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