/* * ADIS16204 Programmable High-g Digital Impact Sensor and Recorder * * Copyright 2010 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "adis16204.h" /* Unique to this driver currently */ static const u8 adis16204_addresses[][2] = { [ADIS16204_SCAN_ACC_X] = { ADIS16204_XACCL_NULL, ADIS16204_X_PEAK_OUT }, [ADIS16204_SCAN_ACC_Y] = { ADIS16204_YACCL_NULL, ADIS16204_Y_PEAK_OUT }, [ADIS16204_SCAN_ACC_XY] = { 0, ADIS16204_XY_PEAK_OUT }, }; static int adis16204_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; int bits; u8 addr; s16 val16; int addrind; switch (mask) { case IIO_CHAN_INFO_RAW: return adis_single_conversion(indio_dev, chan, ADIS16204_ERROR_ACTIVE, val); case IIO_CHAN_INFO_SCALE: switch (chan->type) { case IIO_VOLTAGE: if (chan->channel == 0) { *val = 1; *val2 = 220000; /* 1.22 mV */ } else { *val = 0; *val2 = 610000; /* 0.61 mV */ } return IIO_VAL_INT_PLUS_MICRO; case IIO_TEMP: *val = -470; /* 0.47 C */ *val2 = 0; return IIO_VAL_INT_PLUS_MICRO; case IIO_ACCEL: *val = 0; switch (chan->channel2) { case IIO_MOD_X: case IIO_MOD_ROOT_SUM_SQUARED_X_Y: *val2 = IIO_G_TO_M_S_2(17125); /* 17.125 mg */ break; case IIO_MOD_Y: case IIO_MOD_Z: *val2 = IIO_G_TO_M_S_2(8407); /* 8.407 mg */ break; } return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } break; case IIO_CHAN_INFO_OFFSET: *val = 25000 / -470 - 1278; /* 25 C = 1278 */ return IIO_VAL_INT; case IIO_CHAN_INFO_CALIBBIAS: case IIO_CHAN_INFO_PEAK: if (mask == IIO_CHAN_INFO_CALIBBIAS) { bits = 12; addrind = 0; } else { /* PEAK_SEPARATE */ bits = 14; addrind = 1; } mutex_lock(&indio_dev->mlock); addr = adis16204_addresses[chan->scan_index][addrind]; ret = adis_read_reg_16(st, addr, &val16); if (ret) { mutex_unlock(&indio_dev->mlock); return ret; } val16 &= (1 << bits) - 1; val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); *val = val16; mutex_unlock(&indio_dev->mlock); return IIO_VAL_INT; } return -EINVAL; } static int adis16204_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); int bits; s16 val16; u8 addr; switch (mask) { case IIO_CHAN_INFO_CALIBBIAS: switch (chan->type) { case IIO_ACCEL: bits = 12; break; default: return -EINVAL; } val16 = val & ((1 << bits) - 1); addr = adis16204_addresses[chan->scan_index][1]; return adis_write_reg_16(st, addr, val16); } return -EINVAL; } static const struct iio_chan_spec adis16204_channels[] = { ADIS_SUPPLY_CHAN(ADIS16204_SUPPLY_OUT, ADIS16204_SCAN_SUPPLY, 0, 12), ADIS_AUX_ADC_CHAN(ADIS16204_AUX_ADC, ADIS16204_SCAN_AUX_ADC, 0, 12), ADIS_TEMP_CHAN(ADIS16204_TEMP_OUT, ADIS16204_SCAN_TEMP, 0, 12), ADIS_ACCEL_CHAN(X, ADIS16204_XACCL_OUT, ADIS16204_SCAN_ACC_X, BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK), 0, 14), ADIS_ACCEL_CHAN(Y, ADIS16204_YACCL_OUT, ADIS16204_SCAN_ACC_Y, BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK), 0, 14), ADIS_ACCEL_CHAN(ROOT_SUM_SQUARED_X_Y, ADIS16204_XY_RSS_OUT, ADIS16204_SCAN_ACC_XY, BIT(IIO_CHAN_INFO_PEAK), 0, 14), IIO_CHAN_SOFT_TIMESTAMP(5), }; static const struct iio_info adis16204_info = { .read_raw = &adis16204_read_raw, .write_raw = &adis16204_write_raw, .update_scan_mode = adis_update_scan_mode, .driver_module = THIS_MODULE, }; static const char * const adis16204_status_error_msgs[] = { [ADIS16204_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure", [ADIS16204_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure", [ADIS16204_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed", [ADIS16204_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V", [ADIS16204_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V", }; static const struct adis_data adis16204_data = { .read_delay = 20, .msc_ctrl_reg = ADIS16204_MSC_CTRL, .glob_cmd_reg = ADIS16204_GLOB_CMD, .diag_stat_reg = ADIS16204_DIAG_STAT, .self_test_mask = ADIS16204_MSC_CTRL_SELF_TEST_EN, .startup_delay = ADIS16204_STARTUP_DELAY, .status_error_msgs = adis16204_status_error_msgs, .status_error_mask = BIT(ADIS16204_DIAG_STAT_SELFTEST_FAIL_BIT) | BIT(ADIS16204_DIAG_STAT_SPI_FAIL_BIT) | BIT(ADIS16204_DIAG_STAT_FLASH_UPT_BIT) | BIT(ADIS16204_DIAG_STAT_POWER_HIGH_BIT) | BIT(ADIS16204_DIAG_STAT_POWER_LOW_BIT), }; static int adis16204_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->dev.parent = &spi->dev; indio_dev->info = &adis16204_info; indio_dev->channels = adis16204_channels; indio_dev->num_channels = ARRAY_SIZE(adis16204_channels); indio_dev->modes = INDIO_DIRECT_MODE; ret = adis_init(st, indio_dev, spi, &adis16204_data); if (ret) return ret; ret = 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) goto error_cleanup_buffer_trigger; ret = iio_device_register(indio_dev); if (ret) goto error_cleanup_buffer_trigger; return 0; error_cleanup_buffer_trigger: adis_cleanup_buffer_and_trigger(st, indio_dev); return ret; } static int adis16204_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct adis *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); adis_cleanup_buffer_and_trigger(st, indio_dev); return 0; } static struct spi_driver adis16204_driver = { .driver = { .name = "adis16204", }, .probe = adis16204_probe, .remove = adis16204_remove, }; module_spi_driver(adis16204_driver); MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); MODULE_DESCRIPTION("ADIS16204 High-g Digital Impact Sensor and Recorder"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("spi:adis16204");