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 #include <linux/kernel.h>
  24
  25 #include "cx18-driver.h"
  26 #include "cx18-cards.h"
  27 #include "cx18-ioctl.h"
  28 #include "cx18-audio.h"
  29 #include "cx18-mailbox.h"
  30 #include "cx18-controls.h"
  31
  32 /* Must be sorted from low to high control ID! */
  33 static const u32 user_ctrls[] = {
  34         V4L2_CID_USER_CLASS,
  35         V4L2_CID_BRIGHTNESS,
  36         V4L2_CID_CONTRAST,
  37         V4L2_CID_SATURATION,
  38         V4L2_CID_HUE,
  39         V4L2_CID_AUDIO_VOLUME,
  40         V4L2_CID_AUDIO_BALANCE,
  41         V4L2_CID_AUDIO_BASS,
  42         V4L2_CID_AUDIO_TREBLE,
  43         V4L2_CID_AUDIO_MUTE,
  44         V4L2_CID_AUDIO_LOUDNESS,
  45         0
  46 };
  47
  48 static const u32 *ctrl_classes[] = {
  49         user_ctrls,
  50         cx2341x_mpeg_ctrls,
  51         NULL
  52 };
  53
  54 int cx18_queryctrl(struct file *file, void *fh, struct v4l2_queryctrl *qctrl)
  55 {
  56         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
  57         const char *name;
  58
  59         qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
  60         if (qctrl->id == 0)
  61                 return -EINVAL;
  62
  63         switch (qctrl->id) {
  64         /* Standard V4L2 controls */
  65         case V4L2_CID_USER_CLASS:
  66                 return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0);
  67         case V4L2_CID_BRIGHTNESS:
  68         case V4L2_CID_HUE:
  69         case V4L2_CID_SATURATION:
  70         case V4L2_CID_CONTRAST:
  71                 if (v4l2_subdev_call(cx->sd_av, core, queryctrl, qctrl))
  72                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  73                 return 0;
  74
  75         case V4L2_CID_AUDIO_VOLUME:
  76         case V4L2_CID_AUDIO_MUTE:
  77         case V4L2_CID_AUDIO_BALANCE:
  78         case V4L2_CID_AUDIO_BASS:
  79         case V4L2_CID_AUDIO_TREBLE:
  80         case V4L2_CID_AUDIO_LOUDNESS:
  81                 if (v4l2_subdev_call(cx->sd_av, core, queryctrl, qctrl))
  82                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  83                 return 0;
  84
  85         default:
  86                 if (cx2341x_ctrl_query(&cx->params, qctrl))
  87                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  88                 return 0;
  89         }
  90         strncpy(qctrl->name, name, sizeof(qctrl->name) - 1);
  91         qctrl->name[sizeof(qctrl->name) - 1] = 0;
  92         return 0;
  93 }
  94
  95 int cx18_querymenu(struct file *file, void *fh, struct v4l2_querymenu *qmenu)
  96 {
  97         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
  98         struct v4l2_queryctrl qctrl;
  99
 100         qctrl.id = qmenu->id;
 101         cx18_queryctrl(file, fh, &qctrl);
 102         return v4l2_ctrl_query_menu(qmenu, &qctrl,
 103                         cx2341x_ctrl_get_menu(&cx->params, qmenu->id));
 104 }
 105
 106 static int cx18_try_ctrl(struct file *file, void *fh,
 107                                         struct v4l2_ext_control *vctrl)
 108 {
 109         struct v4l2_queryctrl qctrl;
 110         const char **menu_items = NULL;
 111         int err;
 112
 113         qctrl.id = vctrl->id;
 114         err = cx18_queryctrl(file, fh, &qctrl);
 115         if (err)
 116                 return err;
 117         if (qctrl.type == V4L2_CTRL_TYPE_MENU)
 118                 menu_items = v4l2_ctrl_get_menu(qctrl.id);
 119         return v4l2_ctrl_check(vctrl, &qctrl, menu_items);
 120 }
 121
 122 static int cx18_s_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 123 {
 124         switch (vctrl->id) {
 125                 /* Standard V4L2 controls */
 126         case V4L2_CID_BRIGHTNESS:
 127         case V4L2_CID_HUE:
 128         case V4L2_CID_SATURATION:
 129         case V4L2_CID_CONTRAST:
 130                 return v4l2_subdev_call(cx->sd_av, core, s_ctrl, vctrl);
