本文整理汇总了C++中params_format函数的典型用法代码示例。如果您正苦于以下问题：C++ params_format函数的具体用法？C++ params_format怎么用？C++ params_format使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了params_format函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: uda134x_hw_params
static int uda134x_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
struct uda134x_priv *uda134x = snd_soc_codec_get_drvdata(codec);
u8 hw_params;
if (substream == uda134x->slave_substream) {
pr_debug("%s ignoring hw_params for slave substream\n",
__func__);
return 0;
}
hw_params = uda134x_read_reg_cache(codec, UDA134X_STATUS0);
hw_params &= STATUS0_SYSCLK_MASK;
hw_params &= STATUS0_DAIFMT_MASK;
pr_debug("%s sysclk: %d, rate:%d\n", __func__,
uda134x->sysclk, params_rate(params));
/* set SYSCLK / fs ratio */
switch (uda134x->sysclk / params_rate(params)) {
case 512:
break;
case 384:
hw_params |= (1<<4);
break;
case 256:
hw_params |= (1<<5);
break;
default:
printk(KERN_ERR "%s unsupported fs\n", __func__);
return -EINVAL;
}
pr_debug("%s dai_fmt: %d, params_format:%d\n", __func__,
uda134x->dai_fmt, params_format(params));
/* set DAI format and word length */
switch (uda134x->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
break;
case SND_SOC_DAIFMT_RIGHT_J:
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
hw_params |= (1<<1);
break;
case SNDRV_PCM_FORMAT_S18_3LE:
hw_params |= (1<<2);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
hw_params |= ((1<<2) | (1<<1));
break;
default:
printk(KERN_ERR "%s unsupported format (right)\n",
__func__);
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_LEFT_J:
hw_params |= (1<<3);
break;
default:
printk(KERN_ERR "%s unsupported format\n", __func__);
return -EINVAL;
}
uda134x_write(codec, UDA134X_STATUS0, hw_params);
return 0;
}
开发者ID:3sOx，项目名称:asuswrt-merlin，代码行数:74，代码来源:uda134x.c
示例2: wm8940_i2s_hw_params
static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
u16 companding = snd_soc_read(codec,
WM8940_COMPANDINGCTL) & 0xFFDF;
int ret;
/* LoutR control */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& params_channels(params) == 2)
iface |= (1 << 9);
switch (params_rate(params)) {
case 8000:
addcntrl |= (0x5 << 1);
break;
case 11025:
addcntrl |= (0x4 << 1);
break;
case 16000:
addcntrl |= (0x3 << 1);
break;
case 22050:
addcntrl |= (0x2 << 1);
break;
case 32000:
addcntrl |= (0x1 << 1);
break;
case 44100:
case 48000:
break;
}
ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
if (ret)
goto error_ret;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
companding = companding | (1 << 5);
break;
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= (1 << 5);
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= (2 << 5);
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= (3 << 5);
break;
}
ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
if (ret)
goto error_ret;
ret = snd_soc_write(codec, WM8940_IFACE, iface);
error_ret:
return ret;
}
开发者ID:rrowicki，项目名称:Chrono_Kernel-1，代码行数:65，代码来源:wm8940.c
示例3: mop500_ab8500_hw_params
static int mop500_ab8500_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct device *dev = rtd->card->dev;
unsigned int fmt;
int channels, ret = 0, driver_mode, slots;
unsigned int sw_codec, sw_cpu;
bool is_playback;
dev_dbg(dev, "%s: Enter\n", __func__);
dev_dbg(dev, "%s: substream->pcm->name = %s\n"
"substream->pcm->id = %s.\n"
"substream->name = %s.\n"
"substream->number = %d.\n",
__func__,
substream->pcm->name,
substream->pcm->id,
substream->name,
substream->number);
/* Ensure configuration consistency between DAIs */
mutex_lock(&mop500_ab8500_params_lock);
if (mop500_ab8500_usage) {
if (mop500_ab8500_rate != params_rate(params) ||
mop500_ab8500_channels != params_channels(params)) {
mutex_unlock(&mop500_ab8500_params_lock);
return -EBUSY;
}
} else {
mop500_ab8500_rate = params_rate(params);
mop500_ab8500_channels = params_channels(params);
}
__set_bit(cpu_dai->id, &mop500_ab8500_usage);
mutex_unlock(&mop500_ab8500_params_lock);
channels = params_channels(params);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S32_LE:
sw_cpu = 32;
break;
case SNDRV_PCM_FORMAT_S16_LE:
sw_cpu = 16;
break;
default:
return -EINVAL;
}
/* Setup codec depending on driver-mode */
if (channels == 8)
driver_mode = DRIVERMODE_CODEC_ONLY;
else
driver_mode = DRIVERMODE_NORMAL;
dev_dbg(dev, "%s: Driver-mode: %s.\n", __func__,
(driver_mode == DRIVERMODE_NORMAL) ? "NORMAL" : "CODEC_ONLY");
/* Setup format */
if (driver_mode == DRIVERMODE_NORMAL) {
fmt = SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CONT;
} else {
fmt = SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_GATED;
}
ret = snd_soc_dai_set_fmt(codec_dai, fmt);
if (ret < 0) {
dev_err(dev,
"%s: ERROR: snd_soc_dai_set_fmt failed for codec_dai (ret = %d)!\n",
__func__, ret);
return ret;
}
ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
if (ret < 0) {
dev_err(dev,
"%s: ERROR: snd_soc_dai_set_fmt failed for cpu_dai (ret = %d)!\n",
__func__, ret);
return ret;
}
/* Setup TDM-slots */
is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
switch (channels) {
case 1:
slots = 16;
tx_slots = (is_playback) ? TX_SLOT_MONO : 0;
rx_slots = (is_playback) ? 0 : RX_SLOT_MONO;
//.........这里部分代码省略.........
