ASoC: zte: spdif and i2s drivers are not zx296702 specific

ZTE ZX SPDIF and I2S drivers can work on not only ZX296702 but also
other ZTE ZX family SoCs like ZX296718, which is an arm64 platform.
Let's make a few renaming and tweak the Kconfig a bit to get the drivers
available for other ZTE ZX platforms.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 436 insertions, 0 deletions

diff --git a/sound/soc/zte/zx-i2s.c b/sound/soc/zte/zx-i2s.c
new file mode 100644
index 000000000000..1cad93dc1fcf
--- /dev/null
+++ b/sound/soc/zte/zx-i2s.c
@@ -0,0 +1,436 @@
+/*
+ * Copyright (C) 2015 Linaro
+ *
+ * Author: Jun Nie <jun.nie@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define ZX_I2S_PROCESS_CTRL	0x04
+#define ZX_I2S_TIMING_CTRL	0x08
+#define	ZX_I2S_FIFO_CTRL	0x0C
+#define	ZX_I2S_FIFO_STATUS	0x10
+#define ZX_I2S_INT_EN		0x14
+#define ZX_I2S_INT_STATUS	0x18
+#define ZX_I2S_DATA		0x1C
+#define ZX_I2S_FRAME_CNTR	0x20
+
+#define I2S_DEAGULT_FIFO_THRES	(0x10)
+#define I2S_MAX_FIFO_THRES	(0x20)
+
+#define ZX_I2S_PROCESS_TX_EN	(1 << 0)
+#define ZX_I2S_PROCESS_TX_DIS	(0 << 0)
+#define ZX_I2S_PROCESS_RX_EN	(1 << 1)
+#define ZX_I2S_PROCESS_RX_DIS	(0 << 1)
+#define ZX_I2S_PROCESS_I2S_EN	(1 << 2)
+#define ZX_I2S_PROCESS_I2S_DIS	(0 << 2)
+
+#define ZX_I2S_TIMING_MAST		(1 << 0)
+#define ZX_I2S_TIMING_SLAVE		(0 << 0)
+#define ZX_I2S_TIMING_MS_MASK		(1 << 0)
+#define ZX_I2S_TIMING_LOOP		(1 << 1)
+#define ZX_I2S_TIMING_NOR		(0 << 1)
+#define ZX_I2S_TIMING_LOOP_MASK		(1 << 1)
+#define ZX_I2S_TIMING_PTNR		(1 << 2)
+#define ZX_I2S_TIMING_NTPR		(0 << 2)
+#define ZX_I2S_TIMING_PHASE_MASK	(1 << 2)
+#define ZX_I2S_TIMING_TDM		(1 << 3)
+#define ZX_I2S_TIMING_I2S		(0 << 3)
+#define ZX_I2S_TIMING_TIMING_MASK	(1 << 3)
+#define ZX_I2S_TIMING_LONG_SYNC		(1 << 4)
+#define ZX_I2S_TIMING_SHORT_SYNC	(0 << 4)
+#define ZX_I2S_TIMING_SYNC_MASK		(1 << 4)
+#define ZX_I2S_TIMING_TEAK_EN		(1 << 5)
+#define ZX_I2S_TIMING_TEAK_DIS		(0 << 5)
+#define ZX_I2S_TIMING_TEAK_MASK		(1 << 5)
+#define ZX_I2S_TIMING_STD_I2S		(0 << 6)
+#define ZX_I2S_TIMING_MSB_JUSTIF	(1 << 6)
+#define ZX_I2S_TIMING_LSB_JUSTIF	(2 << 6)
+#define ZX_I2S_TIMING_ALIGN_MASK	(3 << 6)
+#define ZX_I2S_TIMING_CHN_MASK		(7 << 8)
+#define ZX_I2S_TIMING_CHN(x)		((x - 1) << 8)
+#define ZX_I2S_TIMING_LANE_MASK		(3 << 11)
+#define ZX_I2S_TIMING_LANE(x)		((x - 1) << 11)
+#define ZX_I2S_TIMING_TSCFG_MASK	(7 << 13)
+#define ZX_I2S_TIMING_TSCFG(x)		(x << 13)
+#define ZX_I2S_TIMING_TS_WIDTH_MASK	(0x1f << 16)
+#define ZX_I2S_TIMING_TS_WIDTH(x)	((x - 1) << 16)
+#define ZX_I2S_TIMING_DATA_SIZE_MASK	(0x1f << 21)
+#define ZX_I2S_TIMING_DATA_SIZE(x)	((x - 1) << 21)
+#define ZX_I2S_TIMING_CFG_ERR_MASK	(1 << 31)
+
+#define ZX_I2S_FIFO_CTRL_TX_RST		(1 << 0)
+#define ZX_I2S_FIFO_CTRL_TX_RST_MASK	(1 << 0)
+#define ZX_I2S_FIFO_CTRL_RX_RST		(1 << 1)
+#define ZX_I2S_FIFO_CTRL_RX_RST_MASK	(1 << 1)
+#define ZX_I2S_FIFO_CTRL_TX_DMA_EN	(1 << 4)
+#define ZX_I2S_FIFO_CTRL_TX_DMA_DIS	(0 << 4)
+#define ZX_I2S_FIFO_CTRL_TX_DMA_MASK	(1 << 4)
