diff options
Diffstat (limited to 'sound/soc/sunxi/sun4i-spdif.c')
| -rw-r--r-- | sound/soc/sunxi/sun4i-spdif.c | 550 |
1 files changed, 550 insertions, 0 deletions
diff --git a/sound/soc/sunxi/sun4i-spdif.c b/sound/soc/sunxi/sun4i-spdif.c new file mode 100644 index 000000000000..0b04fb02125c --- /dev/null +++ b/sound/soc/sunxi/sun4i-spdif.c @@ -0,0 +1,550 @@ +/* + * ALSA SoC SPDIF Audio Layer + * + * Copyright 2015 Andrea Venturi <be17068@iperbole.bo.it> + * Copyright 2015 Marcus Cooper <codekipper@gmail.com> + * + * Based on the Allwinner SDK driver, released under the GPL. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/regmap.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#define SUN4I_SPDIF_CTL (0x00) + #define SUN4I_SPDIF_CTL_MCLKDIV(v) ((v) << 4) /* v even */ + #define SUN4I_SPDIF_CTL_MCLKOUTEN BIT(2) + #define SUN4I_SPDIF_CTL_GEN BIT(1) + #define SUN4I_SPDIF_CTL_RESET BIT(0) + +#define SUN4I_SPDIF_TXCFG (0x04) + #define SUN4I_SPDIF_TXCFG_SINGLEMOD BIT(31) + #define SUN4I_SPDIF_TXCFG_ASS BIT(17) + #define SUN4I_SPDIF_TXCFG_NONAUDIO BIT(16) + #define SUN4I_SPDIF_TXCFG_TXRATIO(v) ((v) << 4) + #define SUN4I_SPDIF_TXCFG_TXRATIO_MASK GENMASK(8, 4) + #define SUN4I_SPDIF_TXCFG_FMTRVD GENMASK(3, 2) + #define SUN4I_SPDIF_TXCFG_FMT16BIT (0 << 2) + #define SUN4I_SPDIF_TXCFG_FMT20BIT (1 << 2) + #define SUN4I_SPDIF_TXCFG_FMT24BIT (2 << 2) + #define SUN4I_SPDIF_TXCFG_CHSTMODE BIT(1) + #define SUN4I_SPDIF_TXCFG_TXEN BIT(0) + +#define SUN4I_SPDIF_RXCFG (0x08) + #define SUN4I_SPDIF_RXCFG_LOCKFLAG BIT(4) + #define SUN4I_SPDIF_RXCFG_CHSTSRC BIT(3) + #define SUN4I_SPDIF_RXCFG_CHSTCP BIT(1) + #define SUN4I_SPDIF_RXCFG_RXEN BIT(0) + +#define SUN4I_SPDIF_TXFIFO (0x0C) + +#define SUN4I_SPDIF_RXFIFO (0x10) + +#define SUN4I_SPDIF_FCTL (0x14) + #define SUN4I_SPDIF_FCTL_FIFOSRC BIT(31) + #define SUN4I_SPDIF_FCTL_FTX BIT(17) + #define SUN4I_SPDIF_FCTL_FRX BIT(16) + #define SUN4I_SPDIF_FCTL_TXTL(v) ((v) << 8) + #define SUN4I_SPDIF_FCTL_TXTL_MASK GENMASK(12, 8) + #define SUN4I_SPDIF_FCTL_RXTL(v) ((v) << 3) + #define SUN4I_SPDIF_FCTL_RXTL_MASK GENMASK(7, 3) + #define SUN4I_SPDIF_FCTL_TXIM BIT(2) + #define SUN4I_SPDIF_FCTL_RXOM(v) ((v) << 0) + #define SUN4I_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0) + +#define SUN4I_SPDIF_FSTA (0x18) + #define SUN4I_SPDIF_FSTA_TXE BIT(14) + #define SUN4I_SPDIF_FSTA_TXECNTSHT (8) + #define SUN4I_SPDIF_FSTA_RXA BIT(6) + #define SUN4I_SPDIF_FSTA_RXACNTSHT (0) + +#define SUN4I_SPDIF_INT (0x1C) + #define SUN4I_SPDIF_INT_RXLOCKEN BIT(18) + #define SUN4I_SPDIF_INT_RXUNLOCKEN BIT(17) + #define SUN4I_SPDIF_INT_RXPARERREN BIT(16) + #define SUN4I_SPDIF_INT_TXDRQEN BIT(7) + #define SUN4I_SPDIF_INT_TXUIEN BIT(6) + #define SUN4I_SPDIF_INT_TXOIEN BIT(5) + #define SUN4I_SPDIF_INT_TXEIEN BIT(4) + #define SUN4I_SPDIF_INT_RXDRQEN BIT(2) + #define SUN4I_SPDIF_INT_RXOIEN BIT(1) + #define SUN4I_SPDIF_INT_RXAIEN BIT(0) + +#define SUN4I_SPDIF_ISTA (0x20) + #define SUN4I_SPDIF_ISTA_RXLOCKSTA