diff options
Diffstat (limited to 'drivers/staging/line6/midi.c')
| -rw-r--r-- | drivers/staging/line6/midi.c | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/drivers/staging/line6/midi.c b/drivers/staging/line6/midi.c deleted file mode 100644 index 1ac343b649c1..000000000000 --- a/drivers/staging/line6/midi.c +++ /dev/null @@ -1,321 +0,0 @@ -/* - * Line6 Linux USB driver - 0.9.1beta - * - * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) - * - * 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, version 2. - * - */ - -#include <linux/slab.h> -#include <linux/usb.h> -#include <sound/core.h> -#include <sound/rawmidi.h> - -#include "audio.h" -#include "driver.h" -#include "midi.h" -#include "pod.h" -#include "usbdefs.h" - -#define line6_rawmidi_substream_midi(substream) \ - ((struct snd_line6_midi *)((substream)->rmidi->private_data)) - -static int send_midi_async(struct usb_line6 *line6, unsigned char *data, - int length); - -/* - Pass data received via USB to MIDI. -*/ -void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, - int length) -{ - if (line6->line6midi->substream_receive) - snd_rawmidi_receive(line6->line6midi->substream_receive, - data, length); -} - -/* - Read data from MIDI buffer and transmit them via USB. -*/ -static void line6_midi_transmit(struct snd_rawmidi_substream *substream) -{ - struct usb_line6 *line6 = - line6_rawmidi_substream_midi(substream)->line6; - struct snd_line6_midi *line6midi = line6->line6midi; - struct midi_buffer *mb = &line6midi->midibuf_out; - unsigned long flags; - unsigned char chunk[LINE6_FALLBACK_MAXPACKETSIZE]; - int req, done; - - spin_lock_irqsave(&line6->line6midi->midi_transmit_lock, flags); - - for (;;) { - req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size); - done = snd_rawmidi_transmit_peek(substream, chunk, req); - - if (done == 0) - break; - - line6_midibuf_write(mb, chunk, done); - snd_rawmidi_transmit_ack(substream, done); - } - - for (;;) { - done = line6_midibuf_read(mb, chunk, - LINE6_FALLBACK_MAXPACKETSIZE); - - if (done == 0) - break; - - send_midi_async(line6, chunk, done); - } - - spin_unlock_irqrestore(&line6->line6midi->midi_transmit_lock, flags); -} - -/* - Notification of completion of MIDI transmission. -*/ -static void midi_sent(struct urb *urb) -{ - unsigned long flags; - int status; - int num; - struct usb_line6 *line6 = (struct usb_line6 *)urb->context; - - status = urb->status; - kfree(urb->transfer_buffer); - usb_free_urb(urb); - - if (status == -ESHUTDOWN) - return; - - spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags); - num = --line6->line6midi->num_active_send_urbs; - - if (num == 0) { - line6_midi_transmit(line6->line6midi->substream_transmit); - num = line6->line6midi->num_active_send_urbs; - } - - if (num == 0) - wake_up(&line6->line6midi->send_wait); - - spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags); -} - -/* - Send an asynchronous MIDI message. - Assumes that line6->line6midi->send_urb_lock is held - (i.e., this function is serialized). -*/ -static int send_midi_async(struct usb_line6 *line6, unsigned char *data, - int length) -{ - struct urb *urb; - int retval; - unsigned char *transfer_buffer; - - urb = usb_alloc_urb(0, GFP_ATOMIC); - - if (urb == NULL) { - dev_err(line6->ifcdev, "Out of memory\n"); - return -ENOMEM; - } - - transfer_buffer = kmemdup(data, length, GFP_ATOMIC); - - if (transfer_buffer == NULL) { - usb_free_urb(urb); - dev_err(line6->ifcdev, "Out of memory\n"); - return -ENOMEM; - } - - usb_fill_int_urb(urb, line6->usbdev, - usb_sndbulkpipe(line6->usbdev, - line6->ep_control_write), - transfer_buffer, length, midi_sent, line6, - line6->interval); - urb->actual_length = 0; - retval = usb_submit_urb(urb, GFP_ATOMIC); - - if (retval < 0) { - dev_err(line6->ifcdev, "usb_submit_urb failed\n"); - usb_free_urb(urb); - return retval; - } - - ++line6->line6midi->num_active_send_urbs; - return 0; -} - -static int line6_midi_output_open(struct snd_rawmidi_substream *substream) -{ - return 0; -} - -static int line6_midi_output_close(struct snd_rawmidi_substream *substream) -{ - return 0; -} - -static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream, - int up) -{ - unsigned long flags; - struct usb_line6 *line6 = - line6_rawmidi_substream_midi(substream)->line6; - - line6->line6midi->substream_transmit = substream; - spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags); - - if (line6->line6midi->num_active_send_urbs == 0) - line6_midi_transmit(substream); - - spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags); -} - -static void line6_midi_output_drain(struct snd_rawmidi_substream *substream) -{ - struct usb_line6 *line6 = - line6_rawmidi_substream_midi(substream)->line6; - struct snd_line6_midi *midi = line6->line6midi; - - wait_event_interruptible(midi->send_wait, - midi->num_active_send_urbs == 0); -} - -static int line6_midi_input_open(struct snd_rawmidi_substream *substream) -{ - return 0; -} - -static int line6_midi_input_close(struct snd_rawmidi_substream *substream) -{ - return 0; -} - -static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream, - int up) -{ - struct usb_line6 *line6 = - line6_rawmidi_substream_midi(substream)->line6; - - if (up) - line6->line6midi->substream_receive = substream; - else - line6->line6midi->substream_receive = NULL; -} - -static struct snd_rawmidi_ops line6_midi_output_ops = { - .open = line6_midi_output_open, - .close = line6_midi_output_close, - .trigger = line6_midi_output_trigger, - .drain = line6_midi_output_drain, -}; - -static struct snd_rawmidi_ops line6_midi_input_ops = { - .open = line6_midi_input_open, - .close = line6_midi_input_close, - .trigger = line6_midi_input_trigger, -}; - -/* - Cleanup the Line6 MIDI device. -*/ -static void line6_cleanup_midi(struct snd_rawmidi *rmidi) -{ -} - -/* Create a MIDI device */ -static int snd_line6_new_midi(struct snd_line6_midi *line6midi) -{ - struct snd_rawmidi *rmidi; - int err; - - err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1, - &rmidi); - if (err < 0) - return err; - - rmidi->private_data = line6midi; - rmidi->private_free = line6_cleanup_midi; - strcpy(rmidi->id, line6midi->line6->properties->id); - strcpy(rmidi->name, line6midi->line6->properties->name); - - rmidi->info_flags = - SNDRV_RAWMIDI_INFO_OUTPUT | - SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX; - - snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, - &line6_midi_output_ops); - snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, - &line6_midi_input_ops); - return 0; -} - -/* MIDI device destructor */ -static int snd_line6_midi_free(struct snd_device *device) -{ - struct snd_line6_midi *line6midi = device->device_data; - - line6_midibuf_destroy(&line6midi->midibuf_in); - line6_midibuf_destroy(&line6midi->midibuf_out); - return 0; -} - -/* - Initialize the Line6 MIDI subsystem. -*/ -int line6_init_midi(struct usb_line6 *line6) -{ - static struct snd_device_ops midi_ops = { - .dev_free = snd_line6_midi_free, - }; - - int err; - struct snd_line6_midi *line6midi; - - if (!(line6->properties->capabilities & LINE6_BIT_CONTROL)) { - /* skip MIDI initialization and report success */ - return 0; - } - - line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL); - - if (line6midi == NULL) - return -ENOMEM; - - err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0); - if (err < 0) { - kfree(line6midi); - return err; - } - - err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1); - if (err < 0) { - kfree(line6midi->midibuf_in.buf); - kfree(line6midi); - return err; - } - - line6midi->line6 = line6; - line6->line6midi = line6midi; - - err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi, - &midi_ops); - if (err < 0) - return err; - - err = snd_line6_new_midi(line6midi); - if (err < 0) - return err; - - init_waitqueue_head(&line6midi->send_wait); - spin_lock_init(&line6midi->send_urb_lock); - spin_lock_init(&line6midi->midi_transmit_lock); - return 0; -} |