Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758947Ab2BJTVn (ORCPT ); Fri, 10 Feb 2012 14:21:43 -0500 Received: from 90-46-11-204.rar.beartech.net ([204.11.46.90]:65470 "EHLO exchsrvr.taosinc.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751753Ab2BJTVl (ORCPT ); Fri, 10 Feb 2012 14:21:41 -0500 X-Greylist: delayed 910 seconds by postgrey-1.27 at vger.kernel.org; Fri, 10 Feb 2012 14:21:41 EST x-mimeole: Produced By Microsoft Exchange V6.5 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: Evolution 2.32.2 Content-class: urn:content-classes:message Subject: [PATCH V1] TAOS tsl2x7x Date: Fri, 10 Feb 2012 13:06:52 -0600 Message-ID: <1328900812.15759.6.camel@jonz-ub2> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [PATCH V1] TAOS tsl2x7x Thread-Index: AczoJ8QsdKFp3RuBSt6W2cYvminUxw== From: "Jon Brenner" To: "Jonathan Cameron" Cc: , "linux-iio" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by nfs id q1AJLog4020164 Content-Length: 67662 Lines: 2325 TAOS device driver for tsl/tmd 2771 and 2772 device families (inc all variants). Signed-off-by: Jon Brenner --- .../iio/Documentation/sysfs-bus-iio-light-tsl2x7x | 71 + drivers/staging/iio/light/Kconfig | 11 + drivers/staging/iio/light/Makefile | 1 + drivers/staging/iio/light/tsl2x7x_core.c | 2053 ++++++++++++++++++++ drivers/staging/iio/light/tsl2x7x_core.h | 138 ++ 5 files changed, 2274 insertions(+), 0 deletions(-) diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2x7x b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2x7x new file mode 100644 index 0000000..f1bb5f5 --- /dev/null +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2x7x @@ -0,0 +1,71 @@ +What: /sys/bus/iio/devices/device[n]/lux_table +KernelVersion: 2.6.37 +Contact: linux-iio@vger.kernel.org +Description: + This property gets/sets the table of coefficients + used in calculating illuminance in lux. + +What: /sys/bus/iio/devices/device[n]/illuminance0_calibrate +KernelVersion: 2.6.37 +Contact: linux-iio@vger.kernel.org +Description: + This property causes an internal calibration of the als gain trim + value which is later used in calculating illuminance in lux. + +What: /sys/bus/iio/devices/device[n]/illuminance0_thresh_falling_value +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Low (falling) trigger point for the internal ALS comparison + function for interrupt generation. + +What: /sys/bus/iio/devices/device[n]/illuminance0_thresh_rising_value +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + high (rising) trigger point for the internal ALS comparison + function for interrupt generation. + +What: /sys/bus/iio/devices/device[n]/illuminance0_both_raw +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Simultainious ALS channel 1 and channel 2 data represented as + a 32 bit integer. + +What: /sys/bus/iio/devices/device[n]/proximity_calibrate +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Causes an recalculation and adjustment to the + proximity_thresh_rising_value. + +What: /sys/bus/iio/devices/device[n]/proximity_thresh_falling_value +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Low (falling) trigger point for the internal proximity comparison + function for interrupt generation. + +What: /sys/bus/iio/devices/device[n]/proximity_thresh_rising_value +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + high (rising) trigger point for the internal proximity comparison + function for interrupt generation. + +What: /sys/bus/iio/devices/device[n]/proximity_calibscale +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Hardware or software applied calibration scale factor assumed + to account for attenuation due to industrial design (glass + filters or aperture holes). + +What: /sys/bus/iio/devices/device[n]/proximity_raw +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + State of proximity detection based on the + proximity_thresh_rising_value. + diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig index e7e9159..29de333 100644 --- a/drivers/staging/iio/light/Kconfig +++ b/drivers/staging/iio/light/Kconfig @@ -31,4 +31,15 @@ config TSL2583 Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices. Access ALS data via iio, sysfs. + This driver can also be built as a module. If so, the module + will be called tsl2583. + +config TSL2x7x + tristate "TAOS TSL/TMD2x71 and TSL/TMD2x72 Family of light and proximity sensors" + depends on I2C + help + Support for: tsl2571, tsl2671, tmd2671, tsl2771, tmd2771, tsl2572, tsl2672, + tmd2672, tsl2772, tmd2772 devices. + Provides iio_events and direct access via sysfs. + endmenu diff --git a/drivers/staging/iio/light/Makefile b/drivers/staging/iio/light/Makefile index 3011fbf..ff12c4b 100644 --- a/drivers/staging/iio/light/Makefile +++ b/drivers/staging/iio/light/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o obj-$(CONFIG_TSL2583) += tsl2583.o +obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c new file mode 100644 index 0000000..671f476 --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.c @@ -0,0 +1,2053 @@ +/* + * Device driver for monitoring ambient light intensity in (lux) + * and proximity detection (prox) within the TAOS TSL2X7X family of devices. + * + * Copyright (c) 2012, TAOS Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include "tsl2x7x_core.h" +#include "../events.h" +#include "../buffer.h" +#include "../iio.h" +#include "../sysfs.h" + +/* Cal defs*/ +#define PROX_STAT_CAL 0 +#define PROX_STAT_SAMP 1 +#define MAX_SAMPLES_CAL 200 + +/* TSL2X7X Device ID */ +#define TRITON_ID 0x00 +#define SWORDFISH_ID 0x30 +#define HALIBUT_ID 0x20 + +/* Lux calculation constants */ +#define TSL2X7X_LUX_CALC_OVER_FLOW 65535 + +/* TAOS txx2x7x Device family members */ +enum { + tsl2571, + tsl2671, + tmd2671, + tsl2771, + tmd2771, + tsl2572, + tsl2672, + tmd2672, + tsl2772, + tmd2772 +}; + +enum { + TSL2X7X_CHIP_UNKNOWN = 0, + TSL2X7X_CHIP_WORKING = 1, + TSL2X7X_CHIP_SUSPENDED = 2 +}; + +/* Per-device data */ +struct tsl2x7x_als_info { + u16 als_ch0; + u16 als_ch1; + u16 lux; +}; + +/* proximity data */ +struct tsl2x7x_prox_info { + u16 prox_data; + int prox_event; +}; + +struct prox_stat { + u16 min; + u16 max; + u16 mean; + unsigned long stddev; +}; + +struct tsl2x7x_settings { + int als_time; + int als_gain; + int als_gain_trim; + int wait_time; + int prx_time; + int prox_gain; + int prox_config; + int als_cal_target; + u8 interrupts_en; + u8 als_persistence; + int als_thresh_low; + int als_thresh_high; + int prox_thres_low; + int prox_thres_high; + int prox_pulse_count; + int prox_max_samples_cal;/* for calibration mode*/ + +}; + +struct tsl2X7X_chip_info { + struct iio_chan_spec channel[0]; + const struct iio_info *info; +}; + +struct tsl2X7X_chip { + kernel_ulong_t id; + struct mutex prox_mutex; + struct mutex als_mutex; + struct i2c_client *client; + struct iio_dev *iio_dev; + struct tsl2x7x_prox_info prox_cur_info; + struct tsl2x7x_als_info als_cur_info; + struct tsl2x7x_settings tsl2x7x_settings; + struct tsl2X7X_platform_data *pdata; + int als_time_scale; + int