diff options
| -rw-r--r-- | sound/soc/s3c24xx/Kconfig | 4 | ||||
| -rw-r--r-- | sound/soc/s3c24xx/Makefile | 2 | ||||
| -rw-r--r-- | sound/soc/s3c24xx/spdif.c | 501 | ||||
| -rw-r--r-- | sound/soc/s3c24xx/spdif.h | 19 |
4 files changed, 526 insertions, 0 deletions
diff --git a/sound/soc/s3c24xx/Kconfig b/sound/soc/s3c24xx/Kconfig index 7d8235de549e..e2cba93446a5 100644 --- a/sound/soc/s3c24xx/Kconfig +++ b/sound/soc/s3c24xx/Kconfig @@ -36,6 +36,10 @@ config SND_S3C_SOC_AC97 tristate select SND_SOC_AC97_BUS +config SND_S5P_SOC_SPDIF + tristate + select SND_SOC_SPDIF + config SND_S3C24XX_SOC_NEO1973_WM8753 tristate "SoC I2S Audio support for NEO1973 - WM8753" depends on SND_S3C24XX_SOC && MACH_NEO1973_GTA01 diff --git a/sound/soc/s3c24xx/Makefile b/sound/soc/s3c24xx/Makefile index dd412a9e88c3..0a02735716de 100644 --- a/sound/soc/s3c24xx/Makefile +++ b/sound/soc/s3c24xx/Makefile @@ -7,6 +7,7 @@ snd-soc-s3c-ac97-objs := s3c-ac97.o snd-soc-s3c64xx-i2s-v4-objs := s3c64xx-i2s-v4.o snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o snd-soc-s3c-pcm-objs := s3c-pcm.o +snd-soc-samsung-spdif-objs := spdif.o obj-$(CONFIG_SND_S3C24XX_SOC) += snd-soc-s3c24xx.o obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o @@ -16,6 +17,7 @@ obj-$(CONFIG_SND_S3C64XX_SOC_I2S) += snd-soc-s3c64xx-i2s.o obj-$(CONFIG_SND_S3C64XX_SOC_I2S_V4) += snd-soc-s3c64xx-i2s-v4.o obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o obj-$(CONFIG_SND_S3C_SOC_PCM) += snd-soc-s3c-pcm.o +obj-$(CONFIG_SND_S5P_SOC_SPDIF) += snd-soc-samsung-spdif.o # S3C24XX Machine Support snd-soc-jive-wm8750-objs := jive_wm8750.o diff --git a/sound/soc/s3c24xx/spdif.c b/sound/soc/s3c24xx/spdif.c new file mode 100644 index 000000000000..ce554e9cabcc --- /dev/null +++ b/sound/soc/s3c24xx/spdif.c @@ -0,0 +1,501 @@ +/* sound/soc/s3c24xx/spdif.c + * + * ALSA SoC Audio Layer - Samsung S/PDIF Controller driver + * + * Copyright (c) 2010 Samsung Electronics Co. Ltd + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/io.h> + +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include <plat/audio.h> +#include <mach/dma.h> + +#include "s3c-dma.h" +#include "spdif.h" + +/* Registers */ +#define CLKCON 0x00 +#define CON 0x04 +#define BSTAS 0x08 +#define CSTAS 0x0C +#define DATA_OUTBUF 0x10 +#define DCNT 0x14 +#define BSTAS_S 0x18 +#define DCNT_S 0x1C + +#define CLKCTL_MASK 0x7 +#define CLKCTL_MCLK_EXT (0x1 << 2) +#define CLKCTL_PWR_ON (0x1 << 0) + +#define CON_MASK 0x3ffffff +#define CON_FIFO_TH_SHIFT 19 +#define CON_FIFO_TH_MASK (0x7 << 19) +#define CON_USERDATA_23RDBIT (0x1 << 12) + +#define CON_SW_RESET (0x1 << 5) + +#define CON_MCLKDIV_MASK (0x3 << 3) +#define CON_MCLKDIV_256FS (0x0 << 3) +#define CON_MCLKDIV_384FS (0x1 << 3) +#define CON_MCLKDIV_512FS (0x2 << 3) + +#define CON_PCM_MASK (0x3 << 1) +#define CON_PCM_16BIT (0x0 << 1) +#define CON_PCM_20BIT (0x1 << 1) +#define CON_PCM_24BIT (0x2 << 1) + +#define CON_PCM_DATA (0x1 << 0) + +#define CSTAS_MASK 0x3fffffff +#define CSTAS_SAMP_FREQ_MASK (0xF << 24) +#define CSTAS_SAMP_FREQ_44 (0x0 << 24) +#define CSTAS_SAMP_FREQ_48 (0x2 << 24) +#define CSTAS_SAMP_FREQ_32 (0x3 << 24) +#define CSTAS_SAMP_FREQ_96 (0xA << 24) + +#define CSTAS_CATEGORY_MASK (0xFF << 8) +#define CSTAS_CATEGORY_CODE_CDP (0x01 << 8) + +#define CSTAS_NO_COPYRIGHT (0x1 << 2) + +/** + * struct samsung_spdif_info - Samsung S/PDIF Controller information + * @lock: Spin lock for S/PDIF. + * @dev: The parent device passed to use from the probe. + * @regs: The pointer to the device register block. + * @clk_rate: Current clock rate for calcurate ratio. + * @pclk: The peri-clock pointer for spdif master operation. + * @sclk: The source clock pointer for making sync signals. + * @save_clkcon: Backup clkcon reg. in suspend. + * @save_con: Backup con reg. in suspend. + * @save_cstas: Backup cstas reg. in suspend. + * @dma_playback: DMA information for playback channel. + */ +struct samsung_spdif_info { + spinlock_t lock; + struct device *dev; + void __iomem *regs; + unsigned long clk_rate; + struct clk *pclk; + struct clk *sclk; + u32 saved_clkcon; + u32 saved_con; + u32 saved_cstas; + struct s3c_dma_params *dma_playback; +}; + +static struct s3c2410_dma_client spdif_dma_client_out = { + .name = "S/PDIF Stereo out", +}; + +static struct s3c_dma_params spdif_stereo_out; +static struct samsung_spdif_info spdif_info; + +static inline struct samsung_spdif_info *to_info(struct snd_soc_dai *cpu_dai) +{ + return snd_soc_dai_get_drvdata(cpu_dai); +} + +static void spdif_snd_txctrl(struct samsung_spdif_info *spdif, int on) +{ + void __iomem *regs = spdif->regs; + u32 clkcon; + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + clkcon = readl(regs + CLKCON) & CLKCTL_MASK; + if (on) + writel(clkcon | CLKCTL_PWR_ON, regs + CLKCON); + else + writel(clkcon & ~CLKCTL_PWR_ON, regs + CLKCON); +} + +static int spdif_set_sysclk(struct snd_soc_dai *cpu_dai, + int clk_id, unsigned int freq, int dir) +{ + struct samsung_spdif_info *spdif = to_info(cpu_dai); + u32 clkcon; + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + clkcon = readl(spdif->regs + CLKCON); + + if (clk_id == SND_SOC_SPDIF_INT_MCLK) + clkcon &= ~CLKCTL_MCLK_EXT; + else + clkcon |= CLKCTL_MCLK_EXT; + + writel(clkcon, spdif->regs + CLKCON); + + spdif->clk_rate = freq; + + return 0; +} + +static int spdif_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai); + unsigned long flags; + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + spin_lock_irqsave(&spdif->lock, flags); + spdif_snd_txctrl(spdif, 1); + spin_unlock_irqrestore(&spdif->lock, flags); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + spin_lock_irqsave(&spdif->lock, flags); + spdif_snd_txctrl(spdif, 0); + spin_unlock_irqrestore(&spdif->lock, flags); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int spdif_sysclk_ratios[] = { + 512, 384, 256, +}; + +static int spdif_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *socdai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai); + void __iomem *regs = spdif->regs; + struct s3c_dma_params *dma_data; + u32 con, clkcon, cstas; + unsigned long flags; + int i, ratio; + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + dma_data = spdif->dma_playback; + else { + dev_err(spdif->dev, "Capture is not supported\n"); + return -EINVAL; + } + + snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data); + + spin_lock_irqsave(&spdif->lock, flags); + + con = readl(regs + CON) & CON_MASK; + cstas = readl(regs + CSTAS) & CSTAS_MASK; + clkcon = readl(regs + CLKCON) & CLKCTL_MASK; + + con &= ~CON_FIFO_TH_MASK; + con |= (0x7 << CON_FIFO_TH_SHIFT); + con |= CON_USERDATA_23RDBIT; + con |= CON_PCM_DATA; + + con &= ~CON_PCM_MASK; + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + con |= CON_PCM_16BIT; + break; + default: + dev_err(spdif->dev, "Unsupported data size.