avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/sound/sound-i2s.c

@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * R. Chandrasekar <rcsekar@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <malloc.h>
+#include <common.h>
+#include <asm/io.h>
+#include <libfdt.h>
+#include <fdtdec.h>
+#include <i2c.h>
+#include <i2s.h>
+#include <sound.h>
+#include <asm/arch/sound.h>
+#include "wm8994.h"
+#include "max98095.h"
+
+/* defines */
+#define SOUND_400_HZ 400
+#define SOUND_BITS_IN_BYTE 8
+
+static struct i2stx_info g_i2stx_pri;
+
+/*
+ * get_sound_i2s_values gets values for i2s parameters
+ *
+ * @param i2stx_info	i2s transmitter transfer param structure
+ * @param blob		FDT blob if enabled else NULL
+ */
+static int get_sound_i2s_values(struct i2stx_info *i2s, const void *blob)
+{
+	int node;
+	int error = 0;
+	int base;
+
+	node = fdt_path_offset(blob, "i2s");
+	if (node <= 0) {
+		debug("EXYNOS_SOUND: No node for sound in device tree\n");
+		return -1;
+	}
+
+	/*
+	 * Get the pre-defined sound specific values from FDT.
+	 * All of these are expected to be correct otherwise
+	 * wrong register values in i2s setup parameters
+	 * may result in no sound play.
+	 */
+	base = fdtdec_get_addr(blob, node, "reg");
+	if (base == FDT_ADDR_T_NONE) {
+		debug("%s: Missing  i2s base\n", __func__);
+		return -1;
+	}
+	i2s->base_address = base;
+
+	i2s->audio_pll_clk = fdtdec_get_int(blob,
+				node, "samsung,i2s-epll-clock-frequency", -1);
+	error |= i2s->audio_pll_clk;
+	debug("audio_pll_clk = %d\n", i2s->audio_pll_clk);
+	i2s->samplingrate = fdtdec_get_int(blob,
+				node, "samsung,i2s-sampling-rate", -1);
+	error |= i2s->samplingrate;
+	debug("samplingrate = %d\n", i2s->samplingrate);
+	i2s->bitspersample = fdtdec_get_int(blob,
+				node, "samsung,i2s-bits-per-sample", -1);
+	error |= i2s->bitspersample;
+	debug("bitspersample = %d\n", i2s->bitspersample);
+	i2s->channels = fdtdec_get_int(blob,
+			node, "samsung,i2s-channels", -1);
+	error |= i2s->channels;
+	debug("channels = %d\n", i2s->channels);
+	i2s->rfs = fdtdec_get_int(blob,
+				node, "samsung,i2s-lr-clk-framesize", -1);
+	error |= i2s->rfs;
+	debug("rfs = %d\n", i2s->rfs);
+	i2s->bfs = fdtdec_get_int(blob,
+				node, "samsung,i2s-bit-clk-framesize", -1);
+	error |= i2s->bfs;
+	debug("bfs = %d\n", i2s->bfs);
+
+	i2s->id = fdtdec_get_int(blob, node, "samsung,i2s-id", -1);
+	error |= i2s->id;
+	debug("id = %d\n", i2s->id);
+
+	if (error == -1) {
+		debug("fail to get sound i2s node properties\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Init codec
+ *
+ * @param blob          FDT blob
+ * @param pi2s_tx	i2s parameters required by codec
+ * @return              int value, 0 for success
+ */
+static int codec_init(const void *blob, struct i2stx_info *pi2s_tx)
+{
+	int ret;
+	const char *codectype;
+	int node;
+
+	/* Get the node from FDT for sound */
+	node = fdt_path_offset(blob, "i2s");
+	if (node <= 0) {
+		debug("EXYNOS_SOUND: No node for sound in device tree\n");
+		debug("node = %d\n", node);
+		return -1;
+	}
+
+	/*
+	 * Get the pre-defined sound codec specific values from FDT.
+	 * All of these are expected to be correct otherwise sound
+	 * can not be played
+	 */
+	codectype = fdt_getprop(blob, node, "samsung,codec-type", NULL);
+	debug("device = %s\n", codectype);
+	if (!strcmp(codectype, "wm8994")) {
+		/* Check the codec type and initialise the same */
+		ret = wm8994_init(blob, pi2s_tx->id + 1,
+				  pi2s_tx->samplingrate,
+				  (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
+				  pi2s_tx->bitspersample, pi2s_tx->channels);
+	} else if (!strcmp(codectype, "max98095")) {
+		ret = max98095_init(blob, pi2s_tx->id + 1,
+				    pi2s_tx->samplingrate,
+				    (pi2s_tx->samplingrate * (pi2s_tx->rfs)),
+				    pi2s_tx->bitspersample);
+	} else {
+		debug("%s: Unknown codec type %s\n", __func__, codectype);
+		return -1;
+	}
+
+	if (ret) {
+		debug("%s: Codec init failed\n", __func__);
+		return -1;
+	}
+
+	return 0;
+}
+
+int sound_init(const void *blob)
+{
+	int ret;
+	struct i2stx_info *pi2s_tx = &g_i2stx_pri;
+
+	/* Get the I2S Values */
+	if (get_sound_i2s_values(pi2s_tx, blob) < 0) {
+		debug(" FDT I2S values failed\n");
+		return -1;
+	}
+
+	if (codec_init(blob, pi2s_tx) < 0) {
+		debug(" Codec init failed\n");
+		return -1;
+	}
+
+	ret = i2s_tx_init(pi2s_tx);
+	if (ret) {
+		debug("%s: Failed to init i2c transmit: ret=%d\n", __func__,
+		      ret);
+		return ret;
+	}
+
+
+	return ret;
+}
+
+int sound_play(uint32_t msec, uint32_t frequency)
+{
+	unsigned int *data;
+	unsigned long data_size;
+	unsigned int ret = 0;
+
+	/*Buffer length computation */
+	data_size = g_i2stx_pri.samplingrate * g_i2stx_pri.channels;
+	data_size *= (g_i2stx_pri.bitspersample / SOUND_BITS_IN_BYTE);
+	data = malloc(data_size);
+
+	if (data == NULL) {
+		debug("%s: malloc failed\n", __func__);
+		return -1;
+	}
+
+	sound_create_square_wave((unsigned short *)data,
+				 data_size / sizeof(unsigned short),
+				 frequency);
+
+	while (msec >= 1000) {
+		ret = i2s_transfer_tx_data(&g_i2stx_pri, data,
+					   (data_size / sizeof(int)));
+		msec -= 1000;
+	}
+	if (msec) {
+		unsigned long size =
+			(data_size * msec) / (sizeof(int) * 1000);
+
+		ret = i2s_transfer_tx_data(&g_i2stx_pri, data, size);
+	}
+
+	free(data);
+
+	return ret;
+}