dvb_frontend.c 47.5 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"

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)
{
	dprintk ("DVB: initialising frontend %i (%s)...\n",
		 fe->dvb->num,
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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;
				}
571 572
			} else
				dvb_frontend_swzigzag(fe);
573 574
		} else
			dvb_frontend_swzigzag(fe);
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	}

577 578 579
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
580 581 582 583
		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);
584
		}
585 586
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

589
	fepriv->thread = NULL;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
598
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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600
	dprintk ("%s\n", __func__);
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	fepriv->exit = 1;
	mb();

605
	if (!fepriv->thread)
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		return;

608
	kthread_stop(fepriv->thread);
609

610
	init_MUTEX (&fepriv->sem);
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	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
614 615 616
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661
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;
665
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
666
	struct task_struct *fe_thread;
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668
	dprintk ("%s\n", __func__);
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670
	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;
684
	fepriv->thread = NULL;
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	mb();

687 688 689 690 691
	fe_thread = kthread_run(dvb_frontend_thread, fe,
		"kdvb-fe-%i", fe->dvb->num);
	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;
	}
695
	fepriv->thread = fe_thread;
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	return 0;
}

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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)
		printk(KERN_WARNING "DVB: frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num);
}

716 717 718
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
719 720 721
	u32 freq_min;
	u32 freq_max;

722
	/* range check: frequency */
723 724 725
	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
726
		printk(KERN_WARNING "DVB: frontend %u frequency %u out of range (%u..%u)\n",
727
		       fe->dvb->num, parms->frequency, freq_min, freq_max);
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757
		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)) {
			printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n",
			       fe->dvb->num, parms->u.qpsk.symbol_rate,
			       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)) {
			printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n",
			       fe->dvb->num, parms->u.qam.symbol_rate,
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

	return 0;
}

758
struct dtv_cmds_h dtv_cmds[] = {
759 760 761
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
762 763
		.set	= 1,
	},
764 765 766
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
767 768 769 770
		.set	= 1,
	},

	/* Set */
771 772 773
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
774 775
		.set	= 1,
	},
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	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
779 780
		.set	= 1,
	},
781 782 783
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
784 785
		.set	= 1,
	},
786 787 788
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
789 790
		.set	= 1,
	},
791 792 793
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
794 795 796
		.set	= 1,
		.buffer	= 1,
	},
797 798 799
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
800 801
		.set	= 1,
	},
802 803 804
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
805 806
		.set	= 1,
	},
807 808 809
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
810 811
		.set	= 1,
	},
812 813 814
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
815 816
		.set	= 1,
	},
817 818 819
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
820 821
		.set	= 1,
	},
822 823 824
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
825 826
		.set	= 1,
	},
827 828 829
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
830 831 832
		.set	= 1,
	},
	/* Get */
833 834 835
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
836 837 838 839 840
		.set	= 0,
		.buffer	= 1,
	},
};

841
void dtv_property_dump(struct dtv_property *tvp)
842 843 844 845 846 847
{
	int i;

	printk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__FUNCTION__
		,tvp->cmd
848
		,dtv_cmds[ tvp->cmd ].name);
849

850
	if(dtv_cmds[ tvp->cmd ].buffer) {
851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874

		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;
}

875 876 877 878 879 880 881 882
/* 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;

883 884
	printk("%s()\n", __FUNCTION__);

885 886 887 888 889 890 891
	c->frequency = p->frequency;
	c->inversion = p->inversion;

	switch (fe->ops.info.type) {
	case FE_QPSK:
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
892
		c->delivery_system = SYS_DVBS;
893 894 895 896 897
		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;
898
		c->delivery_system = SYS_DVBC_ANNEX_AC;
899 900
		break;
	case FE_OFDM:
901 902 903 904 905 906 907 908 909
		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;
910 911 912 913 914 915
		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;
916
		c->delivery_system = SYS_DVBT;
917 918 919
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
920 921 922 923
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
924 925 926 927
		break;
	}
}

928 929 930 931
/* 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)
932
{
933 934 935
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
936

937
	printk("%s()\n", __FUNCTION__);
938

939 940
	p->frequency = c->frequency;
	p->inversion = c->inversion;
941

942 943 944 945 946
	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;
947
		c->delivery_system = SYS_DVBS;
948 949 950 951 952 953
		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;
954
		c->delivery_system = SYS_DVBC_ANNEX_AC;
955 956 957
		break;
	case FE_OFDM:
		printk("%s() Preparing OFDM req\n", __FUNCTION__);
958 959 960 961 962 963 964 965
		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;
966 967 968 969 970 971
		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;
972
		c->delivery_system = SYS_DVBT;
973 974 975 976
		break;
	case FE_ATSC:
		printk("%s() Preparing VSB req\n", __FUNCTION__);
		p->u.vsb.modulation = c->modulation;
977 978 979 980
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
981 982 983 984 985 986 987 988 989
		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)
{
990
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
991
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
992
	struct dvb_frontend_parameters *p = &fepriv->parameters;
993 994 995

