drivers/media/video/cx18/cx18-controls.c

   1 /*
   2  *  cx18 ioctl control functions
   3  *
   4  *  Derived from ivtv-controls.c
   5  *
   6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  21  *  02111-1307  USA
  22  */
  23
  24 #include "cx18-driver.h"
  25 #include "cx18-cards.h"
  26 #include "cx18-ioctl.h"
  27 #include "cx18-audio.h"
  28 #include "cx18-mailbox.h"
  29 #include "cx18-controls.h"
  30
  31 /* Must be sorted from low to high control ID! */
  32 static const u32 user_ctrls[] = {
  33         V4L2_CID_USER_CLASS,
  34         V4L2_CID_BRIGHTNESS,
  35         V4L2_CID_CONTRAST,
  36         V4L2_CID_SATURATION,
  37         V4L2_CID_HUE,
  38         V4L2_CID_AUDIO_VOLUME,
  39         V4L2_CID_AUDIO_BALANCE,
  40         V4L2_CID_AUDIO_BASS,
  41         V4L2_CID_AUDIO_TREBLE,
  42         V4L2_CID_AUDIO_MUTE,
  43         V4L2_CID_AUDIO_LOUDNESS,
  44         0
  45 };
  46
  47 static const u32 *ctrl_classes[] = {
  48         user_ctrls,
  49         cx2341x_mpeg_ctrls,
  50         NULL
  51 };
  52
  53 int cx18_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *qctrl)
  54 {
  55         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
  56         const char *name;
  57
  58         qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
  59         if (qctrl->id == 0)
  60                 return -EINVAL;
  61
  62         switch (qctrl->id) {
  63         /* Standard V4L2 controls */
  64         case V4L2_CID_BRIGHTNESS:
  65         case V4L2_CID_HUE:
  66         case V4L2_CID_SATURATION:
  67         case V4L2_CID_CONTRAST:
  68                 if (v4l2_subdev_call(cx->sd_av, core, queryctrl, qctrl))
  69                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  70                 return 0;
  71
  72         case V4L2_CID_AUDIO_VOLUME:
  73         case V4L2_CID_AUDIO_MUTE:
  74         case V4L2_CID_AUDIO_BALANCE:
  75         case V4L2_CID_AUDIO_BASS:
  76         case V4L2_CID_AUDIO_TREBLE:
  77         case V4L2_CID_AUDIO_LOUDNESS:
  78                 if (v4l2_subdev_call(cx->sd_av, core, queryctrl, qctrl))
  79                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  80                 return 0;
  81
  82         default:
  83                 if (cx2341x_ctrl_query(&cx->params, qctrl))
  84                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  85                 return 0;
  86         }
  87         strncpy(qctrl->name, name, sizeof(qctrl->name) - 1);
  88         qctrl->name[sizeof(qctrl->name) - 1] = 0;
  89         return 0;
  90 }
  91
  92 int cx18_querymenu(struct file *file, void *fh, struct v4l2_querymenu *qmenu)
  93 {
  94         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
  95         struct v4l2_queryctrl qctrl;
  96
  97         qctrl.id = qmenu->id;
  98         cx18_queryctrl(file, fh, &qctrl);
  99         return v4l2_ctrl_query_menu(qmenu, &qctrl,
 100                         cx2341x_ctrl_get_menu(&cx->params, qmenu->id));
 101 }
 102
 103 static int cx18_try_ctrl(struct file *file, void *fh,
 104                                         struct v4l2_ext_control *vctrl)
 105 {
 106         struct v4l2_queryctrl qctrl;
 107         const char **menu_items = NULL;
 108         int err;
 109
 110         qctrl.id = vctrl->id;
 111         err = cx18_queryctrl(file, fh, &qctrl);
 112         if (err)
 113                 return err;
 114         if (qctrl.type == V4L2_CTRL_TYPE_MENU)
 115                 menu_items = v4l2_ctrl_get_menu(qctrl.id);
 116         return v4l2_ctrl_check(vctrl, &qctrl, menu_items);
 117 }
 118
 119 static int cx18_s_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 120 {
 121         switch (vctrl->id) {
 122                 /* Standard V4L2 controls */
 123         case V4L2_CID_BRIGHTNESS:
 124         case V4L2_CID_HUE:
 125         case V4L2_CID_SATURATION:
