9f0a8d90d1463885c106b9f8191f012f13f25824
[linux-2.6.git] / drivers / media / dvb / dvb-usb / dvb-usb-i2c.c
1 /* dvb-usb-i2c.c is part of the DVB USB library.
2  *
3  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
4  * see dvb-usb-init.c for copyright information.
5  *
6  * This file contains functions for (de-)initializing an I2C adapter.
7  */
8 #include "dvb-usb-common.h"
9
10 int dvb_usb_i2c_init(struct dvb_usb_device *d)
11 {
12         int ret = 0;
13
14         if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
15                 return 0;
16
17         if (d->props.i2c_algo == NULL) {
18                 err("no i2c algorithm specified");
19                 return -EINVAL;
20         }
21
22         strncpy(d->i2c_adap.name,d->desc->name,I2C_NAME_SIZE);
23 #ifdef I2C_ADAP_CLASS_TV_DIGITAL
24         d->i2c_adap.class = I2C_ADAP_CLASS_TV_DIGITAL,
25 #else
26         d->i2c_adap.class = I2C_CLASS_TV_DIGITAL,
27 #endif
28         d->i2c_adap.algo      = d->props.i2c_algo;
29         d->i2c_adap.algo_data = NULL;
30         d->i2c_adap.id        = I2C_ALGO_BIT;
31
32         i2c_set_adapdata(&d->i2c_adap, d);
33
34         if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
35                 err("could not add i2c adapter");
36
37         d->state |= DVB_USB_STATE_I2C;
38
39         return ret;
40 }
41
42 int dvb_usb_i2c_exit(struct dvb_usb_device *d)
43 {
44         if (d->state & DVB_USB_STATE_I2C)
45                 i2c_del_adapter(&d->i2c_adap);
46         d->state &= ~DVB_USB_STATE_I2C;
47         return 0;
48 }
49
50 int dvb_usb_pll_init_i2c(struct dvb_frontend *fe)
51 {
52         struct dvb_usb_device *d = fe->dvb->priv;
53         struct i2c_msg msg = { .addr = d->pll_addr, .flags = 0, .buf = d->pll_init, .len = 4 };
54         int ret = 0;
55
56         /* if there is nothing to initialize */
57         if (d->pll_init[0] == 0x00 && d->pll_init[1] == 0x00 &&
58                 d->pll_init[2] == 0x00 && d->pll_init[3] == 0x00)
59                 return 0;
60
61         if (d->tuner_pass_ctrl)
62                 d->tuner_pass_ctrl(fe,1,d->pll_addr);
63
64         deb_pll("pll init: %x\n",d->pll_addr);
65         deb_pll("pll-buf: %x %x %x %x\n",d->pll_init[0],d->pll_init[1],
66                         d->pll_init[2],d->pll_init[3]);
67
68         if (i2c_transfer (&d->i2c_adap, &msg, 1) != 1) {
69                 err("tuner i2c write failed for pll_init.");
70                 ret = -EREMOTEIO;
71         }
72         msleep(1);
73
74         if (d->tuner_pass_ctrl)
75                 d->tuner_pass_ctrl(fe,0,d->pll_addr);
76         return ret;
77 }
78 EXPORT_SYMBOL(dvb_usb_pll_init_i2c);
79
80 int dvb_usb_pll_set(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep, u8 b[5])
81 {
82         struct dvb_usb_device *d = fe->dvb->priv;
83
84         deb_pll("pll addr: %x, freq: %d %p\n",d->pll_addr,fep->frequency,d->pll_desc);
85
86         b[0] = d->pll_addr << 1;
87         dvb_pll_configure(d->pll_desc,&b[1],fep->frequency,fep->u.ofdm.bandwidth);
88
89         deb_pll("pll-buf: %x %x %x %x %x\n",b[0],b[1],b[2],b[3],b[4]);
90
91         return 0;
92 }
93 EXPORT_SYMBOL(dvb_usb_pll_set);
94
95 int dvb_usb_pll_set_i2c(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep)
96 {
97         struct dvb_usb_device *d = fe->dvb->priv;
98         int ret = 0;
99         u8 b[5];
100         struct i2c_msg msg = { .addr = d->pll_addr, .flags = 0, .buf = &b[1], .len = 4 };
101
102         dvb_usb_pll_set(fe,fep,b);
103
104         if (d->tuner_pass_ctrl)
105                 d->tuner_pass_ctrl(fe,1,d->pll_addr);
106
107         if (i2c_transfer (&d->i2c_adap, &msg, 1) != 1) {
108                 err("tuner i2c write failed for pll_set.");
109                 ret = -EREMOTEIO;
110         }
111         msleep(1);
112
113         if (d->tuner_pass_ctrl)
114                 d->tuner_pass_ctrl(fe,0,d->pll_addr);
115
116         return ret;
117 }
118 EXPORT_SYMBOL(dvb_usb_pll_set_i2c);