503 lines
13 KiB
C
503 lines
13 KiB
C
/*
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* kirkwood-i2s.c
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*
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* (c) 2010 Arnaud Patard <apatard@mandriva.com>
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* (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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/platform_device.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/mbus.h>
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#include <linux/delay.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <plat/audio.h>
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#include "kirkwood.h"
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#define DRV_NAME "kirkwood-i2s"
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#define KIRKWOOD_I2S_RATES \
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(SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
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#define KIRKWOOD_I2S_FORMATS \
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(SNDRV_PCM_FMTBIT_S16_LE | \
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SNDRV_PCM_FMTBIT_S24_LE | \
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SNDRV_PCM_FMTBIT_S32_LE)
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static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
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unsigned int fmt)
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{
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struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
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unsigned long mask;
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unsigned long value;
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_RIGHT_J:
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mask = KIRKWOOD_I2S_CTL_RJ;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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mask = KIRKWOOD_I2S_CTL_LJ;
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break;
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case SND_SOC_DAIFMT_I2S:
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mask = KIRKWOOD_I2S_CTL_I2S;
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break;
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default:
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return -EINVAL;
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}
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/*
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* Set same format for playback and record
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* This avoids some troubles.
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*/
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value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
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value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
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value |= mask;
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writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
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value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
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value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
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value |= mask;
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writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
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return 0;
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}
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static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
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{
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unsigned long value;
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value = KIRKWOOD_DCO_CTL_OFFSET_0;
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switch (rate) {
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default:
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case 44100:
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value |= KIRKWOOD_DCO_CTL_FREQ_11;
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break;
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case 48000:
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value |= KIRKWOOD_DCO_CTL_FREQ_12;
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break;
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case 96000:
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value |= KIRKWOOD_DCO_CTL_FREQ_24;
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break;
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}
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writel(value, io + KIRKWOOD_DCO_CTL);
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/* wait for dco locked */
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do {
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cpu_relax();
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value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
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value &= KIRKWOOD_DCO_SPCR_STATUS;
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} while (value == 0);
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}
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static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
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snd_soc_dai_set_dma_data(dai, substream, priv);
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return 0;
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}
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static int kirkwood_i2s_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 *dai)
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{
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struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
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unsigned int i2s_reg, reg;
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unsigned long i2s_value, value;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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i2s_reg = KIRKWOOD_I2S_PLAYCTL;
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reg = KIRKWOOD_PLAYCTL;
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} else {
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i2s_reg = KIRKWOOD_I2S_RECCTL;
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reg = KIRKWOOD_RECCTL;
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}
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/* set dco conf */
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kirkwood_set_dco(priv->io, params_rate(params));
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i2s_value = readl(priv->io+i2s_reg);
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i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
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value = readl(priv->io+reg);
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value &= ~KIRKWOOD_PLAYCTL_SIZE_MASK;
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/*
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* Size settings in play/rec i2s control regs and play/rec control
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* regs must be the same.
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*/
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
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value |= KIRKWOOD_PLAYCTL_SIZE_16_C;
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break;
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/*
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* doesn't work... S20_3LE != kirkwood 20bit format ?
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*
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case SNDRV_PCM_FORMAT_S20_3LE:
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i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
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value |= KIRKWOOD_PLAYCTL_SIZE_20;
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break;
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*/
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case SNDRV_PCM_FORMAT_S24_LE:
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i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
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value |= KIRKWOOD_PLAYCTL_SIZE_24;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
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value |= KIRKWOOD_PLAYCTL_SIZE_32;
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break;
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default:
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return -EINVAL;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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value &= ~KIRKWOOD_PLAYCTL_MONO_MASK;
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if (params_channels(params) == 1)
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value |= KIRKWOOD_PLAYCTL_MONO_BOTH;
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else
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value |= KIRKWOOD_PLAYCTL_MONO_OFF;
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}
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writel(i2s_value, priv->io+i2s_reg);
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writel(value, priv->io+reg);
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return 0;
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}
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static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)
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{
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struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
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unsigned long value;
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/*
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* specs says KIRKWOOD_PLAYCTL must be read 2 times before
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* changing it. So read 1 time here and 1 later.
