From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759472Ab2CUQQi (ORCPT ); Wed, 21 Mar 2012 12:16:38 -0400 Received: from 90-46-11-204.rar.beartech.net ([204.11.46.90]:2658 "EHLO exchsrvr.taosinc.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757063Ab2CUQQR convert rfc822-to-8bit (ORCPT ); Wed, 21 Mar 2012 12:16:17 -0400 Subject: [PATCH V4] TAOS tsl2x7x From: Jon Brenner To: Jonathan Cameron Cc: linux-iio , Linux Kernel Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Wed, 21 Mar 2012 11:16:24 -0500 Message-ID: <1332346584.15943.2.camel@jonz-ub2> Mime-Version: 1.0 X-Mailer: Evolution 2.32.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org TAOS device driver (version 4) for the tsl/tmd 2771 and 2772 device families (inc. all variants). Signed-off-by: Jon Brenner --- .../light/sysfs-bus-iio-light-tsl2583 | 6 + .../light/sysfs-bus-iio-light-tsl2x7x | 20 + drivers/staging/iio/Documentation/sysfs-bus-iio | 7 + .../staging/iio/Documentation/sysfs-bus-iio-light | 8 +- .../iio/Documentation/sysfs-bus-iio-light-tsl2583 | 20 - drivers/staging/iio/light/Kconfig | 8 + drivers/staging/iio/light/Makefile | 1 + drivers/staging/iio/light/tsl2x7x_core.c | 1911 ++++++++++++++++++++ drivers/staging/iio/light/tsl2x7x_core.h | 75 + 9 files changed, 2032 insertions(+), 24 deletions(-) diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 new file mode 100644 index 0000000..8f2a038 --- /dev/null +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 @@ -0,0 +1,6 @@ +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. diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x new file mode 100644 index 0000000..cceadae --- /dev/null +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x @@ -0,0 +1,20 @@ +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_both_raw +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Simultainious ALS channel data. + +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. + diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio index 46a995d..5b2b5d3 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio @@ -258,6 +258,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale +what /sys/bus/iio/devices/iio:deviceX/illuminance0_calibscale +what /sys/bus/iio/devices/iio:deviceX/proximity_calibscale KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -457,6 +459,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_falling_value What: /sys/.../events/in_voltageY_raw_thresh_falling_value What: /sys/.../events/in_tempY_raw_thresh_falling_value What: /sys/.../events/in_tempY_raw_thresh_falling_value +What: /sys/.../events/illuminance0_thresh_falling_value +what: /sys/.../events/illuminance0_thresh_rising_value +what: /sys/.../events/proximity_thresh_falling_value +what: /sys/.../events/proximity_thresh_rising_value KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: @@ -739,3 +745,4 @@ Description: system. To minimize the current consumption of the system, the bridge can be disconnected (when it is not being used using the bridge_switch_en attribute. + diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light index edbf470..4385c70 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light @@ -76,10 +76,10 @@ Contact: linux-iio@vger.kernel.org Description: This property gets/sets the sensors ADC analog integration time. -What: /sys/bus/iio/devices/device[n]/illuminance0_calibscale +What: /sys/bus/iio/devices/device[n]/lux_table KernelVersion: 2.6.37 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). + This property gets/sets the table of coefficients + used in calculating illuminance in lux. + diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583 deleted file mode 100644 index 660781d..0000000 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583 +++ /dev/null @@ -1,20 +0,0 @@ -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_input_target -KernelVersion: 2.6.37 -Contact: linux-iio@vger.kernel.org -Description: - This property is the known externally illuminance (in lux). - It is used in the process of calibrating the device accuracy. diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig index e7e9159..976f790 100644 --- a/drivers/staging/iio/light/Kconfig +++ b/drivers/staging/iio/light/Kconfig @@ -31,4 +31,12 @@ config TSL2583 Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices. Access ALS data via iio, sysfs. +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..c0d9d6e --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.c @@ -0,0 +1,1911 @@ +/* + * 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 "tsl2x7x_core.h" +#include "../events.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 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_CONFIG_REG 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 TSL2X7X_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 TSL2X7X_CNTL_REG_CLEAR 0x00 +#define TSL2X7X_CNTL_PROX_INT_ENBL 0X20 +#define TSL2X7X_CNTL_ALS_INT_ENBL 0X10 +#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08 +#define TSL2X7X_CNTL_PROX_DET_ENBL 0X04 +#define TSL2X7X_CNTL_PWRON 0x01 +#define TSL2X7X_CNTL_ALSPON_ENBL 0x03 +#define TSL2X7X_CNTL_INTALSPON_ENBL 0x13 +#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F +#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F + +/*Prox diode to use */ +#define TSL2X7X_DIODE0 0x10 +#define TSL2X7X_DIODE1 0x20 +#define TSL2X7X_DIODE_BOTH 0x30 + +/* LED Power */ +#define TSL2X7X_mA100 0x00 +#define TSL2X7X_mA50 0x40 +#define TSL2X7X_mA25 0x80 +#define TSL2X7X_mA13 0xD0 + +/*Common device IIO EventMask */ +#define TSL2X7X_EVENT_MASK \ + (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \ + IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)), + +/* 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_chip_info { + int num_channels; + struct iio_chan_spec channel[9]; + 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 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_MAX_CONFIG_REG]; + const struct tsl2x7x_chip_info *chip_info; + const struct iio_info *info; + s64 event_timestamp; + /* This structure is intentionally large to accommodate + * updates via sysfs. */ + /* Sized to 9 = max 8 segments + 1 termination segment */ + struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_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, +}; + +static const struct tsl2x7x_settings tsl2x7x_default_settings = { + .als_time = 200, + /* must be a multiple of 50mS */ + .als_gain = 0, + /* this is actually an index into the gain table */ + .prx_time = 0xfe, /*5.4 mS */ + /* 2.7ms prox integration time - decrease to increase time */ + /* decreases in 2.7 ms intervals */ + .prox_gain = 1, + /* these are bits 3:2 of reg 0x0f: 0=x1,1=x2,2=x4,3=x8 */ + /* assume clear glass as default */ + .wait_time = 245, + /* Time between PRX and ALS cycles -decrease to increase time */ + /* decreases in 2.7 ms intervals */ + .prox_config = 0, + /* Prox configuration filters */ + .als_gain_trim = 1000, + /* default gain trim to account for aperture effects */ + .als_cal_target = 150, + /* Known external ALS reading used for calibration */ + .als_thresh_low = 200, + /* CH0 'low' count to trigger interrupt */ + .als_thresh_high = 256, + /* CH0 'high' count to trigger interrupt */ + .als_persistence = 0xFF, + /* Number of 'out of limits' ADC readings PRX/ALS*/ + .interrupts_en = 0x00, + /* Default interrupt(s) enabled. + * 0x00 = none, 0x10 = als, 0x20 = prx 0x30 = bth */ + .prox_thres_low = 0, + .prox_thres_high = 512, + /*default threshold adjust either manually or with cal routine*/ + .prox_max_samples_cal = 30, + .prox_pulse_count = 8 +}; + +static const s16 tsl2X7X_als_gainadj[] = { + 1, + 8, + 16, + 120 +}; + +static const s16 tsl2X7X_prx_gainadj[] = { + 1, + 2, + 4, + 8 +}; + +/* Channel variations */ +enum { + ALS, + PRX, + ALSPRX, + PRX2, + ALSPRX2, +}; + +const u8 device_channel_config[] = { + ALS, + PRX, + PRX, + ALSPRX, + ALSPRX, + ALS, + PRX2, + PRX2, + ALSPRX2, + ALSPRX2 +}; + +/* + * 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) +{ + int ret; + + /* select register to write */ + ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg)); + if (ret < 0) { + dev_err(&client->dev, "%s: failed to write register %x\n" + , __func__, reg); + return ret; + } + /* read the data */ + *val = i2c_smbus_read_byte(client); + + 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; + 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, "%s: device is not enabled\n", + __func__); + ret = -EBUSY ; + goto out_unlock; + } + + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to read CMD_REG\n", __func__); + goto out_unlock; + } + /* is data new & valid */ + if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) { + dev_err(&chip->client->dev, + "%s: data not valid yet\n", __func__); + 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]); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to read. err=%x\n", __func__, 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, + "i2c_write_command failed in %s, err = %d\n", + __func__, 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)) { + lux = TSL2X7X_LUX_CALC_OVER_FLOW; + 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 */ + p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux; + while (p->ratio != 0 && p->ratio < ratio) + p++; + + if (p->ratio == 0) { + lux = 0; + } else { + ch0lux = DIV_ROUND_UP((ch0 * p->ch0), + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]); + ch1lux = DIV_ROUND_UP((ch1 * p->ch1), + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]); + lux = ch0lux - ch1lux; + } + + /* note: lux is 31 bit max at this point */ + if (ch1lux > ch0lux) { + dev_dbg(&chip->client->dev, "Returning last value\n"); + ret = chip->als_cur_info.lux; + 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 */ + lux = TSL2X7X_LUX_CALC_OVER_FLOW; + + /* Update the structure with the latest lux. */ +return_max: + 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, + "%s: Can't get prox mutex\n", __func__); + return -EBUSY; + } + + err_cnt = 0; + +try_again: + + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: i2c err=%d\n", __func__, ret); + goto prox_poll_err; + } + + if (chip->id < tsl2572) { + if (!