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