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_USER_CLASS:
  65                 return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0);
  66         case V4L2_CID_BRIGHTNESS:
  67         case V4L2_CID_HUE:
  68         case V4L2_CID_SATURATION:
  69         case V4L2_CID_CONTRAST:
  70                 if (v4l2_subdev_call(cx->sd_av, core, queryctrl, qctrl))
  71                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  72                 return 0;
  73
  74         case V4L2_CID_AUDIO_VOLUME:
  75         case V4L2_CID_AUDIO_MUTE:
  76         case V4L2_CID_AUDIO_BALANCE:
  77         case V4L2_CID_AUDIO_BASS:
  78         case V4L2_CID_AUDIO_TREBLE:
  79         case V4L2_CID_AUDIO_LOUDNESS:
  80                 if (v4l2_subdev_call(cx->sd_av, core, queryctrl, qctrl))
  81                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  82                 return 0;
  83
  84         default:
  85                 if (cx2341x_ctrl_query(&cx->params, qctrl))
  86                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  87                 return 0;
  88         }
  89         strncpy(qctrl->name, name, sizeof(qctrl->name) - 1);
  90         qctrl->name[sizeof(qctrl->name) - 1] = 0;
  91         return 0;
  92 }
  93
  94 int cx18_querymenu(struct file *file, void *fh, struct v4l2_querymenu *qmenu)
  95 {
  96         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
  97         struct v4l2_queryctrl qctrl;
  98
  99         qctrl.id = qmenu->id;
 100         cx18_queryctrl(file, fh, &qctrl);
 101         return v4l2_ctrl_query_menu(qmenu, &qctrl,
 102                         cx2341x_ctrl_get_menu(&cx->params, qmenu->id));
 103 }
 104
 105 static int cx18_try_ctrl(struct file *file, void *fh,
 106                                         struct v4l2_ext_control *vctrl)
 107 {
 108         struct v4l2_queryctrl qctrl;
 109         const char **menu_items = NULL;
 110         int err;
 111
 112         qctrl.id = vctrl->id;
 113         err = cx18_queryctrl(file, fh, &qctrl);
 114         if (err)
 115                 return err;
 116         if (qctrl.type == V4L2_CTRL_TYPE_MENU)
 117                 menu_items = v4l2_ctrl_get_menu(qctrl.id);
 118         return v4l2_ctrl_check(vctrl, &qctrl, menu_items);
 119 }
 120
 121 static int cx18_s_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 122 {
 123         switch (vctrl->id) {
 124                 /* Standard V4L2 controls */
 125         case V4L2_CID_BRIGHTNESS:
 126         case V4L2_CID_HUE:
 127         case V4L2_CID_SATURATION:
 128         case V4L2_CID_CONTRAST:
 129                 return v4l2_subdev_call(cx->sd_av, core, s_ctrl, vctrl);
 130
 131         case V4L2_CID_AUDIO_VOLUME:
 132         case V4L2_CID_AUDIO_MUTE:
 133         case V4L2_CID_AUDIO_BALANCE:
 134         case V4L2_CID_AUDIO_BASS:
 135         case V4L2_CID_AUDIO_TREBLE:
 136         case V4L2_CID_AUDIO_LOUDNESS:
 137                 return v4l2_subdev_call(cx->sd_av, core, s_ctrl, vctrl);
 138
 139         default:
 140                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 141                 return -EINVAL;
 142         }
 143         return 0;
 144 }
 145
 146 static int cx18_g_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 147 {
 148         switch (vctrl->id) {
 149                 /* Standard V4L2 controls */
 150         case V4L2_CID_BRIGHTNESS:
 151         case V4L2_CID_HUE:
 152         case V4L2_CID_SATURATION:
 153         case V4L2_CID_CONTRAST:
 154                 return v4l2_subdev_call(cx->sd_av, core, g_ctrl, vctrl);
 155
 156         case V4L2_CID_AUDIO_VOLUME:
 157         case V4L2_CID_AUDIO_MUTE:
 158         case V4L2_CID_AUDIO_BALANCE:
 159         case V4L2_CID_AUDIO_BASS:
 160         case V4L2_CID_AUDIO_TREBLE:
 161         case V4L2_CID_AUDIO_LOUDNESS:
 162                 return v4l2_subdev_call(cx->sd_av, core, g_ctrl, vctrl);
 163
 164         default:
 165                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 166                 return -EINVAL;
 167         }
 168         return 0;
 169 }
 170
 171 static int cx18_setup_vbi_fmt(struct cx18 *cx,
 172                               enum v4l2_mpeg_stream_vbi_fmt fmt,
 173                               enum v4l2_mpeg_stream_type type)
 174 {
 175         if (!(cx->v4l2_cap & V4L2_CAP_SLICED_VBI_CAPTURE))
 176                 return -EINVAL;
 177         if (atomic_read(&cx->ana_capturing) > 0)
 178                 return -EBUSY;
 179
 180         if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
 181             !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
 182               type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
 183               type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) {
 184                 /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
 185                 cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
 186                 CX18_DEBUG_INFO("disabled insertion of sliced VBI data into "
 187                                 "the MPEG stream\n");
 188                 return 0;
 189         }
 190
 191         /* Allocate sliced VBI buffers if needed. */
 192         if (cx->vbi.sliced_mpeg_data[0] == NULL) {
 193                 int i;
 194
 195                 for (i = 0; i < CX18_VBI_FRAMES; i++) {
 196                         cx->vbi.sliced_mpeg_data[i] =
 197                                kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
 198                         if (cx->vbi.sliced_mpeg_data[i] == NULL) {
 199                                 while (--i >= 0) {
 200                                         kfree(cx->vbi.sliced_mpeg_data[i]);
 201                                         cx->vbi.sliced_mpeg_data[i] = NULL;
 202                                 }
 203                                 cx->vbi.insert_mpeg =
 204                                                   V4L2_MPEG_STREAM_VBI_FMT_NONE;
 205                                 CX18_WARN("Unable to allocate buffers for "
 206                                           "sliced VBI data insertion\n");
 207                                 return -ENOMEM;
 208                         }
 209                 }
 210         }
 211
 212         cx->vbi.insert_mpeg = fmt;
 213         CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,"
 214                         "when sliced VBI is enabled\n");
 215
 216         /*
 217          * If our current settings have no lines set for capture, store a valid,
 218          * default set of service lines to capture, in our current settings.
