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
24struct snd_soc_card_drvdata_davinci {
25 struct clk *mclk;
26 unsigned sysclk;
27};
28
29static 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(card: soc_card);
35
36 if (drvdata->mclk)
37 return clk_prepare_enable(clk: drvdata->mclk);
38
39 return 0;
40}
41
42static 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(card: soc_card);
48
49 clk_disable_unprepare(clk: drvdata->mclk);
50}
51
52static 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(card: soc_card))->sysclk;
62
63 /* set the codec system clock */
64 ret = snd_soc_dai_set_sysclk(dai: codec_dai, clk_id: 0, freq: 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(dai: cpu_dai, clk_id: 0, freq: sysclk, SND_SOC_CLOCK_OUT);
70 if (ret < 0 && ret != -ENOTSUPP)
71 return ret;
72
73 return 0;
74}
75
76static 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 */
83static 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 */
91static 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 */
113static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
114{
115 struct snd_soc_card *card = rtd->card;
116 struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card: rtd->card);
117 struct device_node *np = card->dev->of_node;
118 int ret;
119
120 /* Add davinci-evm specific widgets */
121 snd_soc_dapm_new_controls(dapm, widget: aic3x_dapm_widgets,
122 ARRAY_SIZE(aic3x_dapm_widgets));
123
124 if (np) {
125 ret = snd_soc_of_parse_audio_routing(card, propname: "ti,audio-routing");
126 if (ret)
127 return ret;
128 } else {
129 /* Set up davinci-evm specific audio path audio_map */
130 snd_soc_dapm_add_routes(dapm, route: audio_map,
131 ARRAY_SIZE(audio_map));
132 }
133
134 /* not connected */
135 snd_soc_dapm_disable_pin(dapm, pin: "MONO_LOUT");
136 snd_soc_dapm_disable_pin(dapm, pin: "HPLCOM");
137 snd_soc_dapm_disable_pin(dapm, pin: "HPRCOM");
138
139 return 0;
140}
141
142/*
143 * The struct is used as place holder. It will be completely
144 * filled with data from dt node.
145 */
146SND_SOC_DAILINK_DEFS(evm,
147 DAILINK_COMP_ARRAY(COMP_EMPTY()),
148 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
149 DAILINK_COMP_ARRAY(COMP_EMPTY()));
150
151static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
152 .name = "TLV320AIC3X",
153 .stream_name = "AIC3X",
154 .ops = &evm_ops,
155 .init = evm_aic3x_init,
156 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBP_CFP |
157 SND_SOC_DAIFMT_IB_NF,
158 SND_SOC_DAILINK_REG(evm),
159};
160
161static const struct of_device_id davinci_evm_dt_ids[] = {
162 {
163 .compatible = "ti,da830-evm-audio",
164 .data = (void *) &evm_dai_tlv320aic3x,
165 },
166 { /* sentinel */ }
167};
168MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
169
170/* davinci evm audio machine driver */
171static struct snd_soc_card evm_soc_card = {
172 .owner = THIS_MODULE,
173 .num_links = 1,
174};
175
176static int davinci_evm_probe(struct platform_device *pdev)
177{
178 struct device_node *np = pdev->dev.of_node;
179 struct snd_soc_dai_link *dai;
180 struct snd_soc_card_drvdata_davinci *drvdata = NULL;
181 struct clk *mclk;
182 int ret = 0;
183
184 dai = (struct snd_soc_dai_link *) device_get_match_data(dev: &pdev->dev);
185 if (!dai) {
186 dev_err(&pdev->dev, "Error: No device match found\n");
187 return -ENODEV;
188 }
189
190 evm_soc_card.dai_link = dai;
191
192 dai->codecs->of_node = of_parse_phandle(np, phandle_name: "ti,audio-codec", index: 0);
193 if (!dai->codecs->of_node)
194 return -EINVAL;
195
196 dai->cpus->of_node = of_parse_phandle(np, phandle_name: "ti,mcasp-controller", index: 0);
197 if (!dai->cpus->of_node) {
198 ret = -EINVAL;
199 goto err_put;
200 }
201
202 dai->platforms->of_node = dai->cpus->of_node;
203
204 evm_soc_card.dev = &pdev->dev;
205 ret = snd_soc_of_parse_card_name(card: &evm_soc_card, propname: "ti,model");
206 if (ret)
207 goto err_put;
208
209 mclk = devm_clk_get(dev: &pdev->dev, id: "mclk");
210 if (PTR_ERR(ptr: mclk) == -EPROBE_DEFER) {
211 ret = -EPROBE_DEFER;
212 goto err_put;
213 } else if (IS_ERR(ptr: mclk)) {
214 dev_dbg(&pdev->dev, "mclk not found.\n");
215 mclk = NULL;
216 }
217
218 drvdata = devm_kzalloc(dev: &pdev->dev, size: sizeof(*drvdata), GFP_KERNEL);
219 if (!drvdata) {
220 ret = -ENOMEM;
221 goto err_put;
222 }
223
224 drvdata->mclk = mclk;
225
226 ret = of_property_read_u32(np, propname: "ti,codec-clock-rate", out_value: &drvdata->sysclk);
227
228 if (ret < 0) {
229 if (!drvdata->mclk) {
230 dev_err(&pdev->dev,
231 "No clock or clock rate defined.\n");
232 ret = -EINVAL;
233 goto err_put;
234 }
235 drvdata->sysclk = clk_get_rate(clk: drvdata->mclk);
236 } else if (drvdata->mclk) {
237 unsigned int requestd_rate = drvdata->sysclk;
238 clk_set_rate(clk: drvdata->mclk, rate: drvdata->sysclk);
239 drvdata->sysclk = clk_get_rate(clk: drvdata->mclk);
240 if (drvdata->sysclk != requestd_rate)
241 dev_warn(&pdev->dev,
242 "Could not get requested rate %u using %u.\n",
243 requestd_rate, drvdata->sysclk);
244 }
245
246 snd_soc_card_set_drvdata(card: &evm_soc_card, data: drvdata);
247 ret = devm_snd_soc_register_card(dev: &pdev->dev, card: &evm_soc_card);
248
249 if (ret) {
250 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
251 goto err_put;
252 }
253
254 return ret;
255
256err_put:
257 dai->platforms->of_node = NULL;
258
259 if (dai->cpus->of_node) {
260 of_node_put(node: dai->cpus->of_node);
261 dai->cpus->of_node = NULL;
262 }
263
264 if (dai->codecs->of_node) {
265 of_node_put(node: dai->codecs->of_node);
266 dai->codecs->of_node = NULL;
267 }
268
269 return ret;
270}
271
272static struct platform_driver davinci_evm_driver = {
273 .probe = davinci_evm_probe,
274 .driver = {
275 .name = "davinci_evm",
276 .pm = &snd_soc_pm_ops,
277 .of_match_table = davinci_evm_dt_ids,
278 },
279};
280
281module_platform_driver(davinci_evm_driver);
282
283MODULE_AUTHOR("Vladimir Barinov");
284MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
285MODULE_LICENSE("GPL");
286

source code of linux/sound/soc/ti/davinci-evm.c