG, |
| 759 | GP2AP020A00F_OP3_MASK, |
| 760 | GP2AP020A00F_OP3_SHUTDOWN); |
| 761 | |
| 762 | if (err < 0) { |
| 763 | dev_err(&data->client->dev, |
| 764 | "Shutting down the device failed.\n"); |
| 765 | return false; |
| 766 | } |
| 767 | |
| 768 | err = regmap_update_bits(data->regmap, |
| 769 | GP2AP020A00F_ALS_REG, |
| 770 | GP2AP020A00F_RANGE_A_MASK, |
| 771 | new_range); |
| 772 | |
| 773 | if (err < 0) { |
| 774 | dev_err(&data->client->dev, |
| 775 | "Adjusting device lux mode failed.\n"); |
| 776 | return false; |
| 777 | } |
| 778 | |
| 779 | err = regmap_update_bits(data->regmap, |
| 780 | GP2AP020A00F_OP_REG, |
| 781 | GP2AP020A00F_OP3_MASK, |
| 782 | GP2AP020A00F_OP3_OPERATION); |
| 783 | |
| 784 | if (err < 0) { |
| 785 | dev_err(&data->client->dev, |
| 786 | "Powering up the device failed.\n"); |
| 787 | return false; |
| 788 | } |
| 789 | |
| 790 | /* Adjust als threshold register values to the new lux mode */ |
| 791 | if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) { |
| 792 | err = gp2ap020a00f_write_event_threshold(data, |
| 793 | GP2AP020A00F_THRESH_TH, true); |
| 794 | if (err < 0) { |
| 795 | dev_err(&data->client->dev, |
| 796 | "Adjusting als threshold value failed.\n"); |
| 797 | return false; |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) { |
| 802 | err = gp2ap020a00f_write_event_threshold(data, |
| 803 | GP2AP020A00F_THRESH_TL, true); |
| 804 | if (err < 0) { |
| 805 | dev_err(&data->client->dev, |
| 806 | "Adjusting als threshold value failed.\n"); |
| 807 | return false; |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | return true; |
| 812 | } |
| 813 | |
| 814 | return false; |
| 815 | } |
| 816 | |
| 817 | static void gp2ap020a00f_output_to_lux(struct gp2ap020a00f_data *data, |
| 818 | int *output_val) |
| 819 | { |
| 820 | if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) |
| 821 | *output_val *= 16; |
| 822 | } |
| 823 | |
| 824 | static void gp2ap020a00f_iio_trigger_work(struct irq_work *work) |
| 825 | { |
| 826 | struct gp2ap020a00f_data *data = |
| 827 | container_of(work, struct gp2ap020a00f_data, work); |
| 828 | |
| 829 | iio_trigger_poll(data->trig, 0); |
| 830 | } |
| 831 | |
| 832 | static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data) |
| 833 | { |
| 834 | struct iio_dev *indio_dev = data; |
| 835 | struct gp2ap020a00f_data *priv = iio_priv(indio_dev); |
| 836 | unsigned int op_reg_val; |
| 837 | int ret; |
| 838 | |
| 839 | /* Read interrupt flags */ |
| 840 | ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, &op_reg_val); |
| 841 | if (ret < 0) |
| 842 | return IRQ_HANDLED; |
| 843 | |
| 844 | if (gp2ap020a00f_prox_detect_enabled(priv)) { |
| 845 | if (op_reg_val & GP2AP020A00F_PROX_DETECT) { |
| 846 | iio_push_event(indio_dev, |
| 847 | IIO_UNMOD_EVENT_CODE( |
| 848 | IIO_PROXIMITY, |
| 849 | GP2AP020A00F_SCAN_MODE_PROXIMITY, |
| 850 | IIO_EV_TYPE_ROC, |
| 851 | IIO_EV_DIR_RISING), |
| 852 | iio_get_time_ns()); |
| 853 | } else { |
| 854 | iio_push_event(indio_dev, |
| 855 | IIO_UNMOD_EVENT_CODE( |
| 856 | IIO_PROXIMITY, |
| 857 | GP2AP020A00F_SCAN_MODE_PROXIMITY, |
| 858 | IIO_EV_TYPE_ROC, |
| 859 | IIO_EV_DIR_FALLING), |
| 860 | iio_get_time_ns()); |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | return IRQ_HANDLED; |
| 865 | } |
| 866 | |
| 867 | static irqreturn_t gp2ap020a00f_thresh_event_handler(int irq, void *data) |
| 868 | { |
| 869 | struct iio_dev *indio_dev = data; |
| 870 | struct gp2ap020a00f_data *priv = iio_priv(indio_dev); |
| 871 | u8 op_reg_flags, d0_reg_buf[2]; |
| 872 | unsigned int output_val, op_reg_val; |
| 873 | int thresh_val_id, ret; |
| 874 | |
| 875 | /* Read interrupt flags */ |
