615 lines
14 KiB
C
615 lines
14 KiB
C
/*
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**********************************************************************
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* midi.c - /dev/midi interface for emu10k1 driver
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* Copyright 1999, 2000 Creative Labs, Inc.
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*
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**********************************************************************
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*
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* Date Author Summary of changes
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* ---- ------ ------------------
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* October 20, 1999 Bertrand Lee base code release
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*
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**********************************************************************
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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
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* License along with this program; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*
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**********************************************************************
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*/
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/smp_lock.h>
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#include <asm/uaccess.h>
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#include "hwaccess.h"
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#include "cardmo.h"
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#include "cardmi.h"
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#include "midi.h"
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#ifdef EMU10K1_SEQUENCER
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#include "../sound_config.h"
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#endif
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static DEFINE_SPINLOCK(midi_spinlock);
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static void init_midi_hdr(struct midi_hdr *midihdr)
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{
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midihdr->bufferlength = MIDIIN_BUFLEN;
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midihdr->bytesrecorded = 0;
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midihdr->flags = 0;
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}
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static int midiin_add_buffer(struct emu10k1_mididevice *midi_dev, struct midi_hdr **midihdrptr)
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{
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struct midi_hdr *midihdr;
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if ((midihdr = kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL) {
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ERROR();
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return -EINVAL;
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}
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init_midi_hdr(midihdr);
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midihdr->data = kmalloc(MIDIIN_BUFLEN, GFP_KERNEL);
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if (!midihdr->data) {
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ERROR();
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kfree(midihdr);
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return -1;
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}
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if (emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr) < 0) {
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ERROR();
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kfree(midihdr->data);
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kfree(midihdr);
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return -1;
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}
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*midihdrptr = midihdr;
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list_add_tail(&midihdr->list, &midi_dev->mid_hdrs);
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return 0;
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}
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static int emu10k1_midi_open(struct inode *inode, struct file *file)
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{
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int minor = iminor(inode);
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struct emu10k1_card *card = NULL;
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struct emu10k1_mididevice *midi_dev;
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struct list_head *entry;
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DPF(2, "emu10k1_midi_open()\n");
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/* Check for correct device to open */
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list_for_each(entry, &emu10k1_devs) {
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card = list_entry(entry, struct emu10k1_card, list);
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if (card->midi_dev == minor)
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goto match;
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}
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return -ENODEV;
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match:
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#ifdef EMU10K1_SEQUENCER
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if (card->seq_mididev) /* card is opened by sequencer */
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return -EBUSY;
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#endif
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/* Wait for device to become free */
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mutex_lock(&card->open_sem);
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while (card->open_mode & (file->f_mode << FMODE_MIDI_SHIFT)) {
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if (file->f_flags & O_NONBLOCK) {
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mutex_unlock(&card->open_sem);
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return -EBUSY;
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}
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mutex_unlock(&card->open_sem);
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interruptible_sleep_on(&card->open_wait);
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if (signal_pending(current)) {
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return -ERESTARTSYS;
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}
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mutex_lock(&card->open_sem);
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}
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if ((midi_dev = kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
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return -EINVAL;
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midi_dev->card = card;
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midi_dev->mistate = MIDIIN_STATE_STOPPED;
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init_waitqueue_head(&midi_dev->oWait);
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init_waitqueue_head(&midi_dev->iWait);
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midi_dev->ird = 0;
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midi_dev->iwr = 0;
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midi_dev->icnt = 0;
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INIT_LIST_HEAD(&midi_dev->mid_hdrs);
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if (file->f_mode & FMODE_READ) {
