Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 1 | /* |
| 2 | * vivid-sdr-cap.c - software defined radio support functions. |
| 3 | * |
| 4 | * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you may redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 11 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 12 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 13 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 14 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 16 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 17 | * SOFTWARE. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/kthread.h> |
| 24 | #include <linux/freezer.h> |
Antti Palosaari | f335c3f | 2015-09-01 20:04:50 -0300 | [diff] [blame] | 25 | #include <linux/math64.h> |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 26 | #include <linux/videodev2.h> |
| 27 | #include <linux/v4l2-dv-timings.h> |
| 28 | #include <media/v4l2-common.h> |
| 29 | #include <media/v4l2-event.h> |
| 30 | #include <media/v4l2-dv-timings.h> |
Prashant Laddha | 4e30a37 | 2015-02-04 06:07:31 -0300 | [diff] [blame] | 31 | #include <linux/fixp-arith.h> |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 32 | |
| 33 | #include "vivid-core.h" |
| 34 | #include "vivid-ctrls.h" |
| 35 | #include "vivid-sdr-cap.h" |
| 36 | |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 37 | /* stream formats */ |
| 38 | struct vivid_format { |
| 39 | u32 pixelformat; |
| 40 | u32 buffersize; |
| 41 | }; |
| 42 | |
| 43 | /* format descriptions for capture and preview */ |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 44 | static const struct vivid_format formats[] = { |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 45 | { |
| 46 | .pixelformat = V4L2_SDR_FMT_CU8, |
| 47 | .buffersize = SDR_CAP_SAMPLES_PER_BUF * 2, |
| 48 | }, { |
| 49 | .pixelformat = V4L2_SDR_FMT_CS8, |
| 50 | .buffersize = SDR_CAP_SAMPLES_PER_BUF * 2, |
| 51 | }, |
| 52 | }; |
| 53 | |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 54 | static const struct v4l2_frequency_band bands_adc[] = { |
| 55 | { |
| 56 | .tuner = 0, |
| 57 | .type = V4L2_TUNER_ADC, |
| 58 | .index = 0, |
| 59 | .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
| 60 | .rangelow = 300000, |
| 61 | .rangehigh = 300000, |
| 62 | }, |
| 63 | { |
| 64 | .tuner = 0, |
| 65 | .type = V4L2_TUNER_ADC, |
| 66 | .index = 1, |
| 67 | .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
| 68 | .rangelow = 900001, |
| 69 | .rangehigh = 2800000, |
| 70 | }, |
| 71 | { |
| 72 | .tuner = 0, |
| 73 | .type = V4L2_TUNER_ADC, |
| 74 | .index = 2, |
| 75 | .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
| 76 | .rangelow = 3200000, |
| 77 | .rangehigh = 3200000, |
| 78 | }, |
| 79 | }; |
| 80 | |
| 81 | /* ADC band midpoints */ |
| 82 | #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2) |
| 83 | #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2) |
| 84 | |
| 85 | static const struct v4l2_frequency_band bands_fm[] = { |
| 86 | { |
| 87 | .tuner = 1, |
| 88 | .type = V4L2_TUNER_RF, |
| 89 | .index = 0, |
| 90 | .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
| 91 | .rangelow = 50000000, |
| 92 | .rangehigh = 2000000000, |
| 93 | }, |
| 94 | }; |
| 95 | |
| 96 | static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev) |
| 97 | { |
| 98 | struct vivid_buffer *sdr_cap_buf = NULL; |
