Annotation of src/usr.bin/sndiod/dev_sioctl.c, Revision 1.3
1.3 ! ratchov 1: /* $OpenBSD: dev_sioctl.c,v 1.2 2020/03/08 14:52:20 ratchov Exp $ */
1.1 ratchov 2: /*
3: * Copyright (c) 2014-2020 Alexandre Ratchov <alex@caoua.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #include <sys/time.h>
18: #include <sys/types.h>
19:
20: #include <poll.h>
21: #include <sndio.h>
22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25: #include "abuf.h"
26: #include "defs.h"
27: #include "dev.h"
28: #include "dsp.h"
29: #include "file.h"
30: #include "dev_sioctl.h"
31: #include "utils.h"
32:
33: void dev_sioctl_ondesc(void *, struct sioctl_desc *, int);
34: void dev_sioctl_onval(void *, unsigned int, unsigned int);
35: int dev_sioctl_pollfd(void *, struct pollfd *);
36: int dev_sioctl_revents(void *, struct pollfd *);
37: void dev_sioctl_in(void *);
38: void dev_sioctl_out(void *);
39: void dev_sioctl_hup(void *);
40:
41: struct fileops dev_sioctl_ops = {
42: "sioctl",
43: dev_sioctl_pollfd,
44: dev_sioctl_revents,
45: dev_sioctl_in,
46: dev_sioctl_out,
47: dev_sioctl_hup
48: };
49:
50: void
51: dev_sioctl_ondesc(void *arg, struct sioctl_desc *desc, int val)
52: {
53: #define GROUP_PREFIX "hw"
54: char group_buf[CTL_NAMEMAX], *group;
55: struct dev *d = arg;
56: int addr;
57:
1.2 ratchov 58: if (desc == NULL) {
59: dev_ctlsync(d);
1.1 ratchov 60: return;
1.2 ratchov 61: }
62:
1.1 ratchov 63: addr = CTLADDR_END + desc->addr;
64: dev_rmctl(d, addr);
65:
66: /*
67: * prefix group names we use (top-level and "app") with "hw."
68: * to ensure that all controls have unique names when multiple
69: * sndiod's are chained
70: */
71: if (desc->group[0] == 0)
72: group = GROUP_PREFIX;
73: else {
74: group = group_buf;
75: if (snprintf(group_buf, CTL_NAMEMAX, GROUP_PREFIX "/%s",
76: desc->group) >= CTL_NAMEMAX)
77: return;
78: }
79:
80: dev_addctl(d, group, desc->type, addr,
81: desc->node0.name, desc->node0.unit, desc->func,
82: desc->node1.name, desc->node1.unit, desc->maxval, val);
83: }
84:
85: void
86: dev_sioctl_onval(void *arg, unsigned int addr, unsigned int val)
87: {
88: struct dev *d = arg;
89: struct ctl *c;
90:
91: addr += CTLADDR_END;
92:
93: dev_log(d);
94: log_puts(": onctl: addr = ");
95: log_putu(addr);
96: log_puts(", val = ");
97: log_putu(val);
98: log_puts("\n");
99:
100: for (c = d->ctl_list; c != NULL; c = c->next) {
101: if (c->addr != addr)
102: continue;
103: ctl_log(c);
104: log_puts(": new value -> ");
105: log_putu(val);
106: log_puts("\n");
107: c->val_mask = ~0U;
108: c->curval = val;
109: }
110: }
111:
112: /*
113: * open the control device.
114: */
115: void
116: dev_sioctl_open(struct dev *d)
117: {
1.3 ! ratchov 118: if (d->sioctl.hdl == NULL) {
! 119: /*
! 120: * At this point there are clients, for instance if we're
! 121: * called by dev_reopen() but the control device couldn't
! 122: * be opened. In this case controls have changed (thoseof
! 123: * old device are just removed) so we need to notify clients.
! 124: */
! 125: dev_ctlsync(d);
1.1 ratchov 126: return;
1.3 ! ratchov 127: }
1.1 ratchov 128: sioctl_ondesc(d->sioctl.hdl, dev_sioctl_ondesc, d);
129: sioctl_onval(d->sioctl.hdl, dev_sioctl_onval, d);
130: d->sioctl.file = file_new(&dev_sioctl_ops, d, "mix",
131: sioctl_nfds(d->sioctl.hdl));
132: }
133:
134: /*
135: * close the control device.
136: */
137: void
138: dev_sioctl_close(struct dev *d)
139: {
140: if (d->sioctl.hdl == NULL)
141: return;
142: file_del(d->sioctl.file);
143: }
144:
145: int
146: dev_sioctl_pollfd(void *arg, struct pollfd *pfd)
147: {
148: struct dev *d = arg;
149: struct ctl *c;
150: int events = 0;
151:
152: for (c = d->ctl_list; c != NULL; c = c->next) {
153: if (c->dirty)
154: events |= POLLOUT;
155: }
156: return sioctl_pollfd(d->sioctl.hdl, pfd, events);
157: }
158:
159: int
160: dev_sioctl_revents(void *arg, struct pollfd *pfd)
161: {
162: struct dev *d = arg;
163:
164: return sioctl_revents(d->sioctl.hdl, pfd);
165: }
166:
167: void
168: dev_sioctl_in(void *arg)
169: {
170: }
171:
172: void
173: dev_sioctl_out(void *arg)
174: {
175: struct dev *d = arg;
176: struct ctl *c;
177: int cnt;
178:
179: /*
180: * for each dirty ctl, call sioctl_setval() and dev_unref(). As
181: * dev_unref() may destroy the ctl_list, we must call it after
182: * we've finished iterating on it.
183: */
184: cnt = 0;
185: for (c = d->ctl_list; c != NULL; c = c->next) {
186: if (!c->dirty)
187: continue;
188: if (!sioctl_setval(d->sioctl.hdl,
189: c->addr - CTLADDR_END, c->curval)) {
190: ctl_log(c);
191: log_puts(": set failed\n");
192: break;
193: }
194: if (log_level >= 2) {
195: ctl_log(c);
196: log_puts(": changed\n");
197: }
198: c->dirty = 0;
199: cnt++;
200: }
201: while (cnt-- > 0)
202: dev_unref(d);
203: }
204:
205: void
206: dev_sioctl_hup(void *arg)
207: {
208: struct dev *d = arg;
209:
210: dev_sioctl_close(d);
211: }
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