+++ /dev/null
-/*
- * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
- * - BMC150
- * - BMI055
- * - BMA255
- * - BMA250E
- * - BMA222E
- * - BMA280
- *
- * Copyright (c) 2014, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/acpi.h>
-#include <linux/gpio/consumer.h>
-#include <linux/pm.h>
-#include <linux/pm_runtime.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/events.h>
-#include <linux/iio/trigger.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/triggered_buffer.h>
-
-#define BMC150_ACCEL_DRV_NAME "bmc150_accel"
-#define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event"
-#define BMC150_ACCEL_GPIO_NAME "bmc150_accel_int"
-
-#define BMC150_ACCEL_REG_CHIP_ID 0x00
-
-#define BMC150_ACCEL_REG_INT_STATUS_2 0x0B
-#define BMC150_ACCEL_ANY_MOTION_MASK 0x07
-#define BMC150_ACCEL_ANY_MOTION_BIT_X BIT(0)
-#define BMC150_ACCEL_ANY_MOTION_BIT_Y BIT(1)
-#define BMC150_ACCEL_ANY_MOTION_BIT_Z BIT(2)
-#define BMC150_ACCEL_ANY_MOTION_BIT_SIGN BIT(3)
-
-#define BMC150_ACCEL_REG_PMU_LPW 0x11
-#define BMC150_ACCEL_PMU_MODE_MASK 0xE0
-#define BMC150_ACCEL_PMU_MODE_SHIFT 5
-#define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_MASK 0x17
-#define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT 1
-
-#define BMC150_ACCEL_REG_PMU_RANGE 0x0F
-
-#define BMC150_ACCEL_DEF_RANGE_2G 0x03
-#define BMC150_ACCEL_DEF_RANGE_4G 0x05
-#define BMC150_ACCEL_DEF_RANGE_8G 0x08
-#define BMC150_ACCEL_DEF_RANGE_16G 0x0C
-
-/* Default BW: 125Hz */
-#define BMC150_ACCEL_REG_PMU_BW 0x10
-#define BMC150_ACCEL_DEF_BW 125
-
-#define BMC150_ACCEL_REG_INT_MAP_0 0x19
-#define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE BIT(2)
-
-#define BMC150_ACCEL_REG_INT_MAP_1 0x1A
-#define BMC150_ACCEL_INT_MAP_1_BIT_DATA BIT(0)
-#define BMC150_ACCEL_INT_MAP_1_BIT_FWM BIT(1)
-#define BMC150_ACCEL_INT_MAP_1_BIT_FFULL BIT(2)
-
-#define BMC150_ACCEL_REG_INT_RST_LATCH 0x21
-#define BMC150_ACCEL_INT_MODE_LATCH_RESET 0x80
-#define BMC150_ACCEL_INT_MODE_LATCH_INT 0x0F
-#define BMC150_ACCEL_INT_MODE_NON_LATCH_INT 0x00
-
-#define BMC150_ACCEL_REG_INT_EN_0 0x16
-#define BMC150_ACCEL_INT_EN_BIT_SLP_X BIT(0)
-#define BMC150_ACCEL_INT_EN_BIT_SLP_Y BIT(1)
-#define BMC150_ACCEL_INT_EN_BIT_SLP_Z BIT(2)
-
-#define BMC150_ACCEL_REG_INT_EN_1 0x17
-#define BMC150_ACCEL_INT_EN_BIT_DATA_EN BIT(4)
-#define BMC150_ACCEL_INT_EN_BIT_FFULL_EN BIT(5)
-#define BMC150_ACCEL_INT_EN_BIT_FWM_EN BIT(6)
-
-#define BMC150_ACCEL_REG_INT_OUT_CTRL 0x20
-#define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL BIT(0)
-
-#define BMC150_ACCEL_REG_INT_5 0x27
-#define BMC150_ACCEL_SLOPE_DUR_MASK 0x03
-
-#define BMC150_ACCEL_REG_INT_6 0x28
-#define BMC150_ACCEL_SLOPE_THRES_MASK 0xFF
-
-/* Slope duration in terms of number of samples */
-#define BMC150_ACCEL_DEF_SLOPE_DURATION 1
-/* in terms of multiples of g's/LSB, based on range */
-#define BMC150_ACCEL_DEF_SLOPE_THRESHOLD 1
-
-#define BMC150_ACCEL_REG_XOUT_L 0x02
-
-#define BMC150_ACCEL_MAX_STARTUP_TIME_MS 100
-
-/* Sleep Duration values */
-#define BMC150_ACCEL_SLEEP_500_MICRO 0x05
-#define BMC150_ACCEL_SLEEP_1_MS 0x06
-#define BMC150_ACCEL_SLEEP_2_MS 0x07
-#define BMC150_ACCEL_SLEEP_4_MS 0x08
-#define BMC150_ACCEL_SLEEP_6_MS 0x09
-#define BMC150_ACCEL_SLEEP_10_MS 0x0A
-#define BMC150_ACCEL_SLEEP_25_MS 0x0B
-#define BMC150_ACCEL_SLEEP_50_MS 0x0C
-#define BMC150_ACCEL_SLEEP_100_MS 0x0D
-#define BMC150_ACCEL_SLEEP_500_MS 0x0E
-#define BMC150_ACCEL_SLEEP_1_SEC 0x0F
-
-#define BMC150_ACCEL_REG_TEMP 0x08
-#define BMC150_ACCEL_TEMP_CENTER_VAL 24
-
-#define BMC150_ACCEL_AXIS_TO_REG(axis) (BMC150_ACCEL_REG_XOUT_L + (axis * 2))
-#define BMC150_AUTO_SUSPEND_DELAY_MS 2000
-
-#define BMC150_ACCEL_REG_FIFO_STATUS 0x0E
-#define BMC150_ACCEL_REG_FIFO_CONFIG0 0x30
-#define BMC150_ACCEL_REG_FIFO_CONFIG1 0x3E
-#define BMC150_ACCEL_REG_FIFO_DATA 0x3F
-#define BMC150_ACCEL_FIFO_LENGTH 32
-
-enum bmc150_accel_axis {
- AXIS_X,
- AXIS_Y,
- AXIS_Z,
-};
-
-enum bmc150_power_modes {
- BMC150_ACCEL_SLEEP_MODE_NORMAL,
- BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND,
- BMC150_ACCEL_SLEEP_MODE_LPM,
- BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04,
-};
-
-struct bmc150_scale_info {
- int scale;
- u8 reg_range;
-};
-
-struct bmc150_accel_chip_info {
- u8 chip_id;
- const struct iio_chan_spec *channels;
- int num_channels;
- const struct bmc150_scale_info scale_table[4];
-};
-
-struct bmc150_accel_interrupt {
- const struct bmc150_accel_interrupt_info *info;
- atomic_t users;
-};
-
-struct bmc150_accel_trigger {
- struct bmc150_accel_data *data;
- struct iio_trigger *indio_trig;
- int (*setup)(struct bmc150_accel_trigger *t, bool state);
- int intr;
- bool enabled;
-};
-
-enum bmc150_accel_interrupt_id {
- BMC150_ACCEL_INT_DATA_READY,
- BMC150_ACCEL_INT_ANY_MOTION,
- BMC150_ACCEL_INT_WATERMARK,
- BMC150_ACCEL_INTERRUPTS,
-};
-
-enum bmc150_accel_trigger_id {
- BMC150_ACCEL_TRIGGER_DATA_READY,
- BMC150_ACCEL_TRIGGER_ANY_MOTION,
- BMC150_ACCEL_TRIGGERS,
-};
-
-struct bmc150_accel_data {
- struct i2c_client *client;
- struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
- atomic_t active_intr;
- struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
- struct mutex mutex;
