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253 lines
7.1 KiB
253 lines
7.1 KiB
From af9ef849e8700327b807361344427a43c38e823a Mon Sep 17 00:00:00 2001
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From: "Hebbar, Gururaja" <gururaja.hebbar@ti.com>
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Date: Tue, 31 Jul 2012 21:25:38 +0530
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Subject: [PATCH 212/752] ASoC: davinci-evm: Add device tree binding
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Device tree support for Davinci Machine driver
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When the board boots with device tree, the driver will receive card,
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codec, dai interface details (like the card name, DAPM routing map,
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phandle for the audio components described in the dts file, codec mclk
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speed). The card will be set up based on this information. Since the
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routing is provided via DT we can mark the card fully routed so core
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can take care of disconnecting the unused pins.
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Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
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Signed-off-by: Darren Etheridge <detheridge@ti.com>
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Signed-off-by: Jyri Sarha <jsarha@ti.com>
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---
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.../bindings/sound/davinci-evm-audio.txt | 58 ++++++++++
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sound/soc/davinci/davinci-evm.c | 120 +++++++++++++++++++-
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2 files changed, 176 insertions(+), 2 deletions(-)
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create mode 100644 Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/sound/davinci-evm-audio.txt
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@@ -0,0 +1,58 @@
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+* Texas Instruments SoC audio setups with TLV320AIC3X Codec
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+
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+Required properties:
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+- compatible : "ti,da830-evm-audio" : forDM365/DA8xx/OMAPL1x/AM33xx
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+- ti,model : The user-visible name of this sound complex.
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+- ti,audio-codec : The phandle of the TLV320AIC3x audio codec
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+- ti,mcasp-controller : The phandle of the McASP controller
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+- ti,codec-clock-rate : The Codec Clock rate (in Hz) applied to the Codec
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+- ti,audio-routing : A list of the connections between audio components.
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+ Each entry is a pair of strings, the first being the connection's sink,
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+ the second being the connection's source. Valid names for sources and
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+ sinks are the codec's pins, and the jacks on the board:
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+
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+ TLV320AIC3X pins:
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+
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+ * LLOUT
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+ * RLOUT
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+ * MONO_LOUT
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+ * HPLOUT
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+ * HPROUT
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+ * HPLCOM
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+ * HPRCOM
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+ * MIC3L
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+ * MIC3R
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+ * LINE1L
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+ * LINE2L
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+ * LINE1R
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+ * LINE2R
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+
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+ Board connectors:
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+
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+ * Headphone Jack
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+ * Line Out
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+ * Mic Jack
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+ * Line In
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+
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+
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+Example:
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+
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+sound {
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+ compatible = "ti,da830-evm-audio";
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+ ti,model = "DA830 EVM";
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+ ti,audio-codec = <&tlv320aic3x>;
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+ ti,mcasp-controller = <&mcasp1>;
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+ ti,codec-clock-rate = <12000000>;
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+ ti,audio-routing =
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+ "Headphone Jack", "HPLOUT",
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+ "Headphone Jack", "HPROUT",
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+ "Line Out", "LLOUT",
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+ "Line Out", "RLOUT",
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+ "MIC3L", "Mic Bias 2V",
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+ "MIC3R", "Mic Bias 2V",
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+ "Mic Bias 2V", "Mic Jack",
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+ "LINE1L", "Line In",
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+ "LINE2L", "Line In",
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+ "LINE1R", "Line In",
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+ "LINE2R", "Line In";
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+};
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--- a/sound/soc/davinci/davinci-evm.c
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+++ b/sound/soc/davinci/davinci-evm.c
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@@ -16,6 +16,7 @@
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#include <linux/platform_device.h>
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#include <linux/platform_data/edma.h>
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#include <linux/i2c.h>
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+#include <linux/of_platform.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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@@ -23,6 +24,8 @@
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#include <asm/dma.h>
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#include <asm/mach-types.h>
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+#include <linux/edma.h>
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+
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#include "davinci-pcm.h"
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#include "davinci-i2s.h"
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#include "davinci-mcasp.h"
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@@ -121,13 +124,22 @@ static int evm_aic3x_init(struct snd_soc
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{
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struct snd_soc_codec *codec = rtd->codec;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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+ struct device_node *np = codec->card->dev->of_node;
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+ int ret;
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/* Add davinci-evm specific widgets */
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snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
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ARRAY_SIZE(aic3x_dapm_widgets));
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- /* Set up davinci-evm specific audio path audio_map */
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- snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
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+ if (np) {
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+ ret = snd_soc_of_parse_audio_routing(codec->card,
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+ "ti,audio-routing");
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+ if (ret)
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+ return ret;
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+ } else {
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+ /* Set up davinci-evm specific audio path audio_map */
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+ snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
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+ }
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/* not connected */
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snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
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@@ -312,6 +324,98 @@ static struct snd_soc_card da850_snd_soc
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.drvdata = &da850_snd_soc_card_drvdata,
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};
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+#if defined(CONFIG_OF)
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+
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+/*
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+ * The struct is used as place holder. It will be completely
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+ * filled with data from dt node.
