summaryrefslogtreecommitdiff
path: root/drivers/media/dvb/dvb-usb/dib0700_core.c
blob: 156cbfc9c79db710de6b9b119c55eaf823476f09 (plain)
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
/* Linux driver for devices based on the DiBcom DiB0700 USB bridge
 *
 *	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.
 *
 *  Copyright (C) 2005-6 DiBcom, SA
 */
#include "dib0700.h"

/* debug */
int dvb_usb_dib0700_debug;
module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);

static int nb_packet_buffer_size = 21;
module_param(nb_packet_buffer_size, int, 0644);
MODULE_PARM_DESC(nb_packet_buffer_size,
	"Set the dib0700 driver data buffer size. This parameter "
	"corresponds to the number of TS packets. The actual size of "
	"the data buffer corresponds to this parameter "
	"multiplied by 188 (default: 21)");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);


int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
			u32 *romversion, u32 *ramversion, u32 *fwtype)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
				  REQUEST_GET_VERSION,
				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
				  st->buf, 16, USB_CTRL_GET_TIMEOUT);
	if (hwversion != NULL)
		*hwversion  = (st->buf[0] << 24)  | (st->buf[1] << 16)  |
			(st->buf[2] << 8)  | st->buf[3];
	if (romversion != NULL)
		*romversion = (st->buf[4] << 24)  | (st->buf[5] << 16)  |
			(st->buf[6] << 8)  | st->buf[7];
	if (ramversion != NULL)
		*ramversion = (st->buf[8] << 24)  | (st->buf[9] << 16)  |
			(st->buf[10] << 8) | st->buf[11];
	if (fwtype != NULL)
		*fwtype     = (st->buf[12] << 24) | (st->buf[13] << 16) |
			(st->buf[14] << 8) | st->buf[15];
	mutex_unlock(&d->usb_mutex);
	return ret;
}

/* expecting rx buffer: request data[0] data[1] ... data[2] */
static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
{
	int status;

	deb_data(">>> ");
	debug_dump(tx, txlen, deb_data);

	status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
		tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
		USB_CTRL_GET_TIMEOUT);

	if (status != txlen)
		deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);

	return status < 0 ? status : 0;
}

/* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
{
	u16 index, value;
	int status;

	if (txlen < 2) {
		err("tx buffer length is smaller than 2. Makes no sense.");
		return -EINVAL;
	}
	if (txlen > 4) {
		err("tx buffer length is larger than 4. Not supported.");
		return -EINVAL;
	}

	deb_data(">>> ");
	debug_dump(tx,txlen,deb_data);

	value = ((txlen - 2) << 8) | tx[1];
	index = 0;
	if (txlen > 2)
		index |= (tx[2] << 8);
	if (txlen > 3)
		index |= tx[3];

	status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
			USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
			USB_CTRL_GET_TIMEOUT);

	if (status < 0)
		deb_info("ep 0 read error (status = %d)\n",status);

	deb_data("<<< ");
	debug_dump(rx, rxlen, deb_data);

	return status; /* length in case of success */
}

int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	st->buf[0] = REQUEST_SET_GPIO;
	st->buf[1] = gpio;
	st->buf[2] = ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6);

	ret = dib0700_ctrl_wr(d, st->buf, 3);

	mutex_unlock(&d->usb_mutex);
	return ret;
}

static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (st->fw_version >= 0x10201) {
		if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
			err("could not acquire lock");
			return 0;
		}

		st->buf[0] = REQUEST_SET_USB_XFER_LEN;
		st->buf[1] = (nb_ts_packets >> 8) & 0xff;
		st->buf[2] = nb_ts_packets & 0xff;

		deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);

		ret = dib0700_ctrl_wr(d, st->buf, 3);
		mutex_unlock(&d->usb_mutex);
	} else {
		deb_info("this firmware does not allow to change the USB xfer len\n");
		ret = -EIO;
	}

	return ret;
}

/*
 * I2C master xfer function (supported in 1.20 firmware)
 */
static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
				int num)
{
	/* The new i2c firmware messages are more reliable and in particular
	   properly support i2c read calls not preceded by a write */

