LXR linux/drivers/media/platform/vivid/vivid-sdr-cap.c

   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>
  25#include <linux/math64.h>
  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>
  31#include <linux/fixp-arith.h>
  32
  33#include "vivid-core.h"
  34#include "vivid-ctrls.h"
  35#include "vivid-sdr-cap.h"
  36
  37/* stream formats */
  38struct vivid_format {
  39        u32     pixelformat;
  40        u32     buffersize;
  41};
  42
  43/* format descriptions for capture and preview */
  44static const struct vivid_format formats[] = {
  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
  54static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  55
  56static const struct v4l2_frequency_band bands_adc[] = {
  57        {
  58                .tuner = 0,
  59                .type = V4L2_TUNER_ADC,
  60                .index = 0,
  61                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  62                .rangelow   =  300000,
  63                .rangehigh  =  300000,
  64        },
  65        {
  66                .tuner = 0,
  67                .type = V4L2_TUNER_ADC,
  68                .index = 1,
  69                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  70                .rangelow   =  900001,
  71                .rangehigh  = 2800000,
  72        },
  73        {
  74                .tuner = 0,
  75                .type = V4L2_TUNER_ADC,
  76                .index = 2,
  77                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  78                .rangelow   = 3200000,
  79                .rangehigh  = 3200000,
  80        },
  81};
  82
  83/* ADC band midpoints */
  84#define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
  85#define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
  86
  87static const struct v4l2_frequency_band bands_fm[] = {
  88        {
  89                .tuner = 1,
  90                .type = V4L2_TUNER_RF,
  91                .index = 0,
  92                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  93                .rangelow   =    50000000,
  94                .rangehigh  =  2000000000,
  95        },
  96};
  97
  98static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev)
  99{
 100        struct vivid_buffer *sdr_cap_buf = NULL;
 101
 102        dprintk(dev, 1, "SDR Capture Thread Tick\n");
 103
 104        /* Drop a certain percentage of buffers. */
 105        if (dev->perc_dropped_buffers &&
 106            prandom_u32_max(100) < dev->perc_dropped_buffers)
 107                return;
 108
 109        spin_lock(&dev->slock);
 110        if (!list_empty(&dev->sdr_cap_active)) {
 111                sdr_cap_buf = list_entry(dev->sdr_cap_active.next,
 112                                         struct vivid_buffer, list);
 113                list_del(&sdr_cap_buf->list);
 114        }
 115        spin_unlock(&dev->slock);
 116
 117        if (sdr_cap_buf) {
 118                sdr_cap_buf->vb.sequence = dev->sdr_cap_seq_count;
 119                vivid_sdr_cap_process(dev, sdr_cap_buf);
 120                sdr_cap_buf->vb.vb2_buf.timestamp =
 121                        ktime_get_ns() + dev->time_wrap_offset;
 122                vb2_buffer_done(&sdr_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
 123                                VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 124                dev->dqbuf_error = false;
 125        }
 126}
 127
 128static int vivid_thread_sdr_cap(void *data)
 129{
 130        struct vivid_dev *dev = data;
 131        u64 samples_since_start;
 132        u64 buffers_since_start;
 133        u64 next_jiffies_since_start;
 134        unsigned long jiffies_since_start;
 135        unsigned long cur_jiffies;
 136        unsigned wait_jiffies;
 137
 138        dprintk(dev, 1, "SDR Capture Thread Start\n");
 139
 140        set_freezable();
 141
 142        /* Resets frame counters */
 143        dev->sdr_cap_seq_offset = 0;
 144        if (dev->seq_wrap)
 145                dev->sdr_cap_seq_offset = 0xffffff80U;
 146        dev->jiffies_sdr_cap = jiffies;
 147        dev->sdr_cap_seq_resync = false;
 148
 149        for (;;) {
 150                try_to_freeze();
 151                if (kthread_should_stop())
 152                        break;
 153
 154                mutex_lock(&dev->mutex);
 155                cur_jiffies = jiffies;
 156                if (dev->sdr_cap_seq_resync) {
 157                        dev->jiffies_sdr_cap = cur_jiffies;
 158                        dev->sdr_cap_seq_offset = dev->sdr_cap_seq_count + 1;
 159                        dev->sdr_cap_seq_count = 0;
 160                        dev->sdr_cap_seq_resync = false;
 161                }
 162                /* Calculate the number of jiffies since we started streaming */
 163                jiffies_since_start = cur_jiffies - dev->jiffies_sdr_cap;
 164                /* Get the number of buffers streamed since the start */
 165                buffers_since_start =
 166                        (u64)jiffies_since_start * dev->sdr_adc_freq +
 167                                      (HZ * SDR_CAP_SAMPLES_PER_BUF) / 2;
 168                do_div(buffers_since_start, HZ * SDR_CAP_SAMPLES_PER_BUF);
 169
 170                /*
 171                 * After more than 0xf0000000 (rounded down to a multiple of
 172                 * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
 173                 * jiffies have passed since we started streaming reset the
 174                 * counters and keep track of the sequence offset.