| 99 | |
| 100 | dprintk(dev, 1, "SDR Capture Thread Tick\n"); |
| 101 | |
| 102 | /* Drop a certain percentage of buffers. */ |
| 103 | if (dev->perc_dropped_buffers && |
| 104 | prandom_u32_max(100) < dev->perc_dropped_buffers) |
| 105 | return; |
| 106 | |
| 107 | spin_lock(&dev->slock); |
| 108 | if (!list_empty(&dev->sdr_cap_active)) { |
| 109 | sdr_cap_buf = list_entry(dev->sdr_cap_active.next, |
| 110 | struct vivid_buffer, list); |
| 111 | list_del(&sdr_cap_buf->list); |
| 112 | } |
| 113 | spin_unlock(&dev->slock); |
| 114 | |
| 115 | if (sdr_cap_buf) { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 116 | sdr_cap_buf->vb.sequence = dev->sdr_cap_seq_count; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 117 | vivid_sdr_cap_process(dev, sdr_cap_buf); |
Junghak Sung | d6dd645 | 2015-11-03 08:16:37 -0200 | [diff] [blame] | 118 | sdr_cap_buf->vb.vb2_buf.timestamp = |
| 119 | ktime_get_ns() + dev->time_wrap_offset; |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 120 | vb2_buffer_done(&sdr_cap_buf->vb.vb2_buf, dev->dqbuf_error ? |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 121 | VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); |
| 122 | dev->dqbuf_error = false; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | static int vivid_thread_sdr_cap(void *data) |
| 127 | { |
| 128 | struct vivid_dev *dev = data; |
| 129 | u64 samples_since_start; |
| 130 | u64 buffers_since_start; |
| 131 | u64 next_jiffies_since_start; |
| 132 | unsigned long jiffies_since_start; |
| 133 | unsigned long cur_jiffies; |
| 134 | unsigned wait_jiffies; |
| 135 | |
| 136 | dprintk(dev, 1, "SDR Capture Thread Start\n"); |
| 137 | |
| 138 | set_freezable(); |
| 139 | |
| 140 | /* Resets frame counters */ |
| 141 | dev->sdr_cap_seq_offset = 0; |
| 142 | if (dev->seq_wrap) |
| 143 | dev->sdr_cap_seq_offset = 0xffffff80U; |
| 144 | dev->jiffies_sdr_cap = jiffies; |
| 145 | dev->sdr_cap_seq_resync = false; |
| 146 | |
| 147 | for (;;) { |
| 148 | try_to_freeze(); |
| 149 | if (kthread_should_stop()) |
| 150 | break; |
| 151 | |
| 152 | mutex_lock(&dev->mutex); |
| 153 | cur_jiffies = jiffies; |
| 154 | if (dev->sdr_cap_seq_resync) { |
| 155 | dev->jiffies_sdr_cap = cur_jiffies; |
| 156 | dev->sdr_cap_seq_offset = dev->sdr_cap_seq_count + 1; |
| 157 | dev->sdr_cap_seq_count = 0; |
| 158 | dev->sdr_cap_seq_resync = false; |
| 159 | } |
| 160 | /* Calculate the number of jiffies since we started streaming */ |
| 161 | jiffies_since_start = cur_jiffies - dev->jiffies_sdr_cap; |
| 162 | /* Get the number of buffers streamed since the start */ |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 163 | buffers_since_start = |
| 164 | (u64)jiffies_since_start * dev->sdr_adc_freq + |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 165 | (HZ * SDR_CAP_SAMPLES_PER_BUF) / 2; |
| 166 | do_div(buffers_since_start, HZ * SDR_CAP_SAMPLES_PER_BUF); |
| 167 | |
| 168 | /* |
| 169 | * After more than 0xf0000000 (rounded down to a multiple of |
| 170 | * 'jiffies-per-day' to ease jiffies_to_msecs calculation) |
| 171 | * jiffies have passed since we started streaming reset the |
| 172 | * counters and keep track of the sequence offset. |
| 173 | */ |
| 174 | if (jiffies_since_start > JIFFIES_RESYNC) { |
| 175 | dev->jiffies_sdr_cap = cur_jiffies; |
| 176 | dev->sdr_cap_seq_offset = buffers_since_start; |
