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linux/sound/soc/kirkwood/kirkwood-i2s.c
Uwe Kleine-König 8c078706e9
ASoC: kirkwood: kirkwood-i2s: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20230315150745.67084-106-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:08:35 +00:00

776 lines
20 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* kirkwood-i2s.c
*
* (c) 2010 Arnaud Patard <apatard@mandriva.com>
* (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/mbus.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <linux/platform_data/asoc-kirkwood.h>
#include <linux/of.h>
#include "kirkwood.h"
#define KIRKWOOD_I2S_FORMATS \
(SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
#define KIRKWOOD_SPDIF_FORMATS \
(SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE)
/* These registers are relative to the second register region -
* audio pll configuration.
*/
#define A38X_PLL_CONF_REG0 0x0
#define A38X_PLL_FB_CLK_DIV_OFFSET 10
#define A38X_PLL_FB_CLK_DIV_MASK 0x7fc00
#define A38X_PLL_CONF_REG1 0x4
#define A38X_PLL_FREQ_OFFSET_MASK 0xffff
#define A38X_PLL_FREQ_OFFSET_VALID BIT(16)
#define A38X_PLL_SW_RESET BIT(31)
#define A38X_PLL_CONF_REG2 0x8
#define A38X_PLL_AUDIO_POSTDIV_MASK 0x7f
/* Bit below belongs to SoC control register corresponding to the third
* register region.
*/
#define A38X_SPDIF_MODE_ENABLE BIT(27)
static int armada_38x_i2s_init_quirk(struct platform_device *pdev,
struct kirkwood_dma_data *priv,
struct snd_soc_dai_driver *dai_drv)
{
struct device_node *np = pdev->dev.of_node;
u32 reg_val;
int i;
priv->pll_config = devm_platform_ioremap_resource_byname(pdev, "pll_regs");
if (IS_ERR(priv->pll_config))
return -ENOMEM;
priv->soc_control = devm_platform_ioremap_resource_byname(pdev, "soc_ctrl");
if (IS_ERR(priv->soc_control))
return -ENOMEM;
/* Select one of exceptive modes: I2S or S/PDIF */
reg_val = readl(priv->soc_control);
if (of_property_read_bool(np, "spdif-mode")) {
reg_val |= A38X_SPDIF_MODE_ENABLE;
dev_info(&pdev->dev, "using S/PDIF mode\n");
} else {
reg_val &= ~A38X_SPDIF_MODE_ENABLE;
dev_info(&pdev->dev, "using I2S mode\n");
}
writel(reg_val, priv->soc_control);
/* Update available rates of mclk's fs */
for (i = 0; i < 2; i++) {
dai_drv[i].playback.rates |= SNDRV_PCM_RATE_192000;
dai_drv[i].capture.rates |= SNDRV_PCM_RATE_192000;
}
return 0;
}
static inline void armada_38x_set_pll(void __iomem *base, unsigned long rate)
{
u32 reg_val;
u16 freq_offset = 0x22b0;
u8 audio_postdiv, fb_clk_div = 0x1d;
/* Set frequency offset value to not valid and enable PLL reset */
reg_val = readl(base + A38X_PLL_CONF_REG1);
reg_val &= ~A38X_PLL_FREQ_OFFSET_VALID;
reg_val &= ~A38X_PLL_SW_RESET;
writel(reg_val, base + A38X_PLL_CONF_REG1);
udelay(1);
/* Update PLL parameters */
switch (rate) {
default:
case 44100:
freq_offset = 0x735;
fb_clk_div = 0x1b;
audio_postdiv = 0xc;
break;
case 48000:
audio_postdiv = 0xc;
break;
case 96000:
audio_postdiv = 0x6;
break;
case 192000:
audio_postdiv = 0x3;
break;
}
reg_val = readl(base + A38X_PLL_CONF_REG0);
reg_val &= ~A38X_PLL_FB_CLK_DIV_MASK;
reg_val |= (fb_clk_div << A38X_PLL_FB_CLK_DIV_OFFSET);
writel(reg_val, base + A38X_PLL_CONF_REG0);
reg_val = readl(base + A38X_PLL_CONF_REG2);
reg_val &= ~A38X_PLL_AUDIO_POSTDIV_MASK;
reg_val |= audio_postdiv;
writel(reg_val, base + A38X_PLL_CONF_REG2);
reg_val = readl(base + A38X_PLL_CONF_REG1);
reg_val &= ~A38X_PLL_FREQ_OFFSET_MASK;
reg_val |= freq_offset;
writel(reg_val, base + A38X_PLL_CONF_REG1);
udelay(1);
/* Disable reset */
reg_val |= A38X_PLL_SW_RESET;
writel(reg_val, base + A38X_PLL_CONF_REG1);
/* Wait 50us for PLL to lock */
udelay(50);
/* Restore frequency offset value validity */
reg_val |= A38X_PLL_FREQ_OFFSET_VALID;
writel(reg_val, base + A38X_PLL_CONF_REG1);
}
static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
unsigned long mask;
unsigned long value;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
mask = KIRKWOOD_I2S_CTL_RJ;
break;
case SND_SOC_DAIFMT_LEFT_J:
mask = KIRKWOOD_I2S_CTL_LJ;
break;
case SND_SOC_DAIFMT_I2S:
mask = KIRKWOOD_I2S_CTL_I2S;
break;
default:
return -EINVAL;
}
/*
* Set same format for playback and record
* This avoids some troubles.
