1/*
2 *  Driver for the Conexant CX25821 PCIe bridge
3 *
4 *  Copyright (C) 2009 Conexant Systems Inc.
5 *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
6 *
7 *  This program is free software; you can redistribute it and/or modify
8 *  it under the terms of the GNU General Public License as published by
9 *  the Free Software Foundation; either version 2 of the License, or
10 *  (at your option) any later version.
11 *
12 *  This program is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 *
16 *  GNU General Public License for more details.
17 *
18 *  You should have received a copy of the GNU General Public License
19 *  along with this program; if not, write to the Free Software
20 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23#ifndef __CX25821_AUDIO_H__
24#define __CX25821_AUDIO_H__
25
26#define USE_RISC_NOOP		1
27#define LINES_PER_BUFFER	15
28#define AUDIO_LINE_SIZE		128
29
30/* Number of buffer programs to use at once. */
31#define NUMBER_OF_PROGRAMS	8
32
33/*
34 * Max size of the RISC program for a buffer. - worst case is 2 writes per line
35 * Space is also added for the 4 no-op instructions added on the end.
36 */
37#ifndef USE_RISC_NOOP
38#define MAX_BUFFER_PROGRAM_SIZE						\
39	(2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +		\
40	 RISC_WRITECR_INSTRUCTION_SIZE * 4)
41#endif
42
43/* MAE 12 July 2005 Try to use NOOP RISC instruction instead */
44#ifdef USE_RISC_NOOP
45#define MAX_BUFFER_PROGRAM_SIZE						\
46	(2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +		\
47	 RISC_NOOP_INSTRUCTION_SIZE * 4)
48#endif
49
50/* Sizes of various instructions in bytes.  Used when adding instructions. */
51#define RISC_WRITE_INSTRUCTION_SIZE	12
52#define RISC_JUMP_INSTRUCTION_SIZE	12
53#define RISC_SKIP_INSTRUCTION_SIZE	4
54#define RISC_SYNC_INSTRUCTION_SIZE	4
55#define RISC_WRITECR_INSTRUCTION_SIZE	16
56#define RISC_NOOP_INSTRUCTION_SIZE	4
57
58#define MAX_AUDIO_DMA_BUFFER_SIZE					\
59	(MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS +			\
60	 RISC_SYNC_INSTRUCTION_SIZE)
61
62#endif
63