als_saturation; + int tsl2x7x_chip_status; + u8 tsl2x7x_config[TSL2X7X_REG_MAX]; + bool init_done; + struct work_struct work_thresh; + s64 event_timestamp; + /* This structure is intentionally large to accommodate + * updates via sysfs. */ + /* Sized to 9 = max 8 segments + 1 termination segment */ + /* Assumption is one and only one type of glass used */ + struct tsl2x7x_lux tsl2x7x_device_lux[MAX_TABLE_SIZE]; +}; + +/* Different devices require different coefficents */ +static const struct tsl2x7x_lux tsl2x71_lux_table[] = { + { 14461, 611, 1211 }, + { 18540, 352, 623 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tmd2x71_lux_table[] = { + { 11635, 115, 256 }, + { 15536, 87, 179 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tsl2x72_lux_table[] = { + { 14013, 466, 917 }, + { 18222, 310, 552 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tmd2x72_lux_table[] = { + { 13218, 130, 262 }, + { 17592, 92, 169 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = { + [tsl2571] = tsl2x71_lux_table, + [tsl2671] = tsl2x71_lux_table, + [tmd2671] = tmd2x71_lux_table, + [tsl2771] = tsl2x71_lux_table, + [tmd2771] = tmd2x71_lux_table, + [tsl2572] = tsl2x72_lux_table, + [tsl2672] = tsl2x72_lux_table, + [tmd2672] = tmd2x72_lux_table, + [tsl2772] = tsl2x72_lux_table, + [tmd2772] = tmd2x72_lux_table, +}; + +struct als_gainadj { + s16 ch0; + s16 ch1; +}; + +/* Used to validate the ALS gain selection index */ +static const struct als_gainadj tsl2X7X_als_gainadj[] = { + { 1, 1 }, + { 8, 8 }, + { 16, 16 }, + { 120, 120 } +}; + + +/* Not using channels */ +static const struct iio_chan_spec tsl2X7X_channels[] = {}; + +/* + * Read a number of bytes starting at register (reg) location. + * Return 0, or i2c_smbus_write_byte ERROR code. + */ +static int +tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val, unsigned int len) +{ + int ret; + int i; + + for (i = 0; i < len; i++) { + /* select register to write */ + ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg)); + if (ret < 0) { + dev_err(&client->dev, "tsl2x7x_i2c_read failed to write" + " register %x\n", reg); + return ret; + } + /* read the data */ + *val = i2c_smbus_read_byte(client); + val++; + reg++; + } + return 0; +} + +/* + * Reads and calculates current lux value. + * The raw ch0 and ch1 values of the ambient light sensed in the last + * integration cycle are read from the device. + * Time scale factor array values are adjusted based on the integration time. + * The raw values are multiplied by a scale factor, and device gain is obtained + * using gain index. Limit checks are done next, then the ratio of a multiple + * of ch1 value, to the ch0 value, is calculated. The array tsl2x7x_device_lux[] + * declared above is then scanned to find the first ratio value that is just + * above the ratio we just calculated. The ch0 and ch1 multiplier constants in + * the array are then used along with the time scale factor array values, to + * calculate the lux. + */ +static int tsl2x7x_get_lux(struct iio_dev *indio_dev) +{ + u16 ch0, ch1; /* separated ch0/ch1 data from device */ + u32 lux; /* raw lux calculated from device data */ + u64 lux64; + u32 ratio; +#pragma pack(4) + u8 buf[4]; + struct tsl2x7x_lux *p; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int i, ret; + u32 ch0lux = 0; + u32 ch1lux = 0; + + if (mutex_trylock(&chip->als_mutex) == 0) { + dev_info(&chip->client->dev, "tsl2x7x_get_lux device is busy\n"); + return chip->als_cur_info.lux; /* busy, so return LAST VALUE */ + } + + if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) { + /* device is not enabled */ + dev_err(&chip->client->dev, "tsl2x7x_get_lux device is not enabled\n"); + ret = -EBUSY ; + goto out_unlock; + } + + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0], 1); + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_get_lux failed to read CMD_REG\n"); + goto out_unlock; + } + /* is data new & valid */ + if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) { + dev_err(&chip->client->dev, + "tsl2x7x_get_lux data not valid yet\n"); + ret = chip->als_cur_info.lux; /* return LAST VALUE */ + goto out_unlock; + } + + for (i = 0; i < 4; i++) { + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)), + &buf[i], 1); + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_get_lux failed to read" + " ret: %x\n", ret); + goto out_unlock; + } + } + + /* clear status, really interrupt status ( are off), + but we use the bit anyway */ + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | + TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_ALS_INT_CLR)); + + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_i2c_write_command failed in tsl2x7x_get_lux, err = %d\n", + ret); + goto out_unlock; /* have no data, so return failure */ + } + + /* extract ALS/lux data */ + ch0 = le16_to_cpup((const __le16 *)&buf[0]); + ch1 = le16_to_cpup((const __le16 *)&buf[2]); + + chip->als_cur_info.als_ch0 = ch0; + chip->als_cur_info.als_ch1 = ch1; + + if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) + goto return_max; + + if (ch0 == 0) { + /* have no data, so return LAST VALUE */ + ret = chip->als_cur_info.lux = 0; + goto out_unlock; + } + /* calculate ratio */ + ratio = (ch1 << 15) / ch0; + /* convert to unscaled lux using the pointer to the table */ + for (p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux; + p->ratio != 0 && p->ratio < ratio; p++) + ; + + if (p->ratio == 0) { + lux = 0; + } else { + ch0lux = ((ch0 * p->ch0) + + (tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch0 >> 1)) + / tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch0; + + ch1lux = ((ch1 * p->ch1) + + (tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch1 >> 1)) + / tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch1; + + lux = ch0lux - ch1lux; + } + + /* note: lux is 31 bit max at this point */ + if (ch1lux > ch0lux) { + dev_dbg(&chip->client->dev, "No Data - Return last value\n"); + ret = chip->als_cur_info.lux = 0; + goto out_unlock; + } + + /* adjust for active time scale */ + if (chip->als_time_scale == 0) + lux = 0; + else + lux = (lux + (chip->als_time_scale >> 1)) / + chip->als_time_scale; + + /* adjust for active gain scale + * The tsl2x7x_device_lux tables have a factor of 256 built-in. + * User-specified gain provides a multiplier. + * Apply user-specified gain before shifting right to retain precision. + * Use 64 bits to avoid overflow on multiplication. + * Then go back to 32 bits before division to avoid using div_u64(). + */ + lux64 = lux; + lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim; + lux64 >>= 8; + lux = lux64; + lux = (lux + 500) / 1000; + + if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) { /* check for overflow */ +return_max: + lux = TSL2X7X_LUX_CALC_OVER_FLOW; + } + + /* Update the structure with the latest VALID lux. */ + chip->als_cur_info.lux = lux; + ret = lux; + +out_unlock: + mutex_unlock(&chip->als_mutex); + return ret; + +} + +/* + * Proximity poll function - if valid data is available, read and form the ch0 + * and prox data values, check for limits on the ch0 value, and check the prox + * data against the current thresholds, to set the event status accordingly. + */ +static int tsl2x7x_prox_poll(struct iio_dev *indio_dev) +{ +#define CONSECUTIVE_RETRIES 50 + + int i; + int ret; + u8 status; + u8 chdata[2]; + int err_cnt; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (mutex_trylock(&chip->prox_mutex) == 0) { + dev_err(&chip->client->dev, "Can't get prox mutex\n"); + return -EBUSY; + } + + err_cnt = 0; + +try_again: + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status, 1); + if (ret < 0) { + dev_err(&chip->client->dev, + "Read regs failed in tsl2x7x_prox_poll() - A\n"); + mutex_unlock(&chip->prox_mutex); + return ret; + } + + /*Prox interrupt asserted*/ + if (((chip->tsl2x7x_settings.interrupts_en << 4) + & CNTL_PROX_INT_ENBL)) { + if (!