nathan/Chromebook-Device-Nyan-NVIDIA-Tegra-K1-T124-Upstream-Linux-3.10-LTS-Kernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Initial commit; kernel source import

Browse Source
This commit is contained in:
Nathan
2025-04-06 23:50:55 -05:00
commit 25c6d769f4
45093 changed files with 18199410 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
drivers/iio/accel/Kconfig Normal file
View File

@@ -0,0 +1,64 @@
#
# Accelerometer drivers
#
menu "Accelerometers"
config CROS_EC_ACCEL
tristate "ChromeOS EC Accelerometer"
depends on SYSFS && MFD_CROS_EC
select IIO_BUFFER
help
Say yes here to build support for ChromeOS EC Accelerometer.
This driver is used to access an accelerometer attached to the
ChromeOS Embedded Controller.
config HID_SENSOR_ACCEL_3D
depends on HID_SENSOR_HUB
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
select HID_SENSOR_IIO_COMMON
select HID_SENSOR_IIO_TRIGGER
tristate "HID Accelerometers 3D"
help
Say yes here to build support for the HID SENSOR
accelerometers 3D.
config KXSD9
tristate "Kionix KXSD9 Accelerometer Driver"
depends on SPI
help
Say yes here to build support for the Kionix KXSD9 accelerometer.
Currently this only supports the device via an SPI interface.
config IIO_ST_ACCEL_3AXIS
tristate "STMicroelectronics accelerometers 3-Axis Driver"
depends on (I2C || SPI_MASTER) && SYSFS
select IIO_ST_SENSORS_CORE
select IIO_ST_ACCEL_I2C_3AXIS if (I2C)
select IIO_ST_ACCEL_SPI_3AXIS if (SPI_MASTER)
select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
select IIO_ST_ACCEL_BUFFER if (IIO_TRIGGERED_BUFFER)
help
Say yes here to build support for STMicroelectronics accelerometers:
LSM303DLH, LSM303DLHC, LIS3DH, LSM330D, LSM330DL, LSM330DLC,
LIS331DLH, LSM303DL, LSM303DLM, LSM330.
This driver can also be built as a module. If so, will be created
these modules:
- st_accel (core functions for the driver [it is mandatory]);
- st_accel_i2c (necessary for the I2C devices [optional*]);
- st_accel_spi (necessary for the SPI devices [optional*]);
(*) one of these is necessary to do something.
config IIO_ST_ACCEL_I2C_3AXIS
tristate
depends on IIO_ST_ACCEL_3AXIS
depends on IIO_ST_SENSORS_I2C
config IIO_ST_ACCEL_SPI_3AXIS
tristate
depends on IIO_ST_ACCEL_3AXIS
depends on IIO_ST_SENSORS_SPI
endmenu

16
drivers/iio/accel/Makefile Normal file
View File

@@ -0,0 +1,16 @@
#
# Makefile for industrial I/O accelerometer drivers
#
obj-$(CONFIG_CROS_EC_ACCEL) += cros_ec_accel.o
obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o
st_accel-y := st_accel_core.o
st_accel-$(CONFIG_IIO_BUFFER) += st_accel_buffer.o
obj-$(CONFIG_IIO_ST_ACCEL_I2C_3AXIS) += st_accel_i2c.o
obj-$(CONFIG_IIO_ST_ACCEL_SPI_3AXIS) += st_accel_spi.o
obj-$(CONFIG_KXSD9) += kxsd9.o

