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-rw-r--r--sound/soc/rockchip/rockchip_i2s.c885
1 files changed, 885 insertions, 0 deletions
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
new file mode 100644
index 000000000..834fbb5cf
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -0,0 +1,885 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* sound/soc/rockchip/rockchip_i2s.c
+ *
+ * ALSA SoC Audio Layer - Rockchip I2S Controller driver
+ *
+ * Copyright (c) 2014 Rockchip Electronics Co. Ltd.
+ * Author: Jianqun <jay.xu@rock-chips.com>
+ */
+
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/delay.h>
+#include <linux/of_gpio.h>
+#include <linux/of_device.h>
+#include <linux/clk.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/spinlock.h>
+#include <sound/pcm_params.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "rockchip_i2s.h"
+
+#define DRV_NAME "rockchip-i2s"
+
+struct rk_i2s_pins {
+ u32 reg_offset;
+ u32 shift;
+};
+
+struct rk_i2s_dev {
+ struct device *dev;
+
+ struct clk *hclk;
+ struct clk *mclk;
+
+ struct snd_dmaengine_dai_dma_data capture_dma_data;
+ struct snd_dmaengine_dai_dma_data playback_dma_data;
+
+ struct regmap *regmap;
+ struct regmap *grf;
+
+ bool has_capture;
+ bool has_playback;
+
+/*
+ * Used to indicate the tx/rx status.
+ * I2S controller hopes to start the tx and rx together,
+ * also to stop them when they are both try to stop.
+*/
+ bool tx_start;
+ bool rx_start;
+ bool is_master_mode;
+ const struct rk_i2s_pins *pins;
+ unsigned int bclk_ratio;
+ spinlock_t lock; /* tx/rx lock */
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *bclk_on;
+ struct pinctrl_state *bclk_off;
+};
+
+static int i2s_pinctrl_select_bclk_on(struct rk_i2s_dev *i2s)
+{
+ int ret = 0;
+
+ if (!IS_ERR(i2s->pinctrl) && !IS_ERR_OR_NULL(i2s->bclk_on))
+ ret = pinctrl_select_state(i2s->pinctrl, i2s->bclk_on);
+
+ if (ret)
+ dev_err(i2s->dev, "bclk enable failed %d\n", ret);
+
+ return ret;
+}
+
+static int i2s_pinctrl_select_bclk_off(struct rk_i2s_dev *i2s)
+{
+
+ int ret = 0;
+
+ if (!IS_ERR(i2s->pinctrl) && !IS_ERR_OR_NULL(i2s->bclk_off))
+ ret = pinctrl_select_state(i2s->pinctrl, i2s->bclk_off);
+
+ if (ret)
+ dev_err(i2s->dev, "bclk disable failed %d\n", ret);
+
+ return ret;
+}
+
+static int i2s_runtime_suspend(struct device *dev)
+{
+ struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
+
+ regcache_cache_only(i2s->regmap, true);
+ clk_disable_unprepare(i2s->mclk);
+
+ return 0;
+}
+
+static int i2s_runtime_resume(struct device *dev)
+{
+ struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(i2s->mclk);
+ if (ret) {
+ dev_err(i2s->dev, "clock enable failed %d\n", ret);
+ return ret;
+ }
+
+ regcache_cache_only(i2s->regmap, false);
+ regcache_mark_dirty(i2s->regmap);
+
+ ret = regcache_sync(i2s->regmap);
+ if (ret)
+ clk_disable_unprepare(i2s->mclk);
+
+ return ret;
+}
+
+static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
+{
+ return snd_soc_dai_get_drvdata(dai);
+}
+
+static int rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
+{
+ unsigned int val = 0;
+ int ret = 0;
+
+ spin_lock(&i2s->lock);
+ if (on) {
+ ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
+ I2S_DMACR_TDE_ENABLE,
+ I2S_DMACR_TDE_ENABLE);
+ if (ret < 0)
+ goto end;
+ ret = regmap_update_bits(i2s->regmap, I2S_XFER,
+ I2S_XFER_TXS_START | I2S_XFER_RXS_START,
+ I2S_XFER_TXS_START | I2S_XFER_RXS_START);
+ if (ret < 0)
+ goto end;