| 876 | ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, |
| 877 | &op_reg_val); |
| 878 | if (ret < 0) |
| 879 | goto done; |
| 880 | |
| 881 | op_reg_flags = op_reg_val & (GP2AP020A00F_FLAG_A | GP2AP020A00F_FLAG_P |
| 882 | | GP2AP020A00F_PROX_DETECT); |
| 883 | |
| 884 | op_reg_val &= (~GP2AP020A00F_FLAG_A & ~GP2AP020A00F_FLAG_P |
| 885 | & ~GP2AP020A00F_PROX_DETECT); |
| 886 | |
| 887 | /* Clear interrupt flags (if not in INTTYPE_PULSE mode) */ |
| 888 | if (priv->cur_opmode != GP2AP020A00F_OPMODE_PROX_DETECT) { |
| 889 | ret = regmap_write(priv->regmap, GP2AP020A00F_OP_REG, |
| 890 | op_reg_val); |
| 891 | if (ret < 0) |
| 892 | goto done; |
| 893 | } |
| 894 | |
| 895 | if (op_reg_flags & GP2AP020A00F_FLAG_A) { |
| 896 | /* Check D0 register to assess if the lux mode |
| 897 | * transition is required. |
| 898 | */ |
| 899 | ret = regmap_bulk_read(priv->regmap, GP2AP020A00F_D0_L_REG, |
| 900 | d0_reg_buf, 2); |
| 901 | if (ret < 0) |
| 902 | goto done; |
| 903 | |
| 904 | output_val = le16_to_cpup((__le16 *)d0_reg_buf); |
| 905 | |
| 906 | if (gp2ap020a00f_adjust_lux_mode(priv, output_val)) |
| 907 | goto done; |
| 908 | |
| 909 | gp2ap020a00f_output_to_lux(priv, &output_val); |
| 910 | |
| 911 | /* |
| 912 | * We need to check output value to distinguish |
| 913 | * between high and low ambient light threshold event. |
| 914 | */ |
| 915 | if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &priv->flags)) { |
| 916 | thresh_val_id = |
| 917 | GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TH_L_REG); |
| 918 | if (output_val > priv->thresh_val[thresh_val_id]) |
| 919 | iio_push_event(indio_dev, |
| 920 | IIO_MOD_EVENT_CODE( |
| 921 | IIO_LIGHT, |
| 922 | GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, |
| 923 | IIO_MOD_LIGHT_CLEAR, |
| 924 | IIO_EV_TYPE_THRESH, |
| 925 | IIO_EV_DIR_RISING), |
| 926 | iio_get_time_ns()); |
| 927 | } |
| 928 | |
| 929 | if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &priv->flags)) { |
| 930 | thresh_val_id = |
| 931 | GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TL_L_REG); |
| 932 | if (output_val < priv->thresh_val[thresh_val_id]) |
| 933 | iio_push_event(indio_dev, |
| 934 | IIO_MOD_EVENT_CODE( |
| 935 | IIO_LIGHT, |
| 936 | GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, |
| 937 | IIO_MOD_LIGHT_CLEAR, |
| 938 | IIO_EV_TYPE_THRESH, |
| 939 | IIO_EV_DIR_FALLING), |
| 940 | iio_get_time_ns()); |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | if (priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR || |
| 945 | priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR || |
| 946 | priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) { |
| 947 | set_bit(GP2AP020A00F_FLAG_DATA_READY, &priv->flags); |
| 948 | wake_up(&priv->data_ready_queue); |
| 949 | goto done; |
| 950 | } |
| 951 | |
| 952 | if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &priv->flags) || |
| 953 | test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &priv->flags) || |
| 954 | test_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &priv->flags)) |
| 955 | /* This fires off the trigger. */ |
| 956 | irq_work_queue(&priv->work); |
| 957 | |
| 958 | done: |
| 959 | return IRQ_HANDLED; |
| 960 | } |
| 961 | |
| 962 | static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data) |
| 963 | { |
| 964 | struct iio_poll_func *pf = data; |
| 965 | struct iio_dev *indio_dev = pf->indio_dev; |
| 966 | struct gp2ap020a00f_data *priv = iio_priv(indio_dev); |
| 967 | size_t d_size = 0; |
| 968 | __le32 light_lux; |
| 969 | int i, out_val, ret; |
| 970 | |
| 971 | for_each_set_bit(i, indio_dev->active_scan_mask, |
| 972 | indio_dev->masklength) { |
| 973 | ret = regmap_bulk_read(priv->regmap, |