 126         case V4L2_CID_CONTRAST:
 127                 return v4l2_subdev_call(cx->sd_av, core, s_ctrl, vctrl);
 128
 129         case V4L2_CID_AUDIO_VOLUME:
 130         case V4L2_CID_AUDIO_MUTE:
 131         case V4L2_CID_AUDIO_BALANCE:
 132         case V4L2_CID_AUDIO_BASS:
 133         case V4L2_CID_AUDIO_TREBLE:
 134         case V4L2_CID_AUDIO_LOUDNESS:
 135                 return v4l2_subdev_call(cx->sd_av, core, s_ctrl, vctrl);
 136
 137         default:
 138                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 139                 return -EINVAL;
 140         }
 141         return 0;
 142 }
 143
 144 static int cx18_g_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 145 {
 146         switch (vctrl->id) {
 147                 /* Standard V4L2 controls */
 148         case V4L2_CID_BRIGHTNESS:
 149         case V4L2_CID_HUE:
 150         case V4L2_CID_SATURATION:
 151         case V4L2_CID_CONTRAST:
 152                 return v4l2_subdev_call(cx->sd_av, core, g_ctrl, vctrl);
 153
 154         case V4L2_CID_AUDIO_VOLUME:
 155         case V4L2_CID_AUDIO_MUTE:
 156         case V4L2_CID_AUDIO_BALANCE:
 157         case V4L2_CID_AUDIO_BASS:
 158         case V4L2_CID_AUDIO_TREBLE:
 159         case V4L2_CID_AUDIO_LOUDNESS:
 160                 return v4l2_subdev_call(cx->sd_av, core, g_ctrl, vctrl);
 161
 162         default:
 163                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 164                 return -EINVAL;
 165         }
 166         return 0;
 167 }
 168
 169 static int cx18_setup_vbi_fmt(struct cx18 *cx,
 170                               enum v4l2_mpeg_stream_vbi_fmt fmt,
 171                               enum v4l2_mpeg_stream_type type)
 172 {
 173         if (!(cx->v4l2_cap & V4L2_CAP_SLICED_VBI_CAPTURE))
 174                 return -EINVAL;
 175         if (atomic_read(&cx->ana_capturing) > 0)
 176                 return -EBUSY;
 177
 178         if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
 179             type != V4L2_MPEG_STREAM_TYPE_MPEG2_PS) {
 180                 /* We don't do VBI insertion aside from IVTV format in a PS */
 181                 cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
 182                 CX18_DEBUG_INFO("disabled insertion of sliced VBI data into "
 183                                 "the MPEG stream\n");
 184                 return 0;
 185         }
 186
 187         /* Allocate sliced VBI buffers if needed. */
 188         if (cx->vbi.sliced_mpeg_data[0] == NULL) {
 189                 int i;
 190
 191                 for (i = 0; i < CX18_VBI_FRAMES; i++) {
 192                         cx->vbi.sliced_mpeg_data[i] =
 193                                kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
 194                         if (cx->vbi.sliced_mpeg_data[i] == NULL) {
 195                                 while (--i >= 0) {
 196                                         kfree(cx->vbi.sliced_mpeg_data[i]);
 197                                         cx->vbi.sliced_mpeg_data[i] = NULL;
 198                                 }
 199                                 cx->vbi.insert_mpeg =
 200                                                   V4L2_MPEG_STREAM_VBI_FMT_NONE;
 201                                 CX18_WARN("Unable to allocate buffers for "
 202                                           "sliced VBI data insertion\n");
 203                                 return -ENOMEM;
 204                         }
 205                 }
 206         }
 207
 208         cx->vbi.insert_mpeg = fmt;
 209         CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,"
 210                         "when sliced VBI is enabled\n");
 211
 212         /*
 213          * If our current settings have no lines set for capture, store a valid,
 214          * default set of service lines to capture, in our current settings.
