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kernel add
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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
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