163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2006,2007 Daniel Mack
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*/
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#include <linux/device.h>
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#include <linux/usb.h>
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#include <linux/gfp.h>
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#include <sound/rawmidi.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include "device.h"
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#include "midi.h"
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static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)
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{
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return 0;
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}
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static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)
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{
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return 0;
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}
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static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
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if (!cdev)
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return;
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cdev->midi_receive_substream = up ? substream : NULL;
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}
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static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)
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{
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return 0;
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}
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static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)
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{
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struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
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if (cdev->midi_out_active) {
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usb_kill_urb(&cdev->midi_out_urb);
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cdev->midi_out_active = 0;
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}
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return 0;
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}
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static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *cdev,
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struct snd_rawmidi_substream *substream)
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{
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int len, ret;
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struct device *dev = caiaqdev_to_dev(cdev);
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cdev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
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cdev->midi_out_buf[1] = 0; /* port */
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len = snd_rawmidi_transmit(substream, cdev->midi_out_buf + 3,
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EP1_BUFSIZE - 3);
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if (len <= 0)
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return;
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cdev->midi_out_buf[2] = len;
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cdev->midi_out_urb.transfer_buffer_length = len+3;
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ret = usb_submit_urb(&cdev->midi_out_urb, GFP_ATOMIC);
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if (ret < 0)
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dev_err(dev,
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"snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"
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"ret=%d, len=%d\n", substream, ret, len);
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else
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cdev->midi_out_active = 1;
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}
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static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;
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if (up) {
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cdev->midi_out_substream = substream;
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if (!cdev->midi_out_active)
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snd_usb_caiaq_midi_send(cdev, substream);
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} else {
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cdev->midi_out_substream = NULL;
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}
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}
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static const struct snd_rawmidi_ops snd_usb_caiaq_midi_output =
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{
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.open = snd_usb_caiaq_midi_output_open,
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.close = snd_usb_caiaq_midi_output_close,
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.trigger = snd_usb_caiaq_midi_output_trigger,
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};
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static const struct snd_rawmidi_ops snd_usb_caiaq_midi_input =
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{
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.open = snd_usb_caiaq_midi_input_open,
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.close = snd_usb_caiaq_midi_input_close,
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.trigger = snd_usb_caiaq_midi_input_trigger,
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};
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void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *cdev,
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int port, const char *buf, int len)
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{
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if (!cdev->midi_receive_substream)
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return;
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snd_rawmidi_receive(cdev->midi_receive_substream, buf, len);
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}
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int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
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{
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int ret;
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struct snd_rawmidi *rmidi;
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ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,
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device->spec.num_midi_out,
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device->spec.num_midi_in,
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&rmidi);
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if (ret < 0)
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return ret;
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strscpy(rmidi->name, device->product_name, sizeof(rmidi->name));
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rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
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rmidi->private_data = device;
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if (device->spec.num_midi_out > 0) {
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
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&snd_usb_caiaq_midi_output);
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}
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if (device->spec.num_midi_in > 0) {
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rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
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snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
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&snd_usb_caiaq_midi_input);
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}
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device->rmidi = rmidi;
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return 0;
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}
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void snd_usb_caiaq_midi_output_done(struct urb* urb)
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{
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struct snd_usb_caiaqdev *cdev = urb->context;
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cdev->midi_out_active = 0;
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if (urb->status != 0)
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return;
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if (!cdev->midi_out_substream)
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return;
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snd_usb_caiaq_midi_send(cdev, cdev->midi_out_substream);
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}
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