1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2020 Intel Corporation
3
4 /*
5 * sof_sdw_rt1308 - Helpers to handle RT1308 from generic machine driver
6 */
7
8 #include <linux/device.h>
9 #include <linux/errno.h>
10 #include <sound/control.h>
11 #include <sound/soc.h>
12 #include <sound/soc-acpi.h>
13 #include <sound/soc-dapm.h>
14 #include "sof_sdw_common.h"
15 #include "../../codecs/rt1308.h"
16
17 static const struct snd_soc_dapm_widget rt1308_widgets[] = {
18 SND_SOC_DAPM_SPK("Speaker", NULL),
19 };
20
21 /*
22 * dapm routes for rt1308 will be registered dynamically according
23 * to the number of rt1308 used. The first two entries will be registered
24 * for one codec case, and the last two entries are also registered
25 * if two 1308s are used.
26 */
27 static const struct snd_soc_dapm_route rt1308_map[] = {
28 { "Speaker", NULL, "rt1308-1 SPOL" },
29 { "Speaker", NULL, "rt1308-1 SPOR" },
30 { "Speaker", NULL, "rt1308-2 SPOL" },
31 { "Speaker", NULL, "rt1308-2 SPOR" },
32 };
33
34 static const struct snd_kcontrol_new rt1308_controls[] = {
35 SOC_DAPM_PIN_SWITCH("Speaker"),
36 };
37
first_spk_init(struct snd_soc_pcm_runtime * rtd)38 static int first_spk_init(struct snd_soc_pcm_runtime *rtd)
39 {
40 struct snd_soc_card *card = rtd->card;
41 int ret;
42
43 card->components = devm_kasprintf(card->dev, GFP_KERNEL,
44 "%s spk:rt1308",
45 card->components);
46 if (!card->components)
47 return -ENOMEM;
48
49 ret = snd_soc_add_card_controls(card, rt1308_controls,
50 ARRAY_SIZE(rt1308_controls));
51 if (ret) {
52 dev_err(card->dev, "rt1308 controls addition failed: %d\n", ret);
53 return ret;
54 }
55
56 ret = snd_soc_dapm_new_controls(&card->dapm, rt1308_widgets,
57 ARRAY_SIZE(rt1308_widgets));
58 if (ret) {
59 dev_err(card->dev, "rt1308 widgets addition failed: %d\n", ret);
60 return ret;
61 }
62
63 ret = snd_soc_dapm_add_routes(&card->dapm, rt1308_map, 2);
64 if (ret)
65 dev_err(rtd->dev, "failed to add first SPK map: %d\n", ret);
66
67 return ret;
68 }
69
second_spk_init(struct snd_soc_pcm_runtime * rtd)70 static int second_spk_init(struct snd_soc_pcm_runtime *rtd)
71 {
72 struct snd_soc_card *card = rtd->card;
73 int ret;
74
75 ret = snd_soc_dapm_add_routes(&card->dapm, rt1308_map + 2, 2);
76 if (ret)
77 dev_err(rtd->dev, "failed to add second SPK map: %d\n", ret);
78
79 return ret;
80 }
81
all_spk_init(struct snd_soc_pcm_runtime * rtd)82 static int all_spk_init(struct snd_soc_pcm_runtime *rtd)
83 {
84 int ret;
85
86 ret = first_spk_init(rtd);
87 if (ret)
88 return ret;
89
90 return second_spk_init(rtd);
91 }
92
rt1308_i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)93 static int rt1308_i2s_hw_params(struct snd_pcm_substream *substream,
94 struct snd_pcm_hw_params *params)
95 {
96 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
97 struct snd_soc_card *card = rtd->card;
98 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
99 int clk_id, clk_freq, pll_out;
100 int err;
101
102 clk_id = RT1308_PLL_S_MCLK;
103 clk_freq = 38400000;
104
105 pll_out = params_rate(params) * 512;
106
107 /* Set rt1308 pll */
108 err = snd_soc_dai_set_pll(codec_dai, 0, clk_id, clk_freq, pll_out);
109 if (err < 0) {
110 dev_err(card->dev, "Failed to set RT1308 PLL: %d\n", err);
111 return err;
112 }
113
114 /* Set rt1308 sysclk */
115 err = snd_soc_dai_set_sysclk(codec_dai, RT1308_FS_SYS_S_PLL, pll_out,
116 SND_SOC_CLOCK_IN);
117 if (err < 0) {
118 dev_err(card->dev, "Failed to set RT1308 SYSCLK: %d\n", err);
119 return err;
120 }
121
122 return 0;
123 }
124
125 /* machine stream operations */
126 struct snd_soc_ops sof_sdw_rt1308_i2s_ops = {
127 .hw_params = rt1308_i2s_hw_params,
128 };
129
sof_sdw_rt1308_init(struct snd_soc_card * card,const struct snd_soc_acpi_link_adr * link,struct snd_soc_dai_link * dai_links,struct sof_sdw_codec_info * info,bool playback)130 int sof_sdw_rt1308_init(struct snd_soc_card *card,
131 const struct snd_soc_acpi_link_adr *link,
132 struct snd_soc_dai_link *dai_links,
133 struct sof_sdw_codec_info *info,
134 bool playback)
135 {
136 /* Count amp number and do init on playback link only. */
137 if (!playback)
138 return 0;
139
140 info->amp_num++;
141 if (info->amp_num == 1)
142 dai_links->init = first_spk_init;
143
144 if (info->amp_num == 2) {
145 /*
146 * if two 1308s are in one dai link, the init function
147 * in this dai link will be first set for the first speaker,
148 * and it should be reset to initialize all speakers when
149 * the second speaker is found.
150 */
151 if (dai_links->init)
152 dai_links->init = all_spk_init;
153 else
154 dai_links->init = second_spk_init;
155 }
156
157 return 0;
158 }
159