dvb_frontend.c 61.6 KB
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/*
 * dvb_frontend.c: DVB frontend tuning interface/thread
 *
 *
 * Copyright (C) 1999-2001 Ralph  Metzler
 *			   Marcus Metzler
 *			   Holger Waechtler
 *				      for convergence integrated media GmbH
 *
 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 */

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

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

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

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static DEFINE_MUTEX(frontend_mutex);
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struct dvb_frontend_private {

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

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

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

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

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

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

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

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

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

	wake_up_interruptible (&events->wait_queue);
}

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

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

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

		if (flags & O_NONBLOCK)
			return -EWOULDBLOCK;

		up(&fepriv->sem);

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

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

		if (ret < 0)
			return ret;
	}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

		case 1:
			if (!autoinversion) break;

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

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

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

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

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

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

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

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

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

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

	fepriv->auto_sub_step++;
	return 0;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
{
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	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	if (fepriv->exit)
		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 */
562
			fepriv->exit = 1;
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			break;
		}

566
		if (try_to_freeze())
567
			goto restart;
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		if (down_interruptible(&fepriv->sem))
			break;

572 573
		if (fepriv->reinitialise) {
			dvb_frontend_init(fe);
574
			if (fepriv->tone != -1) {
575
				fe->ops.set_tone(fe, fepriv->tone);
576 577
			}
			if (fepriv->voltage != -1) {
578
				fe->ops.set_voltage(fe, fepriv->voltage);
579
			}
580 581 582
			fepriv->reinitialise = 0;
		}

583
		/* do an iteration of the tuning loop */
584
		if (fe->ops.get_frontend_algo) {
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			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 ? */

591
				if (fepriv->state & FESTATE_RETUNE) {
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					dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
593
					params = &fepriv->parameters;
594 595 596
					fepriv->state = FESTATE_TUNED;
				}

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

600
				if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
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					dprintk("%s: state changed, adding current state\n", __func__);
602 603 604
					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__);
608
				dvb_frontend_swzigzag(fe);
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				break;
			case DVBFE_ALGO_CUSTOM:
				params = NULL; /* have we been asked to RETUNE ?	*/
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
				if (fepriv->state & FESTATE_RETUNE) {
					dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
615
					params = &fepriv->parameters;
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					fepriv->state = FESTATE_TUNED;
				}
				/* Case where we are going to search for a carrier
				 * User asked us to retune again for some reason, possibly
				 * requesting a search with a new set of parameters
				 */
				if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
623
					if (fe->ops.search) {
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						fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
						/* We did do a search as was requested, the flags are
						 * now unset as well and has the flags wrt to search.
						 */
628 629 630
					} else {
						fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
					}
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				}
				/* Track the carrier if the search was successful */
				if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
					if (fe->ops.track)
						fe->ops.track(fe, &fepriv->parameters);
636 637 638 639 640 641 642 643 644 645 646 647 648 649
				} else {
					fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
					fepriv->delay = HZ / 2;
				}
				fe->ops.read_status(fe, &s);
				if (s != fepriv->status) {
					dvb_frontend_add_event(fe, s); /* update event list */
					fepriv->status = s;
					if (!(s & FE_HAS_LOCK)) {
						fepriv->delay = HZ / 10;
						fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
					} else {
						fepriv->delay = 60 * HZ;
					}
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				}
				break;
			default:
				dprintk("%s: UNDEFINED ALGO !\n", __func__);
				break;
			}
		} else {
657
			dvb_frontend_swzigzag(fe);
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		}
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	}

661 662 663
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
664
		if (fe->ops.tuner_ops.sleep) {
665 666
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 1);
667 668 669
			fe->ops.tuner_ops.sleep(fe);
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 0);
670
		}
671 672
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

675
	fepriv->thread = NULL;
676
	fepriv->exit = 0;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
685
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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687
	dprintk ("%s\n", __func__);
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	fepriv->exit = 1;
	mb();

692
	if (!fepriv->thread)
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		return;

695
	kthread_stop(fepriv->thread);
696

697
	init_MUTEX (&fepriv->sem);
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	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
701 702 703
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748
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;
752
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
753
	struct task_struct *fe_thread;
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755
	dprintk ("%s\n", __func__);
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757
	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;
771
	fepriv->thread = NULL;
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	mb();

