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cxd56: Add input support to Spresense audio driver

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Add recording support to the Nuttx audio driver for Spresense.
- Supports 16 bit data with 48 kHz sample rate only for now.
- Supports 1 (dual mono) 2 or 4 channels.
- Only analog mics have been tested so digital is considered
  unsupported.
This commit is contained in:
Tobias Johansson
2020-05-07 11:08:08 +02:00
committed by patacongo
parent 610fa1aadc
commit f2c957144a
3 changed files with 1375 additions and 150 deletions
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boards/arm/cxd56xx/common/src/cxd56_audio.c
+28 -3
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@@ -476,7 +476,7 @@ void board_audio_finalize(void)
*
****************************************************************************/
static struct cxd56_lower_s g_cxd56_lower;
static struct cxd56_lower_s g_cxd56_lower[2];
int board_audio_initialize_driver(int minor)
{
@@ -485,9 +485,9 @@ int board_audio_initialize_driver(int minor)
char devname[12];
int ret;
/* Initialize CXD56 device driver */
/* Initialize CXD56 output device driver */
cxd56 = cxd56_initialize(&g_cxd56_lower);
cxd56 = cxd56_initialize(&g_cxd56_lower[0]);
if (!cxd56)
{
auderr("ERROR: Failed to initialize the CXD56 audio\n");
@@ -518,5 +518,30 @@ int board_audio_initialize_driver(int minor)
devname, ret);
}
/* Initialize CXD56 input device driver */
cxd56 = cxd56_initialize(&g_cxd56_lower[1]);
if (!cxd56)
{
auderr("ERROR: Failed to initialize the CXD56 audio\n");
return -ENODEV;
}
/* No decoder support at the moment, only raw PCM data. */
/* Create a device name */
snprintf(devname, 12, "pcm_in%d", minor);
/* Finally, we can register the CXD56 audio input device. */
ret = audio_register(devname, cxd56);
if (ret < 0)
{
auderr("ERROR: Failed to register /dev/%s device: %d\n",
devname, ret);
}
return ret;
}
drivers/audio/cxd56.c
+1308 -146
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File diff suppressed because it is too large Load Diff
drivers/audio/cxd56.h
+39 -1
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@@ -169,6 +169,43 @@
# define CXD56_SP_DRIVER 3
#endif
/* Mic bias voltage select */
#define CXD56_MIC_BIAS_20V 1
#define CXD56_MIC_BIAS_28V 2
#if defined(CONFIG_CXD56_AUDIO_MICBIAS_20V)
# define CXD56_MIC_BIAS CXD56_MIC_BIAS_20V
#else
# define CXD56_MIC_BIAS CXD56_MIC_BIAS_28V
#endif
/* Mic select */
#define CXD56_AUDIO_CFG_MIC CONFIG_CXD56_AUDIO_MIC_CHANNEL_SEL
/* Mic boot wait time */
#if defined(CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT)
#define CXD56_MIC_BOOT_WAIT CONFIG_CXD56_AUDIO_MIC_BOOT_WAIT
#else
#define CXD56_MIC_BOOT_WAIT 1100
#endif
/* CIC filter input path */
#define CXD56_AUDIO_CFG_CIC_IN_SEL_NONE 0
#define CXD56_AUDIO_CFG_CIC_IN_SEL_CXD 1
#define CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF 2
#if defined(CONFIG_CXD56_AUDIO_CIC_IN_SEL_CXD)
# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_CXD
#elif defined (CONFIG_CXD56_AUDIO_CIC_IN_SEL_DMIC)
# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_DMICIF
#else
# define CXD56_AUDIO_CFG_CIC_IN CXD56_AUDIO_CFG_CIC_IN_SEL_NONE
#endif
/* DMA format */
#define CXD56_DMA_FORMAT_LR 0
@@ -243,7 +280,8 @@ struct cxd56_dev_s
#endif /* CONFIG_AUDIO_EXCLUDE_VOLUME */
uint8_t channels; /* Number of channels (1..8) */
/* enum cxd56_audio_samp_fmt_e format; */ /* Output bits per sample (16 or 24) */
uint16_t mic_gain; /* Mic gain */
uint64_t mic_boot_start; /* Mic startup wait time */
uint8_t bitwidth; /* Bits per sample (16 or 24) */
bool muted; /* True: Output is muted */