ASoC: Add support for OMAP3 Pandora (68fb7407) · Commits · github.com / kvm-riscv / linux

sound/soc/omap/Kconfig

+8 −0

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		@@ -46,3 +46,11 @@ config SND_OMAP_SOC_SDP3430
		help
		Say Y if you want to add support for SoC audio on Texas Instruments
		SDP3430.

		config SND_OMAP_SOC_OMAP3_PANDORA
		tristate "SoC Audio support for OMAP3 Pandora"
		depends on TWL4030_CORE && SND_OMAP_SOC && MACH_OMAP3_PANDORA
		select SND_OMAP_SOC_MCBSP
		select SND_SOC_TWL4030
		help
		Say Y if you want to add support for SoC audio on the OMAP3 Pandora.

sound/soc/omap/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -11,9 +11,11 @@ snd-soc-osk5912-objs := osk5912.o
		snd-soc-overo-objs := overo.o
		snd-soc-omap2evm-objs := omap2evm.o
		snd-soc-sdp3430-objs := sdp3430.o
		snd-soc-omap3pandora-objs := omap3pandora.o

		obj-$(CONFIG_SND_OMAP_SOC_N810) += snd-soc-n810.o
		obj-$(CONFIG_SND_OMAP_SOC_OSK5912) += snd-soc-osk5912.o
		obj-$(CONFIG_SND_OMAP_SOC_OVERO) += snd-soc-overo.o
		obj-$(CONFIG_MACH_OMAP2EVM) += snd-soc-omap2evm.o
		obj-$(CONFIG_SND_OMAP_SOC_SDP3430) += snd-soc-sdp3430.o
		obj-$(CONFIG_SND_OMAP_SOC_OMAP3_PANDORA) += snd-soc-omap3pandora.o

sound/soc/omap/omap3pandora.c

0 → 100644

+311 −0

Original line number	Diff line number	Diff line
		/*
		* omap3pandora.c -- SoC audio for Pandora Handheld Console
		*
		* Author: Gražvydas Ignotas <notasas@gmail.com>
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License
		* version 2 as published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful, but
		* WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		* General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
		* 02110-1301 USA
		*
		*/

		#include <linux/clk.h>
		#include <linux/platform_device.h>
		#include <linux/gpio.h>
		#include <linux/delay.h>

		#include <sound/core.h>
		#include <sound/pcm.h>
		#include <sound/soc.h>
		#include <sound/soc-dapm.h>

		#include <asm/mach-types.h>

		#include "omap-mcbsp.h"
		#include "omap-pcm.h"
		#include "../codecs/twl4030.h"

		#define OMAP3_PANDORA_DAC_POWER_GPIO 118
		#define OMAP3_PANDORA_AMP_POWER_GPIO 14

		#define PREFIX "ASoC omap3pandora: "

		static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
		struct snd_soc_dai *cpu_dai, unsigned int fmt)
		{
		int ret;

		/* Set codec DAI configuration */
		ret = snd_soc_dai_set_fmt(codec_dai, fmt);
		if (ret < 0) {
		pr_err(PREFIX "can't set codec DAI configuration\n");
		return ret;
		}

		/* Set cpu DAI configuration */
		ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
		if (ret < 0) {
		pr_err(PREFIX "can't set cpu DAI configuration\n");
		return ret;
		}

		/* Set the codec system clock for DAC and ADC */
		ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
		SND_SOC_CLOCK_IN);
		if (ret < 0) {
		pr_err(PREFIX "can't set codec system clock\n");
		return ret;
		}

		/* Set McBSP clock to external */
		ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
		SND_SOC_CLOCK_IN);
		if (ret < 0) {
		pr_err(PREFIX "can't set cpu system clock\n");
		return ret;
		}

		ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
		if (ret < 0) {
		pr_err(PREFIX "can't set SRG clock divider\n");
		return ret;
		}

		return 0;
		}

		static int omap3pandora_out_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
		struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

		return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
		SND_SOC_DAIFMT_I2S \|
		SND_SOC_DAIFMT_IB_NF \|
		SND_SOC_DAIFMT_CBS_CFS);
		}

		static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
		{
		struct snd_soc_pcm_runtime *rtd = substream->private_data;
		struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
		struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

		return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
		SND_SOC_DAIFMT_I2S \|
		SND_SOC_DAIFMT_NB_NF \|
		SND_SOC_DAIFMT_CBS_CFS);
		}

		static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *k, int event)
		{
		if (SND_SOC_DAPM_EVENT_ON(event)) {
		gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
		gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
		} else {
		gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
		mdelay(1);
		gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
		}

