xref: /linux/sound/soc/ti/omap3pandora.c (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * omap3pandora.c  --  SoC audio for Pandora Handheld Console
4  *
5  * Author: Gražvydas Ignotas <notasas@gmail.com>
6  */
7 
8 #include <linux/clk.h>
9 #include <linux/platform_device.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/delay.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/module.h>
14 
15 #include <sound/core.h>
16 #include <sound/pcm.h>
17 #include <sound/soc.h>
18 
19 #include <asm/mach-types.h>
20 #include <linux/platform_data/asoc-ti-mcbsp.h>
21 
22 #include "omap-mcbsp.h"
23 
24 #define PREFIX "ASoC omap3pandora: "
25 
26 static struct regulator *omap3pandora_dac_reg;
27 static struct gpio_desc *dac_power_gpio;
28 static struct gpio_desc *amp_power_gpio;
29 
omap3pandora_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)30 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
31 	struct snd_pcm_hw_params *params)
32 {
33 	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
34 	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
35 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
36 	int ret;
37 
38 	/* Set the codec system clock for DAC and ADC */
39 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
40 					    SND_SOC_CLOCK_IN);
41 	if (ret < 0) {
42 		pr_err(PREFIX "can't set codec system clock\n");
43 		return ret;
44 	}
45 
46 	/* Set McBSP clock to external */
47 	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
48 				     256 * params_rate(params),
49 				     SND_SOC_CLOCK_IN);
50 	if (ret < 0) {
51 		pr_err(PREFIX "can't set cpu system clock\n");
52 		return ret;
53 	}
54 
55 	ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
56 	if (ret < 0) {
57 		pr_err(PREFIX "can't set SRG clock divider\n");
58 		return ret;
59 	}
60 
61 	return 0;
62 }
63 
omap3pandora_dac_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)64 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
65 	struct snd_kcontrol *k, int event)
66 {
67 	int ret;
68 
69 	/*
70 	 * The PCM1773 DAC datasheet requires 1ms delay between switching
71 	 * VCC power on/off and /PD pin high/low
72 	 */
73 	if (SND_SOC_DAPM_EVENT_ON(event)) {
74 		ret = regulator_enable(omap3pandora_dac_reg);
75 		if (ret) {
76 			dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
77 			return ret;
78 		}
79 		mdelay(1);
80 		gpiod_set_value(dac_power_gpio, 1);
81 	} else {
82 		gpiod_set_value(dac_power_gpio, 0);
83 		mdelay(1);
84 		regulator_disable(omap3pandora_dac_reg);
85 	}
86 
87 	return 0;
88 }
89 
omap3pandora_hp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)90 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
91 	struct snd_kcontrol *k, int event)
92 {
93 	if (SND_SOC_DAPM_EVENT_ON(event))
94 		gpiod_set_value(amp_power_gpio, 1);
95 	else
96 		gpiod_set_value(amp_power_gpio, 0);
97 
98 	return 0;
99 }
100 
101 /*
102  * Audio paths on Pandora board:
103  *
104  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
105  *  |M|         A    +--------> Line Out
106  *  |A| <~~clk~~+
107  *  |P| <--- TWL4030 <--------- Line In and MICs
108  */
109 static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
110 	SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
111 			   0, 0, omap3pandora_dac_event,
112 			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
113 	SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
114 			   0, 0, NULL, 0, omap3pandora_hp_event,
115 			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
116 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
117 	SND_SOC_DAPM_LINE("Line Out", NULL),
118 
119 	SND_SOC_DAPM_MIC("Mic (internal)", NULL),
120 	SND_SOC_DAPM_MIC("Mic (external)", NULL),
121 	SND_SOC_DAPM_LINE("Line In", NULL),
122 };
123 
124 static const struct snd_soc_dapm_route omap3pandora_map[] = {
125 	{"PCM DAC", NULL, "APLL Enable"},
126 	{"Headphone Amplifier", NULL, "PCM DAC"},
127 	{"Line Out", NULL, "PCM DAC"},
128 	{"Headphone Jack", NULL, "Headphone Amplifier"},
129 
130 	{"AUXL", NULL, "Line In"},
131 	{"AUXR", NULL, "Line In"},
132 
133 	{"MAINMIC", NULL, "Mic (internal)"},
134 	{"Mic (internal)", NULL, "Mic Bias 1"},
135 
136 	{"SUBMIC", NULL, "Mic (external)"},
137 	{"Mic (external)", NULL, "Mic Bias 2"},
138 };
139 
omap3pandora_out_init(struct snd_soc_pcm_runtime * rtd)140 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
141 {
142 	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
143 
144 	/* All TWL4030 output pins are floating */
145 	snd_soc_dapm_nc_pin(dapm, "EARPIECE");
