1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ASoC driver for TI DAVINCI EVM platform
4 *
5 * Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
6 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
7 */
8
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/timer.h>
12 #include <linux/interrupt.h>
13 #include <linux/platform_device.h>
14 #include <linux/i2c.h>
15 #include <linux/of_platform.h>
16 #include <linux/clk.h>
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/soc.h>
20
21 #include <asm/dma.h>
22 #include <asm/mach-types.h>
23
24 struct snd_soc_card_drvdata_davinci {
25 struct clk *mclk;
26 unsigned sysclk;
27 };
28
29 static int evm_startup(struct snd_pcm_substream *substream)
30 {
31 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
32 struct snd_soc_card *soc_card = rtd->card;
33 struct snd_soc_card_drvdata_davinci *drvdata =
34 snd_soc_card_get_drvdata(soc_card);
35
36 if (drvdata->mclk)
37 return clk_prepare_enable(drvdata->mclk);
38
39 return 0;
40 }
41
42 static void evm_shutdown(struct snd_pcm_substream *substream)
43 {
44 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
45 struct snd_soc_card *soc_card = rtd->card;
46 struct snd_soc_card_drvdata_davinci *drvdata =
47 snd_soc_card_get_drvdata(soc_card);
48
49 clk_disable_unprepare(drvdata->mclk);
50 }
51
52 static int evm_hw_params(struct snd_pcm_substream *substream,
53 struct snd_pcm_hw_params *params)
54 {
55 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
56 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
57 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
58 struct snd_soc_card *soc_card = rtd->card;
59 int ret = 0;
60 unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
61 snd_soc_card_get_drvdata(soc_card))->sysclk;
62
63 /* set the codec system clock */
64 ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
65 if (ret < 0)
66 return ret;
67
68 /* set the CPU system clock */
69 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
70 if (ret < 0 && ret != -ENOTSUPP)
71 return ret;
72
73 return 0;
74 }
75
76 static const struct snd_soc_ops evm_ops = {
77 .startup = evm_startup,
78 .shutdown = evm_shutdown,
79 .hw_params = evm_hw_params,
80 };
81
82 /* davinci-evm machine dapm widgets */
83 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
84 SND_SOC_DAPM_HP("Headphone Jack", NULL),
85 SND_SOC_DAPM_LINE("Line Out", NULL),
86 SND_SOC_DAPM_MIC("Mic Jack", NULL),
87 SND_SOC_DAPM_LINE("Line In", NULL),
88 };
89
90 /* davinci-evm machine audio_mapnections to the codec pins */
91 static const struct snd_soc_dapm_route audio_map[] = {
92 /* Headphone connected to HPLOUT, HPROUT */
93 {"Headphone Jack", NULL, "HPLOUT"},
94 {"Headphone Jack", NULL, "HPROUT"},
95
96 /* Line Out connected to LLOUT, RLOUT */
97 {"Line Out", NULL, "LLOUT"},
98 {"Line Out", NULL, "RLOUT"},
99
100 /* Mic connected to (MIC3L | MIC3R) */
101 {"MIC3L", NULL, "Mic Bias"},
102 {"MIC3R", NULL, "Mic Bias"},
103 {"Mic Bias", NULL, "Mic Jack"},
104
105 /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
106 {"LINE1L", NULL, "Line In"},
107 {"LINE2L", NULL, "Line In"},
108 {"LINE1R", NULL, "Line In"},
109 {"LINE2R", NULL, "Line In"},
110 };
111
112 /* Logic for a aic3x as connected on a davinci-evm */
113 static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
114 {
115 struct snd_soc_card *card = rtd->card;
116 struct device_node *np = card->dev->of_node;
117 int ret;
118
119 /* Add davinci-evm specific widgets */
120 snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
121 ARRAY_SIZE(aic3x_dapm_widgets));
122
123 if (np) {
124 ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
125 if (ret)
126 return ret;
127 } else {
128 /* Set up davinci-evm specific audio path audio_map */
129 snd_soc_dapm_add_routes(&card->dapm, audio_map,
130 ARRAY_SIZE(audio_map));
131 }
132
133 /* not connected */
134 snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
135 snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
136 snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");
137
138 return 0;
139 }
140
141 /*
142 * The struct is used as place holder. It will be completely
143 * filled with data from dt node.
