![Linus Walleij](/assets/img/avatar_default.png)
This adds support for the BMA254 variant of this accelerometer. The only difference for the simple IIO driver is that values are 12 bit and the temperature offset differs by 1 degree. Whilst wildcards in naming are normally frowned upon: The cases where I have labeled variables "25x" is where the models are identical, so as to make things easier for people that want to add support for BMA253 and BMA255. Cc: Peter Meerwald <pmeerw@pmeerw.net> Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com> Cc: devicetree@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
1035 lines
26 KiB
C
1035 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
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*
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* Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
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*
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* Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
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*
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* SPI is not supported by driver
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* BMA180: 7-bit I2C slave address 0x40 or 0x41
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* BMA250: 7-bit I2C slave address 0x18 or 0x19
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* BMA254: 7-bit I2C slave address 0x18 or 0x19
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <linux/bitops.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#define BMA180_DRV_NAME "bma180"
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#define BMA180_IRQ_NAME "bma180_event"
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enum chip_ids {
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BMA180,
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BMA250,
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BMA254,
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};
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struct bma180_data;
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struct bma180_part_info {
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u8 chip_id;
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const struct iio_chan_spec *channels;
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unsigned int num_channels;
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const int *scale_table;
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unsigned int num_scales;
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const int *bw_table;
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unsigned int num_bw;
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int center_temp;
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u8 int_reset_reg, int_reset_mask;
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u8 sleep_reg, sleep_mask;
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u8 bw_reg, bw_mask;
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u8 scale_reg, scale_mask;
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u8 power_reg, power_mask, lowpower_val;
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u8 int_enable_reg, int_enable_mask;
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u8 int_map_reg, int_enable_dataready_int1_mask;
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u8 softreset_reg;
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int (*chip_config)(struct bma180_data *data);
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void (*chip_disable)(struct bma180_data *data);
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};
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/* Register set */
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#define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */
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#define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */
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#define BMA180_TEMP 0x08
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#define BMA180_CTRL_REG0 0x0d
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#define BMA180_RESET 0x10
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#define BMA180_BW_TCS 0x20
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#define BMA180_CTRL_REG3 0x21
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#define BMA180_TCO_Z 0x30
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#define BMA180_OFFSET_LSB1 0x35
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/* BMA180_CTRL_REG0 bits */
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#define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */
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#define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */
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#define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */
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#define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */
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/* BMA180_CTRL_REG3 bits */
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#define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */
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/* BMA180_OFFSET_LSB1 skipping mode bit */
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#define BMA180_SMP_SKIP BIT(0)
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/* Bit masks for registers bit fields */
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#define BMA180_RANGE 0x0e /* Range of measured accel values */
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#define BMA180_BW 0xf0 /* Accel bandwidth */
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#define BMA180_MODE_CONFIG 0x03 /* Config operation modes */
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/* We have to write this value in reset register to do soft reset */
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#define BMA180_RESET_VAL 0xb6
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#define BMA180_ID_REG_VAL 0x03
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#define BMA250_ID_REG_VAL 0x03
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#define BMA254_ID_REG_VAL 0xfa /* 250 decimal */
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/* Chip power modes */
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#define BMA180_LOW_POWER 0x03
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#define BMA250_RANGE_REG 0x0f
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#define BMA250_BW_REG 0x10
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#define BMA250_POWER_REG 0x11
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#define BMA250_RESET_REG 0x14
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#define BMA250_INT_ENABLE_REG 0x17
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#define BMA250_INT_MAP_REG 0x1a
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#define BMA250_INT_RESET_REG 0x21
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#define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
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#define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
