Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / usb / caiaq / midi.c

diff --git a/kernel/sound/usb/caiaq/midi.c b/kernel/sound/usb/caiaq/midi.c
new file mode 100644 (file)
index 0000000..2d75884
--- /dev/null
+++ b/kernel/sound/usb/caiaq/midi.c
@@ -0,0 +1,175 @@
+/*
+ *   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/device.h>
+#include <linux/usb.h>
+#include <linux/gfp.h>
+#include <sound/rawmidi.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include "device.h"
+#include "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 *cdev = substream->rmidi->private_data;
+
+       if (!cdev)
+               return;
+
+       cdev->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)
+{
+       struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
+       if (cdev->midi_out_active) {
+               usb_kill_urb(&cdev->midi_out_urb);
+               cdev->midi_out_active = 0;
+       }
+       return 0;
+}
+
+static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *cdev,
+                                   struct snd_rawmidi_substream *substream)
+{
+       int len, ret;
+       struct device *dev = caiaqdev_to_dev(cdev);
+
+       cdev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
+       cdev->midi_out_buf[1] = 0; /* port */
+       len = snd_rawmidi_transmit(substream, cdev->midi_out_buf + 3,
+                                  EP1_BUFSIZE - 3);
+
+       if (len <= 0)
+               return;
+
+       cdev->midi_out_buf[2] = len;
+       cdev->midi_out_urb.transfer_buffer_length = len+3;
+
+       ret = usb_submit_urb(&cdev->midi_out_urb, GFP_ATOMIC);
+       if (ret < 0)
+               dev_err(dev,
+                       "snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"
+                       "ret=%d, len=%d\n", substream, ret, len);
+       else
+               cdev->midi_out_active = 1;
+}
+
+static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+       struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
+
+       if (up) {
+               cdev->midi_out_substream = substream;
+               if (!cdev->midi_out_active)
+                       snd_usb_caiaq_midi_send(cdev, substream);
+       } else {
+               cdev->midi_out_substream = NULL;
+       }
+}
+
+
+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 *cdev,
+                                    int port, const char *buf, int len)
+{
+       if (!cdev->midi_receive_substream)
+               return;
+
+       snd_rawmidi_receive(cdev->midi_receive_substream, buf, len);
+}
+
+int 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;
+
+       strlcpy(rmidi->name, device->product_name, sizeof(rmidi->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 *cdev = urb->context;
+
+       cdev->midi_out_active = 0;
+       if (urb->status != 0)
+               return;
+
+       if (!cdev->midi_out_substream)
+               return;
+
+       snd_usb_caiaq_midi_send(cdev, cdev->midi_out_substream);
+}