dvb_frontend.c 53.8 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
/*
 * 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>
36
#include <linux/freezer.h>
37
#include <linux/jiffies.h>
38
#include <linux/kthread.h>
L
Linus Torvalds 已提交
39 40 41 42
#include <asm/processor.h>

#include "dvb_frontend.h"
#include "dvbdev.h"
43
#include <linux/dvb/version.h>
L
Linus Torvalds 已提交
44 45

static int dvb_frontend_debug;
46
static int dvb_shutdown_timeout;
L
Linus Torvalds 已提交
47 48 49
static int dvb_force_auto_inversion;
static int dvb_override_tune_delay;
static int dvb_powerdown_on_sleep = 1;
50
static int dvb_mfe_wait_time = 5;
L
Linus Torvalds 已提交
51 52

module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
53
MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
54
module_param(dvb_shutdown_timeout, int, 0644);
L
Linus Torvalds 已提交
55
MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
56
module_param(dvb_force_auto_inversion, int, 0644);
L
Linus Torvalds 已提交
57
MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
58
module_param(dvb_override_tune_delay, int, 0644);
L
Linus Torvalds 已提交
59
MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
60
module_param(dvb_powerdown_on_sleep, int, 0644);
61
MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
62 63
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)");
L
Linus Torvalds 已提交
64 65 66 67 68 69 70 71 72 73 74

#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
75
#define FESTATE_ERROR 256
L
Linus Torvalds 已提交
76 77 78 79
#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)
80 81

#define FE_ALGO_HW		1
L
Linus Torvalds 已提交
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
/*
 * 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.
 */

97
static DEFINE_MUTEX(frontend_mutex);
L
Linus Torvalds 已提交
98 99 100

struct dvb_frontend_private {

101
	/* thread/frontend values */
L
Linus Torvalds 已提交
102 103 104 105 106 107
	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;
108
	struct task_struct *thread;
L
Linus Torvalds 已提交
109
	unsigned long release_jiffies;
110 111
	unsigned int exit;
	unsigned int wakeup;
L
Linus Torvalds 已提交
112
	fe_status_t status;
113
	unsigned long tune_mode_flags;
114
	unsigned int delay;
115
	unsigned int reinitialise;
116 117
	int tone;
	int voltage;
118 119 120 121 122 123 124 125 126 127 128 129 130 131

	/* 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;
M
Manu Abraham 已提交
132
	enum dvbfe_search algo_status;
L
Linus Torvalds 已提交
133 134
};

135
static void dvb_frontend_wakeup(struct dvb_frontend *fe);
L
Linus Torvalds 已提交
136 137 138

static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
{
139
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
140 141 142 143
	struct dvb_fe_events *events = &fepriv->events;
	struct dvb_frontend_event *e;
	int wp;

144
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
145

146
	if (mutex_lock_interruptible (&events->mtx))
L
Linus Torvalds 已提交
147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
		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)
162 163
		if (fe->ops.get_frontend)
			fe->ops.get_frontend(fe, &e->parameters);
L
Linus Torvalds 已提交
164 165 166

	events->eventw = wp;

167
	mutex_unlock(&events->mtx);
L
Linus Torvalds 已提交
168 169 170 171 172 173 174 175 176

	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)
{
177
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
178 179
	struct dvb_fe_events *events = &fepriv->events;

180
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204

	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;
	}

205
	if (mutex_lock_interruptible (&events->mtx))
L
Linus Torvalds 已提交
206 207 208 209 210 211 212
		return -ERESTARTSYS;

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

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

213
	mutex_unlock(&events->mtx);
L
Linus Torvalds 已提交
214 215 216 217 218 219

	return 0;
}

static void dvb_frontend_init(struct dvb_frontend *fe)
{
220
	dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
L
Linus Torvalds 已提交
221
		 fe->dvb->num,
222
		 fe->id,
223 224 225 226 227
		 fe->ops.info.name);

	if (fe->ops.init)
		fe->ops.init(fe);
	if (fe->ops.tuner_ops.init) {
228 229
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);
230 231 232
		fe->ops.tuner_ops.init(fe);
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);
233
	}
L
Linus Torvalds 已提交
234 235
}

236 237 238 239 240 241 242 243 244
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);

245
static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
L
Linus Torvalds 已提交
246
{
247
	int q2;
L
Linus Torvalds 已提交
248

249
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
250

251 252 253 254
	if (locked)
		(fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
	else
		(fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
L
Linus Torvalds 已提交
255

256 257
	q2 = fepriv->quality - 128;
	q2 *= q2;
L
Linus Torvalds 已提交
258

259
	fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
L
Linus Torvalds 已提交
260 261 262 263 264 265 266 267 268
}

/**
 * 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.
 */
269
static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
L
Linus Torvalds 已提交
270 271 272
{
	int autoinversion;
	int ready = 0;
273
	int fe_set_err = 0;
274
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
275 276 277 278
	int original_inversion = fepriv->parameters.inversion;
	u32 original_frequency = fepriv->parameters.frequency;

