1 files changed, 435 insertions, 0 deletions

diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c
new file mode 100644
index 0000000000..7921445938
--- /dev/null
+++ b/drivers/media/common/saa7146/saa7146_fops.c
@@ -0,0 +1,435 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <media/drv-intf/saa7146_vv.h>
+#include <linux/module.h>
+
+/****************************************************************************/
+/* resource management functions, shamelessly stolen from saa7134 driver */
+
+int saa7146_res_get(struct saa7146_dev *dev, unsigned int bit)
+{
+	struct saa7146_vv *vv = dev->vv_data;
+
+	if (vv->resources & bit) {
+		DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
+		      bit, vv->resources);
+		/* have it already allocated */
+		return 1;
+	}
+
+	/* is it free? */
+	if (vv->resources & bit) {
+		DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
+		      vv->resources, bit);
+		/* no, someone else uses it */
+		return 0;
+	}
+	/* it's free, grab it */
+	vv->resources |= bit;
+	DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
+	return 1;
+}
+
+void saa7146_res_free(struct saa7146_dev *dev, unsigned int bits)
+{
+	struct saa7146_vv *vv = dev->vv_data;
+
+	WARN_ON((vv->resources & bits) != bits);
+
+	vv->resources &= ~bits;
+	DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
+}
+
+
+/********************************************************************************/
+/* common buffer functions */
+
+int saa7146_buffer_queue(struct saa7146_dev *dev,
+			 struct saa7146_dmaqueue *q,
+			 struct saa7146_buf *buf)
+{
+	assert_spin_locked(&dev->slock);
+	DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
+
+	if (WARN_ON(!q))
+		return -EIO;
+
+	if (NULL == q->curr) {
+		q->curr = buf;
+		DEB_D("immediately activating buffer %p\n", buf);
+		buf->activate(dev,buf,NULL);
+	} else {
+		list_add_tail(&buf->list, &q->queue);
+		DEB_D("adding buffer %p to queue. (active buffer present)\n",
+		      buf);
+	}
+	return 0;
+}
+
+void saa7146_buffer_finish(struct saa7146_dev *dev,
+			   struct saa7146_dmaqueue *q,
+			   int state)
+{
+	struct saa7146_vv *vv = dev->vv_data;
+	struct saa7146_buf *buf = q->curr;
+
+	assert_spin_locked(&dev->slock);
+	DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
+	DEB_EE("q->curr:%p\n", q->curr);
+
+	/* finish current buffer */
+	if (!buf) {
+		DEB_D("aiii. no current buffer\n");
+		return;
+	}
+
+	q->curr = NULL;
+	buf->vb.vb2_buf.timestamp = ktime_get_ns();
+	if (vv->video_fmt.field == V4L2_FIELD_ALTERNATE)
+		buf->vb.field = vv->last_field;
+	else if (vv->video_fmt.field == V4L2_FIELD_ANY)
+		buf->vb.field = (vv->video_fmt.height > vv->standard->v_max_out / 2)
+			? V4L2_FIELD_INTERLACED
+			: V4L2_FIELD_BOTTOM;
+	else
+		buf->vb.field = vv->video_fmt.field;
+	buf->vb.sequence = vv->seqnr++;
+	vb2_buffer_done(&buf->vb.vb2_buf, state);
+}
+
+void saa7146_buffer_next(struct saa7146_dev *dev,
+			 struct saa7146_dmaqueue *q, int vbi)
+{
+	struct saa7146_buf *buf,*next = NULL;
+
+	if (WARN_ON(!q))
+		return;
+
+	DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
+
+	assert_spin_locked(&dev->slock);
+	if (!list_empty(&q->queue)) {
+		/* activate next one from queue */
+		buf = list_entry(q->queue.next, struct saa7146_buf, list);
+		list_del(&buf->list);
+		if (!list_empty(&q->queue))
+			next = list_entry(q->queue.next, struct saa7146_buf, list);
+		q->curr = buf;
+		DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
+			buf, q->queue.prev, q->queue.next);
+		buf->activate(dev,buf,next);
+	} else {
+		DEB_INT("no next buffer. stopping.\n");
+		if( 0 != vbi ) {
+			/* turn off video-dma3 */
+			saa7146_write(dev,MC1, MASK_20);
+		} else {
+			/* nothing to do -- just prevent next video-dma1 transfer
+			   by lowering the protection address */
+
+			// fixme: fix this for vflip != 0
+
+			saa7146_write(dev, PROT_ADDR1, 0);
+			saa7146_write(dev, MC2, (MASK_02|MASK_18));
+
+			/* write the address of the rps-program */
+			saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
+			/* turn on rps */
+			saa7146_write(dev, MC1, (MASK_12 | MASK_28));
+
+/*
+			printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