| 974 | GP2AP020A00F_DATA_REG(i), |
| 975 | &priv->buffer[d_size], 2); |
| 976 | if (ret < 0) |
| 977 | goto done; |
| 978 | |
| 979 | if (i == GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR || |
| 980 | i == GP2AP020A00F_SCAN_MODE_LIGHT_IR) { |
| 981 | out_val = le16_to_cpup((__le16 *)&priv->buffer[d_size]); |
| 982 | gp2ap020a00f_output_to_lux(priv, &out_val); |
| 983 | light_lux = cpu_to_le32(out_val); |
| 984 | memcpy(&priv->buffer[d_size], (u8 *)&light_lux, 4); |
| 985 | d_size += 4; |
| 986 | } else { |
| 987 | d_size += 2; |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | if (indio_dev->scan_timestamp) { |
| 992 | s64 *timestamp = (s64 *)((u8 *)priv->buffer + |
| 993 | ALIGN(d_size, sizeof(s64))); |
| 994 | *timestamp = pf->timestamp; |
| 995 | } |
| 996 | |
| 997 | iio_push_to_buffers(indio_dev, priv->buffer); |
| 998 | done: |
| 999 | iio_trigger_notify_done(indio_dev->trig); |
| 1000 | |
| 1001 | return IRQ_HANDLED; |
| 1002 | } |
| 1003 | |
| 1004 | static u8 gp2ap020a00f_get_reg_by_event_code(u64 event_code) |
| 1005 | { |
| 1006 | int event_dir = IIO_EVENT_CODE_EXTRACT_DIR(event_code); |
| 1007 | |
| 1008 | switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { |
| 1009 | case IIO_PROXIMITY: |
| 1010 | if (event_dir == IIO_EV_DIR_RISING) |
| 1011 | return GP2AP020A00F_PH_L_REG; |
| 1012 | else |
| 1013 | return GP2AP020A00F_PL_L_REG; |
| 1014 | case IIO_LIGHT: |
| 1015 | if (event_dir == IIO_EV_DIR_RISING) |
| 1016 | return GP2AP020A00F_TH_L_REG; |
| 1017 | else |
| 1018 | return GP2AP020A00F_TL_L_REG; |
| 1019 | } |
| 1020 | |
| 1021 | return -EINVAL; |
| 1022 | } |
| 1023 | |
| 1024 | static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev, |
| 1025 | u64 event_code, int val) |
| 1026 | { |
| 1027 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1028 | bool event_en = false; |
| 1029 | u8 thresh_val_id; |
| 1030 | u8 thresh_reg_l; |
| 1031 | int err = 0; |
| 1032 | |
| 1033 | mutex_lock(&data->lock); |
| 1034 | |
| 1035 | thresh_reg_l = gp2ap020a00f_get_reg_by_event_code(event_code); |
| 1036 | thresh_val_id = GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l); |
| 1037 | |
| 1038 | if (thresh_val_id > GP2AP020A00F_THRESH_PH) { |
| 1039 | err = -EINVAL; |
| 1040 | goto error_unlock; |
| 1041 | } |
| 1042 | |
| 1043 | switch (thresh_reg_l) { |
| 1044 | case GP2AP020A00F_TH_L_REG: |
| 1045 | event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, |
| 1046 | &data->flags); |
| 1047 | break; |
| 1048 | case GP2AP020A00F_TL_L_REG: |
| 1049 | event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, |
| 1050 | &data->flags); |
| 1051 | break; |
| 1052 | case GP2AP020A00F_PH_L_REG: |
| 1053 | if (val == 0) { |
| 1054 | err = -EINVAL; |
| 1055 | goto error_unlock; |
| 1056 | } |
| 1057 | event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, |
| 1058 | &data->flags); |
| 1059 | break; |
| 1060 | case GP2AP020A00F_PL_L_REG: |
| 1061 | if (val == 0) { |
| 1062 | err = -EINVAL; |
| 1063 | goto error_unlock; |
| 1064 | } |
| 1065 | event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, |
| 1066 | &data->flags); |
| 1067 | break; |
| 1068 | } |
| 1069 | |
| 1070 | data->thresh_val[thresh_val_id] = val; |
| 1071 | err = gp2ap020a00f_write_event_threshold(data, thresh_val_id, |
| 1072 | event_en); |
| 1073 | error_unlock: |
| 1074 | mutex_unlock(&data->lock); |
| 1075 | |
| 1076 | return err; |
| 1077 | } |
| 1078 | |
| 1079 | static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev, |
| 1080 | u64 event_code, int *val) |
| 1081 | { |
| 1082 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1083 | u8 thresh_reg_l; |
| 1084 | int err = 0; |
| 1085 | |
| 1086 | mutex_lock(&data->lock); |
