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