[alsa-devel] [PATCH 1/3] snd-bcd2000: move MIDI part into own files
Mario Kicherer
dev at kicherer.org
Sat Jan 31 22:34:23 CET 2015
Signed-off-by: Mario Kicherer <dev at kicherer.org>
---
sound/usb/bcd2000/Makefile | 2 +-
sound/usb/bcd2000/bcd2000.c | 353 +++-----------------------------------------
sound/usb/bcd2000/bcd2000.h | 25 ++++
sound/usb/bcd2000/midi.c | 324 ++++++++++++++++++++++++++++++++++++++++
sound/usb/bcd2000/midi.h | 31 ++++
5 files changed, 404 insertions(+), 331 deletions(-)
create mode 100644 sound/usb/bcd2000/bcd2000.h
create mode 100644 sound/usb/bcd2000/midi.c
create mode 100644 sound/usb/bcd2000/midi.h
diff --git a/sound/usb/bcd2000/Makefile b/sound/usb/bcd2000/Makefile
index f09ccc0..bc64a21 100644
--- a/sound/usb/bcd2000/Makefile
+++ b/sound/usb/bcd2000/Makefile
@@ -1,3 +1,3 @@
-snd-bcd2000-y := bcd2000.o
+snd-bcd2000-y := bcd2000.o midi.o
obj-$(CONFIG_SND_BCD2000) += snd-bcd2000.o
\ No newline at end of file
diff --git a/sound/usb/bcd2000/bcd2000.c b/sound/usb/bcd2000/bcd2000.c
index 820d6ca..0f22bd9 100644
--- a/sound/usb/bcd2000/bcd2000.c
+++ b/sound/usb/bcd2000/bcd2000.c
@@ -20,52 +20,15 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/bitmap.h>
-#include <linux/usb.h>
-#include <linux/usb/audio.h>
-#include <sound/core.h>
-#include <sound/initval.h>
-#include <sound/rawmidi.h>
-#define PREFIX "snd-bcd2000: "
-#define BUFSIZE 64
+#include "bcd2000.h"
+#include "midi.h"
static struct usb_device_id id_table[] = {
{ USB_DEVICE(0x1397, 0x00bd) },
{ },
};
-static unsigned char device_cmd_prefix[] = {0x03, 0x00};
-
-static unsigned char bcd2000_init_sequence[] = {
- 0x07, 0x00, 0x00, 0x00, 0x78, 0x48, 0x1c, 0x81,
- 0xc4, 0x00, 0x00, 0x00, 0x5e, 0x53, 0x4a, 0xf7,
- 0x18, 0xfa, 0x11, 0xff, 0x6c, 0xf3, 0x90, 0xff,
- 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
- 0x18, 0xfa, 0x11, 0xff, 0x14, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0xf2, 0x34, 0x4a, 0xf7,
- 0x18, 0xfa, 0x11, 0xff
-};
-
-struct bcd2000 {
- struct usb_device *dev;
- struct snd_card *card;
- struct usb_interface *intf;
- int card_index;
-
- int midi_out_active;
- struct snd_rawmidi *rmidi;
- struct snd_rawmidi_substream *midi_receive_substream;
- struct snd_rawmidi_substream *midi_out_substream;
-
- unsigned char midi_in_buf[BUFSIZE];
- unsigned char midi_out_buf[BUFSIZE];
-
- struct urb *midi_out_urb;
- struct urb *midi_in_urb;
-
- struct usb_anchor anchor;
-};
-
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
@@ -74,291 +37,40 @@ DECLARE_BITMAP(devices_used, SNDRV_CARDS);
static struct usb_driver bcd2000_driver;
#ifdef CONFIG_SND_DEBUG
-static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len)
+void bcd2000_dump_buffer(const char *prefix, const char *buf, int len)
{
print_hex_dump(KERN_DEBUG, prefix,
DUMP_PREFIX_NONE, 16, 1,
buf, len, false);
}
#else
-static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) {}
+void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) {}
#endif
-static int bcd2000_midi_input_open(struct snd_rawmidi_substream *substream)
-{
- return 0;
-}
-
-static int bcd2000_midi_input_close(struct snd_rawmidi_substream *substream)
-{
- return 0;
-}
-
-/* (de)register midi substream from client */
-static void bcd2000_midi_input_trigger(struct snd_rawmidi_substream *substream,
- int up)
-{
- struct bcd2000 *bcd2k = substream->rmidi->private_data;
