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>
27 #include <linux/module.h>
29 #include <sound/core.h>
30 #include <sound/pcm.h>
31 #include <sound/soc.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;
54 /* Set the codec system clock for DAC and ADC */
55 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
58 pr_err(PREFIX "can't set codec system clock\n");
62 /* Set McBSP clock to external */
63 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
64 256 * params_rate(params),
67 pr_err(PREFIX "can't set cpu system clock\n");
71 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
73 pr_err(PREFIX "can't set SRG clock divider\n");
80 static int omap3pandora_hw_free(struct snd_pcm_substream *substream)
82 struct snd_soc_pcm_runtime *rtd = substream->private_data;
83 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
86 /* Set McBSP clock back to internal for power saving to work */
87 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_FCLK,
90 pr_err(PREFIX "can't set cpu system clock\n");
97 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
98 struct snd_kcontrol *k, int event)
101 * The PCM1773 DAC datasheet requires 1ms delay between switching
102 * VCC power on/off and /PD pin high/low
104 if (SND_SOC_DAPM_EVENT_ON(event)) {
105 regulator_enable(omap3pandora_dac_reg);
107 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
109 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
111 regulator_disable(omap3pandora_dac_reg);
117 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
118 struct snd_kcontrol *k, int event)
120 if (SND_SOC_DAPM_EVENT_ON(event))
121 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
123 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
129 * Audio paths on Pandora board:
131 * |O| ---> PCM DAC +-> AMP -> Headphone Jack
132 * |M| A +--------> Line Out
134 * |P| <--- TWL4030 <--------- Line In and MICs
136 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
137 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
138 0, 0, omap3pandora_dac_event,
139 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
140 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
141 0, 0, NULL, 0, omap3pandora_hp_event,
142 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
143 SND_SOC_DAPM_HP("Headphone Jack", NULL),
144 SND_SOC_DAPM_LINE("Line Out", NULL),
147 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
148 SND_SOC_DAPM_MIC("Mic (internal)", NULL),
149 SND_SOC_DAPM_MIC("Mic (external)", NULL),
150 SND_SOC_DAPM_LINE("Line In", NULL),
153 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
154 {"PCM DAC", NULL, "APLL Enable"},
155 {"Headphone Amplifier", NULL, "PCM DAC"},
156 {"Line Out", NULL, "PCM DAC"},
157 {"Headphone Jack", NULL, "Headphone Amplifier"},
160 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
161 {"AUXL", NULL, "Line In"},
162 {"AUXR", NULL, "Line In"},
164 {"MAINMIC", NULL, "Mic Bias 1"},
165 {"Mic Bias 1", NULL, "Mic (internal)"},
167 {"SUBMIC", NULL, "Mic Bias 2"},
168 {"Mic Bias 2", NULL, "Mic (external)"},
171 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
173 struct snd_soc_codec *codec = rtd->codec;
174 struct snd_soc_dapm_context *dapm = &codec->dapm;
177 /* All TWL4030 output pins are floating */
178 snd_soc_dapm_nc_pin(dapm, "EARPIECE");
179 snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
180 snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
181 snd_soc_dapm_nc_pin(dapm, "HSOL");
182 snd_soc_dapm_nc_pin(dapm, "HSOR");
183 snd_soc_dapm_nc_pin(dapm, "CARKITL");
184 snd_soc_dapm_nc_pin(dapm, "CARKITR");
185 snd_soc_dapm_nc_pin(dapm, "HFL");
186 snd_soc_dapm_nc_pin(dapm, "HFR");
187 snd_soc_dapm_nc_pin(dapm, "VIBRA");
189 ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
190 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
194 return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
195 ARRAY_SIZE(omap3pandora_out_map));
198 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
200 struct snd_soc_codec *codec = rtd->codec;
201 struct snd_soc_dapm_context *dapm = &codec->dapm;
205 snd_soc_dapm_nc_pin(dapm, "HSMIC");
206 snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
207 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
208 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
210 ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
211 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
215 return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
216 ARRAY_SIZE(omap3pandora_in_map));
219 static struct snd_soc_ops omap3pandora_ops = {
220 .hw_params = omap3pandora_hw_params,
221 .hw_free = omap3pandora_hw_free,
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 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
234 SND_SOC_DAIFMT_CBS_CFS,
235 .ops = &omap3pandora_ops,
236 .init = omap3pandora_out_init,
239 .stream_name = "Line/Mic In",
240 .cpu_dai_name = "omap-mcbsp-dai.3",
241 .codec_dai_name = "twl4030-hifi",
242 .platform_name = "omap-pcm-audio",
243 .codec_name = "twl4030-codec",
244 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
245 SND_SOC_DAIFMT_CBS_CFS,
246 .ops = &omap3pandora_ops,
247 .init = omap3pandora_in_init,
252 static struct snd_soc_card snd_soc_card_omap3pandora = {
253 .name = "omap3pandora",
254 .dai_link = omap3pandora_dai,
255 .num_links = ARRAY_SIZE(omap3pandora_dai),
258 static struct platform_device *omap3pandora_snd_device;
260 static int __init omap3pandora_soc_init(void)
264 if (!machine_is_omap3_pandora())
267 pr_info("OMAP3 Pandora SoC init\n");
269 ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
271 pr_err(PREFIX "Failed to get DAC power GPIO\n");
275 ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
277 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
281 ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
283 pr_err(PREFIX "Failed to get amp power GPIO\n");
287 ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
289 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
293 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
294 if (omap3pandora_snd_device == NULL) {
295 pr_err(PREFIX "Platform device allocation failed\n");
300 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
302 ret = platform_device_add(omap3pandora_snd_device);
304 pr_err(PREFIX "Unable to add platform device\n");
308 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
309 if (IS_ERR(omap3pandora_dac_reg)) {
310 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
311 dev_name(&omap3pandora_snd_device->dev),
312 PTR_ERR(omap3pandora_dac_reg));
313 ret = PTR_ERR(omap3pandora_dac_reg);
320 platform_device_del(omap3pandora_snd_device);
322 platform_device_put(omap3pandora_snd_device);
324 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
326 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
329 module_init(omap3pandora_soc_init);
331 static void __exit omap3pandora_soc_exit(void)
333 regulator_put(omap3pandora_dac_reg);
334 platform_device_unregister(omap3pandora_snd_device);
335 gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
336 gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
338 module_exit(omap3pandora_soc_exit);
340 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
341 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
342 MODULE_LICENSE("GPL");