	/* are we using autoinversion? */
279
	autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
L
Linus Torvalds 已提交
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
			 (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",
342
		__func__, fepriv->lnb_drift, fepriv->inversion,
L
Linus Torvalds 已提交
343 344 345 346 347 348
		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;
349
	if (fe->ops.set_frontend)
350 351 352 353 354
		fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
	if (fe_set_err < 0) {
		fepriv->state = FESTATE_ERROR;
		return fe_set_err;
	}
L
Linus Torvalds 已提交
355 356 357 358 359 360 361 362

	fepriv->parameters.frequency = original_frequency;
	fepriv->parameters.inversion = original_inversion;

	fepriv->auto_sub_step++;
	return 0;
}

363 364
static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
{
365
	fe_status_t s = 0;
366
	int retval = 0;
367 368 369 370 371 372 373 374 375 376 377 378
	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) {
379
			if (fe->ops.set_frontend)
380 381 382 383 384 385
				retval = fe->ops.set_frontend(fe,
							&fepriv->parameters);
			if (retval < 0)
				fepriv->state = FESTATE_ERROR;
			else
				fepriv->state = FESTATE_TUNED;
386 387 388 389 390 391 392 393 394 395
		}
		fepriv->delay = 3*HZ;
		fepriv->quality = 0;
		return;
	}

	/* get the frontend status */
	if (fepriv->state & FESTATE_RETUNE) {
		s = 0;
	} else {
396 397
		if (fe->ops.read_status)
			fe->ops.read_status(fe, &s);
398 399 400 401 402 403 404 405 406 407 408 409
		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 */
410
		if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433
		    (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) &&
434
	    (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462
		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 */
463 464 465 466 467
		retval = dvb_frontend_swzigzag_autotune(fe,
							fepriv->check_wrapped);
		if (retval < 0) {
			return;
		} else if (retval) {
468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
			/* 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);
	}
}

L
Linus Torvalds 已提交
495 496
static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
{
497
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
498 499 500 501 502

	if (fepriv->exit)
		return 1;

	if (fepriv->dvbdev->writers == 1)
503
		if (time_after(jiffies, fepriv->release_jiffies +
504
				  dvb_shutdown_timeout * HZ))
L
Linus Torvalds 已提交
505 506 507 508 509 510 511
			return 1;

	return 0;
}

static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
{
512
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
513 514 515 516 517 518 519 520 521 522

	if (fepriv->wakeup) {
		fepriv->wakeup = 0;
		return 1;
	}
	return dvb_frontend_is_exiting(fe);
}

static void dvb_frontend_wakeup(struct dvb_frontend *fe)
{
523
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
524 525 526 527 528 529 530

	fepriv->wakeup = 1;
	wake_up_interruptible(&fepriv->wait_queue);
}

static int dvb_frontend_thread(void *data)
{
531 532
	struct dvb_frontend *fe = data;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
533 534
	unsigned long timeout;
	fe_status_t s;
M
Manu Abraham 已提交
535 536
	enum dvbfe_algo algo;

537
	struct dvb_frontend_parameters *params;
L
Linus Torvalds 已提交
538

539
	dprintk("%s\n", __func__);
L
Linus Torvalds 已提交
540

541 542 543
	fepriv->check_wrapped = 0;
	fepriv->quality = 0;
	fepriv->delay = 3*HZ;
L
Linus Torvalds 已提交
544 545
	fepriv->status = 0;
	fepriv->wakeup = 0;
546 547 548
	fepriv->reinitialise = 0;

	dvb_frontend_init(fe);
L
Linus Torvalds 已提交
549

550
	set_freezable();
L
Linus Torvalds 已提交
551 552
	while (1) {
		up(&fepriv->sem);	    /* is locked when we enter the thread... */
553
restart:
L
Linus Torvalds 已提交
554
		timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
555 556
			dvb_frontend_should_wakeup(fe) || kthread_should_stop()
				|| freezing(current),
557 558 559
			fepriv->delay);

		if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
L
Linus Torvalds 已提交
560
			/* got signal or quitting */
561
			fepriv->exit = 1;
L
Linus Torvalds 已提交
562 563 564
			break;
		}

565
		if (try_to_freeze())
566
			goto restart;
L
Linus Torvalds 已提交
567 568 569 570

		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) {
M
Manu Abraham 已提交
584 585 586 587 588 589
			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) {
M
Manu Abraham 已提交
591
					dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
592
					params = &fepriv->parameters;
593 594 595
					fepriv->state = FESTATE_TUNED;
				}

