1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-devres.c -- ALSA SoC Audio Layer devres functions
4 //
5 // Copyright (C) 2013 Linaro Ltd
6
7 #include <linux/module.h>
8 #include <linux/moduleparam.h>
9 #include <sound/soc.h>
10 #include <sound/dmaengine_pcm.h>
11
12 static void devm_dai_release(struct device *dev, void *res)
13 {
14 snd_soc_unregister_dai(*(struct snd_soc_dai **)res);
15 }
16
17 /**
18 * devm_snd_soc_register_dai - resource-managed dai registration
19 * @dev: Device used to manage component
20 * @component: The component the DAIs are registered for
21 * @dai_drv: DAI driver to use for the DAI
22 * @legacy_dai_naming: if %true, use legacy single-name format;
23 * if %false, use multiple-name format;
24 */
25 struct snd_soc_dai *devm_snd_soc_register_dai(struct device *dev,
26 struct snd_soc_component *component,
27 struct snd_soc_dai_driver *dai_drv,
28 bool legacy_dai_naming)
29 {
30 struct snd_soc_dai **ptr;
31 struct snd_soc_dai *dai;
32
33 ptr = devres_alloc(devm_dai_release, sizeof(*ptr), GFP_KERNEL);
34 if (!ptr)
35 return NULL;
36
37 dai = snd_soc_register_dai(component, dai_drv, legacy_dai_naming);
38 if (dai) {
39 *ptr = dai;
40 devres_add(dev, ptr);
41 } else {
42 devres_free(ptr);
43 }
44
45 return dai;
46 }
47 EXPORT_SYMBOL_GPL(devm_snd_soc_register_dai);
48
49 static void devm_component_release(struct device *dev, void *res)
50 {
51 const struct snd_soc_component_driver **cmpnt_drv = res;
52
53 snd_soc_unregister_component_by_driver(dev, *cmpnt_drv);
54 }
55
56 /**
57 * devm_snd_soc_register_component - resource managed component registration
58 * @dev: Device used to manage component
59 * @cmpnt_drv: Component driver
60 * @dai_drv: DAI driver
61 * @num_dai: Number of DAIs to register
62 *
63 * Register a component with automatic unregistration when the device is
64 * unregistered.
65 */
66 int devm_snd_soc_register_component(struct device *dev,
67 const struct snd_soc_component_driver *cmpnt_drv,
68 struct snd_soc_dai_driver *dai_drv, int num_dai)
69 {
70 const struct snd_soc_component_driver **ptr;
71 int ret;
72
73 ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL);
74 if (!ptr)
75 return -ENOMEM;
76
77 ret = snd_soc_register_component(dev, cmpnt_drv, dai_drv, num_dai);
78 if (ret == 0) {
79 *ptr = cmpnt_drv;
80 devres_add(dev, ptr);
81 } else {
82 devres_free(ptr);
83 }
84
85 return ret;
86 }
87 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
88
89 static void devm_card_release(struct device *dev, void *res)
90 {
91 snd_soc_unregister_card(*(struct snd_soc_card **)res);
92 }
93
94 /**
95 * devm_snd_soc_register_card - resource managed card registration
96 * @dev: Device used to manage card
97 * @card: Card to register
98 *
99 * Register a card with automatic unregistration when the device is
100 * unregistered.
101 */
102 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
103 {
104 struct snd_soc_card **ptr;
105 int ret;
106
107 ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL);
108 if (!ptr)
109 return -ENOMEM;
110
111 ret = snd_soc_register_card(card);
112 if (ret == 0) {
113 *ptr = card;
114 devres_add(dev, ptr);
115 } else {
116 devres_free(ptr);
117 }
118
119 return ret;
120 }
121 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
122
123 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
124
125 static void devm_dmaengine_pcm_release(struct device *dev, void *res)
126 {
127 snd_dmaengine_pcm_unregister(*(struct device **)res);
128 }
129
130 /**
131 * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
132 * @dev: The parent device for the PCM device
133 * @config: Platform specific PCM configuration
134 * @flags: Platform specific quirks
135 *
136 * Register a dmaengine based PCM device with automatic unregistration when the
137 * device is unregistered.
138 */
139 int devm_snd_dmaengine_pcm_register(struct device *dev,
140 const struct snd_dmaengine_pcm_config *config, unsigned int flags)
141 {
142 struct device **ptr;
143 int ret;
144
145 ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
146 if (!ptr)
147 return -ENOMEM;
148
149 ret = snd_dmaengine_pcm_register(dev, config, flags);
150 if (ret == 0) {
151 *ptr = dev;
152 devres_add(dev, ptr);
153 } else {
154 devres_free(ptr);
155 }
156
157 return ret;
158 }
159 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
160
161 #endif
162
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