59cdd9bc05
String constants that are continued on subsequent lines with \ are not good. Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
552 lines
12 KiB
C
552 lines
12 KiB
C
/* sound/soc/s3c24xx/s3c-pcm.c
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*
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* ALSA SoC Audio Layer - S3C PCM-Controller driver
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*
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* Copyright (c) 2009 Samsung Electronics Co. Ltd
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* Author: Jaswinder Singh <jassi.brar@samsung.com>
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* based upon I2S drivers by Ben Dooks.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <plat/audio.h>
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#include <plat/dma.h>
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#include "s3c-dma.h"
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#include "s3c-pcm.h"
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static struct s3c2410_dma_client s3c_pcm_dma_client_out = {
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.name = "PCM Stereo out"
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};
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static struct s3c2410_dma_client s3c_pcm_dma_client_in = {
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.name = "PCM Stereo in"
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};
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static struct s3c_dma_params s3c_pcm_stereo_out[] = {
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[0] = {
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.client = &s3c_pcm_dma_client_out,
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.dma_size = 4,
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},
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[1] = {
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.client = &s3c_pcm_dma_client_out,
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.dma_size = 4,
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},
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};
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static struct s3c_dma_params s3c_pcm_stereo_in[] = {
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[0] = {
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.client = &s3c_pcm_dma_client_in,
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.dma_size = 4,
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},
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[1] = {
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.client = &s3c_pcm_dma_client_in,
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.dma_size = 4,
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},
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};
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static struct s3c_pcm_info s3c_pcm[2];
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static inline struct s3c_pcm_info *to_info(struct snd_soc_dai *cpu_dai)
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{
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return cpu_dai->private_data;
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}
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static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on)
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{
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void __iomem *regs = pcm->regs;
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u32 ctl, clkctl;
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clkctl = readl(regs + S3C_PCM_CLKCTL);
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ctl = readl(regs + S3C_PCM_CTL);
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ctl &= ~(S3C_PCM_CTL_TXDIPSTICK_MASK
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<< S3C_PCM_CTL_TXDIPSTICK_SHIFT);
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if (on) {
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ctl |= S3C_PCM_CTL_TXDMA_EN;
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ctl |= S3C_PCM_CTL_TXFIFO_EN;
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ctl |= S3C_PCM_CTL_ENABLE;
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ctl |= (0x20<<S3C_PCM_CTL_TXDIPSTICK_SHIFT);
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clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
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} else {
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ctl &= ~S3C_PCM_CTL_TXDMA_EN;
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ctl &= ~S3C_PCM_CTL_TXFIFO_EN;
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if (!(ctl & S3C_PCM_CTL_RXFIFO_EN)) {
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ctl &= ~S3C_PCM_CTL_ENABLE;
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if (!pcm->idleclk)
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clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
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}
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}
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writel(clkctl, regs + S3C_PCM_CLKCTL);
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writel(ctl, regs + S3C_PCM_CTL);
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}
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static void s3c_pcm_snd_rxctrl(struct s3c_pcm_info *pcm, int on)
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{
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void __iomem *regs = pcm->regs;
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u32 ctl, clkctl;
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ctl = readl(regs + S3C_PCM_CTL);
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clkctl = readl(regs + S3C_PCM_CLKCTL);
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if (on) {
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ctl |= S3C_PCM_CTL_RXDMA_EN;
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ctl |= S3C_PCM_CTL_RXFIFO_EN;
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ctl |= S3C_PCM_CTL_ENABLE;
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clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
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} else {
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ctl &= ~S3C_PCM_CTL_RXDMA_EN;
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ctl &= ~S3C_PCM_CTL_RXFIFO_EN;
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if (!(ctl & S3C_PCM_CTL_TXFIFO_EN)) {
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ctl &= ~S3C_PCM_CTL_ENABLE;
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if (!pcm->idleclk)
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clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
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}
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}
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writel(clkctl, regs + S3C_PCM_CLKCTL);
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writel(ctl, regs + S3C_PCM_CTL);
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}
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static int s3c_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct s3c_pcm_info *pcm = to_info(rtd->dai->cpu_dai);
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unsigned long flags;
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dev_dbg(pcm->dev, "Entered %s\n", __func__);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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spin_lock_irqsave(&pcm->lock, flags);
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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s3c_pcm_snd_rxctrl(pcm, 1);
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else
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s3c_pcm_snd_txctrl(pcm, 1);
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spin_unlock_irqrestore(&pcm->lock, flags);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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spin_lock_irqsave(&pcm->lock, flags);
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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s3c_pcm_snd_rxctrl(pcm, 0);
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else
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s3c_pcm_snd_txctrl(pcm, 0);
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spin_unlock_irqrestore(&pcm->lock, flags);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int s3c_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *socdai)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai_link *dai = rtd->dai;
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struct s3c_pcm_info *pcm = to_info(dai->cpu_dai);
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void __iomem *regs = pcm->regs;
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struct clk *clk;
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int sclk_div, sync_div;
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unsigned long flags;