- bcd2k->midi_receive_substream = up ? substream : NULL;
-}
-
-static void bcd2000_midi_handle_input(struct bcd2000 *bcd2k,
- const unsigned char *buf, unsigned int buf_len)
-{
- unsigned int payload_length, tocopy;
- struct snd_rawmidi_substream *midi_receive_substream;
-
- midi_receive_substream = ACCESS_ONCE(bcd2k->midi_receive_substream);
- if (!midi_receive_substream)
- return;
-
- bcd2000_dump_buffer(PREFIX "received from device: ", buf, buf_len);
-
- if (buf_len < 2)
- return;
-
- payload_length = buf[0];
-
- /* ignore packets without payload */
- if (payload_length == 0)
- return;
-
- tocopy = min(payload_length, buf_len-1);
-
- bcd2000_dump_buffer(PREFIX "sending to userspace: ",
- &buf[1], tocopy);
-
- snd_rawmidi_receive(midi_receive_substream,
- &buf[1], tocopy);
-}
-
-static void bcd2000_midi_send(struct bcd2000 *bcd2k)
-{
- int len, ret;
- struct snd_rawmidi_substream *midi_out_substream;
-
- BUILD_BUG_ON(sizeof(device_cmd_prefix) >= BUFSIZE);
-
- midi_out_substream = ACCESS_ONCE(bcd2k->midi_out_substream);
- if (!midi_out_substream)
- return;
-
- /* copy command prefix bytes */
- memcpy(bcd2k->midi_out_buf, device_cmd_prefix,
- sizeof(device_cmd_prefix));
-
- /*
- * get MIDI packet and leave space for command prefix
- * and payload length
- */
- len = snd_rawmidi_transmit(midi_out_substream,
- bcd2k->midi_out_buf + 3, BUFSIZE - 3);
-
- if (len < 0)
- dev_err(&bcd2k->dev->dev, "%s: snd_rawmidi_transmit error %d\n",
- __func__, len);
-
- if (len <= 0)
- return;
-
- /* set payload length */
- bcd2k->midi_out_buf[2] = len;
- bcd2k->midi_out_urb->transfer_buffer_length = BUFSIZE;
-
- bcd2000_dump_buffer(PREFIX "sending to device: ",
- bcd2k->midi_out_buf, len+3);
-
- /* send packet to the BCD2000 */
- ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_ATOMIC);
- if (ret < 0)
- dev_err(&bcd2k->dev->dev, PREFIX
- "%s (%p): usb_submit_urb() failed, ret=%d, len=%d\n",
- __func__, midi_out_substream, ret, len);
- else
- bcd2k->midi_out_active = 1;
-}
-
-static int bcd2000_midi_output_open(struct snd_rawmidi_substream *substream)
-{
- return 0;
-}
-
-static int bcd2000_midi_output_close(struct snd_rawmidi_substream *substream)
-{
- struct bcd2000 *bcd2k = substream->rmidi->private_data;
-
- if (bcd2k->midi_out_active) {
- usb_kill_urb(bcd2k->midi_out_urb);
- bcd2k->midi_out_active = 0;
- }
-
- return 0;
-}
-
-/* (de)register midi substream from client */
-static void bcd2000_midi_output_trigger(struct snd_rawmidi_substream *substream,
- int up)
-{
- struct bcd2000 *bcd2k = substream->rmidi->private_data;
-
- if (up) {
- bcd2k->midi_out_substream = substream;
- /* check if there is data userspace wants to send */
- if (!bcd2k->midi_out_active)
- bcd2000_midi_send(bcd2k);
- } else {
- bcd2k->midi_out_substream = NULL;
- }
-}
-
-static void bcd2000_output_complete(struct urb *urb)
-{
- struct bcd2000 *bcd2k = urb->context;
-
- bcd2k->midi_out_active = 0;
-
- if (urb->status)
- dev_warn(&urb->dev->dev,
- PREFIX "output urb->status: %d\n", urb->status);
-
- if (urb->status == -ESHUTDOWN)
- return;
-
- /* check if there is more data userspace wants to send */
- bcd2000_midi_send(bcd2k);
-}
-
-static void bcd2000_input_complete(struct urb *urb)
+static void bcd2000_disconnect(struct usb_interface *interface)
{
- int ret;
- struct bcd2000 *bcd2k = urb->context;
-
- if (urb->status)
- dev_warn(&urb->dev->dev,
