From c813586d191367502115a0ead75c3e52b3d0f96b Mon Sep 17 00:00:00 2001 From: Xingyu Wu Date: Tue, 11 Oct 2022 10:19:27 +0800 Subject: [PATCH] sound:starfive:Add I2S driver Add I2S driver for starfive. Signed-off-by: Xingyu Wu --- sound/soc/starfive/Kconfig | 8 + sound/soc/starfive/Makefile | 2 + sound/soc/starfive/starfive_i2s.c | 908 ++++++++++++++++++++++++++++++++++++++ sound/soc/starfive/starfive_i2s.h | 153 +++++++ 4 files changed, 1071 insertions(+) mode change 100755 => 100644 sound/soc/starfive/Kconfig mode change 100755 => 100644 sound/soc/starfive/Makefile create mode 100644 sound/soc/starfive/starfive_i2s.c create mode 100644 sound/soc/starfive/starfive_i2s.h diff --git a/sound/soc/starfive/Kconfig b/sound/soc/starfive/Kconfig old mode 100755 new mode 100644 index cbeae68..b839ee8 --- a/sound/soc/starfive/Kconfig +++ b/sound/soc/starfive/Kconfig @@ -29,6 +29,14 @@ config SND_SOC_STARFIVE_I2S_MASTER Say 'Y' or 'M' here if you are building for StarFive SoCs platforms that contain i2srx_3ch controller core. +config SND_SOC_STARFIVE_I2S + tristate "Starfive I2S module" + depends on HAVE_CLK && SND_SOC_STARFIVE + select SND_SOC_GENERIC_DMAENGINE_PCM + help + Say 'Y' or 'M' here if you are building for StarFive SoCs + platforms that contain i2s controller core like i2stx_4ch0. + config SND_SOC_STARFIVE_PDM tristate "Starfive PDM module" depends on HAVE_CLK && SND_SOC_STARFIVE diff --git a/sound/soc/starfive/Makefile b/sound/soc/starfive/Makefile old mode 100755 new mode 100644 index 8cef7c6..2709d34 --- a/sound/soc/starfive/Makefile +++ b/sound/soc/starfive/Makefile @@ -12,3 +12,5 @@ obj-$(CONFIG_SND_SOC_STARFIVE_TDM) += starfive_tdm.o obj-$(CONFIG_SND_SOC_STARFIVE_SPDIF) += spdif.o spdif-y := starfive_spdif.o spdif-$(CONFIG_SND_SOC_STARFIVE_SPDIF_PCM) += starfive_spdif_pcm.o + +obj-$(CONFIG_SND_SOC_STARFIVE_I2S) += starfive_i2s.o diff --git a/sound/soc/starfive/starfive_i2s.c b/sound/soc/starfive/starfive_i2s.c new file mode 100644 index 0000000..28c749c --- /dev/null +++ b/sound/soc/starfive/starfive_i2s.c @@ -0,0 +1,908 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ALSA SoC Synopsys I2S Audio Layer + * + * sound/soc/dwc/designware_i2s.c + * + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "starfive_i2s.h" + +static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val) +{ + writel(val, io_base + reg); +} + +static inline u32 i2s_read_reg(void __iomem *io_base, int reg) +{ + return readl(io_base + reg); +} + +static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream) +{ + u32 i = 0; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < 4; i++) + i2s_write_reg(dev->i2s_base, TER(i), 0); + } else { + for (i = 0; i < 4; i++) + i2s_write_reg(dev->i2s_base, RER(i), 0); + } +} + +static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream) +{ + u32 i = 0; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < 4; i++) + i2s_read_reg(dev->i2s_base, TOR(i)); + } else { + for (i = 0; i < 4; i++) + i2s_read_reg(dev->i2s_base, ROR(i)); + } +} + +static inline void i2s_disable_irqs(struct dw_i2s_dev *dev, u32 stream, + int chan_nr) +{ + u32 i, irq; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); + } + } else { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); + } + } +} + +static inline void i2s_enable_irqs(struct dw_i2s_dev *dev, u32 stream, + int chan_nr) +{ + u32 i, irq; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30); + } + } else { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03); + } + } +} + +static irqreturn_t i2s_irq_handler(int irq, void *dev_id) +{ + struct dw_i2s_dev *dev = dev_id; + bool irq_valid = false; + u32 isr[4]; + int i; + + for (i = 0; i < 4; i++) + isr[i] = i2s_read_reg(dev->i2s_base, ISR(i)); + + i2s_clear_irqs(dev, SNDRV_PCM_STREAM_PLAYBACK); + i2s_clear_irqs(dev, SNDRV_PCM_STREAM_CAPTURE); + + for (i = 0; i < 4; i++) { + /* + * Check if TX fifo is empty. If empty fill FIFO with samples + * NOTE: Only two channels supported + */ + if ((isr[i] & ISR_TXFE) && (i == 0) && dev->use_pio) { + dw_pcm_push_tx(dev); + irq_valid = true; + } + + /* + * Data available. Retrieve samples from FIFO + * NOTE: Only two channels supported + */ + if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) { + dw_pcm_pop_rx(dev); + irq_valid = true; + } + + /* Error Handling: TX */ + if (isr[i] & ISR_TXFO) { + dev_err(dev->dev, "TX overrun (ch_id=%d)\n", i); + irq_valid = true; + } + + /* Error Handling: TX */ + if (isr[i] & ISR_RXFO) { + dev_err(dev->dev, "RX overrun (ch_id=%d)\n", i); + irq_valid = true; + } + } + + if (irq_valid) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + +static void i2s_start(struct dw_i2s_dev *dev, + struct snd_pcm_substream *substream) +{ + struct i2s_clk_config_data *config = &dev->config; + + i2s_write_reg(dev->i2s_base, IER, 1); + i2s_enable_irqs(dev, substream->stream, config->chan_nr); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, ITER, 1); + else + i2s_write_reg(dev->i2s_base, IRER, 1); + + i2s_write_reg(dev->i2s_base, CER, 1); + +} + +static void i2s_stop(struct dw_i2s_dev *dev, + struct snd_pcm_substream *substream) +{ + i2s_clear_irqs(dev, substream->stream); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, ITER, 0); + else + i2s_write_reg(dev->i2s_base, IRER, 0); + + i2s_disable_irqs(dev, substream->stream, 8); + + if (!dev->active) { + i2s_write_reg(dev->i2s_base, CER, 0); + i2s_write_reg(dev->i2s_base, IER, 0); + } +} + +static void dw_i2s_config(struct dw_i2s_dev *dev, int stream) +{ + u32 ch_reg; + struct i2s_clk_config_data *config = &dev->config; + + i2s_disable_channels(dev, stream); + + for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) { + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + i2s_write_reg(dev->i2s_base, TCR(ch_reg), + dev->xfer_resolution); + i2s_write_reg(dev->i2s_base, TFCR(ch_reg), + dev->fifo_th - 1); + i2s_write_reg(dev->i2s_base, TER(ch_reg), 1); + } else { + i2s_write_reg(dev->i2s_base, RCR(ch_reg), + dev->xfer_resolution); + i2s_write_reg(dev->i2s_base, RFCR(ch_reg), + dev->fifo_th - 1); + i2s_write_reg(dev->i2s_base, RER(ch_reg), 1); + } + } +} + +static int dw_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + struct i2s_clk_config_data *config = &dev->config; + int ret; + unsigned int bclk_rate; + union dw_i2s_snd_dma_data *dma_data = NULL; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_dai_link *dai_link = rtd->dai_link; + + dai_link->stop_dma_first = 1; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + config->data_width = 16; + dev->ccr = 0x00; + dev->xfer_resolution = 0x02; + dev->play_dma_data.dt.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + break; + + case SNDRV_PCM_FORMAT_S32_LE: + config->data_width = 32; + dev->ccr = 0x10; + dev->xfer_resolution = 0x05; + dev->play_dma_data.dt.