dvb_frontend.c 60.1 KB
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/*
 * dvb_frontend.c: DVB frontend tuning interface/thread
 *
 *
 * Copyright (C) 1999-2001 Ralph  Metzler
 *			   Marcus Metzler
 *			   Holger Waechtler
 *				      for convergence integrated media GmbH
 *
 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/poll.h>
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#include <linux/semaphore.h>
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#include <linux/module.h>
#include <linux/list.h>
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#include <linux/freezer.h>
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#include <linux/jiffies.h>
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#include <linux/kthread.h>
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#include <asm/processor.h>

#include "dvb_frontend.h"
#include "dvbdev.h"
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#include <linux/dvb/version.h>
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static int dvb_frontend_debug;
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static int dvb_shutdown_timeout;
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static int dvb_force_auto_inversion;
static int dvb_override_tune_delay;
static int dvb_powerdown_on_sleep = 1;
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static int dvb_mfe_wait_time = 5;
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module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
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MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
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module_param(dvb_shutdown_timeout, int, 0644);
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MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
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module_param(dvb_force_auto_inversion, int, 0644);
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MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
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module_param(dvb_override_tune_delay, int, 0644);
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MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
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module_param(dvb_powerdown_on_sleep, int, 0644);
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MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
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module_param(dvb_mfe_wait_time, int, 0644);
MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
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#define dprintk if (dvb_frontend_debug) printk

#define FESTATE_IDLE 1
#define FESTATE_RETUNE 2
#define FESTATE_TUNING_FAST 4
#define FESTATE_TUNING_SLOW 8
#define FESTATE_TUNED 16
#define FESTATE_ZIGZAG_FAST 32
#define FESTATE_ZIGZAG_SLOW 64
#define FESTATE_DISEQC 128
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#define FESTATE_ERROR 256
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#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
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#define FE_ALGO_HW		1
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/*
 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
 * FESTATE_TUNED. The frontend has successfully locked on.
 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
 * FESTATE_DISEQC. A DISEQC command has just been issued.
 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
 */

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#define DVB_FE_NO_EXIT	0
#define DVB_FE_NORMAL_EXIT	1
#define DVB_FE_DEVICE_REMOVED	2

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static DEFINE_MUTEX(frontend_mutex);
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struct dvb_frontend_private {

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	/* thread/frontend values */
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	struct dvb_device *dvbdev;
	struct dvb_frontend_parameters parameters;
	struct dvb_fe_events events;
	struct semaphore sem;
	struct list_head list_head;
	wait_queue_head_t wait_queue;
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	struct task_struct *thread;
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	unsigned long release_jiffies;
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	unsigned int exit;
	unsigned int wakeup;
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	fe_status_t status;
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	unsigned long tune_mode_flags;
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	unsigned int delay;
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	unsigned int reinitialise;
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	int tone;
	int voltage;
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	/* swzigzag values */
	unsigned int state;
	unsigned int bending;
	int lnb_drift;
	unsigned int inversion;
	unsigned int auto_step;
	unsigned int auto_sub_step;
	unsigned int started_auto_step;
	unsigned int min_delay;
	unsigned int max_drift;
	unsigned int step_size;
	int quality;
	unsigned int check_wrapped;
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	enum dvbfe_search algo_status;
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};

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static void dvb_frontend_wakeup(struct dvb_frontend *fe);
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static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
{
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	struct dvb_fe_events *events = &fepriv->events;
	struct dvb_frontend_event *e;
	int wp;

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	dprintk ("%s\n", __func__);
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	if (mutex_lock_interruptible (&events->mtx))
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		return;

	wp = (events->eventw + 1) % MAX_EVENT;

	if (wp == events->eventr) {
		events->overflow = 1;
		events->eventr = (events->eventr + 1) % MAX_EVENT;
	}

	e = &events->events[events->eventw];

	memcpy (&e->parameters, &fepriv->parameters,
		sizeof (struct dvb_frontend_parameters));

	if (status & FE_HAS_LOCK)
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		if (fe->ops.get_frontend)
			fe->ops.get_frontend(fe, &e->parameters);
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	events->eventw = wp;

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	mutex_unlock(&events->mtx);
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	e->status = status;

	wake_up_interruptible (&events->wait_queue);
}

static int dvb_frontend_get_event(struct dvb_frontend *fe,
			    struct dvb_frontend_event *event, int flags)
{
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	struct dvb_fe_events *events = &fepriv->events;

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	dprintk ("%s\n", __func__);
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	if (events->overflow) {
		events->overflow = 0;
		return -EOVERFLOW;
	}

	if (events->eventw == events->eventr) {
		int ret;

		if (flags & O_NONBLOCK)
			return -EWOULDBLOCK;

		up(&fepriv->sem);

		ret = wait_event_interruptible (events->wait_queue,
						events->eventw != events->eventr);

		if (down_interruptible (&fepriv->sem))
			return -ERESTARTSYS;

		if (ret < 0)
			return ret;
	}

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	if (mutex_lock_interruptible (&events->mtx))
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		return -ERESTARTSYS;

	memcpy (event, &events->events[events->eventr],
		sizeof(struct dvb_frontend_event));

	events->eventr = (events->eventr + 1) % MAX_EVENT;

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	mutex_unlock(&events->mtx);
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	return 0;
}

static void dvb_frontend_init(struct dvb_frontend *fe)
{
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	dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
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		 fe->dvb->num,
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		 fe->id,
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		 fe->ops.info.name);

	if (fe->ops.init)
		fe->ops.init(fe);
	if (fe->ops.tuner_ops.init) {
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		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);
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		fe->ops.tuner_ops.init(fe);
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);
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	}
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}

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void dvb_frontend_reinitialise(struct dvb_frontend *fe)
{
	struct dvb_frontend_private *fepriv = fe->frontend_priv;

	fepriv->reinitialise = 1;
	dvb_frontend_wakeup(fe);
}
EXPORT_SYMBOL(dvb_frontend_reinitialise);

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static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
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{
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	int q2;
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	dprintk ("%s\n", __func__);
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	if (locked)
		(fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
	else
		(fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
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	q2 = fepriv->quality - 128;
	q2 *= q2;
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	fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
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}

/**
 * Performs automatic twiddling of frontend parameters.
 *
 * @param fe The frontend concerned.
 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 * @returns Number of complete iterations that have been performed.
 */
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static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
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{
	int autoinversion;
	int ready = 0;
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	int fe_set_err = 0;
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	int original_inversion = fepriv->parameters.inversion;
	u32 original_frequency = fepriv->parameters.frequency;

	/* are we using autoinversion? */
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	autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
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			 (fepriv->parameters.inversion == INVERSION_AUTO));

	/* setup parameters correctly */
	while(!ready) {
		/* calculate the lnb_drift */
		fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;

		/* wrap the auto_step if we've exceeded the maximum drift */
		if (fepriv->lnb_drift > fepriv->max_drift) {
			fepriv->auto_step = 0;
			fepriv->auto_sub_step = 0;
			fepriv->lnb_drift = 0;
		}

