Free Electrons

Embedded Linux Experts

  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
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
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
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
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
463
464
465
466
467
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
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
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
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
/*
 * Earthsoft PT3 driver
 *
 * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
 *
 * 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 version 2.
 *
 *
 * 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.
 */

#include <linux/freezer.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/sched/signal.h>

#include "dmxdev.h"
#include "dvbdev.h"
#include "dvb_demux.h"
#include "dvb_frontend.h"

#include "pt3.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static bool one_adapter;
module_param(one_adapter, bool, 0444);
MODULE_PARM_DESC(one_adapter, "Place FE's together under one adapter.");

static int num_bufs = 4;
module_param(num_bufs, int, 0444);
MODULE_PARM_DESC(num_bufs, "Number of DMA buffer (188KiB) per FE.");


static const struct i2c_algorithm pt3_i2c_algo = {
	.master_xfer   = &pt3_i2c_master_xfer,
	.functionality = &pt3_i2c_functionality,
};

static const struct pt3_adap_config adap_conf[PT3_NUM_FE] = {
	{
		.demod_info = {
			I2C_BOARD_INFO(TC90522_I2C_DEV_SAT, 0x11),
		},
		.tuner_info = {
			I2C_BOARD_INFO("qm1d1c0042", 0x63),
		},
		.tuner_cfg.qm1d1c0042 = {
			.lpf = 1,
		},
		.init_freq = 1049480 - 300,
	},
	{
		.demod_info = {
			I2C_BOARD_INFO(TC90522_I2C_DEV_TER, 0x10),
		},
		.tuner_info = {
			I2C_BOARD_INFO("mxl301rf", 0x62),
		},
		.init_freq = 515142857,
	},
	{
		.demod_info = {
			I2C_BOARD_INFO(TC90522_I2C_DEV_SAT, 0x13),
		},
		.tuner_info = {
			I2C_BOARD_INFO("qm1d1c0042", 0x60),
		},
		.tuner_cfg.qm1d1c0042 = {
			.lpf = 1,
		},
		.init_freq = 1049480 + 300,
	},
	{
		.demod_info = {
			I2C_BOARD_INFO(TC90522_I2C_DEV_TER, 0x12),
		},
		.tuner_info = {
			I2C_BOARD_INFO("mxl301rf", 0x61),
		},
		.init_freq = 521142857,
	},
};


struct reg_val {
	u8 reg;
	u8 val;
};

static int
pt3_demod_write(struct pt3_adapter *adap, const struct reg_val *data, int num)
{
	struct i2c_msg msg;
	int i, ret;

	ret = 0;
	msg.addr = adap->i2c_demod->addr;
	msg.flags = 0;
	msg.len = 2;
	for (i = 0; i < num; i++) {
		msg.buf = (u8 *)&data[i];
		ret = i2c_transfer(adap->i2c_demod->adapter, &msg, 1);
		if (ret == 0)
			ret = -EREMOTE;
		if (ret < 0)
			return ret;
	}
	return 0;
}

static inline void pt3_lnb_ctrl(struct pt3_board *pt3, bool on)
{
	iowrite32((on ? 0x0f : 0x0c), pt3->regs[0] + REG_SYSTEM_W);
}

static inline struct pt3_adapter *pt3_find_adapter(struct dvb_frontend *fe)
{
	struct pt3_board *pt3;
	int i;

	if (one_adapter) {
		pt3 = fe->dvb->priv;
		for (i = 0; i < PT3_NUM_FE; i++)
			if (pt3->adaps[i]->fe == fe)
				return pt3->adaps[i];
	}
	return container_of(fe->dvb, struct pt3_adapter, dvb_adap);
}

/*
 * all 4 tuners in PT3 are packaged in a can module (Sharp VA4M6JC2103).
 * it seems that they share the power lines and Amp power line and
 * adaps[3] controls those powers.
 */
static int
pt3_set_tuner_power(struct pt3_board *pt3, bool tuner_on, bool amp_on)
{
	struct reg_val rv = { 0x1e, 0x99 };

	if (tuner_on)
		rv.val |= 0x40;
	if (amp_on)
		rv.val |= 0x04;
	return pt3_demod_write(pt3->adaps[PT3_NUM_FE - 1], &rv, 1);
}

static int pt3_set_lna(struct dvb_frontend *fe)
{
	struct pt3_adapter *adap;
	struct pt3_board *pt3;
	u32 val;
	int ret;

