dvb_frontend.c 60.2 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/smp_lock.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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#define DVB_FE_NO_EXIT	0
#define DVB_FE_NORMAL_EXIT	1
#define DVB_FE_DEVICE_REMOVED	2

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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;

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		/* perform 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 != DVB_FE_NO_EXIT)
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		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... */
559
restart:
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560
		timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
561 562
			dvb_frontend_should_wakeup(fe) || kthread_should_stop()
				|| freezing(current),
563 564 565
			fepriv->delay);

		if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
L
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566
			/* got signal or quitting */
567
			fepriv->exit = DVB_FE_NORMAL_EXIT;
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568 569 570
			break;
		}

571
		if (try_to_freeze())
572
			goto restart;
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573 574 575 576

		if (down_interruptible(&fepriv->sem))
			break;

577 578
		if (fepriv->reinitialise) {
			dvb_frontend_init(fe);
579
			if (fepriv->tone != -1) {
580
				fe->ops.set_tone(fe, fepriv->tone);
581 582
			}
			if (fepriv->voltage != -1) {
583
				fe->ops.set_voltage(fe, fepriv->voltage);
584
			}
585 586 587
			fepriv->reinitialise = 0;
		}

588
		/* do an iteration of the tuning loop */
589
		if (fe->ops.get_frontend_algo) {
M
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590 591 592 593 594 595
			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 ? */

596
				if (fepriv->state & FESTATE_RETUNE) {
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597
					dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
598
					params = &fepriv->parameters;
599 600 601
					fepriv->state = FESTATE_TUNED;
				}

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602 603 604
				if (fe->ops.tune)
					fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);

605
				if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
M
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606
					dprintk("%s: state changed, adding current state\n", __func__);
607 608 609
					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__);
613
				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__);
620
					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) {
628
					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.
						 */
633 634 635
					} else {
						fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
					}
M
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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);
641 642 643 644 645 646 647 648 649 650 651 652 653 654
				} 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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655 656 657 658 659 660 661
				}
				break;
			default:
				dprintk("%s: UNDEFINED ALGO !\n", __func__);
				break;
			}
		} else {
662
			dvb_frontend_swzigzag(fe);
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663
		}
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664 665
	}

666 667 668
	if (dvb_powerdown_on_sleep) {
		if (fe->ops.set_voltage)
			fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
669
		if (fe->ops.tuner_ops.sleep) {
670 671
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 1);
672 673 674
			fe->ops.tuner_ops.sleep(fe);
			if (fe->ops.i2c_gate_ctrl)
				fe->ops.i2c_gate_ctrl(fe, 0);
675
		}
676 677
		if (fe->ops.sleep)
			fe->ops.sleep(fe);
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678 679
	}

680
	fepriv->thread = NULL;
681 682 683 684
	if (kthread_should_stop())
		fepriv->exit = DVB_FE_DEVICE_REMOVED;
	else
		fepriv->exit = DVB_FE_NO_EXIT;
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	mb();

	dvb_frontend_wakeup(fe);
	return 0;
}

static void dvb_frontend_stop(struct dvb_frontend *fe)
{
693
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
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694

695
	dprintk ("%s\n", __func__);
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696

697
	fepriv->exit = DVB_FE_NORMAL_EXIT;
L
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698 699
	mb();

700
	if (!fepriv->thread)
L
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701 702
		return;

703
	kthread_stop(fepriv->thread);
704

705
	init_MUTEX (&fepriv->sem);
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706 707 708
	fepriv->state = FESTATE_IDLE;

	/* paranoia check in case a signal arrived */
709 710 711
	if (fepriv->thread)
		printk("dvb_frontend_stop: warning: thread %p won't exit\n",
				fepriv->thread);
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}

714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
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;
760
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
761
	struct task_struct *fe_thread;
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762

763
	dprintk ("%s\n", __func__);
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764

