266 lines
6.0 KiB
C
266 lines
6.0 KiB
C
/*
|
|
* sound/patmgr.c
|
|
*
|
|
* The patch maneger interface for the /dev/sequencer
|
|
*
|
|
* Copyright by Hannu Savolainen 1993
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met: 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer. 2.
|
|
* Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Id: patmgr.c,v 1.6 1994/09/27 17:58:22 davidg Exp $
|
|
*/
|
|
|
|
#define PATMGR_C
|
|
#include "sound_config.h"
|
|
|
|
#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_SEQUENCER)
|
|
|
|
DEFINE_WAIT_QUEUES (server_procs[MAX_SYNTH_DEV],
|
|
server_wait_flag[MAX_SYNTH_DEV]);
|
|
|
|
static struct patmgr_info *mbox[MAX_SYNTH_DEV] =
|
|
{NULL};
|
|
static volatile int msg_direction[MAX_SYNTH_DEV] =
|
|
{0};
|
|
|
|
static int pmgr_opened[MAX_SYNTH_DEV] =
|
|
{0};
|
|
|
|
#define A_TO_S 1
|
|
#define S_TO_A 2
|
|
|
|
DEFINE_WAIT_QUEUE (appl_proc, appl_wait_flag);
|
|
|
|
int
|
|
pmgr_open (int dev)
|
|
{
|
|
if (dev < 0 || dev >= num_synths)
|
|
return RET_ERROR (ENXIO);
|
|
|
|
if (pmgr_opened[dev])
|
|
return RET_ERROR (EBUSY);
|
|
pmgr_opened[dev] = 1;
|
|
|
|
RESET_WAIT_QUEUE (server_procs[dev], server_wait_flag[dev]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
pmgr_release (int dev)
|
|
{
|
|
|
|
if (mbox[dev]) /*
|
|
* Killed in action. Inform the client
|
|
*/
|
|
{
|
|
|
|
mbox[dev]->key = PM_ERROR;
|
|
mbox[dev]->parm1 = RET_ERROR (EIO);
|
|
|
|
if (SOMEONE_WAITING (appl_proc, appl_wait_flag))
|
|
WAKE_UP (appl_proc, appl_wait_flag);
|
|
}
|
|
|
|
pmgr_opened[dev] = 0;
|
|
}
|
|
|
|
int
|
|
pmgr_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
|
|
{
|
|
unsigned long flags;
|
|
int ok = 0;
|
|
|
|
if (count != sizeof (struct patmgr_info))
|
|
{
|
|
printk ("PATMGR%d: Invalid read count\n", dev);
|
|
return RET_ERROR (EIO);
|
|
}
|
|
|
|
while (!ok && !PROCESS_ABORTING (server_procs[dev], server_wait_flag[dev]))
|
|
{
|
|
DISABLE_INTR (flags);
|
|
|
|
while (!(mbox[dev] && msg_direction[dev] == A_TO_S) &&
|
|
!PROCESS_ABORTING (server_procs[dev], server_wait_flag[dev]))
|
|
{
|
|
DO_SLEEP (server_procs[dev], server_wait_flag[dev], 0);
|
|
}
|
|
|
|
if (mbox[dev] && msg_direction[dev] == A_TO_S)
|
|
{
|
|
COPY_TO_USER (buf, 0, (char *) mbox[dev], count);
|
|
msg_direction[dev] = 0;
|
|
ok = 1;
|
|
}
|
|
|
|
RESTORE_INTR (flags);
|
|
|
|
}
|
|
|
|
if (!ok)
|
|
return RET_ERROR (EINTR);
|
|
return count;
|
|
}
|
|
|
|
int
|
|
pmgr_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (count < 4)
|
|
{
|
|
printk ("PATMGR%d: Write count < 4\n", dev);
|
|
return RET_ERROR (EIO);
|
|
}
|
|
|
|
COPY_FROM_USER ((caddr_t)mbox[dev], buf, 0, 4);
|
|
|
|
if (*(unsigned char *) mbox[dev] == SEQ_FULLSIZE)
|
|
{
|
|
int tmp_dev;
|
|
|
|
tmp_dev = ((unsigned short *) mbox[dev])[2];
|
|
if (tmp_dev != dev)
|
|
return RET_ERROR (ENXIO);
|
|
|
|
return synth_devs[dev]->load_patch (dev, *(unsigned short *) mbox[dev],
|
|
buf, 4, count, 1);
|
|
}
|
|
|
|
if (count != sizeof (struct patmgr_info))
|
|
{
|
|
printk ("PATMGR%d: Invalid write count\n", dev);
|
|
return RET_ERROR (EIO);
|
|
}
|
|
|
|
/*
|
|
* If everything went OK, there should be a preallocated buffer in the
|
|
* mailbox and a client waiting.
