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hpidspcd.c

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/***********************************************************************/
/*!

    AudioScience HPI driver
    Copyright (C) 1997-2003  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

\file
Functions for reading DSP code to load into DSP

(Linux only:) If DSPCODE_FIRMWARE_LOADER is defined, code is read using
hotplug firmware loader from individual dsp code files

If neither of the above is defined, code is read from linked arrays.
DSPCODE_ARRAY is defined.

HPI_INCLUDE_**** must be defined
and the appropriate hzz?????.c or hex?????.c linked in

 */
/***********************************************************************/
#define SOURCEFILE_NAME "hpidspcd.c"
#include "hpidspcd.h"
#include "hpidebug.h"

/**
 Header structure for binary dsp code file (see asidsp.doc)
 This structure must match that used in s2bin.c for generation of asidsp.bin
 */

#ifndef DISABLE_PRAGMA_PACK1
#pragma pack(push, 1)
#endif

00047 struct code_header {
      u32 size;
      char type[4];
      u32 adapter;
      u32 version;
      u32 crc;
};

#ifndef DISABLE_PRAGMA_PACK1
#pragma pack(pop)
#endif

#define HPI_VER_DECIMAL ((int)(HPI_VER_MAJOR(HPI_VER) * 10000 + \
          HPI_VER_MINOR(HPI_VER) * 100 + HPI_VER_RELEASE(HPI_VER)))

/***********************************************************************/
#include "linux/pci.h"
/*-------------------------------------------------------------------*/
00065 short HpiDspCode_Open(
      u32 nAdapter,
      struct dsp_code *psDspCode,
      u32 *pdwOsErrorCode
)
{
      const struct firmware *psFirmware = psDspCode->psFirmware;
      struct code_header header;
      char fw_name[20];
      int err;

      sprintf(fw_name, "asihpi/dsp%04x.bin", nAdapter);
      HPI_DEBUG_LOG(INFO, "Requesting firmware for %s\n", fw_name);

#if (LINUX_VERSION_CODE < KERNEL_VERSION(2 , 5 , 0))
      err = request_firmware(&psFirmware, fw_name,
            psDspCode->psDev->slot_name);
#else
      err = request_firmware(&psFirmware, fw_name, &psDspCode->psDev->dev);
#endif
      if (err != 0) {
            HPI_DEBUG_LOG(ERROR, "%d, request_firmware failed for  %s\n",
                  err, fw_name);
            goto error1;
      }
      if (psFirmware->size < sizeof(header)) {
            HPI_DEBUG_LOG(ERROR, "Header size too small %s\n", fw_name);
            goto error2;
      }
      memcpy(&header, psFirmware->data, sizeof(header));
      if (header.adapter != nAdapter) {
            HPI_DEBUG_LOG(ERROR, "Adapter type incorrect %4x != %4x\n",
                  header.adapter, nAdapter);
            goto error2;
      }
      if (header.size != psFirmware->size) {
            HPI_DEBUG_LOG(ERROR, "Code size wrong  %d != %ld\n",
                  header.size, (unsigned long)psFirmware->size);
            goto error2;
      }

      if (header.version != HPI_VER_DECIMAL) {
            HPI_DEBUG_LOG(WARNING,
                  "Version mismatch  DSP image %d != Driver %d\n",
                  header.version, HPI_VER_DECIMAL);
            /* goto error2;  still allow driver to load */
      }

      HPI_DEBUG_LOG(INFO, "Dsp code %s opened\n", fw_name);
      psDspCode->psFirmware = psFirmware;
      psDspCode->dwBlockLength = header.size / sizeof(u32);
      psDspCode->dwWordCount = sizeof(header) / sizeof(u32);
      psDspCode->dwVersion = header.version;
      psDspCode->dwCrc = header.crc;
      return 0;

error2:
      release_firmware(psFirmware);
error1:
      psDspCode->psFirmware = NULL;
      psDspCode->dwBlockLength = 0;
      return (HPI_ERROR_DSP_FILE_NOT_FOUND);
}

/*-------------------------------------------------------------------*/
00130 void HpiDspCode_Close(
      struct dsp_code *psDspCode
)
{
      if (psDspCode->psFirmware != NULL) {
            HPI_DEBUG_LOG(DEBUG, "Dsp code closed\n");
            release_firmware(psDspCode->psFirmware);
            psDspCode->psFirmware = NULL;
      }
}

/*-------------------------------------------------------------------*/
00142 void HpiDspCode_Rewind(
      struct dsp_code *psDspCode
)
{
      /* Go back to start of  data, after header */
      psDspCode->dwWordCount = sizeof(struct code_header) / sizeof(u32);
}

/*-------------------------------------------------------------------*/
00151 short HpiDspCode_ReadWord(
      struct dsp_code *psDspCode,
      u32 *pdwWord
)
{
      if (psDspCode->dwWordCount + 1 > psDspCode->dwBlockLength)
            return (HPI_ERROR_DSP_FILE_FORMAT);

      *pdwWord =
            ((u32 *)(psDspCode->psFirmware->data))[psDspCode->
            dwWordCount];
      psDspCode->dwWordCount++;
      return 0;
}

/*-------------------------------------------------------------------*/
00167 short HpiDspCode_ReadBlock(
      size_t nWordsRequested,
      struct dsp_code *psDspCode,
      u32 **ppdwBlock
)
{
      if (psDspCode->dwWordCount + nWordsRequested >
            psDspCode->dwBlockLength)
            return (HPI_ERROR_DSP_FILE_FORMAT);

      *ppdwBlock =
            ((u32 *)(psDspCode->psFirmware->data)) +
            psDspCode->dwWordCount;
      psDspCode->dwWordCount += nWordsRequested;
      return (0);
}

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