765
	if (fepriv->thread) {
766
		if (fepriv->exit == DVB_FE_NO_EXIT)
L
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			return 0;
		else
			dvb_frontend_stop (fe);
	}

	if (signal_pending(current))
		return -EINTR;
	if (down_interruptible (&fepriv->sem))
		return -EINTR;

	fepriv->state = FESTATE_IDLE;
778
	fepriv->exit = DVB_FE_NO_EXIT;
779
	fepriv->thread = NULL;
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	mb();

782
	fe_thread = kthread_run(dvb_frontend_thread, fe,
783
		"kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
784 785 786
	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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787 788 789
		up(&fepriv->sem);
		return ret;
	}
790
	fepriv->thread = fe_thread;
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	return 0;
}

794
static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
795 796 797 798 799 800 801 802 803 804 805 806
					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)
807 808
		printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
		       fe->dvb->num,fe->id);
809 810
}

811 812 813
static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
				struct dvb_frontend_parameters *parms)
{
814 815 816
	u32 freq_min;
	u32 freq_max;

817
	/* range check: frequency */
818
	dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
819 820
	if ((freq_min && parms->frequency < freq_min) ||
	    (freq_max && parms->frequency > freq_max)) {
821 822
		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);
823 824 825 826 827 828 829 830 831
		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)) {
832 833
			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,
834 835 836 837 838 839 840 841 842
			       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)) {
843 844
			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,
845 846 847 848 849
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

850 851 852 853 854 855 856 857 858
	/* 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;
	}

859 860 861
	return 0;
}

862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904
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 \
}

905
static struct dtv_cmds_h dtv_cmds[] = {
906 907
	_DTV_CMD(DTV_TUNE, 1, 0),
	_DTV_CMD(DTV_CLEAR, 1, 0),
908 909

	/* Set */
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926
	_DTV_CMD(DTV_FREQUENCY, 1, 0),
	_DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
	_DTV_CMD(DTV_MODULATION, 1, 0),
	_DTV_CMD(DTV_INVERSION, 1, 0),
	_DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
	_DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
	_DTV_CMD(DTV_INNER_FEC, 1, 0),
	_DTV_CMD(DTV_VOLTAGE, 1, 0),
	_DTV_CMD(DTV_TONE, 1, 0),
	_DTV_CMD(DTV_PILOT, 1, 0),
	_DTV_CMD(DTV_ROLLOFF, 1, 0),
	_DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
	_DTV_CMD(DTV_HIERARCHY, 1, 0),
	_DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
	_DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
	_DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
	_DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
927 928 929 930 931 932

	_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),
933
	_DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951
	_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),
952
	_DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
953 954 955 956 957 958 959 960 961 962 963 964 965
	_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),

966 967
	_DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),

968
	/* Get */
969 970 971 972 973 974 975
	_DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
	_DTV_CMD(DTV_API_VERSION, 0, 0),
	_DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
	_DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
	_DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
	_DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
	_DTV_CMD(DTV_HIERARCHY, 0, 0),
976 977
};

978
static void dtv_property_dump(struct dtv_property *tvp)
979 980 981
{
	int i;

982
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
983
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
984 985 986 987
			__func__, tvp->cmd);
		return;
	}

988 989
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
990
		,tvp->cmd
991
		,dtv_cmds[ tvp->cmd ].name);
992

993
	if(dtv_cmds[ tvp->cmd ].buffer) {
994

995 996
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
997 998 999
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
1000 1001
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
1002 1003 1004 1005
				,i
				,tvp->u.buffer.data[i]);

	} else
1006
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1007 1008
}

1009
static int is_legacy_delivery_system(fe_delivery_system_t s)
1010 1011
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1012 1013
	   (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
	   (s == SYS_ATSC))
1014 1015 1016 1017 1018
		return 1;

	return 0;
}

1019 1020 1021 1022
/* 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.
 */
1023 1024
static void dtv_property_cache_sync(struct dvb_frontend *fe,
				    struct dvb_frontend_parameters *p)
1025 1026 1027 1028 1029 1030 1031 1032
{
	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:
1033 1034
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1035 1036
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
1037
		c->delivery_system = SYS_DVBS;
1038 1039 1040 1041 1042
		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;
1043
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1044 1045
		break;
	case FE_OFDM:
1046 1047 1048 1049 1050 1051 1052 1053 1054
		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;
1055 1056 1057 1058 1059 1060
		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;
1061
		c->delivery_system = SYS_DVBT;
1062 1063 1064
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
1065 1066 1067 1068
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1069 1070 1071 1072
		break;
	}
}

