1 files changed, 177 insertions, 0 deletions

diff --git a/sound/usb/caiaq/caiaq-midi.c b/sound/usb/caiaq/caiaq-midi.c
new file mode 100644
index 000000000000..793ca20ce349
--- /dev/null
+++ b/sound/usb/caiaq/caiaq-midi.c
@@ -0,0 +1,177 @@
+/*
+ *   Copyright (c) 2006,2007 Daniel Mack
+ *
+ *   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.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+*/
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <linux/input.h>
+#include <linux/spinlock.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/rawmidi.h>
+#include <sound/pcm.h>
+
+#include "caiaq-device.h"
+#include "caiaq-midi.h"
+
+
+static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)
+{
+        return 0;
+}
+
+static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)
+{
+        return 0;
+}
+
+static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+        struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
+
+        if (!dev)
+                return;
+        
+        dev->midi_receive_substream = up ? substream : NULL;
+}
+
+
+static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)
+{
+        return 0;
+}
+
+static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)
+{
+        return 0;
+}
+
+static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *dev,
+                                    struct snd_rawmidi_substream *substream)
+{
+        int len, ret;
+        
+        dev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
+        dev->midi_out_buf[1] = 0; /* port */
+        len = snd_rawmidi_transmit_peek(substream, dev->midi_out_buf+3, EP1_BUFSIZE-3);
+        
+        if (len <= 0)
+                return;
+        
+        dev->midi_out_buf[2] = len;
+        dev->midi_out_urb.transfer_buffer_length = len+3;
+        
+        ret = usb_submit_urb(&dev->midi_out_urb, GFP_ATOMIC);
+        if (ret < 0)
+                log("snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed, %d\n",
+                                substream, ret);
+}
+
+static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+        struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
+        
+        if (dev->midi_out_substream != NULL)
+                return;
+        
+        if (!up) {
+                dev->midi_out_substream = NULL;
+                return;
+        }
+        
+        dev->midi_out_substream = substream;
+        snd_usb_caiaq_midi_send(dev, substream);
+}
+
+
+static struct snd_rawmidi_ops snd_usb_caiaq_midi_output =
+{
+        .open =         snd_usb_caiaq_midi_output_open,
+        .close =        snd_usb_caiaq_midi_output_close,
+        .trigger =      snd_usb_caiaq_midi_output_trigger,
+};
+
+static struct snd_rawmidi_ops snd_usb_caiaq_midi_input =
+{
+        .open =         snd_usb_caiaq_midi_input_open,
+        .close =        snd_usb_caiaq_midi_input_close,
+        .trigger =      snd_usb_caiaq_midi_input_trigger,
+};
+
+void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *dev, 
+                                     int port, const char *buf, int len)
+{
+        if (!dev->midi_receive_substream)
+                return;
+        
+        snd_rawmidi_receive(dev->midi_receive_substream, buf, len);
+}
+
+int __devinit snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
+{
+        int ret;
+        struct snd_rawmidi *rmidi;
+
+        ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,
+                                        device->spec.num_midi_out,
+                                        device->spec.num_midi_in,
+                                        &rmidi);
+
+        if (ret < 0)
+                return ret;
+
+        strcpy(rmidi->name, device->product_name);
+
+        rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
+        rmidi->private_data = device;
+
+        if (device->spec.num_midi_out > 0) {
+                rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
+                snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 
+                                    &snd_usb_caiaq_midi_output);
+        }
+
+        if (device->spec.num_midi_in > 0) {
+                rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
+                snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 
+                                    &snd_usb_caiaq_midi_input);
+        }
+        
+        device->rmidi = rmidi;
+
+        return 0;
+}
+
+void snd_usb_caiaq_midi_output_done(struct urb* urb)
+{
+        struct snd_usb_caiaqdev *dev = urb->context;
+        char *buf = urb->transfer_buffer;
+        
+        if (urb->status != 0)
+                return;
+
+        if (!dev->midi_out_substream)
+                return;
+
+        snd_rawmidi_transmit_ack(dev->midi_out_substream, buf[2]);
+        dev->midi_out_substream = NULL;
+        snd_usb_caiaq_midi_send(dev, dev->midi_out_substream);
+}
+