	/* LNA is shared btw. 2 TERR-tuners */

	adap = pt3_find_adapter(fe);
	val = fe->dtv_property_cache.lna;
	if (val == LNA_AUTO || val == adap->cur_lna)
		return 0;

	pt3 = adap->dvb_adap.priv;
	if (mutex_lock_interruptible(&pt3->lock))
		return -ERESTARTSYS;
	if (val)
		pt3->lna_on_cnt++;
	else
		pt3->lna_on_cnt--;

	if (val && pt3->lna_on_cnt <= 1) {
		pt3->lna_on_cnt = 1;
		ret = pt3_set_tuner_power(pt3, true, true);
	} else if (!val && pt3->lna_on_cnt <= 0) {
		pt3->lna_on_cnt = 0;
		ret = pt3_set_tuner_power(pt3, true, false);
	} else
		ret = 0;
	mutex_unlock(&pt3->lock);
	adap->cur_lna = (val != 0);
	return ret;
}

static int pt3_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage volt)
{
	struct pt3_adapter *adap;
	struct pt3_board *pt3;
	bool on;

	/* LNB power is shared btw. 2 SAT-tuners */

	adap = pt3_find_adapter(fe);
	on = (volt != SEC_VOLTAGE_OFF);
	if (on == adap->cur_lnb)
		return 0;
	adap->cur_lnb = on;
	pt3 = adap->dvb_adap.priv;
	if (mutex_lock_interruptible(&pt3->lock))
		return -ERESTARTSYS;
	if (on)
		pt3->lnb_on_cnt++;
	else
		pt3->lnb_on_cnt--;

	if (on && pt3->lnb_on_cnt <= 1) {
		pt3->lnb_on_cnt = 1;
		pt3_lnb_ctrl(pt3, true);
	} else if (!on && pt3->lnb_on_cnt <= 0) {
		pt3->lnb_on_cnt = 0;
		pt3_lnb_ctrl(pt3, false);
	}
	mutex_unlock(&pt3->lock);
	return 0;
}

/* register values used in pt3_fe_init() */

static const struct reg_val init0_sat[] = {
	{ 0x03, 0x01 },
	{ 0x1e, 0x10 },
};
static const struct reg_val init0_ter[] = {
	{ 0x01, 0x40 },
	{ 0x1c, 0x10 },
};
static const struct reg_val cfg_sat[] = {
	{ 0x1c, 0x15 },
	{ 0x1f, 0x04 },
};
static const struct reg_val cfg_ter[] = {
	{ 0x1d, 0x01 },
};

/*
 * pt3_fe_init: initialize demod sub modules and ISDB-T tuners all at once.
 *
 * As for demod IC (TC90522) and ISDB-T tuners (MxL301RF),
 * the i2c sequences for init'ing them are not public and hidden in a ROM,
 * and include the board specific configurations as well.
 * They are stored in a lump and cannot be taken out / accessed separately,
 * thus cannot be moved to the FE/tuner driver.
 */
static int pt3_fe_init(struct pt3_board *pt3)
{
	int i, ret;
	struct dvb_frontend *fe;

	pt3_i2c_reset(pt3);
	ret = pt3_init_all_demods(pt3);
	if (ret < 0) {
		dev_warn(&pt3->pdev->dev, "Failed to init demod chips\n");
		return ret;
	}