开发者ID:383530895，项目名称:linux，代码行数:101，代码来源:mop500_ab8500.c
示例4: atmel_ssc_hw_params
/*
* Configure the SSC.
*/
static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int id = dai->id;
struct atmel_ssc_info *ssc_p = &ssc_info[id];
struct atmel_pcm_dma_params *dma_params;
int dir, channels, bits;
u32 tfmr, rfmr, tcmr, rcmr;
int start_event;
int ret;
/*
* Currently, there is only one set of dma params for
* each direction. If more are added, this code will
* have to be changed to select the proper set.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dir = 0;
else
dir = 1;
dma_params = ssc_p->dma_params[dir];
channels = params_channels(params);
/*
* Determine sample size in bits and the PDC increment.
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bits = 8;
dma_params->pdc_xfer_size = 1;
break;
case SNDRV_PCM_FORMAT_S16_LE:
bits = 16;
dma_params->pdc_xfer_size = 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
bits = 24;
dma_params->pdc_xfer_size = 4;
break;
case SNDRV_PCM_FORMAT_S32_LE:
bits = 32;
dma_params->pdc_xfer_size = 4;
break;
default:
printk(KERN_WARNING "atmel_ssc_dai: unsupported PCM format");
return -EINVAL;
}
/*
* The SSC only supports up to 16-bit samples in I2S format, due
* to the size of the Frame Mode Register FSLEN field.
*/
if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S
&& bits > 16) {
printk(KERN_WARNING
"atmel_ssc_dai: sample size %d "
"is too large for I2S\n", bits);
return -EINVAL;
}
/*
* Compute SSC register settings.
*/
switch (ssc_p->daifmt
& (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
/*
* I2S format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated
* from the MCK divider, and the BCLK signal
* is output on the SSC TK line.
*/
rcmr = SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period)
| SSC_BF(RCMR_STTDLY, START_DELAY)
| SSC_BF(RCMR_START, SSC_START_FALLING_RF)
| SSC_BF(RCMR_CKI, SSC_CKI_RISING)
| SSC_BF(RCMR_CKO, SSC_CKO_NONE)
| SSC_BF(RCMR_CKS, SSC_CKS_DIV);
rfmr = SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(RFMR_FSOS, SSC_FSOS_NEGATIVE)
| SSC_BF(RFMR_FSLEN, (bits - 1))
| SSC_BF(RFMR_DATNB, (channels - 1))
| SSC_BIT(RFMR_MSBF)
| SSC_BF(RFMR_LOOP, 0)
| SSC_BF(RFMR_DATLEN, (bits - 1));
tcmr = SSC_BF(TCMR_PERIOD, ssc_p->tcmr_period)
| SSC_BF(TCMR_STTDLY, START_DELAY)
| SSC_BF(TCMR_START, SSC_START_FALLING_RF)
| SSC_BF(TCMR_CKI, SSC_CKI_FALLING)
| SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS)
//.........这里部分代码省略.........