724
drivers/iio/accel/cros_ec_accel.c Normal file
View File

@@ -0,0 +1,724 @@
/*
* cros_ec_accel - Driver for Chrome OS Embedded Controller accelerometer
*
* Copyright (C) 2014 Google, Inc
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that 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.
*
* This driver uses the cros-ec interface to communicate with the Chrome OS
* EC about accelerometer data. Accelerometer access is presented through
* iio sysfs.
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/iio/buffer.h>
#include <linux/iio/iio.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
/* Indices for EC sensor values. */
enum sensor_index {
ACC_BASE_X,
ACC_BASE_Y,
ACC_BASE_Z,
ACC_LID_X,
ACC_LID_Y,
ACC_LID_Z,
LID_ANGLE,
NUM_EC_INPUTS
};
/* Register addresses for EC accelerometer data. */
static const unsigned int ec_regs[NUM_EC_INPUTS] = {
[ACC_BASE_X] = (EC_MEMMAP_ACC_DATA+2),
[ACC_BASE_Y] = (EC_MEMMAP_ACC_DATA+4),
[ACC_BASE_Z] = (EC_MEMMAP_ACC_DATA+6),
[ACC_LID_X] = (EC_MEMMAP_ACC_DATA+8),
[ACC_LID_Y] = (EC_MEMMAP_ACC_DATA+10),
[ACC_LID_Z] = (EC_MEMMAP_ACC_DATA+12),
[LID_ANGLE] = (EC_MEMMAP_ACC_DATA)
};
/* ADC counts per 1G. */
#define ACCEL_G 1024
enum accel_data_format {
RAW,
CALIBRATED,
};
/*
* Scalar to use for the calibration scale. Typically the calibration
* scale is a float near 1.0, but to avoid floating point, we will multiply
* the calibration scale by this scalar. Using a power of 2 is more efficient.
*/
#define CALIB_SCALE_SCALAR 1024
#define EC_ACCEL_CHAN_COMMON \
.type = IIO_ACCEL, \
.modified = 1, \
.info_mask_separate = \
BIT(IIO_CHAN_INFO_RAW) | \
BIT(IIO_CHAN_INFO_PROCESSED) | \
BIT(IIO_CHAN_INFO_CALIBSCALE) | \
BIT(IIO_CHAN_INFO_CALIBBIAS), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
BIT(IIO_CHAN_INFO_PEAK_SCALE) | \
BIT(IIO_CHAN_INFO_FREQUENCY) | \
BIT(IIO_CHAN_INFO_SAMP_FREQ), \
.scan_type = { \
.sign = 's', \
.realbits = 16, \
.storagebits = 16, \
.shift = 0, \
} \
static const struct iio_chan_spec ec_accel_channels[] = {
{
EC_ACCEL_CHAN_COMMON,
.extend_name = "base",
.channel2 = IIO_MOD_X,
.scan_index = ACC_BASE_X,
},
{
EC_ACCEL_CHAN_COMMON,
.extend_name = "base",
.channel2 = IIO_MOD_Y,
.scan_index = ACC_BASE_Y,
},
{
EC_ACCEL_CHAN_COMMON,
.extend_name = "base",
.channel2 = IIO_MOD_Z,
.scan_index = ACC_BASE_Z,
},
{
EC_ACCEL_CHAN_COMMON,
.extend_name = "lid",
.channel2 = IIO_MOD_X,
.scan_index = ACC_LID_X,
},
{
EC_ACCEL_CHAN_COMMON,
.extend_name = "lid",
.channel2 = IIO_MOD_Y,
.scan_index = ACC_LID_Y,
},
{
EC_ACCEL_CHAN_COMMON,
.extend_name = "lid",
.channel2 = IIO_MOD_Z,
.scan_index = ACC_LID_Z,
},
{
.type = IIO_ANGL,
.channel = 0,
.info_mask_separate =
BIT(IIO_CHAN_INFO_PROCESSED) |
BIT(IIO_CHAN_INFO_OFFSET),
.address = LID_ANGLE,
.scan_index = LID_ANGLE,
.scan_type = {
.sign = 's',
.realbits = 9,
.storagebits = 16,
.shift = 0,
},
},
IIO_CHAN_SOFT_TIMESTAMP(NUM_EC_INPUTS)
};
/* State data for ec_accel iio driver. */
struct cros_ec_accel_state {
struct cros_ec_device *ec;
/*
* Static array to hold data from a single capture. For each
* channel we need 2 bytes, except for the timestamp. The timestamp
* is always last and is always 8-byte aligned.
*/
union {
u16 samples[NUM_EC_INPUTS];
u64 ts[DIV_ROUND_UP(ARRAY_SIZE(ec_accel_channels),
sizeof(u64)/sizeof(u16)) + 1];
} capture_data;
/*
* Calibration parameters. Note that trigger captured data will always
* provide the calibrated values.
*/
int calib_scale[NUM_EC_INPUTS];
int calib_offset[NUM_EC_INPUTS];
};
/**
* host_cmd_sensor_num - convert sensor index into host command sensor number.
*
* @idx sensor index (should be element of enum sensor_index)
* @return host command sensor number
*/
static inline int host_cmd_sensor_num(int idx)
{
return idx <= ACC_BASE_Z ?
EC_MOTION_SENSOR_ACCEL_BASE : EC_MOTION_SENSOR_ACCEL_LID;
}
/**
* apply_calibration - apply calibration to raw data from a sensor
*
* @st Pointer to state information for device.
* @data Raw data to convert.
* @sensor_id The sensor id that the data belongs to.
* @return calibrated value
*
* The processed value can be calculated as:
* processed = (raw * calib_scale/CALIB_SCALE_SCALAR) + calib_offset.
*/
static inline s16 apply_calibration(struct cros_ec_accel_state *st,
s16 data, int sensor_id)
{
return (data * st->calib_scale[sensor_id] / CALIB_SCALE_SCALAR) +
st->calib_offset[sensor_id];
}
/**
* read_ec_until_not_busy - read from EC status byte until it reads not busy.
*
* @st Pointer to state information for device.
* @return 8-bit status if ok, -ve on error
*/
static int read_ec_until_not_busy(struct cros_ec_accel_state *st)
{
struct cros_ec_device *ec = st->ec;
u8 status;
int attempts = 0;
ec->cmd_read_u8(st->ec, EC_MEMMAP_ACC_STATUS, &status);
while (status & EC_MEMMAP_ACC_STATUS_BUSY_BIT) {
/* Give up after enough attempts, return error. */
if (attempts++ >= 50)
return -EIO;
/* Small delay every so often. */
if (attempts % 5 == 0)
msleep(25);
ec->cmd_read_u8(st->ec, EC_MEMMAP_ACC_STATUS, &status);
}
return status;
}
/**
* read_ec_accel_data_unsafe - read acceleration data from EC shared memory.
*
* @st Pointer to state information for device.
* @scan_mask Bitmap of the sensor indices to scan.
* @data Location to store data.
* @ret_format Return data format (RAW or CALIBRATED)
*
* Note this is the unsafe function for reading the EC data. It does not
* guarantee that the EC will not modify the data as it is being read in.
*/
static void read_ec_accel_data_unsafe(struct cros_ec_accel_state *st,
long unsigned int scan_mask, u16 *data,
enum accel_data_format ret_format)
{
struct cros_ec_device *ec = st->ec;
int i = 0;
int num_enabled = bitmap_weight(&scan_mask, NUM_EC_INPUTS);
/*
* Read all sensors enabled in scan_mask. Each value is 2
* bytes.
*/
while (num_enabled--) {
i = find_next_bit(&scan_mask, NUM_EC_INPUTS, i);
ec->cmd_read_u16(st->ec, ec_regs[i], data);
/* Calibrate the data if desired. */
if (ret_format == CALIBRATED)
*data = apply_calibration(st, (s16)*data, i);
i++;
data++;
}
}
/**
* read_ec_accel_data - read acceleration data from EC shared memory.
*
* @st Pointer to state information for device.
* @scan_mask Bitmap of the sensor indices to scan.
* @data Location to store data.
* @ret_format Return data format (RAW or CALIBRATED)
* @return 0 if ok, -ve on error
*
* Note: this is the safe function for reading the EC data. It guarantees
* that the data sampled was not modified by the EC while being read.
*/
static int read_ec_accel_data(struct cros_ec_accel_state *st,
long unsigned int scan_mask, u16 *data,
enum accel_data_format ret_format)
{
struct cros_ec_device *ec = st->ec;
u8 samp_id = 0xff, status = 0;
int attempts = 0;
/*
* Continually read all data from EC until the status byte after
* all reads reflects that the EC is not busy and the sample id
* matches the sample id from before all reads. This guarantees
* that data read in was not modified by the EC while reading.
*/
while ((status & (EC_MEMMAP_ACC_STATUS_BUSY_BIT |
EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK)) != samp_id) {
/* If we have tried to read too many times, return error. */
if (attempts++ >= 5)
return -EIO;
/* Read status byte until EC is not busy. */
status = read_ec_until_not_busy(st);
if (status < 0)
return status;
/*
* Store the current sample id so that we can compare to the
* sample id after reading the data.
*/
samp_id = status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
/* Read all EC data, format it, and store it into data. */
read_ec_accel_data_unsafe(st, scan_mask, data, ret_format);
/* Read status byte. */
ec->cmd_read_u8(st->ec, EC_MEMMAP_ACC_STATUS, &status);
}
return 0;
}
/**
* send_motion_host_cmd - send motion sense host command
*
* @st Pointer to state information for device.
* @param Pointer to motion sense host command parameter struct.
* @resp Pointer to motion sense host command response struct.
* @return 0 if ok, -ve on error.
*
* Note, when called, the sub-command is assumed to be set in param->cmd.
*/
static int send_motion_host_cmd(struct cros_ec_accel_state *st,
struct ec_params_motion_sense *param,
struct ec_response_motion_sense *resp)
{
struct cros_ec_command msg;
/* Set up the host command structure. */
msg.version = 1;
msg.command = EC_CMD_MOTION_SENSE_CMD;
msg.outdata = (uint8_t *)param;
msg.outsize = sizeof(struct ec_params_motion_sense);
msg.indata = (uint8_t *)resp;
msg.insize = sizeof(struct ec_response_motion_sense);
/* Send host command. */
if (cros_ec_cmd_xfer(st->ec, &msg) > 0)
return 0;
else
return -EIO;
}
static int ec_accel_read(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
{
struct cros_ec_accel_state *st = iio_priv(indio_dev);
struct ec_params_motion_sense param;