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struct midi_openinfo dsCardMidiOpenInfo;
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struct midi_hdr *midihdr1;
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struct midi_hdr *midihdr2;
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dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
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if (emu10k1_mpuin_open(card, &dsCardMidiOpenInfo) < 0) {
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ERROR();
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kfree(midi_dev);
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return -ENODEV;
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}
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/* Add two buffers to receive sysex buffer */
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if (midiin_add_buffer(midi_dev, &midihdr1) < 0) {
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kfree(midi_dev);
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return -ENODEV;
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}
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if (midiin_add_buffer(midi_dev, &midihdr2) < 0) {
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list_del(&midihdr1->list);
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kfree(midihdr1->data);
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kfree(midihdr1);
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kfree(midi_dev);
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return -ENODEV;
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}
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}
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if (file->f_mode & FMODE_WRITE) {
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struct midi_openinfo dsCardMidiOpenInfo;
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dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
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if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
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ERROR();
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kfree(midi_dev);
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return -ENODEV;
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}
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}
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file->private_data = (void *) midi_dev;
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card->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE);
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mutex_unlock(&card->open_sem);
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return nonseekable_open(inode, file);
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}
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static int emu10k1_midi_release(struct inode *inode, struct file *file)
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{
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struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
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struct emu10k1_card *card;
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lock_kernel();
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card = midi_dev->card;
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DPF(2, "emu10k1_midi_release()\n");
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if (file->f_mode & FMODE_WRITE) {
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if (!(file->f_flags & O_NONBLOCK)) {
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while (!signal_pending(current) && (card->mpuout->firstmidiq != NULL)) {
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DPF(4, "Cannot close - buffers not empty\n");
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interruptible_sleep_on(&midi_dev->oWait);
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}
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}
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emu10k1_mpuout_close(card);
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}
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if (file->f_mode & FMODE_READ) {
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struct midi_hdr *midihdr;
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if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
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emu10k1_mpuin_stop(card);
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midi_dev->mistate = MIDIIN_STATE_STOPPED;
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}
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emu10k1_mpuin_reset(card);
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emu10k1_mpuin_close(card);
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while (!list_empty(&midi_dev->mid_hdrs)) {
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midihdr = list_entry(midi_dev->mid_hdrs.next, struct midi_hdr, list);
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list_del(midi_dev->mid_hdrs.next);
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kfree(midihdr->data);
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kfree(midihdr);
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}
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}
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kfree(midi_dev);
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mutex_lock(&card->open_sem);
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card->open_mode &= ~((file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE));
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mutex_unlock(&card->open_sem);
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wake_up_interruptible(&card->open_wait);
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unlock_kernel();
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return 0;
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}
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static ssize_t emu10k1_midi_read(struct file *file, char __user *buffer, size_t count, loff_t * pos)
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{
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struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
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ssize_t ret = 0;
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u16 cnt;
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unsigned long flags;
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DPD(4, "emu10k1_midi_read(), count %#x\n", (u32) count);
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if (!access_ok(VERIFY_WRITE, buffer, count))
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return -EFAULT;
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if (midi_dev->mistate == MIDIIN_STATE_STOPPED) {
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if (emu10k1_mpuin_start(midi_dev->card) < 0) {
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ERROR();
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return -EINVAL;
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}
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midi_dev->mistate = MIDIIN_STATE_STARTED;
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}
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while (count > 0) {
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cnt = MIDIIN_BUFLEN - midi_dev->ird;
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spin_lock_irqsave(&midi_spinlock, flags);
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if (midi_dev->icnt < cnt)
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cnt = midi_dev->icnt;
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spin_unlock_irqrestore(&midi_spinlock, flags);
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if (cnt > count)
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cnt = count;
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if (cnt <= 0) {
