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/* $OpenBSD: dev_sioctl.c,v 1.6 2020/06/28 05:21:39 ratchov Exp $ */
/*
* Copyright (c) 2014-2020 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/time.h>
#include <sys/types.h>
#include <poll.h>
#include <sndio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "abuf.h"
#include "defs.h"
#include "dev.h"
#include "dsp.h"
#include "file.h"
#include "dev_sioctl.h"
#include "utils.h"
void dev_sioctl_ondesc(void *, struct sioctl_desc *, int);
void dev_sioctl_onval(void *, unsigned int, unsigned int);
int dev_sioctl_pollfd(void *, struct pollfd *);
int dev_sioctl_revents(void *, struct pollfd *);
void dev_sioctl_in(void *);
void dev_sioctl_out(void *);
void dev_sioctl_hup(void *);
struct fileops dev_sioctl_ops = {
"sioctl",
dev_sioctl_pollfd,
dev_sioctl_revents,
dev_sioctl_in,
dev_sioctl_out,
dev_sioctl_hup
};
void
dev_sioctl_ondesc(void *arg, struct sioctl_desc *desc, int val)
{
#define GROUP_PREFIX "hw"
char group_buf[CTL_NAMEMAX], *group;
struct dev *d = arg;
int addr;
if (desc == NULL) {
dev_ctlsync(d);
return;
}
addr = CTLADDR_END + desc->addr;
dev_rmctl(d, addr);
/*
* prefix with "hw/" group names of controls we expose, to
* ensure that all controls have unique names when multiple
* sndiod's are chained
*/
if (strcmp(desc->group, "app") == 0 || (desc->group[0] == 0 &&
strcmp(desc->node0.name, "server") == 0)) {
group = group_buf;
if (snprintf(group_buf, CTL_NAMEMAX, GROUP_PREFIX "/%s",
desc->group) >= CTL_NAMEMAX)
return;
} else
group = desc->group;
dev_addctl(d, group, desc->type, addr,
desc->node0.name, desc->node0.unit, desc->func,
desc->node1.name, desc->node1.unit, desc->maxval, val);
}
void
dev_sioctl_onval(void *arg, unsigned int addr, unsigned int val)
{
struct dev *d = arg;
struct ctl *c;
addr += CTLADDR_END;
dev_log(d);
log_puts(": onctl: addr = ");
log_putu(addr);
log_puts(", val = ");
log_putu(val);
log_puts("\n");
for (c = d->ctl_list; c != NULL; c = c->next) {
if (c->addr != addr)
continue;
ctl_log(c);
log_puts(": new value -> ");
log_putu(val);
log_puts("\n");
c->val_mask = ~0U;
c->curval = val;
}
}
/*
* open the control device.
*/
void
dev_sioctl_open(struct dev *d)
{
if (d->sioctl.hdl == NULL) {
/*
* At this point there are clients, for instance if we're
* called by dev_reopen() but the control device couldn't
* be opened. In this case controls have changed (thoseof
* old device are just removed) so we need to notify clients.
*/
dev_ctlsync(d);
return;
}
sioctl_ondesc(d->sioctl.hdl, dev_sioctl_ondesc, d);
sioctl_onval(d->sioctl.hdl, dev_sioctl_onval, d);
}
/*
* close the control device.
*/
void
dev_sioctl_close(struct dev *d)
{
struct ctl *c, **pc;
/* remove controls */
pc = &d->ctl_list;
while ((c = *pc) != NULL) {
if (c->addr >= CTLADDR_END) {
c->refs_mask &= ~CTL_DEVMASK;
if (c->refs_mask == 0) {
*pc = c->next;
xfree(c);
continue;
}
c->type = CTL_NONE;
c->desc_mask = ~0;
}
pc = &c->next;
}
dev_ctlsync(d);
}
int
dev_sioctl_pollfd(void *arg, struct pollfd *pfd)
{
struct dev *d = arg;
struct ctl *c;
int events = 0;
for (c = d->ctl_list; c != NULL; c = c->next) {
if (c->dirty)
events |= POLLOUT;
}
return sioctl_pollfd(d->sioctl.hdl, pfd, events);
}
int
dev_sioctl_revents(void *arg, struct pollfd *pfd)
{
struct dev *d = arg;
return sioctl_revents(d->sioctl.hdl, pfd);
}
void
dev_sioctl_in(void *arg)
{
}
void
dev_sioctl_out(void *arg)
{
struct dev *d = arg;
struct ctl *c;
int cnt;
/*
* for each dirty ctl, call sioctl_setval() and dev_unref(). As
* dev_unref() may destroy the ctl_list, we must call it after
* we've finished iterating on it.
*/
cnt = 0;
for (c = d->ctl_list; c != NULL; c = c->next) {
if (!c->dirty)
continue;
if (!sioctl_setval(d->sioctl.hdl,
c->addr - CTLADDR_END, c->curval)) {
ctl_log(c);
log_puts(": set failed\n");
break;
}
if (log_level >= 2) {
ctl_log(c);
log_puts(": changed\n");
}
c->dirty = 0;
cnt++;
}
while (cnt-- > 0)
dev_unref(d);
}
void
dev_sioctl_hup(void *arg)
{
struct dev *d = arg;
dev_sioctl_close(d);
file_del(d->sioctl.file);
sioctl_close(d->sioctl.hdl);
d->sioctl.hdl = NULL;
}
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