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>
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 80b2845..6e89b83 100644
--- a/sound/usb/usbmidi.c
+++ b/sound/usb/usbmidi.c
@@ -102,7 +102,8 @@
};
struct snd_usb_midi {
- struct snd_usb_audio *chip;
+ struct usb_device *dev;
+ struct snd_card *card;
struct usb_interface *iface;
const struct snd_usb_audio_quirk *quirk;
struct snd_rawmidi *rmidi;
@@ -111,6 +112,8 @@
struct timer_list error_timer;
spinlock_t disc_lock;
struct mutex mutex;
+ u32 usb_id;
+ int next_midi_device;
struct snd_usb_midi_endpoint {
struct snd_usb_midi_out_endpoint *out;
@@ -260,7 +263,7 @@
}
}
- urb->dev = ep->umidi->chip->dev;
+ urb->dev = ep->umidi->dev;
snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
}
@@ -301,7 +304,7 @@
unsigned long flags;
spin_lock_irqsave(&ep->buffer_lock, flags);
- if (ep->umidi->chip->shutdown) {
+ if (ep->umidi->disconnected) {
spin_unlock_irqrestore(&ep->buffer_lock, flags);
return;
}
@@ -317,7 +320,7 @@
dump_urb("sending", urb->transfer_buffer,
urb->transfer_buffer_length);
- urb->dev = ep->umidi->chip->dev;
+ urb->dev = ep->umidi->dev;
if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
break;
ep->active_urbs |= 1 << urb_index;
@@ -354,7 +357,7 @@
if (in && in->error_resubmit) {
in->error_resubmit = 0;
for (j = 0; j < INPUT_URBS; ++j) {
- in->urbs[j]->dev = umidi->chip->dev;
+ in->urbs[j]->dev = umidi->dev;
snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
}
}
@@ -374,7 +377,7 @@
return -ENOMEM;
dump_urb("sending", buf, len);
if (ep->urbs[0].urb)
- err = usb_bulk_msg(ep->umidi->chip->dev, ep->urbs[0].urb->pipe,
+ err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
buf, len, NULL, 250);
kfree(buf);
return err;
@@ -729,8 +732,7 @@
if (!ep->ports[0].active)
return;
- count = snd_usb_get_speed(ep->umidi->chip->dev) == USB_SPEED_HIGH
- ? 1 : 2;
+ count = snd_usb_get_speed(ep->umidi->dev) == USB_SPEED_HIGH ? 1 : 2;
count = snd_rawmidi_transmit(ep->ports[0].substream,
urb->transfer_buffer,
count);
@@ -898,7 +900,7 @@
hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
intfd = get_iface_desc(hostif);
snd_usbmidi_input_stop(&umidi->list);
- usb_set_interface(umidi->chip->dev, intfd->bInterfaceNumber,
+ usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
intfd->bAlternateSetting);
snd_usbmidi_input_start(&umidi->list);
}
@@ -913,7 +915,7 @@
if (umidi->opened++ == 0 && umidi->roland_load_ctl) {
ctl = umidi->roland_load_ctl;
ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
- snd_ctl_notify(umidi->chip->card,
+ snd_ctl_notify(umidi->card,
SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
update_roland_altsetting(umidi);
}
@@ -921,7 +923,7 @@
if (--umidi->opened == 0 && umidi->roland_load_ctl) {
ctl = umidi->roland_load_ctl;
ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
- snd_ctl_notify(umidi->chip->card,
+ snd_ctl_notify(umidi->card,
SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
}
}
@@ -963,7 +965,7 @@
port->active = up;
if (up) {
- if (port->ep->umidi->chip->shutdown) {
+ if (port->ep->umidi->disconnected) {
/* gobble up remaining bytes to prevent wait in
* snd_rawmidi_drain_output */
while (!snd_rawmidi_transmit_empty(substream))
@@ -1041,7 +1043,7 @@
static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
unsigned int buffer_length)
{
- usb_buffer_free(umidi->chip->dev, buffer_length,
+ usb_buffer_free(umidi->dev, buffer_length,
urb->transfer_buffer, urb->transfer_dma);
usb_free_urb(urb);
}
@@ -1088,24 +1090,24 @@
}
}
if (ep_info->in_interval)
- pipe = usb_rcvintpipe(umidi->chip->dev, ep_info->in_ep);
+ pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
else
- pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep);
- length = usb_maxpacket(umidi->chip->dev, pipe, 0);
+ pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
+ length = usb_maxpacket(umidi->dev, pipe, 0);
for (i = 0; i < INPUT_URBS; ++i) {
- buffer = usb_buffer_alloc(umidi->chip->dev, length, GFP_KERNEL,
+ buffer = usb_buffer_alloc(umidi->dev, length, GFP_KERNEL,
&ep->urbs[i]->transfer_dma);
if (!buffer) {
snd_usbmidi_in_endpoint_delete(ep);
return -ENOMEM;
}
if (ep_info->in_interval)
- usb_fill_int_urb(ep->urbs[i], umidi->chip->dev,
+ usb_fill_int_urb(ep->urbs[i], umidi->dev,
pipe, buffer, length,
snd_usbmidi_in_urb_complete,
ep, ep_info->in_interval);
else
- usb_fill_bulk_urb(ep->urbs[i], umidi->chip->dev,
+ usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
pipe, buffer, length,
snd_usbmidi_in_urb_complete, ep);
ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
@@ -1157,15 +1159,15 @@
ep->urbs[i].ep = ep;
}
if (ep_info->out_interval)
- pipe = usb_sndintpipe(umidi->chip->dev, ep_info->out_ep);
+ pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
else
- pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
- if (umidi->chip->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */
+ pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
+ if (umidi->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */
ep->max_transfer = 4;
else
- ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
+ ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
for (i = 0; i < OUTPUT_URBS; ++i) {
- buffer = usb_buffer_alloc(umidi->chip->dev,
+ buffer = usb_buffer_alloc(umidi->dev,
ep->max_transfer, GFP_KERNEL,
&ep->urbs[i].urb->transfer_dma);
if (!buffer) {
@@ -1173,12 +1175,12 @@
return -ENOMEM;
}
if (ep_info->out_interval)
- usb_fill_int_urb(ep->urbs[i].urb, umidi->chip->dev,
+ usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
pipe, buffer, ep->max_transfer,
snd_usbmidi_out_urb_complete,
&ep->urbs[i], ep_info->out_interval);
else
- usb_fill_bulk_urb(ep->urbs[i].urb, umidi->chip->dev,
+ usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
pipe, buffer, ep->max_transfer,
snd_usbmidi_out_urb_complete,
&ep->urbs[i]);
@@ -1412,7 +1414,7 @@
int i;
for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
- if (snd_usbmidi_port_info[i].id == umidi->chip->usb_id &&
+ if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
snd_usbmidi_port_info[i].port == number)
return &snd_usbmidi_port_info[i];
}
@@ -1450,7 +1452,7 @@
port_info = find_port_info(umidi, number);
name_format = port_info ? port_info->name : "%s MIDI %d";
snprintf(substream->name, sizeof(substream->name),
- name_format, umidi->chip->card->shortname, number + 1);
+ name_format, umidi->card->shortname, number + 1);
*rsubstream = substream;
}
@@ -1548,7 +1550,7 @@
endpoints[epidx].out_ep = usb_endpoint_num(ep);
if (usb_endpoint_xfer_int(ep))
endpoints[epidx].out_interval = ep->bInterval;
- else if (snd_usb_get_speed(umidi->chip->dev) == USB_SPEED_LOW)
+ else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
/*
* Low speed bulk transfers don't exist, so
* force interrupt transfers for devices like
@@ -1568,7 +1570,7 @@
endpoints[epidx].in_ep = usb_endpoint_num(ep);
if (usb_endpoint_xfer_int(ep))
endpoints[epidx].in_interval = ep->bInterval;
- else if (snd_usb_get_speed(umidi->chip->dev) == USB_SPEED_LOW)
+ else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
endpoints[epidx].in_interval = 1;
endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
