| /* |
| * drivers/i2c/chips/tsl2563.c |
| * |
| * Copyright (C) 2008 Nokia Corporation |
| * |
| * Written by Timo O. Karjalainen <timo.o.karjalainen@nokia.com> |
| * Contact: Amit Kucheria <amit.kucheria@verdurent.com> |
| * |
| * Converted to IIO driver |
| * Amit Kucheria <amit.kucheria@verdurent.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/module.h> |
| #include <linux/i2c.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/sched.h> |
| #include <linux/mutex.h> |
| #include <linux/delay.h> |
| #include <linux/pm.h> |
| #include <linux/err.h> |
| #include <linux/slab.h> |
| |
| #include "../iio.h" |
| #include "../sysfs.h" |
| #include "../events.h" |
| #include "tsl2563.h" |
| |
| /* Use this many bits for fraction part. */ |
| #define ADC_FRAC_BITS (14) |
| |
| /* Given number of 1/10000's in ADC_FRAC_BITS precision. */ |
| #define FRAC10K(f) (((f) * (1L << (ADC_FRAC_BITS))) / (10000)) |
| |
| /* Bits used for fraction in calibration coefficients.*/ |
| #define CALIB_FRAC_BITS (10) |
| /* 0.5 in CALIB_FRAC_BITS precision */ |
| #define CALIB_FRAC_HALF (1 << (CALIB_FRAC_BITS - 1)) |
| /* Make a fraction from a number n that was multiplied with b. */ |
| #define CALIB_FRAC(n, b) (((n) << CALIB_FRAC_BITS) / (b)) |
| /* Decimal 10^(digits in sysfs presentation) */ |
| #define CALIB_BASE_SYSFS (1000) |
| |
| #define TSL2563_CMD (0x80) |
| #define TSL2563_CLEARINT (0x40) |
| |
| #define TSL2563_REG_CTRL (0x00) |
| #define TSL2563_REG_TIMING (0x01) |
| #define TSL2563_REG_LOWLOW (0x02) /* data0 low threshold, 2 bytes */ |
| #define TSL2563_REG_LOWHIGH (0x03) |
| #define TSL2563_REG_HIGHLOW (0x04) /* data0 high threshold, 2 bytes */ |
| #define TSL2563_REG_HIGHHIGH (0x05) |
| #define TSL2563_REG_INT (0x06) |
| #define TSL2563_REG_ID (0x0a) |
| #define TSL2563_REG_DATA0LOW (0x0c) /* broadband sensor value, 2 bytes */ |
| #define TSL2563_REG_DATA0HIGH (0x0d) |
| #define TSL2563_REG_DATA1LOW (0x0e) /* infrared sensor value, 2 bytes */ |
| #define TSL2563_REG_DATA1HIGH (0x0f) |
| |
| #define TSL2563_CMD_POWER_ON (0x03) |
| #define TSL2563_CMD_POWER_OFF (0x00) |
| #define TSL2563_CTRL_POWER_MASK (0x03) |
| |
| #define TSL2563_TIMING_13MS (0x00) |
| #define TSL2563_TIMING_100MS (0x01) |
| #define TSL2563_TIMING_400MS (0x02) |
| #define TSL2563_TIMING_MASK (0x03) |
| #define TSL2563_TIMING_GAIN16 (0x10) |
| #define TSL2563_TIMING_GAIN1 (0x00) |
| |
| #define TSL2563_INT_DISBLED (0x00) |
| #define TSL2563_INT_LEVEL (0x10) |
| #define TSL2563_INT_PERSIST(n) ((n) & 0x0F) |
| |
| struct tsl2563_gainlevel_coeff { |
| u8 gaintime; |
| u16 min; |
| u16 max; |
| }; |
| |
| static const struct tsl2563_gainlevel_coeff tsl2563_gainlevel_table[] = { |
| { |
| .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN16, |
| .min = 0, |
| .max = 65534, |
| }, { |
| .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN1, |
| .min = 2048, |
| .max = 65534, |
| }, { |
| .gaintime = TSL2563_TIMING_100MS | TSL2563_TIMING_GAIN1, |
| .min = 4095, |
| .max = 37177, |
| }, { |
| .gaintime = TSL2563_TIMING_13MS | TSL2563_TIMING_GAIN1, |
| .min = 3000, |
| .max = 65535, |
| }, |
| }; |
| |
| struct tsl2563_chip { |
| struct mutex lock; |
| struct i2c_client *client; |
| struct delayed_work poweroff_work; |
