![Takashi Iwai](/assets/img/avatar_default.png)
Kill snd_assert() in sound/core/*, either removed or replaced with if () with snd_BUG_ON(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
1685 lines
48 KiB
C
1685 lines
48 KiB
C
/*
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* Abstract layer for MIDI v1.0 stream
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/core.h>
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#include <linux/major.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/wait.h>
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#include <linux/mutex.h>
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#include <linux/moduleparam.h>
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#include <linux/delay.h>
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#include <sound/rawmidi.h>
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#include <sound/info.h>
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#include <sound/control.h>
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#include <sound/minors.h>
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#include <sound/initval.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
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MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
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MODULE_LICENSE("GPL");
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#ifdef CONFIG_SND_OSSEMUL
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static int midi_map[SNDRV_CARDS];
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static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
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module_param_array(midi_map, int, NULL, 0444);
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MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
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module_param_array(amidi_map, int, NULL, 0444);
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MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
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#endif /* CONFIG_SND_OSSEMUL */
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static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
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static int snd_rawmidi_dev_free(struct snd_device *device);
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static int snd_rawmidi_dev_register(struct snd_device *device);
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static int snd_rawmidi_dev_disconnect(struct snd_device *device);
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static LIST_HEAD(snd_rawmidi_devices);
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static DEFINE_MUTEX(register_mutex);
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static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
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{
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struct snd_rawmidi *rawmidi;
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list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
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if (rawmidi->card == card && rawmidi->device == device)
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return rawmidi;
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return NULL;
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}
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static inline unsigned short snd_rawmidi_file_flags(struct file *file)
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{
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switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
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case FMODE_WRITE:
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return SNDRV_RAWMIDI_LFLG_OUTPUT;
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case FMODE_READ:
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return SNDRV_RAWMIDI_LFLG_INPUT;
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default:
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return SNDRV_RAWMIDI_LFLG_OPEN;
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}
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}
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static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
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{
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struct snd_rawmidi_runtime *runtime = substream->runtime;
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return runtime->avail >= runtime->avail_min;
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}
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static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
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size_t count)
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{
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struct snd_rawmidi_runtime *runtime = substream->runtime;
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return runtime->avail >= runtime->avail_min &&
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(!substream->append || runtime->avail >= count);
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}
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static void snd_rawmidi_input_event_tasklet(unsigned long data)
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{
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struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
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substream->runtime->event(substream);
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}
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static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
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{
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struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
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substream->ops->trigger(substream, 1);
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}
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static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
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{
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struct snd_rawmidi_runtime *runtime;
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if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
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return -ENOMEM;
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spin_lock_init(&runtime->lock);
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init_waitqueue_head(&runtime->sleep);
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if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
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tasklet_init(&runtime->tasklet,
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snd_rawmidi_input_event_tasklet,
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(unsigned long)substream);
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else
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tasklet_init(&runtime->tasklet,
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snd_rawmidi_output_trigger_tasklet,
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(unsigned long)substream);
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runtime->event = NULL;
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runtime->buffer_size = PAGE_SIZE;
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runtime->avail_min = 1;
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if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
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runtime->avail = 0;
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else
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runtime->avail = runtime->buffer_size;
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if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
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kfree(runtime);
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return -ENOMEM;
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}
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runtime->appl_ptr = runtime->hw_ptr = 0;
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substream->runtime = runtime;
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return 0;
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}
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static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
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{
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struct snd_rawmidi_runtime *runtime = substream->runtime;
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kfree(runtime->buffer);
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kfree(runtime);
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substream->runtime = NULL;
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return 0;
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}
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static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
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{
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if (up) {
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tasklet_hi_schedule(&substream->runtime->tasklet);
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} else {
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tasklet_kill(&substream->runtime->tasklet);
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substream->ops->trigger(substream, 0);
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}
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}
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static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
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{
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substream->ops->trigger(substream, up);
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if (!up && substream->runtime->event)
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tasklet_kill(&substream->runtime->tasklet);
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}
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int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
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{
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unsigned long flags;
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struct snd_rawmidi_runtime *runtime = substream->runtime;
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snd_rawmidi_output_trigger(substream, 0);
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runtime->drain = 0;