(status & TSL2X7X_STA_ADC_VALID)) { + err_cnt++; + if (err_cnt > CONSECUTIVE_RETRIES) { + mutex_unlock(&chip->prox_mutex); + dev_err(&chip->client->dev, + "Consec. retries exceeded\n"); + return chip->prox_cur_info.prox_event; + } + goto try_again; + } + } + + for (i = 0; i < 2; i++) { + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | + (TSL2X7X_PRX_LO + i)), &chdata[i], 1); + if (ret < 0) { + dev_err(&chip->client->dev, + "Read regs failed in tsl2x7x_prox_poll() - B\n"); + mutex_unlock(&chip->prox_mutex); + return ret; + } + } + + chip->prox_cur_info.prox_data = (chdata[1]<<8)|chdata[0]; + + if (chip->prox_cur_info.prox_data >= + chip->tsl2x7x_settings.prox_thres_high) + chip->prox_cur_info.prox_event = 1; + else + chip->prox_cur_info.prox_event = 0; + + mutex_unlock(&chip->prox_mutex); + return chip->prox_cur_info.prox_event; +} + +/* + * Provides initial operational parameter defaults. + * These defaults may be changed through the device's sysfs files. + */ +static void tsl2x7x_defaults(struct tsl2X7X_chip *chip) +{ + /* Operational parameters */ + chip->tsl2x7x_settings.als_time = 200; + /* must be a multiple of 50mS */ + chip->tsl2x7x_settings.als_gain = 0; + /* this is actually an index into the gain table */ + chip->tsl2x7x_settings.prx_time = 0xfe; /*5.4 mS */ + /* 2.7ms prox integration time - decrease to increase time */ + /* decreases in 2.7 ms intervals */ + chip->tsl2x7x_settings.prox_gain = 1; + /* these are bits 3:2 of reg 0x0f: 0=x1,1=x2,2=x4,3=x8 */ + /* assume clear glass as default */ + chip->tsl2x7x_settings.wait_time = 245; + /* Time between PRX and ALS cycles -decrease to increase time */ + /* decreases in 2.7 ms intervals */ + chip->tsl2x7x_settings.prox_config = 0; + /* Prox configuration filters */ + chip->tsl2x7x_settings.als_gain_trim = 1000; + /* default gain trim to account for aperture effects */ + chip->tsl2x7x_settings.als_cal_target = 150; + /* Known external ALS reading used for calibration */ + chip->tsl2x7x_settings.als_thresh_low = 200; + /* CH0 'low' count to trigger interrupt */ + chip->tsl2x7x_settings.als_thresh_high = 256; + /* CH0 'high' count to trigger interrupt */ + chip->tsl2x7x_settings.als_persistence = 0xFF; + /* Number of 'out of limits' ADC readings PRX/ALS*/ + chip->tsl2x7x_settings.interrupts_en = 0x00; + /* Default interrupt(s) enabled. + * 0x00 = none, 0x10 = als, 0x20 = prx 0x30 = bth */ + chip->tsl2x7x_settings.prox_thres_low = 0; + chip->tsl2x7x_settings.prox_thres_high = 512; + /*default threshold (adjust either manually or with cal routine*/ + chip->tsl2x7x_settings.prox_max_samples_cal = 30; + chip->tsl2x7x_settings.prox_pulse_count = 8; + + /* Load up the lux table. Can be changed later via ABI */ + if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0) + memcpy(chip->tsl2x7x_device_lux, + chip->pdata->platform_lux_table, + sizeof(chip->pdata->platform_lux_table)); + else + memcpy(chip->tsl2x7x_device_lux, + (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id], + MAX_DEFAULT_TABLE_BYTES); + +} + +/* + * Obtain single reading and calculate the als_gain_trim + * (later used to derive actual lux). + * Return updated gain_trim value. + */ +static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + u8 reg_val; + int gain_trim_val; + int ret; + int lux_val; + + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_als_calibrate failed to write CNTRL register, ret=%d\n", + ret); + return ret; + } + + reg_val = i2c_smbus_read_byte(chip->client); + if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) + != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) { + dev_err(&chip->client->dev, + "tsl2x7x_als_calibrate failed: ADC not enabled\n"); + return -1; + } + + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_als_calibrate failed to write ctrl reg: ret=%d\n", + ret); + return ret; + } + reg_val = i2c_smbus_read_byte(chip->client); + + if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) { + dev_err(&chip->client->dev, + "tsl2x7x_als_calibrate failed: STATUS - ADC not valid.\n"); + return -ENODATA; + } + lux_val = tsl2x7x_get_lux(indio_dev); + if (lux_val < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_als_calibrate failed to get lux\n"); + return lux_val; + } + gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target) + * chip->tsl2x7x_settings.als_gain_trim) / lux_val); + + if ((gain_trim_val < 250) || (gain_trim_val > 4000)) + return -ERANGE; + + chip->tsl2x7x_settings.als_gain_trim = gain_trim_val; + + dev_info(&chip->client->dev, + "%s als_calibrate completed\n", chip->client->name); + + return (int) gain_trim_val; +} + +/* + * Turn the device on. + * Configuration must be set before calling this function. + */ +static int tsl2x7x_chip_on(struct iio_dev *indio_dev) +{ + int i; + int ret = 0; + u8 *dev_reg; + u8 utmp; + int als_count; + int als_time; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + u8 reg_val = 0; + + if (chip->pdata && chip->pdata->power_on) + chip->pdata->power_on(indio_dev); + + /* Non calculated parameters */ + chip->tsl2x7x_config[TSL2X7X_PRX_TIME] = + chip->tsl2x7x_settings.prx_time; + chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] = + chip->tsl2x7x_settings.wait_time; + chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] = + chip->tsl2x7x_settings.prox_config; + + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] = + (chip->tsl2x7x_settings.als_thresh_low) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] = + (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] = + (chip->tsl2x7x_settings.als_thresh_high) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] = + (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] = + chip->tsl2x7x_settings.als_persistence; + + chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] = + chip->tsl2x7x_settings.prox_pulse_count; + chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] = + chip->tsl2x7x_settings.prox_thres_low; + chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] = + chip->tsl2x7x_settings.prox_thres_high; + + /* and make sure we're not already on */ + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) { + /* if forcing a register update - turn off, then on */ + dev_info(&chip->client->dev, "device is already enabled\n"); + return -EINVAL; + } + + /* determine als integration regster */ + als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270; + if (als_count == 0) + als_count = 1; /* ensure at least one cycle */ + + /* convert back to time (encompasses overrides) */ + als_time = (als_count * 27 + 5) / 10; + chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count; + + /* Set the gain based on tsl2x7x_settings struct */ + chip->tsl2x7x_config[TSL2X7X_GAIN] = + (chip->tsl2x7x_settings.als_gain | (mA100 | DIODE1) + | ((chip->tsl2x7x_settings.prox_gain) << 2)); + + /* set chip struct re scaling and saturation */ + chip->als_saturation = als_count * 922; /* 90% of full scale */ + chip->als_time_scale = (als_time + 25) / 50; + + /* TSL2X7X Specific power-on / adc enable sequence + * Power on the device 1st. */ + utmp = TSL2X7X_CNTL_PWR_ON; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, "tsl2x7x_chip_on failed on CNTRL reg.