aboutsummaryrefslogtreecommitdiff
path: root/hw/gpio/aspeed_gpio.c
blob: 34d8acb0e37a72bfe8e8a098a33ad4feb1065139 (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
/*
 *  ASPEED GPIO Controller
 *
 *  Copyright (C) 2017-2019 IBM Corp.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "qemu/osdep.h"
#include "qemu/host-utils.h"
#include "qemu/log.h"
#include "hw/gpio/aspeed_gpio.h"
#include "include/hw/misc/aspeed_scu.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "hw/irq.h"
#include "migration/vmstate.h"

#define GPIOS_PER_REG 32
#define GPIOS_PER_SET GPIOS_PER_REG
#define GPIO_PIN_GAP_SIZE 4
#define GPIOS_PER_GROUP 8
#define GPIO_GROUP_SHIFT 3

/* GPIO Source Types */
#define ASPEED_CMD_SRC_MASK         0x01010101
#define ASPEED_SOURCE_ARM           0
#define ASPEED_SOURCE_LPC           1
#define ASPEED_SOURCE_COPROCESSOR   2
#define ASPEED_SOURCE_RESERVED      3

/* GPIO Interrupt Triggers */
/*
 *  For each set of gpios there are three sensitivity registers that control
 *  the interrupt trigger mode.
 *
 *  | 2 | 1 | 0 | trigger mode
 *  -----------------------------
 *  | 0 | 0 | 0 | falling-edge
 *  | 0 | 0 | 1 | rising-edge
 *  | 0 | 1 | 0 | level-low
 *  | 0 | 1 | 1 | level-high
 *  | 1 | X | X | dual-edge
 */
#define ASPEED_FALLING_EDGE 0
#define ASPEED_RISING_EDGE  1
#define ASPEED_LEVEL_LOW    2
#define ASPEED_LEVEL_HIGH   3
#define ASPEED_DUAL_EDGE    4