+ i2s->tx_start = true;
+ } else {
+ i2s->tx_start = false;
+
+ ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
+ I2S_DMACR_TDE_ENABLE,
+ I2S_DMACR_TDE_DISABLE);
+ if (ret < 0)
+ goto end;
+
+ if (!i2s->rx_start) {
+ ret = regmap_update_bits(i2s->regmap, I2S_XFER,
+ I2S_XFER_TXS_START | I2S_XFER_RXS_START,
+ I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
+ if (ret < 0)
+ goto end;
+ udelay(150);
+ ret = regmap_update_bits(i2s->regmap, I2S_CLR,
+ I2S_CLR_TXC | I2S_CLR_RXC,
+ I2S_CLR_TXC | I2S_CLR_RXC);
+ if (ret < 0)
+ goto end;
+ ret = regmap_read_poll_timeout_atomic(i2s->regmap,
+ I2S_CLR,
+ val,
+ val == 0,
+ 20,
+ 200);
+ if (ret < 0)
+ dev_warn(i2s->dev, "fail to clear: %d\n", ret);
+ }
+ }
+end:
+ spin_unlock(&i2s->lock);
+ if (ret < 0)
+ dev_err(i2s->dev, "lrclk update failed\n");
+
+ return ret;
+}
+
+static int rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
+{
+ unsigned int val = 0;
+ int ret = 0;
+
+ spin_lock(&i2s->lock);
+ if (on) {
+ ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
+ I2S_DMACR_RDE_ENABLE,
+ I2S_DMACR_RDE_ENABLE);
+ if (ret < 0)
+ goto end;
+
+ ret = regmap_update_bits(i2s->regmap, I2S_XFER,
+ I2S_XFER_TXS_START | I2S_XFER_RXS_START,
+ I2S_XFER_TXS_START | I2S_XFER_RXS_START);
+ if (ret < 0)
+ goto end;
+ i2s->rx_start = true;
+ } else {
+ i2s->rx_start = false;
+
+ ret = regmap_update_bits(i2s->regmap, I2S_DMACR,
+ I2S_DMACR_RDE_ENABLE,
+ I2S_DMACR_RDE_DISABLE);
+ if (ret < 0)
+ goto end;
+
+ if (!i2s->tx_start) {
+ ret = regmap_update_bits(i2s->regmap, I2S_XFER,
+ I2S_XFER_TXS_START | I2S_XFER_RXS_START,
+ I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
+ if (ret < 0)
+ goto end;
+ udelay(150);
+ ret = regmap_update_bits(i2s->regmap, I2S_CLR,
+ I2S_CLR_TXC | I2S_CLR_RXC,
+ I2S_CLR_TXC | I2S_CLR_RXC);
+ if (ret < 0)
+ goto end;
+ ret = regmap_read_poll_timeout_atomic(i2s->regmap,
+ I2S_CLR,
+ val,
+ val == 0,
+ 20,
+ 200);
+ if (ret < 0)
+ dev_warn(i2s->dev, "fail to clear: %d\n", ret);
+ }
+ }
+end:
+ spin_unlock(&i2s->lock);
+ if (ret < 0)
+ dev_err(i2s->dev, "lrclk update failed\n");
+
+ return ret;
+}
+
+static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
+ unsigned int fmt)
+{
+ struct rk_i2s_dev *i2s = to_info(cpu_dai);
+ unsigned int mask = 0, val = 0;
+ int ret = 0;
+
+ pm_runtime_get_sync(cpu_dai->dev);
+ mask = I2S_CKR_MSS_MASK;
+ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
+ /* Set source clock in Master mode */
+ val = I2S_CKR_MSS_MASTER;
+ i2s->is_master_mode = true;
+ break;
+ case SND_SOC_DAIFMT_BC_FC:
+ val = I2S_CKR_MSS_SLAVE;
+ i2s->is_master_mode = false;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_pm_put;
+ }
+
+ regmap_update_bits(i2s->regmap, I2S_CKR, mask, val);
+
+ mask = I2S_CKR_CKP_MASK | I2S_CKR_TLP_MASK | I2S_CKR_RLP_MASK;
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ val = I2S_CKR_CKP_NORMAL |
+ I2S_CKR_TLP_NORMAL |
+ I2S_CKR_RLP_NORMAL;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ val = I2S_CKR_CKP_NORMAL |
+ I2S_CKR_TLP_INVERTED |
+ I2S_CKR_RLP_INVERTED;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ val = I2S_CKR_CKP_INVERTED |
+ I2S_CKR_TLP_NORMAL |
+ I2S_CKR_RLP_NORMAL;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ val = I2S_CKR_CKP_INVERTED |
+ I2S_CKR_TLP_INVERTED |
+ I2S_CKR_RLP_INVERTED;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_pm_put;
+ }
+
+ regmap_update_bits(i2s->regmap, I2S_CKR, mask, val);
+
+ mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_RIGHT_J:
+ val = I2S_TXCR_IBM_RSJM;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ val = I2S_TXCR_IBM_LSJM;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ val = I2S_TXCR_IBM_NORMAL;
+ break;
+ case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 bit mode */
+ val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1);
+ break;
+ case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
+ val = I2S_TXCR_TFS_PCM;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_pm_put;
+ }
+
+ regmap_update_bits(i2s->regmap, I2S_TXCR, mask, val);
+
+ mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_RIGHT_J:
+ val = I2S_RXCR_IBM_RSJM;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ val = I2S_RXCR_IBM_LSJM;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ val = I2S_RXCR_IBM_NORMAL;
+ break;
+ case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 bit mode */
+ val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1);
+ break;
+ case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
+ val = I2S_RXCR_TFS_PCM;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_pm_put;
+ }
+
+ regmap_update_bits(i2s->regmap, I2S_RXCR, mask, val);
+
+err_pm_put:
+ pm_runtime_put(cpu_dai->dev);
+
+ return ret;
+}
+
+static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct rk_i2s_dev *i2s = to_info(dai);
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ unsigned int val = 0;
+ unsigned int mclk_rate, bclk_rate, div_bclk, div_lrck;
+
+ if (i2s->is_master_mode) {
+ mclk_rate = clk_get_rate(i2s->mclk);
+ bclk_rate = i2s->bclk_ratio * params_rate(params);
+ if (!bclk_rate)
+ return -EINVAL;
+
+ div_bclk = DIV_ROUND_CLOSEST(mclk_rate, bclk_rate);
+ div_lrck = bclk_rate / params_rate(params);
+ regmap_update_bits(i2s->regmap, I2S_CKR,
+ I2S_CKR_MDIV_MASK,
+ I2S_CKR_MDIV(div_bclk));
+
+ regmap_update_bits(i2s->regmap, I2S_CKR,
+ I2S_CKR_TSD_MASK |
+ I2S_CKR_RSD_MASK,
+ I2S_CKR_TSD(div_lrck) |
+ I2S_CKR_RSD(div_lrck));
+ }
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ val |= I2S_TXCR_VDW(8);
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ val |= I2S_TXCR_VDW(16);
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ val |= I2S_TXCR_VDW(20);
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ val |= I2S_TXCR_VDW(24);
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ val |= I2S_TXCR_VDW(32);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (params_channels(params)) {
+ case 8:
+ val |= I2S_CHN_8;
+ break;
+ case 6:
+ val |= I2S_CHN_6;
+ break;
+ case 4:
+ val |= I2S_CHN_4;
+ break;
+ case 2:
+ val |= I2S_CHN_2;
+ break;
+ default:
+ dev_err(i2s->dev, "invalid channel: %d\n",
+ params_channels(params));
+ return -EINVAL;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ regmap_update_bits(i2s->regmap, I2S_RXCR,
+ I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
+ val);
+ else
+ regmap_update_bits(i2s->regmap, I2S_TXCR,
+ I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
+ val);
+
+ if (!IS_ERR(i2s->grf) && i2s->pins) {
+ regmap_read(i2s->regmap, I2S_TXCR, &val);
+ val &= I2S_TXCR_CSR_MASK;
+
+ switch (val) {
+ case I2S_CHN_4:
+ val = I2S_IO_4CH_OUT_6CH_IN;
+ break;
+ case I2S_CHN_6:
+ val = I2S_IO_6CH_OUT_4CH_IN;
+ break;
+ case I2S_CHN_8:
+ val = I2S_IO_8CH_OUT_2CH_IN;
+ break;
+ default:
+ val = I2S_IO_2CH_OUT_8CH_IN;
+ break;
+ }
+
+ val <<= i2s->pins->shift;