BIT(18) + #define SUN4I_SPDIF_ISTA_RXUNLOCKSTA BIT(17) + #define SUN4I_SPDIF_ISTA_RXPARERRSTA BIT(16) + #define SUN4I_SPDIF_ISTA_TXUSTA BIT(6) + #define SUN4I_SPDIF_ISTA_TXOSTA BIT(5) + #define SUN4I_SPDIF_ISTA_TXESTA BIT(4) + #define SUN4I_SPDIF_ISTA_RXOSTA BIT(1) + #define SUN4I_SPDIF_ISTA_RXASTA BIT(0) + +#define SUN4I_SPDIF_TXCNT (0x24) + +#define SUN4I_SPDIF_RXCNT (0x28) + +#define SUN4I_SPDIF_TXCHSTA0 (0x2C) + #define SUN4I_SPDIF_TXCHSTA0_CLK(v) ((v) << 28) + #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ(v) ((v) << 24) + #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ_MASK GENMASK(27, 24) + #define SUN4I_SPDIF_TXCHSTA0_CHNUM(v) ((v) << 20) + #define SUN4I_SPDIF_TXCHSTA0_CHNUM_MASK GENMASK(23, 20) + #define SUN4I_SPDIF_TXCHSTA0_SRCNUM(v) ((v) << 16) + #define SUN4I_SPDIF_TXCHSTA0_CATACOD(v) ((v) << 8) + #define SUN4I_SPDIF_TXCHSTA0_MODE(v) ((v) << 6) + #define SUN4I_SPDIF_TXCHSTA0_EMPHASIS(v) ((v) << 3) + #define SUN4I_SPDIF_TXCHSTA0_CP BIT(2) + #define SUN4I_SPDIF_TXCHSTA0_AUDIO BIT(1) + #define SUN4I_SPDIF_TXCHSTA0_PRO BIT(0) + +#define SUN4I_SPDIF_TXCHSTA1 (0x30) + #define SUN4I_SPDIF_TXCHSTA1_CGMSA(v) ((v) << 8) + #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ(v) ((v) << 4) + #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ_MASK GENMASK(7, 4) + #define SUN4I_SPDIF_TXCHSTA1_SAMWORDLEN(v) ((v) << 1) + #define SUN4I_SPDIF_TXCHSTA1_MAXWORDLEN BIT(0) + +#define SUN4I_SPDIF_RXCHSTA0 (0x34) + #define SUN4I_SPDIF_RXCHSTA0_CLK(v) ((v) << 28) + #define SUN4I_SPDIF_RXCHSTA0_SAMFREQ(v) ((v) << 24) + #define SUN4I_SPDIF_RXCHSTA0_CHNUM(v) ((v) << 20) + #define SUN4I_SPDIF_RXCHSTA0_SRCNUM(v) ((v) << 16) + #define SUN4I_SPDIF_RXCHSTA0_CATACOD(v) ((v) << 8) + #define SUN4I_SPDIF_RXCHSTA0_MODE(v) ((v) << 6) + #define SUN4I_SPDIF_RXCHSTA0_EMPHASIS(v) ((v) << 3) + #define SUN4I_SPDIF_RXCHSTA0_CP BIT(2) + #define SUN4I_SPDIF_RXCHSTA0_AUDIO BIT(1) + #define SUN4I_SPDIF_RXCHSTA0_PRO BIT(0) + +#define SUN4I_SPDIF_RXCHSTA1 (0x38) + #define SUN4I_SPDIF_RXCHSTA1_CGMSA(v) ((v) << 8) + #define SUN4I_SPDIF_RXCHSTA1_ORISAMFREQ(v) ((v) << 4) + #define SUN4I_SPDIF_RXCHSTA1_SAMWORDLEN(v) ((v) << 1) + #define SUN4I_SPDIF_RXCHSTA1_MAXWORDLEN BIT(0) + +/* Defines for Sampling Frequency */ +#define SUN4I_SPDIF_SAMFREQ_44_1KHZ 0x0 +#define SUN4I_SPDIF_SAMFREQ_NOT_INDICATED 0x1 +#define SUN4I_SPDIF_SAMFREQ_48KHZ 0x2 +#define SUN4I_SPDIF_SAMFREQ_32KHZ 0x3 +#define SUN4I_SPDIF_SAMFREQ_22_05KHZ 0x4 +#define SUN4I_SPDIF_SAMFREQ_24KHZ 0x6 +#define SUN4I_SPDIF_SAMFREQ_88_2KHZ 0x8 +#define SUN4I_SPDIF_SAMFREQ_76_8KHZ 0x9 +#define SUN4I_SPDIF_SAMFREQ_96KHZ 0xa +#define SUN4I_SPDIF_SAMFREQ_176_4KHZ 0xc +#define SUN4I_SPDIF_SAMFREQ_192KHZ 0xe + +struct sun4i_spdif_dev { + struct platform_device *pdev; + struct clk *spdif_clk; + struct clk *apb_clk; + struct snd_soc_dai_driver cpu_dai_drv; + struct regmap *regmap; + struct snd_dmaengine_dai_dma_data dma_params_tx; +}; + +static void sun4i_spdif_configure(struct