	/* additional config? */
	for (i = 0; i < PT3_NUM_FE; i++) {
		fe = pt3->adaps[i]->fe;

		if (fe->ops.delsys[0] == SYS_ISDBS)
			ret = pt3_demod_write(pt3->adaps[i],
					      init0_sat, ARRAY_SIZE(init0_sat));
		else
			ret = pt3_demod_write(pt3->adaps[i],
					      init0_ter, ARRAY_SIZE(init0_ter));
		if (ret < 0) {
			dev_warn(&pt3->pdev->dev,
				 "demod[%d] failed in init sequence0\n", i);
			return ret;
		}
		ret = fe->ops.init(fe);
		if (ret < 0)
			return ret;
	}

	usleep_range(2000, 4000);
	ret = pt3_set_tuner_power(pt3, true, false);
	if (ret < 0) {
		dev_warn(&pt3->pdev->dev, "Failed to control tuner module\n");
		return ret;
	}

	/* output pin configuration */
	for (i = 0; i < PT3_NUM_FE; i++) {
		fe = pt3->adaps[i]->fe;
		if (fe->ops.delsys[0] == SYS_ISDBS)
			ret = pt3_demod_write(pt3->adaps[i],
						cfg_sat, ARRAY_SIZE(cfg_sat));
		else
			ret = pt3_demod_write(pt3->adaps[i],
						cfg_ter, ARRAY_SIZE(cfg_ter));
		if (ret < 0) {
			dev_warn(&pt3->pdev->dev,
				 "demod[%d] failed in init sequence1\n", i);
			return ret;
		}
	}
	usleep_range(4000, 6000);

	for (i = 0; i < PT3_NUM_FE; i++) {
		fe = pt3->adaps[i]->fe;
		if (fe->ops.delsys[0] != SYS_ISDBS)
			continue;
		/* init and wake-up ISDB-S tuners */
		ret = fe->ops.tuner_ops.init(fe);
		if (ret < 0) {
			dev_warn(&pt3->pdev->dev,
				 "Failed to init SAT-tuner[%d]\n", i);
			return ret;
		}
	}
	ret = pt3_init_all_mxl301rf(pt3);
	if (ret < 0) {
		dev_warn(&pt3->pdev->dev, "Failed to init TERR-tuners\n");
		return ret;
	}

	ret = pt3_set_tuner_power(pt3, true, true);
	if (ret < 0) {
		dev_warn(&pt3->pdev->dev, "Failed to control tuner module\n");
		return ret;
	}

	/* Wake up all tuners and make an initial tuning,
	 * in order to avoid interference among the tuners in the module,
	 * according to the doc from the manufacturer.
	 */
	for (i = 0; i < PT3_NUM_FE; i++) {
		fe = pt3->adaps[i]->fe;
		ret = 0;
		if (fe->ops.delsys[0] == SYS_ISDBT)
			ret = fe->ops.tuner_ops.init(fe);
		/* set only when called from pt3_probe(), not resume() */
		if (ret == 0 && fe->dtv_property_cache.frequency == 0) {
			fe->dtv_property_cache.frequency =
						adap_conf[i].init_freq;
			ret = fe->ops.tuner_ops.set_params(fe);
		}
		if (ret < 0) {
			dev_warn(&pt3->pdev->dev,
				 "Failed in initial tuning of tuner[%d]\n", i);
			return ret;
		}
	}

	/* and sleep again, waiting to be opened by users. */
	for (i = 0; i < PT3_NUM_FE; i++) {
		fe = pt3->adaps[i]->fe;
		if (fe->ops.tuner_ops.sleep)
			ret = fe->ops.tuner_ops.sleep(fe);
		if (ret < 0)
			break;
		if (fe->ops.sleep)
			ret = fe->ops.sleep(fe);
		if (ret < 0)
			break;
		if (fe->ops.delsys[0] == SYS_ISDBS)
			fe->ops.set_voltage = &pt3_set_voltage;
		else
			fe->ops.set_lna = &pt3_set_lna;
	}
	if (i < PT3_NUM_FE) {
		dev_warn(&pt3->pdev->dev, "FE[%d] failed to standby\n", i);
		return ret;
	}
	return 0;
}


static int pt3_attach_fe(struct pt3_board *pt3, int i)
{
	struct i2c_board_info info;
	struct tc90522_config cfg;
	struct i2c_client *cl;
	struct dvb_adapter *dvb_adap;
	int ret;

