linux/sound/pci/asihpi/hpidspcd.h
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   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/***********************************************************************/
   3/*
   4
   5    AudioScience HPI driver
   6    Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>
   7
   8
   9\file
  10Functions for reading DSP code to load into DSP
  11
  12*/
  13/***********************************************************************/
  14#ifndef _HPIDSPCD_H_
  15#define _HPIDSPCD_H_
  16
  17#include "hpi_internal.h"
  18
  19/** Header structure for dsp firmware file
  20 This structure must match that used in s2bin.c for generation of asidsp.bin
  21 */
  22/*#ifndef DISABLE_PRAGMA_PACK1 */
  23/*#pragma pack(push, 1) */
  24/*#endif */
  25struct code_header {
  26        /** Size in bytes including header */
  27        u32 size;
  28        /** File type tag "CODE" == 0x45444F43 */
  29        u32 type;
  30        /** Adapter model number */
  31        u32 adapter;
  32        /** Firmware version*/
  33        u32 version;
  34        /** Data checksum */
  35        u32 checksum;
  36};
  37/*#ifndef DISABLE_PRAGMA_PACK1 */
  38/*#pragma pack(pop) */
  39/*#endif */
  40
  41/*? Don't need the pragmas? */
  42compile_time_assert((sizeof(struct code_header) == 20), code_header_size);
  43
  44/** Descriptor for dspcode from firmware loader */
  45struct dsp_code {
  46        /** copy of  file header */
  47        struct code_header header;
  48        /** Expected number of words in the whole dsp code,INCL header */
  49        u32 block_length;
  50        /** Number of words read so far */
  51        u32 word_count;
  52
  53        /** internal state of DSP code reader */
  54        struct dsp_code_private *pvt;
  55};
  56
  57/** Prepare *psDspCode to refer to the requested adapter's firmware.
  58Code file name is obtained from HpiOs_GetDspCodePath
  59
  60\return 0 for success, or error code if requested code is not available
  61*/
  62short hpi_dsp_code_open(
  63        /** Code identifier, usually adapter family */
  64        u32 adapter, void *pci_dev,
  65        /** Pointer to DSP code control structure */
  66        struct dsp_code *ps_dsp_code,
  67        /** Pointer to dword to receive OS specific error code */
  68        u32 *pos_error_code);
  69
  70/** Close the DSP code file */
  71void hpi_dsp_code_close(struct dsp_code *ps_dsp_code);
  72
  73/** Rewind to the beginning of the DSP code file (for verify) */
  74void hpi_dsp_code_rewind(struct dsp_code *ps_dsp_code);
  75
  76/** Read one word from the dsp code file
  77        \return 0 for success, or error code if eof, or block length exceeded
  78*/
  79short hpi_dsp_code_read_word(struct dsp_code *ps_dsp_code,
  80                                      /**< DSP code descriptor */
  81        u32 *pword /**< Where to store the read word */
  82        );
  83
  84/** Get a block of dsp code into an internal buffer, and provide a pointer to
  85that buffer. (If dsp code is already an array in memory, it is referenced,
  86not copied.)
  87
  88\return Error if requested number of words are not available
  89*/
  90short hpi_dsp_code_read_block(size_t words_requested,
  91        struct dsp_code *ps_dsp_code,
  92        /* Pointer to store (Pointer to code buffer) */
  93        u32 **ppblock);
  94
  95#endif
  96