		/* perform inversion and +/- zigzag */
		switch(fepriv->auto_sub_step) {
		case 0:
			/* try with the current inversion and current drift setting */
			ready = 1;
			break;

		case 1:
			if (!autoinversion) break;

			fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
			ready = 1;
			break;

		case 2:
			if (fepriv->lnb_drift == 0) break;

			fepriv->lnb_drift = -fepriv->lnb_drift;
			ready = 1;
			break;

		case 3:
			if (fepriv->lnb_drift == 0) break;
			if (!autoinversion) break;

			fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
			fepriv->lnb_drift = -fepriv->lnb_drift;
			ready = 1;
			break;

		default:
			fepriv->auto_step++;
			fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
			break;
		}

		if (!ready) fepriv->auto_sub_step++;
	}

	/* if this attempt would hit where we started, indicate a complete
	 * iteration has occurred */
	if ((fepriv->auto_step == fepriv->started_auto_step) &&
	    (fepriv->auto_sub_step == 0) && check_wrapped) {
		return 1;
	}

	dprintk("%s: drift:%i inversion:%i auto_step:%i "
		"auto_sub_step:%i started_auto_step:%i\n",
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		__func__, fepriv->lnb_drift, fepriv->inversion,
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		fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);

	/* set the frontend itself */
	fepriv->parameters.frequency += fepriv->lnb_drift;
	if (autoinversion)
		fepriv->parameters.inversion = fepriv->inversion;
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	if (fe->ops.set_frontend)
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		fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
	if (fe_set_err < 0) {
		fepriv->state = FESTATE_ERROR;
		return fe_set_err;
	}
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	fepriv->parameters.frequency = original_frequency;
	fepriv->parameters.inversion = original_inversion;

	fepriv->auto_sub_step++;
	return 0;
}

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static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
{
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	fe_status_t s = 0;
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	int retval = 0;
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;

	/* if we've got no parameters, just keep idling */
	if (fepriv->state & FESTATE_IDLE) {
		fepriv->delay = 3*HZ;
		fepriv->quality = 0;
		return;
	}

	/* in SCAN mode, we just set the frontend when asked and leave it alone */
	if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
		if (fepriv->state & FESTATE_RETUNE) {
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			if (fe->ops.set_frontend)
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				retval = fe->ops.set_frontend(fe,
							&fepriv->parameters);
			if (retval < 0)
				fepriv->state = FESTATE_ERROR;
			else
				fepriv->state = FESTATE_TUNED;
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		}
		fepriv->delay = 3*HZ;
		fepriv->quality = 0;
		return;
	}

	/* get the frontend status */
	if (fepriv->state & FESTATE_RETUNE) {
		s = 0;
	} else {
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		if (fe->ops.read_status)
			fe->ops.read_status(fe, &s);
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		if (s != fepriv->status) {
			dvb_frontend_add_event(fe, s);
			fepriv->status = s;
		}
	}

	/* if we're not tuned, and we have a lock, move to the TUNED state */
	if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
		dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
		fepriv->state = FESTATE_TUNED;

		/* if we're tuned, then we have determined the correct inversion */
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		if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
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		    (fepriv->parameters.inversion == INVERSION_AUTO)) {
			fepriv->parameters.inversion = fepriv->inversion;
		}
		return;
	}

	/* if we are tuned already, check we're still locked */
	if (fepriv->state & FESTATE_TUNED) {
		dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);

		/* we're tuned, and the lock is still good... */
		if (s & FE_HAS_LOCK) {
			return;
		} else { /* if we _WERE_ tuned, but now don't have a lock */
			fepriv->state = FESTATE_ZIGZAG_FAST;
			fepriv->started_auto_step = fepriv->auto_step;
			fepriv->check_wrapped = 0;
		}
	}

	/* don't actually do anything if we're in the LOSTLOCK state,
	 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
	if ((fepriv->state & FESTATE_LOSTLOCK) &&
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	    (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
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		dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
		return;
	}

	/* don't do anything if we're in the DISEQC state, since this
	 * might be someone with a motorized dish controlled by DISEQC.
	 * If its actually a re-tune, there will be a SET_FRONTEND soon enough.	*/
	if (fepriv->state & FESTATE_DISEQC) {
		dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
		return;
	}

	/* if we're in the RETUNE state, set everything up for a brand
	 * new scan, keeping the current inversion setting, as the next
	 * tune is _very_ likely to require the same */
	if (fepriv->state & FESTATE_RETUNE) {
		fepriv->lnb_drift = 0;
		fepriv->auto_step = 0;
		fepriv->auto_sub_step = 0;
		fepriv->started_auto_step = 0;
		fepriv->check_wrapped = 0;
	}

	/* fast zigzag. */
	if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
		fepriv->delay = fepriv->min_delay;

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		/* perform a tune */
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		retval = dvb_frontend_swzigzag_autotune(fe,
							fepriv->check_wrapped);
		if (retval < 0) {
			return;
		} else if (retval) {
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			/* OK, if we've run out of trials at the fast speed.
			 * Drop back to slow for the _next_ attempt */
			fepriv->state = FESTATE_SEARCHING_SLOW;
			fepriv->started_auto_step = fepriv->auto_step;
			return;
		}
		fepriv->check_wrapped = 1;

		/* if we've just retuned, enter the ZIGZAG_FAST state.
		 * This ensures we cannot return from an
		 * FE_SET_FRONTEND ioctl before the first frontend tune
		 * occurs */
		if (fepriv->state & FESTATE_RETUNE) {
			fepriv->state = FESTATE_TUNING_FAST;
		}
	}

	/* slow zigzag */
	if (fepriv->state & FESTATE_SEARCHING_SLOW) {
		dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);

		/* Note: don't bother checking for wrapping; we stay in this
		 * state until we get a lock */
		dvb_frontend_swzigzag_autotune(fe, 0);
	}
}

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static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
{
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	if (fepriv->exit != DVB_FE_NO_EXIT)
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		return 1;

	if (fepriv->dvbdev->writers == 1)
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		if (time_after(jiffies, fepriv->release_jiffies +
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				  dvb_shutdown_timeout * HZ))
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			return 1;

	return 0;
}

static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
{
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	if (fepriv->wakeup) {
		fepriv->wakeup = 0;
		return 1;
	}
	return dvb_frontend_is_exiting(fe);
}

static void dvb_frontend_wakeup(struct dvb_frontend *fe)
{
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	fepriv->wakeup = 1;
	wake_up_interruptible(&fepriv->wait_queue);
}

static int dvb_frontend_thread(void *data)
{
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	struct dvb_frontend *fe = data;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	unsigned long timeout;
	fe_status_t s;
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	enum dvbfe_algo algo;

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	struct dvb_frontend_parameters *params;
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	dprintk("%s\n", __func__);
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	fepriv->check_wrapped = 0;
	fepriv->quality = 0;
	fepriv->delay = 3*HZ;
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	fepriv->status = 0;
	fepriv->wakeup = 0;
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	fepriv->reinitialise = 0;

	dvb_frontend_init(fe);
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	set_freezable();
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	while (1) {
		up(&fepriv->sem);	    /* is locked when we enter the thread... */
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restart:
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		timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
560 561
			dvb_frontend_should_wakeup(fe) || kthread_should_stop()
				|| freezing(current),
562 563 564
			fepriv->delay);

		if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
L
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565
			/* got signal or quitting */
566
			fepriv->exit = DVB_FE_NORMAL_EXIT;
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567 568 569
			break;
		}