\n"); + goto err; + } + + ratio = spdif->clk_rate / params_rate(params); + for (i = 0; i < ARRAY_SIZE(spdif_sysclk_ratios); i++) + if (ratio == spdif_sysclk_ratios[i]) + break; + if (i == ARRAY_SIZE(spdif_sysclk_ratios)) { + dev_err(spdif->dev, "Invalid clock ratio %ld/%d\n", + spdif->clk_rate, params_rate(params)); + goto err; + } + + con &= ~CON_MCLKDIV_MASK; + switch (ratio) { + case 256: + con |= CON_MCLKDIV_256FS; + break; + case 384: + con |= CON_MCLKDIV_384FS; + break; + case 512: + con |= CON_MCLKDIV_512FS; + break; + } + + cstas &= ~CSTAS_SAMP_FREQ_MASK; + switch (params_rate(params)) { + case 44100: + cstas |= CSTAS_SAMP_FREQ_44; + break; + case 48000: + cstas |= CSTAS_SAMP_FREQ_48; + break; + case 32000: + cstas |= CSTAS_SAMP_FREQ_32; + break; + case 96000: + cstas |= CSTAS_SAMP_FREQ_96; + break; + default: + dev_err(spdif->dev, "Invalid sampling rate %d\n", + params_rate(params)); + goto err; + } + + cstas &= ~CSTAS_CATEGORY_MASK; + cstas |= CSTAS_CATEGORY_CODE_CDP; + cstas |= CSTAS_NO_COPYRIGHT; + + writel(con, regs + CON); + writel(cstas, regs + CSTAS); + writel(clkcon, regs + CLKCON); + + spin_unlock_irqrestore(&spdif->lock, flags); + + return 0; +err: + spin_unlock_irqrestore(&spdif->lock, flags); + return -EINVAL; +} + +static void spdif_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct samsung_spdif_info *spdif = to_info(rtd->cpu_dai); + void __iomem *regs = spdif->regs; + u32 con, clkcon; + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + con = readl(regs + CON) & CON_MASK; + clkcon = readl(regs + CLKCON) & CLKCTL_MASK; + + writel(con | CON_SW_RESET, regs + CON); + cpu_relax(); + + writel(clkcon & ~CLKCTL_PWR_ON, regs + CLKCON); +} + +#ifdef CONFIG_PM +static int spdif_suspend(struct snd_soc_dai *cpu_dai) +{ + struct samsung_spdif_info *spdif = to_info(cpu_dai); + u32 con = spdif->saved_con; + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + spdif->saved_clkcon = readl(spdif->regs + CLKCON) & CLKCTL_MASK; + spdif->saved_con = readl(spdif->regs + CON) & CON_MASK; + spdif->saved_cstas = readl(spdif->regs + CSTAS) & CSTAS_MASK; + + writel(con | CON_SW_RESET, spdif->regs + CON); + cpu_relax(); + + return 0; +} + +static int spdif_resume(struct snd_soc_dai *cpu_dai) +{ + struct samsung_spdif_info *spdif = to_info(cpu_dai); + + dev_dbg(spdif->dev, "Entered %s\n", __func__); + + writel(spdif->saved_clkcon, spdif->regs + CLKCON); + writel(spdif->saved_con, spdif->regs + CON); + writel(spdif->saved_cstas, spdif->regs + CSTAS); + + return 0; +} +#else +#define spdif_suspend NULL +#define spdif_resume NULL +#endif + +static struct snd_soc_dai_ops spdif_dai_ops = { + .set_sysclk = spdif_set_sysclk, + .trigger = spdif_trigger, + .hw_params = spdif_hw_params, + .shutdown = spdif_shutdown, +}; + +struct snd_soc_dai_driver samsung_spdif_dai = { + .name = "samsung-spdif", + .playback = { + .stream_name = "S/PDIF Playback", + .channels_min = 2, + .channels_max = 2, + .rates = (SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000), + .formats = SNDRV_PCM_FMTBIT_S16_LE, }, + .ops = &spdif_dai_ops, + .suspend = spdif_suspend, + .resume = spdif_resume, +}; + +static __devinit int spdif_probe(struct platform_device *pdev) +{ + struct s3c_audio_pdata *spdif_pdata; + struct resource *mem_res, *dma_res; + struct samsung_spdif_info *spdif; + int ret; + + spdif_pdata = pdev->dev.platform_data; + + dev_dbg(&pdev->dev, "Entered %s\n", __func__); + + dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (!dma_res) { + dev_err(&pdev->dev, "Unable to get dma resource.