@@ -1647,11 +1649,11 @@
snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
intfd->bAlternateSetting);
- usb_set_interface(umidi->chip->dev, intfd->bInterfaceNumber,
+ usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
intfd->bAlternateSetting);
umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
- if (snd_ctl_add(umidi->chip->card, umidi->roland_load_ctl) < 0)
+ if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
umidi->roland_load_ctl = NULL;
}
@@ -1668,7 +1670,7 @@
struct usb_endpoint_descriptor* epd;
int i, out_eps = 0, in_eps = 0;
- if (USB_ID_VENDOR(umidi->chip->usb_id) == 0x0582)
+ if (USB_ID_VENDOR(umidi->usb_id) == 0x0582)
snd_usbmidi_switch_roland_altsetting(umidi);
if (endpoint[0].out_ep || endpoint[0].in_ep)
@@ -1855,12 +1857,12 @@
struct snd_rawmidi *rmidi;
int err;
- err = snd_rawmidi_new(umidi->chip->card, "USB MIDI",
- umidi->chip->next_midi_device++,
+ err = snd_rawmidi_new(umidi->card, "USB MIDI",
+ umidi->next_midi_device++,
out_ports, in_ports, &rmidi);
if (err < 0)
return err;
- strcpy(rmidi->name, umidi->chip->card->shortname);
+ strcpy(rmidi->name, umidi->card->shortname);
rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
@@ -1899,7 +1901,7 @@
return;
for (i = 0; i < INPUT_URBS; ++i) {
struct urb* urb = ep->urbs[i];
- urb->dev = ep->umidi->chip->dev;
+ urb->dev = ep->umidi->dev;
snd_usbmidi_submit_urb(urb, GFP_KERNEL);
}
}
@@ -1920,9 +1922,10 @@
/*
* Creates and registers everything needed for a MIDI streaming interface.
*/
-int snd_usb_create_midi_interface(struct snd_usb_audio* chip,
- struct usb_interface* iface,
- const struct snd_usb_audio_quirk* quirk)
+int snd_usbmidi_create(struct snd_card *card,
+ struct usb_interface* iface,
+ struct list_head *midi_list,
+ const struct snd_usb_audio_quirk* quirk)
{
struct snd_usb_midi* umidi;
struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
@@ -1932,13 +1935,16 @@
umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
if (!umidi)
return -ENOMEM;
- umidi->chip = chip;
+ umidi->dev = interface_to_usbdev(iface);
+ umidi->card = card;
umidi->iface = iface;
umidi->quirk = quirk;
umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
init_timer(&umidi->error_timer);
spin_lock_init(&umidi->disc_lock);
mutex_init(&umidi->mutex);
+ umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
+ le16_to_cpu(umidi->dev->descriptor.idProduct));
umidi->error_timer.function = snd_usbmidi_error_timer;
umidi->error_timer.data = (unsigned long)umidi;
@@ -1947,7 +1953,7 @@
switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
case QUIRK_MIDI_STANDARD_INTERFACE:
err = snd_usbmidi_get_ms_info(umidi, endpoints);
- if (chip->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
+ if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
umidi->usb_protocol_ops =
&snd_usbmidi_maudio_broken_running_status_ops;
break;
@@ -1983,7 +1989,7 @@
* interface 0, so we have to make sure that the USB core looks
* again at interface 0 by calling usb_set_interface() on it.
*/
- usb_set_interface(umidi->chip->dev, 0, 0);
+ usb_set_interface(umidi->dev, 0, 0);
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
break;
case QUIRK_MIDI_EMAGIC:
@@ -2029,14 +2035,14 @@
return err;
}
- list_add(&umidi->list, &umidi->chip->midi_list);
+ list_add_tail(&umidi->list, midi_list);
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
return 0;
}
-EXPORT_SYMBOL(snd_usb_create_midi_interface);
+EXPORT_SYMBOL(snd_usbmidi_create);
EXPORT_SYMBOL(snd_usbmidi_input_stop);
EXPORT_SYMBOL(snd_usbmidi_input_start);
EXPORT_SYMBOL(snd_usbmidi_disconnect);