diff options
Diffstat (limited to 'drivers/iio/accel/bma180.c')
| -rw-r--r-- | drivers/iio/accel/bma180.c | 1147 |
1 files changed, 1147 insertions, 0 deletions
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c new file mode 100644 index 000000000..d03fc3400 --- /dev/null +++ b/drivers/iio/accel/bma180.c @@ -0,0 +1,1147 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor + * + * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com> + * + * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net> + * + * SPI is not supported by driver + * BMA023/BMA150/SMB380: 7-bit I2C slave address 0x38 + * BMA180: 7-bit I2C slave address 0x40 or 0x41 + * BMA250: 7-bit I2C slave address 0x18 or 0x19 + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/of_device.h> +#include <linux/of.h> +#include <linux/bitops.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#define BMA180_DRV_NAME "bma180" +#define BMA180_IRQ_NAME "bma180_event" + +enum chip_ids { + BMA023, + BMA150, + BMA180, + BMA250, +}; + +struct bma180_data; + +struct bma180_part_info { + u8 chip_id; + const struct iio_chan_spec *channels; + unsigned int num_channels; + const int *scale_table; + unsigned int num_scales; + const int *bw_table; + unsigned int num_bw; + int temp_offset; + + u8 int_reset_reg, int_reset_mask; + u8 sleep_reg, sleep_mask; + u8 bw_reg, bw_mask, bw_offset; + u8 scale_reg, scale_mask; + u8 power_reg, power_mask, lowpower_val; + u8 int_enable_reg, int_enable_mask; + u8 softreset_reg, softreset_val; + + int (*chip_config)(struct bma180_data *data); + void (*chip_disable)(struct bma180_data *data); +}; + +/* Register set */ +#define BMA023_CTRL_REG0 0x0a +#define BMA023_CTRL_REG1 0x0b +#define BMA023_CTRL_REG2 0x14 +#define BMA023_CTRL_REG3 0x15 + +#define BMA023_RANGE_MASK GENMASK(4, 3) /* Range of accel values */ +#define BMA023_BW_MASK GENMASK(2, 0) /* Accel bandwidth */ +#define BMA023_SLEEP BIT(0) +#define BMA023_INT_RESET_MASK BIT(6) +#define BMA023_NEW_DATA_INT BIT(5) /* Intr every new accel data is ready */ +#define BMA023_RESET_VAL BIT(1) + +#define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */ +#define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */ +#define BMA180_TEMP 0x08 +#define BMA180_CTRL_REG0 0x0d +#define BMA180_RESET 0x10 +#define BMA180_BW_TCS 0x20 +#define BMA180_CTRL_REG3 0x21 +#define BMA180_TCO_Z 0x30 +#define BMA180_OFFSET_LSB1 0x35 + +/* BMA180_CTRL_REG0 bits */ +#define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */ +#define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */ +#define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */ +#define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */ + +/* BMA180_CTRL_REG3 bits */ +#define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */ + +/* BMA180_OFFSET_LSB1 skipping mode bit */ +#define BMA180_SMP_SKIP BIT(0) + +/* Bit masks for registers bit fields */ +#define BMA180_RANGE 0x0e /* Range of measured accel values */ +#define BMA180_BW 0xf0 /* Accel bandwidth */ +#define BMA180_MODE_CONFIG 0x03 /* Config operation modes */ + +/* We have to write this value in reset register to do soft reset */ +#define BMA180_RESET_VAL 0xb6 + +#define BMA023_ID_REG_VAL 0x02 +#define BMA180_ID_REG_VAL 0x03 +#define BMA250_ID_REG_VAL 0x03 + +/* Chip power modes */ +#define BMA180_LOW_POWER 0x03 + +#define BMA250_RANGE_REG 0x0f +#define BMA250_BW_REG 0x10 +#define BMA250_POWER_REG 0x11 +#define BMA250_RESET_REG 0x14 +#define BMA250_INT_ENABLE_REG 0x17 +#define BMA250_INT_MAP_REG 0x1a +#define BMA250_INT_RESET_REG 0x21 + +#define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */ +#define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */ +#define BMA250_BW_OFFSET 8 +#define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */ +#define BMA250_LOWPOWER_MASK BIT(6) +#define BMA250_DATA_INTEN_MASK BIT(4) +#define BMA250_INT1_DATA_MASK BIT(0) +#define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */ + +struct bma180_data { + struct