srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 1 | /* |
| 2 | * HID Sensors Driver |
| 3 | * Copyright (c) 2012, Intel Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | * |
| 18 | */ |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/irq.h> |
| 24 | #include <linux/slab.h> |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 25 | #include <linux/delay.h> |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 26 | #include <linux/hid-sensor-hub.h> |
| 27 | #include <linux/iio/iio.h> |
| 28 | #include <linux/iio/sysfs.h> |
| 29 | #include <linux/iio/buffer.h> |
| 30 | #include <linux/iio/trigger_consumer.h> |
| 31 | #include <linux/iio/triggered_buffer.h> |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 32 | #include "../common/hid-sensors/hid-sensor-trigger.h" |
| 33 | |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 34 | enum magn_3d_channel { |
| 35 | CHANNEL_SCAN_INDEX_X, |
| 36 | CHANNEL_SCAN_INDEX_Y, |
| 37 | CHANNEL_SCAN_INDEX_Z, |
| 38 | MAGN_3D_CHANNEL_MAX, |
| 39 | }; |
| 40 | |
| 41 | struct magn_3d_state { |
| 42 | struct hid_sensor_hub_callbacks callbacks; |
Alexander Holler | e07c6d1 | 2012-12-15 12:45:00 +0000 | [diff] [blame] | 43 | struct hid_sensor_common common_attributes; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 44 | struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX]; |
| 45 | u32 magn_val[MAGN_3D_CHANNEL_MAX]; |
Srinivas Pandruvada | 92463fd | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 46 | int scale_pre_decml; |
| 47 | int scale_post_decml; |
| 48 | int scale_precision; |
| 49 | int value_offset; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 50 | }; |
| 51 | |
| 52 | static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = { |
| 53 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS, |
| 54 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS, |
| 55 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS |
| 56 | }; |
| 57 | |
| 58 | /* Channel definitions */ |
| 59 | static const struct iio_chan_spec magn_3d_channels[] = { |
| 60 | { |
| 61 | .type = IIO_MAGN, |
| 62 | .modified = 1, |
| 63 | .channel2 = IIO_MOD_X, |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 64 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
Jonathan Cameron | ecbe18f | 2013-02-27 19:03:04 +0000 | [diff] [blame] | 65 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
| 66 | BIT(IIO_CHAN_INFO_SCALE) | |
| 67 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
| 68 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 69 | .scan_index = CHANNEL_SCAN_INDEX_X, |
| 70 | }, { |
| 71 | .type = IIO_MAGN, |
| 72 | .modified = 1, |
| 73 | .channel2 = IIO_MOD_Y, |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 74 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
Jonathan Cameron | ecbe18f | 2013-02-27 19:03:04 +0000 | [diff] [blame] | 75 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
| 76 | BIT(IIO_CHAN_INFO_SCALE) | |
| 77 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
| 78 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 79 | .scan_index = CHANNEL_SCAN_INDEX_Y, |
| 80 | }, { |
| 81 | .type = IIO_MAGN, |
| 82 | .modified = 1, |
| 83 | .channel2 = IIO_MOD_Z, |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 84 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
Jonathan Cameron | ecbe18f | 2013-02-27 19:03:04 +0000 | [diff] [blame] | 85 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | |
| 86 | BIT(IIO_CHAN_INFO_SCALE) | |
| 87 | BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
| 88 | BIT(IIO_CHAN_INFO_HYSTERESIS), |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 89 | .scan_index = CHANNEL_SCAN_INDEX_Z, |
| 90 | } |
| 91 | }; |
| 92 | |
| 93 | /* Adjust channel real bits based on report descriptor */ |
| 94 | static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels, |
| 95 | int channel, int size) |
| 96 | { |
| 97 | channels[channel].scan_type.sign = 's'; |
