drivers/media/pci/saa7134/saa7134-empress.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
   5  */
   6
   7 #include "saa7134.h"
   8 #include "saa7134-reg.h"
   9
  10 #include <linux/init.h>
  11 #include <linux/list.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/delay.h>
  15
  16 #include <media/v4l2-common.h>
  17 #include <media/v4l2-event.h>
  18
  19 /* ------------------------------------------------------------------ */
  20
  21 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  22 MODULE_LICENSE("GPL");
  23
  24 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  25
  26 module_param_array(empress_nr, int, NULL, 0444);
  27 MODULE_PARM_DESC(empress_nr,"ts device number");
  28
  29 /* ------------------------------------------------------------------ */
  30
  31 static int start_streaming(struct vb2_queue *vq, unsigned int count)
  32 {
  33         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
  34         struct saa7134_dev *dev = dmaq->dev;
  35         u32 leading_null_bytes = 0;
  36         int err;
  37
  38         err = saa7134_ts_start_streaming(vq, count);
  39         if (err)
  40                 return err;
  41
  42         /* If more cards start to need this, then this
  43            should probably be added to the card definitions. */
  44         switch (dev->board) {
  45         case SAA7134_BOARD_BEHOLD_M6:
  46         case SAA7134_BOARD_BEHOLD_M63:
  47         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  48                 leading_null_bytes = 1;
  49                 break;
  50         }
  51         saa_call_all(dev, core, init, leading_null_bytes);
  52         /* Unmute audio */
  53         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  54                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
  55         dev->empress_started = 1;
  56         return 0;
  57 }
  58
  59 static void stop_streaming(struct vb2_queue *vq)
  60 {
  61         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
  62         struct saa7134_dev *dev = dmaq->dev;
  63
  64         saa7134_ts_stop_streaming(vq);
  65         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  66         msleep(20);
  67         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  68         msleep(100);
  69         /* Mute audio */
  70         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  71                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
  72         dev->empress_started = 0;
  73 }
  74
  75 static const struct vb2_ops saa7134_empress_qops = {
  76         .queue_setup    = saa7134_ts_queue_setup,
  77         .buf_init       = saa7134_ts_buffer_init,
  78         .buf_prepare    = saa7134_ts_buffer_prepare,
  79         .buf_queue      = saa7134_vb2_buffer_queue,
  80         .wait_prepare   = vb2_ops_wait_prepare,
  81         .wait_finish    = vb2_ops_wait_finish,
  82         .start_streaming = start_streaming,
  83         .stop_streaming = stop_streaming,
  84 };
  85
  86 /* ------------------------------------------------------------------ */
  87
  88 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
  89                                         struct v4l2_fmtdesc *f)
  90 {
  91         if (f->index != 0)
  92                 return -EINVAL;
  93
  94         f->pixelformat = V4L2_PIX_FMT_MPEG;
  95         return 0;
  96 }
  97
  98 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
  99                                 struct v4l2_format *f)
 100 {
 101         struct saa7134_dev *dev = video_drvdata(file);
 102         struct v4l2_subdev_format fmt = {
 103                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 104         };
 105         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
 106
 107         saa_call_all(dev, pad, get_fmt, NULL, &fmt);
 108
 109         v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
 110         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 111         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 112         f->fmt.pix.bytesperline = 0;
 113
 114         return 0;
 115 }
 116
 117 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 118                                 struct v4l2_format *f)
 119 {
 120         struct saa7134_dev *dev = video_drvdata(file);
 121         struct v4l2_subdev_format format = {
 122                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 123         };
 124
 125         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 126         saa_call_all(dev, pad, set_fmt, NULL, &format);
 127         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 128
 129         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 130         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 131         f->fmt.pix.bytesperline = 0;
 132
 133         return 0;
 134 }
 135
 136 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 137                                 struct v4l2_format *f)
 138 {
 139         struct saa7134_dev *dev = video_drvdata(file);
 140         struct v4l2_subdev_pad_config pad_cfg;
 141         struct v4l2_subdev_format format = {
 142                 .which = V4L2_SUBDEV_FORMAT_TRY,
 143         };
 144
 145         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 146         saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
 147         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 148
 149         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 150         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 151         f->fmt.pix.bytesperline = 0;
 152
 153         return 0;
 154 }
 155
 156 static const struct v4l2_file_operations ts_fops =
 157 {
 158         .owner    = THIS_MODULE,
 159         .open     = v4l2_fh_open,
 160         .release  = vb2_fop_release,
 161         .read     = vb2_fop_read,
 162         .poll     = vb2_fop_poll,
 163         .mmap     = vb2_fop_mmap,
 164         .unlocked_ioctl = video_ioctl2,
 165 };
 166
 167 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 168         .vidioc_querycap                = saa7134_querycap,
 169         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 170         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 171         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 172         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 173         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 174         .vidioc_querybuf                = vb2_ioctl_querybuf,
 175         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 176         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 177         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 178         .vidioc_streamon                = vb2_ioctl_streamon,
