summaryrefslogtreecommitdiff
path: root/sound/pci/asihpi/hpidspcd.c
blob: 9acc0ac75ecae21f49bf4c1dc1ed8e9837ab7888 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
// SPDX-License-Identifier: GPL-2.0-only
/***********************************************************************

    AudioScience HPI driver
    Functions for reading DSP code using hotplug firmware loader

    Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>


***********************************************************************/
#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;
}