diff options
Diffstat (limited to 'sound/soc/s3c24xx/spdif.c')
| -rw-r--r-- | sound/soc/s3c24xx/spdif.c | 501 |
1 files changed, 0 insertions, 501 deletions
diff --git a/sound/soc/s3c24xx/spdif.c b/sound/soc/s3c24xx/spdif.c deleted file mode 100644 index dc85df32ebf2..000000000000 --- a/sound/soc/s3c24xx/spdif.c +++ /dev/null @@ -1,501 +0,0 @@ -/* 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 "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"); |