570
		if (try_to_freeze())
571
			goto restart;
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572 573 574 575

		if (down_interruptible(&fepriv->sem))
			break;

576 577
		if (fepriv->reinitialise) {
			dvb_frontend_init(fe);
578
			if (fepriv->tone != -1) {
579
				fe->ops.set_tone(fe, fepriv->tone);
580 581
			}
			if (fepriv->voltage != -1) {
582
				fe->ops.set_voltage(fe, fepriv->voltage);
583
			}
584 585 586
			fepriv->reinitialise = 0;
		}

587
		/* do an iteration of the tuning loop */
588
		if (fe->ops.get_frontend_algo) {
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589 590 591 592 593 594
			algo = fe->ops.get_frontend_algo(fe);
			switch (algo) {
			case DVBFE_ALGO_HW:
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
				params = NULL; /* have we been asked to RETUNE ? */

595
				if (fepriv->state & FESTATE_RETUNE) {
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596
					dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
597
					params = &fepriv->parameters;
598 599 600
					fepriv->state = FESTATE_TUNED;
				}

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				if (fe->ops.tune)
					fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);

604
				if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
M
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605
					dprintk("%s: state changed, adding current state\n", __func__);
606 607 608
					dvb_frontend_add_event(fe, s);
					fepriv->status = s;
				}
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				break;
			case DVBFE_ALGO_SW:
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
612
				dvb_frontend_swzigzag(fe);
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				break;
			case DVBFE_ALGO_CUSTOM:
				params = NULL; /* have we been asked to RETUNE ?	*/
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
				if (fepriv->state & FESTATE_RETUNE) {
					dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
619
					params = &fepriv->parameters;
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					fepriv->state = FESTATE_TUNED;
				}
				/* Case where we are going to search for a carrier
				 * User asked us to retune again for some reason, possibly
				 * requesting a search with a new set of parameters
				 */
				if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
627
					if (fe->ops.search) {
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						fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
						/* We did do a search as was requested, the flags are
						 * now unset as well and has the flags wrt to search.
						 */
632 633 634
					} else {
						fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
					}
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				}
				/* Track the carrier if the search was successful */
				if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
					if (fe->ops.track)
						fe->ops.track(fe, &fepriv->parameters);
640 641 642 643 644 645 646 647 648 649 650 651 652 653
				} else {
					fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
					fepriv->delay = HZ / 2;
				}
				fe->ops.read_status(fe, &s);
				if (s != fepriv->status) {
					dvb_frontend_add_event(fe, s); /* update event list */
					fepriv->status = s;
					if (!(s & FE_HAS_LOCK)) {
						fepriv->delay = HZ / 10;
						fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
					} else {
						fepriv->delay = 60 * HZ;
					}
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				}
				break;
			default:
				dprintk("%s: UNDEFINED ALGO !\n", __func__);
				break;
			}
		} else {
661
			dvb_frontend_swzigzag(fe);
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662
		}
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	}

665 666 667
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
668
		if (fe->ops.tuner_ops.sleep) {
669 670
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 1);
671 672 673
			fe->ops.tuner_ops.sleep(fe);
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 0);
674
		}
675 676
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

679
	fepriv->thread = NULL;
680 681 682 683
	if (kthread_should_stop())
		fepriv->exit = DVB_FE_DEVICE_REMOVED;
	else
		fepriv->exit = DVB_FE_NO_EXIT;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
692
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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693

694
	dprintk ("%s\n", __func__);
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695

696
	fepriv->exit = DVB_FE_NORMAL_EXIT;
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697 698
	mb();

699
	if (!fepriv->thread)
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700 701
		return;

702
	kthread_stop(fepriv->thread);
703

704
	sema_init(&fepriv->sem, 1);
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	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
708 709 710
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755
s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
{
	return ((curtime.tv_usec < lasttime.tv_usec) ?
		1000000 - lasttime.tv_usec + curtime.tv_usec :
		curtime.tv_usec - lasttime.tv_usec);
}
EXPORT_SYMBOL(timeval_usec_diff);

static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
{
	curtime->tv_usec += add_usec;
	if (curtime->tv_usec >= 1000000) {
		curtime->tv_usec -= 1000000;
		curtime->tv_sec++;
	}
}

/*
 * Sleep until gettimeofday() > waketime + add_usec
 * This needs to be as precise as possible, but as the delay is
 * usually between 2ms and 32ms, it is done using a scheduled msleep
 * followed by usleep (normally a busy-wait loop) for the remainder
 */
void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
{
	struct timeval lasttime;
	s32 delta, newdelta;

	timeval_usec_add(waketime, add_usec);

	do_gettimeofday(&lasttime);
	delta = timeval_usec_diff(lasttime, *waketime);
	if (delta > 2500) {
		msleep((delta - 1500) / 1000);
		do_gettimeofday(&lasttime);
		newdelta = timeval_usec_diff(lasttime, *waketime);
		delta = (newdelta > delta) ? 0 : newdelta;
	}
	if (delta > 0)
		udelay(delta);
}
EXPORT_SYMBOL(dvb_frontend_sleep_until);

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static int dvb_frontend_start(struct dvb_frontend *fe)
{
	int ret;
759
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
760
	struct task_struct *fe_thread;
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761

762
	dprintk ("%s\n", __func__);
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763

764
	if (fepriv->thread) {
765
		if (fepriv->exit == DVB_FE_NO_EXIT)
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766 767 768 769 770 771 772 773 774 775 776
			return 0;
		else
			dvb_frontend_stop (fe);
	}

	if (signal_pending(current))
		return -EINTR;
	if (down_interruptible (&fepriv->sem))
		return -EINTR;

	fepriv->state = FESTATE_IDLE;
777
	fepriv->exit = DVB_FE_NO_EXIT;
778
	fepriv->thread = NULL;
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	mb();

781
	fe_thread = kthread_run(dvb_frontend_thread, fe,
782
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
783 784 785
	if (IS_ERR(fe_thread)) {
		ret = PTR_ERR(fe_thread);
		printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
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786 787 788
		up(&fepriv->sem);
		return ret;
	}
789
	fepriv->thread = fe_thread;
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	return 0;
}

793
static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
794 795 796 797 798 799 800 801 802 803 804 805
					u32 *freq_min, u32 *freq_max)
{
	*freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);

	if (fe->ops.info.frequency_max == 0)
		*freq_max = fe->ops.tuner_ops.info.frequency_max;
	else if (fe->ops.tuner_ops.info.frequency_max == 0)
		*freq_max = fe->ops.info.frequency_max;
	else
		*freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);

	if (*freq_min == 0 || *freq_max == 0)
806 807
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
808 809
}

810 811 812
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
813 814 815
	u32 freq_min;
	u32 freq_max;

816
	/* range check: frequency */
817
	dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
818 819
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
820 821
		printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
		       fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
822 823 824 825 826 827 828 829 830
		return -EINVAL;
	}