| 98 | /* Real storage bits will change based on the report desc. */ |
| 99 | channels[channel].scan_type.realbits = size * 8; |
| 100 | /* Maximum size of a sample to capture is u32 */ |
| 101 | channels[channel].scan_type.storagebits = sizeof(u32) * 8; |
| 102 | } |
| 103 | |
| 104 | /* Channel read_raw handler */ |
| 105 | static int magn_3d_read_raw(struct iio_dev *indio_dev, |
| 106 | struct iio_chan_spec const *chan, |
| 107 | int *val, int *val2, |
| 108 | long mask) |
| 109 | { |
| 110 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
| 111 | int report_id = -1; |
| 112 | u32 address; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 113 | int ret_type; |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 114 | s32 poll_value; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 115 | |
| 116 | *val = 0; |
| 117 | *val2 = 0; |
| 118 | switch (mask) { |
| 119 | case 0: |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 120 | poll_value = hid_sensor_read_poll_value( |
| 121 | &magn_state->common_attributes); |
| 122 | if (poll_value < 0) |
| 123 | return -EINVAL; |
| 124 | |
| 125 | hid_sensor_power_state(&magn_state->common_attributes, true); |
| 126 | msleep_interruptible(poll_value * 2); |
| 127 | |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 128 | report_id = |
| 129 | magn_state->magn[chan->scan_index].report_id; |
| 130 | address = magn_3d_addresses[chan->scan_index]; |
| 131 | if (report_id >= 0) |
| 132 | *val = sensor_hub_input_attr_get_raw_value( |
| 133 | magn_state->common_attributes.hsdev, |
| 134 | HID_USAGE_SENSOR_COMPASS_3D, address, |
| 135 | report_id); |
| 136 | else { |
| 137 | *val = 0; |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 138 | hid_sensor_power_state(&magn_state->common_attributes, |
| 139 | false); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 140 | return -EINVAL; |
| 141 | } |
Srinivas Pandruvada | 8009c59 | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 142 | hid_sensor_power_state(&magn_state->common_attributes, false); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 143 | ret_type = IIO_VAL_INT; |
| 144 | break; |
| 145 | case IIO_CHAN_INFO_SCALE: |
Srinivas Pandruvada | 92463fd | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 146 | *val = magn_state->scale_pre_decml; |
| 147 | *val2 = magn_state->scale_post_decml; |
| 148 | ret_type = magn_state->scale_precision; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 149 | break; |
| 150 | case IIO_CHAN_INFO_OFFSET: |
Srinivas Pandruvada | 92463fd | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 151 | *val = magn_state->value_offset; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 152 | ret_type = IIO_VAL_INT; |
| 153 | break; |
| 154 | case IIO_CHAN_INFO_SAMP_FREQ: |
Sachin Kamat | 5f25b41 | 2014-03-07 07:44:00 +0000 | [diff] [blame^] | 155 | ret_type = hid_sensor_read_samp_freq_value( |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 156 | &magn_state->common_attributes, val, val2); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 157 | break; |
| 158 | case IIO_CHAN_INFO_HYSTERESIS: |
Sachin Kamat | 5f25b41 | 2014-03-07 07:44:00 +0000 | [diff] [blame^] | 159 | ret_type = hid_sensor_read_raw_hyst_value( |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 160 | &magn_state->common_attributes, val, val2); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 161 | break; |
| 162 | default: |
| 163 | ret_type = -EINVAL; |
| 164 | break; |
| 165 | } |
| 166 | |
| 167 | return ret_type; |
| 168 | } |
| 169 | |
| 170 | /* Channel write_raw handler */ |
| 171 | static int magn_3d_write_raw(struct iio_dev *indio_dev, |
| 172 | struct iio_chan_spec const *chan, |
| 173 | int val, |
| 174 | int val2, |
| 175 | long mask) |
| 176 | { |
| 177 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
| 178 | int ret = 0; |
| 179 | |
| 180 | switch (mask) { |
| 181 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 182 | ret = hid_sensor_write_samp_freq_value( |
