Added support for BeagleBoard-X15

Author: henrix

arch/arm/boot/dts/Makefile

@@ -473,6 +473,7 @@ dtb-$(CONFIG_SOC_DRA7XX) += \
 	dra72-evm-lcd-lg.dtb \
 	dra72-evm-lcd-osd.dtb \
 	am57xx-beagle-x15.dtb \
+	am57xx-beagle-x15-ctag.dtb \
 	am57xx-beagle-x15-es2plus.dtb \
 	dra72-evm.dtb \
 	am57xx-evm.dtb \

arch/arm/boot/dts/am57xx-beagle-x15-ctag.dts

@@ -0,0 +1,85 @@
+/*
+ * Device tree for BeagleBoard-X15 with CTAG face2|4 Audio Card
+ *
+ * Author:  Henrik Langer <[email protected]>
+ *
+ * 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.
+ */
+
+#include "am57xx-beagle-x15.dts"
+
+/ {
+	sound2: sound@2 {
+		compatible = "ctag,face-2-4";
+		model = "CTAG face-2-4 8CH";
+		audio-codec = <&ad193x>;
+		mcasp-controller = <&mcasp2>;
+		audiocard-tdm-slots = <8>;
+		codec-clock-rate = <24576000>;
+		bb-device = <1>; //0 = BBB/BBG, 1 = BB-X15
+		cpu-clock-rate = <22579200>;
+		audio-routing =
+			"Line Out",             "DAC1OUT",
+			"Line Out",             "DAC2OUT",
+			"Line Out",             "DAC3OUT",
+			"Line Out",             "DAC4OUT",
+			"ADC1IN",               "Line In",
+			"ADC2IN",               "Line In";
+	};
+};
+
+&dra7_pmx_core {
+	mcasp2_pins_default: mcasp2_pins_default {
+		pinctrl-single,pins = <
+			0x2F8 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp2_fsx 	 | P17.52 */
+			0x2F4 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp2_aclkx | P17.21 */
+			0x300 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp2_fsr 	 | P17.57 */
+			0x2FC (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp2_aclkr | P17.44 */
+			0x30C (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* mcasp2_axr2 | P17.18 */
+			0x304 (PIN_INPUT_PULLDOWN | MUX_MODE0) /* mcasp2_axr0  | P17.54 */
+		>;
+	};
+
+	mcspi3_pins_default: mcspi3_pins_default {
+		pinctrl-single,pins = <
+			0x2E0 (PIN_OUTPUT_PULLUP | MUX_MODE3) /* spi3_cs0  | P16.3 */
+			0x2D4 (PIN_INPUT_PULLUP | MUX_MODE3)  /* spi3_sclk | P16.34 */
+			0x2DC (PIN_INPUT_PULLUP | MUX_MODE3)  /* spi3_d0   | P16.33 */
+			0x2D8 (PIN_OUTPUT_PULLDOWN | MUX_MODE3) /* spi3_d1   | P16.4 */
+		>;
+	};
+};
+
+&mcspi3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcspi3_pins_default>;
+	status = "okay";
+
+	ad193x: ad193x@0{
+		compatible = "analog,ad1938";
+		reg = <0>;	
+		status = "okay";
+		spi-max-frequency = <100000>;
+	};
+};
+
+&mcasp2 {
+	#sound-dai-cells = <0>;
+	//assigned-clocks = <&mcasp2_ahclkx_mux>, <&mcasp2_ahclkr_mux>;
+	assigned-clocks = <&mcasp2_ahclkx_mux>;
+	assigned-clock-parents = <&sys_clkin2>; /* 22579200 Hz (see dra7xx-clocks.dtsi) */
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp2_pins_default>;
+	status = "okay";
+
+	op-mode = <0>;	/* MCASP_IIS_MODE */
+	tdm-slots = <8>;
+	/* 4 serializers */
+	serial-dir = <	/* 0: INACTIVE, 1: TX, 2: RX */
+		2 0 1 0
+	>;
+	tx-num-evt = <8>;
+	rx-num-evt = <8>;
+};

sound/soc/codecs/ad193x.c

@@ -247,7 +247,7 @@ static int ad193x_hw_params(struct snd_pcm_substream *substream,
 		struct snd_pcm_hw_params *params,
 		struct snd_soc_dai *dai)
 {
-	int word_len = 0, master_rate = 0, sample_rate = 0;
+	int word_len = 0, master_rate = 0, sample_rate = 0, i, ret;
 	struct snd_soc_codec *codec = dai->codec;
 	struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
 