- u8 fifo_mode, watermark;
- s16 buffer[8];
- u8 bw_bits;
- u32 slope_dur;
- u32 slope_thres;
- u32 range;
- int ev_enable_state;
- int64_t timestamp, old_timestamp;
- const struct bmc150_accel_chip_info *chip_info;
-};
-
-static const struct {
- int val;
- int val2;
- u8 bw_bits;
-} bmc150_accel_samp_freq_table[] = { {15, 620000, 0x08},
- {31, 260000, 0x09},
- {62, 500000, 0x0A},
- {125, 0, 0x0B},
- {250, 0, 0x0C},
- {500, 0, 0x0D},
- {1000, 0, 0x0E},
- {2000, 0, 0x0F} };
-
-static const struct {
- int bw_bits;
- int msec;
-} bmc150_accel_sample_upd_time[] = { {0x08, 64},
- {0x09, 32},
- {0x0A, 16},
- {0x0B, 8},
- {0x0C, 4},
- {0x0D, 2},
- {0x0E, 1},
- {0x0F, 1} };
-
-static const struct {
- int sleep_dur;
- u8 reg_value;
-} bmc150_accel_sleep_value_table[] = { {0, 0},
- {500, BMC150_ACCEL_SLEEP_500_MICRO},
- {1000, BMC150_ACCEL_SLEEP_1_MS},
- {2000, BMC150_ACCEL_SLEEP_2_MS},
- {4000, BMC150_ACCEL_SLEEP_4_MS},
- {6000, BMC150_ACCEL_SLEEP_6_MS},
- {10000, BMC150_ACCEL_SLEEP_10_MS},
- {25000, BMC150_ACCEL_SLEEP_25_MS},
- {50000, BMC150_ACCEL_SLEEP_50_MS},
- {100000, BMC150_ACCEL_SLEEP_100_MS},
- {500000, BMC150_ACCEL_SLEEP_500_MS},
- {1000000, BMC150_ACCEL_SLEEP_1_SEC} };
-
-
-static int bmc150_accel_set_mode(struct bmc150_accel_data *data,
- enum bmc150_power_modes mode,
- int dur_us)
-{
- int i;
- int ret;
- u8 lpw_bits;
- int dur_val = -1;
-
- if (dur_us > 0) {
- for (i = 0; i < ARRAY_SIZE(bmc150_accel_sleep_value_table);
- ++i) {
- if (bmc150_accel_sleep_value_table[i].sleep_dur ==
- dur_us)
- dur_val =
- bmc150_accel_sleep_value_table[i].reg_value;
- }
- } else
- dur_val = 0;
-
- if (dur_val < 0)
- return -EINVAL;
-
- lpw_bits = mode << BMC150_ACCEL_PMU_MODE_SHIFT;
- lpw_bits |= (dur_val << BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT);
-
- dev_dbg(&data->client->dev, "Set Mode bits %x\n", lpw_bits);
-
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_PMU_LPW, lpw_bits);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
- int val2)
-{
- int i;
- int ret;
-
- for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
- if (bmc150_accel_samp_freq_table[i].val == val &&
- bmc150_accel_samp_freq_table[i].val2 == val2) {
- ret = i2c_smbus_write_byte_data(
- data->client,
- BMC150_ACCEL_REG_PMU_BW,
- bmc150_accel_samp_freq_table[i].bw_bits);
- if (ret < 0)
- return ret;
-
- data->bw_bits =
- bmc150_accel_samp_freq_table[i].bw_bits;
- return 0;
- }
- }
-
- return -EINVAL;
-}
-
-static int bmc150_accel_update_slope(struct bmc150_accel_data *data)
-{
- int ret, val;
-
- ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6,
- data->slope_thres);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_int_6\n");
- return ret;
- }
-
- ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_int_5\n");
- return ret;
- }
-
- val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur;
- ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5,
- val);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error write reg_int_5\n");
- return ret;
- }
-
- dev_dbg(&data->client->dev, "%s: %x %x\n", __func__, data->slope_thres,
- data->slope_dur);
-
- return ret;
-}
-
-static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t,
- bool state)
-{
- if (state)
- return bmc150_accel_update_slope(t->data);
-
- return 0;
-}
-
-static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
-{
- int ret;
-
- ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID);
- if (ret < 0) {
- dev_err(&data->client->dev,
- "Error: Reading chip id\n");
- return ret;
- }
-
- dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
- if (ret != data->chip_info->chip_id) {
- dev_err(&data->client->dev, "Invalid chip %x\n", ret);
- return -ENODEV;
- }
-
- ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
- if (ret < 0)
- return ret;
-
- /* Set Bandwidth */
- ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0);
- if (ret < 0)
- return ret;
-
- /* Set Default Range */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_PMU_RANGE,
- BMC150_ACCEL_DEF_RANGE_4G);
- if (ret < 0) {
- dev_err(&data->client->dev,
- "Error writing reg_pmu_range\n");
- return ret;
- }
-
- data->range = BMC150_ACCEL_DEF_RANGE_4G;
-
- /* Set default slope duration and thresholds */
- data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
- data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
- ret = bmc150_accel_update_slope(data);
- if (ret < 0)
- return ret;
-
- /* Set default as latched interrupts */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_RST_LATCH,
- BMC150_ACCEL_INT_MODE_LATCH_INT |
- BMC150_ACCEL_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(&data->client->dev,
- "Error writing reg_int_rst_latch\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val,
- int *val2)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
- if (bmc150_accel_samp_freq_table[i].bw_bits == data->bw_bits) {
- *val = bmc150_accel_samp_freq_table[i].val;
- *val2 = bmc150_accel_samp_freq_table[i].val2;
- return IIO_VAL_INT_PLUS_MICRO;
- }
- }
-
- return -EINVAL;
-}
-
-#ifdef CONFIG_PM
-static int bmc150_accel_get_startup_times(struct bmc150_accel_data *data)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(bmc150_accel_sample_upd_time); ++i) {
