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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) 2006,2007 Daniel Mack4*/5 6#include <linux/device.h>7#include <linux/usb.h>8#include <linux/gfp.h>9#include <sound/rawmidi.h>10#include <sound/core.h>11#include <sound/pcm.h>12 13#include "device.h"14#include "midi.h"15 16static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)17{18 return 0;19}20 21static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)22{23 return 0;24}25 26static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)27{28 struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;29 30 if (!cdev)31 return;32 33 cdev->midi_receive_substream = up ? substream : NULL;34}35 36 37static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)38{39 return 0;40}41 42static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)43{44 struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;45 if (cdev->midi_out_active) {46 usb_kill_urb(&cdev->midi_out_urb);47 cdev->midi_out_active = 0;48 }49 return 0;50}51 52static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *cdev,53 struct snd_rawmidi_substream *substream)54{55 int len, ret;56 struct device *dev = caiaqdev_to_dev(cdev);57 58 cdev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;59 cdev->midi_out_buf[1] = 0; /* port */60 len = snd_rawmidi_transmit(substream, cdev->midi_out_buf + 3,61 EP1_BUFSIZE - 3);62 63 if (len <= 0)64 return;65 66 cdev->midi_out_buf[2] = len;67 cdev->midi_out_urb.transfer_buffer_length = len+3;68 69 ret = usb_submit_urb(&cdev->midi_out_urb, GFP_ATOMIC);70 if (ret < 0)71 dev_err(dev,72 "snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"73 "ret=%d, len=%d\n", substream, ret, len);74 else75 cdev->midi_out_active = 1;76}77 78static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)79{80 struct snd_usb_caiaqdev *cdev = substream->rmidi->private_data;81 82 if (up) {83 cdev->midi_out_substream = substream;84 if (!cdev->midi_out_active)85 snd_usb_caiaq_midi_send(cdev, substream);86 } else {87 cdev->midi_out_substream = NULL;88 }89}90 91 92static const struct snd_rawmidi_ops snd_usb_caiaq_midi_output =93{94 .open = snd_usb_caiaq_midi_output_open,95 .close = snd_usb_caiaq_midi_output_close,96 .trigger = snd_usb_caiaq_midi_output_trigger,97};98 99static const struct snd_rawmidi_ops snd_usb_caiaq_midi_input =100{101 .open = snd_usb_caiaq_midi_input_open,102 .close = snd_usb_caiaq_midi_input_close,103 .trigger = snd_usb_caiaq_midi_input_trigger,104};105 106void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *cdev,107 int port, const char *buf, int len)108{109 if (!cdev->midi_receive_substream)110 return;111 112 snd_rawmidi_receive(cdev->midi_receive_substream, buf, len);113}114 115int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)116{117 int ret;118 struct snd_rawmidi *rmidi;119 120 ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,121 device->spec.num_midi_out,122 device->spec.num_midi_in,123 &rmidi);124 125 if (ret < 0)126 return ret;127 128 strscpy(rmidi->name, device->product_name, sizeof(rmidi->name));129 130 rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;131 rmidi->private_data = device;132 133 if (device->spec.num_midi_out > 0) {134 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;135 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,136 &snd_usb_caiaq_midi_output);137 }138 139 if (device->spec.num_midi_in > 0) {140 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;141 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,142 &snd_usb_caiaq_midi_input);143 }144 145 device->rmidi = rmidi;146 147 return 0;148}149 150void snd_usb_caiaq_midi_output_done(struct urb* urb)151{152 struct snd_usb_caiaqdev *cdev = urb->context;153 154 cdev->midi_out_active = 0;155 if (urb->status != 0)156 return;157 158 if (!cdev->midi_out_substream)159 return;160 161 snd_usb_caiaq_midi_send(cdev, cdev->midi_out_substream);162}163