+ val |= (I2S_IO_DIRECTION_MASK << i2s->pins->shift) << 16;
+ regmap_write(i2s->grf, i2s->pins->reg_offset, val);
+ }
+
+ regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
+ I2S_DMACR_TDL(16));
+ regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
+ I2S_DMACR_RDL(16));
+
+ val = I2S_CKR_TRCM_TXRX;
+ if (dai->driver->symmetric_rate && rtd->dai_link->symmetric_rate)
+ val = I2S_CKR_TRCM_TXONLY;
+
+ regmap_update_bits(i2s->regmap, I2S_CKR,
+ I2S_CKR_TRCM_MASK,
+ val);
+ return 0;
+}
+
+static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct rk_i2s_dev *i2s = to_info(dai);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ ret = rockchip_snd_rxctrl(i2s, 1);
+ else
+ ret = rockchip_snd_txctrl(i2s, 1);
+ if (ret < 0)
+ return ret;
+ i2s_pinctrl_select_bclk_on(i2s);
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ if (!i2s->tx_start)
+ i2s_pinctrl_select_bclk_off(i2s);
+ ret = rockchip_snd_rxctrl(i2s, 0);
+ } else {
+ if (!i2s->rx_start)
+ i2s_pinctrl_select_bclk_off(i2s);
+ ret = rockchip_snd_txctrl(i2s, 0);
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int rockchip_i2s_set_bclk_ratio(struct snd_soc_dai *dai,
+ unsigned int ratio)
+{
+ struct rk_i2s_dev *i2s = to_info(dai);
+
+ i2s->bclk_ratio = ratio;
+
+ return 0;
+}
+
+static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct rk_i2s_dev *i2s = to_info(cpu_dai);
+ int ret;
+
+ if (freq == 0)
+ return 0;
+
+ ret = clk_set_rate(i2s->mclk, freq);
+ if (ret)
+ dev_err(i2s->dev, "Fail to set mclk %d\n", ret);
+
+ return ret;
+}
+
+static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+ struct rk_i2s_dev *i2s = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai,
+ i2s->has_playback ? &i2s->playback_dma_data : NULL,
+ i2s->has_capture ? &i2s->capture_dma_data : NULL);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
+ .probe = rockchip_i2s_dai_probe,
+ .hw_params = rockchip_i2s_hw_params,
+ .set_bclk_ratio = rockchip_i2s_set_bclk_ratio,
+ .set_sysclk = rockchip_i2s_set_sysclk,
+ .set_fmt = rockchip_i2s_set_fmt,
+ .trigger = rockchip_i2s_trigger,
+};
+
+static struct snd_soc_dai_driver rockchip_i2s_dai = {
+ .ops = &rockchip_i2s_dai_ops,
+ .symmetric_rate = 1,
+};
+
+static const struct snd_soc_component_driver rockchip_i2s_component = {
+ .name = DRV_NAME,
+ .legacy_dai_naming = 1,
+};
+
+static bool rockchip_i2s_wr_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case I2S_TXCR:
+ case I2S_RXCR:
+ case I2S_CKR:
+ case I2S_DMACR:
+ case I2S_INTCR:
+ case I2S_XFER:
+ case I2S_CLR:
+ case I2S_TXDR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rockchip_i2s_rd_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case I2S_TXCR:
+ case I2S_RXCR:
+ case I2S_CKR:
+ case I2S_DMACR:
+ case I2S_INTCR:
+ case I2S_XFER:
+ case I2S_CLR:
+ case I2S_TXDR:
+ case I2S_RXDR:
+ case I2S_FIFOLR:
+ case I2S_INTSR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rockchip_i2s_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case I2S_INTSR:
+ case I2S_CLR:
+ case I2S_FIFOLR:
+ case I2S_TXDR:
+ case I2S_RXDR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool rockchip_i2s_precious_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case I2S_RXDR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct reg_default rockchip_i2s_reg_defaults[] = {
+ {0x00, 0x0000000f},
+ {0x04, 0x0000000f},
+ {0x08, 0x00071f1f},
+ {0x10, 0x001f0000},
+ {0x14, 0x01f00000},
+};
+