- if (bmc150_accel_sample_upd_time[i].bw_bits == data->bw_bits)
- return bmc150_accel_sample_upd_time[i].msec;
- }
-
- return BMC150_ACCEL_MAX_STARTUP_TIME_MS;
-}
-
-static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
-{
- int ret;
-
- if (on)
- ret = pm_runtime_get_sync(&data->client->dev);
- else {
- pm_runtime_mark_last_busy(&data->client->dev);
- ret = pm_runtime_put_autosuspend(&data->client->dev);
- }
- if (ret < 0) {
- dev_err(&data->client->dev,
- "Failed: bmc150_accel_set_power_state for %d\n", on);
- if (on)
- pm_runtime_put_noidle(&data->client->dev);
-
- return ret;
- }
-
- return 0;
-}
-#else
-static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
-{
- return 0;
-}
-#endif
-
-static const struct bmc150_accel_interrupt_info {
- u8 map_reg;
- u8 map_bitmask;
- u8 en_reg;
- u8 en_bitmask;
-} bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = {
- { /* data ready interrupt */
- .map_reg = BMC150_ACCEL_REG_INT_MAP_1,
- .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA,
- .en_reg = BMC150_ACCEL_REG_INT_EN_1,
- .en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN,
- },
- { /* motion interrupt */
- .map_reg = BMC150_ACCEL_REG_INT_MAP_0,
- .map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE,
- .en_reg = BMC150_ACCEL_REG_INT_EN_0,
- .en_bitmask = BMC150_ACCEL_INT_EN_BIT_SLP_X |
- BMC150_ACCEL_INT_EN_BIT_SLP_Y |
- BMC150_ACCEL_INT_EN_BIT_SLP_Z
- },
- { /* fifo watermark interrupt */
- .map_reg = BMC150_ACCEL_REG_INT_MAP_1,
- .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM,
- .en_reg = BMC150_ACCEL_REG_INT_EN_1,
- .en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN,
- },
-};
-
-static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev,
- struct bmc150_accel_data *data)
-{
- int i;
-
- for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++)
- data->interrupts[i].info = &bmc150_accel_interrupts[i];
-}
-
-static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i,
- bool state)
-{
- struct bmc150_accel_interrupt *intr = &data->interrupts[i];
- const struct bmc150_accel_interrupt_info *info = intr->info;
- int ret;
-
- if (state) {
- if (atomic_inc_return(&intr->users) > 1)
- return 0;
- } else {
- if (atomic_dec_return(&intr->users) > 0)
- return 0;
- }
-
- /*
- * We will expect the enable and disable to do operation in
- * in reverse order. This will happen here anyway as our
- * resume operation uses sync mode runtime pm calls, the
- * suspend operation will be delayed by autosuspend delay
- * So the disable operation will still happen in reverse of
- * enable operation. When runtime pm is disabled the mode
- * is always on so sequence doesn't matter
- */
- ret = bmc150_accel_set_power_state(data, state);
- if (ret < 0)
- return ret;
-
- /* map the interrupt to the appropriate pins */
- ret = i2c_smbus_read_byte_data(data->client, info->map_reg);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_int_map\n");
- goto out_fix_power_state;
- }
- if (state)
- ret |= info->map_bitmask;
- else
- ret &= ~info->map_bitmask;
-
- ret = i2c_smbus_write_byte_data(data->client, info->map_reg,
- ret);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_int_map\n");
- goto out_fix_power_state;
- }
-
- /* enable/disable the interrupt */
- ret = i2c_smbus_read_byte_data(data->client, info->en_reg);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_int_en\n");
- goto out_fix_power_state;
- }
-
- if (state)
- ret |= info->en_bitmask;
- else
- ret &= ~info->en_bitmask;
-
- ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_int_en\n");
- goto out_fix_power_state;
- }
-
- if (state)
- atomic_inc(&data->active_intr);
- else
- atomic_dec(&data->active_intr);
-
- return 0;
-
-out_fix_power_state:
- bmc150_accel_set_power_state(data, false);
- return ret;
-}
-
-
-static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val)
-{
- int ret, i;
-
- for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) {
- if (data->chip_info->scale_table[i].scale == val) {
- ret = i2c_smbus_write_byte_data(
- data->client,
- BMC150_ACCEL_REG_PMU_RANGE,
- data->chip_info->scale_table[i].reg_range);
- if (ret < 0) {
- dev_err(&data->client->dev,
- "Error writing pmu_range\n");
- return ret;
- }
-
- data->range = data->chip_info->scale_table[i].reg_range;
- return 0;
- }
- }
-
- return -EINVAL;
-}
-
-static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val)
-{
- int ret;
-
- mutex_lock(&data->mutex);
-
- ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_TEMP);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_temp\n");
- mutex_unlock(&data->mutex);
- return ret;
- }
- *val = sign_extend32(ret, 7);
-
- mutex_unlock(&data->mutex);
-
- return IIO_VAL_INT;
-}
-
-static int bmc150_accel_get_axis(struct bmc150_accel_data *data,
- struct iio_chan_spec const *chan,
- int *val)
-{
- int ret;
- int axis = chan->scan_index;
-
- mutex_lock(&data->mutex);
- ret = bmc150_accel_set_power_state(data, true);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- ret = i2c_smbus_read_word_data(data->client,
- BMC150_ACCEL_AXIS_TO_REG(axis));
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading axis %d\n", axis);
