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-av-core.h"
  26 #include "cx18-cards.h"
  27 #include "cx18-ioctl.h"
  28 #include "cx18-audio.h"
  29 #include "cx18-i2c.h"
  30 #include "cx18-mailbox.h"
  31 #include "cx18-controls.h"
  32
  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_BRIGHTNESS:
  66         case V4L2_CID_HUE:
  67         case V4L2_CID_SATURATION:
  68         case V4L2_CID_CONTRAST:
  69                 if (cx18_av_cmd(cx, VIDIOC_QUERYCTRL, qctrl))
  70                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  71                 return 0;
  72
  73         case V4L2_CID_AUDIO_VOLUME:
  74         case V4L2_CID_AUDIO_MUTE:
  75         case V4L2_CID_AUDIO_BALANCE:
  76         case V4L2_CID_AUDIO_BASS:
  77         case V4L2_CID_AUDIO_TREBLE:
  78         case V4L2_CID_AUDIO_LOUDNESS:
  79                 if (cx18_i2c_hw(cx, cx->card->hw_audio_ctrl, VIDIOC_QUERYCTRL, qctrl))
  80                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  81                 return 0;
  82
  83         default:
  84                 if (cx2341x_ctrl_query(&cx->params, qctrl))
  85                         qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
  86                 return 0;
  87         }
  88         strncpy(qctrl->name, name, sizeof(qctrl->name) - 1);
  89         qctrl->name[sizeof(qctrl->name) - 1] = 0;
  90         return 0;
  91 }
  92
  93 int cx18_querymenu(struct file *file, void *fh, struct v4l2_querymenu *qmenu)
  94 {
  95         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
  96         struct v4l2_queryctrl qctrl;
  97
  98         qctrl.id = qmenu->id;
  99         cx18_queryctrl(file, fh, &qctrl);
 100         return v4l2_ctrl_query_menu(qmenu, &qctrl,
 101                         cx2341x_ctrl_get_menu(&cx->params, qmenu->id));
 102 }
 103
 104 static int cx18_try_ctrl(struct file *file, void *fh,
 105                                         struct v4l2_ext_control *vctrl)
 106 {
 107         struct v4l2_queryctrl qctrl;
 108         const char **menu_items = NULL;
 109         int err;
 110
 111         qctrl.id = vctrl->id;
 112         err = cx18_queryctrl(file, fh, &qctrl);
 113         if (err)
 114                 return err;
 115         if (qctrl.type == V4L2_CTRL_TYPE_MENU)
 116                 menu_items = v4l2_ctrl_get_menu(qctrl.id);
 117         return v4l2_ctrl_check(vctrl, &qctrl, menu_items);
 118 }
 119
 120 static int cx18_s_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 121 {
 122         switch (vctrl->id) {
 123                 /* Standard V4L2 controls */
 124         case V4L2_CID_BRIGHTNESS:
 125         case V4L2_CID_HUE:
 126         case V4L2_CID_SATURATION:
 127         case V4L2_CID_CONTRAST:
 128                 return cx18_av_cmd(cx, VIDIOC_S_CTRL, vctrl);
 129
 130         case V4L2_CID_AUDIO_VOLUME:
 131         case V4L2_CID_AUDIO_MUTE:
 132         case V4L2_CID_AUDIO_BALANCE:
 133         case V4L2_CID_AUDIO_BASS:
 134         case V4L2_CID_AUDIO_TREBLE:
 135         case V4L2_CID_AUDIO_LOUDNESS:
 136                 return cx18_i2c_hw(cx, cx->card->hw_audio_ctrl, VIDIOC_S_CTRL, vctrl);
 137
 138         default:
 139                 CX18_DEBUG_IOCTL("invalid control 0x%x\n", vctrl->id);
 140                 return -EINVAL;
 141         }
 142         return 0;
 143 }
 144
 145 static int cx18_g_ctrl(struct cx18 *cx, struct v4l2_control *vctrl)
 146 {
 147         switch (vctrl->id) {
 148                 /* Standard V4L2 controls */
 149         case V4L2_CID_BRIGHTNESS:
 150         case V4L2_CID_HUE:
 151         case V4L2_CID_SATURATION:
 152         case V4L2_CID_CONTRAST:
 153                 return cx18_av_cmd(cx, VIDIOC_G_CTRL, vctrl);
 154
 155         case V4L2_CID_AUDIO_VOLUME:
 156         case V4L2_CID_AUDIO_MUTE:
 157         case V4L2_CID_AUDIO_BALANCE:
 158         case V4L2_CID_AUDIO_BASS:
 159         case V4L2_CID_AUDIO_TREBLE:
 160         case V4L2_CID_AUDIO_LOUDNESS:
 161                 return cx18_i2c_hw(cx, cx->card->hw_audio_ctrl, VIDIOC_G_CTRL, vctrl);
 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, enum v4l2_mpeg_stream_vbi_fmt fmt)
 170 {
 171         if (!(cx->v4l2_cap & V4L2_CAP_SLICED_VBI_CAPTURE))
 172                 return -EINVAL;
 173         if (atomic_read(&cx->ana_capturing) > 0)
 174                 return -EBUSY;
 175
 176         /* First try to allocate sliced VBI buffers if needed. */
 177         if (fmt && cx->vbi.sliced_mpeg_data[0] == NULL) {
 178                 int i;
 179
 180                 for (i = 0; i < CX18_VBI_FRAMES; i++) {
 181                         /* Yuck, hardcoded. Needs to be a define */
 182                         cx->vbi.sliced_mpeg_data[i] = kmalloc(2049, GFP_KERNEL);
 183                         if (cx->vbi.sliced_mpeg_data[i] == NULL) {
 184                                 while (--i >= 0) {
 185                                         kfree(cx->vbi.sliced_mpeg_data[i]);
 186                                         cx->vbi.sliced_mpeg_data[i] = NULL;
 187                                 }
 188                                 return -ENOMEM;
 189                         }
 190                 }
 191         }
 192
 193         cx->vbi.insert_mpeg = fmt;
