49 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Driver for the Conexant CX25821 PCIe bridge4 *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 113#define LINES_PER_BUFFER 1514#define AUDIO_LINE_SIZE 12815 16/* Number of buffer programs to use at once. */17#define NUMBER_OF_PROGRAMS 818 19/*20 * Max size of the RISC program for a buffer. - worst case is 2 writes per line21 * Space is also added for the 4 no-op instructions added on the end.22 */23#ifndef USE_RISC_NOOP24#define MAX_BUFFER_PROGRAM_SIZE \25 (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \26 RISC_WRITECR_INSTRUCTION_SIZE * 4)27#endif28 29/* MAE 12 July 2005 Try to use NOOP RISC instruction instead */30#ifdef USE_RISC_NOOP31#define MAX_BUFFER_PROGRAM_SIZE \32 (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \33 RISC_NOOP_INSTRUCTION_SIZE * 4)34#endif35 36/* Sizes of various instructions in bytes. Used when adding instructions. */37#define RISC_WRITE_INSTRUCTION_SIZE 1238#define RISC_JUMP_INSTRUCTION_SIZE 1239#define RISC_SKIP_INSTRUCTION_SIZE 440#define RISC_SYNC_INSTRUCTION_SIZE 441#define RISC_WRITECR_INSTRUCTION_SIZE 1642#define RISC_NOOP_INSTRUCTION_SIZE 443 44#define MAX_AUDIO_DMA_BUFFER_SIZE \45 (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS + \46 RISC_SYNC_INSTRUCTION_SIZE)47 48#endif49