1// SPDX-License-Identifier: GPL-2.0-only
2/***********************************************************************
3
4 AudioScience HPI driver
5 Functions for reading DSP code using hotplug firmware loader
6
7 Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com>
8
9
10***********************************************************************/
11#define SOURCEFILE_NAME "hpidspcd.c"
12#include "hpidspcd.h"
13#include "hpidebug.h"
14#include "hpi_version.h"
15
16struct dsp_code_private {
17 /** Firmware descriptor */
18 const struct firmware *firmware;
19 struct pci_dev *dev;
20};
21
22/*-------------------------------------------------------------------*/
23short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
24 u32 *os_error_code)
25{
26 const struct firmware *firmware;
27 struct pci_dev *dev = os_data;
28 struct code_header header;
29 char fw_name[20];
30 short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND;
31 int err;
32
33 sprintf(buf: fw_name, fmt: "asihpi/dsp%04x.bin", adapter);
34
35 err = request_firmware(fw: &firmware, name: fw_name, device: &dev->dev);
36
37 if (err || !firmware) {
38 dev_err(&dev->dev, "%d, request_firmware failed for %s\n",
39 err, fw_name);
40 goto error1;
41 }
42 if (firmware->size < sizeof(header)) {
43 dev_err(&dev->dev, "Header size too small %s\n", fw_name);
44 goto error2;
45 }
46 memcpy(&header, firmware->data, sizeof(header));
47
48 if ((header.type != 0x45444F43) || /* "CODE" */
49 (header.adapter != adapter)
50 || (header.size != firmware->size)) {
51 dev_err(&dev->dev,
52 "Invalid firmware header size %d != file %zd\n",
53 header.size, firmware->size);
54 goto error2;
55 }
56
57 if (HPI_VER_MAJOR(header.version) != HPI_VER_MAJOR(HPI_VER)) {
58 /* Major version change probably means Host-DSP protocol change */
59 dev_err(&dev->dev,
60 "Incompatible firmware version DSP image %X != Driver %X\n",
61 header.version, HPI_VER);
62 goto error2;
63 }
64
65 if (header.version != HPI_VER) {
66 dev_warn(&dev->dev,
67 "Firmware version mismatch: DSP image %X != Driver %X\n",
68 header.version, HPI_VER);
69 }
70
71 HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
72 dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
73 if (!dsp_code->pvt) {
74 err_ret = HPI_ERROR_MEMORY_ALLOC;
75 goto error2;
76 }
77
78 dsp_code->pvt->dev = dev;
79 dsp_code->pvt->firmware = firmware;
80 dsp_code->header = header;
81 dsp_code->block_length = header.size / sizeof(u32);
82 dsp_code->word_count = sizeof(header) / sizeof(u32);
83 return 0;
84
85error2:
86 release_firmware(fw: firmware);
87error1:
88 dsp_code->block_length = 0;
89 return err_ret;
90}
91
92/*-------------------------------------------------------------------*/
93void hpi_dsp_code_close(struct dsp_code *dsp_code)
94{
95 HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
96 release_firmware(fw: dsp_code->pvt->firmware);
97 kfree(objp: dsp_code->pvt);
98}
99
100/*-------------------------------------------------------------------*/
101void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
102{
103 /* Go back to start of data, after header */
104 dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
105}
106
107/*-------------------------------------------------------------------*/
108short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
109{
110 if (dsp_code->word_count + 1 > dsp_code->block_length)
111 return HPI_ERROR_DSP_FILE_FORMAT;
112
113 *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
114 word_count];
115 dsp_code->word_count++;
116 return 0;
117}
118
119/*-------------------------------------------------------------------*/
120short hpi_dsp_code_read_block(size_t words_requested,
121 struct dsp_code *dsp_code, u32 **ppblock)
122{
123 if (dsp_code->word_count + words_requested > dsp_code->block_length)
124 return HPI_ERROR_DSP_FILE_FORMAT;
125
126 *ppblock =
127 ((u32 *)(dsp_code->pvt->firmware->data)) +
128 dsp_code->word_count;
129 dsp_code->word_count += words_requested;
130 return 0;
131}
132

source code of linux/sound/pci/asihpi/hpidspcd.c