- bmc150_accel_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- return ret;
- }
- *val = sign_extend32(ret >> chan->scan_type.shift,
- chan->scan_type.realbits - 1);
- ret = bmc150_accel_set_power_state(data, false);
- mutex_unlock(&data->mutex);
- if (ret < 0)
- return ret;
-
- return IIO_VAL_INT;
-}
-
-static int bmc150_accel_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long mask)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- switch (chan->type) {
- case IIO_TEMP:
- return bmc150_accel_get_temp(data, val);
- case IIO_ACCEL:
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
- else
- return bmc150_accel_get_axis(data, chan, val);
- default:
- return -EINVAL;
- }
- case IIO_CHAN_INFO_OFFSET:
- if (chan->type == IIO_TEMP) {
- *val = BMC150_ACCEL_TEMP_CENTER_VAL;
- return IIO_VAL_INT;
- } else
- return -EINVAL;
- case IIO_CHAN_INFO_SCALE:
- *val = 0;
- switch (chan->type) {
- case IIO_TEMP:
- *val2 = 500000;
- return IIO_VAL_INT_PLUS_MICRO;
- case IIO_ACCEL:
- {
- int i;
- const struct bmc150_scale_info *si;
- int st_size = ARRAY_SIZE(data->chip_info->scale_table);
-
- for (i = 0; i < st_size; ++i) {
- si = &data->chip_info->scale_table[i];
- if (si->reg_range == data->range) {
- *val2 = si->scale;
- return IIO_VAL_INT_PLUS_MICRO;
- }
- }
- return -EINVAL;
- }
- default:
- return -EINVAL;
- }
- case IIO_CHAN_INFO_SAMP_FREQ:
- mutex_lock(&data->mutex);
- ret = bmc150_accel_get_bw(data, val, val2);
- mutex_unlock(&data->mutex);
- return ret;
- default:
- return -EINVAL;
- }
-}
-
-static int bmc150_accel_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val, int val2, long mask)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_SAMP_FREQ:
- mutex_lock(&data->mutex);
- ret = bmc150_accel_set_bw(data, val, val2);
- mutex_unlock(&data->mutex);
- break;
- case IIO_CHAN_INFO_SCALE:
- if (val)
- return -EINVAL;
-
- mutex_lock(&data->mutex);
- ret = bmc150_accel_set_scale(data, val2);
- mutex_unlock(&data->mutex);
- return ret;
- default:
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-static int bmc150_accel_read_event(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir,
- enum iio_event_info info,
- int *val, int *val2)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- *val2 = 0;
- switch (info) {
- case IIO_EV_INFO_VALUE:
- *val = data->slope_thres;
- break;
- case IIO_EV_INFO_PERIOD:
- *val = data->slope_dur;
- break;
- default:
- return -EINVAL;
- }
-
- return IIO_VAL_INT;
-}
-
-static int bmc150_accel_write_event(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir,
- enum iio_event_info info,
- int val, int val2)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- if (data->ev_enable_state)
- return -EBUSY;
-
- switch (info) {
- case IIO_EV_INFO_VALUE:
- data->slope_thres = val & 0xFF;
- break;
- case IIO_EV_INFO_PERIOD:
- data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int bmc150_accel_read_event_config(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir)
-{
-
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- return data->ev_enable_state;
-}
-
-static int bmc150_accel_write_event_config(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir,
- int state)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret;
-
- if (state == data->ev_enable_state)
- return 0;
-
- mutex_lock(&data->mutex);
-
- ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION,
- state);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- data->ev_enable_state = state;
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev,
- struct iio_trigger *trig)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int i;
-
- for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
- if (data->triggers[i].indio_trig == trig)
- return 0;
- }
-
- return -EINVAL;
-}
-
-static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int wm;
-
- mutex_lock(&data->mutex);
- wm = data->watermark;
- mutex_unlock(&data->mutex);
-
- return sprintf(buf, "%d\n", wm);
-}
-
-static ssize_t bmc150_accel_get_fifo_state(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- bool state;
-
- mutex_lock(&data->mutex);
- state = data->fifo_mode;
- mutex_unlock(&data->mutex);
-
- return sprintf(buf, "%d\n", state);
-}
-
-static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
-static IIO_CONST_ATTR(hwfifo_watermark_max,
- __stringify(BMC150_ACCEL_FIFO_LENGTH));
-static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO,
- bmc150_accel_get_fifo_state, NULL, 0);
-static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO,
- bmc150_accel_get_fifo_watermark, NULL, 0);
-
-static const struct attribute *bmc150_accel_fifo_attributes[] = {
- &iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
- &iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
- &iio_dev_attr_hwfifo_watermark.dev_attr.attr,
- &iio_dev_attr_hwfifo_enabled.dev_attr.attr,
- NULL,
-};
-
-static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- if (val > BMC150_ACCEL_FIFO_LENGTH)
- val = BMC150_ACCEL_FIFO_LENGTH;
-
- mutex_lock(&data->mutex);
- data->watermark = val;
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-/*
- * We must read at least one full frame in one burst, otherwise the rest of the
- * frame data is discarded.