774
	fe_thread = kthread_run(dvb_frontend_thread, fe,
775
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
776 777 778
	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;
	}
782
	fepriv->thread = fe_thread;
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	return 0;
}

786 787 788 789 790 791 792 793 794 795 796 797 798
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)
799 800
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
801 802
}

803 804 805
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
806 807 808
	u32 freq_min;
	u32 freq_max;

809
	/* range check: frequency */
810 811 812
	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
813 814
		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);
815 816 817 818 819 820 821 822 823
		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)) {
824 825
			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,
826 827 828 829 830 831 832 833 834
			       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)) {
835 836
			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,
837 838 839 840 841
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

842 843 844 845 846 847 848 849 850
	/* check for supported modulation */
	if (fe->ops.info.type == FE_QAM &&
	    (parms->u.qam.modulation > QAM_AUTO ||
	     !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
		printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
		       fe->dvb->num, fe->id, parms->u.qam.modulation);
			return -EINVAL;
	}

851 852 853
	return 0;
}

854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896
static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
{
	int i;

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

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

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

	return 0;
}

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

897
static struct dtv_cmds_h dtv_cmds[] = {
898 899 900
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
901 902
		.set	= 1,
	},
903 904 905
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
906 907 908 909
		.set	= 1,
	},

	/* Set */
910 911 912
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
913 914
		.set	= 1,
	},
915 916 917
	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
918 919
		.set	= 1,
	},
920 921 922
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
923 924
		.set	= 1,
	},
925 926 927
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
928 929
		.set	= 1,
	},
930 931 932
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
933 934 935
		.set	= 1,
		.buffer	= 1,
	},
936 937 938
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
939 940
		.set	= 1,
	},
941 942 943
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
944 945
		.set	= 1,
	},
946 947 948
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
949 950
		.set	= 1,
	},
951 952 953
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
954 955
		.set	= 1,
	},
956 957 958
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
959 960
		.set	= 1,
	},
961 962 963
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
964 965
		.set	= 1,
	},
966 967 968
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
969 970
		.set	= 1,
	},
971 972 973 974 975
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 1,
	},
976 977 978 979 980 981 982 983 984 985
	[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,
	},
986 987 988 989 990 991 992 993 994 995
	[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,
	},
996 997 998 999 1000 1001

	_DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
	_DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
	_DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1002
	_DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
	_DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),

	_DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
	_DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
	_DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
	_DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
1021
	_DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
	_DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
	_DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),

1035 1036
	_DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),

1037
	/* Get */
1038 1039 1040
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
1041 1042 1043
		.set	= 0,
		.buffer	= 1,
	},
1044

1045 1046 1047 1048 1049
	[DTV_API_VERSION] = {
		.name	= "DTV_API_VERSION",
		.cmd	= DTV_API_VERSION,
		.set	= 0,
	},
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059
	[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,
	},
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
	[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,
	},
1070 1071 1072 1073 1074
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 0,
	},
1075 1076
};

1077
static void dtv_property_dump(struct dtv_property *tvp)
1078 1079 1080
{
	int i;

1081
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1082
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1083 1084 1085 1086
			__func__, tvp->cmd);
		return;
	}

1087 1088
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
1089
		,tvp->cmd
1090
		,dtv_cmds[ tvp->cmd ].name);
1091

1092
	if(dtv_cmds[ tvp->cmd ].buffer) {
1093

1094 1095
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
1096 1097 1098
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
1099 1100
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
1101 1102 1103 1104
				,i
				,tvp->u.buffer.data[i]);

	} else
1105
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1106 1107
}

1108
static int is_legacy_delivery_system(fe_delivery_system_t s)
1109 1110
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1111 1112
	   (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
	   (s == SYS_ATSC))
1113 1114 1115 1116 1117
		return 1;

	return 0;
}

1118 1119 1120 1121
/* 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.
 */
1122 1123
static void dtv_property_cache_sync(struct dvb_frontend *fe,
				    struct dvb_frontend_parameters *p)
1124 1125 1126 1127 1128 1129 1130 1131
{
	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:
1132 1133
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1134 1135
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
1136
		c->delivery_system = SYS_DVBS;
1137 1138 1139 1140 1141
		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;
1142
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1143 1144
		break;
	case FE_OFDM:
1145 1146 1147 1148 1149 1150 1151 1152 1153
		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;
1154 1155 1156 1157 1158 1159
		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;
1160
		c->delivery_system = SYS_DVBT;
1161 1162 1163
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
1164 1165 1166 1167
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1168 1169 1170 1171
		break;
	}
}

