Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 1 | /* |
| 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 Cameron | 8abd5ba | 2017-01-02 19:28:30 +0000 | [diff] [blame] | 18 | #include <linux/iio/buffer.h> |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 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_ACCEL_NAME "ssp-accelerometer" |
| 28 | static const char ssp_accel_device_name[] = SSP_ACCEL_NAME; |
| 29 | |
| 30 | enum 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 | |
| 37 | static 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 | |
| 56 | static 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 Lawall | 7504dfc | 2016-09-16 12:55:24 +0200 | [diff] [blame] | 78 | static const struct iio_info ssp_accel_iio_info = { |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 79 | .read_raw = &ssp_accel_read_raw, |
| 80 | .write_raw = &ssp_accel_write_raw, |
| 81 | }; |
| 82 | |
| 83 | static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, }; |
| 84 | |
| 85 | static 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 | |
| 92 | static 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 | |
| 99 | static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = { |
| 100 | .postenable = &ssp_common_buffer_postenable, |
| 101 | .postdisable = &ssp_common_buffer_postdisable, |
| 102 | }; |
| 103 | |
| 104 | static 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 Yongjun | fa4c115 | 2017-01-22 16:36:12 +0000 | [diff] [blame] | 139 | ret = devm_iio_device_register(&pdev->dev, indio_dev); |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 140 | 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 Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 149 | static struct platform_driver ssp_accel_driver = { |
| 150 | .driver = { |
| 151 | .name = SSP_ACCEL_NAME, |
| 152 | }, |
| 153 | .probe = ssp_accel_probe, |
Karol Wrona | 3755a1d | 2015-01-28 15:05:53 +0100 | [diff] [blame] | 154 | }; |
| 155 | |
| 156 | module_platform_driver(ssp_accel_driver); |
| 157 | |
| 158 | MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); |
| 159 | MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver"); |
| 160 | MODULE_LICENSE("GPL"); |