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bdb052e8 SK |
1 | /* |
2 | * Copyright (c) 2015 The Linux Foundation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 and | |
6 | * only version 2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/device.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/clk.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <sound/pcm.h> | |
23 | #include <sound/pcm_params.h> | |
24 | #include <sound/soc.h> | |
25 | #include <dt-bindings/sound/apq8016-lpass.h> | |
26 | ||
27 | struct apq8016_sbc_data { | |
28 | void __iomem *mic_iomux; | |
29 | void __iomem *spkr_iomux; | |
30 | struct snd_soc_dai_link dai_link[]; /* dynamically allocated */ | |
31 | }; | |
32 | ||
33 | #define MIC_CTRL_QUA_WS_SLAVE_SEL_10 BIT(17) | |
34 | #define MIC_CTRL_TLMM_SCLK_EN BIT(1) | |
35 | #define SPKR_CTL_PRI_WS_SLAVE_SEL_11 (BIT(17) | BIT(16)) | |
36 | ||
37 | static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd) | |
38 | { | |
39 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
40 | struct snd_soc_card *card = rtd->card; | |
41 | struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card); | |
42 | int rval = 0; | |
43 | ||
44 | switch (cpu_dai->id) { | |
45 | case MI2S_PRIMARY: | |
46 | writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11, | |
47 | pdata->spkr_iomux); | |
48 | break; | |
49 | ||
50 | case MI2S_QUATERNARY: | |
51 | /* Configure the Quat MI2S to TLMM */ | |
52 | writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 | | |
53 | MIC_CTRL_TLMM_SCLK_EN, | |
54 | pdata->mic_iomux); | |
55 | break; | |
56 | ||
57 | default: | |
58 | dev_err(card->dev, "unsupported cpu dai configuration\n"); | |
59 | rval = -EINVAL; | |
60 | break; | |
61 | ||
62 | } | |
63 | ||
64 | return rval; | |
65 | } | |
66 | ||
67 | static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card) | |
68 | { | |
69 | struct device *dev = card->dev; | |
70 | struct snd_soc_dai_link *link; | |
71 | struct device_node *np, *codec, *cpu, *node = dev->of_node; | |
72 | struct apq8016_sbc_data *data; | |
73 | int ret, num_links; | |
74 | ||
75 | ret = snd_soc_of_parse_card_name(card, "qcom,model"); | |
76 | if (ret) { | |
77 | dev_err(dev, "Error parsing card name: %d\n", ret); | |
78 | return ERR_PTR(ret); | |
79 | } | |
80 | ||
81 | /* Populate links */ | |
82 | num_links = of_get_child_count(node); | |
83 | ||
84 | /* Allocate the private data and the DAI link array */ | |
85 | data = devm_kzalloc(dev, sizeof(*data) + sizeof(*link) * num_links, | |
86 | GFP_KERNEL); | |
87 | if (!data) | |
88 | return ERR_PTR(-ENOMEM); | |
89 | ||
90 | card->dai_link = &data->dai_link[0]; | |
91 | card->num_links = num_links; | |
92 | ||
93 | link = data->dai_link; | |
94 | ||
95 | for_each_child_of_node(node, np) { | |
96 | cpu = of_get_child_by_name(np, "cpu"); | |
97 | codec = of_get_child_by_name(np, "codec"); | |
98 | ||
99 | if (!cpu || !codec) { | |
100 | dev_err(dev, "Can't find cpu/codec DT node\n"); | |
101 | return ERR_PTR(-EINVAL); | |
102 | } | |
103 | ||
104 | link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0); | |
105 | if (!link->cpu_of_node) { | |
106 | dev_err(card->dev, "error getting cpu phandle\n"); | |
107 | return ERR_PTR(-EINVAL); | |
108 | } | |
109 | ||
110 | link->codec_of_node = of_parse_phandle(codec, "sound-dai", 0); | |
111 | if (!link->codec_of_node) { | |
112 | dev_err(card->dev, "error getting codec phandle\n"); | |
113 | return ERR_PTR(-EINVAL); | |
114 | } | |
115 | ||
116 | ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name); | |
117 | if (ret) { | |
118 | dev_err(card->dev, "error getting cpu dai name\n"); | |
119 | return ERR_PTR(ret); | |
120 | } | |
121 | ||
122 | ret = snd_soc_of_get_dai_name(codec, &link->codec_dai_name); | |
123 | if (ret) { | |
124 | dev_err(card->dev, "error getting codec dai name\n"); | |
125 | return ERR_PTR(ret); | |
126 | } | |
127 | ||
128 | link->platform_of_node = link->cpu_of_node; | |
129 | /* For now we only support playback */ | |
130 | link->playback_only = true; | |
131 | ||
132 | ret = of_property_read_string(np, "link-name", &link->name); | |
133 | if (ret) { | |
134 | dev_err(card->dev, "error getting codec dai_link name\n"); | |
135 | return ERR_PTR(ret); | |
136 | } | |
137 | ||
138 | link->stream_name = link->name; | |
139 | link->init = apq8016_sbc_dai_init; | |
140 | link++; | |
141 | } | |
142 | ||
143 | return data; | |
144 | } | |
145 | ||
146 | static int apq8016_sbc_platform_probe(struct platform_device *pdev) | |
147 | { | |
148 | struct device *dev = &pdev->dev; | |
149 | struct snd_soc_card *card; | |
150 | struct apq8016_sbc_data *data; | |
151 | struct resource *res; | |
152 | ||
153 | card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); | |
154 | if (!card) | |
155 | return -ENOMEM; | |
156 | ||
157 | card->dev = dev; | |
158 | data = apq8016_sbc_parse_of(card); | |
159 | if (IS_ERR(data)) { | |
160 | dev_err(&pdev->dev, "Error resolving dai links: %ld\n", | |
161 | PTR_ERR(data)); | |
162 | return PTR_ERR(data); | |
163 | } | |
164 | ||
165 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux"); | |
166 | data->mic_iomux = devm_ioremap_resource(dev, res); | |
167 | if (IS_ERR(data->mic_iomux)) | |
168 | return PTR_ERR(data->mic_iomux); | |
169 | ||
170 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux"); | |
171 | data->spkr_iomux = devm_ioremap_resource(dev, res); | |
172 | if (IS_ERR(data->spkr_iomux)) | |
173 | return PTR_ERR(data->spkr_iomux); | |
174 | ||
175 | platform_set_drvdata(pdev, data); | |
176 | snd_soc_card_set_drvdata(card, data); | |
177 | ||
178 | return devm_snd_soc_register_card(&pdev->dev, card); | |
179 | } | |
180 | ||
181 | static const struct of_device_id apq8016_sbc_device_id[] = { | |
182 | { .compatible = "qcom,apq8016-sbc-sndcard" }, | |
183 | {}, | |
184 | }; | |
185 | MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id); | |
186 | ||
187 | static struct platform_driver apq8016_sbc_platform_driver = { | |
188 | .driver = { | |
189 | .name = "qcom-apq8016-sbc", | |
190 | .of_match_table = of_match_ptr(apq8016_sbc_device_id), | |
191 | }, | |
192 | .probe = apq8016_sbc_platform_probe, | |
193 | }; | |
194 | module_platform_driver(apq8016_sbc_platform_driver); | |
195 | ||
196 | MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org"); | |
197 | MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver"); | |
198 | MODULE_LICENSE("GPL v2"); |