 175                 */
 176                if (jiffies_since_start > JIFFIES_RESYNC) {
 177                        dev->jiffies_sdr_cap = cur_jiffies;
 178                        dev->sdr_cap_seq_offset = buffers_since_start;
 179                        buffers_since_start = 0;
 180                }
 181                dev->sdr_cap_seq_count =
 182                        buffers_since_start + dev->sdr_cap_seq_offset;
 183
 184                vivid_thread_sdr_cap_tick(dev);
 185                mutex_unlock(&dev->mutex);
 186
 187                /*
 188                 * Calculate the number of samples streamed since we started,
 189                 * not including the current buffer.
 190                 */
 191                samples_since_start = buffers_since_start * SDR_CAP_SAMPLES_PER_BUF;
 192
 193                /* And the number of jiffies since we started */
 194                jiffies_since_start = jiffies - dev->jiffies_sdr_cap;
 195
 196                /* Increase by the number of samples in one buffer */
 197                samples_since_start += SDR_CAP_SAMPLES_PER_BUF;
 198                /*
 199                 * Calculate when that next buffer is supposed to start
 200                 * in jiffies since we started streaming.
 201                 */
 202                next_jiffies_since_start = samples_since_start * HZ +
 203                                           dev->sdr_adc_freq / 2;
 204                do_div(next_jiffies_since_start, dev->sdr_adc_freq);
 205                /* If it is in the past, then just schedule asap */
 206                if (next_jiffies_since_start < jiffies_since_start)
 207                        next_jiffies_since_start = jiffies_since_start;
 208
 209                wait_jiffies = next_jiffies_since_start - jiffies_since_start;
 210                schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1);
 211        }
 212        dprintk(dev, 1, "SDR Capture Thread End\n");
 213        return 0;
 214}
 215
 216static int sdr_cap_queue_setup(struct vb2_queue *vq,
 217                       unsigned *nbuffers, unsigned *nplanes,
 218                       unsigned sizes[], void *alloc_ctxs[])
 219{
 220        /* 2 = max 16-bit sample returned */
 221        sizes[0] = SDR_CAP_SAMPLES_PER_BUF * 2;
 222        *nplanes = 1;
 223        return 0;
 224}
 225
 226static int sdr_cap_buf_prepare(struct vb2_buffer *vb)
 227{
 228        struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 229        unsigned size = SDR_CAP_SAMPLES_PER_BUF * 2;
 230
 231        dprintk(dev, 1, "%s\n", __func__);
 232
 233        if (dev->buf_prepare_error) {
 234                /*
 235                 * Error injection: test what happens if buf_prepare() returns
 236                 * an error.
