summaryrefslogtreecommitdiff
path: root/board/esd/cpci750/mpsc.c
blob: fa8d3bda964659ceb47a28912dfe41b09bd4af36 (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
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
/*
 * (C) Copyright 2001
 * John Clemens <clemens@mclx.com>, Mission Critical Linux, Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 */

/*************************************************************************
 * changes for Marvell DB64360 eval board 2003 by Ingo Assmus <ingo.assmus@keymile.com>
 *
  ************************************************************************/

/*
 * mpsc.c - driver for console over the MPSC.
 */


#include <common.h>
#include <config.h>
#include <asm/cache.h>

#include <malloc.h>
#include "mpsc.h"

#include "mv_regs.h"

#include "../../Marvell/include/memory.h"

DECLARE_GLOBAL_DATA_PTR;

/* Define this if you wish to use the MPSC as a register based UART.
 * This will force the serial port to not use the SDMA engine at all.
 */

#undef CONFIG_MPSC_DEBUG_PORT


int (*mpsc_putchar) (char ch) = mpsc_putchar_early;
char (*mpsc_getchar) (void) = mpsc_getchar_debug;
int (*mpsc_test_char) (void) = mpsc_test_char_debug;


static volatile unsigned int *rx_desc_base = NULL;
static unsigned int rx_desc_index = 0;
static volatile unsigned int *tx_desc_base = NULL;
static unsigned int tx_desc_index = 0;

/* local function declarations */
static int galmpsc_connect (int channel, int connect);
static int galmpsc_route_rx_clock (int channel, int brg);
static int galmpsc_route_tx_clock (int channel, int brg);
static int galmpsc_write_config_regs (int mpsc, int mode);
static int galmpsc_config_channel_regs (int mpsc);
static int galmpsc_set_char_length (int mpsc, int value);
static int galmpsc_set_stop_bit_length (int mpsc, int value);
static int galmpsc_set_parity (int mpsc, int value);
static int galmpsc_enter_hunt (int mpsc);
static int galmpsc_set_brkcnt (int mpsc, int value);
static int galmpsc_set_tcschar (int mpsc, int value);
static int galmpsc_set_snoop (int mpsc, int value);
static int galmpsc_shutdown (int mpsc);

static int galsdma_set_RFT (int channel);
static int galsdma_set_SFM (int channel);
static int galsdma_set_rxle (int channel);
static int galsdma_set_txle (int channel);
static int galsdma_set_burstsize (int channel, unsigned int value);
static int galsdma_set_RC (int channel, unsigned int value);

static int galbrg_set_CDV (int channel, int value);
static int galbrg_enable (int channel);
static int galbrg_disable (int channel);
static int galbrg_set_clksrc (int channel, int value);
static int galbrg_set_CUV (int channel, int value);

static void galsdma_enable_rx (void);
static int galsdma_set_mem_space (unsigned int memSpace,
				  unsigned int memSpaceTarget,
				  unsigned int memSpaceAttr,
				  unsigned int baseAddress,
				  unsigned int size);


#define SOFTWARE_CACHE_MANAGEMENT

#ifdef SOFTWARE_CACHE_MANAGEMENT
#define FLUSH_DCACHE(a,b)		 if(dcache_status()){clean_dcache_range((u32)(a),(u32)(b));}
#define FLUSH_AND_INVALIDATE_DCACHE(a,b) if(dcache_status()){flush_dcache_range((u32)(a),(u32)(b));}
#define INVALIDATE_DCACHE(a,b)		 if(dcache_status()){invalidate_dcache_range((u32)(a),(u32)(b));}
#else
#define FLUSH_DCACHE(a,b)
#define FLUSH_AND_INVALIDATE_DCACHE(a,b)
#define INVALIDATE_DCACHE(a,b)
#endif

#ifdef CONFIG_MPSC_DEBUG_PORT
static void mpsc_debug_init (void)
{

	volatile unsigned int temp;

	/* Clear the CFR  (CHR4) */
	/* Write random 'Z' bit (bit 29) of CHR4 to enable debug uart *UNDOCUMENTED FEATURE* */
	temp = GTREGREAD (GALMPSC_CHANNELREG_4 + (CHANNEL * GALMPSC_REG_GAP));
	temp &= 0xffffff00;
	temp |= BIT29;
	GT_REG_WRITE (GALMPSC_CHANNELREG_4 + (CHANNEL * GALMPSC_REG_GAP),
		      temp);

