149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/***********************************************************************/
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/**
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AudioScience HPI driver
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Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com>
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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 version 2 of the GNU General Public License as
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published by the Free Software Foundation;
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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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GNU General Public License for more details.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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\file
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Functions for reading DSP code using
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hotplug firmware loader from individual dsp code files
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*/
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/***********************************************************************/
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#define SOURCEFILE_NAME "hpidspcd.c"
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#include "hpidspcd.h"
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#include "hpidebug.h"
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#include "hpi_version.h"
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struct dsp_code_private {
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/** Firmware descriptor */
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const struct firmware *firmware;
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struct pci_dev *dev;
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};
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/*-------------------------------------------------------------------*/
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short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
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u32 *os_error_code)
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{
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const struct firmware *firmware;
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struct pci_dev *dev = os_data;
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struct code_header header;
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char fw_name[20];
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short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND;
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int err;
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sprintf(fw_name, "asihpi/dsp%04x.bin", adapter);
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err = request_firmware(&firmware, fw_name, &dev->dev);
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if (err || !firmware) {
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dev_printk(KERN_ERR, &dev->dev,
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"%d, request_firmware failed for %s\n", err,
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fw_name);
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goto error1;
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}
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if (firmware->size < sizeof(header)) {
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dev_printk(KERN_ERR, &dev->dev, "Header size too small %s\n",
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fw_name);
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goto error2;
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}
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memcpy(&header, firmware->data, sizeof(header));
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if ((header.type != 0x45444F43) || /* "CODE" */
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(header.adapter != adapter)
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|| (header.size != firmware->size)) {
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dev_printk(KERN_ERR, &dev->dev,
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"Invalid firmware header size %d != file %zd\n",
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header.size, firmware->size);
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goto error2;
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}
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if ((header.version >> 9) != (HPI_VER >> 9)) {
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/* Consider even and subsequent odd minor versions to be compatible */
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dev_printk(KERN_ERR, &dev->dev,
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"Incompatible firmware version "
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"DSP image %X != Driver %X\n", header.version,
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HPI_VER);
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goto error2;
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}
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if (header.version != HPI_VER) {
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dev_printk(KERN_INFO, &dev->dev,
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"Firmware: release version mismatch DSP image %X != Driver %X\n",
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header.version, HPI_VER);
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}
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HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
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dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
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if (!dsp_code->pvt) {
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err_ret = HPI_ERROR_MEMORY_ALLOC;
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goto error2;
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}
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dsp_code->pvt->dev = dev;
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dsp_code->pvt->firmware = firmware;
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dsp_code->header = header;
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dsp_code->block_length = header.size / sizeof(u32);
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dsp_code->word_count = sizeof(header) / sizeof(u32);
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return 0;
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error2:
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release_firmware(firmware);
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error1:
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dsp_code->block_length = 0;
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return err_ret;
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}
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/*-------------------------------------------------------------------*/
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void hpi_dsp_code_close(struct dsp_code *dsp_code)
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{
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HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
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release_firmware(dsp_code->pvt->firmware);
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kfree(dsp_code->pvt);
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}
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/*-------------------------------------------------------------------*/
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void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
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{
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/* Go back to start of data, after header */
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dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
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}
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/*-------------------------------------------------------------------*/
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short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
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{
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if (dsp_code->word_count + 1 > dsp_code->block_length)
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return HPI_ERROR_DSP_FILE_FORMAT;
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*pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
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word_count];
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dsp_code->word_count++;
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return 0;
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}
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/*-------------------------------------------------------------------*/
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short hpi_dsp_code_read_block(size_t words_requested,
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struct dsp_code *dsp_code, u32 **ppblock)
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{
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if (dsp_code->word_count + words_requested > dsp_code->block_length)
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return HPI_ERROR_DSP_FILE_FORMAT;
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*ppblock =
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((u32 *)(dsp_code->pvt->firmware->data)) +
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dsp_code->word_count;
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dsp_code->word_count += words_requested;
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return 0;
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}
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