dvb_frontend.c 60.6 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>
#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 */
561
			fepriv->exit = 1;
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			break;
		}

565
		if (try_to_freeze())
566
			goto restart;
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		if (down_interruptible(&fepriv->sem))
			break;

571 572
		if (fepriv->reinitialise) {
			dvb_frontend_init(fe);
573
			if (fepriv->tone != -1) {
574
				fe->ops.set_tone(fe, fepriv->tone);
575 576
			}
			if (fepriv->voltage != -1) {
577
				fe->ops.set_voltage(fe, fepriv->voltage);
578
			}
579 580 581
			fepriv->reinitialise = 0;
		}

582
		/* do an iteration of the tuning loop */
583
		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 ? */

590
				if (fepriv->state & FESTATE_RETUNE) {
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					dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
592
					params = &fepriv->parameters;
593 594 595
					fepriv->state = FESTATE_TUNED;
				}

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

599
				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__);
601 602 603
					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__);
607
				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__);
614
					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) {
622
					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.
						 */
627 628 629
					} 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);
635 636 637 638 639 640 641 642 643 644 645 646 647 648
				} 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 {
656
			dvb_frontend_swzigzag(fe);
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		}
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	}

660 661 662
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
663
		if (fe->ops.tuner_ops.sleep) {
664 665
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 1);
666 667 668
			fe->ops.tuner_ops.sleep(fe);
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 0);
669
		}
670 671
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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	}

674
	fepriv->thread = NULL;
675
	fepriv->exit = 0;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
684
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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686
	dprintk ("%s\n", __func__);
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	fepriv->exit = 1;
	mb();

691
	if (!fepriv->thread)
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		return;

694
	kthread_stop(fepriv->thread);
695

696
	init_MUTEX (&fepriv->sem);
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	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
700 701 702
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
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;
751
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
752
	struct task_struct *fe_thread;
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754
	dprintk ("%s\n", __func__);
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756
	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;
770
	fepriv->thread = NULL;
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	mb();

773
	fe_thread = kthread_run(dvb_frontend_thread, fe,
774
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
775 776 777
	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;
	}
781
	fepriv->thread = fe_thread;
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	return 0;
}

785 786 787 788 789 790 791 792 793 794 795 796 797
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)
798 799
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
800 801
}

802 803 804
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
805 806 807
	u32 freq_min;
	u32 freq_max;

808
	/* range check: frequency */
809 810 811
	dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
812 813
		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);
814 815 816 817 818 819 820 821 822
		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)) {
823 824
			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,
825 826 827 828 829 830 831 832 833
			       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)) {
834 835
			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,
836 837 838 839 840
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

841 842 843 844 845 846 847 848 849
	/* 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;
	}

850 851 852
	return 0;
}

853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895
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 \
}

896
static struct dtv_cmds_h dtv_cmds[] = {
897 898 899
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
900 901
		.set	= 1,
	},
902 903 904
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
905 906 907 908
		.set	= 1,
	},

	/* Set */
909 910 911
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
912 913
		.set	= 1,
	},
914 915 916
	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
917 918
		.set	= 1,
	},
919 920 921
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
922 923
		.set	= 1,
	},
924 925 926
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
927 928
		.set	= 1,
	},
929 930 931
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
932 933 934
		.set	= 1,
		.buffer	= 1,
	},
935 936 937
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
938 939
		.set	= 1,
	},
940 941 942
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
943 944
		.set	= 1,
	},
945 946 947
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
948 949
		.set	= 1,
	},
950 951 952
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
953 954
		.set	= 1,
	},
955 956 957
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
958 959
		.set	= 1,
	},
960 961 962
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
963 964
		.set	= 1,
	},
965 966 967
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
968 969
		.set	= 1,
	},
970 971 972 973 974
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 1,
	},
975 976 977 978 979 980 981 982 983 984
	[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,
	},
985 986 987 988 989 990 991 992 993 994
	[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,
	},
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031

	_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),
	_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),
	_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),