(status & TSL2X7X_STA_ADC_VALID)) { + err_cnt++; + if (err_cnt > CONSECUTIVE_RETRIES) { + dev_err(&chip->client->dev, + "%s: Consec. retries exceeded\n", __func__); + goto prox_poll_err; + } + goto try_again; + } + } else { + if (!(status & TSL2X7X_STA_PRX_VALID)) { + err_cnt++; + if (err_cnt > CONSECUTIVE_RETRIES) { + dev_err(&chip->client->dev, + "%s: Consec. retries exceeded\n", __func__); + goto prox_poll_err; + } + goto try_again; + } + } + + for (i = 0; i < 2; i++) { + ret = tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | + (TSL2X7X_PRX_LO + i)), &chdata[i]); + if (ret < 0) + goto prox_poll_err; + } + + chip->prox_cur_info.prox_data = (chdata[1]<<8)|chdata[0]; + if (chip->prox_cur_info.prox_data == 0) + goto try_again; + + 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; + +prox_poll_err: + mutex_unlock(&chip->prox_mutex); + + return ret; +} + +/* + * Provides initial operational parameter defaults. + * These defaults may be changed through the device's sysfs files. + */ +static void tsl2x7x_defaults(struct tsl2X7X_chip *chip) +{ + /* If Operational settings defined elsewhere.. */ + if (chip->pdata && chip->pdata->platform_default_settings != 0) + memcpy(&(chip->tsl2x7x_settings), + chip->pdata->platform_default_settings, + sizeof(tsl2x7x_default_settings)); + else + memcpy(&(chip->tsl2x7x_settings), + &tsl2x7x_default_settings, + sizeof(tsl2x7x_default_settings)); + + /* Load up the proper lux table. */ + 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, + "%s: failed to write CNTRL register, ret=%d\n", + __func__, 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, + "%s: failed: ADC not enabled\n", __func__); + return -1; + } + + ret = i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to write ctrl reg: ret=%d\n", + __func__, 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, + "%s: failed: STATUS - ADC not valid.\n", __func__); + return -ENODATA; + } + + lux_val = tsl2x7x_get_lux(indio_dev); + if (lux_val < 0) { + dev_err(&chip->client->dev, + "%s: failed to get lux\n", __func__); + 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 | + (TSL2X7X_mA100 | TSL2X7X_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, + "%s: failed on CNTRL reg.\n", __func__); + 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_MAX_CONFIG_REG; i++) { + ret = i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG + i, *dev_reg++); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on write to reg %d.\n", __func__, 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 | + TSL2X7X_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, + "%s: failed on 2nd CTRL reg.\n", __func__); + 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"); + + reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL; + if ((chip->tsl2x7x_settings.interrupts_en == 0x20) || + (chip->tsl2x7x_settings.interrupts_en == 0x30)) + reg_val |= TSL2X7X_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, + "%s: failed in tsl2x7x_IOCTL_INT_SET.\n", + __func__); + + /* Clear out any initial interrupts */ + ret = i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INT_CLR); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed in tsl2x7x_chip_on\n", + __func__); + 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; +} + +/* + * 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 = INT_MAX; + max = INT_MIN; + 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 = int_sqrt((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, + "%s: max prox samples cal is too big: %d\n", + __func__, 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 |= TSL2X7X_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); +} + +static ssize_t tsl2x7x_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + 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 *indio_dev = dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (!value) + tsl2x7x_chip_off(indio_dev); + else + tsl2x7x_chip_on(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (chip->id > tsl2771) + 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_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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + 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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + 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 IIO_CONST_ATTR(illuminance0_integration_time_available, + "50 100 150 200 250 300 350 400 450 500 550 600 650"); + +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + 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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->tsl2x7x_settings.als_cal_target = value; + + return len; +} + +/* 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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + return snprintf(buf, PAGE_SIZE, "%d\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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.als_persistence = value; + + return len; +} + +static IIO_CONST_ATTR(sampling_frequency_available, + "0x00 - 0xFF (0 - 255)"); + +static ssize_t tsl2x7x_do_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_als_calibrate(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_luxtable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int i; + int offset = 0; + + i = 0; + while (i < (TSL2X7X_MAX_LUX_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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + 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(indio_dev); + + /* 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 *indio_dev = dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_prox_cal(indio_dev); + + return len; +} + +static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int ret; + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) + ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10); + else + ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20); + + return ret; +} + +static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) { + if (val) + chip->tsl2x7x_settings.interrupts_en |= 0x10; + else + chip->tsl2x7x_settings.interrupts_en &= 0x20; + } else { + if (val) + chip->tsl2x7x_settings.interrupts_en |= 0x20; + else + chip->tsl2x7x_settings.interrupts_en &= 0x10; + } + + return 0; +} + +static int tsl2x7x_write_thresh(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + chip->tsl2x7x_settings.als_thresh_high = val; + break; + case IIO_EV_DIR_FALLING: + chip->tsl2x7x_settings.als_thresh_low = val; + break; + default: + return -EINVAL; + } + } else { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + chip->tsl2x7x_settings.prox_thres_high = val; + break; + case IIO_EV_DIR_FALLING: + chip->tsl2x7x_settings.prox_thres_low = val; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int tsl2x7x_read_thresh(struct iio_dev *indio_dev, + u64 event_code, + int *val) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val = chip->tsl2x7x_settings.als_thresh_high; + break; + case IIO_EV_DIR_FALLING: + *val = chip->tsl2x7x_settings.als_thresh_low; + break; + default: + return -EINVAL; + } + } else { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val = chip->tsl2x7x_settings.prox_thres_high; + break; + case IIO_EV_DIR_FALLING: + *val = chip->tsl2x7x_settings.prox_thres_low; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int tsl2x7x_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + int ret = -EINVAL; + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + switch (mask) { + case 0: + switch (chan->type) { + case IIO_LIGHT: + tsl2x7x_get_lux(indio_dev); + if (chan->processed_val) + *val = chip->als_cur_info.lux; + else + *val = (((chip->als_cur_info.als_ch0 << 