	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct dib0700_state *st = d->priv;
	uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
	uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
	uint8_t en_start = 0;
	uint8_t en_stop = 0;
	int result, i;

	/* Ensure nobody else hits the i2c bus while we're sending our
	   sequence of messages, (such as the remote control thread) */
	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;

	for (i = 0; i < num; i++) {
		if (i == 0) {
			/* First message in the transaction */
			en_start = 1;
		} else if (!(msg[i].flags & I2C_M_NOSTART)) {
			/* Device supports repeated-start */
			en_start = 1;
		} else {
			/* Not the first packet and device doesn't support
			   repeated start */
			en_start = 0;
		}
		if (i == (num - 1)) {
			/* Last message in the transaction */
			en_stop = 1;
		}

		if (msg[i].flags & I2C_M_RD) {
			/* Read request */
			u16 index, value;
			uint8_t i2c_dest;

			i2c_dest = (msg[i].addr << 1);
			value = ((en_start << 7) | (en_stop << 6) |
				 (msg[i].len & 0x3F)) << 8 | i2c_dest;
			/* I2C ctrl + FE bus; */
			index = ((gen_mode << 6) & 0xC0) |
				((bus_mode << 4) & 0x30);

			result = usb_control_msg(d->udev,
						 usb_rcvctrlpipe(d->udev, 0),
						 REQUEST_NEW_I2C_READ,
						 USB_TYPE_VENDOR | USB_DIR_IN,
						 value, index, msg[i].buf,
						 msg[i].len,
						 USB_CTRL_GET_TIMEOUT);
			if (result < 0) {
				deb_info("i2c read error (status = %d)\n", result);
				break;
			}

			deb_data("<<< ");
			debug_dump(msg[i].buf, msg[i].len, deb_data);

		} else {
			/* Write request */
			if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
				err("could not acquire lock");
				return 0;
			}
			st->buf[0] = REQUEST_NEW_I2C_WRITE;
			st->buf[1] = msg[i].addr << 1;
			st->buf[2] = (en_start << 7) | (en_stop << 6) |
				(msg[i].len & 0x3F);
			/* I2C ctrl + FE bus; */
			st->buf[3] = ((gen_mode << 6) & 0xC0) |
				 ((bus_mode << 4) & 0x30);
			/* The Actual i2c payload */
			memcpy(&st->buf[4], msg[i].buf, msg[i].len);

			deb_data(">>> ");
			debug_dump(st->buf, msg[i].len + 4, deb_data);

			result = usb_control_msg(d->udev,
						 usb_sndctrlpipe(d->udev, 0),
						 REQUEST_NEW_I2C_WRITE,
						 USB_TYPE_VENDOR | USB_DIR_OUT,
						 0, 0, st->buf, msg[i].len + 4,
						 USB_CTRL_GET_TIMEOUT);
			mutex_unlock(&d->usb_mutex);
			if (result < 0) {
				deb_info("i2c write error (status = %d)\n", result);
				break;
			}
		}
	}
	mutex_unlock(&d->i2c_mutex);
	return i;
}

/*
 * I2C master xfer function (pre-1.20 firmware)
 */
static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
				   struct i2c_msg *msg, int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct dib0700_state *st = d->priv;
	int i,len;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;
	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	for (i = 0; i < num; i++) {
		/* fill in the address */
		st->buf[1] = msg[i].addr << 1;
		/* fill the buffer */
		memcpy(&st->buf[2], msg[i].buf, msg[i].len);

		/* write/read request */
		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
			st->buf[0] = REQUEST_I2C_READ;
			st->buf[1] |= 1;