1073 1074 1075
/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the advanced tuning API.
 */
1076
static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1077
{
1078 1079 1080
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1081

1082 1083
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1084

1085 1086
	switch (fe->ops.info.type) {
	case FE_QPSK:
1087
		dprintk("%s() Preparing QPSK req\n", __func__);
1088 1089
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1090
		c->delivery_system = SYS_DVBS;
1091 1092
		break;
	case FE_QAM:
1093
		dprintk("%s() Preparing QAM req\n", __func__);
1094 1095 1096
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1097
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1098 1099
		break;
	case FE_OFDM:
1100
		dprintk("%s() Preparing OFDM req\n", __func__);
1101 1102 1103 1104 1105 1106 1107 1108
		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;
1109 1110 1111 1112 1113 1114
		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;
1115
		c->delivery_system = SYS_DVBT;
1116 1117
		break;
	case FE_ATSC:
1118
		dprintk("%s() Preparing VSB req\n", __func__);
1119
		p->u.vsb.modulation = c->modulation;
1120 1121 1122 1123
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1124 1125 1126 1127 1128 1129 1130
		break;
	}
}

/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the legacy tuning API.
 */
1131
static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1132
{
1133
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1134
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1135
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1136

1137 1138 1139 1140
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1141 1142
	case PSK_8:
	case APSK_16:
1143
	case APSK_32:
1144
	case QPSK:
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
		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;
1155
		p->inversion = c->inversion;
1156 1157 1158 1159 1160 1161
		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;
1162 1163 1164 1165 1166 1167 1168 1169
		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;
1170 1171 1172
	}
}

1173
static void dtv_property_cache_submit(struct dvb_frontend *fe)
1174 1175 1176 1177 1178 1179 1180
{
	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.
	 */
1181 1182
	if(is_legacy_delivery_system(c->delivery_system)) {

1183
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1184
		dtv_property_legacy_params_sync(fe);
1185 1186

	} else {
1187
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1188

1189 1190 1191 1192 1193 1194
		/* 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.
		 */
1195
		dtv_property_adv_params_sync(fe);
1196 1197 1198
	}
}

1199
static int dvb_frontend_ioctl_legacy(struct file *file,
1200
			unsigned int cmd, void *parg);
1201
static int dvb_frontend_ioctl_properties(struct file *file,
1202 1203
			unsigned int cmd, void *parg);

1204 1205
static int dtv_property_process_get(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
1206
				    struct file *file)
1207 1208 1209
{
	int r = 0;

1210 1211 1212 1213 1214 1215 1216
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1217 1218 1219 1220 1221 1222 1223
	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;
1224 1225
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
		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;
1251 1252 1253
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1254 1255 1256 1257 1258 1259
	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;
1260 1261 1262 1263 1264 1265
	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;
1266 1267 1268
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285

	/* 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;
1286 1287 1288
	case DTV_ISDBT_LAYER_ENABLED:
		tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
		break;
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
	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;
1325 1326 1327
	case DTV_ISDBS_TS_ID:
		tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
		break;
1328 1329 1330 1331
	default:
		r = -1;
	}

1332 1333
	dtv_property_dump(tvp);

1334 1335 1336
	return r;
}

1337 1338 1339
static int dtv_property_process_set(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct file *file)
1340 1341
{
	int r = 0;
1342
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1343
	dtv_property_dump(tvp);
1344