 131
 132         case V4L2_CID_AUDIO_VOLUME:
 133         case V4L2_CID_AUDIO_MUTE:
 134         case V4L2_CID_AUDIO_BALANCE:
 135         case V4L2_CID_AUDIO_BASS:
 136         case V4L2_CID_AUDIO_TREBLE:
 137         case V4L2_CID_AUDIO_LOUDNESS:
 138                 return v4l2_subdev_call(cx->sd_av, core, s_ctrl, vctrl);
 139
 140         default:
 141                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 142                 return -EINVAL;
 143         }
 144         return 0;
 145 }
 146
 147 static int cx18_g_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 148 {
 149         switch (vctrl->id) {
 150                 /* Standard V4L2 controls */
 151         case V4L2_CID_BRIGHTNESS:
 152         case V4L2_CID_HUE:
 153         case V4L2_CID_SATURATION:
 154         case V4L2_CID_CONTRAST:
 155                 return v4l2_subdev_call(cx->sd_av, core, g_ctrl, vctrl);
 156
 157         case V4L2_CID_AUDIO_VOLUME:
 158         case V4L2_CID_AUDIO_MUTE:
 159         case V4L2_CID_AUDIO_BALANCE:
 160         case V4L2_CID_AUDIO_BASS:
 161         case V4L2_CID_AUDIO_TREBLE:
 162         case V4L2_CID_AUDIO_LOUDNESS:
 163                 return v4l2_subdev_call(cx->sd_av, core, g_ctrl, vctrl);
 164
 165         default:
 166                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 167                 return -EINVAL;
 168         }
 169         return 0;
 170 }
 171
 172 static int cx18_setup_vbi_fmt(struct cx18 *cx,
 173                               enum v4l2_mpeg_stream_vbi_fmt fmt,
 174                               enum v4l2_mpeg_stream_type type)
 175 {
 176         if (!(cx->v4l2_cap & V4L2_CAP_SLICED_VBI_CAPTURE))
 177                 return -EINVAL;
 178         if (atomic_read(&cx->ana_capturing) > 0)
 179                 return -EBUSY;
 180
 181         if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
 182             !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
 183               type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
 184               type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) {
 185                 /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
 186                 cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
 187                 CX18_DEBUG_INFO("disabled insertion of sliced VBI data into "
 188                                 "the MPEG stream\n");
 189                 return 0;
 190         }
 191
 192         /* Allocate sliced VBI buffers if needed. */
 193         if (cx->vbi.sliced_mpeg_data[0] == NULL) {
 194                 int i;
 195
 196                 for (i = 0; i < CX18_VBI_FRAMES; i++) {
 197                         cx->vbi.sliced_mpeg_data[i] =
 198                                kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
 199                         if (cx->vbi.sliced_mpeg_data[i] == NULL) {
 200                                 while (--i >= 0) {
 201                                         kfree(cx->vbi.sliced_mpeg_data[i]);
 202                                         cx->vbi.sliced_mpeg_data[i] = NULL;
 203                                 }
 204                                 cx->vbi.insert_mpeg =
 205                                                   V4L2_MPEG_STREAM_VBI_FMT_NONE;
 206                                 CX18_WARN("Unable to allocate buffers for "
 207                                           "sliced VBI data insertion\n");
 208                                 return -ENOMEM;
 209                         }
 210                 }
 211         }
 212
 213         cx->vbi.insert_mpeg = fmt;
 214         CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,"
 215                         "when sliced VBI is enabled\n");
 216
 217         /*
 218          * If our current settings have no lines set for capture, store a valid,
 219          * default set of service lines to capture, in our current settings.
