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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
27struct apq8016_sbc_data {
28 void __iomem *mic_iomux;
29 void __iomem *spkr_iomux;
30 struct snd_soc_dai_link dai_link[];
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
37static 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
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
67static 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
82 num_links = of_get_child_count(node);
83
84
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
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
146static 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
181static const struct of_device_id apq8016_sbc_device_id[] = {
182 { .compatible = "qcom,apq8016-sbc-sndcard" },
183 {},
184};
185MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
186
187static 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};
194module_platform_driver(apq8016_sbc_platform_driver);
195
196MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
197MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
198MODULE_LICENSE("GPL v2");
199