			/* special thing in the current firmware: when length is zero the read-failed */
			len = dib0700_ctrl_rd(d, st->buf, msg[i].len + 2,
					msg[i+1].buf, msg[i+1].len);
			if (len <= 0) {
				deb_info("I2C read failed on address 0x%02x\n",
						msg[i].addr);
				break;
			}

			msg[i+1].len = len;

			i++;
		} else {
			st->buf[0] = REQUEST_I2C_WRITE;
			if (dib0700_ctrl_wr(d, st->buf, msg[i].len + 2) < 0)
				break;
		}
	}
	mutex_unlock(&d->usb_mutex);
	mutex_unlock(&d->i2c_mutex);

	return i;
}

static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
			    int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	struct dib0700_state *st = d->priv;

	if (st->fw_use_new_i2c_api == 1) {
		/* User running at least fw 1.20 */
		return dib0700_i2c_xfer_new(adap, msg, num);
	} else {
		/* Use legacy calls */
		return dib0700_i2c_xfer_legacy(adap, msg, num);
	}
}

static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

struct i2c_algorithm dib0700_i2c_algo = {
	.master_xfer   = dib0700_i2c_xfer,
	.functionality = dib0700_i2c_func,
};

int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
			struct dvb_usb_device_description **desc, int *cold)
{
	s16 ret;
	u8 *b;

	b = kmalloc(16, GFP_KERNEL);
	if (!b)
		return	-ENOMEM;


	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
		REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);

	deb_info("FW GET_VERSION length: %d\n",ret);

	*cold = ret <= 0;
	deb_info("cold: %d\n", *cold);

	kfree(b);
	return 0;
}

static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
	u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
	u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
{
	struct dib0700_state *st = d->priv;
	int ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	st->buf[0] = REQUEST_SET_CLOCK;
	st->buf[1] = (en_pll << 7) | (pll_src << 6) |
		(pll_range << 5) | (clock_gpio3 << 4);
	st->buf[2] = (pll_prediv >> 8)  & 0xff; /* MSB */
	st->buf[3] =  pll_prediv        & 0xff; /* LSB */
	st->buf[4] = (pll_loopdiv >> 8) & 0xff; /* MSB */
	st->buf[5] =  pll_loopdiv       & 0xff; /* LSB */
	st->buf[6] = (free_div >> 8)    & 0xff; /* MSB */
	st->buf[7] =  free_div          & 0xff; /* LSB */
	st->buf[8] = (dsuScaler >> 8)   & 0xff; /* MSB */
	st->buf[9] =  dsuScaler         & 0xff; /* LSB */

	ret = dib0700_ctrl_wr(d, st->buf, 10);
	mutex_unlock(&d->usb_mutex);

	return ret;
}

int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
{
	struct dib0700_state *st = d->priv;
	u16 divider;
	int ret;

	if (scl_kHz == 0)
		return -EINVAL;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	st->buf[0] = REQUEST_SET_I2C_PARAM;
	divider = (u16) (30000 / scl_kHz);
	st->buf[1] = 0;
	st->buf[2] = (u8) (divider >> 8);
	st->buf[3] = (u8) (divider & 0xff);
	divider = (u16) (72000 / scl_kHz);
	st->buf[4] = (u8) (divider >> 8);
	st->buf[5] = (u8) (divider & 0xff);
	divider = (u16) (72000 / scl_kHz); /* clock: 72MHz */
	st->buf[6] = (u8) (divider >> 8);
	st->buf[7] = (u8) (divider & 0xff);

	deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
		(st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
		st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);

	ret = dib0700_ctrl_wr(d, st->buf, 8);
	mutex_unlock(&d->usb_mutex);

	return ret;
}


int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
{
	switch (clk_MHz) {
		case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
		default: return -EINVAL;
	}
	return 0;
}

static int dib0700_jumpram(struct usb_device *udev, u32 address)
{
	int ret = 0, actlen;
	u8 *buf;