+static const struct regmap_config rockchip_i2s_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = I2S_RXDR,
+ .reg_defaults = rockchip_i2s_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(rockchip_i2s_reg_defaults),
+ .writeable_reg = rockchip_i2s_wr_reg,
+ .readable_reg = rockchip_i2s_rd_reg,
+ .volatile_reg = rockchip_i2s_volatile_reg,
+ .precious_reg = rockchip_i2s_precious_reg,
+ .cache_type = REGCACHE_FLAT,
+};
+
+static const struct rk_i2s_pins rk3399_i2s_pins = {
+ .reg_offset = 0xe220,
+ .shift = 11,
+};
+
+static const struct of_device_id rockchip_i2s_match[] __maybe_unused = {
+ { .compatible = "rockchip,px30-i2s", },
+ { .compatible = "rockchip,rk1808-i2s", },
+ { .compatible = "rockchip,rk3036-i2s", },
+ { .compatible = "rockchip,rk3066-i2s", },
+ { .compatible = "rockchip,rk3128-i2s", },
+ { .compatible = "rockchip,rk3188-i2s", },
+ { .compatible = "rockchip,rk3228-i2s", },
+ { .compatible = "rockchip,rk3288-i2s", },
+ { .compatible = "rockchip,rk3308-i2s", },
+ { .compatible = "rockchip,rk3328-i2s", },
+ { .compatible = "rockchip,rk3366-i2s", },
+ { .compatible = "rockchip,rk3368-i2s", },
+ { .compatible = "rockchip,rk3399-i2s", .data = &rk3399_i2s_pins },
+ { .compatible = "rockchip,rk3588-i2s", },
+ { .compatible = "rockchip,rv1126-i2s", },
+ {},
+};
+
+static int rockchip_i2s_init_dai(struct rk_i2s_dev *i2s, struct resource *res,
+ struct snd_soc_dai_driver **dp)
+{
+ struct device_node *node = i2s->dev->of_node;
+ struct snd_soc_dai_driver *dai;
+ struct property *dma_names;
+ const char *dma_name;
+ unsigned int val;
+
+ of_property_for_each_string(node, "dma-names", dma_names, dma_name) {
+ if (!strcmp(dma_name, "tx"))
+ i2s->has_playback = true;
+ if (!strcmp(dma_name, "rx"))
+ i2s->has_capture = true;
+ }
+
+ dai = devm_kmemdup(i2s->dev, &rockchip_i2s_dai,
+ sizeof(*dai), GFP_KERNEL);
+ if (!dai)
+ return -ENOMEM;
+
+ if (i2s->has_playback) {
+ dai->playback.stream_name = "Playback";
+ dai->playback.channels_min = 2;
+ dai->playback.channels_max = 8;
+ dai->playback.rates = SNDRV_PCM_RATE_8000_192000;
+ dai->playback.formats = SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S20_3LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE;
+
+ i2s->playback_dma_data.addr = res->start + I2S_TXDR;
+ i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ i2s->playback_dma_data.maxburst = 8;
+
+ if (!of_property_read_u32(node, "rockchip,playback-channels", &val)) {
+ if (val >= 2 && val <= 8)
+ dai->playback.channels_max = val;
+ }
+ }
+
+ if (i2s->has_capture) {
+ dai->capture.stream_name = "Capture";
+ dai->capture.channels_min = 2;
+ dai->capture.channels_max = 8;
+ dai->capture.rates = SNDRV_PCM_RATE_8000_192000;
+ dai->capture.formats = SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S20_3LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE;
+
+ i2s->capture_dma_data.addr = res->start + I2S_RXDR;
+ i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ i2s->capture_dma_data.maxburst = 8;
+
+ if (!of_property_read_u32(node, "rockchip,capture-channels", &val)) {
+ if (val >= 2 && val <= 8)
+ dai->capture.channels_max = val;
+ }
+ }
+
+ if (dp)
+ *dp = dai;
+
+ return 0;
+}
+
+static int rockchip_i2s_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ const struct of_device_id *of_id;
+ struct rk_i2s_dev *i2s;
+ struct snd_soc_dai_driver *dai;
+ struct resource *res;
+ void __iomem *regs;
+ int ret;
+
+ i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