 219          */
 220         if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
 221                 if (cx->is_60hz)
 222                         cx->vbi.sliced_in->service_set =
 223                                                         V4L2_SLICED_CAPTION_525;
 224                 else
 225                         cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
 226                 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
 227         }
 228         return 0;
 229 }
 230
 231 int cx18_g_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 232 {
 233         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 234         struct v4l2_control ctrl;
 235
 236         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 237                 int i;
 238                 int err = 0;
 239
 240                 for (i = 0; i < c->count; i++) {
 241                         ctrl.id = c->controls[i].id;
 242                         ctrl.value = c->controls[i].value;
 243                         err = cx18_g_ctrl(cx, &ctrl);
 244                         c->controls[i].value = ctrl.value;
 245                         if (err) {
 246                                 c->error_idx = i;
 247                                 break;
 248                         }
 249                 }
 250                 return err;
 251         }
 252         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 253                 return cx2341x_ext_ctrls(&cx->params, 0, c, VIDIOC_G_EXT_CTRLS);
 254         return -EINVAL;
 255 }
 256
 257 int cx18_s_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 258 {
 259         struct cx18_open_id *id = fh;
 260         struct cx18 *cx = id->cx;
 261         int ret;
 262         struct v4l2_control ctrl;
 263
 264         ret = v4l2_prio_check(&cx->prio, &id->prio);
 265         if (ret)
 266                 return ret;
 267
 268         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 269                 int i;
 270                 int err = 0;
 271
 272                 for (i = 0; i < c->count; i++) {
 273                         ctrl.id = c->controls[i].id;
 274                         ctrl.value = c->controls[i].value;
 275                         err = cx18_s_ctrl(cx, &ctrl);
 276                         c->controls[i].value = ctrl.value;
 277                         if (err) {
 278                                 c->error_idx = i;
 279                                 break;
 280                         }
 281                 }
 282                 return err;
 283         }
 284         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
 285                 static u32 freqs[3] = { 44100, 48000, 32000 };
 286                 struct cx18_api_func_private priv;
 287                 struct cx2341x_mpeg_params p = cx->params;
 288                 int err = cx2341x_ext_ctrls(&p, atomic_read(&cx->ana_capturing),
 289                                                 c, VIDIOC_S_EXT_CTRLS);
 290                 unsigned int idx;
 291
 292                 if (err)
 293                         return err;
 294
 295                 if (p.video_encoding != cx->params.video_encoding) {
 296                         int is_mpeg1 = p.video_encoding ==
 297                                                 V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
 298                         struct v4l2_format fmt;
 299
 300                         /* fix videodecoder resolution */
 301                         fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 302                         fmt.fmt.pix.width = cx->params.width
 303                                                 / (is_mpeg1 ? 2 : 1);
 304                         fmt.fmt.pix.height = cx->params.height;
 305                         v4l2_subdev_call(cx->sd_av, video, s_fmt, &fmt);
 306                 }
 307                 priv.cx = cx;
 308                 priv.s = &cx->streams[id->type];
 309                 err = cx2341x_update(&priv, cx18_api_func, &cx->params, &p);
 310                 if (!err &&
 311                     (cx->params.stream_vbi_fmt != p.stream_vbi_fmt ||
 312                      cx->params.stream_type != p.stream_type))
 313                         err = cx18_setup_vbi_fmt(cx, p.stream_vbi_fmt,
 314                                                  p.stream_type);
 315                 cx->params = p;
 316                 cx->dualwatch_stereo_mode = p.audio_properties & 0x0300;
 317                 idx = p.audio_properties & 0x03;
 318                 /* The audio clock of the digitizer must match the codec sample
 319                    rate otherwise you get some very strange effects. */
 320                 if (idx < sizeof(freqs))
 321                         cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
 322                 return err;
 323         }
 324         return -EINVAL;
 325 }
 326
 327 int cx18_try_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 328 {
 329         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 330
 331         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 332                 int i;
 333                 int err = 0;
 334
 335                 for (i = 0; i < c->count; i++) {
 336                         err = cx18_try_ctrl(file, fh, &c->controls[i]);
 337                         if (err) {
 338                                 c->error_idx = i;
 339                                 break;
 340                         }
 341                 }
 342                 return err;
 343         }
 344         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 345                 return cx2341x_ext_ctrls(&cx->params,
 346                                                 atomic_read(&cx->ana_capturing),
 347                                                 c, VIDIOC_TRY_EXT_CTRLS);
 348         return -EINVAL;
 349 }