| |
| /* Remember state for suspend and resume functions */ |
| bool suspended; |
| |
| struct tsl2563_gainlevel_coeff const *gainlevel; |
| |
| u16 low_thres; |
| u16 high_thres; |
| u8 intr; |
| bool int_enabled; |
| |
| /* Calibration coefficients */ |
| u32 calib0; |
| u32 calib1; |
| int cover_comp_gain; |
| |
| /* Cache current values, to be returned while suspended */ |
| u32 data0; |
| u32 data1; |
| }; |
| |
| static int tsl2563_set_power(struct tsl2563_chip *chip, int on) |
| { |
| struct i2c_client *client = chip->client; |
| u8 cmd; |
| |
| cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF; |
| return i2c_smbus_write_byte_data(client, |
| TSL2563_CMD | TSL2563_REG_CTRL, cmd); |
| } |
| |
| /* |
| * Return value is 0 for off, 1 for on, or a negative error |
| * code if reading failed. |
| */ |
| static int tsl2563_get_power(struct tsl2563_chip *chip) |
| { |
| struct i2c_client *client = chip->client; |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_CTRL); |
| if (ret < 0) |
| return ret; |
| |
| return (ret & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON; |
| } |
| |
| static int tsl2563_configure(struct tsl2563_chip *chip) |
| { |
| int ret; |
| |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_TIMING, |
| chip->gainlevel->gaintime); |
| if (ret) |
| goto error_ret; |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_HIGHLOW, |
| chip->high_thres & 0xFF); |
| if (ret) |
| goto error_ret; |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_HIGHHIGH, |
| (chip->high_thres >> 8) & 0xFF); |
| if (ret) |
| goto error_ret; |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_LOWLOW, |
| chip->low_thres & 0xFF); |
| if (ret) |
| goto error_ret; |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_LOWHIGH, |
| (chip->low_thres >> 8) & 0xFF); |
| /* Interrupt register is automatically written anyway if it is relevant |
| so is not here */ |
| error_ret: |
| return ret; |
| } |
| |
| static void tsl2563_poweroff_work(struct work_struct *work) |
| { |
| struct tsl2563_chip *chip = |
| container_of(work, struct tsl2563_chip, poweroff_work.work); |
| tsl2563_set_power(chip, 0); |
| } |
| |
| static int tsl2563_detect(struct tsl2563_chip *chip) |
| { |
| int ret; |
| |
| ret = tsl2563_set_power(chip, 1); |
| if (ret) |
| return ret; |
| |
| ret = tsl2563_get_power(chip); |
| if (ret < 0) |
| return ret; |
| |
| return ret ? 0 : -ENODEV; |
| } |
| |
| static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id) |
| { |
| struct i2c_client *client = chip->client; |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID); |
| if (ret < 0) |
| return ret; |
| |
| *id = ret; |
| |
| return 0; |
| } |
| |
| /* |
| * "Normalized" ADC value is one obtained with 400ms of integration time and |
| * 16x gain. This function returns the number of bits of shift needed to |
| * convert between normalized values and HW values obtained using given |
| * timing and gain settings. |
| */ |
| static int adc_shiftbits(u8 timing) |
| { |
| int shift = 0; |
| |
| switch (timing & TSL2563_TIMING_MASK) { |
| case TSL2563_TIMING_13MS: |
| shift += 5; |
| break; |
| case TSL2563_TIMING_100MS: |
| shift += 2; |
| break; |
| case TSL2563_TIMING_400MS: |
| /* no-op */ |
