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