	/* range check: symbol rate */
	if (fe->ops.info.type == FE_QPSK) {
		if ((fe->ops.info.symbol_rate_min &&
		     parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
		    (fe->ops.info.symbol_rate_max &&
		     parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
831 832
			printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
			       fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
833 834 835 836 837 838 839 840 841
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}

	} else if (fe->ops.info.type == FE_QAM) {
		if ((fe->ops.info.symbol_rate_min &&
		     parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
		    (fe->ops.info.symbol_rate_max &&
		     parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
842 843
			printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
			       fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
844 845 846 847 848
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

849 850 851 852 853 854 855 856 857
	/* check for supported modulation */
	if (fe->ops.info.type == FE_QAM &&
	    (parms->u.qam.modulation > QAM_AUTO ||
	     !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
		printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
		       fe->dvb->num, fe->id, parms->u.qam.modulation);
			return -EINVAL;
	}

858 859 860
	return 0;
}

861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
{
	int i;

	memset(&(fe->dtv_property_cache), 0,
			sizeof(struct dtv_frontend_properties));

	fe->dtv_property_cache.state = DTV_CLEAR;
	fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
	fe->dtv_property_cache.inversion = INVERSION_AUTO;
	fe->dtv_property_cache.fec_inner = FEC_AUTO;
	fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
	fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
	fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
	fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
	fe->dtv_property_cache.symbol_rate = QAM_AUTO;
	fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
	fe->dtv_property_cache.code_rate_LP = FEC_AUTO;

	fe->dtv_property_cache.isdbt_partial_reception = -1;
	fe->dtv_property_cache.isdbt_sb_mode = -1;
	fe->dtv_property_cache.isdbt_sb_subchannel = -1;
	fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
	fe->dtv_property_cache.isdbt_sb_segment_count = -1;
	fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
	for (i = 0; i < 3; i++) {
		fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
		fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
		fe->dtv_property_cache.layer[i].interleaving = -1;
		fe->dtv_property_cache.layer[i].segment_count = -1;
	}

	return 0;
}

#define _DTV_CMD(n, s, b) \
[n] = { \
	.name = #n, \
	.cmd  = n, \
	.set  = s,\
	.buffer = b \
}

904
static struct dtv_cmds_h dtv_cmds[] = {
905 906
	_DTV_CMD(DTV_TUNE, 1, 0),
	_DTV_CMD(DTV_CLEAR, 1, 0),
907 908

	/* Set */
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
	_DTV_CMD(DTV_FREQUENCY, 1, 0),
	_DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
	_DTV_CMD(DTV_MODULATION, 1, 0),
	_DTV_CMD(DTV_INVERSION, 1, 0),
	_DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
	_DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
	_DTV_CMD(DTV_INNER_FEC, 1, 0),
	_DTV_CMD(DTV_VOLTAGE, 1, 0),
	_DTV_CMD(DTV_TONE, 1, 0),
	_DTV_CMD(DTV_PILOT, 1, 0),
	_DTV_CMD(DTV_ROLLOFF, 1, 0),
	_DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
	_DTV_CMD(DTV_HIERARCHY, 1, 0),
	_DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
	_DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
	_DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
	_DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
926 927 928 929 930 931

	_DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
	_DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
	_DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
932
	_DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950
	_DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),

	_DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
	_DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
	_DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
951
	_DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
952 953 954 955 956 957 958 959 960 961 962 963 964
	_DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),

965 966
	_DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),

967
	/* Get */
968 969 970 971 972 973 974
	_DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
	_DTV_CMD(DTV_API_VERSION, 0, 0),
	_DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
	_DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
	_DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
	_DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
	_DTV_CMD(DTV_HIERARCHY, 0, 0),
975 976
};

977
static void dtv_property_dump(struct dtv_property *tvp)
978 979 980
{
	int i;

981
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
982
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
983 984 985 986
			__func__, tvp->cmd);
		return;
	}

987 988
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
989
		,tvp->cmd
990
		,dtv_cmds[ tvp->cmd ].name);
991

992
	if(dtv_cmds[ tvp->cmd ].buffer) {
993

994 995
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
996 997 998
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
999 1000
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
1001 1002 1003 1004
				,i
				,tvp->u.buffer.data[i]);

	} else
1005
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1006 1007
}

1008
static int is_legacy_delivery_system(fe_delivery_system_t s)
1009 1010
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1011 1012
	   (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
	   (s == SYS_ATSC))
1013 1014 1015 1016 1017
		return 1;

	return 0;
}

1018 1019 1020 1021
/* Synchronise the legacy tuning parameters into the cache, so that demodulator
 * drivers can use a single set_frontend tuning function, regardless of whether
 * it's being used for the legacy or new API, reducing code and complexity.
 */
1022 1023
static void dtv_property_cache_sync(struct dvb_frontend *fe,
				    struct dvb_frontend_parameters *p)
1024 1025 1026 1027 1028 1029 1030 1031
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	c->frequency = p->frequency;
	c->inversion = p->inversion;

	switch (fe->ops.info.type) {
	case FE_QPSK:
1032 1033
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1034 1035
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
1036
		c->delivery_system = SYS_DVBS;
1037 1038 1039 1040 1041
		break;
	case FE_QAM:
		c->symbol_rate = p->u.qam.symbol_rate;
		c->fec_inner = p->u.qam.fec_inner;
		c->modulation = p->u.qam.modulation;
1042
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1043 1044
		break;
	case FE_OFDM:
1045 1046 1047 1048 1049 1050 1051 1052 1053
		if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
			c->bandwidth_hz = 6000000;
		else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
			c->bandwidth_hz = 7000000;
		else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
			c->bandwidth_hz = 8000000;
		else
			/* Including BANDWIDTH_AUTO */
			c->bandwidth_hz = 0;
1054 1055 1056 1057 1058 1059
		c->code_rate_HP = p->u.ofdm.code_rate_HP;
		c->code_rate_LP = p->u.ofdm.code_rate_LP;
		c->modulation = p->u.ofdm.constellation;
		c->transmission_mode = p->u.ofdm.transmission_mode;
		c->guard_interval = p->u.ofdm.guard_interval;
		c->hierarchy = p->u.ofdm.hierarchy_information;
1060
		c->delivery_system = SYS_DVBT;
1061 1062 1063
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
1064 1065 1066 1067
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1068 1069 1070 1071
		break;
	}
}

1072 1073 1074
/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the advanced tuning API.
 */
1075
static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1076
{
1077
	const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1078 1079
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1080