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if (file->f_flags & O_NONBLOCK)
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return ret ? ret : -EAGAIN;
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DPF(2, " Go to sleep...\n");
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interruptible_sleep_on(&midi_dev->iWait);
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if (signal_pending(current))
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return ret ? ret : -ERESTARTSYS;
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continue;
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}
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if (copy_to_user(buffer, midi_dev->iBuf + midi_dev->ird, cnt)) {
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ERROR();
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return ret ? ret : -EFAULT;
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}
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midi_dev->ird += cnt;
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midi_dev->ird %= MIDIIN_BUFLEN;
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spin_lock_irqsave(&midi_spinlock, flags);
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midi_dev->icnt -= cnt;
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spin_unlock_irqrestore(&midi_spinlock, flags);
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count -= cnt;
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buffer += cnt;
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ret += cnt;
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if (midi_dev->icnt == 0)
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break;
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}
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return ret;
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}
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static ssize_t emu10k1_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t * pos)
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{
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struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
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struct midi_hdr *midihdr;
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unsigned long flags;
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DPD(4, "emu10k1_midi_write(), count=%#x\n", (u32) count);
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if (!access_ok(VERIFY_READ, buffer, count))
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return -EFAULT;
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if ((midihdr = kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
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return -EINVAL;
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midihdr->bufferlength = count;
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midihdr->bytesrecorded = 0;
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midihdr->flags = 0;
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midihdr->data = kmalloc(count, GFP_KERNEL);
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if (!midihdr->data) {
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ERROR();
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kfree(midihdr);
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return -EINVAL;
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}
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if (copy_from_user(midihdr->data, buffer, count)) {
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kfree(midihdr->data);
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kfree(midihdr);
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return -EFAULT;
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}
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spin_lock_irqsave(&midi_spinlock, flags);
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if (emu10k1_mpuout_add_buffer(midi_dev->card, midihdr) < 0) {
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ERROR();
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kfree(midihdr->data);
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kfree(midihdr);
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spin_unlock_irqrestore(&midi_spinlock, flags);
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return -EINVAL;
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}
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spin_unlock_irqrestore(&midi_spinlock, flags);
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return count;
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}
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static unsigned int emu10k1_midi_poll(struct file *file, struct poll_table_struct *wait)
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{
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struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
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unsigned long flags;
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unsigned int mask = 0;
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DPF(4, "emu10k1_midi_poll() called\n");
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if (file->f_mode & FMODE_WRITE)
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poll_wait(file, &midi_dev->oWait, wait);
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if (file->f_mode & FMODE_READ)
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poll_wait(file, &midi_dev->iWait, wait);
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spin_lock_irqsave(&midi_spinlock, flags);
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if (file->f_mode & FMODE_WRITE)
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mask |= POLLOUT | POLLWRNORM;
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if (file->f_mode & FMODE_READ) {
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if (midi_dev->mistate == MIDIIN_STATE_STARTED)
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if (midi_dev->icnt > 0)
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mask |= POLLIN | POLLRDNORM;
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}
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spin_unlock_irqrestore(&midi_spinlock, flags);
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return mask;
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}
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int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned long *pmsg)
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{
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struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) refdata;
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struct midi_hdr *midihdr = NULL;
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unsigned long flags;
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int i;
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DPF(4, "emu10k1_midi_callback()\n");
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spin_lock_irqsave(&midi_spinlock, flags);
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switch (msg) {
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case ICARDMIDI_OUTLONGDATA:
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midihdr = (struct midi_hdr *) pmsg[2];
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kfree(midihdr->data);
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kfree(midihdr);
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wake_up_interruptible(&midi_dev->oWait);
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break;
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case ICARDMIDI_INLONGDATA:
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midihdr = (struct midi_hdr *) pmsg[2];
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for (i = 0; i < midihdr->bytesrecorded; i++) {
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midi_dev->iBuf[midi_dev->iwr++] = midihdr->data[i];
