[PATCH] v4l: 739: created make changelog to make easier to generate patches
[linux-2.6] / drivers / media / video / cx88 / cx88-i2c.c
1 /*
2
3     cx88-i2c.c  --  all the i2c code is here
4
5     Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
6                            & Marcus Metzler (mocm@thp.uni-koeln.de)
7     (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
8     (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
9
10     This program is free software; you can redistribute it and/or modify
11     it under the terms of the GNU General Public License as published by
12     the Free Software Foundation; either version 2 of the License, or
13     (at your option) any later version.
14
15     This program is distributed in the hope that it will be useful,
16     but WITHOUT ANY WARRANTY; without even the implied warranty of
17     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18     GNU General Public License for more details.
19
20     You should have received a copy of the GNU General Public License
21     along with this program; if not, write to the Free Software
22     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29
30 #include <asm/io.h>
31
32 #include "cx88.h"
33
34 static unsigned int i2c_debug = 0;
35 module_param(i2c_debug, int, 0644);
36 MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
37
38 static unsigned int i2c_scan = 0;
39 module_param(i2c_scan, int, 0444);
40 MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
41
42 #define dprintk(level,fmt, arg...)      if (i2c_debug >= level) \
43         printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
44
45 /* ----------------------------------------------------------------------- */
46
47 static void cx8800_bit_setscl(void *data, int state)
48 {
49         struct cx88_core *core = data;
50
51         if (state)
52                 core->i2c_state |= 0x02;
53         else
54                 core->i2c_state &= ~0x02;
55         cx_write(MO_I2C, core->i2c_state);
56         cx_read(MO_I2C);
57 }
58
59 static void cx8800_bit_setsda(void *data, int state)
60 {
61         struct cx88_core *core = data;
62
63         if (state)
64                 core->i2c_state |= 0x01;
65         else
66                 core->i2c_state &= ~0x01;
67         cx_write(MO_I2C, core->i2c_state);
68         cx_read(MO_I2C);
69 }
70
71 static int cx8800_bit_getscl(void *data)
72 {
73         struct cx88_core *core = data;
74         u32 state;
75
76         state = cx_read(MO_I2C);
77         return state & 0x02 ? 1 : 0;
78 }
79
80 static int cx8800_bit_getsda(void *data)
81 {
82         struct cx88_core *core = data;
83         u32 state;
84
85         state = cx_read(MO_I2C);
86         return state & 0x01;
87 }
88
89 /* ----------------------------------------------------------------------- */
90
91 static int attach_inform(struct i2c_client *client)
92 {
93         struct tuner_setup tun_setup;
94         struct cx88_core *core = i2c_get_adapdata(client->adapter);
95
96         dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
97                 client->driver->name, client->addr, client->name);
98         if (!client->driver->command)
99                 return 0;
100
101         if (core->radio_type != UNSET) {
102                 if ((core->radio_addr==ADDR_UNSET)||(core->radio_addr==client->addr)) {
103                         tun_setup.mode_mask = T_RADIO;
104                         tun_setup.type = core->radio_type;
105                         tun_setup.addr = core->radio_addr;
106
107                         client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
108                 }
109         }
110         if (core->tuner_type != UNSET) {
111                 if ((core->tuner_addr==ADDR_UNSET)||(core->tuner_addr==client->addr)) {
112
113                         tun_setup.mode_mask = T_ANALOG_TV;
114                         tun_setup.type = core->tuner_type;
115                         tun_setup.addr = core->tuner_addr;
116
117                         client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
118                 }
119         }
120
121         if (core->tda9887_conf)
122                 client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
123         return 0;
124 }
125
126 static int detach_inform(struct i2c_client *client)
127 {
128         struct cx88_core *core = i2c_get_adapdata(client->adapter);
129
130         dprintk(1, "i2c detach [client=%s]\n", client->name);
131         return 0;
132 }
133
134 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
135 {
136         if (0 != core->i2c_rc)
137                 return;
138         i2c_clients_command(&core->i2c_adap, cmd, arg);
139 }
140
141 static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
142         .setsda  = cx8800_bit_setsda,
143         .setscl  = cx8800_bit_setscl,
144         .getsda  = cx8800_bit_getsda,
145         .getscl  = cx8800_bit_getscl,
146         .udelay  = 16,
147         .mdelay  = 10,
148         .timeout = 200,
149 };
150
151 /* ----------------------------------------------------------------------- */
152
153 static struct i2c_adapter cx8800_i2c_adap_template = {
154         .name              = "cx2388x",
155         .owner             = THIS_MODULE,
156         .id                = I2C_HW_B_CX2388x,
157         .client_register   = attach_inform,
158         .client_unregister = detach_inform,
159 };
160
161 static struct i2c_client cx8800_i2c_client_template = {
162         .name   = "cx88xx internal",
163 };
164
165 static char *i2c_devs[128] = {
166         [ 0x1c >> 1 ] = "lgdt330x",
167         [ 0x86 >> 1 ] = "tda9887/cx22702",
168         [ 0xa0 >> 1 ] = "eeprom",
169         [ 0xc0 >> 1 ] = "tuner (analog)",
170         [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
171 };
172
173 static void do_i2c_scan(char *name, struct i2c_client *c)
174 {
175         unsigned char buf;
176         int i,rc;
177
178         for (i = 0; i < 128; i++) {
179                 c->addr = i;
180                 rc = i2c_master_recv(c,&buf,0);
181                 if (rc < 0)
182                         continue;
183                 printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
184                        name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
185         }
186 }
187
188 /* init + register i2c algo-bit adapter */
189 int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
190 {
191         memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
192                sizeof(core->i2c_adap));
193         memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
194                sizeof(core->i2c_algo));
195         memcpy(&core->i2c_client, &cx8800_i2c_client_template,
196                sizeof(core->i2c_client));
197
198         if (core->tuner_type != TUNER_ABSENT)
199                 core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
200         if (cx88_boards[core->board].dvb)
201                 core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
202
203         core->i2c_adap.dev.parent = &pci->dev;
204         strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
205         core->i2c_algo.data = core;
206         i2c_set_adapdata(&core->i2c_adap,core);
207         core->i2c_adap.algo_data = &core->i2c_algo;
208         core->i2c_client.adapter = &core->i2c_adap;
209
210         cx8800_bit_setscl(core,1);
211         cx8800_bit_setsda(core,1);
212
213         core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
214         if (0 == core->i2c_rc) {
215                 dprintk(1, "i2c register ok\n");
216                 if (i2c_scan)
217                         do_i2c_scan(core->name,&core->i2c_client);
218         } else
219                 printk("%s: i2c register FAILED\n", core->name);
220         return core->i2c_rc;
221 }
222
223 /* ----------------------------------------------------------------------- */
224
225 EXPORT_SYMBOL(cx88_call_i2c_clients);
226 EXPORT_SYMBOL(cx88_i2c_init);
227
228 /*
229  * Local variables:
230  * c-basic-offset: 8
231  * End:
232  */