| 177 | buffers_since_start = 0; |
| 178 | } |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 179 | dev->sdr_cap_seq_count = |
| 180 | buffers_since_start + dev->sdr_cap_seq_offset; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 181 | |
| 182 | vivid_thread_sdr_cap_tick(dev); |
| 183 | mutex_unlock(&dev->mutex); |
| 184 | |
| 185 | /* |
| 186 | * Calculate the number of samples streamed since we started, |
| 187 | * not including the current buffer. |
| 188 | */ |
| 189 | samples_since_start = buffers_since_start * SDR_CAP_SAMPLES_PER_BUF; |
| 190 | |
| 191 | /* And the number of jiffies since we started */ |
| 192 | jiffies_since_start = jiffies - dev->jiffies_sdr_cap; |
| 193 | |
| 194 | /* Increase by the number of samples in one buffer */ |
| 195 | samples_since_start += SDR_CAP_SAMPLES_PER_BUF; |
| 196 | /* |
| 197 | * Calculate when that next buffer is supposed to start |
| 198 | * in jiffies since we started streaming. |
| 199 | */ |
| 200 | next_jiffies_since_start = samples_since_start * HZ + |
| 201 | dev->sdr_adc_freq / 2; |
| 202 | do_div(next_jiffies_since_start, dev->sdr_adc_freq); |
| 203 | /* If it is in the past, then just schedule asap */ |
| 204 | if (next_jiffies_since_start < jiffies_since_start) |
| 205 | next_jiffies_since_start = jiffies_since_start; |
| 206 | |
| 207 | wait_jiffies = next_jiffies_since_start - jiffies_since_start; |
| 208 | schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1); |
| 209 | } |
| 210 | dprintk(dev, 1, "SDR Capture Thread End\n"); |
| 211 | return 0; |
| 212 | } |
| 213 | |
Hans Verkuil | df9ecb0 | 2015-10-28 00:50:37 -0200 | [diff] [blame] | 214 | static int sdr_cap_queue_setup(struct vb2_queue *vq, |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 215 | unsigned *nbuffers, unsigned *nplanes, |
Hans Verkuil | 36c0f8b | 2016-04-15 09:15:05 -0300 | [diff] [blame] | 216 | unsigned sizes[], struct device *alloc_devs[]) |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 217 | { |
| 218 | /* 2 = max 16-bit sample returned */ |
| 219 | sizes[0] = SDR_CAP_SAMPLES_PER_BUF * 2; |
| 220 | *nplanes = 1; |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static int sdr_cap_buf_prepare(struct vb2_buffer *vb) |
| 225 | { |
| 226 | struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); |
| 227 | unsigned size = SDR_CAP_SAMPLES_PER_BUF * 2; |
| 228 | |
| 229 | dprintk(dev, 1, "%s\n", __func__); |
| 230 | |
| 231 | if (dev->buf_prepare_error) { |
| 232 | /* |
| 233 | * Error injection: test what happens if buf_prepare() returns |
| 234 | * an error. |
| 235 | */ |
| 236 | dev->buf_prepare_error = false; |
| 237 | return -EINVAL; |
| 238 | } |
| 239 | if (vb2_plane_size(vb, 0) < size) { |
| 240 | dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n", |
| 241 | __func__, vb2_plane_size(vb, 0), size); |
| 242 | return -EINVAL; |
| 243 | } |
| 244 | vb2_set_plane_payload(vb, 0, size); |
| 245 | |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | static void sdr_cap_buf_queue(struct vb2_buffer *vb) |
| 250 | { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 251 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 252 | struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 253 | struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 254 | |
| 255 | dprintk(dev, 1, "%s\n", __func__); |
| 256 | |
| 257 | spin_lock(&dev->slock); |