@@ -312,6 +312,11 @@ static int ad193x_hw_params(struct snd_pcm_substream *substream,
 	regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL1,
 			    AD193X_ADC_WORD_LEN_MASK, word_len);
 
+	for(i=0; i<=16; i++){
+		regmap_read(ad193x->regmap , i, &ret) ;
+		dev_dbg(codec->dev, "AD193X register %d:\t0x%x", i, ret);
+	}
+
 	return 0;
 }
 

sound/soc/davinci/davinci-ctag-face-2-4.c

@@ -237,7 +237,8 @@ static int snd_davinci_audiocard_probe(struct platform_device *pdev)
 	struct snd_soc_dai_link *dai = (struct snd_soc_dai_link *) match->data;
 	struct snd_soc_card_drvdata_davinci *drvdata = NULL;
 	struct clk *mclk;
-	int ret = 0;
+	int ret = 0, bb_device = 0;
+	
 
 	snd_davinci_audiocard.dai_link = dai;
 
@@ -279,25 +280,40 @@ static int snd_davinci_audiocard_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	ret = of_property_read_u32(np, "bb-device", &bb_device);
+	if (ret < 0){
+		dev_warn(&pdev->dev, "No BeagleBoard device specified (0=BBB/BBG, 1=BB-X15).\n\
+			Using BeagleBone Black/Green as default device.\n");
+		bb_device = 0;
+	}
+
 	/*
-		Configure internal 24,576 MHz oscillator as master clock for McASP
+		Configure CPU DAI clock of specific BeagleBoard SBC
 	*/
-	ret = of_property_read_u32(np, "cpu-clock-rate", &drvdata->sysclk);
-	if (ret < 0) {
-		if (!drvdata->mclk) {
-			dev_err(&pdev->dev,
-				"No clock or clock rate defined.\n");
-			return -EINVAL;
+	if (bb_device == 0){ //BeagleBone Black/Green
+		/*
+			Configure internal 24,576 MHz oscillator as master clock for McASP
+		*/
+		ret = of_property_read_u32(np, "cpu-clock-rate", &drvdata->sysclk);
+		if (ret < 0) {
+			if (!drvdata->mclk) {
+				dev_err(&pdev->dev, "No clock or clock rate defined.\n");
+				return -EINVAL;
+			}
+			drvdata->sysclk = clk_get_rate(drvdata->mclk);
+		} else if (drvdata->mclk) {
+			unsigned int requestd_rate = drvdata->sysclk;
+			clk_set_rate(drvdata->mclk, drvdata->sysclk);
+			drvdata->sysclk = clk_get_rate(drvdata->mclk);
+			if (drvdata->sysclk != requestd_rate)
+				dev_warn(&pdev->dev, "Could not get requested rate %u using %u.\n",
+				 	requestd_rate, drvdata->sysclk);
 		}
-		drvdata->sysclk = clk_get_rate(drvdata->mclk);
-	} else if (drvdata->mclk) {
-		unsigned int requestd_rate = drvdata->sysclk;
-		clk_set_rate(drvdata->mclk, drvdata->sysclk);
-		drvdata->sysclk = clk_get_rate(drvdata->mclk);
-		if (drvdata->sysclk != requestd_rate)
-			dev_warn(&pdev->dev,
-				 "Could not get requested rate %u using %u.\n",
-				 requestd_rate, drvdata->sysclk);
+	}
+	else if (bb_device == 1){ //BeagleBoard-X15
+		/*
+			Nothing to do (CPU DAI clock is configured in dra7.dtsi)
+		*/
 	}
 
 	/*
@@ -319,12 +335,12 @@ static int snd_davinci_audiocard_remove(struct platform_device *pdev)
 
 /* Sound card platform driver */
 static struct platform_driver snd_davinci_audiocard_driver = {
-	.probe          = snd_davinci_audiocard_probe,
 	.driver = {
 		.name   = "snd_ctag_face_2_4",
 		.pm = &snd_soc_pm_ops,
 		.of_match_table = of_match_ptr(snd_davinci_audiocard_dt_ids),
 	},
+	.probe = snd_davinci_audiocard_probe,
 	.remove = snd_davinci_audiocard_remove,
 };