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 + RISC_WRITECR_INSTRUCTION_SIZE*4) 40#endif 41 42/* MAE 12 July 2005 Try to use NOOP RISC instruction instead */ 43#ifdef USE_RISC_NOOP 44#define MAX_BUFFER_PROGRAM_SIZE \ 45 (2*LINES_PER_BUFFER*RISC_WRITE_INSTRUCTION_SIZE + RISC_NOOP_INSTRUCTION_SIZE*4) 46#endif 47 48/* Sizes of various instructions in bytes. Used when adding instructions. */ 49#define RISC_WRITE_INSTRUCTION_SIZE 12 50#define RISC_JUMP_INSTRUCTION_SIZE 12 51#define RISC_SKIP_INSTRUCTION_SIZE 4 52#define RISC_SYNC_INSTRUCTION_SIZE 4 53#define RISC_WRITECR_INSTRUCTION_SIZE 16 54#define RISC_NOOP_INSTRUCTION_SIZE 4 55 56#define MAX_AUDIO_DMA_BUFFER_SIZE (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS + RISC_SYNC_INSTRUCTION_SIZE) 57 58#endif 59