316 lines
8.4 KiB
C
316 lines
8.4 KiB
C
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/*
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* omap3pandora.c -- SoC audio for Pandora Handheld Console
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*
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* Author: Gražvydas Ignotas <notasas@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/regulator/consumer.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/mach-types.h>
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#include <linux/platform_data/asoc-ti-mcbsp.h>
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#include "omap-mcbsp.h"
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#define OMAP3_PANDORA_DAC_POWER_GPIO 118
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#define OMAP3_PANDORA_AMP_POWER_GPIO 14
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#define PREFIX "ASoC omap3pandora: "
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static struct regulator *omap3pandora_dac_reg;
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static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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int ret;
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/* Set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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pr_err(PREFIX "can't set codec system clock\n");
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return ret;
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}
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/* Set McBSP clock to external */
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ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
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256 * params_rate(params),
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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pr_err(PREFIX "can't set cpu system clock\n");
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return ret;
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}
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ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
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if (ret < 0) {
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pr_err(PREFIX "can't set SRG clock divider\n");
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return ret;
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}
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return 0;
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}
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static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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int ret;
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/*
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* The PCM1773 DAC datasheet requires 1ms delay between switching
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* VCC power on/off and /PD pin high/low
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*/
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if (SND_SOC_DAPM_EVENT_ON(event)) {
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ret = regulator_enable(omap3pandora_dac_reg);
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if (ret) {
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dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
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return ret;
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}
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mdelay(1);
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gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
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} else {
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gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
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mdelay(1);
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regulator_disable(omap3pandora_dac_reg);
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}
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return 0;
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}
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static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *k, int event)
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{
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if (SND_SOC_DAPM_EVENT_ON(event))
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gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
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else
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gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
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return 0;
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}
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/*
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* Audio paths on Pandora board:
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*
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* |O| ---> PCM DAC +-> AMP -> Headphone Jack
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* |M| A +--------> Line Out
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* |A| <~~clk~~+
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* |P| <--- TWL4030 <--------- Line In and MICs
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*/
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static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
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SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
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0, 0, omap3pandora_dac_event,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
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SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
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0, 0, NULL, 0, omap3pandora_hp_event,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_LINE("Line Out", NULL),
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SND_SOC_DAPM_MIC("Mic (internal)", NULL),
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SND_SOC_DAPM_MIC("Mic (external)", NULL),
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SND_SOC_DAPM_LINE("Line In", NULL),
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};
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static const struct snd_soc_dapm_route omap3pandora_map[] = {
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{"PCM DAC", NULL, "APLL Enable"},
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{"Headphone Amplifier", NULL, "PCM DAC"},
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{"Line Out", NULL, "PCM DAC"},
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{"Headphone Jack", NULL, "Headphone Amplifier"},
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{"AUXL", NULL, "Line In"},
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{"AUXR", NULL, "Line In"},
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{"MAINMIC", NULL, "Mic (internal)"},
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{"Mic (internal)", NULL, "Mic Bias 1"},
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{"SUBMIC", NULL, "Mic (external)"},
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{"Mic (external)", NULL, "Mic Bias 2"},
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};
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static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
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/* All TWL4030 output pins are floating */
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snd_soc_dapm_nc_pin(dapm, "EARPIECE");
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snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
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snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
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snd_soc_dapm_nc_pin(dapm, "HSOL");
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snd_soc_dapm_nc_pin(dapm, "HSOR");
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snd_soc_dapm_nc_pin(dapm, "CARKITL");
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snd_soc_dapm_nc_pin(dapm, "CARKITR");
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snd_soc_dapm_nc_pin(dapm, "HFL");
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snd_soc_dapm_nc_pin(dapm, "HFR");
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snd_soc_dapm_nc_pin(dapm, "VIBRA");
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return 0;
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}
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static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
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/* Not comnnected */
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snd_soc_dapm_nc_pin(dapm, "HSMIC");
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snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
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snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
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snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
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return 0;
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}
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static const struct snd_soc_ops omap3pandora_ops = {
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.hw_params = omap3pandora_hw_params,
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};
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/* Digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link omap3pandora_dai[] = {
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{
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.name = "PCM1773",
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.stream_name = "HiFi Out",
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.cpu_dai_name = "omap-mcbsp.2",
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.codec_dai_name = "twl4030-hifi",
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.platform_name = "omap-mcbsp.2",
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.codec_name = "twl4030-codec",
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.ops = &omap3pandora_ops,
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.init = omap3pandora_out_init,
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}, {
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.name = "TWL4030",
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.stream_name = "Line/Mic In",
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.cpu_dai_name = "omap-mcbsp.4",
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.codec_dai_name = "twl4030-hifi",
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.platform_name = "omap-mcbsp.4",
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.codec_name = "twl4030-codec",
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.ops = &omap3pandora_ops,
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.init = omap3pandora_in_init,
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}
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};
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/* SoC card */
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static struct snd_soc_card snd_soc_card_omap3pandora = {
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.name = "omap3pandora",
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.owner = THIS_MODULE,
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.dai_link = omap3pandora_dai,
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.num_links = ARRAY_SIZE(omap3pandora_dai),
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.dapm_widgets = omap3pandora_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
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.dapm_routes = omap3pandora_map,
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.num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
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};
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static struct platform_device *omap3pandora_snd_device;
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static int __init omap3pandora_soc_init(void)
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{
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int ret;
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if (!machine_is_omap3_pandora())
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return -ENODEV;
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pr_info("OMAP3 Pandora SoC init\n");
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ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
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if (ret) {
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pr_err(PREFIX "Failed to get DAC power GPIO\n");
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return ret;
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}
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ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
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if (ret) {
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pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
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goto fail0;
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}
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ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
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if (ret) {
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pr_err(PREFIX "Failed to get amp power GPIO\n");
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goto fail0;
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}
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ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
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if (ret) {
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pr_err(PREFIX "Failed to set amp power GPIO direction\n");
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goto fail1;
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}
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omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
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if (omap3pandora_snd_device == NULL) {
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pr_err(PREFIX "Platform device allocation failed\n");
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ret = -ENOMEM;
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goto fail1;
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}
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platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
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ret = platform_device_add(omap3pandora_snd_device);
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if (ret) {
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pr_err(PREFIX "Unable to add platform device\n");
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goto fail2;
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}
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omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
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if (IS_ERR(omap3pandora_dac_reg)) {
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pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
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dev_name(&omap3pandora_snd_device->dev),
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PTR_ERR(omap3pandora_dac_reg));
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ret = PTR_ERR(omap3pandora_dac_reg);
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goto fail3;
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}
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return 0;
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fail3:
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platform_device_del(omap3pandora_snd_device);
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fail2:
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platform_device_put(omap3pandora_snd_device);
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fail1:
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gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
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fail0:
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gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
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return ret;
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}
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module_init(omap3pandora_soc_init);
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static void __exit omap3pandora_soc_exit(void)
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{
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regulator_put(omap3pandora_dac_reg);
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platform_device_unregister(omap3pandora_snd_device);
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gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
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gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
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}
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module_exit(omap3pandora_soc_exit);
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MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
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MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
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MODULE_LICENSE("GPL");
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