sun4i_spdif_dev *host) +{ + /* soft reset SPDIF */ + regmap_write(host->regmap, SUN4I_SPDIF_CTL, SUN4I_SPDIF_CTL_RESET); + + /* flush TX FIFO */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL, + SUN4I_SPDIF_FCTL_FTX, SUN4I_SPDIF_FCTL_FTX); + + /* clear TX counter */ + regmap_write(host->regmap, SUN4I_SPDIF_TXCNT, 0); +} + +static void sun4i_snd_txctrl_on(struct snd_pcm_substream *substream, + struct sun4i_spdif_dev *host) +{ + if (substream->runtime->channels == 1) + regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG, + SUN4I_SPDIF_TXCFG_SINGLEMOD, + SUN4I_SPDIF_TXCFG_SINGLEMOD); + + /* SPDIF TX ENABLE */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG, + SUN4I_SPDIF_TXCFG_TXEN, SUN4I_SPDIF_TXCFG_TXEN); + + /* DRQ ENABLE */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_INT, + SUN4I_SPDIF_INT_TXDRQEN, SUN4I_SPDIF_INT_TXDRQEN); + + /* Global enable */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL, + SUN4I_SPDIF_CTL_GEN, SUN4I_SPDIF_CTL_GEN); +} + +static void sun4i_snd_txctrl_off(struct snd_pcm_substream *substream, + struct sun4i_spdif_dev *host) +{ + /* SPDIF TX DISABLE */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG, + SUN4I_SPDIF_TXCFG_TXEN, 0); + + /* DRQ DISABLE */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_INT, + SUN4I_SPDIF_INT_TXDRQEN, 0); + + /* Global disable */ + regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL, + SUN4I_SPDIF_CTL_GEN, 0); +} + +static int sun4i_spdif_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(rtd->cpu_dai); + + if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) + return -EINVAL; + + sun4i_spdif_configure(host); + + return 0; +} + +static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *cpu_dai) +{ + int ret = 0; + int fmt; + unsigned long rate = params_rate(params); + u32 mclk_div = 0; + unsigned int mclk = 0; + u32 reg_val; + struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai); + struct platform_device *pdev = host->pdev; + + /* Add the PCM and raw data select interface */ + switch (params_channels(params)) { + case 1: /* PCM mode */ + case 2: + fmt = 0; + break; + case 4: /* raw data mode */ + fmt = SUN4I_SPDIF_TXCFG_NONAUDIO; + break; + default: + return -EINVAL; + } + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + fmt |= SUN4I_SPDIF_TXCFG_FMT16BIT; + break; + case SNDRV_PCM_FORMAT_S20_3LE: + fmt |= SUN4I_SPDIF_TXCFG_FMT20BIT; + break; + case SNDRV_PCM_FORMAT_S24_LE: + fmt |= SUN4I_SPDIF_TXCFG_FMT24BIT; + break; + default: + return -EINVAL; + } + + switch (rate) { + case 22050: + case 44100: + case 88200: + case 176400: + mclk = 22579200; + break; + case 24000: + case 32000: + case 48000: + case 96000: + case 192000: + mclk = 24576000; + break; + default: + return -EINVAL; + } + + ret = clk_set_rate(host->spdif_clk, mclk); + if (ret < 0) { + dev_err(&pdev->dev, + "Setting SPDIF clock rate for %d Hz failed!