1 files changed, 456 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/sound/samsung-i2s.c b/roms/u-boot/drivers/sound/samsung-i2s.c
new file mode 100644
index 000000000..d3d75c046
--- /dev/null
+++ b/roms/u-boot/drivers/sound/samsung-i2s.c
@@ -0,0 +1,456 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * R. Chandrasekar <rcsekar@samsung.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2s.h>
+#include <log.h>
+#include <sound.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/i2s-regs.h>
+#include <asm/io.h>
+
+#define FIC_TX2COUNT(x)		(((x) >>  24) & 0xf)
+#define FIC_TX1COUNT(x)		(((x) >>  16) & 0xf)
+#define FIC_TXCOUNT(x)		(((x) >>  8) & 0xf)
+#define FIC_RXCOUNT(x)		(((x) >>  0) & 0xf)
+#define FICS_TXCOUNT(x)		(((x) >>  8) & 0x7f)
+
+#define TIMEOUT_I2S_TX		100	/* i2s transfer timeout */
+
+/*
+ * Sets the frame size for I2S LR clock
+ *
+ * @param i2s_reg	i2s register address
+ * @param rfs		Frame Size
+ */
+static void i2s_set_lr_framesize(struct i2s_reg *i2s_reg, unsigned int rfs)
+{
+	unsigned int mod = readl(&i2s_reg->mod);
+
+	mod &= ~MOD_RCLK_MASK;
+
+	switch (rfs) {
+	case 768:
+		mod |= MOD_RCLK_768FS;
+		break;
+	case 512:
+		mod |= MOD_RCLK_512FS;
+		break;
+	case 384:
+		mod |= MOD_RCLK_384FS;
+		break;
+	default:
+		mod |= MOD_RCLK_256FS;
+		break;
+	}
+
+	writel(mod, &i2s_reg->mod);
+}
+
+/*
+ * Sets the i2s transfer control
+ *
+ * @param i2s_reg	i2s register address
+ * @param on		1 enable tx , 0 disable tx transfer
+ */
+static void i2s_txctrl(struct i2s_reg *i2s_reg, int on)
+{
+	unsigned int con = readl(&i2s_reg->con);
+	unsigned int mod = readl(&i2s_reg->mod) & ~MOD_MASK;
+
+	if (on) {
+		con |= CON_ACTIVE;
+		con &= ~CON_TXCH_PAUSE;
+	} else {
+		con |=  CON_TXCH_PAUSE;
+		con &= ~CON_ACTIVE;
+	}
+
+	writel(mod, &i2s_reg->mod);
+	writel(con, &i2s_reg->con);
+}
+
+/*
+ * set the bit clock frame size (in multiples of LRCLK)
+ *
+ * @param i2s_reg	i2s register address
+ * @param bfs		bit Frame Size
+ */
+static void i2s_set_bitclk_framesize(struct i2s_reg *i2s_reg, unsigned bfs)
+{
+	unsigned int mod = readl(&i2s_reg->mod);
+
+	mod &= ~MOD_BCLK_MASK;
+
+	switch (bfs) {
+	case 48:
+		mod |= MOD_BCLK_48FS;
+		break;
+	case 32:
+		mod |= MOD_BCLK_32FS;
+		break;
+	case 24:
+		mod |= MOD_BCLK_24FS;
+		break;
+	case 16:
+		mod |= MOD_BCLK_16FS;
+		break;
+	default:
+		return;
+	}
+	writel(mod, &i2s_reg->mod);
+}
+
+/*
+ * flushes the i2stx fifo
+ *
+ * @param i2s_reg	i2s register address
+ * @param flush		Tx fifo flush command (0x00 - do not flush
+ *				0x80 - flush tx fifo)
+ */
+static void i2s_fifo(struct i2s_reg *i2s_reg, unsigned int flush)
+{
+	/* Flush the FIFO */
+	setbits_le32(&i2s_reg->fic, flush);
