This driver was ported from an old version in linux 2.6.27 and adjusted for the new ASoC framework and DMA API.

Signed-off-by: Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com --- .../bindings/sound/nxp,lpc3220-i2s.yaml | 50 +++ arch/arm/boot/dts/lpc32xx.dtsi | 4 + arch/arm/mach-lpc32xx/phy3250.c | 60 +++ sound/soc/fsl/Kconfig | 7 + sound/soc/fsl/Makefile | 2 + sound/soc/fsl/lpc3xxx-i2s.c | 411 ++++++++++++++++++ sound/soc/fsl/lpc3xxx-i2s.h | 94 ++++ sound/soc/fsl/lpc3xxx-pcm.c | 75 ++++ 8 files changed, 703 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml create mode 100644 sound/soc/fsl/lpc3xxx-i2s.c create mode 100644 sound/soc/fsl/lpc3xxx-i2s.h create mode 100644 sound/soc/fsl/lpc3xxx-pcm.c

diff --git a/Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml b/Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml new file mode 100644 index 000000000000..e41330b6775c --- /dev/null +++ b/Documentation/devicetree/bindings/sound/nxp,lpc3220-i2s.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/nxp,lpc3220-i2s.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP LPC32XX I2S Controller + +description: + The block adds I2S and PCM drivers for LPC32XX + +properties: + compatible: + enum: + - nxp,lpc3220-i2s + + reg: + maxItems: 1 + + clocks: + items: + - description: input clock of the peripheral. + + clock-names: + items: + - const: i2s_clk + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - clock-names + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/lpc32xx-clock.h> + + i2s0: i2s@20094000 { + compatible = "nxp,lpc3220-i2s"; + reg = <0x20094000 0x1000>; + clocks = <&clk LPC32XX_CLK_I2S0>; + clock-names = "i2s_clk"; + }; + +... diff --git a/arch/arm/boot/dts/lpc32xx.dtsi b/arch/arm/boot/dts/lpc32xx.dtsi index c87066d6c995..dc5738f2b42d 100644 --- a/arch/arm/boot/dts/lpc32xx.dtsi +++ b/arch/arm/boot/dts/lpc32xx.dtsi @@ -221,6 +221,8 @@ spi2: spi@20090000 { i2s0: i2s@20094000 { compatible = "nxp,lpc3220-i2s"; reg = <0x20094000 0x1000>; + clocks = <&clk LPC32XX_CLK_I2S0>; + clock-names = "i2s_clk"; status = "disabled"; };

@@ -237,6 +239,8 @@ sd: sd@20098000 { i2s1: i2s@2009c000 { compatible = "nxp,lpc3220-i2s"; reg = <0x2009c000 0x1000>; + clocks = <&clk LPC32XX_CLK_I2S1>; + clock-names = "i2s_clk"; status = "disabled"; };

diff --git a/arch/arm/mach-lpc32xx/phy3250.c b/arch/arm/mach-lpc32xx/phy3250.c index 66701bf43248..b866b9a75558 100644 --- a/arch/arm/mach-lpc32xx/phy3250.c +++ b/arch/arm/mach-lpc32xx/phy3250.c @@ -9,6 +9,7 @@ */

#include <linux/amba/pl08x.h> +#include <linux/amba/pl022.h> #include <linux/mtd/lpc32xx_mlc.h> #include <linux/mtd/lpc32xx_slc.h> #include <linux/of_platform.h> @@ -29,6 +30,46 @@ static struct pl08x_channel_data pl08x_slave_channels[] = { .max_signal = 12, .periph_buses = PL08X_AHB1, }, + { + .bus_id = "i2s-tx", + .min_signal = 13, + .max_signal = 13, + .periph_buses = PL08X_AHB1, + }, + { + .bus_id = "i2s-rx", + .min_signal = 0, + .max_signal = 0, + .periph_buses = PL08X_AHB1, + }, + { + .bus_id = "ssp0-tx", + .min_signal = 15, + .max_signal = 15, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, + { + .bus_id = "ssp0-rx", + .min_signal = 14, + .max_signal = 14, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, + { + .bus_id = "ssp1-tx", + .min_signal = 11, + .max_signal = 11, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, + { + .bus_id = "ssp1-rx", + .min_signal = 3, + .max_signal = 3, + .muxval = 1, + .periph_buses = PL08X_AHB1, + }, };