1032
	/* Get */
1033 1034 1035
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
1036 1037 1038
		.set	= 0,
		.buffer	= 1,
	},
1039

1040 1041 1042 1043 1044
	[DTV_API_VERSION] = {
		.name	= "DTV_API_VERSION",
		.cmd	= DTV_API_VERSION,
		.set	= 0,
	},
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
	[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,
	},
1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
	[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,
	},
1065 1066 1067 1068 1069
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 0,
	},
1070 1071
};

1072
static void dtv_property_dump(struct dtv_property *tvp)
1073 1074 1075
{
	int i;

1076
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1077
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1078 1079 1080 1081
			__func__, tvp->cmd);
		return;
	}

1082 1083
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
1084
		,tvp->cmd
1085
		,dtv_cmds[ tvp->cmd ].name);
1086

1087
	if(dtv_cmds[ tvp->cmd ].buffer) {
1088

1089 1090
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
1091 1092 1093
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
1094 1095
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
1096 1097 1098 1099
				,i
				,tvp->u.buffer.data[i]);

	} else
1100
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1101 1102
}

1103
static int is_legacy_delivery_system(fe_delivery_system_t s)
1104 1105
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1106 1107
	   (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
	   (s == SYS_ATSC))
1108 1109 1110 1111 1112
		return 1;

	return 0;
}

1113 1114 1115 1116
/* 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.
 */
1117 1118
static void dtv_property_cache_sync(struct dvb_frontend *fe,
				    struct dvb_frontend_parameters *p)
1119 1120 1121 1122 1123 1124 1125 1126
{
	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:
1127 1128
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1129 1130
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
1131
		c->delivery_system = SYS_DVBS;
1132 1133 1134 1135 1136
		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;
1137
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1138 1139
		break;
	case FE_OFDM:
1140 1141 1142 1143 1144 1145 1146 1147 1148
		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;
1149 1150 1151 1152 1153 1154
		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;
1155
		c->delivery_system = SYS_DVBT;
1156 1157 1158
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
1159 1160 1161 1162
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1163 1164 1165 1166
		break;
	}
}

1167 1168 1169
/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the advanced tuning API.
 */
1170
static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1171
{
1172 1173 1174
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1175

1176 1177
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1178

1179 1180
	switch (fe->ops.info.type) {
	case FE_QPSK:
1181
		dprintk("%s() Preparing QPSK req\n", __func__);
1182 1183
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1184
		c->delivery_system = SYS_DVBS;
1185 1186
		break;
	case FE_QAM:
1187
		dprintk("%s() Preparing QAM req\n", __func__);
1188 1189 1190
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1191
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1192 1193
		break;
	case FE_OFDM:
1194
		dprintk("%s() Preparing OFDM req\n", __func__);
1195 1196 1197 1198 1199 1200 1201 1202
		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;
1203 1204 1205 1206 1207 1208
		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;
1209
		c->delivery_system = SYS_DVBT;
1210 1211
		break;
	case FE_ATSC:
1212
		dprintk("%s() Preparing VSB req\n", __func__);
1213
		p->u.vsb.modulation = c->modulation;
1214 1215 1216 1217
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1218 1219 1220 1221 1222 1223 1224
		break;
	}
}

/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the legacy tuning API.
 */
1225
static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1226
{
1227
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1228
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1229
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1230

1231 1232 1233 1234
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1235 1236
	case PSK_8:
	case APSK_16:
1237
	case APSK_32:
1238
	case QPSK:
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
		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;
1249
		p->inversion = c->inversion;
1250 1251 1252 1253 1254 1255
		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;
1256 1257 1258 1259 1260 1261 1262 1263
		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;
1264 1265 1266
	}
}

1267
static void dtv_property_cache_submit(struct dvb_frontend *fe)
1268 1269 1270 1271 1272 1273 1274
{
	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.
	 */
1275 1276
	if(is_legacy_delivery_system(c->delivery_system)) {

1277
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1278
		dtv_property_legacy_params_sync(fe);
1279 1280

