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