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 19 #ifndef __CX25821_AUDIO_H__ 20 #define __CX25821_AUDIO_H__ 21 22 #define USE_RISC_NOOP 1 23 #define LINES_PER_BUFFER 15 24 #define AUDIO_LINE_SIZE 128 25 26 /* Number of buffer programs to use at once. */ 27 #define NUMBER_OF_PROGRAMS 8 28 29 /* 30 * Max size of the RISC program for a buffer. - worst case is 2 writes per line 31 * Space is also added for the 4 no-op instructions added on the end. 32 */ 33 #ifndef USE_RISC_NOOP 34 #define MAX_BUFFER_PROGRAM_SIZE \ 35 (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \ 36 RISC_WRITECR_INSTRUCTION_SIZE * 4) 37 #endif 38 39 /* MAE 12 July 2005 Try to use NOOP RISC instruction instead */ 40 #ifdef USE_RISC_NOOP 41 #define MAX_BUFFER_PROGRAM_SIZE \ 42 (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \ 43 RISC_NOOP_INSTRUCTION_SIZE * 4) 44 #endif 45 46 /* Sizes of various instructions in bytes. Used when adding instructions. */ 47 #define RISC_WRITE_INSTRUCTION_SIZE 12 48 #define RISC_JUMP_INSTRUCTION_SIZE 12 49 #define RISC_SKIP_INSTRUCTION_SIZE 4 50 #define RISC_SYNC_INSTRUCTION_SIZE 4 51 #define RISC_WRITECR_INSTRUCTION_SIZE 16 52 #define RISC_NOOP_INSTRUCTION_SIZE 4 53 54 #define MAX_AUDIO_DMA_BUFFER_SIZE \ 55 (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS + \ 56 RISC_SYNC_INSTRUCTION_SIZE) 57 58 #endif 59