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#define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */
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#define BMA250_LOWPOWER_MASK BIT(6)
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#define BMA250_DATA_INTEN_MASK BIT(4)
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#define BMA250_INT1_DATA_MASK BIT(0)
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#define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
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#define BMA254_RANGE_REG 0x0f
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#define BMA254_BW_REG 0x10
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#define BMA254_POWER_REG 0x11
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#define BMA254_RESET_REG 0x14
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#define BMA254_INT_ENABLE_REG 0x17
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#define BMA254_INT_MAP_REG 0x1a
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#define BMA254_INT_RESET_REG 0x21
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#define BMA254_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
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#define BMA254_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
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#define BMA254_SUSPEND_MASK BIT(7) /* chip will sleep */
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#define BMA254_LOWPOWER_MASK BIT(6)
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#define BMA254_DATA_INTEN_MASK BIT(4)
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#define BMA254_INT2_DATA_MASK BIT(7)
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#define BMA254_INT1_DATA_MASK BIT(0)
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#define BMA254_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
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struct bma180_data {
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struct regulator *vdd_supply;
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struct regulator *vddio_supply;
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struct i2c_client *client;
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struct iio_trigger *trig;
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const struct bma180_part_info *part_info;
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struct iio_mount_matrix orientation;
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struct mutex mutex;
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bool sleep_state;
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int scale;
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int bw;
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bool pmode;
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u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
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};
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enum bma180_chan {
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AXIS_X,
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AXIS_Y,
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AXIS_Z,
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TEMP
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};
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static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
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static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
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static int bma25x_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
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static int bma25x_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
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0, 0, 306458 };
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static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
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{
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int ret;
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if (data->sleep_state)
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return -EBUSY;
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switch (chan) {
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case TEMP:
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ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
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if (ret < 0)
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dev_err(&data->client->dev, "failed to read temp register\n");
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break;
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default:
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ret = i2c_smbus_read_word_data(data->client,
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BMA180_ACC_X_LSB + chan * 2);
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if (ret < 0)
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dev_err(&data->client->dev,
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"failed to read accel_%c register\n",
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'x' + chan);
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}
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return ret;
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}
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static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
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{
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int ret = i2c_smbus_read_byte_data(data->client, reg);
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u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
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if (ret < 0)
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return ret;
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return i2c_smbus_write_byte_data(data->client, reg, reg_val);
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}
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static int bma180_reset_intr(struct bma180_data *data)
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{
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int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
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data->part_info->int_reset_mask, 1);
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if (ret)
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dev_err(&data->client->dev, "failed to reset interrupt\n");
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return ret;
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}
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static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
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{
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int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
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data->part_info->int_enable_mask, state);
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if (ret)
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goto err;
