diff options
Diffstat (limited to 'sound/soc/imx/imx-3stack-ak5702.c')
| -rw-r--r-- | sound/soc/imx/imx-3stack-ak5702.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-3stack-ak5702.c b/sound/soc/imx/imx-3stack-ak5702.c new file mode 100644 index 000000000000..d90252b729fd --- /dev/null +++ b/sound/soc/imx/imx-3stack-ak5702.c @@ -0,0 +1,226 @@ +/* + * imx-3stack-ak5702.c -- SoC audio for imx_3stack + * + * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/regulator/consumer.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> + +#include <mach/hardware.h> +#include <mach/clock.h> + +#include "imx-pcm.h" +#include "imx-esai.h" +#include "../codecs/ak5702.h" + +struct imx_3stack_pcm_state { + int lr_clk_active; +}; + +static struct imx_3stack_pcm_state clk_state; + +static int imx_3stack_startup(struct snd_pcm_substream *substream) +{ + clk_state.lr_clk_active++; + return 0; +} + +static void imx_3stack_shutdown(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai_link *pcm_link = rtd->dai; + struct snd_soc_dai *codec_dai = pcm_link->codec_dai; + + /* disable the PLL if there are no active Rx channels */ + if (!codec_dai->active) + snd_soc_dai_set_pll(codec_dai, 0, 0, 0, 0); + clk_state.lr_clk_active--; +} + +static int imx_3stack_surround_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_link *pcm_link = rtd->dai; + struct snd_soc_dai *cpu_dai = pcm_link->cpu_dai; + struct snd_soc_dai *codec_dai = pcm_link->codec_dai; + unsigned int rate = params_rate(params); + struct imx_esai *esai_mode = (struct imx_esai *)cpu_dai->private_data; + u32 dai_format; + + if (clk_state.lr_clk_active > 1) + return 0; + + dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM; + + esai_mode->sync_mode = 0; + esai_mode->network_mode = 1; + + /* set codec DAI configuration */ + snd_soc_dai_set_fmt(codec_dai, dai_format); + + /* set cpu DAI configuration */ + snd_soc_dai_set_fmt(cpu_dai, dai_format); + + /* set i.MX active slot mask */ + snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffff, 0xffffffff, 2, 0); + + /* set the ESAI system clock as input */ + snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN); + + /* set codec BCLK division */ + snd_soc_dai_set_clkdiv(codec_dai, AK5702_BCLK_CLKDIV, + AK5702_BCLK_DIV_32); + + snd_soc_dai_set_sysclk(codec_dai, 0, rate, SND_SOC_CLOCK_OUT); + + snd_soc_dai_set_pll(codec_dai, 1, 0, 12000000, 0); + return 0; +} + +/* + * imx_3stack ak5702 DAI opserations. + */ +static struct snd_soc_ops imx_3stack_surround_ops = { + .startup = imx_3stack_startup, + .shutdown = imx_3stack_shutdown, + .hw_params = imx_3stack_surround_hw_params, +}; + +/* imx_3stack card dapm widgets */ +static const struct snd_soc_dapm_widget imx_3stack_dapm_widgets[] = { + SND_SOC_DAPM_LINE("Line In Jack", NULL), +}; + +/* example card audio map */ +static const struct snd_soc_dapm_route audio_map[] = { + /* Line in jack */ + {"ADCA Left Input", NULL, "Line In Jack"}, + {"ADCA Right Input", NULL, "Line In Jack"}, + {"ADCB Left Input", NULL, "Line In Jack"}, + {"ADCB Right Input", NULL, "Line In Jack"}, +}; + +static int imx_3stack_ak5702_init(struct snd_soc_codec *codec) +{ + snd_soc_dapm_new_controls(codec, imx_3stack_dapm_widgets, + ARRAY_SIZE(imx_3stack_dapm_widgets)); + snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); + snd_soc_dapm_sync(codec); + return 0; +} + +static struct snd_soc_dai_link imx_3stack_dai = { + .name = "ak5702", + .stream_name = "ak5702", + .codec_dai = &ak5702_dai, + .init = imx_3stack_ak5702_init, + .ops = &imx_3stack_surround_ops, +}; + +static int imx_3stack_card_remove(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + + kfree(socdev->codec_data); + return 0; +} + +static struct snd_soc_card snd_soc_card_imx_3stack = { + .name = "imx-3stack", + .platform = &imx_soc_platform, + .dai_link = &imx_3stack_dai, + .num_links = 1, + .remove = imx_3stack_card_remove, +}; + +static struct snd_soc_device imx_3stack_snd_devdata = { + .card = &snd_soc_card_imx_3stack, + .codec_dev = &soc_codec_dev_ak5702, +}; + +static int __devinit imx_3stack_ak5702_probe(struct platform_device *pdev) +{ + struct ak5702_setup_data *setup; + + imx_3stack_dai.cpu_dai = &imx_esai_dai[2]; + + setup = kzalloc(sizeof(struct ak5702_setup_data), GFP_KERNEL); + setup->i2c_bus = 1; + setup->i2c_address = 0x13; + imx_3stack_snd_devdata.codec_data = setup; + + return 0; +} + +static int imx_3stack_ak5702_remove(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver imx_3stack_ak5702_driver = { + .probe = imx_3stack_ak5702_probe, + .remove = imx_3stack_ak5702_remove, + .driver = { + .name = "imx-3stack-ak5702", + }, +}; + +static struct platform_device *imx_3stack_snd_device; + +static int __init imx_3stack_asoc_init(void) +{ + int ret; + + ret = platform_driver_register(&imx_3stack_ak5702_driver); + if (ret) + return -ENOMEM; + + imx_3stack_snd_device = platform_device_alloc("soc-audio", -1); + if (!imx_3stack_snd_device) + return -ENOMEM; + + platform_set_drvdata(imx_3stack_snd_device, &imx_3stack_snd_devdata); + imx_3stack_snd_devdata.dev = &imx_3stack_snd_device->dev; + ret = platform_device_add(imx_3stack_snd_device); + if (ret) + platform_device_put(imx_3stack_snd_device); + + return ret; +} + +static void __exit imx_3stack_asoc_exit(void) +{ + platform_driver_unregister(&imx_3stack_ak5702_driver); + platform_device_unregister(imx_3stack_snd_device); +} + +module_init(imx_3stack_asoc_init); +module_exit(imx_3stack_asoc_exit); + +/* Module information */ +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("ALSA SoC ak5702 imx_3stack"); +MODULE_LICENSE("GPL"); |