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + break; + + default: + dev_err(dev->dev, "designware-i2s: unsupported PCM fmt"); + return -EINVAL; + } + + switch (params_rate(params)) { + case 32000: + bclk_rate = 2048000; + break; + case 48000: + bclk_rate = 3072000; + break; + default: + dev_err(dai->dev, "%d rate not supported\n", + params_rate(params)); + return -EINVAL; + } + + config->chan_nr = params_channels(params); + + switch (config->chan_nr) { + case EIGHT_CHANNEL_SUPPORT: + case SIX_CHANNEL_SUPPORT: + case FOUR_CHANNEL_SUPPORT: + case TWO_CHANNEL_SUPPORT: + break; + default: + dev_err(dev->dev, "channel not supported\n"); + return -EINVAL; + } + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) + dma_data = &dev->capture_dma_data; + else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + dma_data = &dev->play_dma_data; + snd_soc_dai_set_dma_data(dai, substream, (void *)dma_data); + + dw_i2s_config(dev, substream->stream); + + i2s_write_reg(dev->i2s_base, CCR, dev->ccr); + + config->sample_rate = params_rate(params); + + if (dev->capability & DW_I2S_MASTER) { + if (dev->i2s_clk_cfg) { + ret = dev->i2s_clk_cfg(config); + if (ret < 0) { + dev_err(dev->dev, "runtime audio clk config fail\n"); + goto err_return; + } + } else { + ret = clk_set_parent(dev->clk_mclk, dev->clk_mclk_ext); + if (ret) { + dev_err(dev->dev, "failed to set mclk parent to mclk_ext\n"); + goto err_return; + } + + ret = clk_set_rate(dev->clk_i2s_bclk_mst, bclk_rate); + if (ret) { + dev_err(dev->dev, "Can't set i2s bclk: %d\n", ret); + goto err_return; + } + + dev_dbg(dev->dev, "get rate mclk: %ld\n", + clk_get_rate(dev->clk_mclk)); + dev_dbg(dev->dev, "get rate bclk:%ld\n", + clk_get_rate(dev->clk_i2s_bclk)); + dev_dbg(dev->dev, "get rate lrck:%ld\n", + clk_get_rate(dev->clk_i2s_lrck)); + } + } + return 0; + +err_return: + return ret; +} + +static int dw_i2s_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, TXFFR, 1); + else + i2s_write_reg(dev->i2s_base, RXFFR, 1); + + return 0; +} + +static int dw_i2s_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dev->active++; + i2s_start(dev, substream); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dev->active--; + i2s_stop(dev, substream); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); + int ret = 0; + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + if (dev->capability & DW_I2S_SLAVE) + ret = 0; + else + ret = -EINVAL; + break; + case SND_SOC_DAIFMT_CBS_CFS: + if (dev->capability & DW_I2S_MASTER) + ret = 0; + else + ret = -EINVAL; + break; + case SND_SOC_DAIFMT_CBM_CFS: + case SND_SOC_DAIFMT_CBS_CFM: + ret = -EINVAL; + break; + default: + dev_dbg(dev->dev, "dwc : Invalid master/slave format\n"); + ret = -EINVAL; + break; + } + return ret; +} + +static const struct snd_soc_dai_ops dw_i2s_dai_ops = { + .hw_params = dw_i2s_hw_params, + .prepare = dw_i2s_prepare, + .trigger = dw_i2s_trigger, + .set_fmt = dw_i2s_set_fmt, +}; + +#ifdef CONFIG_PM +static int dw_i2s_runtime_suspend(struct device *dev) +{ + struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); + + if (dw_dev->capability & DW_I2S_MASTER) { + clk_disable_unprepare(dw_dev->clk_i2s_lrck); + clk_disable_unprepare(dw_dev->clk_i2s_bclk); + } + + return 0; +} + +static int dw_i2s_runtime_resume(struct device *dev) +{ + struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); + int ret; + + if (dw_dev->capability & DW_I2S_MASTER) { + ret = clk_prepare_enable(dw_dev->clk_i2s_bclk); + if (ret) { + dev_err(dw_dev->dev, "Failed to enable clk_i2s_bclk\n"); + return ret; + } + + ret = clk_prepare_enable(dw_dev->clk_i2s_lrck); + if (ret) { + dev_err(dw_dev->dev, "Failed to enable clk_i2s_lrck\n"); + return ret; + } + } + + return 0; +} + +static int dw_i2s_suspend(struct snd_soc_component *component) +{ + struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); + + if (dev->capability & DW_I2S_MASTER) { + clk_disable_unprepare(dev->clk_i2s_lrck); + clk_disable_unprepare(dev->clk_i2s_bclk); + } + + return 0; +} + +static int dw_i2s_resume(struct snd_soc_component *component) +{ + struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); + struct snd_soc_dai *dai; + int stream; + int ret; + + if (dev->capability & DW_I2S_MASTER) { + ret = clk_prepare_enable(dev->clk_i2s_bclk); + if (ret) { + dev_err(dev->dev, "Failed to enable clk_i2s_bclk\n"); + return ret; + } + + ret = clk_prepare_enable(dev->clk_i2s_lrck); + if (ret) { + dev_err(dev->dev, "Failed to enable clk_i2s_lrck\n"); + return ret; + } + } + + for_each_component_dais(component, dai) { + for_each_pcm_streams(stream) + if (snd_soc_dai_stream_active(dai, stream)) + dw_i2s_config(dev, stream); + } + + return 0; +} + +#else +#define dw_i2s_suspend NULL +#define dw_i2s_resume NULL +#endif + +static const struct snd_soc_component_driver dw_i2s_component = { + .name = "dw-i2s", + .suspend = dw_i2s_suspend, + .resume = dw_i2s_resume, +}; + +static int dw_i2stx_4ch0_clk_init(struct platform_device *pdev, struct dw_i2s_dev *dev) +{ + int ret = 0; + + static struct clk_bulk_data clks[] = { + { .id = "bclk-mst" }, + { .id = "lrck-mst" }, + { .id = "mclk" }, + { .id = "bclk0" }, + { .id = "lrck0" }, + { .id = "i2s_apb" }, + { .id = "mclk_ext" }, + }; + + ret = devm_clk_bulk_get(&pdev->dev, ARRAY_SIZE(clks), clks); + if (ret) { + dev_err(&pdev->dev, "%s: failed to get i2s clocks\n", __func__); + goto exit; + } + + dev->clk_i2s_bclk_mst = clks[0].clk; + dev->clk_i2s_lrck_mst = clks[1].clk; + dev->clk_mclk = clks[2].clk; + dev->clk_i2s_bclk = clks[3].clk; + dev->clk_i2s_lrck = clks[4].clk; + dev->clk_i2s_apb = clks[5].clk; + dev->clk_mclk_ext = clks[6].clk; + + dev->rst_i2s_apb = devm_reset_control_get_exclusive(&pdev->dev, "rst_apb"); + if (IS_ERR(dev->rst_i2s_apb)) { + dev_err(&pdev->dev, "failed to get i2s apb reset control\n"); + ret = PTR_ERR(dev->rst_i2s_apb); + goto exit; + } + + dev->rst_i2s_bclk = devm_reset_control_get_exclusive(&pdev->dev, "rst_bclk"); + if (IS_ERR(dev->rst_i2s_bclk)) { + dev_err(&pdev->dev, "failed to get i2s bclk reset control\n"); + ret = PTR_ERR(dev->rst_i2s_bclk); + goto exit; + } + + ret = clk_prepare_enable(dev->clk_i2s_apb); + if (ret) { + dev_err(&pdev->dev, "failed to prepare enable clk_i2s_apb\n"); + goto exit; + } + + ret = clk_set_parent(dev->clk_mclk, dev->clk_mclk_ext); + if (ret) { + dev_err(&pdev->dev, "failed to set mclk parent to mclk_ext\n"); + goto err_set_parent; + } + + ret = clk_prepare_enable(dev->clk_i2s_bclk_mst); + if (ret) { + dev_err(&pdev->dev, "failed to prepare enable clk_i2srx_3ch_bclk_mst\n"); + goto err_dis_bclk_mst; + } + + ret = clk_set_parent(dev->clk_i2s_lrck_mst, dev->clk_i2s_bclk_mst); + if (ret) { + dev_err(&pdev->dev, "failed to set parent clk_i2s_lrck_mst\n"); + goto err_dis_bclk_mst; + } + + ret = clk_set_parent(dev->clk_i2s_bclk, dev->clk_i2s_bclk_mst); + if (ret) { + dev_err(&pdev->dev, "failed to set parent clk_i2s_bclk\n"); + goto err_dis_bclk_mst; + } + + ret = clk_set_parent(dev->clk_i2s_lrck, dev->clk_i2s_lrck_mst); + if (ret) { + dev_err(&pdev->dev, "failed to set parent clk_i2s_lrck\n"); + goto