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         strscpy(f->description, "MPEG TS", sizeof(f->description));
  95         f->pixelformat = V4L2_PIX_FMT_MPEG;
  96         f->flags = V4L2_FMT_FLAG_COMPRESSED;
  97         return 0;
  98 }
  99
 100 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 101                                 struct v4l2_format *f)
 102 {
 103         struct saa7134_dev *dev = video_drvdata(file);
 104         struct v4l2_subdev_format fmt = {
 105                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 106         };
 107         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
 108
 109         saa_call_all(dev, pad, get_fmt, NULL, &fmt);
 110
 111         v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
 112         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 113         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 114         f->fmt.pix.bytesperline = 0;
 115
 116         return 0;
 117 }
 118
 119 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 120                                 struct v4l2_format *f)
 121 {
 122         struct saa7134_dev *dev = video_drvdata(file);
 123         struct v4l2_subdev_format format = {
 124                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 125         };
 126
 127         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 128         saa_call_all(dev, pad, set_fmt, NULL, &format);
 129         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 130
 131         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 132         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 133         f->fmt.pix.bytesperline = 0;
 134
 135         return 0;
 136 }
 137
 138 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 139                                 struct v4l2_format *f)
 140 {
 141         struct saa7134_dev *dev = video_drvdata(file);
 142         struct v4l2_subdev_pad_config pad_cfg;
 143         struct v4l2_subdev_format format = {
 144                 .which = V4L2_SUBDEV_FORMAT_TRY,
 145         };
 146
 147         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 148         saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
 149         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 150
 151         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 152         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 153         f->fmt.pix.bytesperline = 0;
 154
 155         return 0;
 156 }
 157
 158 static const struct v4l2_file_operations ts_fops =
 159 {
 160         .owner    = THIS_MODULE,
 161         .open     = v4l2_fh_open,
 162         .release  = vb2_fop_release,
 163         .read     = vb2_fop_read,
 164         .poll     = vb2_fop_poll,
 165         .mmap     = vb2_fop_mmap,
 166         .unlocked_ioctl = video_ioctl2,
 167 };
 168
 169 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 170         .vidioc_querycap                = saa7134_querycap,
 171         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 172         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 173         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 174         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 175         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 176         .vidioc_querybuf                = vb2_ioctl_querybuf,
 177         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 178         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 179         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 180         .vidioc_streamon                = vb2_ioctl_streamon,
 181         .vidioc_streamoff               = vb2_ioctl_streamoff,
 182         .vidioc_g_frequency             = saa7134_g_frequency,
 183         .vidioc_s_frequency             = saa7134_s_frequency,
 184         .vidioc_g_tuner                 = saa7134_g_tuner,
 185         .vidioc_s_tuner                 = saa7134_s_tuner,
 186         .vidioc_enum_input              = saa7134_enum_input,
 187         .vidioc_g_input                 = saa7134_g_input,
 188         .vidioc_s_input                 = saa7134_s_input,
 189         .vidioc_s_std                   = saa7134_s_std,
 190         .vidioc_g_std                   = saa7134_g_std,
 191         .vidioc_querystd                = saa7134_querystd,
 192         .vidioc_log_status              = v4l2_ctrl_log_status,
 193         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 194         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 195 };
 196
 197 /* ----------------------------------------------------------- */
 198
 199 static const struct video_device saa7134_empress_template = {
 200         .name          = "saa7134-empress",
 201         .fops          = &ts_fops,
 202         .ioctl_ops     = &ts_ioctl_ops,
 203
 204         .tvnorms                        = SAA7134_NORMS,
 205 };
 206
 207 static void empress_signal_update(struct work_struct *work)
