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>
31 #include <sound/soc-dapm.h>
33 #include <asm/mach-types.h>
34 #include <plat/mcbsp.h>
36 #include "omap-mcbsp.h"
39 #define OMAP3_PANDORA_DAC_POWER_GPIO 118
40 #define OMAP3_PANDORA_AMP_POWER_GPIO 14
42 #define PREFIX "ASoC omap3pandora: "
44 static struct regulator *omap3pandora_dac_reg;
46 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
47 struct snd_pcm_hw_params *params)
49 struct snd_soc_pcm_runtime *rtd = substream->private_data;
50 struct snd_soc_dai *codec_dai = rtd->codec_dai;
51 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
52 int fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
53 SND_SOC_DAIFMT_CBS_CFS;
56 /* Set codec DAI configuration */
57 ret = snd_soc_dai_set_fmt(codec_dai, fmt);
59 pr_err(PREFIX "can't set codec DAI configuration\n");
63 /* Set cpu DAI configuration */
64 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
66 pr_err(PREFIX "can't set cpu DAI configuration\n");
70 /* Set the codec system clock for DAC and ADC */
71 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
74 pr_err(PREFIX "can't set codec system clock\n");
78 /* Set McBSP clock to external */
79 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
80 256 * params_rate(params),
83 pr_err(PREFIX "can't set cpu system clock\n");
87 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
89 pr_err(PREFIX "can't set SRG clock divider\n");
96 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
97 struct snd_kcontrol *k, int event)
100 * The PCM1773 DAC datasheet requires 1ms delay between switching
101 * VCC power on/off and /PD pin high/low
103 if (SND_SOC_DAPM_EVENT_ON(event)) {
104 regulator_enable(omap3pandora_dac_reg);
106 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
108 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
110 regulator_disable(omap3pandora_dac_reg);
116 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
117 struct snd_kcontrol *k, int event)
119 if (SND_SOC_DAPM_EVENT_ON(event))
120 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
122 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
128 * Audio paths on Pandora board:
130 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
131 * |M| A +--------> Line Out
133 * |P| <--- TWL4030 <--------- Line In and MICs
135 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
136 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
137 0, 0, omap3pandora_dac_event,
138 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
139 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
140 0, 0, NULL, 0, omap3pandora_hp_event,
141 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
142 SND_SOC_DAPM_HP("Headphone Jack", NULL),
143 SND_SOC_DAPM_LINE("Line Out", NULL),
146 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
147 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
148 SND_SOC_DAPM_MIC("Mic (external)", NULL),
149 SND_SOC_DAPM_LINE("Line In", NULL),
152 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
153 {"PCM DAC", NULL, "APLL Enable"},
154 {"Headphone Amplifier", NULL, "PCM DAC"},
155 {"Line Out", NULL, "PCM DAC"},
156 {"Headphone Jack", NULL, "Headphone Amplifier"},
159 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
160 {"AUXL", NULL, "Line In"},
161 {"AUXR", NULL, "Line In"},
163 {"MAINMIC", NULL, "Mic Bias 1"},
164 {"Mic Bias 1", NULL, "Mic (internal)"},
166 {"SUBMIC", NULL, "Mic Bias 2"},
167 {"Mic Bias 2", NULL, "Mic (external)"},
170 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
172 struct snd_soc_codec *codec = rtd->codec;
175 /* All TWL4030 output pins are floating */
176 snd_soc_dapm_nc_pin(codec, "EARPIECE");
177 snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
178 snd_soc_dapm_nc_pin(codec, "PREDRIVER");
179 snd_soc_dapm_nc_pin(codec, "HSOL");
180 snd_soc_dapm_nc_pin(codec, "HSOR");
181 snd_soc_dapm_nc_pin(codec, "CARKITL");
182 snd_soc_dapm_nc_pin(codec, "CARKITR");
183 snd_soc_dapm_nc_pin(codec, "HFL");
184 snd_soc_dapm_nc_pin(codec, "HFR");
185 snd_soc_dapm_nc_pin(codec, "VIBRA");
187 ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
188 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
192 snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
193 ARRAY_SIZE(omap3pandora_out_map));
195 return snd_soc_dapm_sync(codec);
198 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
200 struct snd_soc_codec *codec = rtd->codec;
204 snd_soc_dapm_nc_pin(codec, "HSMIC");
205 snd_soc_dapm_nc_pin(codec, "CARKITMIC");
206 snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
207 snd_soc_dapm_nc_pin(codec, "DIGIMIC1");
209 ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
210 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
214 snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
215 ARRAY_SIZE(omap3pandora_in_map));
217 return snd_soc_dapm_sync(codec);
220 static struct snd_soc_ops omap3pandora_ops = {
221 .hw_params = omap3pandora_hw_params,
224 /* Digital audio interface glue - connects codec <--> CPU */
225 static struct snd_soc_dai_link omap3pandora_dai[] = {
228 .stream_name = "HiFi Out",
229 .cpu_dai_name = "omap-mcbsp-dai.1",
230 .codec_dai_name = "twl4030-hifi",
231 .platform_name = "omap-pcm-audio",
232 .codec_name = "twl4030-codec",
233 .ops = &omap3pandora_ops,
234 .init = omap3pandora_out_init,
237 .stream_name = "Line/Mic In",
238 .cpu_dai_name = "omap-mcbsp-dai.3",
239 .codec_dai_name = "twl4030-hifi",
240 .platform_name = "omap-pcm-audio",
241 .codec_name = "twl4030-codec",
242 .ops = &omap3pandora_ops,
243 .init = omap3pandora_in_init,
248 static struct snd_soc_card snd_soc_card_omap3pandora = {
249 .name = "omap3pandora",
250 .dai_link = omap3pandora_dai,
251 .num_links = ARRAY_SIZE(omap3pandora_dai),
254 static struct platform_device *omap3pandora_snd_device;
256 static int __init omap3pandora_soc_init(void)
260 if (!machine_is_omap3_pandora())
263 pr_info("OMAP3 Pandora SoC init\n");
265 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
267 pr_err(PREFIX "Failed to get DAC power GPIO\n");
271 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
273 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
277 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
279 pr_err(PREFIX "Failed to get amp power GPIO\n");
283 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
285 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
289 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
290 if (omap3pandora_snd_device == NULL) {
291 pr_err(PREFIX "Platform device allocation failed\n");
296 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
298 ret = platform_device_add(omap3pandora_snd_device);
300 pr_err(PREFIX "Unable to add platform device\n");
304 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
305 if (IS_ERR(omap3pandora_dac_reg)) {
306 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
307 dev_name(&omap3pandora_snd_device->dev),
308 PTR_ERR(omap3pandora_dac_reg));
315 platform_device_del(omap3pandora_snd_device);
317 platform_device_put(omap3pandora_snd_device);
319 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
321 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
324 module_init(omap3pandora_soc_init);
326 static void __exit omap3pandora_soc_exit(void)
328 regulator_put(omap3pandora_dac_reg);
329 platform_device_unregister(omap3pandora_snd_device);
330 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
331 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
333 module_exit(omap3pandora_soc_exit);
335 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
336 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
337 MODULE_LICENSE("GPL");