	/* Set the Valid bit 'V' (bit 12) and int generation bit 'INT' (bit 15) */
	temp = GTREGREAD (GALMPSC_CHANNELREG_5 + (CHANNEL * GALMPSC_REG_GAP));
	temp |= (BIT12 | BIT15);
	GT_REG_WRITE (GALMPSC_CHANNELREG_5 + (CHANNEL * GALMPSC_REG_GAP),
		      temp);

	/* Set int mask */
	temp = GTREGREAD (GALMPSC_0_INT_MASK);
	temp |= BIT6;
	GT_REG_WRITE (GALMPSC_0_INT_MASK, temp);
}
#endif

char mpsc_getchar_debug (void)
{
	volatile int temp;
	volatile unsigned int cause;

	cause = GTREGREAD (GALMPSC_0_INT_CAUSE);
	while ((cause & BIT6) == 0) {
		cause = GTREGREAD (GALMPSC_0_INT_CAUSE);
	}

	temp = GTREGREAD (GALMPSC_CHANNELREG_10 +
			  (CHANNEL * GALMPSC_REG_GAP));
	/* By writing 1's to the set bits, the register is cleared */
	GT_REG_WRITE (GALMPSC_CHANNELREG_10 + (CHANNEL * GALMPSC_REG_GAP),
		      temp);
	GT_REG_WRITE (GALMPSC_0_INT_CAUSE, cause & ~BIT6);
	return (temp >> 16) & 0xff;
}

/* special function for running out of flash.  doesn't modify any
 * global variables [josh] */
int mpsc_putchar_early (char ch)
{
	int mpsc = CHANNEL;
	int temp =
		GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
	galmpsc_set_tcschar (mpsc, ch);
	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP),
		      temp | 0x200);

#define MAGIC_FACTOR	(10*1000000)

	udelay (MAGIC_FACTOR / gd->baudrate);
	return 0;
}

/* This is used after relocation, see serial.c and mpsc_init2 */
static int mpsc_putchar_sdma (char ch)
{
	volatile unsigned int *p;
	unsigned int temp;


	/* align the descriptor */
	p = tx_desc_base;
	memset ((void *) p, 0, 8 * sizeof (unsigned int));

	/* fill one 64 bit buffer */
	/* word swap, pad with 0 */
	p[4] = 0;		/* x */
	p[5] = (unsigned int) ch;	/* x */

	/* CHANGED completely according to GT64260A dox - NTL */
	p[0] = 0x00010001;	/* 0 */
	p[1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;	/* 4 */
	p[2] = 0;		/* 8 */
	p[3] = (unsigned int) &p[4];	/* c */

#if 0
	p[9] = DESC_FIRST | DESC_LAST;
	p[10] = (unsigned int) &p[0];
	p[11] = (unsigned int) &p[12];
#endif

	FLUSH_DCACHE (&p[0], &p[8]);

	GT_REG_WRITE (GALSDMA_0_CUR_TX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
		      (unsigned int) &p[0]);
	GT_REG_WRITE (GALSDMA_0_FIR_TX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
		      (unsigned int) &p[0]);

	temp = GTREGREAD (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF));
	temp |= (TX_DEMAND | TX_STOP);
	GT_REG_WRITE (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF), temp);

	INVALIDATE_DCACHE (&p[1], &p[2]);

	while (p[1] & DESC_OWNER_BIT) {
		udelay (100);
		INVALIDATE_DCACHE (&p[1], &p[2]);
	}
	return 0;
}

char mpsc_getchar_sdma (void)
{
	static unsigned int done = 0;
	volatile char ch;
	unsigned int len = 0, idx = 0, temp;

	volatile unsigned int *p;


	do {
		p = &rx_desc_base[rx_desc_index * 8];

		INVALIDATE_DCACHE (&p[0], &p[1]);
		/* Wait for character */
		while (p[1] & DESC_OWNER_BIT) {
			udelay (100);
			INVALIDATE_DCACHE (&p[0], &p[1]);
		}

		/* Handle error case */
		if (p[1] & (1 << 15)) {
			printf ("oops, error: %08x\n", p[1]);

			temp = GTREGREAD (GALMPSC_CHANNELREG_2 +
					  (CHANNEL * GALMPSC_REG_GAP));
			temp |= (1 << 23);
			GT_REG_WRITE (GALMPSC_CHANNELREG_2 +
				      (CHANNEL * GALMPSC_REG_GAP), temp);

