diff options
Diffstat (limited to 'sound/usb/caiaq/caiaq-midi.c')
| -rw-r--r-- | sound/usb/caiaq/caiaq-midi.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/sound/usb/caiaq/caiaq-midi.c b/sound/usb/caiaq/caiaq-midi.c new file mode 100644 index 00000000000..793ca20ce34 --- /dev/null +++ b/sound/usb/caiaq/caiaq-midi.c @@ -0,0 +1,177 @@ +/* + * 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/init.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/interrupt.h> +#include <linux/usb.h> +#include <linux/input.h> +#include <linux/spinlock.h> +#include <sound/driver.h> +#include <sound/core.h> +#include <sound/rawmidi.h> +#include <sound/pcm.h> + +#include "caiaq-device.h" +#include "caiaq-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 *dev = substream->rmidi->private_data; + + if (!dev) + return; + + dev->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) +{ + return 0; +} + +static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *dev, + struct snd_rawmidi_substream *substream) +{ + int len, ret; + + dev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE; + dev->midi_out_buf[1] = 0; /* port */ + len = snd_rawmidi_transmit_peek(substream, dev->midi_out_buf+3, EP1_BUFSIZE-3); + + if (len <= 0) + return; + + dev->midi_out_buf[2] = len; + dev->midi_out_urb.transfer_buffer_length = len+3; + + ret = usb_submit_urb(&dev->midi_out_urb, GFP_ATOMIC); + if (ret < 0) + log("snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed, %d\n", + substream, ret); +} + +static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up) +{ + struct snd_usb_caiaqdev *dev = substream->rmidi->private_data; + + if (dev->midi_out_substream != NULL) + return; + + if (!up) { + dev->midi_out_substream = NULL; + return; + } + + dev->midi_out_substream = substream; + snd_usb_caiaq_midi_send(dev, substream); +} + + +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 *dev, + int port, const char *buf, int len) +{ + if (!dev->midi_receive_substream) + return; + + snd_rawmidi_receive(dev->midi_receive_substream, buf, len); +} + +int __devinit 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; + + strcpy(rmidi->name, device->product_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 *dev = urb->context; + char *buf = urb->transfer_buffer; + + if (urb->status != 0) + return; + + if (!dev->midi_out_substream) + return; + + snd_rawmidi_transmit_ack(dev->midi_out_substream, buf[2]); + dev->midi_out_substream = NULL; + snd_usb_caiaq_midi_send(dev, dev->midi_out_substream); +} + |