2 * omap3pandora.c -- SoC audio for Pandora Handheld Console
4 * Author: GraÅžvydas Ignotas <notasas@gmail.com>
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.
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.
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
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>
28 #include <sound/core.h>
29 #include <sound/pcm.h>
30 #include <sound/soc.h>
32 #include <asm/mach-types.h>
33 #include <plat/mcbsp.h>
35 #include "omap-mcbsp.h"
38 #define OMAP3_PANDORA_DAC_POWER_GPIO 118
39 #define OMAP3_PANDORA_AMP_POWER_GPIO 14
41 #define PREFIX "ASoC omap3pandora: "
43 static struct regulator *omap3pandora_dac_reg;
45 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
46 struct snd_pcm_hw_params *params)
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;
53 /* Set the codec system clock for DAC and ADC */
54 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
57 pr_err(PREFIX "can't set codec system clock\n");
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),
66 pr_err(PREFIX "can't set cpu system clock\n");
70 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
72 pr_err(PREFIX "can't set SRG clock divider\n");
79 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
80 struct snd_kcontrol *k, int event)
83 * The PCM1773 DAC datasheet requires 1ms delay between switching
84 * VCC power on/off and /PD pin high/low
86 if (SND_SOC_DAPM_EVENT_ON(event)) {
87 regulator_enable(omap3pandora_dac_reg);
89 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
91 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
93 regulator_disable(omap3pandora_dac_reg);
99 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
100 struct snd_kcontrol *k, int event)
102 if (SND_SOC_DAPM_EVENT_ON(event))
103 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
105 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
111 * Audio paths on Pandora board:
113 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
114 * |M| A +--------> Line Out
116 * |P| <--- TWL4030 <--------- Line In and MICs
118 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
119 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
120 0, 0, omap3pandora_dac_event,
121 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
122 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
123 0, 0, NULL, 0, omap3pandora_hp_event,
124 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
125 SND_SOC_DAPM_HP("Headphone Jack", NULL),
126 SND_SOC_DAPM_LINE("Line Out", NULL),
129 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
130 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
131 SND_SOC_DAPM_MIC("Mic (external)", NULL),
132 SND_SOC_DAPM_LINE("Line In", NULL),
135 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
136 {"PCM DAC", NULL, "APLL Enable"},
137 {"Headphone Amplifier", NULL, "PCM DAC"},
138 {"Line Out", NULL, "PCM DAC"},
139 {"Headphone Jack", NULL, "Headphone Amplifier"},
142 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
143 {"AUXL", NULL, "Line In"},
144 {"AUXR", NULL, "Line In"},
146 {"MAINMIC", NULL, "Mic Bias 1"},
147 {"Mic Bias 1", NULL, "Mic (internal)"},
149 {"SUBMIC", NULL, "Mic Bias 2"},
150 {"Mic Bias 2", NULL, "Mic (external)"},
153 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
155 struct snd_soc_codec *codec = rtd->codec;
156 struct snd_soc_dapm_context *dapm = &codec->dapm;
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");
171 ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
172 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
176 return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
177 ARRAY_SIZE(omap3pandora_out_map));
180 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
182 struct snd_soc_codec *codec = rtd->codec;
183 struct snd_soc_dapm_context *dapm = &codec->dapm;
187 snd_soc_dapm_nc_pin(dapm, "HSMIC");
188 snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
189 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
190 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
192 ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
193 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
197 return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
198 ARRAY_SIZE(omap3pandora_in_map));
201 static struct snd_soc_ops omap3pandora_ops = {
202 .hw_params = omap3pandora_hw_params,
205 /* Digital audio interface glue - connects codec <--> CPU */
206 static struct snd_soc_dai_link omap3pandora_dai[] = {
209 .stream_name = "HiFi Out",
210 .cpu_dai_name = "omap-mcbsp-dai.1",
211 .codec_dai_name = "twl4030-hifi",
212 .platform_name = "omap-pcm-audio",
213 .codec_name = "twl4030-codec",
214 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
215 SND_SOC_DAIFMT_CBS_CFS,
216 .ops = &omap3pandora_ops,
217 .init = omap3pandora_out_init,
220 .stream_name = "Line/Mic In",
221 .cpu_dai_name = "omap-mcbsp-dai.3",
222 .codec_dai_name = "twl4030-hifi",
223 .platform_name = "omap-pcm-audio",
224 .codec_name = "twl4030-codec",
225 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
226 SND_SOC_DAIFMT_CBS_CFS,
227 .ops = &omap3pandora_ops,
228 .init = omap3pandora_in_init,
233 static struct snd_soc_card snd_soc_card_omap3pandora = {
234 .name = "omap3pandora",
235 .dai_link = omap3pandora_dai,
236 .num_links = ARRAY_SIZE(omap3pandora_dai),
239 static struct platform_device *omap3pandora_snd_device;
241 static int __init omap3pandora_soc_init(void)
245 if (!machine_is_omap3_pandora())
248 pr_info("OMAP3 Pandora SoC init\n");
250 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
252 pr_err(PREFIX "Failed to get DAC power GPIO\n");
256 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
258 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
262 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
264 pr_err(PREFIX "Failed to get amp power GPIO\n");
268 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
270 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
274 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
275 if (omap3pandora_snd_device == NULL) {
276 pr_err(PREFIX "Platform device allocation failed\n");
281 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
283 ret = platform_device_add(omap3pandora_snd_device);
285 pr_err(PREFIX "Unable to add platform device\n");
289 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
290 if (IS_ERR(omap3pandora_dac_reg)) {
291 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
292 dev_name(&omap3pandora_snd_device->dev),
293 PTR_ERR(omap3pandora_dac_reg));
294 ret = PTR_ERR(omap3pandora_dac_reg);
301 platform_device_del(omap3pandora_snd_device);
303 platform_device_put(omap3pandora_snd_device);
305 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
307 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
310 module_init(omap3pandora_soc_init);
312 static void __exit omap3pandora_soc_exit(void)
314 regulator_put(omap3pandora_dac_reg);
315 platform_device_unregister(omap3pandora_snd_device);
316 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
317 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
319 module_exit(omap3pandora_soc_exit);
321 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
322 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
323 MODULE_LICENSE("GPL");