- */
-static int bmc150_accel_fifo_transfer(const struct i2c_client *client,
- char *buffer, int samples)
-{
- int sample_length = 3 * 2;
- u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA;
- int ret = -EIO;
-
- if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
- struct i2c_msg msg[2] = {
- {
- .addr = client->addr,
- .flags = 0,
- .buf = ®_fifo_data,
- .len = sizeof(reg_fifo_data),
- },
- {
- .addr = client->addr,
- .flags = I2C_M_RD,
- .buf = (u8 *)buffer,
- .len = samples * sample_length,
- }
- };
-
- ret = i2c_transfer(client->adapter, msg, 2);
- if (ret != 2)
- ret = -EIO;
- else
- ret = 0;
- } else {
- int i, step = I2C_SMBUS_BLOCK_MAX / sample_length;
-
- for (i = 0; i < samples * sample_length; i += step) {
- ret = i2c_smbus_read_i2c_block_data(client,
- reg_fifo_data, step,
- &buffer[i]);
- if (ret != step) {
- ret = -EIO;
- break;
- }
-
- ret = 0;
- }
- }
-
- if (ret)
- dev_err(&client->dev, "Error transferring data from fifo\n");
-
- return ret;
-}
-
-static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
- unsigned samples, bool irq)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret, i;
- u8 count;
- u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];
- int64_t tstamp;
- uint64_t sample_period;
- ret = i2c_smbus_read_byte_data(data->client,
- BMC150_ACCEL_REG_FIFO_STATUS);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_fifo_status\n");
- return ret;
- }
-
- count = ret & 0x7F;
-
- if (!count)
- return 0;
-
- /*
- * If we getting called from IRQ handler we know the stored timestamp is
- * fairly accurate for the last stored sample. Otherwise, if we are
- * called as a result of a read operation from userspace and hence
- * before the watermark interrupt was triggered, take a timestamp
- * now. We can fall anywhere in between two samples so the error in this
- * case is at most one sample period.
- */
- if (!irq) {
- data->old_timestamp = data->timestamp;
- data->timestamp = iio_get_time_ns();
- }
-
- /*
- * Approximate timestamps for each of the sample based on the sampling
- * frequency, timestamp for last sample and number of samples.
- *
- * Note that we can't use the current bandwidth settings to compute the
- * sample period because the sample rate varies with the device
- * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That
- * small variation adds when we store a large number of samples and
- * creates significant jitter between the last and first samples in
- * different batches (e.g. 32ms vs 21ms).
- *
- * To avoid this issue we compute the actual sample period ourselves
- * based on the timestamp delta between the last two flush operations.
- */
- sample_period = (data->timestamp - data->old_timestamp);
- do_div(sample_period, count);
- tstamp = data->timestamp - (count - 1) * sample_period;
-
- if (samples && count > samples)
- count = samples;
-
- ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count);
- if (ret)
- return ret;
-
- /*
- * Ideally we want the IIO core to handle the demux when running in fifo
- * mode but not when running in triggered buffer mode. Unfortunately
- * this does not seem to be possible, so stick with driver demux for
- * now.
- */
- for (i = 0; i < count; i++) {
- u16 sample[8];
- int j, bit;
-
- j = 0;
- for_each_set_bit(bit, indio_dev->active_scan_mask,
- indio_dev->masklength)
- memcpy(&sample[j++], &buffer[i * 3 + bit], 2);
-
- iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp);
-
- tstamp += sample_period;
- }
-
- return count;
-}
-
-static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret;
-
- mutex_lock(&data->mutex);
- ret = __bmc150_accel_fifo_flush(indio_dev, samples, false);
- mutex_unlock(&data->mutex);
-
- return ret;
-}
-
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
- "15.620000 31.260000 62.50000 125 250 500 1000 2000");
-
-static struct attribute *bmc150_accel_attributes[] = {
- &iio_const_attr_sampling_frequency_available.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group bmc150_accel_attrs_group = {
- .attrs = bmc150_accel_attributes,
-};
-
-static const struct iio_event_spec bmc150_accel_event = {
- .type = IIO_EV_TYPE_ROC,
- .dir = IIO_EV_DIR_EITHER,
- .mask_separate = BIT(IIO_EV_INFO_VALUE) |
- BIT(IIO_EV_INFO_ENABLE) |
- BIT(IIO_EV_INFO_PERIOD)
-};
-
-#define BMC150_ACCEL_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_SAMP_FREQ), \
- .scan_index = AXIS_##_axis, \
- .scan_type = { \
- .sign = 's', \
- .realbits = (bits), \
- .storagebits = 16, \
- .shift = 16 - (bits), \
- }, \
- .event_spec = &bmc150_accel_event, \
- .num_event_specs = 1 \
-}
-
-#define BMC150_ACCEL_CHANNELS(bits) { \
- { \
- .type = IIO_TEMP, \
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
- BIT(IIO_CHAN_INFO_SCALE) | \
- BIT(IIO_CHAN_INFO_OFFSET), \
- .scan_index = -1, \
- }, \
- BMC150_ACCEL_CHANNEL(X, bits), \
- BMC150_ACCEL_CHANNEL(Y, bits), \
- BMC150_ACCEL_CHANNEL(Z, bits), \
- IIO_CHAN_SOFT_TIMESTAMP(3), \
-}
-
-static const struct iio_chan_spec bma222e_accel_channels[] =
- BMC150_ACCEL_CHANNELS(8);
-static const struct iio_chan_spec bma250e_accel_channels[] =
- BMC150_ACCEL_CHANNELS(10);
-static const struct iio_chan_spec bmc150_accel_channels[] =
- BMC150_ACCEL_CHANNELS(12);
-static const struct iio_chan_spec bma280_accel_channels[] =
- BMC150_ACCEL_CHANNELS(14);
-
-enum {
- bmc150,
- bmi055,
- bma255,
- bma250e,
- bma222e,
- bma280,
-};
-
-static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
- [bmc150] = {
- .chip_id = 0xFA,
- .channels = bmc150_accel_channels,
- .num_channels = ARRAY_SIZE(bmc150_accel_channels),
- .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
- {19122, BMC150_ACCEL_DEF_RANGE_4G},
- {38344, BMC150_ACCEL_DEF_RANGE_8G},
- {76590, BMC150_ACCEL_DEF_RANGE_16G} },
- },
- [bmi055] = {
- .chip_id = 0xFA,
- .channels = bmc150_accel_channels,
- .num_channels = ARRAY_SIZE(bmc150_accel_channels),
- .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
- {19122, BMC150_ACCEL_DEF_RANGE_4G},
- {38344, BMC150_ACCEL_DEF_RANGE_8G},