146 	snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
147 	snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
148 	snd_soc_dapm_nc_pin(dapm, "HSOL");
149 	snd_soc_dapm_nc_pin(dapm, "HSOR");
150 	snd_soc_dapm_nc_pin(dapm, "CARKITL");
151 	snd_soc_dapm_nc_pin(dapm, "CARKITR");
152 	snd_soc_dapm_nc_pin(dapm, "HFL");
153 	snd_soc_dapm_nc_pin(dapm, "HFR");
154 	snd_soc_dapm_nc_pin(dapm, "VIBRA");
155 
156 	return 0;
157 }
158 
omap3pandora_in_init(struct snd_soc_pcm_runtime * rtd)159 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
160 {
161 	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
162 
163 	/* Not comnnected */
164 	snd_soc_dapm_nc_pin(dapm, "HSMIC");
165 	snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
166 	snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
167 	snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
168 
169 	return 0;
170 }
171 
172 static const struct snd_soc_ops omap3pandora_ops = {
173 	.hw_params = omap3pandora_hw_params,
174 };
175 
176 /* Digital audio interface glue - connects codec <--> CPU */
177 SND_SOC_DAILINK_DEFS(out,
178 	DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
179 	DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
180 	DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));
181 
182 SND_SOC_DAILINK_DEFS(in,
183 	DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")),
184 	DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
185 	DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4")));
186 
187 static struct snd_soc_dai_link omap3pandora_dai[] = {
188 	{
189 		.name = "PCM1773",
190 		.stream_name = "HiFi Out",
191 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
192 			   SND_SOC_DAIFMT_CBS_CFS,
193 		.ops = &omap3pandora_ops,
194 		.init = omap3pandora_out_init,
195 		SND_SOC_DAILINK_REG(out),
196 	}, {
197 		.name = "TWL4030",
198 		.stream_name = "Line/Mic In",
199 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
200 			   SND_SOC_DAIFMT_CBS_CFS,
201 		.ops = &omap3pandora_ops,
202 		.init = omap3pandora_in_init,
203 		SND_SOC_DAILINK_REG(in),
204 	}
205 };
206 
207 /* SoC card */
208 static struct snd_soc_card snd_soc_card_omap3pandora = {
209 	.name = "omap3pandora",
210 	.owner = THIS_MODULE,
211 	.dai_link = omap3pandora_dai,
212 	.num_links = ARRAY_SIZE(omap3pandora_dai),
213 
214 	.dapm_widgets = omap3pandora_dapm_widgets,
215 	.num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
216 	.dapm_routes = omap3pandora_map,
217 	.num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
218 };
219 
220 static struct platform_device *omap3pandora_snd_device;
221 
omap3pandora_soc_init(void)222 static int __init omap3pandora_soc_init(void)
223 {
224 	int ret;
225 
226 	if (!machine_is_omap3_pandora())
227 		return -ENODEV;
228 
229 	pr_info("OMAP3 Pandora SoC init\n");
230 
231 	omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
232 	if (omap3pandora_snd_device == NULL) {
233 		pr_err(PREFIX "Platform device allocation failed\n");
234 		return -ENOMEM;
235 	}
236 
237 	platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
238 
239 	ret = platform_device_add(omap3pandora_snd_device);
240 	if (ret) {
241 		pr_err(PREFIX "Unable to add platform device\n");
242 		goto fail2;
243 	}
244 
245 	dac_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev,
246 					"dac", GPIOD_OUT_LOW);
247 	if (IS_ERR(dac_power_gpio)) {
248 		ret = PTR_ERR(dac_power_gpio);
249 		goto fail3;
250 	}
251 
252 	amp_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev,
253 					"amp", GPIOD_OUT_LOW);
254 	if (IS_ERR(amp_power_gpio)) {
255 		ret = PTR_ERR(amp_power_gpio);
256 		goto fail3;
257 	}
258 
259 	omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
260 	if (IS_ERR(omap3pandora_dac_reg)) {
261 		pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
262 			dev_name(&omap3pandora_snd_device->dev),
263 			PTR_ERR(omap3pandora_dac_reg));
264 		ret = PTR_ERR(omap3pandora_dac_reg);
265 		goto fail3;
266 	}
267 
268 	return 0;
269 
270 fail3:
271 	platform_device_del(omap3pandora_snd_device);
272 fail2:
273 	platform_device_put(omap3pandora_snd_device);
274 
275 	return ret;
276 }
277 module_init(omap3pandora_soc_init);
278 
omap3pandora_soc_exit(void)279 static void __exit omap3pandora_soc_exit(void)
280 {
281 	regulator_put(omap3pandora_dac_reg);
282 	platform_device_unregister(omap3pandora_snd_device);
283 }
284 module_exit(omap3pandora_soc_exit);
285 
286 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
287 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
288 MODULE_LICENSE("GPL");
289