| break; |
| } |
| |
| if (!(timing & TSL2563_TIMING_GAIN16)) |
| shift += 4; |
| |
| return shift; |
| } |
| |
| /* Convert a HW ADC value to normalized scale. */ |
| static u32 normalize_adc(u16 adc, u8 timing) |
| { |
| return adc << adc_shiftbits(timing); |
| } |
| |
| static void tsl2563_wait_adc(struct tsl2563_chip *chip) |
| { |
| unsigned int delay; |
| |
| switch (chip->gainlevel->gaintime & TSL2563_TIMING_MASK) { |
| case TSL2563_TIMING_13MS: |
| delay = 14; |
| break; |
| case TSL2563_TIMING_100MS: |
| delay = 101; |
| break; |
| default: |
| delay = 402; |
| } |
| /* |
| * TODO: Make sure that we wait at least required delay but why we |
| * have to extend it one tick more? |
| */ |
| schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2); |
| } |
| |
| static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc) |
| { |
| struct i2c_client *client = chip->client; |
| |
| if (adc > chip->gainlevel->max || adc < chip->gainlevel->min) { |
| |
| (adc > chip->gainlevel->max) ? |
| chip->gainlevel++ : chip->gainlevel--; |
| |
| i2c_smbus_write_byte_data(client, |
| TSL2563_CMD | TSL2563_REG_TIMING, |
| chip->gainlevel->gaintime); |
| |
| tsl2563_wait_adc(chip); |
| tsl2563_wait_adc(chip); |
| |
| return 1; |
| } else |
| return 0; |
| } |
| |
| static int tsl2563_get_adc(struct tsl2563_chip *chip) |
| { |
| struct i2c_client *client = chip->client; |
| u16 adc0, adc1; |
| int retry = 1; |
| int ret = 0; |
| |
| if (chip->suspended) |
| goto out; |
| |
| if (!chip->int_enabled) { |
| cancel_delayed_work(&chip->poweroff_work); |
| |
| if (!tsl2563_get_power(chip)) { |
| ret = tsl2563_set_power(chip, 1); |
| if (ret) |
| goto out; |
| ret = tsl2563_configure(chip); |
| if (ret) |
| goto out; |
| tsl2563_wait_adc(chip); |
| } |
| } |
| |
| while (retry) { |
| ret = i2c_smbus_read_word_data(client, |
| TSL2563_CMD | TSL2563_REG_DATA0LOW); |
| if (ret < 0) |
| goto out; |
| adc0 = ret; |
| |
| ret = i2c_smbus_read_word_data(client, |
| TSL2563_CMD | TSL2563_REG_DATA1LOW); |
| if (ret < 0) |
| goto out; |
| adc1 = ret; |
| |
| retry = tsl2563_adjust_gainlevel(chip, adc0); |
| } |
| |
| chip->data0 = normalize_adc(adc0, chip->gainlevel->gaintime); |
| chip->data1 = normalize_adc(adc1, chip->gainlevel->gaintime); |
| |
| if (!chip->int_enabled) |
| schedule_delayed_work(&chip->poweroff_work, 5 * HZ); |
| |
| ret = 0; |
| out: |
| return ret; |
| } |
| |
| static inline int calib_to_sysfs(u32 calib) |
| { |
| return (int) (((calib * CALIB_BASE_SYSFS) + |
| CALIB_FRAC_HALF) >> CALIB_FRAC_BITS); |
| } |
| |
| static inline u32 calib_from_sysfs(int value) |
| { |
| return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS; |
| } |
| |
| /* |
| * Conversions between lux and ADC values. |
| * |
| * The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are |
| * appropriate constants. Different constants are needed for different |
| * kinds of light, determined by the ratio adc1/adc0 (basically the ratio |
| * of the intensities in infrared and visible wavelengths). lux_table below |
| * lists the upper threshold of the adc1/adc0 ratio and the corresponding |
| * constants. |
| */ |
| |
| struct tsl2563_lux_coeff { |
| unsigned long ch_ratio; |
| unsigned long ch0_coeff; |
