/*
* usbmidi.c - ALSA USB MIDI driver
*
- * Copyright (c) 2002-2005 Clemens Ladisch
+ * Copyright (c) 2002-2007 Clemens Ladisch
* All rights reserved.
*
* Based on the OSS usb-midi driver by NAGANO Daisuke,
* SUCH DAMAGE.
*/
-#include <sound/driver.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/bitops.h>
struct usb_protocol_ops* usb_protocol_ops;
struct list_head list;
struct timer_list error_timer;
+ spinlock_t disc_lock;
struct snd_usb_midi_endpoint {
struct snd_usb_midi_out_endpoint *out;
struct snd_usb_midi_in_endpoint *in;
} endpoints[MIDI_MAX_ENDPOINTS];
unsigned long input_triggered;
+ unsigned char disconnected;
};
struct snd_usb_midi_out_endpoint {
struct urb* urb;
struct usbmidi_in_port {
struct snd_rawmidi_substream *substream;
+ u8 running_status_length;
} ports[0x10];
u8 seen_f5;
u8 error_resubmit;
struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
int i;
+ spin_lock(&umidi->disc_lock);
+ if (umidi->disconnected) {
+ spin_unlock(&umidi->disc_lock);
+ return;
+ }
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
if (in && in->error_resubmit) {
if (umidi->endpoints[i].out)
snd_usbmidi_do_output(umidi->endpoints[i].out);
}
+ spin_unlock(&umidi->disc_lock);
}
/* helper function to send static data that may not DMA-able */
}
}
+/*
+ * Buggy M-Audio device: running status on input results in a packet that has
+ * the data bytes but not the status byte and that is marked with CIN 4.
+ */
+static void snd_usbmidi_maudio_broken_running_status_input(
+ struct snd_usb_midi_in_endpoint* ep,
+ uint8_t* buffer, int buffer_length)
+{
+ int i;
+
+ for (i = 0; i + 3 < buffer_length; i += 4)
+ if (buffer[i] != 0) {
+ int cable = buffer[i] >> 4;
+ u8 cin = buffer[i] & 0x0f;
+ struct usbmidi_in_port *port = &ep->ports[cable];
+ int length;
+
+ length = snd_usbmidi_cin_length[cin];
+ if (cin == 0xf && buffer[i + 1] >= 0xf8)
+ ; /* realtime msg: no running status change */
+ else if (cin >= 0x8 && cin <= 0xe)
+ /* channel msg */
+ port->running_status_length = length - 1;
+ else if (cin == 0x4 &&
+ port->running_status_length != 0 &&
+ buffer[i + 1] < 0x80)
+ /* CIN 4 that is not a SysEx */
+ length = port->running_status_length;
+ else
+ /*
+ * All other msgs cannot begin running status.
+ * (A channel msg sent as two or three CIN 0xF
+ * packets could in theory, but this device
+ * doesn't use this format.)
+ */
+ port->running_status_length = 0;
+ snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
+ }
+}
+
+/*
+ * CME protocol: like the standard protocol, but SysEx commands are sent as a
+ * single USB packet preceded by a 0x0F byte.
+ */
+static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
+ snd_usbmidi_standard_input(ep, buffer, buffer_length);
+ else
+ snd_usbmidi_input_data(ep, buffer[0] >> 4,
+ &buffer[1], buffer_length - 1);
+}
+
/*
* Adds one USB MIDI packet to the output buffer.
*/
.output_packet = snd_usbmidi_output_midiman_packet,
};
+static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
+ .input = snd_usbmidi_maudio_broken_running_status_input,
+ .output = snd_usbmidi_standard_output,
+ .output_packet = snd_usbmidi_output_standard_packet,
+};
+
+static struct usb_protocol_ops snd_usbmidi_cme_ops = {
+ .input = snd_usbmidi_cme_input,
+ .output = snd_usbmidi_standard_output,
+ .output_packet = snd_usbmidi_output_standard_packet,
+};
+
/*
* Novation USB MIDI protocol: number of data bytes is in the first byte
* (when receiving) (+1!) or in the second byte (when sending); data begins
snd_usbmidi_out_endpoint_delete(ep);
return -ENOMEM;
}
- /* we never use interrupt output pipes */
- pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
- ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
+ if (ep_info->out_interval)
+ pipe = usb_sndintpipe(umidi->chip->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 */
+ /* FIXME: we need more URBs to get reasonable bandwidth here: */
+ ep->max_transfer = 4;
+ else
+ ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
buffer = usb_buffer_alloc(umidi->chip->dev, ep->max_transfer,
GFP_KERNEL, &ep->urb->transfer_dma);
if (!buffer) {
snd_usbmidi_out_endpoint_delete(ep);
return -ENOMEM;
}
- usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
- ep->max_transfer, snd_usbmidi_out_urb_complete, ep);
+ if (ep_info->out_interval)
+ usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer,
+ ep->max_transfer, snd_usbmidi_out_urb_complete,
+ ep, ep_info->out_interval);
+ else
+ usb_fill_bulk_urb(ep->urb, umidi->chip->dev,
+ pipe, buffer, ep->max_transfer,
+ snd_usbmidi_out_urb_complete, ep);
ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
spin_lock_init(&ep->buffer_lock);
int i;
umidi = list_entry(p, struct snd_usb_midi, list);
- del_timer_sync(&umidi->error_timer);
+ /*
+ * an URB's completion handler may start the timer and
+ * a timer may submit an URB. To reliably break the cycle
+ * a flag under lock must be used
+ */
+ spin_lock_irq(&umidi->disc_lock);
+ umidi->disconnected = 1;
+ spin_unlock_irq(&umidi->disc_lock);
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
struct snd_usb_midi_endpoint* ep = &umidi->endpoints[i];
if (ep->out)
if (ep->in)
usb_kill_urb(ep->in->urb);
}
+ del_timer_sync(&umidi->error_timer);
}
static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
endpoints[epidx].out_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
endpoints[epidx].out_interval = ep->bInterval;
+ else if (snd_usb_get_speed(umidi->chip->dev) == USB_SPEED_LOW)
+ /*
+ * Low speed bulk transfers don't exist, so
+ * force interrupt transfers for devices like
+ * ESI MIDI Mate that try to use them anyway.
+ */
+ endpoints[epidx].out_interval = 1;
endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
endpoints[epidx].in_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
endpoints[epidx].in_interval = ep->bInterval;
+ else if (snd_usb_get_speed(umidi->chip->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",
ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
umidi->quirk = quirk;
umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
init_timer(&umidi->error_timer);
+ spin_lock_init(&umidi->disc_lock);
umidi->error_timer.function = snd_usbmidi_error_timer;
umidi->error_timer.data = (unsigned long)umidi;
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 */
+ umidi->usb_protocol_ops =
+ &snd_usbmidi_maudio_broken_running_status_ops;
break;
case QUIRK_MIDI_FIXED_ENDPOINT:
memcpy(&endpoints[0], quirk->data,
err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
break;
case QUIRK_MIDI_CME:
+ umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
break;
default:
git.samba.org / sfrench / cifs-2.6.git / blobdiff