*/
value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
value |= mask;
writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
value |= mask;
writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
return 0;
}
static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
{
unsigned long value;
value = KIRKWOOD_DCO_CTL_OFFSET_0;
switch (rate) {
default:
case 44100:
value |= KIRKWOOD_DCO_CTL_FREQ_11;
break;
case 48000:
value |= KIRKWOOD_DCO_CTL_FREQ_12;
break;
case 96000:
value |= KIRKWOOD_DCO_CTL_FREQ_24;
break;
}
writel(value, io + KIRKWOOD_DCO_CTL);
/* wait for dco locked */
do {
cpu_relax();
value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
} while (value == 0);
}
static void kirkwood_set_rate(struct snd_soc_dai *dai,
struct kirkwood_dma_data *priv, unsigned long rate)
{
uint32_t clks_ctrl;
if (IS_ERR(priv->extclk)) {
/* use internal dco for the supported rates
* defined in kirkwood_i2s_dai */
dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
__func__, rate);
if (priv->pll_config)
armada_38x_set_pll(priv->pll_config, rate);
else
kirkwood_set_dco(priv->io, rate);
clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
} else {
/* use the external clock for the other rates
* defined in kirkwood_i2s_dai_extclk */
dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
__func__, rate, 256 * rate);
clk_set_rate(priv->extclk, 256 * rate);
clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
}
writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
}
static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
snd_soc_dai_set_dma_data(dai, substream, priv);
return 0;
}
static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
uint32_t ctl_play, ctl_rec;
unsigned int i2s_reg;
unsigned long i2s_value;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
i2s_reg = KIRKWOOD_I2S_PLAYCTL;
} else {
i2s_reg = KIRKWOOD_I2S_RECCTL;
}
kirkwood_set_rate(dai, priv, params_rate(params));
i2s_value = readl(priv->io+i2s_reg);
i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
/*
* Size settings in play/rec i2s control regs and play/rec control
* regs must be the same.
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C |
KIRKWOOD_PLAYCTL_I2S_EN |
KIRKWOOD_PLAYCTL_SPDIF_EN;
ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
KIRKWOOD_RECCTL_I2S_EN |
KIRKWOOD_RECCTL_SPDIF_EN;
break;
/*
* doesn't work... S20_3LE != kirkwood 20bit format ?
*
case SNDRV_PCM_FORMAT_S20_3LE:
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 |
KIRKWOOD_PLAYCTL_I2S_EN;
ctl_rec = KIRKWOOD_RECCTL_SIZE_20 |
KIRKWOOD_RECCTL_I2S_EN;
break;
*/
case SNDRV_PCM_FORMAT_S24_LE:
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 |
KIRKWOOD_PLAYCTL_I2S_EN |
KIRKWOOD_PLAYCTL_SPDIF_EN;
ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
KIRKWOOD_RECCTL_I2S_EN |
KIRKWOOD_RECCTL_SPDIF_EN;
break;
case SNDRV_PCM_FORMAT_S32_LE:
i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 |
KIRKWOOD_PLAYCTL_I2S_EN;
ctl_rec = KIRKWOOD_RECCTL_SIZE_32 |
KIRKWOOD_RECCTL_I2S_EN;
break;
default:
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (params_channels(params) == 1)
ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH;
else
ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF;
priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
KIRKWOOD_PLAYCTL_ENABLE_MASK |
KIRKWOOD_PLAYCTL_SIZE_MASK);
priv->ctl_play |= ctl_play;
} else {
priv->ctl_rec &= ~(KIRKWOOD_RECCTL_ENABLE_MASK |
KIRKWOOD_RECCTL_SIZE_MASK);
priv->ctl_rec |= ctl_rec;
}
writel(i2s_value, priv->io+i2s_reg);
return 0;
}
static unsigned kirkwood_i2s_play_mute(unsigned ctl)
{
if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN))
ctl |= KIRKWOOD_PLAYCTL_I2S_MUTE;
if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN))
ctl |= KIRKWOOD_PLAYCTL_SPDIF_MUTE;
return ctl;
}
static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
uint32_t ctl, value;
ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
if ((ctl & KIRKWOOD_PLAYCTL_ENABLE_MASK) == 0) {
unsigned timeout = 5000;
/*
* The Armada510 spec says that if we enter pause mode, the
* busy bit must be read back as clear _twice_. Make sure
* we respect that otherwise we get DMA underruns.
