sound: usb: Add support for parsing AudioStreaming intf for BADD devices
BADD(Basic Audio Device Definition) is a subset of UAC3
specifications. It defines standard profiles which provide
specific attributes of class descriptors. BADD audio device
provides profile id and BADD supporting host will infer
attributes from profile-id.
Currently USB Audio Host driver has support for UAC1
and UAC2 devices. To handle BADD 3.0 devices, AudioControl
and AudioStreaming Interfaces have to be properly parsed.
The Host has to derive all class-specific information based
on the profile ID that the device exposes. Add support for
parsing the AudioStreaming interfaces exposed by the device.
Change-Id: I726bbb735708fe8e395011c7228a73d5f65c092d
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 7437cd5..5bc84b4 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -20,6 +20,7 @@
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -282,8 +283,6 @@ static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
0 /* terminator */
};
struct snd_pcm_chmap_elem *chmap;
- const unsigned int *maps;
- int c;
if (channels > ARRAY_SIZE(chmap->map))
return NULL;
@@ -292,26 +291,41 @@ static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
if (!chmap)
return NULL;
- maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
chmap->channels = channels;
- c = 0;
- if (bits) {
- for (; bits && *maps; maps++, bits >>= 1)
- if (bits & 1)
- chmap->map[c++] = *maps;
+ if (protocol == UAC_VERSION_3) {
+ switch (channels) {
+ case 1:
+ chmap->map[0] = SNDRV_CHMAP_MONO;
+ break;
+ case 2:
+ chmap->map[0] = SNDRV_CHMAP_FL;
+ chmap->map[1] = SNDRV_CHMAP_FR;
+ break;
+ }
} else {
- /* If we're missing wChannelConfig, then guess something
- to make sure the channel map is not skipped entirely */
- if (channels == 1)
- chmap->map[c++] = SNDRV_CHMAP_MONO;
- else
- for (; c < channels && *maps; maps++)
- chmap->map[c++] = *maps;
- }
+ int c = 0;
+ const unsigned int *maps =
+ protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
- for (; c < channels; c++)
- chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
+ if (bits) {
+ for (; bits && *maps; maps++, bits >>= 1)
+ if (bits & 1)
+ chmap->map[c++] = *maps;
+ } else {
+ /*
+ * If we're missing wChannelConfig, then guess something
+ * to make sure the channel map is not skipped entirely
+ */
+ if (channels == 1)
+ chmap->map[c++] = SNDRV_CHMAP_MONO;
+ else
+ for (; c < channels && *maps; maps++)
+ chmap->map[c++] = *maps;
+ }
+ for (; c < channels; c++)
+ chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
+ }
return chmap;
}
@@ -409,6 +423,9 @@ static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
struct usb_interface_descriptor *altsd = get_iface_desc(alts);
int attributes = 0;
+ if (protocol == UAC_VERSION_3)
+ return 0;
+
csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
/* Creamware Noah has this descriptor after the 2nd endpoint */
@@ -492,7 +509,7 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
unsigned int format = 0, num_channels = 0;
struct audioformat *fp = NULL;
int num, protocol, clock = 0;
- struct uac_format_type_i_continuous_descriptor *fmt;
+ struct uac_format_type_i_continuous_descriptor *fmt = NULL;
unsigned int chconfig;
dev = chip->dev;
@@ -629,38 +646,78 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
iface_no, altno, as->bTerminalLink);
continue;
}
+
+ case UAC_VERSION_3: {
+ int wMaxPacketSize;
+
+ format = UAC_FORMAT_TYPE_I_PCM;
+ clock = BADD_CLOCK_SOURCE;
+ wMaxPacketSize = le16_to_cpu(get_endpoint(alts, 0)
+ ->wMaxPacketSize);
+ switch (wMaxPacketSize) {
+ case BADD_MAXPSIZE_SYNC_MONO_16:
+ case BADD_MAXPSIZE_SYNC_MONO_24:
+ case BADD_MAXPSIZE_ASYNC_MONO_16:
+ case BADD_MAXPSIZE_ASYNC_MONO_24: {
+ num_channels = NUM_CHANNELS_MONO;
+ chconfig = BADD_CH_CONFIG_MONO;
+ break;
+ }
+
+ case BADD_MAXPSIZE_SYNC_STEREO_16:
+ case BADD_MAXPSIZE_SYNC_STEREO_24:
+ case BADD_MAXPSIZE_ASYNC_STEREO_16:
+ case BADD_MAXPSIZE_ASYNC_STEREO_24: {
+ num_channels = NUM_CHANNELS_STEREO;
+ chconfig = BADD_CH_CONFIG_STEREO;
+ break;
+ }
+ default:
+ dev_err(&dev->dev,
+ "%u:%d: invalid wMaxPacketSize\n",
+ iface_no, altno);
+ continue;
+ }
+ }
}
- /* get format type */
- fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
- if (!fmt) {
- dev_err(&dev->dev,
- "%u:%d : no UAC_FORMAT_TYPE desc\n",
- iface_no, altno);
- continue;
- }
- if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
- ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
- dev_err(&dev->dev,
- "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
- iface_no, altno);
- continue;
- }
+ if ((protocol == UAC_VERSION_1) ||
+ (protocol == UAC_VERSION_2)) {
+ /* get format type */
+ fmt = snd_usb_find_csint_desc(alts->extra,
+ alts->extralen, NULL, UAC_FORMAT_TYPE);
+ if (!fmt) {
+ dev_err(&dev->dev,
+ "%u:%d : no UAC_FORMAT_TYPE desc\n",
+ iface_no, altno);
+ continue;
+ }
+ if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
+ || ((protocol == UAC_VERSION_2) &&
+ (fmt->bLength < 6))) {
+ dev_err(&dev->dev,
+ "%u:%d :invalid UAC_FORMAT_TYPE desc\n",
+ iface_no, altno);
+ continue;
+ }
- /*
- * Blue Microphones workaround: The last altsetting is identical
- * with the previous one, except for a larger packet size, but
- * is actually a mislabeled two-channel setting; ignore it.
- */
- if (fmt->bNrChannels == 1 &&
- fmt->bSubframeSize == 2 &&
- altno == 2 && num == 3 &&
- fp && fp->altsetting == 1 && fp->channels == 1 &&
- fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
- protocol == UAC_VERSION_1 &&
- le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
+ /*
+ * Blue Microphones workaround: The last altsetting is
+ * identical with the previous one, except for a larger
+ * packet size, but is actually a mislabeled two-channel
+ * setting; ignore it.
+ */
+ if (fmt->bNrChannels == 1 &&
+ fmt->bSubframeSize == 2 &&
+ altno == 2 && num == 3 &&
+ fp && fp->altsetting == 1 && fp->channels == 1 &&
+ fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
+ protocol == UAC_VERSION_1 &&
+ le16_to_cpu(
+ get_endpoint(alts, 0)->wMaxPacketSize) ==
fp->maxpacksize * 2)
- continue;
+ continue;
+ }
fp = kzalloc(sizeof(*fp), GFP_KERNEL);
if (! fp) {