struct ec_response_motion_sense resp;
u16 data = 0;
int ret = IIO_VAL_INT;
switch (mask) {
case IIO_CHAN_INFO_RAW:
if (read_ec_accel_data(st, (1 << chan->scan_index),
&data, RAW) < 0)
ret = -EIO;
*val = (s16)data;
break;
case IIO_CHAN_INFO_PROCESSED:
if (read_ec_accel_data(st, (1 << chan->scan_index),
&data, CALIBRATED) < 0)
ret = -EIO;
*val = (s16)data;
break;
case IIO_CHAN_INFO_SCALE:
*val = ACCEL_G;
break;
case IIO_CHAN_INFO_CALIBSCALE:
*val = st->calib_scale[chan->scan_index];
break;
case IIO_CHAN_INFO_CALIBBIAS:
*val = st->calib_offset[chan->scan_index];
break;
case IIO_CHAN_INFO_OFFSET:
/* Only lid angle supports offset field. */
if (chan->scan_index != LID_ANGLE)
return -EIO;
param.cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
param.kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
if (send_motion_host_cmd(st, &param, &resp))
return -EIO;
else
*val = resp.kb_wake_angle.ret;
break;
case IIO_CHAN_INFO_SAMP_FREQ:
param.cmd = MOTIONSENSE_CMD_EC_RATE;
param.ec_rate.data = EC_MOTION_SENSE_NO_VALUE;
if (send_motion_host_cmd(st, &param, &resp))
return -EIO;
else
*val = resp.ec_rate.ret;
break;
case IIO_CHAN_INFO_PEAK_SCALE:
param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
param.sensor_range.sensor_num =
host_cmd_sensor_num(chan->scan_index);
if (send_motion_host_cmd(st, &param, &resp))
return -EIO;
else
*val = resp.sensor_range.ret;
break;
case IIO_CHAN_INFO_FREQUENCY:
param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
param.sensor_odr.data = EC_MOTION_SENSE_NO_VALUE;
param.sensor_range.sensor_num =
host_cmd_sensor_num(chan->scan_index);
if (send_motion_host_cmd(st, &param, &resp))
ret = -EIO;
else
*val = resp.sensor_odr.ret;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int ec_accel_write(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val, int val2, long mask)
{
struct cros_ec_accel_state *st = iio_priv(indio_dev);
struct ec_params_motion_sense param;
struct ec_response_motion_sense resp;
int ret = 0;
switch (mask) {
case IIO_CHAN_INFO_CALIBSCALE:
st->calib_scale[chan->scan_index] = val;
break;
case IIO_CHAN_INFO_CALIBBIAS:
st->calib_offset[chan->scan_index] = val;
break;
case IIO_CHAN_INFO_OFFSET:
/* Only lid angle supports offset field. */
if (chan->scan_index != LID_ANGLE)
return -EIO;
param.cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
param.kb_wake_angle.data = val;
if (send_motion_host_cmd(st, &param, &resp))
return -EIO;
break;
case IIO_CHAN_INFO_SAMP_FREQ:
param.cmd = MOTIONSENSE_CMD_EC_RATE;
param.ec_rate.data = val;
if (send_motion_host_cmd(st, &param, &resp))
return -EIO;
break;
case IIO_CHAN_INFO_PEAK_SCALE:
param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
param.sensor_range.data = val;
param.sensor_range.sensor_num =
host_cmd_sensor_num(chan->scan_index);
/* Always roundup, so caller gets at least what it asks for. */
param.sensor_range.roundup = 1;
if (send_motion_host_cmd(st, &param, &resp))
return -EIO;
break;
case IIO_CHAN_INFO_FREQUENCY:
param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
param.sensor_odr.data = val;
param.sensor_range.sensor_num =
host_cmd_sensor_num(chan->scan_index);
/* Always roundup, so caller gets at least what it asks for. */
param.sensor_odr.roundup = 1;
if (send_motion_host_cmd(st, &param, &resp))
ret = -EIO;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static const struct iio_info ec_accel_info = {
.read_raw = &ec_accel_read,
.write_raw = &ec_accel_write,
.driver_module = THIS_MODULE,
};
/**
* accel_capture - the trigger handler function
*
* @irq: the interrupt number
* @p: private data - always a pointer to the poll func.
*
* On a trigger event occurring, if the pollfunc is attached then this
* handler is called as a threaded interrupt (and hence may sleep). It
* is responsible for grabbing data from the device and pushing it into
* the associated buffer.
*/
static irqreturn_t accel_capture(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct cros_ec_accel_state *st = iio_priv(indio_dev);
/* Clear capture data. */
memset(st->capture_data.samples, 0, sizeof(st->capture_data));
/*
* Read data based on which channels are enabled in scan mask. Note
* that on a capture we are always reading the calibrated data.
*/
read_ec_accel_data(st, *(indio_dev->active_scan_mask),
st->capture_data.samples, CALIBRATED);
/* Store the timestamp last 8 bytes of data. */
if (indio_dev->scan_timestamp)
st->capture_data.ts[(indio_dev->scan_bytes - 1) / sizeof(s64)] =
iio_get_time_ns();
iio_push_to_buffers(indio_dev, (u8 *)st->capture_data.samples);
/*
* Tell the core we are done with this trigger and ready for the
* next one.
*/
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;
}
static const struct iio_buffer_setup_ops iio_simple_dummy_buffer_setup_ops = {
/* Generic function for equal sized ring elements + timestamp. */
.preenable = &iio_sw_buffer_preenable,
/* Generic function that attaches the pollfunc to the trigger. */
.postenable = &iio_triggered_buffer_postenable,
/* Generic function that detaches the pollfunc from the trigger. */
.predisable = &iio_triggered_buffer_predisable,
};
static int configure_buffer(struct iio_dev *indio_dev,
const struct iio_chan_spec *channels, const unsigned int num_channels)
{
int ret;
struct iio_buffer *buffer;
/* Allocate a buffer to use - here a kfifo. */
buffer = iio_kfifo_allocate(indio_dev);
if (buffer == NULL) {
ret = -ENOMEM;
goto error_ret;
}
/* Enable timestamps by default. */
buffer->scan_timestamp = true;
indio_dev->buffer = buffer;
indio_dev->setup_ops = &iio_simple_dummy_buffer_setup_ops;
indio_dev->pollfunc =
iio_alloc_pollfunc(NULL, &accel_capture, IRQF_ONESHOT,
indio_dev, "");
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_free_buffer;
}
/* This device uses buffered captures driven by trigger. */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
ret = iio_buffer_register(indio_dev, channels, num_channels);
if (ret)
goto error_dealloc_pollfunc;
return 0;
error_dealloc_pollfunc:
iio_dealloc_pollfunc(indio_dev->pollfunc);
error_free_buffer:
iio_kfifo_free(indio_dev->buffer);
error_ret:
return ret;
}
static int ec_accel_probe(struct platform_device *pdev)
{
struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
struct iio_dev *indio_dev;
struct cros_ec_accel_state *state;
int ret, i;
u8 status;
if (!ec) {
dev_warn(&pdev->dev, "No CROS EC device found.\n");
ret = -EINVAL;
goto error_ret;
}
/*
* Check if EC supports direct memory reads and if EC has
* accelerometers.
*/
if (!ec->cmd_read_u8 || !ec->cmd_read_u16) {
dev_info(&pdev->dev, "EC does not support direct reads.\n");
ret = -ENODEV;
goto error_ret;
}
ret = ec->cmd_read_u8(ec, EC_MEMMAP_ACC_STATUS, &status);
if (ret < 0) {
dev_info(&pdev->dev, "EC does not support direct reads.\n");
goto error_ret;
}
/* Check if EC has accelerometers. */
if (!(status & EC_MEMMAP_ACC_STATUS_PRESENCE_BIT)) {
dev_info(&pdev->dev, "EC does not have accelerometers.\n");
ret = -ENOENT;
goto error_ret;
}
indio_dev = iio_device_alloc(sizeof(*state));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
platform_set_drvdata(pdev, indio_dev);
state = iio_priv(indio_dev);
state->ec = ec;
/* Set nominal calibration offset and scale. */
for (i = 0; i < NUM_EC_INPUTS; i++) {
state->calib_offset[i] = 0;
state->calib_scale[i] = CALIB_SCALE_SCALAR;
}
indio_dev->channels = ec_accel_channels;
indio_dev->num_channels = ARRAY_SIZE(ec_accel_channels);
indio_dev->dev.parent = &pdev->dev;
indio_dev->info = &ec_accel_info;
indio_dev->name = "cros-ec-accel";
indio_dev->modes = INDIO_DIRECT_MODE;
/* Configure buffered capture support. */
ret = configure_buffer(indio_dev, ec_accel_channels,
ARRAY_SIZE(ec_accel_channels));
if (ret)
goto error_free_device;
ret = iio_device_register(indio_dev);
if (ret)
goto error_free_device;
return 0;
error_free_device:
iio_device_free(indio_dev);
error_ret:
return ret;
}
static int ec_accel_remove(struct platform_device *pdev)
{
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
iio_device_unregister(indio_dev);
/* Unconfigure and free buffer. */
iio_buffer_unregister(indio_dev);
iio_dealloc_pollfunc(indio_dev->pollfunc);
iio_kfifo_free(indio_dev->buffer);
iio_device_free(indio_dev);
return 0;
}
static const struct platform_device_id cros_ec_accel_ids[] = {
{
.name = "cros-ec-accel",
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, cros_ec_accel_ids);
static struct platform_driver cros_ec_accel_platform_driver = {
.driver = {
.name = "cros-ec-accel",
.owner = THIS_MODULE,
},
.probe = ec_accel_probe,
.remove = ec_accel_remove,
};
module_platform_driver(cros_ec_accel_platform_driver);
MODULE_DESCRIPTION("ChromeOS EC accelerometer driver");
MODULE_LICENSE("GPL");

