sound: usb: make the USB MIDI module more independent

Remove the dependecy from the USB MIDI code on the snd_usb_audio
structure.  This allows using the USB MIDI module from another driver
without having to pretend to be the generic USB audio driver.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 23 insertions, 15 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 8db0374e10d..b074a594c59 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2893,7 +2893,9 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
                 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
                      altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
                     altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
-                        if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
+                        int err = snd_usbmidi_create(chip->card, iface,
+                                                     &chip->midi_list, NULL);
+                        if (err < 0) {
                                 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
                                 continue;
                         }
@@ -3038,12 +3040,11 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip,
                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
                         .data = &uaxx_ep
                 };
-                if (chip->usb_id == USB_ID(0x0582, 0x002b))
-                        return snd_usb_create_midi_interface(chip, iface,
-                                                             &ua700_quirk);
-                else
-                        return snd_usb_create_midi_interface(chip, iface,
-                                                             &uaxx_quirk);
+                const struct snd_usb_audio_quirk *quirk =
+                        chip->usb_id == USB_ID(0x0582, 0x002b)
+                        ? &ua700_quirk : &uaxx_quirk;
+                return snd_usbmidi_create(chip->card, iface,
+                                          &chip->midi_list, quirk);
         }
 
         if (altsd->bNumEndpoints != 1)
@@ -3370,6 +3371,13 @@ static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
         return 0; /* keep this altsetting */
 }
 
+static int create_any_midi_quirk(struct snd_usb_audio *chip,
+                                 struct usb_interface *intf,
+                                 const struct snd_usb_audio_quirk *quirk)
+{
+        return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
+}
+
 /*
  * audio-interface quirks
  *
@@ -3387,14 +3395,14 @@ static 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_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_FASTLANE] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
-                [QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
+                [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_MIDIMAN] = create_any_midi_quirk,
+                [QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
+                [QUIRK_MIDI_FASTLANE] = create_any_midi_quirk,
+                [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
+                [QUIRK_MIDI_CME] = create_any_midi_quirk,
                 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
                 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
                 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,