| 1087 | |
| 1088 | thresh_reg_l = gp2ap020a00f_get_reg_by_event_code(event_code); |
| 1089 | |
| 1090 | if (thresh_reg_l > GP2AP020A00F_PH_L_REG) { |
| 1091 | err = -EINVAL; |
| 1092 | goto error_unlock; |
| 1093 | } |
| 1094 | |
| 1095 | *val = data->thresh_val[GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l)]; |
| 1096 | |
| 1097 | error_unlock: |
| 1098 | mutex_unlock(&data->lock); |
| 1099 | |
| 1100 | return err; |
| 1101 | } |
| 1102 | |
| 1103 | static int gp2ap020a00f_write_prox_event_config(struct iio_dev *indio_dev, |
| 1104 | u64 event_code, int state) |
| 1105 | { |
| 1106 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1107 | enum gp2ap020a00f_cmd cmd_high_ev, cmd_low_ev; |
| 1108 | int err; |
| 1109 | |
| 1110 | cmd_high_ev = state ? GP2AP020A00F_CMD_PROX_HIGH_EV_EN : |
| 1111 | GP2AP020A00F_CMD_PROX_HIGH_EV_DIS; |
| 1112 | cmd_low_ev = state ? GP2AP020A00F_CMD_PROX_LOW_EV_EN : |
| 1113 | GP2AP020A00F_CMD_PROX_LOW_EV_DIS; |
| 1114 | |
| 1115 | /* |
| 1116 | * In order to enable proximity detection feature in the device |
| 1117 | * both high and low threshold registers have to be written |
| 1118 | * with different values, greater than zero. |
| 1119 | */ |
| 1120 | if (state) { |
| 1121 | if (data->thresh_val[GP2AP020A00F_THRESH_PL] == 0) |
| 1122 | return -EINVAL; |
| 1123 | |
| 1124 | if (data->thresh_val[GP2AP020A00F_THRESH_PH] == 0) |
| 1125 | return -EINVAL; |
| 1126 | } |
| 1127 | |
| 1128 | err = gp2ap020a00f_exec_cmd(data, cmd_high_ev); |
| 1129 | if (err < 0) |
| 1130 | return err; |
| 1131 | |
| 1132 | err = gp2ap020a00f_exec_cmd(data, cmd_low_ev); |
| 1133 | if (err < 0) |
| 1134 | return err; |
| 1135 | |
| 1136 | free_irq(data->client->irq, indio_dev); |
| 1137 | |
| 1138 | if (state) |
| 1139 | err = request_threaded_irq(data->client->irq, NULL, |
| 1140 | &gp2ap020a00f_prox_sensing_handler, |
| 1141 | IRQF_TRIGGER_RISING | |
| 1142 | IRQF_TRIGGER_FALLING | |
| 1143 | IRQF_ONESHOT, |
| 1144 | "gp2ap020a00f_prox_sensing", |
| 1145 | indio_dev); |
| 1146 | else { |
| 1147 | err = request_threaded_irq(data->client->irq, NULL, |
| 1148 | &gp2ap020a00f_thresh_event_handler, |
| 1149 | IRQF_TRIGGER_FALLING | |
| 1150 | IRQF_ONESHOT, |
| 1151 | "gp2ap020a00f_thresh_event", |
| 1152 | indio_dev); |
| 1153 | } |
| 1154 | |
| 1155 | return err; |
| 1156 | } |
| 1157 | |
| 1158 | static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev, |
| 1159 | u64 event_code, int state) |
| 1160 | { |
| 1161 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1162 | enum gp2ap020a00f_cmd cmd; |
| 1163 | int err; |
| 1164 | |
| 1165 | mutex_lock(&data->lock); |
| 1166 | |
| 1167 | switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { |
| 1168 | case IIO_PROXIMITY: |
| 1169 | err = gp2ap020a00f_write_prox_event_config(indio_dev, |
| 1170 | event_code, state); |
| 1171 | break; |
| 1172 | case IIO_LIGHT: |
| 1173 | if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) |
| 1174 | == IIO_EV_DIR_RISING) { |
| 1175 | cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN : |
| 1176 | GP2AP020A00F_CMD_ALS_HIGH_EV_DIS; |
| 1177 | err = gp2ap020a00f_exec_cmd(data, cmd); |
| 1178 | } else { |
| 1179 | cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN : |
| 1180 | GP2AP020A00F_CMD_ALS_LOW_EV_DIS; |
| 1181 | err = gp2ap020a00f_exec_cmd(data, cmd); |
| 1182 | } |
| 1183 | break; |
| 1184 | default: |
| 1185 | err = -EINVAL; |
| 1186 | } |
| 1187 | |
| 1188 | mutex_unlock(&data->lock); |
| 1189 | |
| 1190 | return err; |
| 1191 | } |
| 1192 | |
| 1193 | static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev, |
| 1194 | u64 event_code) |
| 1195 | { |
| 1196 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1197 | int event_en = 0; |
