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162 lines
3.8 KiB
162 lines
3.8 KiB
// 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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