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/*
* sound/patmgr.c
*
* The patch manager interface for the /dev/sequencer
*/
/*
* Copyright (C) by Hannu Savolainen 1993-1996
*
* USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*/
#include <linux/config.h>
#define PATMGR_C
#include "sound_config.h"
#if defined(CONFIG_SEQUENCER)
static wait_handle *server_procs[MAX_SYNTH_DEV] =
{NULL};
static volatile struct snd_wait server_wait_flag[MAX_SYNTH_DEV] =
{
{0}};
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
static wait_handle *appl_proc = NULL;
static volatile struct snd_wait appl_wait_flag =
{0};
int
pmgr_open (int dev)
{
if (dev < 0 || dev >= num_synths)
return -(ENXIO);
if (pmgr_opened[dev])
return -(EBUSY);
pmgr_opened[dev] = 1;
server_wait_flag[dev].flags = WK_NONE;
return 0;
}
void
pmgr_release (int dev)
{
if (mbox[dev]) /*
* Killed in action. Inform the client
*/
{
mbox[dev]->key = PM_ERROR;
mbox[dev]->parm1 = -(EIO);
if ((appl_wait_flag.flags & WK_SLEEP))
{
appl_wait_flag.flags = WK_WAKEUP;
module_wake_up (&appl_proc);
};
}
pmgr_opened[dev] = 0;
}
int
pmgr_read (int dev, struct fileinfo *file, char *buf, int count)
{
unsigned long flags;
int ok = 0;
if (count != sizeof (struct patmgr_info))
{
printk ("PATMGR%d: Invalid read count\n", dev);
return -(EIO);
}
while (!ok && !current_got_fatal_signal ())
{
save_flags (flags);
cli ();
while (!(mbox[dev] && msg_direction[dev] == A_TO_S) &&
!current_got_fatal_signal ())
{
server_wait_flag[dev].flags = WK_SLEEP;
module_interruptible_sleep_on (&server_procs[dev]);
server_wait_flag[dev].flags &= ~WK_SLEEP;;
}
if (mbox[dev] && msg_direction[dev] == A_TO_S)
{
memcpy_tofs (&(buf)[0], (char *) mbox[dev], count);
msg_direction[dev] = 0;
ok = 1;
}
restore_flags (flags);
}
if (!ok)
return -(EINTR);
return count;
}
int
pmgr_write (int dev, struct fileinfo *file, const char *buf, int count)
{
unsigned long flags;
if (count < 4)
{
printk ("PATMGR%d: Write count < 4\n", dev);
return -(EIO);
}
memcpy_fromfs ((char *) 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 -(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 -(EIO);
}
/*
* If everything went OK, there should be a preallocated buffer in the
* mailbox and a client waiting.
*/
save_flags (flags);
cli ();
if (mbox[dev] && !msg_direction[dev])
{
memcpy_fromfs (&((char *) mbox[dev])[4], &(buf)[4], count - 4);
msg_direction[dev] = S_TO_A;
if ((appl_wait_flag.flags & WK_SLEEP))
{
{
appl_wait_flag.flags = WK_WAKEUP;
module_wake_up (&appl_proc);
};
}
}
restore_flags (flags);
return count;
}
int
pmgr_access (int dev, struct patmgr_info *rec)
{
unsigned long flags;
int err = 0;
save_flags (flags);
cli ();
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 ((server_wait_flag[dev].flags & WK_SLEEP))
{
{
server_wait_flag[dev].flags = WK_WAKEUP;
module_wake_up (&server_procs[dev]);
};
}
appl_wait_flag.flags = WK_SLEEP;
module_interruptible_sleep_on (&appl_proc);
appl_wait_flag.flags &= ~WK_SLEEP;;
if (msg_direction[dev] != S_TO_A)
{
rec->key = PM_ERROR;
rec->parm1 = -(EIO);
}
else if (rec->key == PM_ERROR)
{
err = rec->parm1;
if (err > 0)
err = -err;
}
mbox[dev] = NULL;
msg_direction[dev] = 0;
}
restore_flags (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;
struct patmgr_info *tmp_mbox;
if (!pmgr_opened[dev])
return 0;
tmp_mbox = (struct patmgr_info *) vmalloc (sizeof (struct patmgr_info));
if (tmp_mbox == NULL)
{
printk ("pmgr: Couldn't allocate memory for a message\n");
return 0;
}
save_flags (flags);
cli ();
if (mbox[dev])
printk (" PATMGR: Server %d mbox full. Why?\n", dev);
else
{
mbox[dev] = tmp_mbox;
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 ((server_wait_flag[dev].flags & WK_SLEEP))
{
{
server_wait_flag[dev].flags = WK_WAKEUP;
module_wake_up (&server_procs[dev]);
};
}
appl_wait_flag.flags = WK_SLEEP;
module_interruptible_sleep_on (&appl_proc);
appl_wait_flag.flags &= ~WK_SLEEP;;
mbox[dev] = NULL;
msg_direction[dev] = 0;
}
restore_flags (flags);
vfree (tmp_mbox);
return err;
}
#endif
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