404
drivers/iio/accel/hid-sensor-accel-3d.c Normal file
View File

@@ -0,0 +1,404 @@
/*
* HID Sensors Driver
* Copyright (c) 2012, 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/hid-sensor-hub.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"
/*Format: HID-SENSOR-usage_id_in_hex*/
/*Usage ID from spec for Accelerometer-3D: 0x200073*/
#define DRIVER_NAME "HID-SENSOR-200073"
enum accel_3d_channel {
CHANNEL_SCAN_INDEX_X,
CHANNEL_SCAN_INDEX_Y,
CHANNEL_SCAN_INDEX_Z,
ACCEL_3D_CHANNEL_MAX,
};
struct accel_3d_state {
struct hid_sensor_hub_callbacks callbacks;
struct hid_sensor_common common_attributes;
struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
u32 accel_val[ACCEL_3D_CHANNEL_MAX];
};
static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
HID_USAGE_SENSOR_ACCEL_X_AXIS,
HID_USAGE_SENSOR_ACCEL_Y_AXIS,
HID_USAGE_SENSOR_ACCEL_Z_AXIS
};
/* Channel definitions */
static const struct iio_chan_spec accel_3d_channels[] = {
{
.type = IIO_ACCEL,
.modified = 1,
.channel2 = IIO_MOD_X,
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = CHANNEL_SCAN_INDEX_X,
}, {
.type = IIO_ACCEL,
.modified = 1,
.channel2 = IIO_MOD_Y,
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = CHANNEL_SCAN_INDEX_Y,
}, {
.type = IIO_ACCEL,
.modified = 1,
.channel2 = IIO_MOD_Z,
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_HYSTERESIS),
.scan_index = CHANNEL_SCAN_INDEX_Z,
}
};
/* Adjust channel real bits based on report descriptor */
static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
int channel, int size)
{
channels[channel].scan_type.sign = 's';
/* Real storage bits will change based on the report desc. */
channels[channel].scan_type.realbits = size * 8;
/* Maximum size of a sample to capture is u32 */
channels[channel].scan_type.storagebits = sizeof(u32) * 8;
}
/* Channel read_raw handler */
static int accel_3d_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2,
long mask)
{
struct accel_3d_state *accel_state = iio_priv(indio_dev);
int report_id = -1;
u32 address;
int ret;
int ret_type;
*val = 0;
*val2 = 0;
switch (mask) {
case 0:
report_id = accel_state->accel[chan->scan_index].report_id;
address = accel_3d_addresses[chan->scan_index];
if (report_id >= 0)
*val = sensor_hub_input_attr_get_raw_value(
accel_state->common_attributes.hsdev,
HID_USAGE_SENSOR_ACCEL_3D, address,
report_id);
else {
*val = 0;
return -EINVAL;
}
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SCALE:
*val = accel_state->accel[CHANNEL_SCAN_INDEX_X].units;
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_OFFSET:
*val = hid_sensor_convert_exponent(
accel_state->accel[CHANNEL_SCAN_INDEX_X].unit_expo);
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SAMP_FREQ:
ret = hid_sensor_read_samp_freq_value(
&accel_state->common_attributes, val, val2);
ret_type = IIO_VAL_INT_PLUS_MICRO;
break;
case IIO_CHAN_INFO_HYSTERESIS:
ret = hid_sensor_read_raw_hyst_value(
&accel_state->common_attributes, val, val2);
ret_type = IIO_VAL_INT_PLUS_MICRO;
break;
default:
ret_type = -EINVAL;
break;
}
return ret_type;
}
/* Channel write_raw handler */
static int accel_3d_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val,
int val2,
long mask)
{
struct accel_3d_state *accel_state = iio_priv(indio_dev);
int ret = 0;
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
ret = hid_sensor_write_samp_freq_value(
&accel_state->common_attributes, val, val2);
break;
case IIO_CHAN_INFO_HYSTERESIS:
ret = hid_sensor_write_raw_hyst_value(
&accel_state->common_attributes, val, val2);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int accel_3d_write_raw_get_fmt(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
long mask)
{
return IIO_VAL_INT_PLUS_MICRO;
}
static const struct iio_info accel_3d_info = {
.driver_module = THIS_MODULE,
.read_raw = &accel_3d_read_raw,
.write_raw = &accel_3d_write_raw,
.write_raw_get_fmt = &accel_3d_write_raw_get_fmt,
};
/* Function to push data to buffer */
static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
{
dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
iio_push_to_buffers(indio_dev, (u8 *)data);
}
/* Callback handler to send event after all samples are received and captured */
static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
void *priv)
{
struct iio_dev *indio_dev = platform_get_drvdata(priv);
struct accel_3d_state *accel_state = iio_priv(indio_dev);
dev_dbg(&indio_dev->dev, "accel_3d_proc_event [%d]\n",
accel_state->common_attributes.data_ready);
if (accel_state->common_attributes.data_ready)
hid_sensor_push_data(indio_dev,
(u8 *)accel_state->accel_val,
sizeof(accel_state->accel_val));
return 0;
}
/* Capture samples in local storage */
static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
unsigned usage_id,
size_t raw_len, char *raw_data,
void *priv)
{
struct iio_dev *indio_dev = platform_get_drvdata(priv);
struct accel_3d_state *accel_state = iio_priv(indio_dev);
int offset;
int ret = -EINVAL;
switch (usage_id) {
case HID_USAGE_SENSOR_ACCEL_X_AXIS:
case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] =
*(u32 *)raw_data;
ret = 0;
break;
default:
break;
}
return ret;
}
/* Parse report which is specific to an usage id*/
static int accel_3d_parse_report(struct platform_device *pdev,
struct hid_sensor_hub_device *hsdev,
struct iio_chan_spec *channels,
unsigned usage_id,
struct accel_3d_state *st)
{
int ret;
int i;
for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
ret = sensor_hub_input_get_attribute_info(hsdev,
HID_INPUT_REPORT,
usage_id,
HID_USAGE_SENSOR_ACCEL_X_AXIS + i,
&st->accel[CHANNEL_SCAN_INDEX_X + i]);
if (ret < 0)
break;
accel_3d_adjust_channel_bit_mask(channels,
CHANNEL_SCAN_INDEX_X + i,
st->accel[CHANNEL_SCAN_INDEX_X + i].size);
}
dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
st->accel[0].index,
st->accel[0].report_id,
st->accel[1].index, st->accel[1].report_id,
st->accel[2].index, st->accel[2].report_id);
return ret;
}
/* Function to initialize the processing for usage id */
static int hid_accel_3d_probe(struct platform_device *pdev)
{
int ret = 0;
static const char *name = "accel_3d";
struct iio_dev *indio_dev;
struct accel_3d_state *accel_state;
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
struct iio_chan_spec *channels;
indio_dev = iio_device_alloc(sizeof(struct accel_3d_state));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
platform_set_drvdata(pdev, indio_dev);
accel_state = iio_priv(indio_dev);
accel_state->common_attributes.hsdev = hsdev;
accel_state->common_attributes.pdev = pdev;
ret = hid_sensor_parse_common_attributes(hsdev,
HID_USAGE_SENSOR_ACCEL_3D,
&accel_state->common_attributes);
if (ret) {
dev_err(&pdev->dev, "failed to setup common attributes\n");
goto error_free_dev;
}
channels = kmemdup(accel_3d_channels, sizeof(accel_3d_channels),
GFP_KERNEL);
if (!channels) {
ret = -ENOMEM;
dev_err(&pdev->dev, "failed to duplicate channels\n");
goto error_free_dev;
}
ret = accel_3d_parse_report(pdev, hsdev, channels,
HID_USAGE_SENSOR_ACCEL_3D, accel_state);
if (ret) {
dev_err(&pdev->dev, "failed to setup attributes\n");
goto error_free_dev_mem;
}
indio_dev->channels = channels;
indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
indio_dev->dev.parent = &pdev->dev;
indio_dev->info = &accel_3d_info;
indio_dev->name = name;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
NULL, NULL);
if (ret) {
dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
goto error_free_dev_mem;
}
accel_state->common_attributes.data_ready = false;
ret = hid_sensor_setup_trigger(indio_dev, name,
&accel_state->common_attributes);
if (ret < 0) {
dev_err(&pdev->dev, "trigger setup failed\n");
goto error_unreg_buffer_funcs;
}
ret = iio_device_register(indio_dev);
if (ret) {
dev_err(&pdev->dev, "device register failed\n");
goto error_remove_trigger;
}
accel_state->callbacks.send_event = accel_3d_proc_event;
accel_state->callbacks.capture_sample = accel_3d_capture_sample;
accel_state->callbacks.pdev = pdev;
ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D,
&accel_state->callbacks);
if (ret < 0) {
dev_err(&pdev->dev, "callback reg failed\n");
goto error_iio_unreg;
}
return ret;
error_iio_unreg:
iio_device_unregister(indio_dev);
error_remove_trigger:
hid_sensor_remove_trigger(indio_dev);
error_unreg_buffer_funcs:
iio_triggered_buffer_cleanup(indio_dev);
error_free_dev_mem:
kfree(indio_dev->channels);
error_free_dev:
iio_device_free(indio_dev);
error_ret:
return ret;
}
/* Function to deinitialize the processing for usage id */
static int hid_accel_3d_remove(struct platform_device *pdev)
{
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D);
iio_device_unregister(indio_dev);
hid_sensor_remove_trigger(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
kfree(indio_dev->channels);
iio_device_free(indio_dev);
return 0;
}
static struct platform_driver hid_accel_3d_platform_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
.probe = hid_accel_3d_probe,
.remove = hid_accel_3d_remove,
};
module_platform_driver(hid_accel_3d_platform_driver);
MODULE_DESCRIPTION("HID Sensor Accel 3D");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
MODULE_LICENSE("GPL");

