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/* SPDX-License-Identifier: GPL-2.0-only */
AudioScience HPI driver
Copyright (C) 1997-2011 AudioScience Inc. <>
Functions for reading DSP code to load into DSP
#ifndef _HPIDSPCD_H_
#define _HPIDSPCD_H_
#include "hpi_internal.h"
/** Header structure for dsp firmware file
This structure must match that used in s2bin.c for generation of asidsp.bin
/*#pragma pack(push, 1) */
/*#endif */
struct code_header {
/** Size in bytes including header */
u32 size;
/** File type tag "CODE" == 0x45444F43 */
u32 type;
/** Adapter model number */
u32 adapter;
/** Firmware version*/
u32 version;
/** Data checksum */
u32 checksum;
/*#pragma pack(pop) */
/*#endif */
/*? Don't need the pragmas? */
compile_time_assert((sizeof(struct code_header) == 20), code_header_size);
/** Descriptor for dspcode from firmware loader */
struct dsp_code {
/** copy of file header */
struct code_header header;
/** Expected number of words in the whole dsp code,INCL header */
u32 block_length;
/** Number of words read so far */
u32 word_count;
/** internal state of DSP code reader */
struct dsp_code_private *pvt;
/** Prepare *psDspCode to refer to the requested adapter's firmware.
Code file name is obtained from HpiOs_GetDspCodePath
\return 0 for success, or error code if requested code is not available
short hpi_dsp_code_open(
/** Code identifier, usually adapter family */
u32 adapter, void *pci_dev,
/** Pointer to DSP code control structure */
struct dsp_code *ps_dsp_code,
/** Pointer to dword to receive OS specific error code */
u32 *pos_error_code);
/** Close the DSP code file */
void hpi_dsp_code_close(struct dsp_code *ps_dsp_code);
/** Rewind to the beginning of the DSP code file (for verify) */
void hpi_dsp_code_rewind(struct dsp_code *ps_dsp_code);
/** Read one word from the dsp code file
\return 0 for success, or error code if eof, or block length exceeded
short hpi_dsp_code_read_word(struct dsp_code *ps_dsp_code,
/**< DSP code descriptor */
u32 *pword /**< Where to store the read word */
/** Get a block of dsp code into an internal buffer, and provide a pointer to
that buffer. (If dsp code is already an array in memory, it is referenced,
not copied.)
\return Error if requested number of words are not available
short hpi_dsp_code_read_block(size_t words_requested,
struct dsp_code *ps_dsp_code,
/* Pointer to store (Pointer to code buffer) */
u32 **ppblock);