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 = asoc_substream_to_rtd(substream);
34 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
35 struct snd_soc_dai *cpu_dai = asoc_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