From 1c1e45d17b663d4749af456ab7c2fc1f36405ef8 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 28 Apr 2008 20:24:33 -0300 Subject: 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 Signed-off-by: Steven Toth Signed-off-by: Michael Krufky Signed-off-by: G. Andrew Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-queue.h | 59 +++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 drivers/media/video/cx18/cx18-queue.h (limited to 'drivers/media/video/cx18/cx18-queue.h') diff --git a/drivers/media/video/cx18/cx18-queue.h b/drivers/media/video/cx18/cx18-queue.h new file mode 100644 index 00000000000..f86c8a6fa6e --- /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 + * + * 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); -- cgit v1.2.3