diff options
Diffstat (limited to 'drivers/staging/iio/accel/adis16240.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16240.c | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c new file mode 100644 index 0000000000..337492785f --- /dev/null +++ b/drivers/staging/iio/accel/adis16240.c @@ -0,0 +1,443 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * ADIS16240 Programmable Impact Sensor and Recorder driver + * + * Copyright 2010 Analog Devices Inc. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/spi/spi.h> +#include <linux/sysfs.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/imu/adis.h> + +#define ADIS16240_STARTUP_DELAY 220 /* ms */ + +/* Flash memory write count */ +#define ADIS16240_FLASH_CNT 0x00 + +/* Output, power supply */ +#define ADIS16240_SUPPLY_OUT 0x02 + +/* Output, x-axis accelerometer */ +#define ADIS16240_XACCL_OUT 0x04 + +/* Output, y-axis accelerometer */ +#define ADIS16240_YACCL_OUT 0x06 + +/* Output, z-axis accelerometer */ +#define ADIS16240_ZACCL_OUT 0x08 + +/* Output, auxiliary ADC input */ +#define ADIS16240_AUX_ADC 0x0A + +/* Output, temperature */ +#define ADIS16240_TEMP_OUT 0x0C + +/* Output, x-axis acceleration peak */ +#define ADIS16240_XPEAK_OUT 0x0E + +/* Output, y-axis acceleration peak */ +#define ADIS16240_YPEAK_OUT 0x10 + +/* Output, z-axis acceleration peak */ +#define ADIS16240_ZPEAK_OUT 0x12 + +/* Output, sum-of-squares acceleration peak */ +#define ADIS16240_XYZPEAK_OUT 0x14 + +/* Output, Capture Buffer 1, X and Y acceleration */ +#define ADIS16240_CAPT_BUF1 0x16 + +/* Output, Capture Buffer 2, Z acceleration */ +#define ADIS16240_CAPT_BUF2 0x18 + +/* Diagnostic, error flags */ +#define ADIS16240_DIAG_STAT 0x1A + +/* Diagnostic, event counter */ +#define ADIS16240_EVNT_CNTR 0x1C + +/* Diagnostic, check sum value from firmware test */ +#define ADIS16240_CHK_SUM 0x1E + +/* Calibration, x-axis acceleration offset adjustment */ +#define ADIS16240_XACCL_OFF 0x20 + +/* Calibration, y-axis acceleration offset adjustment */ +#define ADIS16240_YACCL_OFF 0x22 + +/* Calibration, z-axis acceleration offset adjustment */ +#define ADIS16240_ZACCL_OFF 0x24 + +/* Clock, hour and minute */ +#define ADIS16240_CLK_TIME 0x2E + +/* Clock, month and day */ +#define ADIS16240_CLK_DATE 0x30 + +/* Clock, year */ +#define ADIS16240_CLK_YEAR 0x32 + +/* Wake-up setting, hour and minute */ +#define ADIS16240_WAKE_TIME 0x34 + +/* Wake-up setting, month and day */ +#define ADIS16240_WAKE_DATE 0x36 + +/* Alarm 1 amplitude threshold */ +#define ADIS16240_ALM_MAG1 0x38 + +/* Alarm 2 amplitude threshold */ +#define ADIS16240_ALM_MAG2 0x3A + +/* Alarm control */ +#define ADIS16240_ALM_CTRL 0x3C + +/* Capture, external trigger control */ +#define ADIS16240_XTRIG_CTRL 0x3E + +/* Capture, address pointer */ +#define ADIS16240_CAPT_PNTR 0x40 + +/* Capture, configuration and control */ +#define ADIS16240_CAPT_CTRL 0x42 + +/* General-purpose digital input/output control */ +#define ADIS16240_GPIO_CTRL 0x44 + +/* Miscellaneous control */ +#define ADIS16240_MSC_CTRL 0x46 + +/* Internal sample period (rate) control */ +#define ADIS16240_SMPL_PRD 0x48 + +/* System command */ +#define ADIS16240_GLOB_CMD 0x4A + +/* MSC_CTRL */ + +/* Enables sum-of-squares output (XYZPEAK_OUT) */ +#define ADIS16240_MSC_CTRL_XYZPEAK_OUT_EN BIT(15) + +/* Enables peak tracking output (XPEAK_OUT, YPEAK_OUT, and ZPEAK_OUT) */ +#define ADIS16240_MSC_CTRL_X_Y_ZPEAK_OUT_EN BIT(14) + +/* Self-test enable: 1 = apply electrostatic force, 0 = disabled */ +#define ADIS16240_MSC_CTRL_SELF_TEST_EN BIT(8) + +/* Data-ready enable: 1 = enabled, 0 = disabled */ +#define ADIS16240_MSC_CTRL_DATA_RDY_EN BIT(2) + +/* Data-ready polarity: 1 = active high, 0 = active low */ +#define ADIS16240_MSC_CTRL_ACTIVE_HIGH BIT(1) + +/* Data-ready line selection: 1 = DIO2, 0 = DIO1 */ +#define ADIS16240_MSC_CTRL_DATA_RDY_DIO2 BIT(0) + +/* DIAG_STAT */ + +/* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */ +#define ADIS16240_DIAG_STAT_ALARM2 BIT(9) + +/* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */ +#define ADIS16240_DIAG_STAT_ALARM1 BIT(8) + +/* Capture buffer full: 1 = capture buffer is full */ +#define ADIS16240_DIAG_STAT_CPT_BUF_FUL BIT(7) + +/* Flash test, checksum flag: 1 = mismatch, 0 = match */ +#define ADIS16240_DIAG_STAT_CHKSUM BIT(6) + +/* Power-on, self-test flag: 1 = failure, 0 = pass */ +#define ADIS16240_DIAG_STAT_PWRON_FAIL_BIT 5 + +/* Power-on self-test: 1 = in-progress, 0 = complete */ +#define ADIS16240_DIAG_STAT_PWRON_BUSY BIT(4) + +/* SPI communications failure */ +#define ADIS16240_DIAG_STAT_SPI_FAIL_BIT 3 + +/* Flash update failure */ +#define ADIS16240_DIAG_STAT_FLASH_UPT_BIT 2 + +/* Power supply above 3.625 V */ +#define ADIS16240_DIAG_STAT_POWER_HIGH_BIT 1 + + /* Power supply below 2.225 V */ +#define ADIS16240_DIAG_STAT_POWER_LOW_BIT 0 + +/* GLOB_CMD */ + +#define ADIS16240_GLOB_CMD_RESUME BIT(8) +#define ADIS16240_GLOB_CMD_SW_RESET BIT(7) +#define ADIS16240_GLOB_CMD_STANDBY BIT(2) + +#define ADIS16240_ERROR_ACTIVE BIT(14) + +/* At the moment triggers are only used for ring buffer + * filling. This may change! + */ + +enum adis16240_scan { + ADIS16240_SCAN_ACC_X, + ADIS16240_SCAN_ACC_Y, + ADIS16240_SCAN_ACC_Z, + ADIS16240_SCAN_SUPPLY, + ADIS16240_SCAN_AUX_ADC, + ADIS16240_SCAN_TEMP, +}; + +static ssize_t adis16240_spi_read_signed(struct device *dev, + struct device_attribute *attr, + char *buf, + unsigned int bits) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct adis *st = iio_priv(indio_dev); + int ret; + s16 val = 0; + unsigned int shift = 16 - bits; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + + ret = adis_read_reg_16(st, + this_attr->address, (u16 *)&val); + if (ret) + return ret; + + if (val & ADIS16240_ERROR_ACTIVE) + adis_check_status(st); + + val = (s16)(val << shift) >> shift; + return sprintf(buf, "%d\n", val); +} + +static ssize_t adis16240_read_12bit_signed(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return adis16240_spi_read_signed(dev, attr, buf, 12); +} + +static IIO_DEVICE_ATTR(in_accel_xyz_squared_peak_raw, 0444, + adis16240_read_12bit_signed, NULL, + ADIS16240_XYZPEAK_OUT); + +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("4096"); + +static const u8 adis16240_addresses[][2] = { + [ADIS16240_SCAN_ACC_X] = { ADIS16240_XACCL_OFF, ADIS16240_XPEAK_OUT }, + [ADIS16240_SCAN_ACC_Y] = { ADIS16240_YACCL_OFF, ADIS16240_YPEAK_OUT }, + [ADIS16240_SCAN_ACC_Z] = { ADIS16240_ZACCL_OFF, ADIS16240_ZPEAK_OUT }, +}; + +static int adis16240_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + struct adis *st = iio_priv(indio_dev); + int ret; + u8 addr; + s16 val16; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + return adis_single_conversion(indio_dev, chan, + ADIS16240_ERROR_ACTIVE, val); + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_VOLTAGE: + if (chan->channel == 0) { + *val = 4; + *val2 = 880000; /* 4.88 mV */ + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; + case IIO_TEMP: + *val = 244; /* 0.244 C */ + *val2 = 0; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_ACCEL: + *val = 0; + *val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */ + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + break; + case IIO_CHAN_INFO_PEAK_SCALE: + *val = 0; + *val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */ + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + *val = 25000 / 244 - 0x133; /* 25 C = 0x133 */ + return IIO_VAL_INT; + case IIO_CHAN_INFO_CALIBBIAS: + addr = adis16240_addresses[chan->scan_index][0]; + ret = adis_read_reg_16(st, addr, &val16); + if (ret) + return ret; + *val = sign_extend32(val16, 9); + return IIO_VAL_INT; + case IIO_CHAN_INFO_PEAK: + addr = adis16240_addresses[chan->scan_index][1]; + ret = adis_read_reg_16(st, addr, &val16); + if (ret) + return ret; + *val = sign_extend32(val16, 9); + return IIO_VAL_INT; + } + return -EINVAL; +} + +static int adis16240_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + struct adis *st = iio_priv(indio_dev); + u8 addr; + + switch (mask) { + case IIO_CHAN_INFO_CALIBBIAS: + addr = adis16240_addresses[chan->scan_index][0]; + return