+ if (!i2s)
+ return -ENOMEM;
+
+ spin_lock_init(&i2s->lock);
+ i2s->dev = &pdev->dev;
+
+ i2s->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf");
+ if (!IS_ERR(i2s->grf)) {
+ of_id = of_match_device(rockchip_i2s_match, &pdev->dev);
+ if (!of_id || !of_id->data)
+ return -EINVAL;
+
+ i2s->pins = of_id->data;
+ }
+
+ /* try to prepare related clocks */
+ i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk");
+ if (IS_ERR(i2s->hclk)) {
+ dev_err(&pdev->dev, "Can't retrieve i2s bus clock\n");
+ return PTR_ERR(i2s->hclk);
+ }
+ ret = clk_prepare_enable(i2s->hclk);
+ if (ret) {
+ dev_err(i2s->dev, "hclock enable failed %d\n", ret);
+ return ret;
+ }
+
+ i2s->mclk = devm_clk_get(&pdev->dev, "i2s_clk");
+ if (IS_ERR(i2s->mclk)) {
+ dev_err(&pdev->dev, "Can't retrieve i2s master clock\n");
+ ret = PTR_ERR(i2s->mclk);
+ goto err_clk;
+ }
+
+ regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(regs)) {
+ ret = PTR_ERR(regs);
+ goto err_clk;
+ }
+
+ i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+ &rockchip_i2s_regmap_config);
+ if (IS_ERR(i2s->regmap)) {
+ dev_err(&pdev->dev,
+ "Failed to initialise managed register map\n");
+ ret = PTR_ERR(i2s->regmap);
+ goto err_clk;
+ }
+
+ i2s->bclk_ratio = 64;
+ i2s->pinctrl = devm_pinctrl_get(&pdev->dev);
+ if (!IS_ERR(i2s->pinctrl)) {
+ i2s->bclk_on = pinctrl_lookup_state(i2s->pinctrl, "bclk_on");
+ if (!IS_ERR_OR_NULL(i2s->bclk_on)) {
+ i2s->bclk_off = pinctrl_lookup_state(i2s->pinctrl, "bclk_off");
+ if (IS_ERR_OR_NULL(i2s->bclk_off)) {
+ dev_err(&pdev->dev, "failed to find i2s bclk_off\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+ }
+ } else {
+ dev_dbg(&pdev->dev, "failed to find i2s pinctrl\n");
+ }
+
+ i2s_pinctrl_select_bclk_off(i2s);
+
+ dev_set_drvdata(&pdev->dev, i2s);
+
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ ret = i2s_runtime_resume(&pdev->dev);
+ if (ret)
+ goto err_pm_disable;
+ }
+
+ ret = rockchip_i2s_init_dai(i2s, res, &dai);
+ if (ret)
+ goto err_pm_disable;
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &rockchip_i2s_component,
+ dai, 1);
+
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register DAI\n");
+ goto err_suspend;
+ }
+
+ ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register PCM\n");
+ goto err_suspend;
+ }
+
+ return 0;
+
+err_suspend:
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ i2s_runtime_suspend(&pdev->dev);
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+err_clk:
+ clk_disable_unprepare(i2s->hclk);
+ return ret;
+}
+
+static void rockchip_i2s_remove(struct platform_device *pdev)
+{
+ struct rk_i2s_dev *i2s = dev_get_drvdata(&pdev->dev);
+
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ i2s_runtime_suspend(&pdev->dev);
+
+ clk_disable_unprepare(i2s->hclk);
+}
+
+static const struct dev_pm_ops rockchip_i2s_pm_ops = {
+ SET_RUNTIME_PM_OPS(i2s_runtime_suspend, i2s_runtime_resume,
+ NULL)
+};
+
+static struct platform_driver rockchip_i2s_driver = {
+ .probe = rockchip_i2s_probe,
+ .remove_new = rockchip_i2s_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = of_match_ptr(rockchip_i2s_match),
+ .pm = &rockchip_i2s_pm_ops,
+ },
+};
+module_platform_driver(rockchip_i2s_driver);
+
+MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface");
+MODULE_AUTHOR("jianqun <jay.xu@rock-chips.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, rockchip_i2s_match);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 19:43:10 +0000