1081 1082
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1083

1084 1085
	switch (fe->ops.info.type) {
	case FE_QPSK:
1086
		dprintk("%s() Preparing QPSK req\n", __func__);
1087 1088 1089 1090
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
		break;
	case FE_QAM:
1091
		dprintk("%s() Preparing QAM req\n", __func__);
1092 1093 1094 1095 1096
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
		break;
	case FE_OFDM:
1097
		dprintk("%s() Preparing OFDM req\n", __func__);
1098 1099 1100 1101 1102 1103 1104 1105
		if (c->bandwidth_hz == 6000000)
			p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
		else if (c->bandwidth_hz == 7000000)
			p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
		else if (c->bandwidth_hz == 8000000)
			p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
		else
			p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1106 1107 1108 1109 1110 1111 1112 1113
		p->u.ofdm.code_rate_HP = c->code_rate_HP;
		p->u.ofdm.code_rate_LP = c->code_rate_LP;
		p->u.ofdm.constellation = c->modulation;
		p->u.ofdm.transmission_mode = c->transmission_mode;
		p->u.ofdm.guard_interval = c->guard_interval;
		p->u.ofdm.hierarchy_information = c->hierarchy;
		break;
	case FE_ATSC:
1114
		dprintk("%s() Preparing VSB req\n", __func__);
1115 1116 1117 1118 1119 1120 1121 1122
		p->u.vsb.modulation = c->modulation;
		break;
	}
}

/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the legacy tuning API.
 */
1123
static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1124
{
1125
	const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1126
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1127
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1128

1129 1130 1131 1132
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1133 1134
	case PSK_8:
	case APSK_16:
1135
	case APSK_32:
1136
	case QPSK:
1137 1138 1139 1140 1141 1142 1143
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
		break;
	default:
		break;
	}

1144 1145 1146
	/* Fake out a generic DVB-T request so we pass validation in the ioctl */
	if ((c->delivery_system == SYS_ISDBT) ||
	    (c->delivery_system == SYS_DVBT2)) {
1147 1148 1149 1150 1151 1152
		p->u.ofdm.constellation = QAM_AUTO;
		p->u.ofdm.code_rate_HP = FEC_AUTO;
		p->u.ofdm.code_rate_LP = FEC_AUTO;
		p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
		p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
		p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1153 1154 1155 1156 1157 1158 1159 1160
		if (c->bandwidth_hz == 8000000)
			p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
		else if (c->bandwidth_hz == 7000000)
			p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
		else if (c->bandwidth_hz == 6000000)
			p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
		else
			p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1161 1162 1163
	}
}

1164
static void dtv_property_cache_submit(struct dvb_frontend *fe)
1165
{
1166
	const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1167 1168 1169 1170 1171

	/* For legacy delivery systems we don't need the delivery_system to
	 * be specified, but we populate the older structures from the cache
	 * so we can call set_frontend on older drivers.
	 */
1172 1173
	if(is_legacy_delivery_system(c->delivery_system)) {

1174
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1175
		dtv_property_legacy_params_sync(fe);
1176 1177

	} else {
1178
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1179

1180 1181 1182 1183 1184 1185
		/* For advanced delivery systems / modulation types ...
		 * we seed the lecacy dvb_frontend_parameters structure
		 * so that the sanity checking code later in the IOCTL processing
		 * can validate our basic frequency ranges, symbolrates, modulation
		 * etc.
		 */
1186
		dtv_property_adv_params_sync(fe);
1187 1188 1189
	}
}

1190
static int dvb_frontend_ioctl_legacy(struct file *file,
1191
			unsigned int cmd, void *parg);
1192
static int dvb_frontend_ioctl_properties(struct file *file,
1193 1194
			unsigned int cmd, void *parg);

1195 1196
static int dtv_property_process_get(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
1197
				    struct file *file)
1198 1199 1200
{
	int r = 0;

1201 1202 1203 1204 1205 1206 1207
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1208 1209 1210 1211 1212 1213 1214
	switch(tvp->cmd) {
	case DTV_FREQUENCY:
		tvp->u.data = fe->dtv_property_cache.frequency;
		break;
	case DTV_MODULATION:
		tvp->u.data = fe->dtv_property_cache.modulation;
		break;
1215 1216
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
		break;
	case DTV_INVERSION:
		tvp->u.data = fe->dtv_property_cache.inversion;
		break;
	case DTV_SYMBOL_RATE:
		tvp->u.data = fe->dtv_property_cache.symbol_rate;
		break;
	case DTV_INNER_FEC:
		tvp->u.data = fe->dtv_property_cache.fec_inner;
		break;
	case DTV_PILOT:
		tvp->u.data = fe->dtv_property_cache.pilot;
		break;
	case DTV_ROLLOFF:
		tvp->u.data = fe->dtv_property_cache.rolloff;
		break;
	case DTV_DELIVERY_SYSTEM:
		tvp->u.data = fe->dtv_property_cache.delivery_system;
		break;
	case DTV_VOLTAGE:
		tvp->u.data = fe->dtv_property_cache.voltage;
		break;
	case DTV_TONE:
		tvp->u.data = fe->dtv_property_cache.sectone;
		break;
1242 1243 1244
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1245 1246 1247 1248 1249 1250
	case DTV_CODE_RATE_HP:
		tvp->u.data = fe->dtv_property_cache.code_rate_HP;
		break;
	case DTV_CODE_RATE_LP:
		tvp->u.data = fe->dtv_property_cache.code_rate_LP;
		break;
1251 1252 1253 1254 1255 1256
	case DTV_GUARD_INTERVAL:
		tvp->u.data = fe->dtv_property_cache.guard_interval;
		break;
	case DTV_TRANSMISSION_MODE:
		tvp->u.data = fe->dtv_property_cache.transmission_mode;
		break;
1257 1258 1259
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276

	/* ISDB-T Support here */
	case DTV_ISDBT_PARTIAL_RECEPTION:
		tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
		break;
	case DTV_ISDBT_SOUND_BROADCASTING:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
		break;
	case DTV_ISDBT_SB_SUBCHANNEL_ID:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
		break;
	case DTV_ISDBT_SB_SEGMENT_IDX:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
		break;
	case DTV_ISDBT_SB_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
		break;
1277 1278 1279
	case DTV_ISDBT_LAYER_ENABLED:
		tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
		break;
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315
	case DTV_ISDBT_LAYERA_FEC:
		tvp->u.data = fe->dtv_property_cache.layer[0].fec;
		break;
	case DTV_ISDBT_LAYERA_MODULATION:
		tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
		break;
	case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
		break;
	case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
		tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
		break;
	case DTV_ISDBT_LAYERB_FEC:
		tvp->u.data = fe->dtv_property_cache.layer[1].fec;
		break;
	case DTV_ISDBT_LAYERB_MODULATION:
		tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
		break;
	case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
		break;
	case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
		tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
		break;
	case DTV_ISDBT_LAYERC_FEC:
		tvp->u.data = fe->dtv_property_cache.layer[2].fec;
		break;
	case DTV_ISDBT_LAYERC_MODULATION:
		tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
		break;
	case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
		break;
	case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
		tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
		break;
1316 1317 1318
	case DTV_ISDBS_TS_ID:
		tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
		break;
1319 1320 1321
	case DTV_DVBT2_PLP_ID:
		tvp->u.data = fe->dtv_property_cache.dvbt2_plp_id;
		break;
1322
	default:
1323
		return -EINVAL;
1324 1325
	}

1326 1327
	dtv_property_dump(tvp);

1328
	return 0;
1329 1330
}

1331 1332 1333
static int dtv_property_process_set(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct file *file)
1334 1335
{
	int r = 0;
1336
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1337
	dtv_property_dump(tvp);
1338

1339
	/* Allow the frontend to validate incoming properties */
1340
	if (fe->ops.set_property) {
1341
		r = fe->ops.set_property(fe, tvp);
1342 1343 1344
		if (r < 0)
			return r;
	}
1345

