summaryrefslogtreecommitdiffstats
path: root/sound/soc/meson/axg-frddr.c
blob: a6f6f6a2eca80657d366dde459eebe5c2e1ebc7c (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
132
133
134
135
136
137
138
139
140
141
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
//
// Copyright (c) 2018 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>

/* This driver implements the frontend playback DAI of AXG based SoCs */

#include <linux/clk.h>
#include <linux/regmap.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>

#include "axg-fifo.h"

#define CTRL0_FRDDR_PP_MODE	BIT(30)

static int axg_frddr_dai_startup(struct snd_pcm_substream *substream,
				 struct snd_soc_dai *dai)
{
	struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
	unsigned int fifo_depth, fifo_threshold;
	int ret;

	/* Enable pclk to access registers and clock the fifo ip */
	ret = clk_prepare_enable(fifo->pclk);
	if (ret)
		return ret;

	/* Apply single buffer mode to the interface */
	regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_FRDDR_PP_MODE, 0);

	/*
	 * TODO: We could adapt the fifo depth and the fifo threshold
	 * depending on the expected memory throughput and lantencies
	 * For now, we'll just use the same values as the vendor kernel
	 * Depth and threshold are zero based.
	 */
	fifo_depth = AXG_FIFO_MIN_CNT - 1;
	fifo_threshold = (AXG_FIFO_MIN_CNT / 2) - 1;
	regmap_update_bits(fifo->map, FIFO_CTRL1,
			   CTRL1_FRDDR_DEPTH_MASK | CTRL1_THRESHOLD_MASK,
			   CTRL1_FRDDR_DEPTH(fifo_depth) |
			   CTRL1_THRESHOLD(fifo_threshold));

	return 0;
}

static void axg_frddr_dai_shutdown(struct snd_pcm_substream *substream,
				   struct snd_soc_dai *dai)
{
	struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);

	clk_disable_unprepare(fifo->pclk);
}

static int axg_frddr_pcm_new(struct snd_soc_pcm_runtime *rtd,
			     struct snd_soc_dai *dai)
{
	return axg_fifo_pcm_new(rtd, SNDRV_PCM_STREAM_PLAYBACK);
}

static const struct snd_soc_dai_ops axg_frddr_ops = {
	.startup	= axg_frddr_dai_startup,
	.shutdown	= axg_frddr_dai_shutdown,
};

static struct snd_soc_dai_driver axg_frddr_dai_drv = {
	.name = "FRDDR",
	.playback = {
		.stream_name	= "Playback",
		.channels_min	= 1,
		.channels_max	= AXG_FIFO_CH_MAX,
		.rates		= AXG_FIFO_RATES,
		.formats	= AXG_FIFO_FORMATS,
	},
	.ops		= &axg_frddr_ops,
	.pcm_new	= axg_frddr_pcm_new,
};

static const char * const axg_frddr_sel_texts[] = {
	"OUT 0", "OUT 1", "OUT 2", "OUT 3"
};

static SOC_ENUM_SINGLE_DECL(axg_frddr_sel_enum, FIFO_CTRL0, CTRL0_SEL_SHIFT,
			    axg_frddr_sel_texts);

static const struct snd_kcontrol_new axg_frddr_out_demux =
	SOC_DAPM_ENUM("Output Sink", axg_frddr_sel_enum);

static const struct snd_soc_dapm_widget axg_frddr_dapm_widgets[] = {
	SND_SOC_DAPM_DEMUX("SINK SEL", SND_SOC_NOPM, 0, 0,
			   &axg_frddr_out_demux),
	SND_SOC_DAPM_AIF_OUT("OUT 0", NULL, 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("OUT 1", NULL, 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("OUT 2", NULL, 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("OUT 3", NULL, 0, SND_SOC_NOPM, 0, 0),
};

static const struct snd_soc_dapm_route axg_frddr_dapm_routes[] = {
	{ "SINK SEL", NULL, "Playback" },
	{ "OUT 0", "OUT 0",  "SINK SEL" },
	{ "OUT 1", "OUT 1",  "SINK SEL" },
	{ "OUT 2", "OUT 2",  "SINK SEL" },
	{ "OUT 3", "OUT 3",  "SINK SEL" },
};

static const struct snd_soc_component_driver axg_frddr_component_drv = {
	.dapm_widgets		= axg_frddr_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(axg_frddr_dapm_widgets),
	.dapm_routes		= axg_frddr_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(axg_frddr_dapm_routes),
	.ops			= &axg_fifo_pcm_ops
};

static const struct axg_fifo_match_data axg_frddr_match_data = {
	.component_drv	= &axg_frddr_component_drv,
	.dai_drv	= &axg_frddr_dai_drv
};

static const struct of_device_id axg_frddr_of_match[] = {
	{
		.compatible = "amlogic,axg-frddr",
		.data = &axg_frddr_match_data,
	}, {}
};
MODULE_DEVICE_TABLE(of, axg_frddr_of_match);

static struct platform_driver axg_frddr_pdrv = {
	.probe = axg_fifo_probe,
	.driver = {
		.name = "axg-frddr",
		.of_match_table = axg_frddr_of_match,
	},
};
module_platform_driver(axg_frddr_pdrv);

MODULE_DESCRIPTION("Amlogic AXG playback fifo driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("GPL v2");