287
drivers/iio/accel/kxsd9.c Normal file
View File

@@ -0,0 +1,287 @@
/*
* kxsd9.c simple support for the Kionix KXSD9 3D
* accelerometer.
*
* Copyright (c) 2008-2009 Jonathan Cameron <jic23@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The i2c interface is very similar, so shouldn't be a problem once
* I have a suitable wire made up.
*
* TODO: Support the motion detector
* Uses register address incrementing so could have a
* heavily optimized ring buffer access function.
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#define KXSD9_REG_X 0x00
#define KXSD9_REG_Y 0x02
#define KXSD9_REG_Z 0x04
#define KXSD9_REG_AUX 0x06
#define KXSD9_REG_RESET 0x0a
#define KXSD9_REG_CTRL_C 0x0c
#define KXSD9_FS_MASK 0x03
#define KXSD9_REG_CTRL_B 0x0d
#define KXSD9_REG_CTRL_A 0x0e
#define KXSD9_READ(a) (0x80 | (a))
#define KXSD9_WRITE(a) (a)
#define KXSD9_STATE_RX_SIZE 2
#define KXSD9_STATE_TX_SIZE 2
/**
* struct kxsd9_state - device related storage
* @buf_lock: protect the rx and tx buffers.
* @us: spi device
* @rx: single rx buffer storage
* @tx: single tx buffer storage
**/
struct kxsd9_state {
struct mutex buf_lock;
struct spi_device *us;
u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned;
u8 tx[KXSD9_STATE_TX_SIZE];
};
#define KXSD9_SCALE_2G "0.011978"
#define KXSD9_SCALE_4G "0.023927"
#define KXSD9_SCALE_6G "0.035934"
#define KXSD9_SCALE_8G "0.047853"
/* reverse order */
static const int kxsd9_micro_scales[4] = { 47853, 35934, 23927, 11978 };
static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro)
{
int ret, i;
struct kxsd9_state *st = iio_priv(indio_dev);
bool foundit = false;
for (i = 0; i < 4; i++)
if (micro == kxsd9_micro_scales[i]) {
foundit = true;
break;
}
if (!foundit)
return -EINVAL;
mutex_lock(&st->buf_lock);
ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
if (ret)
goto error_ret;
st->tx[0] = KXSD9_WRITE(KXSD9_REG_CTRL_C);
st->tx[1] = (ret & ~KXSD9_FS_MASK) | i;
ret = spi_write(st->us, st->tx, 2);
error_ret:
mutex_unlock(&st->buf_lock);
return ret;
}
static int kxsd9_read(struct iio_dev *indio_dev, u8 address)
{
int ret;
struct kxsd9_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.bits_per_word = 8,
.len = 1,
.delay_usecs = 200,
.tx_buf = st->tx,
}, {
.bits_per_word = 8,
.len = 2,
.rx_buf = st->rx,
},
};
mutex_lock(&st->buf_lock);
st->tx[0] = KXSD9_READ(address);
ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
if (ret)
return ret;
return (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0);
}
static IIO_CONST_ATTR(accel_scale_available,
KXSD9_SCALE_2G " "
KXSD9_SCALE_4G " "
KXSD9_SCALE_6G " "
KXSD9_SCALE_8G);
static struct attribute *kxsd9_attributes[] = {
&iio_const_attr_accel_scale_available.dev_attr.attr,
NULL,
};
static int kxsd9_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val,
int val2,
long mask)
{
int ret = -EINVAL;
if (mask == IIO_CHAN_INFO_SCALE) {
/* Check no integer component */
if (val)
return -EINVAL;
ret = kxsd9_write_scale(indio_dev, val2);
}
return ret;
}
static int kxsd9_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
{
int ret = -EINVAL;
struct kxsd9_state *st = iio_priv(indio_dev);
switch (mask) {
case IIO_CHAN_INFO_RAW:
ret = kxsd9_read(indio_dev, chan->address);
if (ret < 0)
goto error_ret;
*val = ret;
break;
case IIO_CHAN_INFO_SCALE:
ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
if (ret)
goto error_ret;
*val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK];
ret = IIO_VAL_INT_PLUS_MICRO;
break;
}
error_ret:
return ret;
};
#define KXSD9_ACCEL_CHAN(axis) \
{ \
.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), \
.address = KXSD9_REG_##axis, \
}
static const struct iio_chan_spec kxsd9_channels[] = {
KXSD9_ACCEL_CHAN(X), KXSD9_ACCEL_CHAN(Y), KXSD9_ACCEL_CHAN(Z),
{
.type = IIO_VOLTAGE,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
.indexed = 1,
.address = KXSD9_REG_AUX,
}
};
static const struct attribute_group kxsd9_attribute_group = {
.attrs = kxsd9_attributes,
};
static int kxsd9_power_up(struct kxsd9_state *st)
{
int ret;
st->tx[0] = 0x0d;
st->tx[1] = 0x40;
ret = spi_write(st->us, st->tx, 2);
if (ret)
return ret;
st->tx[0] = 0x0c;
st->tx[1] = 0x9b;
return spi_write(st->us, st->tx, 2);
};
static const struct iio_info kxsd9_info = {
.read_raw = &kxsd9_read_raw,
.write_raw = &kxsd9_write_raw,
.attrs = &kxsd9_attribute_group,
.driver_module = THIS_MODULE,
};
static int kxsd9_probe(struct spi_device *spi)
{
struct iio_dev *indio_dev;
struct kxsd9_state *st;
int ret;
indio_dev = iio_device_alloc(sizeof(*st));
if (indio_dev == NULL) {
ret = -ENOMEM;
goto error_ret;
}
st = iio_priv(indio_dev);
spi_set_drvdata(spi, indio_dev);
st->us = spi;
mutex_init(&st->buf_lock);
indio_dev->channels = kxsd9_channels;
indio_dev->num_channels = ARRAY_SIZE(kxsd9_channels);
indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &kxsd9_info;
indio_dev->modes = INDIO_DIRECT_MODE;
spi->mode = SPI_MODE_0;
spi_setup(spi);
kxsd9_power_up(st);
ret = iio_device_register(indio_dev);
if (ret)
goto error_free_dev;
return 0;
error_free_dev:
iio_device_free(indio_dev);
error_ret:
return ret;
}
static int kxsd9_remove(struct spi_device *spi)
{
iio_device_unregister(spi_get_drvdata(spi));
iio_device_free(spi_get_drvdata(spi));
return 0;
}
static const struct spi_device_id kxsd9_id[] = {
{"kxsd9", 0},
{ },
};
MODULE_DEVICE_TABLE(spi, kxsd9_id);
static struct spi_driver kxsd9_driver = {
.driver = {
.name = "kxsd9",
.owner = THIS_MODULE,
},
.probe = kxsd9_probe,
.remove = kxsd9_remove,
.id_table = kxsd9_id,
};
module_spi_driver(kxsd9_driver);
MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
MODULE_DESCRIPTION("Kionix KXSD9 SPI driver");
MODULE_LICENSE("GPL v2");

47
drivers/iio/accel/st_accel.h Normal file
View File

@@ -0,0 +1,47 @@
/*
* STMicroelectronics accelerometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
* v. 1.0.0
* Licensed under the GPL-2.
*/
#ifndef ST_ACCEL_H
#define ST_ACCEL_H
#include <linux/types.h>
#include <linux/iio/common/st_sensors.h>
#define LSM303DLHC_ACCEL_DEV_NAME "lsm303dlhc_accel"
#define LIS3DH_ACCEL_DEV_NAME "lis3dh"
#define LSM330D_ACCEL_DEV_NAME "lsm330d_accel"
#define LSM330DL_ACCEL_DEV_NAME "lsm330dl_accel"
#define LSM330DLC_ACCEL_DEV_NAME "lsm330dlc_accel"
#define LIS331DLH_ACCEL_DEV_NAME "lis331dlh"
#define LSM303DL_ACCEL_DEV_NAME "lsm303dl_accel"
#define LSM303DLH_ACCEL_DEV_NAME "lsm303dlh_accel"
#define LSM303DLM_ACCEL_DEV_NAME "lsm303dlm_accel"
#define LSM330_ACCEL_DEV_NAME "lsm330_accel"
int st_accel_common_probe(struct iio_dev *indio_dev);
void st_accel_common_remove(struct iio_dev *indio_dev);
#ifdef CONFIG_IIO_BUFFER
int st_accel_allocate_ring(struct iio_dev *indio_dev);
void st_accel_deallocate_ring(struct iio_dev *indio_dev);
int st_accel_trig_set_state(struct iio_trigger *trig, bool state);
#define ST_ACCEL_TRIGGER_SET_STATE (&st_accel_trig_set_state)
#else /* CONFIG_IIO_BUFFER */
static inline int st_accel_allocate_ring(struct iio_dev *indio_dev)
{
return 0;
}
static inline void st_accel_deallocate_ring(struct iio_dev *indio_dev)
{
}
#define ST_ACCEL_TRIGGER_SET_STATE NULL
#endif /* CONFIG_IIO_BUFFER */
#endif /* ST_ACCEL_H */