	info = adap_conf[i].demod_info;
	cfg = adap_conf[i].demod_cfg;
	cfg.tuner_i2c = NULL;
	info.platform_data = &cfg;

	ret = -ENODEV;
	request_module("tc90522");
	cl = i2c_new_device(&pt3->i2c_adap, &info);
	if (!cl || !cl->dev.driver)
		return -ENODEV;
	pt3->adaps[i]->i2c_demod = cl;
	if (!try_module_get(cl->dev.driver->owner))
		goto err_demod_i2c_unregister_device;

	if (!strncmp(cl->name, TC90522_I2C_DEV_SAT,
		     strlen(TC90522_I2C_DEV_SAT))) {
		struct qm1d1c0042_config tcfg;

		tcfg = adap_conf[i].tuner_cfg.qm1d1c0042;
		tcfg.fe = cfg.fe;
		info = adap_conf[i].tuner_info;
		info.platform_data = &tcfg;
		request_module("qm1d1c0042");
		cl = i2c_new_device(cfg.tuner_i2c, &info);
	} else {
		struct mxl301rf_config tcfg;

		tcfg = adap_conf[i].tuner_cfg.mxl301rf;
		tcfg.fe = cfg.fe;
		info = adap_conf[i].tuner_info;
		info.platform_data = &tcfg;
		request_module("mxl301rf");
		cl = i2c_new_device(cfg.tuner_i2c, &info);
	}
	if (!cl || !cl->dev.driver)
		goto err_demod_module_put;
	pt3->adaps[i]->i2c_tuner = cl;
	if (!try_module_get(cl->dev.driver->owner))
		goto err_tuner_i2c_unregister_device;

	dvb_adap = &pt3->adaps[one_adapter ? 0 : i]->dvb_adap;
	ret = dvb_register_frontend(dvb_adap, cfg.fe);
	if (ret < 0)
		goto err_tuner_module_put;
	pt3->adaps[i]->fe = cfg.fe;
	return 0;

err_tuner_module_put:
	module_put(pt3->adaps[i]->i2c_tuner->dev.driver->owner);
err_tuner_i2c_unregister_device:
	i2c_unregister_device(pt3->adaps[i]->i2c_tuner);
err_demod_module_put:
	module_put(pt3->adaps[i]->i2c_demod->dev.driver->owner);
err_demod_i2c_unregister_device:
	i2c_unregister_device(pt3->adaps[i]->i2c_demod);

	return ret;
}


static int pt3_fetch_thread(void *data)
{
	struct pt3_adapter *adap = data;
	ktime_t delay;
	bool was_frozen;

#define PT3_INITIAL_BUF_DROPS 4
#define PT3_FETCH_DELAY 10
#define PT3_FETCH_DELAY_DELTA 2

	pt3_init_dmabuf(adap);
	adap->num_discard = PT3_INITIAL_BUF_DROPS;

	dev_dbg(adap->dvb_adap.device, "PT3: [%s] started\n",
		adap->thread->comm);
	set_freezable();
	while (!kthread_freezable_should_stop(&was_frozen)) {
		if (was_frozen)
			adap->num_discard = PT3_INITIAL_BUF_DROPS;

		pt3_proc_dma(adap);

		delay = PT3_FETCH_DELAY * NSEC_PER_MSEC;
		set_current_state(TASK_UNINTERRUPTIBLE);
		freezable_schedule_hrtimeout_range(&delay,
					PT3_FETCH_DELAY_DELTA * NSEC_PER_MSEC,
					HRTIMER_MODE_REL);
	}
	dev_dbg(adap->dvb_adap.device, "PT3: [%s] exited\n",
		adap->thread->comm);
	return 0;
}

static int pt3_start_streaming(struct pt3_adapter *adap)
{
	struct task_struct *thread;