开发者ID:AeroGirl，项目名称:VAR-SOM-AM33-SDK7-Kernel，代码行数:101，代码来源:atmel_ssc_dai.c
示例5: omap_mcbsp_dai_hw_params
static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *cpu_dai)
{
struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
struct snd_dmaengine_dai_dma_data *dma_data;
int wlen, channels, wpf;
int pkt_size = 0;
unsigned int format, div, framesize, master;
dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
channels = params_channels(params);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
wlen = 16;
break;
case SNDRV_PCM_FORMAT_S32_LE:
wlen = 32;
break;
default:
return -EINVAL;
}
if (mcbsp->pdata->buffer_size) {
if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {
int period_words, max_thrsh;
int divider = 0;
period_words = params_period_bytes(params) / (wlen / 8);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
max_thrsh = mcbsp->max_tx_thres;
else
max_thrsh = mcbsp->max_rx_thres;
/*
* Use sDMA packet mode if McBSP is in threshold mode:
* If period words less than the FIFO size the packet
* size is set to the number of period words, otherwise
* Look for the biggest threshold value which divides
* the period size evenly.
*/
divider = period_words / max_thrsh;
if (period_words % max_thrsh)
divider++;
while (period_words % divider &&
divider < period_words)
divider++;
if (divider == period_words)
return -EINVAL;
pkt_size = period_words / divider;
} else if (channels > 1) {
/* Use packet mode for non mono streams */
pkt_size = channels;
}
omap_mcbsp_set_threshold(substream, pkt_size);
}
dma_data->maxburst = pkt_size;
if (mcbsp->configured) {
/* McBSP already configured by another stream */
return 0;
}
regs->rcr2 &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7));
regs->xcr2 &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7));
regs->rcr1 &= ~(RFRLEN1(0x7f) | RWDLEN1(7));
regs->xcr1 &= ~(XFRLEN1(0x7f) | XWDLEN1(7));
format = mcbsp->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
wpf = channels;
if (channels == 2 && (format == SND_SOC_DAIFMT_I2S ||
format == SND_SOC_DAIFMT_LEFT_J)) {
/* Use dual-phase frames */
regs->rcr2 |= RPHASE;
regs->xcr2 |= XPHASE;
/* Set 1 word per (McBSP) frame for phase1 and phase2 */
wpf--;
regs->rcr2 |= RFRLEN2(wpf - 1);
regs->xcr2 |= XFRLEN2(wpf - 1);
}
regs->rcr1 |= RFRLEN1(wpf - 1);
regs->xcr1 |= XFRLEN1(wpf - 1);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
/* Set word lengths */
regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_16);
regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_16);
regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_16);
regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_16);
break;
case SNDRV_PCM_FORMAT_S32_LE:
/* Set word lengths */
regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_32);
regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_32);
regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_32);
regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_32);
break;
//.........这里部分代码省略.........
开发者ID:020gzh，项目名称:linux，代码行数:101，代码来源:omap-mcbsp.c
示例6: zylonite_voice_hw_params
static int zylonite_voice_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
unsigned int pll_out = 0;
unsigned int wm9713_div = 0;
int ret = 0;
int rate = params_rate(params);
int width = snd_pcm_format_physical_width(params_format(params));
/* Only support ratios that we can generate neatly from the AC97
* based master clock - in particular, this excludes 44.1kHz.
* In most applications the voice DAC will be used for telephony
* data so multiples of 8kHz will be the common case.
*/
switch (rate) {
case 8000:
wm9713_div = 12;
break;
case 16000:
wm9713_div = 6;
break;
case 48000:
wm9713_div = 2;
break;
default:
/* Don't support OSS emulation */
return -EINVAL;
}
/* Add 1 to the width for the leading clock cycle */
pll_out = rate * (width + 1) * 8;
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
if (ret < 0)
return ret;
if (clk_pout)
ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV,
WM9713_PCMDIV(wm9713_div));
else
ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV,
WM9713_PCMDIV(wm9713_div));
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
return 0;
}
开发者ID:asdlei00，项目名称:Ace-i，代码行数:64，代码来源:zylonite.c
示例7: tegra_bt_hw_params
static int tegra_bt_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(rtd->cpu_dai);
#endif
struct snd_soc_card *card = rtd->card;
struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
int err, srate, mclk, min_mclk, sample_size;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
sample_size = 16;
break;
default:
return -EINVAL;
}
srate = params_rate(params);
switch (srate) {
case 11025:
case 22050:
case 44100:
case 88200:
mclk = 11289600;
break;
case 8000:
case 16000:
case 32000:
case 48000:
case 64000:
case 96000:
mclk = 12288000;
break;
default:
return -EINVAL;
}
min_mclk = 64 * srate;
err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
if (err < 0) {
if (!(machine->util_data.set_mclk % min_mclk))
mclk = machine->util_data.set_mclk;
else {
dev_err(card->dev, "Can't configure clocks\n");
return err;
}
}
tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);
err = snd_soc_dai_set_fmt(rtd->cpu_dai,
SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
if (err < 0) {