 194
 195         if (cx->vbi.insert_mpeg == 0)
 196                 return 0;
 197         /* Need sliced data for mpeg insertion */
 198         if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
 199                 if (cx->is_60hz)
 200                         cx->vbi.sliced_in->service_set = V4L2_SLICED_CAPTION_525;
 201                 else
 202                         cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
 203                 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
 204         }
 205         return 0;
 206 }
 207
 208 int cx18_g_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 209 {
 210         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 211         struct v4l2_control ctrl;
 212
 213         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 214                 int i;
 215                 int err = 0;
 216
 217                 for (i = 0; i < c->count; i++) {
 218                         ctrl.id = c->controls[i].id;
 219                         ctrl.value = c->controls[i].value;
 220                         err = cx18_g_ctrl(cx, &ctrl);
 221                         c->controls[i].value = ctrl.value;
 222                         if (err) {
 223                                 c->error_idx = i;
 224                                 break;
 225                         }
 226                 }
 227                 return err;
 228         }
 229         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 230                 return cx2341x_ext_ctrls(&cx->params, 0, c, VIDIOC_G_EXT_CTRLS);
 231         return -EINVAL;
 232 }
 233
 234 int cx18_s_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 235 {
 236         struct cx18_open_id *id = fh;
 237         struct cx18 *cx = id->cx;
 238         int ret;
 239         struct v4l2_control ctrl;
 240
 241         ret = v4l2_prio_check(&cx->prio, &id->prio);
 242         if (ret)
 243                 return ret;
 244
 245         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 246                 int i;
 247                 int err = 0;
 248
 249                 for (i = 0; i < c->count; i++) {
 250                         ctrl.id = c->controls[i].id;
 251                         ctrl.value = c->controls[i].value;
 252                         err = cx18_s_ctrl(cx, &ctrl);
 253                         c->controls[i].value = ctrl.value;
 254                         if (err) {
 255                                 c->error_idx = i;
 256                                 break;
 257                         }
 258                 }
 259                 return err;
 260         }
 261         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
 262                 struct cx2341x_mpeg_params p = cx->params;
 263                 int err = cx2341x_ext_ctrls(&p, atomic_read(&cx->ana_capturing),
 264                                                 c, VIDIOC_S_EXT_CTRLS);
 265
 266                 if (err)
 267                         return err;
 268
 269                 if (p.video_encoding != cx->params.video_encoding) {
 270                         int is_mpeg1 = p.video_encoding ==
 271                                                 V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
 272                         struct v4l2_format fmt;
 273
 274                         /* fix videodecoder resolution */
 275                         fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 276                         fmt.fmt.pix.width = cx->params.width
 277                                                 / (is_mpeg1 ? 2 : 1);
 278                         fmt.fmt.pix.height = cx->params.height;
 279                         cx18_av_cmd(cx, VIDIOC_S_FMT, &fmt);
 280                 }
 281                 err = cx2341x_update(cx, cx18_api_func, &cx->params, &p);
 282                 if (!err && cx->params.stream_vbi_fmt != p.stream_vbi_fmt)
 283                         err = cx18_setup_vbi_fmt(cx, p.stream_vbi_fmt);
 284                 cx->params = p;
 285                 cx->dualwatch_stereo_mode = p.audio_properties & 0x0300;
 286                 cx18_audio_set_audio_clock_freq(cx, p.audio_properties & 0x03);
 287                 return err;
 288         }
 289         return -EINVAL;
 290 }
 291
 292 int cx18_try_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 293 {
 294         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 295
 296         if (c->ctrl_class == V4L2_CTRL_CLASS_USER) {
 297                 int i;
 298                 int err = 0;
 299
 300                 for (i = 0; i < c->count; i++) {
 301                         err = cx18_try_ctrl(file, fh, &c->controls[i]);
 302                         if (err) {
 303                                 c->error_idx = i;
 304                                 break;
 305                         }
 306                 }
 307                 return err;
 308         }
 309         if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG)
 310                 return cx2341x_ext_ctrls(&cx->params,
 311                                                 atomic_read(&cx->ana_capturing),
 312                                                 c, VIDIOC_TRY_EXT_CTRLS);
 313         return -EINVAL;
 314 }