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
mtk_afe_combine_sub_dai(struct mtk_base_afe * afe)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
mtk_afe_add_sub_dai_control(struct snd_soc_component * component)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
mtk_afe_pcm_pointer(struct snd_pcm_substream * substream)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
mtk_afe_pcm_new(struct snd_soc_pcm_runtime * rtd)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 return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
130 afe->dev,
131 size, size);
132 }
133 EXPORT_SYMBOL_GPL(mtk_afe_pcm_new);
134
mtk_afe_pcm_free(struct snd_pcm * pcm)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