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u32 clkctl;
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dev_dbg(pcm->dev, "Entered %s\n", __func__);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dai->cpu_dai->dma_data = pcm->dma_playback;
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else
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dai->cpu_dai->dma_data = pcm->dma_capture;
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/* Strictly check for sample size */
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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break;
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default:
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return -EINVAL;
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}
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spin_lock_irqsave(&pcm->lock, flags);
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/* Get hold of the PCMSOURCE_CLK */
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clkctl = readl(regs + S3C_PCM_CLKCTL);
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if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK)
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clk = pcm->pclk;
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else
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clk = pcm->cclk;
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/* Set the SCLK divider */
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sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs /
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params_rate(params) / 2 - 1;
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clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK
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<< S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
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clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK)
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<< S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
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/* Set the SYNC divider */
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sync_div = pcm->sclk_per_fs - 1;
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clkctl &= ~(S3C_PCM_CLKCTL_SYNCDIV_MASK
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<< S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
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clkctl |= ((sync_div & S3C_PCM_CLKCTL_SYNCDIV_MASK)
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<< S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
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writel(clkctl, regs + S3C_PCM_CLKCTL);
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spin_unlock_irqrestore(&pcm->lock, flags);
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dev_dbg(pcm->dev, "PCMSOURCE_CLK-%lu SCLK=%ufs SCLK_DIV=%d SYNC_DIV=%d\n",
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clk_get_rate(clk), pcm->sclk_per_fs,
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sclk_div, sync_div);
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return 0;
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}
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static int s3c_pcm_set_fmt(struct snd_soc_dai *cpu_dai,
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unsigned int fmt)
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{
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struct s3c_pcm_info *pcm = to_info(cpu_dai);
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void __iomem *regs = pcm->regs;
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unsigned long flags;
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int ret = 0;
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u32 ctl;
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dev_dbg(pcm->dev, "Entered %s\n", __func__);
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spin_lock_irqsave(&pcm->lock, flags);
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ctl = readl(regs + S3C_PCM_CTL);
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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/* Nothing to do, NB_NF by default */
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break;
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default:
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dev_err(pcm->dev, "Unsupported clock inversion!\n");
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ret = -EINVAL;
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goto exit;
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}
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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/* Nothing to do, Master by default */
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break;
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default:
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dev_err(pcm->dev, "Unsupported master/slave format!\n");
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ret = -EINVAL;
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goto exit;
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}
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switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
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case SND_SOC_DAIFMT_CONT:
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pcm->idleclk = 1;
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break;
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case SND_SOC_DAIFMT_GATED:
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pcm->idleclk = 0;
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break;
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default:
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dev_err(pcm->dev, "Invalid Clock gating request!\n");
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ret = -EINVAL;
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goto exit;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_DSP_A:
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ctl |= S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
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ctl |= S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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ctl &= ~S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
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ctl &= ~S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
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break;
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default:
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dev_err(pcm->dev, "Unsupported data format!\n");
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ret = -EINVAL;
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goto exit;
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}
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writel(ctl, regs + S3C_PCM_CTL);
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exit:
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spin_unlock_irqrestore(&pcm->lock, flags);
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return ret;
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}
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static int s3c_pcm_set_clkdiv(struct snd_soc_dai *cpu_dai,
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int div_id, int div)
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{
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struct s3c_pcm_info *pcm = to_info(cpu_dai);
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switch (div_id) {
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case S3C_PCM_SCLK_PER_FS:
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pcm->sclk_per_fs = div;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int s3c_pcm_set_sysclk(struct snd_soc_dai *cpu_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct s3c_pcm_info *pcm = to_info(cpu_dai);
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void __iomem *regs = pcm->regs;
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u32 clkctl = readl(regs + S3C_PCM_CLKCTL);
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switch (clk_id) {
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case S3C_PCM_CLKSRC_PCLK:
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clkctl |= S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
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break;
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case S3C_PCM_CLKSRC_MUX:
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clkctl &= ~S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
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if (clk_get_rate(pcm->cclk) != freq)
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clk_set_rate(pcm->cclk, freq);
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break;
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default:
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return -EINVAL;