static int pl08x_get_signal(const struct pl08x_channel_data *cd) @@ -60,12 +101,31 @@ static struct lpc32xx_mlc_platform_data lpc32xx_mlc_data = { .dma_filter = pl08x_filter_id, };

+static struct pl022_ssp_controller lpc32xx_ssp_data[] = { + { + .bus_id = 0, + .enable_dma = 0, + .dma_filter = pl08x_filter_id, + .dma_tx_param = "ssp0-tx", + .dma_rx_param = "ssp0-rx", + }, + { + .bus_id = 1, + .enable_dma = 0, + .dma_filter = pl08x_filter_id, + .dma_tx_param = "ssp1-tx", + .dma_rx_param = "ssp1-rx", + } +}; + static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = { OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd), OF_DEV_AUXDATA("nxp,lpc3220-slc", 0x20020000, "20020000.flash", &lpc32xx_slc_data), OF_DEV_AUXDATA("nxp,lpc3220-mlc", 0x200a8000, "200a8000.flash", &lpc32xx_mlc_data), + OF_DEV_AUXDATA("arm,pl022", 0x20084000, NULL, &lpc32xx_ssp_data[0]), + OF_DEV_AUXDATA("arm,pl022", 0x2008c000, NULL, &lpc32xx_ssp_data[1]), { } };

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index 258306d8ce51..5f25aa7d632c 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -132,6 +132,13 @@ config SND_SOC_FSL_RPMSG This option is only useful for out-of-tree drivers since in-tree drivers select it automatically.

+config SND_SOC_FSL_LPC3XXX + tristate "SoC Audio for NXP LPC32XX CPUs" + depends on ARCH_LPC32XX && SND_SOC + select SND_SOC_GENERIC_DMAENGINE_PCM + help + Say Y or M if you want to add support for the LPC3XXX I2S interface. + config SND_SOC_IMX_PCM_DMA tristate select SND_SOC_GENERIC_DMAENGINE_PCM diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index 9f743fcc0e02..988dc98cdfc6 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -29,6 +29,7 @@ snd-soc-fsl-easrc-objs := fsl_easrc.o snd-soc-fsl-xcvr-objs := fsl_xcvr.o snd-soc-fsl-aud2htx-objs := fsl_aud2htx.o snd-soc-fsl-rpmsg-objs := fsl_rpmsg.o +snd-soc-fsl-lpc3xxx-objs := lpc3xxx-pcm.o lpc3xxx-i2s.o

obj-$(CONFIG_SND_SOC_FSL_AUDMIX) += snd-soc-fsl-audmix.o obj-$(CONFIG_SND_SOC_FSL_ASOC_CARD) += snd-soc-fsl-asoc-card.o @@ -45,6 +46,7 @@ obj-$(CONFIG_SND_SOC_POWERPC_DMA) += snd-soc-fsl-dma.o obj-$(CONFIG_SND_SOC_FSL_XCVR) += snd-soc-fsl-xcvr.o obj-$(CONFIG_SND_SOC_FSL_AUD2HTX) += snd-soc-fsl-aud2htx.o obj-$(CONFIG_SND_SOC_FSL_RPMSG) += snd-soc-fsl-rpmsg.o +obj-$(CONFIG_SND_SOC_FSL_LPC3XXX) += snd-soc-fsl-lpc3xxx.o