	} else {
1281
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1282

1283 1284 1285 1286 1287 1288
		/* 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.
		 */
1289
		dtv_property_adv_params_sync(fe);
1290 1291 1292
	}
}

1293 1294 1295 1296 1297
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);

1298 1299 1300
static int dtv_property_process_get(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct inode *inode, struct file *file)
1301 1302 1303 1304 1305
{
	int r = 0;

	dtv_property_dump(tvp);

1306 1307 1308 1309 1310 1311 1312
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1313 1314 1315 1316 1317 1318 1319
	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;
1320 1321
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346
		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;
1347 1348 1349
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1350 1351 1352 1353 1354 1355
	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;
1356 1357 1358 1359 1360 1361
	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;
1362 1363 1364
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 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

	/* 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;
	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;
1418 1419 1420 1421 1422 1423 1424
	default:
		r = -1;
	}

	return r;
}

1425 1426 1427 1428
static int dtv_property_process_set(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct inode *inode,
				    struct file *file)
1429 1430
{
	int r = 0;
1431
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1432
	dtv_property_dump(tvp);
1433

1434 1435 1436 1437 1438 1439 1440
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1441
	switch(tvp->cmd) {
1442
	case DTV_CLEAR:
1443 1444 1445
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1446
		dvb_frontend_clear_cache(fe);
1447
		dprintk("%s() Flushing property cache\n", __func__);
1448
		break;
1449
	case DTV_TUNE:
1450
		/* interpret the cache of data, build either a traditional frontend
1451 1452
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1453
		 */
1454
		fe->dtv_property_cache.state = tvp->cmd;
1455
		dprintk("%s() Finalised property cache\n", __func__);
1456 1457
		dtv_property_cache_submit(fe);

1458 1459
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1460
		break;
1461
	case DTV_FREQUENCY:
1462
		fe->dtv_property_cache.frequency = tvp->u.data;
1463
		break;
1464
	case DTV_MODULATION:
1465
		fe->dtv_property_cache.modulation = tvp->u.data;
1466
		break;
1467 1468
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1469
		break;
1470
	case DTV_INVERSION:
1471
		fe->dtv_property_cache.inversion = tvp->u.data;
1472
		break;
1473
	case DTV_SYMBOL_RATE:
1474
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1475
		break;
1476
	case DTV_INNER_FEC:
1477
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1478
		break;
1479
	case DTV_PILOT:
1480
		fe->dtv_property_cache.pilot = tvp->u.data;
1481
		break;
1482
	case DTV_ROLLOFF:
1483
		fe->dtv_property_cache.rolloff = tvp->u.data;
1484
		break;
1485
	case DTV_DELIVERY_SYSTEM:
1486
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1487
		break;
1488
	case DTV_VOLTAGE:
1489
		fe->dtv_property_cache.voltage = tvp->u.data;
1490
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1491
			(void *)fe->dtv_property_cache.voltage);
1492
		break;
1493
	case DTV_TONE:
1494
		fe->dtv_property_cache.sectone = tvp->u.data;
1495
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1496
			(void *)fe->dtv_property_cache.sectone);
1497
		break;
1498 1499 1500 1501 1502 1503
	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;
1504 1505 1506 1507 1508 1509
	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;
1510 1511 1512
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565

	/* 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;
	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;
1566 1567
	default:
		r = -1;
1568 1569
	}

1570
	return r;
1571 1572
}

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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;
1578
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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	int err = -EOPNOTSUPP;

1581
	dprintk ("%s\n", __func__);
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1582

1583
	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;

1594 1595
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1596 1597
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1598
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1599
	}
1600 1601 1602 1603 1604 1605 1606 1607 1608 1609

	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;
1610
	int err = 0;
1611 1612 1613 1614

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1615 1616 1617

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

1618
	if(cmd == FE_SET_PROPERTY) {
1619
		tvps = (struct dtv_properties __user *)parg;
1620

1621 1622
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1623 1624 1625

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1626
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1627 1628 1629 1630 1631 1632 1633
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1634 1635
		}