|
|
*/
|
|
|
|
DISABLE_INTR (flags);
|
|
|
|
if (mbox[dev] && !msg_direction[dev])
|
|
{
|
|
COPY_FROM_USER (&((char *) mbox[dev])[4], buf, 4, count - 4);
|
|
msg_direction[dev] = S_TO_A;
|
|
|
|
if (SOMEONE_WAITING (appl_proc, appl_wait_flag))
|
|
{
|
|
WAKE_UP (appl_proc, appl_wait_flag);
|
|
}
|
|
}
|
|
|
|
RESTORE_INTR (flags);
|
|
|
|
return count;
|
|
}
|
|
|
|
int
|
|
pmgr_access (int dev, struct patmgr_info *rec)
|
|
{
|
|
unsigned long flags;
|
|
int err = 0;
|
|
|
|
DISABLE_INTR (flags);
|
|
|
|
if (mbox[dev])
|
|
printk (" PATMGR: Server %d mbox full. Why?\n", dev);
|
|
else
|
|
{
|
|
rec->key = PM_K_COMMAND;
|
|
mbox[dev] = rec;
|
|
msg_direction[dev] = A_TO_S;
|
|
|
|
if (SOMEONE_WAITING (server_procs[dev], server_wait_flag[dev]))
|
|
{
|
|
WAKE_UP (server_procs[dev], server_wait_flag[dev]);
|
|
}
|
|
|
|
DO_SLEEP (appl_proc, appl_wait_flag, 0);
|
|
|
|
if (msg_direction[dev] != S_TO_A)
|
|
{
|
|
rec->key = PM_ERROR;
|
|
rec->parm1 = RET_ERROR (EIO);
|
|
}
|
|
else if (rec->key == PM_ERROR)
|
|
{
|
|
err = rec->parm1;
|
|
if (err > 0)
|
|
err = -err;
|
|
}
|
|
|
|
mbox[dev] = NULL;
|
|
msg_direction[dev] = 0;
|
|
}
|
|
|
|
RESTORE_INTR (flags);
|
|
|
|
return err;
|
|
}
|
|
|
|
int
|
|
pmgr_inform (int dev, int event, unsigned long p1, unsigned long p2,
|
|
unsigned long p3, unsigned long p4)
|
|
{
|
|
unsigned long flags;
|
|
int err = 0;
|
|
|
|
if (!pmgr_opened[dev])
|
|
return 0;
|
|
|
|
DISABLE_INTR (flags);
|
|
|
|
if (mbox[dev])
|
|
printk (" PATMGR: Server %d mbox full. Why?\n", dev);
|
|
else
|
|
{
|
|
mbox[dev] =
|
|
(struct patmgr_info *) KERNEL_MALLOC (sizeof (struct patmgr_info));
|
|
|
|
mbox[dev]->key = PM_K_EVENT;
|
|
mbox[dev]->command = event;
|
|
mbox[dev]->parm1 = p1;
|
|
mbox[dev]->parm2 = p2;
|
|
mbox[dev]->parm3 = p3;
|
|
msg_direction[dev] = A_TO_S;
|
|
|
|
if (SOMEONE_WAITING (server_procs[dev], server_wait_flag[dev]))
|
|
{
|
|
WAKE_UP (server_procs[dev], server_wait_flag[dev]);
|
|
}
|
|
|
|
DO_SLEEP (appl_proc, appl_wait_flag, 0);
|
|
if (mbox[dev])
|
|
KERNEL_FREE (mbox[dev]);
|
|
mbox[dev] = NULL;
|
|
msg_direction[dev] = 0;
|
|
}
|
|
|
|
RESTORE_INTR (flags);
|
|
|
|
return err;
|
|
}
|
|
|
|
#endif
|