1172 1173 1174
/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the advanced tuning API.
 */
1175
static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1176
{
1177 1178 1179
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1180

1181 1182
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1183

1184 1185
	switch (fe->ops.info.type) {
	case FE_QPSK:
1186
		dprintk("%s() Preparing QPSK req\n", __func__);
1187 1188
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1189
		c->delivery_system = SYS_DVBS;
1190 1191
		break;
	case FE_QAM:
1192
		dprintk("%s() Preparing QAM req\n", __func__);
1193 1194 1195
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1196
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1197 1198
		break;
	case FE_OFDM:
1199
		dprintk("%s() Preparing OFDM req\n", __func__);
1200 1201 1202 1203 1204 1205 1206 1207
		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;
1208 1209 1210 1211 1212 1213
		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;
1214
		c->delivery_system = SYS_DVBT;
1215 1216
		break;
	case FE_ATSC:
1217
		dprintk("%s() Preparing VSB req\n", __func__);
1218
		p->u.vsb.modulation = c->modulation;
1219 1220 1221 1222
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1223 1224 1225 1226 1227 1228 1229
		break;
	}
}

/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the legacy tuning API.
 */
1230
static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1231
{
1232
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1233
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1234
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1235

1236 1237 1238 1239
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1240 1241
	case PSK_8:
	case APSK_16:
1242
	case APSK_32:
1243
	case QPSK:
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
		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;
1254
		p->inversion = c->inversion;
1255 1256 1257 1258 1259 1260
		p->u.ofdm.constellation = QAM_AUTO;
		p->u.ofdm.code_rate_HP = FEC_AUTO;
		p->u.ofdm.code_rate_LP = FEC_AUTO;
		p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
		p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
		p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1261 1262 1263 1264 1265 1266 1267 1268
		if (c->bandwidth_hz == 8000000)
			p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
		else if (c->bandwidth_hz == 7000000)
			p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
		else if (c->bandwidth_hz == 6000000)
			p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
		else
			p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1269 1270 1271
	}
}

1272
static void dtv_property_cache_submit(struct dvb_frontend *fe)
1273 1274 1275 1276 1277 1278 1279
{
	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.
	 */
1280 1281
	if(is_legacy_delivery_system(c->delivery_system)) {

1282
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1283
		dtv_property_legacy_params_sync(fe);
1284 1285

	} else {
1286
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1287

1288 1289 1290 1291 1292 1293
		/* 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.
		 */
1294
		dtv_property_adv_params_sync(fe);
1295 1296 1297
	}
}

1298 1299 1300 1301 1302
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);

1303 1304 1305
static int dtv_property_process_get(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct inode *inode, struct file *file)
1306 1307 1308 1309 1310
{
	int r = 0;

	dtv_property_dump(tvp);

1311 1312 1313 1314 1315 1316 1317
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1318 1319 1320 1321 1322 1323 1324
	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;
1325 1326
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
		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;
1352 1353 1354
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1355 1356 1357 1358 1359 1360
	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;
1361 1362 1363 1364 1365 1366
	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;
1367 1368 1369
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386

