#include <linux/clk.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#define IMG_SPDIF_IN_RX_FIFO_OFFSET 0
#define IMG_SPDIF_IN_CTL 0x4
#define IMG_SPDIF_IN_CTL_LOCKLO_MASK 0xff
#define IMG_SPDIF_IN_CTL_LOCKLO_SHIFT 0
#define IMG_SPDIF_IN_CTL_LOCKHI_MASK 0xff00
#define IMG_SPDIF_IN_CTL_LOCKHI_SHIFT 8
#define IMG_SPDIF_IN_CTL_TRK_MASK 0xff0000
#define IMG_SPDIF_IN_CTL_TRK_SHIFT 16
#define IMG_SPDIF_IN_CTL_SRD_MASK 0x70000000
#define IMG_SPDIF_IN_CTL_SRD_SHIFT 28
#define IMG_SPDIF_IN_CTL_SRT_MASK BIT(31)
#define IMG_SPDIF_IN_STATUS 0x8
#define IMG_SPDIF_IN_STATUS_SAM_MASK 0x7000
#define IMG_SPDIF_IN_STATUS_SAM_SHIFT 12
#define IMG_SPDIF_IN_STATUS_LOCK_MASK BIT(15)
#define IMG_SPDIF_IN_STATUS_LOCK_SHIFT 15
#define IMG_SPDIF_IN_CLKGEN 0x1c
#define IMG_SPDIF_IN_CLKGEN_NOM_MASK 0x3ff
#define IMG_SPDIF_IN_CLKGEN_NOM_SHIFT 0
#define IMG_SPDIF_IN_CLKGEN_HLD_MASK 0x3ff0000
#define IMG_SPDIF_IN_CLKGEN_HLD_SHIFT 16
#define IMG_SPDIF_IN_CSL 0x20
#define IMG_SPDIF_IN_CSH 0x24
#define IMG_SPDIF_IN_CSH_MASK 0xff
#define IMG_SPDIF_IN_CSH_SHIFT 0
#define IMG_SPDIF_IN_SOFT_RESET 0x28
#define IMG_SPDIF_IN_SOFT_RESET_MASK BIT(0)
#define IMG_SPDIF_IN_ACLKGEN_START 0x2c
#define IMG_SPDIF_IN_ACLKGEN_NOM_MASK 0x3ff
#define IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT 0
#define IMG_SPDIF_IN_ACLKGEN_HLD_MASK 0xffc00
#define IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT 10
#define IMG_SPDIF_IN_ACLKGEN_TRK_MASK 0xff00000
#define IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT 20
#define IMG_SPDIF_IN_NUM_ACLKGEN 4
struct img_spdif_in {
spinlock_t lock;
void __iomem *base;
struct clk *clk_sys;
struct snd_dmaengine_dai_dma_data dma_data;
struct device *dev;
unsigned int trk;
bool multi_freq;
int lock_acquire;
int lock_release;
unsigned int single_freq;
unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
bool active;
u32 suspend_clkgen;
u32 suspend_ctl;
unsigned int aclkgen_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
};
static int img_spdif_in_runtime_suspend(struct device *dev)
{
struct img_spdif_in *spdif = dev_get_drvdata(dev);
clk_disable_unprepare(spdif->clk_sys);
return 0;
}
static int img_spdif_in_runtime_resume(struct device *dev)
{
struct img_spdif_in *spdif = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(spdif->clk_sys);
if (ret) {
dev_err(dev, "Unable to enable sys clock\n");
return ret;
}
return 0;
}
static inline void img_spdif_in_writel(struct img_spdif_in *spdif,
u32 val, u32 reg)
{
writel(val, spdif->base + reg);
}
static inline u32 img_spdif_in_readl(struct img_spdif_in *spdif, u32 reg)
{
return readl(spdif->base + reg);
}
static inline void img_spdif_in_aclkgen_writel(struct img_spdif_in *spdif,
u32 index)
{
img_spdif_in_writel(spdif, spdif->aclkgen_regs[index],
IMG_SPDIF_IN_ACLKGEN_START + (index * 0x4));
}
static int img_spdif_in_check_max_rate(struct img_spdif_in *spdif,
unsigned int sample_rate, unsigned long *actual_freq)
{
unsigned long min_freq, freq_t;
min_freq = sample_rate * 2 * 32 * 24;
freq_t = clk_get_rate(spdif->clk_sys);
if (freq_t < min_freq)
return -EINVAL;
*actual_freq = freq_t;
return 0;
}
static int img_spdif_in_do_clkgen_calc(unsigned int rate, unsigned int *pnom,
unsigned int *phld, unsigned long clk_rate)
{
unsigned int ori, nom, hld;
if (!rate)
return -EINVAL;
ori = clk_rate / (rate * 64);
if (!ori)
return -EINVAL;
nom = (4096 / ori) + 1;
do
hld = 4096 - (--nom * (ori - 1));
while (hld < 120);
*pnom = nom;
*phld = hld;
return 0;
}
static int img_spdif_in_do_clkgen_single(struct img_spdif_in *spdif,
unsigned int rate)
{
unsigned int nom, hld;
unsigned long flags, clk_rate;
int ret = 0;
u32 reg;