| unsigned long ch1_coeff; |
| }; |
| |
| static const struct tsl2563_lux_coeff lux_table[] = { |
| { |
| .ch_ratio = FRAC10K(1300), |
| .ch0_coeff = FRAC10K(315), |
| .ch1_coeff = FRAC10K(262), |
| }, { |
| .ch_ratio = FRAC10K(2600), |
| .ch0_coeff = FRAC10K(337), |
| .ch1_coeff = FRAC10K(430), |
| }, { |
| .ch_ratio = FRAC10K(3900), |
| .ch0_coeff = FRAC10K(363), |
| .ch1_coeff = FRAC10K(529), |
| }, { |
| .ch_ratio = FRAC10K(5200), |
| .ch0_coeff = FRAC10K(392), |
| .ch1_coeff = FRAC10K(605), |
| }, { |
| .ch_ratio = FRAC10K(6500), |
| .ch0_coeff = FRAC10K(229), |
| .ch1_coeff = FRAC10K(291), |
| }, { |
| .ch_ratio = FRAC10K(8000), |
| .ch0_coeff = FRAC10K(157), |
| .ch1_coeff = FRAC10K(180), |
| }, { |
| .ch_ratio = FRAC10K(13000), |
| .ch0_coeff = FRAC10K(34), |
| .ch1_coeff = FRAC10K(26), |
| }, { |
| .ch_ratio = ULONG_MAX, |
| .ch0_coeff = 0, |
| .ch1_coeff = 0, |
| }, |
| }; |
| |
| /* |
| * Convert normalized, scaled ADC values to lux. |
| */ |
| static unsigned int adc_to_lux(u32 adc0, u32 adc1) |
| { |
| const struct tsl2563_lux_coeff *lp = lux_table; |
| unsigned long ratio, lux, ch0 = adc0, ch1 = adc1; |
| |
| ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX; |
| |
| while (lp->ch_ratio < ratio) |
| lp++; |
| |
| lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff; |
| |
| return (unsigned int) (lux >> ADC_FRAC_BITS); |
| } |
| |
| /*--------------------------------------------------------------*/ |
| /* Sysfs interface */ |
| /*--------------------------------------------------------------*/ |
| |
| |
| /* Apply calibration coefficient to ADC count. */ |
| static u32 calib_adc(u32 adc, u32 calib) |
| { |
| unsigned long scaled = adc; |
| |
| scaled *= calib; |
| scaled >>= CALIB_FRAC_BITS; |
| |
| return (u32) scaled; |
| } |
| |
| static int tsl2563_write_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| int val, |
| int val2, |
| long mask) |
| { |
| struct tsl2563_chip *chip = iio_priv(indio_dev); |
| |
| if (chan->channel == IIO_MOD_LIGHT_BOTH) |
| chip->calib0 = calib_from_sysfs(val); |
| else |
| chip->calib1 = calib_from_sysfs(val); |
| |
| return 0; |
| } |
| |
| static int tsl2563_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| int *val, |
| int *val2, |
| long m) |
| { |
| int ret = -EINVAL; |
| u32 calib0, calib1; |
| struct tsl2563_chip *chip = iio_priv(indio_dev); |
| |
| mutex_lock(&chip->lock); |
| switch (m) { |
| case IIO_CHAN_INFO_RAW: |
| case IIO_CHAN_INFO_PROCESSED: |
| switch (chan->type) { |
| case IIO_LIGHT: |
| ret = tsl2563_get_adc(chip); |
| if (ret) |
| goto error_ret; |
| calib0 = calib_adc(chip->data0, chip->calib0) * |
| chip->cover_comp_gain; |
| calib1 = calib_adc(chip->data1, chip->calib1) * |
| chip->cover_comp_gain; |
| *val = adc_to_lux(calib0, calib1); |
| ret = IIO_VAL_INT; |
| break; |
| case IIO_INTENSITY: |
| ret = tsl2563_get_adc(chip); |
| if (ret) |
| goto error_ret; |
| if (chan->channel == 0) |
| *val = chip->data0; |
| else |
| *val = chip->data1; |
| ret = IIO_VAL_INT; |
| break; |
| default: |
| break; |
| } |
| break; |
| |
| case IIO_CHAN_INFO_CALIBSCALE: |
| if (chan->channel == 0) |
| *val = calib_to_sysfs(chip->calib0); |
| else |
| *val = calib_to_sysfs(chip->calib1); |
| ret = IIO_VAL_INT; |
| break; |
