dvb_frontend.c 50.1 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>
#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;

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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#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 */
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		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;
				}
573 574
			} else
				dvb_frontend_swzigzag(fe);
575 576
		} else
			dvb_frontend_swzigzag(fe);
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	}

579 580 581
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
582 583 584 585
		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);
586
		}
587 588
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

591
	fepriv->thread = NULL;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
600
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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602
	dprintk ("%s\n", __func__);
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603 604 605 606

	fepriv->exit = 1;
	mb();

607
	if (!fepriv->thread)
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		return;

610
	kthread_stop(fepriv->thread);
611

612
	init_MUTEX (&fepriv->sem);
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613 614 615
	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
616 617 618
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663
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;
667
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
668
	struct task_struct *fe_thread;
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669

670
	dprintk ("%s\n", __func__);
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671

672
	if (fepriv->thread) {
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		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;
686
	fepriv->thread = NULL;
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	mb();

689
	fe_thread = kthread_run(dvb_frontend_thread, fe,
690
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
691 692 693
	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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		up(&fepriv->sem);
		return ret;
	}
697
	fepriv->thread = fe_thread;
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	return 0;
}

701 702 703 704 705 706 707 708 709 710 711 712 713
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)
714 715
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
716 717
}

718 719 720
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
721 722 723
	u32 freq_min;
	u32 freq_max;

724
	/* range check: frequency */
725 726 727
	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
728 729
		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);
730 731 732 733 734 735 736 737 738
		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)) {
739 740
			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,
741 742 743 744 745 746 747 748 749
			       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)) {
750 751
			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,
752 753 754 755 756 757 758 759
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

	return 0;
}

760
struct dtv_cmds_h dtv_cmds[] = {
761 762 763
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
764 765
		.set	= 1,
	},
766 767 768
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
769 770 771 772
		.set	= 1,
	},

	/* Set */
773 774 775
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
776 777
		.set	= 1,
	},
778 779 780
	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
781 782
		.set	= 1,
	},
783 784 785
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
786 787
		.set	= 1,
	},
788 789 790
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
791 792
		.set	= 1,
	},
793 794 795
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
796 797 798
		.set	= 1,
		.buffer	= 1,
	},
799 800 801
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
802 803
		.set	= 1,
	},
804 805 806
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
807 808
		.set	= 1,
	},
809 810 811
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
812 813
		.set	= 1,
	},
814 815 816
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
817 818
		.set	= 1,
	},
819 820 821
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
822 823
		.set	= 1,
	},
824 825 826
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
827 828
		.set	= 1,
	},
829 830 831
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
832 833
		.set	= 1,
	},
834 835 836 837 838
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 1,
	},
839 840 841 842 843 844 845 846 847 848
	[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,
	},
849 850 851 852 853 854 855 856 857 858
	[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,
	},
859
	/* Get */
860 861 862
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
863 864 865
		.set	= 0,
		.buffer	= 1,
	},
866 867 868 869 870
	[DTV_API_VERSION] = {
		.name	= "DTV_API_VERSION",
		.cmd	= DTV_API_VERSION,
		.set	= 0,
	},
871 872 873 874 875 876 877 878 879 880
	[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,
	},
881 882 883 884 885 886 887 888 889 890
	[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,
	},
891 892 893 894 895
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 0,
	},
896 897
};

898
void dtv_property_dump(struct dtv_property *tvp)
899 900 901
{
	int i;

902
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
903 904 905 906 907
		printk("%s: tvp.cmd = 0x%08x (undefined/unknown/invalid)\n",
			__func__, tvp->cmd);
		return;
	}

908 909 910
	printk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__FUNCTION__
		,tvp->cmd
911
		,dtv_cmds[ tvp->cmd ].name);
912

913
	if(dtv_cmds[ tvp->cmd ].buffer) {
914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937

		printk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__FUNCTION__
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
			printk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__FUNCTION__
				,i
				,tvp->u.buffer.data[i]);

	} else
		printk("%s() tvp.u.data = 0x%08x\n", __FUNCTION__, tvp->u.data);
}

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;
}

938 939 940 941 942 943 944 945
/* 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;