1346
	switch(tvp->cmd) {
1347
	case DTV_CLEAR:
1348 1349 1350
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1351
		dvb_frontend_clear_cache(fe);
1352
		dprintk("%s() Flushing property cache\n", __func__);
1353
		break;
1354
	case DTV_TUNE:
1355
		/* interpret the cache of data, build either a traditional frontend
1356 1357
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1358
		 */
1359
		fe->dtv_property_cache.state = tvp->cmd;
1360
		dprintk("%s() Finalised property cache\n", __func__);
1361 1362
		dtv_property_cache_submit(fe);

1363
		r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1364
			&fepriv->parameters);
1365
		break;
1366
	case DTV_FREQUENCY:
1367
		fe->dtv_property_cache.frequency = tvp->u.data;
1368
		break;
1369
	case DTV_MODULATION:
1370
		fe->dtv_property_cache.modulation = tvp->u.data;
1371
		break;
1372 1373
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1374
		break;
1375
	case DTV_INVERSION:
1376
		fe->dtv_property_cache.inversion = tvp->u.data;
1377
		break;
1378
	case DTV_SYMBOL_RATE:
1379
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1380
		break;
1381
	case DTV_INNER_FEC:
1382
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1383
		break;
1384
	case DTV_PILOT:
1385
		fe->dtv_property_cache.pilot = tvp->u.data;
1386
		break;
1387
	case DTV_ROLLOFF:
1388
		fe->dtv_property_cache.rolloff = tvp->u.data;
1389
		break;
1390
	case DTV_DELIVERY_SYSTEM:
1391
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1392
		break;
1393
	case DTV_VOLTAGE:
1394
		fe->dtv_property_cache.voltage = tvp->u.data;
1395
		r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1396
			(void *)fe->dtv_property_cache.voltage);
1397
		break;
1398
	case DTV_TONE:
1399
		fe->dtv_property_cache.sectone = tvp->u.data;
1400
		r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1401
			(void *)fe->dtv_property_cache.sectone);
1402
		break;
1403 1404 1405 1406 1407 1408
	case DTV_CODE_RATE_HP:
		fe->dtv_property_cache.code_rate_HP = tvp->u.data;
		break;
	case DTV_CODE_RATE_LP:
		fe->dtv_property_cache.code_rate_LP = tvp->u.data;
		break;
1409 1410 1411 1412 1413 1414
	case DTV_GUARD_INTERVAL:
		fe->dtv_property_cache.guard_interval = tvp->u.data;
		break;
	case DTV_TRANSMISSION_MODE:
		fe->dtv_property_cache.transmission_mode = tvp->u.data;
		break;
1415 1416 1417
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434

	/* ISDB-T Support here */
	case DTV_ISDBT_PARTIAL_RECEPTION:
		fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
		break;
	case DTV_ISDBT_SOUND_BROADCASTING:
		fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
		break;
	case DTV_ISDBT_SB_SUBCHANNEL_ID:
		fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
		break;
	case DTV_ISDBT_SB_SEGMENT_IDX:
		fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
		break;
	case DTV_ISDBT_SB_SEGMENT_COUNT:
		fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
		break;
1435 1436 1437
	case DTV_ISDBT_LAYER_ENABLED:
		fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
		break;
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473
	case DTV_ISDBT_LAYERA_FEC:
		fe->dtv_property_cache.layer[0].fec = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERA_MODULATION:
		fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
		fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
		fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_FEC:
		fe->dtv_property_cache.layer[1].fec = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_MODULATION:
		fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
		fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
		fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_FEC:
		fe->dtv_property_cache.layer[2].fec = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_MODULATION:
		fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
		fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
		fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
		break;
1474 1475
	case DTV_ISDBS_TS_ID:
		fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1476 1477 1478
		break;
	case DTV_DVBT2_PLP_ID:
		fe->dtv_property_cache.dvbt2_plp_id = tvp->u.data;
1479
		break;
1480
	default:
1481
		return -EINVAL;
1482 1483
	}

1484
	return r;
1485 1486
}

1487
static int dvb_frontend_ioctl(struct file *file,
L
Linus Torvalds 已提交
1488 1489 1490 1491
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1492
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1493 1494
	int err = -EOPNOTSUPP;

1495
	dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
L
Linus Torvalds 已提交
1496

1497
	if (fepriv->exit != DVB_FE_NO_EXIT)
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1498 1499 1500 1501 1502 1503 1504 1505 1506 1507
		return -ENODEV;

	if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
	    (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
	     cmd == FE_DISEQC_RECV_SLAVE_REPLY))
		return -EPERM;

	if (down_interruptible (&fepriv->sem))
		return -ERESTARTSYS;

1508
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1509
		err = dvb_frontend_ioctl_properties(file, cmd, parg);
1510 1511
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1512
		err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1513
	}
1514 1515 1516 1517 1518

	up(&fepriv->sem);
	return err;
}

1519
static int dvb_frontend_ioctl_properties(struct file *file,
1520 1521 1522 1523
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1524
	int err = 0;
1525 1526 1527 1528

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1529 1530 1531

	dprintk("%s\n", __func__);

1532
	if(cmd == FE_SET_PROPERTY) {
1533
		tvps = (struct dtv_properties __user *)parg;
1534

1535 1536
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1537 1538 1539

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1540
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1541 1542
			return -EINVAL;

1543
		tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1544 1545 1546
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1547 1548
		}

1549 1550 1551 1552 1553
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1554
		for (i = 0; i < tvps->num; i++) {
1555 1556 1557 1558
			err = dtv_property_process_set(fe, tvp + i, file);
			if (err < 0)
				goto out;
			(tvp + i)->result = err;
1559
		}
1560

1561 1562
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1563

1564 1565 1566 1567 1568
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1569 1570
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1571 1572 1573

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1574
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1575 1576
			return -EINVAL;

1577
		tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1578 1579 1580 1581 1582 1583 1584 1585 1586 1587
		if (!tvp) {
			err = -ENOMEM;
			goto out;
		}

		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1588
		for (i = 0; i < tvps->num; i++) {
1589 1590 1591 1592
			err = dtv_property_process_get(fe, tvp + i, file);
			if (err < 0)
				goto out;
			(tvp + i)->result = err;
1593
		}
1594 1595 1596 1597 1598 1599 1600 1601 1602

		if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

	} else
		err = -EOPNOTSUPP;

1603 1604
out:
	kfree(tvp);
1605 1606 1607
	return err;
}

1608
static int dvb_frontend_ioctl_legacy(struct file *file,
1609 1610 1611 1612 1613
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
	int cb_err, err = -EOPNOTSUPP;

	if (fe->dvb->fe_ioctl_override) {
		cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
						    DVB_FE_IOCTL_PRE);
		if (cb_err < 0)
			return cb_err;
		if (cb_err > 0)
			return 0;
		/* fe_ioctl_override returning 0 allows
		 * dvb-core to continue handling the ioctl */
	}
1626

