+++ /dev/null
-/* sound/soc/s3c24xx/s3c-pcm.c
- *
- * ALSA SoC Audio Layer - S3C PCM-Controller driver
- *
- * Copyright (c) 2009 Samsung Electronics Co. Ltd
- * Author: Jaswinder Singh <jassi.brar@samsung.com>
- * based upon I2S drivers by Ben Dooks.
- *
- * 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/init.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/clk.h>
-#include <linux/kernel.h>
-#include <linux/gpio.h>
-#include <linux/io.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/initval.h>
-#include <sound/soc.h>
-
-#include <plat/audio.h>
-#include <plat/dma.h>
-
-#include "s3c-dma.h"
-#include "s3c-pcm.h"
-
-static struct s3c2410_dma_client s3c_pcm_dma_client_out = {
- .name = "PCM Stereo out"
-};
-
-static struct s3c2410_dma_client s3c_pcm_dma_client_in = {
- .name = "PCM Stereo in"
-};
-
-static struct s3c_dma_params s3c_pcm_stereo_out[] = {
- [0] = {
- .client = &s3c_pcm_dma_client_out,
- .dma_size = 4,
- },
- [1] = {
- .client = &s3c_pcm_dma_client_out,
- .dma_size = 4,
- },
-};
-
-static struct s3c_dma_params s3c_pcm_stereo_in[] = {
- [0] = {
- .client = &s3c_pcm_dma_client_in,
- .dma_size = 4,
- },
- [1] = {
- .client = &s3c_pcm_dma_client_in,
- .dma_size = 4,
- },
-};
-
-static struct s3c_pcm_info s3c_pcm[2];
-
-static inline struct s3c_pcm_info *to_info(struct snd_soc_dai *cpu_dai)
-{
- return cpu_dai->private_data;
-}
-
-static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on)
-{
- void __iomem *regs = pcm->regs;
- u32 ctl, clkctl;
-
- clkctl = readl(regs + S3C_PCM_CLKCTL);
- ctl = readl(regs + S3C_PCM_CTL);
- ctl &= ~(S3C_PCM_CTL_TXDIPSTICK_MASK
- << S3C_PCM_CTL_TXDIPSTICK_SHIFT);
-
- if (on) {
- ctl |= S3C_PCM_CTL_TXDMA_EN;
- ctl |= S3C_PCM_CTL_TXFIFO_EN;
- ctl |= S3C_PCM_CTL_ENABLE;
- ctl |= (0x20<<S3C_PCM_CTL_TXDIPSTICK_SHIFT);
- clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
- } else {
- ctl &= ~S3C_PCM_CTL_TXDMA_EN;
- ctl &= ~S3C_PCM_CTL_TXFIFO_EN;
-
- if (!(ctl & S3C_PCM_CTL_RXFIFO_EN)) {
- ctl &= ~S3C_PCM_CTL_ENABLE;
- if (!pcm->idleclk)
- clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
- }
- }
-
- writel(clkctl, regs + S3C_PCM_CLKCTL);
- writel(ctl, regs + S3C_PCM_CTL);
-}
-
-static void s3c_pcm_snd_rxctrl(struct s3c_pcm_info *pcm, int on)
-{
- void __iomem *regs = pcm->regs;
- u32 ctl, clkctl;
-
- ctl = readl(regs + S3C_PCM_CTL);
- clkctl = readl(regs + S3C_PCM_CLKCTL);
-
- if (on) {
- ctl |= S3C_PCM_CTL_RXDMA_EN;
- ctl |= S3C_PCM_CTL_RXFIFO_EN;
- ctl |= S3C_PCM_CTL_ENABLE;
- clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
- } else {
- ctl &= ~S3C_PCM_CTL_RXDMA_EN;
- ctl &= ~S3C_PCM_CTL_RXFIFO_EN;
-
- if (!(ctl & S3C_PCM_CTL_TXFIFO_EN)) {
- ctl &= ~S3C_PCM_CTL_ENABLE;
- if (!pcm->idleclk)
- clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
- }
- }
-
- writel(clkctl, regs + S3C_PCM_CLKCTL);
- writel(ctl, regs + S3C_PCM_CTL);
-}
-
-static int s3c_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct s3c_pcm_info *pcm = to_info(rtd->dai->cpu_dai);
- unsigned long flags;
-
- dev_dbg(pcm->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(&pcm->lock, flags);
-