- PREFIX "input urb->status: %i\n", urb->status);
+ struct bcd2000 *bcd2k = usb_get_intfdata(interface);
- if (!bcd2k || urb->status == -ESHUTDOWN)
+ if (!bcd2k)
return;
- if (urb->actual_length > 0)
- bcd2000_midi_handle_input(bcd2k, urb->transfer_buffer,
- urb->actual_length);
-
- /* return URB to device */
- ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_ATOMIC);
- if (ret < 0)
- dev_err(&bcd2k->dev->dev, PREFIX
- "%s: usb_submit_urb() failed, ret=%d\n",
- __func__, ret);
-}
-
-static struct snd_rawmidi_ops bcd2000_midi_output = {
- .open = bcd2000_midi_output_open,
- .close = bcd2000_midi_output_close,
- .trigger = bcd2000_midi_output_trigger,
-};
-
-static struct snd_rawmidi_ops bcd2000_midi_input = {
- .open = bcd2000_midi_input_open,
- .close = bcd2000_midi_input_close,
- .trigger = bcd2000_midi_input_trigger,
-};
-
-static void bcd2000_init_device(struct bcd2000 *bcd2k)
-{
- int ret;
-
- init_usb_anchor(&bcd2k->anchor);
- usb_anchor_urb(bcd2k->midi_out_urb, &bcd2k->anchor);
- usb_anchor_urb(bcd2k->midi_in_urb, &bcd2k->anchor);
-
- /* copy init sequence into buffer */
- memcpy(bcd2k->midi_out_buf, bcd2000_init_sequence, 52);
- bcd2k->midi_out_urb->transfer_buffer_length = 52;
-
- /* submit sequence */
- ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_KERNEL);
- if (ret < 0)
- dev_err(&bcd2k->dev->dev, PREFIX
- "%s: usb_submit_urb() out failed, ret=%d: ",
- __func__, ret);
- else
- bcd2k->midi_out_active = 1;
-
- /* pass URB to device to enable button and controller events */
- ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_KERNEL);
- if (ret < 0)
- dev_err(&bcd2k->dev->dev, PREFIX
- "%s: usb_submit_urb() in failed, ret=%d: ",
- __func__, ret);
-
- /* ensure initialization is finished */
- usb_wait_anchor_empty_timeout(&bcd2k->anchor, 1000);
-}
-
-static int bcd2000_init_midi(struct bcd2000 *bcd2k)
-{
- int ret;
- struct snd_rawmidi *rmidi;
-
- ret = snd_rawmidi_new(bcd2k->card, bcd2k->card->shortname, 0,
- 1, /* output */
- 1, /* input */
- &rmidi);
-
- if (ret < 0)
- return ret;
-
- strlcpy(rmidi->name, bcd2k->card->shortname, sizeof(rmidi->name));
-
- rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
- rmidi->private_data = bcd2k;
-
- rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
- snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
- &bcd2000_midi_output);
-
- rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
- snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
- &bcd2000_midi_input);
-
- bcd2k->rmidi = rmidi;
-
- bcd2k->midi_in_urb = usb_alloc_urb(0, GFP_KERNEL);
- bcd2k->midi_out_urb = usb_alloc_urb(0, GFP_KERNEL);
-
- if (!bcd2k->midi_in_urb || !bcd2k->midi_out_urb) {
- dev_err(&bcd2k->dev->dev, PREFIX "usb_alloc_urb failed\n");
- return -ENOMEM;
- }
-
- usb_fill_int_urb(bcd2k->midi_in_urb, bcd2k->dev,
- usb_rcvintpipe(bcd2k->dev, 0x81),
- bcd2k->midi_in_buf, BUFSIZE,
- bcd2000_input_complete, bcd2k, 1);
-
- usb_fill_int_urb(bcd2k->midi_out_urb, bcd2k->dev,
- usb_sndintpipe(bcd2k->dev, 0x1),
- bcd2k->midi_out_buf, BUFSIZE,
- bcd2000_output_complete, bcd2k, 1);
-
- bcd2000_init_device(bcd2k);
-
- return 0;
-}
+ mutex_lock(&devices_mutex);
-static void bcd2000_free_usb_related_resources(struct bcd2000 *bcd2k,
- struct usb_interface *interface)
-{
- /* usb_kill_urb not necessary, urb is aborted automatically */