	/* ISDB-T Support here */
	case DTV_ISDBT_PARTIAL_RECEPTION:
		tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
		break;
	case DTV_ISDBT_SOUND_BROADCASTING:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
		break;
	case DTV_ISDBT_SB_SUBCHANNEL_ID:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
		break;
	case DTV_ISDBT_SB_SEGMENT_IDX:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
		break;
	case DTV_ISDBT_SB_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
		break;
1387 1388 1389
	case DTV_ISDBT_LAYER_ENABLED:
		tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
		break;
1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425
	case DTV_ISDBT_LAYERA_FEC:
		tvp->u.data = fe->dtv_property_cache.layer[0].fec;
		break;
	case DTV_ISDBT_LAYERA_MODULATION:
		tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
		break;
	case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
		break;
	case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
		tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
		break;
	case DTV_ISDBT_LAYERB_FEC:
		tvp->u.data = fe->dtv_property_cache.layer[1].fec;
		break;
	case DTV_ISDBT_LAYERB_MODULATION:
		tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
		break;
	case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
		break;
	case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
		tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
		break;
	case DTV_ISDBT_LAYERC_FEC:
		tvp->u.data = fe->dtv_property_cache.layer[2].fec;
		break;
	case DTV_ISDBT_LAYERC_MODULATION:
		tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
		break;
	case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
		tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
		break;
	case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
		tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
		break;
1426 1427 1428
	case DTV_ISDBS_TS_ID:
		tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
		break;
1429 1430 1431 1432 1433 1434 1435
	default:
		r = -1;
	}

	return r;
}

1436 1437 1438 1439
static int dtv_property_process_set(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct inode *inode,
				    struct file *file)
1440 1441
{
	int r = 0;
1442
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1443
	dtv_property_dump(tvp);
1444

1445 1446 1447 1448 1449 1450 1451
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1452
	switch(tvp->cmd) {
1453
	case DTV_CLEAR:
1454 1455 1456
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1457
		dvb_frontend_clear_cache(fe);
1458
		dprintk("%s() Flushing property cache\n", __func__);
1459
		break;
1460
	case DTV_TUNE:
1461
		/* interpret the cache of data, build either a traditional frontend
1462 1463
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1464
		 */
1465
		fe->dtv_property_cache.state = tvp->cmd;
1466
		dprintk("%s() Finalised property cache\n", __func__);
1467 1468
		dtv_property_cache_submit(fe);

1469 1470
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1471
		break;
1472
	case DTV_FREQUENCY:
1473
		fe->dtv_property_cache.frequency = tvp->u.data;
1474
		break;
1475
	case DTV_MODULATION:
1476
		fe->dtv_property_cache.modulation = tvp->u.data;
1477
		break;
1478 1479
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1480
		break;
1481
	case DTV_INVERSION:
1482
		fe->dtv_property_cache.inversion = tvp->u.data;
1483
		break;
1484
	case DTV_SYMBOL_RATE:
1485
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1486
		break;
1487
	case DTV_INNER_FEC:
1488
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1489
		break;
1490
	case DTV_PILOT:
1491
		fe->dtv_property_cache.pilot = tvp->u.data;
1492
		break;
1493
	case DTV_ROLLOFF:
1494
		fe->dtv_property_cache.rolloff = tvp->u.data;
1495
		break;
1496
	case DTV_DELIVERY_SYSTEM:
1497
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1498
		break;
1499
	case DTV_VOLTAGE:
1500
		fe->dtv_property_cache.voltage = tvp->u.data;
1501
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1502
			(void *)fe->dtv_property_cache.voltage);
1503
		break;
1504
	case DTV_TONE:
1505
		fe->dtv_property_cache.sectone = tvp->u.data;
1506
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1507
			(void *)fe->dtv_property_cache.sectone);
1508
		break;
1509 1510 1511 1512 1513 1514
	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;
1515 1516 1517 1518 1519 1520
	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;
1521 1522 1523
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540

	/* ISDB-T Support here */
	case DTV_ISDBT_PARTIAL_RECEPTION:
		fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
		break;
	case DTV_ISDBT_SOUND_BROADCASTING:
		fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
		break;
	case DTV_ISDBT_SB_SUBCHANNEL_ID:
		fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
		break;
	case DTV_ISDBT_SB_SEGMENT_IDX:
		fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
		break;
	case DTV_ISDBT_SB_SEGMENT_COUNT:
		fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
		break;
1541 1542 1543
	case DTV_ISDBT_LAYER_ENABLED:
		fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
		break;
1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579
	case DTV_ISDBT_LAYERA_FEC:
		fe->dtv_property_cache.layer[0].fec = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERA_MODULATION:
		fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
		fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
		fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_FEC:
		fe->dtv_property_cache.layer[1].fec = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_MODULATION:
		fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
		fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
		fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_FEC:
		fe->dtv_property_cache.layer[2].fec = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_MODULATION:
		fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
		fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
		break;
	case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
		fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
		break;
1580 1581 1582
	case DTV_ISDBS_TS_ID:
		fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
		break;
1583 1584
	default:
		r = -1;
1585 1586
	}

