1 /***********************************************************************
3 AudioScience HPI driver
4 Functions for reading DSP code using hotplug firmware loader
6 Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of version 2 of the GNU General Public License as
10 published by the Free Software Foundation;
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 ***********************************************************************/
22 #define SOURCEFILE_NAME "hpidspcd.c"
25 #include "hpi_version.h"
27 struct dsp_code_private {
28 /** Firmware descriptor */
29 const struct firmware *firmware;
33 /*-------------------------------------------------------------------*/
34 short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
37 const struct firmware *firmware;
38 struct pci_dev *dev = os_data;
39 struct code_header header;
41 short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND;
44 sprintf(fw_name, "asihpi/dsp%04x.bin", adapter);
46 err = request_firmware(&firmware, fw_name, &dev->dev);
48 if (err || !firmware) {
49 dev_err(&dev->dev, "%d, request_firmware failed for %s\n",
53 if (firmware->size < sizeof(header)) {
54 dev_err(&dev->dev, "Header size too small %s\n", fw_name);
57 memcpy(&header, firmware->data, sizeof(header));
59 if ((header.type != 0x45444F43) || /* "CODE" */
60 (header.adapter != adapter)
61 || (header.size != firmware->size)) {
63 "Invalid firmware header size %d != file %zd\n",
64 header.size, firmware->size);
68 if (HPI_VER_MAJOR(header.version) != HPI_VER_MAJOR(HPI_VER)) {
69 /* Major version change probably means Host-DSP protocol change */
71 "Incompatible firmware version DSP image %X != Driver %X\n",
72 header.version, HPI_VER);
76 if (header.version != HPI_VER) {
78 "Firmware version mismatch: DSP image %X != Driver %X\n",
79 header.version, HPI_VER);
82 HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
83 dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
85 err_ret = HPI_ERROR_MEMORY_ALLOC;
89 dsp_code->pvt->dev = dev;
90 dsp_code->pvt->firmware = firmware;
91 dsp_code->header = header;
92 dsp_code->block_length = header.size / sizeof(u32);
93 dsp_code->word_count = sizeof(header) / sizeof(u32);
97 release_firmware(firmware);
99 dsp_code->block_length = 0;
103 /*-------------------------------------------------------------------*/
104 void hpi_dsp_code_close(struct dsp_code *dsp_code)
106 HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
107 release_firmware(dsp_code->pvt->firmware);
108 kfree(dsp_code->pvt);
111 /*-------------------------------------------------------------------*/
112 void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
114 /* Go back to start of data, after header */
115 dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
118 /*-------------------------------------------------------------------*/
119 short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
121 if (dsp_code->word_count + 1 > dsp_code->block_length)
122 return HPI_ERROR_DSP_FILE_FORMAT;
124 *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
126 dsp_code->word_count++;
130 /*-------------------------------------------------------------------*/
131 short hpi_dsp_code_read_block(size_t words_requested,
132 struct dsp_code *dsp_code, u32 **ppblock)
134 if (dsp_code->word_count + words_requested > dsp_code->block_length)
135 return HPI_ERROR_DSP_FILE_FORMAT;
138 ((u32 *)(dsp_code->pvt->firmware->data)) +
139 dsp_code->word_count;
140 dsp_code->word_count += words_requested;