946 947
	printk("%s()\n", __FUNCTION__);

948 949 950 951 952
	c->frequency = p->frequency;
	c->inversion = p->inversion;

	switch (fe->ops.info.type) {
	case FE_QPSK:
953 954
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
955 956
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
957
		c->delivery_system = SYS_DVBS;
958 959 960 961 962
		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;
963
		c->delivery_system = SYS_DVBC_ANNEX_AC;
964 965
		break;
	case FE_OFDM:
966 967 968 969 970 971 972 973 974
		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;
975 976 977 978 979 980
		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;
981
		c->delivery_system = SYS_DVBT;
982 983 984
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
985 986 987 988
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
989 990 991 992
		break;
	}
}

993 994 995 996
/* 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)
997
{
998 999 1000
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1001

1002
	printk("%s()\n", __FUNCTION__);
1003

1004 1005
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1006

1007 1008 1009 1010 1011
	switch (fe->ops.info.type) {
	case FE_QPSK:
		printk("%s() Preparing QPSK req\n", __FUNCTION__);
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1012
		c->delivery_system = SYS_DVBS;
1013 1014 1015 1016 1017 1018
		break;
	case FE_QAM:
		printk("%s() Preparing QAM req\n", __FUNCTION__);
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1019
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1020 1021 1022
		break;
	case FE_OFDM:
		printk("%s() Preparing OFDM req\n", __FUNCTION__);
1023 1024 1025 1026 1027 1028 1029 1030
		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;
1031 1032 1033 1034 1035 1036
		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;
1037
		c->delivery_system = SYS_DVBT;
1038 1039 1040 1041
		break;
	case FE_ATSC:
		printk("%s() Preparing VSB req\n", __FUNCTION__);
		p->u.vsb.modulation = c->modulation;
1042 1043 1044 1045
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1046 1047 1048 1049 1050 1051 1052 1053 1054
		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)
{
1055
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1056
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1057
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1058 1059 1060

	printk("%s()\n", __FUNCTION__);

1061 1062 1063 1064
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1065 1066
	case PSK_8:
	case APSK_16:
1067
	case APSK_32:
1068
	case QPSK:
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 1095 1096 1097 1098 1099
		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;

	printk("%s()\n", __FUNCTION__);

	/* 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.
	 */
1100 1101
	if(is_legacy_delivery_system(c->delivery_system)) {

1102 1103
		printk("%s() legacy, modulation = %d\n", __FUNCTION__, c->modulation);
		dtv_property_legacy_params_sync(fe);
1104 1105

	} else {
1106 1107
		printk("%s() adv, modulation = %d\n", __FUNCTION__, c->modulation);

1108 1109 1110 1111 1112 1113
		/* 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.
		 */
1114
		dtv_property_adv_params_sync(fe);
1115 1116 1117
	}
}

1118 1119 1120 1121 1122
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);

1123 1124 1125 1126 1127 1128 1129 1130 1131
int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
	struct inode *inode, struct file *file)
{
	int r = 0;

	printk("%s()\n", __FUNCTION__);

	dtv_property_dump(tvp);

1132 1133 1134 1135 1136 1137 1138
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1139 1140 1141 1142 1143 1144 1145
	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;
1146 1147
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
		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;
1173 1174 1175
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1176 1177 1178 1179 1180 1181
	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;
1182 1183 1184 1185 1186 1187
	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;
1188 1189 1190
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1191 1192 1193 1194 1195 1196 1197 1198
	default:
		r = -1;
	}

	return r;
}

int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1199
	struct inode *inode, struct file *file)
1200 1201
{
	int r = 0;
1202
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1203
	printk("%s()\n", __FUNCTION__);
1204
	dtv_property_dump(tvp);
1205