/* GPIO Register Address Offsets */
#define GPIO_ABCD_DATA_VALUE       (0x000 >> 2)
#define GPIO_ABCD_DIRECTION        (0x004 >> 2)
#define GPIO_ABCD_INT_ENABLE       (0x008 >> 2)
#define GPIO_ABCD_INT_SENS_0       (0x00C >> 2)
#define GPIO_ABCD_INT_SENS_1       (0x010 >> 2)
#define GPIO_ABCD_INT_SENS_2       (0x014 >> 2)
#define GPIO_ABCD_INT_STATUS       (0x018 >> 2)
#define GPIO_ABCD_RESET_TOLERANT   (0x01C >> 2)
#define GPIO_EFGH_DATA_VALUE       (0x020 >> 2)
#define GPIO_EFGH_DIRECTION        (0x024 >> 2)
#define GPIO_EFGH_INT_ENABLE       (0x028 >> 2)
#define GPIO_EFGH_INT_SENS_0       (0x02C >> 2)
#define GPIO_EFGH_INT_SENS_1       (0x030 >> 2)
#define GPIO_EFGH_INT_SENS_2       (0x034 >> 2)
#define GPIO_EFGH_INT_STATUS       (0x038 >> 2)
#define GPIO_EFGH_RESET_TOLERANT   (0x03C >> 2)
#define GPIO_ABCD_DEBOUNCE_1       (0x040 >> 2)
#define GPIO_ABCD_DEBOUNCE_2       (0x044 >> 2)
#define GPIO_EFGH_DEBOUNCE_1       (0x048 >> 2)
#define GPIO_EFGH_DEBOUNCE_2       (0x04C >> 2)
#define GPIO_DEBOUNCE_TIME_1       (0x050 >> 2)
#define GPIO_DEBOUNCE_TIME_2       (0x054 >> 2)
#define GPIO_DEBOUNCE_TIME_3       (0x058 >> 2)
#define GPIO_ABCD_COMMAND_SRC_0    (0x060 >> 2)
#define GPIO_ABCD_COMMAND_SRC_1    (0x064 >> 2)
#define GPIO_EFGH_COMMAND_SRC_0    (0x068 >> 2)
#define GPIO_EFGH_COMMAND_SRC_1    (0x06C >> 2)
#define GPIO_IJKL_DATA_VALUE       (0x070 >> 2)
#define GPIO_IJKL_DIRECTION        (0x074 >> 2)
#define GPIO_MNOP_DATA_VALUE       (0x078 >> 2)
#define GPIO_MNOP_DIRECTION        (0x07C >> 2)
#define GPIO_QRST_DATA_VALUE       (0x080 >> 2)
#define GPIO_QRST_DIRECTION        (0x084 >> 2)
#define GPIO_UVWX_DATA_VALUE       (0x088 >> 2)
#define GPIO_UVWX_DIRECTION        (0x08C >> 2)
#define GPIO_IJKL_COMMAND_SRC_0    (0x090 >> 2)
#define GPIO_IJKL_COMMAND_SRC_1    (0x094 >> 2)
#define GPIO_IJKL_INT_ENABLE       (0x098 >> 2)
#define GPIO_IJKL_INT_SENS_0       (0x09C >> 2)
#define GPIO_IJKL_INT_SENS_1       (0x0A0 >> 2)
#define GPIO_IJKL_INT_SENS_2       (0x0A4 >> 2)
#define GPIO_IJKL_INT_STATUS       (0x0A8 >> 2)
#define GPIO_IJKL_RESET_TOLERANT   (0x0AC >> 2)
#define GPIO_IJKL_DEBOUNCE_1       (0x0B0 >> 2)
#define GPIO_IJKL_DEBOUNCE_2       (0x0B4 >> 2)
#define GPIO_IJKL_INPUT_MASK       (0x0B8 >> 2)
#define GPIO_ABCD_DATA_READ        (0x0C0 >> 2)
#define GPIO_EFGH_DATA_READ        (0x0C4 >> 2)
#define GPIO_IJKL_DATA_READ        (0x0C8 >> 2)
#define GPIO_MNOP_DATA_READ        (0x0CC >> 2)
#define GPIO_QRST_DATA_READ        (0x0D0 >> 2)
#define GPIO_UVWX_DATA_READ        (0x0D4 >> 2)
#define GPIO_YZAAAB_DATA_READ      (0x0D8 >> 2)
#define GPIO_AC_DATA_READ          (0x0DC >> 2)
#define GPIO_MNOP_COMMAND_SRC_0    (0x0E0 >> 2)
#define GPIO_MNOP_COMMAND_SRC_1    (0x0E4 >> 2)
#define GPIO_MNOP_INT_ENABLE       (0x0E8 >> 2)
#define GPIO_MNOP_INT_SENS_0       (0x0EC >> 2)