+#define ZX_I2S_FIFO_CTRL_RX_DMA_EN	(1 << 5)
+#define ZX_I2S_FIFO_CTRL_RX_DMA_DIS	(0 << 5)
+#define ZX_I2S_FIFO_CTRL_RX_DMA_MASK	(1 << 5)
+#define ZX_I2S_FIFO_CTRL_TX_THRES_MASK	(0x1F << 8)
+#define ZX_I2S_FIFO_CTRL_RX_THRES_MASK	(0x1F << 16)
+
+#define CLK_RAT (32 * 4)
+
+struct zx_i2s_info {
+	struct snd_dmaengine_dai_dma_data	dma_playback;
+	struct snd_dmaengine_dai_dma_data	dma_capture;
+	struct clk				*dai_clk;
+	void __iomem				*reg_base;
+	int					master;
+	resource_size_t				mapbase;
+};
+
+static void zx_i2s_tx_en(void __iomem *base, bool on)
+{
+	unsigned long val;
+
+	val = readl_relaxed(base + ZX_I2S_PROCESS_CTRL);
+	if (on)
+		val |= ZX_I2S_PROCESS_TX_EN | ZX_I2S_PROCESS_I2S_EN;
+	else
+		val &= ~(ZX_I2S_PROCESS_TX_EN | ZX_I2S_PROCESS_I2S_EN);
+	writel_relaxed(val, base + ZX_I2S_PROCESS_CTRL);
+}
+
+static void zx_i2s_rx_en(void __iomem *base, bool on)
+{
+	unsigned long val;
+
+	val = readl_relaxed(base + ZX_I2S_PROCESS_CTRL);
+	if (on)
+		val |= ZX_I2S_PROCESS_RX_EN | ZX_I2S_PROCESS_I2S_EN;
+	else
+		val &= ~(ZX_I2S_PROCESS_RX_EN | ZX_I2S_PROCESS_I2S_EN);
+	writel_relaxed(val, base + ZX_I2S_PROCESS_CTRL);
+}
+
+static void zx_i2s_tx_dma_en(void __iomem *base, bool on)
+{
+	unsigned long val;
+
+	val = readl_relaxed(base + ZX_I2S_FIFO_CTRL);
+	val |= ZX_I2S_FIFO_CTRL_TX_RST | (I2S_DEAGULT_FIFO_THRES << 8);
+	if (on)
+		val |= ZX_I2S_FIFO_CTRL_TX_DMA_EN;
+	else
+		val &= ~ZX_I2S_FIFO_CTRL_TX_DMA_EN;
+	writel_relaxed(val, base + ZX_I2S_FIFO_CTRL);
+}
+
+static void zx_i2s_rx_dma_en(void __iomem *base, bool on)
+{
+	unsigned long val;
+
+	val = readl_relaxed(base + ZX_I2S_FIFO_CTRL);
+	val |= ZX_I2S_FIFO_CTRL_RX_RST | (I2S_DEAGULT_FIFO_THRES << 16);
+	if (on)
+		val |= ZX_I2S_FIFO_CTRL_RX_DMA_EN;
+	else
+		val &= ~ZX_I2S_FIFO_CTRL_RX_DMA_EN;
+	writel_relaxed(val, base + ZX_I2S_FIFO_CTRL);
+}
+
+#define ZX_I2S_RATES \
+	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
+	 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+	 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000| \
+	 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
+
+#define ZX_I2S_FMTBIT \
+	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | \
+	SNDRV_PCM_FMTBIT_S32_LE)
+
+static int zx_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+	struct zx_i2s_info *zx_i2s = dev_get_drvdata(dai->dev);
+
+	snd_soc_dai_set_drvdata(dai, zx_i2s);
+	zx_i2s->dma_playback.addr = zx_i2s->mapbase + ZX_I2S_DATA;
+	zx_i2s->dma_playback.maxburst = 16;
+	zx_i2s->dma_capture.addr = zx_i2s->mapbase + ZX_I2S_DATA;
+	zx_i2s->dma_capture.maxburst = 16;
+	snd_soc_dai_init_dma_data(dai, &zx_i2s->dma_playback,
+				  &zx_i2s->dma_capture);
+	return 0;
+}
+
+static int zx_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	struct zx_i2s_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
+	unsigned long val;
+
+	val = readl_relaxed(i2s->reg_base + ZX_I2S_TIMING_CTRL);
+	val &= ~(ZX_I2S_TIMING_TIMING_MASK | ZX_I2S_TIMING_ALIGN_MASK |