1636 1637 1638 1639 1640
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1641 1642 1643 1644
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1645

1646 1647
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1648

1649 1650 1651 1652 1653
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1654 1655
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1656 1657 1658

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1659
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673
			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;
		}

1674 1675 1676 1677
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1678 1679 1680 1681 1682 1683 1684 1685 1686

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

	} else
		err = -EOPNOTSUPP;

1687 1688
out:
	kfree(tvp);
1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699
	return err;
}

static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	int err = -EOPNOTSUPP;

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	switch (cmd) {
	case FE_GET_INFO: {
1702
		struct dvb_frontend_info* info = parg;
1703
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1704
		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;
	}

1713 1714 1715 1716 1717
	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 */
1718 1719
		if (fepriv->state == FESTATE_RETUNE ||
		    fepriv->state == FESTATE_ERROR) {
1720 1721 1722 1723 1724
			err=0;
			*status = 0;
			break;
		}

1725 1726
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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		break;
1728
	}
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	case FE_READ_BER:
1730 1731
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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		break;

	case FE_READ_SIGNAL_STRENGTH:
1735 1736
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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		break;

	case FE_READ_SNR:
1740 1741
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1745 1746
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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		break;


	case FE_DISEQC_RESET_OVERLOAD:
1751 1752
		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:
1759 1760
		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:
1767 1768
		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:
1775 1776
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1777
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1784 1785
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1786
			fepriv->voltage = (fe_sec_voltage_t) parg;
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1787 1788 1789 1790 1791 1792
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISHNETWORK_SEND_LEGACY_CMD:
1793 1794
		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;
1797
		} else if (fe->ops.set_voltage) {
1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813
			/*
			 * 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
			 */
1814
			unsigned long swcmd = ((unsigned long) parg) << 1;
1815 1816 1817 1818 1819
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1820
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1821 1822 1823 1824 1825 1826
			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
			 */
1827
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1828 1829 1830 1831 1832
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1833
				if ((swcmd & 0x01) != last) {
1834
					/* set voltage to (last ? 13V : 18V) */
1835
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1836 1837
					last = (last) ? 0 : 1;
				}
1838
				swcmd = swcmd >> 1;
1839 1840 1841 1842 1843
				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",
1844
					__func__, fe->dvb->num);
1845 1846 1847 1848 1849 1850
				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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Linus Torvalds 已提交
1851 1852 1853 1854
		}
		break;

	case FE_DISEQC_RECV_SLAVE_REPLY:
1855 1856
		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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1857 1858 1859
		break;

	case FE_ENABLE_HIGH_LNB_VOLTAGE:
1860 1861
		if (fe->ops.enable_high_lnb_voltage)
			err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
L
Linus Torvalds 已提交
1862 1863 1864 1865 1866
		break;

	case FE_SET_FRONTEND: {
		struct dvb_frontend_tune_settings fetunesettings;

1867
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1868 1869 1870 1871 1872 1873 1874 1875 1876
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1877

1878 1879
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1880
			dtv_property_cache_sync(fe, &fepriv->parameters);
1881
		}
L
Linus Torvalds 已提交
1882 1883 1884 1885 1886 1887 1888 1889 1890 1891

		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;
		}
1892
		if (fe->ops.info.type == FE_OFDM) {
1893
			/* without hierarchical coding code_rate_LP is irrelevant,
L
Linus Torvalds 已提交
1894 1895 1896 1897 1898 1899 1900
			 * 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 */
1901
		if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
L
Linus Torvalds 已提交
1902 1903 1904 1905 1906
			fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
			fepriv->max_drift = fetunesettings.max_drift;
			fepriv->step_size = fetunesettings.step_size;
		} else {
			/* default values */
1907
			switch(fe->ops.info.type) {
L
Linus Torvalds 已提交
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921
			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;
1922 1923
				fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
				fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
L
Linus Torvalds 已提交
1924 1925
				break;
			case FE_ATSC:
1926 1927 1928
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0;
				fepriv->max_drift = 0;
L
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1929 1930 1931 1932 1933 1934 1935
				break;
			}
		}
		if (dvb_override_tune_delay > 0)
			fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;