	buf = kmalloc(8, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	buf[0] = REQUEST_JUMPRAM;
	buf[1] = 0;
	buf[2] = 0;
	buf[3] = 0;
	buf[4] = (address >> 24) & 0xff;
	buf[5] = (address >> 16) & 0xff;
	buf[6] = (address >> 8)  & 0xff;
	buf[7] =  address        & 0xff;

	if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
		deb_fw("jumpram to 0x%x failed\n",address);
		goto out;
	}
	if (actlen != 8) {
		deb_fw("jumpram to 0x%x failed\n",address);
		ret = -EIO;
		goto out;
	}
out:
	kfree(buf);
	return ret;
}

int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
{
	struct hexline hx;
	int pos = 0, ret, act_len, i, adap_num;
	u8 *buf;
	u32 fw_version;

	buf = kmalloc(260, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
		deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",
				hx.addr, hx.len, hx.chk);

		buf[0] = hx.len;
		buf[1] = (hx.addr >> 8) & 0xff;
		buf[2] =  hx.addr       & 0xff;
		buf[3] = hx.type;
		memcpy(&buf[4],hx.data,hx.len);
		buf[4+hx.len] = hx.chk;

		ret = usb_bulk_msg(udev,
			usb_sndbulkpipe(udev, 0x01),
			buf,
			hx.len + 5,
			&act_len,
			1000);

		if (ret < 0) {
			err("firmware download failed at %d with %d",pos,ret);
			goto out;
		}
	}

	if (ret == 0) {
		/* start the firmware */
		if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
			info("firmware started successfully.");
			msleep(500);
		}
	} else
		ret = -EIO;

	/* the number of ts packet has to be at least 1 */
	if (nb_packet_buffer_size < 1)
		nb_packet_buffer_size = 1;

	/* get the fimware version */
	usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
				  REQUEST_GET_VERSION,
				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
				  buf, 16, USB_CTRL_GET_TIMEOUT);
	fw_version = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];

	/* set the buffer size - DVB-USB is allocating URB buffers
	 * only after the firwmare download was successful */
	for (i = 0; i < dib0700_device_count; i++) {
		for (adap_num = 0; adap_num < dib0700_devices[i].num_adapters;
				adap_num++) {
			if (fw_version >= 0x10201) {
				dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 188*nb_packet_buffer_size;
			} else {
				/* for fw version older than 1.20.1,
				 * the buffersize has to be n times 512 */
				dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = ((188*nb_packet_buffer_size+188/2)/512)*512;
				if (dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize < 512)
					dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 512;
			}
		}
	}
out:
	kfree(buf);
	return ret;
}

int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	struct dib0700_state *st = adap->dev->priv;
	int ret;

	if ((onoff != 0) && (st->fw_version >= 0x10201)) {
		/* for firmware later than 1.20.1,
		 * the USB xfer length can be set  */
		ret = dib0700_set_usb_xfer_len(adap->dev,
			st->nb_packet_buffer_size);
		if (ret < 0) {
			deb_info("can not set the USB xfer len\n");
			return ret;
		}
	}

	if (mutex_lock_interruptible(&adap->dev->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	st->buf[0] = REQUEST_ENABLE_VIDEO;
	/* this bit gives a kind of command,
	 * rather than enabling something or not */
	st->buf[1] = (onoff << 4) | 0x00;

	if (st->disable_streaming_master_mode == 1)
		st->buf[2] = 0x00;
	else
		st->buf[2] = 0x01 << 4; /* Master mode */

	st->buf[3] = 0x00;

	deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);

