diff options
Diffstat (limited to 'drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c')
| -rw-r--r-- | drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 109 |
1 files changed, 21 insertions, 88 deletions
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c index b0f3da1976e4..d416990ae309 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -14,10 +14,10 @@ * (e.g. Gx, Gy, Gz, Ax, Ay, Az), then data are repeated depending on the * value of the decimation factor and ODR set for each FIFO data set. * - * LSM6DSO/LSM6DSOX/ASM330LHH/LSM6DSR/ISM330DHCX: The FIFO buffer can be - * configured to store data from gyroscope and accelerometer. Each sample - * is queued with a tag (1B) indicating data source (gyroscope, accelerometer, - * hw timer). + * LSM6DSO/LSM6DSOX/ASM330LHH/LSM6DSR/LSM6DSRX/ISM330DHCX: + * The FIFO buffer can be configured to store data from gyroscope and + * accelerometer. Each sample is queued with a tag (1B) indicating data + * source (gyroscope, accelerometer, hw timer). * * FIFO supported modes: * - BYPASS: FIFO disabled @@ -30,8 +30,6 @@ * Denis Ciocca <denis.ciocca@st.com> */ #include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/irq.h> #include <linux/iio/kfifo_buf.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> @@ -42,10 +40,6 @@ #include "st_lsm6dsx.h" -#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12 -#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5) -#define ST_LSM6DSX_REG_PP_OD_ADDR 0x12 -#define ST_LSM6DSX_REG_PP_OD_MASK BIT(4) #define ST_LSM6DSX_REG_FIFO_MODE_ADDR 0x0a #define ST_LSM6DSX_FIFO_MODE_MASK GENMASK(2, 0) #define ST_LSM6DSX_FIFO_ODR_MASK GENMASK(6, 3) @@ -56,7 +50,6 @@ #define ST_LSM6DSX_MAX_FIFO_ODR_VAL 0x08 -#define ST_LSM6DSX_TS_SENSITIVITY 25000UL /* 25us */ #define ST_LSM6DSX_TS_RESET_VAL 0xaa struct st_lsm6dsx_decimator_entry { @@ -98,7 +91,7 @@ static int st_lsm6dsx_get_decimator_val(u8 val) } static void st_lsm6dsx_get_max_min_odr(struct st_lsm6dsx_hw *hw, - u16 *max_odr, u16 *min_odr) + u32 *max_odr, u32 *min_odr) { struct st_lsm6dsx_sensor *sensor; int i; @@ -113,16 +106,17 @@ static void st_lsm6dsx_get_max_min_odr(struct st_lsm6dsx_hw *hw, if (!(hw->enable_mask & BIT(sensor->id))) continue; - *max_odr = max_t(u16, *max_odr, sensor->odr); - *min_odr = min_t(u16, *min_odr, sensor->odr); + *max_odr = max_t(u32, *max_odr, sensor->odr); + *min_odr = min_t(u32, *min_odr, sensor->odr); } } static int st_lsm6dsx_update_decimators(struct st_lsm6dsx_hw *hw) { - u16 max_odr, min_odr, sip = 0, ts_sip = 0; const struct st_lsm6dsx_reg *ts_dec_reg; struct st_lsm6dsx_sensor *sensor; + u16 sip = 0, ts_sip = 0; + u32 max_odr, min_odr; int err = 0, i; u8 data; @@ -429,7 +423,7 @@ int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw) */ if (!reset_ts && ts >= 0xff0000) reset_ts = true; - ts *= ST_LSM6DSX_TS_SENSITIVITY; + ts *= hw->ts_gain; offset += ST_LSM6DSX_SAMPLE_SIZE; } @@ -456,13 +450,19 @@ int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw) return read_len; } +#define ST_LSM6DSX_INVALID_SAMPLE 0x7ffd static int st_lsm6dsx_push_tagged_data(struct st_lsm6dsx_hw *hw, u8 tag, u8 *data, s64 ts) { + s16 val = le16_to_cpu(*(__le16 *)data); struct st_lsm6dsx_sensor *sensor; struct iio_dev *iio_dev; + /* invalid sample during bootstrap phase */ + if (val >= ST_LSM6DSX_INVALID_SAMPLE) + return -EINVAL; + /* * EXT_TAG are managed in FIFO fashion so ST_LSM6DSX_EXT0_TAG * corresponds to the first enabled channel, ST_LSM6DSX_EXT1_TAG @@ -572,7 +572,7 @@ int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw) */ if (!reset_ts && ts >= 0xffff0000) reset_ts = true; - ts *= ST_LSM6DSX_TS_SENSITIVITY; + ts *= hw->ts_gain; } else { st_lsm6dsx_push_tagged_data(hw, tag, iio_buff, ts); @@ -592,6 +592,9 @@ int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw) { int err; + if (!hw->settings->fifo_ops.read_fifo) + return -ENOTSUPP; + mutex_lock(&hw->fifo_lock); hw->settings->fifo_ops.read_fifo(hw); @@ -654,25 +657,6 @@ out: return err; } -static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private) -{ - struct st_lsm6dsx_hw *hw = private; - - return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE; -} - -static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private) -{ - struct st_lsm6dsx_hw *hw = private; - int count; - - mutex_lock(&hw->fifo_lock); - count = hw->settings->fifo_ops.read_fifo(hw); - mutex_unlock(&hw->fifo_lock); - - return count ? IRQ_HANDLED : IRQ_NONE; -} - static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev) { struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev); @@ -702,59 +686,8 @@ static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = { int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw) { - struct device_node *np = hw->dev->of_node; - struct st_sensors_platform_data *pdata; struct iio_buffer *buffer; - unsigned long irq_type; - bool irq_active_low; - int i, err; - - irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq)); - - switch (irq_type) { - case IRQF_TRIGGER_HIGH: - case IRQF_TRIGGER_RISING: - irq_active_low = false; - break; - case IRQF_TRIGGER_LOW: - case IRQF_TRIGGER_FALLING: - irq_active_low = true; - break; - default: - dev_info(hw->dev, "mode %lx unsupported\n", irq_type); - return -EINVAL; - } - - err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_HLACTIVE_ADDR, - ST_LSM6DSX_REG_HLACTIVE_MASK, - FIELD_PREP(ST_LSM6DSX_REG_HLACTIVE_MASK, - irq_active_low)); - if (err < 0) - return err; - - pdata = (struct st_sensors_platform_data *)hw->dev->platform_data; - if ((np && of_property_read_bool(np, "drive-open-drain")) || - (pdata && pdata->open_drain)) { - err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_PP_OD_ADDR, - ST_LSM6DSX_REG_PP_OD_MASK, - FIELD_PREP(ST_LSM6DSX_REG_PP_OD_MASK, - 1)); - if (err < 0) - return err; - - irq_type |= IRQF_SHARED; - } - - err = devm_request_threaded_irq(hw->dev, hw->irq, - st_lsm6dsx_handler_irq, - st_lsm6dsx_handler_thread, - irq_type | IRQF_ONESHOT, - "lsm6dsx", hw); - if (err) { - dev_err(hw->dev, "failed to request trigger irq %d\n", - hw->irq); - return err; - } + int i; for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) { if (!hw->iio_devs[i]) |