\n"); + return -1; + } + + /* Use the following shadow copy for our delay before enabling ADC. + * Write all the registers. */ + for (i = 0, dev_reg = chip->tsl2x7x_config; i < TSL2X7X_REG_MAX; i++) { + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG + i, *dev_reg++); + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_chip_on failed on write to reg %d.\n", i); + return ret; + } + } + + udelay(3000); /* Power-on settling time */ + + /* NOW enable the ADC + * initialize the desired mode of operation */ + utmp = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL | CNTL_PROX_DET_ENBL; + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, "tsl2x7x_chip_on failed on 2nd CTRL reg.\n"); + return ret; + } + + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING; + + if (chip->tsl2x7x_settings.interrupts_en != 0) { + dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n"); + /* first time interrupt */ + chip->init_done = 0; + + + reg_val = TSL2X7X_CNTL_PWR_ON; + + if (chip->tsl2x7x_settings.interrupts_en == 0x10) + reg_val |= CNTL_ADC_ENBL; + + if (chip->tsl2x7x_settings.interrupts_en == 0x20) + reg_val |= CNTL_PROX_DET_ENBL; + + if (chip->tsl2x7x_settings.interrupts_en == 0x30) + reg_val |= (CNTL_ADC_ENBL | CNTL_PROX_DET_ENBL); + + reg_val |= chip->tsl2x7x_settings.interrupts_en; + + ret = i2c_smbus_write_byte_data(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val); + if (ret < 0) + dev_err(&chip->client->dev, + "tsl2x7x_i2c_write to device failed in tsl2x7x_IOCTL_INT_SET.\n"); + + /* Clear out any initial interrupts */ + ret = i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INTCLR); + if (ret < 0) { + dev_err(&chip->client->dev, + "tsl2x7x_i2c_write_command failed in tsl2x7x_chip_on\n"); + return ret; + } + } + return ret; + +} + +static int tsl2x7x_chip_off(struct iio_dev *indio_dev) +{ + int ret; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + /* turn device off */ + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED; + + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00); + + if (chip->pdata && chip->pdata->power_off) + chip->pdata->power_off(chip->client); + + return ret; +} + +/** + * Integer Square Root + * We need an integer version since 1st Floating point is not allowed + * in driver world, 2nd, cannot count on the devices having a FPU, and + * 3rd software FP emulation may be excessive. + */ +static unsigned long tsl2x7x_isqrt(unsigned long x) +{ + register unsigned long op, res, one; + op = x; + res = 0; + + one = 1 << 30; + while (one > op) + one >>= 2; + + while (one != 0) { + if (op >= res + one) { + op -= res + one; + res += one << 1; + } + res >>= 1; + one >>= 2; + } + return res; +} + +/* + * Proximity calibration helper function + * runs through a collection of data samples, + * sets the min, max, mean, and std dev. + */ +static +void tsl2x7x_prox_calculate(u16 *data, int length, struct prox_stat *statP) +{ + int i; + int min, max, sum, mean; + unsigned long stddev; + int tmp; + + if (length == 0) + length = 1; + + sum = 0; + min = 0xffff; + max = 0; + for (i = 0; i < length; i++) { + sum += data[i]; + if (data[i] < min) + min = data[i]; + if (data[i] > max) + max = data[i]; + } + mean = sum/length; + statP->min = min; + statP->max = max; + statP->mean = mean; + + sum = 0; + for (i = 0; i < length; i++) { + tmp = data[i]-mean; + sum += tmp * tmp; + } + stddev = tsl2x7x_isqrt((long)sum)/length; + statP->stddev = stddev; + +} + +/** + * Proximity calibration - collects a number of samples, + * calculates a standard deviation based on the samples, and + * sets the threshold accordingly. + */ +static void tsl2x7x_prox_cal(struct iio_dev *indio_dev) +{ + u16 prox_history[MAX_SAMPLES_CAL+1]; + int i; + struct prox_stat prox_stat_data[2]; + struct prox_stat *calP; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + u8 tmp_irq_settings; + u8 current_state = chip->tsl2x7x_chip_status; + + if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) { + dev_err(&chip->client->dev, + "max prox samples cal is too big: %d\n", + chip->tsl2x7x_settings.prox_max_samples_cal); + chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL; + } + + /* have to stop to change settings */ + tsl2x7x_chip_off(indio_dev); + + /* Enable proximity detection save just in case prox not wanted yet*/ + tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en; + chip->tsl2x7x_settings.interrupts_en |= CNTL_PROX_INT_ENBL; + + /*turn on device if not already on*/ + tsl2x7x_chip_on(indio_dev); + + /*gather the samples*/ + for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) { + mdelay(15); + tsl2x7x_prox_poll(indio_dev); + prox_history[i] = chip->prox_cur_info.prox_data; + dev_info(&chip->client->dev, "2 i=%d prox data= %d\n", + i, chip->prox_cur_info.prox_data); + + } + + tsl2x7x_chip_off(indio_dev); + + calP = &prox_stat_data[PROX_STAT_CAL]; + tsl2x7x_prox_calculate(prox_history, + chip->tsl2x7x_settings.prox_max_samples_cal, calP); + chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean; + + dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n", + calP->min, calP->mean, calP->max); + dev_info(&chip->client->dev, + "%s proximity threshold set to %d\n", + chip->client->name, chip->tsl2x7x_settings.prox_thres_high); + + /* back to the way they were */ + chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings; + if (current_state == TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_on(indio_dev); +} + +/* ---------- Sysfs Interface Functions ------------- */ + + +static ssize_t tsl2x7x_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status); +} + +static ssize_t tsl2x7x_power_state_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value == 0) + tsl2x7x_chip_off(dev_info); + else + tsl2x7x_chip_on(dev_info); + + return len; +} + +static ssize_t tsl2x7x_proximity_detect_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + tsl2x7x_prox_poll(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->prox_cur_info.prox_event); +} + +static ssize_t