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

996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
	case _8PSK:
	case _16APSK:
	case NBC_QPSK:
		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.
	 */
1034 1035
	if(is_legacy_delivery_system(c->delivery_system)) {

1036 1037
		printk("%s() legacy, modulation = %d\n", __FUNCTION__, c->modulation);
		dtv_property_legacy_params_sync(fe);
1038 1039

	} else {
1040 1041
		printk("%s() adv, modulation = %d\n", __FUNCTION__, c->modulation);

1042 1043 1044 1045 1046 1047
		/* 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.
		 */
1048
		dtv_property_adv_params_sync(fe);
1049 1050 1051
	}
}

1052 1053 1054 1055 1056
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);

1057 1058 1059 1060 1061 1062 1063 1064 1065
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);

1066 1067 1068 1069 1070 1071 1072
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1073 1074 1075 1076 1077 1078 1079
	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;
1080 1081
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
		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;
	default:
		r = -1;
	}

	return r;
}

int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1115
	struct inode *inode, struct file *file)
1116 1117
{
	int r = 0;
1118
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1119
	printk("%s()\n", __FUNCTION__);
1120
	dtv_property_dump(tvp);
1121

1122 1123 1124 1125 1126 1127 1128
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1129
	switch(tvp->cmd) {
1130
	case DTV_CLEAR:
1131 1132 1133 1134
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
		printk("%s() Flushing property cache\n", __FUNCTION__);
1135
		memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1136
		fe->dtv_property_cache.state = tvp->cmd;
1137
		fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1138
		break;
1139
	case DTV_TUNE:
1140
		/* interpret the cache of data, build either a traditional frontend
1141 1142
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1143
		 */
1144
		fe->dtv_property_cache.state = tvp->cmd;
1145
		printk("%s() Finalised property cache\n", __FUNCTION__);
1146 1147
		dtv_property_cache_submit(fe);

1148 1149
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1150
		break;
1151
	case DTV_FREQUENCY:
1152
		fe->dtv_property_cache.frequency = tvp->u.data;
1153
		break;
1154
	case DTV_MODULATION:
1155
		fe->dtv_property_cache.modulation = tvp->u.data;
1156
		break;
1157 1158
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1159
		break;
1160
	case DTV_INVERSION:
1161
		fe->dtv_property_cache.inversion = tvp->u.data;
1162
		break;
1163
	case DTV_SYMBOL_RATE:
1164
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1165
		break;
1166
	case DTV_INNER_FEC:
1167
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1168
		break;
1169
	case DTV_PILOT:
1170
		fe->dtv_property_cache.pilot = tvp->u.data;
1171
		break;
1172
	case DTV_ROLLOFF:
1173
		fe->dtv_property_cache.rolloff = tvp->u.data;
1174
		break;
1175
	case DTV_DELIVERY_SYSTEM:
1176
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1177
		break;
1178
	case DTV_VOLTAGE:
1179
		fe->dtv_property_cache.voltage = tvp->u.data;
1180
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1181
			(void *)fe->dtv_property_cache.voltage);
1182
		break;
1183
	case DTV_TONE:
1184
		fe->dtv_property_cache.sectone = tvp->u.data;
1185
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1186
			(void *)fe->dtv_property_cache.sectone);
1187
		break;
1188 1189
	default:
		r = -1;
1190 1191
	}

1192
	return r;
1193 1194
}

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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;
1200
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	int err = -EOPNOTSUPP;

1203
	dprintk ("%s\n", __func__);
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1204

1205
	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;

1216 1217
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1218 1219
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1220
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1221
	}
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231

	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;
1232
	int err = 0;
1233 1234 1235 1236

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1237 1238 1239

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

1240 1241 1242
	if(cmd == FE_SET_PROPERTY) {
		printk("%s() FE_SET_PROPERTY\n", __FUNCTION__);

1243
		tvps = (struct dtv_properties __user *)parg;
1244

1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257
		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 */
		if (tvps->num > DTV_IOCTL_MAX_MSGS)
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1258 1259
		}

1260 1261 1262 1263 1264 1265
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

		for (i = 0; i < tvps->num; i++)
1266
			err |= dtv_property_process_set(fe, tvp + i, inode, file);
1267 1268

		if(fe->dtv_property_cache.state == DTV_TUNE) {
1269 1270
			printk("%s() Property cache is full, tuning\n", __FUNCTION__);
		}
1271

1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
	} 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 */
		if (tvps->num > DTV_IOCTL_MAX_MSGS)
			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;
		}

		for (i = 0; i < tvps->num; i++)
1299
			err |= dtv_property_process_get(fe, tvp + i, inode, file);
1300 1301 1302 1303 1304 1305 1306 1307 1308

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

	} else
		err = -EOPNOTSUPP;

1309 1310
out:
	kfree(tvp);
1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321
	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: {
1324
		struct dvb_frontend_info* info = parg;
1325
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1326
		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;
	}

1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345
	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;
		}

