dvb_frontend.c 53.0 KB
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/*
 * dvb_frontend.c: DVB frontend tuning interface/thread
 *
 *
 * Copyright (C) 1999-2001 Ralph  Metzler
 *			   Marcus Metzler
 *			   Holger Waechtler
 *				      for convergence integrated media GmbH
 *
 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 */

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

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

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

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static DEFINE_MUTEX(frontend_mutex);
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struct dvb_frontend_private {

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

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

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

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

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

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

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

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

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

	wake_up_interruptible (&events->wait_queue);
}

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

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

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

		if (flags & O_NONBLOCK)
			return -EWOULDBLOCK;

		up(&fepriv->sem);

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

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

		if (ret < 0)
			return ret;
	}

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

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

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

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

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

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

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

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

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

/**
 * Performs automatic twiddling of frontend parameters.
 *
 * @param fe The frontend concerned.
 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 * @returns Number of complete iterations that have been performed.
 */
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static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
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{
	int autoinversion;
	int ready = 0;
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	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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	enum dvbfe_algo algo;

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

	dvb_frontend_init(fe);
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	set_freezable();
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	while (1) {
		up(&fepriv->sem);	    /* is locked when we enter the thread... */
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restart:
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		timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
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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) {
561
				fe->ops.set_voltage(fe, fepriv->voltage);
562
			}
563 564 565
			fepriv->reinitialise = 0;
		}

566
		/* do an iteration of the tuning loop */
567
		if (fe->ops.get_frontend_algo) {
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568 569 570 571 572 573
			algo = fe->ops.get_frontend_algo(fe);
			switch (algo) {
			case DVBFE_ALGO_HW:
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
				params = NULL; /* have we been asked to RETUNE ? */

574
				if (fepriv->state & FESTATE_RETUNE) {
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					dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
576 577 578
					fepriv->state = FESTATE_TUNED;
				}

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

582
				if (s != fepriv->status) {
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					dprintk("%s: state changed, adding current state\n", __func__);
584 585 586
					dvb_frontend_add_event(fe, s);
					fepriv->status = s;
				}
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				break;
			case DVBFE_ALGO_SW:
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
590
				dvb_frontend_swzigzag(fe);
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591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631
				break;
			case DVBFE_ALGO_CUSTOM:
				params = NULL; /* have we been asked to RETUNE ?	*/
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
				if (fepriv->state & FESTATE_RETUNE) {
					dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
					fepriv->state = FESTATE_TUNED;
				}
				/* Case where we are going to search for a carrier
				 * User asked us to retune again for some reason, possibly
				 * requesting a search with a new set of parameters
				 */
				if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
					if (fe->ops.search)
						fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
						/* We did do a search as was requested, the flags are
						 * now unset as well and has the flags wrt to search.
						 */

					fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
				}
				/* Track the carrier if the search was successful */
				if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
					if (fepriv->algo_status & DVBFE_ALGO_SEARCH_SUCCESS)
						dprintk("%s: status = DVBFE_ALGO_SEARCH_SUCCESS\n", __func__);
					if (fepriv->algo_status & DVBFE_ALGO_SEARCH_FAILED)
						fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;

					fe->ops.read_status(fe, &s);
					dvb_frontend_add_event(fe, s); /* update event list */
					fepriv->status = s;
					if (fe->ops.track)
						fe->ops.track(fe, &fepriv->parameters);

				}
				break;
			default:
				dprintk("%s: UNDEFINED ALGO !\n", __func__);
				break;
			}
		} else {
632
			dvb_frontend_swzigzag(fe);
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		}
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	}

636 637 638
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
639
		if (fe->ops.tuner_ops.sleep) {
640 641
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 1);
642 643 644
			fe->ops.tuner_ops.sleep(fe);
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 0);
645
		}
646 647
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

650
	fepriv->thread = NULL;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
659
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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661
	dprintk ("%s\n", __func__);
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662 663 664 665

	fepriv->exit = 1;
	mb();

666
	if (!fepriv->thread)
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667 668
		return;