# MPC5200 Platform Support obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o diff --git a/sound/soc/fsl/lpc3xxx-i2s.c b/sound/soc/fsl/lpc3xxx-i2s.c new file mode 100644 index 000000000000..853284eb14f1 --- /dev/null +++ b/sound/soc/fsl/lpc3xxx-i2s.c @@ -0,0 +1,411 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Author: Kevin Wells kevin.wells@nxp.com + * + * Copyright (C) 2008 NXP Semiconductors + * Copyright 2023 Timesys Corporation piotr.wojtaszczyk@timesys.com + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/clk.h> +#include <linux/io.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/dmaengine_pcm.h> +#include <sound/initval.h> +#include <sound/soc.h> + +#include "lpc3xxx-i2s.h" + +#define I2S_PLAYBACK_FLAG 0x1 +#define I2S_CAPTURE_FLAG 0x2 + +#define LPC3XXX_I2S_RATES ( \ + SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ + SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000) + +#define LPC3XXX_I2S_FORMATS ( \ + SNDRV_PCM_FMTBIT_S8 | \ + SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) + +static u32 absd32(u32 v1, u32 v2) +{ + if (v1 > v2) { + return v1 - v2; + } + return v2 - v1; +} + +static void __lpc3xxx_find_clkdiv(u32 *clkx, u32 *clky, int freq, + int xbytes, u32 clkrate) +{ + u32 i2srate; + u32 idxx, idyy; + u32 savedbitclkrate, diff, trate, baseclk; + + /* Adjust rate for sample size (bits) and 2 channels and offset for + * divider in clock output + */ + i2srate = (freq / 100) * 2 * (8 * xbytes); + i2srate = i2srate << 1; + clkrate = clkrate / 100; + baseclk = clkrate; + *clkx = 1; + *clky = 1; + + /* Find the best divider */ + *clkx = *clky = 0; + savedbitclkrate = 0; + diff = ~0; + for (idxx = 1; idxx < 0xFF; idxx++) { + for (idyy = 1; idyy < 0xFF; idyy++) { + trate = (baseclk * idxx) / idyy; + if (absd32(trate, i2srate) < diff) { + diff = absd32(trate, i2srate); + savedbitclkrate = trate; + *clkx = idxx; + *clky = idyy; + } + } + } +} + +static int lpc3xxx_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(cpu_dai); + struct device *dev = i2s_info_p->dev; + u32 flag; + int ret = 0; + + mutex_lock(&i2s_info_p->lock); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + flag = I2S_PLAYBACK_FLAG; + } else { + flag = I2S_CAPTURE_FLAG; + } + + if (flag & i2s_info_p->streams_in_use) { + dev_warn(dev, "I2S channel is busy\n"); + ret = -EBUSY; + goto lpc32xx_unlock; + } + + if (i2s_info_p->streams_in_use == 0) { + ret = clk_prepare_enable(i2s_info_p->clk); + if (ret) { + dev_err(dev, "Can't enable clock, err=%d\n", ret); + goto lpc32xx_unlock; + } + } + + i2s_info_p->streams_in_use |= flag; + +lpc32xx_unlock: + mutex_unlock(&i2s_info_p->lock); + return ret; +} + +static void lpc3xxx_i2s_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(cpu_dai); + struct regmap *regs = i2s_info_p->regs; + const u32 stop_bits = (I2S_RESET | I2S_STOP); + u32 flag; + + mutex_lock(&i2s_info_p->lock); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + flag = I2S_PLAYBACK_FLAG; + regmap_write(regs, I2S_TX_RATE, 0); + regmap_update_bits(regs, I2S_DAO, stop_bits, stop_bits); + } else { + flag = I2S_CAPTURE_FLAG; + regmap_write(regs, I2S_RX_RATE, 0); + regmap_update_bits(regs, I2S_DAI, stop_bits, stop_bits); + } + i2s_info_p->streams_in_use &= ~flag; + + if (i2s_info_p->streams_in_use == 0) { + clk_disable_unprepare(i2s_info_p->clk); + } + + mutex_unlock(&i2s_info_p->lock); +} + +static int lpc3xxx_i2s_set_dai_sysclk(struct snd_soc_dai *cpu_dai, + int clk_id, unsigned