dvb_frontend.c 51.0 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>
#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
#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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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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};

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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) {
		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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	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)
		fe->ops.set_frontend(fe, &fepriv->parameters);
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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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	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)
				fe->ops.set_frontend(fe, &fepriv->parameters);
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			fepriv->state = FESTATE_TUNED;
		}
		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;

		/* peform a tune */
		if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
			/* 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)
		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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	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,
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			dvb_frontend_should_wakeup(fe) || kthread_should_stop()
				|| freezing(current),
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			fepriv->delay);

		if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
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			/* got signal or quitting */
			break;
		}

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		if (try_to_freeze())
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			goto restart;
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		if (down_interruptible(&fepriv->sem))
			break;

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		if (fepriv->reinitialise) {
			dvb_frontend_init(fe);
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			if (fepriv->tone != -1) {
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				fe->ops.set_tone(fe, fepriv->tone);
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			}
			if (fepriv->voltage != -1) {
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				fe->ops.set_voltage(fe, fepriv->voltage);
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			}
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			fepriv->reinitialise = 0;
		}

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		/* do an iteration of the tuning loop */
562 563 564 565 566 567 568 569 570 571 572 573 574 575
		if (fe->ops.get_frontend_algo) {
			if (fe->ops.get_frontend_algo(fe) == FE_ALGO_HW) {
				/* have we been asked to retune? */
				params = NULL;
				if (fepriv->state & FESTATE_RETUNE) {
					params = &fepriv->parameters;
					fepriv->state = FESTATE_TUNED;
				}

				fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
				if (s != fepriv->status) {
					dvb_frontend_add_event(fe, s);
					fepriv->status = s;
				}
576 577
			} else
				dvb_frontend_swzigzag(fe);
578 579
		} else
			dvb_frontend_swzigzag(fe);
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	}

582 583 584
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
585 586 587 588
		if (fe->ops.tuner_ops.sleep) {
			fe->ops.tuner_ops.sleep(fe);
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 0);
589
		}
590 591
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

594
	fepriv->thread = NULL;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
603
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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604

605
	dprintk ("%s\n", __func__);
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606 607 608 609

	fepriv->exit = 1;
	mb();

610
	if (!fepriv->thread)
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		return;

613
	kthread_stop(fepriv->thread);
614

615
	init_MUTEX (&fepriv->sem);
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616 617 618
	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
619 620 621
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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622 623
}

624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
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;
670
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
671
	struct task_struct *fe_thread;
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672

673
	dprintk ("%s\n", __func__);
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674

675
	if (fepriv->thread) {
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676 677 678 679 680 681 682 683 684 685 686 687 688
		if (!fepriv->exit)
			return 0;
		else
			dvb_frontend_stop (fe);
	}

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

	fepriv->state = FESTATE_IDLE;
	fepriv->exit = 0;
689
	fepriv->thread = NULL;
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	mb();

692
	fe_thread = kthread_run(dvb_frontend_thread, fe,
693
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
694 695 696
	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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697 698 699
		up(&fepriv->sem);
		return ret;
	}
700
	fepriv->thread = fe_thread;
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	return 0;
}

704 705 706 707 708 709 710 711 712 713 714 715 716
static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
					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)
717 718
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
719 720
}

721 722 723
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
724 725 726
	u32 freq_min;
	u32 freq_max;

727
	/* range check: frequency */
728 729 730
	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
731 732
		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);
733 734 735 736 737 738 739 740 741
		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)) {
742 743
			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,
744 745 746 747 748 749 750 751 752
			       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)) {
753 754
			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,
755 756 757 758 759 760 761 762
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

	return 0;
}

763
struct dtv_cmds_h dtv_cmds[] = {
764 765 766
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
767 768
		.set	= 1,
	},
769 770 771
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
772 773 774 775
		.set	= 1,
	},