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spin_lock_irqsave(&runtime->lock, flags);
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runtime->appl_ptr = runtime->hw_ptr = 0;
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runtime->avail = runtime->buffer_size;
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spin_unlock_irqrestore(&runtime->lock, flags);
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return 0;
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}
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int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
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{
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int err;
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long timeout;
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struct snd_rawmidi_runtime *runtime = substream->runtime;
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err = 0;
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runtime->drain = 1;
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timeout = wait_event_interruptible_timeout(runtime->sleep,
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(runtime->avail >= runtime->buffer_size),
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10*HZ);
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if (signal_pending(current))
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err = -ERESTARTSYS;
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if (runtime->avail < runtime->buffer_size && !timeout) {
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snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
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err = -EIO;
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}
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runtime->drain = 0;
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if (err != -ERESTARTSYS) {
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/* we need wait a while to make sure that Tx FIFOs are empty */
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if (substream->ops->drain)
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substream->ops->drain(substream);
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else
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msleep(50);
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snd_rawmidi_drop_output(substream);
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}
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return err;
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}
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int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
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{
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unsigned long flags;
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struct snd_rawmidi_runtime *runtime = substream->runtime;
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snd_rawmidi_input_trigger(substream, 0);
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runtime->drain = 0;
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spin_lock_irqsave(&runtime->lock, flags);
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runtime->appl_ptr = runtime->hw_ptr = 0;
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runtime->avail = 0;
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spin_unlock_irqrestore(&runtime->lock, flags);
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return 0;
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}
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int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
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int mode, struct snd_rawmidi_file * rfile)
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{
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struct snd_rawmidi *rmidi;
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struct list_head *list1, *list2;
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struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
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struct snd_rawmidi_runtime *input = NULL, *output = NULL;
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int err;
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if (rfile)
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rfile->input = rfile->output = NULL;
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mutex_lock(®ister_mutex);
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rmidi = snd_rawmidi_search(card, device);
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mutex_unlock(®ister_mutex);
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if (rmidi == NULL) {
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err = -ENODEV;
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goto __error1;
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}
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if (!try_module_get(rmidi->card->module)) {
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err = -EFAULT;
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goto __error1;
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}
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if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
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mutex_lock(&rmidi->open_mutex);
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if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
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if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
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err = -ENXIO;
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goto __error;
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}
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if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
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err = -ENODEV;
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goto __error;
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}
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if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
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rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
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err = -EAGAIN;
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goto __error;
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}
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}
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if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
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if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
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err = -ENXIO;
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goto __error;
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}
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if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
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err = -ENODEV;
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goto __error;
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}
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if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
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rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
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err = -EAGAIN;
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goto __error;
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}
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}
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list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
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while (1) {
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if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
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sinput = NULL;
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if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
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err = -EAGAIN;
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goto __error;
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}
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break;
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}
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sinput = list_entry(list1, struct snd_rawmidi_substream, list);
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if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
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goto __nexti;
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if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
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break;
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__nexti:
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list1 = list1->next;
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}
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list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
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while (1) {
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if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
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soutput = NULL;
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if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
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err = -EAGAIN;
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goto __error;
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}
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break;
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}
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soutput = list_entry(list2, struct snd_rawmidi_substream, list);
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if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
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if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
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if (soutput->opened && !soutput->append)
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goto __nexto;
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} else {
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if (soutput->opened)
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goto __nexto;
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}
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}
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if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
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break;
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__nexto:
