diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/apds990x.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/apds990x.c | 1286 |
1 files changed, 0 insertions, 1286 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/apds990x.c b/ANDROID_3.4.5/drivers/misc/apds990x.c deleted file mode 100644 index ee74244a..00000000 --- a/ANDROID_3.4.5/drivers/misc/apds990x.c +++ /dev/null @@ -1,1286 +0,0 @@ -/* - * This file is part of the APDS990x sensor driver. - * Chip is combined proximity and ambient light sensor. - * - * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). - * - * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/i2c.h> -#include <linux/interrupt.h> -#include <linux/mutex.h> -#include <linux/regulator/consumer.h> -#include <linux/pm_runtime.h> -#include <linux/delay.h> -#include <linux/wait.h> -#include <linux/slab.h> -#include <linux/i2c/apds990x.h> - -/* Register map */ -#define APDS990X_ENABLE 0x00 /* Enable of states and interrupts */ -#define APDS990X_ATIME 0x01 /* ALS ADC time */ -#define APDS990X_PTIME 0x02 /* Proximity ADC time */ -#define APDS990X_WTIME 0x03 /* Wait time */ -#define APDS990X_AILTL 0x04 /* ALS interrupt low threshold low byte */ -#define APDS990X_AILTH 0x05 /* ALS interrupt low threshold hi byte */ -#define APDS990X_AIHTL 0x06 /* ALS interrupt hi threshold low byte */ -#define APDS990X_AIHTH 0x07 /* ALS interrupt hi threshold hi byte */ -#define APDS990X_PILTL 0x08 /* Proximity interrupt low threshold low byte */ -#define APDS990X_PILTH 0x09 /* Proximity interrupt low threshold hi byte */ -#define APDS990X_PIHTL 0x0a /* Proximity interrupt hi threshold low byte */ -#define APDS990X_PIHTH 0x0b /* Proximity interrupt hi threshold hi byte */ -#define APDS990X_PERS 0x0c /* Interrupt persistence filters */ -#define APDS990X_CONFIG 0x0d /* Configuration */ -#define APDS990X_PPCOUNT 0x0e /* Proximity pulse count */ -#define APDS990X_CONTROL 0x0f /* Gain control register */ -#define APDS990X_REV 0x11 /* Revision Number */ -#define APDS990X_ID 0x12 /* Device ID */ -#define APDS990X_STATUS 0x13 /* Device status */ -#define APDS990X_CDATAL 0x14 /* Clear ADC low data register */ -#define APDS990X_CDATAH 0x15 /* Clear ADC high data register */ -#define APDS990X_IRDATAL 0x16 /* IR ADC low data register */ -#define APDS990X_IRDATAH 0x17 /* IR ADC high data register */ -#define APDS990X_PDATAL 0x18 /* Proximity ADC low data register */ -#define APDS990X_PDATAH 0x19 /* Proximity ADC high data register */ - -/* Control */ -#define APDS990X_MAX_AGAIN 3 - -/* Enable register */ -#define APDS990X_EN_PIEN (0x1 << 5) -#define APDS990X_EN_AIEN (0x1 << 4) -#define APDS990X_EN_WEN (0x1 << 3) -#define APDS990X_EN_PEN (0x1 << 2) -#define APDS990X_EN_AEN (0x1 << 1) -#define APDS990X_EN_PON (0x1 << 0) -#define APDS990X_EN_DISABLE_ALL 0 - -/* Status register */ -#define APDS990X_ST_PINT (0x1 << 5) -#define APDS990X_ST_AINT (0x1 << 4) - -/* I2C access types */ -#define APDS990x_CMD_TYPE_MASK (0x03 << 5) -#define APDS990x_CMD_TYPE_RB (0x00 << 5) /* Repeated byte */ -#define APDS990x_CMD_TYPE_INC (0x01 << 5) /* Auto increment */ -#define APDS990x_CMD_TYPE_SPE (0x03 << 5) /* Special function */ - -#define APDS990x_ADDR_SHIFT 0 -#define APDS990x_CMD 0x80 - -/* Interrupt ack commands */ -#define APDS990X_INT_ACK_ALS 0x6 -#define APDS990X_INT_ACK_PS 0x5 -#define APDS990X_INT_ACK_BOTH 0x7 - -/* ptime */ -#define APDS990X_PTIME_DEFAULT 0xff /* Recommended conversion time 2.7ms*/ - -/* wtime */ -#define APDS990X_WTIME_DEFAULT 0xee /* ~50ms wait time */ - -#define APDS990X_TIME_TO_ADC 1024 /* One timetick as ADC count value */ - -/* Persistence */ -#define APDS990X_APERS_SHIFT 0 -#define APDS990X_PPERS_SHIFT 4 - -/* Supported ID:s */ -#define APDS990X_ID_0 0x0 -#define APDS990X_ID_4 0x4 -#define APDS990X_ID_29 0x29 - -/* pgain and pdiode settings */ -#define APDS_PGAIN_1X 0x0 -#define APDS_PDIODE_IR 0x2 - -#define APDS990X_LUX_OUTPUT_SCALE 10 - -/* Reverse chip factors for threshold calculation */ -struct reverse_factors { - u32 afactor; - int cf1; - int irf1; - int cf2; - int irf2; -}; - -struct apds990x_chip { - struct apds990x_platform_data *pdata; - struct i2c_client *client; - struct mutex mutex; /* avoid