669
	kthread_stop(fepriv->thread);
670

671
	init_MUTEX (&fepriv->sem);
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	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
675 676 677
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722
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;
726
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
727
	struct task_struct *fe_thread;
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728

729
	dprintk ("%s\n", __func__);
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730

731
	if (fepriv->thread) {
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732 733 734 735 736 737 738 739 740 741 742 743 744
		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;
745
	fepriv->thread = NULL;
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746 747
	mb();

748
	fe_thread = kthread_run(dvb_frontend_thread, fe,
749
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
750 751 752
	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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753 754 755
		up(&fepriv->sem);
		return ret;
	}
756
	fepriv->thread = fe_thread;
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	return 0;
}

760 761 762 763 764 765 766 767 768 769 770 771 772
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)
773 774
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
775 776
}

777 778 779
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
780 781 782
	u32 freq_min;
	u32 freq_max;

783
	/* range check: frequency */
784 785 786
	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
787 788
		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);
789 790 791 792 793 794 795 796 797
		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)) {
798 799
			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,
800 801 802 803 804 805 806 807 808
			       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)) {
809 810
			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,
811 812 813 814 815 816 817 818
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

	return 0;
}

819
struct dtv_cmds_h dtv_cmds[] = {
820 821 822
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
823 824
		.set	= 1,
	},
825 826 827
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
828 829 830 831
		.set	= 1,
	},

	/* Set */
832 833 834
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
835 836
		.set	= 1,
	},
837 838 839
	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
840 841
		.set	= 1,
	},
842 843 844
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
845 846
		.set	= 1,
	},
847 848 849
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
850 851
		.set	= 1,
	},
852 853 854
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
855 856 857
		.set	= 1,
		.buffer	= 1,
	},
858 859 860
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
861 862
		.set	= 1,
	},
863 864 865
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
866 867
		.set	= 1,
	},
868 869 870
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
871 872
		.set	= 1,
	},
873 874 875
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
876 877
		.set	= 1,
	},
878 879 880
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
881 882
		.set	= 1,
	},
883 884 885
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
886 887
		.set	= 1,
	},
888 889 890
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
891 892
		.set	= 1,
	},
893 894 895 896 897
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 1,
	},
898 899 900 901 902 903 904 905 906 907
	[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,
	},
908 909 910 911 912 913 914 915 916 917
	[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,
	},
918
	/* Get */
919 920 921
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
922 923 924
		.set	= 0,
		.buffer	= 1,
	},
925 926 927 928 929
	[DTV_API_VERSION] = {
		.name	= "DTV_API_VERSION",
		.cmd	= DTV_API_VERSION,
		.set	= 0,
	},
930 931 932 933 934 935 936 937 938 939
	[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,
	},
940 941 942 943 944 945 946 947 948 949
	[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,
	},
950 951 952 953 954
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 0,
	},
955 956
};

957
void dtv_property_dump(struct dtv_property *tvp)
958 959 960
{
	int i;

961
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
962
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
963 964 965 966
			__func__, tvp->cmd);
		return;
	}

967 968
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
969
		,tvp->cmd
970
		,dtv_cmds[ tvp->cmd ].name);
971

972
	if(dtv_cmds[ tvp->cmd ].buffer) {
973

974 975
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
976 977 978
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
979 980
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
981 982 983 984
				,i
				,tvp->u.buffer.data[i]);

	} else
985
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
986 987 988 989 990
}

int is_legacy_delivery_system(fe_delivery_system_t s)
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
991 992
	   (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
	   (s == SYS_ATSC))
993 994 995 996 997
		return 1;

	return 0;
}

998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
/* Synchronise the legacy tuning parameters into the cache, so that demodulator
 * drivers can use a single set_frontend tuning function, regardless of whether
 * it's being used for the legacy or new API, reducing code and complexity.
 */
void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

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

	switch (fe->ops.info.type) {
	case FE_QPSK:
1011 1012
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1013 1014
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
1015
		c->delivery_system = SYS_DVBS;
1016 1017 1018 1019 1020
		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;
1021
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1022 1023
		break;
	case FE_OFDM:
1024 1025 1026 1027 1028 1029 1030 1031 1032
		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;
1033 1034 1035 1036 1037 1038
		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;
1039
		c->delivery_system = SYS_DVBT;
1040 1041 1042
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
1043 1044 1045 1046
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1047 1048 1049 1050
		break;
	}
}