| 258 | list_add_tail(&buf->list, &dev->sdr_cap_active); |
| 259 | spin_unlock(&dev->slock); |
| 260 | } |
| 261 | |
| 262 | static int sdr_cap_start_streaming(struct vb2_queue *vq, unsigned count) |
| 263 | { |
| 264 | struct vivid_dev *dev = vb2_get_drv_priv(vq); |
| 265 | int err = 0; |
| 266 | |
| 267 | dprintk(dev, 1, "%s\n", __func__); |
| 268 | dev->sdr_cap_seq_count = 0; |
| 269 | if (dev->start_streaming_error) { |
| 270 | dev->start_streaming_error = false; |
| 271 | err = -EINVAL; |
| 272 | } else if (dev->kthread_sdr_cap == NULL) { |
| 273 | dev->kthread_sdr_cap = kthread_run(vivid_thread_sdr_cap, dev, |
| 274 | "%s-sdr-cap", dev->v4l2_dev.name); |
| 275 | |
| 276 | if (IS_ERR(dev->kthread_sdr_cap)) { |
| 277 | v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n"); |
| 278 | err = PTR_ERR(dev->kthread_sdr_cap); |
| 279 | dev->kthread_sdr_cap = NULL; |
| 280 | } |
| 281 | } |
| 282 | if (err) { |
| 283 | struct vivid_buffer *buf, *tmp; |
| 284 | |
| 285 | list_for_each_entry_safe(buf, tmp, &dev->sdr_cap_active, list) { |
| 286 | list_del(&buf->list); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 287 | vb2_buffer_done(&buf->vb.vb2_buf, |
| 288 | VB2_BUF_STATE_QUEUED); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | return err; |
| 292 | } |
| 293 | |
| 294 | /* abort streaming and wait for last buffer */ |
| 295 | static void sdr_cap_stop_streaming(struct vb2_queue *vq) |
| 296 | { |
| 297 | struct vivid_dev *dev = vb2_get_drv_priv(vq); |
| 298 | |
| 299 | if (dev->kthread_sdr_cap == NULL) |
| 300 | return; |
| 301 | |
| 302 | while (!list_empty(&dev->sdr_cap_active)) { |
| 303 | struct vivid_buffer *buf; |
| 304 | |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 305 | buf = list_entry(dev->sdr_cap_active.next, |
| 306 | struct vivid_buffer, list); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 307 | list_del(&buf->list); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 308 | vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | /* shutdown control thread */ |
| 312 | mutex_unlock(&dev->mutex); |
| 313 | kthread_stop(dev->kthread_sdr_cap); |
| 314 | dev->kthread_sdr_cap = NULL; |
| 315 | mutex_lock(&dev->mutex); |
| 316 | } |
| 317 | |
| 318 | const struct vb2_ops vivid_sdr_cap_qops = { |
| 319 | .queue_setup = sdr_cap_queue_setup, |
| 320 | .buf_prepare = sdr_cap_buf_prepare, |
| 321 | .buf_queue = sdr_cap_buf_queue, |
| 322 | .start_streaming = sdr_cap_start_streaming, |
| 323 | .stop_streaming = sdr_cap_stop_streaming, |
Prabhakar Lad | 6dfa513 | 2014-11-18 08:23:39 -0300 | [diff] [blame] | 324 | .wait_prepare = vb2_ops_wait_prepare, |
| 325 | .wait_finish = vb2_ops_wait_finish, |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 326 | }; |
| 327 | |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 328 | int vivid_sdr_enum_freq_bands(struct file *file, void *fh, |
| 329 | struct v4l2_frequency_band *band) |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 330 | { |
| 331 | switch (band->tuner) { |
| 332 | case 0: |
| 333 | if (band->index >= ARRAY_SIZE(bands_adc)) |
| 334 | return -EINVAL; |
| 335 | *band = bands_adc[band->index]; |
| 336 | return 0; |
| 337 | case 1: |
| 338 | if (band->index >= ARRAY_SIZE(bands_fm)) |
| 339 | return -EINVAL; |
| 340 | *band = bands_fm[band->index]; |
| 341 | return 0; |
| 342 | default: |
| 343 | return -EINVAL; |
| 344 | } |