parallel access */ - struct regulator_bulk_data regs[2]; - wait_queue_head_t wait; - - int prox_en; - bool prox_continuous_mode; - bool lux_wait_fresh_res; - - /* Chip parameters */ - struct apds990x_chip_factors cf; - struct reverse_factors rcf; - u16 atime; /* als integration time */ - u16 arate; /* als reporting rate */ - u16 a_max_result; /* Max possible ADC value with current atime */ - u8 again_meas; /* Gain used in last measurement */ - u8 again_next; /* Next calculated gain */ - u8 pgain; - u8 pdiode; - u8 pdrive; - u8 lux_persistence; - u8 prox_persistence; - - u32 lux_raw; - u32 lux; - u16 lux_clear; - u16 lux_ir; - u16 lux_calib; - u32 lux_thres_hi; - u32 lux_thres_lo; - - u32 prox_thres; - u16 prox_data; - u16 prox_calib; - - char chipname[10]; - u8 revision; -}; - -#define APDS_CALIB_SCALER 8192 -#define APDS_LUX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER) -#define APDS_PROX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER) - -#define APDS_PROX_DEF_THRES 600 -#define APDS_PROX_HYSTERESIS 50 -#define APDS_LUX_DEF_THRES_HI 101 -#define APDS_LUX_DEF_THRES_LO 100 -#define APDS_DEFAULT_PROX_PERS 1 - -#define APDS_TIMEOUT 2000 -#define APDS_STARTUP_DELAY 25000 /* us */ -#define APDS_RANGE 65535 -#define APDS_PROX_RANGE 1023 -#define APDS_LUX_GAIN_LO_LIMIT 100 -#define APDS_LUX_GAIN_LO_LIMIT_STRICT 25 - -#define TIMESTEP 87 /* 2.7ms is about 87 / 32 */ -#define TIME_STEP_SCALER 32 - -#define APDS_LUX_AVERAGING_TIME 50 /* tolerates 50/60Hz ripple */ -#define APDS_LUX_DEFAULT_RATE 200 - -static const u8 again[] = {1, 8, 16, 120}; /* ALS gain steps */ -static const u8 ir_currents[] = {100, 50, 25, 12}; /* IRled currents in mA */ - -/* Following two tables must match i.e 10Hz rate means 1 as persistence value */ -static const u16 arates_hz[] = {10, 5, 2, 1}; -static const u8 apersis[] = {1, 2, 4, 5}; - -/* Regulators */ -static const char reg_vcc[] = "Vdd"; -static const char reg_vled[] = "Vled"; - -static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data) -{ - struct i2c_client *client = chip->client; - s32 ret; - - reg &= ~APDS990x_CMD_TYPE_MASK; - reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB; - - ret = i2c_smbus_read_byte_data(client, reg); - *data = ret; - return (int)ret; -} - -static int apds990x_read_word(struct apds990x_chip *chip, u8 reg, u16 *data) -{ - struct i2c_client *client = chip->client; - s32 ret; - - reg &= ~APDS990x_CMD_TYPE_MASK; - reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC; - - ret = i2c_smbus_read_word_data(client, reg); - *data = ret; - return (int)ret; -} - -static int apds990x_write_byte(struct apds990x_chip *chip, u8 reg, u8 data) -{ - struct i2c_client *client = chip->client; - s32 ret; - - reg &= ~APDS990x_CMD_TYPE_MASK; - reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB; - - ret = i2c_smbus_write_byte_data(client, reg, data); - return (int)ret; -} - -static int apds990x_write_word(struct apds990x_chip *chip, u8 reg, u16 data) -{ - struct i2c_client *client = chip->client; - s32 ret; - - reg &= ~APDS990x_CMD_TYPE_MASK; - reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC; - - ret = i2c_smbus_write_word_data(client, reg, data); - return (int)ret; -} - -static int apds990x_mode_on(struct apds990x_chip *chip) -{ - /* ALS is mandatory, proximity optional */ - u8 reg = APDS990X_EN_AIEN | APDS990X_EN_PON | APDS990X_EN_AEN | - APDS990X_EN_WEN; - - if (chip->prox_en) - reg |= APDS990X_EN_PIEN | APDS990X_EN_PEN; - - return apds990x_write_byte(chip, APDS990X_ENABLE, reg); -} - -static u16 apds990x_lux_to_threshold(struct apds990x_chip *chip, u32 lux) -{ - u32 thres; - u32 cpl; - u32 ir; - - if (lux == 0) - return 0; - else if (lux == APDS_RANGE) - return APDS_RANGE; - - /* - * Reported LUX value is a combination of the IR and CLEAR channel - * values. However, interrupt threshold is only for clear channel. - * This function approximates needed HW threshold value for a given - * LUX value in the current lightning type. - * IR level compared to visible light varies heavily depending on the - * source of the light - * - * Calculate threshold value for the next measurement period. - * Math: threshold = lux * cpl where - * cpl = atime * again / (glass_attenuation * device_factor) - * (count-per-lux) - * - * First remove calibration. Division by four is to avoid overflow - */ - lux = lux * (APDS_CALIB_SCALER / 4) / (chip->lux_calib / 4); - - /* Multiplication by 64 is to increase accuracy */ - cpl = ((u32)chip->atime * (u32)again[chip->again_next] * - APDS_PARAM_SCALE * 64) / (chip->cf.ga * chip->cf.df); - - thres = lux * cpl / 64; - /* - * Convert IR light from the latest result to match with - * new gain step. This helps to adapt with the current - * source of light. - */ - ir = (u32)chip->lux_ir * (u32)again[chip->again_next] / - (u32)again[chip->again_meas]; - - /* - * Compensate count with IR light impact - * IAC1 > IAC2 (see apds990x_get_lux for formulas) - */ - if (chip->lux_clear * APDS_PARAM_SCALE >= - chip->rcf.afactor * chip->lux_ir) - thres = (chip->rcf.cf1 * thres + chip->rcf.irf1 * ir) / - APDS_PARAM_SCALE; - else - thres = (chip->rcf.cf2 * thres + chip->rcf.irf2 * ir) / - APDS_PARAM_SCALE; - - if (thres >= chip->a_max_result) - thres = chip->a_max_result - 1; - return thres; -} - -static inline int apds990x_set_atime(struct apds990x_chip *chip, u32 time_ms) -{ - u8 reg_value; - - chip->atime = time_ms; - /* Formula is specified in the data sheet */ - reg_value = 256 - ((time_ms * TIME_STEP_SCALER) / TIMESTEP); - /* Calculate max ADC value for given integration time */ - chip->a_max_result = (u16)(256 - reg_value) * APDS990X_TIME_TO_ADC; - return apds990x_write_byte(chip, APDS990X_ATIME, reg_value); -} - -/* Called always with mutex locked */ -static int apds990x_refresh_pthres(struct apds990x_chip *chip, int data) -{ - int ret, lo, hi; - - /* If the chip is not in use, don't try to access it */ - if (pm_runtime_suspended(&chip->client->dev)) - return 0; - - if (data < chip->prox_thres) { - lo = 0; - hi = chip->prox_thres; - } else { - lo = chip->prox_thres - APDS_PROX_HYSTERESIS; - if (chip->prox_continuous_mode) - hi = chip->prox_thres; - else - hi = APDS_RANGE; - } - - ret = apds990x_write_word(chip, APDS990X_PILTL, lo); - ret |= apds990x_write_word(chip, APDS990X_PIHTL, hi); - return ret; -} - -/* Called always with mutex locked */ -static int apds990x_refresh_athres(struct apds990x_chip *chip) -{ - int ret; - /* If the chip is not in use, don't try to access it */ - if (pm_runtime_suspended(&chip->client->dev)) - return 0; - - ret = apds990x_write_word(chip, APDS990X_AILTL, - apds990x_lux_to_threshold(chip, chip->lux_thres_lo)); - ret |= apds990x_write_word(chip, APDS990X_AIHTL, - apds990x_lux_to_threshold(chip, chip->lux_thres_hi)); - - return ret; -} - -/* Called always with mutex locked */ -static void apds990x_force_a_refresh(struct apds990x_chip *chip) -{ - /* This will force ALS interrupt after the next measurement. */ - apds990x_write_word(chip, APDS990X_AILTL, APDS_LUX_DEF_THRES_LO); - apds990x_write_word(chip, APDS990X_AIHTL, APDS_LUX_DEF_THRES_HI); -} - -/* Called always with mutex locked */ -static void apds990x_force_p_refresh(struct apds990x_chip *chip) -{ - /* This will force proximity interrupt after the next measurement. */ - apds990x_write_word(chip, APDS990X_PILTL, APDS_PROX_DEF_THRES - 1); - apds990x_write_word(chip, APDS990X_PIHTL, APDS_PROX_DEF_THRES); -} - -/* Called always with mutex locked */ -static int apds990x_calc_again(struct apds990x_chip *chip) -{ - int curr_again = chip->again_meas; - int next_again = chip->again_meas; - int ret = 0; - - /* Calculate suitable als gain */ - if (chip->lux_clear == chip->a_max_result) - next_again -= 2; /* ALS saturated. Decrease gain by 2 steps */ - else if (chip->lux_clear > chip->a_max_result / 2) - next_again--; - else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT) - next_again += 2; /* Too dark. Increase gain by 2 steps */ - else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT) - next_again++; - - /* Limit gain to available range */ - if (next_again < 0) - next_again = 0; - else if (next_again > APDS990X_MAX_AGAIN) - next_again = APDS990X_MAX_AGAIN; - - /* Let's check can we trust the measured result */ - if (chip->lux_clear == chip->a_max_result) - /* Result can be totally garbage due to saturation */ - ret = -ERANGE; - else if (next_again != curr_again && - chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT) - /* - * Gain is changed and measurement result is very small. - * Result can be totally garbage due to underflow - */ - ret = -ERANGE; - - chip->again_next = next_again; - apds990x_write_byte(chip, APDS990X_CONTROL, - (chip->pdrive << 6) | - (chip->pdiode << 4) | - (chip->pgain << 2) | - (chip->again_next << 0)); - - /* - * Error means bad result -> re-measurement is needed. The forced - * refresh uses fastest possible persistence setting to get result - * as soon as possible. - */ - if (ret < 0) - apds990x_force_a_refresh(chip); - else - apds990x_refresh_athres(chip); - - return ret; -} - -/* Called always with mutex locked */ -static int apds990x_get_lux(struct apds990x_chip *chip, int clear, int ir) -{ - int iac, iac1, iac2; /* IR adjusted counts */ - u32 lpc; /* Lux per count */ - - /* Formulas: - * iac1 = CF1 * CLEAR_CH - IRF1 * IR_CH - * iac2 = CF2 * CLEAR_CH - IRF2 * IR_CH - */ - iac1 = (chip->cf.cf1 * clear - chip->cf.irf1 * ir) / APDS_PARAM_SCALE; - iac2 = (chip->cf.cf2 * clear - chip->cf.irf2 * ir) / APDS_PARAM_SCALE; - - iac = max(iac1, iac2); - iac = max(iac, 0); - - lpc = APDS990X_LUX_OUTPUT_SCALE * (chip->cf.df * chip->cf.ga) / - (u32)(again[chip->again_meas] * (u32)chip->atime); - - return (iac * lpc) / APDS_PARAM_SCALE; -} - -static int apds990x_ack_int(struct apds990x_chip *chip, u8 mode) -{ - struct i2c_client *client = chip->client; - s32 ret; - u8 reg = APDS990x_CMD | APDS990x_CMD_TYPE_SPE; - - switch (mode & (APDS990X_ST_AINT | APDS990X_ST_PINT)) { - case APDS990X_ST_AINT: - reg |= APDS990X_INT_ACK_ALS; - break; - case APDS990X_ST_PINT: - reg |= APDS990X_INT_ACK_PS; - break; - default: - reg |= APDS990X_INT_ACK_BOTH; - break; - } - - ret = i2c_smbus_read_byte_data(client, reg); - return (int)ret; -} - -static irqreturn_t apds990x_irq(int irq, void *data) -{ - struct apds990x_chip *chip = data; - u8 status; - - apds990x_read_byte(chip, APDS990X_STATUS, &status); - apds990x_ack_int(chip, status); - - mutex_lock(&chip->mutex); - if (!pm_runtime_suspended(&chip->client->dev)) { - if (status & APDS990X_ST_AINT) { - apds990x_read_word(chip, APDS990X_CDATAL, - &chip->lux_clear); - apds990x_read_word(chip, APDS990X_IRDATAL, - &chip->lux_ir); - /* Store used gain for calculations */ - chip->again_meas = chip->again_next; - - chip->lux_raw = apds990x_get_lux(chip, - chip->lux_clear, - chip->lux_ir); - - if (apds990x_calc_again(chip) == 0) { - /* Result is valid */ - chip->lux = chip->lux_raw; - chip->lux_wait_fresh_res = false; - wake_up(&chip->wait); - sysfs_notify(&chip->client->dev.kobj, - NULL, "lux0_input"); - } - } - - if ((status & APDS990X_ST_PINT) && chip->prox_en) { - u16 clr_ch; - - apds990x_read_word(chip, APDS990X_CDATAL, &clr_ch); - /* - * If ALS channel is saturated at min gain, - * proximity gives false posivite values. - * Just ignore them. - */ - if (chip->again_meas == 0 && - clr_ch == chip->a_max_result) - chip->prox_data = 0; - else - apds990x_read_word(chip, - APDS990X_PDATAL, - &chip->prox_data); - - apds990x_refresh_pthres(chip, chip->prox_data); - if (chip->prox_data < chip->prox_thres) - chip->prox_data = 0; - else if (!chip->prox_continuous_mode) - chip->prox_data = APDS_PROX_RANGE; - sysfs_notify(&chip->client->dev.kobj, - NULL, "prox0_raw"); - } - } - mutex_unlock(&chip->mutex); - return IRQ_HANDLED; -} - -static int apds990x_configure(struct apds990x_chip *chip) -{ - /* It is recommended to use disabled mode during these operations */ - apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL); - - /* conversion and wait times for different state machince states */ - apds990x_write_byte(chip, APDS990X_PTIME, APDS990X_PTIME_DEFAULT); - apds990x_write_byte(chip, APDS990X_WTIME, APDS990X_WTIME_DEFAULT); - apds990x_set_atime(chip, APDS_LUX_AVERAGING_TIME); - - apds990x_write_byte(chip, APDS990X_CONFIG, 0); - - /* Persistence levels */ - apds990x_write_byte(chip, APDS990X_PERS, - (chip->lux_persistence << APDS990X_APERS_SHIFT) | - (chip->prox_persistence << APDS990X_PPERS_SHIFT)); - - apds990x_write_byte(chip, APDS990X_PPCOUNT, chip->pdata->ppcount); - - /* Start with relatively small gain */ - chip->again_meas = 1; - chip->again_next = 1; - apds990x_write_byte(chip, APDS990X_CONTROL, - (chip->pdrive << 6) | - (chip->pdiode << 4) | - (chip->pgain << 2) | - (chip->again_next << 0)); - return 0; -} - -static int apds990x_detect(struct apds990x_chip *chip) -{ - struct i2c_client *client = chip->client; - int ret; - u8 id; - - ret = apds990x_read_byte(chip, APDS990X_ID, &id); - if (ret < 0) { - dev_err(&client->dev, "ID read failed\n"); - return ret; - } - - ret = apds990x_read_byte(chip, APDS990X_REV, &chip->revision); - if (ret < 0) { - dev_err(&client->dev, "REV read failed\n"); - return ret; - } - - switch (id) { - case APDS990X_ID_0: - case APDS990X_ID_4: - case APDS990X_ID_29: - snprintf(chip->chipname, sizeof(chip->chipname), "APDS-990x"); - break; - default: - ret = -ENODEV; - break; - } - return ret; -} - -#if defined(CONFIG_PM) || defined(CONFIG_PM_RUNTIME) -static int apds990x_chip_on(struct apds990x_chip *chip) -{ - int err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), - chip->regs); - if (err < 0) - return err; - - usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY); - - /* Refresh all configs in case of regulators were off */ - chip->prox_data = 0; - apds990x_configure(chip); - apds990x_mode_on(chip); - return 0; -} -#endif - -static int apds990x_chip_off(struct apds990x_chip *chip) -{ - apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL); - regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); - return 0; -} - -static ssize_t apds990x_lux_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - ssize_t ret; - u32 result; - long timeout; - - if (pm_runtime_suspended(dev)) - return -EIO; - - timeout = wait_event_interruptible_timeout(chip->wait, - !chip->lux_wait_fresh_res, - msecs_to_jiffies(APDS_TIMEOUT)); - if (!timeout) - return -EIO; - - mutex_lock(&chip->mutex); - result = (chip->lux * chip->lux_calib) / APDS_CALIB_SCALER; - if (result > (APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE)) - result = APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE; - - ret = sprintf(buf, "%d.%d\n", - result / APDS990X_LUX_OUTPUT_SCALE, - result % APDS990X_LUX_OUTPUT_SCALE); - mutex_unlock(&chip->mutex); - return ret; -} - -static DEVICE_ATTR(lux0_input, S_IRUGO, apds990x_lux_show, NULL); - -static ssize_t apds990x_lux_range_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%u\n", APDS_RANGE); -} - -static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, apds990x_lux_range_show, NULL); - -static ssize_t apds990x_lux_calib_format_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%u\n", APDS_CALIB_SCALER); -} - -static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, - apds990x_lux_calib_format_show, NULL); - -static ssize_t apds990x_lux_calib_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - - return sprintf(buf, "%u\n", chip->lux_calib); -} - -static ssize_t apds990x_lux_calib_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - unsigned long value; - - if (strict_strtoul(buf, 0, &value)) - return -EINVAL; - - if (chip->lux_calib > APDS_RANGE) - return -EINVAL; - - chip->lux_calib = value; - - return len; -} - -static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, apds990x_lux_calib_show, - apds990x_lux_calib_store); - -static ssize_t apds990x_rate_avail(struct device *dev, - struct device_attribute *attr, char *buf) -{ - int i; - int pos = 0; - for (i = 0; i < ARRAY_SIZE(arates_hz); i++) - pos += sprintf(buf + pos, "%d ", arates_hz[i]); - sprintf(buf + pos - 1, "\n"); - return pos; -} - -static ssize_t apds990x_rate_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%d\n", chip->arate); -} - -static int apds990x_set_arate(struct apds990x_chip *chip, int rate) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(arates_hz); i++) - if (rate >= arates_hz[i]) - break; - - if (i == ARRAY_SIZE(arates_hz)) - return -EINVAL; - - /* Pick up corresponding persistence value */ - chip->lux_persistence = apersis[i]; - chip->arate = arates_hz[i]; - - /* If the chip is not in use, don't try to access it */ - if (pm_runtime_suspended(&chip->client->dev)) - return 0; - - /* Persistence levels */ - return apds990x_write_byte(chip, APDS990X_PERS, - (chip->lux_persistence << APDS990X_APERS_SHIFT) | - (chip->prox_persistence << APDS990X_PPERS_SHIFT)); -} - -static ssize_t apds990x_rate_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - unsigned long value; - int ret; - - if (strict_strtoul(buf, 0, &value)) - return -EINVAL; - - mutex_lock(&chip->mutex); - ret = apds990x_set_arate(chip, value); - mutex_unlock(&chip->mutex); - - if (ret < 0) - return ret; - return len; -} - -static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, apds990x_rate_avail, NULL); - -static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, apds990x_rate_show, - apds990x_rate_store); - -static ssize_t apds990x_prox_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - ssize_t ret; - struct apds990x_chip *chip = dev_get_drvdata(dev); - if (pm_runtime_suspended(dev) || !chip->prox_en) - return -EIO; - - mutex_lock(&chip->mutex); - ret = sprintf(buf, "%d\n", chip->prox_data); - mutex_unlock(&chip->mutex); - return ret; -} - -static DEVICE_ATTR(prox0_raw, S_IRUGO, apds990x_prox_show, NULL); - -static ssize_t apds990x_prox_range_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%u\n", APDS_PROX_RANGE); -} - -static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, apds990x_prox_range_show, NULL); - -static ssize_t apds990x_prox_enable_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%d\n", chip->prox_en); -} - -static ssize_t apds990x_prox_enable_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - unsigned long value; - - if (strict_strtoul(buf, 0, &value)) - return -EINVAL; - - mutex_lock(&chip->mutex); - - if (!chip->prox_en) - chip->prox_data = 0; - - if (value) - chip->prox_en++; - else if (chip->prox_en > 0) - chip->prox_en--; - - if (!pm_runtime_suspended(dev)) - apds990x_mode_on(chip); - mutex_unlock(&chip->mutex); - return len; -} - -static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, apds990x_prox_enable_show, - apds990x_prox_enable_store); - -static const char reporting_modes[][9] = {"trigger", "periodic"}; - -static ssize_t apds990x_prox_reporting_mode_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%s\n", - reporting_modes[!!chip->prox_continuous_mode]); -} - -static ssize_t apds990x_prox_reporting_mode_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - - if (sysfs_streq(buf, reporting_modes[0])) - chip->prox_continuous_mode = 0; - else if (sysfs_streq(buf, reporting_modes[1])) - chip->prox_continuous_mode = 1; - else - return -EINVAL; - return len; -} - -static DEVICE_ATTR(prox0_reporting_mode, S_IRUGO | S_IWUSR, - apds990x_prox_reporting_mode_show, - apds990x_prox_reporting_mode_store); - -static ssize_t apds990x_prox_reporting_avail_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%s %s\n", reporting_modes[0], reporting_modes[1]); -} - -static DEVICE_ATTR(prox0_reporting_mode_avail, S_IRUGO | S_IWUSR, - apds990x_prox_reporting_avail_show, NULL); - - -static ssize_t apds990x_lux_thresh_above_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%d\n", chip->lux_thres_hi); -} - -static ssize_t apds990x_lux_thresh_below_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%d\n", chip->lux_thres_lo); -} - -static ssize_t apds990x_set_lux_thresh(struct apds990x_chip *chip, u32 *target, - const char *buf) -{ - int ret = 0; - unsigned long thresh; - - if (strict_strtoul(buf, 0, &thresh)) - return -EINVAL; - - if (thresh > APDS_RANGE) - return -EINVAL; - - mutex_lock(&chip->mutex); - *target = thresh; - /* - * Don't update values in HW if we are still waiting for - * first interrupt to come after device handle open call. - */ - if (!chip->lux_wait_fresh_res) - apds990x_refresh_athres(chip); - mutex_unlock(&chip->mutex); - return ret; - -} - -static ssize_t apds990x_lux_thresh_above_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_hi, buf); - if (ret < 0) - return ret; - return len; -} - -static ssize_t apds990x_lux_thresh_below_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_lo, buf); - if (ret < 0) - return ret; - return len; -} - -static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, - apds990x_lux_thresh_above_show, - apds990x_lux_thresh_above_store); - -static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, - apds990x_lux_thresh_below_show, - apds990x_lux_thresh_below_store); - -static