ret = img_spdif_in_check_max_rate(spdif, rate, &clk_rate);
if (ret)
return ret;
ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
if (ret)
return ret;
reg = (nom << IMG_SPDIF_IN_CLKGEN_NOM_SHIFT) &
IMG_SPDIF_IN_CLKGEN_NOM_MASK;
reg |= (hld << IMG_SPDIF_IN_CLKGEN_HLD_SHIFT) &
IMG_SPDIF_IN_CLKGEN_HLD_MASK;
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->active) {
spin_unlock_irqrestore(&spdif->lock, flags);
return -EBUSY;
}
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CLKGEN);
spdif->single_freq = rate;
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_do_clkgen_multi(struct img_spdif_in *spdif,
unsigned int multi_freqs[])
{
unsigned int nom, hld, rate, max_rate = 0;
unsigned long flags, clk_rate;
int i, ret = 0;
u32 reg, trk_reg, temp_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
if (multi_freqs[i] > max_rate)
max_rate = multi_freqs[i];
ret = img_spdif_in_check_max_rate(spdif, max_rate, &clk_rate);
if (ret)
return ret;
for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
rate = multi_freqs[i];
ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
if (ret)
return ret;
reg = (nom << IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT) &
IMG_SPDIF_IN_ACLKGEN_NOM_MASK;
reg |= (hld << IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT) &
IMG_SPDIF_IN_ACLKGEN_HLD_MASK;
temp_regs[i] = reg;
}
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->active) {
spin_unlock_irqrestore(&spdif->lock, flags);
return -EBUSY;
}
trk_reg = spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT;
for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
spdif->aclkgen_regs[i] = temp_regs[i] | trk_reg;
img_spdif_in_aclkgen_writel(spdif, i);
}
spdif->multi_freq = true;
spdif->multi_freqs[0] = multi_freqs[0];
spdif->multi_freqs[1] = multi_freqs[1];
spdif->multi_freqs[2] = multi_freqs[2];
spdif->multi_freqs[3] = multi_freqs[3];
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_iec958_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
uinfo->count = 1;
return 0;
}
static int img_spdif_in_get_status_mask(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.iec958.status[0] = 0xff;
ucontrol->value.iec958.status[1] = 0xff;
ucontrol->value.iec958.status[2] = 0xff;
ucontrol->value.iec958.status[3] = 0xff;
ucontrol->value.iec958.status[4] = 0xff;
return 0;
}
static int img_spdif_in_get_status(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
u32 reg;
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSL);
ucontrol->value.iec958.status[0] = reg & 0xff;
ucontrol->value.iec958.status[1] = (reg >> 8) & 0xff;
ucontrol->value.iec958.status[2] = (reg >> 16) & 0xff;
ucontrol->value.iec958.status[3] = (reg >> 24) & 0xff;
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSH);
ucontrol->value.iec958.status[4] = (reg & IMG_SPDIF_IN_CSH_MASK)
>> IMG_SPDIF_IN_CSH_SHIFT;
return 0;
}
static int img_spdif_in_info_multi_freq(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = IMG_SPDIF_IN_NUM_ACLKGEN;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = LONG_MAX;
return 0;
}
static int img_spdif_in_get_multi_freq(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
unsigned long flags;
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->multi_freq) {
ucontrol->value.integer.value[0] = spdif->multi_freqs[0];
ucontrol->value.integer.value[1] = spdif->multi_freqs[1];
ucontrol->value.integer.value[2] = spdif->multi_freqs[2];
ucontrol->value.integer.value[3] = spdif->multi_freqs[3];
} else {
ucontrol->value.integer.value[0] = 0;
ucontrol->value.integer.value[1] = 0;
ucontrol->value.integer.value[2] = 0;
ucontrol->value.integer.value[3] = 0;
}