16) | + chip->als_cur_info.als_ch1)); + ret = IIO_VAL_INT; + break; + case IIO_PROXIMITY: + tsl2x7x_prox_poll(indio_dev); + if (chan->processed_val) + *val = chip->prox_cur_info.prox_event; + else + *val = chip->prox_cur_info.prox_data; + ret = IIO_VAL_INT; + break; + default: + return -EINVAL; + break; + } + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type == IIO_LIGHT) + *val = + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]; + else + *val = + tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain]; + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_CALIBBIAS: + *val = chip->tsl2x7x_settings.als_gain_trim; + ret = IIO_VAL_INT; + break; + + default: + ret = -EINVAL; + } + + return ret; +} + +static int tsl2x7x_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type == IIO_LIGHT) { + switch (val) { + 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: + if (chip->id > tsl2771) + return -EINVAL; + chip->tsl2x7x_settings.als_gain = 3; + break; + case 128: + if (chip->id < tsl2572) + return -EINVAL; + chip->tsl2x7x_settings.als_gain = 3; + break; + default: + return -EINVAL; + } + } else { + switch (val) { + 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: + return -EINVAL; + } + } + break; + case IIO_CHAN_INFO_CALIBBIAS: + chip->tsl2x7x_settings.als_gain_trim = val; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, + tsl2x7x_power_state_show, tsl2x7x_power_state_store); + +static DEVICE_ATTR(proximity_calibscale_available, S_IRUGO, + tsl2x7x_prox_gain_available_show, NULL); + +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_target_input, S_IRUGO | S_IWUSR, + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store); + +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(sampling_frequency, S_IRUGO | S_IWUSR, + tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store); + +/* Use the default register values to identify the Taos device */ +static int tsl2x7x_device_id(unsigned char *id, int target) +{ + switch (target) { + case tsl2571: + case tsl2671: + case tsl2771: + return ((*id & 0xf0) == TRITON_ID); + break; + case tmd2671: + case tmd2771: + return ((*id & 0xf0) == HALIBUT_ID); + break; + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + return ((*id & 0xf0) == SWORDFISH_ID); + break; + } + + return -EINVAL; +} + +/* + * Interrupt Event Handler */ +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_INT_CLR); + if (ret < 0) + dev_err(&chip->client->dev, + "%s: Failed to clear irq from event handler. err = %d\n", + __func__, ret); + + return IRQ_HANDLED; +} + +static struct attribute *tsl2x7x_ALS_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr, + &dev_attr_illuminance0_target_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL +}; + +static struct attribute *tsl2x7x_PRX_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr, + &dev_attr_illuminance0_target_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2x7x_PRX2_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + &dev_attr_proximity_calibscale_available.attr, + NULL +}; + +static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr, + &dev_attr_illuminance0_target_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + &dev_attr_proximity_calibscale_available.attr, + NULL +}; + +static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = { + [ALS] = { + .attrs = tsl2x7x_ALS_device_attrs, + }, + [PRX] = { + .attrs = tsl2x7x_PRX_device_attrs, + }, + [ALSPRX] = { + .attrs = tsl2x7x_ALSPRX_device_attrs, + }, + [PRX2] = { + .attrs = tsl2x7x_PRX2_device_attrs, + }, + [ALSPRX2] = { + .attrs = tsl2x7x_ALSPRX2_device_attrs, + }, +}; + +static const struct iio_info tsl2X7X_device_info[] = { + [ALS] = { + .attrs = &tsl2X7X_device_attr_group_tbl[ALS], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [PRX] = { + .attrs = &tsl2X7X_device_attr_group_tbl[PRX], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [ALSPRX] = { + .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [PRX2] = { + .attrs = &tsl2X7X_device_attr_group_tbl[PRX2], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, + [ALSPRX2] = { + .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2], + .driver_module = THIS_MODULE, + .read_raw = &tsl2x7x_read_raw, + .write_raw = &tsl2x7x_write_raw, + .read_event_value = &tsl2x7x_read_thresh, + .write_event_value = &tsl2x7x_write_thresh, + .read_event_config = &tsl2x7x_read_interrupt_config, + .write_event_config = &tsl2x7x_write_interrupt_config, + }, +}; + +static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = { + [ALS] = { + .channel = { + [0] = { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [1] = { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask = + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .num_channels = 2, + .info = &tsl2X7X_device_info[ALS], + }, + [PRX] = { + .channel = { + [0] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [1] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .num_channels = 2, + .info = &tsl2X7X_device_info[PRX], + }, + [ALSPRX] = { + .channel = { + [0] = { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [1] = { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask = + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + [2] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [3] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .processed_val = 0, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .num_channels = 4, + .info = &tsl2X7X_device_info[ALSPRX], + }, + [PRX2] = { + .channel = { + [0] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [1] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask = + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .num_channels = 2, + .info = &tsl2X7X_device_info[PRX2], + }, + [ALSPRX2] = { + .channel = { + [0] = { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [1] = { + .type = IIO_LIGHT, + .indexed = 1, + .channel = 0, + .info_mask = + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + [2] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .processed_val = 1, + }, + [3] = { + .type = IIO_PROXIMITY, + .indexed = 1, + .channel = 0, + .info_mask = + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask = TSL2X7X_EVENT_MASK + }, + }, + .num_channels = 4, + .info = &tsl2X7X_device_info[ALSPRX2], + }, +}; + +/* + * Client probe function. + */ +static int __devinit tsl2x7x_probe(struct i2c_client *clientp, + const struct i2c_device_id *id) +{ + int ret; + unsigned char device_id; + struct iio_dev *indio_dev; + struct tsl2X7X_chip *chip; + + indio_dev = iio_allocate_device(sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + chip = iio_priv(indio_dev); + chip->client = clientp; + i2c_set_clientdata(clientp, indio_dev); + + ret = tsl2x7x_i2c_read(chip->client, + TSL2X7X_CHIPID, &device_id); + if (ret < 0) + goto fail1; + + if ((!tsl2x7x_device_id(&device_id, id->driver_data)) || + (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) { + dev_info(&chip->client->dev, + "i2c device found does not match expected id in %s\n", + __func__); + goto fail1; + } + + ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n", + __func__, ret); + goto fail1; + } + + /* ALS and PROX functions can be invoked via user space poll + * or H/W interrupt. If busy return last sample. */ + mutex_init(&chip->als_mutex); + mutex_init(&chip->prox_mutex); + + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN; + chip->pdata = clientp->dev.platform_data; + chip->id = id->driver_data; + chip->chip_info = + &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]]; + + indio_dev->info = chip->chip_info->info; + indio_dev->dev.parent = &clientp->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->name = chip->client->name; + indio_dev->channels = chip->chip_info->channel; + indio_dev->num_channels = chip->chip_info->num_channels; + + 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, + "%s: irq request failed", __func__); + goto fail2; + } + } + + /* Load up the defaults */ + tsl2x7x_defaults(chip); + /* Make sure the chip is on */ + tsl2x7x_chip_on(indio_dev); + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&clientp->dev, + "%s: iio registration failed\n", __func__); + goto fail3; + } + + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name); + + return 0; + +fail3: + if (clientp->irq) + free_irq(clientp->irq, indio_dev); +fail2: + iio_free_device(indio_dev); +fail1: + kfree(chip); + return ret; +} + +static int tsl2x7x_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + int ret = 0; + + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) { + ret = tsl2x7x_chip_off(indio_dev); + 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 *indio_dev = dev_get_drvdata(dev); + struct tsl2X7X_chip *chip = iio_priv(indio_dev); + 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(indio_dev); + + 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); + + iio_free_device(indio_dev); + + 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), +}; + +module_i2c_driver(tsl2x7x_driver); + +MODULE_AUTHOR("J. August