1345 1346 1347 1348 1349 1350 1351
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1352
	switch(tvp->cmd) {
1353
	case DTV_CLEAR:
1354 1355 1356
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1357
		dvb_frontend_clear_cache(fe);
1358
		dprintk("%s() Flushing property cache\n", __func__);
1359
		break;
1360
	case DTV_TUNE:
1361
		/* interpret the cache of data, build either a traditional frontend
1362 1363
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1364
		 */
1365
		fe->dtv_property_cache.state = tvp->cmd;
1366
		dprintk("%s() Finalised property cache\n", __func__);
1367 1368
		dtv_property_cache_submit(fe);

1369
		r |= dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1370
			&fepriv->parameters);
1371
		break;
1372
	case DTV_FREQUENCY:
1373
		fe->dtv_property_cache.frequency = tvp->u.data;
1374
		break;
1375
	case DTV_MODULATION:
1376
		fe->dtv_property_cache.modulation = tvp->u.data;
1377
		break;
1378 1379
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1380
		break;
1381
	case DTV_INVERSION:
1382
		fe->dtv_property_cache.inversion = tvp->u.data;
1383
		break;
1384
	case DTV_SYMBOL_RATE:
1385
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1386
		break;
1387
	case DTV_INNER_FEC:
1388
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1389
		break;
1390
	case DTV_PILOT:
1391
		fe->dtv_property_cache.pilot = tvp->u.data;
1392
		break;
1393
	case DTV_ROLLOFF:
1394
		fe->dtv_property_cache.rolloff = tvp->u.data;
1395
		break;
1396
	case DTV_DELIVERY_SYSTEM:
1397
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1398
		break;
1399
	case DTV_VOLTAGE:
1400
		fe->dtv_property_cache.voltage = tvp->u.data;
1401
		r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1402
			(void *)fe->dtv_property_cache.voltage);
1403
		break;
1404
	case DTV_TONE:
1405
		fe->dtv_property_cache.sectone = tvp->u.data;
1406
		r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1407
			(void *)fe->dtv_property_cache.sectone);
1408
		break;
1409 1410 1411 1412 1413 1414
	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;
1415 1416 1417 1418 1419 1420
	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;
1421 1422 1423
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440

	/* 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;
1441 1442 1443
	case DTV_ISDBT_LAYER_ENABLED:
		fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
		break;
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479
	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;
1480 1481 1482
	case DTV_ISDBS_TS_ID:
		fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
		break;
1483 1484
	default:
		r = -1;
1485 1486
	}

1487
	return r;
1488 1489
}

1490
static int dvb_frontend_ioctl(struct file *file,
L
Linus Torvalds 已提交
1491 1492 1493 1494
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1495
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1496 1497
	int err = -EOPNOTSUPP;

1498
	dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
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1499

1500
	if (fepriv->exit != DVB_FE_NO_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;

1511
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1512
		err = dvb_frontend_ioctl_properties(file, cmd, parg);
1513 1514
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1515
		err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1516
	}
1517 1518 1519 1520 1521

	up(&fepriv->sem);
	return err;
}

1522
static int dvb_frontend_ioctl_properties(struct file *file,
1523 1524 1525 1526
			unsigned int cmd, void *parg)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1527
	int err = 0;
1528 1529 1530 1531

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1532 1533 1534

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

1535
	if(cmd == FE_SET_PROPERTY) {
1536
		tvps = (struct dtv_properties __user *)parg;
1537

1538 1539
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1540 1541 1542

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1543
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1544 1545
			return -EINVAL;

1546
		tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1547 1548 1549
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1550 1551
		}

1552 1553 1554 1555 1556
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1557
		for (i = 0; i < tvps->num; i++) {
1558
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, file);
1559 1560
			err |= (tvp + i)->result;
		}
1561

1562 1563
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1564

1565 1566 1567 1568 1569
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1570 1571
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1572 1573 1574

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1575
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1576 1577
			return -EINVAL;

1578
		tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
		if (!tvp) {
			err = -ENOMEM;
			goto out;
		}

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

1589
		for (i = 0; i < tvps->num; i++) {
1590
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, file);
1591 1592
			err |= (tvp + i)->result;
		}
1593 1594 1595 1596 1597 1598 1599 1600 1601