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list2 = list2->next;
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}
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if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
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if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
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goto __error;
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input = sinput->runtime;
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if ((err = sinput->ops->open(sinput)) < 0)
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goto __error;
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sinput->opened = 1;
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rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
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} else {
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sinput = NULL;
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}
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if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
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if (soutput->opened)
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goto __skip_output;
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if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
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if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
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sinput->ops->close(sinput);
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goto __error;
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}
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output = soutput->runtime;
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if ((err = soutput->ops->open(soutput)) < 0) {
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if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
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sinput->ops->close(sinput);
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goto __error;
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}
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__skip_output:
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soutput->opened = 1;
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if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
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soutput->append = 1;
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if (soutput->use_count++ == 0)
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soutput->active_sensing = 1;
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rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
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} else {
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soutput = NULL;
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}
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if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
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mutex_unlock(&rmidi->open_mutex);
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if (rfile) {
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rfile->rmidi = rmidi;
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rfile->input = sinput;
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rfile->output = soutput;
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}
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return 0;
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__error:
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if (input != NULL)
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snd_rawmidi_runtime_free(sinput);
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if (output != NULL)
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snd_rawmidi_runtime_free(soutput);
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module_put(rmidi->card->module);
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if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
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mutex_unlock(&rmidi->open_mutex);
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__error1:
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return err;
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}
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static int snd_rawmidi_open(struct inode *inode, struct file *file)
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{
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int maj = imajor(inode);
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struct snd_card *card;
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int subdevice;
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unsigned short fflags;
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int err;
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struct snd_rawmidi *rmidi;
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struct snd_rawmidi_file *rawmidi_file;
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wait_queue_t wait;
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struct snd_ctl_file *kctl;
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if (maj == snd_major) {
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rmidi = snd_lookup_minor_data(iminor(inode),
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SNDRV_DEVICE_TYPE_RAWMIDI);
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#ifdef CONFIG_SND_OSSEMUL
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} else if (maj == SOUND_MAJOR) {
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rmidi = snd_lookup_oss_minor_data(iminor(inode),
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SNDRV_OSS_DEVICE_TYPE_MIDI);
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#endif
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} else
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return -ENXIO;
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|
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if (rmidi == NULL)
|
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return -ENODEV;
|
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if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
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return -EINVAL; /* invalid combination */
|
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card = rmidi->card;
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err = snd_card_file_add(card, file);
|
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if (err < 0)
|
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return -ENODEV;
|
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fflags = snd_rawmidi_file_flags(file);
|
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if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
|
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fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
|
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fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
|
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rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
|
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if (rawmidi_file == NULL) {
|
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snd_card_file_remove(card, file);
|
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return -ENOMEM;
|
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}
|
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init_waitqueue_entry(&wait, current);
|
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add_wait_queue(&rmidi->open_wait, &wait);
|
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mutex_lock(&rmidi->open_mutex);
|
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while (1) {
|
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subdevice = -1;
|
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read_lock(&card->ctl_files_rwlock);
|
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list_for_each_entry(kctl, &card->ctl_files, list) {
|
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if (kctl->pid == current->pid) {
|
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subdevice = kctl->prefer_rawmidi_subdevice;
|
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if (subdevice != -1)
|
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break;
|
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}
|
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}
|
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read_unlock(&card->ctl_files_rwlock);
|
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err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device,
|
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subdevice, fflags, rawmidi_file);
|
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if (err >= 0)
|
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break;
|
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if (err == -EAGAIN) {
|
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if (file->f_flags & O_NONBLOCK) {
|
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err = -EBUSY;
|
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break;
|
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}
|
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} else
|
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break;
|
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set_current_state(TASK_INTERRUPTIBLE);
|
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mutex_unlock(&rmidi->open_mutex);
|
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schedule();
|
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mutex_lock(&rmidi->open_mutex);
|
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if (signal_pending(current)) {
|
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err = -ERESTARTSYS;
|
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break;
|
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}
|
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}
|
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#ifdef CONFIG_SND_OSSEMUL
|
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if (rawmidi_file->input && rawmidi_file->input->runtime)
|
|
rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
|
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if (rawmidi_file->output && rawmidi_file->output->runtime)
|
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rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
|
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#endif
|
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remove_wait_queue(&rmidi->open_wait, &wait);
|
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if (err >= 0) {
|
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file->private_data = rawmidi_file;