| default: |
| ret = -EINVAL; |
| goto error_ret; |
| } |
| |
| error_ret: |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static const struct iio_chan_spec tsl2563_channels[] = { |
| { |
| .type = IIO_LIGHT, |
| .indexed = 1, |
| .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT, |
| .channel = 0, |
| }, { |
| .type = IIO_INTENSITY, |
| .modified = 1, |
| .channel2 = IIO_MOD_LIGHT_BOTH, |
| .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | |
| IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, |
| .event_mask = (IIO_EV_BIT(IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_RISING) | |
| IIO_EV_BIT(IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_FALLING)), |
| }, { |
| .type = IIO_INTENSITY, |
| .modified = 1, |
| .channel2 = IIO_MOD_LIGHT_IR, |
| .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | |
| IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, |
| } |
| }; |
| |
| static int tsl2563_read_thresh(struct iio_dev *indio_dev, |
| u64 event_code, |
| int *val) |
| { |
| struct tsl2563_chip *chip = iio_priv(indio_dev); |
| |
| switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { |
| case IIO_EV_DIR_RISING: |
| *val = chip->high_thres; |
| break; |
| case IIO_EV_DIR_FALLING: |
| *val = chip->low_thres; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int tsl2563_write_thresh(struct iio_dev *indio_dev, |
| u64 event_code, |
| int val) |
| { |
| struct tsl2563_chip *chip = iio_priv(indio_dev); |
| int ret; |
| u8 address; |
| |
| if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING) |
| address = TSL2563_REG_HIGHLOW; |
| else |
| address = TSL2563_REG_LOWLOW; |
| mutex_lock(&chip->lock); |
| ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address, |
| val & 0xFF); |
| if (ret) |
| goto error_ret; |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | (address + 1), |
| (val >> 8) & 0xFF); |
| if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING) |
| chip->high_thres = val; |
| else |
| chip->low_thres = val; |
| |
| error_ret: |
| mutex_unlock(&chip->lock); |
| |
| return ret; |
| } |
| |
| static irqreturn_t tsl2563_event_handler(int irq, void *private) |
| { |
| struct iio_dev *dev_info = private; |
| struct tsl2563_chip *chip = iio_priv(dev_info); |
| |
| iio_push_event(dev_info, |
| IIO_UNMOD_EVENT_CODE(IIO_LIGHT, |
| 0, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_EITHER), |
| iio_get_time_ns()); |
| |
| /* clear the interrupt and push the event */ |
| i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT); |
| return IRQ_HANDLED; |
| } |
| |
| static int tsl2563_write_interrupt_config(struct iio_dev *indio_dev, |
| u64 event_code, |
| int state) |
| { |
| struct tsl2563_chip *chip = iio_priv(indio_dev); |
| int ret = 0; |
| |
| mutex_lock(&chip->lock); |
| if (state && !(chip->intr & 0x30)) { |
| chip->intr &= ~0x30; |
| chip->intr |= 0x10; |
| /* ensure the chip is actually on */ |
| cancel_delayed_work(&chip->poweroff_work); |
| if (!tsl2563_get_power(chip)) { |
| ret = tsl2563_set_power(chip, 1); |
| if (ret) |
| goto out; |
| ret = tsl2563_configure(chip); |
| if (ret) |
| goto out; |
| } |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_INT, |
| chip->intr); |
| chip->int_enabled = true; |