	/* Set */
776 777 778
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
779 780
		.set	= 1,
	},
781 782 783
	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
784 785
		.set	= 1,
	},
786 787 788
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
789 790
		.set	= 1,
	},
791 792 793
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
794 795
		.set	= 1,
	},
796 797 798
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
799 800 801
		.set	= 1,
		.buffer	= 1,
	},
802 803 804
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
805 806
		.set	= 1,
	},
807 808 809
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
810 811
		.set	= 1,
	},
812 813 814
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
815 816
		.set	= 1,
	},
817 818 819
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
820 821
		.set	= 1,
	},
822 823 824
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
825 826
		.set	= 1,
	},
827 828 829
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
830 831
		.set	= 1,
	},
832 833 834
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
835 836
		.set	= 1,
	},
837 838 839 840 841
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 1,
	},
842 843 844 845 846 847 848 849 850 851
	[DTV_CODE_RATE_HP] = {
		.name	= "DTV_CODE_RATE_HP",
		.cmd	= DTV_CODE_RATE_HP,
		.set	= 1,
	},
	[DTV_CODE_RATE_LP] = {
		.name	= "DTV_CODE_RATE_LP",
		.cmd	= DTV_CODE_RATE_LP,
		.set	= 1,
	},
852 853 854 855 856 857 858 859 860 861
	[DTV_GUARD_INTERVAL] = {
		.name	= "DTV_GUARD_INTERVAL",
		.cmd	= DTV_GUARD_INTERVAL,
		.set	= 1,
	},
	[DTV_TRANSMISSION_MODE] = {
		.name	= "DTV_TRANSMISSION_MODE",
		.cmd	= DTV_TRANSMISSION_MODE,
		.set	= 1,
	},
862
	/* Get */
863 864 865
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
866 867 868
		.set	= 0,
		.buffer	= 1,
	},
869 870 871 872 873
	[DTV_API_VERSION] = {
		.name	= "DTV_API_VERSION",
		.cmd	= DTV_API_VERSION,
		.set	= 0,
	},
874 875 876 877 878 879 880 881 882 883
	[DTV_CODE_RATE_HP] = {
		.name	= "DTV_CODE_RATE_HP",
		.cmd	= DTV_CODE_RATE_HP,
		.set	= 0,
	},
	[DTV_CODE_RATE_LP] = {
		.name	= "DTV_CODE_RATE_LP",
		.cmd	= DTV_CODE_RATE_LP,
		.set	= 0,
	},
884 885 886 887 888 889 890 891 892 893
	[DTV_GUARD_INTERVAL] = {
		.name	= "DTV_GUARD_INTERVAL",
		.cmd	= DTV_GUARD_INTERVAL,
		.set	= 0,
	},
	[DTV_TRANSMISSION_MODE] = {
		.name	= "DTV_TRANSMISSION_MODE",
		.cmd	= DTV_TRANSMISSION_MODE,
		.set	= 0,
	},
894 895 896 897 898
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 0,
	},
899 900
};

901
void dtv_property_dump(struct dtv_property *tvp)
902 903 904
{
	int i;

905
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
906
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
907 908 909 910
			__func__, tvp->cmd);
		return;
	}

911 912
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
913
		,tvp->cmd
914
		,dtv_cmds[ tvp->cmd ].name);
915

916
	if(dtv_cmds[ tvp->cmd ].buffer) {
917

918 919
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
920 921 922
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
923 924
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
925 926 927 928
				,i
				,tvp->u.buffer.data[i]);

	} else
929
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
930 931 932 933 934 935 936 937 938 939 940
}

int is_legacy_delivery_system(fe_delivery_system_t s)
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
		(s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS))
		return 1;

	return 0;
}

941 942 943 944 945 946 947 948 949 950 951 952 953
/* 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.
 */
void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
{
	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:
954 955
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
956 957
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
958
		c->delivery_system = SYS_DVBS;
959 960 961 962 963
		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;
964
		c->delivery_system = SYS_DVBC_ANNEX_AC;
965 966
		break;
	case FE_OFDM:
967 968 969 970 971 972 973 974 975
		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;
976 977 978 979 980 981
		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;
982
		c->delivery_system = SYS_DVBT;
983 984 985
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
986 987 988 989
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
990 991 992 993
		break;
	}
}

994 995 996 997
/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the advanced tuning API.
 */
void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
998
{
999 1000 1001
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1002

1003 1004
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1005

1006 1007
	switch (fe->ops.info.type) {
	case FE_QPSK:
1008
		dprintk("%s() Preparing QPSK req\n", __func__);
1009 1010
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1011
		c->delivery_system = SYS_DVBS;
1012 1013
		break;
	case FE_QAM:
1014
		dprintk("%s() Preparing QAM req\n", __func__);
1015 1016 1017
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1018
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1019 1020
		break;
	case FE_OFDM:
1021
		dprintk("%s() Preparing OFDM req\n", __func__);
1022 1023 1024 1025 1026 1027 1028 1029
		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;
1030 1031 1032 1033 1034 1035
		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;
1036
		c->delivery_system = SYS_DVBT;
1037 1038
		break;
	case FE_ATSC:
1039
		dprintk("%s() Preparing VSB req\n", __func__);
1040
		p->u.vsb.modulation = c->modulation;
1041 1042 1043 1044
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1045 1046 1047 1048 1049 1050 1051 1052 1053
		break;
	}
}

