1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * omap3pandora.c -- SoC audio for Pandora Handheld Console
4 *
5 * Author: GraÅžvydas 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
26static struct regulator *omap3pandora_dac_reg;
27static struct gpio_desc *dac_power_gpio;
28static struct gpio_desc *amp_power_gpio;
29
30static 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(dai: codec_dai, clk_id: 0, freq: 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(dai: cpu_dai, clk_id: OMAP_MCBSP_SYSCLK_CLKS_EXT,
48 freq: 256 * params_rate(p: 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(dai: cpu_dai, div_id: OMAP_MCBSP_CLKGDV, div: 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
64static 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 struct device *dev = snd_soc_dapm_to_dev(dapm: w->dapm);
75
76 ret = regulator_enable(regulator: omap3pandora_dac_reg);
77 if (ret) {
78 dev_err(dev, "Failed to power DAC: %d\n", ret);
79 return ret;
80 }
81 mdelay(1);
82 gpiod_set_value(desc: dac_power_gpio, value: 1);
83 } else {
84 gpiod_set_value(desc: dac_power_gpio, value: 0);
85 mdelay(1);
86 regulator_disable(regulator: omap3pandora_dac_reg);
87 }
88
89 return 0;
90}
91
92static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
93 struct snd_kcontrol *k, int event)
94{
95 if (SND_SOC_DAPM_EVENT_ON(event))
96 gpiod_set_value(desc: amp_power_gpio, value: 1);
97 else
98 gpiod_set_value(desc: amp_power_gpio, value: 0);
99
100 return 0;
101}
102
103/*
104 * Audio paths on Pandora board:
105 *
106 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
107 * |M| A +--------> Line Out
108 * |A| <~~clk~~+
109 * |P| <--- TWL4030 <--------- Line In and MICs
110 */
111static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
112 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
113 0, 0, omap3pandora_dac_event,
114 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
115 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
116 0, 0, NULL, 0, omap3pandora_hp_event,
117 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
118 SND_SOC_DAPM_HP("Headphone Jack", NULL),
119 SND_SOC_DAPM_LINE("Line Out", NULL),
120
121 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
122 SND_SOC_DAPM_MIC("Mic (external)", NULL),
123 SND_SOC_DAPM_LINE("Line In", NULL),
124};
125
126static const struct snd_soc_dapm_route omap3pandora_map[] = {
127 {"PCM DAC", NULL, "APLL Enable"},
128 {"Headphone Amplifier", NULL, "PCM DAC"},
129 {"Line Out", NULL, "PCM DAC"},
130 {"Headphone Jack", NULL, "Headphone Amplifier"},
131
132 {"AUXL", NULL, "Line In"},
133 {"AUXR", NULL, "Line In"},
134
135 {"MAINMIC", NULL, "Mic (internal)"},
136 {"Mic (internal)", NULL, "Mic Bias 1"},
137
138 {"SUBMIC", NULL, "Mic (external)"},
139 {"Mic (external)", NULL, "Mic Bias 2"},
140};
141
142static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
143{
144 struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card: rtd->card);
145
146 /* All TWL4030 output pins are floating */
147 snd_soc_dapm_disable_pin(dapm, pin: "EARPIECE");
148 snd_soc_dapm_disable_pin(dapm, pin: "PREDRIVEL");
149 snd_soc_dapm_disable_pin(dapm, pin: "PREDRIVER");
150 snd_soc_dapm_disable_pin(dapm, pin: "HSOL");
151 snd_soc_dapm_disable_pin(dapm, pin: "HSOR");
152 snd_soc_dapm_disable_pin(dapm, pin: "CARKITL");
153 snd_soc_dapm_disable_pin(dapm, pin: "CARKITR");
154 snd_soc_dapm_disable_pin(dapm, pin: "HFL");
155 snd_soc_dapm_disable_pin(dapm, pin: "HFR");
156 snd_soc_dapm_disable_pin(dapm, pin: "VIBRA");
157
158 return 0;
159}
160
161static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
162{
163 struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card: rtd->card);
164
165 /* Not comnnected */
166 snd_soc_dapm_disable_pin(dapm, pin: "HSMIC");
167 snd_soc_dapm_disable_pin(dapm, pin: "CARKITMIC");
