mirror of https://gitee.com/openkylin/linux.git
574 lines
14 KiB
C
574 lines
14 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 <linux/clk.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 <linux/platform_data/asoc-kirkwood.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_DCO_LOCK;
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} while (value == 0);
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}
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static void kirkwood_set_rate(struct snd_soc_dai *dai,
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struct kirkwood_dma_data *priv, unsigned long rate)
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{
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uint32_t clks_ctrl;
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if (rate == 44100 || rate == 48000 || rate == 96000) {
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/* use internal dco for supported rates */
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dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
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__func__, rate);
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kirkwood_set_dco(priv->io, rate);
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clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
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} else if (!IS_ERR(priv->extclk)) {
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/* use optional external clk for other rates */
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dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
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__func__, rate, 256 * rate);
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clk_set_rate(priv->extclk, 256 * rate);
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clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
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}
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writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
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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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uint32_t ctl_play, ctl_rec;
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unsigned int i2s_reg;
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unsigned long i2s_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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} else {
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i2s_reg = KIRKWOOD_I2S_RECCTL;
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}
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kirkwood_set_rate(dai, priv, 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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/*
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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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ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C |
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KIRKWOOD_PLAYCTL_I2S_EN;
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ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
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KIRKWOOD_RECCTL_I2S_EN;
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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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ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 |
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KIRKWOOD_PLAYCTL_I2S_EN;
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ctl_rec = KIRKWOOD_RECCTL_SIZE_20 |
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KIRKWOOD_RECCTL_I2S_EN;
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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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ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 |
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KIRKWOOD_PLAYCTL_I2S_EN;
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ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
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KIRKWOOD_RECCTL_I2S_EN;
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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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ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 |
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KIRKWOOD_PLAYCTL_I2S_EN;
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ctl_rec = KIRKWOOD_RECCTL_SIZE_32 |
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KIRKWOOD_RECCTL_I2S_EN;
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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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if (params_channels(params) == 1)
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ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH;
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else
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ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF;
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priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
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KIRKWOOD_PLAYCTL_I2S_EN |
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KIRKWOOD_PLAYCTL_SPDIF_EN |
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KIRKWOOD_PLAYCTL_SIZE_MASK);
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priv->ctl_play |= ctl_play;
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} else {
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priv->ctl_rec &= ~KIRKWOOD_RECCTL_SIZE_MASK;
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priv->ctl_rec |= ctl_rec;
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}
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writel(i2s_value, priv->io+i2s_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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uint32_t ctl, value;
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ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
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if (ctl & KIRKWOOD_PLAYCTL_PAUSE) {
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unsigned timeout = 5000;
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/*
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* The Armada510 spec says that if we enter pause mode, the
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* busy bit must be read back as clear _twice_. Make sure
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* we respect that otherwise we get DMA underruns.
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*/
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do {
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value = ctl;
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ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
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if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
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break;
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udelay(1);
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} while (timeout--);
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if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
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dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
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ctl);
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}
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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/* configure */
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ctl = priv->ctl_play;
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value = ctl & ~(KIRKWOOD_PLAYCTL_I2S_EN |
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KIRKWOOD_PLAYCTL_SPDIF_EN);
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writel(value, priv->io + KIRKWOOD_PLAYCTL);
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/* enable interrupts */
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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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/* enable playback */
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writel(ctl, 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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ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
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writel(ctl, 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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ctl &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
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writel(ctl, 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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ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
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writel(ctl, 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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ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE);
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writel(ctl, 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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uint32_t ctl, 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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/* configure */
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ctl = priv->ctl_rec;
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value = ctl & ~KIRKWOOD_RECCTL_I2S_EN;
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writel(value, priv->io + KIRKWOOD_RECCTL);
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/* enable interrupts */
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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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/* enable record */
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writel(ctl, 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 const 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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},
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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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},
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.ops = &kirkwood_i2s_dai_ops,
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};
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static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk = {
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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 = SNDRV_PCM_RATE_8000_192000 |
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SNDRV_PCM_RATE_CONTINUOUS |
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SNDRV_PCM_RATE_KNOT,
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.formats = KIRKWOOD_I2S_FORMATS,
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},
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.capture = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_192000 |
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SNDRV_PCM_RATE_CONTINUOUS |
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SNDRV_PCM_RATE_KNOT,
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.formats = KIRKWOOD_I2S_FORMATS,
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},
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.ops = &kirkwood_i2s_dai_ops,
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};
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static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
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{
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struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
|
|
struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai;
|
|
struct kirkwood_dma_data *priv;
|
|
struct resource *mem;
|
|
int err;
|
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(&pdev->dev, "allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
dev_set_drvdata(&pdev->dev, priv);
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem) {
|
|
dev_err(&pdev->dev, "platform_get_resource failed\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
priv->io = devm_request_and_ioremap(&pdev->dev, mem);
|
|
if (!priv->io) {
|
|
dev_err(&pdev->dev, "devm_request_and_ioremap failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->irq = platform_get_irq(pdev, 0);
|
|
if (priv->irq <= 0) {
|
|
dev_err(&pdev->dev, "platform_get_irq failed\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
if (!data) {
|
|
dev_err(&pdev->dev, "no platform data ?!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
priv->burst = data->burst;
|
|
|
|
priv->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(priv->clk)) {
|
|
dev_err(&pdev->dev, "no clock\n");
|
|
return PTR_ERR(priv->clk);
|
|
}
|
|
|
|
err = clk_prepare_enable(priv->clk);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
priv->extclk = clk_get(&pdev->dev, "extclk");
|
|
if (!IS_ERR(priv->extclk)) {
|
|
if (priv->extclk == priv->clk) {
|
|
clk_put(priv->extclk);
|
|
priv->extclk = ERR_PTR(-EINVAL);
|
|
} else {
|
|
dev_info(&pdev->dev, "found external clock\n");
|
|
clk_prepare_enable(priv->extclk);
|
|
soc_dai = &kirkwood_i2s_dai_extclk;
|
|
}
|
|
}
|
|
|
|
/* Some sensible defaults - this reflects the powerup values */
|
|
priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
|
|
priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
|
|
|
|
/* Select the burst size */
|
|
if (data->burst == 32) {
|
|
priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
|
|
priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
|
|
} else {
|
|
priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128;
|
|
priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128;
|
|
}
|
|
|
|
err = snd_soc_register_dai(&pdev->dev, soc_dai);
|
|
if (!err)
|
|
return 0;
|
|
dev_err(&pdev->dev, "snd_soc_register_dai failed\n");
|
|
|
|
if (!IS_ERR(priv->extclk)) {
|
|
clk_disable_unprepare(priv->extclk);
|
|
clk_put(priv->extclk);
|
|
}
|
|
clk_disable_unprepare(priv->clk);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
|
|
{
|
|
struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
|
|
|
|
snd_soc_unregister_dai(&pdev->dev);
|
|
|
|
if (!IS_ERR(priv->extclk)) {
|
|
clk_disable_unprepare(priv->extclk);
|
|
clk_put(priv->extclk);
|
|
}
|
|
clk_disable_unprepare(priv->clk);
|
|
|
|
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,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(kirkwood_i2s_driver);
|
|
|
|
/* 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");
|