	/* start fetching thread */
	thread = kthread_run(pt3_fetch_thread, adap, "pt3-ad%i-dmx%i",
				adap->dvb_adap.num, adap->dmxdev.dvbdev->id);
	if (IS_ERR(thread)) {
		int ret = PTR_ERR(thread);

		adap->thread = NULL;
		dev_warn(adap->dvb_adap.device,
			 "PT3 (adap:%d, dmx:%d): failed to start kthread\n",
			 adap->dvb_adap.num, adap->dmxdev.dvbdev->id);
		return ret;
	}
	adap->thread = thread;

	return pt3_start_dma(adap);
}

static int pt3_stop_streaming(struct pt3_adapter *adap)
{
	int ret;

	ret = pt3_stop_dma(adap);
	if (ret)
		dev_warn(adap->dvb_adap.device,
			 "PT3: failed to stop streaming of adap:%d/FE:%d\n",
			 adap->dvb_adap.num, adap->fe->id);

	/* kill the fetching thread */
	ret = kthread_stop(adap->thread);
	adap->thread = NULL;
	return ret;
}

static int pt3_start_feed(struct dvb_demux_feed *feed)
{
	struct pt3_adapter *adap;

	if (signal_pending(current))
		return -EINTR;

	adap = container_of(feed->demux, struct pt3_adapter, demux);
	adap->num_feeds++;
	if (adap->num_feeds > 1)
		return 0;

	return pt3_start_streaming(adap);

}

static int pt3_stop_feed(struct dvb_demux_feed *feed)
{
	struct pt3_adapter *adap;

	adap = container_of(feed->demux, struct pt3_adapter, demux);

	adap->num_feeds--;
	if (adap->num_feeds > 0 || !adap->thread)
		return 0;
	adap->num_feeds = 0;

	return pt3_stop_streaming(adap);
}


static int pt3_alloc_adapter(struct pt3_board *pt3, int index)
{
	int ret;
	struct pt3_adapter *adap;
	struct dvb_adapter *da;

	adap = kzalloc(sizeof(*adap), GFP_KERNEL);
	if (!adap)
		return -ENOMEM;

	pt3->adaps[index] = adap;
	adap->adap_idx = index;

	if (index == 0 || !one_adapter) {
		ret = dvb_register_adapter(&adap->dvb_adap, "PT3 DVB",
				THIS_MODULE, &pt3->pdev->dev, adapter_nr);
		if (ret < 0) {
			dev_err(&pt3->pdev->dev,
				"failed to register adapter dev\n");
			goto err_mem;
		}
		da = &adap->dvb_adap;
	} else
		da = &pt3->adaps[0]->dvb_adap;

	adap->dvb_adap.priv = pt3;
	adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
	adap->demux.priv = adap;
	adap->demux.feednum = 256;
	adap->demux.filternum = 256;
	adap->demux.start_feed = pt3_start_feed;
	adap->demux.stop_feed = pt3_stop_feed;
	ret = dvb_dmx_init(&adap->demux);
	if (ret < 0) {
		dev_err(&pt3->pdev->dev, "failed to init dmx dev\n");
		goto err_adap;
	}

	adap->dmxdev.filternum = 256;
	adap->dmxdev.demux = &adap->demux.dmx;
	ret = dvb_dmxdev_init(&adap->dmxdev, da);
	if (ret < 0) {
		dev_err(&pt3->pdev->dev, "failed to init dmxdev\n");
		goto err_demux;
	}

	ret = pt3_alloc_dmabuf(adap);
	if (ret) {
		dev_err(&pt3->pdev->dev, "failed to alloc DMA buffers\n");
		goto err_dmabuf;
	}

	return 0;

err_dmabuf:
	pt3_free_dmabuf(adap);
	dvb_dmxdev_release(&adap->dmxdev);
err_demux:
	dvb_dmx_release(&adap->demux);
err_adap:
	if (index == 0 || !one_adapter)
		dvb_unregister_adapter(da);
err_mem:
	kfree(adap);
	pt3->adaps[index] = NULL;
	return ret;
}

static void pt3_cleanup_adapter(struct pt3_board *pt3, int index)
{
	struct pt3_adapter *adap;
	struct dmx_demux *dmx;

	adap = pt3->adaps[index];
	if (adap == NULL)
		return;

