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 + \ 40 RISC_WRITECR_INSTRUCTION_SIZE * 4) 41 #endif 42 43 /* MAE 12 July 2005 Try to use NOOP RISC instruction instead */ 44 #ifdef USE_RISC_NOOP 45 #define MAX_BUFFER_PROGRAM_SIZE \ 46 (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \ 47 RISC_NOOP_INSTRUCTION_SIZE * 4) 48 #endif 49 50 /* Sizes of various instructions in bytes. Used when adding instructions. */ 51 #define RISC_WRITE_INSTRUCTION_SIZE 12 52 #define RISC_JUMP_INSTRUCTION_SIZE 12 53 #define RISC_SKIP_INSTRUCTION_SIZE 4 54 #define RISC_SYNC_INSTRUCTION_SIZE 4 55 #define RISC_WRITECR_INSTRUCTION_SIZE 16 56 #define RISC_NOOP_INSTRUCTION_SIZE 4 57 58 #define MAX_AUDIO_DMA_BUFFER_SIZE \ 59 (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS + \ 60 RISC_SYNC_INSTRUCTION_SIZE) 61 62 #endif 63