\n"); + return -ENXIO; + } + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem_res) { + dev_err(&pdev->dev, "Unable to get register resource.\n"); + return -ENXIO; + } + + if (spdif_pdata && spdif_pdata->cfg_gpio + && spdif_pdata->cfg_gpio(pdev)) { + dev_err(&pdev->dev, "Unable to configure GPIO pins\n"); + return -EINVAL; + } + + spdif = &spdif_info; + spdif->dev = &pdev->dev; + + spin_lock_init(&spdif->lock); + + spdif->pclk = clk_get(&pdev->dev, "spdif"); + if (IS_ERR(spdif->pclk)) { + dev_err(&pdev->dev, "failed to get peri-clock\n"); + ret = -ENOENT; + goto err0; + } + clk_enable(spdif->pclk); + + spdif->sclk = clk_get(&pdev->dev, "sclk_spdif"); + if (IS_ERR(spdif->sclk)) { + dev_err(&pdev->dev, "failed to get internal source clock\n"); + ret = -ENOENT; + goto err1; + } + clk_enable(spdif->sclk); + + /* Request S/PDIF Register's memory region */ + if (!request_mem_region(mem_res->start, + resource_size(mem_res), "samsung-spdif")) { + dev_err(&pdev->dev, "Unable to request register region\n"); + ret = -EBUSY; + goto err2; + } + + spdif->regs = ioremap(mem_res->start, 0x100); + if (spdif->regs == NULL) { + dev_err(&pdev->dev, "Cannot ioremap registers\n"); + ret = -ENXIO; + goto err3; + } + + dev_set_drvdata(&pdev->dev, spdif); + + ret = snd_soc_register_dai(&pdev->dev, &samsung_spdif_dai); + if (ret != 0) { + dev_err(&pdev->dev, "fail to register dai\n"); + goto err4; + } + + spdif_stereo_out.dma_size = 2; + spdif_stereo_out.client = &spdif_dma_client_out; + spdif_stereo_out.dma_addr = mem_res->start + DATA_OUTBUF; + spdif_stereo_out.channel = dma_res->start; + + spdif->dma_playback = &spdif_stereo_out; + + return 0; + +err4: + iounmap(spdif->regs); +err3: + release_mem_region(mem_res->start, resource_size(mem_res)); +err2: + clk_disable(spdif->sclk); + clk_put(spdif->sclk); +err1: + clk_disable(spdif->pclk); + clk_put(spdif->pclk); +err0: + return ret; +} + +static __devexit int spdif_remove(struct platform_device *pdev) +{ + struct samsung_spdif_info *spdif = &spdif_info; + struct resource *mem_res; + + snd_soc_unregister_dai(&pdev->dev); + + iounmap(spdif->regs); + + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (mem_res) + release_mem_region(mem_res->start, resource_size(mem_res)); + + clk_disable(spdif->sclk); + clk_put(spdif->sclk); + clk_disable(spdif->pclk); + clk_put(spdif->pclk); + + return 0; +} + +static struct platform_driver samsung_spdif_driver = { + .probe = spdif_probe, + .remove = spdif_remove, + .driver = { + .name = "samsung-spdif", + .owner = THIS_MODULE, + }, +}; + +static int __init spdif_init(void) +{ + return platform_driver_register(&samsung_spdif_driver); +} +module_init(spdif_init); + +static void __exit spdif_exit(void) +{ + platform_driver_unregister(&samsung_spdif_driver); +} +module_exit(spdif_exit); + +MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>"); +MODULE_DESCRIPTION("Samsung S/PDIF Controller Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:samsung-spdif"); diff --git a/sound/soc/s3c24xx/spdif.h b/sound/soc/s3c24xx/spdif.h new file mode 100644 index 000000000000..3ed55592710f --- /dev/null +++ b/sound/soc/s3c24xx/spdif.h @@ -0,0 +1,19 @@ +/* sound/soc/s3c24xx/spdif.h + * + * ALSA SoC Audio Layer - Samsung S/PDIF Controller driver + * + * Copyright (c) 2010 Samsung Electronics Co. Ltd + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __SND_SOC_SAMSUNG_SPDIF_H +#define __SND_SOC_SAMSUNG_SPDIF_H __FILE__ + +#define SND_SOC_SPDIF_INT_MCLK 0 +#define SND_SOC_SPDIF_EXT_MCLK 1 + +#endif /* __SND_SOC_SAMSUNG_SPDIF_H */ |