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16#include <linux/iio/common/ssp_sensors.h>
17#include <linux/iio/iio.h>
18#include <linux/iio/buffer.h>
19#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_GYROSCOPE_NAME "ssp-gyroscope"
28static const char ssp_gyro_name[] = SSP_GYROSCOPE_NAME;
29
30enum ssp_gyro_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_gyro_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_GYROSCOPE_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_gyro_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_GYROSCOPE_SENSOR, ret);
67 if (ret < 0)
68 dev_err(&indio_dev->dev, "gyro sensor enable fail\n");
69
70 return ret;
71 default:
72 break;
73 }
74
75 return -EINVAL;
76}
77
78static const struct iio_info ssp_gyro_iio_info = {
79 .read_raw = &ssp_gyro_read_raw,
80 .write_raw = &ssp_gyro_write_raw,
81};
82
83static const unsigned long ssp_gyro_scan_mask[] = { 0x07, 0, };
84
85static const struct iio_chan_spec ssp_gyro_channels[] = {
86 SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X),
87 SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y),
88 SSP_CHANNEL_AG(IIO_ANGL_VEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z),
89 SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME),
90};
91
92static int ssp_process_gyro_data(struct iio_dev *indio_dev, void *buf,
93 int64_t timestamp)
94{
95 return ssp_common_process_data(indio_dev, buf, SSP_GYROSCOPE_SIZE,
96 timestamp);
97}
98
99static const struct iio_buffer_setup_ops ssp_gyro_buffer_ops = {
100 .postenable = &ssp_common_buffer_postenable,
101 .postdisable = &ssp_common_buffer_postdisable,
102};
103
104static int ssp_gyro_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_gyro_data;
118 spd->type = SSP_GYROSCOPE_SENSOR;
119
120 indio_dev->name = ssp_gyro_name;
121 indio_dev->dev.parent = &pdev->dev;
122 indio_dev->info = &ssp_gyro_iio_info;
123 indio_dev->modes = INDIO_BUFFER_SOFTWARE;
124 indio_dev->channels = ssp_gyro_channels;
125 indio_dev->num_channels = ARRAY_SIZE(ssp_gyro_channels);
126 indio_dev->available_scan_masks = ssp_gyro_scan_mask;
127
128 buffer = devm_iio_kfifo_allocate(&pdev->dev);
129 if (!buffer)
130 return -ENOMEM;
131
132 iio_device_attach_buffer(indio_dev, buffer);
133
134 indio_dev->setup_ops = &ssp_gyro_buffer_ops;
135
136 platform_set_drvdata(pdev, indio_dev);
137
138 ret = devm_iio_device_register(&pdev->dev, indio_dev);
139 if (ret < 0)
140 return ret;
141
142
143 ssp_register_consumer(indio_dev, SSP_GYROSCOPE_SENSOR);
144
145 return 0;
146}
147
148static struct platform_driver ssp_gyro_driver = {
149 .driver = {
150 .name = SSP_GYROSCOPE_NAME,
151 },
152 .probe = ssp_gyro_probe,
153};
154
155module_platform_driver(ssp_gyro_driver);
156
157MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
158MODULE_DESCRIPTION("Samsung sensorhub gyroscopes driver");
159MODULE_LICENSE("GPL");
160