+	clrbits_le32(&i2s_reg->fic, flush);
+}
+
+/*
+ * Set System Clock direction
+ *
+ * @param i2s_reg	i2s register address
+ * @param dir		Clock direction
+ *
+ * @return		int value 0 for success, -1 in case of error
+ */
+static int i2s_set_sysclk_dir(struct i2s_reg *i2s_reg, int dir)
+{
+	unsigned int mod = readl(&i2s_reg->mod);
+
+	if (dir == SND_SOC_CLOCK_IN)
+		mod |= MOD_CDCLKCON;
+	else
+		mod &= ~MOD_CDCLKCON;
+
+	writel(mod, &i2s_reg->mod);
+
+	return 0;
+}
+
+/*
+ * Sets I2S Clcok format
+ *
+ * @param fmt		i2s clock properties
+ * @param i2s_reg	i2s register address
+ *
+ * @return		int value 0 for success, -1 in case of error
+ */
+static int i2s_set_fmt(struct i2s_reg *i2s_reg, unsigned int fmt)
+{
+	unsigned int mod = readl(&i2s_reg->mod);
+	unsigned int tmp = 0;
+	unsigned int ret = 0;
+
+	/* Format is priority */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_RIGHT_J:
+		tmp |= MOD_LR_RLOW;
+		tmp |= MOD_SDF_MSB;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		tmp |= MOD_LR_RLOW;
+		tmp |= MOD_SDF_LSB;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		tmp |= MOD_SDF_IIS;
+		break;
+	default:
+		debug("%s: Invalid format priority [0x%x]\n", __func__,
+		      (fmt & SND_SOC_DAIFMT_FORMAT_MASK));
+		return -ERANGE;
+	}
+
+	/*
+	 * INV flag is relative to the FORMAT flag - if set it simply
+	 * flips the polarity specified by the Standard
+	 */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		if (tmp & MOD_LR_RLOW)
+			tmp &= ~MOD_LR_RLOW;
+		else
+			tmp |= MOD_LR_RLOW;
+		break;
+	default:
+		debug("%s: Invalid clock ploarity input [0x%x]\n", __func__,
+		      (fmt & SND_SOC_DAIFMT_INV_MASK));
+		return -ERANGE;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		tmp |= MOD_SLAVE;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		/* Set default source clock in Master mode */
+		ret = i2s_set_sysclk_dir(i2s_reg, SND_SOC_CLOCK_OUT);
+		if (ret != 0) {
+			debug("%s:set i2s clock direction failed\n", __func__);
+			return ret;
+		}
+		break;
+	default:
+		debug("%s: Invalid master selection [0x%x]\n", __func__,
+		      (fmt & SND_SOC_DAIFMT_MASTER_MASK));
+		return -ERANGE;
+	}
+
+	mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
+	mod |= tmp;
+	writel(mod, &i2s_reg->mod);
+
+	return 0;
+}
+
+/*
+ * Sets the sample width in bits
+ *
+ * @param blc		samplewidth (size of sample in bits)
+ * @param i2s_reg	i2s register address
+ *
+ * @return		int value 0 for success, -1 in case of error
+ */
+static int i2s_set_samplesize(struct i2s_reg *i2s_reg, unsigned int blc)
+{
+	unsigned int mod = readl(&i2s_reg->mod);
+
+	mod &= ~MOD_BLCP_MASK;
+	mod &= ~MOD_BLC_MASK;
+
+	switch (blc) {
+	case 8:
+		mod |= MOD_BLCP_8BIT;
+		mod |= MOD_BLC_8BIT;
