V4L/DVB (7786): cx18: new driver for the Conexant CX23418 MPEG encoder chip

Many thanks to Steve Toth from Hauppauge and Nattu Dakshinamurthy from
Conexant for their support. I am in particular thankful to Hauppauge
since without their help this driver would not exist. It should also
be noted that Steve did the work to get the DVB part up and running.
Thank you!

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: G. Andrew Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h
new file mode 100644
index 000000000000..f86c8a6fa6e7
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-queue.h
@@ -0,0 +1,59 @@
+/*
+ *  cx18 buffer queues
+ *
+ *  Derived from ivtv-queue.h
+ *
+ *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+#define CX18_DMA_UNMAPPED	((u32) -1)
+
+/* cx18_buffer utility functions */
+
+static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
+	struct cx18_buffer *buf)
+{
+	pci_dma_sync_single_for_cpu(s->cx->dev, buf->dma_handle,
+				s->buf_size, s->dma);
+}
+
+static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
+	struct cx18_buffer *buf)
+{
+	pci_dma_sync_single_for_device(s->cx->dev, buf->dma_handle,
+				s->buf_size, s->dma);
+}
+
+int cx18_buf_copy_from_user(struct cx18_stream *s, struct cx18_buffer *buf,
+	const char __user *src, int copybytes);
+void cx18_buf_swap(struct cx18_buffer *buf);
+
+/* cx18_queue utility functions */
+void cx18_queue_init(struct cx18_queue *q);
+void cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
+	struct cx18_queue *q);
+struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
+int cx18_queue_move(struct cx18_stream *s, struct cx18_queue *from,
+       struct cx18_queue *steal, struct cx18_queue *to, int needed_bytes);
+struct cx18_buffer *cx18_queue_find_buf(struct cx18_stream *s, u32 id,
+	u32 bytesused);
+void cx18_flush_queues(struct cx18_stream *s);
+
+/* cx18_stream utility functions */
+int cx18_stream_alloc(struct cx18_stream *s);
+void cx18_stream_free(struct cx18_stream *s);