|
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} else {
|
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snd_card_file_remove(card, file);
|
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kfree(rawmidi_file);
|
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}
|
|
mutex_unlock(&rmidi->open_mutex);
|
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return err;
|
|
}
|
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|
|
int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
|
|
{
|
|
struct snd_rawmidi *rmidi;
|
|
struct snd_rawmidi_substream *substream;
|
|
struct snd_rawmidi_runtime *runtime;
|
|
|
|
if (snd_BUG_ON(!rfile))
|
|
return -ENXIO;
|
|
rmidi = rfile->rmidi;
|
|
mutex_lock(&rmidi->open_mutex);
|
|
if (rfile->input != NULL) {
|
|
substream = rfile->input;
|
|
rfile->input = NULL;
|
|
runtime = substream->runtime;
|
|
snd_rawmidi_input_trigger(substream, 0);
|
|
substream->ops->close(substream);
|
|
if (runtime->private_free != NULL)
|
|
runtime->private_free(substream);
|
|
snd_rawmidi_runtime_free(substream);
|
|
substream->opened = 0;
|
|
rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
|
|
}
|
|
if (rfile->output != NULL) {
|
|
substream = rfile->output;
|
|
rfile->output = NULL;
|
|
if (--substream->use_count == 0) {
|
|
runtime = substream->runtime;
|
|
if (substream->active_sensing) {
|
|
unsigned char buf = 0xfe;
|
|
/* sending single active sensing message to shut the device up */
|
|
snd_rawmidi_kernel_write(substream, &buf, 1);
|
|
}
|
|
if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
|
|
snd_rawmidi_output_trigger(substream, 0);
|
|
substream->ops->close(substream);
|
|
if (runtime->private_free != NULL)
|
|
runtime->private_free(substream);
|
|
snd_rawmidi_runtime_free(substream);
|
|
substream->opened = 0;
|
|
substream->append = 0;
|
|
}
|
|
rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
|
|
}
|
|
mutex_unlock(&rmidi->open_mutex);
|
|
module_put(rmidi->card->module);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_rawmidi_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct snd_rawmidi_file *rfile;
|
|
struct snd_rawmidi *rmidi;
|
|
int err;
|
|
|
|
rfile = file->private_data;
|
|
err = snd_rawmidi_kernel_release(rfile);
|
|
rmidi = rfile->rmidi;
|
|
wake_up(&rmidi->open_wait);
|
|
kfree(rfile);
|
|
snd_card_file_remove(rmidi->card, file);
|
|
return err;
|
|
}
|
|
|
|
static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
|
|
struct snd_rawmidi_info *info)
|
|
{
|
|
struct snd_rawmidi *rmidi;
|
|
|
|
if (substream == NULL)
|
|
return -ENODEV;
|
|
rmidi = substream->rmidi;
|
|
memset(info, 0, sizeof(*info));
|
|
info->card = rmidi->card->number;
|
|
info->device = rmidi->device;
|
|
info->subdevice = substream->number;
|
|
info->stream = substream->stream;
|
|
info->flags = rmidi->info_flags;
|
|
strcpy(info->id, rmidi->id);
|
|
strcpy(info->name, rmidi->name);
|
|
strcpy(info->subname, substream->name);
|
|
info->subdevices_count = substream->pstr->substream_count;
|
|
info->subdevices_avail = (substream->pstr->substream_count -
|
|
substream->pstr->substream_opened);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
|
|
struct snd_rawmidi_info __user * _info)
|
|
{
|
|
struct snd_rawmidi_info info;
|
|
int err;
|
|
if ((err = snd_rawmidi_info(substream, &info)) < 0)
|
|
return err;
|
|
if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
|
|
{
|
|
struct snd_rawmidi *rmidi;
|
|
struct snd_rawmidi_str *pstr;
|
|
struct snd_rawmidi_substream *substream;
|
|
|
|
mutex_lock(®ister_mutex);
|
|
rmidi = snd_rawmidi_search(card, info->device);
|
|
mutex_unlock(®ister_mutex);
|
|
if (!rmidi)
|
|
return -ENXIO;
|
|
if (info->stream < 0 || info->stream > 1)
|
|
return -EINVAL;
|
|
pstr = &rmidi->streams[info->stream];
|
|
if (pstr->substream_count == 0)
|
|
return -ENOENT;
|
|
if (info->subdevice >= pstr->substream_count)
|
|
return -ENXIO;
|
|
list_for_each_entry(substream, &pstr->substreams, list) {
|
|
if ((unsigned int)substream->number == info->subdevice)
|
|
return snd_rawmidi_info(substream, info);
|
|
}
|
|
return -ENXIO;
|
|
}
|
|
|
|
static int snd_rawmidi_info_select_user(struct snd_card *card,
|
|
struct snd_rawmidi_info __user *_info)
|
|
{
|
|
int err;
|
|
struct snd_rawmidi_info info;
|
|
if (get_user(info.device, &_info->device))
|
|
return -EFAULT;
|
|
if (get_user(info.stream, &_info->stream))
|
|
return -EFAULT;
|
|
if (get_user(info.subdevice, &_info->subdevice))
|
|
return -EFAULT;
|
|
if ((err = snd_rawmidi_info_select(card, &info)) < 0)
|
|
return err;
|
|
if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
|
|
struct snd_rawmidi_params * params)
|
|
{
|
|
char *newbuf;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
if (substream->append && substream->use_count > 1)
|
|
return -EBUSY;
|
|
snd_rawmidi_drain_output(substream);
|
|
if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
|
|
return -EINVAL;
|
|
}
|
|
if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
|
|
return -EINVAL;
|
|
}
|
|
if (params->buffer_size != runtime->buffer_size) {
|
|
newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
|
|
if (!newbuf)
|
|
return -ENOMEM;
|
|
kfree(runtime->buffer);
|
|
runtime->buffer = newbuf;
|
|
runtime->buffer_size = params->buffer_size;
|
|
runtime->avail = runtime->buffer_size;
|
|
}
|
|
runtime->avail_min = params->avail_min;
|
|
substream->active_sensing = !params->no_active_sensing;
|
|
return 0;
|
|
}
|
|
|
|
int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
|
|
struct snd_rawmidi_params * params)
|
|
{
|
|
char *newbuf;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
snd_rawmidi_drain_input(substream);
|
|
if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
|
|
return -EINVAL;
|
|
}
|
|
if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
|
|
return -EINVAL;
|
|
}
|
|
if (params->buffer_size != runtime->buffer_size) {
|
|
newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
|
|
if (!newbuf)
|
|
return -ENOMEM;
|
|
kfree(runtime->buffer);
|
|
runtime->buffer = newbuf;
|
|
runtime->buffer_size = params->buffer_size;
|
|
}
|
|
runtime->avail_min = params->avail_min;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
|
|
struct snd_rawmidi_status * status)
|
|
{
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
memset(status, 0, sizeof(*status));
|
|
status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
|
|
spin_lock_irq(&runtime->lock);
|
|
status->avail = runtime->avail;
|
|
spin_unlock_irq(&runtime->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
|
|
struct snd_rawmidi_status * status)
|
|
{
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
memset(status, 0, sizeof(*status));
|
|
status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
|
|
spin_lock_irq(&runtime->lock);
|
|
status->avail = runtime->avail;
|
|
status->xruns = runtime->xruns;
|
|
runtime->xruns = 0;
|
|
spin_unlock_irq(&runtime->lock);
|
|
return 0;
|
|
}
|
|
|
|
static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct snd_rawmidi_file *rfile;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
rfile = file->private_data;
|
|
if (((cmd >> 8) & 0xff) != 'W')
|
|
return -ENOTTY;
|
|
switch (cmd) {
|
|
case SNDRV_RAWMIDI_IOCTL_PVERSION:
|
|
return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
|
|
case SNDRV_RAWMIDI_IOCTL_INFO:
|
|
{
|
|
int stream;
|
|
struct snd_rawmidi_info __user *info = argp;
|
|
if (get_user(stream, &info->stream))
|
|
return -EFAULT;
|
|
switch (stream) {
|
|
case SNDRV_RAWMIDI_STREAM_INPUT:
|
|
return snd_rawmidi_info_user(rfile->input, info);
|
|
case SNDRV_RAWMIDI_STREAM_OUTPUT:
|
|
return snd_rawmidi_info_user(rfile->output, info);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
case SNDRV_RAWMIDI_IOCTL_PARAMS:
|
|
{
|
|
struct snd_rawmidi_params params;
|
|
if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params)))
|
|
return -EFAULT;
|
|
switch (params.stream) {
|
|
case SNDRV_RAWMIDI_STREAM_OUTPUT:
|
|
if (rfile->output == NULL)
|
|
return -EINVAL;
|
|
return snd_rawmidi_output_params(rfile->output, ¶ms);
|
|
case SNDRV_RAWMIDI_STREAM_INPUT:
|
|
if (rfile->input == NULL)
|
|
return -EINVAL;
|
|
return snd_rawmidi_input_params(rfile->input, ¶ms);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
case SNDRV_RAWMIDI_IOCTL_STATUS:
|
|
{
|
|
int err = 0;
|
|
struct snd_rawmidi_status status;
|
|
if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
|
|
return -EFAULT;
|
|
switch (status.stream) {
|
|
case SNDRV_RAWMIDI_STREAM_OUTPUT:
|
|
if (rfile->output == NULL)
|
|
return -EINVAL;
|
|
err = snd_rawmidi_output_status(rfile->output, &status);
|
|
break;
|
|
case SNDRV_RAWMIDI_STREAM_INPUT:
|
|
if (rfile->input == NULL)
|
|
return -EINVAL;
|
|
err = snd_rawmidi_input_status(rfile->input, &status);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case SNDRV_RAWMIDI_IOCTL_DROP:
|
|
{
|
|
int val;
|
|
if (get_user(val, (int __user *) argp))
|
|
return -EFAULT;
|
|
switch (val) {
|
|
case SNDRV_RAWMIDI_STREAM_OUTPUT:
|
|
if (rfile->output == NULL)
|
|
return -EINVAL;
|
|
return snd_rawmidi_drop_output(rfile->output);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
case SNDRV_RAWMIDI_IOCTL_DRAIN:
|
|
{
|
|
int val;
|
|
if (get_user(val, (int __user *) argp))
|
|
return -EFAULT;
|
|
switch (val) {
|
|
case SNDRV_RAWMIDI_STREAM_OUTPUT:
|
|
if (rfile->output == NULL)
|
|
return -EINVAL;
|
|
return snd_rawmidi_drain_output(rfile->output);
|
|
case SNDRV_RAWMIDI_STREAM_INPUT:
|
|
if (rfile->input == NULL)
|
|
return -EINVAL;
|
|
return snd_rawmidi_drain_input(rfile->input);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
#ifdef CONFIG_SND_DEBUG
|
|
default:
|
|
snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
|
|
#endif
|
|
}
|
|
return -ENOTTY;
|
|
}
|
|
|
|
static int snd_rawmidi_control_ioctl(struct snd_card *card,
|
|
struct snd_ctl_file *control,
|
|
unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
|
|
{
|
|
int device;
|
|
|
|
if (get_user(device, (int __user *)argp))
|
|
return -EFAULT;
|
|
mutex_lock(®ister_mutex);
|
|
device = device < 0 ? 0 : device + 1;
|
|
while (device < SNDRV_RAWMIDI_DEVICES) {
|
|
if (snd_rawmidi_search(card, device))
|
|
break;
|
|
device++;
|
|
}
|
|
if (device == SNDRV_RAWMIDI_DEVICES)
|
|
device = -1;
|
|
mutex_unlock(®ister_mutex);
|
|
if (put_user(device, (int __user *)argp))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
|
|
{
|
|
int val;
|
|
|
|
if (get_user(val, (int __user *)argp))
|
|
return -EFAULT;
|
|
control->prefer_rawmidi_subdevice = val;
|
|
return 0;
|
|
}
|
|
case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
|
|
return snd_rawmidi_info_select_user(card, argp);
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_receive - receive the input data from the device
|
|
* @substream: the rawmidi substream
|
|
* @buffer: the buffer pointer
|
|
* @count: the data size to read
|
|
*
|
|
* Reads the data from the internal buffer.
|
|
*
|
|
* Returns the size of read data, or a negative error code on failure.
