| /* |
| * STMicroelectronics pressures driver |
| * |
| * Copyright 2013 STMicroelectronics Inc. |
| * |
| * Denis Ciocca <denis.ciocca@st.com> |
| * |
| * Licensed under the GPL-2. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/mutex.h> |
| #include <linux/interrupt.h> |
| #include <linux/i2c.h> |
| #include <linux/gpio.h> |
| #include <linux/irq.h> |
| #include <linux/delay.h> |
| #include <linux/iio/iio.h> |
| #include <linux/iio/sysfs.h> |
| #include <linux/iio/trigger.h> |
| #include <linux/iio/buffer.h> |
| #include <asm/unaligned.h> |
| |
| #include <linux/iio/common/st_sensors.h> |
| #include "st_pressure.h" |
| |
| #define ST_PRESS_LSB_PER_MBAR 4096UL |
| #define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \ |
| ST_PRESS_LSB_PER_MBAR) |
| #define ST_PRESS_LSB_PER_CELSIUS 480UL |
| #define ST_PRESS_CELSIUS_NANO_SCALE (1000000000UL / \ |
| ST_PRESS_LSB_PER_CELSIUS) |
| #define ST_PRESS_NUMBER_DATA_CHANNELS 1 |
| |
| /* FULLSCALE */ |
| #define ST_PRESS_FS_AVL_1260MB 1260 |
| |
| #define ST_PRESS_1_OUT_XL_ADDR 0x28 |
| #define ST_TEMP_1_OUT_L_ADDR 0x2b |
| |
| /* CUSTOM VALUES FOR LPS331AP SENSOR */ |
| #define ST_PRESS_LPS331AP_WAI_EXP 0xbb |
| #define ST_PRESS_LPS331AP_ODR_ADDR 0x20 |
| #define ST_PRESS_LPS331AP_ODR_MASK 0x70 |
| #define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL 0x01 |
| #define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL 0x05 |
| #define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL 0x06 |
| #define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL 0x07 |
| #define ST_PRESS_LPS331AP_PW_ADDR 0x20 |
| #define ST_PRESS_LPS331AP_PW_MASK 0x80 |
| #define ST_PRESS_LPS331AP_FS_ADDR 0x23 |
| #define ST_PRESS_LPS331AP_FS_MASK 0x30 |
| #define ST_PRESS_LPS331AP_FS_AVL_1260_VAL 0x00 |
| #define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE |
| #define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE |
| #define ST_PRESS_LPS331AP_BDU_ADDR 0x20 |
| #define ST_PRESS_LPS331AP_BDU_MASK 0x04 |
| #define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22 |
| #define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04 |
| #define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20 |
| #define ST_PRESS_LPS331AP_IHL_IRQ_ADDR 0x22 |
| #define ST_PRESS_LPS331AP_IHL_IRQ_MASK 0x80 |
| #define ST_PRESS_LPS331AP_OD_IRQ_ADDR 0x22 |
| #define ST_PRESS_LPS331AP_OD_IRQ_MASK 0x40 |
| #define ST_PRESS_LPS331AP_MULTIREAD_BIT true |
| #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500 |
| |
| /* CUSTOM VALUES FOR LPS001WP SENSOR */ |
| #define ST_PRESS_LPS001WP_WAI_EXP 0xba |
| #define ST_PRESS_LPS001WP_ODR_ADDR 0x20 |
| #define ST_PRESS_LPS001WP_ODR_MASK 0x30 |
| #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01 |
| #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02 |
| #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03 |
| #define ST_PRESS_LPS001WP_PW_ADDR 0x20 |
| #define ST_PRESS_LPS001WP_PW_MASK 0x40 |
| #define ST_PRESS_LPS001WP_BDU_ADDR 0x20 |
| #define ST_PRESS_LPS001WP_BDU_MASK 0x04 |
| #define ST_PRESS_LPS001WP_MULTIREAD_BIT true |
| #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28 |
| #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a |
| |
| /* CUSTOM VALUES FOR LPS25H SENSOR */ |
| #define ST_PRESS_LPS25H_WAI_EXP 0xbd |
| #define ST_PRESS_LPS25H_ODR_ADDR 0x20 |
| #define ST_PRESS_LPS25H_ODR_MASK 0x70 |
| #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01 |
| #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02 |
| #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03 |
| #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04 |
| #define ST_PRESS_LPS25H_PW_ADDR 0x20 |
| #define ST_PRESS_LPS25H_PW_MASK 0x80 |
| #define ST_PRESS_LPS25H_FS_ADDR 0x00 |
| #define ST_PRESS_LPS25H_FS_MASK 0x00 |
| #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00 |
| #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE |
| #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE |
| #define ST_PRESS_LPS25H_BDU_ADDR 0x20 |
| #define ST_PRESS_LPS25H_BDU_MASK 0x04 |
| #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23 |
| #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01 |
| #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10 |
| #define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22 |
| #define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80 |
| #define ST_PRESS_LPS25H_OD_IRQ_ADDR 0x22 |
| #define ST_PRESS_LPS25H_OD_IRQ_MASK 0x40 |
| #define ST_PRESS_LPS25H_MULTIREAD_BIT true |
| #define ST_PRESS_LPS25H_TEMP_OFFSET 42500 |
| #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28 |
| #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b |
| |
| static const struct iio_chan_spec st_press_1_channels[] = { |
| { |
| .type = IIO_PRESSURE, |
| .channel2 = IIO_NO_MOD, |
| .address = ST_PRESS_1_OUT_XL_ADDR, |
| .scan_index = ST_SENSORS_SCAN_X, |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 24, |
| .storagebits = 24, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), |
| .modified = 0, |
| }, |
| { |
| .type = IIO_TEMP, |
| .channel2 = IIO_NO_MOD, |
| .address = ST_TEMP_1_OUT_L_ADDR, |
| .scan_index = -1, |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE) | |
| BIT(IIO_CHAN_INFO_OFFSET), |
| .modified = 0, |
| }, |
| IIO_CHAN_SOFT_TIMESTAMP(1) |
| }; |
| |
| static const struct iio_chan_spec st_press_lps001wp_channels[] = { |
| { |
| .type = IIO_PRESSURE, |
| .channel2 = IIO_NO_MOD, |
| .address = ST_PRESS_LPS001WP_OUT_L_ADDR, |
| .scan_index = ST_SENSORS_SCAN_X, |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
| .modified = 0, |
| }, |
| { |
| .type = IIO_TEMP, |
| .channel2 = IIO_NO_MOD, |
| .address = ST_TEMP_LPS001WP_OUT_L_ADDR, |
| .scan_index = -1, |
| .scan_type = { |
| .sign = 'u', |
| .realbits = 16, |
| .storagebits = 16, |
| .endianness = IIO_LE, |
| }, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_OFFSET), |
| .modified = 0, |
| }, |
| IIO_CHAN_SOFT_TIMESTAMP(1) |
| }; |
| |
| static const struct st_sensor_settings st_press_sensors_settings[] = { |
| { |
| .wai = ST_PRESS_LPS331AP_WAI_EXP, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS331AP_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_1_channels, |
| .num_ch = ARRAY_SIZE(st_press_1_channels), |
| .odr = { |
| .addr = ST_PRESS_LPS331AP_ODR_ADDR, |
| .mask = ST_PRESS_LPS331AP_ODR_MASK, |
| .odr_avl = { |
| { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, }, |
| { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, }, |
| { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, }, |
| { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, }, |
| }, |
| }, |
| .pw = { |
| .addr = ST_PRESS_LPS331AP_PW_ADDR, |
| .mask = ST_PRESS_LPS331AP_PW_MASK, |
| .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .addr = ST_PRESS_LPS331AP_FS_ADDR, |
| .mask = ST_PRESS_LPS331AP_FS_MASK, |
| .fs_avl = { |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1260MB, |
| .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL, |
| .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN, |
| .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = ST_PRESS_LPS331AP_BDU_ADDR, |
| .mask = ST_PRESS_LPS331AP_BDU_MASK, |
| }, |
| .drdy_irq = { |
| .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR, |
| .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK, |
| .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK, |
| .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR, |
| .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK, |
| .addr_od = ST_PRESS_LPS331AP_OD_IRQ_ADDR, |
| .mask_od = ST_PRESS_LPS331AP_OD_IRQ_MASK, |
| .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR, |
| }, |
| .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT, |
| .bootime = 2, |
| }, |
| { |