dev_err(rtd->codec->card->dev, "cpu_dai fmt not set\n");
return err;
}
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
tegra_max98088_set_dam_cif(i2s->dam_ifc, params_rate(params),
params_channels(params), sample_size, 0, 0, 0, 0);
#endif
return 0;
}
开发者ID:FileGD，项目名称:kernel-olympus-3.1，代码行数:69，代码来源:tegra_max98088.c
示例8: playback_prepare_params
/**
* Set default hardware params
*/
static int playback_prepare_params(struct gaudio_snd_dev *snd)
{
struct snd_pcm_substream *substream = snd->substream;
struct snd_pcm_hw_params *params;
snd_pcm_sframes_t result;
/*
* SNDRV_PCM_ACCESS_RW_INTERLEAVED,
* SNDRV_PCM_FORMAT_S16_LE
* CHANNELS: 2
* RATE: 8000
*/
snd->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
snd->format = SNDRV_PCM_FORMAT_S16_LE;
snd->channels = 2;
snd->rate = 8000;
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params)
return -ENOMEM;
_snd_pcm_hw_params_any(params);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
snd->access, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
snd->format, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
snd->channels, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
snd->rate, 0);
result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
if (result < 0)
pr_err("SNDRV_PCM_IOCTL_DROP failed: %d\n", (int)result);
result = snd_pcm_kernel_ioctl(substream,
SNDRV_PCM_IOCTL_HW_PARAMS, params);
if (result < 0) {
pr_err("SNDRV_PCM_IOCTL_HW_PARAMS failed: %d\n", (int)result);
kfree(params);
return result;
}
result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
if (result < 0)
pr_err("Preparing playback failed: %d\n", (int)result);
/* Store the hardware parameters */
snd->access = params_access(params);
snd->format = params_format(params);
snd->channels = params_channels(params);
snd->rate = params_rate(params);
kfree(params);
pr_debug("playback params: access %x, format %x, channels %d, rate %d\n",
snd->access, snd->format, snd->channels, snd->rate);
return 0;
}
开发者ID:KaoTD，项目名称:Nokia-RM-1013-2.0.0.11，代码行数:64，代码来源:u_uac1.c
示例9: dw_i2s_hw_params
static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
struct i2s_clk_config_data *config = &dev->config;
int ret;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
config->data_width = 16;
dev->ccr = 0x00;
dev->xfer_resolution = 0x02;
break;
case SNDRV_PCM_FORMAT_S24_LE:
config->data_width = 24;
dev->ccr = 0x08;
dev->xfer_resolution = 0x04;
break;
case SNDRV_PCM_FORMAT_S32_LE:
config->data_width = 32;
dev->ccr = 0x10;
dev->xfer_resolution = 0x05;
break;
default:
dev_err(dev->dev, "designware-i2s: unsupported PCM fmt");
return -EINVAL;
}
config->chan_nr = params_channels(params);
switch (config->chan_nr) {
case EIGHT_CHANNEL_SUPPORT:
case SIX_CHANNEL_SUPPORT:
case FOUR_CHANNEL_SUPPORT:
case TWO_CHANNEL_SUPPORT:
break;
default:
dev_err(dev->dev, "channel not supported\n");
return -EINVAL;
}
dw_i2s_config(dev, substream->stream);
i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
config->sample_rate = params_rate(params);
if (dev->capability & DW_I2S_MASTER) {
if (dev->i2s_clk_cfg) {
ret = dev->i2s_clk_cfg(config);
if (ret < 0) {
dev_err(dev->dev, "runtime audio clk config fail\n");
return ret;
}
} else {
u32 bitclk = config->sample_rate *
config->data_width * 2;
ret = clk_set_rate(dev->clk, bitclk);
if (ret) {
dev_err(dev->dev, "Can't set I2S clock rate: %d\n",
ret);
return ret;
}
}
}
return 0;
}
开发者ID:ReneNyffenegger，项目名称:linux，代码行数:71，代码来源:dwc-i2s.c
示例10: tegra_max98088_hw_params
static int tegra_max98088_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_card *card = codec->card;
struct tegra_max98088 *machine = snd_soc_card_get_drvdata(card);
#ifndef CONFIG_ARCH_TEGRA_2x_SOC
struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(cpu_dai);
#endif
int srate, mclk, sample_size, i2s_daifmt;
int err;
struct clk *clk;
int rate;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
sample_size = 16;
break;
default:
return -EINVAL;
}
srate = params_rate(params);
switch (srate) {
case 8000:
case 16000:
case 24000:
case 32000:
case 48000:
case 64000:
case 96000:
mclk = 12288000;
break;
case 11025:
case 22050:
case 44100:
case 88200:
mclk = 11289600;
break;
default:
mclk = 12000000;
break;
}
#if defined(CONFIG_ARCH_TEGRA_2x_SOC)
clk = clk_get_sys(NULL, "cdev1");
#else
clk = clk_get_sys("extern1", NULL);
#endif
if (IS_ERR(clk)) {
dev_err(card->dev, "Can't retrieve clk cdev1\n");
err = PTR_ERR(clk);
return err;
}
rate = clk_get_rate(clk);
printk("extern1 rate=%d\n",rate);
#if TEGRA30_I2S_MASTER_PLAYBACK
i2s_daifmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
#else
i2s_daifmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM;
mclk = rate;
#endif
err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
if (err < 0) {
if (!(machine->util_data.set_mclk % mclk))
mclk = machine->util_data.set_mclk;
else {
dev_err(card->dev, "Can't configure clocks\n");
return err;
}
}
tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);
err = snd_soc_dai_set_fmt(codec_dai,i2s_daifmt);
if (err < 0) {
dev_err(card->dev, "codec_dai fmt not set\n");
return err;
}
err = snd_soc_dai_set_fmt(cpu_dai, i2s_daifmt);
if (err < 0) {
dev_err(card->dev, "cpu_dai fmt not set\n");
return err;
}
err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
if (err < 0) {
//.........这里部分代码省略.........