- {76590, BMC150_ACCEL_DEF_RANGE_16G} },
- },
- [bma255] = {
- .chip_id = 0xFA,
- .channels = bmc150_accel_channels,
- .num_channels = ARRAY_SIZE(bmc150_accel_channels),
- .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
- {19122, BMC150_ACCEL_DEF_RANGE_4G},
- {38344, BMC150_ACCEL_DEF_RANGE_8G},
- {76590, BMC150_ACCEL_DEF_RANGE_16G} },
- },
- [bma250e] = {
- .chip_id = 0xF9,
- .channels = bma250e_accel_channels,
- .num_channels = ARRAY_SIZE(bma250e_accel_channels),
- .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G},
- {76590, BMC150_ACCEL_DEF_RANGE_4G},
- {153277, BMC150_ACCEL_DEF_RANGE_8G},
- {306457, BMC150_ACCEL_DEF_RANGE_16G} },
- },
- [bma222e] = {
- .chip_id = 0xF8,
- .channels = bma222e_accel_channels,
- .num_channels = ARRAY_SIZE(bma222e_accel_channels),
- .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G},
- {306457, BMC150_ACCEL_DEF_RANGE_4G},
- {612915, BMC150_ACCEL_DEF_RANGE_8G},
- {1225831, BMC150_ACCEL_DEF_RANGE_16G} },
- },
- [bma280] = {
- .chip_id = 0xFB,
- .channels = bma280_accel_channels,
- .num_channels = ARRAY_SIZE(bma280_accel_channels),
- .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G},
- {4785, BMC150_ACCEL_DEF_RANGE_4G},
- {9581, BMC150_ACCEL_DEF_RANGE_8G},
- {19152, BMC150_ACCEL_DEF_RANGE_16G} },
- },
-};
-
-static const struct iio_info bmc150_accel_info = {
- .attrs = &bmc150_accel_attrs_group,
- .read_raw = bmc150_accel_read_raw,
- .write_raw = bmc150_accel_write_raw,
- .read_event_value = bmc150_accel_read_event,
- .write_event_value = bmc150_accel_write_event,
- .write_event_config = bmc150_accel_write_event_config,
- .read_event_config = bmc150_accel_read_event_config,
- .validate_trigger = bmc150_accel_validate_trigger,
- .driver_module = THIS_MODULE,
-};
-
-static const struct iio_info bmc150_accel_info_fifo = {
- .attrs = &bmc150_accel_attrs_group,
- .read_raw = bmc150_accel_read_raw,
- .write_raw = bmc150_accel_write_raw,
- .read_event_value = bmc150_accel_read_event,
- .write_event_value = bmc150_accel_write_event,
- .write_event_config = bmc150_accel_write_event_config,
- .read_event_config = bmc150_accel_read_event_config,
- .validate_trigger = bmc150_accel_validate_trigger,
- .hwfifo_set_watermark = bmc150_accel_set_watermark,
- .hwfifo_flush_to_buffer = bmc150_accel_fifo_flush,
- .driver_module = THIS_MODULE,
-};
-
-static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct bmc150_accel_data *data = iio_priv(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 = i2c_smbus_read_word_data(data->client,
- BMC150_ACCEL_AXIS_TO_REG(bit));
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- goto err_read;
- }
- data->buffer[i++] = ret;
- }
- mutex_unlock(&data->mutex);
-
- iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
- data->timestamp);
-err_read:
- iio_trigger_notify_done(indio_dev->trig);
-
- return IRQ_HANDLED;
-}
-
-static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
-{
- struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
- struct bmc150_accel_data *data = t->data;
- int ret;
-
- /* new data interrupts don't need ack */
- if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY])
- return 0;
-
- mutex_lock(&data->mutex);
- /* clear any latched interrupt */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_RST_LATCH,
- BMC150_ACCEL_INT_MODE_LATCH_INT |
- BMC150_ACCEL_INT_MODE_LATCH_RESET);
- mutex_unlock(&data->mutex);
- if (ret < 0) {
- dev_err(&data->client->dev,
- "Error writing reg_int_rst_latch\n");
- return ret;
- }
-
- return 0;
-}
-
-static int bmc150_accel_trigger_set_state(struct iio_trigger *trig,
- bool state)
-{
- struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
- struct bmc150_accel_data *data = t->data;
- int ret;
-
- mutex_lock(&data->mutex);
-
- if (t->enabled == state) {
- mutex_unlock(&data->mutex);
- return 0;
- }
-
- if (t->setup) {
- ret = t->setup(t, state);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
- }
-
- ret = bmc150_accel_set_interrupt(data, t->intr, state);
- if (ret < 0) {
- mutex_unlock(&data->mutex);
- return ret;
- }
-
- t->enabled = state;
-
- mutex_unlock(&data->mutex);
-
- return ret;
-}
-
-static const struct iio_trigger_ops bmc150_accel_trigger_ops = {
- .set_trigger_state = bmc150_accel_trigger_set_state,
- .try_reenable = bmc150_accel_trig_try_reen,
- .owner = THIS_MODULE,
-};
-
-static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int dir;
- int ret;
-
- ret = i2c_smbus_read_byte_data(data->client,
- BMC150_ACCEL_REG_INT_STATUS_2);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error reading reg_int_status_2\n");
- return ret;
- }
-
- if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN)
- dir = IIO_EV_DIR_FALLING;
- else
- dir = IIO_EV_DIR_RISING;
-
- if (ret & BMC150_ACCEL_ANY_MOTION_BIT_X)
- iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_X,
- IIO_EV_TYPE_ROC,
- dir),
- data->timestamp);
- if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Y)
- iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_Y,
- IIO_EV_TYPE_ROC,
- dir),
- data->timestamp);
- if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Z)
- iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_Z,
- IIO_EV_TYPE_ROC,
- dir),
- data->timestamp);
- return ret;
-}
-
-static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- bool ack = false;
- int ret;
-
- mutex_lock(&data->mutex);
-
- if (data->fifo_mode) {
- ret = __bmc150_accel_fifo_flush(indio_dev,
- BMC150_ACCEL_FIFO_LENGTH, true);
- if (ret > 0)
- ack = true;
- }
-
- if (data->ev_enable_state) {
- ret = bmc150_accel_handle_roc_event(indio_dev);
- if (ret > 0)
- ack = true;
- }
-
- if (ack) {
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_RST_LATCH,
- BMC150_ACCEL_INT_MODE_LATCH_INT |
- BMC150_ACCEL_INT_MODE_LATCH_RESET);
- if (ret)
- dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
- ret = IRQ_HANDLED;
- } else {
- ret = IRQ_NONE;
- }
-
- mutex_unlock(&data->mutex);
-
- return ret;
-}
-
