Merge branch 'for-linus' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[linux-2.6] / 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) 2004-6 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.dev.parent = &d->udev->dev;
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_tuner_init_i2c(struct dvb_frontend *fe)
51 {
52         struct dvb_usb_adapter *adap = fe->dvb->priv;
53         struct i2c_msg msg = { .addr = adap->pll_addr, .flags = 0, .buf = adap->pll_init, .len = 4 };
54         int ret = 0;
55
56         /* if pll_desc is not used */
57         if (adap->pll_desc == NULL)
58                 return 0;
59
60         if (adap->tuner_pass_ctrl)
61                 adap->tuner_pass_ctrl(fe, 1, adap->pll_addr);
62
63         deb_pll("pll init: %x\n",adap->pll_addr);
64         deb_pll("pll-buf: %x %x %x %x\n",adap->pll_init[0], adap->pll_init[1],
65                         adap->pll_init[2], adap->pll_init[3]);
66
67         if (fe->ops.i2c_gate_ctrl)
68                 fe->ops.i2c_gate_ctrl(fe, 1);
69         if (i2c_transfer (&adap->dev->i2c_adap, &msg, 1) != 1) {
70                 err("tuner i2c write failed for pll_init.");
71                 ret = -EREMOTEIO;
72         }
73         msleep(1);
74
75         if (adap->tuner_pass_ctrl)
76                 adap->tuner_pass_ctrl(fe,0,adap->pll_addr);
77         return ret;
78 }
79 EXPORT_SYMBOL(dvb_usb_tuner_init_i2c);
80
81 int dvb_usb_tuner_calc_regs(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep, u8 *b, int buf_len)
82 {
83         struct dvb_usb_adapter *adap = fe->dvb->priv;
84
85         if (buf_len != 5)
86                 return -EINVAL;
87         if (adap->pll_desc == NULL)
88                 return 0;
89
90         deb_pll("pll addr: %x, freq: %d %p\n",adap->pll_addr, fep->frequency, adap->pll_desc);
91
92         b[0] = adap->pll_addr;
93         dvb_pll_configure(adap->pll_desc, &b[1], fep->frequency, fep->u.ofdm.bandwidth);
94
95         deb_pll("pll-buf: %x %x %x %x %x\n",b[0],b[1],b[2],b[3],b[4]);
96
97         return 5;
98 }
99 EXPORT_SYMBOL(dvb_usb_tuner_calc_regs);
100
101 int dvb_usb_tuner_set_params_i2c(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep)
102 {
103         struct dvb_usb_adapter *adap = fe->dvb->priv;
104         int ret = 0;
105         u8 b[5];
106         struct i2c_msg msg = { .addr = adap->pll_addr, .flags = 0, .buf = &b[1], .len = 4 };
107
108         dvb_usb_tuner_calc_regs(fe,fep,b,5);
109
110         if (adap->tuner_pass_ctrl)
111                 adap->tuner_pass_ctrl(fe, 1, adap->pll_addr);
112
113         if (fe->ops.i2c_gate_ctrl)
114                 fe->ops.i2c_gate_ctrl(fe, 1);
115
116         if (i2c_transfer(&adap->dev->i2c_adap, &msg, 1) != 1) {
117                 err("tuner i2c write failed for pll_set.");
118                 ret = -EREMOTEIO;
119         }
120         msleep(1);
121
122         if (adap->tuner_pass_ctrl)
123                 adap->tuner_pass_ctrl(fe, 0, adap->pll_addr);
124
125         return ret;
126 }
127 EXPORT_SYMBOL(dvb_usb_tuner_set_params_i2c);