|
|
*/
|
|
int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
|
|
const unsigned char *buffer, int count)
|
|
{
|
|
unsigned long flags;
|
|
int result = 0, count1;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
if (runtime->buffer == NULL) {
|
|
snd_printd("snd_rawmidi_receive: input is not active!!!\n");
|
|
return -EINVAL;
|
|
}
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
if (count == 1) { /* special case, faster code */
|
|
substream->bytes++;
|
|
if (runtime->avail < runtime->buffer_size) {
|
|
runtime->buffer[runtime->hw_ptr++] = buffer[0];
|
|
runtime->hw_ptr %= runtime->buffer_size;
|
|
runtime->avail++;
|
|
result++;
|
|
} else {
|
|
runtime->xruns++;
|
|
}
|
|
} else {
|
|
substream->bytes += count;
|
|
count1 = runtime->buffer_size - runtime->hw_ptr;
|
|
if (count1 > count)
|
|
count1 = count;
|
|
if (count1 > (int)(runtime->buffer_size - runtime->avail))
|
|
count1 = runtime->buffer_size - runtime->avail;
|
|
memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
|
|
runtime->hw_ptr += count1;
|
|
runtime->hw_ptr %= runtime->buffer_size;
|
|
runtime->avail += count1;
|
|
count -= count1;
|
|
result += count1;
|
|
if (count > 0) {
|
|
buffer += count1;
|
|
count1 = count;
|
|
if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
|
|
count1 = runtime->buffer_size - runtime->avail;
|
|
runtime->xruns += count - count1;
|
|
}
|
|
if (count1 > 0) {
|
|
memcpy(runtime->buffer, buffer, count1);
|
|
runtime->hw_ptr = count1;
|
|
runtime->avail += count1;
|
|
result += count1;
|
|
}
|
|
}
|
|
}
|
|
if (result > 0) {
|
|
if (runtime->event)
|
|
tasklet_hi_schedule(&runtime->tasklet);
|
|
else if (snd_rawmidi_ready(substream))
|
|
wake_up(&runtime->sleep);
|
|
}
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
return result;
|
|
}
|
|
|
|
static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
|
|
unsigned char __user *userbuf,
|
|
unsigned char *kernelbuf, long count)
|
|
{
|
|
unsigned long flags;
|
|
long result = 0, count1;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
while (count > 0 && runtime->avail) {
|
|
count1 = runtime->buffer_size - runtime->appl_ptr;
|
|
if (count1 > count)
|
|
count1 = count;
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
if (count1 > (int)runtime->avail)
|
|
count1 = runtime->avail;
|
|
if (kernelbuf)
|
|
memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1);
|
|
if (userbuf) {
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
if (copy_to_user(userbuf + result,
|
|
runtime->buffer + runtime->appl_ptr, count1)) {
|
|
return result > 0 ? result : -EFAULT;
|
|
}
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
}
|
|
runtime->appl_ptr += count1;
|
|
runtime->appl_ptr %= runtime->buffer_size;
|
|
runtime->avail -= count1;
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
result += count1;
|
|
count -= count1;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
|
|
unsigned char *buf, long count)
|
|
{
|
|
snd_rawmidi_input_trigger(substream, 1);
|
|
return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
|
|
}
|
|
|
|
static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
|
|
loff_t *offset)
|
|
{
|
|
long result;
|
|
int count1;
|
|
struct snd_rawmidi_file *rfile;
|
|
struct snd_rawmidi_substream *substream;
|
|
struct snd_rawmidi_runtime *runtime;
|
|
|
|
rfile = file->private_data;
|
|
substream = rfile->input;
|
|
if (substream == NULL)
|
|
return -EIO;
|
|
runtime = substream->runtime;
|
|
snd_rawmidi_input_trigger(substream, 1);
|
|
result = 0;
|
|
while (count > 0) {
|
|
spin_lock_irq(&runtime->lock);
|
|
while (!snd_rawmidi_ready(substream)) {
|
|
wait_queue_t wait;
|
|
if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
|
|
spin_unlock_irq(&runtime->lock);
|
|
return result > 0 ? result : -EAGAIN;
|
|
}
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irq(&runtime->lock);
|
|
schedule();
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
if (signal_pending(current))
|
|
return result > 0 ? result : -ERESTARTSYS;
|
|
if (!runtime->avail)
|
|
return result > 0 ? result : -EIO;
|
|
spin_lock_irq(&runtime->lock);
|
|
}
|
|
spin_unlock_irq(&runtime->lock);
|
|
count1 = snd_rawmidi_kernel_read1(substream,
|
|
(unsigned char __user *)buf,
|
|
NULL/*kernelbuf*/,
|
|
count);
|
|
if (count1 < 0)
|
|
return result > 0 ? result : count1;
|
|
result += count1;
|
|
buf += count1;
|
|
count -= count1;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_transmit_empty - check whether the output buffer is empty
|
|
* @substream: the rawmidi substream
|
|
*
|
|
* Returns 1 if the internal output buffer is empty, 0 if not.
|
|
*/
|
|
int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
|
|
{
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
int result;
|
|
unsigned long flags;
|
|
|
|
if (runtime->buffer == NULL) {
|
|
snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
|
|
return 1;
|
|
}
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
result = runtime->avail >= runtime->buffer_size;
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_transmit_peek - copy data from the internal buffer
|
|
* @substream: the rawmidi substream
|
|
* @buffer: the buffer pointer
|
|
* @count: data size to transfer
|
|
*
|
|
* Copies data from the internal output buffer to the given buffer.
|
|
*
|
|
* Call this in the interrupt handler when the midi output is ready,
|
|
* and call snd_rawmidi_transmit_ack() after the transmission is
|
|
* finished.
|
|
*
|
|
* Returns the size of copied data, or a negative error code on failure.
|
|
*/
|
|
int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
|
|
unsigned char *buffer, int count)
|
|
{
|
|
unsigned long flags;
|
|
int result, count1;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
if (runtime->buffer == NULL) {
|
|
snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
|
|
return -EINVAL;
|
|
}
|
|
result = 0;
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
if (runtime->avail >= runtime->buffer_size) {
|
|
/* warning: lowlevel layer MUST trigger down the hardware */
|
|
goto __skip;
|
|
}
|
|
if (count == 1) { /* special case, faster code */
|
|
*buffer = runtime->buffer[runtime->hw_ptr];
|
|
result++;
|
|
} else {
|
|
count1 = runtime->buffer_size - runtime->hw_ptr;
|
|
if (count1 > count)
|
|
count1 = count;
|
|
if (count1 > (int)(runtime->buffer_size - runtime->avail))
|
|
count1 = runtime->buffer_size - runtime->avail;
|
|
memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
|
|
count -= count1;
|
|
result += count1;
|
|
if (count > 0) {
|
|
if (count > (int)(runtime->buffer_size - runtime->avail - count1))
|
|
count = runtime->buffer_size - runtime->avail - count1;
|
|
memcpy(buffer + count1, runtime->buffer, count);
|
|
result += count;
|
|
}
|
|
}
|
|
__skip:
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_transmit_ack - acknowledge the transmission
|
|
* @substream: the rawmidi substream
|
|
* @count: the tranferred count
|
|
*
|
|
* Advances the hardware pointer for the internal output buffer with
|
|
* the given size and updates the condition.
|
|
* Call after the transmission is finished.