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+ */
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+static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
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+ .name = "TLV320AIC3X",
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+ .stream_name = "AIC3X",
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+ .codec_dai_name = "tlv320aic3x-hifi",
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+ .ops = &evm_ops,
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+ .init = evm_aic3x_init,
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+};
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+
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+static const struct of_device_id davinci_evm_dt_ids[] = {
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+ {
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+ .compatible = "ti,da830-evm-audio",
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+ .data = (void *) &evm_dai_tlv320aic3x,
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+ },
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+ { /* sentinel */ }
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+};
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+MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
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+
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+/* davinci evm audio machine driver */
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+static struct snd_soc_card evm_soc_card = {
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+ .owner = THIS_MODULE,
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+ .num_links = 1,
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+};
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+
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+static int davinci_evm_probe(struct platform_device *pdev)
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+{
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+ struct device_node *np = pdev->dev.of_node;
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+ const struct of_device_id *match =
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+ of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev);
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+ struct snd_soc_dai_link *dai = (struct snd_soc_dai_link *) match->data;
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+ struct snd_soc_card_drvdata_davinci *drvdata = NULL;
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+ int ret = 0;
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+
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+ evm_soc_card.dai_link = dai;
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+
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+ dai->codec_of_node = of_parse_phandle(np, "ti,audio-codec", 0);
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+ if (!dai->codec_of_node)
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+ return -EINVAL;
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+
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+ dai->cpu_of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
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+ if (!dai->cpu_of_node)
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+ return -EINVAL;
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+
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+ dai->platform_of_node = dai->cpu_of_node;
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+
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+ evm_soc_card.dev = &pdev->dev;
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+ ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
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+ if (ret)
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+ return ret;
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+
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+ drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
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+ if (!drvdata)
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+ return -ENOMEM;
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+
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+ ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
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+ if (ret < 0)
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+ return -EINVAL;
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+
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+ snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
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+ ret = snd_soc_register_card(&evm_soc_card);
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+
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+ if (ret)
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+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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+
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+ return ret;
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+}
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+
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+static int davinci_evm_remove(struct platform_device *pdev)
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+{
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+ struct snd_soc_card *card = platform_get_drvdata(pdev);
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+
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+ snd_soc_unregister_card(card);
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+
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+ return 0;
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+}
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+
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+static struct platform_driver davinci_evm_driver = {
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+ .probe = davinci_evm_probe,
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+ .remove = davinci_evm_remove,
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+ .driver = {
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+ .name = "davinci_evm",
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+ .owner = THIS_MODULE,
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+ .of_match_table = of_match_ptr(davinci_evm_dt_ids),
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+ },
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+};
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+#endif
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+
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static struct platform_device *evm_snd_device;
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static int __init evm_init(void)
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@@ -320,6 +424,13 @@ static int __init evm_init(void)
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int index;
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int ret;
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+ /*
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+ * If dtb is there, the devices will be created dynamically.
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+ * Only register platfrom driver structure.
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+ */
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+ if (of_have_populated_dt())
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+ return platform_driver_register(&davinci_evm_driver);
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+
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if (machine_is_davinci_evm()) {
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evm_snd_dev_data = &dm6446_snd_soc_card_evm;
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index = 0;
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@@ -355,6 +466,11 @@ static int __init evm_init(void)
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static void __exit evm_exit(void)
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{
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+ if (of_have_populated_dt()) {
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+ platform_driver_unregister(&davinci_evm_driver);
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+ return;
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+ }
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+
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platform_device_unregister(evm_snd_device);
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}
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