Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[linux-2.6.git] / 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     (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
11         - Multituner support and i2c address binding
12
13     This program is free software; you can redistribute it and/or modify
14     it under the terms of the GNU General Public License as published by
15     the Free Software Foundation; either version 2 of the License, or
16     (at your option) any later version.
17
18     This program is distributed in the hope that it will be useful,
19     but WITHOUT ANY WARRANTY; without even the implied warranty of
20     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21     GNU General Public License for more details.
22
23     You should have received a copy of the GNU General Public License
24     along with this program; if not, write to the Free Software
25     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26
27 */
28
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/init.h>
32
33 #include <asm/io.h>
34
35 #include "cx88.h"
36 #include <media/v4l2-common.h>
37
38 static unsigned int i2c_debug = 0;
39 module_param(i2c_debug, int, 0644);
40 MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
41
42 static unsigned int i2c_scan = 0;
43 module_param(i2c_scan, int, 0444);
44 MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
45
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.");
50
51 #define dprintk(level,fmt, arg...)      if (i2c_debug >= level) \
52         printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
53
54 /* ----------------------------------------------------------------------- */
55
56 static void cx8800_bit_setscl(void *data, int state)
57 {
58         struct cx88_core *core = data;
59
60         if (state)
61                 core->i2c_state |= 0x02;
62         else
63                 core->i2c_state &= ~0x02;
64         cx_write(MO_I2C, core->i2c_state);
65         cx_read(MO_I2C);
66 }
67
68 static void cx8800_bit_setsda(void *data, int state)
69 {
70         struct cx88_core *core = data;
71
72         if (state)
73                 core->i2c_state |= 0x01;
74         else
75                 core->i2c_state &= ~0x01;
76         cx_write(MO_I2C, core->i2c_state);
77         cx_read(MO_I2C);
78 }
79
80 static int cx8800_bit_getscl(void *data)
81 {
82         struct cx88_core *core = data;
83         u32 state;
84
85         state = cx_read(MO_I2C);
86         return state & 0x02 ? 1 : 0;
87 }
88
89 static int cx8800_bit_getsda(void *data)
90 {
91         struct cx88_core *core = data;
92         u32 state;
93
94         state = cx_read(MO_I2C);
95         return state & 0x01;
96 }
97
98 /* ----------------------------------------------------------------------- */
99
100 static int attach_inform(struct i2c_client *client)
101 {
102         struct tuner_setup tun_setup;
103         struct cx88_core *core = i2c_get_adapdata(client->adapter);
104
105         dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
106                 client->driver->driver.name, client->addr, client->name);
107         if (!client->driver->command)
108                 return 0;
109
110         if (core->radio_type != UNSET) {
111                 if ((core->radio_addr==ADDR_UNSET)||(core->radio_addr==client->addr)) {
112                         tun_setup.mode_mask = T_RADIO;
113                         tun_setup.type = core->radio_type;
114                         tun_setup.addr = core->radio_addr;
115
116                         client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
117                 }
118         }
119         if (core->tuner_type != UNSET) {
120                 if ((core->tuner_addr==ADDR_UNSET)||(core->tuner_addr==client->addr)) {
121
122                         tun_setup.mode_mask = T_ANALOG_TV;
123                         tun_setup.type = core->tuner_type;
124                         tun_setup.addr = core->tuner_addr;
125
126                         client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
127                 }
128         }
129
130         if (core->tda9887_conf)
131                 client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
132         return 0;
133 }
134
135 static int detach_inform(struct i2c_client *client)
136 {
137         struct cx88_core *core = i2c_get_adapdata(client->adapter);
138
139         dprintk(1, "i2c detach [client=%s]\n", client->name);
140         return 0;
141 }
142
143 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
144 {
145         if (0 != core->i2c_rc)
146                 return;
147
148         if (core->dvbdev) {
149                 if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
150                         core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
151
152                 i2c_clients_command(&core->i2c_adap, cmd, arg);
153
154                 if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
155                         core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
156         } else
157                 i2c_clients_command(&core->i2c_adap, cmd, arg);
158 }
159
160 static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
161         .setsda  = cx8800_bit_setsda,
162         .setscl  = cx8800_bit_setscl,
163         .getsda  = cx8800_bit_getsda,
164         .getscl  = cx8800_bit_getscl,
165         .udelay  = 16,
166         .timeout = 200,
167 };
168
169 /* ----------------------------------------------------------------------- */
170
171 static struct i2c_adapter cx8800_i2c_adap_template = {
172         .name              = "cx2388x",
173         .owner             = THIS_MODULE,
174         .id                = I2C_HW_B_CX2388x,
175         .client_register   = attach_inform,
176         .client_unregister = detach_inform,
177 };
178
179 static struct i2c_client cx8800_i2c_client_template = {
180         .name   = "cx88xx internal",
181 };
182
183 static char *i2c_devs[128] = {
184         [ 0x1c >> 1 ] = "lgdt330x",
185         [ 0x86 >> 1 ] = "tda9887/cx22702",
186         [ 0xa0 >> 1 ] = "eeprom",
187         [ 0xc0 >> 1 ] = "tuner (analog)",
188         [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
189 };
190
191 static void do_i2c_scan(char *name, struct i2c_client *c)
192 {
193         unsigned char buf;
194         int i,rc;
195
196         for (i = 0; i < 128; i++) {
197                 c->addr = i;
198                 rc = i2c_master_recv(c,&buf,0);
199                 if (rc < 0)
200                         continue;
201                 printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
202                        name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
203         }
204 }
205
206 /* init + register i2c algo-bit adapter */
207 int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
208 {
209         /* Prevents usage of invalid delay values */
210         if (i2c_udelay<5)
211                 i2c_udelay=5;
212         cx8800_i2c_algo_template.udelay=i2c_udelay;
213
214         memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
215                sizeof(core->i2c_adap));
216         memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
217                sizeof(core->i2c_algo));
218         memcpy(&core->i2c_client, &cx8800_i2c_client_template,
219                sizeof(core->i2c_client));
220
221         if (core->tuner_type != TUNER_ABSENT)
222                 core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
223         if (cx88_boards[core->board].dvb)
224                 core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
225
226         core->i2c_adap.dev.parent = &pci->dev;
227         strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
228         core->i2c_algo.data = core;
229         i2c_set_adapdata(&core->i2c_adap,core);
230         core->i2c_adap.algo_data = &core->i2c_algo;
231         core->i2c_client.adapter = &core->i2c_adap;
232
233         cx8800_bit_setscl(core,1);
234         cx8800_bit_setsda(core,1);
235
236         core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
237         if (0 == core->i2c_rc) {
238                 dprintk(1, "i2c register ok\n");
239                 if (i2c_scan)
240                         do_i2c_scan(core->name,&core->i2c_client);
241         } else
242                 printk("%s: i2c register FAILED\n", core->name);
243         return core->i2c_rc;
244 }
245
246 /* ----------------------------------------------------------------------- */
247
248 EXPORT_SYMBOL(cx88_call_i2c_clients);
249
250 /*
251  * Local variables:
252  * c-basic-offset: 8
253  * End:
254  */