err_dis_bclk_mst; + } + + reset_control_deassert(dev->rst_i2s_apb); + reset_control_deassert(dev->rst_i2s_bclk); + + return 0; + + +err_dis_bclk_mst: +err_set_parent: + clk_disable_unprepare(dev->clk_i2s_apb); +exit: + return ret; +} + +/* + * The following tables allow a direct lookup of various parameters + * defined in the I2S block's configuration in terms of sound system + * parameters. Each table is sized to the number of entries possible + * according to the number of configuration bits describing an I2S + * block parameter. + */ + +/* Maximum bit resolution of a channel - not uniformly spaced */ +static const u32 fifo_width[COMP_MAX_WORDSIZE] = { + 12, 16, 20, 24, 32, 0, 0, 0 +}; + +/* Width of (DMA) bus */ +static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = { + DMA_SLAVE_BUSWIDTH_1_BYTE, + DMA_SLAVE_BUSWIDTH_2_BYTES, + DMA_SLAVE_BUSWIDTH_4_BYTES, + DMA_SLAVE_BUSWIDTH_UNDEFINED +}; + +/* PCM format to support channel resolution */ +static const u32 formats[COMP_MAX_WORDSIZE] = { + SNDRV_PCM_FMTBIT_S16_LE, + SNDRV_PCM_FMTBIT_S16_LE, + SNDRV_PCM_FMTBIT_S24_LE, + SNDRV_PCM_FMTBIT_S24_LE, + SNDRV_PCM_FMTBIT_S32_LE, + 0, + 0, + 0 +}; + +#define SF_PCM_RATE_32000_192000 (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) + +static int dw_configure_dai(struct dw_i2s_dev *dev, + struct snd_soc_dai_driver *dw_i2s_dai, + unsigned int rates) +{ + /* + * Read component parameter registers to extract + * the I2S block's configuration. + */ + u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); + u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2); + u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); + u32 idx; + + if (dev->capability & DWC_I2S_RECORD && + dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) + comp1 = comp1 & ~BIT(5); + + if (dev->capability & DWC_I2S_PLAY && + dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) + comp1 = comp1 & ~BIT(6); + + if (COMP1_TX_ENABLED(comp1)) { + dev_info(dev->dev, " designware: play supported\n"); + idx = COMP1_TX_WORDSIZE_0(comp1); + if (WARN_ON(idx >= ARRAY_SIZE(formats))) + return -EINVAL; + if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) + idx = 1; + dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM; + dw_i2s_dai->playback.channels_max = + (COMP1_TX_CHANNELS(comp1) + 1); + dw_i2s_dai->playback.formats = formats[idx]; + for (; idx > 0; idx--) + dw_i2s_dai->playback.formats |= formats[idx - 1]; + dw_i2s_dai->playback.rates = rates; + } + + if (COMP1_RX_ENABLED(comp1)) { + dev_info(dev->dev, "designware: record supported\n"); + idx = COMP2_RX_WORDSIZE_0(comp2); + if (WARN_ON(idx >= ARRAY_SIZE(formats))) + return -EINVAL; + if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) + idx = 1; + dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM; + dw_i2s_dai->capture.channels_max = + (COMP1_RX_CHANNELS(comp1) + 1); + dw_i2s_dai->capture.formats = formats[idx]; + for (; idx > 0; idx--) + dw_i2s_dai->capture.formats |= formats[idx - 1]; + dw_i2s_dai->capture.rates = rates; + } + + dev_dbg(dev->dev, "designware: i2s master mode supported\n"); + dev->capability |= DW_I2S_MASTER; + + dev->fifo_th = fifo_depth / 2; + dev_dbg(dev->dev, "fifo_th :%d\n", dev->fifo_th); + return 0; +} + +static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev, + struct snd_soc_dai_driver *dw_i2s_dai, + struct resource *res, + const struct i2s_platform_data *pdata) +{ + u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); + u32 