| 1198 | |
| 1199 | mutex_lock(&data->lock); |
| 1200 | |
| 1201 | switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) { |
| 1202 | case IIO_PROXIMITY: |
| 1203 | if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) |
| 1204 | == IIO_EV_DIR_RISING) |
| 1205 | event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, |
| 1206 | &data->flags); |
| 1207 | else |
| 1208 | event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, |
| 1209 | &data->flags); |
| 1210 | break; |
| 1211 | case IIO_LIGHT: |
| 1212 | if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) |
| 1213 | == IIO_EV_DIR_RISING) |
| 1214 | event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, |
| 1215 | &data->flags); |
| 1216 | else |
| 1217 | event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, |
| 1218 | &data->flags); |
| 1219 | break; |
| 1220 | } |
| 1221 | |
| 1222 | mutex_unlock(&data->lock); |
| 1223 | |
| 1224 | return event_en; |
| 1225 | } |
| 1226 | |
| 1227 | static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data, |
| 1228 | struct iio_chan_spec const *chan, int *val) |
| 1229 | { |
| 1230 | enum gp2ap020a00f_cmd cmd; |
| 1231 | int err; |
| 1232 | |
| 1233 | switch (chan->scan_index) { |
| 1234 | case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: |
| 1235 | cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR; |
| 1236 | break; |
| 1237 | case GP2AP020A00F_SCAN_MODE_LIGHT_IR: |
| 1238 | cmd = GP2AP020A00F_CMD_READ_RAW_IR; |
| 1239 | break; |
| 1240 | case GP2AP020A00F_SCAN_MODE_PROXIMITY: |
| 1241 | cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY; |
| 1242 | break; |
| 1243 | default: |
| 1244 | return -EINVAL; |
| 1245 | } |
| 1246 | |
| 1247 | err = gp2ap020a00f_exec_cmd(data, cmd); |
| 1248 | if (err < 0) { |
| 1249 | dev_err(&data->client->dev, |
| 1250 | "gp2ap020a00f_exec_cmd failed\n"); |
| 1251 | goto error_ret; |
| 1252 | } |
| 1253 | |
| 1254 | err = gp2ap020a00f_read_output(data, chan->address, val); |
| 1255 | if (err < 0) |
| 1256 | dev_err(&data->client->dev, |
| 1257 | "gp2ap020a00f_read_output failed\n"); |
| 1258 | |
| 1259 | err = gp2ap020a00f_set_operation_mode(data, |
| 1260 | GP2AP020A00F_OPMODE_SHUTDOWN); |
| 1261 | if (err < 0) |
| 1262 | dev_err(&data->client->dev, |
| 1263 | "Failed to shut down the device.\n"); |
| 1264 | |
| 1265 | if (cmd == GP2AP020A00F_CMD_READ_RAW_CLEAR || |
| 1266 | cmd == GP2AP020A00F_CMD_READ_RAW_IR) |
| 1267 | gp2ap020a00f_output_to_lux(data, val); |
| 1268 | |
| 1269 | error_ret: |
| 1270 | return err; |
| 1271 | } |
| 1272 | |
| 1273 | static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev, |
| 1274 | struct iio_chan_spec const *chan, |
| 1275 | int *val, int *val2, |
| 1276 | long mask) |
| 1277 | { |
| 1278 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1279 | int err = -EINVAL; |
| 1280 | |
| 1281 | mutex_lock(&data->lock); |
| 1282 | |
| 1283 | switch (mask) { |
| 1284 | case IIO_CHAN_INFO_RAW: |
| 1285 | if (iio_buffer_enabled(indio_dev)) { |
| 1286 | err = -EBUSY; |
| 1287 | goto error_unlock; |
| 1288 | } |
| 1289 | |
| 1290 | err = gp2ap020a00f_read_channel(data, chan, val); |
| 1291 | break; |
| 1292 | } |
| 1293 | |
| 1294 | error_unlock: |
| 1295 | mutex_unlock(&data->lock); |
| 1296 | |
| 1297 | return err < 0 ? err : IIO_VAL_INT; |
| 1298 | } |
| 1299 | |
| 1300 | static const struct iio_chan_spec gp2ap020a00f_channels[] = { |
| 1301 | { |
| 1302 | .type = IIO_LIGHT, |
| 1303 | .channel2 = IIO_MOD_LIGHT_CLEAR, |
| 1304 | .modified = 1, |
| 1305 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| 1306 | .scan_type = { |
| 1307 | .sign = 'u', |
| 1308 | .realbits = 24, |
| 1309 | .shift = 0, |