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_set_multi_freq(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
bool multi_freq;
unsigned long flags;
if ((ucontrol->value.integer.value[0] == 0) &&
(ucontrol->value.integer.value[1] == 0) &&
(ucontrol->value.integer.value[2] == 0) &&
(ucontrol->value.integer.value[3] == 0)) {
multi_freq = false;
} else {
multi_freqs[0] = ucontrol->value.integer.value[0];
multi_freqs[1] = ucontrol->value.integer.value[1];
multi_freqs[2] = ucontrol->value.integer.value[2];
multi_freqs[3] = ucontrol->value.integer.value[3];
multi_freq = true;
}
if (multi_freq)
return img_spdif_in_do_clkgen_multi(spdif, multi_freqs);
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->active) {
spin_unlock_irqrestore(&spdif->lock, flags);
return -EBUSY;
}
spdif->multi_freq = false;
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_info_lock_freq(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = LONG_MAX;
return 0;
}
static int img_spdif_in_get_lock_freq(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *uc)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
u32 reg;
int i;
unsigned long flags;
spin_lock_irqsave(&spdif->lock, flags);
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_STATUS);
if (reg & IMG_SPDIF_IN_STATUS_LOCK_MASK) {
if (spdif->multi_freq) {
i = ((reg & IMG_SPDIF_IN_STATUS_SAM_MASK) >>
IMG_SPDIF_IN_STATUS_SAM_SHIFT) - 1;
uc->value.integer.value[0] = spdif->multi_freqs[i];
} else {
uc->value.integer.value[0] = spdif->single_freq;
}
} else {
uc->value.integer.value[0] = 0;
}
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_info_trk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 255;
return 0;
}
static int img_spdif_in_get_trk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
ucontrol->value.integer.value[0] = spdif->trk;
return 0;
}
static int img_spdif_in_set_trk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
unsigned long flags;
int i;
u32 reg;
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->active) {
spin_unlock_irqrestore(&spdif->lock, flags);
return -EBUSY;
}
spdif->trk = ucontrol->value.integer.value[0];
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
reg &= ~IMG_SPDIF_IN_CTL_TRK_MASK;
reg |= spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
spdif->aclkgen_regs[i] = (spdif->aclkgen_regs[i] &
~IMG_SPDIF_IN_ACLKGEN_TRK_MASK) |
(spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT);
img_spdif_in_aclkgen_writel(spdif, i);
}
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_info_lock(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = -128;
uinfo->value.integer.max = 127;
return 0;
}
static int img_spdif_in_get_lock_acquire(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
ucontrol->value.integer.value[0] = spdif->lock_acquire;
return 0;
}
static int img_spdif_in_set_lock_acquire(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->active) {
spin_unlock_irqrestore(&spdif->lock, flags);
return -EBUSY;
}
spdif->lock_acquire = ucontrol->value.integer.value[0];
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
reg &= ~IMG_SPDIF_IN_CTL_LOCKHI_MASK;
reg |= (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
IMG_SPDIF_IN_CTL_LOCKHI_MASK;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static int img_spdif_in_get_lock_release(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
ucontrol->value.integer.value[0] = spdif->lock_release;
return 0;
}
static int img_spdif_in_set_lock_release(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
unsigned long flags;
u32 reg;
spin_lock_irqsave(&spdif->lock, flags);
if (spdif->active) {
spin_unlock_irqrestore(&spdif->lock, flags);
return -EBUSY;
}
spdif->lock_release = ucontrol->value.integer.value[0];
