diff options
Diffstat (limited to 'sound/oss/emu10k1/midi.c')
| -rw-r--r-- | sound/oss/emu10k1/midi.c | 613 |
1 files changed, 613 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/midi.c b/sound/oss/emu10k1/midi.c new file mode 100644 index 0000000..33dea3d --- /dev/null +++ b/sound/oss/emu10k1/midi.c @@ -0,0 +1,613 @@ +/* + ********************************************************************** + * midi.c - /dev/midi interface for emu10k1 driver + * Copyright 1999, 2000 Creative Labs, Inc. + * + ********************************************************************** + * + * Date Author Summary of changes + * ---- ------ ------------------ + * October 20, 1999 Bertrand Lee base code release + * + ********************************************************************** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, + * USA. + * + ********************************************************************** + */ + +#include <linux/module.h> +#include <linux/poll.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/smp_lock.h> +#include <asm/uaccess.h> + +#include "hwaccess.h" +#include "cardmo.h" +#include "cardmi.h" +#include "midi.h" + +#ifdef EMU10K1_SEQUENCER +#include "../sound_config.h" +#endif + +static DEFINE_SPINLOCK(midi_spinlock __attribute((unused))); + +static void init_midi_hdr(struct midi_hdr *midihdr) +{ + midihdr->bufferlength = MIDIIN_BUFLEN; + midihdr->bytesrecorded = 0; + midihdr->flags = 0; +} + +static int midiin_add_buffer(struct emu10k1_mididevice *midi_dev, struct midi_hdr **midihdrptr) +{ + struct midi_hdr *midihdr; + + if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL) { + ERROR(); + return -EINVAL; + } + + init_midi_hdr(midihdr); + + if ((midihdr->data = (u8 *) kmalloc(MIDIIN_BUFLEN, GFP_KERNEL)) == NULL) { + ERROR(); + kfree(midihdr); + return -1; + } + + if (emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr) < 0) { + ERROR(); + kfree(midihdr->data); + kfree(midihdr); + return -1; + } + + *midihdrptr = midihdr; + list_add_tail(&midihdr->list, &midi_dev->mid_hdrs); + + return 0; +} + +static int emu10k1_midi_open(struct inode *inode, struct file *file) +{ + int minor = iminor(inode); + struct emu10k1_card *card = NULL; + struct emu10k1_mididevice *midi_dev; + struct list_head *entry; + + DPF(2, "emu10k1_midi_open()\n"); + + /* Check for correct device to open */ + list_for_each(entry, &emu10k1_devs) { + card = list_entry(entry, struct emu10k1_card, list); + + if (card->midi_dev == minor) + goto match; + } + + return -ENODEV; + +match: +#ifdef EMU10K1_SEQUENCER + if (card->seq_mididev) /* card is opened by sequencer */ + return -EBUSY; +#endif + + /* Wait for device to become free */ + down(&card->open_sem); + while (card->open_mode & (file->f_mode << FMODE_MIDI_SHIFT)) { + if (file->f_flags & O_NONBLOCK) { + up(&card->open_sem); + return -EBUSY; + } + + up(&card->open_sem); + interruptible_sleep_on(&card->open_wait); + + if (signal_pending(current)) { + return -ERESTARTSYS; + } + + down(&card->open_sem); + } + + if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL) + return -EINVAL; + + midi_dev->card = card; + midi_dev->mistate = MIDIIN_STATE_STOPPED; + init_waitqueue_head(&midi_dev->oWait); + init_waitqueue_head(&midi_dev->iWait); + midi_dev->ird = 0; + midi_dev->iwr = 0; + midi_dev->icnt = 0; + INIT_LIST_HEAD(&midi_dev->mid_hdrs); + + if (file->f_mode & FMODE_READ) { + struct midi_openinfo dsCardMidiOpenInfo; + struct midi_hdr *midihdr1; + struct midi_hdr *midihdr2; + + dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev; + + if (emu10k1_mpuin_open(card, &dsCardMidiOpenInfo) < 0) { + ERROR(); + kfree(midi_dev); + return -ENODEV; + } + + /* Add two buffers to receive sysex buffer */ + if (midiin_add_buffer(midi_dev, &midihdr1) < 0) { + kfree(midi_dev); + return -ENODEV; + } + + if (midiin_add_buffer(midi_dev, &midihdr2) < 0) { + list_del(&midihdr1->list); + kfree(midihdr1->data); + kfree(midihdr1); + kfree(midi_dev); + return -ENODEV; + } + } + + if (file->f_mode & FMODE_WRITE) { + struct midi_openinfo