+		break;
+	case 16:
+		mod |= MOD_BLCP_16BIT;
+		mod |= MOD_BLC_16BIT;
+		break;
+	case 24:
+		mod |= MOD_BLCP_24BIT;
+		mod |= MOD_BLC_24BIT;
+		break;
+	default:
+		debug("%s: Invalid sample size input [0x%x]\n",
+		      __func__, blc);
+		return -ERANGE;
+	}
+	writel(mod, &i2s_reg->mod);
+
+	return 0;
+}
+
+int i2s_transfer_tx_data(struct i2s_uc_priv *pi2s_tx, void *data,
+			 uint data_size)
+{
+	struct i2s_reg *i2s_reg = (struct i2s_reg *)pi2s_tx->base_address;
+	u32 *ptr;
+	int i;
+	int start;
+
+	if (data_size < FIFO_LENGTH) {
+		debug("%s : Invalid data size\n", __func__);
+		return -ENODATA; /* invalid pcm data size */
+	}
+
+	/* fill the tx buffer before stating the tx transmit */
+	for (i = 0, ptr = data; i < FIFO_LENGTH; i++)
+		writel(*ptr++, &i2s_reg->txd);
+
+	data_size -= sizeof(*ptr) * FIFO_LENGTH;
+	i2s_txctrl(i2s_reg, I2S_TX_ON);
+
+	while (data_size > 0) {
+		start = get_timer(0);
+		if (!(CON_TXFIFO_FULL & (readl(&i2s_reg->con)))) {
+			writel(*ptr++, &i2s_reg->txd);
+			data_size -= sizeof(*ptr);
+		} else {
+			if (get_timer(start) > TIMEOUT_I2S_TX) {
+				i2s_txctrl(i2s_reg, I2S_TX_OFF);
+				debug("%s: I2S Transfer Timeout\n", __func__);
+				return -ETIMEDOUT;
+			}
+		}
+	}
+	i2s_txctrl(i2s_reg, I2S_TX_OFF);
+
+	return 0;
+}
+
+static int i2s_tx_init(struct i2s_uc_priv *pi2s_tx)
+{
+	int ret;
+	struct i2s_reg *i2s_reg = (struct i2s_reg *)pi2s_tx->base_address;
+
+	if (pi2s_tx->id == 0) {
+		/* Initialize GPIO for I2S-0 */
+		exynos_pinmux_config(PERIPH_ID_I2S0, 0);
+
+		/* Set EPLL Clock */
+		ret = set_epll_clk(pi2s_tx->samplingrate * pi2s_tx->rfs * 4);
+	} else if (pi2s_tx->id == 1) {
+		/* Initialize GPIO for I2S-1 */
+		exynos_pinmux_config(PERIPH_ID_I2S1, 0);
+
+		/* Set EPLL Clock */
+		ret = set_epll_clk(pi2s_tx->audio_pll_clk);
+	} else {
+		debug("%s: unsupported i2s-%d bus\n", __func__, pi2s_tx->id);
+		return -ERANGE;
+	}
+
+	if (ret) {
+		debug("%s: epll clock set rate failed\n", __func__);
+		return ret;
+	}
+
+	/* Select Clk Source for Audio 0 or 1 */
+	ret = set_i2s_clk_source(pi2s_tx->id);
+	if (ret) {
+		debug("%s: unsupported clock for i2s-%d\n", __func__,
+		      pi2s_tx->id);
+		return ret;
+	}
+
+	if (pi2s_tx->id == 0) {
+		/*Reset the i2s module */
+		writel(CON_RESET, &i2s_reg->con);
+
+		writel(MOD_OP_CLK | MOD_RCLKSRC, &i2s_reg->mod);
+		/* set i2s prescaler */
+		writel(PSREN | PSVAL, &i2s_reg->psr);
+	} else {
+		/* Set Prescaler to get MCLK */
+		ret = set_i2s_clk_prescaler(pi2s_tx->audio_pll_clk,
+				(pi2s_tx->samplingrate * (pi2s_tx->rfs)),
+				pi2s_tx->id);
+	}
+	if (ret) {
+		debug("%s: unsupported prescalar for i2s-%d\n", __func__,
+		      pi2s_tx->id);
+		return ret;
+	}
+
+	/* Configure I2s format */