144 */
145 SND_SOC_DAILINK_DEFS(evm,
146 DAILINK_COMP_ARRAY(COMP_EMPTY()),
147 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
148 DAILINK_COMP_ARRAY(COMP_EMPTY()));
149
150 static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
151 .name = "TLV320AIC3X",
152 .stream_name = "AIC3X",
153 .ops = &evm_ops,
154 .init = evm_aic3x_init,
155 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
156 SND_SOC_DAIFMT_IB_NF,
157 SND_SOC_DAILINK_REG(evm),
158 };
159
160 static const struct of_device_id davinci_evm_dt_ids[] = {
161 {
162 .compatible = "ti,da830-evm-audio",
163 .data = (void *) &evm_dai_tlv320aic3x,
164 },
165 { /* sentinel */ }
166 };
167 MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
168
169 /* davinci evm audio machine driver */
170 static struct snd_soc_card evm_soc_card = {
171 .owner = THIS_MODULE,
172 .num_links = 1,
173 };
174
175 static int davinci_evm_probe(struct platform_device *pdev)
176 {
177 struct device_node *np = pdev->dev.of_node;
178 struct snd_soc_dai_link *dai;
179 struct snd_soc_card_drvdata_davinci *drvdata = NULL;
180 struct clk *mclk;
181 int ret = 0;
182
183 dai = (struct snd_soc_dai_link *) device_get_match_data(&pdev->dev);
184 if (!dai) {
185 dev_err(&pdev->dev, "Error: No device match found\n");
186 return -ENODEV;
187 }
188
189 evm_soc_card.dai_link = dai;
190
191 dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
192 if (!dai->codecs->of_node)
193 return -EINVAL;
194
195 dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
196 if (!dai->cpus->of_node)
197 return -EINVAL;
198
199 dai->platforms->of_node = dai->cpus->of_node;
200
201 evm_soc_card.dev = &pdev->dev;
202 ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
203 if (ret)
204 return ret;
205
206 mclk = devm_clk_get(&pdev->dev, "mclk");
207 if (PTR_ERR(mclk) == -EPROBE_DEFER) {
208 return -EPROBE_DEFER;
209 } else if (IS_ERR(mclk)) {
210 dev_dbg(&pdev->dev, "mclk not found.\n");
211 mclk = NULL;
212 }
213
214 drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
215 if (!drvdata)
216 return -ENOMEM;
217
218 drvdata->mclk = mclk;
219
220 ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
221
222 if (ret < 0) {
223 if (!drvdata->mclk) {
224 dev_err(&pdev->dev,
225 "No clock or clock rate defined.\n");
226 return -EINVAL;
227 }
228 drvdata->sysclk = clk_get_rate(drvdata->mclk);
229 } else if (drvdata->mclk) {
230 unsigned int requestd_rate = drvdata->sysclk;
231 clk_set_rate(drvdata->mclk, drvdata->sysclk);
232 drvdata->sysclk = clk_get_rate(drvdata->mclk);
233 if (drvdata->sysclk != requestd_rate)
234 dev_warn(&pdev->dev,
235 "Could not get requested rate %u using %u.\n",
236 requestd_rate, drvdata->sysclk);
237 }
238
239 snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
240 ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);
241
242 if (ret)
243 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
244
245 return ret;
246 }
247
248 static struct platform_driver davinci_evm_driver = {
249 .probe = davinci_evm_probe,
250 .driver = {
251 .name = "davinci_evm",
252 .pm = &snd_soc_pm_ops,
253 .of_match_table = davinci_evm_dt_ids,
254 },
255 };
256
257 module_platform_driver(davinci_evm_driver);
258
259 MODULE_AUTHOR("Vladimir Barinov");
260 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
261 MODULE_LICENSE("GPL");
262
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