| } |
| |
| if (!state && (chip->intr & 0x30)) { |
| chip->intr |= ~0x30; |
| ret = i2c_smbus_write_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_INT, |
| chip->intr); |
| chip->int_enabled = false; |
| /* now the interrupt is not enabled, we can go to sleep */ |
| schedule_delayed_work(&chip->poweroff_work, 5 * HZ); |
| } |
| out: |
| mutex_unlock(&chip->lock); |
| |
| return ret; |
| } |
| |
| static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev, |
| u64 event_code) |
| { |
| struct tsl2563_chip *chip = iio_priv(indio_dev); |
| int ret; |
| |
| mutex_lock(&chip->lock); |
| ret = i2c_smbus_read_byte_data(chip->client, |
| TSL2563_CMD | TSL2563_REG_INT); |
| mutex_unlock(&chip->lock); |
| if (ret < 0) |
| goto error_ret; |
| ret = !!(ret & 0x30); |
| error_ret: |
| |
| return ret; |
| } |
| |
| /*--------------------------------------------------------------*/ |
| /* Probe, Attach, Remove */ |
| /*--------------------------------------------------------------*/ |
| static struct i2c_driver tsl2563_i2c_driver; |
| |
| static const struct iio_info tsl2563_info_no_irq = { |
| .driver_module = THIS_MODULE, |
| .read_raw = &tsl2563_read_raw, |
| .write_raw = &tsl2563_write_raw, |
| }; |
| |
| static const struct iio_info tsl2563_info = { |
| .driver_module = THIS_MODULE, |
| .read_raw = &tsl2563_read_raw, |
| .write_raw = &tsl2563_write_raw, |
| .read_event_value = &tsl2563_read_thresh, |
| .write_event_value = &tsl2563_write_thresh, |
| .read_event_config = &tsl2563_read_interrupt_config, |
| .write_event_config = &tsl2563_write_interrupt_config, |
| }; |
| |
| static int __devinit tsl2563_probe(struct i2c_client *client, |
| const struct i2c_device_id *device_id) |
| { |
| struct iio_dev *indio_dev; |
| struct tsl2563_chip *chip; |
| struct tsl2563_platform_data *pdata = client->dev.platform_data; |
| int err = 0; |
| u8 id = 0; |
| |
| indio_dev = iio_allocate_device(sizeof(*chip)); |
| if (!indio_dev) |
| return -ENOMEM; |
| |
| chip = iio_priv(indio_dev); |
| |
| i2c_set_clientdata(client, chip); |
| chip->client = client; |
| |
| err = tsl2563_detect(chip); |
| if (err) { |
| dev_err(&client->dev, "detect error %d\n", -err); |
| goto fail1; |
| } |
| |
| err = tsl2563_read_id(chip, &id); |
| if (err) { |
| dev_err(&client->dev, "read id error %d\n", -err); |
| goto fail1; |
| } |
| |
| mutex_init(&chip->lock); |
| |
| /* Default values used until userspace says otherwise */ |
| chip->low_thres = 0x0; |
| chip->high_thres = 0xffff; |
| chip->gainlevel = tsl2563_gainlevel_table; |
| chip->intr = TSL2563_INT_PERSIST(4); |
| chip->calib0 = calib_from_sysfs(CALIB_BASE_SYSFS); |
| chip->calib1 = calib_from_sysfs(CALIB_BASE_SYSFS); |
| |
| if (pdata) |
| chip->cover_comp_gain = pdata->cover_comp_gain; |
| else |
| chip->cover_comp_gain = 1; |
| |
| dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f); |
| indio_dev->name = client->name; |
| indio_dev->channels = tsl2563_channels; |
| indio_dev->num_channels = ARRAY_SIZE(tsl2563_channels); |
| indio_dev->dev.parent = &client->dev; |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| |
| if (client->irq) |
| indio_dev->info = &tsl2563_info; |
| else |
| indio_dev->info = &tsl2563_info_no_irq; |
| |
| if (client->irq) { |
