diff options
Diffstat (limited to 'kernel/sound/pci/asihpi/hpidspcd.c')
| -rw-r--r-- | kernel/sound/pci/asihpi/hpidspcd.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/kernel/sound/pci/asihpi/hpidspcd.c b/kernel/sound/pci/asihpi/hpidspcd.c new file mode 100644 index 000000000..3603c24f3 --- /dev/null +++ b/kernel/sound/pci/asihpi/hpidspcd.c @@ -0,0 +1,142 @@ +/*********************************************************************** + + AudioScience HPI driver + Functions for reading DSP code using hotplug firmware loader + + Copyright (C) 1997-2014 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 + +***********************************************************************/ +#define SOURCEFILE_NAME "hpidspcd.c" +#include "hpidspcd.h" +#include "hpidebug.h" +#include "hpi_version.h" + +struct dsp_code_private { + /** Firmware descriptor */ + const struct firmware *firmware; + struct pci_dev *dev; +}; + +/*-------------------------------------------------------------------*/ +short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code, + u32 *os_error_code) +{ + const struct firmware *firmware; + struct pci_dev *dev = os_data; + struct code_header header; + char fw_name[20]; + short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND; + int err; + + sprintf(fw_name, "asihpi/dsp%04x.bin", adapter); + + err = request_firmware(&firmware, fw_name, &dev->dev); + + if (err || !firmware) { + dev_err(&dev->dev, "%d, request_firmware failed for %s\n", + err, fw_name); + goto error1; + } + if (firmware->size < sizeof(header)) { + dev_err(&dev->dev, "Header size too small %s\n", fw_name); + goto error2; + } + memcpy(&header, firmware->data, sizeof(header)); + + if ((header.type != 0x45444F43) || /* "CODE" */ + (header.adapter != adapter) + || (header.size != firmware->size)) { + dev_err(&dev->dev, + "Invalid firmware header size %d != file %zd\n", + header.size, firmware->size); + goto error2; + } + + if (HPI_VER_MAJOR(header.version) != HPI_VER_MAJOR(HPI_VER)) { + /* Major version change probably means Host-DSP protocol change */ + dev_err(&dev->dev, + "Incompatible firmware version DSP image %X != Driver %X\n", + header.version, HPI_VER); + goto error2; + } + + if (header.version != HPI_VER) { + dev_warn(&dev->dev, + "Firmware version mismatch: DSP image %X != Driver %X\n", + header.version, HPI_VER); + } + + HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name); + dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL); + if (!dsp_code->pvt) { + err_ret = HPI_ERROR_MEMORY_ALLOC; + goto error2; + } + + dsp_code->pvt->dev = dev; + dsp_code->pvt->firmware = firmware; + dsp_code->header = header; + dsp_code->block_length = header.size / sizeof(u32); + dsp_code->word_count = sizeof(header) / sizeof(u32); + return 0; + +error2: + release_firmware(firmware); +error1: + dsp_code->block_length = 0; + return err_ret; +} + +/*-------------------------------------------------------------------*/ +void hpi_dsp_code_close(struct dsp_code *dsp_code) +{ + HPI_DEBUG_LOG(DEBUG, "dsp code closed\n"); + release_firmware(dsp_code->pvt->firmware); + kfree(dsp_code->pvt); +} + +/*-------------------------------------------------------------------*/ +void hpi_dsp_code_rewind(struct dsp_code *dsp_code) +{ + /* Go back to start of data, after header */ + dsp_code->word_count = sizeof(struct code_header) / sizeof(u32); +} + +/*-------------------------------------------------------------------*/ +short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword) +{ + if (dsp_code->word_count + 1 > dsp_code->block_length) + return HPI_ERROR_DSP_FILE_FORMAT; + + *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code-> + word_count]; + dsp_code->word_count++; + return 0; +} + +/*-------------------------------------------------------------------*/ +short hpi_dsp_code_read_block(size_t words_requested, + struct dsp_code *dsp_code, u32 **ppblock) +{ + if (dsp_code->word_count + words_requested > dsp_code->block_length) + return HPI_ERROR_DSP_FILE_FORMAT; + + *ppblock = + ((u32 *)(dsp_code->pvt->firmware->data)) + + dsp_code->word_count; + dsp_code->word_count += words_requested; + return 0; +} |