regulator *vdd_supply; + struct regulator *vddio_supply; + struct i2c_client *client; + struct iio_trigger *trig; + const struct bma180_part_info *part_info; + struct iio_mount_matrix orientation; + struct mutex mutex; + bool sleep_state; + int scale; + int bw; + bool pmode; + /* Ensure timestamp is naturally aligned */ + struct { + s16 chan[4]; + s64 timestamp __aligned(8); + } scan; +}; + +enum bma180_chan { + AXIS_X, + AXIS_Y, + AXIS_Z, + TEMP +}; + +static int bma023_bw_table[] = { 25, 50, 100, 190, 375, 750, 1500 }; /* Hz */ +static int bma023_scale_table[] = { 2452, 4903, 9709, }; + +static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */ +static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 }; + +static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250, 500, 1000 }; /* Hz */ +static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0, + 0, 0, 306458 }; + +static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan) +{ + int ret; + + if (data->sleep_state) + return -EBUSY; + + switch (chan) { + case TEMP: + ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP); + if (ret < 0) + dev_err(&data->client->dev, "failed to read temp register\n"); + break; + default: + ret = i2c_smbus_read_word_data(data->client, + BMA180_ACC_X_LSB + chan * 2); + if (ret < 0) + dev_err(&data->client->dev, + "failed to read accel_%c register\n", + 'x' + chan); + } + + return ret; +} + +static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val) +{ + int ret = i2c_smbus_read_byte_data(data->client, reg); + u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1)); + + if (ret < 0) + return ret; + + return i2c_smbus_write_byte_data(data->client, reg, reg_val); +} + +static int bma180_reset_intr(struct bma180_data *data) +{ + int ret = bma180_set_bits(data, data->part_info->int_reset_reg, + data->part_info->int_reset_mask, 1); + + if (ret) + dev_err(&data->client->dev, "failed to reset interrupt\n"); + + return ret; +} + +static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state) +{ + int ret = bma180_set_bits(data, data->part_info->int_enable_reg, + data->part_info->int_enable_mask, state); + if (ret) + goto err; + ret = bma180_reset_intr(data); + if (ret) + goto err; + + return 0; + +err: + dev_err(&data->client->dev, + "failed to set new data interrupt state %d\n", state); + return ret; +} + +static int bma180_set_sleep_state(struct bma180_data *data, bool state) +{ + int ret = bma180_set_bits(data, data->part_info->sleep_reg, + data->part_info->sleep_mask, state); + + if (ret) { + dev_err(&data->client->dev, + "failed to set sleep state %d\n", state); + return ret; + } + data->sleep_state = state; + + return 0; +} + +static int bma180_set_ee_writing_state(struct bma180_data *data, bool state) +{ + int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state); + + if (ret) + dev_err(&data->client->dev, + "failed to set ee writing state %d\n", state); + + return ret; +} + +static int bma180_set_bw(struct bma180_data *data, int val) +{ + int ret, i; + + if (data->sleep_state) + return -EBUSY; + + for (i = 0; i < data->part_info->num_bw; ++i) { + if (data->part_info->bw_table[i] == val) { + ret = bma180_set_bits(data, data->part_info->bw_reg, + data->part_info->bw_mask, + i + data->part_info->bw_offset); + if (ret) { + dev_err(&data->client->dev, + "failed to set bandwidth\n"); + return ret; + } + data->bw = val; + return 0; + } + } + + return -EINVAL; +} + +static int bma180_set_scale(struct bma180_data *data, int val) +{ + int ret, i; + + if (data->sleep_state) + return -EBUSY; + + for (i = 0; i < data->part_info->num_scales; ++i) + if (data->part_info->scale_table[i] == val) { + ret = bma180_set_bits(data, data->part_info->scale_reg, + data->part_info->scale_mask, i); + if (ret) { + dev_err(&data->client->dev, + "failed to set scale\n"); + return ret; + } + data->scale = val; + return 0; + } + + return -EINVAL; +} + +static int bma180_set_pmode(struct bma180_data *data, bool mode) +{ + u8 reg_val = mode ? data->part_info->lowpower_val : 0; + int ret = bma180_set_bits(data, data->part_info->power_reg, + data->part_info->power_mask, reg_val); + + if (ret) { + dev_err(&data->client->dev, "failed to set power mode\n"); + return ret; + } + data->pmode = mode; + + return 0; +} + +static int bma180_soft_reset(struct bma180_data *data) +{ + int ret = i2c_smbus_write_byte_data(data->client, + data->part_info->softreset_reg, + data->part_info->softreset_val); + + if (ret) + dev_err(&data->client->dev, "failed to reset the chip\n"); + + return ret; +} + +static int bma180_chip_init(struct bma180_data *data) +{ + /* Try to read chip_id register. It must return 0x03. */ + int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID); + + if (ret < 0) + return ret; + if (ret != data->part_info->chip_id) { + dev_err(&data->client->dev, "wrong chip ID %d expected %d\n", + ret, data->part_info->chip_id); + return -ENODEV; + } + + ret = bma180_soft_reset(data); + if (ret) + return ret; + /* + * No serial transaction should occur within minimum 10 us + * after soft_reset command + */ + msleep(20); + + return bma180_set_new_data_intr_state(data, false); +} + +static int bma023_chip_config(struct bma180_data *data) +{ + int ret = bma180_chip_init(data); + + if (ret) + goto err; + + ret = bma180_set_bw(data, 50); /* 50 Hz */ + if (ret) + goto err; + ret = bma180_set_scale(data, 2452); /* 2 G */ + if (ret) + goto err; + + return 0; + +err: + dev_err(&data->client->dev, "failed to config the chip\n"); + return ret; +} + +static int bma180_chip_config(struct bma180_data *data) +{ + int ret = bma180_chip_init(data); + + if (ret) + goto err; + ret = bma180_set_pmode(data, false); + if (ret) + goto err; + ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1); + if (ret) + goto err; + ret = bma180_set_ee_writing_state(data, true); + if (ret) + goto err; + ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1); + if (ret) + goto err; + ret = bma180_set_bw(data, 20); /* 20 Hz */ + if (ret) + goto err; + ret = bma180_set_scale(data, 2452); /* 2 G */ + if (ret) + goto err; + + return 0; + +err: + dev_err(&data->client->dev, "failed to config the chip\n"); + return ret; +} + +static int bma250_chip_config(struct bma180_data *data) +{ + int ret = bma180_chip_init(data); + + if (ret) + goto err; + ret = bma180_set_pmode(data, false); + if (ret) + goto err; + ret = bma180_set_bw(data, 16); /* 16 Hz */ + if (ret) + goto err; + ret = bma180_set_scale(data, 38344); /* 2 G */ + if (ret) + goto err; + /* + * This enables dataready interrupt on the INT1 pin + * FIXME: support using the INT2 pin + */ + ret = bma180_set_bits(data, BMA250_INT_MAP_REG, BMA250_INT1_DATA_MASK, 1); + if (ret) + goto err; + + return 0; + +err: + dev_err(&data->client->dev, "failed to config the chip\n"); + return ret; +} + +static void bma023_chip_disable(struct bma180_data *data) +{ + if (bma180_set_sleep_state(data, true)) + goto err; + + return; + +err: + dev_err(&data->client->dev, "failed to disable the chip\n"); +} + +static void bma180_chip_disable(struct bma180_data *data) +{ + if (bma180_set_new_data_intr_state(data, false)) + goto err; + if (bma180_set_ee_writing_state(data, false)) + goto err; + if (bma180_set_sleep_state(data, true)) + goto err; + + return; + +err: + dev_err(&data->client->dev, "failed to disable the chip\n"); +} + +static void bma250_chip_disable(struct bma180_data *data) +{ + if (bma180_set_new_data_intr_state(data, false)) + goto err; + if (bma180_set_sleep_state(data, true)) + goto err; + + return; + +err: + dev_err(&data->client->dev, "failed to disable the chip\n"); +} + +static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n, + bool micros) +{ + size_t len = 0; + int i; + + for (i = 0; i < n; i++) { + if (!vals[i]) + continue; + len += scnprintf(buf + len, PAGE_SIZE - len, + micros ? "0.