1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *  Driver for the Conexant CX25821 PCIe bridge
4 *
5 *  Copyright (C) 2009 Conexant Systems Inc.
6 *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
7 */
8
9#ifndef __CX25821_AUDIO_H__
10#define __CX25821_AUDIO_H__
11
12#define USE_RISC_NOOP		1
13#define LINES_PER_BUFFER	15
14#define AUDIO_LINE_SIZE		128
15
16/* Number of buffer programs to use at once. */
17#define NUMBER_OF_PROGRAMS	8
18
19/*
20 * Max size of the RISC program for a buffer. - worst case is 2 writes per line
21 * Space is also added for the 4 no-op instructions added on the end.
22 */
23#ifndef USE_RISC_NOOP
24#define MAX_BUFFER_PROGRAM_SIZE						\
25	(2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +		\
26	 RISC_WRITECR_INSTRUCTION_SIZE * 4)
27#endif
28
29/* MAE 12 July 2005 Try to use NOOP RISC instruction instead */
30#ifdef USE_RISC_NOOP
31#define MAX_BUFFER_PROGRAM_SIZE						\
32	(2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +		\
33	 RISC_NOOP_INSTRUCTION_SIZE * 4)
34#endif
35
36/* Sizes of various instructions in bytes.  Used when adding instructions. */
37#define RISC_WRITE_INSTRUCTION_SIZE	12
38#define RISC_JUMP_INSTRUCTION_SIZE	12
39#define RISC_SKIP_INSTRUCTION_SIZE	4
40#define RISC_SYNC_INSTRUCTION_SIZE	4
41#define RISC_WRITECR_INSTRUCTION_SIZE	16
42#define RISC_NOOP_INSTRUCTION_SIZE	4
43
44#define MAX_AUDIO_DMA_BUFFER_SIZE					\
45	(MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS +			\
46	 RISC_SYNC_INSTRUCTION_SIZE)
47
48#endif
49