49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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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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#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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