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*/
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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/* stop audio, enable interrupts */
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value |= KIRKWOOD_PLAYCTL_PAUSE;
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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value = readl(priv->io + KIRKWOOD_INT_MASK);
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value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
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writel(value, priv->io + KIRKWOOD_INT_MASK);
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/* configure audio & enable i2s playback */
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
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value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE
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| KIRKWOOD_PLAYCTL_SPDIF_EN);
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if (priv->burst == 32)
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value |= KIRKWOOD_PLAYCTL_BURST_32;
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else
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value |= KIRKWOOD_PLAYCTL_BURST_128;
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value |= KIRKWOOD_PLAYCTL_I2S_EN;
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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/* stop audio, disable interrupts */
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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value = readl(priv->io + KIRKWOOD_INT_MASK);
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value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
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writel(value, priv->io + KIRKWOOD_INT_MASK);
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/* disable all playbacks */
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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break;
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE);
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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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 kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)
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{
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struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
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unsigned long value;
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value = readl(priv->io + KIRKWOOD_RECCTL);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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/* stop audio, enable interrupts */
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value |= KIRKWOOD_RECCTL_PAUSE;
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writel(value, priv->io + KIRKWOOD_RECCTL);
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value = readl(priv->io + KIRKWOOD_INT_MASK);
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value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
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writel(value, priv->io + KIRKWOOD_INT_MASK);
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/* configure audio & enable i2s record */
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value &= ~KIRKWOOD_RECCTL_BURST_MASK;
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value &= ~KIRKWOOD_RECCTL_MONO;
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value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE
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| KIRKWOOD_RECCTL_SPDIF_EN);
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if (priv->burst == 32)
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value |= KIRKWOOD_RECCTL_BURST_32;
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else
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value |= KIRKWOOD_RECCTL_BURST_128;
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value |= KIRKWOOD_RECCTL_I2S_EN;
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writel(value, priv->io + KIRKWOOD_RECCTL);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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/* stop audio, disable interrupts */
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
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writel(value, priv->io + KIRKWOOD_RECCTL);
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value = readl(priv->io + KIRKWOOD_INT_MASK);
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value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
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writel(value, priv->io + KIRKWOOD_INT_MASK);
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/* disable all records */
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
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writel(value, priv->io + KIRKWOOD_RECCTL);
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
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writel(value, priv->io + KIRKWOOD_RECCTL);
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break;
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
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writel(value, priv->io + KIRKWOOD_RECCTL);
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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 kirkwood_i2s_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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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return kirkwood_i2s_play_trigger(substream, cmd, dai);
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else
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return kirkwood_i2s_rec_trigger(substream, cmd, dai);
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return 0;
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}
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static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
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{
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struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
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unsigned long value;
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unsigned int reg_data;
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/* put system in a "safe" state : */
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/* disable audio interrupts */
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writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
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writel(0, priv->io + KIRKWOOD_INT_MASK);
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reg_data = readl(priv->io + 0x1200);
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reg_data &= (~(0x333FF8));
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reg_data |= 0x111D18;
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writel(reg_data, priv->io + 0x1200);
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msleep(500);
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reg_data = readl(priv->io + 0x1200);
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reg_data &= (~(0x333FF8));
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reg_data |= 0x111D18;
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writel(reg_data, priv->io + 0x1200);
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/* disable playback/record */
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value = readl(priv->io + KIRKWOOD_PLAYCTL);
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value &= ~(KIRKWOOD_PLAYCTL_I2S_EN|KIRKWOOD_PLAYCTL_SPDIF_EN);
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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value = readl(priv->io + KIRKWOOD_RECCTL);
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value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
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writel(value, priv->io + KIRKWOOD_RECCTL);
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return 0;
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}
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static int kirkwood_i2s_remove(struct snd_soc_dai *dai)
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{
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return 0;
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}
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static struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
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.startup = kirkwood_i2s_startup,
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.trigger = kirkwood_i2s_trigger,
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.hw_params = kirkwood_i2s_hw_params,
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.set_fmt = kirkwood_i2s_set_fmt,
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};
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static struct snd_soc_dai_driver kirkwood_i2s_dai = {
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.probe = kirkwood_i2s_probe,
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.remove = kirkwood_i2s_remove,
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.playback = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = KIRKWOOD_I2S_RATES,
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.formats = KIRKWOOD_I2S_FORMATS,},
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.capture = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = KIRKWOOD_I2S_RATES,
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.formats = KIRKWOOD_I2S_FORMATS,},
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.ops = &kirkwood_i2s_dai_ops,
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};
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static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
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{
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struct resource *mem;
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struct kirkwood_asoc_platform_data *data =
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pdev->dev.platform_data;
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struct kirkwood_dma_data *priv;
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int err;
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priv = kzalloc(sizeof(struct kirkwood_dma_data), GFP_KERNEL);
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if (!priv) {
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dev_err(&pdev->dev, "allocation failed\n");
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err = -ENOMEM;
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goto error;
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}
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dev_set_drvdata(&pdev->dev, priv);
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!mem) {
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dev_err(&pdev->dev, "platform_get_resource failed\n");
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err = -ENXIO;
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goto err_alloc;
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}
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priv->mem = request_mem_region(mem->start, SZ_16K, DRV_NAME);
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if (!priv->mem) {
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dev_err(&pdev->dev, "request_mem_region failed\n");
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err = -EBUSY;
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goto error;
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}
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priv->io = ioremap(priv->mem->start, SZ_16K);
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if (!priv->io) {
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dev_err(&pdev->dev, "ioremap failed\n");
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err = -ENOMEM;
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goto err_iomem;
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}
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priv->irq = platform_get_irq(pdev, 0);
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if (priv->irq <= 0) {
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dev_err(&pdev->dev, "platform_get_irq failed\n");
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err = -ENXIO;
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goto err_ioremap;
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}
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if (!data || !data->dram) {
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dev_err(&pdev->dev, "no platform data ?!\n");
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err = -EINVAL;
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goto err_ioremap;
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}
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priv->dram = data->dram;
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priv->burst = data->burst;
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return snd_soc_register_dai(&pdev->dev, &kirkwood_i2s_dai);
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err_ioremap:
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iounmap(priv->io);
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err_iomem:
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release_mem_region(priv->mem->start, SZ_16K);
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err_alloc:
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kfree(priv);
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error:
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return err;
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}
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static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
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{
|
|
struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
|
|
|
|
snd_soc_unregister_dai(&pdev->dev);
|
|
iounmap(priv->io);
|
|
release_mem_region(priv->mem->start, SZ_16K);
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver kirkwood_i2s_driver = {
|
|
.probe = kirkwood_i2s_dev_probe,
|
|
.remove = kirkwood_i2s_dev_remove,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init kirkwood_i2s_init(void)
|
|
{
|
|
return platform_driver_register(&kirkwood_i2s_driver);
|
|
}
|
|
module_init(kirkwood_i2s_init);
|
|
|
|
static void __exit kirkwood_i2s_exit(void)
|
|
{
|
|
platform_driver_unregister(&kirkwood_i2s_driver);
|
|
}
|
|
module_exit(kirkwood_i2s_exit);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
|
|
MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:kirkwood-i2s");
|