 237                 */
 238                dev->buf_prepare_error = false;
 239                return -EINVAL;
 240        }
 241        if (vb2_plane_size(vb, 0) < size) {
 242                dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
 243                                __func__, vb2_plane_size(vb, 0), size);
 244                return -EINVAL;
 245        }
 246        vb2_set_plane_payload(vb, 0, size);
 247
 248        return 0;
 249}
 250
 251static void sdr_cap_buf_queue(struct vb2_buffer *vb)
 252{
 253        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 254        struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 255        struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
 256
 257        dprintk(dev, 1, "%s\n", __func__);
 258
 259        spin_lock(&dev->slock);
 260        list_add_tail(&buf->list, &dev->sdr_cap_active);
 261        spin_unlock(&dev->slock);
 262}
 263
 264static int sdr_cap_start_streaming(struct vb2_queue *vq, unsigned count)
 265{
 266        struct vivid_dev *dev = vb2_get_drv_priv(vq);
 267        int err = 0;
 268
 269        dprintk(dev, 1, "%s\n", __func__);
 270        dev->sdr_cap_seq_count = 0;
 271        if (dev->start_streaming_error) {
 272                dev->start_streaming_error = false;
 273                err = -EINVAL;
 274        } else if (dev->kthread_sdr_cap == NULL) {
 275                dev->kthread_sdr_cap = kthread_run(vivid_thread_sdr_cap, dev,
 276                                "%s-sdr-cap", dev->v4l2_dev.name);
 277
 278                if (IS_ERR(dev->kthread_sdr_cap)) {
 279                        v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
 280                        err = PTR_ERR(dev->kthread_sdr_cap);
 281                        dev->kthread_sdr_cap = NULL;
 282                }
 283        }
 284        if (err) {
 285                struct vivid_buffer *buf, *tmp;
 286
 287                list_for_each_entry_safe(buf, tmp, &dev->sdr_cap_active, list) {
 288                        list_del(&buf->list);
 289                        vb2_buffer_done(&buf->vb.vb2_buf,
 290                                        VB2_BUF_STATE_QUEUED);
 291                }
 292        }
 293        return err;
 294}
 295
 296/* abort streaming and wait for last buffer */
 297static void sdr_cap_stop_streaming(struct vb2_queue *vq)
 298{
 299        struct vivid_dev *dev = vb2_get_drv_priv(vq);
 300
 301        if (dev->kthread_sdr_cap == NULL)
 302                return;
 303
 304        while (!list_empty(&dev->sdr_cap_active)) {
 305                struct vivid_buffer *buf;
 306
 307                buf = list_entry(dev->sdr_cap_active.next,
 308                                struct vivid_buffer, list);
 309                list_del(&buf->list);
 310                vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 311        }
 312
 313        /* shutdown control thread */
 314        mutex_unlock(&dev->mutex);
 315        kthread_stop(dev->kthread_sdr_cap);
 316        dev->kthread_sdr_cap = NULL;
 317        mutex_lock(&dev->mutex);
 318}
 319
 320const struct vb2_ops vivid_sdr_cap_qops = {
 321        .queue_setup            = sdr_cap_queue_setup,
 322        .buf_prepare            = sdr_cap_buf_prepare,
 323        .buf_queue              = sdr_cap_buf_queue,
 324        .start_streaming        = sdr_cap_start_streaming,
 325        .stop_streaming         = sdr_cap_stop_streaming,
 326        .wait_prepare           = vb2_ops_wait_prepare,
 327        .wait_finish            = vb2_ops_wait_finish,
 328};
 329
 330int vivid_sdr_enum_freq_bands(struct file *file, void *fh,
 331                struct v4l2_frequency_band *band)
 332{
 333        switch (band->tuner) {
 334        case 0:
 335                if (band->index >= ARRAY_SIZE(bands_adc))
 336                        return -EINVAL;
 337                *band = bands_adc[band->index];
 338                return 0;
 339        case 1:
 340                if (band->index >= ARRAY_SIZE(bands_fm))
 341                        return -EINVAL;
 342                *band = bands_fm[band->index];
 343                return 0;
 344        default:
 345                return -EINVAL;
 346        }
 347}
 348
 349int vivid_sdr_g_frequency(struct file *file, void *fh,
 350                struct v4l2_frequency *vf)
 351{
 352        struct vivid_dev *dev = video_drvdata(file);
 353
