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Linux/sound/soc/omap/omap3pandora.c

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  1 /*
  2  * omap3pandora.c  --  SoC audio for Pandora Handheld Console
  3  *
  4  * Author: GraÅžvydas Ignotas <notasas@gmail.com>
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License
  8  * version 2 as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful, but
 11  * WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 13  * General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, write to the Free Software
 17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 18  * 02110-1301 USA
 19  *
 20  */
 21 
 22 #include <linux/clk.h>
 23 #include <linux/platform_device.h>
 24 #include <linux/gpio.h>
 25 #include <linux/delay.h>
 26 #include <linux/regulator/consumer.h>
 27 #include <linux/module.h>
 28 
 29 #include <sound/core.h>
 30 #include <sound/pcm.h>
 31 #include <sound/soc.h>
 32 
 33 #include <asm/mach-types.h>
 34 #include <linux/platform_data/asoc-ti-mcbsp.h>
 35 
 36 #include "omap-mcbsp.h"
 37 
 38 #define OMAP3_PANDORA_DAC_POWER_GPIO    118
 39 #define OMAP3_PANDORA_AMP_POWER_GPIO    14
 40 
 41 #define PREFIX "ASoC omap3pandora: "
 42 
 43 static struct regulator *omap3pandora_dac_reg;
 44 
 45 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
 46         struct snd_pcm_hw_params *params)
 47 {
 48         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 49         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 50         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 51         int ret;
 52 
 53         /* Set the codec system clock for DAC and ADC */
 54         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
 55                                             SND_SOC_CLOCK_IN);
 56         if (ret < 0) {
 57                 pr_err(PREFIX "can't set codec system clock\n");
 58                 return ret;
 59         }
 60 
 61         /* Set McBSP clock to external */
 62         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
 63                                      256 * params_rate(params),
 64                                      SND_SOC_CLOCK_IN);
 65         if (ret < 0) {
 66                 pr_err(PREFIX "can't set cpu system clock\n");
 67                 return ret;
 68         }
 69 
 70         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
 71         if (ret < 0) {
 72                 pr_err(PREFIX "can't set SRG clock divider\n");
 73                 return ret;
 74         }
 75 
 76         return 0;
 77 }
 78 
 79 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
 80         struct snd_kcontrol *k, int event)
 81 {
 82         int ret;
 83 
 84         /*
 85          * The PCM1773 DAC datasheet requires 1ms delay between switching
 86          * VCC power on/off and /PD pin high/low
 87          */
 88         if (SND_SOC_DAPM_EVENT_ON(event)) {
 89                 ret = regulator_enable(omap3pandora_dac_reg);
 90                 if (ret) {
 91                         dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
 92                         return ret;
 93                 }
 94                 mdelay(1);
 95                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 96         } else {
 97                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 98                 mdelay(1);
 99                 regulator_disable(omap3pandora_dac_reg);
100         }
101 
102         return 0;
103 }
104 
105 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
106         struct snd_kcontrol *k, int event)
107 {
108         if (SND_SOC_DAPM_EVENT_ON(event))
109                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
110         else
111                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
112 
113         return 0;
114 }
115 
116 /*
117  * Audio paths on Pandora board:
118  *
119  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
120  *  |M|         A    +--------> Line Out
121  *  |A| <~~clk~~+
122  *  |P| <--- TWL4030 <--------- Line In and MICs
123  */
124 static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
125         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
126                            0, 0, omap3pandora_dac_event,
127                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
128         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
129                            0, 0, NULL, 0, omap3pandora_hp_event,
130                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
131         SND_SOC_DAPM_HP("Headphone Jack", NULL),
132         SND_SOC_DAPM_LINE("Line Out", NULL),
133 
134         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
135         SND_SOC_DAPM_MIC("Mic (external)", NULL),
136         SND_SOC_DAPM_LINE("Line In", NULL),
137 };
138 
139 static const struct snd_soc_dapm_route omap3pandora_map[] = {
140         {"PCM DAC", NULL, "APLL Enable"},
141         {"Headphone Amplifier", NULL, "PCM DAC"},
142         {"Line Out", NULL, "PCM DAC"},
143         {"Headphone Jack", NULL, "Headphone Amplifier"},
144 
145         {"AUXL", NULL, "Line In"},
146         {"AUXR", NULL, "Line In"},
147 
148         {"MAINMIC", NULL, "Mic (internal)"},
149         {"Mic (internal)", NULL, "Mic Bias 1"},
150 
151         {"SUBMIC", NULL, "Mic (external)"},
152         {"Mic (external)", NULL, "Mic Bias 2"},
153 };
154 
155 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
156 {
157         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
158 
159         /* All TWL4030 output pins are floating */
160         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