M
Manu Abraham 已提交
596 597 598
				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)) {
M
Manu Abraham 已提交
600
					dprintk("%s: state changed, adding current state\n", __func__);
601 602 603
					dvb_frontend_add_event(fe, s);
					fepriv->status = s;
				}
M
Manu Abraham 已提交
604 605 606
				break;
			case DVBFE_ALGO_SW:
				dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
607
				dvb_frontend_swzigzag(fe);
M
Manu Abraham 已提交
608 609 610 611 612 613
				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;
M
Manu Abraham 已提交
615 616 617 618 619 620 621
					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) {
M
Manu Abraham 已提交
623 624 625 626
						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;
					}
M
Manu Abraham 已提交
630 631 632 633 634
				}
				/* 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;
					}
M
Manu Abraham 已提交
649 650 651 652 653 654 655
				}
				break;
			default:
				dprintk("%s: UNDEFINED ALGO !\n", __func__);
				break;
			}
		} else {
656
			dvb_frontend_swzigzag(fe);
M
Manu Abraham 已提交
657
		}
L
Linus Torvalds 已提交
658 659
	}

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);
L
Linus Torvalds 已提交
672 673
	}

674
	fepriv->thread = NULL;
675
	fepriv->exit = 0;
L
Linus Torvalds 已提交
676 677 678 679 680 681 682 683
	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;
L
Linus Torvalds 已提交
685

686
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
687 688 689 690

	fepriv->exit = 1;
	mb();

691
	if (!fepriv->thread)
L
Linus Torvalds 已提交
692 693
		return;

694
	kthread_stop(fepriv->thread);
695

696
	init_MUTEX (&fepriv->sem);
L
Linus Torvalds 已提交
697 698 699
	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);
L
Linus Torvalds 已提交
703 704
}

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);

L
Linus Torvalds 已提交
748 749 750
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;
L
Linus Torvalds 已提交
753

754
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
755

756
	if (fepriv->thread) {
L
Linus Torvalds 已提交
757 758 759 760 761 762 763 764 765 766 767 768 769
		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;
L
Linus Torvalds 已提交
771 772
	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);
L
Linus Torvalds 已提交
778 779 780
		up(&fepriv->sem);
		return ret;
	}
781
	fepriv->thread = fe_thread;
L
Linus Torvalds 已提交
782 783 784
	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,
836 837 838 839 840 841 842 843
			       fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
			return -EINVAL;
		}
	}

	return 0;
}

844
static struct dtv_cmds_h dtv_cmds[] = {
845 846 847
	[DTV_TUNE] = {
		.name	= "DTV_TUNE",
		.cmd	= DTV_TUNE,
848 849
		.set	= 1,
	},
850 851 852
	[DTV_CLEAR] = {
		.name	= "DTV_CLEAR",
		.cmd	= DTV_CLEAR,
853 854 855 856
		.set	= 1,
	},

	/* Set */
857 858 859
	[DTV_FREQUENCY] = {
		.name	= "DTV_FREQUENCY",
		.cmd	= DTV_FREQUENCY,
860 861
		.set	= 1,
	},
862 863 864
	[DTV_BANDWIDTH_HZ] = {
		.name	= "DTV_BANDWIDTH_HZ",
		.cmd	= DTV_BANDWIDTH_HZ,
865 866
		.set	= 1,
	},
867 868 869
	[DTV_MODULATION] = {
		.name	= "DTV_MODULATION",
		.cmd	= DTV_MODULATION,
870 871
		.set	= 1,
	},
872 873 874
	[DTV_INVERSION] = {
		.name	= "DTV_INVERSION",
		.cmd	= DTV_INVERSION,
875 876
		.set	= 1,
	},
877 878 879
	[DTV_DISEQC_MASTER] = {
		.name	= "DTV_DISEQC_MASTER",
		.cmd	= DTV_DISEQC_MASTER,
880 881 882
		.set	= 1,
		.buffer	= 1,
	},
883 884 885
	[DTV_SYMBOL_RATE] = {
		.name	= "DTV_SYMBOL_RATE",
		.cmd	= DTV_SYMBOL_RATE,
886 887
		.set	= 1,
	},
888 889 890
	[DTV_INNER_FEC] = {
		.name	= "DTV_INNER_FEC",
		.cmd	= DTV_INNER_FEC,
891 892
		.set	= 1,
	},
893 894 895
	[DTV_VOLTAGE] = {
		.name	= "DTV_VOLTAGE",
		.cmd	= DTV_VOLTAGE,
896 897
		.set	= 1,
	},
898 899 900
	[DTV_TONE] = {
		.name	= "DTV_TONE",
		.cmd	= DTV_TONE,
901 902
		.set	= 1,
	},
903 904 905
	[DTV_PILOT] = {
		.name	= "DTV_PILOT",
		.cmd	= DTV_PILOT,
906 907
		.set	= 1,
	},
908 909 910
	[DTV_ROLLOFF] = {
		.name	= "DTV_ROLLOFF",
		.cmd	= DTV_ROLLOFF,
911 912
		.set	= 1,
	},
913 914 915
	[DTV_DELIVERY_SYSTEM] = {
		.name	= "DTV_DELIVERY_SYSTEM",
		.cmd	= DTV_DELIVERY_SYSTEM,
916 917
		.set	= 1,
	},
918 919 920 921 922
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 1,
	},
923 924 925 926 927 928 929 930 931 932
	[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,
	},
933 934 935 936 937 938 939 940 941 942
	[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,
	},
943
	/* Get */
944 945 946
	[DTV_DISEQC_SLAVE_REPLY] = {
		.name	= "DTV_DISEQC_SLAVE_REPLY",
		.cmd	= DTV_DISEQC_SLAVE_REPLY,
947 948 949
		.set	= 0,
		.buffer	= 1,
	},
950 951 952 953 954
	[DTV_API_VERSION] = {
		.name	= "DTV_API_VERSION",
		.cmd	= DTV_API_VERSION,
		.set	= 0,
	},
955 956 957 958 959 960 961 962 963 964
	[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,
	},
965 966 967 968 969 970 971 972 973 974
	[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,
	},
975 976 977 978 979
	[DTV_HIERARCHY] = {
		.name	= "DTV_HIERARCHY",
		.cmd	= DTV_HIERARCHY,
		.set	= 0,
	},
980 981
};