*/
do {
value = ctl;
ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
break;
udelay(1);
} while (timeout--);
if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
ctl);
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
/* configure */
ctl = priv->ctl_play;
if (dai->id == 0)
ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
else
ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
ctl = kirkwood_i2s_play_mute(ctl);
value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
writel(value, priv->io + KIRKWOOD_PLAYCTL);
/* enable interrupts */
if (!runtime->no_period_wakeup) {
value = readl(priv->io + KIRKWOOD_INT_MASK);
value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
writel(value, priv->io + KIRKWOOD_INT_MASK);
}
/* enable playback */
writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
break;
case SNDRV_PCM_TRIGGER_STOP:
/* stop audio, disable interrupts */
ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
KIRKWOOD_PLAYCTL_SPDIF_MUTE;
writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
value = readl(priv->io + KIRKWOOD_INT_MASK);
value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
writel(value, priv->io + KIRKWOOD_INT_MASK);
/* disable all playbacks */
ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
KIRKWOOD_PLAYCTL_SPDIF_MUTE;
writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
KIRKWOOD_PLAYCTL_SPDIF_MUTE);
ctl = kirkwood_i2s_play_mute(ctl);
writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
break;
default:
return -EINVAL;
}
return 0;
}
static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
uint32_t ctl, value;
value = readl(priv->io + KIRKWOOD_RECCTL);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
/* configure */
ctl = priv->ctl_rec;
if (dai->id == 0)
ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */
else
ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */
value = ctl & ~KIRKWOOD_RECCTL_ENABLE_MASK;
writel(value, priv->io + KIRKWOOD_RECCTL);
/* enable interrupts */
value = readl(priv->io + KIRKWOOD_INT_MASK);
value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
writel(value, priv->io + KIRKWOOD_INT_MASK);
/* enable record */
writel(ctl, priv->io + KIRKWOOD_RECCTL);
break;
case SNDRV_PCM_TRIGGER_STOP:
/* stop audio, disable interrupts */
value = readl(priv->io + KIRKWOOD_RECCTL);
value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
writel(value, priv->io + KIRKWOOD_RECCTL);
value = readl(priv->io + KIRKWOOD_INT_MASK);
value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
writel(value, priv->io + KIRKWOOD_INT_MASK);
/* disable all records */
value = readl(priv->io + KIRKWOOD_RECCTL);
value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
writel(value, priv->io + KIRKWOOD_RECCTL);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
value = readl(priv->io + KIRKWOOD_RECCTL);
value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
writel(value, priv->io + KIRKWOOD_RECCTL);
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
value = readl(priv->io + KIRKWOOD_RECCTL);
value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
writel(value, priv->io + KIRKWOOD_RECCTL);
break;
default:
return -EINVAL;
}
return 0;
}
static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return kirkwood_i2s_play_trigger(substream, cmd, dai);
else
return kirkwood_i2s_rec_trigger(substream, cmd, dai);
return 0;
}
static int kirkwood_i2s_init(struct kirkwood_dma_data *priv)
{
unsigned long value;
unsigned int reg_data;
/* put system in a "safe" state : */
/* disable audio interrupts */
writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
writel(0, priv->io + KIRKWOOD_INT_MASK);
reg_data = readl(priv->io + 0x1200);
reg_data &= (~(0x333FF8));
reg_data |= 0x111D18;
writel(reg_data, priv->io + 0x1200);
msleep(500);
reg_data = readl(priv->io + 0x1200);
reg_data &= (~(0x333FF8));
reg_data |= 0x111D18;
writel(reg_data, priv->io + 0x1200);
/* disable playback/record */
value = readl(priv->io + KIRKWOOD_PLAYCTL);
value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
writel(value, priv->io + KIRKWOOD_PLAYCTL);
value = readl(priv->io + KIRKWOOD_RECCTL);
value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