#define GPIO_MNOP_INT_SENS_1       (0x0F0 >> 2)
#define GPIO_MNOP_INT_SENS_2       (0x0F4 >> 2)
#define GPIO_MNOP_INT_STATUS       (0x0F8 >> 2)
#define GPIO_MNOP_RESET_TOLERANT   (0x0FC >> 2)
#define GPIO_MNOP_DEBOUNCE_1       (0x100 >> 2)
#define GPIO_MNOP_DEBOUNCE_2       (0x104 >> 2)
#define GPIO_MNOP_INPUT_MASK       (0x108 >> 2)
#define GPIO_QRST_COMMAND_SRC_0    (0x110 >> 2)
#define GPIO_QRST_COMMAND_SRC_1    (0x114 >> 2)
#define GPIO_QRST_INT_ENABLE       (0x118 >> 2)
#define GPIO_QRST_INT_SENS_0       (0x11C >> 2)
#define GPIO_QRST_INT_SENS_1       (0x120 >> 2)
#define GPIO_QRST_INT_SENS_2       (0x124 >> 2)
#define GPIO_QRST_INT_STATUS       (0x128 >> 2)
#define GPIO_QRST_RESET_TOLERANT   (0x12C >> 2)
#define GPIO_QRST_DEBOUNCE_1       (0x130 >> 2)
#define GPIO_QRST_DEBOUNCE_2       (0x134 >> 2)
#define GPIO_QRST_INPUT_MASK       (0x138 >> 2)
#define GPIO_UVWX_COMMAND_SRC_0    (0x140 >> 2)
#define GPIO_UVWX_COMMAND_SRC_1    (0x144 >> 2)
#define GPIO_UVWX_INT_ENABLE       (0x148 >> 2)
#define GPIO_UVWX_INT_SENS_0       (0x14C >> 2)
#define GPIO_UVWX_INT_SENS_1       (0x150 >> 2)
#define GPIO_UVWX_INT_SENS_2       (0x154 >> 2)
#define GPIO_UVWX_INT_STATUS       (0x158 >> 2)
#define GPIO_UVWX_RESET_TOLERANT   (0x15C >> 2)
#define GPIO_UVWX_DEBOUNCE_1       (0x160 >> 2)
#define GPIO_UVWX_DEBOUNCE_2       (0x164 >> 2)
#define GPIO_UVWX_INPUT_MASK       (0x168 >> 2)
#define GPIO_YZAAAB_COMMAND_SRC_0  (0x170 >> 2)
#define GPIO_YZAAAB_COMMAND_SRC_1  (0x174 >> 2)
#define GPIO_YZAAAB_INT_ENABLE     (0x178 >> 2)
#define GPIO_YZAAAB_INT_SENS_0     (0x17C >> 2)
#define GPIO_YZAAAB_INT_SENS_1     (0x180 >> 2)
#define GPIO_YZAAAB_INT_SENS_2     (0x184 >> 2)
#define GPIO_YZAAAB_INT_STATUS     (0x188 >> 2)
#define GPIO_YZAAAB_RESET_TOLERANT (0x18C >> 2)
#define GPIO_YZAAAB_DEBOUNCE_1     (0x190 >> 2)
#define GPIO_YZAAAB_DEBOUNCE_2     (0x194 >> 2)
#define GPIO_YZAAAB_INPUT_MASK     (0x198 >> 2)
#define GPIO_AC_COMMAND_SRC_0      (0x1A0 >> 2)
#define GPIO_AC_COMMAND_SRC_1      (0x1A4 >> 2)
#define GPIO_AC_INT_ENABLE         (0x1A8 >> 2)
#define GPIO_AC_INT_SENS_0         (0x1AC >> 2)
#define GPIO_AC_INT_SENS_1         (0x1B0 >> 2)
#define GPIO_AC_INT_SENS_2         (0x1B4 >> 2)
#define GPIO_AC_INT_STATUS         (0x1B8 >> 2)
#define GPIO_AC_RESET_TOLERANT     (0x1BC >> 2)
#define GPIO_AC_DEBOUNCE_1         (0x1C0 >> 2)
#define GPIO_AC_DEBOUNCE_2         (0x1C4 >> 2)
#define GPIO_AC_INPUT_MASK         (0x1C8 >> 2)
#define GPIO_ABCD_INPUT_MASK       (0x1D0 >> 2)
#define GPIO_EFGH_INPUT_MASK       (0x1D4 >> 2)
#define GPIO_YZAAAB_DATA_VALUE     (0x1E0 >> 2)
#define GPIO_YZAAAB_DIRECTION      (0x1E4 >> 2)
#define GPIO_AC_DATA_VALUE         (0x1E8 >> 2)
#define GPIO_AC_DIRECTION          (0x1EC >> 2)
#define GPIO_3_6V_MEM_SIZE         0x1F0
#define GPIO_3_6V_REG_ARRAY_SIZE   (GPIO_3_6V_MEM_SIZE >> 2)