| .wai = ST_PRESS_LPS001WP_WAI_EXP, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS001WP_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_lps001wp_channels, |
| .num_ch = ARRAY_SIZE(st_press_lps001wp_channels), |
| .odr = { |
| .addr = ST_PRESS_LPS001WP_ODR_ADDR, |
| .mask = ST_PRESS_LPS001WP_ODR_MASK, |
| .odr_avl = { |
| { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, }, |
| { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, }, |
| { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, }, |
| }, |
| }, |
| .pw = { |
| .addr = ST_PRESS_LPS001WP_PW_ADDR, |
| .mask = ST_PRESS_LPS001WP_PW_MASK, |
| .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .addr = 0, |
| }, |
| .bdu = { |
| .addr = ST_PRESS_LPS001WP_BDU_ADDR, |
| .mask = ST_PRESS_LPS001WP_BDU_MASK, |
| }, |
| .drdy_irq = { |
| .addr = 0, |
| }, |
| .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT, |
| .bootime = 2, |
| }, |
| { |
| .wai = ST_PRESS_LPS25H_WAI_EXP, |
| .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, |
| .sensors_supported = { |
| [0] = LPS25H_PRESS_DEV_NAME, |
| }, |
| .ch = (struct iio_chan_spec *)st_press_1_channels, |
| .num_ch = ARRAY_SIZE(st_press_1_channels), |
| .odr = { |
| .addr = ST_PRESS_LPS25H_ODR_ADDR, |
| .mask = ST_PRESS_LPS25H_ODR_MASK, |
| .odr_avl = { |
| { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, }, |
| { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, }, |
| { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, }, |
| { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, }, |
| }, |
| }, |
| .pw = { |
| .addr = ST_PRESS_LPS25H_PW_ADDR, |
| .mask = ST_PRESS_LPS25H_PW_MASK, |
| .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE, |
| .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, |
| }, |
| .fs = { |
| .addr = ST_PRESS_LPS25H_FS_ADDR, |
| .mask = ST_PRESS_LPS25H_FS_MASK, |
| .fs_avl = { |
| [0] = { |
| .num = ST_PRESS_FS_AVL_1260MB, |
| .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL, |
| .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN, |
| .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN, |
| }, |
| }, |
| }, |
| .bdu = { |
| .addr = ST_PRESS_LPS25H_BDU_ADDR, |
| .mask = ST_PRESS_LPS25H_BDU_MASK, |
| }, |
| .drdy_irq = { |
| .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR, |
| .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK, |
| .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK, |
| .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR, |
| .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK, |
| .addr_od = ST_PRESS_LPS25H_OD_IRQ_ADDR, |
| .mask_od = ST_PRESS_LPS25H_OD_IRQ_MASK, |
| .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR, |
| }, |
| .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT, |
| .bootime = 2, |
| }, |
| }; |
| |
| static int st_press_write_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *ch, |
| int val, |
| int val2, |
| long mask) |
| { |
| int err; |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| if (val2) |
| return -EINVAL; |
| mutex_lock(&indio_dev->mlock); |
| err = st_sensors_set_odr(indio_dev, val); |
| mutex_unlock(&indio_dev->mlock); |
| return err; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int st_press_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *ch, int *val, |
| int *val2, long mask) |
| { |
| int err; |
| struct st_sensor_data *press_data = iio_priv(indio_dev); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_RAW: |
| err = st_sensors_read_info_raw(indio_dev, ch, val); |
| if (err < 0) |
| goto read_error; |
| |
| return IIO_VAL_INT; |
| case IIO_CHAN_INFO_SCALE: |
| *val = 0; |
| |
| switch (ch->type) { |
| case IIO_PRESSURE: |
| *val2 = press_data->current_fullscale->gain; |
| break; |
| case IIO_TEMP: |
| *val2 = press_data->current_fullscale->gain2; |
| break; |
| default: |
| err = -EINVAL; |
| goto read_error; |
| } |
| |
| return IIO_VAL_INT_PLUS_NANO; |
| case IIO_CHAN_INFO_OFFSET: |
| switch (ch->type) { |
