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>

6 files changed, 18 insertions, 16 deletions

diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index 00cd54c236b4..0ad061e5728b 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -62,8 +62,8 @@ static int us122l_create_usbmidi(struct snd_card *card)
         struct usb_device *dev = US122L(card)->chip.dev;
         struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
 
-        return snd_usb_create_midi_interface(&US122L(card)->chip,
-                                             iface, &quirk);
+        return snd_usbmidi_create(card, iface,
+                                  &US122L(card)->midi_list, &quirk);
 }
 
 static int us144_create_usbmidi(struct snd_card *card)
@@ -84,8 +84,8 @@ static int us144_create_usbmidi(struct snd_card *card)
         struct usb_device *dev = US122L(card)->chip.dev;
         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
 
-        return snd_usb_create_midi_interface(&US122L(card)->chip,
-                                             iface, &quirk);
+        return snd_usbmidi_create(card, iface,
+                                  &US122L(card)->midi_list, &quirk);
 }
 
 /*
@@ -297,7 +297,7 @@ static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
 static void us122l_stop(struct us122l *us122l)
 {
         struct list_head *p;
-        list_for_each(p, &us122l->chip.midi_list)
+        list_for_each(p, &us122l->midi_list)
                 snd_usbmidi_input_stop(p);
 
         usb_stream_stop(&us122l->sk);
@@ -363,7 +363,7 @@ static bool us122l_start(struct us122l *us122l,
                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
                 goto out;
         }
-        list_for_each(p, &us122l->chip.midi_list)
+        list_for_each(p, &us122l->midi_list)
                 snd_usbmidi_input_start(p);
         success = true;
 out:
@@ -508,7 +508,7 @@ static bool us122l_create_card(struct snd_card *card)
         if (err < 0) {
 /* release the midi resources */
                 struct list_head *p;
-                list_for_each(p, &us122l->chip.midi_list)
+                list_for_each(p, &us122l->midi_list)
                         snd_usbmidi_disconnect(p);
 
                 us122l_stop(us122l);
@@ -546,7 +546,7 @@ static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
         US122L(card)->chip.card = card;
         mutex_init(&US122L(card)->mutex);
         init_waitqueue_head(&US122L(card)->sk.sleep);
-        INIT_LIST_HEAD(&US122L(card)->chip.midi_list);
+        INIT_LIST_HEAD(&US122L(card)->midi_list);
         strcpy(card->driver, "USB "NAME_ALLCAPS"");
         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
@@ -638,7 +638,7 @@ static void snd_us122l_disconnect(struct usb_interface *intf)
         us122l->chip.shutdown = 1;
 
 /* release the midi resources */
-        list_for_each(p, &us122l->chip.midi_list) {
+        list_for_each(p, &us122l->midi_list) {
                 snd_usbmidi_disconnect(p);
         }
 
@@ -667,7 +667,7 @@ static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
         if (!us122l)
                 return 0;
 
-        list_for_each(p, &us122l->chip.midi_list)
+        list_for_each(p, &us122l->midi_list)
                 snd_usbmidi_input_stop(p);
 
         mutex_lock(&us122l->mutex);
@@ -720,7 +720,7 @@ static int snd_us122l_resume(struct usb_interface *intf)
         if (err)
                 goto unlock;
 
-        list_for_each(p, &us122l->chip.midi_list)
+        list_for_each(p, &us122l->midi_list)
                 snd_usbmidi_input_start(p);
 unlock:
         mutex_unlock(&us122l->mutex);
diff --git a/sound/usb/usx2y/us122l.h b/sound/usb/usx2y/us122l.h
index 3d10c4b2a0f5..61ce5d7de0b9 100644
--- a/sound/usb/usx2y/us122l.h
+++ b/sound/usb/usx2y/us122l.h
@@ -12,6 +12,7 @@ struct us122l {
         unsigned                second_periods_polled;
         struct file             *master;
         struct file             *slave;
+        struct list_head        midi_list;
 
         atomic_t                mmap_count;
 };
diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
index 52e04b2f35d3..f96ab86259d0 100644
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -171,7 +171,7 @@ static int usX2Y_create_usbmidi(struct snd_card *card)
                 &quirk_2 : &quirk_1;
 
         snd_printdd("usX2Y_create_usbmidi \n");
-        return snd_usb_create_midi_interface(&usX2Y(card)->chip, iface, quirk);
+        return snd_usbmidi_create(card, iface, &usX2Y(card)->midi_list, quirk);
 }
 
 static int usX2Y_create_alsa_devices(struct snd_card *card)
diff --git a/sound/usb/usx2y/usbusx2y.c b/sound/usb/usx2y/usbusx2y.c
index cb4bb8373ca2..181337090e48 100644
--- a/sound/usb/usx2y/usbusx2y.c
+++ b/sound/usb/usx2y/usbusx2y.c
@@ -354,7 +354,7 @@ static int usX2Y_create_card(struct usb_device *device, struct snd_card **cardp)
         usX2Y(card)->chip.card = card;
         init_waitqueue_head(&usX2Y(card)->prepare_wait_queue);
         mutex_init(&usX2Y(card)->prepare_mutex);
-        INIT_LIST_HEAD(&usX2Y(card)->chip.midi_list);
+        INIT_LIST_HEAD(&usX2Y(card)->midi_list);
         strcpy(card->driver, "USB "NAME_ALLCAPS"");
         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
@@ -451,7 +451,7 @@ static void usX2Y_usb_disconnect(struct usb_device *device, void* ptr)
                 usb_kill_urb(usX2Y->In04urb);
                 snd_card_disconnect(card);
                 /* release the midi resources */
-                list_for_each(p, &usX2Y->chip.midi_list) {
+                list_for_each(p, &usX2Y->midi_list) {
                         snd_usbmidi_disconnect(p);
                 }
                 if (usX2Y->us428ctls_sharedmem) 
diff --git a/sound/usb/usx2y/usbusx2y.h b/sound/usb/usx2y/usbusx2y.h
index 456b5fdbc339..231866ea3491 100644
--- a/sound/usb/usx2y/usbusx2y.h
+++ b/sound/usb/usx2y/usbusx2y.h
@@ -42,6 +42,7 @@ struct usX2Ydev {
         struct snd_usX2Y_substream      *subs[4];
         struct snd_usX2Y_substream      * volatile  prepare_subs;
         wait_queue_head_t       prepare_wait_queue;
+        struct list_head        midi_list;
 };
 
 
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
index 9efd27f6b52f..b8e2f4691493 100644
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -740,7 +740,7 @@ static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
                 alternate = 1;
                 usX2Y->stride = 4;
         }
-        list_for_each(p, &usX2Y->chip.midi_list) {
+        list_for_each(p, &usX2Y->midi_list) {
                 snd_usbmidi_input_stop(p);
         }
         usb_kill_urb(usX2Y->In04urb);
@@ -750,7 +750,7 @@ static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
         }
         usX2Y->In04urb->dev = usX2Y->chip.dev;
         err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
-        list_for_each(p, &usX2Y->chip.midi_list) {
+        list_for_each(p, &usX2Y->midi_list) {
                 snd_usbmidi_input_start(p);
         }
         usX2Y->format = format;