168 snd_soc_dapm_disable_pin(dapm, pin: "DIGIMIC0");
169 snd_soc_dapm_disable_pin(dapm, pin: "DIGIMIC1");
170
171 return 0;
172}
173
174static const struct snd_soc_ops omap3pandora_ops = {
175 .hw_params = omap3pandora_hw_params,
176};
177
178/* Digital audio interface glue - connects codec <--> CPU */
179SND_SOC_DAILINK_DEFS(out,
180 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
181 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
182 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));
183
184SND_SOC_DAILINK_DEFS(in,
185 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")),
186 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
187 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4")));
188
189static struct snd_soc_dai_link omap3pandora_dai[] = {
190 {
191 .name = "PCM1773",
192 .stream_name = "HiFi Out",
193 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
194 SND_SOC_DAIFMT_CBC_CFC,
195 .ops = &omap3pandora_ops,
196 .init = omap3pandora_out_init,
197 SND_SOC_DAILINK_REG(out),
198 }, {
199 .name = "TWL4030",
200 .stream_name = "Line/Mic In",
201 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
202 SND_SOC_DAIFMT_CBC_CFC,
203 .ops = &omap3pandora_ops,
204 .init = omap3pandora_in_init,
205 SND_SOC_DAILINK_REG(in),
206 }
207};
208
209/* SoC card */
210static struct snd_soc_card snd_soc_card_omap3pandora = {
211 .name = "omap3pandora",
212 .owner = THIS_MODULE,
213 .dai_link = omap3pandora_dai,
214 .num_links = ARRAY_SIZE(omap3pandora_dai),
215
216 .dapm_widgets = omap3pandora_dapm_widgets,
217 .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
218 .dapm_routes = omap3pandora_map,
219 .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
220};
221
222static struct platform_device *omap3pandora_snd_device;
223
224static int __init omap3pandora_soc_init(void)
225{
226 int ret;
227
228 if (!machine_is_omap3_pandora())
229 return -ENODEV;
230
231 pr_info("OMAP3 Pandora SoC init\n");
232
233 omap3pandora_snd_device = platform_device_alloc(name: "soc-audio", id: -1);
234 if (omap3pandora_snd_device == NULL) {
235 pr_err(PREFIX "Platform device allocation failed\n");
236 return -ENOMEM;
237 }
238
239 platform_set_drvdata(pdev: omap3pandora_snd_device, data: &snd_soc_card_omap3pandora);
240
241 ret = platform_device_add(pdev: omap3pandora_snd_device);
242 if (ret) {
243 pr_err(PREFIX "Unable to add platform device\n");
244 goto fail2;
245 }
246
247 dac_power_gpio = devm_gpiod_get(dev: &omap3pandora_snd_device->dev,
248 con_id: "dac", flags: GPIOD_OUT_LOW);
249 if (IS_ERR(ptr: dac_power_gpio)) {
250 ret = PTR_ERR(ptr: dac_power_gpio);
251 goto fail3;
252 }
253
254 amp_power_gpio = devm_gpiod_get(dev: &omap3pandora_snd_device->dev,
255 con_id: "amp", flags: GPIOD_OUT_LOW);
256 if (IS_ERR(ptr: amp_power_gpio)) {
257 ret = PTR_ERR(ptr: amp_power_gpio);
258 goto fail3;
259 }
260
261 omap3pandora_dac_reg = regulator_get(dev: &omap3pandora_snd_device->dev, id: "vcc");
262 if (IS_ERR(ptr: omap3pandora_dac_reg)) {
263 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
264 dev_name(&omap3pandora_snd_device->dev),
265 PTR_ERR(omap3pandora_dac_reg));
266 ret = PTR_ERR(ptr: omap3pandora_dac_reg);
267 goto fail3;
268 }
269
270 return 0;
271
272fail3:
273 platform_device_del(pdev: omap3pandora_snd_device);
274fail2:
275 platform_device_put(pdev: omap3pandora_snd_device);
276
277 return ret;
278}
279module_init(omap3pandora_soc_init);
280
281static void __exit omap3pandora_soc_exit(void)
282{
283 regulator_put(regulator: omap3pandora_dac_reg);
284 platform_device_unregister(omap3pandora_snd_device);
285}
286module_exit(omap3pandora_soc_exit);
287
288MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
289MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
290MODULE_LICENSE("GPL");
291

source code of linux/sound/soc/ti/omap3pandora.c