idx = COMP1_APB_DATA_WIDTH(comp1); + int ret; + + if (WARN_ON(idx >= ARRAY_SIZE(bus_widths))) + return -EINVAL; + + ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates); + if (ret < 0) + return ret; + + if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) + idx = 1; + /* Set DMA slaves info */ + dev->play_dma_data.pd.data = pdata->play_dma_data; + dev->capture_dma_data.pd.data = pdata->capture_dma_data; + dev->play_dma_data.pd.addr = res->start + I2S_TXDMA; + dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA; + dev->play_dma_data.pd.max_burst = 16; + dev->capture_dma_data.pd.max_burst = 16; + dev->play_dma_data.pd.addr_width = bus_widths[idx]; + dev->capture_dma_data.pd.addr_width = bus_widths[idx]; + dev->play_dma_data.pd.filter = pdata->filter; + dev->capture_dma_data.pd.filter = pdata->filter; + + return 0; +} + +static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev, + struct snd_soc_dai_driver *dw_i2s_dai, + struct resource *res) +{ + u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1); + u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2); + u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); + u32 idx = COMP1_APB_DATA_WIDTH(comp1); + u32 idx2; + int ret; + + if (WARN_ON(idx >= ARRAY_SIZE(bus_widths))) + return -EINVAL; + + ret = dw_configure_dai(dev, dw_i2s_dai, + SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000); + if (ret < 0) + return ret; + + if (COMP1_TX_ENABLED(comp1)) { + idx2 = COMP1_TX_WORDSIZE_0(comp1); + + dev->capability |= DWC_I2S_PLAY; + dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; + dev->play_dma_data.dt.addr_width = bus_widths[idx]; + dev->play_dma_data.dt.fifo_size = fifo_depth * + (fifo_width[idx2]) >> 8; + dev->play_dma_data.dt.maxburst = 16; + } + if (COMP1_RX_ENABLED(comp1)) { + idx2 = COMP2_RX_WORDSIZE_0(comp2); + + dev->capability |= DWC_I2S_RECORD; + dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; + dev->capture_dma_data.dt.addr_width = bus_widths[idx]; + dev->capture_dma_data.dt.fifo_size = fifo_depth * + (fifo_width[idx2] >> 8); + dev->capture_dma_data.dt.maxburst = 16; + } + + return 0; + +} + +static int dw_i2s_dai_probe(struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + + snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, &dev->capture_dma_data); + return 0; +} + +static int dw_i2s_probe(struct platform_device *pdev) +{ + const struct i2s_platform_data *pdata = pdev->dev.platform_data; + struct device_node *np = pdev->dev.of_node; + struct dw_i2s_dev *dev; + struct resource *res; + int ret, irq; + struct snd_soc_dai_driver *dw_i2s_dai; + const char *clk_id; + + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL); + if (!dw_i2s_dai) + return -ENOMEM; + + dw_i2s_dai->ops = &dw_i2s_dai_ops; + dw_i2s_dai->probe = dw_i2s_dai_probe; + + dev->i2s_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(dev->i2s_base)) + return PTR_ERR(dev->i2s_base); + + dev->dev = &pdev->dev; + + irq = platform_get_irq_optional(pdev, 0); + if (irq >= 0) { + ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0, + pdev->name, dev); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request irq\n"); + return ret; + } + } + + if (of_device_is_compatible(np, "starfive,jh7110-i2stx-4ch0")) { + /* hdmi audio */ + ret = dw_i2stx_4ch0_clk_init(pdev, dev); + if (ret < 0) + goto err_clk_disable; + } + + dev->i2s_reg_comp1 = I2S_COMP_PARAM_1; + dev->i2s_reg_comp2 = I2S_COMP_PARAM_2; + + if (pdata) { + dev->capability = pdata->cap; + clk_id = NULL; + dev->quirks = pdata->quirks; + if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) { + dev->i2s_reg_comp1 = pdata->i2s_reg_comp1; + dev->i2s_reg_comp2 = pdata->i2s_reg_comp2; + } + ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata); + } else { + clk_id = "i2stx_bclk"; + ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res); + } + if (ret < 0) + return ret; + + if (dev->capability & DW_I2S_MASTER) { + if (pdata) { + dev->i2s_clk_cfg = pdata->i2s_clk_cfg; + if (!dev->i2s_clk_cfg) { + dev_err(&pdev->dev, "no clock configure method\n"); + return -ENODEV; + } + } + } + + dev_set_drvdata(&pdev->dev, dev); + ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component, + dw_i2s_dai, 1); + if (ret != 0) { + dev_err(&pdev->dev, "not able to register dai\n"); + goto err_clk_disable; + } + + if (!pdata) { + if (irq >= 0) { + ret = dw_pcm_register(pdev); + dev->use_pio = true; + } else { + ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, + 0); + dev->use_pio = false; + } + + if (ret) { + dev_err(&pdev->dev, "could not register pcm: %d\n", + ret); + goto err_clk_disable; + } + } + + pm_runtime_enable(&pdev->dev); + return 0; + +err_clk_disable: + if (dev->capability & DW_I2S_MASTER) + clk_disable_unprepare(dev->clk_i2s_bclk_mst); + return ret; +} + +static int dw_i2s_remove(struct platform_device *pdev) +{ + struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev); + + if (dev->capability & DW_I2S_MASTER) + clk_disable_unprepare(dev->clk_i2s_bclk_mst); + + pm_runtime_disable(&pdev->dev); + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id dw_i2s_of_match[] = { + { .compatible = "starfive,jh7110-i2stx-4ch0", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, dw_i2s_of_match); +#endif + +static const struct dev_pm_ops dwc_pm_ops = { + SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL) +}; + +static struct platform_driver dw_i2s_driver = { + .probe = dw_i2s_probe, + .remove = dw_i2s_remove, + .driver = { + .name = "starfive-i2s", + .of_match_table = of_match_ptr(dw_i2s_of_match), + .pm = &dwc_pm_ops, + }, +}; + +module_platform_driver(dw_i2s_driver); + +MODULE_AUTHOR("Rajeev Kumar "); +MODULE_AUTHOR("Xingyu Wu "); +MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:designware_i2s"); diff --git a/sound/soc/starfive/starfive_i2s.h b/sound/soc/starfive/starfive_i2s.h new file mode 100644 index 0000000..2e41b080 --- /dev/null +++ b/sound/soc/starfive/starfive_i2s.h @@ -0,0 +1,153 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com) + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __STARFIVE_I2S_H +#define __STARFIVE_I2S_H + +#include +#include +#include +#include +#include +#include + +/* common register for all channel */ +#define IER 0x000 +#define IRER 0x004 +#define ITER 0x008 +#define CER 0x00C +#define CCR 0x010 +#define RXFFR 0x014 +#define TXFFR 0x018 + +/* Interrupt status register fields */ +#define ISR_TXFO BIT(5) +#define ISR_TXFE BIT(4) +#define ISR_RXFO BIT(1) +#define ISR_RXDA BIT(0) + +/* I2STxRxRegisters for all channels */ +#define LRBR_LTHR(x) (0x40 * x + 0x020) +#define RRBR_RTHR(x) (0x40 * x + 0x024) +#define RER(x) (0x40 * x + 0x028) +#define TER(x) (0x40 * x + 0x02C) +#define RCR(x) (0x40 * x + 0x030) +#define TCR(x) (0x40 * x + 0x034) +#define ISR(x) (0x40 * x + 0x038) +#define IMR(x) (0x40 * x + 0x03C) +#define ROR(x) (0x40 * x + 0x040) +#define TOR(x) (0x40 * x + 0x044) +#define RFCR(x) (0x40 * x + 