summaryrefslogtreecommitdiffstats
path: root/drivers/usb/renesas_usbhs/pipe.c
blob: 040bcefcb0402c80116b917ea6595e1d01ed0a4d (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
/*
 * Renesas USB driver
 *
 * Copyright (C) 2011 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
#include <linux/delay.h>
#include <linux/slab.h>
#include "common.h"
#include "pipe.h"

/*
 *		macros
 */
#define usbhsp_addr_offset(p)	((usbhs_pipe_number(p) - 1) * 2)

#define usbhsp_flags_set(p, f)	((p)->flags |=  USBHS_PIPE_FLAGS_##f)
#define usbhsp_flags_clr(p, f)	((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
#define usbhsp_flags_has(p, f)	((p)->flags &   USBHS_PIPE_FLAGS_##f)
#define usbhsp_flags_init(p)	do {(p)->flags = 0; } while (0)

/*
 * for debug
 */
static char *usbhsp_pipe_name[] = {
	[USB_ENDPOINT_XFER_CONTROL]	= "DCP",
	[USB_ENDPOINT_XFER_BULK]	= "BULK",
	[USB_ENDPOINT_XFER_INT]		= "INT",
	[USB_ENDPOINT_XFER_ISOC]	= "ISO",
};

char *usbhs_pipe_name(struct usbhs_pipe *pipe)
{
	return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
}

/*
 *		DCPCTR/PIPEnCTR functions
 */
static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	int offset = usbhsp_addr_offset(pipe);

	if (usbhs_pipe_is_dcp(pipe))
		usbhs_bset(priv, DCPCTR, mask, val);
	else
		usbhs_bset(priv, PIPEnCTR + offset, mask, val);
}

static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	int offset = usbhsp_addr_offset(pipe);

	if (usbhs_pipe_is_dcp(pipe))
		return usbhs_read(priv, DCPCTR);
	else
		return usbhs_read(priv, PIPEnCTR + offset);
}

/*
 *		DCP/PIPE functions
 */
static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
				  u16 dcp_reg, u16 pipe_reg,
				  u16 mask, u16 val)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

	if (usbhs_pipe_is_dcp(pipe))
		usbhs_bset(priv, dcp_reg, mask, val);
	else
		usbhs_bset(priv, pipe_reg, mask, val);
}

/*
 *		DCPCFG/PIPECFG functions
 */
static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
{
	__usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
}

/*
 *		PIPEnTRN/PIPEnTRE functions
 */
static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	struct device *dev = usbhs_priv_to_dev(priv);
	int num = usbhs_pipe_number(pipe);
	u16 reg;

	/*
	 * It is impossible to calculate address,
	 * since PIPEnTRN addresses were mapped randomly.
	 */
#define CASE_PIPExTRN(a)		\
	case 0x ## a:			\
		reg = PIPE ## a ## TRN;	\
		break;

	switch (num) {
	CASE_PIPExTRN(1);
	CASE_PIPExTRN(2);
	CASE_PIPExTRN(3);
	CASE_PIPExTRN(4);
	CASE_PIPExTRN(5);
	CASE_PIPExTRN(B);
	CASE_PIPExTRN(C);
	CASE_PIPExTRN(D);
	CASE_PIPExTRN(E);
	CASE_PIPExTRN(F);
	CASE_PIPExTRN(9);
	CASE_PIPExTRN(A);
	default:
		dev_err(dev, "unknown pipe (%d)\n", num);
		return;
	}
	__usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
}

static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	struct device *dev = usbhs_priv_to_dev(priv);
	int num = usbhs_pipe_number(pipe);
	u16 reg;

	/*
	 * It is impossible to calculate address,
	 * since PIPEnTRE addresses were mapped randomly.
	 */
#define CASE_PIPExTRE(a)			\
	case 0x ## a:				\
		reg = PIPE ## a ## TRE;		\
		break;

	switch (num) {
	CASE_PIPExTRE(1);
	CASE_PIPExTRE(2);
	CASE_PIPExTRE(3);
	CASE_PIPExTRE(4);
	CASE_PIPExTRE(5);
	CASE_PIPExTRE(B);
	CASE_PIPExTRE(C);
	CASE_PIPExTRE(D);
	CASE_PIPExTRE(E);
	CASE_PIPExTRE(F);
	CASE_PIPExTRE(9);
	CASE_PIPExTRE(A);
	default:
		dev_err(dev, "unknown pipe (%d)\n", num);
		return;
	}

	__usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
}

/*
 *		PIPEBUF
 */
static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
{
	if (usbhs_pipe_is_dcp(pipe))
		return;

	__usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
}

/*
 *		DCPMAXP/PIPEMAXP
 */
static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
{
	__usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
}

/*
 *		pipe control functions
 */
static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

