Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / usb / au0828 / au0828-vbi.c

diff --git a/kernel/drivers/media/usb/au0828/au0828-vbi.c b/kernel/drivers/media/usb/au0828/au0828-vbi.c
new file mode 100644 (file)
index 0000000..f67247c
--- /dev/null
+++ b/kernel/drivers/media/usb/au0828/au0828-vbi.c
@@ -0,0 +1,94 @@
+/*
+   au0828-vbi.c - VBI driver for au0828
+
+   Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
+
+   This work was sponsored by GetWellNetwork Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.
+ */
+
+#include "au0828.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+
+/* ------------------------------------------------------------------ */
+
+static int vbi_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+                          unsigned int *nbuffers, unsigned int *nplanes,
+                          unsigned int sizes[], void *alloc_ctxs[])
+{
+       struct au0828_dev *dev = vb2_get_drv_priv(vq);
+       unsigned long img_size = dev->vbi_width * dev->vbi_height * 2;
+       unsigned long size;
+
+       size = fmt ? (fmt->fmt.vbi.samples_per_line *
+               (fmt->fmt.vbi.count[0] + fmt->fmt.vbi.count[1])) : img_size;
+       if (size < img_size)
+               return -EINVAL;
+
+       *nplanes = 1;
+       sizes[0] = size;
+
+       return 0;
+}
+
+static int vbi_buffer_prepare(struct vb2_buffer *vb)
+{
+       struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
+       struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
+       unsigned long size;
+
+       size = dev->vbi_width * dev->vbi_height * 2;
+
+       if (vb2_plane_size(vb, 0) < size) {
+               pr_err("%s data will not fit into plane (%lu < %lu)\n",
+                       __func__, vb2_plane_size(vb, 0), size);
+               return -EINVAL;
+       }
+       vb2_set_plane_payload(&buf->vb, 0, size);
+
+       return 0;
+}
+
+static void
+vbi_buffer_queue(struct vb2_buffer *vb)
+{
+       struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
+       struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
+       struct au0828_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);
+}
+
+struct vb2_ops au0828_vbi_qops = {
+       .queue_setup     = vbi_queue_setup,
+       .buf_prepare     = vbi_buffer_prepare,
+       .buf_queue       = vbi_buffer_queue,
+       .start_streaming = au0828_start_analog_streaming,
+       .stop_streaming  = au0828_stop_vbi_streaming,
+       .wait_prepare    = vb2_ops_wait_prepare,
+       .wait_finish     = vb2_ops_wait_finish,
+};