tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ASoC: SOF: Intel: Add legacy IPC support
Add IPC support required for devices introduced before Skylake
(Merrifield, baytrail, CherryTrail, Haswell, Broadwell)
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
authored by
Guennadi Liakhovetski
and committed by
Mark Brown
351d1174
458bc729
+92
+92
sound/soc/sof/intel/intel-ipc.c
+92
sound/soc/sof/intel/intel-ipc.c
···
1
+
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2
+
//
3
+
// This file is provided under a dual BSD/GPLv2 license. When using or
4
+
// redistributing this file, you may do so under either license.
5
+
//
6
+
// Copyright(c) 2019 Intel Corporation. All rights reserved.
7
+
//
8
+
// Authors: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
9
+
10
+
/* Intel-specific SOF IPC code */
11
+
12
+
#include <linux/device.h>
13
+
#include <linux/export.h>
14
+
#include <linux/module.h>
15
+
#include <linux/types.h>
16
+
17
+
#include <sound/pcm.h>
18
+
#include <sound/sof/stream.h>
19
+
20
+
#include "../ops.h"
21
+
#include "../sof-priv.h"
22
+
23
+
struct intel_stream {
24
+
size_t posn_offset;
25
+
};
26
+
27
+
/* Mailbox-based Intel IPC implementation */
28
+
void intel_ipc_msg_data(struct snd_sof_dev *sdev,
29
+
struct snd_pcm_substream *substream,
30
+
void *p, size_t sz)
31
+
{
32
+
if (!substream || !sdev->stream_box.size) {
33
+
sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz);
34
+
} else {
35
+
struct intel_stream *stream = substream->runtime->private_data;
36
+
37
+
/* The stream might already be closed */
38
+
if (stream)
39
+
sof_mailbox_read(sdev, stream->posn_offset, p, sz);
40
+
}
41
+
}
42
+
EXPORT_SYMBOL(intel_ipc_msg_data);
43
+
44
+
int intel_ipc_pcm_params(struct snd_sof_dev *sdev,
45
+
struct snd_pcm_substream *substream,
46
+
const struct sof_ipc_pcm_params_reply *reply)
47
+
{
48
+
struct intel_stream *stream = substream->runtime->private_data;
49
+
size_t posn_offset = reply->posn_offset;
50
+
51
+
/* check if offset is overflow or it is not aligned */
52
+
if (posn_offset > sdev->stream_box.size ||
53
+
posn_offset % sizeof(struct sof_ipc_stream_posn) != 0)
54
+
return -EINVAL;
55
+
56
+
stream->posn_offset = sdev->stream_box.offset + posn_offset;
57
+
58
+
dev_dbg(sdev->dev, "pcm: stream dir %d, posn mailbox offset is %zu",
59
+
substream->stream, stream->posn_offset);
60
+
61
+
return 0;
62
+
}
63
+
EXPORT_SYMBOL(intel_ipc_pcm_params);
64
+
65
+
int intel_pcm_open(struct snd_sof_dev *sdev,
66
+
struct snd_pcm_substream *substream)
67
+
{
68
+
struct intel_stream *stream = kmalloc(sizeof(*stream), GFP_KERNEL);
69
+
70
+
if (!stream)
71
+
return -ENOMEM;
72
+
73
+
/* binding pcm substream to hda stream */
74
+
substream->runtime->private_data = stream;
75
+
76
+
return 0;
77
+
}
78
+
EXPORT_SYMBOL(intel_pcm_open);
79
+
80
+
int intel_pcm_close(struct snd_sof_dev *sdev,
81
+
struct snd_pcm_substream *substream)
82
+
{
83
+
struct intel_stream *stream = substream->runtime->private_data;
84
+
85
+
substream->runtime->private_data = NULL;
86
+
kfree(stream);
87
+
88
+
return 0;
89
+
}
90
+
EXPORT_SYMBOL(intel_pcm_close);
91
+
92
+
MODULE_LICENSE("Dual BSD/GPL");