Brenner"); +MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity 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..663e846 --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.h @@ -0,0 +1,75 @@ +/* + * 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 + +/* Max number of segments allowable in LUX table */ +#define TSL2X7X_MAX_LUX_TABLE_SIZE 9 +#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * TSL2X7X_MAX_LUX_TABLE_SIZE) + +struct iio_dev; +struct iio_chan_spec; + +struct tsl2x7x_lux { + unsigned int ratio; + unsigned int ch0; + unsigned int ch1; +}; + +/* Refer to tsl2x7x_default_settings for member desc. */ +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; +}; + +/* struct tsl2x7x_platform_data - + * Platform unique glass and defaults + * Platform PM functions. */ +struct tsl2X7X_platform_data { + /* Suspend/resume platform cb */ + int (*platform_power)(struct device *dev, pm_message_t); + /* The following callback gets called when the device is powered on */ + int (*power_on) (struct iio_dev *indio_dev); + /* The following callback gets called when the device is powered off */ + int (*power_off) (struct i2c_client *dev); + /* These are the device specific glass coefficents used to + * calculate Lux */ + struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE]; + struct tsl2x7x_settings *platform_default_settings; +}; + +#endif /* __TSL2X7X_H */ -- 1.7.4.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: [PATCH V4] TAOS tsl2x7x From: Jon Brenner To: Jonathan Cameron Cc: linux-iio , Linux Kernel Content-Type: text/plain; charset="UTF-8" Date: Wed, 21 Mar 2012 11:16:24 -0500 Message-ID: <1332346584.15943.2.camel@jonz-ub2> Mime-Version: 1.0 List-ID: TAOS device driver (version 4) for the tsl/tmd 2771 and 2772 device familie= s (inc. all variants). Signed-off-by: Jon Brenner --- .../light/sysfs-bus-iio-light-tsl2583 | 6 + .../light/sysfs-bus-iio-light-tsl2x7x | 20 + drivers/staging/iio/Documentation/sysfs-bus-iio | 7 + .../staging/iio/Documentation/sysfs-bus-iio-light | 8 +- .../iio/Documentation/sysfs-bus-iio-light-tsl2583 | 20 - drivers/staging/iio/light/Kconfig | 8 + drivers/staging/iio/light/Makefile | 1 + drivers/staging/iio/light/tsl2x7x_core.c | 1911 ++++++++++++++++= ++++ drivers/staging/iio/light/tsl2x7x_core.h | 75 + 9 files changed, 2032 insertions(+), 24 deletions(-) diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-ts= l2583 b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 new file mode 100644 index 0000000..8f2a038 --- /dev/null +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 @@ -0,0 +1,6 @@ +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. diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-ts= l2x7x b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x new file mode 100644 index 0000000..cceadae --- /dev/null +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x @@ -0,0 +1,20 @@ +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_both_raw +KernelVersion: 3.3-rc1 +Contact: linux-iio@vger.kernel.org +Description: + Simultainious ALS channel data. + +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. + diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/stag= ing/iio/Documentation/sysfs-bus-iio index 46a995d..5b2b5d3 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio @@ -258,6 +258,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calib= scale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale +what /sys/bus/iio/devices/iio:deviceX/illuminance0_calibscale +what /sys/bus/iio/devices/iio:deviceX/proximity_calibscale KernelVersion: 2.6.35 Contact: linux-iio@vger.kernel.org Description: @@ -457,6 +459,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_falling_= value What: /sys/.../events/in_voltageY_raw_thresh_falling_value What: /sys/.../events/in_tempY_raw_thresh_falling_value What: /sys/.../events/in_tempY_raw_thresh_falling_value +What: /sys/.../events/illuminance0_thresh_falling_value +what: /sys/.../events/illuminance0_thresh_rising_value +what: /sys/.../events/proximity_thresh_falling_value +what: /sys/.../events/proximity_thresh_rising_value KernelVersion: 2.6.37 Contact: linux-iio@vger.kernel.org Description: @@ -739,3 +745,4 @@ Description: system. To minimize the current consumption of the system, the bridge can be disconnected (when it is not being used using the bridge_switch_en attribute. + diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/driver= s/staging/iio/Documentation/sysfs-bus-iio-light index edbf470..4385c70 100644 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light @@ -76,10 +76,10 @@ Contact: linux-iio@vger.kernel.org Description: This property gets/sets the sensors ADC analog integration time. -What: /sys/bus/iio/devices/device[n]/illuminance0_calibscale +What: /sys/bus/iio/devices/device[n]/lux_table KernelVersion: 2.6.37 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). + This property gets/sets the table of coefficients + used in calculating illuminance in lux. + diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583 = b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583 deleted file mode 100644 index 660781d..0000000 --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583 +++ /dev/null @@ -1,20 +0,0 @@ -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_input_target -KernelVersion: 2.6.37 -Contact: linux-iio@vger.kernel.org -Description: - This property is the known externally illuminance (in lux). - It is used in the process of calibrating the device accuracy. diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/= Kconfig index e7e9159..976f790 100644 --- a/drivers/staging/iio/light/Kconfig +++ b/drivers/staging/iio/light/Kconfig @@ -31,4 +31,12 @@ config TSL2583 Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices. Access ALS data via iio, sysfs. +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, tsl26= 72, + 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-$(CONFIG_SENSORS_TSL2563) +=3D tsl2563.o obj-$(CONFIG_SENSORS_ISL29018) +=3D isl29018.o obj-$(CONFIG_TSL2583) +=3D tsl2583.o +obj-$(CONFIG_TSL2x7x) +=3D 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..c0d9d6e --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.c @@ -0,0 +1,1911 @@ +/* + * Device driver for monitoring ambient light intensity in (lux) + * and proximity detection (prox) within the TAOS TSL2X7X family of device= s. + * + * 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 WIT= HOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License f= or + * 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 "tsl2x7x_core.h" +#include "../events.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 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_CONFIG_REG 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 TSL2X7X_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 TSL2X7X_CNTL_REG_CLEAR 0x00 +#define TSL2X7X_CNTL_PROX_INT_ENBL 0X20 +#define TSL2X7X_CNTL_ALS_INT_ENBL 0X10 +#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08 +#define TSL2X7X_CNTL_PROX_DET_ENBL 0X04 +#define TSL2X7X_CNTL_PWRON 0x01 +#define TSL2X7X_CNTL_ALSPON_ENBL 0x03 +#define TSL2X7X_CNTL_INTALSPON_ENBL 0x13 +#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F +#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F + +/*Prox diode to use */ +#define TSL2X7X_DIODE0 0x10 +#define TSL2X7X_DIODE1 0x20 +#define TSL2X7X_DIODE_BOTH 0x30 + +/* LED Power */ +#define TSL2X7X_mA100 0x00 +#define TSL2X7X_mA50 0x40 +#define TSL2X7X_mA25 0x80 +#define TSL2X7X_mA13 0xD0 + +/*Common device IIO EventMask */ +#define TSL2X7X_EVENT_MASK \ + (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \ + IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)), + +/* TAOS txx2x7x Device family members */ +enum { + tsl2571, + tsl2671, + tmd2671, + tsl2771, + tmd2771, + tsl2572, + tsl2672, + tmd2672, + tsl2772, + tmd2772 +}; + +enum { + TSL2X7X_CHIP_UNKNOWN =3D 0, + TSL2X7X_CHIP_WORKING =3D 1, + TSL2X7X_CHIP_SUSPENDED =3D 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_chip_info { + int num_channels; + struct iio_chan_spec channel[9]; + 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 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_MAX_CONFIG_REG]; + const struct tsl2x7x_chip_info *chip_info; + const struct iio_info *info; + s64 event_timestamp; + /* This structure is intentionally large to accommodate + * updates via sysfs. */ + /* Sized to 9 =3D max 8 segments + 1 termination segment */ + struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE]; +}; + +/* Different devices require different coefficents */ +static const struct tsl2x7x_lux tsl2x71_lux_table[] =3D { + { 14461, 611, 1211 }, + { 18540, 352, 623 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tmd2x71_lux_table[] =3D { + { 11635, 115, 256 }, + { 15536, 87, 179 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tsl2x72_lux_table[] =3D { + { 14013, 