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
|
// SPDX-License-Identifier: GPL-2.0
/*
* mtk-afe-platform-driver.c -- Mediatek afe platform driver
*
* Copyright (c) 2016 MediaTek Inc.
* Author: Garlic Tseng <garlic.tseng@mediatek.com>
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <sound/soc.h>
#include "mtk-afe-platform-driver.h"
#include "mtk-base-afe.h"
static snd_pcm_uframes_t mtk_afe_pcm_pointer
(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
const struct mtk_base_memif_data *memif_data = memif->data;
struct regmap *regmap = afe->regmap;
struct device *dev = afe->dev;
int reg_ofs_base = memif_data->reg_ofs_base;
int reg_ofs_cur = memif_data->reg_ofs_cur;
unsigned int hw_ptr = 0, hw_base = 0;
int ret, pcm_ptr_bytes;
ret = regmap_read(regmap, reg_ofs_cur, &hw_ptr);
if (ret || hw_ptr == 0) {
dev_err(dev, "%s hw_ptr err\n", __func__);
pcm_ptr_bytes = 0;
goto POINTER_RETURN_FRAMES;
}
ret = regmap_read(regmap, reg_ofs_base, &hw_base);
if (ret || hw_base == 0) {
dev_err(dev, "%s hw_ptr err\n", __func__);
pcm_ptr_bytes = 0;
goto POINTER_RETURN_FRAMES;
}
pcm_ptr_bytes = hw_ptr - hw_base;
POINTER_RETURN_FRAMES:
return bytes_to_frames(substream->runtime, pcm_ptr_bytes);
}
static const struct snd_pcm_ops mtk_afe_pcm_ops = {
.ioctl = snd_pcm_lib_ioctl,
.pointer = mtk_afe_pcm_pointer,
};
static int mtk_afe_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
size_t size;
struct snd_pcm *pcm = rtd->pcm;
struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
size = afe->mtk_afe_hardware->buffer_bytes_max;
return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
afe->dev,
size, size);
}
static void mtk_afe_pcm_free(struct snd_pcm *pcm)
{
snd_pcm_lib_preallocate_free_for_all(pcm);
}
const struct snd_soc_component_driver mtk_afe_pcm_platform = {
.name = AFE_PCM_NAME,
.ops = &mtk_afe_pcm_ops,
.pcm_new = mtk_afe_pcm_new,
.pcm_free = mtk_afe_pcm_free,
};
EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform);
MODULE_DESCRIPTION("Mediatek simple platform driver");
MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
MODULE_LICENSE("GPL v2");
|