+ /* make sure that userspace cannot create new requests */
+ snd_card_disconnect(bcd2k->card);
- usb_free_urb(bcd2k->midi_out_urb);
- usb_free_urb(bcd2k->midi_in_urb);
+ bcd2000_free_midi(bcd2k);
if (bcd2k->intf) {
usb_set_intfdata(bcd2k->intf, NULL);
bcd2k->intf = NULL;
}
+
+ clear_bit(bcd2k->card_index, devices_used);
+
+ snd_card_free_when_closed(bcd2k->card);
+
+ mutex_unlock(&devices_mutex);
}
static int bcd2000_probe(struct usb_interface *interface,
@@ -383,6 +95,7 @@ static int bcd2000_probe(struct usb_interface *interface,
err = snd_card_new(&interface->dev, index[card_index], id[card_index],
THIS_MODULE, sizeof(*bcd2k), &card);
+
if (err < 0) {
mutex_unlock(&devices_mutex);
return err;
@@ -397,10 +110,10 @@ static int bcd2000_probe(struct usb_interface *interface,
snd_card_set_dev(card, &interface->dev);
strncpy(card->driver, "snd-bcd2000", sizeof(card->driver));
- strncpy(card->shortname, "BCD2000", sizeof(card->shortname));
+ strncpy(card->shortname, DEVICENAME, sizeof(card->shortname));
usb_make_path(bcd2k->dev, usb_path, sizeof(usb_path));
snprintf(bcd2k->card->longname, sizeof(bcd2k->card->longname),
- "Behringer BCD2000 at %s",
+ "Behringer " DEVICENAME " at %s",
usb_path);
err = bcd2000_init_midi(bcd2k);
@@ -419,31 +132,11 @@ static int bcd2000_probe(struct usb_interface *interface,
probe_error:
dev_info(&bcd2k->dev->dev, PREFIX "error during probing");
- bcd2000_free_usb_related_resources(bcd2k, interface);
- snd_card_free(card);
- mutex_unlock(&devices_mutex);
- return err;
-}
-
-static void bcd2000_disconnect(struct usb_interface *interface)
-{
- struct bcd2000 *bcd2k = usb_get_intfdata(interface);
-
- if (!bcd2k)
- return;
-
- mutex_lock(&devices_mutex);
-
- /* make sure that userspace cannot create new requests */
- snd_card_disconnect(bcd2k->card);
-
- bcd2000_free_usb_related_resources(bcd2k, interface);
-
- clear_bit(bcd2k->card_index, devices_used);
-
- snd_card_free_when_closed(bcd2k->card);
+ bcd2000_disconnect(interface);
mutex_unlock(&devices_mutex);
+
+ return err;
}
static struct usb_driver bcd2000_driver = {
diff --git a/sound/usb/bcd2000/bcd2000.h b/sound/usb/bcd2000/bcd2000.h
new file mode 100644
index 0000000..a0e27c9
--- /dev/null
+++ b/sound/usb/bcd2000/bcd2000.h
@@ -0,0 +1,25 @@
+#ifndef BCD2000_H
+#define BCD2000_H
+
+#include <linux/usb.h>
+#include <linux/usb/audio.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+
+#define DEVICENAME "BCD2000"
+#define PREFIX "snd-bcd2000: "
+
+#include "midi.h"
+
+struct bcd2000 {
+ struct usb_device *dev;
+ struct snd_card *card;
+ struct usb_interface *intf;
+ int card_index;
+
+ struct bcd2000_midi midi;
+};
+
+void bcd2000_dump_buffer(const char *prefix, const char *buf, int len);
+
+#endif
diff --git a/sound/usb/bcd2000/midi.c b/sound/usb/bcd2000/midi.c
new file mode 100644
index 0000000..3f34e95
--- /dev/null
+++ b/sound/usb/bcd2000/midi.c
@@ -0,0 +1,324 @@
+/*
+ * Behringer BCD2000 driver
+ *
+ * Copyright (C) 2014 Mario Kicherer (dev at kicherer.org)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include "bcd2000.h"
+#include "midi.h"
+
+/*
+ * For details regarding the usable MIDI commands, please see the official
+ * manual: http://www.behringer.com/EN/Products/BCD2000.aspx#softwareContent
+ */
+
+/*
+ * Some bytes of the init sequence are always the same, some only vary by a
+ * small amount and some values look random.