tsl2x7x_gain_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch0); +} + +static ssize_t tsl2x7x_gain_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + switch (value) { + case 1: + chip->tsl2x7x_settings.als_gain = 0; + break; + case 8: + chip->tsl2x7x_settings.als_gain = 1; + break; + case 16: + chip->tsl2x7x_settings.als_gain = 2; + break; + case 120: + chip->tsl2x7x_settings.als_gain = 3; + break; + case 128: + chip->tsl2x7x_settings.als_gain = 3; + break; + + default: + dev_err(dev, + "Invalid Gain Index\n"); + return -EINVAL; + } + + return len; +} + +static ssize_t tsl2x7x_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + if (strncmp(chip->client->name, "tsl2772", 7) == 0) + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128"); + else + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120"); +} + +static ssize_t tsl2x7x_prox_gain_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + (1 << chip->tsl2x7x_settings.prox_gain)); +} + +static ssize_t tsl2x7x_prox_gain_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + switch (value) { + case 1: + chip->tsl2x7x_settings.prox_gain = 0; + break; + case 2: + chip->tsl2x7x_settings.prox_gain = 1; + break; + case 4: + chip->tsl2x7x_settings.prox_gain = 2; + break; + case 8: + chip->tsl2x7x_settings.prox_gain = 3; + break; + default: + dev_err(dev, + "Invalid Prox Gain Index\n"); + return -EINVAL; + } + + return len; +} + +static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8"); +} + +static ssize_t tsl2x7x_als_time_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.als_time); +} + +static ssize_t tsl2x7x_als_time_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if ((value < 50) || (value > 650)) + return -EINVAL; + + if (value % 50) + return -EINVAL; + + chip->tsl2x7x_settings.als_time = value; + + return len; +} + +static ssize_t tsl2x7x_als_time_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", + "50 100 150 200 250 300 350 400 450 500 550 600 650"); +} + +static ssize_t tsl2x7x_als_trim_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.als_gain_trim); +} + +static ssize_t tsl2x7x_als_trim_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->tsl2x7x_settings.als_gain_trim = value; + + return len; +} + +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.als_cal_target); +} + +static ssize_t tsl2x7x_als_cal_target_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->tsl2x7x_settings.als_cal_target = value; + + return len; +} + +static ssize_t tsl2x7x_interrupts_en_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + if (chip->tsl2x7x_settings.interrupts_en & 0x10) + return snprintf(buf, PAGE_SIZE, "%d\n", 1); + else + return snprintf(buf, PAGE_SIZE, "%d\n", 0); +} + +static ssize_t tsl2x7x_interrupts_en_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value > 1) + return -EINVAL; + if (value) + chip->tsl2x7x_settings.interrupts_en |= 0x10; + else + chip->tsl2x7x_settings.interrupts_en &= 0x20; + + return len; +} + +static ssize_t tsl2x7x_prox_interrupt_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + if (chip->tsl2x7x_settings.interrupts_en & 0x20) + return snprintf(buf, PAGE_SIZE, "%d\n", 1); + else + return snprintf(buf, PAGE_SIZE, "%d\n", 0); +} + +static ssize_t tsl2x7x_prox_interrupt_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value > 1) + return -EINVAL; + if (value) + chip->tsl2x7x_settings.interrupts_en |= 0x20; + else + chip->tsl2x7x_settings.interrupts_en &= 0x10; + + return len; +} + +static ssize_t tsl2x7x_als_thresh_low_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.als_thresh_low); +} + +static ssize_t tsl2x7x_als_thresh_low_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.als_thresh_low = value; + + return len; +} + +static ssize_t tsl2x7x_als_thresh_high_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.als_thresh_high); +} + +static ssize_t tsl2x7x_als_thresh_high_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.als_thresh_high = value; + + return len; +} + +static ssize_t tsl2x7x_prox_thresh_low_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.prox_thres_low); +} + +static ssize_t tsl2x7x_prox_thresh_low_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.prox_thres_low = value; + + return len; +} + +static ssize_t tsl2x7x_prox_thresh_high_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->tsl2x7x_settings.prox_thres_high); +} + +static ssize_t tsl2x7x_prox_thresh_high_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.prox_thres_high = value; + + return len; +} + +static ssize_t tsl2x7x_prox_data_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + tsl2x7x_prox_poll(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", + chip->prox_cur_info.prox_data); +} + +/* sampling_frequency AKA persistence in data sheet */ +static ssize_t tsl2x7x_als_persistence_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + return snprintf(buf, PAGE_SIZE, "0x%02X\n", + chip->tsl2x7x_settings.als_persistence); +} + +static ssize_t tsl2x7x_als_persistence_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.als_persistence = value; + + return len; +} + +static +ssize_t tsl2x7x_als_persistence_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "0x00 - 0xFF (0 - 255)\n"); +} + +static +ssize_t tsl2x7x_lux_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + int lux; + + lux = tsl2x7x_get_lux(dev_info); + + return snprintf(buf, PAGE_SIZE, "%d\n", lux); +} + +static +ssize_t tsl2x7x_adc_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + tsl2x7x_get_lux(dev_info); + + return snprintf(buf, PAGE_SIZE, "0x%08x\n", + ((chip->als_cur_info.als_ch0 << 16) | + chip->als_cur_info.als_ch1)); +} + +static ssize_t tsl2x7x_do_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value == 1) + tsl2x7x_als_calibrate(dev_info); + + return len; +} + +static ssize_t tsl2x7x_luxtable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + int i; + int offset = 0; + + i = 0; + while (i < (MAX_TABLE_SIZE * 3)) { + offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,", + chip->tsl2x7x_device_lux[i].ratio, + chip->tsl2x7x_device_lux[i].ch0, + chip->tsl2x7x_device_lux[i].ch1); + if (chip->tsl2x7x_device_lux[i].ratio == 0) { + /* We just printed the first "0" entry. + * Now get rid of the extra "," and break. */ + offset--; + break; + } + i++; + } + + offset += snprintf(buf + offset, PAGE_SIZE, "\n"); + return offset; +} + +static ssize_t tsl2x7x_luxtable_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1]; + int n; + + get_options(buf, ARRAY_SIZE(value), value); + + /* We now have an array of ints starting at value[1], and + * enumerated by value[0]. + * We expect each group of three ints is one table entry, + * and the last table entry is all 0. + */ + n = value[0]; + if ((n % 3) || n < 6 || + n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) { + dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n); + return -EINVAL; + } + + if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) { + dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n); + return -EINVAL; + } + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_off(dev_info); + + /* Zero out the table */ + memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux)); + memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4)); + + return len; +} + +static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value == 1) + tsl2x7x_prox_cal(dev_info); + + return len; +} + +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, + tsl2x7x_power_state_show, tsl2x7x_power_state_store); + +static DEVICE_ATTR(proximity_raw, S_IRUGO, + tsl2x7x_proximity_detect_show, NULL); + +static DEVICE_ATTR(intensity_infrared_raw, S_IRUGO, + tsl2x7x_prox_data_show, NULL); + + +static DEVICE_ATTR(proximity_calibscale, S_IRUGO | S_IWUSR, + tsl2x7x_prox_gain_show, tsl2x7x_prox_gain_store); +static DEVICE_ATTR(proximity_calibscale_available, S_IRUGO, + tsl2x7x_prox_gain_available_show, NULL); + +static DEVICE_ATTR(illuminance0_calibscale, S_IRUGO | S_IWUSR, + tsl2x7x_gain_show, tsl2x7x_gain_store); +static DEVICE_ATTR(illuminance0_calibscale_available, S_IRUGO, + tsl2x7x_gain_available_show, NULL); + +static DEVICE_ATTR(illuminance0_integration_time, S_IRUGO | S_IWUSR, + tsl2x7x_als_time_show, tsl2x7x_als_time_store); +static DEVICE_ATTR(illuminance0_integration_time_available, S_IRUGO, + tsl2x7x_als_time_available_show, NULL); + +static DEVICE_ATTR(illuminance0_calibbias, S_IRUGO | S_IWUSR, + tsl2x7x_als_trim_show, tsl2x7x_als_trim_store); + +static DEVICE_ATTR(illuminance0_input_target, S_IRUGO | S_IWUSR, + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store); + +static DEVICE_ATTR(illuminance0_both_raw, S_IRUGO, tsl2x7x_adc_show, + NULL); + +static DEVICE_ATTR(illuminance0_input, S_IRUGO, tsl2x7x_lux_show, + NULL); +static DEVICE_ATTR(illuminance0_calibrate, S_IWUSR, NULL, + tsl2x7x_do_calibrate); +static DEVICE_ATTR(proximity_calibrate, S_IWUSR, NULL, + tsl2x7x_do_prox_calibrate); + +static DEVICE_ATTR(illuminance0_lux_table, S_IRUGO | S_IWUSR, + tsl2x7x_luxtable_show, tsl2x7x_luxtable_store); + +static DEVICE_ATTR(illuminance0_thresh_falling_value, S_IRUGO | S_IWUSR, + tsl2x7x_als_thresh_low_show, tsl2x7x_als_thresh_low_store); + +static DEVICE_ATTR(illuminance0_thresh_rising_value, S_IRUGO | S_IWUSR, + tsl2x7x_als_thresh_high_show, tsl2x7x_als_thresh_high_store); + +static DEVICE_ATTR(sampling_frequency, S_IRUGO | S_IWUSR, + tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store); + +static DEVICE_ATTR(sampling_frequency_available, S_IRUGO, + tsl2x7x_als_persistence_available_show, NULL); + +static DEVICE_ATTR(proximity_thresh_rising_value, S_IRUGO | S_IWUSR, + tsl2x7x_prox_thresh_high_show, tsl2x7x_prox_thresh_high_store); + +static DEVICE_ATTR(proximity_thresh_falling_value, S_IRUGO | S_IWUSR, + tsl2x7x_prox_thresh_low_show, tsl2x7x_prox_thresh_low_store); + +static struct attribute *tsl2571_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &dev_attr_illuminance0_integration_time_available.attr, + &dev_attr_illuminance0_calibbias.attr, + &dev_attr_illuminance0_input_target.attr, + &dev_attr_illuminance0_both_raw.attr, + &dev_attr_illuminance0_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_illuminance0_thresh_falling_value.attr, + &dev_attr_illuminance0_thresh_rising_value.attr, + &dev_attr_sampling_frequency.attr, + &dev_attr_sampling_frequency_available.attr, + NULL +}; + +static struct attribute *tsl2671_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_proximity_raw.attr, + &dev_attr_intensity_infrared_raw.attr, + &dev_attr_sampling_frequency.attr, + &dev_attr_sampling_frequency_available.attr, + &dev_attr_proximity_thresh_rising_value.attr, + &dev_attr_proximity_thresh_falling_value.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2771_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_proximity_raw.attr, + &dev_attr_intensity_infrared_raw.attr, + &dev_attr_illuminance0_calibscale.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &dev_attr_illuminance0_integration_time_available.attr, + &dev_attr_illuminance0_calibbias.attr, + &dev_attr_illuminance0_input_target.attr, + &dev_attr_illuminance0_both_raw.attr, + &dev_attr_illuminance0_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_illuminance0_thresh_falling_value.attr, + &dev_attr_illuminance0_thresh_rising_value.attr, + &dev_attr_sampling_frequency.attr, + &dev_attr_sampling_frequency_available.attr, + &dev_attr_proximity_thresh_rising_value.attr, + &dev_attr_proximity_thresh_falling_value.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2572_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &dev_attr_illuminance0_integration_time_available.attr, + &dev_attr_illuminance0_calibbias.attr, + &dev_attr_illuminance0_input_target.attr, + &dev_attr_illuminance0_both_raw.attr, + &dev_attr_illuminance0_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_illuminance0_thresh_falling_value.attr, + &dev_attr_illuminance0_thresh_rising_value.attr, + &dev_attr_sampling_frequency.attr, + &dev_attr_sampling_frequency_available.attr, + NULL +}; + +static struct attribute *tsl2672_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_proximity_raw.attr, + &dev_attr_intensity_infrared_raw.attr, + &dev_attr_proximity_calibscale.attr, + &dev_attr_sampling_frequency.attr, + &dev_attr_sampling_frequency_available.attr, + &dev_attr_proximity_thresh_rising_value.attr, + &dev_attr_proximity_thresh_falling_value.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2772_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_proximity_raw.attr, + &dev_attr_proximity_calibscale.attr, + &dev_attr_intensity_infrared_raw.attr, + &dev_attr_illuminance0_calibscale.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &dev_attr_illuminance0_integration_time_available.attr, + &dev_attr_illuminance0_calibbias.attr, + &dev_attr_illuminance0_input_target.attr, + &dev_attr_illuminance0_both_raw.attr, + &dev_attr_illuminance0_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_illuminance0_thresh_falling_value.attr, + &dev_attr_illuminance0_thresh_rising_value.attr, + &dev_attr_sampling_frequency.attr, + &dev_attr_sampling_frequency_available.attr, + &dev_attr_proximity_thresh_rising_value.attr, + &dev_attr_proximity_thresh_falling_value.attr, + &dev_attr_proximity_calibrate.attr, + &dev_attr_proximity_calibscale_available.attr, + NULL +}; + +static struct attribute_group tsl2X7X_dev_attr_group_tbl[] = { + [tsl2571] = { + .attrs = tsl2571_device_attrs, + }, + [tsl2671] = { + .attrs = tsl2671_device_attrs, + }, + [tmd2671] = { + .attrs = tsl2671_device_attrs, + }, + [tsl2771] = { + .attrs = tsl2771_device_attrs, + }, + [tmd2771] = { + .attrs = tsl2771_device_attrs, + }, + [tsl2572] = { + .attrs = tsl2572_device_attrs, + }, + [tsl2672] = { + .attrs = tsl2672_device_attrs, + }, + [tmd2672] = { + .attrs = tsl2672_device_attrs, + }, + [tsl2772] = { + .attrs = tsl2772_device_attrs, + }, + [tmd2772] = { + .attrs = tsl2772_device_attrs, + }, + +}; + +static IIO_DEVICE_ATTR(illuminance_thresh_both_en, + S_IRUGO | S_IWUSR, + tsl2x7x_interrupts_en_show, tsl2x7x_interrupts_en_store, 0); + +static IIO_DEVICE_ATTR(proximity_thresh_both_en, + S_IRUGO | S_IWUSR, + tsl2x7x_prox_interrupt_show, tsl2x7x_prox_interrupt_store, 0); + +static struct attribute *tsl2X7X_prox_event_attributes[] = { + &iio_dev_attr_proximity_thresh_both_en.dev_attr.attr, + NULL, +}; + +static struct attribute *tsl2X7X_als_event_attributes[] = { + &iio_dev_attr_illuminance_thresh_both_en.dev_attr.attr, + NULL, +}; + +static struct attribute *tsl2X7X_proxals_event_attributes[] = { + &iio_dev_attr_illuminance_thresh_both_en.dev_attr.attr, + &iio_dev_attr_proximity_thresh_both_en.dev_attr.attr, + NULL, +}; + +static struct attribute_group tsl2X7X_event_attr_group_tbl[] = { + [tsl2571] = { + .attrs = tsl2X7X_als_event_attributes, + .name = "events", + }, + [tsl2671] = { + .attrs = tsl2X7X_prox_event_attributes, + .name = "events", + }, + [tmd2671] = { + .attrs = tsl2X7X_prox_event_attributes, + .name = "events", + }, + [tsl2771] = { + .attrs = tsl2X7X_proxals_event_attributes, + .name = "events", + }, + [tmd2771] = { + .attrs = tsl2X7X_proxals_event_attributes, + .name = "events", + }, + + [tsl2572] = { + .attrs = tsl2X7X_als_event_attributes, + .name = "events", + }, + [tsl2672] = { + .attrs = tsl2X7X_prox_event_attributes, + .name = "events", + }, + [tmd2672] = { + .attrs = tsl2X7X_prox_event_attributes, + .name = "events", + }, + [tsl2772] = { + .attrs = tsl2X7X_proxals_event_attributes, + .name = "events", + }, + [tmd2772] = { + .attrs = tsl2X7X_proxals_event_attributes, + .name = "events", + } +}; + + +/* Use the default register values to identify the Taos device */ +static int tsl2x7x_device_id(unsigned char *bufp, int target) +{ + switch (target) { + case tsl2571: + case tsl2671: + case tsl2771: + return ((bufp[TSL2X7X_CHIPID] & 0xf0) == TRITON_ID); + break; + case tmd2671: + case tmd2771: + return ((bufp[TSL2X7X_CHIPID] & 0xf0) == HALIBUT_ID); + break; + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + return ((bufp[TSL2X7X_CHIPID] & 0xf0) == SWORDFISH_ID); + break; + } + + return -EINVAL; +} + +static const struct iio_info tsl2X7X_info[] = { + [tsl2571] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2571], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2571], + .driver_module = THIS_MODULE, + }, + [tsl2671] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2671], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2671], + .driver_module = THIS_MODULE, + }, + [tmd2671] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2671], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2671], + .driver_module = THIS_MODULE, + }, + [tsl2771] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2771], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2771], + .driver_module = THIS_MODULE, + }, + [tmd2771] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2771], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2771], + .driver_module = THIS_MODULE, + }, + [tsl2572] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2572], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2572], + .driver_module = THIS_MODULE, + }, + [tsl2672] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2672], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2672], + .driver_module = THIS_MODULE, + }, + [tmd2672] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2672], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2672], + .driver_module = THIS_MODULE, + }, + [tsl2772] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2772], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2772], + .driver_module = THIS_MODULE, + }, + [tmd2772] = { + .attrs = &tsl2X7X_dev_attr_group_tbl[tsl2772], + .event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2772], + .driver_module = THIS_MODULE, + }, + +}; + +/* + * Run-time interrupt handler - depending on whether the device is in ambient + * light sensing interrupt mode, this handler can queue up + * a thread, to handle valid interrupts. + */ +static irqreturn_t tsl2x7x_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + s64 timestamp = iio_get_time_ns(); + int ret; + int value; + + value = i2c_smbus_read_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_STATUS); + + /* What type of interrupt do we need to process */ + if (value & TSL2X7X_STA_PRX_INTR) { + tsl2x7x_prox_poll(indio_dev); + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); + } + + if (value & TSL2X7X_STA_ALS_INTR) { + tsl2x7x_get_lux(indio_dev); + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_LIGHT, + 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER), + timestamp); + } + /* Clear interrupt now that we have the status */ + ret = i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INTCLR); + if (ret < 0) + dev_err(&chip->client->dev, + "Failed to clear irq from event handler. err = %d\n", ret); + + return IRQ_HANDLED; +} + +/* + * Client probe function. + */ +static int __devinit tsl2x7x_probe(struct i2c_client *clientp, + const struct i2c_device_id *id) +{ + int i, ret; + unsigned char buf[TSL2X7X_MAX_DEVICE_REGS]; + struct iio_dev *indio_dev = + iio_allocate_device(sizeof(struct tsl2X7X_chip)); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (indio_dev == NULL) { + ret = -ENOMEM; + dev_err(&clientp->dev, "iio allocation failed\n"); + goto fail1; + } + + chip = iio_priv(indio_dev); + chip->client = clientp; + i2c_set_clientdata(clientp, indio_dev); + + mutex_init(&chip->als_mutex); + mutex_init(&chip->prox_mutex); + + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN; + + chip->pdata = clientp->dev.platform_data; + if (chip->pdata && chip->pdata->init) + chip->pdata->init(clientp); + + for (i = 0; i < TSL2X7X_MAX_DEVICE_REGS; i++) { + ret = i2c_smbus_write_byte(clientp, + (TSL2X7X_CMD_REG | (TSL2X7X_CNTRL + i))); + if (ret < 0) { + dev_err(&clientp->dev, "i2c_smbus_write_bytes() to cmd " + "reg failed in tsl2x7x_probe(), err = %d\n", ret); + goto fail1; + } + ret = i2c_smbus_read_byte(clientp); + if (ret < 0) { + dev_err(&clientp->dev, "i2c_smbus_read_byte from " + "reg failed in tsl2x7x_probe(), err = %d\n", ret); + + goto fail1; + } + buf[i] = ret; + } + + if ((!tsl2x7x_device_id(buf, id->driver_data)) || + (tsl2x7x_device_id(buf, id->driver_data) == -EINVAL)) { + dev_info(&chip->client->dev, "i2c device found but does not match " + "expected id in tsl2x7x_probe()\n"); + goto fail1; + } + + chip->id = id->driver_data; + + ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&clientp->dev, "i2c_smbus_write_byte() to cmd reg " + "failed in tsl2x7x_probe(), err = %d\n", ret); + goto fail1; + } + + indio_dev->info = &tsl2X7X_info[id->driver_data]; + indio_dev->dev.parent = &clientp->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->name = chip->client->name; + indio_dev->channels = tsl2X7X_channels; + indio_dev->num_channels = ARRAY_SIZE(tsl2X7X_channels); + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&clientp->dev, "iio registration failed\n"); + goto fail2; + } + + if (clientp->irq) { + ret = request_threaded_irq(clientp->irq, + NULL, + &tsl2x7x_event_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "TSL2X7X_event", + indio_dev); + if (ret) + dev_err(&clientp->dev, "irq request failed"); + } + + /* Load up the defaults */ + tsl2x7x_defaults(chip); + + /* Make sure the chip is on */ + tsl2x7x_chip_on(indio_dev); + + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name); + + return 0; + +fail1: + if (chip->pdata && chip->pdata->teardown) + chip->pdata->teardown(clientp); + iio_free_device(indio_dev); + +fail2: + return ret; + +} + + +static int tsl2x7x_suspend(struct device *dev) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + + int ret = 0; + + /* Blocks if work is active */ + cancel_work_sync(&chip->work_thresh); + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) { + ret = tsl2x7x_chip_off(dev_info); + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED; + } + + if (chip->pdata && chip->pdata->platform_power) { + pm_message_t pmm = {PM_EVENT_SUSPEND}; + chip->pdata->platform_power(dev, pmm); + } + + return ret; +} + +static int tsl2x7x_resume(struct device *dev) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(dev_info); + int ret = 0; + + if (chip->pdata && chip->pdata->platform_power) { + pm_message_t pmm = {PM_EVENT_RESUME}; + chip->pdata->platform_power(dev, pmm); + } + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED) + ret = tsl2x7x_chip_on(dev_info); + + return ret; +} + +static int __devexit tsl2x7x_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct tsl2X7X_chip *chip = i2c_get_clientdata(client); + + tsl2x7x_chip_off(indio_dev); + + if (client->irq) + free_irq(client->irq, chip->client->name); + + flush_scheduled_work(); + + iio_device_unregister(chip->iio_dev); + kfree(chip); + + if (chip->pdata && chip->pdata->teardown) + chip->pdata->teardown(client); + + return 0; +} + +static struct i2c_device_id tsl2x7x_idtable[] = { + { "tsl2571", tsl2571 }, + { "tsl2671", tsl2671 }, + { "tmd2671", tmd2671 }, + { "tsl2771", tsl2771 }, + { "tmd2771", tmd2771 }, + { "tsl2572", tsl2572 }, + { "tsl2672", tsl2672 }, + { "tmd2672", tmd2672 }, + { "tsl2772", tsl2772 }, + { "tmd2772", tmd2772 }, + {} +}; + +MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable); + +static const struct dev_pm_ops tsl2x7x_pm_ops = { + .suspend = tsl2x7x_suspend, + .resume = tsl2x7x_resume, +}; + +/* Driver definition */ +static struct i2c_driver tsl2x7x_driver = { + .driver = { + .name = "tsl2X7X", + .pm = &tsl2x7x_pm_ops, + + }, + .id_table = tsl2x7x_idtable, + .probe = tsl2x7x_probe, + .remove = __devexit_p(tsl2x7x_remove), +}; + +static int __init tsl2x7x_init(void) +{ + return i2c_add_driver(&tsl2x7x_driver); +} + +static void __exit tsl2x7x_exit(void) +{ + i2c_del_driver(&tsl2x7x_driver); +} + +module_init(tsl2x7x_init); +module_exit(tsl2x7x_exit); + +MODULE_AUTHOR("J. August Brenner"); +MODULE_DESCRIPTION("TAOS tsl2X7X ambient light sensor driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/iio/light/tsl2x7x_core.h b/drivers/staging/iio/light/tsl2x7x_core.h new file mode 100644 index 0000000..9a64412 --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.h @@ -0,0 +1,138 @@ +/* + * Device driver for monitoring ambient light intensity (lux) + * and proximity (prox) within the TAOS TSL2X7X family of devices. + * + * Copyright (c) 2012, TAOS Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef __TSL2X7X_H +#define __TSL2X7X_H +#include + +#include "../iio.h" + +/* TAOS Register definitions - note: + * depending on device, some of these register are not used and the + * register address is benign. + */ +/* 2X7X register offsets */ +#define TSL2X7X_MAX_DEVICE_REGS 32 +#define TSL2X7X_REG_MAX 16 + +/* Device Registers and Masks */ +#define TSL2X7X_CNTRL 0x00 +#define TSL2X7X_ALS_TIME 0X01 +#define TSL2X7X_PRX_TIME 0x02 +#define TSL2X7X_WAIT_TIME 0x03 +#define TSL2X7X_ALS_MINTHRESHLO 0X04 +#define TSL2X7X_ALS_MINTHRESHHI 0X05 +#define TSL2X7X_ALS_MAXTHRESHLO 0X06 +#define TSL2X7X_ALS_MAXTHRESHHI 0X07 +#define TSL2X7X_PRX_MINTHRESHLO 0X08 +#define TSL2X7X_PRX_MINTHRESHHI 0X09 +#define TSL2X7X_PRX_MAXTHRESHLO 0X0A +#define TSL2X7X_PRX_MAXTHRESHHI 0X0B +#define TSL2X7X_PERSISTENCE 0x0C +#define TSL2X7X_PRX_CONFIG 0x0D +#define TSL2X7X_PRX_COUNT 0x0E +#define TSL2X7X_GAIN 0x0F +#define TSL2X7X_NOTUSED 0x10 +#define TSL2X7X_REVID 0x11 +#define TSL2X7X_CHIPID 0x12 +#define TSL2X7X_STATUS 0x13 +#define TSL2X7X_ALS_CHAN0LO 0x14 +#define TSL2X7X_ALS_CHAN0HI 0x15 +#define TSL2X7X_ALS_CHAN1LO 0x16 +#define TSL2X7X_ALS_CHAN1HI 0x17 +#define TSL2X7X_PRX_LO 0x18 +#define TSL2X7X_PRX_HI 0x19 + +/* tsl2X7X cmd reg masks */ +#define TSL2X7X_CMD_REG 0x80 +#define TSL2X7X_CMD_SPL_FN 0x60 + +#define TSL2X7X_CMD_PROX_INT_CLR 0X05 +#define TSL2X7X_CMD_ALS_INT_CLR 0x06 +#define CMD_PROXALS_INT_CLR 0X07 + +/* tsl2X7X cntrl reg masks */ +#define TSL2X7X_CNTL_ADC_ENBL 0x02 +#define TSL2X7X_CNTL_PWR_ON 0x01 + +/* tsl2X7X status reg masks */ +#define TSL2X7X_STA_ADC_VALID 0x01 +#define TSL2X7X_STA_PRX_VALID 0x02 +#define TSL2X7X_STA_ADC_PRX_VALID 0x03 +#define TSL2X7X_STA_ALS_INTR 0x10 +#define TSL2X7X_STA_ADC_INTR 0x10 +#define TSL2X7X_STA_PRX_INTR 0x20 + +#define TSL2X7X_STA_ADC_INTR 0x10 + +/* tsl2X7X cntrl reg masks */ +#define CNTL_REG_CLEAR 0x00 +#define CNTL_PROX_INT_ENBL 0X20 +#define CNTL_ALS_INT_ENBL 0X10 +#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08 +#define CNTL_PROX_DET_ENBL 0X04 +#define CNTL_ADC_ENBL 0x02 +#define TSL2X7X_CNTL_PWRON 0x01 +#define CNTL_ALSPON_ENBL 0x03 +#define CNTL_INTALSPON_ENBL 0x13 +#define CNTL_PROXPON_ENBL 0x0F +#define CNTL_INTPROXPON_ENBL 0x2F +#define TSL2X7X_CMD_PROXALS_INTCLR 0X07 + +/*Prox diode to use */ +#define DIODE0 0x10 +#define DIODE1 0x20 +#define DIODE_BOTH 0x30 + +/* LED Power */ +#define mA100 0x00 +#define mA50 0x40 +#define mA25 0x80 +#define mA13 0xD0 + +/* Max number of segments allowable in LUX table */ +#define MAX_TABLE_SIZE 9 +#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * MAX_TABLE_SIZE) + +struct tsl2x7x_lux { + unsigned int ratio; + unsigned int ch0; + unsigned int ch1; +}; + + +/* struct tsl2x7x_platform_data - Assume all varients will have this */ +struct tsl2X7X_platform_data { + int (*platform_power)(struct device *dev, pm_message_t); + /* The following callback gets called when the TSL2772 is powered on */ + int (*power_on) (struct iio_dev *indio_dev); + /* The following callback gets called when the TSL2772 is powered off */ + int (*power_off) (struct i2c_client *dev); + /* The following callback gets called when the driver is added */ + int (*init) (struct i2c_client *dev); + /* The following callback gets called when the driver is removed */ + int (*teardown) (struct i2c_client *dev); + /* These are the device specific glass coefficents used to + * calculate Lux */ + struct tsl2x7x_lux platform_lux_table[MAX_TABLE_SIZE]; +}; + +#endif /* __TSL2X7X_H */ -- 1.7.4.1 ????{.n?+???????+%?????ݶ??w??{.n?+????{??G?????{ay?ʇڙ?,j??f???h?????????z_??(?階?ݢj"???m??????G????????????&???~???iO???z??v?^?m???? ????????I?