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1627 1628
	switch (cmd) {
	case FE_GET_INFO: {
1629
		struct dvb_frontend_info* info = parg;
1630
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1631
		dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
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1632 1633 1634 1635 1636 1637 1638 1639

		/* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
		 * do it, it is done for it. */
		info->caps |= FE_CAN_INVERSION_AUTO;
		err = 0;
		break;
	}

1640 1641 1642
	case FE_READ_STATUS: {
		fe_status_t* status = parg;

L
Lucas De Marchi 已提交
1643
		/* if retune was requested but hasn't occurred yet, prevent
1644
		 * that user get signal state from previous tuning */
1645 1646
		if (fepriv->state == FESTATE_RETUNE ||
		    fepriv->state == FESTATE_ERROR) {
1647 1648 1649 1650 1651
			err=0;
			*status = 0;
			break;
		}

1652 1653
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
L
Linus Torvalds 已提交
1654
		break;
1655
	}
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1656
	case FE_READ_BER:
1657 1658
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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1659 1660 1661
		break;

	case FE_READ_SIGNAL_STRENGTH:
1662 1663
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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1664 1665 1666
		break;

	case FE_READ_SNR:
1667 1668
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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1669 1670 1671
		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1672 1673
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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1674 1675 1676 1677
		break;


	case FE_DISEQC_RESET_OVERLOAD:
1678 1679
		if (fe->ops.diseqc_reset_overload) {
			err = fe->ops.diseqc_reset_overload(fe);
L
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1680 1681 1682 1683 1684 1685
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_MASTER_CMD:
1686 1687
		if (fe->ops.diseqc_send_master_cmd) {
			err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
L
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1688 1689 1690 1691 1692 1693
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_BURST:
1694 1695
		if (fe->ops.diseqc_send_burst) {
			err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
L
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1696 1697 1698 1699 1700 1701
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_TONE:
1702 1703
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1704
			fepriv->tone = (fe_sec_tone_mode_t) parg;
L
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1705 1706 1707 1708 1709 1710
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1711 1712
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1713
			fepriv->voltage = (fe_sec_voltage_t) parg;
L
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1714 1715 1716 1717 1718 1719
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISHNETWORK_SEND_LEGACY_CMD:
1720 1721
		if (fe->ops.dishnetwork_send_legacy_command) {
			err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
L
Linus Torvalds 已提交
1722 1723
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
1724
		} else if (fe->ops.set_voltage) {
1725 1726 1727 1728 1729
			/*
			 * NOTE: This is a fallback condition.  Some frontends
			 * (stv0299 for instance) take longer than 8msec to
			 * respond to a set_voltage command.  Those switches
			 * need custom routines to switch properly.  For all
1730
			 * other frontends, the following should work ok.
1731 1732 1733
			 * Dish network legacy switches (as used by Dish500)
			 * are controlled by sending 9-bit command words
			 * spaced 8msec apart.
L
Lucas De Marchi 已提交
1734
			 * the actual command word is switch/port dependent
1735 1736 1737 1738 1739 1740
			 * so it is up to the userspace application to send
			 * the right command.
			 * The command must always start with a '0' after
			 * initialization, so parg is 8 bits and does not
			 * include the initialization or start bit
			 */
1741
			unsigned long swcmd = ((unsigned long) parg) << 1;
1742 1743 1744 1745 1746
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1747
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1748 1749 1750 1751 1752 1753
			do_gettimeofday(&nexttime);
			if (dvb_frontend_debug)
				memcpy(&tv[0], &nexttime, sizeof(struct timeval));
			/* before sending a command, initialize by sending
			 * a 32ms 18V to the switch
			 */
1754
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1755 1756 1757 1758 1759
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1760
				if ((swcmd & 0x01) != last) {
1761
					/* set voltage to (last ? 13V : 18V) */
1762
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1763 1764
					last = (last) ? 0 : 1;
				}
1765
				swcmd = swcmd >> 1;
1766 1767 1768 1769 1770
				if (i != 8)
					dvb_frontend_sleep_until(&nexttime, 8000);
			}
			if (dvb_frontend_debug) {
				printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1771
					__func__, fe->dvb->num);
1772 1773 1774 1775 1776 1777
				for (i = 1; i < 10; i++)
					printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
			}
			err = 0;
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
L
Linus Torvalds 已提交
1778 1779 1780 1781
		}
		break;

	case FE_DISEQC_RECV_SLAVE_REPLY:
1782 1783
		if (fe->ops.diseqc_recv_slave_reply)
			err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
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1784 1785 1786
		break;

	case FE_ENABLE_HIGH_LNB_VOLTAGE:
1787 1788
		if (fe->ops.enable_high_lnb_voltage)
			err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
L
Linus Torvalds 已提交
1789 1790 1791 1792 1793
		break;

	case FE_SET_FRONTEND: {
		struct dvb_frontend_tune_settings fetunesettings;

1794
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1795 1796 1797 1798 1799 1800 1801 1802 1803
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1804

1805 1806
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1807
			dtv_property_cache_sync(fe, &fepriv->parameters);
1808
		}
L
Linus Torvalds 已提交
1809 1810 1811 1812 1813 1814 1815 1816 1817 1818

		memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
		memcpy(&fetunesettings.parameters, parg,
		       sizeof (struct dvb_frontend_parameters));

		/* force auto frequency inversion if requested */
		if (dvb_force_auto_inversion) {
			fepriv->parameters.inversion = INVERSION_AUTO;
			fetunesettings.parameters.inversion = INVERSION_AUTO;
		}
1819
		if (fe->ops.info.type == FE_OFDM) {
1820
			/* without hierarchical coding code_rate_LP is irrelevant,
L
Linus Torvalds 已提交
1821 1822 1823 1824 1825 1826 1827
			 * so we tolerate the otherwise invalid FEC_NONE setting */
			if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
			    fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
				fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
		}

		/* get frontend-specific tuning settings */
1828
		if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
L
Linus Torvalds 已提交
1829 1830 1831 1832 1833
			fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
			fepriv->max_drift = fetunesettings.max_drift;
			fepriv->step_size = fetunesettings.step_size;
		} else {
			/* default values */
1834
			switch(fe->ops.info.type) {
L
Linus Torvalds 已提交
1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
			case FE_QPSK:
				fepriv->min_delay = HZ/20;
				fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
				fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
				break;

			case FE_QAM:
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0; /* no zigzag */
				fepriv->max_drift = 0;
				break;

			case FE_OFDM:
				fepriv->min_delay = HZ/20;
1849 1850
				fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
				fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
L
Linus Torvalds 已提交
1851 1852
				break;
			case FE_ATSC:
1853 1854 1855
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0;
				fepriv->max_drift = 0;
L
Linus Torvalds 已提交
1856 1857 1858 1859 1860 1861 1862
				break;
			}
		}
		if (dvb_override_tune_delay > 0)
			fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;

		fepriv->state = FESTATE_RETUNE;
1863 1864 1865 1866

		/* Request the search algorithm to search */
		fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;