| case IIO_TEMP: |
| *val = 425; |
| *val2 = 10; |
| break; |
| default: |
| err = -EINVAL; |
| goto read_error; |
| } |
| |
| return IIO_VAL_FRACTIONAL; |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| *val = press_data->odr; |
| return IIO_VAL_INT; |
| default: |
| return -EINVAL; |
| } |
| |
| read_error: |
| return err; |
| } |
| |
| static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); |
| |
| static struct attribute *st_press_attributes[] = { |
| &iio_dev_attr_sampling_frequency_available.dev_attr.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group st_press_attribute_group = { |
| .attrs = st_press_attributes, |
| }; |
| |
| static const struct iio_info press_info = { |
| .driver_module = THIS_MODULE, |
| .attrs = &st_press_attribute_group, |
| .read_raw = &st_press_read_raw, |
| .write_raw = &st_press_write_raw, |
| .debugfs_reg_access = &st_sensors_debugfs_reg_access, |
| }; |
| |
| #ifdef CONFIG_IIO_TRIGGER |
| static const struct iio_trigger_ops st_press_trigger_ops = { |
| .owner = THIS_MODULE, |
| .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE, |
| }; |
| #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops) |
| #else |
| #define ST_PRESS_TRIGGER_OPS NULL |
| #endif |
| |
| int st_press_common_probe(struct iio_dev *indio_dev) |
| { |
| struct st_sensor_data *press_data = iio_priv(indio_dev); |
| int irq = press_data->get_irq_data_ready(indio_dev); |
| int err; |
| |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| indio_dev->info = &press_info; |
| mutex_init(&press_data->tb.buf_lock); |
| |
| st_sensors_power_enable(indio_dev); |
| |
| err = st_sensors_check_device_support(indio_dev, |
| ARRAY_SIZE(st_press_sensors_settings), |
| st_press_sensors_settings); |
| if (err < 0) |
| return err; |
| |
| press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS; |
| press_data->multiread_bit = press_data->sensor_settings->multi_read_bit; |
| indio_dev->channels = press_data->sensor_settings->ch; |
| indio_dev->num_channels = press_data->sensor_settings->num_ch; |
| |
| if (press_data->sensor_settings->fs.addr != 0) |
| press_data->current_fullscale = |
| (struct st_sensor_fullscale_avl *) |
| &press_data->sensor_settings->fs.fs_avl[0]; |
| |
| press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz; |
| |
| /* Some devices don't support a data ready pin. */ |
| if (!press_data->dev->platform_data && |
| press_data->sensor_settings->drdy_irq.addr) |
| press_data->dev->platform_data = |
| (struct st_sensors_platform_data *)&default_press_pdata; |
| |
| err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data); |
| if (err < 0) |
| return err; |
| |
| err = st_press_allocate_ring(indio_dev); |
| if (err < 0) |
| return err; |
| |
| if (irq > 0) { |
| err = st_sensors_allocate_trigger(indio_dev, |
| ST_PRESS_TRIGGER_OPS); |
| if (err < 0) |
| goto st_press_probe_trigger_error; |
| } |
| |
| err = iio_device_register(indio_dev); |
| if (err) |
| goto st_press_device_register_error; |
| |
| dev_info(&indio_dev->dev, "registered pressure sensor %s\n", |
| indio_dev->name); |
| |
| return err; |
| |
| st_press_device_register_error: |
| if (irq > 0) |
| st_sensors_deallocate_trigger(indio_dev); |
| st_press_probe_trigger_error: |
| st_press_deallocate_ring(indio_dev); |
| |
| return err; |
| } |
| EXPORT_SYMBOL(st_press_common_probe); |
| |
| void st_press_common_remove(struct iio_dev *indio_dev) |
| { |
| struct st_sensor_data *press_data = iio_priv(indio_dev); |
| |
| st_sensors_power_disable(indio_dev); |
| |
| iio_device_unregister(indio_dev); |
| if (press_data->get_irq_data_ready(indio_dev) > 0) |
| st_sensors_deallocate_trigger(indio_dev); |
| |
| st_press_deallocate_ring(indio_dev); |
| } |
| EXPORT_SYMBOL(st_press_common_remove); |
| |
| MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); |
| MODULE_DESCRIPTION("STMicroelectronics pressures driver"); |
| MODULE_LICENSE("GPL v2"); |