writel(value, priv->io + KIRKWOOD_RECCTL);
return 0;
}
static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
.startup = kirkwood_i2s_startup,
.trigger = kirkwood_i2s_trigger,
.hw_params = kirkwood_i2s_hw_params,
.set_fmt = kirkwood_i2s_set_fmt,
};
static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = {
{
.name = "i2s",
.id = 0,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000,
.formats = KIRKWOOD_I2S_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000,
.formats = KIRKWOOD_I2S_FORMATS,
},
.ops = &kirkwood_i2s_dai_ops,
},
{
.name = "spdif",
.id = 1,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000,
.formats = KIRKWOOD_SPDIF_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_96000,
.formats = KIRKWOOD_SPDIF_FORMATS,
},
.ops = &kirkwood_i2s_dai_ops,
},
};
static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
{
.name = "i2s",
.id = 0,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5512,
.rate_max = 192000,
.formats = KIRKWOOD_I2S_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5512,
.rate_max = 192000,
.formats = KIRKWOOD_I2S_FORMATS,
},
.ops = &kirkwood_i2s_dai_ops,
},
{
.name = "spdif",
.id = 1,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5512,
.rate_max = 192000,
.formats = KIRKWOOD_SPDIF_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 5512,
.rate_max = 192000,
.formats = KIRKWOOD_SPDIF_FORMATS,
},
.ops = &kirkwood_i2s_dai_ops,
},
};
static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
{
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 device_node *np = pdev->dev.of_node;
int err;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev_set_drvdata(&pdev->dev, priv);
if (of_device_is_compatible(np, "marvell,armada-380-audio"))
priv->io = devm_platform_ioremap_resource_byname(pdev, "i2s_regs");
else
priv->io = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->io))
return PTR_ERR(priv->io);
priv->irq = platform_get_irq(pdev, 0);
if (priv->irq < 0)
return priv->irq;
if (of_device_is_compatible(np, "marvell,armada-380-audio")) {
err = armada_38x_i2s_init_quirk(pdev, priv, soc_dai);
if (err < 0)
return err;
/* Set initial pll frequency */
armada_38x_set_pll(priv->pll_config, 44100);
}
if (np) {
priv->burst = 128; /* might be 32 or 128 */
} else if (data) {
priv->burst = data->burst;
} else {
dev_err(&pdev->dev, "no DT nor platform data ?!\n");
return -EINVAL;
}
priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "no clock\n");
return PTR_ERR(priv->clk);
}
priv->extclk = devm_clk_get(&pdev->dev, "extclk");
if (IS_ERR(priv->extclk)) {
if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
return -EPROBE_DEFER;
} else {
if (clk_is_match(priv->extclk, priv->clk)) {
devm_clk_put(&pdev->dev, 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;
}
}
err = clk_prepare_enable(priv->clk);
if (err < 0)
return err;
/* 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 (priv->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_component(&pdev->dev, &kirkwood_soc_component,
soc_dai, 2);
if (err) {
dev_err(&pdev->dev, "snd_soc_register_component failed\n");
goto err_component;
}
kirkwood_i2s_init(priv);
return 0;
err_component:
if (!IS_ERR(priv->extclk))
clk_disable_unprepare(priv->extclk);
clk_disable_unprepare(priv->clk);
return err;
}
static void kirkwood_i2s_dev_remove(struct platform_device *pdev)
{
struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
if (!IS_ERR(priv->extclk))
clk_disable_unprepare(priv->extclk);
clk_disable_unprepare(priv->clk);
}
#ifdef CONFIG_OF
static const struct of_device_id mvebu_audio_of_match[] = {
{ .compatible = "marvell,kirkwood-audio" },
{ .compatible = "marvell,dove-audio" },
{ .compatible = "marvell,armada370-audio" },
{ .compatible = "marvell,armada-380-audio" },
{ }
};
MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
#endif
static struct platform_driver kirkwood_i2s_driver = {
.probe = kirkwood_i2s_dev_probe,
.remove_new = kirkwood_i2s_dev_remove,
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(mvebu_audio_of_match),
},
};
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:mvebu-audio");
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