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Linux/sound/soc/ti/omap3pandora.c

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  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.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 OMAP3_PANDORA_DAC_POWER_GPIO    118
 25 #define OMAP3_PANDORA_AMP_POWER_GPIO    14
 26 
 27 #define PREFIX "ASoC omap3pandora: "
 28 
 29 static struct regulator *omap3pandora_dac_reg;
 30 
 31 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
 32         struct snd_pcm_hw_params *params)
 33 {
 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;
 37         int ret;
 38 
 39         /* Set the codec system clock for DAC and ADC */
 40         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
 41                                             SND_SOC_CLOCK_IN);
 42         if (ret < 0) {
 43                 pr_err(PREFIX "can't set codec system clock\n");
 44                 return ret;
 45         }
 46 
 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),
 50                                      SND_SOC_CLOCK_IN);
 51         if (ret < 0) {
 52                 pr_err(PREFIX "can't set cpu system clock\n");
 53                 return ret;
 54         }
 55 
 56         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
 57         if (ret < 0) {
 58                 pr_err(PREFIX "can't set SRG clock divider\n");
 59                 return ret;
 60         }
 61 
 62         return 0;
 63 }
 64 
 65 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
 66         struct snd_kcontrol *k, int event)
 67 {
 68         int ret;
 69 
 70         /*
 71          * The PCM1773 DAC datasheet requires 1ms delay between switching
 72          * VCC power on/off and /PD pin high/low
 73          */
 74         if (SND_SOC_DAPM_EVENT_ON(event)) {
 75                 ret = regulator_enable(omap3pandora_dac_reg);
 76                 if (ret) {
 77                         dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
 78                         return ret;
 79                 }
 80                 mdelay(1);
 81                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 82         } else {
 83                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 84                 mdelay(1);
 85                 regulator_disable(omap3pandora_dac_reg);
 86         }
 87 
 88         return 0;
 89 }
 90 
 91 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 92         struct snd_kcontrol *k, int event)
 93 {
 94         if (SND_SOC_DAPM_EVENT_ON(event))
 95                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 96         else
 97                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 98 
 99         return 0;
100 }
101 
102 /*
103  * Audio paths on Pandora board:
104  *
105  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
106  *  |M|         A    +--------> Line Out
107  *  |A| <~~clk~~+
108  *  |P| <--- TWL4030 <--------- Line In and MICs
109  */
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),
119 
120         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
121         SND_SOC_DAPM_MIC("Mic (external)", NULL),
122         SND_SOC_DAPM_LINE("Line In", NULL),
123 };
124 
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"},
130 
131         {"AUXL", NULL, "Line In"},
132         {"AUXR", NULL, "Line In"},
133 
134         {"MAINMIC", NULL, "Mic (internal)"},
135         {"Mic (internal)", NULL, "Mic Bias 1"},
136 
137         {"SUBMIC", NULL, "Mic (external)"},
138         {"Mic (external)", NULL, "Mic Bias 2"},
139 };
140 
141 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
142 {
143         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
144 
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");
156 
157         return 0;
158 }
159 
160 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
161 {
162         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
163 
164         /* Not comnnected */
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");
169 
170         return 0;
171 }
172 
173 static const struct snd_soc_ops omap3pandora_ops = {
174         .hw_params = omap3pandora_hw_params,
175 };
176 
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")));
182 
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")));
187 
188 static struct snd_soc_dai_link omap3pandora_dai[] = {
189         {
190                 .name = "PCM1773",
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),
197         }, {
198                 .name = "TWL4030",
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),
205         }
206 };
207 
208 /* SoC card */
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),
214 
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),
219 };
220 
221 static struct platform_device *omap3pandora_snd_device;
222 
223 static int __init omap3pandora_soc_init(void)
224 {
225         int ret;
226 
227         if (!machine_is_omap3_pandora())
228                 return -ENODEV;
229 
230         pr_info("OMAP3 Pandora SoC init\n");
231 
232         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
233         if (ret) {
234                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
235                 return ret;
236         }
237 
238         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
239         if (ret) {
240                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
241                 goto fail0;
242         }
243 
244         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
245         if (ret) {
246                 pr_err(PREFIX "Failed to get amp power GPIO\n");
247                 goto fail0;
248         }
249 
250         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
251         if (ret) {
252                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
253                 goto fail1;
254         }
255 
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");
259                 ret = -ENOMEM;
260                 goto fail1;
261         }
262 
263         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
264 
265         ret = platform_device_add(omap3pandora_snd_device);
266         if (ret) {
267                 pr_err(PREFIX "Unable to add platform device\n");
268                 goto fail2;
269         }
270 
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);
277                 goto fail3;
278         }
279 
280         return 0;
281 
282 fail3:
283         platform_device_del(omap3pandora_snd_device);
284 fail2:
285         platform_device_put(omap3pandora_snd_device);
286 fail1:
287         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
288 fail0:
289         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
290         return ret;
291 }
292 module_init(omap3pandora_soc_init);
293 
294 static void __exit omap3pandora_soc_exit(void)
295 {
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);
300 }
301 module_exit(omap3pandora_soc_exit);
302 
303 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
304 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
305 MODULE_LICENSE("GPL");
306 

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