dsCardMidiOpenInfo; + + dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev; + + if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) { + ERROR(); + kfree(midi_dev); + return -ENODEV; + } + } + + file->private_data = (void *) midi_dev; + + card->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE); + + up(&card->open_sem); + + return nonseekable_open(inode, file); +} + +static int emu10k1_midi_release(struct inode *inode, struct file *file) +{ + struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data; + struct emu10k1_card *card; + + lock_kernel(); + + card = midi_dev->card; + DPF(2, "emu10k1_midi_release()\n"); + + if (file->f_mode & FMODE_WRITE) { + if (!(file->f_flags & O_NONBLOCK)) { + + while (!signal_pending(current) && (card->mpuout->firstmidiq != NULL)) { + DPF(4, "Cannot close - buffers not empty\n"); + + interruptible_sleep_on(&midi_dev->oWait); + + } + } + + emu10k1_mpuout_close(card); + } + + if (file->f_mode & FMODE_READ) { + struct midi_hdr *midihdr; + + if (midi_dev->mistate == MIDIIN_STATE_STARTED) { + emu10k1_mpuin_stop(card); + midi_dev->mistate = MIDIIN_STATE_STOPPED; + } + + emu10k1_mpuin_reset(card); + emu10k1_mpuin_close(card); + + while (!list_empty(&midi_dev->mid_hdrs)) { + midihdr = list_entry(midi_dev->mid_hdrs.next, struct midi_hdr, list); + + list_del(midi_dev->mid_hdrs.next); + kfree(midihdr->data); + kfree(midihdr); + } + } + + kfree(midi_dev); + + down(&card->open_sem); + card->open_mode &= ~((file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE)); + up(&card->open_sem); + wake_up_interruptible(&card->open_wait); + + unlock_kernel(); + + return 0; +} + +static ssize_t emu10k1_midi_read(struct file *file, char __user *buffer, size_t count, loff_t * pos) +{ + struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data; + ssize_t ret = 0; + u16 cnt; + unsigned long flags; + + DPD(4, "emu10k1_midi_read(), count %#x\n", (u32) count); + + if (!access_ok(VERIFY_WRITE, buffer, count)) + return -EFAULT; + + if (midi_dev->mistate == MIDIIN_STATE_STOPPED) { + if (emu10k1_mpuin_start(midi_dev->card) < 0) { + ERROR(); + return -EINVAL; + } + + midi_dev->mistate = MIDIIN_STATE_STARTED; + } + + while (count > 0) { + cnt = MIDIIN_BUFLEN - midi_dev->ird; + + spin_lock_irqsave(&midi_spinlock, flags); + + if (midi_dev->icnt < cnt) + cnt = midi_dev->icnt; + + spin_unlock_irqrestore(&midi_spinlock, flags); + + if (cnt > count) + cnt = count; + + if (cnt <= 0) { + if (file->f_flags & O_NONBLOCK) + return ret ? ret : -EAGAIN; + DPF(2, " Go to sleep...\n"); + + interruptible_sleep_on(&midi_dev->iWait); + + if (signal_pending(current)) + return ret ? ret : -ERESTARTSYS; + + continue; + } + + if (copy_to_user(buffer, midi_dev->iBuf + midi_dev->ird, cnt)) { + ERROR(); + return ret ? ret : -EFAULT; + } + + midi_dev->ird += cnt; + midi_dev->ird %= MIDIIN_BUFLEN; + + spin_lock_irqsave(&midi_spinlock, flags); + + midi_dev->icnt -= cnt; + + spin_unlock_irqrestore(&midi_spinlock, flags); + + count -= cnt; + buffer += cnt; + ret += cnt; + + if (midi_dev->icnt == 0) + break; + } + + return ret; +} + +static ssize_t emu10k1_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t * pos) +{ + struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data; + struct midi_hdr *midihdr; + unsigned long flags; + + DPD(4, "emu10k1_midi_write(), count=%#x\n", (u32) count); + + if (!access_ok(VERIFY_READ, buffer, count)) + return -EFAULT; + + if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL) + return -EINVAL; + + midihdr->bufferlength = count; + midihdr->bytesrecorded = 0; + midihdr->flags = 0; + + if ((midihdr->data = (u8 *) kmalloc(count, GFP_KERNEL)) == NULL) { + ERROR(); + kfree(midihdr); + return -EINVAL; + } + + if (copy_from_user(midihdr->data, buffer, count)) { + kfree(midihdr->data); + kfree(midihdr); + return -EFAULT; + } + + spin_lock_irqsave(&midi_spinlock, flags); + + if (emu10k1_mpuout_add_buffer(midi_dev->card, midihdr) < 0) { + ERROR(); + kfree(midihdr->data); + kfree(midihdr); + spin_unlock_irqrestore(&midi_spinlock, flags); + return -EINVAL; + } + + spin_unlock_irqrestore(&midi_spinlock, flags); + + return count; +} + +static unsigned int