| 345 | } |
| 346 | |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 347 | int vivid_sdr_g_frequency(struct file *file, void *fh, |
| 348 | struct v4l2_frequency *vf) |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 349 | { |
| 350 | struct vivid_dev *dev = video_drvdata(file); |
| 351 | |
| 352 | switch (vf->tuner) { |
| 353 | case 0: |
| 354 | vf->frequency = dev->sdr_adc_freq; |
| 355 | vf->type = V4L2_TUNER_ADC; |
| 356 | return 0; |
| 357 | case 1: |
| 358 | vf->frequency = dev->sdr_fm_freq; |
| 359 | vf->type = V4L2_TUNER_RF; |
| 360 | return 0; |
| 361 | default: |
| 362 | return -EINVAL; |
| 363 | } |
| 364 | } |
| 365 | |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 366 | int vivid_sdr_s_frequency(struct file *file, void *fh, |
| 367 | const struct v4l2_frequency *vf) |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 368 | { |
| 369 | struct vivid_dev *dev = video_drvdata(file); |
| 370 | unsigned freq = vf->frequency; |
| 371 | unsigned band; |
| 372 | |
| 373 | switch (vf->tuner) { |
| 374 | case 0: |
| 375 | if (vf->type != V4L2_TUNER_ADC) |
| 376 | return -EINVAL; |
| 377 | if (freq < BAND_ADC_0) |
| 378 | band = 0; |
| 379 | else if (freq < BAND_ADC_1) |
| 380 | band = 1; |
| 381 | else |
| 382 | band = 2; |
| 383 | |
| 384 | freq = clamp_t(unsigned, freq, |
| 385 | bands_adc[band].rangelow, |
| 386 | bands_adc[band].rangehigh); |
| 387 | |
| 388 | if (vb2_is_streaming(&dev->vb_sdr_cap_q) && |
| 389 | freq != dev->sdr_adc_freq) { |
| 390 | /* resync the thread's timings */ |
| 391 | dev->sdr_cap_seq_resync = true; |
| 392 | } |
| 393 | dev->sdr_adc_freq = freq; |
| 394 | return 0; |
| 395 | case 1: |
| 396 | if (vf->type != V4L2_TUNER_RF) |
| 397 | return -EINVAL; |
| 398 | dev->sdr_fm_freq = clamp_t(unsigned, freq, |
| 399 | bands_fm[0].rangelow, |
| 400 | bands_fm[0].rangehigh); |
| 401 | return 0; |
| 402 | default: |
| 403 | return -EINVAL; |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | int vivid_sdr_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt) |
| 408 | { |
| 409 | switch (vt->index) { |
| 410 | case 0: |
| 411 | strlcpy(vt->name, "ADC", sizeof(vt->name)); |
| 412 | vt->type = V4L2_TUNER_ADC; |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 413 | vt->capability = |
| 414 | V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 415 | vt->rangelow = bands_adc[0].rangelow; |
| 416 | vt->rangehigh = bands_adc[2].rangehigh; |
| 417 | return 0; |
| 418 | case 1: |
| 419 | strlcpy(vt->name, "RF", sizeof(vt->name)); |
| 420 | vt->type = V4L2_TUNER_RF; |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 421 | vt->capability = |
| 422 | V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 423 | vt->rangelow = bands_fm[0].rangelow; |
| 424 | vt->rangehigh = bands_fm[0].rangehigh; |
| 425 | return 0; |
| 426 | default: |
| 427 | return -EINVAL; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | int vivid_sdr_s_tuner(struct file *file, void *fh, const struct v4l2_tuner *vt) |
| 432 | { |
| 433 | if (vt->index > 1) |
| 434 | return -EINVAL; |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | int vidioc_enum_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f) |