%06d " : "%d ", vals[i]); + } + buf[len - 1] = '\n'; + + return len; +} + +static ssize_t bma180_show_filter_freq_avail(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bma180_data *data = iio_priv(dev_to_iio_dev(dev)); + + return bma180_show_avail(buf, data->part_info->bw_table, + data->part_info->num_bw, false); +} + +static ssize_t bma180_show_scale_avail(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bma180_data *data = iio_priv(dev_to_iio_dev(dev)); + + return bma180_show_avail(buf, data->part_info->scale_table, + data->part_info->num_scales, true); +} + +static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available, + S_IRUGO, bma180_show_filter_freq_avail, NULL, 0); + +static IIO_DEVICE_ATTR(in_accel_scale_available, + S_IRUGO, bma180_show_scale_avail, NULL, 0); + +static struct attribute *bma180_attributes[] = { + &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available. + dev_attr.attr, + &iio_dev_attr_in_accel_scale_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group bma180_attrs_group = { + .attrs = bma180_attributes, +}; + +static int bma180_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, + long mask) +{ + struct bma180_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + + mutex_lock(&data->mutex); + ret = bma180_get_data_reg(data, chan->scan_index); + mutex_unlock(&data->mutex); + iio_device_release_direct_mode(indio_dev); + if (ret < 0) + return ret; + if (chan->scan_type.sign == 's') { + *val = sign_extend32(ret >> chan->scan_type.shift, + chan->scan_type.realbits - 1); + } else { + *val = ret; + } + return IIO_VAL_INT; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + *val = data->bw; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ACCEL: + *val = 0; + *val2 = data->scale; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + *val = 500; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + *val = data->part_info->temp_offset; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int bma180_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, long mask) +{ + struct bma180_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + if (val) + return -EINVAL; + mutex_lock(&data->mutex); + ret = bma180_set_scale(data, val2); + mutex_unlock(&data->mutex); + return ret; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + if (val2) + return -EINVAL; + mutex_lock(&data->mutex); + ret = bma180_set_bw(data, val); + mutex_unlock(&data->mutex); + return ret; + default: + return -EINVAL; + } +} + +static const struct iio_info bma180_info = { + .attrs = &bma180_attrs_group, + .read_raw = bma180_read_raw, + .write_raw = bma180_write_raw, +}; + +static const char * const bma180_power_modes[] = { "low_noise", "low_power" }; + +static int bma180_get_power_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct bma180_data *data = iio_priv(indio_dev); + + return data->pmode; +} + +static int bma180_set_power_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, unsigned int mode) +{ + struct bma180_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = bma180_set_pmode(data, mode); + mutex_unlock(&data->mutex); + + return ret; +} + +static const struct iio_mount_matrix * +bma180_accel_get_mount_matrix(const struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct bma180_data *data = iio_priv(indio_dev); + + return &data->orientation; +} + +static const struct iio_enum bma180_power_mode_enum = { + .items = bma180_power_modes, + .num_items = ARRAY_SIZE(bma180_power_modes), + .get = bma180_get_power_mode, + .set = bma180_set_power_mode, +}; + +static const struct iio_chan_spec_ext_info bma023_ext_info[] = { + IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix), + { } +}; + +static const struct iio_chan_spec_ext_info bma180_ext_info[] = { + IIO_ENUM("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum), + IIO_ENUM_AVAILABLE("power_mode", IIO_SHARED_BY_TYPE, &bma180_power_mode_enum), + IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix), + { } +}; + +#define BMA023_ACC_CHANNEL(_axis, _bits) { \ + .type = IIO_ACCEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_##_axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ + .scan_index = AXIS_##_axis, \ + .scan_type = { \ + .sign = 's', \ + .realbits = _bits, \ + .storagebits = 16, \ + .shift = 16 - _bits, \ + }, \ + .ext_info = bma023_ext_info, \ +} + +#define BMA150_TEMP_CHANNEL { \ + .type = IIO_TEMP, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \ + .scan_index = TEMP, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 8, \ + .storagebits = 16, \ + }, \ +} + +#define BMA180_ACC_CHANNEL(_axis, _bits) { \ + .type = IIO_ACCEL, \ + .modified = 1, \ + .channel2 = IIO_MOD_##_axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ + .scan_index = AXIS_##_axis, \ + .scan_type = { \ + .sign = 's', \ + .realbits = _bits, \ + .storagebits = 16, \ + .shift = 16 - _bits, \ + }, \ + .ext_info = bma180_ext_info, \ +} + +#define BMA180_TEMP_CHANNEL { \ + .type = IIO_TEMP, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \ + .scan_index = TEMP, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 8, \ + .storagebits = 16, \ + }, \ +} + +static const struct iio_chan_spec bma023_channels[] = { + BMA023_ACC_CHANNEL(X, 10), + BMA023_ACC_CHANNEL(Y, 10), + BMA023_ACC_CHANNEL(Z, 10), + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static const struct iio_chan_spec bma150_channels[] = { + BMA023_ACC_CHANNEL(X, 10), + BMA023_ACC_CHANNEL(Y, 10), + BMA023_ACC_CHANNEL(Z, 10), + BMA150_TEMP_CHANNEL, + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static const struct iio_chan_spec bma180_channels[] = { + BMA180_ACC_CHANNEL(X, 14), + BMA180_ACC_CHANNEL(Y, 14), + BMA180_ACC_CHANNEL(Z, 14), + BMA180_TEMP_CHANNEL, + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static const struct iio_chan_spec bma250_channels[] = { + BMA180_ACC_CHANNEL(X, 10), + BMA180_ACC_CHANNEL(Y, 10), + BMA180_ACC_CHANNEL(Z, 10), + BMA180_TEMP_CHANNEL, + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static const struct bma180_part_info bma180_part_info[] = { + [BMA023] = { + .chip_id = BMA023_ID_REG_VAL, + .channels = bma023_channels, + .num_channels = ARRAY_SIZE(bma023_channels), + .scale_table = bma023_scale_table, + .num_scales = ARRAY_SIZE(bma023_scale_table), + .bw_table = bma023_bw_table, + .num_bw = ARRAY_SIZE(bma023_bw_table), + /* No temperature channel */ + .temp_offset = 0, + .int_reset_reg = BMA023_CTRL_REG0, + .int_reset_mask = BMA023_INT_RESET_MASK, + .sleep_reg = BMA023_CTRL_REG0, + .sleep_mask = BMA023_SLEEP, + .bw_reg = BMA023_CTRL_REG2, + .bw_mask = BMA023_BW_MASK, + .scale_reg = BMA023_CTRL_REG2, + .scale_mask = BMA023_RANGE_MASK, + /* No power mode on bma023 */ + .power_reg = 0, + .power_mask = 0, + .lowpower_val = 0, + .int_enable_reg = BMA023_CTRL_REG3, + .int_enable_mask = BMA023_NEW_DATA_INT, + .softreset_reg = BMA023_CTRL_REG0, + .softreset_val = BMA023_RESET_VAL, + .chip_config = bma023_chip_config, + .chip_disable = bma023_chip_disable, + }, + [BMA150] = { + .chip_id = BMA023_ID_REG_VAL, + .channels = bma150_channels, + .num_channels = ARRAY_SIZE(bma150_channels), + .scale_table = bma023_scale_table, + .num_scales = ARRAY_SIZE(bma023_scale_table), + .bw_table = bma023_bw_table, + .num_bw = ARRAY_SIZE(bma023_bw_table), + .temp_offset = -60, /* 0 LSB @ -30 degree C */ + .int_reset_reg = BMA023_CTRL_REG0, + .int_reset_mask = BMA023_INT_RESET_MASK, + .sleep_reg = BMA023_CTRL_REG0, + .sleep_mask = BMA023_SLEEP, + .bw_reg = BMA023_CTRL_REG2, + .bw_mask = BMA023_BW_MASK, + .scale_reg = BMA023_CTRL_REG2, + .scale_mask = BMA023_RANGE_MASK, + /* No power mode on bma150 */ + .power_reg = 0, + .power_mask = 0, + .lowpower_val = 0, + .int_enable_reg = BMA023_CTRL_REG3, + .int_enable_mask = BMA023_NEW_DATA_INT, + .softreset_reg = BMA023_CTRL_REG0, + .softreset_val = BMA023_RESET_VAL, + .chip_config = bma023_chip_config, + .chip_disable = bma023_chip_disable, + }, + [BMA180] = { + .chip_id = BMA180_ID_REG_VAL, + .channels = bma180_channels, + .num_channels = ARRAY_SIZE(bma180_channels), + .scale_table = bma180_scale_table, + .num_scales = ARRAY_SIZE(bma180_scale_table), + .bw_table = bma180_bw_table, + .num_bw = ARRAY_SIZE(bma180_bw_table), + .temp_offset = 48, /* 0 LSB @ 24 degree C */ + .int_reset_reg = BMA180_CTRL_REG0, + .int_reset_mask = BMA180_RESET_INT, + .sleep_reg = BMA180_CTRL_REG0, + .sleep_mask = BMA180_SLEEP, + .bw_reg = BMA180_BW_TCS, + .bw_mask = BMA180_BW, + .scale_reg = BMA180_OFFSET_LSB1, + .scale_mask = BMA180_RANGE, + .power_reg = BMA180_TCO_Z, + .power_mask = BMA180_MODE_CONFIG, + .lowpower_val = BMA180_LOW_POWER, + .int_enable_reg = BMA180_CTRL_REG3, + .int_enable_mask = BMA180_NEW_DATA_INT, + .softreset_reg = BMA180_RESET, + .softreset_val = BMA180_RESET_VAL, + .chip_config = bma180_chip_config, + .chip_disable = bma180_chip_disable, + }, + [BMA250] = { + .chip_id = BMA250_ID_REG_VAL, + .channels = bma250_channels, + .num_channels = ARRAY_SIZE(bma250_channels), + .scale_table = bma250_scale_table, + .num_scales = ARRAY_SIZE(bma250_scale_table), + .bw_table = bma250_bw_table, + .num_bw = ARRAY_SIZE(bma250_bw_table), + .temp_offset = 48, /* 0 LSB @ 24 degree C */ + .int_reset_reg = BMA250_INT_RESET_REG, + .int_reset_mask = BMA250_INT_RESET_MASK, + .sleep_reg = BMA250_POWER_REG, + .sleep_mask = BMA250_SUSPEND_MASK, + .bw_reg = BMA250_BW_REG, + .bw_mask = BMA250_BW_MASK, + .bw_offset = BMA250_BW_OFFSET, + .scale_reg = BMA250_RANGE_REG, + .scale_mask = BMA250_RANGE_MASK, + .power_reg = BMA250_POWER_REG, + .power_mask = BMA250_LOWPOWER_MASK, + .lowpower_val = 1, + .int_enable_reg = BMA250_INT_ENABLE_REG, + .int_enable_mask = BMA250_DATA_INTEN_MASK, + .softreset_reg = BMA250_RESET_REG, + .softreset_val = BMA180_RESET_VAL, + .chip_config = bma250_chip_config, + .chip_disable = bma250_chip_disable, + }, +}; + +static irqreturn_t bma180_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bma180_data *data = iio_priv(indio_dev); + s64 time_ns = iio_get_time_ns(indio_dev); + int bit, ret, i = 0; + + mutex_lock(&data->mutex); + + for_each_set_bit(bit, indio_dev->active_scan_mask, + indio_dev->masklength) { + ret = bma180_get_data_reg(data, bit); + if (ret < 0) { + mutex_unlock(&data->mutex); + goto err; + } + data->scan.chan[i++] = ret; + } + + mutex_unlock(&data->mutex); + + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns); +err: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct bma180_data *data = iio_priv(indio_dev); + + return bma180_set_new_data_intr_state(data, state); +} + +static void bma180_trig_reen(struct iio_trigger *trig) +{ + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct bma180_data *data = iio_priv(indio_dev); + int ret; + + ret = bma180_reset_intr(data); + if (ret) + dev_err(&data->client->dev, "failed to reset interrupt\n"); +} + +static const struct iio_trigger_ops bma180_trigger_ops = { + .set_trigger_state = bma180_data_rdy_trigger_set_state, + .reenable = bma180_trig_reen, +}; + +static int bma180_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct bma180_data *data; + struct iio_dev *indio_dev; + enum chip_ids chip; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + if (client->dev.of_node) + chip = (uintptr_t)of_device_get_match_data(dev); + else + chip = id->driver_data; + data->part_info = &bma180_part_info[chip]; + + ret = iio_read_mount_matrix(dev, &data->orientation); + if (ret) + return ret; + + data->vdd_supply = devm_regulator_get(dev, "vdd"); + if (IS_ERR(data->vdd_supply)) + return dev_err_probe(dev, PTR_ERR(data->vdd_supply), + "Failed to get vdd regulator\n"); + + data->vddio_supply = devm_regulator_get(dev, "vddio"); + if (IS_ERR(data->vddio_supply)) + return dev_err_probe(dev, PTR_ERR(data->vddio_supply), + "Failed to get vddio regulator\n"); + + /* Typical voltage 2.4V these are min and max */ + ret = regulator_set_voltage(data->vdd_supply, 1620000, 3600000); + if (ret) + return ret; + ret = regulator_set_voltage(data->vddio_supply, 1200000, 3600000); + if (ret) + return ret; + ret = regulator_enable(data->vdd_supply); + if (ret) { + dev_err(dev, "Failed to enable vdd regulator: %d\n", ret); + return ret; + } + ret = regulator_enable(data->vddio_supply); + if (ret) { + dev_err(dev, "Failed to enable vddio regulator: %d\n", ret); + goto err_disable_vdd; + } + /* Wait to make sure we started up properly (3 ms at least) */ + usleep_range(3000, 5000); + + ret = data->part_info->chip_config(data); + if (ret < 0) + goto err_chip_disable; + + mutex_init(&data->mutex); + indio_dev->channels = data->part_info->channels; + indio_dev->num_channels = data->part_info->num_channels; + indio_dev->name = id->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &bma180_info; + + if (client->irq > 0) { + data->trig = iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, + iio_device_id(indio_dev)); + if (!data->trig) { + ret = -ENOMEM; + goto err_chip_disable; + } + + ret = devm_request_irq(dev, client->irq, + iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING, + "bma180_event", data->trig); + if (ret) { + dev_err(dev, "unable to request IRQ\n"); + goto err_trigger_free; + } + + data->trig->ops = &bma180_trigger_ops; + iio_trigger_set_drvdata(data->trig, indio_dev); + + ret = iio_trigger_register(data->trig); + if (ret) + goto err_trigger_free; + + indio_dev->trig = iio_trigger_get(data->trig); + } + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + bma180_trigger_handler, NULL); + if (ret < 0) { + dev_err(dev, "unable to setup iio triggered buffer\n"); + goto err_trigger_unregister; + } + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(dev, "unable to register iio device\n"); + goto err_buffer_cleanup; + } + + return 0; + +err_buffer_cleanup: + iio_triggered_buffer_cleanup(indio_dev); +err_trigger_unregister: + if (data->trig) + iio_trigger_unregister(data->trig); +err_trigger_free: + iio_trigger_free(data->trig); +err_chip_disable: + data->part_info->chip_disable(data); + regulator_disable(data->vddio_supply); +err_disable_vdd: + regulator_disable(data->vdd_supply); + + return ret; +} + +static void bma180_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct bma180_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + if (data->trig) { + iio_trigger_unregister(data->trig); + iio_trigger_free(data->trig); + } + + mutex_lock(&data->mutex); + data->part_info->chip_disable(data); + mutex_unlock(&data->mutex); + regulator_disable(data->vddio_supply); + regulator_disable(data->vdd_supply); +} + +static int bma180_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct bma180_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = bma180_set_sleep_state(data, true); + mutex_unlock(&data->mutex); + + return ret; +} + +static int bma180_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct bma180_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->mutex); + ret = bma180_set_sleep_state(data, false); + mutex_unlock(&data->mutex); + + return ret; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume); + +static const struct i2c_device_id bma180_ids[] = { + { "bma023", BMA023 }, + { "bma150", BMA150 }, + { "bma180", BMA180 }, + { "bma250", BMA250 }, + { "smb380", BMA150 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, bma180_ids); + +static const struct of_device_id bma180_of_match[] = { + { + .compatible = "bosch,bma023", + .data = (void *)BMA023 + }, + { + .compatible = "bosch,bma150", + .data = (void *)BMA150 + }, + { + .compatible = "bosch,bma180", + .data = (void *)BMA180 + }, + { + .compatible = "bosch,bma250", + .data = (void *)BMA250 + }, + { + .compatible = "bosch,smb380", + .data = (void *)BMA150 + }, + { } +}; +MODULE_DEVICE_TABLE(of, bma180_of_match); + +static struct i2c_driver bma180_driver = { + .driver = { + .name = "bma180", + .pm = pm_sleep_ptr(&bma180_pm_ops), + .of_match_table = bma180_of_match, + }, + .probe = bma180_probe, + .remove = bma180_remove, + .id_table = bma180_ids, +}; + +module_i2c_driver(bma180_driver); + +MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>"); +MODULE_AUTHOR("Texas Instruments, Inc."); +MODULE_DESCRIPTION("Bosch BMA023/BMA1x0/BMA250 triaxial acceleration sensor"); +MODULE_LICENSE("GPL"); |