 215          */
 216         if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
 217                 if (cx->is_60hz)
 218                         cx->vbi.sliced_in->service_set =
 219                                                         V4L2_SLICED_CAPTION_525;
 220                 else
 221                         cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
 222                 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
 223         }
 224         return 0;
 225 }
 226
 227 int cx18_g_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 228 {
 229         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 230         struct v4l2_control ctrl;
 231
 232         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 233                 int i;
 234                 int err = 0;
 235
 236                 for (i = 0; i < c->count; i++) {
 237                         ctrl.id = c->controls[i].id;
 238                         ctrl.value = c->controls[i].value;
 239                         err = cx18_g_ctrl(cx, &ctrl);
 240                         c->controls[i].value = ctrl.value;
 241                         if (err) {
 242                                 c->error_idx = i;
 243                                 break;
 244                         }
 245                 }
 246                 return err;
 247         }
 248         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 249                 return cx2341x_ext_ctrls(&cx->params, 0, c, VIDIOC_G_EXT_CTRLS);
 250         return -EINVAL;
 251 }
 252
 253 int cx18_s_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 254 {
 255         struct cx18_open_id *id = fh;
 256         struct cx18 *cx = id->cx;
 257         int ret;
 258         struct v4l2_control ctrl;
 259
 260         ret = v4l2_prio_check(&cx->prio, &id->prio);
 261         if (ret)
 262                 return ret;
 263
 264         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 265                 int i;
 266                 int err = 0;
 267
 268                 for (i = 0; i < c->count; i++) {
 269                         ctrl.id = c->controls[i].id;
 270                         ctrl.value = c->controls[i].value;
 271                         err = cx18_s_ctrl(cx, &ctrl);
 272                         c->controls[i].value = ctrl.value;
 273                         if (err) {
 274                                 c->error_idx = i;
 275                                 break;
 276                         }
 277                 }
 278                 return err;
 279         }
 280         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
 281                 static u32 freqs[3] = { 44100, 48000, 32000 };
 282                 struct cx18_api_func_private priv;
 283                 struct cx2341x_mpeg_params p = cx->params;
 284                 int err = cx2341x_ext_ctrls(&p, atomic_read(&cx->ana_capturing),
 285                                                 c, VIDIOC_S_EXT_CTRLS);
 286                 unsigned int idx;
 287
 288                 if (err)
 289                         return err;
 290
 291                 if (p.video_encoding != cx->params.video_encoding) {
 292                         int is_mpeg1 = p.video_encoding ==
 293                                                 V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
 294                         struct v4l2_format fmt;
 295
 296                         /* fix videodecoder resolution */
 297                         fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 298                         fmt.fmt.pix.width = cx->params.width
 299                                                 / (is_mpeg1 ? 2 : 1);
 300                         fmt.fmt.pix.height = cx->params.height;
 301                         v4l2_subdev_call(cx->sd_av, video, s_fmt, &fmt);
 302                 }
 303                 priv.cx = cx;
 304                 priv.s = &cx->streams[id->type];
 305                 err = cx2341x_update(&priv, cx18_api_func, &cx->params, &p);
 306                 if (!err &&
 307                     (cx->params.stream_vbi_fmt != p.stream_vbi_fmt ||
 308                      cx->params.stream_type != p.stream_type))
 309                         err = cx18_setup_vbi_fmt(cx, p.stream_vbi_fmt,
 310                                                  p.stream_type);
 311                 cx->params = p;
 312                 cx->dualwatch_stereo_mode = p.audio_properties & 0x0300;
 313                 idx = p.audio_properties & 0x03;
 314                 /* The audio clock of the digitizer must match the codec sample
 315                    rate otherwise you get some very strange effects. */
 316                 if (idx < sizeof(freqs))
 317                         cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
 318                 return err;
 319         }
 320         return -EINVAL;
 321 }
 322
 323 int cx18_try_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 324 {
 325         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 326
 327         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 328                 int i;
 329                 int err = 0;
 330
 331                 for (i = 0; i < c->count; i++) {
 332                         err = cx18_try_ctrl(file, fh, &c->controls[i]);
 333                         if (err) {
 334                                 c->error_idx = i;
 335                                 break;
 336                         }
 337                 }
 338                 return err;
 339         }
 340         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 341                 return cx2341x_ext_ctrls(&cx->params,
 342                                                 atomic_read(&cx->ana_capturing),
 343                                                 c, VIDIOC_TRY_EXT_CTRLS);
 344         return -EINVAL;
 345 }