		return 0;
		}

		/*
		* Audio paths on Pandora board:
		*
		* \|O\| ---> PCM DAC +-> AMP -> Headphone Jack
		* \|M\| A +--------> Line Out
		* \|A\| <~~clk~~+
		* \|P\| <--- TWL4030 <--------- Line In and MICs
		*/
		static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
		SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
		SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
		0, 0, NULL, 0, omap3pandora_hp_event,
		SND_SOC_DAPM_POST_PMU \| SND_SOC_DAPM_PRE_PMD),
		SND_SOC_DAPM_HP("Headphone Jack", NULL),
		SND_SOC_DAPM_LINE("Line Out", NULL),
		};

		static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
		SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
		SND_SOC_DAPM_MIC("Mic (external)", NULL),
		SND_SOC_DAPM_LINE("Line In", NULL),
		};

		static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
		{"Headphone Amplifier", NULL, "PCM DAC"},
		{"Line Out", NULL, "PCM DAC"},
		{"Headphone Jack", NULL, "Headphone Amplifier"},
		};

		static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
		{"INL", NULL, "Line In"},
		{"INR", NULL, "Line In"},
		{"INL", NULL, "Mic (Internal)"},
		{"INR", NULL, "Mic (external)"},
		};

		static int omap3pandora_out_init(struct snd_soc_codec *codec)
		{
		int ret;

		ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
		ARRAY_SIZE(omap3pandora_out_dapm_widgets));
		if (ret < 0)
		return ret;

		snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
		ARRAY_SIZE(omap3pandora_out_map));

		return snd_soc_dapm_sync(codec);
		}

		static int omap3pandora_in_init(struct snd_soc_codec *codec)
		{
		int ret;

		ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
		ARRAY_SIZE(omap3pandora_in_dapm_widgets));
		if (ret < 0)
		return ret;

		snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
		ARRAY_SIZE(omap3pandora_in_map));

		return snd_soc_dapm_sync(codec);
		}

		static struct snd_soc_ops omap3pandora_out_ops = {
		.hw_params = omap3pandora_out_hw_params,
		};

		static struct snd_soc_ops omap3pandora_in_ops = {
		.hw_params = omap3pandora_in_hw_params,
		};

		/* Digital audio interface glue - connects codec <--> CPU */
		static struct snd_soc_dai_link omap3pandora_dai[] = {
		{
		.name = "PCM1773",
		.stream_name = "HiFi Out",
		.cpu_dai = &omap_mcbsp_dai[0],
		.codec_dai = &twl4030_dai,
		.ops = &omap3pandora_out_ops,
		.init = omap3pandora_out_init,
		}, {
		.name = "TWL4030",
		.stream_name = "Line/Mic In",
		.cpu_dai = &omap_mcbsp_dai[1],
		.codec_dai = &twl4030_dai,
		.ops = &omap3pandora_in_ops,
		.init = omap3pandora_in_init,
		}
		};

		/* SoC card */
		static struct snd_soc_card snd_soc_card_omap3pandora = {
		.name = "omap3pandora",
		.platform = &omap_soc_platform,
		.dai_link = omap3pandora_dai,
		.num_links = ARRAY_SIZE(omap3pandora_dai),
		};

		/* Audio subsystem */
		static struct snd_soc_device omap3pandora_snd_data = {
		.card = &snd_soc_card_omap3pandora,
		.codec_dev = &soc_codec_dev_twl4030,
		};

		static struct platform_device *omap3pandora_snd_device;

		static int __init omap3pandora_soc_init(void)
		{
		int ret;

		if (!machine_is_omap3_pandora()) {
		pr_debug(PREFIX "Not OMAP3 Pandora\n");
		return -ENODEV;
		}
		pr_info("OMAP3 Pandora SoC init\n");

		ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
		if (ret) {
		pr_err(PREFIX "Failed to get DAC power GPIO\n");
		return ret;
		}

		ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
		if (ret) {
		pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
		goto fail0;
		}

		ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
		if (ret) {
		pr_err(PREFIX "Failed to get amp power GPIO\n");
		goto fail0;
		}

		ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
		if (ret) {
		pr_err(PREFIX "Failed to set amp power GPIO direction\n");
		goto fail1;
		}

		omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
		if (omap3pandora_snd_device == NULL) {
		pr_err(PREFIX "Platform device allocation failed\n");
		ret = -ENOMEM;
		goto fail1;
		}

		platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
		omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
		(unsigned int )omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
		(unsigned int )omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */

		ret = platform_device_add(omap3pandora_snd_device);
		if (ret) {
		pr_err(PREFIX "Unable to add platform device\n");
		goto fail2;
		}

		return 0;

		fail2:
		platform_device_put(omap3pandora_snd_device);
		fail1:
		gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
		fail0:
		gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
		return ret;
		}
		module_init(omap3pandora_soc_init);

		static void __exit omap3pandora_soc_exit(void)
		{
		platform_device_unregister(omap3pandora_snd_device);
		gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
		gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
		}
		module_exit(omap3pandora_soc_exit);

		MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
		MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
		MODULE_LICENSE("GPL");