| 439 | { |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 440 | if (f->index >= ARRAY_SIZE(formats)) |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 441 | return -EINVAL; |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 442 | f->pixelformat = formats[f->index].pixelformat; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | int vidioc_g_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f) |
| 447 | { |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 448 | struct vivid_dev *dev = video_drvdata(file); |
| 449 | |
| 450 | f->fmt.sdr.pixelformat = dev->sdr_pixelformat; |
| 451 | f->fmt.sdr.buffersize = dev->sdr_buffersize; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 452 | memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); |
| 453 | return 0; |
| 454 | } |
| 455 | |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 456 | int vidioc_s_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f) |
| 457 | { |
| 458 | struct vivid_dev *dev = video_drvdata(file); |
| 459 | struct vb2_queue *q = &dev->vb_sdr_cap_q; |
| 460 | int i; |
| 461 | |
| 462 | if (vb2_is_busy(q)) |
| 463 | return -EBUSY; |
| 464 | |
| 465 | memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); |
| 466 | for (i = 0; i < ARRAY_SIZE(formats); i++) { |
| 467 | if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { |
| 468 | dev->sdr_pixelformat = formats[i].pixelformat; |
| 469 | dev->sdr_buffersize = formats[i].buffersize; |
| 470 | f->fmt.sdr.buffersize = formats[i].buffersize; |
| 471 | return 0; |
| 472 | } |
| 473 | } |
| 474 | dev->sdr_pixelformat = formats[0].pixelformat; |
| 475 | dev->sdr_buffersize = formats[0].buffersize; |
| 476 | f->fmt.sdr.pixelformat = formats[0].pixelformat; |
| 477 | f->fmt.sdr.buffersize = formats[0].buffersize; |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | int vidioc_try_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f) |
| 482 | { |
| 483 | int i; |
| 484 | |
| 485 | memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); |
| 486 | for (i = 0; i < ARRAY_SIZE(formats); i++) { |
| 487 | if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { |
| 488 | f->fmt.sdr.buffersize = formats[i].buffersize; |
| 489 | return 0; |
| 490 | } |
| 491 | } |
| 492 | f->fmt.sdr.pixelformat = formats[0].pixelformat; |
| 493 | f->fmt.sdr.buffersize = formats[0].buffersize; |
| 494 | return 0; |
| 495 | } |
| 496 | |
Prashant Laddha | 4e30a37 | 2015-02-04 06:07:31 -0300 | [diff] [blame] | 497 | #define FIXP_N (15) |
| 498 | #define FIXP_FRAC (1 << FIXP_N) |
| 499 | #define FIXP_2PI ((int)(2 * 3.141592653589 * FIXP_FRAC)) |
Antti Palosaari | f335c3f | 2015-09-01 20:04:50 -0300 | [diff] [blame] | 500 | #define M_100000PI (3.14159 * 100000) |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 501 | |
| 502 | void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf) |
| 503 | { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 504 | u8 *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 505 | unsigned long i; |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 506 | unsigned long plane_size = vb2_plane_size(&buf->vb.vb2_buf, 0); |
Antti Palosaari | f335c3f | 2015-09-01 20:04:50 -0300 | [diff] [blame] | 507 | s64 s64tmp; |
Prashant Laddha | 4e30a37 | 2015-02-04 06:07:31 -0300 | [diff] [blame] | 508 | s32 src_phase_step; |
| 509 | s32 mod_phase_step; |
| 510 | s32 fixp_i; |
| 511 | s32 fixp_q; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 512 | |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 513 | /* calculate phase step */ |