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
reg &= ~IMG_SPDIF_IN_CTL_LOCKLO_MASK;
reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
IMG_SPDIF_IN_CTL_LOCKLO_MASK;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
spin_unlock_irqrestore(&spdif->lock, flags);
return 0;
}
static struct snd_kcontrol_new img_spdif_in_controls[] = {
{
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
.info = img_spdif_in_iec958_info,
.get = img_spdif_in_get_status_mask
},
{
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
.info = img_spdif_in_iec958_info,
.get = img_spdif_in_get_status
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "SPDIF In Multi Frequency Acquire",
.info = img_spdif_in_info_multi_freq,
.get = img_spdif_in_get_multi_freq,
.put = img_spdif_in_set_multi_freq
},
{
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "SPDIF In Lock Frequency",
.info = img_spdif_in_info_lock_freq,
.get = img_spdif_in_get_lock_freq
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "SPDIF In Lock TRK",
.info = img_spdif_in_info_trk,
.get = img_spdif_in_get_trk,
.put = img_spdif_in_set_trk
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "SPDIF In Lock Acquire Threshold",
.info = img_spdif_in_info_lock,
.get = img_spdif_in_get_lock_acquire,
.put = img_spdif_in_set_lock_acquire
},
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "SPDIF In Lock Release Threshold",
.info = img_spdif_in_info_lock,
.get = img_spdif_in_get_lock_release,
.put = img_spdif_in_set_lock_release
}
};
static int img_spdif_in_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
unsigned long flags;
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
int ret = 0;
u32 reg;
spin_lock_irqsave(&spdif->lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
if (spdif->multi_freq)
reg &= ~IMG_SPDIF_IN_CTL_SRD_MASK;
else
reg |= (1UL << IMG_SPDIF_IN_CTL_SRD_SHIFT);
reg |= IMG_SPDIF_IN_CTL_SRT_MASK;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
spdif->active = true;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
reg &= ~IMG_SPDIF_IN_CTL_SRT_MASK;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
spdif->active = false;
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&spdif->lock, flags);
return ret;
}
static int img_spdif_in_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
unsigned int rate, channels;
snd_pcm_format_t format;
rate = params_rate(params);
channels = params_channels(params);
format = params_format(params);
if (format != SNDRV_PCM_FORMAT_S32_LE)
return -EINVAL;
if (channels != 2)
return -EINVAL;
return img_spdif_in_do_clkgen_single(spdif, rate);
}
static int img_spdif_in_dai_probe(struct snd_soc_dai *dai)
{
struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
snd_soc_dai_init_dma_data(dai, NULL, &spdif->dma_data);
snd_soc_add_dai_controls(dai, img_spdif_in_controls,
ARRAY_SIZE(img_spdif_in_controls));
return 0;
}
static const struct snd_soc_dai_ops img_spdif_in_dai_ops = {
.probe = img_spdif_in_dai_probe,
.trigger = img_spdif_in_trigger,
.hw_params = img_spdif_in_hw_params
};
static struct snd_soc_dai_driver img_spdif_in_dai = {
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S32_LE
},
.ops = &img_spdif_in_dai_ops
};
static const struct snd_soc_component_driver img_spdif_in_component = {
.name = "img-spdif-in",
.legacy_dai_naming = 1,
};
static int img_spdif_in_probe(struct platform_device *pdev)
{
struct img_spdif_in *spdif;
struct resource *res;
void __iomem *base;
int ret;
struct reset_control *rst;
u32 reg;
struct device *dev = &pdev->dev;
spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
if (!spdif)
return -ENOMEM;