982
static void dtv_property_dump(struct dtv_property *tvp)
983 984 985
{
	int i;

986
	if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
987
		printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
988 989 990 991
			__func__, tvp->cmd);
		return;
	}

992 993
	dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
		,__func__
994
		,tvp->cmd
995
		,dtv_cmds[ tvp->cmd ].name);
996

997
	if(dtv_cmds[ tvp->cmd ].buffer) {
998

999 1000
		dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
			,__func__
1001 1002 1003
			,tvp->u.buffer.len);

		for(i = 0; i < tvp->u.buffer.len; i++)
1004 1005
			dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
				,__func__
1006 1007 1008 1009
				,i
				,tvp->u.buffer.data[i]);

	} else
1010
		dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1011 1012
}

1013
static int is_legacy_delivery_system(fe_delivery_system_t s)
1014 1015
{
	if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1016 1017
	   (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
	   (s == SYS_ATSC))
1018 1019 1020 1021 1022
		return 1;

	return 0;
}

1023 1024 1025 1026
/* 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.
 */
1027 1028
static void dtv_property_cache_sync(struct dvb_frontend *fe,
				    struct dvb_frontend_parameters *p)
1029 1030 1031 1032 1033 1034 1035 1036
{
	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:
1037 1038
		c->modulation = QPSK;   /* implied for DVB-S in legacy API */
		c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1039 1040
		c->symbol_rate = p->u.qpsk.symbol_rate;
		c->fec_inner = p->u.qpsk.fec_inner;
1041
		c->delivery_system = SYS_DVBS;
1042 1043 1044 1045 1046
		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;
1047
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1048 1049
		break;
	case FE_OFDM:
1050 1051 1052 1053 1054 1055 1056 1057 1058
		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;
1059 1060 1061 1062 1063 1064
		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;
1065
		c->delivery_system = SYS_DVBT;
1066 1067 1068
		break;
	case FE_ATSC:
		c->modulation = p->u.vsb.modulation;
1069 1070 1071 1072
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1073 1074 1075 1076
		break;
	}
}

1077 1078 1079
/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the advanced tuning API.
 */
1080
static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1081
{
1082 1083 1084
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1085

1086 1087
	p->frequency = c->frequency;
	p->inversion = c->inversion;
1088

1089 1090
	switch (fe->ops.info.type) {
	case FE_QPSK:
1091
		dprintk("%s() Preparing QPSK req\n", __func__);
1092 1093
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
1094
		c->delivery_system = SYS_DVBS;
1095 1096
		break;
	case FE_QAM:
1097
		dprintk("%s() Preparing QAM req\n", __func__);
1098 1099 1100
		p->u.qam.symbol_rate = c->symbol_rate;
		p->u.qam.fec_inner = c->fec_inner;
		p->u.qam.modulation = c->modulation;
1101
		c->delivery_system = SYS_DVBC_ANNEX_AC;
1102 1103
		break;
	case FE_OFDM:
1104
		dprintk("%s() Preparing OFDM req\n", __func__);
1105 1106 1107 1108 1109 1110 1111 1112
		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;
1113 1114 1115 1116 1117 1118
		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;
1119
		c->delivery_system = SYS_DVBT;
1120 1121
		break;
	case FE_ATSC:
1122
		dprintk("%s() Preparing VSB req\n", __func__);
1123
		p->u.vsb.modulation = c->modulation;
1124 1125 1126 1127
		if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
			c->delivery_system = SYS_ATSC;
		else
			c->delivery_system = SYS_DVBC_ANNEX_B;
1128 1129 1130 1131 1132 1133 1134
		break;
	}
}

/* Ensure the cached values are set correctly in the frontend
 * legacy tuning structures, for the legacy tuning API.
 */
1135
static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1136
{
1137
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1138
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1139
	struct dvb_frontend_parameters *p = &fepriv->parameters;
1140

1141 1142 1143 1144
	p->frequency = c->frequency;
	p->inversion = c->inversion;

	switch(c->modulation) {
1145 1146
	case PSK_8:
	case APSK_16:
1147
	case APSK_32:
1148
	case QPSK:
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
		p->u.qpsk.symbol_rate = c->symbol_rate;
		p->u.qpsk.fec_inner = c->fec_inner;
		break;
	default:
		break;
	}

