1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-vbi.c b/drivers/media/usb/em28xx/em28xx-vbi.c
new file mode 100644
index 000000000..b253c44c9
--- /dev/null
+++ b/drivers/media/usb/em28xx/em28xx-vbi.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// em28xx-vbi.c - VBI driver for em28xx
+//
+// Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
+//
+// This work was sponsored by EyeMagnet Limited.
+
+#include "em28xx.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/hardirq.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+
+#include "em28xx-v4l.h"
+
+/* ------------------------------------------------------------------ */
+
+static int vbi_queue_setup(struct vb2_queue *vq,
+			   unsigned int *nbuffers, unsigned int *nplanes,
+			   unsigned int sizes[], struct device *alloc_devs[])
+{
+	struct em28xx *dev = vb2_get_drv_priv(vq);
+	struct em28xx_v4l2 *v4l2 = dev->v4l2;
+	unsigned long size = v4l2->vbi_width * v4l2->vbi_height * 2;
+
+	if (*nbuffers < 2)
+		*nbuffers = 2;
+
+	if (*nplanes) {
+		if (sizes[0] < size)
+			return -EINVAL;
+		size = sizes[0];
+	}
+
+	*nplanes = 1;
+	sizes[0] = size;
+
+	return 0;
+}
+
+static int vbi_buffer_prepare(struct vb2_buffer *vb)
+{
+	struct em28xx        *dev  = vb2_get_drv_priv(vb->vb2_queue);
+	struct em28xx_v4l2   *v4l2 = dev->v4l2;
+	unsigned long        size;
+
+	size = v4l2->vbi_width * v4l2->vbi_height * 2;
+
+	if (vb2_plane_size(vb, 0) < size) {
+		dev_info(&dev->intf->dev,
+			 "%s data will not fit into plane (%lu < %lu)\n",
+			 __func__, vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+	vb2_set_plane_payload(vb, 0, size);
+
+	return 0;
+}
+
+static void
+vbi_buffer_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
+	struct em28xx_buffer *buf =
+		container_of(vbuf, struct em28xx_buffer, vb);
+	struct em28xx_dmaqueue *vbiq = &dev->vbiq;
+	unsigned long flags = 0;
+
+	buf->mem = vb2_plane_vaddr(vb, 0);
+	buf->length = vb2_plane_size(vb, 0);
+
+	spin_lock_irqsave(&dev->slock, flags);
+	list_add_tail(&buf->list, &vbiq->active);
+	spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+const struct vb2_ops em28xx_vbi_qops = {
+	.queue_setup    = vbi_queue_setup,
+	.buf_prepare    = vbi_buffer_prepare,
+	.buf_queue      = vbi_buffer_queue,
+	.start_streaming = em28xx_start_analog_streaming,
+	.stop_streaming = em28xx_stop_vbi_streaming,
+	.wait_prepare   = vb2_ops_wait_prepare,
+	.wait_finish    = vb2_ops_wait_finish,
+};