114
drivers/iio/accel/st_accel_buffer.c Normal file
View File

@@ -0,0 +1,114 @@
/*
* STMicroelectronics accelerometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/common/st_sensors.h>
#include "st_accel.h"
int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
{
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
return st_sensors_set_dataready_irq(indio_dev, state);
}
static int st_accel_buffer_preenable(struct iio_dev *indio_dev)
{
int err;
err = st_sensors_set_enable(indio_dev, true);
if (err < 0)
goto st_accel_set_enable_error;
err = iio_sw_buffer_preenable(indio_dev);
st_accel_set_enable_error:
return err;
}
static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *adata = iio_priv(indio_dev);
adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (adata->buffer_data == NULL) {
err = -ENOMEM;
goto allocate_memory_error;
}
err = st_sensors_set_axis_enable(indio_dev,
(u8)indio_dev->active_scan_mask[0]);
if (err < 0)
goto st_accel_buffer_postenable_error;
err = iio_triggered_buffer_postenable(indio_dev);
if (err < 0)
goto st_accel_buffer_postenable_error;
return err;
st_accel_buffer_postenable_error:
kfree(adata->buffer_data);
allocate_memory_error:
return err;
}
static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *adata = iio_priv(indio_dev);
err = iio_triggered_buffer_predisable(indio_dev);
if (err < 0)
goto st_accel_buffer_predisable_error;
err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
if (err < 0)
goto st_accel_buffer_predisable_error;
err = st_sensors_set_enable(indio_dev, false);
st_accel_buffer_predisable_error:
kfree(adata->buffer_data);
return err;
}
static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
.preenable = &st_accel_buffer_preenable,
.postenable = &st_accel_buffer_postenable,
.predisable = &st_accel_buffer_predisable,
};
int st_accel_allocate_ring(struct iio_dev *indio_dev)
{
return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
&st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
}
void st_accel_deallocate_ring(struct iio_dev *indio_dev)
{
iio_triggered_buffer_cleanup(indio_dev);
}
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer");
MODULE_LICENSE("GPL v2");

