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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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dea74869f3
The dvb_frontend_ops is a pointer inside dvb_frontend. That's why every demod-driver is having a field of dvb_frontend_ops in its private-state-struct and using the reference for filling the pointer-field in dvb_frontend. - It saves at least two lines of code per demod-driver, - reduces object size (one less dereference per frontend_ops-access), - be coherent with dvb_tuner_ops, - makes it a little bit easier for newbies to understand how it works and - avoids stupid mistakes because you would have to copy the dvb_frontend_ops always, before you could assign the static pointer directly, which was dangerous. Signed-off-by: Patrick Boettcher <pb@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/* dvb-usb-i2c.c is part of the DVB USB library.
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*
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* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
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* see dvb-usb-init.c for copyright information.
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*
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* This file contains functions for (de-)initializing an I2C adapter.
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*/
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#include "dvb-usb-common.h"
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int dvb_usb_i2c_init(struct dvb_usb_device *d)
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{
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int ret = 0;
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if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
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return 0;
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if (d->props.i2c_algo == NULL) {
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err("no i2c algorithm specified");
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return -EINVAL;
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}
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strncpy(d->i2c_adap.name,d->desc->name,I2C_NAME_SIZE);
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#ifdef I2C_ADAP_CLASS_TV_DIGITAL
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d->i2c_adap.class = I2C_ADAP_CLASS_TV_DIGITAL,
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#else
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d->i2c_adap.class = I2C_CLASS_TV_DIGITAL,
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#endif
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d->i2c_adap.algo = d->props.i2c_algo;
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d->i2c_adap.algo_data = NULL;
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i2c_set_adapdata(&d->i2c_adap, d);
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if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
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err("could not add i2c adapter");
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d->state |= DVB_USB_STATE_I2C;
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return ret;
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}
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int dvb_usb_i2c_exit(struct dvb_usb_device *d)
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{
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if (d->state & DVB_USB_STATE_I2C)
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i2c_del_adapter(&d->i2c_adap);
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d->state &= ~DVB_USB_STATE_I2C;
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return 0;
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}
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int dvb_usb_tuner_init_i2c(struct dvb_frontend *fe)
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{
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struct dvb_usb_device *d = fe->dvb->priv;
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struct i2c_msg msg = { .addr = d->pll_addr, .flags = 0, .buf = d->pll_init, .len = 4 };
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int ret = 0;
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/* if pll_desc is not used */
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if (d->pll_desc == NULL)
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return 0;
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if (d->tuner_pass_ctrl)
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d->tuner_pass_ctrl(fe,1,d->pll_addr);
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deb_pll("pll init: %x\n",d->pll_addr);
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deb_pll("pll-buf: %x %x %x %x\n",d->pll_init[0],d->pll_init[1],
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d->pll_init[2],d->pll_init[3]);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer (&d->i2c_adap, &msg, 1) != 1) {
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err("tuner i2c write failed for pll_init.");
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ret = -EREMOTEIO;
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}
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msleep(1);
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if (d->tuner_pass_ctrl)
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d->tuner_pass_ctrl(fe,0,d->pll_addr);
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return ret;
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}
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EXPORT_SYMBOL(dvb_usb_tuner_init_i2c);
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int dvb_usb_tuner_calc_regs(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep, u8 *b, int buf_len)
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{
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struct dvb_usb_device *d = fe->dvb->priv;
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if (buf_len != 5)
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return -EINVAL;
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if (d->pll_desc == NULL)
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return 0;
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deb_pll("pll addr: %x, freq: %d %p\n",d->pll_addr,fep->frequency,d->pll_desc);
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b[0] = d->pll_addr;
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dvb_pll_configure(d->pll_desc,&b[1],fep->frequency,fep->u.ofdm.bandwidth);
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deb_pll("pll-buf: %x %x %x %x %x\n",b[0],b[1],b[2],b[3],b[4]);
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return 5;
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}
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EXPORT_SYMBOL(dvb_usb_tuner_calc_regs);
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int dvb_usb_tuner_set_params_i2c(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep)
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{
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struct dvb_usb_device *d = fe->dvb->priv;
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int ret = 0;
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u8 b[5];
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struct i2c_msg msg = { .addr = d->pll_addr, .flags = 0, .buf = &b[1], .len = 4 };
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dvb_usb_tuner_calc_regs(fe,fep,b,5);
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if (d->tuner_pass_ctrl)
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d->tuner_pass_ctrl(fe,1,d->pll_addr);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer (&d->i2c_adap, &msg, 1) != 1) {
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err("tuner i2c write failed for pll_set.");
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ret = -EREMOTEIO;
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}
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msleep(1);
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if (d->tuner_pass_ctrl)
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d->tuner_pass_ctrl(fe,0,d->pll_addr);
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return ret;
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}
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EXPORT_SYMBOL(dvb_usb_tuner_set_params_i2c);
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