+	ret = i2s_set_fmt(i2s_reg, SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			  SND_SOC_DAIFMT_CBM_CFM);
+	if (ret == 0) {
+		i2s_set_lr_framesize(i2s_reg, pi2s_tx->rfs);
+		ret = i2s_set_samplesize(i2s_reg, pi2s_tx->bitspersample);
+		if (ret != 0) {
+			debug("%s:set sample rate failed\n", __func__);
+			return ret;
+		}
+
+		i2s_set_bitclk_framesize(i2s_reg, pi2s_tx->bfs);
+		/* disable i2s transfer flag and flush the fifo */
+		i2s_txctrl(i2s_reg, I2S_TX_OFF);
+		i2s_fifo(i2s_reg, FIC_TXFLUSH);
+	} else {
+		debug("%s: failed\n", __func__);
+	}
+
+	return ret;
+}
+
+static int samsung_i2s_tx_data(struct udevice *dev, void *data, uint data_size)
+{
+	struct i2s_uc_priv *priv = dev_get_uclass_priv(dev);
+
+	return i2s_transfer_tx_data(priv, data, data_size);
+}
+
+static int samsung_i2s_probe(struct udevice *dev)
+{
+	struct i2s_uc_priv *priv = dev_get_uclass_priv(dev);
+
+	return i2s_tx_init(priv);
+}
+
+static int samsung_i2s_of_to_plat(struct udevice *dev)
+{
+	struct i2s_uc_priv *priv = dev_get_uclass_priv(dev);
+	ulong base;
+
+	/*
+	 * 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 = dev_read_addr(dev);
+	if (base == FDT_ADDR_T_NONE) {
+		debug("%s: Missing  i2s base\n", __func__);
+		return -EINVAL;
+	}
+	priv->base_address = base;
+
+	if (dev_read_u32u(dev, "samsung,i2s-epll-clock-frequency",
+			  &priv->audio_pll_clk))
+		goto err;
+	debug("audio_pll_clk = %d\n", priv->audio_pll_clk);
+	if (dev_read_u32u(dev, "samsung,i2s-sampling-rate",
+			  &priv->samplingrate))
+		goto err;
+	debug("samplingrate = %d\n", priv->samplingrate);
+	if (dev_read_u32u(dev, "samsung,i2s-bits-per-sample",
+			  &priv->bitspersample))
+		goto err;
+	debug("bitspersample = %d\n", priv->bitspersample);
+	if (dev_read_u32u(dev, "samsung,i2s-channels", &priv->channels))
+		goto err;
+	debug("channels = %d\n", priv->channels);
+	if (dev_read_u32u(dev, "samsung,i2s-lr-clk-framesize", &priv->rfs))
+		goto err;
+	debug("rfs = %d\n", priv->rfs);
+	if (dev_read_u32u(dev, "samsung,i2s-bit-clk-framesize", &priv->bfs))
+		goto err;
+	debug("bfs = %d\n", priv->bfs);
+
+	if (dev_read_u32u(dev, "samsung,i2s-id", &priv->id))
+		goto err;
+	debug("id = %d\n", priv->id);
+
+	return 0;
+
+err:
+	debug("fail to get sound i2s node properties\n");
+
+	return -EINVAL;
+}
+
+static const struct i2s_ops samsung_i2s_ops = {
+	.tx_data	= samsung_i2s_tx_data,
+};
+
+static const struct udevice_id samsung_i2s_ids[] = {
+	{ .compatible = "samsung,s5pv210-i2s" },
+	{ }
+};
+
+U_BOOT_DRIVER(samsung_i2s) = {
+	.name		= "samsung_i2s",
+	.id		= UCLASS_I2S,
+	.of_match	= samsung_i2s_ids,
+	.probe		= samsung_i2s_probe,
+	.of_to_plat	= samsung_i2s_of_to_plat,
+	.ops		= &samsung_i2s_ops,
+};