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ret = bma180_reset_intr(data);
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if (ret)
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goto err;
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return 0;
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err:
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dev_err(&data->client->dev,
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"failed to set new data interrupt state %d\n", state);
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return ret;
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}
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static int bma180_set_sleep_state(struct bma180_data *data, bool state)
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{
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int ret = bma180_set_bits(data, data->part_info->sleep_reg,
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data->part_info->sleep_mask, state);
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if (ret) {
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dev_err(&data->client->dev,
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"failed to set sleep state %d\n", state);
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return ret;
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}
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data->sleep_state = state;
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return 0;
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}
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static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
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{
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int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
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if (ret)
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dev_err(&data->client->dev,
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"failed to set ee writing state %d\n", state);
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return ret;
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}
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static int bma180_set_bw(struct bma180_data *data, int val)
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{
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int ret, i;
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if (data->sleep_state)
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return -EBUSY;
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for (i = 0; i < data->part_info->num_bw; ++i) {
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if (data->part_info->bw_table[i] == val) {
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ret = bma180_set_bits(data, data->part_info->bw_reg,
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data->part_info->bw_mask, i);
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if (ret) {
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dev_err(&data->client->dev,
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"failed to set bandwidth\n");
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return ret;
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}
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data->bw = val;
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return 0;
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}
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}
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return -EINVAL;
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}
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static int bma180_set_scale(struct bma180_data *data, int val)
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{
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int ret, i;
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if (data->sleep_state)
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return -EBUSY;
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for (i = 0; i < data->part_info->num_scales; ++i)
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if (data->part_info->scale_table[i] == val) {
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ret = bma180_set_bits(data, data->part_info->scale_reg,
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data->part_info->scale_mask, i);
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if (ret) {
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dev_err(&data->client->dev,
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"failed to set scale\n");
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return ret;
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}
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data->scale = val;
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return 0;
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}
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return -EINVAL;
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}
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static int bma180_set_pmode(struct bma180_data *data, bool mode)
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{
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u8 reg_val = mode ? data->part_info->lowpower_val : 0;
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int ret = bma180_set_bits(data, data->part_info->power_reg,
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data->part_info->power_mask, reg_val);
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if (ret) {
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dev_err(&data->client->dev, "failed to set power mode\n");
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return ret;
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}
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data->pmode = mode;
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return 0;
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}
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static int bma180_soft_reset(struct bma180_data *data)
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{
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int ret = i2c_smbus_write_byte_data(data->client,
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data->part_info->softreset_reg, BMA180_RESET_VAL);
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if (ret)
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dev_err(&data->client->dev, "failed to reset the chip\n");
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return ret;
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}
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static int bma180_chip_init(struct bma180_data *data)
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{
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/* Try to read chip_id register. It must return 0x03. */
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int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
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if (ret < 0)
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return ret;
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if (ret != data->part_info->chip_id) {