	/*
	 * On pipe, this is necessary before
	 * accesses to below registers.
	 *
	 * PIPESEL	: usbhsp_pipe_select
	 * PIPECFG	: usbhsp_pipe_cfg_xxx
	 * PIPEBUF	: usbhsp_pipe_buf_xxx
	 * PIPEMAXP	: usbhsp_pipe_maxp_xxx
	 * PIPEPERI
	 */

	/*
	 * if pipe is dcp, no pipe is selected.
	 * it is no problem, because dcp have its register
	 */
	usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
}

static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	int timeout = 1024;
	u16 val;

	/*
	 * make sure....
	 *
	 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
	 * specified by the CURPIPE bits.
	 * When changing the setting of this bit after changing
	 * the PID bits for the selected pipe from BUF to NAK,
	 * check that CSSTS = 0 and PBUSY = 0.
	 */

	/*
	 * CURPIPE bit = 0
	 *
	 * see also
	 *  "Operation"
	 *  - "Pipe Control"
	 *   - "Pipe Control Registers Switching Procedure"
	 */
	usbhs_write(priv, CFIFOSEL, 0);
	usbhs_pipe_disable(pipe);

	do {
		val  = usbhsp_pipectrl_get(pipe);
		val &= CSSTS | PID_MASK;
		if (!val)
			return 0;

		udelay(10);

	} while (timeout--);

	return -EBUSY;
}

int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
{
	u16 val;

	val = usbhsp_pipectrl_get(pipe);
	if (val & BSTS)
		return 0;

	return -EBUSY;
}

/*
 *		PID ctrl
 */
static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
{
	u16 pid = usbhsp_pipectrl_get(pipe);

	pid &= PID_MASK;

	/*
	 * see
	 * "Pipe n Control Register" - "PID"
	 */
	switch (pid) {
	case PID_STALL11:
		usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
		/* fall-through */
	case PID_STALL10:
		usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
	}
}

void usbhs_pipe_disable(struct usbhs_pipe *pipe)
{
	int timeout = 1024;
	u16 val;

	/* see "Pipe n Control Register" - "PID" */
	__usbhsp_pid_try_nak_if_stall(pipe);

	usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);

	do {
		val  = usbhsp_pipectrl_get(pipe);
		val &= PBUSY;
		if (!val)
			break;

		udelay(10);
	} while (timeout--);
}

void usbhs_pipe_enable(struct usbhs_pipe *pipe)
{
	/* see "Pipe n Control Register" - "PID" */
	__usbhsp_pid_try_nak_if_stall(pipe);

	usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
}

void usbhs_pipe_stall(struct usbhs_pipe *pipe)
{
	u16 pid = usbhsp_pipectrl_get(pipe);

	pid &= PID_MASK;

	/*
	 * see
	 * "Pipe n Control Register" - "PID"
	 */
	switch (pid) {
	case PID_NAK:
		usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
		break;
	case PID_BUF:
		usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
		break;
	}
}

int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
{
	u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;

	return (int)(pid == PID_STALL10 || pid == PID_STALL11);
}

void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
{
	if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
		return;

	/*
	 * clear and disable transfer counter for IN/OUT pipe
	 */
	usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);

	/*
	 * Only IN direction bulk pipe can use transfer count.
	 * Without using this function,
	 * received data will break if it was large data size.
	 * see PIPEnTRN/PIPEnTRE for detail
	 */
	if (usbhs_pipe_is_dir_in(pipe)) {
		int maxp = usbhs_pipe_get_maxpacket(pipe);

		usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
		usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
	}
}


/*
 *		pipe setup
 */
static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
{
	/*
	 * only ISO / BULK pipe can use double buffer
	 */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
		return 1;

	return 0;
}

static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
				int is_host,
				int dir_in)
{
	u16 type = 0;
	u16 bfre = 0;
	u16 dblb = 0;
	u16 cntmd = 0;
	u16 dir = 0;
	u16 epnum = 0;
	u16 shtnak = 0;
	u16 type_array[] = {
		[USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
		[USB_ENDPOINT_XFER_INT]  = TYPE_INT,
		[USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
	};
	int is_double = usbhsp_possible_double_buffer(pipe);

	if (usbhs_pipe_is_dcp(pipe))
		return -EINVAL;

	/*
	 * PIPECFG
	 *
	 * see
	 *  - "Register Descriptions" - "PIPECFG" register
	 *  - "Features"  - "Pipe configuration"
	 *  - "Operation" - "Pipe Control"
	 */

	/* TYPE */
	type = type_array[usbhs_pipe_type(pipe)];

	/* BFRE */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
		bfre = 0; /* FIXME */

	/* DBLB */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
		dblb = (is_double) ? DBLB : 0;

	/* CNTMD */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
		cntmd = 0; /* FIXME */