int freq, int dir) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(cpu_dai); + + /* Will use in HW params later */ + i2s_info_p->freq = freq; + + return 0; +} + +static int lpc3xxx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, + unsigned int fmt) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(cpu_dai); + struct device *dev = i2s_info_p->dev; + + if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) { + dev_warn(dev, "unsupported bus format %d\n", fmt); + return -EINVAL; + } + return 0; +} + +static int lpc3xxx_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, struct snd_soc_dai *cpu_dai) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(cpu_dai); + struct device *dev = i2s_info_p->dev; + struct regmap *regs = i2s_info_p->regs; + int xfersize; + u32 tmp, clkx, clky; + + tmp = I2S_RESET | I2S_STOP; + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S8: + tmp |= I2S_WW8 | I2S_WS_HP(I2S_WW8_HP); + xfersize = 1; + break; + + case SNDRV_PCM_FORMAT_S16_LE: + tmp |= I2S_WW16 | I2S_WS_HP(I2S_WW16_HP); + xfersize = 2; + break; + + case SNDRV_PCM_FORMAT_S32_LE: + tmp |= I2S_WW32 | I2S_WS_HP(I2S_WW32_HP); + xfersize = 4; + break; + + default: + dev_warn(dev, "Unsupported audio data format %d\n", + params_format(params)); + return -EINVAL; + } + + if (params_channels(params) == 1) { + tmp |= I2S_MONO; + } + + __lpc3xxx_find_clkdiv(&clkx, &clky, i2s_info_p->freq, xfersize, i2s_info_p->clkrate); + + dev_dbg(dev, "Stream : %s\n", + substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture"); + dev_dbg(dev, "Desired clock rate : %d\n", i2s_info_p->freq); + dev_dbg(dev, "Base clock rate : %d\n", i2s_info_p->clkrate); + dev_dbg(dev, "Transfer size (bytes) : %d\n", xfersize); + dev_dbg(dev, "Clock divider (x) : %d\n", clkx); + dev_dbg(dev, "Clock divider (y) : %d\n", clky); + dev_dbg(dev, "Channels : %d\n", params_channels(params)); + dev_dbg(dev, "Data format : %s\n", "I2S"); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + regmap_write(regs, I2S_DMA1, I2S_DMA1_TX_EN | I2S_DMA0_TX_DEPTH(4)); + regmap_write(regs, I2S_TX_RATE, (clkx << 8) | clky); + regmap_write(regs, I2S_DAO, tmp); + } else { + regmap_write(regs, I2S_DMA0, I2S_DMA0_RX_EN | I2S_DMA1_RX_DEPTH(4)); + regmap_write(regs, I2S_RX_RATE, (clkx << 8) | clky); + regmap_write(regs, I2S_DAI, tmp); + } + + return 0; +} + +static int lpc3xxx_i2s_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) +{ + return 0; +} + +static int lpc3xxx_i2s_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *cpu_dai) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(cpu_dai); + struct regmap *regs = i2s_info_p->regs; + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + regmap_update_bits(regs, I2S_DAO, I2S_STOP, I2S_STOP); + } else { + regmap_update_bits(regs, I2S_DAI, I2S_STOP, I2S_STOP); + } + break; + + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + regmap_update_bits(regs, I2S_DAO, (I2S_RESET | I2S_STOP), 0); + } else { + regmap_update_bits(regs, I2S_DAI, (I2S_RESET | I2S_STOP), 0); + } + break; + default: + ret = -EINVAL; + } + + return ret; +} + +const struct snd_soc_dai_ops lpc3xxx_i2s_dai_ops = { + .startup = lpc3xxx_i2s_startup, + .shutdown = lpc3xxx_i2s_shutdown, + .prepare = lpc3xxx_i2s_prepare, + .trigger = lpc3xxx_i2s_trigger, + .hw_params = lpc3xxx_i2s_hw_params, + .set_sysclk = lpc3xxx_i2s_set_dai_sysclk, + .set_fmt = lpc3xxx_i2s_set_dai_fmt, +}; + +static int lpc3xxx_i2s_dai_probe(struct snd_soc_dai *dai) +{ + struct lpc3xxx_i2s_info *i2s_info_p = snd_soc_dai_get_drvdata(dai); + + snd_soc_dai_init_dma_data(dai, &i2s_info_p->playback_dma_config, + &i2s_info_p->capture_dma_config); + return 0; +} + +struct snd_soc_dai_driver lpc3xxx_i2s_dai_driver = { + .probe = lpc3xxx_i2s_dai_probe, + .playback = { + .channels_min = 1, + .channels_max = 2, + .rates = LPC3XXX_I2S_RATES, + .formats = LPC3XXX_I2S_FORMATS, + }, + .capture = { + .channels_min = 1, + .channels_max = 2, + .rates = LPC3XXX_I2S_RATES, + .formats = LPC3XXX_I2S_FORMATS, + }, + .ops = &lpc3xxx_i2s_dai_ops, + .symmetric_rate = 1, + .symmetric_channels = 1, + .symmetric_sample_bits = 1, +}; + +static const struct snd_soc_component_driver lpc32xx_i2s_component = { + .name = "lpc32xx-i2s", +}; + +static const struct regmap_config lpc32xx_i2s_regconfig = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = I2S_RX_RATE, +}; + +static int lpc32xx_i2s_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct lpc3xxx_i2s_info *i2s_info_p; + struct resource *res; + void __iomem *iomem; + int ret; + + i2s_info_p = devm_kzalloc(dev, sizeof(*i2s_info_p), GFP_KERNEL); + if (!i2s_info_p) + return -ENOMEM; + + platform_set_drvdata(pdev, i2s_info_p); + i2s_info_p->dev = dev; + + iomem = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(iomem)) { + dev_err(dev, "Can't map registers\n"); + return PTR_ERR(iomem); + } + + i2s_info_p->regs = devm_regmap_init_mmio(dev, iomem, &lpc32xx_i2s_regconfig); + if (IS_ERR(i2s_info_p->regs)) { + ret = PTR_ERR(i2s_info_p->regs); + dev_err(dev, "failed to init register map: %d\n", ret); + return ret; + } + + i2s_info_p->clk = devm_clk_get(dev, "i2s_clk"); + if (IS_ERR(i2s_info_p->clk)) { + dev_err(dev, "Can't get clock\n"); + return PTR_ERR(i2s_info_p->clk); + } + + i2s_info_p->clkrate = clk_get_rate(i2s_info_p->clk); + if (i2s_info_p->clkrate == 0) { + dev_err(dev, "Invalid returned clock rate\n"); + goto err_clk_disable; + } + + mutex_init(&i2s_info_p->lock); + + ret = devm_snd_soc_register_component(dev, &lpc32xx_i2s_component, + &lpc3xxx_i2s_dai_driver, 1); + if (ret) { + dev_err(dev, "Can't register cpu_dai component\n"); + goto err_clk_disable; + } + + i2s_info_p->playback_dma_config.addr = (dma_addr_t)(res->start + I2S_TX_FIFO); + i2s_info_p->playback_dma_config.maxburst = 4; + i2s_info_p->playback_dma_config.filter_data = "i2s-tx"; + i2s_info_p->capture_dma_config.addr = (dma_addr_t)(res->start + I2S_RX_FIFO); + i2s_info_p->capture_dma_config.maxburst = 4; + i2s_info_p->capture_dma_config.filter_data = "i2s-rx"; + + ret = lpc3xxx_pcm_register(pdev); + if (ret) { + dev_err(dev, "Can't register pcm component\n"); + goto err_clk_disable; + } + + return 0; + +err_clk_disable: + return