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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2006,2007 Daniel Mack
*/
#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 const 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 const 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;
strscpy(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);
}
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