|
|
*
|
|
* Returns the advanced size if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
|
|
{
|
|
unsigned long flags;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
if (runtime->buffer == NULL) {
|
|
snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
|
|
return -EINVAL;
|
|
}
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
|
|
runtime->hw_ptr += count;
|
|
runtime->hw_ptr %= runtime->buffer_size;
|
|
runtime->avail += count;
|
|
substream->bytes += count;
|
|
if (count > 0) {
|
|
if (runtime->drain || snd_rawmidi_ready(substream))
|
|
wake_up(&runtime->sleep);
|
|
}
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_transmit - copy from the buffer to the device
|
|
* @substream: the rawmidi substream
|
|
* @buffer: the buffer pointer
|
|
* @count: the data size to transfer
|
|
*
|
|
* Copies data from the buffer to the device and advances the pointer.
|
|
*
|
|
* Returns the copied size if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
|
|
unsigned char *buffer, int count)
|
|
{
|
|
count = snd_rawmidi_transmit_peek(substream, buffer, count);
|
|
if (count < 0)
|
|
return count;
|
|
return snd_rawmidi_transmit_ack(substream, count);
|
|
}
|
|
|
|
static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
|
|
const unsigned char __user *userbuf,
|
|
const unsigned char *kernelbuf,
|
|
long count)
|
|
{
|
|
unsigned long flags;
|
|
long count1, result;
|
|
struct snd_rawmidi_runtime *runtime = substream->runtime;
|
|
|
|
if (snd_BUG_ON(!kernelbuf && !userbuf))
|
|
return -EINVAL;
|
|
if (snd_BUG_ON(!runtime->buffer))
|
|
return -EINVAL;
|
|
|
|
result = 0;
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
if (substream->append) {
|
|
if ((long)runtime->avail < count) {
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
while (count > 0 && runtime->avail > 0) {
|
|
count1 = runtime->buffer_size - runtime->appl_ptr;
|
|
if (count1 > count)
|
|
count1 = count;
|
|
if (count1 > (long)runtime->avail)
|
|
count1 = runtime->avail;
|
|
if (kernelbuf)
|
|
memcpy(runtime->buffer + runtime->appl_ptr,
|
|
kernelbuf + result, count1);
|
|
else if (userbuf) {
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
if (copy_from_user(runtime->buffer + runtime->appl_ptr,
|
|
userbuf + result, count1)) {
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
result = result > 0 ? result : -EFAULT;
|
|
goto __end;
|
|
}
|
|
spin_lock_irqsave(&runtime->lock, flags);
|
|
}
|
|
runtime->appl_ptr += count1;
|
|
runtime->appl_ptr %= runtime->buffer_size;
|
|
runtime->avail -= count1;
|
|
result += count1;
|
|
count -= count1;
|
|
}
|
|
__end:
|
|
count1 = runtime->avail < runtime->buffer_size;
|
|
spin_unlock_irqrestore(&runtime->lock, flags);
|
|
if (count1)
|
|
snd_rawmidi_output_trigger(substream, 1);
|
|
return result;
|
|
}
|
|
|
|
long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
|
|
const unsigned char *buf, long count)
|
|
{
|
|
return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
|
|
}
|
|
|
|
static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *offset)
|
|
{
|
|
long result, timeout;
|
|
int count1;
|
|
struct snd_rawmidi_file *rfile;
|
|
struct snd_rawmidi_runtime *runtime;
|
|
struct snd_rawmidi_substream *substream;
|
|
|
|
rfile = file->private_data;
|
|
substream = rfile->output;
|
|
runtime = substream->runtime;
|
|
/* we cannot put an atomic message to our buffer */
|
|
if (substream->append && count > runtime->buffer_size)
|
|
return -EIO;
|
|
result = 0;
|
|
while (count > 0) {
|
|
spin_lock_irq(&runtime->lock);
|
|
while (!snd_rawmidi_ready_append(substream, count)) {
|
|
wait_queue_t wait;
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
spin_unlock_irq(&runtime->lock);
|
|
return result > 0 ? result : -EAGAIN;
|
|
}
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irq(&runtime->lock);
|
|
timeout = schedule_timeout(30 * HZ);
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
if (signal_pending(current))
|
|
return result > 0 ? result : -ERESTARTSYS;
|
|
if (!runtime->avail && !timeout)
|
|
return result > 0 ? result : -EIO;
|
|
spin_lock_irq(&runtime->lock);
|
|
}
|
|
spin_unlock_irq(&runtime->lock);
|
|
count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
|
|
if (count1 < 0)
|
|
return result > 0 ? result : count1;
|
|
result += count1;
|
|
buf += count1;
|
|
if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
|
|
break;
|
|
count -= count1;
|
|
}
|
|
if (file->f_flags & O_SYNC) {
|
|
spin_lock_irq(&runtime->lock);
|
|
while (runtime->avail != runtime->buffer_size) {
|
|
wait_queue_t wait;
|
|
unsigned int last_avail = runtime->avail;
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_unlock_irq(&runtime->lock);
|
|
timeout = schedule_timeout(30 * HZ);
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
if (signal_pending(current))
|
|
return result > 0 ? result : -ERESTARTSYS;
|
|
if (runtime->avail == last_avail && !timeout)
|
|
return result > 0 ? result : -EIO;
|
|
spin_lock_irq(&runtime->lock);
|
|
}
|
|
spin_unlock_irq(&runtime->lock);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
|
|
{
|
|
struct snd_rawmidi_file *rfile;
|
|
struct snd_rawmidi_runtime *runtime;
|
|
unsigned int mask;
|
|
|
|
rfile = file->private_data;
|
|
if (rfile->input != NULL) {
|
|
runtime = rfile->input->runtime;
|
|
snd_rawmidi_input_trigger(rfile->input, 1);
|
|
poll_wait(file, &runtime->sleep, wait);
|
|
}
|
|
if (rfile->output != NULL) {
|
|
runtime = rfile->output->runtime;
|
|
poll_wait(file, &runtime->sleep, wait);
|
|
}
|
|
mask = 0;
|
|
if (rfile->input != NULL) {
|
|
if (snd_rawmidi_ready(rfile->input))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
}
|
|
if (rfile->output != NULL) {
|
|
if (snd_rawmidi_ready(rfile->output))
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
}
|
|
return mask;
|
|
}
|
|
|
|
/*
|
|
*/
|
|
#ifdef CONFIG_COMPAT
|
|