+ *
+ * After sending the init sequence, the device also returns data via the
+ * INTERRUPT IN endpoint which we simply ignore currently as its purpose is
+ * unknown.
+ */
+static unsigned char bcd2000_init_sequence[] = {
+ 0x07, 0x00, 0x00, 0x00, /* always the same */
+ 0x78, 0x48, 0x1c, 0x81, /* random, last byte is either 0x81 or 0xff */
+ 0xc4, 0x00, 0x00, 0x00, /* always the same */
+
+ /* group A: */
+ 0x5e, /* always the same */
+ 0x53, /* observed 0x23, 0x43, 0x53, 0x83, 0xd3 */
+ 0x4a, /* looks random */
+ 0xf7, /* varies within a value of +- 4 */
+
+ 0x18, 0xfa, 0x11, 0xff, /* Group B (repeats two times) */
+ 0x6c, 0xf3, 0x90, 0xff, /* repeating values, last byte is always 0xff */
+ 0x00, 0x00, 0x00, 0x00, /* always the same */
+ 0x01, 0x00, 0x00, 0x00, /* always the same */
+
+ 0x18, 0xfa, 0x11, 0xff, /* Group B again */
+ 0x14, 0x00, 0x00, 0x00, /* always the same */
+ 0x00, 0x00, 0x00, 0x00, /* always the same */
+ 0xf2, 0x34, 0x4a, 0xf7, /* similar to group A */
+
+ 0x18, 0xfa, 0x11, 0xff /* Group B again */
+};
+
+static unsigned char device_cmd_prefix[] = MIDI_CMD_PREFIX_INIT;
+
+static int bcd2000_midi_input_open(struct snd_rawmidi_substream *substream)
+{
+ return 0;
+}
+
+static int bcd2000_midi_input_close(struct snd_rawmidi_substream *substream)
+{
+ return 0;
+}
+
+/* (de)register midi substream from client */
+static void bcd2000_midi_input_trigger(struct snd_rawmidi_substream *substream,
+ int up)
+{
+ struct bcd2000 *bcd2k = substream->rmidi->private_data;
+
+ bcd2k->midi.receive_substream = up ? substream : NULL;
+}
+
+static void bcd2000_midi_handle_input(struct bcd2000 *bcd2k,
+ const unsigned char *buf, unsigned int buf_len)
+{
+ unsigned int payload_length, tocopy;
+ struct snd_rawmidi_substream *receive_substream;
+
+ receive_substream = ACCESS_ONCE(bcd2k->midi.receive_substream);
+ if (!receive_substream)
+ return;
+
+ bcd2000_dump_buffer(PREFIX "received from device: ", buf, buf_len);
+
+ if (buf_len < 2)
+ return;
+
+ payload_length = buf[0];
+
+ /* ignore packets without payload */
+ if (payload_length == 0)
+ return;
+
+ tocopy = min(payload_length, buf_len-1);
+
+ bcd2000_dump_buffer(PREFIX "sending to userspace: ",
+ &buf[1], tocopy);
+
+ snd_rawmidi_receive(receive_substream,
+ &buf[1], tocopy);
+}
+
+static void bcd2000_midi_send(struct bcd2000 *bcd2k)
+{
+ int len, ret;
+ struct snd_rawmidi_substream *send_substream;
+
+ BUILD_BUG_ON(sizeof(device_cmd_prefix) >= MIDI_URB_BUFSIZE);
+
+ send_substream = ACCESS_ONCE(bcd2k->midi.send_substream);
+ if (!send_substream)
+ return;
+
+ /* copy command prefix bytes */
+ memcpy(bcd2k->midi.out_buffer, device_cmd_prefix,
+ sizeof(device_cmd_prefix));
+
+ /*
+ * get MIDI packet and leave space for command prefix
+ * and payload length
+ */
+ len = snd_rawmidi_transmit(send_substream,
+ bcd2k->midi.out_buffer + 3,
+ MIDI_URB_BUFSIZE - 3);
+
+ if (len < 0)