1051 1052 1053 1054
/* 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)
1055
{
1056 1057 1058
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1059

1060 1061
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1062

1063 1064
	switch (fe->ops.info.type) {
	case FE_QPSK:
1065
		dprintk("%s() Preparing QPSK req\n", __func__);
1066 1067
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1068
		c->delivery_system = SYS_DVBS;
1069 1070
		break;
	case FE_QAM:
1071
		dprintk("%s() Preparing QAM req\n", __func__);
1072 1073 1074
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1075
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1076 1077
		break;
	case FE_OFDM:
1078
		dprintk("%s() Preparing OFDM req\n", __func__);
1079 1080 1081 1082 1083 1084 1085 1086
		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;
1087 1088 1089 1090 1091 1092
		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;
1093
		c->delivery_system = SYS_DVBT;
1094 1095
		break;
	case FE_ATSC:
1096
		dprintk("%s() Preparing VSB req\n", __func__);
1097
		p->u.vsb.modulation = c->modulation;
1098 1099 1100 1101
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1102 1103 1104 1105 1106 1107 1108 1109 1110
		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)
{
1111
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1112
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1113
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1114

1115 1116 1117 1118
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1119 1120
	case PSK_8:
	case APSK_16:
1121
	case APSK_32:
1122
	case QPSK:
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
		break;
	default:
		break;
	}

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

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

	/* For legacy delivery systems we don't need the delivery_system to
	 * be specified, but we populate the older structures from the cache
	 * so we can call set_frontend on older drivers.
	 */
1152 1153
	if(is_legacy_delivery_system(c->delivery_system)) {

1154
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1155
		dtv_property_legacy_params_sync(fe);
1156 1157

	} else {
1158
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1159

1160 1161 1162 1163 1164 1165
		/* 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.
		 */
1166
		dtv_property_adv_params_sync(fe);
1167 1168 1169
	}
}

1170 1171 1172 1173 1174
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);

1175 1176 1177 1178 1179 1180 1181
int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
	struct inode *inode, struct file *file)
{
	int r = 0;

	dtv_property_dump(tvp);

1182 1183 1184 1185 1186 1187 1188
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1189 1190 1191 1192 1193 1194 1195
	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;
1196 1197
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222
		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;
1223 1224 1225
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1226 1227 1228 1229 1230 1231
	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;
1232 1233 1234 1235 1236 1237
	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;
1238 1239 1240
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1241 1242 1243 1244 1245 1246 1247 1248
	default:
		r = -1;
	}

	return r;
}

int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1249
	struct inode *inode, struct file *file)
1250 1251
{
	int r = 0;
1252
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1253
	dtv_property_dump(tvp);
1254

1255 1256 1257 1258 1259 1260 1261
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1262
	switch(tvp->cmd) {
1263
	case DTV_CLEAR:
1264 1265 1266
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1267
		dprintk("%s() Flushing property cache\n", __func__);
1268
		memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1269
		fe->dtv_property_cache.state = tvp->cmd;
1270
		fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1271
		break;
1272
	case DTV_TUNE:
1273
		/* interpret the cache of data, build either a traditional frontend
1274 1275
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1276
		 */
1277
		fe->dtv_property_cache.state = tvp->cmd;
1278
		dprintk("%s() Finalised property cache\n", __func__);
1279 1280
		dtv_property_cache_submit(fe);