-static irqreturn_t bmc150_accel_irq_handler(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- bool ack = false;
- int i;
-
- data->old_timestamp = data->timestamp;
- data->timestamp = iio_get_time_ns();
-
- for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
- if (data->triggers[i].enabled) {
- iio_trigger_poll(data->triggers[i].indio_trig);
- ack = true;
- break;
- }
- }
-
- if (data->ev_enable_state || data->fifo_mode)
- return IRQ_WAKE_THREAD;
-
- if (ack)
- return IRQ_HANDLED;
-
- return IRQ_NONE;
-}
-
-static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data)
-{
- const struct acpi_device_id *id;
-
- id = acpi_match_device(dev->driver->acpi_match_table, dev);
-
- if (!id)
- return NULL;
-
- *data = (int) id->driver_data;
-
- return dev_name(dev);
-}
-
-static int bmc150_accel_gpio_probe(struct i2c_client *client,
- struct bmc150_accel_data *data)
-{
- struct device *dev;
- struct gpio_desc *gpio;
- int ret;
-
- if (!client)
- return -EINVAL;
-
- dev = &client->dev;
-
- /* data ready gpio interrupt pin */
- gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0, GPIOD_IN);
- if (IS_ERR(gpio)) {
- dev_err(dev, "Failed: gpio get index\n");
- return PTR_ERR(gpio);
- }
-
- ret = gpiod_to_irq(gpio);
-
- dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
-
- return ret;
-}
-
-static const struct {
- int intr;
- const char *name;
- int (*setup)(struct bmc150_accel_trigger *t, bool state);
-} bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = {
- {
- .intr = 0,
- .name = "%s-dev%d",
- },
- {
- .intr = 1,
- .name = "%s-any-motion-dev%d",
- .setup = bmc150_accel_any_motion_setup,
- },
-};
-
-static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data,
- int from)
-{
- int i;
-
- for (i = from; i >= 0; i--) {
- if (data->triggers[i].indio_trig) {
- iio_trigger_unregister(data->triggers[i].indio_trig);
- data->triggers[i].indio_trig = NULL;
- }
- }
-}
-
-static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev,
- struct bmc150_accel_data *data)
-{
- int i, ret;
-
- for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
- struct bmc150_accel_trigger *t = &data->triggers[i];
-
- t->indio_trig = devm_iio_trigger_alloc(&data->client->dev,
- bmc150_accel_triggers[i].name,
- indio_dev->name,
- indio_dev->id);
- if (!t->indio_trig) {
- ret = -ENOMEM;
- break;
- }
-
- t->indio_trig->dev.parent = &data->client->dev;
- t->indio_trig->ops = &bmc150_accel_trigger_ops;
- t->intr = bmc150_accel_triggers[i].intr;
- t->data = data;
- t->setup = bmc150_accel_triggers[i].setup;
- iio_trigger_set_drvdata(t->indio_trig, t);
-
- ret = iio_trigger_register(t->indio_trig);
- if (ret)
- break;
- }
-
- if (ret)
- bmc150_accel_unregister_triggers(data, i - 1);
-
- return ret;
-}
-
-#define BMC150_ACCEL_FIFO_MODE_STREAM 0x80
-#define BMC150_ACCEL_FIFO_MODE_FIFO 0x40
-#define BMC150_ACCEL_FIFO_MODE_BYPASS 0x00
-
-static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
-{
- u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1;
- int ret;
-
- ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_fifo_config1\n");
- return ret;
- }
-
- if (!data->fifo_mode)
- return 0;
-
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_FIFO_CONFIG0,
- data->watermark);
- if (ret < 0)
- dev_err(&data->client->dev, "Error writing reg_fifo_config0\n");
-
- return ret;
-}
-
-static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret = 0;
-
- if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
- return iio_triggered_buffer_postenable(indio_dev);
-
- mutex_lock(&data->mutex);
-
- if (!data->watermark)
- goto out;
-
- ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
- true);
- if (ret)
- goto out;
-
- data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO;
-
- ret = bmc150_accel_fifo_set_mode(data);
- if (ret) {
- data->fifo_mode = 0;
- bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
- false);
- }
-
-out:
- mutex_unlock(&data->mutex);
-
- return ret;
-}
-
-static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev)
-{
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
- return iio_triggered_buffer_predisable(indio_dev);
-
- mutex_lock(&data->mutex);
-
- if (!data->fifo_mode)
- goto out;
-
- bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false);
- __bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false);
- data->fifo_mode = 0;
- bmc150_accel_fifo_set_mode(data);
-
-out:
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
- .postenable = bmc150_accel_buffer_postenable,
- .predisable = bmc150_accel_buffer_predisable,
-};
-
-static int bmc150_accel_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct bmc150_accel_data *data;
- struct iio_dev *indio_dev;
- int ret;
- const char *name = NULL;
- int chip_id = 0;
-
- indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
- if (!indio_dev)
- return -ENOMEM;
-
- data = iio_priv(indio_dev);
- i2c_set_clientdata(client, indio_dev);
- data->client = client;
-
- if (id) {
- name = id->name;
- chip_id = id->driver_data;
- }
-
- if (ACPI_HANDLE(&client->dev))
- name = bmc150_accel_match_acpi_device(&client->dev, &chip_id);
-
- data->chip_info = &bmc150_accel_chip_info_tbl[chip_id];
-
- ret = bmc150_accel_chip_init(data);
- if (ret < 0)
- return ret;
-
- mutex_init(&data->mutex);
-
- indio_dev->dev.parent = &client->dev;
- indio_dev->channels = data->chip_info->channels;
- indio_dev->num_channels = data->chip_info->num_channels;
- indio_dev->name = name;
- indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->info = &bmc150_accel_info;
-
- if (client->irq < 0)
- client->irq = bmc150_accel_gpio_probe(client, data);
-
- if (client->irq >= 0) {
- ret = devm_request_threaded_irq(
- &client->dev, client->irq,
- bmc150_accel_irq_handler,
- bmc150_accel_irq_thread_handler,
- IRQF_TRIGGER_RISING,
- BMC150_ACCEL_IRQ_NAME,
- indio_dev);
- if (ret)
- return ret;
-
- /*
- * Set latched mode interrupt. While certain interrupts are
- * non-latched regardless of this settings (e.g. new data) we
- * want to use latch mode when we can to prevent interrupt
- * flooding.
