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-rw-r--r--sound/usb/quirks.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 3879eae7e874..5b01330b8452 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/audio.h>
+#include <linux/usb/midi.h>
#include <sound/control.h>
#include <sound/core.h>
@@ -175,6 +176,212 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
return 0;
}
+static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver)
+{
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ struct usb_endpoint_descriptor *epd;
+ struct uac1_as_header_descriptor *ashd;
+ struct uac_format_type_i_discrete_descriptor *fmtd;
+
+ /*
+ * Most Roland/Yamaha audio streaming interfaces have more or less
+ * standard descriptors, but older devices might lack descriptors, and
+ * future ones might change, so ensure that we fail silently if the
+ * interface doesn't look exactly right.
+ */
+
+ /* must have a non-zero altsetting for streaming */
+ if (iface->num_altsetting < 2)
+ return -ENODEV;
+ alts = &iface->altsetting[1];
+ altsd = get_iface_desc(alts);
+
+ /* must have an isochronous endpoint for streaming */
+ if (altsd->bNumEndpoints < 1)
+ return -ENODEV;
+ epd = get_endpoint(alts, 0);
+ if (!usb_endpoint_xfer_isoc(epd))
+ return -ENODEV;
+
+ /* must have format descriptors */
+ ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
+ UAC_AS_GENERAL);
+ fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
+ UAC_FORMAT_TYPE);
+ if (!ashd || ashd->bLength < 7 ||
+ !fmtd || fmtd->bLength < 8)
+ return -ENODEV;
+
+ return create_standard_audio_quirk(chip, iface, driver, NULL);
+}
+
+static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver,
+ struct usb_host_interface *alts)
+{
+ static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
+ .type = QUIRK_MIDI_YAMAHA
+ };
+ struct usb_midi_in_jack_descriptor *injd;
+ struct usb_midi_out_jack_descriptor *outjd;
+
+ /* must have some valid jack descriptors */
+ injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
+ NULL, USB_MS_MIDI_IN_JACK);
+ outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
+ NULL, USB_MS_MIDI_OUT_JACK);
+ if (!injd && !outjd)
+ return -ENODEV;
+ if (injd && (injd->bLength < 5 ||
+ (injd->bJackType != USB_MS_EMBEDDED &&
+ injd->bJackType != USB_MS_EXTERNAL)))
+ return -ENODEV;
+ if (outjd && (outjd->bLength < 6 ||
+ (outjd->bJackType != USB_MS_EMBEDDED &&
+ outjd->bJackType != USB_MS_EXTERNAL)))
+ return -ENODEV;
+ return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
+}
+
+static int create_roland_midi_quirk(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver,
+ struct usb_host_interface *alts)
+{
+ static const struct snd_usb_audio_quirk roland_midi_quirk = {
+ .type = QUIRK_MIDI_ROLAND
+ };
+ u8 *roland_desc = NULL;
+
+ /* might have a vendor-specific descriptor <06 24 F1 02 ...> */
+ for (;;) {
+ roland_desc = snd_usb_find_csint_desc(alts->extra,
+ alts->extralen,
+ roland_desc, 0xf1);
+ if (!roland_desc)
+ return -ENODEV;
+ if (roland_desc[0] < 6 || roland_desc[3] != 2)
+ continue;
+ return create_any_midi_quirk(chip, iface, driver,
+ &roland_midi_quirk);
+ }
+}
+
+static int create_std_midi_quirk(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver,
+ struct usb_host_interface *alts)
+{
+ struct usb_ms_header_descriptor *mshd;
+ struct usb_ms_endpoint_descriptor *msepd;
+
+ /* must have the MIDIStreaming interface header descriptor*/
+ mshd = (struct usb_ms_header_descriptor *)alts->extra;
+ if (alts->extralen < 7 ||
+ mshd->bLength < 7 ||
+ mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
+ mshd->bDescriptorSubtype != USB_MS_HEADER)
+ return -ENODEV;
+ /* must have the MIDIStreaming endpoint descriptor*/
+ msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
+ if (alts->endpoint[0].extralen < 4 ||
+ msepd->bLength < 4 ||
+ msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
+ msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
+ msepd->bNumEmbMIDIJack < 1 ||
+ msepd->bNumEmbMIDIJack > 16)
+ return -ENODEV;
+
+ return create_any_midi_quirk(chip, iface, driver, NULL);
+}
+
+static int create_auto_midi_quirk(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver)
+{
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ struct usb_endpoint_descriptor *epd;
+ int err;
+
+ alts = &iface->altsetting[0];
+ altsd = get_iface_desc(alts);
+
+ /* must have at least one bulk/interrupt endpoint for streaming */
+ if (altsd->bNumEndpoints < 1)
+ return -ENODEV;
+ epd = get_endpoint(alts, 0);
+ if (!usb_endpoint_xfer_bulk(epd) ||
+ !usb_endpoint_xfer_int(epd))
+ return -ENODEV;
+
+ switch (USB_ID_VENDOR(chip->usb_id)) {
+ case 0x0499: /* Yamaha */
+ err = create_yamaha_midi_quirk(chip, iface, driver, alts);
+ if (err < 0 && err != -ENODEV)
+ return err;
+ break;
+ case 0x0582: /* Roland */
+ err = create_roland_midi_quirk(chip, iface, driver, alts);
+ if (err < 0 && err != -ENODEV)
+ return err;
+ break;
+ }
+
+ return create_std_midi_quirk(chip, iface, driver, alts);
+}
+
+static int create_autodetect_quirk(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver)
+{
+ int err;
+
+ err = create_auto_pcm_quirk(chip, iface, driver);
+ if (err == -ENODEV)
+ err = create_auto_midi_quirk(chip, iface, driver);
+ return err;
+}
+
+static int create_autodetect_quirks(struct snd_usb_audio *chip,
+ struct usb_interface *iface,
+ struct usb_driver *driver,
+ const struct snd_usb_audio_quirk *quirk)
+{
+ int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
+ int ifcount, ifnum, err;
+
+ err = create_autodetect_quirk(chip, iface, driver);
+ if (err < 0)
+ return err;
+
+ /*
+ * ALSA PCM playback/capture devices cannot be registered in two steps,
+ * so we have to claim the other corresponding interface here.
+ */
+ ifcount = chip->dev->actconfig->desc.bNumInterfaces;
+ for (ifnum = 0; ifnum < ifcount; ifnum++) {
+ if (ifnum == probed_ifnum || quirk->ifnum >= 0)
+ continue;
+ iface = usb_ifnum_to_if(chip->dev, ifnum);
+ if (!iface ||
+ usb_interface_claimed(iface) ||
+ get_iface_desc(iface->altsetting)->bInterfaceClass !=
+ USB_CLASS_VENDOR_SPEC)
+ continue;
+
+ err = create_autodetect_quirk(chip, iface, driver);
+ if (err >= 0)
+ usb_driver_claim_interface(driver, iface, (void *)-1L);
+ }
+
+ return 0;
+}
+
/*
* Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
* The only way to detect the sample rate is by looking at wMaxPacketSize.
@@ -303,9 +510,11 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
static const quirk_func_t quirk_funcs[] = {
[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
[QUIRK_COMPOSITE] = create_composite_quirk,
+ [QUIRK_AUTODETECT] = create_autodetect_quirks,
[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
+ [QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 22:03:53 +0100