emu10k1_midi_poll(struct file *file, struct poll_table_struct *wait) +{ + struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data; + unsigned long flags; + unsigned int mask = 0; + + DPF(4, "emu10k1_midi_poll() called\n"); + + if (file->f_mode & FMODE_WRITE) + poll_wait(file, &midi_dev->oWait, wait); + + if (file->f_mode & FMODE_READ) + poll_wait(file, &midi_dev->iWait, wait); + + spin_lock_irqsave(&midi_spinlock, flags); + + if (file->f_mode & FMODE_WRITE) + mask |= POLLOUT | POLLWRNORM; + + if (file->f_mode & FMODE_READ) { + if (midi_dev->mistate == MIDIIN_STATE_STARTED) + if (midi_dev->icnt > 0) + mask |= POLLIN | POLLRDNORM; + } + + spin_unlock_irqrestore(&midi_spinlock, flags); + + return mask; +} + +int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned long *pmsg) +{ + struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) refdata; + struct midi_hdr *midihdr = NULL; + unsigned long flags; + int i; + + DPF(4, "emu10k1_midi_callback()\n"); + + spin_lock_irqsave(&midi_spinlock, flags); + + switch (msg) { + case ICARDMIDI_OUTLONGDATA: + midihdr = (struct midi_hdr *) pmsg[2]; + + kfree(midihdr->data); + kfree(midihdr); + wake_up_interruptible(&midi_dev->oWait); + + break; + + case ICARDMIDI_INLONGDATA: + midihdr = (struct midi_hdr *) pmsg[2]; + + for (i = 0; i < midihdr->bytesrecorded; i++) { + midi_dev->iBuf[midi_dev->iwr++] = midihdr->data[i]; + midi_dev->iwr %= MIDIIN_BUFLEN; + } + + midi_dev->icnt += midihdr->bytesrecorded; + + if (midi_dev->mistate == MIDIIN_STATE_STARTED) { + init_midi_hdr(midihdr); + emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr); + wake_up_interruptible(&midi_dev->iWait); + } + break; + + case ICARDMIDI_INDATA: + { + u8 *pBuf = (u8 *) & pmsg[1]; + u16 bytesvalid = pmsg[2]; + + for (i = 0; i < bytesvalid; i++) { + midi_dev->iBuf[midi_dev->iwr++] = pBuf[i]; + midi_dev->iwr %= MIDIIN_BUFLEN; + } + + midi_dev->icnt += bytesvalid; + } + + wake_up_interruptible(&midi_dev->iWait); + break; + + default: /* Unknown message */ + spin_unlock_irqrestore(&midi_spinlock, flags); + return -1; + } + + spin_unlock_irqrestore(&midi_spinlock, flags); + + return 0; +} + +/* MIDI file operations */ +struct file_operations emu10k1_midi_fops = { + .owner = THIS_MODULE, + .read = emu10k1_midi_read, + .write = emu10k1_midi_write, + .poll = emu10k1_midi_poll, + .open = emu10k1_midi_open, + .release = emu10k1_midi_release, +}; + + +#ifdef EMU10K1_SEQUENCER + +/* functions used for sequencer access */ + +int emu10k1_seq_midi_open(int dev, int mode, + void (*input) (int dev, unsigned char data), + void (*output) (int dev)) +{ + struct emu10k1_card *card; + struct midi_openinfo dsCardMidiOpenInfo; + struct emu10k1_mididevice *midi_dev; + + if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL) + return -EINVAL; + + card = midi_devs[dev]->devc; + + if (card->open_mode) /* card is opened native */ + return -EBUSY; + + DPF(2, "emu10k1_seq_midi_open()\n"); + + if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL) + return -EINVAL; + + midi_dev->card = card; + midi_dev->mistate = MIDIIN_STATE_STOPPED; + init_waitqueue_head(&midi_dev->oWait); + init_waitqueue_head(&midi_dev->iWait); + midi_dev->ird = 0; + midi_dev->iwr = 0; + midi_dev->icnt = 0; + INIT_LIST_HEAD(&midi_dev->mid_hdrs); + + dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev; + + if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) { + ERROR(); + return -ENODEV; + } + + card->seq_mididev = midi_dev; + + return 0; +} + +void emu10k1_seq_midi_close(int dev) +{ + struct emu10k1_card *card; + + DPF(2, "emu10k1_seq_midi_close()\n"); + if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL) + return; + + card = midi_devs[dev]->devc; + emu10k1_mpuout_close(card); + + if (card->seq_mididev) { + 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 = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL) + return -EINVAL; + + midihdr->bufferlength = 1; + midihdr->bytesrecorded = 0; + midihdr->flags = 0; + + if ((midihdr->data = (u8 *) kmalloc(1, GFP_KERNEL)) == NULL) { + 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 + |
