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
10int 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, sizeof(d->i2c_adap.name));
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
42int 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
50int 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}
79EXPORT_SYMBOL(dvb_usb_tuner_init_i2c);
80
81int 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}
99EXPORT_SYMBOL(dvb_usb_tuner_calc_regs);
100
101int 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}
127EXPORT_SYMBOL(dvb_usb_tuner_set_params_i2c);
128