mirror of https://gitee.com/openkylin/linux.git
[ALSA] soc - ASoC 0.13 AT91xxxx Eti_B1 board support
This patch updates the EtI B1 machine driver to the new API in ASoC 0.13. Changes:- o Manually configure DAI hardware format. o Removed config_sysclk() function. No longer needed as clocking is now configured manually. Signed-off-by: Frank Mandarino <fmandarino@endrelia.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Frank Mandarino
Jaroslav Kysela
parent
6297027629
commit
c8044274c7
|
|
@ -18,9 +18,6 @@
|
|||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*
|
||||
* Revision history
|
||||
* 30th Nov 2005 Initial version.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
|
|
@ -43,9 +40,10 @@
|
|||
|
||||
#include "../codecs/wm8731.h"
|
||||
#include "at91-pcm.h"
|
||||
#include "at91-i2s.h"
|
||||
|
||||
#if 0
|
||||
#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x)
|
||||
#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731: " x)
|
||||
#else
|
||||
#define DBG(x...)
|
||||
#endif
|
||||
|
|
@ -57,12 +55,29 @@
|
|||
#define AT91_PIO_RK1 (1 << (AT91_PIN_PB10 - PIN_BASE) % 32)
|
||||
#define AT91_PIO_RF1 (1 << (AT91_PIN_PB11 - PIN_BASE) % 32)
|
||||
|
||||
|
||||
static struct clk *pck1_clk;
|
||||
static struct clk *pllb_clk;
|
||||
|
||||
|
||||
static int eti_b1_startup(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
|
||||
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
|
||||
int ret;
|
||||
|
||||
/* cpu clock is the AT91 master clock sent to the SSC */
|
||||
ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, AT91_SYSCLK_MCK,
|
||||
60000000, SND_SOC_CLOCK_IN);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* codec system clock is supplied by PCK1, set to 12MHz */
|
||||
ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8731_SYSCLK,
|
||||
12000000, SND_SOC_CLOCK_IN);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Start PCK1 clock. */
|
||||
clk_enable(pck1_clk);
|
||||
DBG("pck1 started\n");
|
||||
|
|
@ -77,8 +92,105 @@ static void eti_b1_shutdown(struct snd_pcm_substream *substream)
|
|||
DBG("pck1 stopped\n");
|
||||
}
|
||||
|
||||
static int eti_b1_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_codec_dai *codec_dai = rtd->dai->codec_dai;
|
||||
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
|
||||
int ret;
|
||||
|
||||
#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
|
||||
unsigned int rate;
|
||||
int cmr_div, period;
|
||||
|
||||
/* set codec DAI configuration */
|
||||
ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
|
||||
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* set cpu DAI configuration */
|
||||
ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
|
||||
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* The SSC clock dividers depend on the sample rate. The CMR.DIV
|
||||
* field divides the system master clock MCK to drive the SSC TK
|
||||
* signal which provides the codec BCLK. The TCMR.PERIOD and
|
||||
* RCMR.PERIOD fields further divide the BCLK signal to drive
|
||||
* the SSC TF and RF signals which provide the codec DACLRC and
|
||||
* ADCLRC clocks.
|
||||
*
|
||||
* The dividers were determined through trial and error, where a
|
||||
* CMR.DIV value is chosen such that the resulting BCLK value is
|
||||
* divisible, or almost divisible, by (2 * sample rate), and then
|
||||
* the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1.
