drivers/media/firewire/firedtv-fe.c

Source file repositories/reference/linux-study-clean/drivers/media/firewire/firedtv-fe.c

File Facts

System
Linux kernel
Corpus path
drivers/media/firewire/firedtv-fe.c
Extension
.c
Size
5858 bytes
Lines
251
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-or-later
/*
 * FireDTV driver (formerly known as FireSAT)
 *
 * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
 * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
 */

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>

#include <media/dvb_frontend.h>

#include "firedtv.h"

static int fdtv_dvb_init(struct dvb_frontend *fe)
{
	struct firedtv *fdtv = fe->sec_priv;
	int err;

	/* FIXME - allocate free channel at IRM */
	fdtv->isochannel = fdtv->adapter.num;

	err = cmp_establish_pp_connection(fdtv, fdtv->subunit,
					  fdtv->isochannel);
	if (err) {
		dev_err(fdtv->device,
			"could not establish point to point connection\n");
		return err;
	}

	return fdtv_start_iso(fdtv);
}

static int fdtv_sleep(struct dvb_frontend *fe)
{
	struct firedtv *fdtv = fe->sec_priv;

	fdtv_stop_iso(fdtv);
	cmp_break_pp_connection(fdtv, fdtv->subunit, fdtv->isochannel);
	fdtv->isochannel = -1;
	return 0;
}

#define LNBCONTROL_DONTCARE 0xff

static int fdtv_diseqc_send_master_cmd(struct dvb_frontend *fe,
				       struct dvb_diseqc_master_cmd *cmd)
{
	struct firedtv *fdtv = fe->sec_priv;

	return avc_lnb_control(fdtv, LNBCONTROL_DONTCARE, LNBCONTROL_DONTCARE,
			       LNBCONTROL_DONTCARE, 1, cmd);
}

static int fdtv_diseqc_send_burst(struct dvb_frontend *fe,
				  enum fe_sec_mini_cmd minicmd)
{
	return 0;
}

static int fdtv_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
{
	struct firedtv *fdtv = fe->sec_priv;

	fdtv->tone = tone;
	return 0;
}

static int fdtv_set_voltage(struct dvb_frontend *fe,
			    enum fe_sec_voltage voltage)
{
	struct firedtv *fdtv = fe->sec_priv;

	fdtv->voltage = voltage;
	return 0;
}

static int fdtv_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
	struct firedtv *fdtv = fe->sec_priv;
	struct firedtv_tuner_status stat;

	if (avc_tuner_status(fdtv, &stat))
		return -EINVAL;

	if (stat.no_rf)

Annotation

Implementation Notes