1587
	return r;
1588 1589
}

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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;
1595
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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1596 1597
	int err = -EOPNOTSUPP;

1598
	dprintk ("%s\n", __func__);
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1599

1600
	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;

1611 1612
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1613 1614
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1615
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1616
	}
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626

	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;
1627
	int err = 0;
1628 1629 1630 1631

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1632 1633 1634

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

1635
	if(cmd == FE_SET_PROPERTY) {
1636
		tvps = (struct dtv_properties __user *)parg;
1637

1638 1639
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1640 1641 1642

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1643
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1644 1645 1646 1647 1648 1649 1650
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1651 1652
		}

1653 1654 1655 1656 1657
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1658 1659 1660 1661
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1662

1663 1664
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1665

1666 1667 1668 1669 1670
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1671 1672
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1673 1674 1675

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1676
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690
			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;
		}

1691 1692 1693 1694
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1695 1696 1697 1698 1699 1700 1701 1702 1703

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

	} else
		err = -EOPNOTSUPP;

1704 1705
out:
	kfree(tvp);
1706 1707 1708 1709 1710 1711 1712 1713 1714
	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;
1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
	int cb_err, err = -EOPNOTSUPP;

	if (fe->dvb->fe_ioctl_override) {
		cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
						    DVB_FE_IOCTL_PRE);
		if (cb_err < 0)
			return cb_err;
		if (cb_err > 0)
			return 0;
		/* fe_ioctl_override returning 0 allows
		 * dvb-core to continue handling the ioctl */
	}
1727

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	switch (cmd) {
	case FE_GET_INFO: {
1730
		struct dvb_frontend_info* info = parg;
1731
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1732
		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;
	}

1741 1742 1743 1744 1745
	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 */
1746 1747
		if (fepriv->state == FESTATE_RETUNE ||
		    fepriv->state == FESTATE_ERROR) {
1748 1749 1750 1751 1752
			err=0;
			*status = 0;
			break;
		}

1753 1754
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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		break;
1756
	}
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	case FE_READ_BER:
1758 1759
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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		break;

	case FE_READ_SIGNAL_STRENGTH:
1763 1764
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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		break;

	case FE_READ_SNR:
1768 1769
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1773 1774
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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		break;


	case FE_DISEQC_RESET_OVERLOAD:
1779 1780
		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:
1787 1788
		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:
1795 1796
		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:
1803 1804
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1805
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1812 1813
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1814
			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:
1821 1822
		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;
1825
		} else if (fe->ops.set_voltage) {
1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841
			/*
			 * 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
			 */
1842
			unsigned long swcmd = ((unsigned long) parg) << 1;
1843 1844 1845 1846 1847
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1848
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1849 1850 1851 1852 1853 1854
			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
			 */
1855
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1856 1857 1858 1859 1860
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1861
				if ((swcmd & 0x01) != last) {
1862
					/* set voltage to (last ? 13V : 18V) */
1863
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1864 1865
					last = (last) ? 0 : 1;
				}
1866
				swcmd = swcmd >> 1;
1867 1868 1869 1870 1871
				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",
1872
					__func__, fe->dvb->num);
1873 1874 1875 1876 1877 1878
				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:
1883 1884
		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:
1888 1889
		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;

1895
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1896 1897 1898 1899 1900 1901 1902 1903 1904
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1905

1906 1907
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1908
			dtv_property_cache_sync(fe, &fepriv->parameters);
1909
		}
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1910 1911 1912 1913 1914 1915 1916 1917 1918 1919