ret; +} + +static int lpc32xx_i2s_remove(struct platform_device *pdev) +{ + return 0; +} + +static const struct of_device_id lpc32xx_i2s_match[] = { + { .compatible = "nxp,lpc3220-i2s" }, + {}, +}; +MODULE_DEVICE_TABLE(of, lpc32xx_i2s_match); + +static struct platform_driver lpc32xx_i2s_driver = { + .probe = lpc32xx_i2s_probe, + .remove = lpc32xx_i2s_remove, + .driver = { + .name = "lpc3xxx-i2s", + .of_match_table = of_match_ptr(lpc32xx_i2s_match), + }, +}; + +module_platform_driver(lpc32xx_i2s_driver); + +MODULE_AUTHOR("Kevin Wells kevin.wells@nxp.com"); +MODULE_AUTHOR("Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com"); +MODULE_DESCRIPTION("ASoC LPC3XXX I2S interface"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/fsl/lpc3xxx-i2s.h b/sound/soc/fsl/lpc3xxx-i2s.h new file mode 100644 index 000000000000..f88ab74cfe41 --- /dev/null +++ b/sound/soc/fsl/lpc3xxx-i2s.h @@ -0,0 +1,94 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Author: Kevin Wells kevin.wells@nxp.com + * + * Copyright (C) 2008 NXP Semiconductors + * Copyright 2023 Timesys Corporation piotr.wojtaszczyk@timesys.com + */ + +#ifndef __SOUND_SOC_LPC3XXX_I2S_H +#define __SOUND_SOC_LPC3XXX_I2S_H + +#include <linux/types.h> +#include <linux/regmap.h> + +struct lpc3xxx_i2s_info { + struct device *dev; + struct clk *clk; + struct mutex lock; + struct regmap *regs; + u32 streams_in_use; + u32 clkrate; + int freq; + struct snd_dmaengine_dai_dma_data playback_dma_config; + struct snd_dmaengine_dai_dma_data capture_dma_config; +}; + +int lpc3xxx_pcm_register(struct platform_device *pdev); + +#define _SBF(f, v) ((v) << (f)) +#define _BIT(n) _SBF(n, 1) + +/* I2S controller register offsets */ +#define I2S_DAO 0x00 +#define I2S_DAI 0x04 +#define I2S_TX_FIFO 0x08 +#define I2S_RX_FIFO 0x0C +#define I2S_STAT 0x10 +#define I2S_DMA0 0x14 +#define I2S_DMA1 0x18 +#define I2S_IRQ 0x1C +#define I2S_TX_RATE 0x20 +#define I2S_RX_RATE 0x24 + +/* i2s_daO i2s_dai register definitions */ +#define I2S_WW8 _SBF(0, 0) /* Word width is 8bit*/ +#define I2S_WW16 _SBF(0, 1) /* Word width is 16bit*/ +#define I2S_WW32 _SBF(0, 3) /* Word width is 32bit*/ +#define I2S_MONO _BIT(2) /* Mono */ +#define I2S_STOP _BIT(3) /* Stop, diables the access to FIFO, mutes the channel */ +#define I2S_RESET _BIT(4) /* Reset the channel */ +#define I2S_WS_SEL _BIT(5) /* Channel Master(0) or slave(1) mode select*/ +#define I2S_WS_HP(s) _SBF(6, s) /* Word select half period - 1 */ + +#define I2S_MUTE _BIT(15) /* Mute the channel, Transmit channel only */ + +#define I2S_WW32_HP 0x1f /* Word select half period for 32bit word width */ +#define I2S_WW16_HP 0x0f /* Word select half period for 16bit word width */ +#define I2S_WW8_HP 0x7 /* Word select half period for 8bit word width */ + +#define WSMASK_HP 0X7FC /* Mask for WS half period bits */ + +/* i2s_tx_fifo register definitions */ +#define I2S_FIFO_TX_WRITE(d) (d) + +/* i2s_rx_fifo register definitions */ +#define I2S_FIFO_RX_WRITE(d) (d) + +/* i2s_stat register definitions */ +#define I2S_IRQ_STAT _BIT(0) +#define I2S_DMA0_REQ _BIT(1) +#define I2S_DMA1_REQ _BIT(2) + +#define I2S_RX_STATE_MASK 0x0000ff00 +#define I2S_TX_STATE_MASK 0x00ff0000 + +/* i2s_dma0 Configuration register definitions */ +#define I2S_DMA0_RX_EN _BIT(0) /* Enable RX DMA1*/ +#define I2S_DMA0_TX_EN _BIT(1) /* Enable TX DMA1*/ +#define I2S_DMA0_RX_DEPTH(s) _SBF(8, s) /* Set the level for DMA1 RX Request */ +#define I2S_DMA0_TX_DEPTH(s) _SBF(16, s) /* Set the level for DMA1 TX Request */ + +/* i2s_dma1 Configuration register definitions */ +#define I2S_DMA1_RX_EN _BIT(0) /* Enable RX DMA1*/ +#define I2S_DMA1_TX_EN _BIT(1) /* Enable TX DMA1*/ +#define I2S_DMA1_RX_DEPTH(s) _SBF(8, s) /* Set the level for DMA1 RX Request */ +#define I2S_DMA1_TX_DEPTH(s) _SBF(16, s) /* Set the level for DMA1 TX Request */ + +/* i2s_irq register definitions */ +#define I2S_RX_IRQ_EN _BIT(0) /* Enable RX IRQ*/ +#define I2S_TX_IRQ_EN _BIT(1) /* Enable TX IRQ*/ +#define I2S_IRQ_RX_DEPTH(s) _SBF(8, s) /* valid values ar 0 to 7 */ +#define I2S_IRQ_TX_DEPTH(s) _SBF(16, s) /* valid values ar 0 to 7 */ + +#endif diff --git a/sound/soc/fsl/lpc3xxx-pcm.c b/sound/soc/fsl/lpc3xxx-pcm.c new file mode 100644 index 000000000000..2dbc60d06452 --- /dev/null +++ b/sound/soc/fsl/lpc3xxx-pcm.c @@ -0,0 +1,75 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Author: Kevin Wells kevin.wells@nxp.com + * + * Copyright (C) 2008 NXP Semiconductors + * Copyright 2023 Timesys Corporation piotr.wojtaszczyk@timesys.com + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/dma-mapping.h> +#include <linux/amba/pl08x.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/dmaengine_pcm.h> +#include <sound/soc.h> + +#include "lpc3xxx-i2s.h" + +#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ + SNDRV_PCM_FMTBIT_U8 | \ + SNDRV_PCM_FMTBIT_S16_LE | \ + SNDRV_PCM_FMTBIT_U16_LE | \ + SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_U24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE | \ + SNDRV_PCM_FMTBIT_U32_LE | \ + SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) + + +static const struct snd_pcm_hardware lpc3xxx_pcm_hardware = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_RESUME), + .formats = STUB_FORMATS, + .period_bytes_min = 128, + .period_bytes_max = 2048, + .periods_min = 2, + .periods_max = 1024, + .buffer_bytes_max = 128 * 1024 +}; + +static const struct snd_dmaengine_pcm_config lpc3xxx_dmaengine_pcm_config = { + .pcm_hardware = &lpc3xxx_pcm_hardware, + .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, + .compat_filter_fn = pl08x_filter_id, + .prealloc_buffer_size = 128 * 1024, +}; + +const struct snd_soc_component_driver lpc3xxx_soc_platform_driver = { + .name = "lpc32xx-pcm", +}; + +int lpc3xxx_pcm_register(struct platform_device *pdev) +{ + int ret; + + ret = devm_snd_dmaengine_pcm_register(&pdev->dev, &lpc3xxx_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_NO_DT | SND_DMAENGINE_PCM_FLAG_COMPAT); + if (ret) { + dev_err(&pdev->dev, "failed to register dmaengine: %d\n", ret); + return ret; + } + + return devm_snd_soc_register_component(&pdev->dev, &lpc3xxx_soc_platform_driver, + NULL, 0); +} +EXPORT_SYMBOL(lpc3xxx_pcm_register);