 354        switch (vf->tuner) {
 355        case 0:
 356                vf->frequency = dev->sdr_adc_freq;
 357                vf->type = V4L2_TUNER_ADC;
 358                return 0;
 359        case 1:
 360                vf->frequency = dev->sdr_fm_freq;
 361                vf->type = V4L2_TUNER_RF;
 362                return 0;
 363        default:
 364                return -EINVAL;
 365        }
 366}
 367
 368int vivid_sdr_s_frequency(struct file *file, void *fh,
 369                const struct v4l2_frequency *vf)
 370{
 371        struct vivid_dev *dev = video_drvdata(file);
 372        unsigned freq = vf->frequency;
 373        unsigned band;
 374
 375        switch (vf->tuner) {
 376        case 0:
 377                if (vf->type != V4L2_TUNER_ADC)
 378                        return -EINVAL;
 379                if (freq < BAND_ADC_0)
 380                        band = 0;
 381                else if (freq < BAND_ADC_1)
 382                        band = 1;
 383                else
 384                        band = 2;
 385
 386                freq = clamp_t(unsigned, freq,
 387                                bands_adc[band].rangelow,
 388                                bands_adc[band].rangehigh);
 389
 390                if (vb2_is_streaming(&dev->vb_sdr_cap_q) &&
 391                    freq != dev->sdr_adc_freq) {
 392                        /* resync the thread's timings */
 393                        dev->sdr_cap_seq_resync = true;
 394                }
 395                dev->sdr_adc_freq = freq;
 396                return 0;
 397        case 1:
 398                if (vf->type != V4L2_TUNER_RF)
 399                        return -EINVAL;
 400                dev->sdr_fm_freq = clamp_t(unsigned, freq,
 401                                bands_fm[0].rangelow,
 402                                bands_fm[0].rangehigh);
 403                return 0;
 404        default:
 405                return -EINVAL;
 406        }
 407}
 408
 409int vivid_sdr_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
 410{
 411        switch (vt->index) {
 412        case 0:
 413                strlcpy(vt->name, "ADC", sizeof(vt->name));
 414                vt->type = V4L2_TUNER_ADC;
 415                vt->capability =
 416                        V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 417                vt->rangelow = bands_adc[0].rangelow;
 418                vt->rangehigh = bands_adc[2].rangehigh;
 419                return 0;
 420        case 1:
 421                strlcpy(vt->name, "RF", sizeof(vt->name));
 422                vt->type = V4L2_TUNER_RF;
 423                vt->capability =
 424                        V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 425                vt->rangelow = bands_fm[0].rangelow;
 426                vt->rangehigh = bands_fm[0].rangehigh;
 427                return 0;
 428        default:
 429                return -EINVAL;
 430        }
 431}
 432
 433int vivid_sdr_s_tuner(struct file *file, void *fh, const struct v4l2_tuner *vt)
 434{
 435        if (vt->index > 1)
 436                return -EINVAL;
 437        return 0;
 438}
 439
 440int vidioc_enum_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 441{
 442        if (f->index >= ARRAY_SIZE(formats))
 443                return -EINVAL;
 444        f->pixelformat = formats[f->index].pixelformat;
 445        return 0;
 446}
 447
 448int vidioc_g_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f)
 449{
 450        struct vivid_dev *dev = video_drvdata(file);
 451
 452        f->fmt.sdr.pixelformat = dev->sdr_pixelformat;
 453        f->fmt.sdr.buffersize = dev->sdr_buffersize;
 454        memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 455        return 0;
 456}
 457
 458int vidioc_s_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f)
 459{
 460        struct vivid_dev *dev = video_drvdata(file);
 461        struct vb2_queue *q = &dev->vb_sdr_cap_q;
 462        int i;
 463
 464        if (vb2_is_busy(q))
 465                return -EBUSY;
 466
 467        memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 468        for (i = 0; i < ARRAY_SIZE(formats); i++) {
 469                if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 470                        dev->sdr_pixelformat = formats[i].pixelformat;
 471                        dev->sdr_buffersize = formats[i].buffersize;