开发者ID:FileGD，项目名称:kernel-olympus-3.1，代码行数:101，代码来源:tegra_max98088.c
示例11: arizona_hw_params
static int arizona_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
struct arizona_dai_priv *dai_priv = &priv->dai[dai->id - 1];
int base = dai->driver->base;
const int *rates;
int i;
int bclk, lrclk, wl, frame, sr_val;
if (params_rate(params) % 8000)
rates = &arizona_44k1_bclk_rates[0];
else
rates = &arizona_48k_bclk_rates[0];
for (i = 0; i < ARRAY_SIZE(arizona_44k1_bclk_rates); i++) {
if (rates[i] >= snd_soc_params_to_bclk(params) &&
rates[i] % params_rate(params) == 0) {
bclk = i;
break;
}
}
if (i == ARRAY_SIZE(arizona_44k1_bclk_rates)) {
arizona_aif_err(dai, "Unsupported sample rate %dHz\n",
params_rate(params));
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(arizona_sr_vals); i++)
if (arizona_sr_vals[i] == params_rate(params))
break;
if (i == ARRAY_SIZE(arizona_sr_vals)) {
arizona_aif_err(dai, "Unsupported sample rate %dHz\n",
params_rate(params));
return -EINVAL;
}
sr_val = i;
lrclk = rates[bclk] / params_rate(params);
arizona_aif_dbg(dai, "BCLK %dHz LRCLK %dHz\n",
rates[bclk], rates[bclk] / lrclk);
wl = snd_pcm_format_width(params_format(params));
frame = wl << ARIZONA_AIF1TX_WL_SHIFT | wl;
/*
* We will need to be more flexible than this in future,
* currently we use a single sample rate for SYSCLK.
*/
switch (dai_priv->clk) {
case ARIZONA_CLK_SYSCLK:
snd_soc_update_bits(codec, ARIZONA_SAMPLE_RATE_1,
ARIZONA_SAMPLE_RATE_1_MASK, sr_val);
snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
ARIZONA_AIF1_RATE_MASK, 0);
break;
case ARIZONA_CLK_ASYNCCLK:
snd_soc_update_bits(codec, ARIZONA_ASYNC_SAMPLE_RATE_1,
ARIZONA_ASYNC_SAMPLE_RATE_MASK, sr_val);
snd_soc_update_bits(codec, base + ARIZONA_AIF_RATE_CTRL,
ARIZONA_AIF1_RATE_MASK,
8 << ARIZONA_AIF1_RATE_SHIFT);
break;
default:
arizona_aif_err(dai, "Invalid clock %d\n", dai_priv->clk);
return -EINVAL;
}
snd_soc_update_bits(codec, base + ARIZONA_AIF_BCLK_CTRL,
ARIZONA_AIF1_BCLK_FREQ_MASK, bclk);
snd_soc_update_bits(codec, base + ARIZONA_AIF_TX_BCLK_RATE,
ARIZONA_AIF1TX_BCPF_MASK, lrclk);
snd_soc_update_bits(codec, base + ARIZONA_AIF_RX_BCLK_RATE,
ARIZONA_AIF1RX_BCPF_MASK, lrclk);
snd_soc_update_bits(codec, base + ARIZONA_AIF_FRAME_CTRL_1,
ARIZONA_AIF1TX_WL_MASK |
ARIZONA_AIF1TX_SLOT_LEN_MASK, frame);
snd_soc_update_bits(codec, base + ARIZONA_AIF_FRAME_CTRL_2,
ARIZONA_AIF1RX_WL_MASK |
ARIZONA_AIF1RX_SLOT_LEN_MASK, frame);
return 0;
}
开发者ID:AdrianHuang，项目名称:linux-3.8.13，代码行数:86，代码来源:arizona.c
示例12: lpass_cpu_daiops_hw_params
static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
snd_pcm_format_t format = params_format(params);
unsigned int channels = params_channels(params);
unsigned int rate = params_rate(params);
unsigned int regval;
int bitwidth, ret;
bitwidth = snd_pcm_format_width(format);
if (bitwidth < 0) {
dev_err(dai->dev, "%s() invalid bit width given: %d\n",
__func__, bitwidth);
return bitwidth;
}
regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
LPAIF_I2SCTL_WSSRC_INTERNAL;
switch (bitwidth) {
case 16:
regval |= LPAIF_I2SCTL_BITWIDTH_16;
break;
case 24:
regval |= LPAIF_I2SCTL_BITWIDTH_24;
break;
case 32:
regval |= LPAIF_I2SCTL_BITWIDTH_32;
break;
default:
dev_err(dai->dev, "%s() invalid bitwidth given: %d\n",
__func__, bitwidth);
return -EINVAL;
}
switch (channels) {
case 1:
regval |= LPAIF_I2SCTL_SPKMODE_SD0;
regval |= LPAIF_I2SCTL_SPKMONO_MONO;
break;
case 2:
regval |= LPAIF_I2SCTL_SPKMODE_SD0;
regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