 220          */
 221         if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
 222                 if (cx->is_60hz)
 223                         cx->vbi.sliced_in->service_set =
 224                                                         V4L2_SLICED_CAPTION_525;
 225                 else
 226                         cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
 227                 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
 228         }
 229         return 0;
 230 }
 231
 232 int cx18_g_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 233 {
 234         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 235         struct v4l2_control ctrl;
 236
 237         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 238                 int i;
 239                 int err = 0;
 240
 241                 for (i = 0; i < c->count; i++) {
 242                         ctrl.id = c->controls[i].id;
 243                         ctrl.value = c->controls[i].value;
 244                         err = cx18_g_ctrl(cx, &ctrl);
 245                         c->controls[i].value = ctrl.value;
 246                         if (err) {
 247                                 c->error_idx = i;
 248                                 break;
 249                         }
 250                 }
 251                 return err;
 252         }
 253         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 254                 return cx2341x_ext_ctrls(&cx->params, 0, c, VIDIOC_G_EXT_CTRLS);
 255         return -EINVAL;
 256 }
 257
 258 int cx18_s_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 259 {
 260         struct cx18_open_id *id = fh;
 261         struct cx18 *cx = id->cx;
 262         int ret;
 263         struct v4l2_control ctrl;
 264
 265         ret = v4l2_prio_check(&cx->prio, &id->prio);
 266         if (ret)
 267                 return ret;
 268
 269         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 270                 int i;
 271                 int err = 0;
 272
 273                 for (i = 0; i < c->count; i++) {
 274                         ctrl.id = c->controls[i].id;
 275                         ctrl.value = c->controls[i].value;
 276                         err = cx18_s_ctrl(cx, &ctrl);
 277                         c->controls[i].value = ctrl.value;
 278                         if (err) {
 279                                 c->error_idx = i;
 280                                 break;
 281                         }
 282                 }
 283                 return err;
 284         }
 285         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
 286                 static u32 freqs[3] = { 44100, 48000, 32000 };
 287                 struct cx18_api_func_private priv;
 288                 struct cx2341x_mpeg_params p = cx->params;
 289                 int err = cx2341x_ext_ctrls(&p, atomic_read(&cx->ana_capturing),
 290                                                 c, VIDIOC_S_EXT_CTRLS);
 291                 unsigned int idx;
 292
 293                 if (err)
 294                         return err;
 295
 296                 if (p.video_encoding != cx->params.video_encoding) {
 297                         int is_mpeg1 = p.video_encoding ==
 298                                                 V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
 299                         struct v4l2_format fmt;
 300
 301                         /* fix videodecoder resolution */
 302                         fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 303                         fmt.fmt.pix.width = cx->params.width
 304                                                 / (is_mpeg1 ? 2 : 1);
 305                         fmt.fmt.pix.height = cx->params.height;
 306                         v4l2_subdev_call(cx->sd_av, video, s_fmt, &fmt);
 307                 }
 308                 priv.cx = cx;
 309                 priv.s = &cx->streams[id->type];
 310                 err = cx2341x_update(&priv, cx18_api_func, &cx->params, &p);
 311                 if (!err &&
 312                     (cx->params.stream_vbi_fmt != p.stream_vbi_fmt ||
 313                      cx->params.stream_type != p.stream_type))
 314                         err = cx18_setup_vbi_fmt(cx, p.stream_vbi_fmt,
 315                                                  p.stream_type);
 316                 cx->params = p;
 317                 cx->dualwatch_stereo_mode = p.audio_properties & 0x0300;
 318                 idx = p.audio_properties & 0x03;
 319                 /* The audio clock of the digitizer must match the codec sample
 320                    rate otherwise you get some very strange effects. */
 321                 if (idx < ARRAY_SIZE(freqs))
 322                         cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
 323                 return err;
 324         }
 325         return -EINVAL;
 326 }
 327
 328 int cx18_try_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 329 {
 330         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 331
 332         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 333                 int i;
 334                 int err = 0;
 335
 336                 for (i = 0; i < c->count; i++) {
 337                         err = cx18_try_ctrl(file, fh, &c->controls[i]);
 338                         if (err) {
 339                                 c->error_idx = i;
 340                                 break;
 341                         }
 342                 }
 343                 return err;
 344         }
 345         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 346                 return cx2341x_ext_ctrls(&cx->params,
 347                                                 atomic_read(&cx->ana_capturing),
 348                                                 c, VIDIOC_TRY_EXT_CTRLS);
 349         return -EINVAL;
 350 }