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

	} else
		err = -EOPNOTSUPP;

1602 1603
out:
	kfree(tvp);
1604 1605 1606
	return err;
}

1607
static int dvb_frontend_ioctl_legacy(struct file *file,
1608 1609 1610 1611 1612
			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;
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624
	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 */
	}
1625

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	switch (cmd) {
	case FE_GET_INFO: {
1628
		struct dvb_frontend_info* info = parg;
1629
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1630
		dvb_frontend_get_frequency_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;
	}

1639 1640 1641 1642 1643
	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 */
1644 1645
		if (fepriv->state == FESTATE_RETUNE ||
		    fepriv->state == FESTATE_ERROR) {
1646 1647 1648 1649 1650
			err=0;
			*status = 0;
			break;
		}

1651 1652
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
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1653
		break;
1654
	}
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1655
	case FE_READ_BER:
1656 1657
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
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		break;

	case FE_READ_SIGNAL_STRENGTH:
1661 1662
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
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		break;

	case FE_READ_SNR:
1666 1667
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
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1668 1669 1670
		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1671 1672
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
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		break;


	case FE_DISEQC_RESET_OVERLOAD:
1677 1678
		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:
1685 1686
		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:
1693 1694
		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:
1701 1702
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1703
			fepriv->tone = (fe_sec_tone_mode_t) parg;
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1704 1705 1706 1707 1708 1709
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1710 1711
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1712
			fepriv->voltage = (fe_sec_voltage_t) parg;
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1713 1714 1715 1716 1717 1718
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISHNETWORK_SEND_LEGACY_CMD:
1719 1720
		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;
1723
		} else if (fe->ops.set_voltage) {
1724 1725 1726 1727 1728
			/*
			 * 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
1729
			 * other frontends, the following should work ok.
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739
			 * 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
			 */
1740
			unsigned long swcmd = ((unsigned long) parg) << 1;
1741 1742 1743 1744 1745
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1746
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1747 1748 1749 1750 1751 1752
			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
			 */
1753
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1754 1755 1756 1757 1758
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1759
				if ((swcmd & 0x01) != last) {
1760
					/* set voltage to (last ? 13V : 18V) */
1761
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1762 1763
					last = (last) ? 0 : 1;
				}
1764
				swcmd = swcmd >> 1;
1765 1766 1767 1768 1769
				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",
1770
					__func__, fe->dvb->num);
1771 1772 1773 1774 1775 1776
				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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1777 1778 1779 1780
		}
		break;

	case FE_DISEQC_RECV_SLAVE_REPLY:
1781 1782
		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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1783 1784 1785
		break;

	case FE_ENABLE_HIGH_LNB_VOLTAGE:
1786 1787
		if (fe->ops.enable_high_lnb_voltage)
			err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
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1788 1789 1790 1791 1792
		break;

	case FE_SET_FRONTEND: {
		struct dvb_frontend_tune_settings fetunesettings;

1793
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1794 1795 1796 1797 1798 1799 1800 1801 1802
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1803

1804 1805
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1806
			dtv_property_cache_sync(fe, &fepriv->parameters);
1807
		}
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1808 1809 1810 1811 1812 1813 1814 1815 1816 1817

		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;
		}
1818
		if (fe->ops.info.type == FE_OFDM) {
1819
			/* without hierarchical coding code_rate_LP is irrelevant,
L
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1820 1821 1822 1823 1824 1825 1826
			 * 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 */
1827
		if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
L
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1828 1829 1830 1831 1832
			fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
			fepriv->max_drift = fetunesettings.max_drift;
			fepriv->step_size = fetunesettings.step_size;
		} else {
			/* default values */
1833
			switch(fe->ops.info.type) {
L
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1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847
			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;
1848 1849
				fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
				fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
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1850 1851
				break;
			case FE_ATSC:
1852 1853 1854
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0;
				fepriv->max_drift = 0;
L
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1855 1856 1857 1858 1859 1860 1861
				break;
			}
		}
		if (dvb_override_tune_delay > 0)
			fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;

		fepriv->state = FESTATE_RETUNE;
1862 1863 1864 1865

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

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1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877
		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:
1878
		if (fe->ops.get_frontend) {
L
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1879
			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1880
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
L
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1881 1882
		}
		break;
1883 1884

	case FE_SET_FRONTEND_TUNE_MODE:
1885
		fepriv->tune_mode_flags = (unsigned long) parg;
1886
		err = 0;
1887
		break;
L
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1888 1889
	};