	/* DIR */
	if (dir_in)
		usbhsp_flags_set(pipe, IS_DIR_HOST);

	if (!!is_host ^ !!dir_in)
		dir |= DIR_OUT;

	if (!dir)
		usbhsp_flags_set(pipe, IS_DIR_IN);

	/* SHTNAK */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
	    !dir)
		shtnak = SHTNAK;

	/* EPNUM */
	epnum = 0; /* see usbhs_pipe_config_update() */

	return	type	|
		bfre	|
		dblb	|
		cntmd	|
		dir	|
		shtnak	|
		epnum;
}

static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
	struct device *dev = usbhs_priv_to_dev(priv);
	int pipe_num = usbhs_pipe_number(pipe);
	int is_double = usbhsp_possible_double_buffer(pipe);
	u16 buff_size;
	u16 bufnmb;
	u16 bufnmb_cnt;

	/*
	 * PIPEBUF
	 *
	 * see
	 *  - "Register Descriptions" - "PIPEBUF" register
	 *  - "Features"  - "Pipe configuration"
	 *  - "Operation" - "FIFO Buffer Memory"
	 *  - "Operation" - "Pipe Control"
	 *
	 * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
	 *
	 * BUFNMB:	PIPE
	 * 0:		pipe0 (DCP 256byte)
	 * 1:		-
	 * 2:		-
	 * 3:		-
	 * 4:		pipe6 (INT 64byte)
	 * 5:		pipe7 (INT 64byte)
	 * 6:		pipe8 (INT 64byte)
	 * 7:		pipe9 (INT 64byte)
	 * 8 - xx:	free (for BULK, ISOC)
	 */

	/*
	 * FIXME
	 *
	 * it doesn't have good buffer allocator
	 *
	 * DCP : 256 byte
	 * BULK: 512 byte
	 * INT :  64 byte
	 * ISOC: 512 byte
	 */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
		buff_size = 256;
	else if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
		buff_size = 64;
	else
		buff_size = 512;

	/* change buff_size to register value */
	bufnmb_cnt = (buff_size / 64) - 1;

	/* BUFNMB has been reserved for INT pipe
	 * see above */
	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
		bufnmb = pipe_num - 2;
	} else {
		bufnmb = info->bufnmb_last;
		info->bufnmb_last += bufnmb_cnt + 1;

		/*
		 * double buffer
		 */
		if (is_double)
			info->bufnmb_last += bufnmb_cnt + 1;
	}

	dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
		pipe_num, buff_size, bufnmb);

	return	(0x1f & bufnmb_cnt)	<< 10 |
		(0xff & bufnmb)		<<  0;
}

void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
			      u16 epnum, u16 maxp)
{
	if (devsel > 0xA) {
		struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
		struct device *dev = usbhs_priv_to_dev(priv);

		dev_err(dev, "devsel error %d\n", devsel);

		devsel = 0;
	}

	usbhsp_pipe_barrier(pipe);

	pipe->maxp = maxp;

	usbhsp_pipe_select(pipe);
	usbhsp_pipe_maxp_set(pipe, 0xFFFF,
			     (devsel << 12) |
			     maxp);

	if (!usbhs_pipe_is_dcp(pipe))
		usbhsp_pipe_cfg_set(pipe,  0x000F, epnum);
}

/*
 *		pipe control
 */
int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
{
	/*
	 * see
	 *	usbhs_pipe_config_update()
	 *	usbhs_dcp_malloc()
	 */
	return pipe->maxp;
}

int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
{
	return usbhsp_flags_has(pipe, IS_DIR_IN);
}

int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
{
	return usbhsp_flags_has(pipe, IS_DIR_HOST);
}

int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
{
	return usbhsp_flags_has(pipe, IS_RUNNING);
}

void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
{
	if (running)
		usbhsp_flags_set(pipe, IS_RUNNING);
	else
		usbhsp_flags_clr(pipe, IS_RUNNING);
}

void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
{
	u16 mask = (SQCLR | SQSET);
	u16 val;

	/*
	 * sequence
	 *  0  : data0
	 *  1  : data1
	 *  -1 : no change
	 */
	switch (sequence) {
	case 0:
		val = SQCLR;
		break;
	case 1:
		val = SQSET;
		break;
	default:
		return;
	}

	usbhsp_pipectrl_set(pipe, mask, val);
}

void usbhs_pipe_clear(struct usbhs_pipe *pipe)
{
	usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
	usbhsp_pipectrl_set(pipe, ACLRM, 0);
}

static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
{
	struct usbhs_pipe *pos, *pipe;
	int i;

	/*
	 * find target pipe
	 */
	pipe = NULL;
	usbhs_for_each_pipe_with_dcp(pos, priv, i) {
		if (!usbhs_pipe_type_is(pos, type))
			continue;
		if (usbhsp_flags_has(pos, IS_USED))
			continue;

		pipe = pos;
		break;
	}

	if (!pipe)
		return NULL;