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dev_err(&data->client->dev, "wrong chip ID %d expected %d\n",
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ret, data->part_info->chip_id);
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return -ENODEV;
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}
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ret = bma180_soft_reset(data);
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if (ret)
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return ret;
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/*
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* No serial transaction should occur within minimum 10 us
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* after soft_reset command
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*/
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msleep(20);
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ret = bma180_set_new_data_intr_state(data, false);
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if (ret)
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return ret;
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return bma180_set_pmode(data, false);
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}
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static int bma180_chip_config(struct bma180_data *data)
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{
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int ret = bma180_chip_init(data);
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if (ret)
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goto err;
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ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
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if (ret)
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goto err;
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ret = bma180_set_ee_writing_state(data, true);
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if (ret)
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goto err;
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ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
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if (ret)
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goto err;
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ret = bma180_set_bw(data, 20); /* 20 Hz */
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if (ret)
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goto err;
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ret = bma180_set_scale(data, 2452); /* 2 G */
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if (ret)
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goto err;
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return 0;
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err:
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dev_err(&data->client->dev, "failed to config the chip\n");
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return ret;
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}
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static int bma25x_chip_config(struct bma180_data *data)
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{
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int ret = bma180_chip_init(data);
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if (ret)
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goto err;
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ret = bma180_set_bw(data, 16); /* 16 Hz */
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if (ret)
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goto err;
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ret = bma180_set_scale(data, 38344); /* 2 G */
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if (ret)
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goto err;
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/*
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* This enables dataready interrupt on the INT1 pin
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* FIXME: support using the INT2 pin
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*/
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ret = bma180_set_bits(data, data->part_info->int_map_reg,
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data->part_info->int_enable_dataready_int1_mask, 1);
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if (ret)
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goto err;
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return 0;
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err:
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dev_err(&data->client->dev, "failed to config the chip\n");
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return ret;
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}
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static void bma180_chip_disable(struct bma180_data *data)
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{
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if (bma180_set_new_data_intr_state(data, false))
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goto err;
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if (bma180_set_ee_writing_state(data, false))
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goto err;
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if (bma180_set_sleep_state(data, true))
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goto err;
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return;
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err:
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dev_err(&data->client->dev, "failed to disable the chip\n");
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}
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static void bma25x_chip_disable(struct bma180_data *data)
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{
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if (bma180_set_new_data_intr_state(data, false))
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goto err;
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if (bma180_set_sleep_state(data, true))
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goto err;
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return;
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err:
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dev_err(&data->client->dev, "failed to disable the chip\n");
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}
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static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
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bool micros)
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{
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size_t len = 0;
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int i;
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for (i = 0; i < n; i++) {
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if (!vals[i])
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continue;
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len += scnprintf(buf + len, PAGE_SIZE - len,
