Linux 6.7-rc7
[linux-modified.git] / sound / soc / meson / gx-card.c
1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 //
3 // Copyright (c) 2020 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5
6 #include <linux/module.h>
7 #include <linux/of_platform.h>
8 #include <sound/soc.h>
9 #include <sound/soc-dai.h>
10
11 #include "meson-card.h"
12
13 struct gx_dai_link_i2s_data {
14         unsigned int mclk_fs;
15 };
16
17 /*
18  * Base params for the codec to codec links
19  * Those will be over-written by the CPU side of the link
20  */
21 static const struct snd_soc_pcm_stream codec_params = {
22         .formats = SNDRV_PCM_FMTBIT_S24_LE,
23         .rate_min = 5525,
24         .rate_max = 192000,
25         .channels_min = 1,
26         .channels_max = 8,
27 };
28
29 static int gx_card_i2s_be_hw_params(struct snd_pcm_substream *substream,
30                                     struct snd_pcm_hw_params *params)
31 {
32         struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
33         struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);
34         struct gx_dai_link_i2s_data *be =
35                 (struct gx_dai_link_i2s_data *)priv->link_data[rtd->num];
36
37         return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);
38 }
39
40 static const struct snd_soc_ops gx_card_i2s_be_ops = {
41         .hw_params = gx_card_i2s_be_hw_params,
42 };
43
44 static int gx_card_parse_i2s(struct snd_soc_card *card,
45                              struct device_node *node,
46                              int *index)
47 {
48         struct meson_card *priv = snd_soc_card_get_drvdata(card);
49         struct snd_soc_dai_link *link = &card->dai_link[*index];
50         struct gx_dai_link_i2s_data *be;
51
52         /* Allocate i2s link parameters */
53         be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
54         if (!be)
55                 return -ENOMEM;
56         priv->link_data[*index] = be;
57
58         /* Setup i2s link */
59         link->ops = &gx_card_i2s_be_ops;
60         link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);
61
62         of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
63
64         return 0;
65 }
66
67 static int gx_card_cpu_identify(struct snd_soc_dai_link_component *c,
68                                 char *match)
69 {
70         if (of_device_is_compatible(c->of_node, DT_PREFIX "aiu")) {
71                 if (strstr(c->dai_name, match))
72                         return 1;
73         }
74
75         /* dai not matched */
76         return 0;
77 }
78
79 static int gx_card_add_link(struct snd_soc_card *card, struct device_node *np,
80                             int *index)
81 {
82         struct snd_soc_dai_link *dai_link = &card->dai_link[*index];
83         struct snd_soc_dai_link_component *cpu;
84         int ret;
85
86         cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);
87         if (!cpu)
88                 return -ENOMEM;
89
90         dai_link->cpus = cpu;
91         dai_link->num_cpus = 1;
92
93         ret = meson_card_parse_dai(card, np, dai_link->cpus);
94         if (ret)
95                 return ret;
96
97         if (gx_card_cpu_identify(dai_link->cpus, "FIFO"))
98                 return  meson_card_set_fe_link(card, dai_link, np, true);
99
100         ret = meson_card_set_be_link(card, dai_link, np);
101         if (ret)
102                 return ret;
103
104         /* Or apply codec to codec params if necessary */
105         if (gx_card_cpu_identify(dai_link->cpus, "CODEC CTRL")) {
106                 dai_link->c2c_params = &codec_params;
107                 dai_link->num_c2c_params = 1;
108         } else {
109                 dai_link->no_pcm = 1;
110                 snd_soc_dai_link_set_capabilities(dai_link);
111                 /* Check if the cpu is the i2s encoder and parse i2s data */
112                 if (gx_card_cpu_identify(dai_link->cpus, "I2S Encoder"))
113                         ret = gx_card_parse_i2s(card, np, index);
114         }
115
116         return ret;
117 }
118
119 static const struct meson_card_match_data gx_card_match_data = {
120         .add_link = gx_card_add_link,
121 };
122
123 static const struct of_device_id gx_card_of_match[] = {
124         {
125                 .compatible = "amlogic,gx-sound-card",
126                 .data = &gx_card_match_data,
127         }, {}
128 };
129 MODULE_DEVICE_TABLE(of, gx_card_of_match);
130
131 static struct platform_driver gx_card_pdrv = {
132         .probe = meson_card_probe,
133         .remove_new = meson_card_remove,
134         .driver = {
135                 .name = "gx-sound-card",
136                 .of_match_table = gx_card_of_match,
137         },
138 };
139 module_platform_driver(gx_card_pdrv);
140
141 MODULE_DESCRIPTION("Amlogic GX ALSA machine driver");
142 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
143 MODULE_LICENSE("GPL v2");