| 183 | &magn_state->common_attributes, val, val2); |
| 184 | break; |
| 185 | case IIO_CHAN_INFO_HYSTERESIS: |
| 186 | ret = hid_sensor_write_raw_hyst_value( |
| 187 | &magn_state->common_attributes, val, val2); |
| 188 | break; |
| 189 | default: |
| 190 | ret = -EINVAL; |
| 191 | } |
| 192 | |
| 193 | return ret; |
| 194 | } |
| 195 | |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 196 | static const struct iio_info magn_3d_info = { |
| 197 | .driver_module = THIS_MODULE, |
| 198 | .read_raw = &magn_3d_read_raw, |
| 199 | .write_raw = &magn_3d_write_raw, |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 200 | }; |
| 201 | |
| 202 | /* Function to push data to buffer */ |
Lars-Peter Clausen | 8c60c7e | 2013-09-15 17:50:00 +0100 | [diff] [blame] | 203 | static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data, |
| 204 | int len) |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 205 | { |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 206 | dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n"); |
Lars-Peter Clausen | 8c60c7e | 2013-09-15 17:50:00 +0100 | [diff] [blame] | 207 | iio_push_to_buffers(indio_dev, data); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /* Callback handler to send event after all samples are received and captured */ |
| 211 | static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev, |
| 212 | unsigned usage_id, |
| 213 | void *priv) |
| 214 | { |
| 215 | struct iio_dev *indio_dev = platform_get_drvdata(priv); |
| 216 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
| 217 | |
Srinivas Pandruvada | 56ff6be | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 218 | dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n"); |
| 219 | if (atomic_read(&magn_state->common_attributes.data_ready)) |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 220 | hid_sensor_push_data(indio_dev, |
Lars-Peter Clausen | 8c60c7e | 2013-09-15 17:50:00 +0100 | [diff] [blame] | 221 | magn_state->magn_val, |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 222 | sizeof(magn_state->magn_val)); |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | /* Capture samples in local storage */ |
| 228 | static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev, |
| 229 | unsigned usage_id, |
| 230 | size_t raw_len, char *raw_data, |
| 231 | void *priv) |
| 232 | { |
| 233 | struct iio_dev *indio_dev = platform_get_drvdata(priv); |
| 234 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
| 235 | int offset; |
| 236 | int ret = -EINVAL; |
| 237 | |
| 238 | switch (usage_id) { |
| 239 | case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS: |
| 240 | case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS: |
| 241 | case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS: |
| 242 | offset = usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS; |
| 243 | magn_state->magn_val[CHANNEL_SCAN_INDEX_X + offset] = |
| 244 | *(u32 *)raw_data; |
| 245 | ret = 0; |
| 246 | break; |
| 247 | default: |
| 248 | break; |
| 249 | } |
| 250 | |
| 251 | return ret; |
| 252 | } |
| 253 | |
| 254 | /* Parse report which is specific to an usage id*/ |
| 255 | static int magn_3d_parse_report(struct platform_device *pdev, |
| 256 | struct hid_sensor_hub_device *hsdev, |
| 257 | struct iio_chan_spec *channels, |
| 258 | unsigned usage_id, |
| 259 | struct magn_3d_state *st) |
| 260 | { |
| 261 | int ret; |
| 262 | int i; |
| 263 | |
| 264 | for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) { |
| 265 | ret = sensor_hub_input_get_attribute_info(hsdev, |
| 266 | HID_INPUT_REPORT, |
| 267 | usage_id, |
| 268 | HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS + i, |
| 269 | &st->magn[CHANNEL_SCAN_INDEX_X + i]); |
| 270 | if (ret < 0) |
| 271 | break; |
| 272 | magn_3d_adjust_channel_bit_mask(channels, |
| 273 | CHANNEL_SCAN_INDEX_X + i, |
| 274 | st->magn[CHANNEL_SCAN_INDEX_X + i].size); |