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

1170
static void dtv_property_cache_submit(struct dvb_frontend *fe)
1171 1172 1173 1174 1175 1176 1177
{
	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.
	 */
1178 1179
	if(is_legacy_delivery_system(c->delivery_system)) {

1180
		dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1181
		dtv_property_legacy_params_sync(fe);
1182 1183

	} else {
1184
		dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1185

1186 1187 1188 1189 1190 1191
		/* 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.
		 */
1192
		dtv_property_adv_params_sync(fe);
1193 1194 1195
	}
}

1196 1197 1198 1199 1200
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);

1201 1202 1203
static int dtv_property_process_get(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct inode *inode, struct file *file)
1204 1205 1206 1207 1208
{
	int r = 0;

	dtv_property_dump(tvp);

1209 1210 1211 1212 1213 1214 1215
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.get_property)
		r = fe->ops.get_property(fe, tvp);

	if (r < 0)
		return r;

1216 1217 1218 1219 1220 1221 1222
	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;
1223 1224
	case DTV_BANDWIDTH_HZ:
		tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
		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;
1250 1251 1252
	case DTV_API_VERSION:
		tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
		break;
1253 1254 1255 1256 1257 1258
	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;
1259 1260 1261 1262 1263 1264
	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;
1265 1266 1267
	case DTV_HIERARCHY:
		tvp->u.data = fe->dtv_property_cache.hierarchy;
		break;
1268 1269 1270 1271 1272 1273 1274
	default:
		r = -1;
	}

	return r;
}

1275 1276 1277 1278
static int dtv_property_process_set(struct dvb_frontend *fe,
				    struct dtv_property *tvp,
				    struct inode *inode,
				    struct file *file)
1279 1280
{
	int r = 0;
1281
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1282
	dtv_property_dump(tvp);
1283

1284 1285 1286 1287 1288 1289 1290
	/* Allow the frontend to validate incoming properties */
	if (fe->ops.set_property)
		r = fe->ops.set_property(fe, tvp);

	if (r < 0)
		return r;

1291
	switch(tvp->cmd) {
1292
	case DTV_CLEAR:
1293 1294 1295
		/* Reset a cache of data specific to the frontend here. This does
		 * not effect hardware.
		 */
1296
		dprintk("%s() Flushing property cache\n", __func__);
1297
		memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1298
		fe->dtv_property_cache.state = tvp->cmd;
1299
		fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1300
		break;
1301
	case DTV_TUNE:
1302
		/* interpret the cache of data, build either a traditional frontend
1303 1304
		 * tunerequest so we can pass validation in the FE_SET_FRONTEND
		 * ioctl.
1305
		 */
1306
		fe->dtv_property_cache.state = tvp->cmd;
1307
		dprintk("%s() Finalised property cache\n", __func__);
1308 1309
		dtv_property_cache_submit(fe);

1310 1311
		r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
			&fepriv->parameters);
1312
		break;
1313
	case DTV_FREQUENCY:
1314
		fe->dtv_property_cache.frequency = tvp->u.data;
1315
		break;
1316
	case DTV_MODULATION:
1317
		fe->dtv_property_cache.modulation = tvp->u.data;
1318
		break;
1319 1320
	case DTV_BANDWIDTH_HZ:
		fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1321
		break;
1322
	case DTV_INVERSION:
1323
		fe->dtv_property_cache.inversion = tvp->u.data;
1324
		break;
1325
	case DTV_SYMBOL_RATE:
1326
		fe->dtv_property_cache.symbol_rate = tvp->u.data;
1327
		break;
1328
	case DTV_INNER_FEC:
1329
		fe->dtv_property_cache.fec_inner = tvp->u.data;
1330
		break;
1331
	case DTV_PILOT:
1332
		fe->dtv_property_cache.pilot = tvp->u.data;
1333
		break;
1334
	case DTV_ROLLOFF:
1335
		fe->dtv_property_cache.rolloff = tvp->u.data;
1336
		break;
1337
	case DTV_DELIVERY_SYSTEM:
1338
		fe->dtv_property_cache.delivery_system = tvp->u.data;
1339
		break;
1340
	case DTV_VOLTAGE:
1341
		fe->dtv_property_cache.voltage = tvp->u.data;
1342
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1343
			(void *)fe->dtv_property_cache.voltage);
1344
		break;
1345
	case DTV_TONE:
1346
		fe->dtv_property_cache.sectone = tvp->u.data;
1347
		r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1348
			(void *)fe->dtv_property_cache.sectone);
1349
		break;
1350 1351 1352 1353 1354 1355
	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;
1356 1357 1358 1359 1360 1361
	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;
1362 1363 1364
	case DTV_HIERARCHY:
		fe->dtv_property_cache.hierarchy = tvp->u.data;
		break;
1365 1366
	default:
		r = -1;
1367 1368
	}