L
Linus Torvalds 已提交
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878
		dvb_frontend_wakeup(fe);
		dvb_frontend_add_event(fe, 0);
		fepriv->status = 0;
		err = 0;
		break;
	}

	case FE_GET_EVENT:
		err = dvb_frontend_get_event (fe, parg, file->f_flags);
		break;

	case FE_GET_FRONTEND:
1879
		if (fe->ops.get_frontend) {
L
Linus Torvalds 已提交
1880
			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1881
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
L
Linus Torvalds 已提交
1882 1883
		}
		break;
1884 1885

	case FE_SET_FRONTEND_TUNE_MODE:
1886
		fepriv->tune_mode_flags = (unsigned long) parg;
1887
		err = 0;
1888
		break;
L
Linus Torvalds 已提交
1889 1890
	};

1891 1892 1893 1894 1895 1896 1897
	if (fe->dvb->fe_ioctl_override) {
		cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
						    DVB_FE_IOCTL_POST);
		if (cb_err < 0)
			return cb_err;
	}

L
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1898 1899 1900
	return err;
}

1901

L
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1902 1903 1904 1905
static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1906
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1907

1908
	dprintk ("%s\n", __func__);
L
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1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921

	poll_wait (file, &fepriv->events.wait_queue, wait);

	if (fepriv->events.eventw != fepriv->events.eventr)
		return (POLLIN | POLLRDNORM | POLLPRI);

	return 0;
}

static int dvb_frontend_open(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1922
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1923
	struct dvb_adapter *adapter = fe->dvb;
L
Linus Torvalds 已提交
1924 1925
	int ret;

1926
	dprintk ("%s\n", __func__);
1927 1928
	if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
		return -ENODEV;
L
Linus Torvalds 已提交
1929

1930 1931
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950

		if (adapter->mfe_dvbdev == NULL)
			adapter->mfe_dvbdev = dvbdev;

		else if (adapter->mfe_dvbdev != dvbdev) {
			struct dvb_device
				*mfedev = adapter->mfe_dvbdev;
			struct dvb_frontend
				*mfe = mfedev->priv;
			struct dvb_frontend_private
				*mfepriv = mfe->frontend_priv;
			int mferetry = (dvb_mfe_wait_time << 1);

			mutex_unlock (&adapter->mfe_lock);
			while (mferetry-- && (mfedev->users != -1 ||
					mfepriv->thread != NULL)) {
				if(msleep_interruptible(500)) {
					if(signal_pending(current))
						return -EINTR;
1951
				}
1952 1953 1954 1955
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
1956 1957 1958
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
1959 1960 1961 1962
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
1963
				}
1964
				adapter->mfe_dvbdev = dvbdev;
1965 1966 1967 1968
			}
		}
	}

1969 1970
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1971
			goto err0;
1972 1973
	}

1974 1975
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1976

1977
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1978 1979 1980 1981 1982
		/* normal tune mode when opened R/W */
		fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
		fepriv->tone = -1;
		fepriv->voltage = -1;

L
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1983 1984
		ret = dvb_frontend_start (fe);
		if (ret)
1985
			goto err2;
L
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1986 1987 1988 1989 1990

		/*  empty event queue */
		fepriv->events.eventr = fepriv->events.eventw = 0;
	}

1991 1992
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
L
Linus Torvalds 已提交
1993
	return ret;
1994 1995 1996 1997 1998 1999

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
2000 2001 2002
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
2003
	return ret;
L
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2004 2005 2006 2007 2008 2009
}

static int dvb_frontend_release(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
2010
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2011
	int ret;
L
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2012

2013
	dprintk ("%s\n", __func__);
L
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2014 2015 2016 2017

	if ((file->f_flags & O_ACCMODE) != O_RDONLY)
		fepriv->release_jiffies = jiffies;

2018 2019
	ret = dvb_generic_release (inode, file);

2020
	if (dvbdev->users == -1) {
2021
		if (fepriv->exit != DVB_FE_NO_EXIT) {
2022 2023 2024 2025 2026 2027
			fops_put(file->f_op);
			file->f_op = NULL;
			wake_up(&dvbdev->wait_queue);
		}
		if (fe->ops.ts_bus_ctrl)
			fe->ops.ts_bus_ctrl(fe, 0);
2028
	}
2029

2030
	return ret;
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}

2033
static const struct file_operations dvb_frontend_fops = {
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	.owner		= THIS_MODULE,
2035
	.unlocked_ioctl	= dvb_generic_ioctl,
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	.poll		= dvb_frontend_poll,
	.open		= dvb_frontend_open,
2038 2039
	.release	= dvb_frontend_release,
	.llseek		= noop_llseek,
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};

int dvb_register_frontend(struct dvb_adapter* dvb,
			  struct dvb_frontend* fe)
{
	struct dvb_frontend_private *fepriv;
	static const struct dvb_device dvbdev_template = {
		.users = ~0,
		.writers = 1,
		.readers = (~0)-1,
		.fops = &dvb_frontend_fops,
		.kernel_ioctl = dvb_frontend_ioctl
	};

2054
	dprintk ("%s\n", __func__);
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2056
	if (mutex_lock_interruptible(&frontend_mutex))
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		return -ERESTARTSYS;

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2059
	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
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	if (fe->frontend_priv == NULL) {
2061
		mutex_unlock(&frontend_mutex);
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		return -ENOMEM;
	}
2064
	fepriv = fe->frontend_priv;
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2066
	sema_init(&fepriv->sem, 1);
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	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
2069
	mutex_init(&fepriv->events.mtx);
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	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

2073
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
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		fe->dvb->num,
2075
		fe->id,
2076
		fe->ops.info.name);
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	dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
			     fe, DVB_DEVICE_FRONTEND);

2081
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
2088
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2089
	dprintk ("%s\n", __func__);
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2090

2091
	mutex_lock(&frontend_mutex);
2092
	dvb_frontend_stop (fe);
2093 2094 2095 2096 2097 2098
	mutex_unlock(&frontend_mutex);

	if (fepriv->dvbdev->users < -1)
		wait_event(fepriv->dvbdev->wait_queue,
				fepriv->dvbdev->users==-1);

2099
	mutex_lock(&frontend_mutex);
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2100
	dvb_unregister_device (fepriv->dvbdev);
2101

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2102 2103
	/* fe is invalid now */
	kfree(fepriv);
2104
	mutex_unlock(&frontend_mutex);
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2105 2106 2107
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
2108

2109
#ifdef CONFIG_MEDIA_ATTACH
2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121
void dvb_frontend_detach(struct dvb_frontend* fe)
{
	void *ptr;

	if (fe->ops.release_sec) {
		fe->ops.release_sec(fe);
		symbol_put_addr(fe->ops.release_sec);
	}
	if (fe->ops.tuner_ops.release) {
		fe->ops.tuner_ops.release(fe);
		symbol_put_addr(fe->ops.tuner_ops.release);
	}
2122 2123 2124 2125
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
	ptr = (void*)fe->ops.release;
	if (ptr) {
		fe->ops.release(fe);
		symbol_put_addr(ptr);
	}
}
#else
void dvb_frontend_detach(struct dvb_frontend* fe)
{
	if (fe->ops.release_sec)
		fe->ops.release_sec(fe);
	if (fe->ops.tuner_ops.release)
		fe->ops.tuner_ops.release(fe);
2139 2140
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
2141 2142 2143 2144 2145
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);