| 275 | } |
| 276 | dev_dbg(&pdev->dev, "magn_3d %x:%x, %x:%x, %x:%x\n", |
| 277 | st->magn[0].index, |
| 278 | st->magn[0].report_id, |
| 279 | st->magn[1].index, st->magn[1].report_id, |
| 280 | st->magn[2].index, st->magn[2].report_id); |
| 281 | |
Srinivas Pandruvada | 92463fd | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 282 | st->scale_precision = hid_sensor_format_scale( |
| 283 | HID_USAGE_SENSOR_COMPASS_3D, |
| 284 | &st->magn[CHANNEL_SCAN_INDEX_X], |
| 285 | &st->scale_pre_decml, &st->scale_post_decml); |
| 286 | |
Srinivas Pandruvada | 2461fc9 | 2013-11-06 00:11:00 +0000 | [diff] [blame] | 287 | /* Set Sensitivity field ids, when there is no individual modifier */ |
| 288 | if (st->common_attributes.sensitivity.index < 0) { |
| 289 | sensor_hub_input_get_attribute_info(hsdev, |
| 290 | HID_FEATURE_REPORT, usage_id, |
| 291 | HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS | |
| 292 | HID_USAGE_SENSOR_DATA_ORIENTATION, |
| 293 | &st->common_attributes.sensitivity); |
| 294 | dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n", |
| 295 | st->common_attributes.sensitivity.index, |
| 296 | st->common_attributes.sensitivity.report_id); |
| 297 | } |
| 298 | |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 299 | return ret; |
| 300 | } |
| 301 | |
| 302 | /* Function to initialize the processing for usage id */ |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 303 | static int hid_magn_3d_probe(struct platform_device *pdev) |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 304 | { |
| 305 | int ret = 0; |
| 306 | static char *name = "magn_3d"; |
| 307 | struct iio_dev *indio_dev; |
| 308 | struct magn_3d_state *magn_state; |
| 309 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
| 310 | struct iio_chan_spec *channels; |
| 311 | |
Sachin Kamat | 907c0a0 | 2013-08-02 11:08:00 +0100 | [diff] [blame] | 312 | indio_dev = devm_iio_device_alloc(&pdev->dev, |
| 313 | sizeof(struct magn_3d_state)); |
| 314 | if (indio_dev == NULL) |
| 315 | return -ENOMEM; |
| 316 | |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 317 | platform_set_drvdata(pdev, indio_dev); |
| 318 | |
| 319 | magn_state = iio_priv(indio_dev); |
| 320 | magn_state->common_attributes.hsdev = hsdev; |
| 321 | magn_state->common_attributes.pdev = pdev; |
| 322 | |
| 323 | ret = hid_sensor_parse_common_attributes(hsdev, |
| 324 | HID_USAGE_SENSOR_COMPASS_3D, |
| 325 | &magn_state->common_attributes); |
| 326 | if (ret) { |
| 327 | dev_err(&pdev->dev, "failed to setup common attributes\n"); |
Sachin Kamat | 907c0a0 | 2013-08-02 11:08:00 +0100 | [diff] [blame] | 328 | return ret; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 329 | } |
| 330 | |
Axel Lin | 64ebe95 | 2012-10-27 16:03:00 +0100 | [diff] [blame] | 331 | channels = kmemdup(magn_3d_channels, sizeof(magn_3d_channels), |
| 332 | GFP_KERNEL); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 333 | if (!channels) { |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 334 | dev_err(&pdev->dev, "failed to duplicate channels\n"); |
Sachin Kamat | 907c0a0 | 2013-08-02 11:08:00 +0100 | [diff] [blame] | 335 | return -ENOMEM; |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | ret = magn_3d_parse_report(pdev, hsdev, channels, |
| 339 | HID_USAGE_SENSOR_COMPASS_3D, magn_state); |
| 340 | if (ret) { |
| 341 | dev_err(&pdev->dev, "failed to setup attributes\n"); |
| 342 | goto error_free_dev_mem; |
| 343 | } |
| 344 | |
| 345 | indio_dev->channels = channels; |
| 346 | indio_dev->num_channels = ARRAY_SIZE(magn_3d_channels); |
| 347 | indio_dev->dev.parent = &pdev->dev; |
| 348 | indio_dev->info = &magn_3d_info; |
| 349 | indio_dev->name = name; |
| 350 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 351 | |
| 352 | ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, |
| 353 | NULL, NULL); |
| 354 | if (ret) { |
| 355 | dev_err(&pdev->dev, "failed to initialize trigger buffer\n"); |