161         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
162         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
163         snd_soc_dapm_nc_pin(dapm, "HSOL");
164         snd_soc_dapm_nc_pin(dapm, "HSOR");
165         snd_soc_dapm_nc_pin(dapm, "CARKITL");
166         snd_soc_dapm_nc_pin(dapm, "CARKITR");
167         snd_soc_dapm_nc_pin(dapm, "HFL");
168         snd_soc_dapm_nc_pin(dapm, "HFR");
169         snd_soc_dapm_nc_pin(dapm, "VIBRA");
170 
171         return 0;
172 }
173 
174 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
175 {
176         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
177 
178         /* Not comnnected */
179         snd_soc_dapm_nc_pin(dapm, "HSMIC");
180         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
181         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
182         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
183 
184         return 0;
185 }
186 
187 static struct snd_soc_ops omap3pandora_ops = {
188         .hw_params = omap3pandora_hw_params,
189 };
190 
191 /* Digital audio interface glue - connects codec <--> CPU */
192 static struct snd_soc_dai_link omap3pandora_dai[] = {
193         {
194                 .name = "PCM1773",
195                 .stream_name = "HiFi Out",
196                 .cpu_dai_name = "omap-mcbsp.2",
197                 .codec_dai_name = "twl4030-hifi",
198                 .platform_name = "omap-mcbsp.2",
199                 .codec_name = "twl4030-codec",
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_out_init,
204         }, {
205                 .name = "TWL4030",
206                 .stream_name = "Line/Mic In",
207                 .cpu_dai_name = "omap-mcbsp.4",
208                 .codec_dai_name = "twl4030-hifi",
209                 .platform_name = "omap-mcbsp.4",
210                 .codec_name = "twl4030-codec",
211                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
212                            SND_SOC_DAIFMT_CBS_CFS,
213                 .ops = &omap3pandora_ops,
214                 .init = omap3pandora_in_init,
215         }
216 };
217 
218 /* SoC card */
219 static struct snd_soc_card snd_soc_card_omap3pandora = {
220         .name = "omap3pandora",
221         .owner = THIS_MODULE,
222         .dai_link = omap3pandora_dai,
223         .num_links = ARRAY_SIZE(omap3pandora_dai),
224 
225         .dapm_widgets = omap3pandora_dapm_widgets,
226         .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
227         .dapm_routes = omap3pandora_map,
228         .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
229 };
230 
231 static struct platform_device *omap3pandora_snd_device;
232 
233 static int __init omap3pandora_soc_init(void)
234 {
235         int ret;
236 
237         if (!machine_is_omap3_pandora())
238                 return -ENODEV;
239 
240         pr_info("OMAP3 Pandora SoC init\n");
241 
242         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
243         if (ret) {
244                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
245                 return ret;
246         }
247 
248         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
249         if (ret) {
250                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
251                 goto fail0;
252         }
253 
254         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
255         if (ret) {
256                 pr_err(PREFIX "Failed to get amp power GPIO\n");
257                 goto fail0;
258         }
259 
260         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
261         if (ret) {
262                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
263                 goto fail1;
264         }
265 
266         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
267         if (omap3pandora_snd_device == NULL) {
268                 pr_err(PREFIX "Platform device allocation failed\n");
269                 ret = -ENOMEM;
270                 goto fail1;
271         }
272 
273         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
274 
275         ret = platform_device_add(omap3pandora_snd_device);
276         if (ret) {
277                 pr_err(PREFIX "Unable to add platform device\n");
278                 goto fail2;
279         }
280 
281         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
282         if (IS_ERR(omap3pandora_dac_reg)) {
283                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
284                         dev_name(&omap3pandora_snd_device->dev),
285                         PTR_ERR(omap3pandora_dac_reg));
286                 ret = PTR_ERR(omap3pandora_dac_reg);
287                 goto fail3;
288         }
289 
290         return 0;
291 
292 fail3:
293         platform_device_del(omap3pandora_snd_device);
294 fail2:
295         platform_device_put(omap3pandora_snd_device);
296 fail1:
297         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
298 fail0:
299         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
300         return ret;
301 }
302 module_init(omap3pandora_soc_init);
303 
304 static void __exit omap3pandora_soc_exit(void)
305 {
306         regulator_put(omap3pandora_dac_reg);
307         platform_device_unregister(omap3pandora_snd_device);
308         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
309         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
310 }
311 module_exit(omap3pandora_soc_exit);
312 
313 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
314 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
315 MODULE_LICENSE("GPL");
316 

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