~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/atmel/atmel_wm8904.c

Version: ~ [ linux-5.11-rc1 ] ~ [ linux-5.10.4 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.86 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.164 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.213 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.249 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.249 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec.
  4  *
  5  * Copyright (C) 2012 Atmel
  6  *
  7  * Author: Bo Shen <voice.shen@atmel.com>
  8  */
  9 
 10 #include <linux/clk.h>
 11 #include <linux/module.h>
 12 #include <linux/of.h>
 13 #include <linux/of_device.h>
 14 
 15 #include <sound/soc.h>
 16 
 17 #include "../codecs/wm8904.h"
 18 #include "atmel_ssc_dai.h"
 19 
 20 static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {
 21         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 22         SND_SOC_DAPM_MIC("Mic", NULL),
 23         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 24 };
 25 
 26 static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream,
 27                 struct snd_pcm_hw_params *params)
 28 {
 29         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 30         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 31         int ret;
 32 
 33         ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,
 34                 32768, params_rate(params) * 256);
 35         if (ret < 0) {
 36                 pr_err("%s - failed to set wm8904 codec PLL.", __func__);
 37                 return ret;
 38         }
 39 
 40         /*
 41          * As here wm8904 use FLL output as its system clock
 42          * so calling set_sysclk won't care freq parameter
 43          * then we pass 0
 44          */
 45         ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,
 46                         0, SND_SOC_CLOCK_IN);
 47         if (ret < 0) {
 48                 pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);
 49                 return ret;
 50         }
 51 
 52         return 0;
 53 }
 54 
 55 static const struct snd_soc_ops atmel_asoc_wm8904_ops = {
 56         .hw_params = atmel_asoc_wm8904_hw_params,
 57 };
 58 
 59 SND_SOC_DAILINK_DEFS(pcm,
 60         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 61         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi")),
 62         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 63 
 64 static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {
 65         .name = "WM8904",
 66         .stream_name = "WM8904 PCM",
 67         .dai_fmt = SND_SOC_DAIFMT_I2S
 68                 | SND_SOC_DAIFMT_NB_NF
 69                 | SND_SOC_DAIFMT_CBM_CFM,
 70         .ops = &atmel_asoc_wm8904_ops,
 71         SND_SOC_DAILINK_REG(pcm),
 72 };
 73 
 74 static struct snd_soc_card atmel_asoc_wm8904_card = {
 75         .name = "atmel_asoc_wm8904",
 76         .owner = THIS_MODULE,
 77         .dai_link = &atmel_asoc_wm8904_dailink,
 78         .num_links = 1,
 79         .dapm_widgets = atmel_asoc_wm8904_dapm_widgets,
 80         .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),
 81         .fully_routed = true,
 82 };
 83 
 84 static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev)
 85 {
 86         struct device_node *np = pdev->dev.of_node;
 87         struct device_node *codec_np, *cpu_np;
 88         struct snd_soc_card *card = &atmel_asoc_wm8904_card;
 89         struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
 90         int ret;
 91 
 92         if (!np) {
 93                 dev_err(&pdev->dev, "only device tree supported\n");
 94                 return -EINVAL;
 95         }
 96 
 97         ret = snd_soc_of_parse_card_name(card, "atmel,model");
 98         if (ret) {
 99                 dev_err(&pdev->dev, "failed to parse card name\n");
100                 return ret;
101         }
102 
103         ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
104         if (ret) {
105                 dev_err(&pdev->dev, "failed to parse audio routing\n");
106                 return ret;
107         }
108 
109         cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
110         if (!cpu_np) {
111                 dev_err(&pdev->dev, "failed to get dai and pcm info\n");
112                 ret = -EINVAL;
113                 return ret;
114         }
115         dailink->cpus->of_node = cpu_np;
116         dailink->platforms->of_node = cpu_np;
117         of_node_put(cpu_np);
118 
119         codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
120         if (!codec_np) {
121                 dev_err(&pdev->dev, "failed to get codec info\n");
122                 ret = -EINVAL;
123                 return ret;
124         }
125         dailink->codecs->of_node = codec_np;
126         of_node_put(codec_np);
127 
128         return 0;
129 }
130 
131 static int atmel_asoc_wm8904_probe(struct platform_device *pdev)
132 {
133         struct snd_soc_card *card = &atmel_asoc_wm8904_card;
134         struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
135         int id, ret;
136 
137         card->dev = &pdev->dev;
138         ret = atmel_asoc_wm8904_dt_init(pdev);
139         if (ret) {
140                 dev_err(&pdev->dev, "failed to init dt info\n");
141                 return ret;
142         }
143 
144         id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");
145         ret = atmel_ssc_set_audio(id);
146         if (ret != 0) {
147                 dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);
148                 return ret;
149         }
150 
151         ret = snd_soc_register_card(card);
152         if (ret) {
153                 dev_err(&pdev->dev, "snd_soc_register_card failed\n");
154                 goto err_set_audio;
155         }
156 
157         return 0;
158 
159 err_set_audio:
160         atmel_ssc_put_audio(id);
161         return ret;
162 }
163 
164 static int atmel_asoc_wm8904_remove(struct platform_device *pdev)
165 {
166         struct snd_soc_card *card = platform_get_drvdata(pdev);
167         struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
168         int id;
169 
170         id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc");
171 
172         snd_soc_unregister_card(card);
173         atmel_ssc_put_audio(id);
174 
175         return 0;
176 }
177 
178 #ifdef CONFIG_OF
179 static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {
180         { .compatible = "atmel,asoc-wm8904", },
181         { }
182 };
183 MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids);
184 #endif
185 
186 static struct platform_driver atmel_asoc_wm8904_driver = {
187         .driver = {
188                 .name = "atmel-wm8904-audio",
189                 .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
190                 .pm             = &snd_soc_pm_ops,
191         },
192         .probe = atmel_asoc_wm8904_probe,
193         .remove = atmel_asoc_wm8904_remove,
194 };
195 
196 module_platform_driver(atmel_asoc_wm8904_driver);
197 
198 /* Module information */
199 MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
200 MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");
201 MODULE_LICENSE("GPL");
202 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp