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/* * Driver for the Conexant CX25821 PCIe bridge * * Copyright (C) 2009 Conexant Systems Inc. * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef __CX25821_AUDIO_H__ #define __CX25821_AUDIO_H__ #define USE_RISC_NOOP 1 #define LINES_PER_BUFFER 15 #define AUDIO_LINE_SIZE 128 /* Number of buffer programs to use at once. */ #define NUMBER_OF_PROGRAMS 8 /* * Max size of the RISC program for a buffer. - worst case is 2 writes per line * Space is also added for the 4 no-op instructions added on the end. */ #ifndef USE_RISC_NOOP #define MAX_BUFFER_PROGRAM_SIZE \ (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \ RISC_WRITECR_INSTRUCTION_SIZE * 4) #endif /* MAE 12 July 2005 Try to use NOOP RISC instruction instead */ #ifdef USE_RISC_NOOP #define MAX_BUFFER_PROGRAM_SIZE \ (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE + \ RISC_NOOP_INSTRUCTION_SIZE * 4) #endif /* Sizes of various instructions in bytes. Used when adding instructions. */ #define RISC_WRITE_INSTRUCTION_SIZE 12 #define RISC_JUMP_INSTRUCTION_SIZE 12 #define RISC_SKIP_INSTRUCTION_SIZE 4 #define RISC_SYNC_INSTRUCTION_SIZE 4 #define RISC_WRITECR_INSTRUCTION_SIZE 16 #define RISC_NOOP_INSTRUCTION_SIZE 4 #define MAX_AUDIO_DMA_BUFFER_SIZE \ (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS + \ RISC_SYNC_INSTRUCTION_SIZE) #endif |