1206 1207 1208 1209 1210 1211 1212
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1213
	switch(tvp->cmd) {
1214
	case DTV_CLEAR:
1215 1216 1217 1218
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
		printk("%s() Flushing property cache\n", __FUNCTION__);
1219
		memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1220
		fe->dtv_property_cache.state = tvp->cmd;
1221
		fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1222
		break;
1223
	case DTV_TUNE:
1224
		/* interpret the cache of data, build either a traditional frontend
1225 1226
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1227
		 */
1228
		fe->dtv_property_cache.state = tvp->cmd;
1229
		printk("%s() Finalised property cache\n", __FUNCTION__);
1230 1231
		dtv_property_cache_submit(fe);

1232 1233
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1234
		break;
1235
	case DTV_FREQUENCY:
1236
		fe->dtv_property_cache.frequency = tvp->u.data;
1237
		break;
1238
	case DTV_MODULATION:
1239
		fe->dtv_property_cache.modulation = tvp->u.data;
1240
		break;
1241 1242
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1243
		break;
1244
	case DTV_INVERSION:
1245
		fe->dtv_property_cache.inversion = tvp->u.data;
1246
		break;
1247
	case DTV_SYMBOL_RATE:
1248
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1249
		break;
1250
	case DTV_INNER_FEC:
1251
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1252
		break;
1253
	case DTV_PILOT:
1254
		fe->dtv_property_cache.pilot = tvp->u.data;
1255
		break;
1256
	case DTV_ROLLOFF:
1257
		fe->dtv_property_cache.rolloff = tvp->u.data;
1258
		break;
1259
	case DTV_DELIVERY_SYSTEM:
1260
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1261
		break;
1262
	case DTV_VOLTAGE:
1263
		fe->dtv_property_cache.voltage = tvp->u.data;
1264
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1265
			(void *)fe->dtv_property_cache.voltage);
1266
		break;
1267
	case DTV_TONE:
1268
		fe->dtv_property_cache.sectone = tvp->u.data;
1269
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1270
			(void *)fe->dtv_property_cache.sectone);
1271
		break;
1272 1273 1274 1275 1276 1277
	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;
1278 1279 1280 1281 1282 1283
	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;
1284 1285 1286
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1287 1288
	default:
		r = -1;
1289 1290
	}

1291
	return r;
1292 1293
}

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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;
1299
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1300 1301
	int err = -EOPNOTSUPP;

1302
	dprintk ("%s\n", __func__);
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1303

1304
	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;

1315 1316
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1317 1318
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1319
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1320
	}
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330

	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;
1331
	int err = 0;
1332 1333 1334 1335

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1336 1337 1338

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

1339 1340 1341
	if(cmd == FE_SET_PROPERTY) {
		printk("%s() FE_SET_PROPERTY\n", __FUNCTION__);

1342
		tvps = (struct dtv_properties __user *)parg;
1343

1344 1345 1346 1347 1348
		printk("%s() properties.num = %d\n", __FUNCTION__, tvps->num);
		printk("%s() properties.props = %p\n", __FUNCTION__, tvps->props);

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1349
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1350 1351 1352 1353 1354 1355 1356
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1357 1358
		}

1359 1360 1361 1362 1363
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1364 1365 1366 1367
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1368 1369

		if(fe->dtv_property_cache.state == DTV_TUNE) {
1370 1371
			printk("%s() Property cache is full, tuning\n", __FUNCTION__);
		}
1372

1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
	} else
	if(cmd == FE_GET_PROPERTY) {
		printk("%s() FE_GET_PROPERTY\n", __FUNCTION__);

		tvps = (struct dtv_properties __user *)parg;

		printk("%s() properties.num = %d\n", __FUNCTION__, tvps->num);
		printk("%s() properties.props = %p\n", __FUNCTION__, tvps->props);

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1384
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398
			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;
		}

1399 1400 1401 1402
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1403 1404 1405 1406 1407 1408 1409 1410 1411

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

	} else
		err = -EOPNOTSUPP;

1412 1413
out:
	kfree(tvp);
1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424
	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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	switch (cmd) {
	case FE_GET_INFO: {
1427
		struct dvb_frontend_info* info = parg;
1428
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1429
		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;
	}

1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448
	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;
		}