| 356 | goto error_free_dev_mem; |
| 357 | } |
Srinivas Pandruvada | 56ff6be | 2014-04-19 00:22:00 +0100 | [diff] [blame] | 358 | atomic_set(&magn_state->common_attributes.data_ready, 0); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 359 | ret = hid_sensor_setup_trigger(indio_dev, name, |
| 360 | &magn_state->common_attributes); |
| 361 | if (ret < 0) { |
| 362 | dev_err(&pdev->dev, "trigger setup failed\n"); |
| 363 | goto error_unreg_buffer_funcs; |
| 364 | } |
| 365 | |
| 366 | ret = iio_device_register(indio_dev); |
| 367 | if (ret) { |
| 368 | dev_err(&pdev->dev, "device register failed\n"); |
| 369 | goto error_remove_trigger; |
| 370 | } |
| 371 | |
| 372 | magn_state->callbacks.send_event = magn_3d_proc_event; |
| 373 | magn_state->callbacks.capture_sample = magn_3d_capture_sample; |
| 374 | magn_state->callbacks.pdev = pdev; |
| 375 | ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D, |
| 376 | &magn_state->callbacks); |
| 377 | if (ret < 0) { |
| 378 | dev_err(&pdev->dev, "callback reg failed\n"); |
| 379 | goto error_iio_unreg; |
| 380 | } |
| 381 | |
| 382 | return ret; |
| 383 | |
| 384 | error_iio_unreg: |
| 385 | iio_device_unregister(indio_dev); |
| 386 | error_remove_trigger: |
Srinivas Pandruvada | ec7f68e | 2013-10-30 22:48:00 +0000 | [diff] [blame] | 387 | hid_sensor_remove_trigger(&magn_state->common_attributes); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 388 | error_unreg_buffer_funcs: |
| 389 | iio_triggered_buffer_cleanup(indio_dev); |
| 390 | error_free_dev_mem: |
| 391 | kfree(indio_dev->channels); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 392 | return ret; |
| 393 | } |
| 394 | |
| 395 | /* Function to deinitialize the processing for usage id */ |
Greg Kroah-Hartman | fc52692 | 2012-12-21 13:21:43 -0800 | [diff] [blame] | 396 | static int hid_magn_3d_remove(struct platform_device *pdev) |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 397 | { |
| 398 | struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; |
| 399 | struct iio_dev *indio_dev = platform_get_drvdata(pdev); |
Srinivas Pandruvada | ec7f68e | 2013-10-30 22:48:00 +0000 | [diff] [blame] | 400 | struct magn_3d_state *magn_state = iio_priv(indio_dev); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 401 | |
| 402 | sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D); |
| 403 | iio_device_unregister(indio_dev); |
Srinivas Pandruvada | ec7f68e | 2013-10-30 22:48:00 +0000 | [diff] [blame] | 404 | hid_sensor_remove_trigger(&magn_state->common_attributes); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 405 | iio_triggered_buffer_cleanup(indio_dev); |
| 406 | kfree(indio_dev->channels); |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
Alexander Holler | a67c385 | 2013-07-10 09:32:00 +0100 | [diff] [blame] | 411 | static struct platform_device_id hid_magn_3d_ids[] = { |
| 412 | { |
| 413 | /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ |
| 414 | .name = "HID-SENSOR-200083", |
| 415 | }, |
| 416 | { /* sentinel */ } |
| 417 | }; |
| 418 | MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids); |
| 419 | |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 420 | static struct platform_driver hid_magn_3d_platform_driver = { |
Alexander Holler | a67c385 | 2013-07-10 09:32:00 +0100 | [diff] [blame] | 421 | .id_table = hid_magn_3d_ids, |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 422 | .driver = { |
Alexander Holler | a67c385 | 2013-07-10 09:32:00 +0100 | [diff] [blame] | 423 | .name = KBUILD_MODNAME, |
srinivas pandruvada | bc1d57ba | 2012-09-05 13:56:00 +0100 | [diff] [blame] | 424 | .owner = THIS_MODULE, |
| 425 | }, |
| 426 | .probe = hid_magn_3d_probe, |
| 427 | .remove = hid_magn_3d_remove, |
| 428 | }; |
| 429 | module_platform_driver(hid_magn_3d_platform_driver); |
| 430 | |
| 431 | MODULE_DESCRIPTION("HID Sensor Magnetometer 3D"); |
| 432 | MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); |
| 433 | MODULE_LICENSE("GPL"); |