+			printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
+			printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
+			printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
+			printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
+			printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
+*/
+		}
+		del_timer(&q->timeout);
+	}
+}
+
+void saa7146_buffer_timeout(struct timer_list *t)
+{
+	struct saa7146_dmaqueue *q = from_timer(q, t, timeout);
+	struct saa7146_dev *dev = q->dev;
+	unsigned long flags;
+
+	DEB_EE("dev:%p, dmaq:%p\n", dev, q);
+
+	spin_lock_irqsave(&dev->slock,flags);
+	if (q->curr) {
+		DEB_D("timeout on %p\n", q->curr);
+		saa7146_buffer_finish(dev, q, VB2_BUF_STATE_ERROR);
+	}
+
+	/* we don't restart the transfer here like other drivers do. when
+	   a streaming capture is disabled, the timeout function will be
+	   called for the current buffer. if we activate the next buffer now,
+	   we mess up our capture logic. if a timeout occurs on another buffer,
+	   then something is seriously broken before, so no need to buffer the
+	   next capture IMHO... */
+
+	saa7146_buffer_next(dev, q, 0);
+
+	spin_unlock_irqrestore(&dev->slock,flags);
+}
+
+/********************************************************************************/
+/* file operations */
+
+static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct saa7146_dev *dev = video_drvdata(file);
+	int ret;
+
+	if (vdev->vfl_type != VFL_TYPE_VBI || !dev->ext_vv_data->vbi_fops.write)
+		return -EINVAL;
+	if (mutex_lock_interruptible(vdev->lock))
+		return -ERESTARTSYS;
+	ret = dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
+	mutex_unlock(vdev->lock);
+	return ret;
+}
+
+static const struct v4l2_file_operations video_fops =
+{
+	.owner		= THIS_MODULE,
+	.open		= v4l2_fh_open,
+	.release	= vb2_fop_release,
+	.read		= vb2_fop_read,
+	.write		= fops_write,
+	.poll		= vb2_fop_poll,
+	.mmap		= vb2_fop_mmap,
+	.unlocked_ioctl	= video_ioctl2,
+};
+
+static void vv_callback(struct saa7146_dev *dev, unsigned long status)
+{
+	u32 isr = status;
+
+	DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
+
+	if (0 != (isr & (MASK_27))) {
+		DEB_INT("irq: RPS0 (0x%08x)\n", isr);
+		saa7146_video_uops.irq_done(dev,isr);
+	}
+
+	if (0 != (isr & (MASK_28))) {
+		u32 mc2 = saa7146_read(dev, MC2);
+		if( 0 != (mc2 & MASK_15)) {
+			DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
+			wake_up(&dev->vv_data->vbi_wq);
+			saa7146_write(dev,MC2, MASK_31);
+			return;
+		}
+		DEB_INT("irq: RPS1 (0x%08x)\n", isr);
+		saa7146_vbi_uops.irq_done(dev,isr);
+	}
+}
+
+static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
+	.s_ctrl = saa7146_s_ctrl,
+};
+
+int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
+{
+	struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
+	struct v4l2_pix_format *fmt;
+	struct v4l2_vbi_format *vbi;
+	struct saa7146_vv *vv;
+	int err;
+
+	err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
+	if (err)
+		return err;
+
+	v4l2_ctrl_handler_init(hdl, 6);
+	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+		V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
+	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+		V4L2_CID_CONTRAST, 0, 127, 1, 64);
+	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+		V4L2_CID_SATURATION, 0, 127, 1, 64);
+	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+		V4L2_CID_VFLIP, 0, 1, 1, 0);
+	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
+		V4L2_CID_HFLIP, 0, 1, 1, 0);
+	if (hdl->error) {
+		err = hdl->error;
+		v4l2_ctrl_handler_free(hdl);
+		v4l2_device_unregister(&dev->v4l2_dev);
+		return err;
+	}
+	dev->v4l2_dev.ctrl_handler = hdl;
+
+	vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
+	if (vv == NULL) {
+		ERR("out of memory. aborting.\n");
+		v4l2_ctrl_handler_free(hdl);
+		v4l2_device_unregister(&dev->v4l2_dev);
+		return -ENOMEM;
+	}
+	ext_vv->vid_ops = saa7146_video_ioctl_ops;
+	ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
+	ext_vv->core_ops = &saa7146_video_ioctl_ops;
+
+	DEB_EE("dev:%p\n", dev);
+
+	/* set default values for video parts of the saa7146 */
+	saa7146_write(dev, BCS_CTRL, 0x80400040);
+