		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;
		}
1920
		if (fe->ops.info.type == FE_OFDM) {
1921
			/* without hierarchical coding code_rate_LP is irrelevant,
L
Linus Torvalds 已提交
1922 1923 1924 1925 1926 1927 1928
			 * 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 */
1929
		if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
L
Linus Torvalds 已提交
1930 1931 1932 1933 1934
			fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
			fepriv->max_drift = fetunesettings.max_drift;
			fepriv->step_size = fetunesettings.step_size;
		} else {
			/* default values */
1935
			switch(fe->ops.info.type) {
L
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1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
			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;
1950 1951
				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:
1954 1955 1956
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0;
				fepriv->max_drift = 0;
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1957 1958 1959 1960 1961 1962 1963
				break;
			}
		}
		if (dvb_override_tune_delay > 0)
			fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;

		fepriv->state = FESTATE_RETUNE;
1964 1965 1966 1967

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

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		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:
1980
		if (fe->ops.get_frontend) {
L
Linus Torvalds 已提交
1981
			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1982
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
L
Linus Torvalds 已提交
1983 1984
		}
		break;
1985 1986

	case FE_SET_FRONTEND_TUNE_MODE:
1987
		fepriv->tune_mode_flags = (unsigned long) parg;
1988
		err = 0;
1989
		break;
L
Linus Torvalds 已提交
1990 1991
	};

1992 1993 1994 1995 1996 1997 1998
	if (fe->dvb->fe_ioctl_override) {
		cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
						    DVB_FE_IOCTL_POST);
		if (cb_err < 0)
			return cb_err;
	}

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	return err;
}

2002

L
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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;
2007
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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2009
	dprintk ("%s\n", __func__);
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2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

	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;
2023
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2024
	struct dvb_adapter *adapter = fe->dvb;
L
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2025 2026
	int ret;

2027
	dprintk ("%s\n", __func__);
L
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2028

2029 2030
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049

		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;
2050
				}
2051 2052 2053 2054
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
2055 2056 2057
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
2058 2059 2060 2061
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
2062
				}
2063
				adapter->mfe_dvbdev = dvbdev;
2064 2065 2066 2067
			}
		}
	}

2068 2069
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2070
			goto err0;
2071 2072
	}

2073 2074
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
2075

2076
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2077 2078 2079 2080 2081
		/* 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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2082 2083
		ret = dvb_frontend_start (fe);
		if (ret)
2084
			goto err2;
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2085 2086 2087 2088 2089

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

2090 2091
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
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2092
	return ret;
2093 2094 2095 2096 2097 2098

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
2099 2100 2101
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
2102
	return ret;
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2103 2104 2105 2106 2107 2108
}

static int dvb_frontend_release(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
2109
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2110
	int ret;
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2111

2112
	dprintk ("%s\n", __func__);
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2113 2114 2115 2116

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

2117 2118
	ret = dvb_generic_release (inode, file);

2119 2120 2121 2122 2123 2124 2125 2126
	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);
2127
	}
2128

2129
	return ret;
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2130 2131
}

2132
static const struct file_operations dvb_frontend_fops = {
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2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151
	.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
	};

2152
	dprintk ("%s\n", __func__);
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Linus Torvalds 已提交
2153

2154
	if (mutex_lock_interruptible(&frontend_mutex))
L
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2155 2156
		return -ERESTARTSYS;

P
 
Panagiotis Issaris 已提交
2157
	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
L
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2158
	if (fe->frontend_priv == NULL) {
2159
		mutex_unlock(&frontend_mutex);
L
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2160 2161
		return -ENOMEM;
	}
2162
	fepriv = fe->frontend_priv;
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2163 2164 2165 2166

	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
2167
	mutex_init(&fepriv->events.mtx);
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2168 2169 2170
	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

2171
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
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2172
		fe->dvb->num,
2173
		fe->id,
2174
		fe->ops.info.name);
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2175 2176 2177 2178

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

2179
	mutex_unlock(&frontend_mutex);
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2180 2181 2182 2183 2184 2185
	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
2186
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2187
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
2188

2189
	mutex_lock(&frontend_mutex);
2190
	dvb_frontend_stop (fe);
2191 2192 2193 2194 2195 2196
	mutex_unlock(&frontend_mutex);

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

2197
	mutex_lock(&frontend_mutex);
L
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2198
	dvb_unregister_device (fepriv->dvbdev);
2199

L
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2200 2201
	/* fe is invalid now */
	kfree(fepriv);
2202
	mutex_unlock(&frontend_mutex);
L
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2203 2204 2205
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
2206

2207
#ifdef CONFIG_MEDIA_ATTACH
2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219
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);
	}
2220 2221 2222 2223
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236
	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);
2237 2238
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
2239 2240 2241 2242 2243
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);