			/* Can't poll on abort bit, so we just wait. */
			udelay (100);

			galsdma_enable_rx ();
		}

		/* Number of bytes left in this descriptor */
		len = p[0] & 0xffff;

		if (len) {
			/* Where to look */
			idx = 5;
			if (done > 3)
				idx = 4;
			if (done > 7)
				idx = 7;
			if (done > 11)
				idx = 6;

			INVALIDATE_DCACHE (&p[idx], &p[idx + 1]);
			ch = p[idx] & 0xff;
			done++;
		}

		if (done < len) {
			/* this descriptor has more bytes still
			 * shift down the char we just read, and leave the
			 * buffer in place for the next time around
			 */
			p[idx] = p[idx] >> 8;
			FLUSH_DCACHE (&p[idx], &p[idx + 1]);
		}

		if (done == len) {
			/* nothing left in this descriptor.
			 * go to next one
			 */
			p[1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;
			p[0] = 0x00100000;
			FLUSH_DCACHE (&p[0], &p[1]);
			/* Next descriptor */
			rx_desc_index = (rx_desc_index + 1) % RX_DESC;
			done = 0;
		}
	} while (len == 0);	/* galileo bug.. len might be zero */

	return ch;
}


int mpsc_test_char_debug (void)
{
	if ((GTREGREAD (GALMPSC_0_INT_CAUSE) & BIT6) == 0)
		return 0;
	else {
		return 1;
	}
}


int mpsc_test_char_sdma (void)
{
	volatile unsigned int *p = &rx_desc_base[rx_desc_index * 8];

	INVALIDATE_DCACHE (&p[1], &p[2]);

	if (p[1] & DESC_OWNER_BIT)
		return 0;
	else
		return 1;
}

int mpsc_init (int baud)
{
	/* BRG CONFIG */
	galbrg_set_baudrate (CHANNEL, baud);
	galbrg_set_clksrc (CHANNEL, 8);	/* set source=Tclk */
	galbrg_set_CUV (CHANNEL, 0);	/* set up CountUpValue */
	galbrg_enable (CHANNEL);	/* Enable BRG */

	/* Set up clock routing */
	galmpsc_connect (CHANNEL, GALMPSC_CONNECT);	/* connect it */

	galmpsc_route_rx_clock (CHANNEL, CHANNEL);	/* chosse BRG0 for Rx */
	galmpsc_route_tx_clock (CHANNEL, CHANNEL);	/* chose BRG0 for Tx */

	/* reset MPSC state */
	galmpsc_shutdown (CHANNEL);

	/* SDMA CONFIG */
	galsdma_set_burstsize (CHANNEL, L1_CACHE_BYTES / 8);	/* in 64 bit words (8 bytes) */
	galsdma_set_txle (CHANNEL);
	galsdma_set_rxle (CHANNEL);
	galsdma_set_RC (CHANNEL, 0xf);
	galsdma_set_SFM (CHANNEL);
	galsdma_set_RFT (CHANNEL);

	/* MPSC CONFIG */
	galmpsc_write_config_regs (CHANNEL, GALMPSC_UART);
	galmpsc_config_channel_regs (CHANNEL);
	galmpsc_set_char_length (CHANNEL, GALMPSC_CHAR_LENGTH_8);	/* 8 */
	galmpsc_set_parity (CHANNEL, GALMPSC_PARITY_NONE);	/* N */
	galmpsc_set_stop_bit_length (CHANNEL, GALMPSC_STOP_BITS_1);	/* 1 */

#ifdef CONFIG_MPSC_DEBUG_PORT
	mpsc_debug_init ();
#endif

	/* COMM_MPSC CONFIG */
#ifdef SOFTWARE_CACHE_MANAGEMENT
	galmpsc_set_snoop (CHANNEL, 0);	/* disable snoop */
#else
	galmpsc_set_snoop (CHANNEL, 1);	/* enable snoop */
#endif

	return 0;
}


void mpsc_sdma_init (void)
{
/* Setup SDMA channel0 SDMA_CONFIG_REG*/
	GT_REG_WRITE (SDMA_CONFIG_REG (0), 0x000020ff);