/* AST2600 only - 1.8V gpios */
/*
 * The AST2600 has same 3.6V gpios as the AST2400 (memory offsets 0x0-0x198)
 * and additional 1.8V gpios (memory offsets 0x800-0x9D4).
 */
#define GPIO_1_8V_REG_OFFSET          0x800
#define GPIO_1_8V_ABCD_DATA_VALUE     ((0x800 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_DIRECTION      ((0x804 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_INT_ENABLE     ((0x808 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_INT_SENS_0     ((0x80C - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_INT_SENS_1     ((0x810 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_INT_SENS_2     ((0x814 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_INT_STATUS     ((0x818 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_RESET_TOLERANT ((0x81C - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_DATA_VALUE        ((0x820 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_DIRECTION         ((0x824 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_INT_ENABLE        ((0x828 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_INT_SENS_0        ((0x82C - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_INT_SENS_1        ((0x830 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_INT_SENS_2        ((0x834 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_INT_STATUS        ((0x838 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_RESET_TOLERANT    ((0x83C - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_DEBOUNCE_1     ((0x840 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_DEBOUNCE_2     ((0x844 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_DEBOUNCE_1        ((0x848 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_DEBOUNCE_2        ((0x84C - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_DEBOUNCE_TIME_1     ((0x850 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_DEBOUNCE_TIME_2     ((0x854 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_DEBOUNCE_TIME_3     ((0x858 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_COMMAND_SRC_0  ((0x860 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_COMMAND_SRC_1  ((0x864 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_COMMAND_SRC_0     ((0x868 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_COMMAND_SRC_1     ((0x86C - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_DATA_READ      ((0x8C0 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_DATA_READ         ((0x8C4 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_ABCD_INPUT_MASK     ((0x9D0 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_E_INPUT_MASK        ((0x9D4 - GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_1_8V_MEM_SIZE            0x9D8
#define GPIO_1_8V_REG_ARRAY_SIZE      ((GPIO_1_8V_MEM_SIZE - \
                                      GPIO_1_8V_REG_OFFSET) >> 2)
#define GPIO_MAX_MEM_SIZE           MAX(GPIO_3_6V_MEM_SIZE, GPIO_1_8V_MEM_SIZE)