466, 917 }, + { 18222, 310, 552 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux tmd2x72_lux_table[] =3D { + { 13218, 130, 262 }, + { 17592, 92, 169 }, + { 0, 0, 0 }, +}; + +static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] =3D { + [tsl2571] =3D tsl2x71_lux_table, + [tsl2671] =3D tsl2x71_lux_table, + [tmd2671] =3D tmd2x71_lux_table, + [tsl2771] =3D tsl2x71_lux_table, + [tmd2771] =3D tmd2x71_lux_table, + [tsl2572] =3D tsl2x72_lux_table, + [tsl2672] =3D tsl2x72_lux_table, + [tmd2672] =3D tmd2x72_lux_table, + [tsl2772] =3D tsl2x72_lux_table, + [tmd2772] =3D tmd2x72_lux_table, +}; + +static const struct tsl2x7x_settings tsl2x7x_default_settings =3D { + .als_time =3D 200, + /* must be a multiple of 50mS */ + .als_gain =3D 0, + /* this is actually an index into the gain table */ + .prx_time =3D 0xfe, /*5.4 mS */ + /* 2.7ms prox integration time - decrease to increase time */ + /* decreases in 2.7 ms intervals */ + .prox_gain =3D 1, + /* these are bits 3:2 of reg 0x0f: 0=3Dx1,1=3Dx2,2=3Dx4,3=3Dx8 */ + /* assume clear glass as default */ + .wait_time =3D 245, + /* Time between PRX and ALS cycles -decrease to increase time */ + /* decreases in 2.7 ms intervals */ + .prox_config =3D 0, + /* Prox configuration filters */ + .als_gain_trim =3D 1000, + /* default gain trim to account for aperture effects */ + .als_cal_target =3D 150, + /* Known external ALS reading used for calibration */ + .als_thresh_low =3D 200, + /* CH0 'low' count to trigger interrupt */ + .als_thresh_high =3D 256, + /* CH0 'high' count to trigger interrupt */ + .als_persistence =3D 0xFF, + /* Number of 'out of limits' ADC readings PRX/ALS*/ + .interrupts_en =3D 0x00, + /* Default interrupt(s) enabled. + * 0x00 =3D none, 0x10 =3D als, 0x20 =3D prx 0x30 =3D bth */ + .prox_thres_low =3D 0, + .prox_thres_high =3D 512, + /*default threshold adjust either manually or with cal routine*/ + .prox_max_samples_cal =3D 30, + .prox_pulse_count =3D 8 +}; + +static const s16 tsl2X7X_als_gainadj[] =3D { + 1, + 8, + 16, + 120 +}; + +static const s16 tsl2X7X_prx_gainadj[] =3D { + 1, + 2, + 4, + 8 +}; + +/* Channel variations */ +enum { + ALS, + PRX, + ALSPRX, + PRX2, + ALSPRX2, +}; + +const u8 device_channel_config[] =3D { + ALS, + PRX, + PRX, + ALSPRX, + ALSPRX, + ALS, + PRX2, + PRX2, + ALSPRX2, + ALSPRX2 +}; + +/* + * 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) +{ + int ret; + + /* select register to write */ + ret =3D i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg)); + if (ret < 0) { + dev_err(&client->dev, "%s: failed to write register %x\n" + , __func__, reg); + return ret; + } + /* read the data */ + *val =3D i2c_smbus_read_byte(client); + + 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 ti= me. + * The raw values are multiplied by a scale factor, and device gain is obt= ained + * using gain index. Limit checks are done next, then the ratio of a multi= ple + * 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 ju= st + * above the ratio we just calculated. The ch0 and ch1 multiplier constant= s 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; + u8 buf[4]; + struct tsl2x7x_lux *p; + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + int i, ret; + u32 ch0lux =3D 0; + u32 ch1lux =3D 0; + + if (mutex_trylock(&chip->als_mutex) =3D=3D 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 !=3D TSL2X7X_CHIP_WORKING) { + /* device is not enabled */ + dev_err(&chip->client->dev, "%s: device is not enabled\n", + __func__); + ret =3D -EBUSY ; + goto out_unlock; + } + + ret =3D tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to read CMD_REG\n", __func__); + goto out_unlock; + } + /* is data new & valid */ + if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) { + dev_err(&chip->client->dev, + "%s: data not valid yet\n", __func__); + ret =3D chip->als_cur_info.lux; /* return LAST VALUE */ + goto out_unlock; + } + + for (i =3D 0; i < 4; i++) { + ret =3D tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)), + &buf[i]); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to read. err=3D%x\n", __func__, ret); + goto out_unlock; + } + } + + /* clear status, really interrupt status ( are off), + but we use the bit anyway */ + ret =3D 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, + "i2c_write_command failed in %s, err =3D %d\n", + __func__, ret); + goto out_unlock; /* have no data, so return failure */ + } + + /* extract ALS/lux data */ + ch0 =3D le16_to_cpup((const __le16 *)&buf[0]); + ch1 =3D le16_to_cpup((const __le16 *)&buf[2]); + + chip->als_cur_info.als_ch0 =3D ch0; + chip->als_cur_info.als_ch1 =3D ch1; + + if ((ch0 >=3D chip->als_saturation) || (ch1 >=3D chip->als_saturation)) { + lux =3D TSL2X7X_LUX_CALC_OVER_FLOW; + goto return_max; + } + + if (ch0 =3D=3D 0) { + /* have no data, so return LAST VALUE */ + ret =3D chip->als_cur_info.lux =3D 0; + goto out_unlock; + } + /* calculate ratio */ + ratio =3D (ch1 << 15) / ch0; + /* convert to unscaled lux using the pointer to the table */ + p =3D (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux; + while (p->ratio !=3D 0 && p->ratio < ratio) + p++; + + if (p->ratio =3D=3D 0) { + lux =3D 0; + } else { + ch0lux =3D DIV_ROUND_UP((ch0 * p->ch0), + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]); + ch1lux =3D DIV_ROUND_UP((ch1 * p->ch1), + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]); + lux =3D ch0lux - ch1lux; + } + + /* note: lux is 31 bit max at this point */ + if (ch1lux > ch0lux) { + dev_dbg(&chip->client->dev, "Returning last value\n"); + ret =3D chip->als_cur_info.lux; + goto out_unlock; + } + + /* adjust for active time scale */ + if (chip->als_time_scale =3D=3D 0) + lux =3D 0; + else + lux =3D (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 =3D lux; + lux64 =3D lux64 * chip->tsl2x7x_settings.als_gain_trim; + lux64 >>=3D 8; + lux =3D lux64; + lux =3D (lux + 500) / 1000; + + if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */ + lux =3D TSL2X7X_LUX_CALC_OVER_FLOW; + + /* Update the structure with the latest lux. */ +return_max: + chip->als_cur_info.lux =3D lux; + ret =3D 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 accordingl= y. + */ +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 =3D iio_priv(indio_dev); + + if (mutex_trylock(&chip->prox_mutex) =3D=3D 0) { + dev_err(&chip->client->dev, + "%s: Can't get prox mutex\n", __func__); + return -EBUSY; + } + + err_cnt =3D 0; + +try_again: + + ret =3D tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: i2c err=3D%d\n", __func__, ret); + goto prox_poll_err; + } + + if (chip->id < tsl2572) { + if (!(status & TSL2X7X_STA_ADC_VALID)) { + err_cnt++; + if (err_cnt > CONSECUTIVE_RETRIES) { + dev_err(&chip->client->dev, + "%s: Consec. retries exceeded\n", __func__); + goto prox_poll_err; + } + goto try_again; + } + } else { + if (!(status & TSL2X7X_STA_PRX_VALID)) { + err_cnt++; + if (err_cnt > CONSECUTIVE_RETRIES) { + dev_err(&chip->client->dev, + "%s: Consec. retries exceeded\n", __func__); + goto prox_poll_err; + } + goto try_again; + } + } + + for (i =3D 0; i < 2; i++) { + ret =3D tsl2x7x_i2c_read(chip->client, + (TSL2X7X_CMD_REG | + (TSL2X7X_PRX_LO + i)), &chdata[i]); + if (ret < 0) + goto prox_poll_err; + } + + chip->prox_cur_info.prox_data =3D (chdata[1]<<8)|chdata[0]; + if (chip->prox_cur_info.prox_data =3D=3D 0) + goto try_again; + + if (chip->prox_cur_info.prox_data >=3D + chip->tsl2x7x_settings.prox_thres_high) + chip->prox_cur_info.prox_event =3D 1; + else + chip->prox_cur_info.prox_event =3D 0; + + mutex_unlock(&chip->prox_mutex); + return chip->prox_cur_info.prox_event; + +prox_poll_err: + mutex_unlock(&chip->prox_mutex); + + return ret; +} + +/* + * Provides initial operational parameter defaults. + * These defaults may be changed through the device's sysfs files. + */ +static void tsl2x7x_defaults(struct tsl2X7X_chip *chip) +{ + /* If Operational settings defined elsewhere.. */ + if (chip->pdata && chip->pdata->platform_default_settings !=3D 0) + memcpy(&(chip->tsl2x7x_settings), + chip->pdata->platform_default_settings, + sizeof(tsl2x7x_default_settings)); + else + memcpy(&(chip->tsl2x7x_settings), + &tsl2x7x_default_settings, + sizeof(tsl2x7x_default_settings)); + + /* Load up the proper lux table. */ + if (chip->pdata && chip->pdata->platform_lux_table[0].ratio !=3D 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 =3D iio_priv(indio_dev); + u8 reg_val; + int gain_trim_val; + int ret; + int lux_val; + + ret =3D i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to write CNTRL register, ret=3D%d\n", + __func__, ret); + return ret; + } + + reg_val =3D i2c_smbus_read_byte(chip->client); + if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) + !=3D (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) { + dev_err(&chip->client->dev, + "%s: failed: ADC not enabled\n", __func__); + return -1; + } + + ret =3D i2c_smbus_write_byte(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed to write ctrl reg: ret=3D%d\n", + __func__, ret); + return ret; + } + + reg_val =3D i2c_smbus_read_byte(chip->client); + if ((reg_val & TSL2X7X_STA_ADC_VALID) !