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);