		fepriv->state = FESTATE_RETUNE;
1936 1937 1938 1939

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

L
Linus Torvalds 已提交
1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
		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:
1952
		if (fe->ops.get_frontend) {
L
Linus Torvalds 已提交
1953
			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1954
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
L
Linus Torvalds 已提交
1955 1956
		}
		break;
1957 1958

	case FE_SET_FRONTEND_TUNE_MODE:
1959
		fepriv->tune_mode_flags = (unsigned long) parg;
1960
		err = 0;
1961
		break;
L
Linus Torvalds 已提交
1962 1963 1964 1965 1966
	};

	return err;
}

1967

L
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1968 1969 1970 1971
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;
1972
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1973

1974
	dprintk ("%s\n", __func__);
L
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1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987

	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;
1988
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1989
	struct dvb_adapter *adapter = fe->dvb;
L
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1990 1991
	int ret;

1992
	dprintk ("%s\n", __func__);
L
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1993

1994 1995
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

		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;
2015
				}
2016 2017 2018 2019
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
2020 2021 2022
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
2023 2024 2025 2026
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
2027
				}
2028
				adapter->mfe_dvbdev = dvbdev;
2029 2030 2031 2032
			}
		}
	}

2033 2034
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2035
			goto err0;
2036 2037
	}

2038 2039
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
2040

2041
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2042 2043 2044 2045 2046
		/* 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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2047 2048
		ret = dvb_frontend_start (fe);
		if (ret)
2049
			goto err2;
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		/*  empty event queue */
		fepriv->events.eventr = fepriv->events.eventw = 0;
	}

2055 2056
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
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2057
	return ret;
2058 2059 2060 2061 2062 2063

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
2064 2065 2066
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
2067
	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;
2074
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2075
	int ret;
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2076

2077
	dprintk ("%s\n", __func__);
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	if ((file->f_flags & O_ACCMODE) != O_RDONLY)
		fepriv->release_jiffies = jiffies;

2082 2083
	ret = dvb_generic_release (inode, file);

2084 2085 2086 2087 2088 2089 2090 2091
	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);
2092
	}
2093

2094
	return ret;
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2095 2096
}

2097
static const struct file_operations dvb_frontend_fops = {
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	.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
	};

2117
	dprintk ("%s\n", __func__);
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Linus Torvalds 已提交
2118

2119
	if (mutex_lock_interruptible(&frontend_mutex))
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2120 2121
		return -ERESTARTSYS;

P
 
Panagiotis Issaris 已提交
2122
	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
L
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2123
	if (fe->frontend_priv == NULL) {
2124
		mutex_unlock(&frontend_mutex);
L
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2125 2126
		return -ENOMEM;
	}
2127
	fepriv = fe->frontend_priv;
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2128 2129 2130 2131

	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
2132
	mutex_init(&fepriv->events.mtx);
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2133 2134 2135
	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

2136
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
L
Linus Torvalds 已提交
2137
		fe->dvb->num,
2138
		fe->id,
2139
		fe->ops.info.name);
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2140 2141 2142 2143

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

2144
	mutex_unlock(&frontend_mutex);
L
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2145 2146 2147 2148 2149 2150
	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
2151
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2152
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
2153

2154
	mutex_lock(&frontend_mutex);
2155
	dvb_frontend_stop (fe);
2156 2157 2158 2159 2160 2161
	mutex_unlock(&frontend_mutex);

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

2162
	mutex_lock(&frontend_mutex);
L
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2163
	dvb_unregister_device (fepriv->dvbdev);
2164

L
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2165 2166
	/* fe is invalid now */
	kfree(fepriv);
2167
	mutex_unlock(&frontend_mutex);
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2168 2169 2170
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
2171

2172
#ifdef CONFIG_MEDIA_ATTACH
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184
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);
	}
2185 2186 2187 2188
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201
	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);
2202 2203
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
2204 2205 2206 2207 2208
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);