=3D TSL2X7X_STA_ADC_VALID) { + dev_err(&chip->client->dev, + "%s: failed: STATUS - ADC not valid.\n", __func__); + return -ENODATA; + } + + lux_val =3D tsl2x7x_get_lux(indio_dev); + if (lux_val < 0) { + dev_err(&chip->client->dev, + "%s: failed to get lux\n", __func__); + return lux_val; + } + + gain_trim_val =3D (((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 =3D 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 =3D 0; + u8 *dev_reg; + u8 utmp; + int als_count; + int als_time; + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + u8 reg_val =3D 0; + + if (chip->pdata && chip->pdata->power_on) + chip->pdata->power_on(indio_dev); + + /* Non calculated parameters */ + chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =3D + chip->tsl2x7x_settings.prx_time; + chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =3D + chip->tsl2x7x_settings.wait_time; + chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =3D + chip->tsl2x7x_settings.prox_config; + + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =3D + (chip->tsl2x7x_settings.als_thresh_low) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =3D + (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =3D + (chip->tsl2x7x_settings.als_thresh_high) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =3D + (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF; + chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =3D + chip->tsl2x7x_settings.als_persistence; + + chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =3D + chip->tsl2x7x_settings.prox_pulse_count; + chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =3D + chip->tsl2x7x_settings.prox_thres_low; + chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =3D + chip->tsl2x7x_settings.prox_thres_high; + + /* and make sure we're not already on */ + if (chip->tsl2x7x_chip_status =3D=3D 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 =3D (chip->tsl2x7x_settings.als_time * 100 + 135) / 270; + if (als_count =3D=3D 0) + als_count =3D 1; /* ensure at least one cycle */ + + /* convert back to time (encompasses overrides) */ + als_time =3D (als_count * 27 + 5) / 10; + chip->tsl2x7x_config[TSL2X7X_ALS_TIME] =3D 256 - als_count; + + /* Set the gain based on tsl2x7x_settings struct */ + chip->tsl2x7x_config[TSL2X7X_GAIN] =3D + (chip->tsl2x7x_settings.als_gain | + (TSL2X7X_mA100 | TSL2X7X_DIODE1) + | ((chip->tsl2x7x_settings.prox_gain) << 2)); + + /* set chip struct re scaling and saturation */ + chip->als_saturation =3D als_count * 922; /* 90% of full scale */ + chip->als_time_scale =3D (als_time + 25) / 50; + + /* TSL2X7X Specific power-on / adc enable sequence + * Power on the device 1st. */ + utmp =3D TSL2X7X_CNTL_PWR_ON; + ret =3D i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on CNTRL reg.\n", __func__); + return -1; + } + + /* Use the following shadow copy for our delay before enabling ADC. + * Write all the registers. */ + for (i =3D 0, dev_reg =3D chip->tsl2x7x_config; + i < TSL2X7X_MAX_CONFIG_REG; i++) { + ret =3D i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG + i, *dev_reg++); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on write to reg %d.\n", __func__, i); + return ret; + } + } + + udelay(3000); /* Power-on settling time */ + + /* NOW enable the ADC + * initialize the desired mode of operation */ + utmp =3D TSL2X7X_CNTL_PWR_ON | + TSL2X7X_CNTL_ADC_ENBL | + TSL2X7X_CNTL_PROX_DET_ENBL; + ret =3D i2c_smbus_write_byte_data(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed on 2nd CTRL reg.\n", __func__); + return ret; + } + + chip->tsl2x7x_chip_status =3D TSL2X7X_CHIP_WORKING; + + if (chip->tsl2x7x_settings.interrupts_en !=3D 0) { + dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n"); + + reg_val =3D TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL; + if ((chip->tsl2x7x_settings.interrupts_en =3D=3D 0x20) || + (chip->tsl2x7x_settings.interrupts_en =3D=3D 0x30)) + reg_val |=3D TSL2X7X_CNTL_PROX_DET_ENBL; + + reg_val |=3D chip->tsl2x7x_settings.interrupts_en; + ret =3D i2c_smbus_write_byte_data(chip->client, + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val); + if (ret < 0) + dev_err(&chip->client->dev, + "%s: failed in tsl2x7x_IOCTL_INT_SET.\n", + __func__); + + /* Clear out any initial interrupts */ + ret =3D i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INT_CLR); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: failed in tsl2x7x_chip_on\n", + __func__); + return ret; + } + } + + return ret; +} + +static int tsl2x7x_chip_off(struct iio_dev *indio_dev) +{ + int ret; + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + /* turn device off */ + chip->tsl2x7x_chip_status =3D TSL2X7X_CHIP_SUSPENDED; + + ret =3D 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; +} + +/* + * 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 =3D=3D 0) + length =3D 1; + + sum =3D 0; + min =3D INT_MAX; + max =3D INT_MIN; + for (i =3D 0; i < length; i++) { + sum +=3D data[i]; + if (data[i] < min) + min =3D data[i]; + if (data[i] > max) + max =3D data[i]; + } + mean =3D sum/length; + statP->min =3D min; + statP->max =3D max; + statP->mean =3D mean; + + sum =3D 0; + for (i =3D 0; i < length; i++) { + tmp =3D data[i]-mean; + sum +=3D tmp * tmp; + } + stddev =3D int_sqrt((long)sum)/length; + statP->stddev =3D 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 =3D iio_priv(indio_dev); + u8 tmp_irq_settings; + u8 current_state =3D chip->tsl2x7x_chip_status; + + if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) { + dev_err(&chip->client->dev, + "%s: max prox samples cal is too big: %d\n", + __func__, chip->tsl2x7x_settings.prox_max_samples_cal); + chip->tsl2x7x_settings.prox_max_samples_cal =3D 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 =3D chip->tsl2x7x_settings.interrupts_en; + chip->tsl2x7x_settings.interrupts_en |=3D TSL2X7X_CNTL_PROX_INT_ENBL; + + /*turn on device if not already on*/ + tsl2x7x_chip_on(indio_dev); + + /*gather the samples*/ + for (i =3D 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) { + mdelay(15); + tsl2x7x_prox_poll(indio_dev); + prox_history[i] =3D chip->prox_cur_info.prox_data; + dev_info(&chip->client->dev, "2 i=3D%d prox data=3D %d\n", + i, chip->prox_cur_info.prox_data); + } + + tsl2x7x_chip_off(indio_dev); + calP =3D &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 =3D (calP->max << 1) - calP->mean; + + dev_info(&chip->client->dev, " cal min=3D%d mean=3D%d max=3D%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 =3D tmp_irq_settings; + if (current_state =3D=3D TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_on(indio_dev); +} + +static ssize_t tsl2x7x_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + 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 *indio_dev =3D dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (!value) + tsl2x7x_chip_off(indio_dev); + else + tsl2x7x_chip_on(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_gain_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + if (chip->id > tsl2771) + 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_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 *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + 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 *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + 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 =3D value; + + return len; +} + +static IIO_CONST_ATTR(illuminance0_integration_time_available, + "50 100 150 200 250 300 350 400 450 500 550 600 650"); + +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + 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 *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value) + chip->tsl2x7x_settings.als_cal_target =3D value; + + return len; +} + +/* 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 *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + return snprintf(buf, PAGE_SIZE, "%d\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 *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + unsigned long value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + chip->tsl2x7x_settings.als_persistence =3D value; + + return len; +} + +static IIO_CONST_ATTR(sampling_frequency_available, + "0x00 - 0xFF (0 - 255)"); + +static ssize_t tsl2x7x_do_calibrate(struct device *dev, + struct device_attribute *attr, const char *buf, size_t len) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_als_calibrate(indio_dev); + + return len; +} + +static ssize_t tsl2x7x_luxtable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + int i; + int offset =3D 0; + + i =3D 0; + while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) { + offset +=3D 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 =3D=3D 0) { + /* We just printed the first "0" entry. + * Now get rid of the extra "," and break. */ + offset--; + break; + } + i++; + } + + offset +=3D 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 *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + 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 =3D 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]=3D%d\n", n); + return -EINVAL; + } + + if ((value[(n - 2)] | value[(n - 1)] | value[n]) !