 179         .vidioc_streamoff               = vb2_ioctl_streamoff,
 180         .vidioc_g_frequency             = saa7134_g_frequency,
 181         .vidioc_s_frequency             = saa7134_s_frequency,
 182         .vidioc_g_tuner                 = saa7134_g_tuner,
 183         .vidioc_s_tuner                 = saa7134_s_tuner,
 184         .vidioc_enum_input              = saa7134_enum_input,
 185         .vidioc_g_input                 = saa7134_g_input,
 186         .vidioc_s_input                 = saa7134_s_input,
 187         .vidioc_s_std                   = saa7134_s_std,
 188         .vidioc_g_std                   = saa7134_g_std,
 189         .vidioc_querystd                = saa7134_querystd,
 190         .vidioc_log_status              = v4l2_ctrl_log_status,
 191         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 192         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 193 };
 194
 195 /* ----------------------------------------------------------- */
 196
 197 static const struct video_device saa7134_empress_template = {
 198         .name          = "saa7134-empress",
 199         .fops          = &ts_fops,
 200         .ioctl_ops     = &ts_ioctl_ops,
 201
 202         .tvnorms                        = SAA7134_NORMS,
 203 };
 204
 205 static void empress_signal_update(struct work_struct *work)
 206 {
 207         struct saa7134_dev* dev =
 208                 container_of(work, struct saa7134_dev, empress_workqueue);
 209
 210         if (dev->nosignal) {
 211                 pr_debug("no video signal\n");
 212         } else {
 213                 pr_debug("video signal acquired\n");
 214         }
 215 }
 216
 217 static void empress_signal_change(struct saa7134_dev *dev)
 218 {
 219         schedule_work(&dev->empress_workqueue);
 220 }
 221
 222 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 223 {
 224         switch (ctrl->id) {
 225         case V4L2_CID_BRIGHTNESS:
 226         case V4L2_CID_HUE:
 227         case V4L2_CID_CONTRAST:
 228         case V4L2_CID_SATURATION:
 229         case V4L2_CID_AUDIO_MUTE:
 230         case V4L2_CID_AUDIO_VOLUME:
 231         case V4L2_CID_PRIVATE_INVERT:
 232         case V4L2_CID_PRIVATE_AUTOMUTE:
 233                 return true;
 234         default:
 235                 return false;
 236         }
 237 }
 238
 239 static int empress_init(struct saa7134_dev *dev)
 240 {
 241         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 242         struct vb2_queue *q;
 243         int err;
 244
 245         pr_debug("%s: %s\n", dev->name, __func__);
 246         dev->empress_dev = video_device_alloc();
 247         if (NULL == dev->empress_dev)
 248                 return -ENOMEM;
 249         *(dev->empress_dev) = saa7134_empress_template;
 250         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 251         dev->empress_dev->release = video_device_release;
 252         dev->empress_dev->lock = &dev->lock;
 253         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 254                  "%s empress (%s)", dev->name,
 255                  saa7134_boards[dev->board].name);
 256         v4l2_ctrl_handler_init(hdl, 21);
 257         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
 258         if (dev->empress_sd)
 259                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
 260         if (hdl->error) {
 261                 video_device_release(dev->empress_dev);
 262                 return hdl->error;
 263         }
 264         dev->empress_dev->ctrl_handler = hdl;
 265
 266         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 267
 268         q = &dev->empress_vbq;
 269         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 270         /*
 271          * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
 272          * transfers that do not start at the beginning of a page. A USERPTR
 273          * can start anywhere in a page, so USERPTR support is a no-go.
 274          */
 275         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
 276         q->drv_priv = &dev->ts_q;
 277         q->ops = &saa7134_empress_qops;
 278         q->gfp_flags = GFP_DMA32;
 279         q->mem_ops = &vb2_dma_sg_memops;
 280         q->buf_struct_size = sizeof(struct saa7134_buf);
 281         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 282         q->lock = &dev->lock;
 283         q->dev = &dev->pci->dev;
 284         err = vb2_queue_init(q);
 285         if (err)
 286                 return err;
 287         dev->empress_dev->queue = q;
 288         dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
 289                                         V4L2_CAP_VIDEO_CAPTURE;
 290         if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
 291                 dev->empress_dev->device_caps |= V4L2_CAP_TUNER;
 292
 293         video_set_drvdata(dev->empress_dev, dev);
 294         err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO,
 295                                     empress_nr[dev->nr]);
 296         if (err < 0) {
 297                 pr_info("%s: can't register video device\n",
 298                        dev->name);
 299                 video_device_release(dev->empress_dev);
 300                 dev->empress_dev = NULL;
 301                 return err;
 302         }
 303         pr_info("%s: registered device %s [mpeg]\n",
 304                dev->name, video_device_node_name(dev->empress_dev));
 305
 306         empress_signal_update(&dev->empress_workqueue);
 307         return 0;
 308 }
 309
 310 static int empress_fini(struct saa7134_dev *dev)
 311 {
 312         pr_debug("%s: %s\n", dev->name, __func__);
 313
 314         if (NULL == dev->empress_dev)
 315                 return 0;
 316         flush_work(&dev->empress_workqueue);
 317         vb2_video_unregister_device(dev->empress_dev);
 318         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 319         dev->empress_dev = NULL;
 320         return 0;
 321 }
 322
 323 static struct saa7134_mpeg_ops empress_ops = {
 324         .type          = SAA7134_MPEG_EMPRESS,
 325         .init          = empress_init,
 326         .fini          = empress_fini,
 327         .signal_change = empress_signal_change,
 328 };
 329
 330 static int __init empress_register(void)
 331 {
 332         return saa7134_ts_register(&empress_ops);
 333 }
 334
 335 static void __exit empress_unregister(void)
 336 {
 337         saa7134_ts_unregister(&empress_ops);
 338 }
 339
 340 module_init(empress_register);
 341 module_exit(empress_unregister);