- */
- ret = i2c_smbus_write_byte_data(data->client,
- BMC150_ACCEL_REG_INT_RST_LATCH,
- BMC150_ACCEL_INT_MODE_LATCH_RESET);
- if (ret < 0) {
- dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
- return ret;
- }
-
- bmc150_accel_interrupts_setup(indio_dev, data);
-
- ret = bmc150_accel_triggers_setup(indio_dev, data);
- if (ret)
- return ret;
-
- ret = iio_triggered_buffer_setup(indio_dev,
- &iio_pollfunc_store_time,
- bmc150_accel_trigger_handler,
- &bmc150_accel_buffer_ops);
- if (ret < 0) {
- dev_err(&client->dev,
- "Failed: iio triggered buffer setup\n");
- goto err_trigger_unregister;
- }
-
- if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
- i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
- indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
- indio_dev->info = &bmc150_accel_info_fifo;
- indio_dev->buffer->attrs = bmc150_accel_fifo_attributes;
- }
- }
-
- ret = iio_device_register(indio_dev);
- if (ret < 0) {
- dev_err(&client->dev, "Unable to register iio device\n");
- goto err_buffer_cleanup;
- }
-
- ret = pm_runtime_set_active(&client->dev);
- if (ret)
- goto err_iio_unregister;
-
- pm_runtime_enable(&client->dev);
- pm_runtime_set_autosuspend_delay(&client->dev,
- BMC150_AUTO_SUSPEND_DELAY_MS);
- pm_runtime_use_autosuspend(&client->dev);
-
- return 0;
-
-err_iio_unregister:
- iio_device_unregister(indio_dev);
-err_buffer_cleanup:
- if (indio_dev->pollfunc)
- iio_triggered_buffer_cleanup(indio_dev);
-err_trigger_unregister:
- bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
-
- return ret;
-}
-
-static int bmc150_accel_remove(struct i2c_client *client)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
- pm_runtime_put_noidle(&client->dev);
-
- iio_device_unregister(indio_dev);
-
- bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
-
- mutex_lock(&data->mutex);
- bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int bmc150_accel_suspend(struct device *dev)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- mutex_lock(&data->mutex);
- bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0);
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-
-static int bmc150_accel_resume(struct device *dev)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct bmc150_accel_data *data = iio_priv(indio_dev);
-
- mutex_lock(&data->mutex);
- if (atomic_read(&data->active_intr))
- bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
- bmc150_accel_fifo_set_mode(data);
- mutex_unlock(&data->mutex);
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-static int bmc150_accel_runtime_suspend(struct device *dev)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret;
-
- dev_dbg(&data->client->dev, __func__);
- ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0);
- if (ret < 0)
- return -EAGAIN;
-
- return 0;
-}
-
-static int bmc150_accel_runtime_resume(struct device *dev)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
- struct bmc150_accel_data *data = iio_priv(indio_dev);
- int ret;
- int sleep_val;
-
- dev_dbg(&data->client->dev, __func__);
-
- ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
- if (ret < 0)
- return ret;
- ret = bmc150_accel_fifo_set_mode(data);
- if (ret < 0)
- return ret;
-
- sleep_val = bmc150_accel_get_startup_times(data);
- if (sleep_val < 20)
- usleep_range(sleep_val * 1000, 20000);
- else
- msleep_interruptible(sleep_val);
-
- return 0;
-}
-#endif
-
-static const struct dev_pm_ops bmc150_accel_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume)
- SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend,
- bmc150_accel_runtime_resume, NULL)
-};
-
-static const struct acpi_device_id bmc150_accel_acpi_match[] = {
- {"BSBA0150", bmc150},
- {"BMC150A", bmc150},
- {"BMI055A", bmi055},
- {"BMA0255", bma255},
- {"BMA250E", bma250e},
- {"BMA222E", bma222e},
- {"BMA0280", bma280},
- { },
-};
-MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
-
-static const struct i2c_device_id bmc150_accel_id[] = {
- {"bmc150_accel", bmc150},
- {"bmi055_accel", bmi055},
- {"bma255", bma255},
- {"bma250e", bma250e},
- {"bma222e", bma222e},
- {"bma280", bma280},
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
-
-static struct i2c_driver bmc150_accel_driver = {
- .driver = {
- .name = BMC150_ACCEL_DRV_NAME,
- .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
- .pm = &bmc150_accel_pm_ops,
- },
- .probe = bmc150_accel_probe,
- .remove = bmc150_accel_remove,
- .id_table = bmc150_accel_id,
-};
-module_i2c_driver(bmc150_accel_driver);
-
-MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("BMC150 accelerometer driver");
Code Review / kvmfornfv.git / blobdiff