+ dev_err(&bcd2k->dev->dev, "%s: snd_rawmidi_transmit error %d\n",
+ __func__, len);
+
+ if (len <= 0)
+ return;
+
+ /* set payload length */
+ bcd2k->midi.out_buffer[2] = len;
+ bcd2k->midi.out_urb->transfer_buffer_length = MIDI_URB_BUFSIZE;
+
+ bcd2000_dump_buffer(PREFIX "sending to device: ",
+ bcd2k->midi.out_buffer, len+3);
+
+ /* send packet to the BCD2000 */
+ ret = usb_submit_urb(bcd2k->midi.out_urb, GFP_ATOMIC);
+ if (ret < 0)
+ dev_err(&bcd2k->dev->dev, PREFIX
+ "%s (%p): usb_submit_urb() failed, ret=%d, len=%d\n",
+ __func__, send_substream, ret, len);
+ else
+ bcd2k->midi.out_active = 1;
+}
+
+static int bcd2000_midi_output_open(struct snd_rawmidi_substream *substream)
+{
+ return 0;
+}
+
+static int bcd2000_midi_output_close(struct snd_rawmidi_substream *substream)
+{
+ struct bcd2000 *bcd2k = substream->rmidi->private_data;
+
+ if (bcd2k->midi.out_active) {
+ usb_kill_urb(bcd2k->midi.out_urb);
+ bcd2k->midi.out_active = 0;
+ }
+
+ return 0;
+}
+
+/* (de)register midi substream from client */
+static void bcd2000_midi_output_trigger(struct snd_rawmidi_substream *substream,
+ int up)
+{
+ struct bcd2000 *bcd2k = substream->rmidi->private_data;
+
+ if (up) {
+ bcd2k->midi.send_substream = substream;
+ /* check if there is data userspace wants to send */
+ if (!bcd2k->midi.out_active)
+ bcd2000_midi_send(bcd2k);
+ } else {
+ bcd2k->midi.send_substream = NULL;
+ }
+}
+
+static void bcd2000_output_complete(struct urb *urb)
+{
+ struct bcd2000 *bcd2k = urb->context;
+
+ bcd2k->midi.out_active = 0;
+
+ if (urb->status)
+ dev_warn(&urb->dev->dev,
+ PREFIX "output urb->status: %d\n", urb->status);
+
+ if (urb->status == -ESHUTDOWN)
+ return;
+
+ /* check if there is more data userspace wants to send */
+ bcd2000_midi_send(bcd2k);
+}
+
+static void bcd2000_input_complete(struct urb *urb)
+{
+ int ret;
+ struct bcd2000 *bcd2k = urb->context;
+
+ if (urb->status)
+ dev_warn(&urb->dev->dev,
+ PREFIX "input urb->status: %i\n", urb->status);
+
+ if (!bcd2k || urb->status == -ESHUTDOWN)
+ return;
+
+ if (urb->actual_length > 0)
+ bcd2000_midi_handle_input(bcd2k, urb->transfer_buffer,
+ urb->actual_length);
+
+ /* return URB to device */
+ ret = usb_submit_urb(bcd2k->midi.in_urb, GFP_ATOMIC);
+ if (ret < 0)
+ dev_err(&bcd2k->dev->dev, PREFIX
+ "%s: usb_submit_urb() failed, ret=%d\n",
+ __func__, ret);
+}
+
+static struct snd_rawmidi_ops bcd2000_midi_output = {
+ .open = bcd2000_midi_output_open,
+ .close = bcd2000_midi_output_close,
+ .trigger = bcd2000_midi_output_trigger,
+};
+
+static struct snd_rawmidi_ops bcd2000_midi_input = {
+ .open = bcd2000_midi_input_open,
+ .close = bcd2000_midi_input_close,
+ .trigger = bcd2000_midi_input_trigger,
+};
+
+int bcd2000_init_midi(struct bcd2000 *bcd2k)
+{
+ int ret;
+ struct snd_rawmidi *rmidi;
+ struct bcd2000_midi *midi;
+
+ ret = snd_rawmidi_new(bcd2k->card, bcd2k->card->shortname, 0,
+ 1, /* output */
