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/*
* sound/patmgr.c
*
* The patch manager 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.
*
*/
#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 (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
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