+			ZX_I2S_TIMING_TEAK_MASK | ZX_I2S_TIMING_SYNC_MASK |
+			ZX_I2S_TIMING_MS_MASK);
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		val |= (ZX_I2S_TIMING_I2S | ZX_I2S_TIMING_STD_I2S);
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		val |= (ZX_I2S_TIMING_I2S | ZX_I2S_TIMING_MSB_JUSTIF);
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		val |= (ZX_I2S_TIMING_I2S | ZX_I2S_TIMING_LSB_JUSTIF);
+		break;
+	default:
+		dev_err(cpu_dai->dev, "Unknown i2s timeing\n");
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		i2s->master = 1;
+		val |= ZX_I2S_TIMING_MAST;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		i2s->master = 0;
+		val |= ZX_I2S_TIMING_SLAVE;
+		break;
+	default:
+		dev_err(cpu_dai->dev, "Unknown master/slave format\n");
+		return -EINVAL;
+	}
+
+	writel_relaxed(val, i2s->reg_base + ZX_I2S_TIMING_CTRL);
+	return 0;
+}
+
+static int zx_i2s_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *socdai)
+{
+	struct zx_i2s_info *i2s = snd_soc_dai_get_drvdata(socdai);
+	struct snd_dmaengine_dai_dma_data *dma_data;
+	unsigned int lane, ch_num, len, ret = 0;
+	unsigned long val, format;
+	unsigned long chn_cfg;
+
+	dma_data = snd_soc_dai_get_dma_data(socdai, substream);
+	dma_data->addr_width = params_width(params) >> 3;
+
+	val = readl_relaxed(i2s->reg_base + ZX_I2S_TIMING_CTRL);
+	val &= ~(ZX_I2S_TIMING_TS_WIDTH_MASK | ZX_I2S_TIMING_DATA_SIZE_MASK |
+		ZX_I2S_TIMING_LANE_MASK | ZX_I2S_TIMING_CHN_MASK |
+		ZX_I2S_TIMING_TSCFG_MASK);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		format = 0;
+		len = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		format = 1;
+		len = 24;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		format = 2;
+		len = 32;
+		break;
+	default:
+		dev_err(socdai->dev, "Unknown data format\n");
+		return -EINVAL;
+	}
+	val |= ZX_I2S_TIMING_TS_WIDTH(len) | ZX_I2S_TIMING_DATA_SIZE(len);
+
+	ch_num = params_channels(params);
+	switch (ch_num) {
+	case 1:
+		lane = 1;
+		chn_cfg = 2;
+		break;
+	case 2:
+	case 4:
+	case 6:
+	case 8:
+		lane = ch_num / 2;
+		chn_cfg = 3;
+		break;
+	default:
+		dev_err(socdai->dev, "Not support channel num %d\n", ch_num);
+		return -EINVAL;
+	}
+	val |= ZX_I2S_TIMING_LANE(lane);
+	val |= ZX_I2S_TIMING_TSCFG(chn_cfg);
+	val |= ZX_I2S_TIMING_CHN(ch_num);
+	writel_relaxed(val, i2s->reg_base + ZX_I2S_TIMING_CTRL);
+
+	if (i2s->master)
+		ret = clk_set_rate(i2s->dai_clk,
+				   params_rate(params) * ch_num * CLK_RAT);
+	return ret;
+}
+
+static int zx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+			  struct snd_soc_dai *dai)
+{
+	struct zx_i2s_info *zx_i2s = dev_get_drvdata(dai->dev);
+	int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		if (capture)
+			zx_i2s_rx_dma_en(zx_i2s->reg_base, true);
+		else
+			zx_i2s_tx_dma_en(zx_i2s->reg_base, true);
+	/* fall thru */
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (capture)
+			zx_i2s_rx_en(zx_i2s->reg_base, true);
+		else
+			zx_i2s_tx_en(zx_i2s->reg_base, true);
