diff options
Diffstat (limited to 'drivers/media/pci/saa7134/saa7134-empress.c')
| -rw-r--r-- | drivers/media/pci/saa7134/saa7134-empress.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/drivers/media/pci/saa7134/saa7134-empress.c b/drivers/media/pci/saa7134/saa7134-empress.c new file mode 100644 index 000000000..aafbb3476 --- /dev/null +++ b/drivers/media/pci/saa7134/saa7134-empress.c @@ -0,0 +1,347 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] + */ + +#include "saa7134.h" +#include "saa7134-reg.h" + +#include <linux/init.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> + +#include <media/v4l2-common.h> +#include <media/v4l2-event.h> + +/* ------------------------------------------------------------------ */ + +MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); +MODULE_LICENSE("GPL"); + +static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET }; + +module_param_array(empress_nr, int, NULL, 0444); +MODULE_PARM_DESC(empress_nr,"ts device number"); + +/* ------------------------------------------------------------------ */ + +static int start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct saa7134_dmaqueue *dmaq = vq->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + u32 leading_null_bytes = 0; + int err; + + err = saa7134_ts_start_streaming(vq, count); + if (err) + return err; + + /* If more cards start to need this, then this + should probably be added to the card definitions. */ + switch (dev->board) { + case SAA7134_BOARD_BEHOLD_M6: + case SAA7134_BOARD_BEHOLD_M63: + case SAA7134_BOARD_BEHOLD_M6_EXTRA: + leading_null_bytes = 1; + break; + } + saa_call_all(dev, core, init, leading_null_bytes); + /* Unmute audio */ + saa_writeb(SAA7134_AUDIO_MUTE_CTRL, + saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6)); + dev->empress_started = 1; + return 0; +} + +static void stop_streaming(struct vb2_queue *vq) +{ + struct saa7134_dmaqueue *dmaq = vq->drv_priv; + struct saa7134_dev *dev = dmaq->dev; + + saa7134_ts_stop_streaming(vq); + saa_writeb(SAA7134_SPECIAL_MODE, 0x00); + msleep(20); + saa_writeb(SAA7134_SPECIAL_MODE, 0x01); + msleep(100); + /* Mute audio */ + saa_writeb(SAA7134_AUDIO_MUTE_CTRL, + saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6)); + dev->empress_started = 0; +} + +static const struct vb2_ops saa7134_empress_qops = { + .queue_setup = saa7134_ts_queue_setup, + .buf_init = saa7134_ts_buffer_init, + .buf_prepare = saa7134_ts_buffer_prepare, + .buf_queue = saa7134_vb2_buffer_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .start_streaming = start_streaming, + .stop_streaming = stop_streaming, +}; + +/* ------------------------------------------------------------------ */ + +static int empress_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (f->index != 0) + return -EINVAL; + + f->pixelformat = V4L2_PIX_FMT_MPEG; + return 0; +} + +static int empress_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct saa7134_dev *dev = video_drvdata(file); + struct v4l2_subdev_format fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format; + + saa_call_all(dev, pad, get_fmt, NULL, &fmt); + + v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt); + f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; + f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; + f->fmt.pix.bytesperline = 0; + + return 0; +} + +static int empress_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct saa7134_dev *dev = video_drvdata(file); + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + + v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED); + saa_call_all(dev, pad, set_fmt, NULL, &format); + v4l2_fill_pix_format(&f->fmt.pix, &format.format); + + f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; + f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; + f->fmt.pix.bytesperline = 0; + + return 0; +} + +static int empress_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct saa7134_dev *dev = video_drvdata(file); + struct v4l2_subdev_pad_config pad_cfg; + struct v4l2_subdev_state pad_state = { + .pads = &pad_cfg + }; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_TRY, + }; + + v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED); + saa_call_all(dev, pad, set_fmt, &pad_state, &format); + v4l2_fill_pix_format(&f->fmt.pix, &format.format); + + f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG; + f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets; + f->fmt.pix.bytesperline = 0; + + return 0; +} + +static const struct v4l2_file_operations ts_fops = +{ + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops ts_ioctl_ops = { + .vidioc_querycap = saa7134_querycap, + .vidioc_enum_fmt_vid_cap = empress_enum_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = empress_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = empress_s_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = empress_g_fmt_vid_cap, + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + .vidioc_g_frequency = saa7134_g_frequency, + .vidioc_s_frequency = saa7134_s_frequency, + .vidioc_g_tuner = saa7134_g_tuner, + .vidioc_s_tuner = saa7134_s_tuner, + .vidioc_enum_input = saa7134_enum_input, + .vidioc_g_input = saa7134_g_input, + .vidioc_s_input = saa7134_s_input, + .vidioc_s_std = saa7134_s_std, + .vidioc_g_std = saa7134_g_std, + .vidioc_querystd = saa7134_querystd, + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/* ----------------------------------------------------------- */ + +static const struct video_device saa7134_empress_template = { + .name = "saa7134-empress", + .fops = &ts_fops, + .ioctl_ops = &ts_ioctl_ops, + + .tvnorms = SAA7134_NORMS, +}; + +static void empress_signal_update(struct work_struct *work) +{ + struct saa7134_dev* dev = + container_of(work, struct saa7134_dev, empress_workqueue); + + if (dev->nosignal) { + pr_debug("no video signal\n"); + } else { + pr_debug("video signal acquired\n"); + } +} + +static void empress_signal_change(struct saa7134_dev *dev) +{ + schedule_work(&dev->empress_workqueue); +} + +static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl) +{ + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + case V4L2_CID_HUE: + case V4L2_CID_CONTRAST: + case V4L2_CID_SATURATION: + case V4L2_CID_AUDIO_MUTE: + case V4L2_CID_AUDIO_VOLUME: + case V4L2_CID_PRIVATE_INVERT: + case V4L2_CID_PRIVATE_AUTOMUTE: + return true; + default: + return false; + } +} + +static int empress_init(struct saa7134_dev *dev) +{ + struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler; + struct vb2_queue *q; + int err; + + pr_debug("%s: %s\n", dev->name, __func__); + dev->empress_dev = video_device_alloc(); + if (NULL == dev->empress_dev) + return -ENOMEM; + *(dev->empress_dev) = saa7134_empress_template; + dev->empress_dev->v4l2_dev = &dev->v4l2_dev; + dev->empress_dev->release = video_device_release; + dev->empress_dev->lock = &dev->lock; + snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name), + "%s empress (%s)", dev->name, + saa7134_boards[dev->board].name); + v4l2_ctrl_handler_init(hdl, 21); + v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false); + if (dev->empress_sd) + v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true); + if (hdl->error) { + video_device_release(dev->empress_dev); + return hdl->error; + } + dev->empress_dev->ctrl_handler = hdl; + + INIT_WORK(&dev->empress_workqueue, empress_signal_update); + + q = &dev->empress_vbq; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + /* + * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle + * transfers that do not start at the beginning of a page. A USERPTR + * can start anywhere in a page, so USERPTR support is a no-go. + */ + q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; + q->drv_priv = &dev->ts_q; + q->ops = &saa7134_empress_qops; + q->gfp_flags = GFP_DMA32; + q->mem_ops = &vb2_dma_sg_memops; + q->buf_struct_size = sizeof(struct saa7134_buf); + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &dev->lock; + q->dev = &dev->pci->dev; + err = vb2_queue_init(q); + if (err) { + video_device_release(dev->empress_dev); + dev->empress_dev = NULL; + return err; + } + dev->empress_dev->queue = q; + dev->empress_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING | + V4L2_CAP_VIDEO_CAPTURE; + if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET) + dev->empress_dev->device_caps |= V4L2_CAP_TUNER; + + video_set_drvdata(dev->empress_dev, dev); + err = video_register_device(dev->empress_dev,VFL_TYPE_VIDEO, + empress_nr[dev->nr]); + if (err < 0) { + pr_info("%s: can't register video device\n", + dev->name); + video_device_release(dev->empress_dev); + dev->empress_dev = NULL; + return err; + } + pr_info("%s: registered device %s [mpeg]\n", + dev->name, video_device_node_name(dev->empress_dev)); + + empress_signal_update(&dev->empress_workqueue); + return 0; +} + +static int empress_fini(struct saa7134_dev *dev) +{ + pr_debug("%s: %s\n", dev->name, __func__); + + if (NULL == dev->empress_dev) + return 0; + flush_work(&dev->empress_workqueue); + vb2_video_unregister_device(dev->empress_dev); + v4l2_ctrl_handler_free(&dev->empress_ctrl_handler); + dev->empress_dev = NULL; + return 0; +} + +static struct saa7134_mpeg_ops empress_ops = { + .type = SAA7134_MPEG_EMPRESS, + .init = empress_init, + .fini = empress_fini, + .signal_change = empress_signal_change, +}; + +static int __init empress_register(void) +{ + return saa7134_ts_register(&empress_ops); +} + +static void __exit empress_unregister(void) +{ + saa7134_ts_unregister(&empress_ops); +} + +module_init(empress_register); +module_exit(empress_unregister); |