/*  Enable MPSC-Window0 for DRAM Bank0   */
	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_0_BIT,
				   MV64360_SDMA_DRAM_CS_0_TARGET,
				   0,
				   memoryGetBankBaseAddress
				   (CS_0_LOW_DECODE_ADDRESS),
				   memoryGetBankSize (BANK0)) != true)
		printf ("%s: SDMA_Window0 memory setup failed !!! \n",
			__FUNCTION__);


/*  Disable MPSC-Window1    */
	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_1_BIT,
				   MV64360_SDMA_DRAM_CS_0_TARGET,
				   0,
				   memoryGetBankBaseAddress
				   (CS_1_LOW_DECODE_ADDRESS),
				   memoryGetBankSize (BANK3)) != true)
		printf ("%s: SDMA_Window1 memory setup failed !!! \n",
			__FUNCTION__);


/*  Disable MPSC-Window2 */
	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_2_BIT,
				   MV64360_SDMA_DRAM_CS_0_TARGET,
				   0,
				   memoryGetBankBaseAddress
				   (CS_2_LOW_DECODE_ADDRESS),
				   memoryGetBankSize (BANK3)) != true)
		printf ("%s: SDMA_Window2 memory setup failed !!! \n",
			__FUNCTION__);


/*  Disable MPSC-Window3 */
	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_3_BIT,
				   MV64360_SDMA_DRAM_CS_0_TARGET,
				   0,
				   memoryGetBankBaseAddress
				   (CS_3_LOW_DECODE_ADDRESS),
				   memoryGetBankSize (BANK3)) != true)
		printf ("%s: SDMA_Window3 memory setup failed !!! \n",
			__FUNCTION__);

/*  Setup MPSC0 access mode Window0 full access */
	GT_SET_REG_BITS (MPSC0_ACCESS_PROTECTION_REG,
			 (MV64360_SDMA_WIN_ACCESS_FULL <<
			  (MV64360_CUNIT_BASE_ADDR_WIN_0_BIT * 2)));

/*  Setup MPSC1 access mode Window1 full access */
	GT_SET_REG_BITS (MPSC1_ACCESS_PROTECTION_REG,
			 (MV64360_SDMA_WIN_ACCESS_FULL <<
			  (MV64360_CUNIT_BASE_ADDR_WIN_0_BIT * 2)));

/* Setup MPSC internal address space base address	*/
	GT_REG_WRITE (CUNIT_INTERNAL_SPACE_BASE_ADDR_REG, CFG_GT_REGS);

/* no high address remap*/
	GT_REG_WRITE (CUNIT_HIGH_ADDR_REMAP_REG0, 0x00);
	GT_REG_WRITE (CUNIT_HIGH_ADDR_REMAP_REG1, 0x00);

/* clear interrupt cause register for MPSC (fault register)*/
	GT_REG_WRITE (CUNIT_INTERRUPT_CAUSE_REG, 0x00);
}


void mpsc_init2 (void)
{
	int i;

#ifndef CONFIG_MPSC_DEBUG_PORT
	mpsc_putchar = mpsc_putchar_sdma;
	mpsc_getchar = mpsc_getchar_sdma;
	mpsc_test_char = mpsc_test_char_sdma;
#endif
	/* RX descriptors */
	rx_desc_base = (unsigned int *) malloc (((RX_DESC + 1) * 8) *
						sizeof (unsigned int));

	/* align descriptors */
	rx_desc_base = (unsigned int *)
		(((unsigned int) rx_desc_base + 32) & 0xFFFFFFF0);

	rx_desc_index = 0;

	memset ((void *) rx_desc_base, 0,
		(RX_DESC * 8) * sizeof (unsigned int));

	for (i = 0; i < RX_DESC; i++) {
		rx_desc_base[i * 8 + 3] = (unsigned int) &rx_desc_base[i * 8 + 4];	/* Buffer */
		rx_desc_base[i * 8 + 2] = (unsigned int) &rx_desc_base[(i + 1) * 8];	/* Next descriptor */
		rx_desc_base[i * 8 + 1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;	/* Command & control */
		rx_desc_base[i * 8] = 0x00100000;
	}
	rx_desc_base[(i - 1) * 8 + 2] = (unsigned int) &rx_desc_base[0];

	FLUSH_DCACHE (&rx_desc_base[0], &rx_desc_base[RX_DESC * 8]);
	GT_REG_WRITE (GALSDMA_0_CUR_RX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
		      (unsigned int) &rx_desc_base[0]);

