1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
cx88-i2c.c -- all the i2c code is here
Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
& Marcus Metzler (mocm@thp.uni-koeln.de)
(c) 2002 Yurij Sysoev <yurij@naturesoft.net>
(c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
(c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
- Multituner support and i2c address binding
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <asm/io.h>
#include "cx88.h"
#include <media/v4l2-common.h>
static unsigned int i2c_debug;
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
static unsigned int i2c_scan;
module_param(i2c_scan, int, 0444);
MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
static unsigned int i2c_udelay = 5;
module_param(i2c_udelay, int, 0644);
MODULE_PARM_DESC(i2c_udelay, "i2c delay at insmod time, in usecs (should be 5 or higher). Lower value means higher bus speed.");
#define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
/* ----------------------------------------------------------------------- */
static void cx8800_bit_setscl(void *data, int state)
{
struct cx88_core *core = data;
if (state)
core->i2c_state |= 0x02;
else
core->i2c_state &= ~0x02;
cx_write(MO_I2C, core->i2c_state);
cx_read(MO_I2C);
}
static void cx8800_bit_setsda(void *data, int state)
{
struct cx88_core *core = data;
if (state)
core->i2c_state |= 0x01;
else
core->i2c_state &= ~0x01;
cx_write(MO_I2C, core->i2c_state);
cx_read(MO_I2C);
}
static int cx8800_bit_getscl(void *data)
{
struct cx88_core *core = data;
u32 state;
state = cx_read(MO_I2C);
return state & 0x02 ? 1 : 0;
}
static int cx8800_bit_getsda(void *data)
{
struct cx88_core *core = data;
u32 state;
state = cx_read(MO_I2C);
return state & 0x01;
}
/* ----------------------------------------------------------------------- */
static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
.setsda = cx8800_bit_setsda,
.setscl = cx8800_bit_setscl,
.getsda = cx8800_bit_getsda,
.getscl = cx8800_bit_getscl,
.udelay = 16,
.timeout = 200,
};
/* ----------------------------------------------------------------------- */
static const char * const i2c_devs[128] = {
[ 0x1c >> 1 ] = "lgdt330x",
[ 0x86 >> 1 ] = "tda9887/cx22702",
[ 0xa0 >> 1 ] = "eeprom",
[ 0xc0 >> 1 ] = "tuner (analog)",
[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
[ 0xc8 >> 1 ] = "xc5000",
};
static void do_i2c_scan(const char *name, struct i2c_client *c)
{
unsigned char buf;
int i,rc;
for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
c->addr = i;
rc = i2c_master_recv(c,&buf,0);
if (rc < 0)
continue;
printk("%s: i2c scan: found device @ 0x%x [%s]\n",
name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
}
}
/* init + register i2c adapter */
int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
{
/* Prevents usage of invalid delay values */
if (i2c_udelay<5)
i2c_udelay=5;
core->i2c_algo = cx8800_i2c_algo_template;
core->i2c_adap.dev.parent = &pci->dev;
strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
core->i2c_adap.owner = THIS_MODULE;
core->i2c_algo.udelay = i2c_udelay;
core->i2c_algo.data = core;
i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev);
core->i2c_adap.algo_data = &core->i2c_algo;
core->i2c_client.adapter = &core->i2c_adap;
strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
cx8800_bit_setscl(core,1);
cx8800_bit_setsda(core,1);
core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
if (0 == core->i2c_rc) {
static u8 tuner_data[] =
{ 0x0b, 0xdc, 0x86, 0x52 };
static struct i2c_msg tuner_msg =
{ .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 };
dprintk(1, "i2c register ok\n");
switch( core->boardnr ) {
case CX88_BOARD_HAUPPAUGE_HVR1300:
case CX88_BOARD_HAUPPAUGE_HVR3000:
case CX88_BOARD_HAUPPAUGE_HVR4000:
printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n",
core->name);
i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
break;
default:
break;
}
if (i2c_scan)
do_i2c_scan(core->name,&core->i2c_client);
} else
printk("%s: i2c register FAILED\n", core->name);
return core->i2c_rc;
}
|