	/*
	 * initialize pipe flags
	 */
	usbhsp_flags_init(pipe);
	usbhsp_flags_set(pipe, IS_USED);

	return pipe;
}

static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
{
	usbhsp_flags_init(pipe);
}

void usbhs_pipe_init(struct usbhs_priv *priv,
		     int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
{
	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
	struct usbhs_pipe *pipe;
	int i;

	/*
	 * FIXME
	 *
	 * driver needs good allocator.
	 *
	 * find first free buffer area (BULK, ISOC)
	 * (DCP, INT area is fixed)
	 *
	 * buffer number 0 - 3 have been reserved for DCP
	 * see
	 *	usbhsp_to_bufnmb
	 */
	info->bufnmb_last = 4;
	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
		if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
			info->bufnmb_last++;

		usbhsp_flags_init(pipe);
		pipe->fifo = NULL;
		pipe->mod_private = NULL;
		INIT_LIST_HEAD(&pipe->list);

		/* pipe force init */
		usbhs_pipe_clear(pipe);
	}

	info->dma_map_ctrl = dma_map_ctrl;
}

struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
				     int endpoint_type,
				     int dir_in)
{
	struct device *dev = usbhs_priv_to_dev(priv);
	struct usbhs_pipe *pipe;
	int is_host = usbhs_mod_is_host(priv);
	int ret;
	u16 pipecfg, pipebuf;

	pipe = usbhsp_get_pipe(priv, endpoint_type);
	if (!pipe) {
		dev_err(dev, "can't get pipe (%s)\n",
			usbhsp_pipe_name[endpoint_type]);
		return NULL;
	}

	INIT_LIST_HEAD(&pipe->list);

	usbhs_pipe_disable(pipe);

	/* make sure pipe is not busy */
	ret = usbhsp_pipe_barrier(pipe);
	if (ret < 0) {
		dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
		return NULL;
	}

	pipecfg  = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
	pipebuf  = usbhsp_setup_pipebuff(pipe);

	usbhsp_pipe_select(pipe);
	usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
	usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
	usbhs_pipe_clear(pipe);

	usbhs_pipe_sequence_data0(pipe);

	dev_dbg(dev, "enable pipe %d : %s (%s)\n",
		usbhs_pipe_number(pipe),
		usbhs_pipe_name(pipe),
		usbhs_pipe_is_dir_in(pipe) ? "in" : "out");

	/*
	 * epnum / maxp are still not set to this pipe.
	 * call usbhs_pipe_config_update() after this function !!
	 */

	return pipe;
}

void usbhs_pipe_free(struct usbhs_pipe *pipe)
{
	usbhsp_put_pipe(pipe);
}

void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
{
	if (pipe->fifo)
		pipe->fifo->pipe = NULL;

	pipe->fifo = fifo;

	if (fifo)
		fifo->pipe = pipe;
}


/*
 *		dcp control
 */
struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
{
	struct usbhs_pipe *pipe;

	pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
	if (!pipe)
		return NULL;

	INIT_LIST_HEAD(&pipe->list);

	/*
	 * call usbhs_pipe_config_update() after this function !!
	 */

	return pipe;
}

void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

	WARN_ON(!usbhs_pipe_is_dcp(pipe));

	usbhs_pipe_enable(pipe);

	if (!usbhs_mod_is_host(priv)) /* funconly */
		usbhsp_pipectrl_set(pipe, CCPL, CCPL);
}

void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
{
	usbhsp_pipe_cfg_set(pipe, DIR_OUT,
			    dir_out ? DIR_OUT : 0);
}

/*
 *		pipe module function
 */
int usbhs_pipe_probe(struct usbhs_priv *priv)
{
	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
	struct usbhs_pipe *pipe;
	struct device *dev = usbhs_priv_to_dev(priv);
	u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
	int pipe_size = usbhs_get_dparam(priv, pipe_size);
	int i;

	/* This driver expects 1st pipe is DCP */
	if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
		dev_err(dev, "1st PIPE is not DCP\n");
		return -EINVAL;
	}

	info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
	if (!info->pipe) {
		dev_err(dev, "Could not allocate pipe\n");
		return -ENOMEM;
	}

	info->size = pipe_size;

	/*
	 * init pipe
	 */
	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
		pipe->priv = priv;

		usbhs_pipe_type(pipe) =
			pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;

		dev_dbg(dev, "pipe %x\t: %s\n",
			i, usbhsp_pipe_name[pipe_type[i]]);
	}

	return 0;
}

void usbhs_pipe_remove(struct usbhs_priv *priv)
{
	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

	kfree(info->pipe);
}