0x048) +#define TFCR(x) (0x40 * x + 0x04C) +#define RFF(x) (0x40 * x + 0x050) +#define TFF(x) (0x40 * x + 0x054) + +/* I2SCOMPRegisters */ +#define I2S_COMP_PARAM_2 0x01F0 +#define I2S_COMP_PARAM_1 0x01F4 +#define I2S_COMP_VERSION 0x01F8 +#define I2S_COMP_TYPE 0x01FC + +/* + * Component parameter register fields - define the I2S block's + * configuration. + */ +#define COMP1_TX_WORDSIZE_3(r) (((r) & GENMASK(27, 25)) >> 25) +#define COMP1_TX_WORDSIZE_2(r) (((r) & GENMASK(24, 22)) >> 22) +#define COMP1_TX_WORDSIZE_1(r) (((r) & GENMASK(21, 19)) >> 19) +#define COMP1_TX_WORDSIZE_0(r) (((r) & GENMASK(18, 16)) >> 16) +#define COMP1_TX_CHANNELS(r) (((r) & GENMASK(10, 9)) >> 9) +#define COMP1_RX_CHANNELS(r) (((r) & GENMASK(8, 7)) >> 7) +#define COMP1_RX_ENABLED(r) (((r) & BIT(6)) >> 6) +#define COMP1_TX_ENABLED(r) (((r) & BIT(5)) >> 5) +#define COMP1_MODE_EN(r) (((r) & BIT(4)) >> 4) +#define COMP1_FIFO_DEPTH_GLOBAL(r) (((r) & GENMASK(3, 2)) >> 2) +#define COMP1_APB_DATA_WIDTH(r) (((r) & GENMASK(1, 0)) >> 0) + +#define COMP2_RX_WORDSIZE_3(r) (((r) & GENMASK(12, 10)) >> 10) +#define COMP2_RX_WORDSIZE_2(r) (((r) & GENMASK(9, 7)) >> 7) +#define COMP2_RX_WORDSIZE_1(r) (((r) & GENMASK(5, 3)) >> 3) +#define COMP2_RX_WORDSIZE_0(r) (((r) & GENMASK(2, 0)) >> 0) + +/* Number of entries in WORDSIZE and DATA_WIDTH parameter registers */ +#define COMP_MAX_WORDSIZE (1 << 3) +#define COMP_MAX_DATA_WIDTH (1 << 2) + +#define MAX_CHANNEL_NUM 8 +#define MIN_CHANNEL_NUM 2 + +/* SYSCON Registers */ +#define I2SRX_3CH_ADC_MASK 0x2 +#define I2SRX_3CH_ADC_EN BIT(1) +#define AUDIO_SDIN_MUX_MASK 0x3FC00 +#define I2SRX_DATA_SRC_PDM (0x91 << 10) + +union dw_i2s_snd_dma_data { + struct i2s_dma_data pd; + struct snd_dmaengine_dai_dma_data dt; +}; + +struct dw_i2s_dev { + void __iomem *i2s_base; + struct regmap *syscon_base; + int active; + unsigned int capability; + unsigned int quirks; + unsigned int i2s_reg_comp1; + unsigned int i2s_reg_comp2; + struct device *dev; + u32 ccr; + u32 xfer_resolution; + u32 fifo_th; + + struct clk *clk_i2s_apb; + struct clk *clk_i2s_bclk_mst; + struct clk *clk_i2s_lrck_mst; + struct clk *clk_i2s_bclk; + struct clk *clk_i2s_lrck; + struct clk *clk_mclk; + struct clk *clk_mclk_ext; + struct clk *clk_mclk_inner; + struct reset_control *rst_i2s_apb; + struct reset_control *rst_i2s_bclk; + + /* data related to DMA transfers b/w i2s and DMAC */ + union dw_i2s_snd_dma_data play_dma_data; + union dw_i2s_snd_dma_data capture_dma_data; + struct i2s_clk_config_data config; + int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); + + /* data related to PIO transfers */ + bool use_pio; + struct snd_pcm_substream __rcu *tx_substream; + struct snd_pcm_substream __rcu *rx_substream; + unsigned int (*tx_fn)(struct dw_i2s_dev *dev, + struct snd_pcm_runtime *runtime, unsigned int tx_ptr, + bool *period_elapsed); + unsigned int (*rx_fn)(struct dw_i2s_dev *dev, + struct snd_pcm_runtime *runtime, unsigned int rx_ptr, + bool *period_elapsed); + unsigned int tx_ptr; + unsigned int rx_ptr; +}; + +#if IS_ENABLED(CONFIG_SND_DESIGNWARE_PCM) +void dw_pcm_push_tx(struct dw_i2s_dev *dev); +void dw_pcm_pop_rx(struct dw_i2s_dev *dev); +int dw_pcm_register(struct platform_device *pdev); +#else +static inline void dw_pcm_push_tx(struct dw_i2s_dev *dev) { } +static inline void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { } +static inline int dw_pcm_register(struct platform_device *pdev) +{ + return -EINVAL; +} +#endif + +#endif -- 2.7.4