1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * mtk-afe-platform-driver.c  --  Mediatek afe platform driver
4  *
5  * Copyright (c) 2016 MediaTek Inc.
6  * Author: Garlic Tseng <garlic.tseng@mediatek.com>
7  */
8 
9 #include <linux/module.h>
10 #include <linux/dma-mapping.h>
11 #include <sound/soc.h>
12 
13 #include "mtk-afe-platform-driver.h"
14 #include "mtk-base-afe.h"
15 
16 int mtk_afe_combine_sub_dai(struct mtk_base_afe *afe)
17 {
18 	struct mtk_base_afe_dai *dai;
19 	size_t num_dai_drivers = 0, dai_idx = 0;
20 
21 	/* calcualte total dai driver size */
22 	list_for_each_entry(dai, &afe->sub_dais, list) {
23 		num_dai_drivers += dai->num_dai_drivers;
24 	}
25 
26 	dev_info(afe->dev, "%s(), num of dai %zd\n", __func__, num_dai_drivers);
27 
28 	/* combine sub_dais */
29 	afe->num_dai_drivers = num_dai_drivers;
30 	afe->dai_drivers = devm_kcalloc(afe->dev,
31 					num_dai_drivers,
32 					sizeof(struct snd_soc_dai_driver),
33 					GFP_KERNEL);
34 	if (!afe->dai_drivers)
35 		return -ENOMEM;
36 
37 	list_for_each_entry(dai, &afe->sub_dais, list) {
38 		/* dai driver */
39 		memcpy(&afe->dai_drivers[dai_idx],
40 		       dai->dai_drivers,
41 		       dai->num_dai_drivers *
42 		       sizeof(struct snd_soc_dai_driver));
43 		dai_idx += dai->num_dai_drivers;
44 	}
45 	return 0;
46 }
47 EXPORT_SYMBOL_GPL(mtk_afe_combine_sub_dai);
48 
49 int mtk_afe_add_sub_dai_control(struct snd_soc_component *component)
50 {
51 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
52 	struct mtk_base_afe_dai *dai;
53 
54 	list_for_each_entry(dai, &afe->sub_dais, list) {
55 		if (dai->controls)
56 			snd_soc_add_component_controls(component,
57 						       dai->controls,
58 						       dai->num_controls);
59 
60 		if (dai->dapm_widgets)
61 			snd_soc_dapm_new_controls(&component->dapm,
62 						  dai->dapm_widgets,
63 						  dai->num_dapm_widgets);
64 	}
65 	/* add routes after all widgets are added */
66 	list_for_each_entry(dai, &afe->sub_dais, list) {
67 		if (dai->dapm_routes)
68 			snd_soc_dapm_add_routes(&component->dapm,
69 						dai->dapm_routes,
70 						dai->num_dapm_routes);
71 	}
72 
73 	snd_soc_dapm_new_widgets(component->dapm.card);
74 
75 	return 0;
76 
77 }
78 EXPORT_SYMBOL_GPL(mtk_afe_add_sub_dai_control);
79 
80 static snd_pcm_uframes_t mtk_afe_pcm_pointer
81 			 (struct snd_pcm_substream *substream)
82 {
83 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
84 	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
85 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
86 	struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
87 	const struct mtk_base_memif_data *memif_data = memif->data;
88 	struct regmap *regmap = afe->regmap;
89 	struct device *dev = afe->dev;
90 	int reg_ofs_base = memif_data->reg_ofs_base;
91 	int reg_ofs_cur = memif_data->reg_ofs_cur;
92 	unsigned int hw_ptr = 0, hw_base = 0;
93 	int ret, pcm_ptr_bytes;
94 
95 	ret = regmap_read(regmap, reg_ofs_cur, &hw_ptr);
96 	if (ret || hw_ptr == 0) {
97 		dev_err(dev, "%s hw_ptr err\n", __func__);
98 		pcm_ptr_bytes = 0;
99 		goto POINTER_RETURN_FRAMES;
100 	}
101 
102 	ret = regmap_read(regmap, reg_ofs_base, &hw_base);
103 	if (ret || hw_base == 0) {
104 		dev_err(dev, "%s hw_ptr err\n", __func__);
105 		pcm_ptr_bytes = 0;
106 		goto POINTER_RETURN_FRAMES;
107 	}
108 
109 	pcm_ptr_bytes = hw_ptr - hw_base;
110 
111 POINTER_RETURN_FRAMES:
112 	return bytes_to_frames(substream->runtime, pcm_ptr_bytes);
113 }
114 
115 const struct snd_pcm_ops mtk_afe_pcm_ops = {
116 	.ioctl = snd_pcm_lib_ioctl,
117 	.pointer = mtk_afe_pcm_pointer,
118 };
119 EXPORT_SYMBOL_GPL(mtk_afe_pcm_ops);
120 
121 int mtk_afe_pcm_new(struct snd_soc_pcm_runtime *rtd)
122 {
123 	size_t size;
124 	struct snd_pcm *pcm = rtd->pcm;
125 	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
126 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component);
127 
128 	size = afe->mtk_afe_hardware->buffer_bytes_max;
129 	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
130 					      afe->dev, size, size);
131 	return 0;
132 }
133 EXPORT_SYMBOL_GPL(mtk_afe_pcm_new);
134 
135 void mtk_afe_pcm_free(struct snd_pcm *pcm)
136 {
137 	snd_pcm_lib_preallocate_free_for_all(pcm);
138 }
139 EXPORT_SYMBOL_GPL(mtk_afe_pcm_free);
140 
141 const struct snd_soc_component_driver mtk_afe_pcm_platform = {
142 	.name = AFE_PCM_NAME,
143 	.ops = &mtk_afe_pcm_ops,
144 	.pcm_new = mtk_afe_pcm_new,
145 	.pcm_free = mtk_afe_pcm_free,
146 };
147 EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform);
148 
149 MODULE_DESCRIPTION("Mediatek simple platform driver");
150 MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
151 MODULE_LICENSE("GPL v2");
152 
153