500
drivers/iio/accel/st_accel_core.c Normal file
View File

@@ -0,0 +1,500 @@
/*
* STMicroelectronics accelerometers driver
*
* Copyright 2012-2013 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/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>
#include <linux/iio/buffer.h>
#include <linux/iio/common/st_sensors.h>
#include "st_accel.h"
/* DEFAULT VALUE FOR SENSORS */
#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28
#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a
#define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR 0x2c
/* FULLSCALE */
#define ST_ACCEL_FS_AVL_2G 2
#define ST_ACCEL_FS_AVL_4G 4
#define ST_ACCEL_FS_AVL_6G 6
#define ST_ACCEL_FS_AVL_8G 8
#define ST_ACCEL_FS_AVL_16G 16
/* CUSTOM VALUES FOR SENSOR 1 */
#define ST_ACCEL_1_WAI_EXP 0x33
#define ST_ACCEL_1_ODR_ADDR 0x20
#define ST_ACCEL_1_ODR_MASK 0xf0
#define ST_ACCEL_1_ODR_AVL_1HZ_VAL 0x01
#define ST_ACCEL_1_ODR_AVL_10HZ_VAL 0x02
#define ST_ACCEL_1_ODR_AVL_25HZ_VAL 0x03
#define ST_ACCEL_1_ODR_AVL_50HZ_VAL 0x04
#define ST_ACCEL_1_ODR_AVL_100HZ_VAL 0x05
#define ST_ACCEL_1_ODR_AVL_200HZ_VAL 0x06
#define ST_ACCEL_1_ODR_AVL_400HZ_VAL 0x07
#define ST_ACCEL_1_ODR_AVL_1600HZ_VAL 0x08
#define ST_ACCEL_1_FS_ADDR 0x23
#define ST_ACCEL_1_FS_MASK 0x30
#define ST_ACCEL_1_FS_AVL_2_VAL 0x00
#define ST_ACCEL_1_FS_AVL_4_VAL 0x01
#define ST_ACCEL_1_FS_AVL_8_VAL 0x02
#define ST_ACCEL_1_FS_AVL_16_VAL 0x03
#define ST_ACCEL_1_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000)
#define ST_ACCEL_1_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000)
#define ST_ACCEL_1_FS_AVL_8_GAIN IIO_G_TO_M_S_2(4000)
#define ST_ACCEL_1_FS_AVL_16_GAIN IIO_G_TO_M_S_2(12000)
#define ST_ACCEL_1_BDU_ADDR 0x23
#define ST_ACCEL_1_BDU_MASK 0x80
#define ST_ACCEL_1_DRDY_IRQ_ADDR 0x22
#define ST_ACCEL_1_DRDY_IRQ_MASK 0x10
#define ST_ACCEL_1_MULTIREAD_BIT true
/* CUSTOM VALUES FOR SENSOR 2 */
#define ST_ACCEL_2_WAI_EXP 0x32
#define ST_ACCEL_2_ODR_ADDR 0x20
#define ST_ACCEL_2_ODR_MASK 0x18
#define ST_ACCEL_2_ODR_AVL_50HZ_VAL 0x00
#define ST_ACCEL_2_ODR_AVL_100HZ_VAL 0x01
#define ST_ACCEL_2_ODR_AVL_400HZ_VAL 0x02
#define ST_ACCEL_2_ODR_AVL_1000HZ_VAL 0x03
#define ST_ACCEL_2_PW_ADDR 0x20
#define ST_ACCEL_2_PW_MASK 0xe0
#define ST_ACCEL_2_FS_ADDR 0x23
#define ST_ACCEL_2_FS_MASK 0x30
#define ST_ACCEL_2_FS_AVL_2_VAL 0X00
#define ST_ACCEL_2_FS_AVL_4_VAL 0X01
#define ST_ACCEL_2_FS_AVL_8_VAL 0x03
#define ST_ACCEL_2_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000)
#define ST_ACCEL_2_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000)
#define ST_ACCEL_2_FS_AVL_8_GAIN IIO_G_TO_M_S_2(3900)
#define ST_ACCEL_2_BDU_ADDR 0x23
#define ST_ACCEL_2_BDU_MASK 0x80
#define ST_ACCEL_2_DRDY_IRQ_ADDR 0x22
#define ST_ACCEL_2_DRDY_IRQ_MASK 0x02
#define ST_ACCEL_2_MULTIREAD_BIT true
/* CUSTOM VALUES FOR SENSOR 3 */
#define ST_ACCEL_3_WAI_EXP 0x40
#define ST_ACCEL_3_ODR_ADDR 0x20
#define ST_ACCEL_3_ODR_MASK 0xf0
#define ST_ACCEL_3_ODR_AVL_3HZ_VAL 0x01
#define ST_ACCEL_3_ODR_AVL_6HZ_VAL 0x02
#define ST_ACCEL_3_ODR_AVL_12HZ_VAL 0x03
#define ST_ACCEL_3_ODR_AVL_25HZ_VAL 0x04
#define ST_ACCEL_3_ODR_AVL_50HZ_VAL 0x05
#define ST_ACCEL_3_ODR_AVL_100HZ_VAL 0x06
#define ST_ACCEL_3_ODR_AVL_200HZ_VAL 0x07
#define ST_ACCEL_3_ODR_AVL_400HZ_VAL 0x08
#define ST_ACCEL_3_ODR_AVL_800HZ_VAL 0x09
#define ST_ACCEL_3_ODR_AVL_1600HZ_VAL 0x0a
#define ST_ACCEL_3_FS_ADDR 0x24
#define ST_ACCEL_3_FS_MASK 0x38
#define ST_ACCEL_3_FS_AVL_2_VAL 0X00
#define ST_ACCEL_3_FS_AVL_4_VAL 0X01
#define ST_ACCEL_3_FS_AVL_6_VAL 0x02
#define ST_ACCEL_3_FS_AVL_8_VAL 0x03
#define ST_ACCEL_3_FS_AVL_16_VAL 0x04
#define ST_ACCEL_3_FS_AVL_2_GAIN IIO_G_TO_M_S_2(61)
#define ST_ACCEL_3_FS_AVL_4_GAIN IIO_G_TO_M_S_2(122)
#define ST_ACCEL_3_FS_AVL_6_GAIN IIO_G_TO_M_S_2(183)
#define ST_ACCEL_3_FS_AVL_8_GAIN IIO_G_TO_M_S_2(244)
#define ST_ACCEL_3_FS_AVL_16_GAIN IIO_G_TO_M_S_2(732)
#define ST_ACCEL_3_BDU_ADDR 0x20
#define ST_ACCEL_3_BDU_MASK 0x08
#define ST_ACCEL_3_DRDY_IRQ_ADDR 0x23
#define ST_ACCEL_3_DRDY_IRQ_MASK 0x80
#define ST_ACCEL_3_IG1_EN_ADDR 0x23
#define ST_ACCEL_3_IG1_EN_MASK 0x08
#define ST_ACCEL_3_MULTIREAD_BIT false
static const struct iio_chan_spec st_accel_12bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE,
ST_SENSORS_DEFAULT_12_REALBITS, ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE,
ST_SENSORS_DEFAULT_12_REALBITS, ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE,
ST_SENSORS_DEFAULT_12_REALBITS, ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct iio_chan_spec st_accel_16bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE,
ST_SENSORS_DEFAULT_16_REALBITS, ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct st_sensors st_accel_sensors[] = {
{
.wai = ST_ACCEL_1_WAI_EXP,
.sensors_supported = {
[0] = LIS3DH_ACCEL_DEV_NAME,
[1] = LSM303DLHC_ACCEL_DEV_NAME,
[2] = LSM330D_ACCEL_DEV_NAME,
[3] = LSM330DL_ACCEL_DEV_NAME,
[4] = LSM330DLC_ACCEL_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
.odr = {
.addr = ST_ACCEL_1_ODR_ADDR,
.mask = ST_ACCEL_1_ODR_MASK,
.odr_avl = {
{ 1, ST_ACCEL_1_ODR_AVL_1HZ_VAL, },
{ 10, ST_ACCEL_1_ODR_AVL_10HZ_VAL, },
{ 25, ST_ACCEL_1_ODR_AVL_25HZ_VAL, },
{ 50, ST_ACCEL_1_ODR_AVL_50HZ_VAL, },
{ 100, ST_ACCEL_1_ODR_AVL_100HZ_VAL, },
{ 200, ST_ACCEL_1_ODR_AVL_200HZ_VAL, },
{ 400, ST_ACCEL_1_ODR_AVL_400HZ_VAL, },
{ 1600, ST_ACCEL_1_ODR_AVL_1600HZ_VAL, },
},
},
.pw = {
.addr = ST_ACCEL_1_ODR_ADDR,
.mask = ST_ACCEL_1_ODR_MASK,
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
},
.enable_axis = {
.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
},
.fs = {
.addr = ST_ACCEL_1_FS_ADDR,
.mask = ST_ACCEL_1_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_ACCEL_FS_AVL_2G,
.value = ST_ACCEL_1_FS_AVL_2_VAL,
.gain = ST_ACCEL_1_FS_AVL_2_GAIN,
},
[1] = {
.num = ST_ACCEL_FS_AVL_4G,
.value = ST_ACCEL_1_FS_AVL_4_VAL,
.gain = ST_ACCEL_1_FS_AVL_4_GAIN,
},
[2] = {
.num = ST_ACCEL_FS_AVL_8G,
.value = ST_ACCEL_1_FS_AVL_8_VAL,
.gain = ST_ACCEL_1_FS_AVL_8_GAIN,
},
[3] = {
.num = ST_ACCEL_FS_AVL_16G,
.value = ST_ACCEL_1_FS_AVL_16_VAL,
.gain = ST_ACCEL_1_FS_AVL_16_GAIN,
},
},
},
.bdu = {
.addr = ST_ACCEL_1_BDU_ADDR,
.mask = ST_ACCEL_1_BDU_MASK,
},
.drdy_irq = {
.addr = ST_ACCEL_1_DRDY_IRQ_ADDR,
.mask = ST_ACCEL_1_DRDY_IRQ_MASK,
},
.multi_read_bit = ST_ACCEL_1_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_ACCEL_2_WAI_EXP,
.sensors_supported = {
[0] = LIS331DLH_ACCEL_DEV_NAME,
[1] = LSM303DL_ACCEL_DEV_NAME,
[2] = LSM303DLH_ACCEL_DEV_NAME,
[3] = LSM303DLM_ACCEL_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_accel_12bit_channels,
.odr = {
.addr = ST_ACCEL_2_ODR_ADDR,
.mask = ST_ACCEL_2_ODR_MASK,
.odr_avl = {
{ 50, ST_ACCEL_2_ODR_AVL_50HZ_VAL, },
{ 100, ST_ACCEL_2_ODR_AVL_100HZ_VAL, },
{ 400, ST_ACCEL_2_ODR_AVL_400HZ_VAL, },
{ 1000, ST_ACCEL_2_ODR_AVL_1000HZ_VAL, },
},
},
.pw = {
.addr = ST_ACCEL_2_PW_ADDR,
.mask = ST_ACCEL_2_PW_MASK,
.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
},
.enable_axis = {
.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
},
.fs = {
.addr = ST_ACCEL_2_FS_ADDR,
.mask = ST_ACCEL_2_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_ACCEL_FS_AVL_2G,
.value = ST_ACCEL_2_FS_AVL_2_VAL,
.gain = ST_ACCEL_2_FS_AVL_2_GAIN,
},
[1] = {
.num = ST_ACCEL_FS_AVL_4G,
.value = ST_ACCEL_2_FS_AVL_4_VAL,
.gain = ST_ACCEL_2_FS_AVL_4_GAIN,
},
[2] = {
.num = ST_ACCEL_FS_AVL_8G,
.value = ST_ACCEL_2_FS_AVL_8_VAL,
.gain = ST_ACCEL_2_FS_AVL_8_GAIN,
},
},
},
.bdu = {
.addr = ST_ACCEL_2_BDU_ADDR,
.mask = ST_ACCEL_2_BDU_MASK,
},
.drdy_irq = {
.addr = ST_ACCEL_2_DRDY_IRQ_ADDR,
.mask = ST_ACCEL_2_DRDY_IRQ_MASK,
},
.multi_read_bit = ST_ACCEL_2_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_ACCEL_3_WAI_EXP,
.sensors_supported = {
[0] = LSM330_ACCEL_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_accel_16bit_channels,
.odr = {
.addr = ST_ACCEL_3_ODR_ADDR,
.mask = ST_ACCEL_3_ODR_MASK,
.odr_avl = {
{ 3, ST_ACCEL_3_ODR_AVL_3HZ_VAL },
{ 6, ST_ACCEL_3_ODR_AVL_6HZ_VAL, },
{ 12, ST_ACCEL_3_ODR_AVL_12HZ_VAL, },
{ 25, ST_ACCEL_3_ODR_AVL_25HZ_VAL, },
{ 50, ST_ACCEL_3_ODR_AVL_50HZ_VAL, },
{ 100, ST_ACCEL_3_ODR_AVL_100HZ_VAL, },
{ 200, ST_ACCEL_3_ODR_AVL_200HZ_VAL, },
{ 400, ST_ACCEL_3_ODR_AVL_400HZ_VAL, },
{ 800, ST_ACCEL_3_ODR_AVL_800HZ_VAL, },
{ 1600, ST_ACCEL_3_ODR_AVL_1600HZ_VAL, },
},
},
.pw = {
.addr = ST_ACCEL_3_ODR_ADDR,
.mask = ST_ACCEL_3_ODR_MASK,
.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
},
.enable_axis = {
.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
},
.fs = {
.addr = ST_ACCEL_3_FS_ADDR,
.mask = ST_ACCEL_3_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_ACCEL_FS_AVL_2G,
.value = ST_ACCEL_3_FS_AVL_2_VAL,
.gain = ST_ACCEL_3_FS_AVL_2_GAIN,
},
[1] = {
.num = ST_ACCEL_FS_AVL_4G,
.value = ST_ACCEL_3_FS_AVL_4_VAL,
.gain = ST_ACCEL_3_FS_AVL_4_GAIN,
},
[2] = {
.num = ST_ACCEL_FS_AVL_6G,
.value = ST_ACCEL_3_FS_AVL_6_VAL,
.gain = ST_ACCEL_3_FS_AVL_6_GAIN,
},
[3] = {
.num = ST_ACCEL_FS_AVL_8G,
.value = ST_ACCEL_3_FS_AVL_8_VAL,
.gain = ST_ACCEL_3_FS_AVL_8_GAIN,
},
[4] = {
.num = ST_ACCEL_FS_AVL_16G,
.value = ST_ACCEL_3_FS_AVL_16_VAL,
.gain = ST_ACCEL_3_FS_AVL_16_GAIN,
},
},
},
.bdu = {
.addr = ST_ACCEL_3_BDU_ADDR,
.mask = ST_ACCEL_3_BDU_MASK,
},
.drdy_irq = {
.addr = ST_ACCEL_3_DRDY_IRQ_ADDR,
.mask = ST_ACCEL_3_DRDY_IRQ_MASK,
.ig1 = {
.en_addr = ST_ACCEL_3_IG1_EN_ADDR,
.en_mask = ST_ACCEL_3_IG1_EN_MASK,
},
},
.multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT,
.bootime = 2,
},
};
static int st_accel_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 *adata = 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;
*val2 = adata->current_fullscale->gain;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
read_error:
return err;
}
static int st_accel_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val, int val2, long mask)
{
int err;
switch (mask) {
case IIO_CHAN_INFO_SCALE:
err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
break;
default:
return -EINVAL;
}
return err;
}
static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
static struct attribute *st_accel_attributes[] = {
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
&iio_dev_attr_sampling_frequency.dev_attr.attr,
NULL,
};
static const struct attribute_group st_accel_attribute_group = {
.attrs = st_accel_attributes,
};
static const struct iio_info accel_info = {
.driver_module = THIS_MODULE,
.attrs = &st_accel_attribute_group,
.read_raw = &st_accel_read_raw,
.write_raw = &st_accel_write_raw,
};
#ifdef CONFIG_IIO_TRIGGER
static const struct iio_trigger_ops st_accel_trigger_ops = {
.owner = THIS_MODULE,
.set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
};
#define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
#else
#define ST_ACCEL_TRIGGER_OPS NULL
#endif
int st_accel_common_probe(struct iio_dev *indio_dev)
{
int err;
struct st_sensor_data *adata = iio_priv(indio_dev);
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &accel_info;
err = st_sensors_check_device_support(indio_dev,
ARRAY_SIZE(st_accel_sensors), st_accel_sensors);
if (err < 0)
goto st_accel_common_probe_error;
adata->multiread_bit = adata->sensor->multi_read_bit;
indio_dev->channels = adata->sensor->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
adata->current_fullscale = (struct st_sensor_fullscale_avl *)
&adata->sensor->fs.fs_avl[0];
adata->odr = adata->sensor->odr.odr_avl[0].hz;
err = st_sensors_init_sensor(indio_dev);
if (err < 0)
goto st_accel_common_probe_error;
if (adata->get_irq_data_ready(indio_dev) > 0) {
err = st_accel_allocate_ring(indio_dev);
if (err < 0)
goto st_accel_common_probe_error;
err = st_sensors_allocate_trigger(indio_dev,
ST_ACCEL_TRIGGER_OPS);
if (err < 0)
goto st_accel_probe_trigger_error;
}
err = iio_device_register(indio_dev);
if (err)
goto st_accel_device_register_error;
return err;
st_accel_device_register_error:
if (adata->get_irq_data_ready(indio_dev) > 0)
st_sensors_deallocate_trigger(indio_dev);
st_accel_probe_trigger_error:
if (adata->get_irq_data_ready(indio_dev) > 0)
st_accel_deallocate_ring(indio_dev);
st_accel_common_probe_error:
return err;
}
EXPORT_SYMBOL(st_accel_common_probe);
void st_accel_common_remove(struct iio_dev *indio_dev)
{
struct st_sensor_data *adata = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
if (adata->get_irq_data_ready(indio_dev) > 0) {
st_sensors_deallocate_trigger(indio_dev);
st_accel_deallocate_ring(indio_dev);
}
iio_device_free(indio_dev);
}
EXPORT_SYMBOL(st_accel_common_remove);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
MODULE_LICENSE("GPL v2");