1369
	return r;
1370 1371
}

L
Linus Torvalds 已提交
1372 1373 1374 1375 1376
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;
1377
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1378 1379
	int err = -EOPNOTSUPP;

1380
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1381

1382
	if (fepriv->exit)
L
Linus Torvalds 已提交
1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
		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;

1393 1394
	if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
		err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1395 1396
	else {
		fe->dtv_property_cache.state = DTV_UNDEFINED;
1397
		err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1398
	}
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408

	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;
1409
	int err = 0;
1410 1411 1412 1413

	struct dtv_properties *tvps = NULL;
	struct dtv_property *tvp = NULL;
	int i;
1414 1415 1416

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

1417
	if(cmd == FE_SET_PROPERTY) {
1418
		tvps = (struct dtv_properties __user *)parg;
1419

1420 1421
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1422 1423 1424

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1425
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1426 1427 1428 1429 1430 1431 1432
			return -EINVAL;

		tvp = (struct dtv_property *) kmalloc(tvps->num *
			sizeof(struct dtv_property), GFP_KERNEL);
		if (!tvp) {
			err = -ENOMEM;
			goto out;
1433 1434
		}

1435 1436 1437 1438 1439
		if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
			err = -EFAULT;
			goto out;
		}

1440 1441 1442 1443
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1444

1445 1446
		if(fe->dtv_property_cache.state == DTV_TUNE)
			dprintk("%s() Property cache is full, tuning\n", __func__);
1447

1448 1449 1450 1451 1452
	} else
	if(cmd == FE_GET_PROPERTY) {

		tvps = (struct dtv_properties __user *)parg;

1453 1454
		dprintk("%s() properties.num = %d\n", __func__, tvps->num);
		dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1455 1456 1457

		/* Put an arbitrary limit on the number of messages that can
		 * be sent at once */
1458
		if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472
			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;
		}

1473 1474 1475 1476
		for (i = 0; i < tvps->num; i++) {
			(tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
			err |= (tvp + i)->result;
		}
1477 1478 1479 1480 1481 1482 1483 1484 1485

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

	} else
		err = -EOPNOTSUPP;

1486 1487
out:
	kfree(tvp);
1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
	return err;
}

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

L
Linus Torvalds 已提交
1499 1500
	switch (cmd) {
	case FE_GET_INFO: {
1501
		struct dvb_frontend_info* info = parg;
1502
		memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1503
		dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
L
Linus Torvalds 已提交
1504 1505 1506 1507 1508 1509 1510 1511

		/* 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;
	}

1512 1513 1514 1515 1516
	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 */
1517 1518
		if (fepriv->state == FESTATE_RETUNE ||
		    fepriv->state == FESTATE_ERROR) {
1519 1520 1521 1522 1523
			err=0;
			*status = 0;
			break;
		}

1524 1525
		if (fe->ops.read_status)
			err = fe->ops.read_status(fe, status);
L
Linus Torvalds 已提交
1526
		break;
1527
	}
L
Linus Torvalds 已提交
1528
	case FE_READ_BER:
1529 1530
		if (fe->ops.read_ber)
			err = fe->ops.read_ber(fe, (__u32*) parg);
L
Linus Torvalds 已提交
1531 1532 1533
		break;

	case FE_READ_SIGNAL_STRENGTH:
1534 1535
		if (fe->ops.read_signal_strength)
			err = fe->ops.read_signal_strength(fe, (__u16*) parg);
L
Linus Torvalds 已提交
1536 1537 1538
		break;

	case FE_READ_SNR:
1539 1540
		if (fe->ops.read_snr)
			err = fe->ops.read_snr(fe, (__u16*) parg);
L
Linus Torvalds 已提交
1541 1542 1543
		break;

	case FE_READ_UNCORRECTED_BLOCKS:
1544 1545
		if (fe->ops.read_ucblocks)
			err = fe->ops.read_ucblocks(fe, (__u32*) parg);
L
Linus Torvalds 已提交
1546 1547 1548 1549
		break;


	case FE_DISEQC_RESET_OVERLOAD:
1550 1551
		if (fe->ops.diseqc_reset_overload) {
			err = fe->ops.diseqc_reset_overload(fe);
L
Linus Torvalds 已提交
1552 1553 1554 1555 1556 1557
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_MASTER_CMD:
1558 1559
		if (fe->ops.diseqc_send_master_cmd) {
			err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
L
Linus Torvalds 已提交
1560 1561 1562 1563 1564 1565
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISEQC_SEND_BURST:
1566 1567
		if (fe->ops.diseqc_send_burst) {
			err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
L
Linus Torvalds 已提交
1568 1569 1570 1571 1572 1573
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_TONE:
1574 1575
		if (fe->ops.set_tone) {
			err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1576
			fepriv->tone = (fe_sec_tone_mode_t) parg;
L
Linus Torvalds 已提交
1577 1578 1579 1580 1581 1582
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_SET_VOLTAGE:
1583 1584
		if (fe->ops.set_voltage) {
			err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1585
			fepriv->voltage = (fe_sec_voltage_t) parg;
L
Linus Torvalds 已提交
1586 1587 1588 1589 1590 1591
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
		}
		break;