platform_set_drvdata(pdev, spdif);
spdif->dev = &pdev->dev;
base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(base))
return PTR_ERR(base);
spdif->base = base;
spdif->clk_sys = devm_clk_get(dev, "sys");
if (IS_ERR(spdif->clk_sys))
return dev_err_probe(dev, PTR_ERR(spdif->clk_sys),
"Failed to acquire clock 'sys'\n");
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = img_spdif_in_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0)
goto err_suspend;
rst = devm_reset_control_get_exclusive(&pdev->dev, "rst");
if (IS_ERR(rst)) {
if (PTR_ERR(rst) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto err_pm_put;
}
dev_dbg(dev, "No top level reset found\n");
img_spdif_in_writel(spdif, IMG_SPDIF_IN_SOFT_RESET_MASK,
IMG_SPDIF_IN_SOFT_RESET);
img_spdif_in_writel(spdif, 0, IMG_SPDIF_IN_SOFT_RESET);
} else {
reset_control_assert(rst);
reset_control_deassert(rst);
}
spin_lock_init(&spdif->lock);
spdif->dma_data.addr = res->start + IMG_SPDIF_IN_RX_FIFO_OFFSET;
spdif->dma_data.addr_width = 4;
spdif->dma_data.maxburst = 4;
spdif->trk = 0x80;
spdif->lock_acquire = 4;
spdif->lock_release = -128;
reg = (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
IMG_SPDIF_IN_CTL_LOCKHI_MASK;
reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
IMG_SPDIF_IN_CTL_LOCKLO_MASK;
reg |= (spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT) &
IMG_SPDIF_IN_CTL_TRK_MASK;
img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
pm_runtime_put(&pdev->dev);
ret = devm_snd_soc_register_component(&pdev->dev,
&img_spdif_in_component, &img_spdif_in_dai, 1);
if (ret)
goto err_suspend;
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret)
goto err_suspend;
return 0;
err_pm_put:
pm_runtime_put(&pdev->dev);
err_suspend:
if (!pm_runtime_enabled(&pdev->dev))
img_spdif_in_runtime_suspend(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
return ret;
}
static void img_spdif_in_dev_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
img_spdif_in_runtime_suspend(&pdev->dev);
}
static int img_spdif_in_suspend(struct device *dev)
{
struct img_spdif_in *spdif = dev_get_drvdata(dev);
int ret;
if (pm_runtime_status_suspended(dev)) {
ret = img_spdif_in_runtime_resume(dev);
if (ret)
return ret;
}
spdif->suspend_clkgen = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CLKGEN);
spdif->suspend_ctl = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
img_spdif_in_runtime_suspend(dev);
return 0;
}
static int img_spdif_in_resume(struct device *dev)
{
struct img_spdif_in *spdif = dev_get_drvdata(dev);
int i, ret;
ret = img_spdif_in_runtime_resume(dev);
if (ret)
return ret;
for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
img_spdif_in_aclkgen_writel(spdif, i);
img_spdif_in_writel(spdif, spdif->suspend_clkgen, IMG_SPDIF_IN_CLKGEN);
img_spdif_in_writel(spdif, spdif->suspend_ctl, IMG_SPDIF_IN_CTL);
if (pm_runtime_status_suspended(dev))
img_spdif_in_runtime_suspend(dev);
return 0;
}
static const struct of_device_id img_spdif_in_of_match[] = {
{ .compatible = "img,spdif-in" },
{}
};
MODULE_DEVICE_TABLE(of, img_spdif_in_of_match);
static const struct dev_pm_ops img_spdif_in_pm_ops = {
RUNTIME_PM_OPS(img_spdif_in_runtime_suspend, img_spdif_in_runtime_resume, NULL)
SYSTEM_SLEEP_PM_OPS(img_spdif_in_suspend, img_spdif_in_resume)
};
static struct platform_driver img_spdif_in_driver = {
.driver = {
.name = "img-spdif-in",
.of_match_table = img_spdif_in_of_match,
.pm = pm_ptr(&img_spdif_in_pm_ops)
},
.probe = img_spdif_in_probe,
.remove = img_spdif_in_dev_remove
};
module_platform_driver(img_spdif_in_driver);
MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
MODULE_DESCRIPTION("IMG SPDIF Input driver");
MODULE_LICENSE("GPL v2");
