268 lines
6.0 KiB
C
268 lines
6.0 KiB
C
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/*
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* sound/patmgr.c
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*
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* The patch maneger interface for the /dev/sequencer
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*
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* Copyright by Hannu Savolainen 1993
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#define PATMGR_C
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#include <i386/isa/sound/sound_config.h>
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#if defined(CONFIG_SEQUENCER)
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static int *server_procs[MAX_SYNTH_DEV] = {NULL};
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static volatile struct snd_wait server_wait_flag[MAX_SYNTH_DEV] = { {0}};
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static struct patmgr_info *mbox[MAX_SYNTH_DEV] = {NULL};
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static volatile int msg_direction[MAX_SYNTH_DEV] = {0};
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static int pmgr_opened[MAX_SYNTH_DEV] = {0};
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#define A_TO_S 1
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#define S_TO_A 2
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static int *appl_proc = NULL;
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static volatile struct snd_wait appl_wait_flag =
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{0};
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int
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pmgr_open(int dev)
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{
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if (dev < 0 || dev >= num_synths)
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return -(ENXIO);
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if (pmgr_opened[dev])
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return -(EBUSY);
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pmgr_opened[dev] = 1;
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server_wait_flag[dev].aborting = 0;
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server_wait_flag[dev].mode = WK_NONE;
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return 0;
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}
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void
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pmgr_release(int dev)
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{
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if (mbox[dev]) { /* Killed in action. Inform the client */
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mbox[dev]->key = PM_ERROR;
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mbox[dev]->parm1 = -(EIO);
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if ((appl_wait_flag.mode & WK_SLEEP)) {
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appl_wait_flag.mode = WK_WAKEUP;
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wakeup(appl_proc);
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};
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}
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pmgr_opened[dev] = 0;
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}
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int
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pmgr_read(int dev, struct fileinfo * file, snd_rw_buf * buf, int count)
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{
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u_long flags;
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int ok = 0;
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if (count != sizeof(struct patmgr_info)) {
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printf("PATMGR%d: Invalid read count\n", dev);
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return -(EIO);
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}
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while (!ok && !(server_wait_flag[dev].aborting)) {
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flags = splhigh();
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while (!(mbox[dev] && msg_direction[dev] == A_TO_S) &&
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!(server_wait_flag[dev].aborting)) {
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int chn;
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server_procs[dev] = &chn;
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DO_SLEEP(chn, server_wait_flag[dev], 0);
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}
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if (mbox[dev] && msg_direction[dev] == A_TO_S) {
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if (uiomove((char *) mbox[dev], count, buf)) {
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printf("sb: Bad copyout()!\n");
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};
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msg_direction[dev] = 0;
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ok = 1;
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}
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splx(flags);
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}
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if (!ok)
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return -(EINTR);
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return count;
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}
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int
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pmgr_write(int dev, struct fileinfo * file, snd_rw_buf * buf, int count)
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{
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u_long flags;
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if (count < 4) {
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printf("PATMGR%d: Write count < 4\n", dev);
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return -(EIO);
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}
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if (uiomove((char *) mbox[dev], 4, buf)) {
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printf("sb: Bad copyin()!\n");
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};
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if (*(u_char *) mbox[dev] == SEQ_FULLSIZE) {
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int tmp_dev;
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tmp_dev = ((u_short *) mbox[dev])[2];
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if (tmp_dev != dev)
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return -(ENXIO);
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return synth_devs[dev]->load_patch(dev, *(u_short *) mbox[dev],
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buf, 4, count, 1);
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}
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if (count != sizeof(struct patmgr_info)) {
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printf("PATMGR%d: Invalid write count\n", dev);
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return -(EIO);
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}
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/*
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* If everything went OK, there should be a preallocated buffer in
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* the mailbox and a client waiting.
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*/
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flags = splhigh();
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if (mbox[dev] && !msg_direction[dev]) {
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if (uiomove(&((char *) mbox[dev])[4], count - 4, buf)) {
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printf("sb: Bad copyin()!\n");
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};
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msg_direction[dev] = S_TO_A;
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if ((appl_wait_flag.mode & WK_SLEEP)) {
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appl_wait_flag.mode = WK_WAKEUP;
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wakeup(appl_proc);
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}
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}
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splx(flags);
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return count;
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}
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int
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pmgr_access(int dev, struct patmgr_info * rec)
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{
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u_long flags;
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int err = 0;
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flags = splhigh();
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if (mbox[dev])
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printf(" PATMGR: Server %d mbox full. Why?\n", dev);
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else {
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int chn;
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rec->key = PM_K_COMMAND;
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mbox[dev] = rec;
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msg_direction[dev] = A_TO_S;
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if ((server_wait_flag[dev].mode & WK_SLEEP)) {
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server_wait_flag[dev].mode = WK_WAKEUP;
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wakeup(server_procs[dev]);
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}
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appl_proc = &chn;
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DO_SLEEP(chn, appl_wait_flag, 0);
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if (msg_direction[dev] != S_TO_A) {
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rec->key = PM_ERROR;
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rec->parm1 = -(EIO);
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} else if (rec->key == PM_ERROR) {
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err = rec->parm1;
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if (err > 0)
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err = -err;
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}
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mbox[dev] = NULL;
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msg_direction[dev] = 0;
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}
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splx(flags);
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return err;
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}
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int
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pmgr_inform(int dev, int event, u_long p1, u_long p2, u_long p3, u_long p4)
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{
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u_long flags;
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int err = 0;
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struct patmgr_info *tmp_mbox;
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if (!pmgr_opened[dev])
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return 0;
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tmp_mbox = (struct patmgr_info *) malloc(sizeof(struct patmgr_info), M_TEMP, M_WAITOK);
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if (tmp_mbox == NULL) {
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printf("pmgr: Couldn't allocate memory for a message\n");
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return 0;
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}
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flags = splhigh();
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if (mbox[dev])
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printf(" PATMGR: Server %d mbox full. Why?\n", dev);
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else {
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int chn;
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mbox[dev] = tmp_mbox;
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mbox[dev]->key = PM_K_EVENT;
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mbox[dev]->command = event;
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mbox[dev]->parm1 = p1;
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mbox[dev]->parm2 = p2;
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mbox[dev]->parm3 = p3;
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msg_direction[dev] = A_TO_S;
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if ((server_wait_flag[dev].mode & WK_SLEEP)) {
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server_wait_flag[dev].mode = WK_WAKEUP;
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wakeup(server_procs[dev]);
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}
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appl_proc = &chn;
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DO_SLEEP(chn, appl_wait_flag, 0);
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mbox[dev] = NULL;
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msg_direction[dev] = 0;
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}
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splx(flags);
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free(tmp_mbox, M_TEMP);
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return err;
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}
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#endif
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