	case FE_DISHNETWORK_SEND_LEGACY_CMD:
1592 1593
		if (fe->ops.dishnetwork_send_legacy_command) {
			err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
L
Linus Torvalds 已提交
1594 1595
			fepriv->state = FESTATE_DISEQC;
			fepriv->status = 0;
1596
		} else if (fe->ops.set_voltage) {
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612
			/*
			 * 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
			 */
1613
			unsigned long swcmd = ((unsigned long) parg) << 1;
1614 1615 1616 1617 1618
			struct timeval nexttime;
			struct timeval tv[10];
			int i;
			u8 last = 1;
			if (dvb_frontend_debug)
1619
				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1620 1621 1622 1623 1624 1625
			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
			 */
1626
			fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1627 1628 1629 1630 1631
			dvb_frontend_sleep_until(&nexttime, 32000);

			for (i = 0; i < 9; i++) {
				if (dvb_frontend_debug)
					do_gettimeofday(&tv[i + 1]);
1632
				if ((swcmd & 0x01) != last) {
1633
					/* set voltage to (last ? 13V : 18V) */
1634
					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1635 1636
					last = (last) ? 0 : 1;
				}
1637
				swcmd = swcmd >> 1;
1638 1639 1640 1641 1642
				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",
1643
					__func__, fe->dvb->num);
1644 1645 1646 1647 1648 1649
				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;
L
Linus Torvalds 已提交
1650 1651 1652 1653
		}
		break;

	case FE_DISEQC_RECV_SLAVE_REPLY:
1654 1655
		if (fe->ops.diseqc_recv_slave_reply)
			err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
L
Linus Torvalds 已提交
1656 1657 1658
		break;

	case FE_ENABLE_HIGH_LNB_VOLTAGE:
1659 1660
		if (fe->ops.enable_high_lnb_voltage)
			err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
L
Linus Torvalds 已提交
1661 1662 1663 1664 1665
		break;

	case FE_SET_FRONTEND: {
		struct dvb_frontend_tune_settings fetunesettings;

1666
		if(fe->dtv_property_cache.state == DTV_TUNE) {
1667 1668 1669 1670 1671 1672 1673 1674 1675
			if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
				err = -EINVAL;
				break;
			}
		} else {
			if (dvb_frontend_check_parameters(fe, parg) < 0) {
				err = -EINVAL;
				break;
			}
1676

1677 1678
			memcpy (&fepriv->parameters, parg,
				sizeof (struct dvb_frontend_parameters));
1679
			dtv_property_cache_sync(fe, &fepriv->parameters);
1680
		}
L
Linus Torvalds 已提交
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690

		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;
		}
1691
		if (fe->ops.info.type == FE_OFDM) {
1692
			/* without hierarchical coding code_rate_LP is irrelevant,
L
Linus Torvalds 已提交
1693 1694 1695 1696 1697 1698 1699
			 * 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 */
1700
		if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
L
Linus Torvalds 已提交
1701 1702 1703 1704 1705
			fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
			fepriv->max_drift = fetunesettings.max_drift;
			fepriv->step_size = fetunesettings.step_size;
		} else {
			/* default values */
1706
			switch(fe->ops.info.type) {
L
Linus Torvalds 已提交
1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720
			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;
1721 1722
				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
1723 1724
				break;
			case FE_ATSC:
1725 1726 1727
				fepriv->min_delay = HZ/20;
				fepriv->step_size = 0;
				fepriv->max_drift = 0;
L
Linus Torvalds 已提交
1728 1729 1730 1731 1732 1733 1734
				break;
			}
		}
		if (dvb_override_tune_delay > 0)
			fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;

		fepriv->state = FESTATE_RETUNE;
1735 1736 1737 1738

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

L
Linus Torvalds 已提交
1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750
		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:
1751
		if (fe->ops.get_frontend) {
L
Linus Torvalds 已提交
1752
			memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1753
			err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
L
Linus Torvalds 已提交
1754 1755
		}
		break;
1756 1757

	case FE_SET_FRONTEND_TUNE_MODE:
1758
		fepriv->tune_mode_flags = (unsigned long) parg;
1759
		err = 0;
1760
		break;
L
Linus Torvalds 已提交
1761 1762 1763 1764 1765
	};

	return err;
}

1766

L
Linus Torvalds 已提交
1767 1768 1769 1770
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;
1771
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1772

1773
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786

	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;
1787
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1788
	struct dvb_adapter *adapter = fe->dvb;
L
Linus Torvalds 已提交
1789 1790
	int ret;

1791
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1792

1793 1794
	if (adapter->mfe_shared) {
		mutex_lock (&adapter->mfe_lock);
1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813