 472                        f->fmt.sdr.buffersize = formats[i].buffersize;
 473                        return 0;
 474                }
 475        }
 476        dev->sdr_pixelformat = formats[0].pixelformat;
 477        dev->sdr_buffersize = formats[0].buffersize;
 478        f->fmt.sdr.pixelformat = formats[0].pixelformat;
 479        f->fmt.sdr.buffersize = formats[0].buffersize;
 480        return 0;
 481}
 482
 483int vidioc_try_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f)
 484{
 485        int i;
 486
 487        memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 488        for (i = 0; i < ARRAY_SIZE(formats); i++) {
 489                if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 490                        f->fmt.sdr.buffersize = formats[i].buffersize;
 491                        return 0;
 492                }
 493        }
 494        f->fmt.sdr.pixelformat = formats[0].pixelformat;
 495        f->fmt.sdr.buffersize = formats[0].buffersize;
 496        return 0;
 497}
 498
 499#define FIXP_N    (15)
 500#define FIXP_FRAC (1 << FIXP_N)
 501#define FIXP_2PI  ((int)(2 * 3.141592653589 * FIXP_FRAC))
 502#define M_100000PI (3.14159 * 100000)
 503
 504void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
 505{
 506        u8 *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 507        unsigned long i;
 508        unsigned long plane_size = vb2_plane_size(&buf->vb.vb2_buf, 0);
 509        s64 s64tmp;
 510        s32 src_phase_step;
 511        s32 mod_phase_step;
 512        s32 fixp_i;
 513        s32 fixp_q;
 514
 515        /* calculate phase step */
 516        #define BEEP_FREQ 1000 /* 1kHz beep */
 517        src_phase_step = DIV_ROUND_CLOSEST(FIXP_2PI * BEEP_FREQ,
 518                                           dev->sdr_adc_freq);
 519
 520        for (i = 0; i < plane_size; i += 2) {
 521                mod_phase_step = fixp_cos32_rad(dev->sdr_fixp_src_phase,
 522                                                FIXP_2PI) >> (31 - FIXP_N);
 523
 524                dev->sdr_fixp_src_phase += src_phase_step;
 525                s64tmp = (s64) mod_phase_step * dev->sdr_fm_deviation;
 526                dev->sdr_fixp_mod_phase += div_s64(s64tmp, M_100000PI);
 527
 528                /*
 529                 * Transfer phase angle to [0, 2xPI] in order to avoid variable
 530                 * overflow and make it suitable for cosine implementation
 531                 * used, which does not support negative angles.
 532                 */
 533                dev->sdr_fixp_src_phase %= FIXP_2PI;
 534                dev->sdr_fixp_mod_phase %= FIXP_2PI;
 535
 536                if (dev->sdr_fixp_mod_phase < 0)
 537                        dev->sdr_fixp_mod_phase += FIXP_2PI;
 538
 539                fixp_i = fixp_cos32_rad(dev->sdr_fixp_mod_phase, FIXP_2PI);
 540                fixp_q = fixp_sin32_rad(dev->sdr_fixp_mod_phase, FIXP_2PI);
 541
 542                /* Normalize fraction values represented with 32 bit precision
 543                 * to fixed point representation with FIXP_N bits */
 544                fixp_i >>= (31 - FIXP_N);
 545                fixp_q >>= (31 - FIXP_N);
 546
 547                switch (dev->sdr_pixelformat) {
 548                case V4L2_SDR_FMT_CU8:
 549                        /* convert 'fixp float' to u8 [0, +255] */
 550                        /* u8 = X * 127.5 + 127.5; X is float [-1.0, +1.0] */
 551                        fixp_i = fixp_i * 1275 + FIXP_FRAC * 1275;
 552                        fixp_q = fixp_q * 1275 + FIXP_FRAC * 1275;
 553                        *vbuf++ = DIV_ROUND_CLOSEST(fixp_i, FIXP_FRAC * 10);
 554                        *vbuf++ = DIV_ROUND_CLOSEST(fixp_q, FIXP_FRAC * 10);
 555                        break;
 556                case V4L2_SDR_FMT_CS8:
 557                        /* convert 'fixp float' to s8 [-128, +127] */
 558                        /* s8 = X * 127.5 - 0.5; X is float [-1.0, +1.0] */
 559                        fixp_i = fixp_i * 1275 - FIXP_FRAC * 5;
 560                        fixp_q = fixp_q * 1275 - FIXP_FRAC * 5;
 561                        *vbuf++ = DIV_ROUND_CLOSEST(fixp_i, FIXP_FRAC * 10);
 562                        *vbuf++ = DIV_ROUND_CLOSEST(fixp_q, FIXP_FRAC * 10);
 563                        break;
 564                default:
 565                        break;
 566                }
 567        }
 568}
 569