| 1310 | .storagebits = 32, |
| 1311 | .endianness = IIO_LE, |
| 1312 | }, |
| 1313 | .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR, |
| 1314 | .address = GP2AP020A00F_D0_L_REG, |
| 1315 | .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, |
| 1316 | IIO_EV_DIR_RISING) | |
| 1317 | IIO_EV_BIT(IIO_EV_TYPE_THRESH, |
| 1318 | IIO_EV_DIR_FALLING), |
| 1319 | }, |
| 1320 | { |
| 1321 | .type = IIO_LIGHT, |
| 1322 | .channel2 = IIO_MOD_LIGHT_IR, |
| 1323 | .modified = 1, |
| 1324 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| 1325 | .scan_type = { |
| 1326 | .sign = 'u', |
| 1327 | .realbits = 24, |
| 1328 | .shift = 0, |
| 1329 | .storagebits = 32, |
| 1330 | .endianness = IIO_LE, |
| 1331 | }, |
| 1332 | .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR, |
| 1333 | .address = GP2AP020A00F_D1_L_REG, |
| 1334 | }, |
| 1335 | { |
| 1336 | .type = IIO_PROXIMITY, |
| 1337 | .modified = 0, |
| 1338 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| 1339 | .scan_type = { |
| 1340 | .sign = 'u', |
| 1341 | .realbits = 16, |
| 1342 | .shift = 0, |
| 1343 | .storagebits = 16, |
| 1344 | .endianness = IIO_LE, |
| 1345 | }, |
| 1346 | .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY, |
| 1347 | .address = GP2AP020A00F_D2_L_REG, |
| 1348 | .event_mask = IIO_EV_BIT(IIO_EV_TYPE_ROC, |
| 1349 | IIO_EV_DIR_RISING) | |
| 1350 | IIO_EV_BIT(IIO_EV_TYPE_ROC, |
| 1351 | IIO_EV_DIR_FALLING), |
| 1352 | }, |
| 1353 | IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP), |
| 1354 | }; |
| 1355 | |
| 1356 | static const struct iio_info gp2ap020a00f_info = { |
| 1357 | .read_raw = &gp2ap020a00f_read_raw, |
| 1358 | .read_event_value = &gp2ap020a00f_read_event_val, |
| 1359 | .read_event_config = &gp2ap020a00f_read_event_config, |
| 1360 | .write_event_value = &gp2ap020a00f_write_event_val, |
| 1361 | .write_event_config = &gp2ap020a00f_write_event_config, |
| 1362 | .driver_module = THIS_MODULE, |
| 1363 | }; |
| 1364 | |
| 1365 | static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev) |
| 1366 | { |
| 1367 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1368 | int i, err = 0; |
| 1369 | |
| 1370 | mutex_lock(&data->lock); |
| 1371 | |
| 1372 | /* |
| 1373 | * Enable triggers according to the scan_mask. Enabling either |
| 1374 | * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS |
| 1375 | * module in the device, which generates samples in both D0 (clear) |
| 1376 | * and D1 (ir) registers. As the two registers are bound to the |
| 1377 | * two separate IIO channels they are treated in the driver logic |
| 1378 | * as if they were controlled independently. |
| 1379 | */ |
| 1380 | for_each_set_bit(i, indio_dev->active_scan_mask, |
| 1381 | indio_dev->masklength) { |
| 1382 | switch (i) { |
| 1383 | case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: |
| 1384 | err = gp2ap020a00f_exec_cmd(data, |
| 1385 | GP2AP020A00F_CMD_TRIGGER_CLEAR_EN); |
| 1386 | break; |
| 1387 | case GP2AP020A00F_SCAN_MODE_LIGHT_IR: |
| 1388 | err = gp2ap020a00f_exec_cmd(data, |
| 1389 | GP2AP020A00F_CMD_TRIGGER_IR_EN); |
| 1390 | break; |
| 1391 | case GP2AP020A00F_SCAN_MODE_PROXIMITY: |
| 1392 | err = gp2ap020a00f_exec_cmd(data, |
| 1393 | GP2AP020A00F_CMD_TRIGGER_PROX_EN); |
| 1394 | break; |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | if (err < 0) |
| 1399 | goto error_unlock; |
| 1400 | |
| 1401 | data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); |
| 1402 | if (!data->buffer) { |
| 1403 | err = -ENOMEM; |
| 1404 | goto error_unlock; |
| 1405 | } |
| 1406 | |
| 1407 | err = iio_triggered_buffer_postenable(indio_dev); |
| 1408 | |
| 1409 | error_unlock: |
| 1410 | mutex_unlock(&data->lock); |
| 1411 | |
| 1412 | return err; |