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midi_dev->iwr %= MIDIIN_BUFLEN;
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}
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midi_dev->icnt += midihdr->bytesrecorded;
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if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
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init_midi_hdr(midihdr);
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emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr);
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wake_up_interruptible(&midi_dev->iWait);
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}
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break;
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case ICARDMIDI_INDATA:
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{
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u8 *pBuf = (u8 *) & pmsg[1];
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u16 bytesvalid = pmsg[2];
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for (i = 0; i < bytesvalid; i++) {
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midi_dev->iBuf[midi_dev->iwr++] = pBuf[i];
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midi_dev->iwr %= MIDIIN_BUFLEN;
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}
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midi_dev->icnt += bytesvalid;
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}
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wake_up_interruptible(&midi_dev->iWait);
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break;
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default: /* Unknown message */
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spin_unlock_irqrestore(&midi_spinlock, flags);
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return -1;
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}
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spin_unlock_irqrestore(&midi_spinlock, flags);
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return 0;
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}
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/* MIDI file operations */
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const struct file_operations emu10k1_midi_fops = {
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.owner = THIS_MODULE,
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.read = emu10k1_midi_read,
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.write = emu10k1_midi_write,
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.poll = emu10k1_midi_poll,
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.open = emu10k1_midi_open,
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.release = emu10k1_midi_release,
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};
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#ifdef EMU10K1_SEQUENCER
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/* functions used for sequencer access */
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int emu10k1_seq_midi_open(int dev, int mode,
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void (*input) (int dev, unsigned char data),
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void (*output) (int dev))
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{
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struct emu10k1_card *card;
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struct midi_openinfo dsCardMidiOpenInfo;
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struct emu10k1_mididevice *midi_dev;
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if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
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return -EINVAL;
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card = midi_devs[dev]->devc;
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if (card->open_mode) /* card is opened native */
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return -EBUSY;
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DPF(2, "emu10k1_seq_midi_open()\n");
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if ((midi_dev = kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
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return -EINVAL;
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midi_dev->card = card;
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midi_dev->mistate = MIDIIN_STATE_STOPPED;
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init_waitqueue_head(&midi_dev->oWait);
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init_waitqueue_head(&midi_dev->iWait);
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midi_dev->ird = 0;
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midi_dev->iwr = 0;
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midi_dev->icnt = 0;
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INIT_LIST_HEAD(&midi_dev->mid_hdrs);
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dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
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if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
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ERROR();
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return -ENODEV;
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}
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card->seq_mididev = midi_dev;
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return 0;
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}
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void emu10k1_seq_midi_close(int dev)
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{
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struct emu10k1_card *card;
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DPF(2, "emu10k1_seq_midi_close()\n");
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if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
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return;
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card = midi_devs[dev]->devc;
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emu10k1_mpuout_close(card);
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kfree(card->seq_mididev);
|
|
card->seq_mididev = NULL;
|
|
}
|
|
|
|
int emu10k1_seq_midi_out(int dev, unsigned char midi_byte)
|
|
{
|
|
struct emu10k1_card *card;
|
|
struct midi_hdr *midihdr;
|
|
unsigned long flags;
|
|
|
|
if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
|
|
return -EINVAL;
|
|
|
|
card = midi_devs[dev]->devc;
|
|
|
|
if ((midihdr = kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
|
|
return -EINVAL;
|
|
|
|
midihdr->bufferlength = 1;
|
|
midihdr->bytesrecorded = 0;
|
|
midihdr->flags = 0;
|
|
|
|
midihdr->data = kmalloc(1, GFP_KERNEL);
|
|
if (!midihdr->data) {
|
|
ERROR();
|
|
kfree(midihdr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*(midihdr->data) = midi_byte;
|
|
|
|
spin_lock_irqsave(&midi_spinlock, flags);
|
|
|
|
if (emu10k1_mpuout_add_buffer(card, midihdr) < 0) {
|
|
ERROR();
|
|
kfree(midihdr->data);
|
|
kfree(midihdr);
|
|
spin_unlock_irqrestore(&midi_spinlock, flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&midi_spinlock, flags);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int emu10k1_seq_midi_start_read(int dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int emu10k1_seq_midi_end_read(int dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void emu10k1_seq_midi_kick(int dev)
|
|
{
|
|
}
|
|
|
|
int emu10k1_seq_midi_buffer_status(int dev)
|
|
{
|
|
int count;
|
|
struct midi_queue *queue;
|
|
struct emu10k1_card *card;
|
|
|
|
if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
|
|
return -EINVAL;
|
|
|
|
count = 0;
|
|
|
|
card = midi_devs[dev]->devc;
|
|
queue = card->mpuout->firstmidiq;
|
|
|
|
while (queue != NULL) {
|
|
count++;
|
|
if (queue == card->mpuout->lastmidiq)
|
|
break;
|
|
|
|
queue = queue->next;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
#endif
|
|
|