	st->channel_state &= ~0x3;
	if ((adap->fe_adap[0].stream.props.endpoint != 2)
			&& (adap->fe_adap[0].stream.props.endpoint != 3)) {
		deb_info("the endpoint number (%i) is not correct, use the adapter id instead", adap->fe_adap[0].stream.props.endpoint);
		if (onoff)
			st->channel_state |=	1 << (adap->id);
		else
			st->channel_state |=	1 << ~(adap->id);
	} else {
		if (onoff)
			st->channel_state |=	1 << (adap->fe_adap[0].stream.props.endpoint-2);
		else
			st->channel_state |=	1 << (3-adap->fe_adap[0].stream.props.endpoint);
	}

	st->buf[2] |= st->channel_state;

	deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);

	ret = dib0700_ctrl_wr(adap->dev, st->buf, 4);
	mutex_unlock(&adap->dev->usb_mutex);

	return ret;
}

int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
{
	struct dvb_usb_device *d = rc->priv;
	struct dib0700_state *st = d->priv;
	int new_proto, ret;

	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
		err("could not acquire lock");
		return 0;
	}

	st->buf[0] = REQUEST_SET_RC;
	st->buf[1] = 0;
	st->buf[2] = 0;

	/* Set the IR mode */
	if (rc_type == RC_TYPE_RC5)
		new_proto = 1;
	else if (rc_type == RC_TYPE_NEC)
		new_proto = 0;
	else if (rc_type == RC_TYPE_RC6) {
		if (st->fw_version < 0x10200) {
			ret = -EINVAL;
			goto out;
		}

		new_proto = 2;
	} else {
		ret = -EINVAL;
		goto out;
	}

	st->buf[1] = new_proto;

	ret = dib0700_ctrl_wr(d, st->buf, 3);
	if (ret < 0) {
		err("ir protocol setup failed");
		goto out;
	}

	d->props.rc.core.protocol = rc_type;

out:
	mutex_unlock(&d->usb_mutex);
	return ret;
}

/* Number of keypresses to ignore before start repeating */
#define RC_REPEAT_DELAY_V1_20 10

/* This is the structure of the RC response packet starting in firmware 1.20 */
struct dib0700_rc_response {
	u8 report_id;
	u8 data_state;
	union {
		u16 system16;
		struct {
			u8 not_system;
			u8 system;
		};
	};
	u8 data;
	u8 not_data;
};
#define RC_MSG_SIZE_V1_20 6

static void dib0700_rc_urb_completion(struct urb *purb)
{
	struct dvb_usb_device *d = purb->context;
	struct dib0700_rc_response *poll_reply;
	u32 uninitialized_var(keycode);
	u8 toggle;

	deb_info("%s()\n", __func__);
	if (d == NULL)
		return;

	if (d->rc_dev == NULL) {
		/* This will occur if disable_rc_polling=1 */
		usb_free_urb(purb);
		return;
	}

	poll_reply = purb->transfer_buffer;

	if (purb->status < 0) {
		deb_info("discontinuing polling\n");
		usb_free_urb(purb);
		return;
	}

	if (purb->actual_length != RC_MSG_SIZE_V1_20) {
		deb_info("malformed rc msg size=%d\n", purb->actual_length);
		goto resubmit;
	}

	deb_data("IR ID = %02X state = %02X System = %02X %02X Cmd = %02X %02X (len %d)\n",
		 poll_reply->report_id, poll_reply->data_state,
		 poll_reply->system, poll_reply->not_system,
		 poll_reply->data, poll_reply->not_data,
		 purb->actual_length);

	switch (d->props.rc.core.protocol) {
	case RC_TYPE_NEC:
		toggle = 0;

