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 (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
12 - Multituner support and i2c address binding
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include <linux/module.h>
31 #include <linux/init.h>
36 #include <media/v4l2-common.h>
38 static unsigned int i2c_debug = 0;
39 module_param(i2c_debug, int, 0644);
40 MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
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");
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.");
51 #define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
52 printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
54 /* ----------------------------------------------------------------------- */
56 static void cx8800_bit_setscl(void *data, int state)
58 struct cx88_core *core = data;
61 core->i2c_state |= 0x02;
63 core->i2c_state &= ~0x02;
64 cx_write(MO_I2C, core->i2c_state);
68 static void cx8800_bit_setsda(void *data, int state)
70 struct cx88_core *core = data;
73 core->i2c_state |= 0x01;
75 core->i2c_state &= ~0x01;
76 cx_write(MO_I2C, core->i2c_state);
80 static int cx8800_bit_getscl(void *data)
82 struct cx88_core *core = data;
85 state = cx_read(MO_I2C);
86 return state & 0x02 ? 1 : 0;
89 static int cx8800_bit_getsda(void *data)
91 struct cx88_core *core = data;
94 state = cx_read(MO_I2C);
98 /* ----------------------------------------------------------------------- */
100 static int attach_inform(struct i2c_client *client)
102 struct tuner_setup tun_setup;
103 struct cx88_core *core = i2c_get_adapdata(client->adapter);
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)
110 if (core->board.radio_type != UNSET) {
111 if ((core->board.radio_addr==ADDR_UNSET)||(core->board.radio_addr==client->addr)) {
112 tun_setup.mode_mask = T_RADIO;
113 tun_setup.type = core->board.radio_type;
114 tun_setup.addr = core->board.radio_addr;
115 tun_setup.tuner_callback = cx88_tuner_callback;
116 client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
119 if (core->board.tuner_type != UNSET) {
120 if ((core->board.tuner_addr==ADDR_UNSET)||(core->board.tuner_addr==client->addr)) {
122 tun_setup.mode_mask = T_ANALOG_TV;
123 tun_setup.type = core->board.tuner_type;
124 tun_setup.addr = core->board.tuner_addr;
125 tun_setup.tuner_callback = cx88_tuner_callback;
126 client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
130 if (core->board.tda9887_conf) {
131 struct v4l2_priv_tun_config tda9887_cfg;
133 tda9887_cfg.tuner = TUNER_TDA9887;
134 tda9887_cfg.priv = &core->board.tda9887_conf;
136 client->driver->command(client, TUNER_SET_CONFIG, &tda9887_cfg);
141 static int detach_inform(struct i2c_client *client)
143 struct cx88_core *core = i2c_get_adapdata(client->adapter);
145 dprintk(1, "i2c detach [client=%s]\n", client->name);
149 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
151 if (0 != core->i2c_rc)
154 #if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
155 if ( (core->dvbdev) && (core->dvbdev->dvb.frontend) ) {
156 if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
157 core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
159 i2c_clients_command(&core->i2c_adap, cmd, arg);
161 if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
162 core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
165 i2c_clients_command(&core->i2c_adap, cmd, arg);
168 static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
169 .setsda = cx8800_bit_setsda,
170 .setscl = cx8800_bit_setscl,
171 .getsda = cx8800_bit_getsda,
172 .getscl = cx8800_bit_getscl,
177 /* ----------------------------------------------------------------------- */
179 static char *i2c_devs[128] = {
180 [ 0x1c >> 1 ] = "lgdt330x",
181 [ 0x86 >> 1 ] = "tda9887/cx22702",
182 [ 0xa0 >> 1 ] = "eeprom",
183 [ 0xc0 >> 1 ] = "tuner (analog)",
184 [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
185 [ 0xc8 >> 1 ] = "xc5000",
188 static void do_i2c_scan(char *name, struct i2c_client *c)
193 for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
195 rc = i2c_master_recv(c,&buf,0);
198 printk("%s: i2c scan: found device @ 0x%x [%s]\n",
199 name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
203 /* init + register i2c algo-bit adapter */
204 int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
206 /* Prevents usage of invalid delay values */
210 memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
211 sizeof(core->i2c_algo));
213 if (core->board.tuner_type != TUNER_ABSENT)
214 core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
215 if (core->board.mpeg & CX88_MPEG_DVB)
216 core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
218 core->i2c_adap.dev.parent = &pci->dev;
219 strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
220 core->i2c_adap.owner = THIS_MODULE;
221 core->i2c_adap.id = I2C_HW_B_CX2388x;
222 core->i2c_adap.client_register = attach_inform;
223 core->i2c_adap.client_unregister = detach_inform;
224 core->i2c_algo.udelay = i2c_udelay;
225 core->i2c_algo.data = core;
226 i2c_set_adapdata(&core->i2c_adap,core);
227 core->i2c_adap.algo_data = &core->i2c_algo;
228 core->i2c_client.adapter = &core->i2c_adap;
229 strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
231 cx8800_bit_setscl(core,1);
232 cx8800_bit_setsda(core,1);
234 core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
235 if (0 == core->i2c_rc) {
236 dprintk(1, "i2c register ok\n");
238 do_i2c_scan(core->name,&core->i2c_client);
240 printk("%s: i2c register FAILED\n", core->name);
244 /* ----------------------------------------------------------------------- */
246 EXPORT_SYMBOL(cx88_call_i2c_clients);