/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the legacy tuning API.
 */
void dtv_property_adv_params_sync(struct dvb_frontend *fe)
{
1054
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1055
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1056
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1057

1058 1059 1060 1061
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1062 1063
	case PSK_8:
	case APSK_16:
1064
	case APSK_32:
1065
	case QPSK:
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
		break;
	default:
		break;
	}

	if(c->delivery_system == SYS_ISDBT) {
		/* Fake out a generic DVB-T request so we pass validation in the ioctl */
		p->frequency = c->frequency;
		p->inversion = INVERSION_AUTO;
		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.bandwidth = BANDWIDTH_AUTO;
		p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
		p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
		p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
	}
}

void dtv_property_cache_submit(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	/* 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.
	 */
1095 1096
	if(is_legacy_delivery_system(c->delivery_system)) {

1097
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1098
		dtv_property_legacy_params_sync(fe);
1099 1100

	} else {
1101
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1102

1103 1104 1105 1106 1107 1108
		/* 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.
		 */
1109
		dtv_property_adv_params_sync(fe);
1110 1111 1112
	}
}

1113 1114 1115 1116 1117
static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
			unsigned int cmd, void *parg);
static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
			unsigned int cmd, void *parg);

1118 1119 1120 1121 1122 1123 1124
int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
	struct inode *inode, struct file *file)
{
	int r = 0;

	dtv_property_dump(tvp);

1125 1126 1127 1128 1129 1130 1131
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1132 1133 1134 1135 1136 1137 1138
	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;
1139 1140
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
		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;
1166 1167 1168
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1169 1170 1171 1172 1173 1174
	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;
1175 1176 1177 1178 1179 1180
	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;
1181 1182 1183
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1184 1185 1186 1187 1188 1189 1190 1191
	default:
		r = -1;
	}

	return r;
}

int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1192
	struct inode *inode, struct file *file)
1193 1194
{
	int r = 0;
1195
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1196
	dtv_property_dump(tvp);
1197

1198 1199 1200 1201 1202 1203 1204
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1205
	switch(tvp->cmd) {
1206
	case DTV_CLEAR:
1207 1208 1209
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1210
		dprintk("%s() Flushing property cache\n", __func__);
1211
		memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1212
		fe->dtv_property_cache.state = tvp->cmd;
1213
		fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1214
		break;
1215
	case DTV_TUNE:
1216
		/* interpret the cache of data, build either a traditional frontend
1217 1218
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1219
		 */
1220
		fe->dtv_property_cache.state = tvp->cmd;
1221
		dprintk("%s() Finalised property cache\n", __func__);
1222 1223
		dtv_property_cache_submit(fe);

1224 1225
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1226
		break;
1227
	case DTV_FREQUENCY:
1228
		fe->dtv_property_cache.frequency = tvp->u.data;
1229
		break;
1230
	case DTV_MODULATION:
1231
		fe->dtv_property_cache.modulation = tvp->u.data;
1232
		break;
1233 1234
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1235
		break;
1236
	case DTV_INVERSION:
1237
		fe->dtv_property_cache.inversion = tvp->u.data;
1238
		break;
1239
	case DTV_SYMBOL_RATE:
1240
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1241
		break;
1242
	case DTV_INNER_FEC:
1243
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1244
		break;
1245
	case DTV_PILOT:
1246
		fe->dtv_property_cache.pilot = tvp->u.data;
1247
		break;
1248
	case DTV_ROLLOFF:
1249
		fe->dtv_property_cache.rolloff = tvp->u.data;
1250
		break;
1251
	case DTV_DELIVERY_SYSTEM:
1252
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1253
		break;
1254
	case DTV_VOLTAGE:
1255
		fe->dtv_property_cache.voltage = tvp->u.data;
1256
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1257
			(void *)fe->dtv_property_cache.voltage);
1258
		break;
1259
	case DTV_TONE:
1260
		fe->dtv_property_cache.sectone = tvp->u.data;
1261
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1262
			(void *)fe->dtv_property_cache.sectone);
1263
		break;
1264 1265 1266 1267 1268 1269
	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;
1270 1271 1272 1273 1274 1275
	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;
1276 1277 1278
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1279 1280
	default:
		r = -1;
1281 1282
	}