		/* NEC protocol sends repeat code as 0 0 0 FF */
		if ((poll_reply->system == 0x00) && (poll_reply->data == 0x00)
		    && (poll_reply->not_data == 0xff)) {
			poll_reply->data_state = 2;
			break;
		}

		if ((poll_reply->system ^ poll_reply->not_system) != 0xff) {
			deb_data("NEC extended protocol\n");
			/* NEC extended code - 24 bits */
			keycode = be16_to_cpu(poll_reply->system16) << 8 | poll_reply->data;
		} else {
			deb_data("NEC normal protocol\n");
			/* normal NEC code - 16 bits */
			keycode = poll_reply->system << 8 | poll_reply->data;
		}

		break;
	default:
		deb_data("RC5 protocol\n");
		/* RC5 Protocol */
		toggle = poll_reply->report_id;
		keycode = poll_reply->system << 8 | poll_reply->data;

		break;
	}

	if ((poll_reply->data + poll_reply->not_data) != 0xff) {
		/* Key failed integrity check */
		err("key failed integrity check: %04x %02x %02x",
		    poll_reply->system,
		    poll_reply->data, poll_reply->not_data);
		goto resubmit;
	}

	rc_keydown(d->rc_dev, keycode, toggle);

resubmit:
	/* Clean the buffer before we requeue */
	memset(purb->transfer_buffer, 0, RC_MSG_SIZE_V1_20);

	/* Requeue URB */
	usb_submit_urb(purb, GFP_ATOMIC);
}

int dib0700_rc_setup(struct dvb_usb_device *d)
{
	struct dib0700_state *st = d->priv;
	struct urb *purb;
	int ret;

	/* Poll-based. Don't initialize bulk mode */
	if (st->fw_version < 0x10200)
		return 0;

	/* Starting in firmware 1.20, the RC info is provided on a bulk pipe */
	purb = usb_alloc_urb(0, GFP_KERNEL);
	if (purb == NULL) {
		err("rc usb alloc urb failed\n");
		return -ENOMEM;
	}

	purb->transfer_buffer = kzalloc(RC_MSG_SIZE_V1_20, GFP_KERNEL);
	if (purb->transfer_buffer == NULL) {
		err("rc kzalloc failed\n");
		usb_free_urb(purb);
		return -ENOMEM;
	}

	purb->status = -EINPROGRESS;
	usb_fill_bulk_urb(purb, d->udev, usb_rcvbulkpipe(d->udev, 1),
			  purb->transfer_buffer, RC_MSG_SIZE_V1_20,
			  dib0700_rc_urb_completion, d);

	ret = usb_submit_urb(purb, GFP_ATOMIC);
	if (ret)
		err("rc submit urb failed\n");

	return ret;
}

static int dib0700_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
{
	int i;
	struct dvb_usb_device *dev;

	for (i = 0; i < dib0700_device_count; i++)
		if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
		    &dev, adapter_nr) == 0) {
			struct dib0700_state *st = dev->priv;
			u32 hwversion, romversion, fw_version, fwtype;

			dib0700_get_version(dev, &hwversion, &romversion,
				&fw_version, &fwtype);

			deb_info("Firmware version: %x, %d, 0x%x, %d\n",
				hwversion, romversion, fw_version, fwtype);

			st->fw_version = fw_version;
			st->nb_packet_buffer_size = (u32)nb_packet_buffer_size;

			/* Disable polling mode on newer firmwares */
			if (st->fw_version >= 0x10200)
				dev->props.rc.core.bulk_mode = true;
			else
				dev->props.rc.core.bulk_mode = false;

			dib0700_rc_setup(dev);

			return 0;
		}

	return -ENODEV;
}

static struct usb_driver dib0700_driver = {
	.name       = "dvb_usb_dib0700",
	.probe      = dib0700_probe,
	.disconnect = dvb_usb_device_exit,
	.id_table   = dib0700_usb_id_table,
};

/* module stuff */
static int __init dib0700_module_init(void)
{
	int result;
	info("loaded with support for %d different device-types", dib0700_device_count);
	if ((result = usb_register(&dib0700_driver))) {
		err("usb_register failed. Error number %d",result);
		return result;
	}

	return 0;
}

static void __exit dib0700_module_exit(void)
{
	/* deregister this driver from the USB subsystem */
	usb_deregister(&dib0700_driver);
}

module_init (dib0700_module_init);
module_exit (dib0700_module_exit);

MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");