blob: dd6ece8f92390c6077ae6dbd889d5c0714b567c4 [file] [log] [blame]
Karol Wrona3755a1d2015-01-28 15:05:53 +01001/*
2 * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16#include <linux/iio/common/ssp_sensors.h>
17#include <linux/iio/iio.h>
Jonathan Cameron8abd5ba2017-01-02 19:28:30 +000018#include <linux/iio/buffer.h>
Karol Wrona3755a1d2015-01-28 15:05:53 +010019#include <linux/iio/kfifo_buf.h>
20#include <linux/module.h>
21#include <linux/platform_device.h>
22#include <linux/slab.h>
23#include "../common/ssp_sensors/ssp_iio_sensor.h"
24
25#define SSP_CHANNEL_COUNT 3
26
27#define SSP_ACCEL_NAME "ssp-accelerometer"
28static const char ssp_accel_device_name[] = SSP_ACCEL_NAME;
29
30enum ssp_accel_3d_channel {
31 SSP_CHANNEL_SCAN_INDEX_X,
32 SSP_CHANNEL_SCAN_INDEX_Y,
33 SSP_CHANNEL_SCAN_INDEX_Z,
34 SSP_CHANNEL_SCAN_INDEX_TIME,
35};
36
37static int ssp_accel_read_raw(struct iio_dev *indio_dev,
38 struct iio_chan_spec const *chan, int *val,
39 int *val2, long mask)
40{
41 u32 t;
42 struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
43
44 switch (mask) {
45 case IIO_CHAN_INFO_SAMP_FREQ:
46 t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR);
47 ssp_convert_to_freq(t, val, val2);
48 return IIO_VAL_INT_PLUS_MICRO;
49 default:
50 break;
51 }
52
53 return -EINVAL;
54}
55
56static int ssp_accel_write_raw(struct iio_dev *indio_dev,
57 struct iio_chan_spec const *chan, int val,
58 int val2, long mask)
59{
60 int ret;
61 struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
62
63 switch (mask) {
64 case IIO_CHAN_INFO_SAMP_FREQ:
65 ret = ssp_convert_to_time(val, val2);
66 ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret);
67 if (ret < 0)
68 dev_err(&indio_dev->dev, "accel sensor enable fail\n");
69
70 return ret;
71 default:
72 break;
73 }
74
75 return -EINVAL;
76}
77
Julia Lawall7504dfc2016-09-16 12:55:24 +020078static const struct iio_info ssp_accel_iio_info = {
Karol Wrona3755a1d2015-01-28 15:05:53 +010079 .read_raw = &ssp_accel_read_raw,
80 .write_raw = &ssp_accel_write_raw,
81};
82
83static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, };
84
85static const struct iio_chan_spec ssp_acc_channels[] = {
86 SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X),
87 SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y),
88 SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z),
89 SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME),
90};
91
92static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf,
93 int64_t timestamp)
94{
95 return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE,
96 timestamp);
97}
98
99static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = {
100 .postenable = &ssp_common_buffer_postenable,
101 .postdisable = &ssp_common_buffer_postdisable,
102};
103
104static int ssp_accel_probe(struct platform_device *pdev)
105{
106 int ret;
107 struct iio_dev *indio_dev;
108 struct ssp_sensor_data *spd;
109 struct iio_buffer *buffer;
110
111 indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
112 if (!indio_dev)
113 return -ENOMEM;
114
115 spd = iio_priv(indio_dev);
116
117 spd->process_data = ssp_process_accel_data;
118 spd->type = SSP_ACCELEROMETER_SENSOR;
119
120 indio_dev->name = ssp_accel_device_name;
121 indio_dev->dev.parent = &pdev->dev;
122 indio_dev->dev.of_node = pdev->dev.of_node;
123 indio_dev->info = &ssp_accel_iio_info;
124 indio_dev->modes = INDIO_BUFFER_SOFTWARE;
125 indio_dev->channels = ssp_acc_channels;
126 indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
127 indio_dev->available_scan_masks = ssp_accel_scan_mask;
128
129 buffer = devm_iio_kfifo_allocate(&pdev->dev);
130 if (!buffer)
131 return -ENOMEM;
132
133 iio_device_attach_buffer(indio_dev, buffer);
134
135 indio_dev->setup_ops = &ssp_accel_buffer_ops;
136
137 platform_set_drvdata(pdev, indio_dev);
138
Wei Yongjunfa4c1152017-01-22 16:36:12 +0000139 ret = devm_iio_device_register(&pdev->dev, indio_dev);
Karol Wrona3755a1d2015-01-28 15:05:53 +0100140 if (ret < 0)
141 return ret;
142
143 /* ssp registering should be done after all iio setup */
144 ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR);
145
146 return 0;
147}
148
Karol Wrona3755a1d2015-01-28 15:05:53 +0100149static struct platform_driver ssp_accel_driver = {
150 .driver = {
151 .name = SSP_ACCEL_NAME,
152 },
153 .probe = ssp_accel_probe,
Karol Wrona3755a1d2015-01-28 15:05:53 +0100154};
155
156module_platform_driver(ssp_accel_driver);
157
158MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
159MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver");
160MODULE_LICENSE("GPL");