| 1413 | } |
| 1414 | |
| 1415 | static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev) |
| 1416 | { |
| 1417 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1418 | int i, err; |
| 1419 | |
| 1420 | mutex_lock(&data->lock); |
| 1421 | |
| 1422 | err = iio_triggered_buffer_predisable(indio_dev); |
| 1423 | if (err < 0) |
| 1424 | goto error_unlock; |
| 1425 | |
| 1426 | for_each_set_bit(i, indio_dev->active_scan_mask, |
| 1427 | indio_dev->masklength) { |
| 1428 | switch (i) { |
| 1429 | case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR: |
| 1430 | err = gp2ap020a00f_exec_cmd(data, |
| 1431 | GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS); |
| 1432 | break; |
| 1433 | case GP2AP020A00F_SCAN_MODE_LIGHT_IR: |
| 1434 | err = gp2ap020a00f_exec_cmd(data, |
| 1435 | GP2AP020A00F_CMD_TRIGGER_IR_DIS); |
| 1436 | break; |
| 1437 | case GP2AP020A00F_SCAN_MODE_PROXIMITY: |
| 1438 | err = gp2ap020a00f_exec_cmd(data, |
| 1439 | GP2AP020A00F_CMD_TRIGGER_PROX_DIS); |
| 1440 | break; |
| 1441 | } |
| 1442 | } |
| 1443 | |
| 1444 | if (err == 0) |
| 1445 | kfree(data->buffer); |
| 1446 | |
| 1447 | error_unlock: |
| 1448 | mutex_unlock(&data->lock); |
| 1449 | |
| 1450 | return err; |
| 1451 | } |
| 1452 | |
| 1453 | static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = { |
| 1454 | .preenable = &iio_sw_buffer_preenable, |
| 1455 | .postenable = &gp2ap020a00f_buffer_postenable, |
| 1456 | .predisable = &gp2ap020a00f_buffer_predisable, |
| 1457 | }; |
| 1458 | |
| 1459 | static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = { |
| 1460 | .owner = THIS_MODULE, |
| 1461 | }; |
| 1462 | |
| 1463 | static int gp2ap020a00f_probe(struct i2c_client *client, |
| 1464 | const struct i2c_device_id *id) |
| 1465 | { |
| 1466 | struct gp2ap020a00f_data *data; |
| 1467 | struct iio_dev *indio_dev; |
| 1468 | struct regmap *regmap; |
| 1469 | int err; |
| 1470 | |
| 1471 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| 1472 | if (!indio_dev) |
| 1473 | return -ENOMEM; |
| 1474 | |
| 1475 | data = iio_priv(indio_dev); |
| 1476 | |
| 1477 | data->vled_reg = devm_regulator_get(&client->dev, "vled"); |
| 1478 | if (IS_ERR(data->vled_reg)) |
| 1479 | return PTR_ERR(data->vled_reg); |
| 1480 | |
| 1481 | err = regulator_enable(data->vled_reg); |
| 1482 | if (err) |
| 1483 | return err; |
| 1484 | |
| 1485 | regmap = devm_regmap_init_i2c(client, &gp2ap020a00f_regmap_config); |
| 1486 | if (IS_ERR(regmap)) { |
| 1487 | dev_err(&client->dev, "Regmap initialization failed.\n"); |
| 1488 | err = PTR_ERR(regmap); |
| 1489 | goto error_regulator_disable; |
| 1490 | } |
| 1491 | |
| 1492 | /* Initialize device registers */ |
| 1493 | err = regmap_bulk_write(regmap, GP2AP020A00F_OP_REG, |
| 1494 | gp2ap020a00f_reg_init_tab, |
| 1495 | ARRAY_SIZE(gp2ap020a00f_reg_init_tab)); |
| 1496 | |
| 1497 | if (err < 0) { |
| 1498 | dev_err(&client->dev, "Device initialization failed.\n"); |
| 1499 | goto error_regulator_disable; |
| 1500 | } |
| 1501 | |
| 1502 | i2c_set_clientdata(client, indio_dev); |
| 1503 | |
| 1504 | data->client = client; |
| 1505 | data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN; |
| 1506 | data->regmap = regmap; |
| 1507 | init_waitqueue_head(&data->data_ready_queue); |
| 1508 | |
| 1509 | mutex_init(&data->lock); |
| 1510 | indio_dev->dev.parent = &client->dev; |
| 1511 | indio_dev->channels = gp2ap020a00f_channels; |
| 1512 | indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels); |
| 1513 | indio_dev->info = &gp2ap020a00f_info; |
| 1514 | indio_dev->name = id->name; |
| 1515 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 1516 | |
| 1517 | /* Allocate buffer */ |