1449 1450
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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		break;
1452
	}
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	case FE_READ_BER:
1454 1455
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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		break;

	case FE_READ_SIGNAL_STRENGTH:
1459 1460
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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		break;

	case FE_READ_SNR:
1464 1465
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1469 1470
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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		break;


	case FE_DISEQC_RESET_OVERLOAD:
1475 1476
		if (fe->ops.diseqc_reset_overload) {
			err = fe->ops.diseqc_reset_overload(fe);
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_MASTER_CMD:
1483 1484
		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:
1491 1492
		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:
1499 1500
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1501
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1508 1509
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1510
			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:
1517 1518
		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;
1521
		} else if (fe->ops.set_voltage) {
1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537
			/*
			 * 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
			 */
1538
			unsigned long swcmd = ((unsigned long) parg) << 1;
1539 1540 1541 1542 1543
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1544
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1545 1546 1547 1548 1549 1550
			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
			 */
1551
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1552 1553 1554 1555 1556
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1557
				if ((swcmd & 0x01) != last) {
1558
					/* set voltage to (last ? 13V : 18V) */
1559
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1560 1561
					last = (last) ? 0 : 1;
				}
1562
				swcmd = swcmd >> 1;
1563 1564 1565 1566 1567
				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",
1568
					__func__, fe->dvb->num);
1569 1570 1571 1572 1573 1574
				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:
1579 1580
		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:
1584 1585
		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;

1591
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1592 1593 1594 1595 1596 1597 1598 1599 1600
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1601

1602 1603
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1604
			dtv_property_cache_sync(fe, &fepriv->parameters);
1605
		}
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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;
		}
1616
		if (fe->ops.info.type == FE_OFDM) {
1617
			/* 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 */
1625
		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 */
1631
			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;
1646 1647
				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:
1650 1651 1652
				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:
1672
		if (fe->ops.get_frontend) {
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			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1674
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
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		}
		break;
1677 1678

	case FE_SET_FRONTEND_TUNE_MODE:
1679
		fepriv->tune_mode_flags = (unsigned long) parg;
1680
		err = 0;
1681
		break;
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	};

	return err;
}

1687

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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;
1692
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1693

1694
	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;
1708
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	int ret;

1711
	dprintk ("%s\n", __func__);
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1713 1714
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1715 1716 1717
			return ret;
	}

1718 1719
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1720

1721
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1722 1723 1724 1725 1726
		/* 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)
1729
			goto err2;
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		/*  empty event queue */
		fepriv->events.eventr = fepriv->events.eventw = 0;
	}

	return ret;
1736 1737 1738 1739 1740 1741 1742

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
	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;
1749
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1750
	int ret;
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1752
	dprintk ("%s\n", __func__);
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	if ((file->f_flags & O_ACCMODE) != O_RDONLY)
		fepriv->release_jiffies = jiffies;

1757 1758
	ret = dvb_generic_release (inode, file);

1759 1760 1761 1762 1763 1764 1765 1766
	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);
1767
	}
1768

1769
	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
	};

1792
	dprintk ("%s\n", __func__);
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1794
	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) {
1799
		mutex_unlock(&frontend_mutex);
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		return -ENOMEM;
	}
1802
	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);
1807
	mutex_init(&fepriv->events.mtx);
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	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

1811
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
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		fe->dvb->num,
1813
		fe->id,
1814
		fe->ops.info.name);
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	dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
			     fe, DVB_DEVICE_FRONTEND);

1819
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
1826
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1827
	dprintk ("%s\n", __func__);
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1829
	mutex_lock(&frontend_mutex);
1830
	dvb_frontend_stop (fe);
1831 1832 1833 1834 1835 1836
	mutex_unlock(&frontend_mutex);

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

1837
	mutex_lock(&frontend_mutex);
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	dvb_unregister_device (fepriv->dvbdev);
1839

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	/* fe is invalid now */
	kfree(fepriv);
1842
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
1846

1847
#ifdef CONFIG_MEDIA_ATTACH
1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
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);
	}
1860 1861 1862 1863
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876
	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);
1877 1878
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
1879 1880 1881 1882 1883
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);