1346 1347
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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		break;
1349
	}
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	case FE_READ_BER:
1351 1352
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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		break;

	case FE_READ_SIGNAL_STRENGTH:
1356 1357
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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		break;

	case FE_READ_SNR:
1361 1362
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1366 1367
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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		break;


	case FE_DISEQC_RESET_OVERLOAD:
1372 1373
		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:
1380 1381
		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:
1388 1389
		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:
1396 1397
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1398
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1405 1406
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1407
			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:
1414 1415
		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;
1418
		} else if (fe->ops.set_voltage) {
1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
			/*
			 * 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
			 */
1435
			unsigned long swcmd = ((unsigned long) parg) << 1;
1436 1437 1438 1439 1440
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1441
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1442 1443 1444 1445 1446 1447
			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
			 */
1448
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1449 1450 1451 1452 1453
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1454
				if ((swcmd & 0x01) != last) {
1455
					/* set voltage to (last ? 13V : 18V) */
1456
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1457 1458
					last = (last) ? 0 : 1;
				}
1459
				swcmd = swcmd >> 1;
1460 1461 1462 1463 1464
				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",
1465
					__func__, fe->dvb->num);
1466 1467 1468 1469 1470 1471
				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:
1476 1477
		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:
1481 1482
		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;

1488
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1489 1490 1491 1492 1493 1494 1495 1496 1497
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1498

1499 1500
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1501
			dtv_property_cache_sync(fe, &fepriv->parameters);
1502
		}
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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;
		}
1513
		if (fe->ops.info.type == FE_OFDM) {
1514
			/* 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 */
1522
		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 */
1528
			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;
1543 1544
				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:
1547 1548 1549
				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:
1569
		if (fe->ops.get_frontend) {
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			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1571
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
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		}
		break;
1574 1575

	case FE_SET_FRONTEND_TUNE_MODE:
1576
		fepriv->tune_mode_flags = (unsigned long) parg;
1577
		err = 0;
1578
		break;
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	};

	return err;
}

1584

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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;
1589
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1591
	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;
1605
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	int ret;

1608
	dprintk ("%s\n", __func__);
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1610 1611
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1612 1613 1614
			return ret;
	}

1615 1616
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1617

1618
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1619 1620 1621 1622 1623
		/* normal tune mode when opened R/W */
		fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
		fepriv->tone = -1;
		fepriv->voltage = -1;

L
Linus Torvalds 已提交
1624 1625
		ret = dvb_frontend_start (fe);
		if (ret)
1626
			goto err2;
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1627 1628 1629 1630 1631 1632

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

	return ret;
1633 1634 1635 1636 1637 1638 1639

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;
L
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1640 1641 1642 1643 1644 1645
}

static int dvb_frontend_release(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1646
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1647
	int ret;
L
Linus Torvalds 已提交
1648

1649
	dprintk ("%s\n", __func__);
L
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1650 1651 1652 1653

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

1654 1655
	ret = dvb_generic_release (inode, file);

1656 1657 1658 1659 1660 1661 1662 1663
	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);
1664
	}
1665

1666
	return ret;
L
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1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688
}

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
	};

1689
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1690

1691
	if (mutex_lock_interruptible(&frontend_mutex))
L
Linus Torvalds 已提交
1692 1693
		return -ERESTARTSYS;

P
 
Panagiotis Issaris 已提交
1694
	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
L
Linus Torvalds 已提交
1695
	if (fe->frontend_priv == NULL) {
1696
		mutex_unlock(&frontend_mutex);
L
Linus Torvalds 已提交
1697 1698
		return -ENOMEM;
	}
1699
	fepriv = fe->frontend_priv;
L
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1700 1701 1702 1703

	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
1704
	mutex_init(&fepriv->events.mtx);
L
Linus Torvalds 已提交
1705 1706 1707 1708 1709
	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

	printk ("DVB: registering frontend %i (%s)...\n",
		fe->dvb->num,
1710
		fe->ops.info.name);
L
Linus Torvalds 已提交
1711 1712 1713 1714

	dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
			     fe, DVB_DEVICE_FRONTEND);

1715
	mutex_unlock(&frontend_mutex);
L
Linus Torvalds 已提交
1716 1717 1718 1719 1720 1721
	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
1722
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1723
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1724

1725
	mutex_lock(&frontend_mutex);
1726
	dvb_frontend_stop (fe);
1727 1728 1729 1730 1731 1732
	mutex_unlock(&frontend_mutex);

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

1733
	mutex_lock(&frontend_mutex);
L
Linus Torvalds 已提交
1734
	dvb_unregister_device (fepriv->dvbdev);
1735

L
Linus Torvalds 已提交
1736 1737
	/* fe is invalid now */
	kfree(fepriv);
1738
	mutex_unlock(&frontend_mutex);
L
Linus Torvalds 已提交
1739 1740 1741
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
1742

1743
#ifdef CONFIG_MEDIA_ATTACH
1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
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);
	}
1756 1757 1758 1759
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
	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);
1773 1774
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
1775 1776 1777 1778 1779
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);