| 1518 | err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, |
| 1519 | &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops); |
| 1520 | if (err < 0) |
| 1521 | goto error_regulator_disable; |
| 1522 | |
| 1523 | /* Allocate trigger */ |
| 1524 | data->trig = devm_iio_trigger_alloc(&client->dev, "%s-trigger", |
| 1525 | indio_dev->name); |
| 1526 | if (data->trig == NULL) { |
| 1527 | err = -ENOMEM; |
| 1528 | dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n"); |
| 1529 | goto error_uninit_buffer; |
| 1530 | } |
| 1531 | |
| 1532 | /* This needs to be requested here for read_raw calls to work. */ |
| 1533 | err = request_threaded_irq(client->irq, NULL, |
| 1534 | &gp2ap020a00f_thresh_event_handler, |
| 1535 | IRQF_TRIGGER_FALLING | |
| 1536 | IRQF_ONESHOT, |
| 1537 | "gp2ap020a00f_als_event", |
| 1538 | indio_dev); |
| 1539 | if (err < 0) { |
| 1540 | dev_err(&client->dev, "Irq request failed.\n"); |
| 1541 | goto error_uninit_buffer; |
| 1542 | } |
| 1543 | |
| 1544 | data->trig->ops = &gp2ap020a00f_trigger_ops; |
| 1545 | data->trig->dev.parent = &data->client->dev; |
| 1546 | |
| 1547 | init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work); |
| 1548 | |
| 1549 | err = iio_trigger_register(data->trig); |
| 1550 | if (err < 0) { |
| 1551 | dev_err(&client->dev, "Failed to register iio trigger.\n"); |
| 1552 | goto error_free_irq; |
| 1553 | } |
| 1554 | |
| 1555 | err = iio_device_register(indio_dev); |
| 1556 | if (err < 0) |
| 1557 | goto error_trigger_unregister; |
| 1558 | |
| 1559 | return 0; |
| 1560 | |
| 1561 | error_trigger_unregister: |
| 1562 | iio_trigger_unregister(data->trig); |
| 1563 | error_free_irq: |
| 1564 | free_irq(client->irq, indio_dev); |
| 1565 | error_uninit_buffer: |
| 1566 | iio_triggered_buffer_cleanup(indio_dev); |
| 1567 | error_regulator_disable: |
| 1568 | regulator_disable(data->vled_reg); |
| 1569 | |
| 1570 | return err; |
| 1571 | } |
| 1572 | |
| 1573 | static int gp2ap020a00f_remove(struct i2c_client *client) |
| 1574 | { |
| 1575 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 1576 | struct gp2ap020a00f_data *data = iio_priv(indio_dev); |
| 1577 | int err; |
| 1578 | |
| 1579 | err = gp2ap020a00f_set_operation_mode(data, |
| 1580 | GP2AP020A00F_OPMODE_SHUTDOWN); |
| 1581 | if (err < 0) |
| 1582 | dev_err(&indio_dev->dev, "Failed to power off the device.\n"); |
| 1583 | |
| 1584 | iio_device_unregister(indio_dev); |
| 1585 | iio_trigger_unregister(data->trig); |
| 1586 | free_irq(client->irq, indio_dev); |
| 1587 | iio_triggered_buffer_cleanup(indio_dev); |
| 1588 | regulator_disable(data->vled_reg); |
| 1589 | |
| 1590 | return 0; |
| 1591 | } |
| 1592 | |
| 1593 | static const struct i2c_device_id gp2ap020a00f_id[] = { |
| 1594 | { GP2A_I2C_NAME, 0 }, |
| 1595 | { } |
| 1596 | }; |
| 1597 | |
| 1598 | MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id); |
| 1599 | |
| 1600 | #ifdef CONFIG_OF |
| 1601 | static const struct of_device_id gp2ap020a00f_of_match[] = { |
| 1602 | { .compatible = "sharp,gp2ap020a00f" }, |
| 1603 | { } |
| 1604 | }; |
| 1605 | #endif |
| 1606 | |
| 1607 | static struct i2c_driver gp2ap020a00f_driver = { |
| 1608 | .driver = { |
| 1609 | .name = GP2A_I2C_NAME, |
| 1610 | .of_match_table = of_match_ptr(gp2ap020a00f_of_match), |
| 1611 | .owner = THIS_MODULE, |
| 1612 | }, |
| 1613 | .probe = gp2ap020a00f_probe, |
| 1614 | .remove = gp2ap020a00f_remove, |
| 1615 | .id_table = gp2ap020a00f_id, |
| 1616 | }; |
| 1617 | |
| 1618 | module_i2c_driver(gp2ap020a00f_driver); |
| 1619 | |
| 1620 | MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>"); |
| 1621 | MODULE_DESCRIPTION("Sharp GP2AP020A00F Proximity/ALS sensor driver"); |
| 1622 | MODULE_LICENSE("GPL v2"); |