linux/drivers/media/pci/saa7134/saa7134-empress.c
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   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
  21MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  22MODULE_LICENSE("GPL");
  23
  24static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  25
  26module_param_array(empress_nr, int, NULL, 0444);
  27MODULE_PARM_DESC(empress_nr,"ts device number");
  28
  29/* ------------------------------------------------------------------ */
  30
  31static 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
  59static 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
  75static 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
  88static 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
  98static 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
 117static 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
 136static 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
 156static 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
 167static 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
 197static 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
 205static 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
 217static void empress_signal_change(struct saa7134_dev *dev)
 218{
 219        schedule_work(&dev->empress_workqueue);
 220}
 221
 222static 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
 239static 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                video_device_release(dev->empress_dev);
 287                dev->empress_dev = NULL;
 288                return err;
 289        }
 290        dev->empress_dev->queue = q;
 291        dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
 292                                        V4L2_CAP_VIDEO_CAPTURE;
 293        if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
 294                dev->empress_dev->device_caps |= V4L2_CAP_TUNER;
 295
 296        video_set_drvdata(dev->empress_dev, dev);
 297        err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO,
 298                                    empress_nr[dev->nr]);
 299        if (err < 0) {
 300                pr_info("%s: can't register video device\n",
 301                       dev->name);
 302                video_device_release(dev->empress_dev);
 303                dev->empress_dev = NULL;
 304                return err;
 305        }
 306        pr_info("%s: registered device %s [mpeg]\n",
 307               dev->name, video_device_node_name(dev->empress_dev));
 308
 309        empress_signal_update(&dev->empress_workqueue);
 310        return 0;
 311}
 312
 313static int empress_fini(struct saa7134_dev *dev)
 314{
 315        pr_debug("%s: %s\n", dev->name, __func__);
 316
 317        if (NULL == dev->empress_dev)
 318                return 0;
 319        flush_work(&dev->empress_workqueue);
 320        vb2_video_unregister_device(dev->empress_dev);
 321        v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 322        dev->empress_dev = NULL;
 323        return 0;
 324}
 325
 326static struct saa7134_mpeg_ops empress_ops = {
 327        .type          = SAA7134_MPEG_EMPRESS,
 328        .init          = empress_init,
 329        .fini          = empress_fini,
 330        .signal_change = empress_signal_change,
 331};
 332
 333static int __init empress_register(void)
 334{
 335        return saa7134_ts_register(&empress_ops);
 336}
 337
 338static void __exit empress_unregister(void)
 339{
 340        saa7134_ts_unregister(&empress_ops);
 341}
 342
 343module_init(empress_register);
 344module_exit(empress_unregister);
 345