+ 1, /* input */
+ &rmidi);
+
+ if (ret < 0)
+ return ret;
+
+ strlcpy(rmidi->name, bcd2k->card->shortname, sizeof(rmidi->name));
+
+ rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
+ rmidi->private_data = bcd2k;
+
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+ &bcd2000_midi_output);
+
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+ &bcd2000_midi_input);
+
+ midi = &bcd2k->midi;
+ midi->rmidi = rmidi;
+
+ midi->in_urb = usb_alloc_urb(0, GFP_KERNEL);
+ midi->out_urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (!midi->in_urb || !midi->out_urb) {
+ dev_err(&bcd2k->dev->dev, PREFIX "usb_alloc_urb failed\n");
+ return -ENOMEM;
+ }
+
+ usb_fill_int_urb(midi->in_urb, bcd2k->dev,
+ usb_rcvintpipe(bcd2k->dev, 0x81),
+ midi->in_buffer, MIDI_URB_BUFSIZE,
+ bcd2000_input_complete, bcd2k, 1);
+
+ usb_fill_int_urb(midi->out_urb, bcd2k->dev,
+ usb_sndintpipe(bcd2k->dev, 0x1),
+ midi->out_buffer, MIDI_URB_BUFSIZE,
+ bcd2000_output_complete, bcd2k, 1);
+
+ init_usb_anchor(&midi->anchor);
+ usb_anchor_urb(midi->out_urb, &midi->anchor);
+ usb_anchor_urb(midi->in_urb, &midi->anchor);
+
+ /* copy init sequence into buffer */
+ memcpy(midi->out_buffer, bcd2000_init_sequence, 52);
+ midi->out_urb->transfer_buffer_length = 52;
+
+ /* submit sequence */
+ ret = usb_submit_urb(midi->out_urb, GFP_KERNEL);
+ if (ret < 0)
+ dev_err(&bcd2k->dev->dev, PREFIX
+ "%s: usb_submit_urb() out failed, ret=%d: ",
+ __func__, ret);
+ else
+ midi->out_active = 1;
+
+ /* pass URB to device to enable button and controller events */
+ ret = usb_submit_urb(midi->in_urb, GFP_KERNEL);
+ if (ret < 0)
+ dev_err(&bcd2k->dev->dev, PREFIX
+ "%s: usb_submit_urb() in failed, ret=%d: ",
+ __func__, ret);
+
+ /* ensure initialization is finished */
+ usb_wait_anchor_empty_timeout(&midi->anchor, 1000);
+
+ return 0;
+}
+
+void bcd2000_free_midi(struct bcd2000 *bcd2k)
+{
+ /* usb_kill_urb not necessary, urb is aborted automatically */
+ usb_free_urb(bcd2k->midi.out_urb);
+ usb_free_urb(bcd2k->midi.in_urb);
+}
diff --git a/sound/usb/bcd2000/midi.h b/sound/usb/bcd2000/midi.h
new file mode 100644
index 0000000..a4d9fd8
--- /dev/null
+++ b/sound/usb/bcd2000/midi.h
@@ -0,0 +1,31 @@
+#ifndef MIDI_H
+#define MIDI_H
+
+#include <sound/rawmidi.h>
+
+#define MIDI_URB_BUFSIZE 64
+#define MIDI_CMD_PREFIX_INIT {0x03, 0x00}
+
+struct bcd2000;
+
+struct bcd2000_midi {
+ struct bcd2000 *bcd2k;
+
+ int out_active;
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_substream *receive_substream;
+ struct snd_rawmidi_substream *send_substream;
+
+ unsigned char in_buffer[MIDI_URB_BUFSIZE];
+ unsigned char out_buffer[MIDI_URB_BUFSIZE];
+
+ struct urb *out_urb;
+ struct urb *in_urb;
+
+ struct usb_anchor anchor;
+};
+
+int bcd2000_init_midi(struct bcd2000 *bcd2k);
+void bcd2000_free_midi(struct bcd2000 *bcd2k);
+
+#endif
--
2.0.5
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