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micros ? "0.%06d " : "%d ", vals[i]);
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}
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buf[len - 1] = '\n';
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return len;
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}
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static ssize_t bma180_show_filter_freq_avail(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
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return bma180_show_avail(buf, data->part_info->bw_table,
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data->part_info->num_bw, false);
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}
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static ssize_t bma180_show_scale_avail(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
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return bma180_show_avail(buf, data->part_info->scale_table,
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data->part_info->num_scales, true);
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}
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static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
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S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
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static IIO_DEVICE_ATTR(in_accel_scale_available,
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S_IRUGO, bma180_show_scale_avail, NULL, 0);
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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;
|
|
*val = sign_extend32(ret >> chan->scan_type.shift,
|
|
chan->scan_type.realbits - 1);
|
|
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->center_temp;
|
|
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 bma180_ext_info[] = {
|
|
IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
|
|
IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
|
|
IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, bma180_accel_get_mount_matrix),
|
|
{ }
|
|
};
|
|
|
|
#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 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 iio_chan_spec bma254_channels[] = {
|
|
BMA180_ACC_CHANNEL(X, 12),
|
|
BMA180_ACC_CHANNEL(Y, 12),
|
|
BMA180_ACC_CHANNEL(Z, 12),
|
|
BMA180_TEMP_CHANNEL,
|
|
IIO_CHAN_SOFT_TIMESTAMP(4),
|
|
};
|
|
|
|
static const struct bma180_part_info bma180_part_info[] = {
|
|
[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),
|
|
.center_temp = 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,
|
|
.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 = bma25x_scale_table,
|
|
.num_scales = ARRAY_SIZE(bma25x_scale_table),
|
|
.bw_table = bma25x_bw_table,
|
|
.num_bw = ARRAY_SIZE(bma25x_bw_table),
|
|
.center_temp = 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,
|
|
.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,
|
|
.int_map_reg = BMA250_INT_MAP_REG,
|
|
.int_enable_dataready_int1_mask = BMA250_INT1_DATA_MASK,
|
|
.softreset_reg = BMA250_RESET_REG,
|
|
.chip_config = bma25x_chip_config,
|
|
.chip_disable = bma25x_chip_disable,
|
|
},
|
|
[BMA254] = {
|
|
.chip_id = BMA254_ID_REG_VAL,
|
|
.channels = bma254_channels,
|
|
.num_channels = ARRAY_SIZE(bma254_channels),
|
|
.scale_table = bma25x_scale_table,
|
|
.num_scales = ARRAY_SIZE(bma25x_scale_table),
|
|
.bw_table = bma25x_bw_table,
|
|
.num_bw = ARRAY_SIZE(bma25x_bw_table),
|
|
.center_temp = 46, /* 0 LSB @ 23 degree C */
|
|
.int_reset_reg = BMA254_INT_RESET_REG,
|
|
.int_reset_mask = BMA254_INT_RESET_MASK,
|
|
.sleep_reg = BMA254_POWER_REG,
|
|
.sleep_mask = BMA254_SUSPEND_MASK,
|
|
.bw_reg = BMA254_BW_REG,
|
|
.bw_mask = BMA254_BW_MASK,
|
|
.scale_reg = BMA254_RANGE_REG,
|
|
.scale_mask = BMA254_RANGE_MASK,
|
|
.power_reg = BMA254_POWER_REG,
|
|
.power_mask = BMA254_LOWPOWER_MASK,
|
|
.lowpower_val = 1,
|
|
.int_enable_reg = BMA254_INT_ENABLE_REG,
|
|
.int_enable_mask = BMA254_DATA_INTEN_MASK,
|
|
.int_map_reg = BMA254_INT_MAP_REG,
|
|
.int_enable_dataready_int1_mask = BMA254_INT1_DATA_MASK,
|
|
.softreset_reg = BMA254_RESET_REG,
|
|
.chip_config = bma25x_chip_config,
|
|
.chip_disable = bma25x_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;
|
|
}
|
|
((s16 *)data->buff)[i++] = ret;
|
|
}
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, data->buff, 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 int bma180_trig_try_reen(struct iio_trigger *trig)
|
|
{
|
|
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
|
|
struct bma180_data *data = iio_priv(indio_dev);
|
|
|
|
return bma180_reset_intr(data);
|
|
}
|
|
|
|
static const struct iio_trigger_ops bma180_trigger_ops = {
|
|
.set_trigger_state = bma180_data_rdy_trigger_set_state,
|
|
.try_reenable = bma180_trig_try_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 = (enum chip_ids)of_device_get_match_data(dev);
|
|
else
|
|
chip = id->driver_data;
|
|
data->part_info = &bma180_part_info[chip];
|
|
|
|
ret = iio_read_mount_matrix(dev, "mount-matrix",
|
|
&data->orientation);
|
|
if (ret)
|
|
return ret;
|
|
|
|
data->vdd_supply = devm_regulator_get(dev, "vdd");
|
|
if (IS_ERR(data->vdd_supply)) {
|
|
if (PTR_ERR(data->vdd_supply) != -EPROBE_DEFER)
|
|
dev_err(dev, "Failed to get vdd regulator %d\n",
|
|
(int)PTR_ERR(data->vdd_supply));
|
|
return PTR_ERR(data->vdd_supply);
|
|
}
|
|
data->vddio_supply = devm_regulator_get(dev, "vddio");
|
|
if (IS_ERR(data->vddio_supply)) {
|
|
if (PTR_ERR(data->vddio_supply) != -EPROBE_DEFER)
|
|
dev_err(dev, "Failed to get vddio regulator %d\n",
|
|
(int)PTR_ERR(data->vddio_supply));
|
|
return PTR_ERR(data->vddio_supply);
|
|
}
|
|
/* 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->dev.parent = dev;
|
|
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("%s-dev%d", indio_dev->name,
|
|
indio_dev->id);
|
|
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->dev.parent = dev;
|
|
data->trig->ops = &bma180_trigger_ops;
|
|
iio_trigger_set_drvdata(data->trig, indio_dev);
|
|
indio_dev->trig = iio_trigger_get(data->trig);
|
|
|
|
ret = iio_trigger_register(data->trig);
|
|
if (ret)
|
|
goto err_trigger_free;
|
|
}
|
|
|
|
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 int 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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
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 SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
|
|
#define BMA180_PM_OPS (&bma180_pm_ops)
|
|
#else
|
|
#define BMA180_PM_OPS NULL
|
|
#endif
|
|
|
|
static const struct i2c_device_id bma180_ids[] = {
|
|
{ "bma180", BMA180 },
|
|
{ "bma250", BMA250 },
|
|
{ "bma254", BMA254 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, bma180_ids);
|
|
|
|
static const struct of_device_id bma180_of_match[] = {
|
|
{
|
|
.compatible = "bosch,bma180",
|
|
.data = (void *)BMA180
|
|
},
|
|
{
|
|
.compatible = "bosch,bma250",
|
|
.data = (void *)BMA250
|
|
},
|
|
{
|
|
.compatible = "bosch,bma254",
|
|
.data = (void *)BMA254
|
|
},
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, bma180_of_match);
|
|
|
|
static struct i2c_driver bma180_driver = {
|
|
.driver = {
|
|
.name = "bma180",
|
|
.pm = 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 BMA180/BMA25x triaxial acceleration sensor");
|
|
MODULE_LICENSE("GPL");
|