1283
	return r;
1284 1285
}

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1286 1287 1288 1289 1290
static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1291
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1292 1293
	int err = -EOPNOTSUPP;

1294
	dprintk ("%s\n", __func__);
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1295

1296
	if (fepriv->exit)
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		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;

1307 1308
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1309 1310
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1311
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1312
	}
1313 1314 1315 1316 1317 1318 1319 1320 1321 1322

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

static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1323
	int err = 0;
1324 1325 1326 1327

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1328 1329 1330

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

1331
	if(cmd == FE_SET_PROPERTY) {
1332
		tvps = (struct dtv_properties __user *)parg;
1333

1334 1335
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1336 1337 1338

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1339
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1340 1341 1342 1343 1344 1345 1346
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1347 1348
		}

1349 1350 1351 1352 1353
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1354 1355 1356 1357
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1358

1359 1360
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1361

1362 1363 1364 1365 1366
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1367 1368
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1369 1370 1371

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1372
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386
			return -EINVAL;

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

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

1387 1388 1389 1390
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1391 1392 1393 1394 1395 1396 1397 1398 1399

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

	} else
		err = -EOPNOTSUPP;

1400 1401
out:
	kfree(tvp);
1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412
	return err;
}

static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
			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;
	int err = -EOPNOTSUPP;

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1413 1414
	switch (cmd) {
	case FE_GET_INFO: {
1415
		struct dvb_frontend_info* info = parg;
1416
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1417
		dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
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		/* 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;
	}

1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436
	case FE_READ_STATUS: {
		fe_status_t* status = parg;

		/* if retune was requested but hasn't occured yet, prevent
		 * that user get signal state from previous tuning */
		if(fepriv->state == FESTATE_RETUNE) {
			err=0;
			*status = 0;
			break;
		}

1437 1438
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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		break;
1440
	}
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1441
	case FE_READ_BER:
1442 1443
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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1444 1445 1446
		break;

	case FE_READ_SIGNAL_STRENGTH:
1447 1448
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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		break;

	case FE_READ_SNR:
1452 1453
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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1454 1455 1456
		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1457 1458
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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		break;


	case FE_DISEQC_RESET_OVERLOAD:
1463 1464
		if (fe->ops.diseqc_reset_overload) {
			err = fe->ops.diseqc_reset_overload(fe);
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1465 1466 1467 1468 1469 1470
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_MASTER_CMD:
1471 1472
		if (fe->ops.diseqc_send_master_cmd) {
			err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_BURST:
1479 1480
		if (fe->ops.diseqc_send_burst) {
			err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_TONE:
1487 1488
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1489
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1496 1497
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1498
			fepriv->voltage = (fe_sec_voltage_t) parg;
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISHNETWORK_SEND_LEGACY_CMD:
1505 1506
		if (fe->ops.dishnetwork_send_legacy_command) {
			err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
1509
		} else if (fe->ops.set_voltage) {
1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525
			/*
			 * 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
			 * other frontends, the following shoule work ok.
			 * Dish network legacy switches (as used by Dish500)
			 * are controlled by sending 9-bit command words
			 * spaced 8msec apart.
			 * the actual command word is switch/port dependant
			 * 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
			 */
1526
			unsigned long swcmd = ((unsigned long) parg) << 1;
1527 1528 1529 1530 1531
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1532
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1533 1534 1535 1536 1537 1538
			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
			 */
1539
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1540 1541 1542 1543 1544
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1545
				if ((swcmd & 0x01) != last) {
1546
					/* set voltage to (last ? 13V : 18V) */
1547
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1548 1549
					last = (last) ? 0 : 1;
				}
1550
				swcmd = swcmd >> 1;
1551 1552 1553 1554 1555
				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",
1556
					__func__, fe->dvb->num);
1557 1558 1559 1560 1561 1562
				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;
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		}
		break;

	case FE_DISEQC_RECV_SLAVE_REPLY:
1567 1568
		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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		break;

	case FE_ENABLE_HIGH_LNB_VOLTAGE:
1572 1573
		if (fe->ops.enable_high_lnb_voltage)
			err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
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		break;

	case FE_SET_FRONTEND: {
		struct dvb_frontend_tune_settings fetunesettings;

