2 $Id: cx88-i2c.c,v 1.23 2005/06/12 04:19:19 mchehab Exp $
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 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/module.h>
28 #include <linux/moduleparam.h>
29 #include <linux/init.h>
35 static unsigned int i2c_debug
= 0;
36 module_param(i2c_debug
, int, 0644);
37 MODULE_PARM_DESC(i2c_debug
,"enable debug messages [i2c]");
39 static unsigned int i2c_scan
= 0;
40 module_param(i2c_scan
, int, 0444);
41 MODULE_PARM_DESC(i2c_scan
,"scan i2c bus at insmod time");
43 #define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
44 printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
46 /* ----------------------------------------------------------------------- */
48 static void cx8800_bit_setscl(void *data
, int state
)
50 struct cx88_core
*core
= data
;
53 core
->i2c_state
|= 0x02;
55 core
->i2c_state
&= ~0x02;
56 cx_write(MO_I2C
, core
->i2c_state
);
60 static void cx8800_bit_setsda(void *data
, int state
)
62 struct cx88_core
*core
= data
;
65 core
->i2c_state
|= 0x01;
67 core
->i2c_state
&= ~0x01;
68 cx_write(MO_I2C
, core
->i2c_state
);
72 static int cx8800_bit_getscl(void *data
)
74 struct cx88_core
*core
= data
;
77 state
= cx_read(MO_I2C
);
78 return state
& 0x02 ? 1 : 0;
81 static int cx8800_bit_getsda(void *data
)
83 struct cx88_core
*core
= data
;
86 state
= cx_read(MO_I2C
);
90 /* ----------------------------------------------------------------------- */
92 static int attach_inform(struct i2c_client
*client
)
94 struct tuner_addr tun_addr
;
95 struct cx88_core
*core
= i2c_get_adapdata(client
->adapter
);
97 dprintk(1, "i2c attach [addr=0x%x,client=%s]\n",
98 client
->addr
, i2c_clientname(client
));
99 if (!client
->driver
->command
)
102 if (core
->radio_type
!= UNSET
) {
103 tun_addr
.v4l2_tuner
= V4L2_TUNER_RADIO
;
104 tun_addr
.type
= core
->radio_type
;
105 tun_addr
.addr
= core
->radio_addr
;
106 client
->driver
->command(client
,TUNER_SET_TYPE_ADDR
, &tun_addr
);
108 if (core
->tuner_type
!= UNSET
) {
109 tun_addr
.v4l2_tuner
= V4L2_TUNER_ANALOG_TV
;
110 tun_addr
.type
= core
->tuner_type
;
111 tun_addr
.addr
= core
->tuner_addr
;
112 client
->driver
->command(client
,TUNER_SET_TYPE_ADDR
, &tun_addr
);
115 if (core
->tda9887_conf
)
116 client
->driver
->command(client
, TDA9887_SET_CONFIG
, &core
->tda9887_conf
);
120 static int detach_inform(struct i2c_client
*client
)
122 struct cx88_core
*core
= i2c_get_adapdata(client
->adapter
);
124 dprintk(1, "i2c detach [client=%s]\n", i2c_clientname(client
));
128 void cx88_call_i2c_clients(struct cx88_core
*core
, unsigned int cmd
, void *arg
)
130 if (0 != core
->i2c_rc
)
132 i2c_clients_command(&core
->i2c_adap
, cmd
, arg
);
135 static struct i2c_algo_bit_data cx8800_i2c_algo_template
= {
136 .setsda
= cx8800_bit_setsda
,
137 .setscl
= cx8800_bit_setscl
,
138 .getsda
= cx8800_bit_getsda
,
139 .getscl
= cx8800_bit_getscl
,
145 /* ----------------------------------------------------------------------- */
147 static struct i2c_adapter cx8800_i2c_adap_template
= {
148 I2C_DEVNAME("cx2388x"),
149 .owner
= THIS_MODULE
,
150 .id
= I2C_HW_B_CX2388x
,
151 .client_register
= attach_inform
,
152 .client_unregister
= detach_inform
,
155 static struct i2c_client cx8800_i2c_client_template
= {
156 I2C_DEVNAME("cx88xx internal"),
159 static char *i2c_devs
[128] = {
160 [ 0x86 >> 1 ] = "tda9887/cx22702",
161 [ 0xa0 >> 1 ] = "eeprom",
162 [ 0xc0 >> 1 ] = "tuner (analog)",
163 [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
166 static void do_i2c_scan(char *name
, struct i2c_client
*c
)
171 for (i
= 0; i
< 128; i
++) {
173 rc
= i2c_master_recv(c
,&buf
,0);
176 printk("%s: i2c scan: found device @ 0x%x [%s]\n",
177 name
, i
<< 1, i2c_devs
[i
] ? i2c_devs
[i
] : "???");
181 /* init + register i2c algo-bit adapter */
182 int cx88_i2c_init(struct cx88_core
*core
, struct pci_dev
*pci
)
184 memcpy(&core
->i2c_adap
, &cx8800_i2c_adap_template
,
185 sizeof(core
->i2c_adap
));
186 memcpy(&core
->i2c_algo
, &cx8800_i2c_algo_template
,
187 sizeof(core
->i2c_algo
));
188 memcpy(&core
->i2c_client
, &cx8800_i2c_client_template
,
189 sizeof(core
->i2c_client
));
191 if (core
->tuner_type
!= TUNER_ABSENT
)
192 core
->i2c_adap
.class |= I2C_CLASS_TV_ANALOG
;
193 if (cx88_boards
[core
->board
].dvb
)
194 core
->i2c_adap
.class |= I2C_CLASS_TV_DIGITAL
;
196 core
->i2c_adap
.dev
.parent
= &pci
->dev
;
197 strlcpy(core
->i2c_adap
.name
,core
->name
,sizeof(core
->i2c_adap
.name
));
198 core
->i2c_algo
.data
= core
;
199 i2c_set_adapdata(&core
->i2c_adap
,core
);
200 core
->i2c_adap
.algo_data
= &core
->i2c_algo
;
201 core
->i2c_client
.adapter
= &core
->i2c_adap
;
203 cx8800_bit_setscl(core
,1);
204 cx8800_bit_setsda(core
,1);
206 core
->i2c_rc
= i2c_bit_add_bus(&core
->i2c_adap
);
207 if (0 == core
->i2c_rc
) {
208 dprintk(1, "i2c register ok\n");
210 do_i2c_scan(core
->name
,&core
->i2c_client
);
212 printk("%s: i2c register FAILED\n", core
->name
);
216 /* ----------------------------------------------------------------------- */
218 EXPORT_SYMBOL(cx88_call_i2c_clients
);
219 EXPORT_SYMBOL(cx88_i2c_init
);