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}
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writel(clkctl, regs + S3C_PCM_CLKCTL);
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return 0;
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}
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static struct snd_soc_dai_ops s3c_pcm_dai_ops = {
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.set_sysclk = s3c_pcm_set_sysclk,
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.set_clkdiv = s3c_pcm_set_clkdiv,
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.trigger = s3c_pcm_trigger,
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.hw_params = s3c_pcm_hw_params,
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.set_fmt = s3c_pcm_set_fmt,
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};
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#define S3C_PCM_RATES SNDRV_PCM_RATE_8000_96000
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#define S3C_PCM_DECLARE(n) \
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{ \
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.name = "samsung-pcm", \
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.id = (n), \
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.symmetric_rates = 1, \
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.ops = &s3c_pcm_dai_ops, \
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.playback = { \
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.channels_min = 2, \
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.channels_max = 2, \
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.rates = S3C_PCM_RATES, \
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.formats = SNDRV_PCM_FMTBIT_S16_LE, \
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}, \
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.capture = { \
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.channels_min = 2, \
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.channels_max = 2, \
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.rates = S3C_PCM_RATES, \
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.formats = SNDRV_PCM_FMTBIT_S16_LE, \
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}, \
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}
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struct snd_soc_dai s3c_pcm_dai[] = {
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S3C_PCM_DECLARE(0),
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S3C_PCM_DECLARE(1),
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};
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EXPORT_SYMBOL_GPL(s3c_pcm_dai);
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static __devinit int s3c_pcm_dev_probe(struct platform_device *pdev)
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{
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struct s3c_pcm_info *pcm;
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struct snd_soc_dai *dai;
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struct resource *mem_res, *dmatx_res, *dmarx_res;
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struct s3c_audio_pdata *pcm_pdata;
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int ret;
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/* Check for valid device index */
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if ((pdev->id < 0) || pdev->id >= ARRAY_SIZE(s3c_pcm)) {
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dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
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return -EINVAL;
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}
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pcm_pdata = pdev->dev.platform_data;
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/* Check for availability of necessary resource */
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dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!dmatx_res) {
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dev_err(&pdev->dev, "Unable to get PCM-TX dma resource\n");
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return -ENXIO;
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}
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dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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if (!dmarx_res) {
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dev_err(&pdev->dev, "Unable to get PCM-RX dma resource\n");
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return -ENXIO;
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}
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mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!mem_res) {
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dev_err(&pdev->dev, "Unable to get register resource\n");
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return -ENXIO;
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}
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if (pcm_pdata && pcm_pdata->cfg_gpio && pcm_pdata->cfg_gpio(pdev)) {
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dev_err(&pdev->dev, "Unable to configure gpio\n");
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return -EINVAL;
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}
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pcm = &s3c_pcm[pdev->id];
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pcm->dev = &pdev->dev;
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spin_lock_init(&pcm->lock);
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dai = &s3c_pcm_dai[pdev->id];
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dai->dev = &pdev->dev;
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/* Default is 128fs */
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pcm->sclk_per_fs = 128;
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pcm->cclk = clk_get(&pdev->dev, "audio-bus");
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if (IS_ERR(pcm->cclk)) {
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dev_err(&pdev->dev, "failed to get audio-bus\n");
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ret = PTR_ERR(pcm->cclk);
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goto err1;
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}
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clk_enable(pcm->cclk);
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/* record our pcm structure for later use in the callbacks */
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dai->private_data = pcm;
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if (!request_mem_region(mem_res->start,
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resource_size(mem_res), "samsung-pcm")) {
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dev_err(&pdev->dev, "Unable to request register region\n");
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ret = -EBUSY;
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goto err2;
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}
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pcm->regs = ioremap(mem_res->start, 0x100);
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if (pcm->regs == NULL) {
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dev_err(&pdev->dev, "cannot ioremap registers\n");
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ret = -ENXIO;
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goto err3;
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}
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pcm->pclk = clk_get(&pdev->dev, "pcm");
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if (IS_ERR(pcm->pclk)) {
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dev_err(&pdev->dev, "failed to get pcm_clock\n");
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ret = -ENOENT;
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goto err4;
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}
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clk_enable(pcm->pclk);
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ret = snd_soc_register_dai(dai);
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if (ret != 0) {
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dev_err(&pdev->dev, "failed to get pcm_clock\n");
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goto err5;
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}
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s3c_pcm_stereo_in[pdev->id].dma_addr = mem_res->start
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+ S3C_PCM_RXFIFO;
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s3c_pcm_stereo_out[pdev->id].dma_addr = mem_res->start
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+ S3C_PCM_TXFIFO;
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s3c_pcm_stereo_in[pdev->id].channel = dmarx_res->start;
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s3c_pcm_stereo_out[pdev->id].channel = dmatx_res->start;
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|
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");
|