1281 1282
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1283
		break;
1284
	case DTV_FREQUENCY:
1285
		fe->dtv_property_cache.frequency = tvp->u.data;
1286
		break;
1287
	case DTV_MODULATION:
1288
		fe->dtv_property_cache.modulation = tvp->u.data;
1289
		break;
1290 1291
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1292
		break;
1293
	case DTV_INVERSION:
1294
		fe->dtv_property_cache.inversion = tvp->u.data;
1295
		break;
1296
	case DTV_SYMBOL_RATE:
1297
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1298
		break;
1299
	case DTV_INNER_FEC:
1300
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1301
		break;
1302
	case DTV_PILOT:
1303
		fe->dtv_property_cache.pilot = tvp->u.data;
1304
		break;
1305
	case DTV_ROLLOFF:
1306
		fe->dtv_property_cache.rolloff = tvp->u.data;
1307
		break;
1308
	case DTV_DELIVERY_SYSTEM:
1309
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1310
		break;
1311
	case DTV_VOLTAGE:
1312
		fe->dtv_property_cache.voltage = tvp->u.data;
1313
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1314
			(void *)fe->dtv_property_cache.voltage);
1315
		break;
1316
	case DTV_TONE:
1317
		fe->dtv_property_cache.sectone = tvp->u.data;
1318
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1319
			(void *)fe->dtv_property_cache.sectone);
1320
		break;
1321 1322 1323 1324 1325 1326
	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;
1327 1328 1329 1330 1331 1332
	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;
1333 1334 1335
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1336 1337
	default:
		r = -1;
1338 1339
	}

1340
	return r;
1341 1342
}

L
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1343 1344 1345 1346 1347
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;
1348
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1349 1350
	int err = -EOPNOTSUPP;

1351
	dprintk ("%s\n", __func__);
L
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1352

1353
	if (fepriv->exit)
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1354 1355 1356 1357 1358 1359 1360 1361 1362 1363
		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;

1364 1365
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1366 1367
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1368
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1369
	}
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379

	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;
1380
	int err = 0;
1381 1382 1383 1384

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1385 1386 1387

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

1388
	if(cmd == FE_SET_PROPERTY) {
1389
		tvps = (struct dtv_properties __user *)parg;
1390

1391 1392
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1393 1394 1395

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1396
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1397 1398 1399 1400 1401 1402 1403
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1404 1405
		}

1406 1407 1408 1409 1410
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1411 1412 1413 1414
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1415

1416 1417
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1418

1419 1420 1421 1422 1423
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1424 1425
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1426 1427 1428

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1429
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443
			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;
		}

1444 1445 1446 1447
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1448 1449 1450 1451 1452 1453 1454 1455 1456

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

	} else
		err = -EOPNOTSUPP;

1457 1458
out:
	kfree(tvp);
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469
	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;

L
Linus Torvalds 已提交
1470 1471
	switch (cmd) {
	case FE_GET_INFO: {
1472
		struct dvb_frontend_info* info = parg;
1473
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1474
		dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
L
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1475 1476 1477 1478 1479 1480 1481 1482

		/* 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;
	}

1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493
	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;
		}

1494 1495
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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1496
		break;
1497
	}
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1498
	case FE_READ_BER:
1499 1500
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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1501 1502 1503
		break;

	case FE_READ_SIGNAL_STRENGTH:
1504 1505
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
L
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1506 1507 1508
		break;

	case FE_READ_SNR:
1509 1510
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
L
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1511 1512 1513
		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1514 1515
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
L
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1516 1517 1518 1519
		break;


	case FE_DISEQC_RESET_OVERLOAD:
1520 1521
		if (fe->ops.diseqc_reset_overload) {
			err = fe->ops.diseqc_reset_overload(fe);
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1522 1523 1524 1525 1526 1527
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_MASTER_CMD:
1528 1529
		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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1530 1531 1532 1533 1534 1535
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_BURST:
1536 1537
		if (fe->ops.diseqc_send_burst) {
			err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
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1538 1539 1540 1541 1542 1543
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_TONE:
1544 1545
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1546
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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1547 1548 1549 1550 1551 1552
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1553 1554
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1555
			fepriv->voltage = (fe_sec_voltage_t) parg;
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1556 1557 1558 1559 1560 1561
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISHNETWORK_SEND_LEGACY_CMD:
1562 1563
		if (fe->ops.dishnetwork_send_legacy_command) {
			err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
L
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1564 1565
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
1566
		} else if (fe->ops.set_voltage) {
1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
			/*
			 * 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
			 */
1583
			unsigned long swcmd = ((unsigned long) parg) << 1;
1584 1585 1586 1587 1588
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1589
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1590 1591 1592 1593 1594 1595
			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
			 */
1596
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1597 1598 1599 1600 1601
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1602
				if ((swcmd & 0x01) != last) {
1603
					/* set voltage to (last ? 13V : 18V) */
1604
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1605 1606
					last = (last) ? 0 : 1;
				}
1607
				swcmd = swcmd >> 1;
1608 1609 1610 1611 1612
				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",
1613
					__func__, fe->dvb->num);
1614 1615 1616 1617 1618 1619
				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:
1624 1625
		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:
1629 1630
		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;