1890 1891 1892 1893 1894 1895 1896
	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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1897 1898 1899
	return err;
}

1900

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1901 1902 1903 1904
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;
1905
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
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1906

1907
	dprintk ("%s\n", __func__);
L
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1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920

	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;
1921
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1922
	struct dvb_adapter *adapter = fe->dvb;
L
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1923 1924
	int ret;

1925
	dprintk ("%s\n", __func__);
1926 1927
	if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
		return -ENODEV;
L
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1928

1929 1930
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949

		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;
1950
				}
1951 1952 1953 1954
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
1955 1956 1957
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
1958 1959 1960 1961
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
1962
				}
1963
				adapter->mfe_dvbdev = dvbdev;
1964 1965 1966 1967
			}
		}
	}

1968 1969
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1970
			goto err0;
1971 1972
	}

1973 1974
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1975

1976
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1977 1978 1979 1980 1981
		/* normal tune mode when opened R/W */
		fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
		fepriv->tone = -1;
		fepriv->voltage = -1;

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		ret = dvb_frontend_start (fe);
		if (ret)
1984
			goto err2;
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1985 1986 1987 1988 1989

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

1990 1991
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
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	return ret;
1993 1994 1995 1996 1997 1998

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
1999 2000 2001
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
2002
	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;
2009
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2010
	int ret;
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2012
	dprintk ("%s\n", __func__);
L
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2013 2014 2015 2016

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

2017 2018
	ret = dvb_generic_release (inode, file);

2019
	if (dvbdev->users == -1) {
2020
		if (fepriv->exit != DVB_FE_NO_EXIT) {
2021 2022 2023 2024 2025 2026
			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);
2027
	}
2028

2029
	return ret;
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}

2032
static const struct file_operations dvb_frontend_fops = {
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2033
	.owner		= THIS_MODULE,
2034
	.unlocked_ioctl	= dvb_generic_ioctl,
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	.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
	};

2052
	dprintk ("%s\n", __func__);
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2054
	if (mutex_lock_interruptible(&frontend_mutex))
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		return -ERESTARTSYS;

P
 
Panagiotis Issaris 已提交
2057
	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
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2058
	if (fe->frontend_priv == NULL) {
2059
		mutex_unlock(&frontend_mutex);
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		return -ENOMEM;
	}
2062
	fepriv = fe->frontend_priv;
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	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
2067
	mutex_init(&fepriv->events.mtx);
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	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

2071
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
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		fe->dvb->num,
2073
		fe->id,
2074
		fe->ops.info.name);
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2075 2076 2077 2078

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

2079
	mutex_unlock(&frontend_mutex);
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	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
2086
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2087
	dprintk ("%s\n", __func__);
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2088

2089
	mutex_lock(&frontend_mutex);
2090
	dvb_frontend_stop (fe);
2091 2092 2093 2094 2095 2096
	mutex_unlock(&frontend_mutex);

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

2097
	mutex_lock(&frontend_mutex);
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2098
	dvb_unregister_device (fepriv->dvbdev);
2099

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2100 2101
	/* fe is invalid now */
	kfree(fepriv);
2102
	mutex_unlock(&frontend_mutex);
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2103 2104 2105
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
2106

2107
#ifdef CONFIG_MEDIA_ATTACH
2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119
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);
	}
2120 2121 2122 2123
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
	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);
2137 2138
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
2139 2140 2141 2142 2143
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);