static int aspeed_evaluate_irq(GPIOSets *regs, int gpio_prev_high, int gpio)
{
    uint32_t falling_edge = 0, rising_edge = 0;
    uint32_t int_trigger = extract32(regs->int_sens_0, gpio, 1)
                           | extract32(regs->int_sens_1, gpio, 1) << 1
                           | extract32(regs->int_sens_2, gpio, 1) << 2;
    uint32_t gpio_curr_high = extract32(regs->data_value, gpio, 1);
    uint32_t gpio_int_enabled = extract32(regs->int_enable, gpio, 1);

    if (!gpio_int_enabled) {
        return 0;
    }

    /* Detect edges */
    if (gpio_curr_high && !gpio_prev_high) {
        rising_edge = 1;
    } else if (!gpio_curr_high && gpio_prev_high) {
        falling_edge = 1;
    }

    if (((int_trigger == ASPEED_FALLING_EDGE)  && falling_edge)  ||
        ((int_trigger == ASPEED_RISING_EDGE)  && rising_edge)    ||
        ((int_trigger == ASPEED_LEVEL_LOW)  && !gpio_curr_high)  ||
        ((int_trigger == ASPEED_LEVEL_HIGH)  && gpio_curr_high)  ||
        ((int_trigger >= ASPEED_DUAL_EDGE)  && (rising_edge || falling_edge)))
    {
        regs->int_status = deposit32(regs->int_status, gpio, 1, 1);
        return 1;
    }
    return 0;
}