	/* TX descriptors */
	tx_desc_base = (unsigned int *) malloc (((TX_DESC + 1) * 8) *
						sizeof (unsigned int));

	/* align descriptors */
	tx_desc_base = (unsigned int *)
		(((unsigned int) tx_desc_base + 32) & 0xFFFFFFF0);

	tx_desc_index = -1;

	memset ((void *) tx_desc_base, 0,
		(TX_DESC * 8) * sizeof (unsigned int));

	for (i = 0; i < TX_DESC; i++) {
		tx_desc_base[i * 8 + 5] = (unsigned int) 0x23232323;
		tx_desc_base[i * 8 + 4] = (unsigned int) 0x23232323;
		tx_desc_base[i * 8 + 3] =
			(unsigned int) &tx_desc_base[i * 8 + 4];
		tx_desc_base[i * 8 + 2] =
			(unsigned int) &tx_desc_base[(i + 1) * 8];
		tx_desc_base[i * 8 + 1] =
			DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;

		/* set sbytecnt and shadow byte cnt to 1 */
		tx_desc_base[i * 8] = 0x00010001;
	}
	tx_desc_base[(i - 1) * 8 + 2] = (unsigned int) &tx_desc_base[0];

	FLUSH_DCACHE (&tx_desc_base[0], &tx_desc_base[TX_DESC * 8]);

	udelay (100);

	galsdma_enable_rx ();

	return;
}

int galbrg_set_baudrate (int channel, int rate)
{
	int clock;

	galbrg_disable (channel);	/*ok */

#ifdef ZUMA_NTL
	/* from tclk */
	clock = (CFG_TCLK / (16 * rate)) - 1;
#else
	clock = (CFG_TCLK / (16 * rate)) - 1;
#endif

	galbrg_set_CDV (channel, clock);	/* set timer Reg. for BRG */

	galbrg_enable (channel);

	gd->baudrate = rate;

	return 0;
}

/* ------------------------------------------------------------------ */

/* Below are all the private functions that no one else needs */

static int galbrg_set_CDV (int channel, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
	temp &= 0xFFFF0000;
	temp |= (value & 0x0000FFFF);
	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);

	return 0;
}

static int galbrg_enable (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
	temp |= 0x00010000;
	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);

	return 0;
}

static int galbrg_disable (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
	temp &= 0xFFFEFFFF;
	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);

	return 0;
}

static int galbrg_set_clksrc (int channel, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
	temp &= 0xFFC3FFFF;	/* Bit 18 - 21 (MV 64260 18-22) */
	temp |= (value << 18);
	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
	return 0;
}

static int galbrg_set_CUV (int channel, int value)
{
	/* set CountUpValue */
	GT_REG_WRITE (GALBRG_0_BTREG + (channel * GALBRG_REG_GAP), value);

	return 0;
}

#if 0
static int galbrg_reset (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
	temp |= 0x20000;
	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);

	return 0;
}
#endif

static int galsdma_set_RFT (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
	temp |= 0x00000001;
	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
		      temp);

	return 0;
}

static int galsdma_set_SFM (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
	temp |= 0x00000002;
	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
		      temp);

	return 0;
}

static int galsdma_set_rxle (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
	temp |= 0x00000040;
	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
		      temp);

	return 0;
}

static int galsdma_set_txle (int channel)
{
	unsigned int temp;

	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
	temp |= 0x00000080;
	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
		      temp);

	return 0;
}

static int galsdma_set_RC (int channel, unsigned int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
	temp &= ~0x0000003c;
	temp |= (value << 2);
	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
		      temp);

	return 0;
}

static int galsdma_set_burstsize (int channel, unsigned int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
	temp &= 0xFFFFCFFF;
	switch (value) {
	case 8:
		GT_REG_WRITE (GALSDMA_0_CONF_REG +
			      (channel * GALSDMA_REG_DIFF),
			      (temp | (0x3 << 12)));
		break;

	case 4:
		GT_REG_WRITE (GALSDMA_0_CONF_REG +
			      (channel * GALSDMA_REG_DIFF),
			      (temp | (0x2 << 12)));
		break;

	case 2:
		GT_REG_WRITE (GALSDMA_0_CONF_REG +
			      (channel * GALSDMA_REG_DIFF),
			      (temp | (0x1 << 12)));
		break;