 208 {
 209         struct saa7134_dev* dev =
 210                 container_of(work, struct saa7134_dev, empress_workqueue);
 211
 212         if (dev->nosignal) {
 213                 pr_debug("no video signal\n");
 214         } else {
 215                 pr_debug("video signal acquired\n");
 216         }
 217 }
 218
 219 static void empress_signal_change(struct saa7134_dev *dev)
 220 {
 221         schedule_work(&dev->empress_workqueue);
 222 }
 223
 224 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 225 {
 226         switch (ctrl->id) {
 227         case V4L2_CID_BRIGHTNESS:
 228         case V4L2_CID_HUE:
 229         case V4L2_CID_CONTRAST:
 230         case V4L2_CID_SATURATION:
 231         case V4L2_CID_AUDIO_MUTE:
 232         case V4L2_CID_AUDIO_VOLUME:
 233         case V4L2_CID_PRIVATE_INVERT:
 234         case V4L2_CID_PRIVATE_AUTOMUTE:
 235                 return true;
 236         default:
 237                 return false;
 238         }
 239 }
 240
 241 static int empress_init(struct saa7134_dev *dev)
 242 {
 243         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 244         struct vb2_queue *q;
 245         int err;
 246
 247         pr_debug("%s: %s\n", dev->name, __func__);
 248         dev->empress_dev = video_device_alloc();
 249         if (NULL == dev->empress_dev)
 250                 return -ENOMEM;
 251         *(dev->empress_dev) = saa7134_empress_template;
 252         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 253         dev->empress_dev->release = video_device_release;
 254         dev->empress_dev->lock = &dev->lock;
 255         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 256                  "%s empress (%s)", dev->name,
 257                  saa7134_boards[dev->board].name);
 258         v4l2_ctrl_handler_init(hdl, 21);
 259         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
 260         if (dev->empress_sd)
 261                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
 262         if (hdl->error) {
 263                 video_device_release(dev->empress_dev);
 264                 return hdl->error;
 265         }
 266         dev->empress_dev->ctrl_handler = hdl;
 267
 268         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 269
 270         q = &dev->empress_vbq;
 271         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 272         /*
 273          * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
 274          * transfers that do not start at the beginning of a page. A USERPTR
 275          * can start anywhere in a page, so USERPTR support is a no-go.
 276          */
 277         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
 278         q->drv_priv = &dev->ts_q;
 279         q->ops = &saa7134_empress_qops;
 280         q->gfp_flags = GFP_DMA32;
 281         q->mem_ops = &vb2_dma_sg_memops;
 282         q->buf_struct_size = sizeof(struct saa7134_buf);
 283         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 284         q->lock = &dev->lock;
 285         q->dev = &dev->pci->dev;
 286         err = vb2_queue_init(q);
 287         if (err)
 288                 return err;
 289         dev->empress_dev->queue = q;
 290
 291         video_set_drvdata(dev->empress_dev, dev);
 292         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 293                                     empress_nr[dev->nr]);
 294         if (err < 0) {
 295                 pr_info("%s: can't register video device\n",
 296                        dev->name);
 297                 video_device_release(dev->empress_dev);
 298                 dev->empress_dev = NULL;
 299                 return err;
 300         }
 301         pr_info("%s: registered device %s [mpeg]\n",
 302                dev->name, video_device_node_name(dev->empress_dev));
 303
 304         empress_signal_update(&dev->empress_workqueue);
 305         return 0;
 306 }
 307
 308 static int empress_fini(struct saa7134_dev *dev)
 309 {
 310         pr_debug("%s: %s\n", dev->name, __func__);
 311
 312         if (NULL == dev->empress_dev)
 313                 return 0;
 314         flush_work(&dev->empress_workqueue);
 315         video_unregister_device(dev->empress_dev);
 316         vb2_queue_release(&dev->empress_vbq);
 317         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 318         dev->empress_dev = NULL;
 319         return 0;
 320 }
 321
 322 static struct saa7134_mpeg_ops empress_ops = {
 323         .type          = SAA7134_MPEG_EMPRESS,
 324         .init          = empress_init,
 325         .fini          = empress_fini,
 326         .signal_change = empress_signal_change,
 327 };
 328
 329 static int __init empress_register(void)
 330 {
 331         return saa7134_ts_register(&empress_ops);
 332 }
 333
 334 static void __exit empress_unregister(void)
 335 {
 336         saa7134_ts_unregister(&empress_ops);
 337 }
 338
 339 module_init(empress_register);
 340 module_exit(empress_unregister);