#define nested_struct_index(ta, pa, m, tb, pb) \
        (pb - ((tb *)(((char *)pa) + offsetof(ta, m))))

static ptrdiff_t aspeed_gpio_set_idx(AspeedGPIOState *s, GPIOSets *regs)
{
    return nested_struct_index(AspeedGPIOState, s, sets, GPIOSets, regs);
}

static void aspeed_gpio_update(AspeedGPIOState *s, GPIOSets *regs,
                               uint32_t value)
{
    uint32_t input_mask = regs->input_mask;
    uint32_t direction = regs->direction;
    uint32_t old = regs->data_value;
    uint32_t new = value;
    uint32_t diff;
    int gpio;

    diff = old ^ new;
    if (diff) {
        for (gpio = 0; gpio < GPIOS_PER_REG; gpio++) {
            uint32_t mask = 1 << gpio;

            /* If the gpio needs to be updated... */
            if (!(diff & mask)) {
                continue;
            }

            /* ...and we're output or not input-masked... */
            if (!(direction & mask) && (input_mask & mask)) {
                continue;
            }

            /* ...then update the state. */
            if (mask & new) {
                regs->data_value |= mask;
            } else {
                regs->data_value &= ~mask;
            }

            /* If the gpio is set to output... */
            if (direction & mask) {
                /* ...trigger the line-state IRQ */
                ptrdiff_t set = aspeed_gpio_set_idx(s, regs);
                size_t offset = set * GPIOS_PER_SET + gpio;
                qemu_set_irq(s->gpios[offset], !!(new & mask));
            } else {
                /* ...otherwise if we meet the line's current IRQ policy... */
                if (aspeed_evaluate_irq(regs, old & mask, gpio)) {
                    /* ...trigger the VIC IRQ */
                    s->pending++;
                }
            }
        }
    }
    qemu_set_irq(s->irq, !!(s->pending));
}

static uint32_t aspeed_adjust_pin(AspeedGPIOState *s, uint32_t pin)
{
    AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s);
    /*
     * The 2500 has a 4 pin gap in group AB and the 2400 has a 4 pin
     * gap in group Y (and only four pins in AB but this is the last group so
     * it doesn't matter).
     */
    if (agc->gap && pin >= agc->gap) {
        pin += GPIO_PIN_GAP_SIZE;
    }

    return pin;
}

static bool aspeed_gpio_get_pin_level(AspeedGPIOState *s, uint32_t set_idx,
                                      uint32_t pin)
{
    uint32_t reg_val;
    uint32_t pin_mask = 1 << pin;

    reg_val = s->sets[set_idx].data_value;

    return !!(reg_val & pin_mask);
}

static void aspeed_gpio_set_pin_level(AspeedGPIOState *s, uint32_t set_idx,
                                      uint32_t pin, bool level)
{
    uint32_t value = s->sets[set_idx].data_value;
    uint32_t pin_mask = 1 << pin;

    if (level) {
        value |= pin_mask;
    } else {
        value &= !pin_mask;
    }

    aspeed_gpio_update(s, &s->sets[set_idx], value);
}

/*
 *  | src_1 | src_2 |  source     |
 *  |-----------------------------|
 *  |   0   |   0   |  ARM        |
 *  |   0   |   1   |  LPC        |
 *  |   1   |   0   |  Coprocessor|
 *  |   1   |   1   |  Reserved   |
 *
 *  Once the source of a set is programmed, corresponding bits in the
 *  data_value, direction, interrupt [enable, sens[0-2]], reset_tol and
 *  debounce registers can only be written by the source.
 *
 *  Source is ARM by default
 *  only bits 24, 16, 8, and 0 can be set
 *
 *  we don't currently have a model for the LPC or Coprocessor
 */
static uint32_t update_value_control_source(GPIOSets *regs, uint32_t old_value,
                                            uint32_t value)
{
    int i;
    int cmd_source;

    /* assume the source is always ARM for now */
    int source = ASPEED_SOURCE_ARM;

    uint32_t new_value = 0;

