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, 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
  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);