ssize_t apds990x_prox_threshold_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%d\n", chip->prox_thres); -} - -static ssize_t apds990x_prox_threshold_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - unsigned long value; - - if (strict_strtoul(buf, 0, &value)) - return -EINVAL; - - if ((value > APDS_RANGE) || (value == 0) || - (value < APDS_PROX_HYSTERESIS)) - return -EINVAL; - - mutex_lock(&chip->mutex); - chip->prox_thres = value; - - apds990x_force_p_refresh(chip); - mutex_unlock(&chip->mutex); - return len; -} - -static DEVICE_ATTR(prox0_thresh_above_value, S_IRUGO | S_IWUSR, - apds990x_prox_threshold_show, - apds990x_prox_threshold_store); - -static ssize_t apds990x_power_state_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); - return 0; -} - -static ssize_t apds990x_power_state_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - unsigned long value; - - if (strict_strtoul(buf, 0, &value)) - return -EINVAL; - if (value) { - pm_runtime_get_sync(dev); - mutex_lock(&chip->mutex); - chip->lux_wait_fresh_res = true; - apds990x_force_a_refresh(chip); - apds990x_force_p_refresh(chip); - mutex_unlock(&chip->mutex); - } else { - if (!pm_runtime_suspended(dev)) - pm_runtime_put(dev); - } - return len; -} - -static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, - apds990x_power_state_show, - apds990x_power_state_store); - -static ssize_t apds990x_chip_id_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct apds990x_chip *chip = dev_get_drvdata(dev); - return sprintf(buf, "%s %d\n", chip->chipname, chip->revision); -} - -static DEVICE_ATTR(chip_id, S_IRUGO, apds990x_chip_id_show, NULL); - -static struct attribute *sysfs_attrs_ctrl[] = { - &dev_attr_lux0_calibscale.attr, - &dev_attr_lux0_calibscale_default.attr, - &dev_attr_lux0_input.attr, - &dev_attr_lux0_sensor_range.attr, - &dev_attr_lux0_rate.attr, - &dev_attr_lux0_rate_avail.attr, - &dev_attr_lux0_thresh_above_value.attr, - &dev_attr_lux0_thresh_below_value.attr, - &dev_attr_prox0_raw_en.attr, - &dev_attr_prox0_raw.attr, - &dev_attr_prox0_sensor_range.attr, - &dev_attr_prox0_thresh_above_value.attr, - &dev_attr_prox0_reporting_mode.attr, - &dev_attr_prox0_reporting_mode_avail.attr, - &dev_attr_chip_id.attr, - &dev_attr_power_state.attr, - NULL -}; - -static struct attribute_group apds990x_attribute_group[] = { - {.attrs = sysfs_attrs_ctrl }, -}; - -static int __devinit apds990x_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct apds990x_chip *chip; - int err; - - chip = kzalloc(sizeof *chip, GFP_KERNEL); - if (!chip) - return -ENOMEM; - - i2c_set_clientdata(client, chip); - chip->client = client; - - init_waitqueue_head(&chip->wait); - mutex_init(&chip->mutex); - chip->pdata = client->dev.platform_data; - - if (chip->pdata == NULL) { - dev_err(&client->dev, "platform data is mandatory\n"); - err = -EINVAL; - goto fail1; - } - - if (chip->pdata->cf.ga == 0) { - /* set uncovered sensor default parameters */ - chip->cf.ga = 1966; /* 0.48 * APDS_PARAM_SCALE */ - chip->cf.cf1 = 4096; /* 1.00 * APDS_PARAM_SCALE */ - chip->cf.irf1 = 9134; /* 2.23 * APDS_PARAM_SCALE */ - chip->cf.cf2 = 2867; /* 0.70 * APDS_PARAM_SCALE */ - chip->cf.irf2 = 5816; /* 1.42 * APDS_PARAM_SCALE */ - chip->cf.df = 52; - } else { - chip->cf = chip->pdata->cf; - } - - /* precalculate inverse chip factors for threshold control */ - chip->rcf.afactor = - (chip->cf.irf1 - chip->cf.irf2) * APDS_PARAM_SCALE / - (chip->cf.cf1 - chip->cf.cf2); - chip->rcf.cf1 = APDS_PARAM_SCALE * APDS_PARAM_SCALE / - chip->cf.cf1; - chip->rcf.irf1 = chip->cf.irf1 * APDS_PARAM_SCALE / - chip->cf.cf1; - chip->rcf.cf2 = APDS_PARAM_SCALE * APDS_PARAM_SCALE / - chip->cf.cf2; - chip->rcf.irf2 = chip->cf.irf2 * APDS_PARAM_SCALE / - chip->cf.cf2; - - /* Set something to start with */ - chip->lux_thres_hi = APDS_LUX_DEF_THRES_HI; - chip->lux_thres_lo = APDS_LUX_DEF_THRES_LO; - chip->lux_calib = APDS_LUX_NEUTRAL_CALIB_VALUE; - - chip->prox_thres = APDS_PROX_DEF_THRES; - chip->pdrive = chip->pdata->pdrive; - chip->pdiode = APDS_PDIODE_IR; - chip->pgain = APDS_PGAIN_1X; - chip->prox_calib = APDS_PROX_NEUTRAL_CALIB_VALUE; - chip->prox_persistence = APDS_DEFAULT_PROX_PERS; - chip->prox_continuous_mode = false; - - chip->regs[0].supply = reg_vcc; - chip->regs[1].supply = reg_vled; - - err = regulator_bulk_get(&client->dev, - ARRAY_SIZE(chip->regs), chip->regs); - if (err < 0) { - dev_err(&client->dev, "Cannot get regulators\n"); - goto fail1; - } - - err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), chip->regs); - if (err < 0) { - dev_err(&client->dev, "Cannot enable regulators\n"); - goto fail2; - } - - usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY); - - err = apds990x_detect(chip); - if (err < 0) { - dev_err(&client->dev, "APDS990X not found\n"); - goto fail3; - } - - pm_runtime_set_active(&client->dev); - - apds990x_configure(chip); - apds990x_set_arate(chip, APDS_LUX_DEFAULT_RATE); - apds990x_mode_on(chip); - - pm_runtime_enable(&client->dev); - - if (chip->pdata->setup_resources) { - err = chip->pdata->setup_resources(); - if (err) { - err = -EINVAL; - goto fail3; - } - } - - err = sysfs_create_group(&chip->client->dev.kobj, - apds990x_attribute_group); - if (err < 0) { - dev_err(&chip->client->dev, "Sysfs registration failed\n"); - goto fail4; - } - - err = request_threaded_irq(client->irq, NULL, - apds990x_irq, - IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW | - IRQF_ONESHOT, - "apds990x", chip); - if (err) { - dev_err(&client->dev, "could not get IRQ %d\n", - client->irq); - goto fail5; - } - return err; -fail5: - sysfs_remove_group(&chip->client->dev.kobj, - &apds990x_attribute_group[0]); -fail4: - if (chip->pdata && chip->pdata->release_resources) - chip->pdata->release_resources(); -fail3: - regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); -fail2: - regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs); -fail1: - kfree(chip); - return err; -} - -static int __devexit apds990x_remove(struct i2c_client *client) -{ - struct apds990x_chip *chip = i2c_get_clientdata(client); - - free_irq(client->irq, chip); - sysfs_remove_group(&chip->client->dev.kobj, - apds990x_attribute_group); - - if (chip->pdata && chip->pdata->release_resources) - chip->pdata->release_resources(); - - if (!pm_runtime_suspended(&client->dev)) - apds990x_chip_off(chip); - - pm_runtime_disable(&client->dev); - pm_runtime_set_suspended(&client->dev); - - regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs); - - kfree(chip); - return 0; -} - -#ifdef CONFIG_PM -static int apds990x_suspend(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct apds990x_chip *chip = i2c_get_clientdata(client); - - apds990x_chip_off(chip); - return 0; -} - -static int apds990x_resume(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct apds990x_chip *chip = i2c_get_clientdata(client); - - /* - * If we were enabled at suspend time, it is expected - * everything works nice and smoothly. Chip_on is enough - */ - apds990x_chip_on(chip); - - return 0; -} -#else -#define apds990x_suspend NULL -#define apds990x_resume NULL -#define apds990x_shutdown NULL -#endif - -#ifdef CONFIG_PM_RUNTIME -static int apds990x_runtime_suspend(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct apds990x_chip *chip = i2c_get_clientdata(client); - - apds990x_chip_off(chip); - return 0; -} - -static int apds990x_runtime_resume(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct apds990x_chip *chip = i2c_get_clientdata(client); - - apds990x_chip_on(chip); - return 0; -} - -#endif - -static const struct i2c_device_id apds990x_id[] = { - {"apds990x", 0 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, apds990x_id); - -static const struct dev_pm_ops apds990x_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(apds990x_suspend, apds990x_resume) - SET_RUNTIME_PM_OPS(apds990x_runtime_suspend, - apds990x_runtime_resume, - NULL) -}; - -static struct i2c_driver apds990x_driver = { - .driver = { - .name = "apds990x", - .owner = THIS_MODULE, - .pm = &apds990x_pm_ops, - }, - .probe = apds990x_probe, - .remove = __devexit_p(apds990x_remove), - .id_table = apds990x_id, -}; - -module_i2c_driver(apds990x_driver); - -MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor"); -MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); -MODULE_LICENSE("GPL v2"); |