Add support for sample rates other than 44100Khz on raumfeld audio
devices. At startup time, call snd_soc_dai_set_sysclk() with 0 as 'freq'
argument so it offers all the sample rates. Later, the function is
called again to give proper constraints.
Use the external audio clock generator to provide double data rate
clocks as the PXA's internal baud generator does anything but what's
described in the datasheets.
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Timur Tabi <timur@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
};
#define MAX9485_MCLK_FREQ_112896 0x22
};
#define MAX9485_MCLK_FREQ_112896 0x22
-#define MAX9485_MCLK_FREQ_122880 0x23
+#define MAX9485_MCLK_FREQ_122880 0x23
+#define MAX9485_MCLK_FREQ_225792 0x32
+#define MAX9485_MCLK_FREQ_245760 0x33
static void set_max9485_clk(char clk)
{
static void set_max9485_clk(char clk)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
- set_max9485_clk(MAX9485_MCLK_FREQ_112896);
+ /* set freq to 0 to enable all possible codec sample rates */
+ return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
+}
- return snd_soc_dai_set_sysclk(codec_dai, 0, 11289600, 0);
+static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+
+ /* set freq to 0 to enable all possible codec sample rates */
+ snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
}
static int raumfeld_cs4270_hw_params(struct snd_pcm_substream *substream,
}
static int raumfeld_cs4270_hw_params(struct snd_pcm_substream *substream,
int ret = 0;
switch (params_rate(params)) {
int ret = 0;
switch (params_rate(params)) {
- case 8000:
- case 16000:
+ case 44100:
+ set_max9485_clk(MAX9485_MCLK_FREQ_112896);
+ clk = 11289600;
+ break;
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
clk = 12288000;
break;
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
clk = 12288000;
break;
- case 11025:
- case 22050:
- case 44100:
- set_max9485_clk(MAX9485_MCLK_FREQ_112896);
- clk = 11289600;
+ set_max9485_clk(MAX9485_MCLK_FREQ_225792);
+ clk = 22579200;
+ case 96000:
+ set_max9485_clk(MAX9485_MCLK_FREQ_245760);
+ clk = 24576000;
+ break;
+ default:
+ return -EINVAL;
}
fmt = SND_SOC_DAIFMT_I2S |
}
fmt = SND_SOC_DAIFMT_I2S |
- ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, 0, 1);
+ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
static struct snd_soc_ops raumfeld_cs4270_ops = {
.startup = raumfeld_cs4270_startup,
static struct snd_soc_ops raumfeld_cs4270_ops = {
.startup = raumfeld_cs4270_startup,
+ .shutdown = raumfeld_cs4270_shutdown,
.hw_params = raumfeld_cs4270_hw_params,
};
.hw_params = raumfeld_cs4270_hw_params,
};
int fmt, ret = 0, clk = 0;
switch (params_rate(params)) {
int fmt, ret = 0, clk = 0;
switch (params_rate(params)) {
- case 8000:
- case 16000:
+ case 44100:
+ set_max9485_clk(MAX9485_MCLK_FREQ_112896);
+ clk = 11289600;
+ break;
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
clk = 12288000;
break;
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
clk = 12288000;
break;
- case 11025:
- case 22050:
- case 44100:
- set_max9485_clk(MAX9485_MCLK_FREQ_112896);
- clk = 11289600;
+ set_max9485_clk(MAX9485_MCLK_FREQ_225792);
+ clk = 22579200;
+ break;
+ case 96000:
+ set_max9485_clk(MAX9485_MCLK_FREQ_245760);
+ clk = 24576000;
+ default:
+ return -EINVAL;
}
fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
}
fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
- ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, 0, 1);
+ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);