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@@ -0,0 +1,485 @@
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+/*
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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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+ *
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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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+
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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-i2s.h"
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+#include "kirkwood.h"
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+
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+#define DRV_NAME "kirkwood-i2s"
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+
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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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+
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+
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+struct snd_soc_dai kirkwood_i2s_dai;
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+static struct kirkwood_dma_data *priv;
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+
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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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+ unsigned long mask;
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+ unsigned long value;
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+
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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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+ /*
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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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+
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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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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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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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+ unsigned int i2s_reg, reg;
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+ unsigned long i2s_value, value;
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+
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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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+
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+ /* set dco conf */
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+ kirkwood_set_dco(priv->io, params_rate(params));
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+
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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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+ value = readl(priv->io+reg);
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+ value &= ~KIRKWOOD_PLAYCTL_SIZE_MASK;
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+
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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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+ writel(i2s_value, priv->io+i2s_reg);
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+ writel(value, priv->io+reg);
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+
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+ return 0;
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+}
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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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+ unsigned long value;
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+
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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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+
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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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+
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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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+
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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_SPDIF_EN);
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+
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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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+
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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;
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+ writel(value, priv->io + KIRKWOOD_PLAYCTL);
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+
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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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+
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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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+
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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;
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+ writel(value, priv->io + KIRKWOOD_PLAYCTL);
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+ break;
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+
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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;
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+ writel(value, priv->io + KIRKWOOD_PLAYCTL);
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+ break;
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+
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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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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+ unsigned long value;
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+
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+ value = readl(priv->io + KIRKWOOD_RECCTL);
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+
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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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+
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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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+
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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_SPDIF_EN);
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+
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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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+
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+ writel(value, priv->io + KIRKWOOD_RECCTL);
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+ break;
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+
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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;
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+ writel(value, priv->io + KIRKWOOD_RECCTL);
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+
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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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+
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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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+
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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;
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+ writel(value, priv->io + KIRKWOOD_RECCTL);
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+ break;
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+
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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;
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+ writel(value, priv->io + KIRKWOOD_RECCTL);
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+ break;
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+
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+ default:
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+ return -EINVAL;
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+ break;
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+ }
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+
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+ return 0;
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+}
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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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+
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+ return 0;
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+}
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+
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+static int kirkwood_i2s_probe(struct platform_device *pdev,
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+ struct snd_soc_dai *dai)
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+{
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+ unsigned long value;
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+ unsigned int reg_data;
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+
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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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+
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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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+
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+ msleep(500);
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+
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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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+
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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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+
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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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+
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+ return 0;
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+
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+}
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+
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+static void kirkwood_i2s_remove(struct platform_device *pdev,
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+ struct snd_soc_dai *dai)
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+{
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+}
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+
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+static struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
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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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+
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+
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+struct snd_soc_dai kirkwood_i2s_dai = {
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+ .name = DRV_NAME,
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+ .id = 0,
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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,},
|
|
|
+ .ops = &kirkwood_i2s_dai_ops,
|
|
|
+};
|
|
|
+EXPORT_SYMBOL_GPL(kirkwood_i2s_dai);
|
|
|
+
|
|
|
+static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct resource *mem;
|
|
|
+ struct kirkwood_asoc_platform_data *data =
|
|
|
+ pdev->dev.platform_data;
|
|
|
+ int err;
|
|
|
+
|
|
|
+ priv = kzalloc(sizeof(struct kirkwood_dma_data), GFP_KERNEL);
|
|
|
+ if (!priv) {
|
|
|
+ dev_err(&pdev->dev, "allocation failed\n");
|
|
|
+ err = -ENOMEM;
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
+ if (!mem) {
|
|
|
+ dev_err(&pdev->dev, "platform_get_resource failed\n");
|
|
|
+ err = -ENXIO;
|
|
|
+ goto err_alloc;
|
|
|
+ }
|
|
|
+
|
|
|
+ priv->mem = request_mem_region(mem->start, SZ_16K, DRV_NAME);
|
|
|
+ if (!priv->mem) {
|
|
|
+ dev_err(&pdev->dev, "request_mem_region failed\n");
|
|
|
+ err = -EBUSY;
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+
|
|
|
+ priv->io = ioremap(priv->mem->start, SZ_16K);
|
|
|
+ if (!priv->io) {
|
|
|
+ dev_err(&pdev->dev, "ioremap failed\n");
|
|
|
+ err = -ENOMEM;
|
|
|
+ goto err_iomem;
|
|
|
+ }
|
|
|
+
|
|
|
+ priv->irq = platform_get_irq(pdev, 0);
|
|
|
+ if (priv->irq <= 0) {
|
|
|
+ dev_err(&pdev->dev, "platform_get_irq failed\n");
|
|
|
+ err = -ENXIO;
|
|
|
+ goto err_ioremap;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!data || !data->dram) {
|
|
|
+ dev_err(&pdev->dev, "no platform data ?!\n");
|
|
|
+ err = -EINVAL;
|
|
|
+ goto err_ioremap;
|
|
|
+ }
|
|
|
+
|
|
|
+ priv->dram = data->dram;
|
|
|
+ priv->burst = data->burst;
|
|
|
+
|
|
|
+ kirkwood_i2s_dai.capture.dma_data = priv;
|
|
|
+ kirkwood_i2s_dai.playback.dma_data = priv;
|
|
|
+
|
|
|
+ return snd_soc_register_dai(&kirkwood_i2s_dai);
|
|
|
+
|
|
|
+err_ioremap:
|
|
|
+ iounmap(priv->io);
|
|
|
+err_iomem:
|
|
|
+ release_mem_region(priv->mem->start, SZ_16K);
|
|
|
+err_alloc:
|
|
|
+ kfree(priv);
|
|
|
+error:
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ if (priv) {
|
|
|
+ iounmap(priv->io);
|
|
|
+ release_mem_region(priv->mem->start, SZ_16K);
|
|
|
+ kfree(priv);
|
|
|
+ }
|
|
|
+ snd_soc_unregister_dai(&kirkwood_i2s_dai);
|
|
|
+ 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, <apatard@mandriva.com>");
|
|
|
+MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+MODULE_ALIAS("platform:kirkwood-i2s");
|