		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;
1814
				}
1815 1816 1817 1818
			}

			mutex_lock (&adapter->mfe_lock);
			if(adapter->mfe_dvbdev != dvbdev) {
1819 1820 1821
				mfedev = adapter->mfe_dvbdev;
				mfe = mfedev->priv;
				mfepriv = mfe->frontend_priv;
1822 1823 1824 1825
				if (mfedev->users != -1 ||
						mfepriv->thread != NULL) {
					mutex_unlock (&adapter->mfe_lock);
					return -EBUSY;
1826
				}
1827
				adapter->mfe_dvbdev = dvbdev;
1828 1829 1830 1831
			}
		}
	}

1832 1833
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
		if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1834
			goto err0;
1835 1836
	}

1837 1838
	if ((ret = dvb_generic_open (inode, file)) < 0)
		goto err1;
1839

1840
	if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1841 1842 1843 1844 1845
		/* normal tune mode when opened R/W */
		fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
		fepriv->tone = -1;
		fepriv->voltage = -1;

L
Linus Torvalds 已提交
1846 1847
		ret = dvb_frontend_start (fe);
		if (ret)
1848
			goto err2;
L
Linus Torvalds 已提交
1849 1850 1851 1852 1853

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

1854 1855
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
L
Linus Torvalds 已提交
1856
	return ret;
1857 1858 1859 1860 1861 1862

err2:
	dvb_generic_release(inode, file);
err1:
	if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
		fe->ops.ts_bus_ctrl(fe, 0);
1863 1864 1865
err0:
	if (adapter->mfe_shared)
		mutex_unlock (&adapter->mfe_lock);
1866
	return ret;
L
Linus Torvalds 已提交
1867 1868 1869 1870 1871 1872
}

static int dvb_frontend_release(struct inode *inode, struct file *file)
{
	struct dvb_device *dvbdev = file->private_data;
	struct dvb_frontend *fe = dvbdev->priv;
1873
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1874
	int ret;
L
Linus Torvalds 已提交
1875

1876
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1877 1878 1879 1880

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

1881 1882
	ret = dvb_generic_release (inode, file);

1883 1884 1885 1886 1887 1888 1889 1890
	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);
1891
	}
1892

1893
	return ret;
L
Linus Torvalds 已提交
1894 1895
}

1896
static const struct file_operations dvb_frontend_fops = {
L
Linus Torvalds 已提交
1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
	.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
	};

1916
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1917

1918
	if (mutex_lock_interruptible(&frontend_mutex))
L
Linus Torvalds 已提交
1919 1920
		return -ERESTARTSYS;

P
 
Panagiotis Issaris 已提交
1921
	fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
L
Linus Torvalds 已提交
1922
	if (fe->frontend_priv == NULL) {
1923
		mutex_unlock(&frontend_mutex);
L
Linus Torvalds 已提交
1924 1925
		return -ENOMEM;
	}
1926
	fepriv = fe->frontend_priv;
L
Linus Torvalds 已提交
1927 1928 1929 1930

	init_MUTEX (&fepriv->sem);
	init_waitqueue_head (&fepriv->wait_queue);
	init_waitqueue_head (&fepriv->events.wait_queue);
1931
	mutex_init(&fepriv->events.mtx);
L
Linus Torvalds 已提交
1932 1933 1934
	fe->dvb = dvb;
	fepriv->inversion = INVERSION_OFF;

1935
	printk ("DVB: registering adapter %i frontend %i (%s)...\n",
L
Linus Torvalds 已提交
1936
		fe->dvb->num,
1937
		fe->id,
1938
		fe->ops.info.name);
L
Linus Torvalds 已提交
1939 1940 1941 1942

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

1943
	mutex_unlock(&frontend_mutex);
L
Linus Torvalds 已提交
1944 1945 1946 1947 1948 1949
	return 0;
}
EXPORT_SYMBOL(dvb_register_frontend);

int dvb_unregister_frontend(struct dvb_frontend* fe)
{
1950
	struct dvb_frontend_private *fepriv = fe->frontend_priv;
1951
	dprintk ("%s\n", __func__);
L
Linus Torvalds 已提交
1952

1953
	mutex_lock(&frontend_mutex);
1954
	dvb_frontend_stop (fe);
1955 1956 1957 1958 1959 1960
	mutex_unlock(&frontend_mutex);

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

1961
	mutex_lock(&frontend_mutex);
L
Linus Torvalds 已提交
1962
	dvb_unregister_device (fepriv->dvbdev);
1963

L
Linus Torvalds 已提交
1964 1965
	/* fe is invalid now */
	kfree(fepriv);
1966
	mutex_unlock(&frontend_mutex);
L
Linus Torvalds 已提交
1967 1968 1969
	return 0;
}
EXPORT_SYMBOL(dvb_unregister_frontend);
1970

1971
#ifdef CONFIG_MEDIA_ATTACH
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983
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);
	}
1984 1985 1986 1987
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
	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);
2001 2002
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
2003 2004 2005 2006 2007
	if (fe->ops.release)
		fe->ops.release(fe);
}
#endif
EXPORT_SYMBOL(dvb_frontend_detach);