1579
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1580 1581 1582 1583 1584 1585 1586 1587 1588
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1589

1590 1591
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1592
			dtv_property_cache_sync(fe, &fepriv->parameters);
1593
		}
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		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;
		}
1604
		if (fe->ops.info.type == FE_OFDM) {
1605
			/* without hierarchical coding code_rate_LP is irrelevant,
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			 * 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 */
1613
		if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
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			fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
			fepriv->max_drift = fetunesettings.max_drift;
			fepriv->step_size = fetunesettings.step_size;
		} else {
			/* default values */
1619
			switch(fe->ops.info.type) {
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			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;
1634 1635
				fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
				fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
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				break;
			case FE_ATSC:
1638 1639 1640
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0;
				fepriv->max_drift = 0;
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				break;
			}
		}
		if (dvb_override_tune_delay > 0)
			fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;

		fepriv->state = FESTATE_RETUNE;
		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:
1660
		if (fe->ops.get_frontend) {
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			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1662
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
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		}
		break;
1665 1666

	case FE_SET_FRONTEND_TUNE_MODE:
1667
		fepriv->tune_mode_flags = (unsigned long) parg;
1668
		err = 0;
1669
		break;
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	};

	return err;
}

1675

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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;
1680
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1681

1682
	dprintk ("%s\n", __func__);
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	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;
1696
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1697
	struct dvb_adapter *adapter = fe->dvb;
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	int ret;

1700
	dprintk ("%s\n", __func__);
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1702 1703
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722

		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;
1723
				}
1724 1725 1726 1727
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
1728 1729 1730
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
1731 1732 1733 1734
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
1735
				}
1736
				adapter->mfe_dvbdev = dvbdev;
1737 1738 1739 1740
			}
		}
	}

1741 1742
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1743
			goto err0;
1744 1745
	}

1746 1747
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1748

1749
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1750 1751 1752 1753 1754
		/* normal tune mode when opened R/W */
		fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
		fepriv->tone = -1;
		fepriv->voltage = -1;

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		ret = dvb_frontend_start (fe);
		if (ret)
1757
			goto err2;
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		/*  empty event queue */
		fepriv->events.eventr = fepriv->events.eventw = 0;
	}

1763 1764
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
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	return ret;
1766 1767 1768 1769 1770 1771

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
1772 1773 1774
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
1775
	return ret;
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}

static int dvb_frontend_release(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1782
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1783
	int ret;
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1784

1785
	dprintk ("%s\n", __func__);
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	if ((file->f_flags & O_ACCMODE) != O_RDONLY)
		fepriv->release_jiffies = jiffies;

1790 1791
	ret = dvb_generic_release (inode, file);

1792 1793 1794 1795 1796 1797 1798 1799
	if (dvbdev->users == -1) {
		if (fepriv->exit == 1) {
			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);
1800
	}
1801

1802
	return ret;
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}

static struct file_operations dvb_frontend_fops = {
	.owner		= THIS_MODULE,
	.ioctl		= dvb_generic_ioctl,
	.poll		= dvb_frontend_poll,
	.open		= dvb_frontend_open,
	.release	= dvb_frontend_release
};

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
	};

1825
	dprintk ("%s\n", __func__);
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1827
	if (mutex_lock_interruptible(&frontend_mutex))
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		return -ERESTARTSYS;

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	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
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	if (fe->frontend_priv == NULL) {
1832
		mutex_unlock(&frontend_mutex);
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		return -ENOMEM;
	}
1835
	fepriv = fe->frontend_priv;
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	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
1840
	mutex_init(&fepriv->events.mtx);
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	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

1844
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
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		fe->dvb->num,
1846
		fe->id,
1847
		fe->ops.info.name);
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	dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
			     fe, DVB_DEVICE_FRONTEND);

1852
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
1859
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1860
	dprintk ("%s\n", __func__);
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1862
	mutex_lock(&frontend_mutex);
1863
	dvb_frontend_stop (fe);
1864 1865 1866 1867 1868 1869
	mutex_unlock(&frontend_mutex);

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

1870
	mutex_lock(&frontend_mutex);
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	dvb_unregister_device (fepriv->dvbdev);
1872

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	/* fe is invalid now */
	kfree(fepriv);
1875
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
1879

1880
#ifdef CONFIG_MEDIA_ATTACH
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892
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);
	}
1893 1894 1895 1896
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
	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);
1910 1911
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
1912 1913 1914 1915 1916
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);