	case 1:
		GT_REG_WRITE (GALSDMA_0_CONF_REG +
			      (channel * GALSDMA_REG_DIFF),
			      (temp | (0x0 << 12)));
		break;

	default:
		return -1;
		break;
	}

	return 0;
}

static int galmpsc_connect (int channel, int connect)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_ROUTING_REGISTER);

	if ((channel == 0) && connect)
		temp &= ~0x00000007;
	else if ((channel == 1) && connect)
		temp &= ~(0x00000007 << 6);
	else if ((channel == 0) && !connect)
		temp |= 0x00000007;
	else
		temp |= (0x00000007 << 6);

	/* Just in case... */
	temp &= 0x3fffffff;

	GT_REG_WRITE (GALMPSC_ROUTING_REGISTER, temp);

	return 0;
}

static int galmpsc_route_rx_clock (int channel, int brg)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_RxC_ROUTE);

	if (channel == 0) {
		temp &= ~0x0000000F;
		temp |= brg;
	} else {
		temp &= ~0x00000F00;
		temp |= (brg << 8);
	}

	GT_REG_WRITE (GALMPSC_RxC_ROUTE, temp);

	return 0;
}

static int galmpsc_route_tx_clock (int channel, int brg)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_TxC_ROUTE);

	if (channel == 0) {
		temp &= ~0x0000000F;
		temp |= brg;
	} else {
		temp &= ~0x00000F00;
		temp |= (brg << 8);
	}

	GT_REG_WRITE (GALMPSC_TxC_ROUTE, temp);

	return 0;
}

static int galmpsc_write_config_regs (int mpsc, int mode)
{
	if (mode == GALMPSC_UART) {
		/* Main config reg Low (Null modem, Enable Tx/Rx, UART mode) */
		GT_REG_WRITE (GALMPSC_MCONF_LOW + (mpsc * GALMPSC_REG_GAP),
			      0x000004c4);

		/* Main config reg High (32x Rx/Tx clock mode, width=8bits */
		GT_REG_WRITE (GALMPSC_MCONF_HIGH + (mpsc * GALMPSC_REG_GAP),
			      0x024003f8);
		/*        22 2222 1111 */
		/*        54 3210 9876 */
		/* 0000 0010 0000 0000 */
		/*       1 */
		/*       098 7654 3210 */
		/* 0000 0011 1111 1000 */
	} else
		return -1;

	return 0;
}

static int galmpsc_config_channel_regs (int mpsc)
{
	GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_3 + (mpsc * GALMPSC_REG_GAP), 1);
	GT_REG_WRITE (GALMPSC_CHANNELREG_4 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_5 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_6 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_7 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_8 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_9 + (mpsc * GALMPSC_REG_GAP), 0);
	GT_REG_WRITE (GALMPSC_CHANNELREG_10 + (mpsc * GALMPSC_REG_GAP), 0);

	galmpsc_set_brkcnt (mpsc, 0x3);
	galmpsc_set_tcschar (mpsc, 0xab);

	return 0;
}

static int galmpsc_set_brkcnt (int mpsc, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP));
	temp &= 0x0000FFFF;
	temp |= (value << 16);
	GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), temp);

	return 0;
}

static int galmpsc_set_tcschar (int mpsc, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP));
	temp &= 0xFFFF0000;
	temp |= value;
	GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), temp);

	return 0;
}

static int galmpsc_set_char_length (int mpsc, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP));
	temp &= 0xFFFFCFFF;
	temp |= (value << 12);
	GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), temp);

	return 0;
}

static int galmpsc_set_stop_bit_length (int mpsc, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP));
	temp &= 0xFFFFBFFF;
	temp |= (value << 14);
	GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), temp);

	return 0;
}

static int galmpsc_set_parity (int mpsc, int value)
{
	unsigned int temp;

	temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
	if (value != -1) {
		temp &= 0xFFF3FFF3;
		temp |= ((value << 18) | (value << 2));
		temp |= ((value << 17) | (value << 1));
	} else {
		temp &= 0xFFF1FFF1;
	}

	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);

	return 0;
}

static int galmpsc_enter_hunt (int mpsc)
{
	int temp;

	temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
	temp |= 0x80000000;
	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);

	while (GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP)) &
	       MPSC_ENTER_HUNT) {
		udelay (1);
	}
	return 0;
}


static int galmpsc_shutdown (int mpsc)
{
	unsigned int temp;