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- s3c_pcm_snd_rxctrl(pcm, 1);
- else
- s3c_pcm_snd_txctrl(pcm, 1);
-
- spin_unlock_irqrestore(&pcm->lock, flags);
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- spin_lock_irqsave(&pcm->lock, flags);
-
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- s3c_pcm_snd_rxctrl(pcm, 0);
- else
- s3c_pcm_snd_txctrl(pcm, 0);
-
- spin_unlock_irqrestore(&pcm->lock, flags);
- break;
-
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int s3c_pcm_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 snd_soc_dai_link *dai = rtd->dai;
- struct s3c_pcm_info *pcm = to_info(dai->cpu_dai);
- struct s3c_dma_params *dma_data;
- void __iomem *regs = pcm->regs;
- struct clk *clk;
- int sclk_div, sync_div;
- unsigned long flags;
- u32 clkctl;
-
- dev_dbg(pcm->dev, "Entered %s\n", __func__);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- dma_data = pcm->dma_playback;
- else
- dma_data = pcm->dma_capture;
-
- snd_soc_dai_set_dma_data(dai->cpu_dai, substream, dma_data);
-
- /* Strictly check for sample size */
- switch (params_format(params)) {
- case SNDRV_PCM_FORMAT_S16_LE:
- break;
- default:
- return -EINVAL;
- }
-
- spin_lock_irqsave(&pcm->lock, flags);
-
- /* Get hold of the PCMSOURCE_CLK */
- clkctl = readl(regs + S3C_PCM_CLKCTL);
- if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK)
- clk = pcm->pclk;
- else
- clk = pcm->cclk;
-
- /* Set the SCLK divider */
- sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs /
- params_rate(params) / 2 - 1;
-
- clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK
- << S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
- clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK)
- << S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
-
- /* Set the SYNC divider */
- sync_div = pcm->sclk_per_fs - 1;
-
- clkctl &= ~(S3C_PCM_CLKCTL_SYNCDIV_MASK
- << S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
- clkctl |= ((sync_div & S3C_PCM_CLKCTL_SYNCDIV_MASK)
- << S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
-
- writel(clkctl, regs + S3C_PCM_CLKCTL);
-
- spin_unlock_irqrestore(&pcm->lock, flags);
-
- dev_dbg(pcm->dev, "PCMSOURCE_CLK-%lu SCLK=%ufs SCLK_DIV=%d SYNC_DIV=%d\n",
- clk_get_rate(clk), pcm->sclk_per_fs,
- sclk_div, sync_div);
-
- return 0;
-}
-
-static int s3c_pcm_set_fmt(struct snd_soc_dai *cpu_dai,
- unsigned int fmt)
-{
- struct s3c_pcm_info *pcm = to_info(cpu_dai);
- void __iomem *regs = pcm->regs;
- unsigned long flags;
- int ret = 0;
- u32 ctl;
-
- dev_dbg(pcm->dev, "Entered %s\n", __func__);
-
- spin_lock_irqsave(&pcm->lock, flags);
-
- ctl = readl(regs + S3C_PCM_CTL);
-
- switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
- case SND_SOC_DAIFMT_NB_NF:
- /* Nothing to do, NB_NF by default */
- break;
- default:
- dev_err(pcm->dev, "Unsupported clock inversion!\n");
- ret = -EINVAL;
- goto exit;
- }
-
- switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS:
- /* Nothing to do, Master by default */
- break;
- default:
- dev_err(pcm->dev, "Unsupported master/slave format!\n");
- ret = -EINVAL;
- goto exit;
- }
-
- switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