=3D 0) { + dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=3D%d\n", n); + return -EINVAL; + } + + if (chip->tsl2x7x_chip_status =3D=3D TSL2X7X_CHIP_WORKING) + tsl2x7x_chip_off(indio_dev); + + /* 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 *indio_dev =3D dev_get_drvdata(dev); + bool value; + + if (strtobool(buf, &value)) + return -EINVAL; + + if (value) + tsl2x7x_prox_cal(indio_dev); + + return len; +} + +static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev, + u64 event_code) +{ + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + int ret; + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) =3D=3D IIO_LIGHT) + ret =3D !!(chip->tsl2x7x_settings.interrupts_en & 0x10); + else + ret =3D !!(chip->tsl2x7x_settings.interrupts_en & 0x20); + + return ret; +} + +static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) =3D=3D IIO_LIGHT) { + if (val) + chip->tsl2x7x_settings.interrupts_en |=3D 0x10; + else + chip->tsl2x7x_settings.interrupts_en &=3D 0x20; + } else { + if (val) + chip->tsl2x7x_settings.interrupts_en |=3D 0x20; + else + chip->tsl2x7x_settings.interrupts_en &=3D 0x10; + } + + return 0; +} + +static int tsl2x7x_write_thresh(struct iio_dev *indio_dev, + u64 event_code, + int val) +{ + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) =3D=3D IIO_LIGHT) { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + chip->tsl2x7x_settings.als_thresh_high =3D val; + break; + case IIO_EV_DIR_FALLING: + chip->tsl2x7x_settings.als_thresh_low =3D val; + break; + default: + return -EINVAL; + } + } else { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + chip->tsl2x7x_settings.prox_thres_high =3D val; + break; + case IIO_EV_DIR_FALLING: + chip->tsl2x7x_settings.prox_thres_low =3D val; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int tsl2x7x_read_thresh(struct iio_dev *indio_dev, + u64 event_code, + int *val) +{ + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) =3D=3D IIO_LIGHT) { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val =3D chip->tsl2x7x_settings.als_thresh_high; + break; + case IIO_EV_DIR_FALLING: + *val =3D chip->tsl2x7x_settings.als_thresh_low; + break; + default: + return -EINVAL; + } + } else { + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) { + case IIO_EV_DIR_RISING: + *val =3D chip->tsl2x7x_settings.prox_thres_high; + break; + case IIO_EV_DIR_FALLING: + *val =3D chip->tsl2x7x_settings.prox_thres_low; + break; + default: + return -EINVAL; + } + } + + return 0; +} + +static int tsl2x7x_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long mask) +{ + int ret =3D -EINVAL; + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + switch (mask) { + case 0: + switch (chan->type) { + case IIO_LIGHT: + tsl2x7x_get_lux(indio_dev); + if (chan->processed_val) + *val =3D chip->als_cur_info.lux; + else + *val =3D (((chip->als_cur_info.als_ch0 << 16) | + chip->als_cur_info.als_ch1)); + ret =3D IIO_VAL_INT; + break; + case IIO_PROXIMITY: + tsl2x7x_prox_poll(indio_dev); + if (chan->processed_val) + *val =3D chip->prox_cur_info.prox_event; + else + *val =3D chip->prox_cur_info.prox_data; + ret =3D IIO_VAL_INT; + break; + default: + return -EINVAL; + break; + } + break; + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type =3D=3D IIO_LIGHT) + *val =3D + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]; + else + *val =3D + tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain]; + ret =3D IIO_VAL_INT; + break; + case IIO_CHAN_INFO_CALIBBIAS: + *val =3D chip->tsl2x7x_settings.als_gain_trim; + ret =3D IIO_VAL_INT; + break; + + default: + ret =3D -EINVAL; + } + + return ret; +} + +static int tsl2x7x_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_CALIBSCALE: + if (chan->type =3D=3D IIO_LIGHT) { + switch (val) { + case 1: + chip->tsl2x7x_settings.als_gain =3D 0; + break; + case 8: + chip->tsl2x7x_settings.als_gain =3D 1; + break; + case 16: + chip->tsl2x7x_settings.als_gain =3D 2; + break; + case 120: + if (chip->id > tsl2771) + return -EINVAL; + chip->tsl2x7x_settings.als_gain =3D 3; + break; + case 128: + if (chip->id < tsl2572) + return -EINVAL; + chip->tsl2x7x_settings.als_gain =3D 3; + break; + default: + return -EINVAL; + } + } else { + switch (val) { + case 1: + chip->tsl2x7x_settings.prox_gain =3D 0; + break; + case 2: + chip->tsl2x7x_settings.prox_gain =3D 1; + break; + case 4: + chip->tsl2x7x_settings.prox_gain =3D 2; + break; + case 8: + chip->tsl2x7x_settings.prox_gain =3D 3; + break; + default: + return -EINVAL; + } + } + break; + case IIO_CHAN_INFO_CALIBBIAS: + chip->tsl2x7x_settings.als_gain_trim =3D val; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, + tsl2x7x_power_state_show, tsl2x7x_power_state_store); + +static DEVICE_ATTR(proximity_calibscale_available, S_IRUGO, + tsl2x7x_prox_gain_available_show, NULL); + +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_target_input, S_IRUGO | S_IWUSR, + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store); + +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(sampling_frequency, S_IRUGO | S_IWUSR, + tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store); + +/* Use the default register values to identify the Taos device */ +static int tsl2x7x_device_id(unsigned char *id, int target) +{ + switch (target) { + case tsl2571: + case tsl2671: + case tsl2771: + return ((*id & 0xf0) =3D=3D TRITON_ID); + break; + case tmd2671: + case tmd2771: + return ((*id & 0xf0) =3D=3D HALIBUT_ID); + break; + case tsl2572: + case tsl2672: + case tmd2672: + case tsl2772: + case tmd2772: + return ((*id & 0xf0) =3D=3D SWORDFISH_ID); + break; + } + + return -EINVAL; +} + +/* + * Interrupt Event Handler */ +static irqreturn_t tsl2x7x_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev =3D private; + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + s64 timestamp =3D iio_get_time_ns(); + int ret; + int value; + + value =3D 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 =3D i2c_smbus_write_byte(chip->client, + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN | + TSL2X7X_CMD_PROXALS_INT_CLR); + if (ret < 0) + dev_err(&chip->client->dev, + "%s: Failed to clear irq from event handler. err =3D %d\n", + __func__, ret); + + return IRQ_HANDLED; +} + +static struct attribute *tsl2x7x_ALS_device_attrs[] =3D { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr, + &dev_attr_illuminance0_target_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL +}; + +static struct attribute *tsl2x7x_PRX_device_attrs[] =3D { + &dev_attr_power_state.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2x7x_ALSPRX_device_attrs[] =3D { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr, + &dev_attr_illuminance0_target_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + NULL +}; + +static struct attribute *tsl2x7x_PRX2_device_attrs[] =3D { + &dev_attr_power_state.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + &dev_attr_proximity_calibscale_available.attr, + NULL +}; + +static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] =3D { + &dev_attr_power_state.attr, + &dev_attr_illuminance0_calibscale_available.attr, + &dev_attr_illuminance0_integration_time.attr, + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr, + &dev_attr_illuminance0_target_input.attr, + &dev_attr_illuminance0_calibrate.attr, + &dev_attr_illuminance0_lux_table.attr, + &dev_attr_sampling_frequency.