1 // SPDX-License-Identifier: GPL-2.0-only
3 * omap3pandora.c -- SoC audio for Pandora Handheld Console
5 * Author: GraÅžvydas Ignotas <notasas@gmail.com>
9 #include <linux/platform_device.h>
10 #include <linux/gpio.h>
11 #include <linux/delay.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/module.h>
15 #include <sound/core.h>
16 #include <sound/pcm.h>
17 #include <sound/soc.h>
19 #include <asm/mach-types.h>
20 #include <linux/platform_data/asoc-ti-mcbsp.h>
22 #include "omap-mcbsp.h"
24 #define OMAP3_PANDORA_DAC_POWER_GPIO 118
25 #define OMAP3_PANDORA_AMP_POWER_GPIO 14
27 #define PREFIX "ASoC omap3pandora: "
29 static struct regulator *omap3pandora_dac_reg;
31 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
39 /* Set the codec system clock for DAC and ADC */
40 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
43 pr_err(PREFIX "can't set codec system clock\n");
47 /* Set McBSP clock to external */
48 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
49 256 * params_rate(params),
52 pr_err(PREFIX "can't set cpu system clock\n");
56 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
58 pr_err(PREFIX "can't set SRG clock divider\n");
65 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
66 struct snd_kcontrol *k, int event)
71 * The PCM1773 DAC datasheet requires 1ms delay between switching
72 * VCC power on/off and /PD pin high/low
74 if (SND_SOC_DAPM_EVENT_ON(event)) {
75 ret = regulator_enable(omap3pandora_dac_reg);
77 dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
81 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
83 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
85 regulator_disable(omap3pandora_dac_reg);
91 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
92 struct snd_kcontrol *k, int event)
94 if (SND_SOC_DAPM_EVENT_ON(event))
95 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
97 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
103 * Audio paths on Pandora board:
105 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
106 * |M| A +--------> Line Out
108 * |P| <--- TWL4030 <--------- Line In and MICs
110 static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
111 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
112 0, 0, omap3pandora_dac_event,
113 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
114 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
115 0, 0, NULL, 0, omap3pandora_hp_event,
116 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
117 SND_SOC_DAPM_HP("Headphone Jack", NULL),
118 SND_SOC_DAPM_LINE("Line Out", NULL),
120 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
121 SND_SOC_DAPM_MIC("Mic (external)", NULL),
122 SND_SOC_DAPM_LINE("Line In", NULL),
125 static const struct snd_soc_dapm_route omap3pandora_map[] = {
126 {"PCM DAC", NULL, "APLL Enable"},
127 {"Headphone Amplifier", NULL, "PCM DAC"},
128 {"Line Out", NULL, "PCM DAC"},
129 {"Headphone Jack", NULL, "Headphone Amplifier"},
131 {"AUXL", NULL, "Line In"},
132 {"AUXR", NULL, "Line In"},
134 {"MAINMIC", NULL, "Mic (internal)"},
135 {"Mic (internal)", NULL, "Mic Bias 1"},
137 {"SUBMIC", NULL, "Mic (external)"},
138 {"Mic (external)", NULL, "Mic Bias 2"},
141 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
143 struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
145 /* All TWL4030 output pins are floating */
146 snd_soc_dapm_nc_pin(dapm, "EARPIECE");
147 snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
148 snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
149 snd_soc_dapm_nc_pin(dapm, "HSOL");
150 snd_soc_dapm_nc_pin(dapm, "HSOR");
151 snd_soc_dapm_nc_pin(dapm, "CARKITL");
152 snd_soc_dapm_nc_pin(dapm, "CARKITR");
153 snd_soc_dapm_nc_pin(dapm, "HFL");
154 snd_soc_dapm_nc_pin(dapm, "HFR");
155 snd_soc_dapm_nc_pin(dapm, "VIBRA");
160 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
162 struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
165 snd_soc_dapm_nc_pin(dapm, "HSMIC");
166 snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
167 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
168 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
173 static const struct snd_soc_ops omap3pandora_ops = {
174 .hw_params = omap3pandora_hw_params,
177 /* Digital audio interface glue - connects codec <--> CPU */
178 SND_SOC_DAILINK_DEFS(out,
179 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
180 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
181 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));
183 SND_SOC_DAILINK_DEFS(in,
184 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")),
185 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
186 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4")));
188 static struct snd_soc_dai_link omap3pandora_dai[] = {
191 .stream_name = "HiFi Out",
192 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
193 SND_SOC_DAIFMT_CBS_CFS,
194 .ops = &omap3pandora_ops,
195 .init = omap3pandora_out_init,
196 SND_SOC_DAILINK_REG(out),
199 .stream_name = "Line/Mic In",
200 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
201 SND_SOC_DAIFMT_CBS_CFS,
202 .ops = &omap3pandora_ops,
203 .init = omap3pandora_in_init,
204 SND_SOC_DAILINK_REG(in),
209 static struct snd_soc_card snd_soc_card_omap3pandora = {
210 .name = "omap3pandora",
211 .owner = THIS_MODULE,
212 .dai_link = omap3pandora_dai,
213 .num_links = ARRAY_SIZE(omap3pandora_dai),
215 .dapm_widgets = omap3pandora_dapm_widgets,
216 .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
217 .dapm_routes = omap3pandora_map,
218 .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
221 static struct platform_device *omap3pandora_snd_device;
223 static int __init omap3pandora_soc_init(void)
227 if (!machine_is_omap3_pandora())
230 pr_info("OMAP3 Pandora SoC init\n");
232 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
234 pr_err(PREFIX "Failed to get DAC power GPIO\n");
238 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
240 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
244 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
246 pr_err(PREFIX "Failed to get amp power GPIO\n");
250 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
252 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
256 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
257 if (omap3pandora_snd_device == NULL) {
258 pr_err(PREFIX "Platform device allocation failed\n");
263 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
265 ret = platform_device_add(omap3pandora_snd_device);
267 pr_err(PREFIX "Unable to add platform device\n");
271 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
272 if (IS_ERR(omap3pandora_dac_reg)) {
273 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
274 dev_name(&omap3pandora_snd_device->dev),
275 PTR_ERR(omap3pandora_dac_reg));
276 ret = PTR_ERR(omap3pandora_dac_reg);
283 platform_device_del(omap3pandora_snd_device);
285 platform_device_put(omap3pandora_snd_device);
287 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
289 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
292 module_init(omap3pandora_soc_init);
294 static void __exit omap3pandora_soc_exit(void)
296 regulator_put(omap3pandora_dac_reg);
297 platform_device_unregister(omap3pandora_snd_device);
298 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
299 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
301 module_exit(omap3pandora_soc_exit);
303 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
304 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
305 MODULE_LICENSE("GPL");