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1da177e4 LT |
1 | /* |
2 | $Id: cx88-i2c.c,v 1.20 2005/02/15 15:59:35 kraxel 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 | 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 | 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 cx88_core *core = i2c_get_adapdata(client->adapter); | |
95 | ||
96 | dprintk(1, "i2c attach [addr=0x%x,client=%s]\n", | |
97 | client->addr, i2c_clientname(client)); | |
98 | if (!client->driver->command) | |
99 | return 0; | |
100 | ||
101 | if (core->tuner_type != UNSET) | |
102 | client->driver->command(client, TUNER_SET_TYPE, &core->tuner_type); | |
103 | if (core->tda9887_conf) | |
104 | client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int detach_inform(struct i2c_client *client) | |
109 | { | |
110 | struct cx88_core *core = i2c_get_adapdata(client->adapter); | |
111 | ||
112 | dprintk(1, "i2c detach [client=%s]\n", i2c_clientname(client)); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg) | |
117 | { | |
118 | if (0 != core->i2c_rc) | |
119 | return; | |
120 | i2c_clients_command(&core->i2c_adap, cmd, arg); | |
121 | } | |
122 | ||
123 | static struct i2c_algo_bit_data cx8800_i2c_algo_template = { | |
124 | .setsda = cx8800_bit_setsda, | |
125 | .setscl = cx8800_bit_setscl, | |
126 | .getsda = cx8800_bit_getsda, | |
127 | .getscl = cx8800_bit_getscl, | |
128 | .udelay = 16, | |
129 | .mdelay = 10, | |
130 | .timeout = 200, | |
131 | }; | |
132 | ||
133 | /* ----------------------------------------------------------------------- */ | |
134 | ||
135 | static struct i2c_adapter cx8800_i2c_adap_template = { | |
136 | I2C_DEVNAME("cx2388x"), | |
137 | .owner = THIS_MODULE, | |
138 | .id = I2C_HW_B_CX2388x, | |
139 | .client_register = attach_inform, | |
140 | .client_unregister = detach_inform, | |
141 | }; | |
142 | ||
143 | static struct i2c_client cx8800_i2c_client_template = { | |
144 | I2C_DEVNAME("cx88xx internal"), | |
145 | }; | |
146 | ||
147 | static char *i2c_devs[128] = { | |
148 | [ 0x86 >> 1 ] = "tda9887/cx22702", | |
149 | [ 0xa0 >> 1 ] = "eeprom", | |
150 | [ 0xc0 >> 1 ] = "tuner (analog)", | |
151 | [ 0xc2 >> 1 ] = "tuner (analog/dvb)", | |
152 | }; | |
153 | ||
154 | static void do_i2c_scan(char *name, struct i2c_client *c) | |
155 | { | |
156 | unsigned char buf; | |
157 | int i,rc; | |
158 | ||
159 | for (i = 0; i < 128; i++) { | |
160 | c->addr = i; | |
161 | rc = i2c_master_recv(c,&buf,0); | |
162 | if (rc < 0) | |
163 | continue; | |
164 | printk("%s: i2c scan: found device @ 0x%x [%s]\n", | |
165 | name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); | |
166 | } | |
167 | } | |
168 | ||
169 | /* init + register i2c algo-bit adapter */ | |
170 | int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci) | |
171 | { | |
172 | memcpy(&core->i2c_adap, &cx8800_i2c_adap_template, | |
173 | sizeof(core->i2c_adap)); | |
174 | memcpy(&core->i2c_algo, &cx8800_i2c_algo_template, | |
175 | sizeof(core->i2c_algo)); | |
176 | memcpy(&core->i2c_client, &cx8800_i2c_client_template, | |
177 | sizeof(core->i2c_client)); | |
178 | ||
179 | if (core->tuner_type != TUNER_ABSENT) | |
180 | core->i2c_adap.class |= I2C_CLASS_TV_ANALOG; | |
181 | if (cx88_boards[core->board].dvb) | |
182 | core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL; | |
183 | ||
184 | core->i2c_adap.dev.parent = &pci->dev; | |
185 | strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name)); | |
186 | core->i2c_algo.data = core; | |
187 | i2c_set_adapdata(&core->i2c_adap,core); | |
188 | core->i2c_adap.algo_data = &core->i2c_algo; | |
189 | core->i2c_client.adapter = &core->i2c_adap; | |
190 | ||
191 | cx8800_bit_setscl(core,1); | |
192 | cx8800_bit_setsda(core,1); | |
193 | ||
194 | core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap); | |
195 | if (0 == core->i2c_rc) { | |
196 | dprintk(1, "i2c register ok\n"); | |
197 | if (i2c_scan) | |
198 | do_i2c_scan(core->name,&core->i2c_client); | |
199 | } else | |
200 | printk("%s: i2c register FAILED\n", core->name); | |
201 | return core->i2c_rc; | |
202 | } | |
203 | ||
204 | /* ----------------------------------------------------------------------- */ | |
205 | ||
206 | EXPORT_SYMBOL(cx88_call_i2c_clients); | |
207 | EXPORT_SYMBOL(cx88_i2c_init); | |
208 | ||
209 | /* | |
210 | * Local variables: | |
211 | * c-basic-offset: 8 | |
212 | * End: | |
213 | */ |