1 /*
2 * Copyright (c) 2003, 2004
3 * John Wehle <john@feith.com>. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by John Wehle.
16 * 4. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
28 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Infrared remote routines for the Conexant MPEG-2 Codec driver.
34 *
35 * Ideally these routines should be implemented as a separate
36 * driver which has a generic infrared remote interface so that
37 * it's not necessary for each multimedia driver to re-invent
38 * the wheel.
39 */
40
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/conf.h>
45 #include <sys/uio.h>
46 #include <sys/kernel.h>
47 #include <sys/poll.h>
48 #include <sys/select.h>
49 #include <sys/resource.h>
50 #include <sys/bus.h>
51 #include <sys/rman.h>
52
53 #include <machine/clock.h>
54
55 #include <dev/video/cxm/cxm.h>
56
57 #include <bus/iicbus/iiconf.h>
58 #include <bus/iicbus/iicbus.h>
59
60 #include "iicbb_if.h"
61
62
63 static int
cxm_ir_read(device_t iicbus,int i2c_addr,char * buf,int len)64 cxm_ir_read(device_t iicbus, int i2c_addr, char *buf, int len)
65 {
66 int received;
67
68 if (iicbus_start(iicbus, i2c_addr + 1, CXM_I2C_TIMEOUT) != 0)
69 return -1;
70
71 if (iicbus_read(iicbus, buf, len, &received, IIC_LAST_READ, 0) != 0)
72 goto fail;
73
74 iicbus_stop(iicbus);
75
76 return received;
77
78 fail:
79 iicbus_stop(iicbus);
80 return -1;
81 }
82
83
84 int
cxm_ir_init(struct cxm_softc * sc)85 cxm_ir_init(struct cxm_softc *sc)
86 {
87 unsigned char key[1];
88
89 if (cxm_ir_read(sc->iicbus, CXM_I2C_IR,
90 key, sizeof(key)) != sizeof(key))
91 return -1;
92
93 device_printf(sc->dev, "IR Remote\n");
94
95 return 0;
96 }
97
98
99 int
cxm_ir_key(struct cxm_softc * sc,char * buf,int len)100 cxm_ir_key(struct cxm_softc *sc, char *buf, int len)
101 {
102 int result;
103
104 result = cxm_ir_read(sc->iicbus, CXM_I2C_IR, buf, len);
105
106 if (result >= 0)
107 return result;
108
109 /*
110 * If the IR receiver didn't respond,
111 * then wait 50 ms and try again.
112 */
113
114 tsleep(&sc->iicbus, 0, "IR", hz / 20);
115
116 return cxm_ir_read(sc->iicbus, CXM_I2C_IR, buf, len);
117 }
118