From: Rongjun Ying rongjun.ying@csr.com
This connects platform DAI, SiRF internal audio codec DAI and SiRF auido port DAI together and works as a mach driver.
Signed-off-by: Rongjun Ying rongjun.ying@csr.com --- .../devicetree/bindings/sound/sirf-audio.txt | 41 +++++ sound/soc/sirf/Kconfig | 5 + sound/soc/sirf/Makefile | 2 + sound/soc/sirf/sirf-audio.c | 156 ++++++++++++++++++++ 4 files changed, 204 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/sound/sirf-audio.txt create mode 100644 sound/soc/sirf/sirf-audio.c
diff --git a/Documentation/devicetree/bindings/sound/sirf-audio.txt b/Documentation/devicetree/bindings/sound/sirf-audio.txt new file mode 100644 index 0000000..c88882c --- /dev/null +++ b/Documentation/devicetree/bindings/sound/sirf-audio.txt @@ -0,0 +1,41 @@ +* SiRF atlas6 and prima2 internal audio codec and port based audio setups + +Required properties: +- compatible: "sirf,sirf-audio-card" +- sirf,audio-platform: phandle for the platform node +- sirf,audio-codec: phandle for the SiRF internal codec node + +Optional properties: +- hp-pa-gpios: Need to be present if the board need control external + headphone amplifier. +- spk-pa-gpios: Need to be present if the board need control external + speaker amplifier. +- hp-switch-gpios: Need to be present if the board capable to detect jack + insertion, removal. + +Available audio endpoints for the audio-routing table: + +Board connectors: + * Headset Stereophone + * Ext Spk + * Line In + * Mic + +SiRF internal audio codec pins: + * HPOUTL + * HPOUTR + * SPKOUT + * Ext Mic + * Mic Bias + +Example: + +sound { + compatible = "sirf,sirf-audio-card"; + sirf,audio-codec = <&audiocodec>; + sirf,audio-platform = <&audioport>; + hp-pa-gpios = <&gpio 44 0>; + spk-pa-gpios = <&gpio 46 0>; + hp-switch-gpios = <&gpio 45 0>; +}; + diff --git a/sound/soc/sirf/Kconfig b/sound/soc/sirf/Kconfig index 5b5407f..a8e083b 100644 --- a/sound/soc/sirf/Kconfig +++ b/sound/soc/sirf/Kconfig @@ -7,3 +7,8 @@ config SND_SOC_SIRF_AUDIO_PORT select REGMAP_MMIO tristate
+config SND_SOC_SIRF_AUDIO + tristate "SoC Audio support for SiRF internal audio codec" + depends on SND_SOC_SIRF + select SND_SOC_SIRF_AUDIO_CODEC + select SND_SOC_SIRF_AUDIO_PORT diff --git a/sound/soc/sirf/Makefile b/sound/soc/sirf/Makefile index fb012c8..4eea904 100644 --- a/sound/soc/sirf/Makefile +++ b/sound/soc/sirf/Makefile @@ -1,3 +1,5 @@ snd-soc-sirf-audio-port-objs := sirf-audio-port.o +snd-soc-sirf-audio-objs := sirf-audio.o
obj-$(CONFIG_SND_SOC_SIRF_AUDIO_PORT) += snd-soc-sirf-audio-port.o +obj-$(CONFIG_SND_SOC_SIRF_AUDIO) += snd-soc-sirf-audio.o diff --git a/sound/soc/sirf/sirf-audio.c b/sound/soc/sirf/sirf-audio.c new file mode 100644 index 0000000..ecef510 --- /dev/null +++ b/sound/soc/sirf/sirf-audio.c @@ -0,0 +1,156 @@ +/* + * SiRF audio card driver + * + * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> + +struct sirf_audio_card { + unsigned int gpio_hp_pa; + unsigned int gpio_spk_pa; +}; + +static int sirf_audio_hp_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *ctrl, int event) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + struct snd_soc_card *card = dapm->card; + struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card); + int on = !SND_SOC_DAPM_EVENT_OFF(event); + if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) + gpio_set_value(sirf_audio_card->gpio_hp_pa, on); + return 0; +} + +static int sirf_audio_spk_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *ctrl, int event) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + struct snd_soc_card *card = dapm->card; + struct sirf_audio_card *sirf_audio_card = snd_soc_card_get_drvdata(card); + int on = !SND_SOC_DAPM_EVENT_OFF(event); + + if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) + gpio_set_value(sirf_audio_card->gpio_spk_pa, on); + + return 0; +} +static const struct snd_soc_dapm_widget sirf_audio_dapm_widgets[] = { + SND_SOC_DAPM_HP("Hp", sirf_audio_hp_event), + SND_SOC_DAPM_SPK("Ext Spk", sirf_audio_spk_event), + SND_SOC_DAPM_MIC("Ext Mic", NULL), +}; + +static const struct snd_soc_dapm_route intercon[] = { + {"Hp", NULL, "HPOUTL"}, + {"Hp", NULL, "HPOUTR"}, + {"Ext Spk", NULL, "SPKOUT"}, + {"MICIN1", NULL, "Mic Bias"}, + {"Mic Bias", NULL, "Ext Mic"}, +}; + +/* Digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link sirf_audio_dai_link[] = { + { + .name = "SiRF audio card", + .stream_name = "SiRF audio HiFi", + .codec_dai_name = "sirf-audio-codec", + }, +}; + +/* Audio machine driver */ +static struct snd_soc_card snd_soc_sirf_audio_card = { + .name = "SiRF audio card", + .owner = THIS_MODULE, + .dai_link = sirf_audio_dai_link, + .num_links = ARRAY_SIZE(sirf_audio_dai_link), + .dapm_widgets = sirf_audio_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(sirf_audio_dapm_widgets), + .dapm_routes = intercon, + .num_dapm_routes = ARRAY_SIZE(intercon), +}; + +static int sirf_audio_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &snd_soc_sirf_audio_card; + struct sirf_audio_card *sirf_audio_card; + int ret; + + sirf_audio_card = devm_kzalloc(&pdev->dev, sizeof(struct sirf_audio_card), + GFP_KERNEL); + if (sirf_audio_card == NULL) + return -ENOMEM; + + sirf_audio_dai_link[0].cpu_of_node = + of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0); + sirf_audio_dai_link[0].platform_of_node = + of_parse_phandle(pdev->dev.of_node, "sirf,audio-platform", 0); + sirf_audio_dai_link[0].codec_of_node = + of_parse_phandle(pdev->dev.of_node, "sirf,audio-codec", 0); + sirf_audio_card->gpio_spk_pa = of_get_named_gpio(pdev->dev.of_node, + "spk-pa-gpios", 0); + sirf_audio_card->gpio_hp_pa = of_get_named_gpio(pdev->dev.of_node, + "hp-pa-gpios", 0); + if (gpio_is_valid(sirf_audio_card->gpio_spk_pa)) { + ret = devm_gpio_request_one(&pdev->dev, + sirf_audio_card->gpio_spk_pa, + GPIOF_OUT_INIT_LOW, "SPA_PA_SD"); + if (ret) { + dev_err(&pdev->dev, + "Failed to request GPIO_%d for reset: %d\n", + sirf_audio_card->gpio_spk_pa, ret); + return ret; + } + } + if (gpio_is_valid(sirf_audio_card->gpio_hp_pa)) { + ret = devm_gpio_request_one(&pdev->dev, + sirf_audio_card->gpio_hp_pa, + GPIOF_OUT_INIT_LOW, "HP_PA_SD"); + if (ret) { + dev_err(&pdev->dev, + "Failed to request GPIO_%d for reset: %d\n", + sirf_audio_card->gpio_hp_pa, ret); + return ret; + } + } + + card->dev = &pdev->dev; + snd_soc_card_set_drvdata(card, sirf_audio_card); + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret); + + return ret; +} + +static const struct of_device_id sirf_audio_of_match[] = { + {.compatible = "sirf,sirf-audio-card", }, + { }, +}; +MODULE_DEVICE_TABLE(of, sirf_audio_of_match); + +static struct platform_driver sirf_audio_driver = { + .driver = { + .name = "sirf-audio-card", + .owner = THIS_MODULE, + .pm = &snd_soc_pm_ops, + .of_match_table = sirf_audio_of_match, + }, + .probe = sirf_audio_probe, +}; +module_platform_driver(sirf_audio_driver); + +MODULE_AUTHOR("RongJun Ying RongJun.Ying@csr.com"); +MODULE_DESCRIPTION("ALSA SoC SIRF audio card driver"); +MODULE_LICENSE("GPL v2");