#include "rawmidi_compat.c"
|
|
#else
|
|
#define snd_rawmidi_ioctl_compat NULL
|
|
#endif
|
|
|
|
/*
|
|
|
|
*/
|
|
|
|
static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_rawmidi *rmidi;
|
|
struct snd_rawmidi_substream *substream;
|
|
struct snd_rawmidi_runtime *runtime;
|
|
|
|
rmidi = entry->private_data;
|
|
snd_iprintf(buffer, "%s\n\n", rmidi->name);
|
|
mutex_lock(&rmidi->open_mutex);
|
|
if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
|
|
list_for_each_entry(substream,
|
|
&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
|
|
list) {
|
|
snd_iprintf(buffer,
|
|
"Output %d\n"
|
|
" Tx bytes : %lu\n",
|
|
substream->number,
|
|
(unsigned long) substream->bytes);
|
|
if (substream->opened) {
|
|
runtime = substream->runtime;
|
|
snd_iprintf(buffer,
|
|
" Mode : %s\n"
|
|
" Buffer size : %lu\n"
|
|
" Avail : %lu\n",
|
|
runtime->oss ? "OSS compatible" : "native",
|
|
(unsigned long) runtime->buffer_size,
|
|
(unsigned long) runtime->avail);
|
|
}
|
|
}
|
|
}
|
|
if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
|
|
list_for_each_entry(substream,
|
|
&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
|
|
list) {
|
|
snd_iprintf(buffer,
|
|
"Input %d\n"
|
|
" Rx bytes : %lu\n",
|
|
substream->number,
|
|
(unsigned long) substream->bytes);
|
|
if (substream->opened) {
|
|
runtime = substream->runtime;
|
|
snd_iprintf(buffer,
|
|
" Buffer size : %lu\n"
|
|
" Avail : %lu\n"
|
|
" Overruns : %lu\n",
|
|
(unsigned long) runtime->buffer_size,
|
|
(unsigned long) runtime->avail,
|
|
(unsigned long) runtime->xruns);
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&rmidi->open_mutex);
|
|
}
|
|
|
|
/*
|
|
* Register functions
|
|
*/
|
|
|
|
static const struct file_operations snd_rawmidi_f_ops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.read = snd_rawmidi_read,
|
|
.write = snd_rawmidi_write,
|
|
.open = snd_rawmidi_open,
|
|
.release = snd_rawmidi_release,
|
|
.poll = snd_rawmidi_poll,
|
|
.unlocked_ioctl = snd_rawmidi_ioctl,
|
|
.compat_ioctl = snd_rawmidi_ioctl_compat,
|
|
};
|
|
|
|
static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
|
|
struct snd_rawmidi_str *stream,
|
|
int direction,
|
|
int count)
|
|
{
|
|
struct snd_rawmidi_substream *substream;
|
|
int idx;
|
|
|
|
for (idx = 0; idx < count; idx++) {
|
|
substream = kzalloc(sizeof(*substream), GFP_KERNEL);
|
|
if (substream == NULL) {
|
|
snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
|
|
return -ENOMEM;
|
|
}
|
|
substream->stream = direction;
|
|
substream->number = idx;
|
|
substream->rmidi = rmidi;
|
|
substream->pstr = stream;
|
|
list_add_tail(&substream->list, &stream->substreams);
|
|
stream->substream_count++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_new - create a rawmidi instance
|
|
* @card: the card instance
|
|
* @id: the id string
|
|
* @device: the device index
|
|
* @output_count: the number of output streams
|
|
* @input_count: the number of input streams
|
|
* @rrawmidi: the pointer to store the new rawmidi instance
|
|
*
|
|
* Creates a new rawmidi instance.
|
|
* Use snd_rawmidi_set_ops() to set the operators to the new instance.
|
|
*
|
|
* Returns zero if successful, or a negative error code on failure.
|
|
*/
|
|
int snd_rawmidi_new(struct snd_card *card, char *id, int device,
|
|
int output_count, int input_count,
|
|
struct snd_rawmidi ** rrawmidi)
|
|
{
|
|
struct snd_rawmidi *rmidi;
|
|
int err;
|
|
static struct snd_device_ops ops = {
|
|
.dev_free = snd_rawmidi_dev_free,
|
|
.dev_register = snd_rawmidi_dev_register,
|
|
.dev_disconnect = snd_rawmidi_dev_disconnect,
|
|
};
|
|
|
|
if (snd_BUG_ON(!card))
|
|
return -ENXIO;
|
|
if (rrawmidi)
|
|
*rrawmidi = NULL;
|
|
rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
|
|
if (rmidi == NULL) {
|
|
snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
|
|
return -ENOMEM;
|
|
}
|
|
rmidi->card = card;
|
|
rmidi->device = device;
|
|
mutex_init(&rmidi->open_mutex);
|
|
init_waitqueue_head(&rmidi->open_wait);
|
|
INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
|
|
INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
|
|
|
|
if (id != NULL)
|
|
strlcpy(rmidi->id, id, sizeof(rmidi->id));
|
|
if ((err = snd_rawmidi_alloc_substreams(rmidi,
|
|
&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
|
|
SNDRV_RAWMIDI_STREAM_INPUT,
|
|
input_count)) < 0) {
|
|
snd_rawmidi_free(rmidi);
|
|
return err;
|
|
}
|
|
if ((err = snd_rawmidi_alloc_substreams(rmidi,
|
|
&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
|
|
SNDRV_RAWMIDI_STREAM_OUTPUT,
|
|
output_count)) < 0) {
|
|
snd_rawmidi_free(rmidi);
|
|
return err;
|
|
}
|
|
if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
|
|
snd_rawmidi_free(rmidi);
|
|
return err;
|
|
}
|
|
if (rrawmidi)
|
|
*rrawmidi = rmidi;
|
|
return 0;
|
|
}
|
|
|
|
static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
|
|
{
|
|
struct snd_rawmidi_substream *substream;
|
|
|
|
while (!list_empty(&stream->substreams)) {
|
|
substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
|
|
list_del(&substream->list);
|
|
kfree(substream);
|
|
}
|
|
}
|
|
|
|
static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
|
|
{
|
|
if (!rmidi)
|
|
return 0;
|
|
|
|
snd_info_free_entry(rmidi->proc_entry);
|
|
rmidi->proc_entry = NULL;
|
|
mutex_lock(®ister_mutex);
|
|
if (rmidi->ops && rmidi->ops->dev_unregister)
|
|
rmidi->ops->dev_unregister(rmidi);
|
|
mutex_unlock(®ister_mutex);
|
|
|
|
snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
|
|
snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
|
|
if (rmidi->private_free)
|
|
rmidi->private_free(rmidi);
|
|
kfree(rmidi);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_rawmidi_dev_free(struct snd_device *device)
|
|
{
|
|
struct snd_rawmidi *rmidi = device->device_data;
|
|
return snd_rawmidi_free(rmidi);
|
|
}
|
|
|
|