	/* stop demux kthread */
	if (adap->thread)
		pt3_stop_streaming(adap);

	dmx = &adap->demux.dmx;
	dmx->close(dmx);
	if (adap->fe) {
		adap->fe->callback = NULL;
		if (adap->fe->frontend_priv)
			dvb_unregister_frontend(adap->fe);
		if (adap->i2c_tuner) {
			module_put(adap->i2c_tuner->dev.driver->owner);
			i2c_unregister_device(adap->i2c_tuner);
		}
		if (adap->i2c_demod) {
			module_put(adap->i2c_demod->dev.driver->owner);
			i2c_unregister_device(adap->i2c_demod);
		}
	}
	pt3_free_dmabuf(adap);
	dvb_dmxdev_release(&adap->dmxdev);
	dvb_dmx_release(&adap->demux);
	if (index == 0 || !one_adapter)
		dvb_unregister_adapter(&adap->dvb_adap);
	kfree(adap);
	pt3->adaps[index] = NULL;
}

#ifdef CONFIG_PM_SLEEP

static int pt3_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct pt3_board *pt3 = pci_get_drvdata(pdev);
	int i;
	struct pt3_adapter *adap;

	for (i = 0; i < PT3_NUM_FE; i++) {
		adap = pt3->adaps[i];
		if (adap->num_feeds > 0)
			pt3_stop_dma(adap);
		dvb_frontend_suspend(adap->fe);
		pt3_free_dmabuf(adap);
	}

	pt3_lnb_ctrl(pt3, false);
	pt3_set_tuner_power(pt3, false, false);
	return 0;
}

static int pt3_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct pt3_board *pt3 = pci_get_drvdata(pdev);
	int i, ret;
	struct pt3_adapter *adap;

	ret = pt3_fe_init(pt3);
	if (ret)
		return ret;

	if (pt3->lna_on_cnt > 0)
		pt3_set_tuner_power(pt3, true, true);
	if (pt3->lnb_on_cnt > 0)
		pt3_lnb_ctrl(pt3, true);

	for (i = 0; i < PT3_NUM_FE; i++) {
		adap = pt3->adaps[i];
		dvb_frontend_resume(adap->fe);
		ret = pt3_alloc_dmabuf(adap);
		if (ret) {
			dev_err(&pt3->pdev->dev, "failed to alloc DMA bufs\n");
			continue;
		}
		if (adap->num_feeds > 0)
			pt3_start_dma(adap);
	}

	return 0;
}

#endif /* CONFIG_PM_SLEEP */


static void pt3_remove(struct pci_dev *pdev)
{
	struct pt3_board *pt3;
	int i;

	pt3 = pci_get_drvdata(pdev);
	for (i = PT3_NUM_FE - 1; i >= 0; i--)
		pt3_cleanup_adapter(pt3, i);
	i2c_del_adapter(&pt3->i2c_adap);
	kfree(pt3->i2c_buf);
	pci_iounmap(pt3->pdev, pt3->regs[0]);
	pci_iounmap(pt3->pdev, pt3->regs[1]);
	pci_release_regions(pdev);
	pci_disable_device(pdev);
	kfree(pt3);
}

static int pt3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	u8 rev;
	u32 ver;
	int i, ret;
	struct pt3_board *pt3;
	struct i2c_adapter *i2c;

	if (pci_read_config_byte(pdev, PCI_REVISION_ID, &rev) || rev != 1)
		return -ENODEV;

	ret = pci_enable_device(pdev);
	if (ret < 0)
		return -ENODEV;
	pci_set_master(pdev);

	ret = pci_request_regions(pdev, DRV_NAME);
	if (ret < 0)
		goto err_disable_device;

	ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
	if (ret == 0)
		dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
	else {
		ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
		if (ret == 0)
			dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
		else {
			dev_err(&pdev->dev, "Failed to set DMA mask\n");
			goto err_release_regions;
		}
		dev_info(&pdev->dev, "Use 32bit DMA\n");
	}

	pt3 = kzalloc(sizeof(*pt3), GFP_KERNEL);
	if (!pt3) {
		ret = -ENOMEM;
		goto err_release_regions;
	}
	pci_set_drvdata(pdev, pt3);
	pt3->pdev = pdev;
	mutex_init(&pt3->lock);
	pt3->regs[0] = pci_ioremap_bar(pdev, 0);
	pt3->regs[1] = pci_ioremap_bar(pdev, 2);
	if (pt3->regs[0] == NULL || pt3->regs[1] == NULL) {
		dev_err(&pdev->dev, "Failed to ioremap\n");
		ret = -ENOMEM;
		goto err_kfree;
	}

	ver = ioread32(pt3->regs[0] + REG_VERSION);
	if ((ver >> 16) != 0x0301) {
		dev_warn(&pdev->dev, "PT%d, I/F-ver.:%d not supported\n",
			 ver >> 24, (ver & 0x00ff0000) >> 16);
		ret = -ENODEV;
		goto err_iounmap;
	}

	pt3->num_bufs = clamp_val(num_bufs, MIN_DATA_BUFS, MAX_DATA_BUFS);

	pt3->i2c_buf = kmalloc(sizeof(*pt3->i2c_buf), GFP_KERNEL);
	if (pt3->i2c_buf == NULL) {
		ret = -ENOMEM;
		goto err_iounmap;
	}
	i2c = &pt3->i2c_adap;
	i2c->owner = THIS_MODULE;
	i2c->algo = &pt3_i2c_algo;
	i2c->algo_data = NULL;
	i2c->dev.parent = &pdev->dev;
	strlcpy(i2c->name, DRV_NAME, sizeof(i2c->name));
	i2c_set_adapdata(i2c, pt3);
	ret = i2c_add_adapter(i2c);
	if (ret < 0)
		goto err_i2cbuf;

	for (i = 0; i < PT3_NUM_FE; i++) {
		ret = pt3_alloc_adapter(pt3, i);
		if (ret < 0)
			break;

		ret = pt3_attach_fe(pt3, i);
		if (ret < 0)
			break;
	}
	if (i < PT3_NUM_FE) {
		dev_err(&pdev->dev, "Failed to create FE%d\n", i);
		goto err_cleanup_adapters;
	}

	ret = pt3_fe_init(pt3);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to init frontends\n");
		i = PT3_NUM_FE - 1;
		goto err_cleanup_adapters;
	}

	dev_info(&pdev->dev,
		 "successfully init'ed PT%d (fw:0x%02x, I/F:0x%02x)\n",
		 ver >> 24, (ver >> 8) & 0xff, (ver >> 16) & 0xff);
	return 0;

err_cleanup_adapters:
	while (i >= 0)
		pt3_cleanup_adapter(pt3, i--);
	i2c_del_adapter(i2c);
err_i2cbuf:
	kfree(pt3->i2c_buf);
err_iounmap:
	if (pt3->regs[0])
		pci_iounmap(pdev, pt3->regs[0]);
	if (pt3->regs[1])
		pci_iounmap(pdev, pt3->regs[1]);
err_kfree:
	kfree(pt3);
err_release_regions:
	pci_release_regions(pdev);
err_disable_device:
	pci_disable_device(pdev);
	return ret;

}

static const struct pci_device_id pt3_id_table[] = {
	{ PCI_DEVICE_SUB(0x1172, 0x4c15, 0xee8d, 0x0368) },
	{ },
};
MODULE_DEVICE_TABLE(pci, pt3_id_table);

static SIMPLE_DEV_PM_OPS(pt3_pm_ops, pt3_suspend, pt3_resume);

static struct pci_driver pt3_driver = {
	.name		= DRV_NAME,
	.probe		= pt3_probe,
	.remove		= pt3_remove,
	.id_table	= pt3_id_table,

	.driver.pm	= &pt3_pm_ops,
};

module_pci_driver(pt3_driver);

MODULE_DESCRIPTION("Earthsoft PT3 Driver");
MODULE_AUTHOR("Akihiro TSUKADA");
MODULE_LICENSE("GPL");