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+		if (capture)
+			zx_i2s_rx_dma_en(zx_i2s->reg_base, false);
+		else
+			zx_i2s_tx_dma_en(zx_i2s->reg_base, false);
+	/* fall thru */
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (capture)
+			zx_i2s_rx_en(zx_i2s->reg_base, false);
+		else
+			zx_i2s_tx_en(zx_i2s->reg_base, false);
+		break;
+
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int zx_i2s_startup(struct snd_pcm_substream *substream,
+			  struct snd_soc_dai *dai)
+{
+	struct zx_i2s_info *zx_i2s = dev_get_drvdata(dai->dev);
+
+	return clk_prepare_enable(zx_i2s->dai_clk);
+}
+
+static void zx_i2s_shutdown(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *dai)
+{
+	struct zx_i2s_info *zx_i2s = dev_get_drvdata(dai->dev);
+
+	clk_disable_unprepare(zx_i2s->dai_clk);
+}
+
+static struct snd_soc_dai_ops zx_i2s_dai_ops = {
+	.trigger	= zx_i2s_trigger,
+	.hw_params	= zx_i2s_hw_params,
+	.set_fmt	= zx_i2s_set_fmt,
+	.startup	= zx_i2s_startup,
+	.shutdown	= zx_i2s_shutdown,
+};
+
+static const struct snd_soc_component_driver zx_i2s_component = {
+	.name			= "zx-i2s",
+};
+
+static struct snd_soc_dai_driver zx_i2s_dai = {
+	.name	= "zx-i2s-dai",
+	.id	= 0,
+	.probe	= zx_i2s_dai_probe,
+	.playback   = {
+		.channels_min	= 1,
+		.channels_max	= 8,
+		.rates		= ZX_I2S_RATES,
+		.formats	= ZX_I2S_FMTBIT,
+	},
+	.capture = {
+		.channels_min	= 1,
+		.channels_max	= 2,
+		.rates		= ZX_I2S_RATES,
+		.formats	= ZX_I2S_FMTBIT,
+	},
+	.ops	= &zx_i2s_dai_ops,
+};
+
+static int zx_i2s_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct zx_i2s_info *zx_i2s;
+	int ret;
+
+	zx_i2s = devm_kzalloc(&pdev->dev, sizeof(*zx_i2s), GFP_KERNEL);
+	if (!zx_i2s)
+		return -ENOMEM;
+
+	zx_i2s->dai_clk = devm_clk_get(&pdev->dev, "tx");
+	if (IS_ERR(zx_i2s->dai_clk)) {
+		dev_err(&pdev->dev, "Fail to get clk\n");
+		return PTR_ERR(zx_i2s->dai_clk);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	zx_i2s->mapbase = res->start;
+	zx_i2s->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(zx_i2s->reg_base)) {
+		dev_err(&pdev->dev, "ioremap failed!\n");
+		return PTR_ERR(zx_i2s->reg_base);
+	}
+
+	writel_relaxed(0, zx_i2s->reg_base + ZX_I2S_FIFO_CTRL);
+	platform_set_drvdata(pdev, zx_i2s);
+
+	ret = devm_snd_soc_register_component(&pdev->dev, &zx_i2s_component,
+					      &zx_i2s_dai, 1);
+	if (ret) {
+		dev_err(&pdev->dev, "Register DAI failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+	if (ret)
+		dev_err(&pdev->dev, "Register platform PCM failed: %d\n", ret);
+
+	return ret;
+}
+
+static const struct of_device_id zx_i2s_dt_ids[] = {
+	{ .compatible = "zte,zx296702-i2s", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, zx_i2s_dt_ids);
+
+static struct platform_driver i2s_driver = {
+	.probe = zx_i2s_probe,
+	.driver = {
+		.name = "zx-i2s",
+		.of_match_table = zx_i2s_dt_ids,
+	},
+};
+
+module_platform_driver(i2s_driver);
+
+MODULE_AUTHOR("Jun Nie <jun.nie@linaro.org>");
+MODULE_DESCRIPTION("ZTE I2S SoC DAI");
+MODULE_LICENSE("GPL");