drivers/media/usb/dvb-usb/dibusb-mb.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/dvb-usb/dibusb-mb.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/dvb-usb/dibusb-mb.c
Extension
.c
Size
14292 bytes
Lines
490
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/* DVB USB compliant linux driver for mobile DVB-T USB devices based on
 * reference designs made by DiBcom (http://www.dibcom.fr/) (DiB3000M-B)
 *
 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
 *
 * based on GPL code from DiBcom, which has
 * Copyright (C) 2004 Amaury Demol for DiBcom
 *
 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
 */
#include "dibusb.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static int dib3000mb_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
	struct dvb_usb_adapter *adap = fe->dvb->priv;
	struct dibusb_state *st = adap->priv;

	return st->ops.tuner_pass_ctrl(fe, enable, st->tuner_addr);
}

static int dibusb_dib3000mb_frontend_attach(struct dvb_usb_adapter *adap)
{
	struct dib3000_config demod_cfg;
	struct dibusb_state *st = adap->priv;

	demod_cfg.demod_address = 0x8;

	adap->fe_adap[0].fe = dvb_attach(dib3000mb_attach, &demod_cfg,
					 &adap->dev->i2c_adap, &st->ops);
	if ((adap->fe_adap[0].fe) == NULL)
		return -ENODEV;

	adap->fe_adap[0].fe->ops.i2c_gate_ctrl = dib3000mb_i2c_gate_ctrl;

	return 0;
}

static int dibusb_thomson_tuner_attach(struct dvb_usb_adapter *adap)
{
	struct dibusb_state *st = adap->priv;

	st->tuner_addr = 0x61;

	dvb_attach(dvb_pll_attach, adap->fe_adap[0].fe, 0x61, &adap->dev->i2c_adap,
		   DVB_PLL_TUA6010XS);
	return 0;
}

static int dibusb_panasonic_tuner_attach(struct dvb_usb_adapter *adap)
{
	struct dibusb_state *st = adap->priv;

	st->tuner_addr = 0x60;

	dvb_attach(dvb_pll_attach, adap->fe_adap[0].fe, 0x60, &adap->dev->i2c_adap,
		   DVB_PLL_TDA665X);
	return 0;
}

/* Some of the Artec 1.1 device aren't equipped with the default tuner
 * (Thomson Cable), but with a Panasonic ENV77H11D5.  This function figures
 * this out. */
static int dibusb_tuner_probe_and_attach(struct dvb_usb_adapter *adap)
{
	u8 b[2] = { 0,0 }, b2[1];
	int ret = 0;
	struct i2c_msg msg[2] = {
		{ .flags = 0,        .buf = b,  .len = 2 },
		{ .flags = I2C_M_RD, .buf = b2, .len = 1 },
	};
	struct dibusb_state *st = adap->priv;

	/* the Panasonic sits on I2C addrass 0x60, the Thomson on 0x61 */
	msg[0].addr = msg[1].addr = st->tuner_addr = 0x60;

	if (adap->fe_adap[0].fe->ops.i2c_gate_ctrl)
		adap->fe_adap[0].fe->ops.i2c_gate_ctrl(adap->fe_adap[0].fe, 1);

	if (i2c_transfer(&adap->dev->i2c_adap, msg, 2) != 2) {
		err("tuner i2c write failed.");
		return -EREMOTEIO;
	}

	if (adap->fe_adap[0].fe->ops.i2c_gate_ctrl)
		adap->fe_adap[0].fe->ops.i2c_gate_ctrl(adap->fe_adap[0].fe, 0);

	if (b2[0] == 0xfe) {

Annotation

Implementation Notes