| err = request_threaded_irq(client->irq, |
| NULL, |
| &tsl2563_event_handler, |
| IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
| "tsl2563_event", |
| indio_dev); |
| if (err) { |
| dev_err(&client->dev, "irq request error %d\n", -err); |
| goto fail1; |
| } |
| } |
| |
| err = tsl2563_configure(chip); |
| if (err) { |
| dev_err(&client->dev, "configure error %d\n", -err); |
| goto fail2; |
| } |
| |
| INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work); |
| |
| /* The interrupt cannot yet be enabled so this is fine without lock */ |
| schedule_delayed_work(&chip->poweroff_work, 5 * HZ); |
| |
| err = iio_device_register(indio_dev); |
| if (err) { |
| dev_err(&client->dev, "iio registration error %d\n", -err); |
| goto fail3; |
| } |
| |
| return 0; |
| |
| fail3: |
| cancel_delayed_work(&chip->poweroff_work); |
| flush_scheduled_work(); |
| fail2: |
| if (client->irq) |
| free_irq(client->irq, indio_dev); |
| fail1: |
| iio_free_device(indio_dev); |
| return err; |
| } |
| |
| static int tsl2563_remove(struct i2c_client *client) |
| { |
| struct tsl2563_chip *chip = i2c_get_clientdata(client); |
| struct iio_dev *indio_dev = iio_priv_to_dev(chip); |
| |
| iio_device_unregister(indio_dev); |
| if (!chip->int_enabled) |
| cancel_delayed_work(&chip->poweroff_work); |
| /* Ensure that interrupts are disabled - then flush any bottom halves */ |
| chip->intr |= ~0x30; |
| i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT, |
| chip->intr); |
| flush_scheduled_work(); |
| tsl2563_set_power(chip, 0); |
| if (client->irq) |
| free_irq(client->irq, indio_dev); |
| |
| iio_free_device(indio_dev); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int tsl2563_suspend(struct device *dev) |
| { |
| struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev)); |
| int ret; |
| |
| mutex_lock(&chip->lock); |
| |
| ret = tsl2563_set_power(chip, 0); |
| if (ret) |
| goto out; |
| |
| chip->suspended = true; |
| |
| out: |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static int tsl2563_resume(struct device *dev) |
| { |
| struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev)); |
| int ret; |
| |
| mutex_lock(&chip->lock); |
| |
| ret = tsl2563_set_power(chip, 1); |
| if (ret) |
| goto out; |
| |
| ret = tsl2563_configure(chip); |
| if (ret) |
| goto out; |
| |
| chip->suspended = false; |
| |
| out: |
| mutex_unlock(&chip->lock); |
| return ret; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(tsl2563_pm_ops, tsl2563_suspend, tsl2563_resume); |
| #define TSL2563_PM_OPS (&tsl2563_pm_ops) |
| #else |
| #define TSL2563_PM_OPS NULL |
| #endif |
| |
| static const struct i2c_device_id tsl2563_id[] = { |
| { "tsl2560", 0 }, |
| { "tsl2561", 1 }, |
| { "tsl2562", 2 }, |
| { "tsl2563", 3 }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, tsl2563_id); |
| |
| static struct i2c_driver tsl2563_i2c_driver = { |
| .driver = { |
| .name = "tsl2563", |
| .pm = TSL2563_PM_OPS, |
| }, |
| .probe = tsl2563_probe, |
| .remove = __devexit_p(tsl2563_remove), |
| .id_table = tsl2563_id, |
| }; |
| module_i2c_driver(tsl2563_i2c_driver); |
| |
| MODULE_AUTHOR("Nokia Corporation"); |
| MODULE_DESCRIPTION("tsl2563 light sensor driver"); |
| MODULE_LICENSE("GPL"); |