adis_write_reg_16(st, addr, val & GENMASK(9, 0)); + } + return -EINVAL; +} + +static const struct iio_chan_spec adis16240_channels[] = { + ADIS_SUPPLY_CHAN(ADIS16240_SUPPLY_OUT, ADIS16240_SCAN_SUPPLY, 0, 10), + ADIS_AUX_ADC_CHAN(ADIS16240_AUX_ADC, ADIS16240_SCAN_AUX_ADC, 0, 10), + ADIS_ACCEL_CHAN(X, ADIS16240_XACCL_OUT, ADIS16240_SCAN_ACC_X, + BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK), + 0, 10), + ADIS_ACCEL_CHAN(Y, ADIS16240_YACCL_OUT, ADIS16240_SCAN_ACC_Y, + BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK), + 0, 10), + ADIS_ACCEL_CHAN(Z, ADIS16240_ZACCL_OUT, ADIS16240_SCAN_ACC_Z, + BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK), + 0, 10), + ADIS_TEMP_CHAN(ADIS16240_TEMP_OUT, ADIS16240_SCAN_TEMP, 0, 10), + IIO_CHAN_SOFT_TIMESTAMP(6) +}; + +static struct attribute *adis16240_attributes[] = { + &iio_dev_attr_in_accel_xyz_squared_peak_raw.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group adis16240_attribute_group = { + .attrs = adis16240_attributes, +}; + +static const struct iio_info adis16240_info = { + .attrs = &adis16240_attribute_group, + .read_raw = adis16240_read_raw, + .write_raw = adis16240_write_raw, + .update_scan_mode = adis_update_scan_mode, +}; + +static const char * const adis16240_status_error_msgs[] = { + [ADIS16240_DIAG_STAT_PWRON_FAIL_BIT] = "Power on, self-test failed", + [ADIS16240_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure", + [ADIS16240_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed", + [ADIS16240_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V", + [ADIS16240_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.225V", +}; + +static const struct adis_timeout adis16240_timeouts = { + .reset_ms = ADIS16240_STARTUP_DELAY, + .sw_reset_ms = ADIS16240_STARTUP_DELAY, + .self_test_ms = ADIS16240_STARTUP_DELAY, +}; + +static const struct adis_data adis16240_data = { + .write_delay = 35, + .read_delay = 35, + .msc_ctrl_reg = ADIS16240_MSC_CTRL, + .glob_cmd_reg = ADIS16240_GLOB_CMD, + .diag_stat_reg = ADIS16240_DIAG_STAT, + + .self_test_mask = ADIS16240_MSC_CTRL_SELF_TEST_EN, + .self_test_reg = ADIS16240_MSC_CTRL, + .self_test_no_autoclear = true, + .timeouts = &adis16240_timeouts, + + .status_error_msgs = adis16240_status_error_msgs, + .status_error_mask = BIT(ADIS16240_DIAG_STAT_PWRON_FAIL_BIT) | + BIT(ADIS16240_DIAG_STAT_SPI_FAIL_BIT) | + BIT(ADIS16240_DIAG_STAT_FLASH_UPT_BIT) | + BIT(ADIS16240_DIAG_STAT_POWER_HIGH_BIT) | + BIT(ADIS16240_DIAG_STAT_POWER_LOW_BIT), +}; + +static int adis16240_probe(struct spi_device *spi) +{ + int ret; + struct adis *st; + struct iio_dev *indio_dev; + + /* setup the industrialio driver allocated elements */ + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + st = iio_priv(indio_dev); + /* this is only used for removal purposes */ + spi_set_drvdata(spi, indio_dev); + + indio_dev->name = spi->dev.driver->name; + indio_dev->info = &adis16240_info; + indio_dev->channels = adis16240_channels; + indio_dev->num_channels = ARRAY_SIZE(adis16240_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + spi->mode = SPI_MODE_3; + ret = spi_setup(spi); + if (ret) { + dev_err(&spi->dev, "spi_setup failed!\n"); + return ret; + } + + ret = adis_init(st, indio_dev, spi, &adis16240_data); + if (ret) + return ret; + ret = devm_adis_setup_buffer_and_trigger(st, indio_dev, NULL); + if (ret) + return ret; + + /* Get the device into a sane initial state */ + ret = __adis_initial_startup(st); + if (ret) + return ret; + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static const struct of_device_id adis16240_of_match[] = { + { .compatible = "adi,adis16240" }, + { }, +}; +MODULE_DEVICE_TABLE(of, adis16240_of_match); + +static struct spi_driver adis16240_driver = { + .driver = { + .name = "adis16240", + .of_match_table = adis16240_of_match, + }, + .probe = adis16240_probe, +}; +module_spi_driver(adis16240_driver); + +MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); +MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("spi:adis16240"); +MODULE_IMPORT_NS(IIO_ADISLIB); |