| 514 | #define BEEP_FREQ 1000 /* 1kHz beep */ |
Prashant Laddha | 4e30a37 | 2015-02-04 06:07:31 -0300 | [diff] [blame] | 515 | src_phase_step = DIV_ROUND_CLOSEST(FIXP_2PI * BEEP_FREQ, |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 516 | dev->sdr_adc_freq); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 517 | |
| 518 | for (i = 0; i < plane_size; i += 2) { |
Prashant Laddha | 4e30a37 | 2015-02-04 06:07:31 -0300 | [diff] [blame] | 519 | mod_phase_step = fixp_cos32_rad(dev->sdr_fixp_src_phase, |
| 520 | FIXP_2PI) >> (31 - FIXP_N); |
| 521 | |
| 522 | dev->sdr_fixp_src_phase += src_phase_step; |
Antti Palosaari | f335c3f | 2015-09-01 20:04:50 -0300 | [diff] [blame] | 523 | s64tmp = (s64) mod_phase_step * dev->sdr_fm_deviation; |
| 524 | dev->sdr_fixp_mod_phase += div_s64(s64tmp, M_100000PI); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 525 | |
| 526 | /* |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 527 | * Transfer phase angle to [0, 2xPI] in order to avoid variable |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 528 | * overflow and make it suitable for cosine implementation |
| 529 | * used, which does not support negative angles. |
| 530 | */ |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 531 | dev->sdr_fixp_src_phase %= FIXP_2PI; |
| 532 | dev->sdr_fixp_mod_phase %= FIXP_2PI; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 533 | |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 534 | if (dev->sdr_fixp_mod_phase < 0) |
| 535 | dev->sdr_fixp_mod_phase += FIXP_2PI; |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 536 | |
Prashant Laddha | 4e30a37 | 2015-02-04 06:07:31 -0300 | [diff] [blame] | 537 | fixp_i = fixp_cos32_rad(dev->sdr_fixp_mod_phase, FIXP_2PI); |
| 538 | fixp_q = fixp_sin32_rad(dev->sdr_fixp_mod_phase, FIXP_2PI); |
| 539 | |
| 540 | /* Normalize fraction values represented with 32 bit precision |
| 541 | * to fixed point representation with FIXP_N bits */ |
| 542 | fixp_i >>= (31 - FIXP_N); |
| 543 | fixp_q >>= (31 - FIXP_N); |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 544 | |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 545 | switch (dev->sdr_pixelformat) { |
| 546 | case V4L2_SDR_FMT_CU8: |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 547 | /* convert 'fixp float' to u8 [0, +255] */ |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 548 | /* u8 = X * 127.5 + 127.5; X is float [-1.0, +1.0] */ |
| 549 | fixp_i = fixp_i * 1275 + FIXP_FRAC * 1275; |
| 550 | fixp_q = fixp_q * 1275 + FIXP_FRAC * 1275; |
| 551 | *vbuf++ = DIV_ROUND_CLOSEST(fixp_i, FIXP_FRAC * 10); |
| 552 | *vbuf++ = DIV_ROUND_CLOSEST(fixp_q, FIXP_FRAC * 10); |
| 553 | break; |
| 554 | case V4L2_SDR_FMT_CS8: |
Antti Palosaari | 60f6873 | 2015-09-01 20:04:51 -0300 | [diff] [blame] | 555 | /* convert 'fixp float' to s8 [-128, +127] */ |
| 556 | /* s8 = X * 127.5 - 0.5; X is float [-1.0, +1.0] */ |
| 557 | fixp_i = fixp_i * 1275 - FIXP_FRAC * 5; |
| 558 | fixp_q = fixp_q * 1275 - FIXP_FRAC * 5; |
Antti Palosaari | 7615f4b | 2015-05-17 08:34:37 -0300 | [diff] [blame] | 559 | *vbuf++ = DIV_ROUND_CLOSEST(fixp_i, FIXP_FRAC * 10); |
| 560 | *vbuf++ = DIV_ROUND_CLOSEST(fixp_q, FIXP_FRAC * 10); |
| 561 | break; |
| 562 | default: |
| 563 | break; |
| 564 | } |
Hans Verkuil | 6de8653 | 2014-08-25 08:03:32 -0300 | [diff] [blame] | 565 | } |
| 566 | } |