+	/* enable video-port pins */
+	saa7146_write(dev, MC1, (MASK_10 | MASK_26));
+
+	/* save per-device extension data (one extension can
+	   handle different devices that might need different
+	   configuration data) */
+	dev->ext_vv_data = ext_vv;
+
+	saa7146_video_uops.init(dev,vv);
+	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
+		saa7146_vbi_uops.init(dev,vv);
+
+	fmt = &vv->video_fmt;
+	fmt->width = 384;
+	fmt->height = 288;
+	fmt->pixelformat = V4L2_PIX_FMT_BGR24;
+	fmt->field = V4L2_FIELD_INTERLACED;
+	fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
+	fmt->bytesperline = 3 * fmt->width;
+	fmt->sizeimage = fmt->bytesperline * fmt->height;
+
+	vbi = &vv->vbi_fmt;
+	vbi->sampling_rate	= 27000000;
+	vbi->offset		= 248; /* todo */
+	vbi->samples_per_line	= 720 * 2;
+	vbi->sample_format	= V4L2_PIX_FMT_GREY;
+
+	/* fixme: this only works for PAL */
+	vbi->start[0] = 5;
+	vbi->count[0] = 16;
+	vbi->start[1] = 312;
+	vbi->count[1] = 16;
+
+	timer_setup(&vv->vbi_read_timeout, NULL, 0);
+
+	dev->vv_data = vv;
+	dev->vv_callback = &vv_callback;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_vv_init);
+
+int saa7146_vv_release(struct saa7146_dev* dev)
+{
+	struct saa7146_vv *vv = dev->vv_data;
+
+	DEB_EE("dev:%p\n", dev);
+
+	v4l2_device_unregister(&dev->v4l2_dev);
+	v4l2_ctrl_handler_free(&dev->ctrl_handler);
+	kfree(vv);
+	dev->vv_data = NULL;
+	dev->vv_callback = NULL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_vv_release);
+
+int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
+			    char *name, int type)
+{
+	struct vb2_queue *q;
+	int err;
+	int i;
+
+	DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
+
+	vfd->fops = &video_fops;
+	if (type == VFL_TYPE_VIDEO) {
+		vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
+		q = &dev->vv_data->video_dmaq.q;
+	} else {
+		vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
+		q = &dev->vv_data->vbi_dmaq.q;
+	}
+	vfd->release = video_device_release_empty;
+	vfd->lock = &dev->v4l2_lock;
+	vfd->v4l2_dev = &dev->v4l2_dev;
+	vfd->tvnorms = 0;
+	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
+		vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
+	strscpy(vfd->name, name, sizeof(vfd->name));
+	vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+			   V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
+	vfd->device_caps |= dev->ext_vv_data->capabilities;
+	if (type == VFL_TYPE_VIDEO) {
+		vfd->device_caps &=
+			~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
+	} else if (vfd->device_caps & V4L2_CAP_SLICED_VBI_OUTPUT) {
+		vfd->vfl_dir = VFL_DIR_TX;
+		vfd->device_caps &= ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+				      V4L2_CAP_AUDIO | V4L2_CAP_TUNER);
+	} else {
+		vfd->device_caps &= ~V4L2_CAP_VIDEO_CAPTURE;
+	}
+
+	q->type = type == VFL_TYPE_VIDEO ? V4L2_BUF_TYPE_VIDEO_CAPTURE : V4L2_BUF_TYPE_VBI_CAPTURE;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
+	q->ops = type == VFL_TYPE_VIDEO ? &video_qops : &vbi_qops;
+	q->mem_ops = &vb2_dma_sg_memops;
+	q->drv_priv = dev;
+	q->gfp_flags = __GFP_DMA32;
+	q->buf_struct_size = sizeof(struct saa7146_buf);
+	q->lock = &dev->v4l2_lock;
+	q->min_buffers_needed = 2;
+	q->dev = &dev->pci->dev;
+	err = vb2_queue_init(q);
+	if (err)
+		return err;
+	vfd->queue = q;
+
+	video_set_drvdata(vfd, dev);
+
+	err = video_register_device(vfd, type, -1);
+	if (err < 0) {
+		ERR("cannot register v4l2 device. skipping.\n");
+		return err;
+	}
+
+	pr_info("%s: registered device %s [v4l2]\n",
+		dev->name, video_device_node_name(vfd));
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_register_device);
+
+int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
+{
+	DEB_EE("dev:%p\n", dev);
+
+	video_unregister_device(vfd);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_unregister_device);
+
+static int __init saa7146_vv_init_module(void)
+{
+	return 0;
+}
+
+
+static void __exit saa7146_vv_cleanup_module(void)
+{
+}
+
+module_init(saa7146_vv_init_module);
+module_exit(saa7146_vv_cleanup_module);
+
+MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
+MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
+MODULE_LICENSE("GPL");