- case SND_SOC_DAIFMT_CONT:
- pcm->idleclk = 1;
- break;
- case SND_SOC_DAIFMT_GATED:
- pcm->idleclk = 0;
- break;
- default:
- dev_err(pcm->dev, "Invalid Clock gating request!\n");
- ret = -EINVAL;
- goto exit;
- }
-
- switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_DSP_A:
- ctl |= S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
- ctl |= S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
- break;
- case SND_SOC_DAIFMT_DSP_B:
- ctl &= ~S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
- ctl &= ~S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
- break;
- default:
- dev_err(pcm->dev, "Unsupported data format!\n");
- ret = -EINVAL;
- goto exit;
- }
-
- writel(ctl, regs + S3C_PCM_CTL);
-
-exit:
- spin_unlock_irqrestore(&pcm->lock, flags);
-
- return ret;
-}
-
-static int s3c_pcm_set_clkdiv(struct snd_soc_dai *cpu_dai,
- int div_id, int div)
-{
- struct s3c_pcm_info *pcm = to_info(cpu_dai);
-
- switch (div_id) {
- case S3C_PCM_SCLK_PER_FS:
- pcm->sclk_per_fs = div;
- break;
-
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int s3c_pcm_set_sysclk(struct snd_soc_dai *cpu_dai,
- int clk_id, unsigned int freq, int dir)
-{
- struct s3c_pcm_info *pcm = to_info(cpu_dai);
- void __iomem *regs = pcm->regs;
- u32 clkctl = readl(regs + S3C_PCM_CLKCTL);
-
- switch (clk_id) {
- case S3C_PCM_CLKSRC_PCLK:
- clkctl |= S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
- break;
-
- case S3C_PCM_CLKSRC_MUX:
- clkctl &= ~S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
-
- if (clk_get_rate(pcm->cclk) != freq)
- clk_set_rate(pcm->cclk, freq);
-
- break;
-
- default:
- return -EINVAL;
- }
-
- writel(clkctl, regs + S3C_PCM_CLKCTL);
-
- return 0;
-}
-
-static struct snd_soc_dai_ops s3c_pcm_dai_ops = {
- .set_sysclk = s3c_pcm_set_sysclk,
- .set_clkdiv = s3c_pcm_set_clkdiv,
- .trigger = s3c_pcm_trigger,
- .hw_params = s3c_pcm_hw_params,
- .set_fmt = s3c_pcm_set_fmt,
-};
-
-#define S3C_PCM_RATES SNDRV_PCM_RATE_8000_96000
-
-#define S3C_PCM_DECLARE(n) \
-{ \
- .name = "samsung-pcm", \
- .id = (n), \
- .symmetric_rates = 1, \
- .ops = &s3c_pcm_dai_ops, \
- .playback = { \
- .channels_min = 2, \
- .channels_max = 2, \
- .rates = S3C_PCM_RATES, \
- .formats = SNDRV_PCM_FMTBIT_S16_LE, \
- }, \
- .capture = { \
- .channels_min = 2, \
- .channels_max = 2, \
- .rates = S3C_PCM_RATES, \
- .formats = SNDRV_PCM_FMTBIT_S16_LE, \
- }, \
-}
-
-struct snd_soc_dai s3c_pcm_dai[] = {
- S3C_PCM_DECLARE(0),
- S3C_PCM_DECLARE(1),
-};
-EXPORT_SYMBOL_GPL(s3c_pcm_dai);
-
-static __devinit int s3c_pcm_dev_probe(struct platform_device *pdev)
-{
- struct s3c_pcm_info *pcm;
- struct snd_soc_dai *dai;
- struct resource *mem_res, *dmatx_res, *dmarx_res;
- struct s3c_audio_pdata *pcm_pdata;
- int ret;
-
- /* Check for valid device index */
- if ((pdev->id < 0) || pdev->id >= ARRAY_SIZE(s3c_pcm)) {
- dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
- return -EINVAL;
- }
-
- pcm_pdata = pdev->dev.platform_data;
-
- /* Check for availability of necessary resource */
- dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!dmatx_res) {
- dev_err(&pdev->dev, "Unable to get PCM-TX dma resource\n");