break;
case 4:
regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
break;
case 6:
regval |= LPAIF_I2SCTL_SPKMODE_6CH;
regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
break;
case 8:
regval |= LPAIF_I2SCTL_SPKMODE_8CH;
regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
break;
default:
dev_err(dai->dev, "%s() invalid channels given: %u\n",
__func__, channels);
return -EINVAL;
}
ret = regmap_write(drvdata->lpaif_map,
LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
regval);
if (ret) {
dev_err(dai->dev, "%s() error writing to i2sctl reg: %d\n",
__func__, ret);
return ret;
}
ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->driver->id],
rate * bitwidth * 2);
if (ret) {
dev_err(dai->dev, "%s() error setting mi2s bitclk to %u: %d\n",
__func__, rate * bitwidth * 2, ret);
return ret;
}
return 0;
}
开发者ID:a2hojsjsjs，项目名称:linux，代码行数:82，代码来源:lpass-cpu.c
示例13: wm8776_hw_params
static int wm8776_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
int iface_reg, iface;
int ratio_shift, master;
int i;
switch (dai->driver->id) {
case WM8776_DAI_DAC:
iface_reg = WM8776_DACIFCTRL;
master = 0x80;
ratio_shift = 4;
break;
case WM8776_DAI_ADC:
iface_reg = WM8776_ADCIFCTRL;
master = 0x100;
ratio_shift = 0;
break;
default:
return -EINVAL;
}
/* Set word length */
switch (snd_pcm_format_width(params_format(params))) {
case 16:
iface = 0;
break;
case 20:
iface = 0x10;
break;
case 24:
iface = 0x20;
break;
case 32:
iface = 0x30;
break;
default:
dev_err(codec->dev, "Unsupported sample size: %i\n",
snd_pcm_format_width(params_format(params)));
return -EINVAL;
}
/* Only need to set MCLK/LRCLK ratio if we're master */
if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
if (wm8776->sysclk[dai->driver->id] / params_rate(params)
== mclk_ratios[i])
break;
}
if (i == ARRAY_SIZE(mclk_ratios)) {
dev_err(codec->dev,
"Unable to configure MCLK ratio %d/%d\n",
wm8776->sysclk[dai->driver->id], params_rate(params));
return -EINVAL;
}
dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
snd_soc_update_bits(codec, WM8776_MSTRCTRL,
0x7 << ratio_shift, i << ratio_shift);
} else {
dev_dbg(codec->dev, "DAI in slave mode\n");
}
snd_soc_update_bits(codec, iface_reg, 0x30, iface);
return 0;
}
开发者ID:454053205，项目名称:linux，代码行数:72，代码来源:wm8776.c
示例14: snd_soc_dai_set_pll
/* Switch the FLL */
ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
WM8994_FLL_SRC_MCLK1, MIDAS_DEFAULT_MCLK1,
pll_out);
if (ret < 0)
dev_err(codec_dai->dev, "Unable to start FLL1: %d\n", ret);
ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
pll_out, SND_SOC_CLOCK_IN);
if (ret < 0) {
dev_err(codec_dai->dev, "Unable to switch to FLL1: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK,
0, MOD_OPCLK_PCLK);
if (ret < 0)
return ret;
#else
midas_start_fll1(codec_dai);
#endif
if (ret < 0)
return ret;
dev_info(codec_dai->dev, "%s --\n", __func__);
return 0;
}
#else /* CONFIG_SND_SAMSUNG_I2S_MASTER */
static int midas_wm1811_aif1_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int bfs, psr, rfs, ret;
unsigned long rclk;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_U24:
case SNDRV_PCM_FORMAT_S24:
bfs = 48;
break;
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
bfs = 32;
break;
default:
return -EINVAL;
}
switch (params_rate(params)) {
case 16000:
case 22050:
case 24000:
case 32000:
case 44100:
case 48000:
case 88200:
case 96000:
if (bfs == 48)
rfs = 384;
else
rfs = 256;
break;
case 64000:
rfs = 384;
break;
case 8000:
case 11025:
case 12000:
if (bfs == 48)