	/* cause RX abort (clears RX) */
	temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
	temp |= MPSC_RX_ABORT | MPSC_TX_ABORT;
	temp &= ~MPSC_ENTER_HUNT;
	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);

	GT_REG_WRITE (GALSDMA_0_COM_REG, 0);
	GT_REG_WRITE (GALSDMA_0_COM_REG, SDMA_TX_ABORT | SDMA_RX_ABORT);

	/* shut down the MPSC */
	GT_REG_WRITE (GALMPSC_MCONF_LOW, 0);
	GT_REG_WRITE (GALMPSC_MCONF_HIGH, 0);
	GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), 0);

	udelay (100);

	/* shut down the sdma engines. */
	/* reset config to default */
	GT_REG_WRITE (GALSDMA_0_CONF_REG, 0x000000fc);

	udelay (100);

	/* clear the SDMA current and first TX and RX pointers */
	GT_REG_WRITE (GALSDMA_0_CUR_RX_PTR, 0);
	GT_REG_WRITE (GALSDMA_0_CUR_TX_PTR, 0);
	GT_REG_WRITE (GALSDMA_0_FIR_TX_PTR, 0);

	udelay (100);

	return 0;
}

static void galsdma_enable_rx (void)
{
	int temp;

	/* Enable RX processing */
	temp = GTREGREAD (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF));
	temp |= RX_ENABLE;
	GT_REG_WRITE (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF), temp);

	galmpsc_enter_hunt (CHANNEL);
}

static int galmpsc_set_snoop (int mpsc, int value)
{
	int reg =
		mpsc ? MPSC_1_ADDRESS_CONTROL_LOW :
		MPSC_0_ADDRESS_CONTROL_LOW;
	int temp = GTREGREAD (reg);

	if (value)
		temp |= (1 << 6) | (1 << 14) | (1 << 22) | (1 << 30);
	else
		temp &= ~((1 << 6) | (1 << 14) | (1 << 22) | (1 << 30));
	GT_REG_WRITE (reg, temp);
	return 0;
}

/*******************************************************************************
* galsdma_set_mem_space - Set MV64360 IDMA memory decoding map.
*
* DESCRIPTION:
*       the MV64360 SDMA has its own address decoding map that is de-coupled
*       from the CPU interface address decoding windows. The SDMA channels
*       share four address windows. Each region can be individually configured
*       by this function by associating it to a target interface and setting
*       base and size values.
*
*      NOTE!!!
*       The size must be in 64Kbyte granularity.
*       The base address must be aligned to the size.
*       The size must be a series of 1s followed by a series of zeros
*
* OUTPUT:
*       None.
*
* RETURN:
*       True for success, false otherwise.
*
*******************************************************************************/

static int galsdma_set_mem_space (unsigned int memSpace,
				  unsigned int memSpaceTarget,
				  unsigned int memSpaceAttr,
				  unsigned int baseAddress, unsigned int size)
{
	unsigned int temp;

	if (size == 0) {
		GT_RESET_REG_BITS (MV64360_CUNIT_BASE_ADDR_ENABLE_REG,
				   1 << memSpace);
		return true;
	}

	/* The base address must be aligned to the size.  */
	if (baseAddress % size != 0) {
		return false;
	}
	if (size < 0x10000) {
		return false;
	}

	/* Align size and base to 64K */
	baseAddress &= 0xffff0000;
	size &= 0xffff0000;
	temp = size >> 16;

	/* Checking that the size is a sequence of '1' followed by a
	   sequence of '0' starting from LSB to MSB. */
	while ((temp > 0) && (temp & 0x1)) {
		temp = temp >> 1;
	}

	if (temp != 0) {
		GT_REG_WRITE (MV64360_CUNIT_BASE_ADDR_REG0 + memSpace * 8,
			      (baseAddress | memSpaceTarget | memSpaceAttr));
		GT_REG_WRITE ((MV64360_CUNIT_SIZE0 + memSpace * 8),
			      (size - 1) & 0xffff0000);
		GT_RESET_REG_BITS (MV64360_CUNIT_BASE_ADDR_ENABLE_REG,
				   1 << memSpace);
	} else {
		/* An invalid size was specified */
		return false;
	}
	return true;
}