86
drivers/iio/accel/st_accel_i2c.c Normal file
View File

@@ -0,0 +1,86 @@
/*
* STMicroelectronics accelerometers driver
*
* Copyright 2012-2013 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/i2c.h>
#include <linux/iio/iio.h>
#include <linux/iio/common/st_sensors.h>
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_accel.h"
static int st_accel_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct iio_dev *indio_dev;
struct st_sensor_data *adata;
int err;
indio_dev = iio_device_alloc(sizeof(*adata));
if (indio_dev == NULL) {
err = -ENOMEM;
goto iio_device_alloc_error;
}
adata = iio_priv(indio_dev);
adata->dev = &client->dev;
st_sensors_i2c_configure(indio_dev, client, adata);
err = st_accel_common_probe(indio_dev);
if (err < 0)
goto st_accel_common_probe_error;
return 0;
st_accel_common_probe_error:
iio_device_free(indio_dev);
iio_device_alloc_error:
return err;
}
static int st_accel_i2c_remove(struct i2c_client *client)
{
st_accel_common_remove(i2c_get_clientdata(client));
return 0;
}
static const struct i2c_device_id st_accel_id_table[] = {
{ LSM303DLH_ACCEL_DEV_NAME },
{ LSM303DLHC_ACCEL_DEV_NAME },
{ LIS3DH_ACCEL_DEV_NAME },
{ LSM330D_ACCEL_DEV_NAME },
{ LSM330DL_ACCEL_DEV_NAME },
{ LSM330DLC_ACCEL_DEV_NAME },
{ LIS331DLH_ACCEL_DEV_NAME },
{ LSM303DL_ACCEL_DEV_NAME },
{ LSM303DLM_ACCEL_DEV_NAME },
{ LSM330_ACCEL_DEV_NAME },
{},
};
MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
static struct i2c_driver st_accel_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-accel-i2c",
},
.probe = st_accel_i2c_probe,
.remove = st_accel_i2c_remove,
.id_table = st_accel_id_table,
};
module_i2c_driver(st_accel_driver);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics accelerometers i2c driver");
MODULE_LICENSE("GPL v2");

85
drivers/iio/accel/st_accel_spi.c Normal file
View File

@@ -0,0 +1,85 @@
/*
* STMicroelectronics accelerometers driver
*
* Copyright 2012-2013 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/spi/spi.h>
#include <linux/iio/iio.h>
#include <linux/iio/common/st_sensors.h>
#include <linux/iio/common/st_sensors_spi.h>
#include "st_accel.h"
static int st_accel_spi_probe(struct spi_device *spi)
{
struct iio_dev *indio_dev;
struct st_sensor_data *adata;
int err;
indio_dev = iio_device_alloc(sizeof(*adata));
if (indio_dev == NULL) {
err = -ENOMEM;
goto iio_device_alloc_error;
}
adata = iio_priv(indio_dev);
adata->dev = &spi->dev;
st_sensors_spi_configure(indio_dev, spi, adata);
err = st_accel_common_probe(indio_dev);
if (err < 0)
goto st_accel_common_probe_error;
return 0;
st_accel_common_probe_error:
iio_device_free(indio_dev);
iio_device_alloc_error:
return err;
}
static int st_accel_spi_remove(struct spi_device *spi)
{
st_accel_common_remove(spi_get_drvdata(spi));
return 0;
}
static const struct spi_device_id st_accel_id_table[] = {
{ LSM303DLH_ACCEL_DEV_NAME },
{ LSM303DLHC_ACCEL_DEV_NAME },
{ LIS3DH_ACCEL_DEV_NAME },
{ LSM330D_ACCEL_DEV_NAME },
{ LSM330DL_ACCEL_DEV_NAME },
{ LSM330DLC_ACCEL_DEV_NAME },
{ LIS331DLH_ACCEL_DEV_NAME },
{ LSM303DL_ACCEL_DEV_NAME },
{ LSM303DLM_ACCEL_DEV_NAME },
{ LSM330_ACCEL_DEV_NAME },
{},
};
MODULE_DEVICE_TABLE(spi, st_accel_id_table);
static struct spi_driver st_accel_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "st-accel-spi",
},
.probe = st_accel_spi_probe,
.remove = st_accel_spi_remove,
.id_table = st_accel_id_table,
};
module_spi_driver(st_accel_driver);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics accelerometers spi driver");
MODULE_LICENSE("GPL v2");