\n", mclk); + return ret; + } + + regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL, + SUN4I_SPDIF_FCTL_TXIM, SUN4I_SPDIF_FCTL_TXIM); + + switch (rate) { + case 22050: + case 24000: + mclk_div = 8; + break; + case 32000: + mclk_div = 6; + break; + case 44100: + case 48000: + mclk_div = 4; + break; + case 88200: + case 96000: + mclk_div = 2; + break; + case 176400: + case 192000: + mclk_div = 1; + break; + default: + return -EINVAL; + } + + reg_val = 0; + reg_val |= SUN4I_SPDIF_TXCFG_ASS; + reg_val |= fmt; /* set non audio and bit depth */ + reg_val |= SUN4I_SPDIF_TXCFG_CHSTMODE; + reg_val |= SUN4I_SPDIF_TXCFG_TXRATIO(mclk_div - 1); + regmap_write(host->regmap, SUN4I_SPDIF_TXCFG, reg_val); + + return 0; +} + +static int sun4i_spdif_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + int ret = 0; + struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai); + + if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) + return -EINVAL; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + sun4i_snd_txctrl_on(substream, host); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + sun4i_snd_txctrl_off(substream, host); + break; + + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int sun4i_spdif_soc_dai_probe(struct snd_soc_dai *dai) +{ + struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai); + + snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL); + return 0; +} + +static const struct snd_soc_dai_ops sun4i_spdif_dai_ops = { + .startup = sun4i_spdif_startup, + .trigger = sun4i_spdif_trigger, + .hw_params = sun4i_spdif_hw_params, +}; + +static const struct regmap_config sun4i_spdif_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = SUN4I_SPDIF_RXCHSTA1, +}; + +#define SUN4I_RATES SNDRV_PCM_RATE_8000_192000 + +#define SUN4I_FORMATS (SNDRV_PCM_FORMAT_S16_LE | \ + SNDRV_PCM_FORMAT_S20_3LE | \ + SNDRV_PCM_FORMAT_S24_LE) + +static struct snd_soc_dai_driver sun4i_spdif_dai = { + .playback = { + .channels_min = 1, + .channels_max = 2, + .rates = SUN4I_RATES, + .formats = SUN4I_FORMATS, + }, + .probe = sun4i_spdif_soc_dai_probe, + .ops = &sun4i_spdif_dai_ops, + .name = "spdif", +}; + +static const struct snd_soc_dapm_widget dit_widgets[] = { + SND_SOC_DAPM_OUTPUT("spdif-out"), +}; + +static const struct snd_soc_dapm_route dit_routes[] = { + { "spdif-out", NULL, "Playback" }, +}; + +static const struct of_device_id sun4i_spdif_of_match[] = { + { .compatible = "allwinner,sun4i-a10-spdif", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, sun4i_spdif_of_match); + +static const struct snd_soc_component_driver sun4i_spdif_component = { + .name = "sun4i-spdif", +}; + +static int sun4i_spdif_runtime_suspend(struct device *dev) +{ + struct sun4i_spdif_dev *host = dev_get_drvdata(dev); + + clk_disable_unprepare(host->spdif_clk); + clk_disable_unprepare(host->apb_clk); + + return 0; +} + +static int sun4i_spdif_runtime_resume(struct device *dev) +{ + struct sun4i_spdif_dev *host = dev_get_drvdata(dev); + + clk_prepare_enable(host->spdif_clk); + clk_prepare_enable(host->apb_clk); + + return 0; +} + +static int sun4i_spdif_probe(struct platform_device *pdev) +{ + struct sun4i_spdif_dev *host; + struct resource *res; + int ret; + void __iomem *base; + + dev_dbg(&pdev->dev, "Entered %s\n", __func__); + + host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL); + if (!host) + return -ENOMEM; + + host->pdev = pdev; + + /* Initialize this copy of the CPU DAI driver structure */ + memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai)); + host->cpu_dai_drv.name = dev_name(&pdev->dev); + + /* Get the addresses */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + host->regmap = devm_regmap_init_mmio(&pdev->dev, base, + &sun4i_spdif_regmap_config); + + /* Clocks */ + host->apb_clk = devm_clk_get(&pdev->dev, "apb"); + if (IS_ERR(host->apb_clk)) { + dev_err(&pdev->dev, "failed to get a apb clock.\n"); + return PTR_ERR(host->apb_clk); + } + + host->spdif_clk = devm_clk_get(&pdev->dev, "spdif"); + if (IS_ERR(host->spdif_clk)) { + dev_err(&pdev->dev, "failed to get a spdif clock.\n"); + ret = PTR_ERR(host->spdif_clk); + goto err_disable_apb_clk; + } + + host->dma_params_tx.addr = res->start + SUN4I_SPDIF_TXFIFO; + host->dma_params_tx.maxburst = 4; + host->dma_params_tx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + + platform_set_drvdata(pdev, host); + + ret = devm_snd_soc_register_component(&pdev->dev, + &sun4i_spdif_component, &sun4i_spdif_dai, 1); + if (ret) + goto err_disable_apb_clk; + + pm_runtime_enable(&pdev->dev); + if (!pm_runtime_enabled(&pdev->dev)) { + ret = sun4i_spdif_runtime_resume(&pdev->dev); + if (ret) + goto err_unregister; + } + + ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); + if (ret) + goto err_suspend; + return 0; +err_suspend: + if (!pm_runtime_status_suspended(&pdev->dev)) + sun4i_spdif_runtime_suspend(&pdev->dev); +err_unregister: + pm_runtime_disable(&pdev->dev); + snd_soc_unregister_component(&pdev->dev); +err_disable_apb_clk: + clk_disable_unprepare(host->apb_clk); + return ret; +} + +static int sun4i_spdif_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + sun4i_spdif_runtime_suspend(&pdev->dev); + + snd_soc_unregister_platform(&pdev->dev); + snd_soc_unregister_component(&pdev->dev); + + return 0; +} + +static const struct dev_pm_ops sun4i_spdif_pm = { + SET_RUNTIME_PM_OPS(sun4i_spdif_runtime_suspend, + sun4i_spdif_runtime_resume, NULL) +}; + +static struct platform_driver sun4i_spdif_driver = { + .driver = { + .name = "sun4i-spdif", + .of_match_table = of_match_ptr(sun4i_spdif_of_match), + .pm = &sun4i_spdif_pm, + }, + .probe = sun4i_spdif_probe, + .remove = sun4i_spdif_remove, +}; + +module_platform_driver(sun4i_spdif_driver); + +MODULE_AUTHOR("Marcus Cooper <codekipper@gmail.com>"); +MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>"); +MODULE_DESCRIPTION("Allwinner sun4i SPDIF SoC Interface"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:sun4i-spdif"); |