rfs = 768;
else
rfs = 512;
break;
default:
return -EINVAL;
}
rclk = params_rate(params) * rfs;
switch (rclk) {
case 4096000:
case 5644800:
case 6144000:
case 8467200:
case 9216000:
psr = 8;
break;
case 8192000:
case 11289600:
case 12288000:
case 16934400:
case 18432000:
psr = 4;
break;
case 22579200:
case 24576000:
//.........这里部分代码省略.........
开发者ID:neobuddy89，项目名称:NX-Kernel，代码行数:101，代码来源:midas_wm1811.c
示例15: capture_prepare_params
static int capture_prepare_params(struct gaudio_snd_dev *snd)
{
struct snd_pcm_substream *substream = snd->substream;
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_pcm_hw_params *params;
struct snd_pcm_sw_params *swparams;
unsigned long period_size;
unsigned long buffer_size;
snd_pcm_sframes_t result = 0;
/*
* SNDRV_PCM_ACCESS_RW_INTERLEAVED,
* SNDRV_PCM_FORMAT_S16_LE
* CHANNELS: 1
* RATE: 8000
*/
snd->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
snd->format = SNDRV_PCM_FORMAT_S16_LE;
snd->channels = 1;
snd->rate = 8000;
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params) {
pr_err("Failed to allocate hw params");
return -ENOMEM;
}
_snd_pcm_hw_params_any(params);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
snd->access, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
snd->format, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
snd->channels, 0);
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
snd->rate, 0);
result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
if (result < 0)
pr_err("SNDRV_PCM_IOCTL_DROP failed: %d\n", (int)result);
result = snd_pcm_kernel_ioctl(substream,
SNDRV_PCM_IOCTL_HW_PARAMS, params);
if (result < 0) {
pr_err("SNDRV_PCM_IOCTL_HW_PARAMS failed: %d\n", (int)result);
kfree(params);
return result;
}
result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE,
NULL);
if (result < 0)
pr_err("Preparing capture failed: %d\n", (int)result);
/* Store the hardware parameters */
snd->access = params_access(params);
snd->format = params_format(params);
snd->channels = params_channels(params);
snd->rate = params_rate(params);
runtime->frame_bits = snd_pcm_format_physical_width(runtime->format);
/*Fix the issue:Passing freed pointer "params" as an argument to function "pcm_buffer_size"*/
buffer_size = pcm_buffer_size(params);
period_size = pcm_period_size(params);
kfree(params);
swparams = kzalloc(sizeof(*swparams), GFP_KERNEL);
if (!swparams) {
pr_err("Failed to allocate sw params");
return -ENOMEM;
}
swparams->avail_min = period_size/2;
swparams->xfer_align = period_size/2;
swparams->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
swparams->period_step = 1;
swparams->start_threshold = 1;
swparams->stop_threshold = INT_MAX;
swparams->silence_size = 0;
swparams->silence_threshold = 0;
result = snd_pcm_kernel_ioctl(substream,
SNDRV_PCM_IOCTL_SW_PARAMS, swparams);
if (result < 0)
pr_err("SNDRV_PCM_IOCTL_SW_PARAMS failed: %d\n", (int)result);
kfree(swparams);
pr_debug("capture params: access %x, format %x, channels %d, rate %d\n",
snd->access, snd->format, snd->channels, snd->rate);
return result;
}
开发者ID:KaoTD，项目名称:Nokia-RM-1013-2.0.0.11，代码行数:94，代码来源:u_uac1.c
示例16: at32_ssc_hw_params
/*
* Configure the SSC
*/
static int at32_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int id = rtd->dai->cpu_dai->id;
struct at32_ssc_info *ssc_p = &ssc_info[id];
struct at32_pcm_dma_params *dma_params;
int channels, bits;
u32 tfmr, rfmr, tcmr, rcmr;
int start_event;
int ret;
/*
* Currently, there is only one set of dma_params for each direction.
* If more are added, this code will have to be changed to select
* the proper set
*/
dma_params = &ssc_dma_params[id][substream->stream];
dma_params->ssc = ssc_p->ssc;
dma_params->substream = substream;
ssc_p->dma_params[substream->stream] = dma_params;
/*
* The cpu_dai->dma_data field is only used to communicate the
* appropriate DMA parameters to the PCM driver's hw_params()
* function. It should not be used for other purposes as it
* is common to all substreams.
*/
rtd->dai->cpu_dai->dma_data = dma_params;
channels = params_channels(params);
/*
* Determine sample size in bits and the PDC increment
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bits = 8;
dma_params->pdc_xfer_size = 1;
break;
case SNDRV_PCM_FORMAT_S16:
bits = 16;
dma_params->pdc_xfer_size = 2;
break;
case SNDRV_PCM_FORMAT_S24:
bits = 24;
dma_params->pdc_xfer_size = 4;
break;
case SNDRV_PCM_FORMAT_S32:
bits = 32;
dma_params->pdc_xfer_size = 4;
break;
default:
pr_warning("at32-ssc: Unsupported PCM format %d",
params_format(params));
return -EINVAL;
}
pr_debug("at32-ssc: bits = %d, pdc_xfer_size = %d, channels = %d\n",
bits, dma_params->pdc_xfer_size, channels);
/*
* The SSC only supports up to 16-bit samples in I2S format, due
* to the size of the Frame Mode Register FSLEN field.
*/
if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S)
if (bits > 16) {
pr_warning("at32-ssc: "
"sample size %d is too large for I2S\n",
bits);
return -EINVAL;
}
/*
* Compute the SSC register settings
*/
switch (ssc_p->daifmt & (SND_SOC_DAIFMT_FORMAT_MASK |
SND_SOC_DAIFMT_MASTER_MASK)) {
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
/*
* I2S format, SSC provides BCLK and LRS clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output on the SSC TK line
*/
pr_debug("at32-ssc: SSC mode is I2S BCLK / FRAME master\n");
rcmr = (SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period) |
SSC_BF(RCMR_STTDLY, START_DELAY) |
//.........这里部分代码省略.........
开发者ID:LouZiffer，项目名称:m900_kernel_cupcake-SDX，代码行数:101，代码来源:at32-ssc.c
示例17: wm8770_hw_params
static int wm8770_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec;
struct wm8770_priv *wm8770;
int i;
int iface;
int shift;
int ratio;
codec = dai->codec;
wm8770 = snd_soc_codec_get_drvdata(codec);
iface = 0;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= 0x10;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= 0x20;
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= 0x30;
break;
}
switch (substream->stream) {
case SNDRV_PCM_STREAM_PLAYBACK:
i = 0;
shift = 4;
break;
case SNDRV_PCM_STREAM_CAPTURE:
i = 2;
shift = 0;
break;
default:
return -EINVAL;
}
/* Only need to set MCLK/LRCLK ratio if we're master */
if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
ratio = wm8770->sysclk / params_rate(params);
if (ratio == mclk_ratios[i])
break;
}
if (i == ARRAY_SIZE(mclk_ratios)) {
dev_err(codec->dev,
"Unable to configure MCLK ratio %d/%d\n",
wm8770->sysclk, params_rate(params));
return -EINVAL;
}
dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
i << shift);
}
snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);
return 0;
}
开发者ID:404992361，项目名称:mi1_kernel，代码行数:67，代码来源:wm8770.c
示例18: smdk_hw_params
static int smdk_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
unsigned int pll_out;
int bfs, rfs, ret;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_U8:
case SNDRV_PCM_FORMAT_S8:
bfs = 16;
break;
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
bfs = 32;
break;
default:
return -EINVAL;
}
/* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
* This criterion can't be met if we request PLL output
* as {8000x256, 64000x256, 11025x256}Hz.
* As a wayout, we rather change rfs to a minimum value that
* results in (params_rate(params) * rfs), and itself, acceptable
* to both - the CODEC and the CPU.
*/
switch (params_rate(params)) {
case 16000:
case 22050:
case 32000:
case 44100:
case 48000:
case 88200:
case 96000:
rfs = 256;
break;
case 64000:
rfs = 384;
break;
case 8000:
case 11025:
rfs = 512;
break;
default:
return -EINVAL;
}
pll_out = params_rate(params) * rfs;
/* Set the Codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* Set the AP DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* Set WM8580 to drive MCLK from i
|
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