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &dev_attr_proximity_calibrate.attr, + &dev_attr_proximity_calibscale_available.attr, + NULL +}; + +static const struct attribute_group tsl2X7X_device_attr_group_tbl[] =3D { + [ALS] =3D { + .attrs =3D tsl2x7x_ALS_device_attrs, + }, + [PRX] =3D { + .attrs =3D tsl2x7x_PRX_device_attrs, + }, + [ALSPRX] =3D { + .attrs =3D tsl2x7x_ALSPRX_device_attrs, + }, + [PRX2] =3D { + .attrs =3D tsl2x7x_PRX2_device_attrs, + }, + [ALSPRX2] =3D { + .attrs =3D tsl2x7x_ALSPRX2_device_attrs, + }, +}; + +static const struct iio_info tsl2X7X_device_info[] =3D { + [ALS] =3D { + .attrs =3D &tsl2X7X_device_attr_group_tbl[ALS], + .driver_module =3D THIS_MODULE, + .read_raw =3D &tsl2x7x_read_raw, + .write_raw =3D &tsl2x7x_write_raw, + .read_event_value =3D &tsl2x7x_read_thresh, + .write_event_value =3D &tsl2x7x_write_thresh, + .read_event_config =3D &tsl2x7x_read_interrupt_config, + .write_event_config =3D &tsl2x7x_write_interrupt_config, + }, + [PRX] =3D { + .attrs =3D &tsl2X7X_device_attr_group_tbl[PRX], + .driver_module =3D THIS_MODULE, + .read_raw =3D &tsl2x7x_read_raw, + .write_raw =3D &tsl2x7x_write_raw, + .read_event_value =3D &tsl2x7x_read_thresh, + .write_event_value =3D &tsl2x7x_write_thresh, + .read_event_config =3D &tsl2x7x_read_interrupt_config, + .write_event_config =3D &tsl2x7x_write_interrupt_config, + }, + [ALSPRX] =3D { + .attrs =3D &tsl2X7X_device_attr_group_tbl[ALSPRX], + .driver_module =3D THIS_MODULE, + .read_raw =3D &tsl2x7x_read_raw, + .write_raw =3D &tsl2x7x_write_raw, + .read_event_value =3D &tsl2x7x_read_thresh, + .write_event_value =3D &tsl2x7x_write_thresh, + .read_event_config =3D &tsl2x7x_read_interrupt_config, + .write_event_config =3D &tsl2x7x_write_interrupt_config, + }, + [PRX2] =3D { + .attrs =3D &tsl2X7X_device_attr_group_tbl[PRX2], + .driver_module =3D THIS_MODULE, + .read_raw =3D &tsl2x7x_read_raw, + .write_raw =3D &tsl2x7x_write_raw, + .read_event_value =3D &tsl2x7x_read_thresh, + .write_event_value =3D &tsl2x7x_write_thresh, + .read_event_config =3D &tsl2x7x_read_interrupt_config, + .write_event_config =3D &tsl2x7x_write_interrupt_config, + }, + [ALSPRX2] =3D { + .attrs =3D &tsl2X7X_device_attr_group_tbl[ALSPRX2], + .driver_module =3D THIS_MODULE, + .read_raw =3D &tsl2x7x_read_raw, + .write_raw =3D &tsl2x7x_write_raw, + .read_event_value =3D &tsl2x7x_read_thresh, + .write_event_value =3D &tsl2x7x_write_thresh, + .read_event_config =3D &tsl2x7x_read_interrupt_config, + .write_event_config =3D &tsl2x7x_write_interrupt_config, + }, +}; + +static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] =3D { + [ALS] =3D { + .channel =3D { + [0] =3D { + .type =3D IIO_LIGHT, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [1] =3D { + .type =3D IIO_LIGHT, + .indexed =3D 1, + .channel =3D 0, + .info_mask =3D + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + }, + .num_channels =3D 2, + .info =3D &tsl2X7X_device_info[ALS], + }, + [PRX] =3D { + .channel =3D { + [0] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [1] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + }, + .num_channels =3D 2, + .info =3D &tsl2X7X_device_info[PRX], + }, + [ALSPRX] =3D { + .channel =3D { + [0] =3D { + .type =3D IIO_LIGHT, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [1] =3D { + .type =3D IIO_LIGHT, + .indexed =3D 1, + .channel =3D 0, + .info_mask =3D + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + [2] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [3] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 0, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + }, + .num_channels =3D 4, + .info =3D &tsl2X7X_device_info[ALSPRX], + }, + [PRX2] =3D { + .channel =3D { + [0] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [1] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .info_mask =3D + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + }, + .num_channels =3D 2, + .info =3D &tsl2X7X_device_info[PRX2], + }, + [ALSPRX2] =3D { + .channel =3D { + [0] =3D { + .type =3D IIO_LIGHT, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [1] =3D { + .type =3D IIO_LIGHT, + .indexed =3D 1, + .channel =3D 0, + .info_mask =3D + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + [2] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .processed_val =3D 1, + }, + [3] =3D { + .type =3D IIO_PROXIMITY, + .indexed =3D 1, + .channel =3D 0, + .info_mask =3D + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT, + .event_mask =3D TSL2X7X_EVENT_MASK + }, + }, + .num_channels =3D 4, + .info =3D &tsl2X7X_device_info[ALSPRX2], + }, +}; + +/* + * Client probe function. + */ +static int __devinit tsl2x7x_probe(struct i2c_client *clientp, + const struct i2c_device_id *id) +{ + int ret; + unsigned char device_id; + struct iio_dev *indio_dev; + struct tsl2X7X_chip *chip; + + indio_dev =3D iio_allocate_device(sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + chip =3D iio_priv(indio_dev); + chip->client =3D clientp; + i2c_set_clientdata(clientp, indio_dev); + + ret =3D tsl2x7x_i2c_read(chip->client, + TSL2X7X_CHIPID, &device_id); + if (ret < 0) + goto fail1; + + if ((!tsl2x7x_device_id(&device_id, id->driver_data)) || + (tsl2x7x_device_id(&device_id, id->driver_data) =3D=3D -EINVAL)) { + dev_info(&chip->client->dev, + "i2c device found does not match expected id in %s\n", + __func__); + goto fail1; + } + + ret =3D i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL)); + if (ret < 0) { + dev_err(&clientp->dev, "%s: write to cmd reg failed. err =3D %d\n", + __func__, ret); + goto fail1; + } + + /* ALS and PROX functions can be invoked via user space poll + * or H/W interrupt. If busy return last sample. */ + mutex_init(&chip->als_mutex); + mutex_init(&chip->prox_mutex); + + chip->tsl2x7x_chip_status =3D TSL2X7X_CHIP_UNKNOWN; + chip->pdata =3D clientp->dev.platform_data; + chip->id =3D id->driver_data; + chip->chip_info =3D + &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]]; + + indio_dev->info =3D chip->chip_info->info; + indio_dev->dev.parent =3D &clientp->dev; + indio_dev->modes =3D INDIO_DIRECT_MODE; + indio_dev->name =3D chip->client->name; + indio_dev->channels =3D chip->chip_info->channel; + indio_dev->num_channels =3D chip->chip_info->num_channels; + + if (clientp->irq) { + ret =3D request_threaded_irq(clientp->irq, + NULL, + &tsl2x7x_event_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "TSL2X7X_event", + indio_dev); + if (ret) { + dev_err(&clientp->dev, + "%s: irq request failed", __func__); + goto fail2; + } + } + + /* Load up the defaults */ + tsl2x7x_defaults(chip); + /* Make sure the chip is on */ + tsl2x7x_chip_on(indio_dev); + + ret =3D iio_device_register(indio_dev); + if (ret) { + dev_err(&clientp->dev, + "%s: iio registration failed\n", __func__); + goto fail3; + } + + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name); + + return 0; + +fail3: + if (clientp->irq) + free_irq(clientp->irq, indio_dev); +fail2: + iio_free_device(indio_dev); +fail1: + kfree(chip); + return ret; +} + +static int tsl2x7x_suspend(struct device *dev) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + int ret =3D 0; + + if (chip->tsl2x7x_chip_status =3D=3D TSL2X7X_CHIP_WORKING) { + ret =3D tsl2x7x_chip_off(indio_dev); + chip->tsl2x7x_chip_status =3D TSL2X7X_CHIP_SUSPENDED; + } + + if (chip->pdata && chip->pdata->platform_power) { + pm_message_t pmm =3D {PM_EVENT_SUSPEND}; + chip->pdata->platform_power(dev, pmm); + } + + return ret; +} + +static int tsl2x7x_resume(struct device *dev) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct tsl2X7X_chip *chip =3D iio_priv(indio_dev); + int ret =3D 0; + + if (chip->pdata && chip->pdata->platform_power) { + pm_message_t pmm =3D {PM_EVENT_RESUME}; + chip->pdata->platform_power(dev, pmm); + } + + if (chip->tsl2x7x_chip_status =3D=3D TSL2X7X_CHIP_SUSPENDED) + ret =3D tsl2x7x_chip_on(indio_dev); + + return ret; +} + +static int __devexit tsl2x7x_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev =3D i2c_get_clientdata(client); + struct tsl2X7X_chip *chip =3D i2c_get_clientdata(client); + + tsl2x7x_chip_off(indio_dev); + + if (client->irq) + free_irq(client->irq, chip->client->name); + + iio_free_device(indio_dev); + + return 0; +} + +static struct i2c_device_id tsl2x7x_idtable[] =3D { + { "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 =3D { + .suspend =3D tsl2x7x_suspend, + .resume =3D tsl2x7x_resume, +}; + +/* Driver definition */ +static struct i2c_driver tsl2x7x_driver =3D { + .driver =3D { + .name =3D "tsl2x7x", + .pm =3D &tsl2x7x_pm_ops, + }, + .id_table =3D tsl2x7x_idtable, + .probe =3D tsl2x7x_probe, + .remove =3D __devexit_p(tsl2x7x_remove), +}; + +module_i2c_driver(tsl2x7x_driver); + +MODULE_AUTHOR("J. August Brenner"); +MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity 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..663e846 --- /dev/null +++ b/drivers/staging/iio/light/tsl2x7x_core.h @@ -0,0 +1,75 @@ +/* + * 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 WIT= HOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License f= or + * 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 + +/* Max number of segments allowable in LUX table */ +#define TSL2X7X_MAX_LUX_TABLE_SIZE 9 +#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * TSL2X7X_MAX_LUX_TABLE_SIZE) + +struct iio_dev; +struct iio_chan_spec; + +struct tsl2x7x_lux { + unsigned int ratio; + unsigned int ch0; + unsigned int ch1; +}; + +/* Refer to tsl2x7x_default_settings for member desc. */ +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; +}; + +/* struct tsl2x7x_platform_data - + * Platform unique glass and defaults + * Platform PM functions. */ +struct tsl2X7X_platform_data { + /* Suspend/resume platform cb */ + int (*platform_power)(struct device *dev, pm_message_t); + /* The following callback gets called when the device is powered on */ + int (*power_on) (struct iio_dev *indio_dev); + /* The following callback gets called when the device is powered off */ + int (*power_off) (struct i2c_client *dev); + /* These are the device specific glass coefficents used to + * calculate Lux */ + struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE]; + struct tsl2x7x_settings *platform_default_settings; +}; + +#endif /* __TSL2X7X_H */ -- 1.7.4.1