|
||||
*/
|
||||
rate = params_rate(params);
|
||||
|
||||
switch (rate) {
|
||||
case 8000:
|
||||
cmr_div = 25; /* BCLK = 60MHz/(2*25) = 1.2MHz */
|
||||
period = 74; /* LRC = BCLK/(2*(74+1)) = 8000Hz */
|
||||
break;
|
||||
case 32000:
|
||||
cmr_div = 7; /* BCLK = 60MHz/(2*7) ~= 4.28571428MHz */
|
||||
period = 66; /* LRC = BCLK/(2*(66+1)) = 31982.942Hz */
|
||||
break;
|
||||
case 48000:
|
||||
cmr_div = 13; /* BCLK = 60MHz/(2*13) ~= 2.3076923MHz */
|
||||
period = 23; /* LRC = BCLK/(2*(23+1)) = 48076.923Hz */
|
||||
break;
|
||||
default:
|
||||
printk(KERN_WARNING "unsupported rate %d on ETI-B1 board\n", rate);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* set the MCK divider for BCLK */
|
||||
ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, AT91SSC_CMR_DIV, cmr_div);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
/* set the BCLK divider for DACLRC */
|
||||
ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai,
|
||||
AT91SSC_TCMR_PERIOD, period);
|
||||
} else {
|
||||
/* set the BCLK divider for ADCLRC */
|
||||
ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai,
|
||||
AT91SSC_RCMR_PERIOD, period);
|
||||
}
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
#else /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
|
||||
/*
|
||||
* Codec in Master Mode.
|
||||
*/
|
||||
|
||||
/* set codec DAI configuration */
|
||||
ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
|
||||
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* set cpu DAI configuration */
|
||||
ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
|
||||
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
#endif /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_soc_ops eti_b1_ops = {
|
||||
.startup = eti_b1_startup,
|
||||
.hw_params = eti_b1_hw_params,
|
||||
.shutdown = eti_b1_shutdown,
|
||||
};
|
||||
|
||||
|
|
@ -134,29 +246,19 @@ static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
|
|||
return 0;
|
||||
}
|
||||
|
||||
unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd,
|
||||
struct snd_soc_clock_info *info)
|
||||
{
|
||||
if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
|
||||
return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_soc_dai_link eti_b1_dai = {
|
||||
.name = "WM8731",
|
||||
.stream_name = "WM8731",
|
||||
.cpu_dai = &at91_i2s_dai[1],
|
||||
.codec_dai = &wm8731_dai,
|
||||
.init = eti_b1_wm8731_init,
|
||||
.config_sysclk = eti_b1_config_sysclk,
|
||||
.ops = &eti_b1_ops,
|
||||
};
|
||||
|
||||
static struct snd_soc_machine snd_soc_machine_eti_b1 = {
|
||||
.name = "ETI_B1",
|
||||
.dai_link = &eti_b1_dai,
|
||||
.num_links = 1,
|
||||
.ops = &eti_b1_ops,
|
||||
};
|
||||
|
||||
static struct wm8731_setup_data eti_b1_wm8731_setup = {
|
||||
|
|
@ -210,7 +312,7 @@ static int __init eti_b1_init(void)
|
|||
}
|
||||
|
||||
ssc_pio_lines = AT91_PIO_TF1 | AT91_PIO_TK1 | AT91_PIO_TD1
|
||||
| AT91_PIO_RD1 /* | AT91_PIO_RK1 | AT91_PIO_RF1 */;
|
||||
| AT91_PIO_RD1 /* | AT91_PIO_RK1 */ | AT91_PIO_RF1;
|
||||
|
||||
/* Reset all PIO registers and assign lines to peripheral A */
|
||||
at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
|
||||
|
|
@ -237,6 +339,11 @@ static int __init eti_b1_init(void)
|
|||
/* assign the GPIO pin to PCK1 */
|
||||
at91_set_B_periph(AT91_PIN_PA24, 0);
|
||||
|
||||
#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
|
||||
printk(KERN_INFO "eti_b1_wm8731: Codec in Slave Mode\n");
|
||||
#else
|
||||
printk(KERN_INFO "eti_b1_wm8731: Codec in Master Mode\n");
|
||||
#endif
|
||||
return ret;
|
||||
|
||||
fail_io_unmap:
|
||||
|
|
|
|||
Loading…
Reference in New Issue