1636
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1637 1638 1639 1640 1641 1642 1643 1644 1645
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1646

1647 1648
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1649
			dtv_property_cache_sync(fe, &fepriv->parameters);
1650
		}
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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;
		}
1661
		if (fe->ops.info.type == FE_OFDM) {
1662
			/* 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 */
1670
		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 */
1676
			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;
1691 1692
				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:
1695 1696 1697
				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:
1717
		if (fe->ops.get_frontend) {
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			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1719
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
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		}
		break;
1722 1723

	case FE_SET_FRONTEND_TUNE_MODE:
1724
		fepriv->tune_mode_flags = (unsigned long) parg;
1725
		err = 0;
1726
		break;
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	};

	return err;
}

1732

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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;
1737
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1739
	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;
1753
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1754
	struct dvb_adapter *adapter = fe->dvb;
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	int ret;

1757
	dprintk ("%s\n", __func__);
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1759 1760
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779

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

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

			mutex_unlock (&adapter->mfe_lock);
			while (mferetry-- && (mfedev->users != -1 ||
					mfepriv->thread != NULL)) {
				if(msleep_interruptible(500)) {
					if(signal_pending(current))
						return -EINTR;
1780
				}
1781 1782 1783 1784
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
1785 1786 1787
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
1788 1789 1790 1791
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
1792
				}
1793
				adapter->mfe_dvbdev = dvbdev;
1794 1795 1796 1797
			}
		}
	}

1798 1799
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1800
			goto err0;
1801 1802
	}

1803 1804
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1805

1806
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1807 1808 1809 1810 1811
		/* 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)
1814
			goto err2;
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		/*  empty event queue */
		fepriv->events.eventr = fepriv->events.eventw = 0;
	}

1820 1821
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
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	return ret;
1823 1824 1825 1826 1827 1828

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
1829 1830 1831
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
1832
	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;
1839
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1840
	int ret;
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1842
	dprintk ("%s\n", __func__);
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	if ((file->f_flags & O_ACCMODE) != O_RDONLY)
		fepriv->release_jiffies = jiffies;

1847 1848
	ret = dvb_generic_release (inode, file);

1849 1850 1851 1852 1853 1854 1855 1856
	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);
1857
	}
1858

1859
	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
	};

1882
	dprintk ("%s\n", __func__);
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1884
	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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1888
	if (fe->frontend_priv == NULL) {
1889
		mutex_unlock(&frontend_mutex);
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1890 1891
		return -ENOMEM;
	}
1892
	fepriv = fe->frontend_priv;
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1893 1894 1895 1896

	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
1897
	mutex_init(&fepriv->events.mtx);
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	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

1901
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
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		fe->dvb->num,
1903
		fe->id,
1904
		fe->ops.info.name);
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	dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
			     fe, DVB_DEVICE_FRONTEND);

1909
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
1916
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1917
	dprintk ("%s\n", __func__);
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1919
	mutex_lock(&frontend_mutex);
1920
	dvb_frontend_stop (fe);
1921 1922 1923 1924 1925 1926
	mutex_unlock(&frontend_mutex);

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

1927
	mutex_lock(&frontend_mutex);
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1928
	dvb_unregister_device (fepriv->dvbdev);
1929

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1930 1931
	/* fe is invalid now */
	kfree(fepriv);
1932
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
1936

1937
#ifdef CONFIG_MEDIA_ATTACH
1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
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);
	}
1950 1951 1952 1953
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
	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);
1967 1968
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
1969 1970 1971 1972 1973
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);