- return -ENXIO;
- }
-
- dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!dmarx_res) {
- dev_err(&pdev->dev, "Unable to get PCM-RX 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 (pcm_pdata && pcm_pdata->cfg_gpio && pcm_pdata->cfg_gpio(pdev)) {
- dev_err(&pdev->dev, "Unable to configure gpio\n");
- return -EINVAL;
- }
-
- pcm = &s3c_pcm[pdev->id];
- pcm->dev = &pdev->dev;
-
- spin_lock_init(&pcm->lock);
-
- dai = &s3c_pcm_dai[pdev->id];
- dai->dev = &pdev->dev;
-
- /* Default is 128fs */
- pcm->sclk_per_fs = 128;
-
- pcm->cclk = clk_get(&pdev->dev, "audio-bus");
- if (IS_ERR(pcm->cclk)) {
- dev_err(&pdev->dev, "failed to get audio-bus\n");
- ret = PTR_ERR(pcm->cclk);
- goto err1;
- }
- clk_enable(pcm->cclk);
-
- /* record our pcm structure for later use in the callbacks */
- dai->private_data = pcm;
-
- if (!request_mem_region(mem_res->start,
- resource_size(mem_res), "samsung-pcm")) {
- dev_err(&pdev->dev, "Unable to request register region\n");
- ret = -EBUSY;
- goto err2;
- }
-
- pcm->regs = ioremap(mem_res->start, 0x100);
- if (pcm->regs == NULL) {
- dev_err(&pdev->dev, "cannot ioremap registers\n");
- ret = -ENXIO;
- goto err3;
- }
-
- pcm->pclk = clk_get(&pdev->dev, "pcm");
- if (IS_ERR(pcm->pclk)) {
- dev_err(&pdev->dev, "failed to get pcm_clock\n");
- ret = -ENOENT;
- goto err4;
- }
- clk_enable(pcm->pclk);
-
- ret = snd_soc_register_dai(dai);
- if (ret != 0) {
- dev_err(&pdev->dev, "failed to get pcm_clock\n");
- goto err5;
- }
-
- s3c_pcm_stereo_in[pdev->id].dma_addr = mem_res->start
- + S3C_PCM_RXFIFO;
- s3c_pcm_stereo_out[pdev->id].dma_addr = mem_res->start
- + S3C_PCM_TXFIFO;
-
- s3c_pcm_stereo_in[pdev->id].channel = dmarx_res->start;
- s3c_pcm_stereo_out[pdev->id].channel = dmatx_res->start;
-
- pcm->dma_capture = &s3c_pcm_stereo_in[pdev->id];
- pcm->dma_playback = &s3c_pcm_stereo_out[pdev->id];
-
- return 0;
-
-err5:
- clk_disable(pcm->pclk);
- clk_put(pcm->pclk);
-err4:
- iounmap(pcm->regs);
-err3:
- release_mem_region(mem_res->start, resource_size(mem_res));
-err2:
- clk_disable(pcm->cclk);
- clk_put(pcm->cclk);
-err1:
- return ret;
-}
-
-static __devexit int s3c_pcm_dev_remove(struct platform_device *pdev)
-{
- struct s3c_pcm_info *pcm = &s3c_pcm[pdev->id];
- struct resource *mem_res;
-
- iounmap(pcm->regs);
-
- mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(mem_res->start, resource_size(mem_res));
-
- clk_disable(pcm->cclk);
- clk_disable(pcm->pclk);
- clk_put(pcm->pclk);
- clk_put(pcm->cclk);
-
- return 0;
-}
-
-static struct platform_driver s3c_pcm_driver = {
- .probe = s3c_pcm_dev_probe,
- .remove = s3c_pcm_dev_remove,
- .driver = {
- .name = "samsung-pcm",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init s3c_pcm_init(void)
-{
- return platform_driver_register(&s3c_pcm_driver);
-}
-module_init(s3c_pcm_init);
-
-static void __exit s3c_pcm_exit(void)
-{
- platform_driver_unregister(&s3c_pcm_driver);
-}
-module_exit(s3c_pcm_exit);
-
-/* Module information */
-MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
-MODULE_DESCRIPTION("S3C PCM Controller Driver");
-MODULE_LICENSE("GPL");
projects / mv-sheeva.git / blobdiff