Merge master.kernel.org:/pub/scm/linux/kernel/git/tglx/mtd-2.6
[linux-2.6] / drivers / media / video / cx88 / cx88-i2c.c
1 /*
2     $Id: cx88-i2c.c,v 1.24 2005/06/17 18:46:23 mkrufky Exp $
3
4     cx88-i2c.c  --  all the i2c code is here
5
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>
10
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.
15
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.
20
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.
24
25 */
26
27 #include <linux/module.h>
28 #include <linux/moduleparam.h>
29 #include <linux/init.h>
30
31 #include <asm/io.h>
32
33 #include "cx88.h"
34
35 static unsigned int i2c_debug = 0;
36 module_param(i2c_debug, int, 0644);
37 MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
38
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");
42
43 #define dprintk(level,fmt, arg...)      if (i2c_debug >= level) \
44         printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
45
46 /* ----------------------------------------------------------------------- */
47
48 static void cx8800_bit_setscl(void *data, int state)
49 {
50         struct cx88_core *core = data;
51
52         if (state)
53                 core->i2c_state |= 0x02;
54         else
55                 core->i2c_state &= ~0x02;
56         cx_write(MO_I2C, core->i2c_state);
57         cx_read(MO_I2C);
58 }
59
60 static void cx8800_bit_setsda(void *data, int state)
61 {
62         struct cx88_core *core = data;
63
64         if (state)
65                 core->i2c_state |= 0x01;
66         else
67                 core->i2c_state &= ~0x01;
68         cx_write(MO_I2C, core->i2c_state);
69         cx_read(MO_I2C);
70 }
71
72 static int cx8800_bit_getscl(void *data)
73 {
74         struct cx88_core *core = data;
75         u32 state;
76
77         state = cx_read(MO_I2C);
78         return state & 0x02 ? 1 : 0;
79 }
80
81 static int cx8800_bit_getsda(void *data)
82 {
83         struct cx88_core *core = data;
84         u32 state;
85
86         state = cx_read(MO_I2C);
87         return state & 0x01;
88 }
89
90 /* ----------------------------------------------------------------------- */
91
92 static int attach_inform(struct i2c_client *client)
93 {
94         struct tuner_addr tun_addr;
95         struct cx88_core *core = i2c_get_adapdata(client->adapter);
96
97         dprintk(1, "i2c attach [addr=0x%x,client=%s]\n",
98                 client->addr, i2c_clientname(client));
99         if (!client->driver->command)
100                 return 0;
101
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);
107         }
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);
113         }
114
115         if (core->tda9887_conf)
116                 client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
117         return 0;
118 }
119
120 static int detach_inform(struct i2c_client *client)
121 {
122         struct cx88_core *core = i2c_get_adapdata(client->adapter);
123
124         dprintk(1, "i2c detach [client=%s]\n", i2c_clientname(client));
125         return 0;
126 }
127
128 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
129 {
130         if (0 != core->i2c_rc)
131                 return;
132         i2c_clients_command(&core->i2c_adap, cmd, arg);
133 }
134
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,
140         .udelay  = 16,
141         .mdelay  = 10,
142         .timeout = 200,
143 };
144
145 /* ----------------------------------------------------------------------- */
146
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,
153 };
154
155 static struct i2c_client cx8800_i2c_client_template = {
156         I2C_DEVNAME("cx88xx internal"),
157 };
158
159 static char *i2c_devs[128] = {
160         [ 0x1c >> 1 ] = "lgdt3302",
161         [ 0x86 >> 1 ] = "tda9887/cx22702",
162         [ 0xa0 >> 1 ] = "eeprom",
163         [ 0xc0 >> 1 ] = "tuner (analog)",
164         [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
165 };
166
167 static void do_i2c_scan(char *name, struct i2c_client *c)
168 {
169         unsigned char buf;
170         int i,rc;
171
172         for (i = 0; i < 128; i++) {
173                 c->addr = i;
174                 rc = i2c_master_recv(c,&buf,0);
175                 if (rc < 0)
176                         continue;
177                 printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
178                        name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
179         }
180 }
181
182 /* init + register i2c algo-bit adapter */
183 int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
184 {
185         memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
186                sizeof(core->i2c_adap));
187         memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
188                sizeof(core->i2c_algo));
189         memcpy(&core->i2c_client, &cx8800_i2c_client_template,
190                sizeof(core->i2c_client));
191
192         if (core->tuner_type != TUNER_ABSENT)
193                 core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
194         if (cx88_boards[core->board].dvb)
195                 core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
196
197         core->i2c_adap.dev.parent = &pci->dev;
198         strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
199         core->i2c_algo.data = core;
200         i2c_set_adapdata(&core->i2c_adap,core);
201         core->i2c_adap.algo_data = &core->i2c_algo;
202         core->i2c_client.adapter = &core->i2c_adap;
203
204         cx8800_bit_setscl(core,1);
205         cx8800_bit_setsda(core,1);
206
207         core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
208         if (0 == core->i2c_rc) {
209                 dprintk(1, "i2c register ok\n");
210                 if (i2c_scan)
211                         do_i2c_scan(core->name,&core->i2c_client);
212         } else
213                 printk("%s: i2c register FAILED\n", core->name);
214         return core->i2c_rc;
215 }
216
217 /* ----------------------------------------------------------------------- */
218
219 EXPORT_SYMBOL(cx88_call_i2c_clients);
220 EXPORT_SYMBOL(cx88_i2c_init);
221
222 /*
223  * Local variables:
224  * c-basic-offset: 8
225  * End:
226  */