#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
|
|
static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
|
|
{
|
|
struct snd_rawmidi *rmidi = device->private_data;
|
|
rmidi->seq_dev = NULL;
|
|
}
|
|
#endif
|
|
|
|
static int snd_rawmidi_dev_register(struct snd_device *device)
|
|
{
|
|
int err;
|
|
struct snd_info_entry *entry;
|
|
char name[16];
|
|
struct snd_rawmidi *rmidi = device->device_data;
|
|
|
|
if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
|
|
return -ENOMEM;
|
|
mutex_lock(®ister_mutex);
|
|
if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
|
|
mutex_unlock(®ister_mutex);
|
|
return -EBUSY;
|
|
}
|
|
list_add_tail(&rmidi->list, &snd_rawmidi_devices);
|
|
sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
|
|
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
|
|
rmidi->card, rmidi->device,
|
|
&snd_rawmidi_f_ops, rmidi, name)) < 0) {
|
|
snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
|
|
list_del(&rmidi->list);
|
|
mutex_unlock(®ister_mutex);
|
|
return err;
|
|
}
|
|
if (rmidi->ops && rmidi->ops->dev_register &&
|
|
(err = rmidi->ops->dev_register(rmidi)) < 0) {
|
|
snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
|
|
list_del(&rmidi->list);
|
|
mutex_unlock(®ister_mutex);
|
|
return err;
|
|
}
|
|
#ifdef CONFIG_SND_OSSEMUL
|
|
rmidi->ossreg = 0;
|
|
if ((int)rmidi->device == midi_map[rmidi->card->number]) {
|
|
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
|
|
rmidi->card, 0, &snd_rawmidi_f_ops,
|
|
rmidi, name) < 0) {
|
|
snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
|
|
} else {
|
|
rmidi->ossreg++;
|
|
#ifdef SNDRV_OSS_INFO_DEV_MIDI
|
|
snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
|
|
#endif
|
|
}
|
|
}
|
|
if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
|
|
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
|
|
rmidi->card, 1, &snd_rawmidi_f_ops,
|
|
rmidi, name) < 0) {
|
|
snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
|
|
} else {
|
|
rmidi->ossreg++;
|
|
}
|
|
}
|
|
#endif /* CONFIG_SND_OSSEMUL */
|
|
mutex_unlock(®ister_mutex);
|
|
sprintf(name, "midi%d", rmidi->device);
|
|
entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
|
|
if (entry) {
|
|
entry->private_data = rmidi;
|
|
entry->c.text.read = snd_rawmidi_proc_info_read;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
rmidi->proc_entry = entry;
|
|
#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
|
|
if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
|
|
if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
|
|
rmidi->seq_dev->private_data = rmidi;
|
|
rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
|
|
sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
|
|
snd_device_register(rmidi->card, rmidi->seq_dev);
|
|
}
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int snd_rawmidi_dev_disconnect(struct snd_device *device)
|
|
{
|
|
struct snd_rawmidi *rmidi = device->device_data;
|
|
|
|
mutex_lock(®ister_mutex);
|
|
list_del_init(&rmidi->list);
|
|
#ifdef CONFIG_SND_OSSEMUL
|
|
if (rmidi->ossreg) {
|
|
if ((int)rmidi->device == midi_map[rmidi->card->number]) {
|
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
|
|
#ifdef SNDRV_OSS_INFO_DEV_MIDI
|
|
snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
|
|
#endif
|
|
}
|
|
if ((int)rmidi->device == amidi_map[rmidi->card->number])
|
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
|
|
rmidi->ossreg = 0;
|
|
}
|
|
#endif /* CONFIG_SND_OSSEMUL */
|
|
snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
|
|
mutex_unlock(®ister_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* snd_rawmidi_set_ops - set the rawmidi operators
|
|
* @rmidi: the rawmidi instance
|
|
* @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
|
|
* @ops: the operator table
|
|
*
|
|
* Sets the rawmidi operators for the given stream direction.
|
|
*/
|
|
void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
|
|
struct snd_rawmidi_ops *ops)
|
|
{
|
|
struct snd_rawmidi_substream *substream;
|
|
|
|
list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
|
|
substream->ops = ops;
|
|
}
|
|
|
|
/*
|
|
* ENTRY functions
|
|
*/
|
|
|
|
static int __init alsa_rawmidi_init(void)
|
|
{
|
|
|
|
snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
|
|
snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
|
|
#ifdef CONFIG_SND_OSSEMUL
|
|
{ int i;
|
|
/* check device map table */
|
|
for (i = 0; i < SNDRV_CARDS; i++) {
|
|
if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
|
|
snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
|
|
midi_map[i] = 0;
|
|
}
|
|
if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
|
|
snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
|
|
amidi_map[i] = 1;
|
|
}
|
|
}
|
|
}
|
|
#endif /* CONFIG_SND_OSSEMUL */
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_rawmidi_exit(void)
|
|
{
|
|
snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
|
|
snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
|
|
}
|
|
|
|
module_init(alsa_rawmidi_init)
|
|
module_exit(alsa_rawmidi_exit)
|
|
|
|
EXPORT_SYMBOL(snd_rawmidi_output_params);
|
|
EXPORT_SYMBOL(snd_rawmidi_input_params);
|
|
EXPORT_SYMBOL(snd_rawmidi_drop_output);
|
|
EXPORT_SYMBOL(snd_rawmidi_drain_output);
|
|
EXPORT_SYMBOL(snd_rawmidi_drain_input);
|
|
EXPORT_SYMBOL(snd_rawmidi_receive);
|
|
EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
|
|
EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
|
|
EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
|
|
EXPORT_SYMBOL(snd_rawmidi_transmit);
|
|
EXPORT_SYMBOL(snd_rawmidi_new);
|
|
EXPORT_SYMBOL(snd_rawmidi_set_ops);
|
|
EXPORT_SYMBOL(snd_rawmidi_info_select);
|
|
EXPORT_SYMBOL(snd_rawmidi_kernel_open);
|
|
EXPORT_SYMBOL(snd_rawmidi_kernel_release);
|
|
EXPORT_SYMBOL(snd_rawmidi_kernel_read);
|
|
EXPORT_SYMBOL(snd_rawmidi_kernel_write);
|