    /* for each group in set */
    for (i = 0; i < GPIOS_PER_REG; i += GPIOS_PER_GROUP) {
        cmd_source = extract32(regs->cmd_source_0, i, 1)
                | (extract32(regs->cmd_source_1, i, 1) << 1);

        if (source == cmd_source) {
            new_value |= (0xff << i) & value;
        } else {
            new_value |= (0xff << i) & old_value;
        }
    }
    return new_value;
}

static const AspeedGPIOReg aspeed_3_6v_gpios[GPIO_3_6V_REG_ARRAY_SIZE] = {
    /* Set ABCD */
    [GPIO_ABCD_DATA_VALUE] =     { 0, gpio_reg_data_value },
    [GPIO_ABCD_DIRECTION] =      { 0, gpio_reg_direction },
    [GPIO_ABCD_INT_ENABLE] =     { 0, gpio_reg_int_enable },
    [GPIO_ABCD_INT_SENS_0] =     { 0, gpio_reg_int_sens_0 },
    [GPIO_ABCD_INT_SENS_1] =     { 0, gpio_reg_int_sens_1 },
    [GPIO_ABCD_INT_SENS_2] =     { 0, gpio_reg_int_sens_2 },
    [GPIO_ABCD_INT_STATUS] =     { 0, gpio_reg_int_status },
    [GPIO_ABCD_RESET_TOLERANT] = { 0, gpio_reg_reset_tolerant },
    [GPIO_ABCD_DEBOUNCE_1] =     { 0, gpio_reg_debounce_1 },
    [GPIO_ABCD_DEBOUNCE_2] =     { 0, gpio_reg_debounce_2 },
    [GPIO_ABCD_COMMAND_SRC_0] =  { 0, gpio_reg_cmd_source_0 },
    [GPIO_ABCD_COMMAND_SRC_1] =  { 0, gpio_reg_cmd_source_1 },
    [GPIO_ABCD_DATA_READ] =      { 0, gpio_reg_data_read },
    [GPIO_ABCD_INPUT_MASK] =     { 0, gpio_reg_input_mask },
    /* Set EFGH */
    [GPIO_EFGH_DATA_VALUE] =     { 1, gpio_reg_data_value },
    [GPIO_EFGH_DIRECTION] =      { 1, gpio_reg_direction },
    [GPIO_EFGH_INT_ENABLE] =     { 1, gpio_reg_int_enable },
    [GPIO_EFGH_INT_SENS_0] =     { 1, gpio_reg_int_sens_0 },
    [GPIO_EFGH_INT_SENS_1] =     { 1, gpio_reg_int_sens_1 },
    [GPIO_EFGH_INT_SENS_2] =     { 1, gpio_reg_int_sens_2 },
    [GPIO_EFGH_INT_STATUS] =     { 1, gpio_reg_int_status },
    [GPIO_EFGH_RESET_TOLERANT] = { 1, gpio_reg_reset_tolerant },
    [GPIO_EFGH_DEBOUNCE_1] =     { 1, gpio_reg_debounce_1 },
    [GPIO_EFGH_DEBOUNCE_2] =     { 1, gpio_reg_debounce_2 },
    [GPIO_EFGH_COMMAND_SRC_0] =  { 1, gpio_reg_cmd_source_0 },
    [GPIO_EFGH_COMMAND_SRC_1] =  { 1, gpio_reg_cmd_source_1 },
    [GPIO_EFGH_DATA_READ] =      { 1, gpio_reg_data_read },
    [GPIO_EFGH_INPUT_MASK] =     { 1, gpio_reg_input_mask },
    /* Set IJKL */
    [GPIO_IJKL_DATA_VALUE] =     { 2, gpio_reg_data_value },
    [GPIO_IJKL_DIRECTION] =      { 2, gpio_reg_direction },
    [GPIO_IJKL_INT_ENABLE] =     { 2, gpio_reg_int_enable },
    [GPIO_IJKL_INT_SENS_0] =     { 2, gpio_reg_int_sens_0 },
    [GPIO_IJKL_INT_SENS_1] =     { 2, gpio_reg_int_sens_1 },
    [GPIO_IJKL_INT_SENS_2] =     { 2, gpio_reg_int_sens_2 },
    [GPIO_IJKL_INT_STATUS] =     { 2, gpio_reg_int_status },
    [GPIO_IJKL_RESET_TOLERANT] = { 2, gpio_reg_reset_tolerant },
    [GPIO_IJKL_DEBOUNCE_1] =     { 2, gpio_reg_debounce_1 },
    [GPIO_IJKL_DEBOUNCE_2] =     { 2, gpio_reg_debounce_2 },
    [GPIO_IJKL_COMMAND_SRC_0] =  { 2, gpio_reg_cmd_source_0 },
    [GPIO_IJKL_COMMAND_SRC_1] =  { 2, gpio_reg_cmd_source_1 },
    [GPIO_IJKL_DATA_READ] =      { 2, gpio_reg_data_read },
    [GPIO_IJKL_INPUT_MASK] =     { 2, gpio_reg_input_mask },
    /* Set MNOP */
    [GPIO_MNOP_DATA_VALUE] =     { 3, gpio_reg_data_value },
    [GPIO_MNOP_DIRECTION] =      { 3, gpio_reg_direction },
    [GPIO_MNOP_INT_ENABLE] =     { 3, gpio_reg_int_enable },
    [GPIO_MNOP_INT_SENS_0] =     { 3, gpio_reg_int_sens_0 },
    [GPIO_MNOP_INT_SENS_1] =     { 3, gpio_reg_int_sens_1 },
    [GPIO_MNOP_INT_SENS_2] =     { 3, gpio_reg_int_sens_2 },
    [GPIO_MNOP_INT_STATUS] =     { 3, gpio_reg_int_status },
    [GPIO_MNOP_RESET_TOLERANT] = { 3, gpio_reg_reset_tolerant },
    [GPIO_MNOP_DEBOUNCE_1] =     { 3, gpio_reg_debounce_1 },
    [GPIO_MNOP_DEBOUNCE_2] =     { 3, gpio_reg_debounce_2 },
    [GPIO_MNOP_COMMAND_SRC_0] =  { 3, gpio_reg_cmd_source_0 },
    [GPIO_MNOP_COMMAND_SRC_1] =  { 3, gpio_reg_cmd_source_1 },
    [GPIO_MNOP_DATA_READ] =      { 3, gpio_reg_data_read },
    [GPIO_MNOP_INPUT_MASK] =     { 3, gpio_reg_input_mask },
    /* Set QRST */
    [GPIO_QRST_DATA_VALUE] =     { 4, gpio_reg_data_value },
    [GPIO_QRST_DIRECTION] =      { 4, gpio_reg_direction },
    [GPIO_QRST_INT_ENABLE] =     { 4, gpio_reg_int_enable },
    [GPIO_QRST_INT_SENS_0] =     { 4, gpio_reg_int_sens_0 },
    [GPIO_QRST_INT_SENS_1] =     { 4, gpio_reg_int_sens_1 },
    [GPIO_QRST_INT_SENS_2] =     { 4, gpio_reg_int_sens_2 },
    [GPIO_QRST_INT_STATUS] =     { 4, gpio_reg_int_status },
    [GPIO_QRST_RESET_TOLERANT] = { 4, gpio_reg_reset_tolerant },
    [GPIO_QRST_DEBOUNCE_1] =     { 4, gpio_reg_debounce_1 },
    [GPIO_QRST_DEBOUNCE_2] =     { 4, gpio_reg_debounce_2 },
    [GPIO_QRST_COMMAND_SRC_0] =  { 4, gpio_reg_cmd_source_0 },
    [GPIO_QRST_COMMAND_SRC_1] =  { 4, gpio_reg_cmd_source_1 },
    [GPIO_QRST_DATA_READ] =      { 4, gpio_reg_data_read },
    [GPIO_QRST_INPUT_MASK] =     { 4, gpio_reg_input_mask },
    /* Set UVWX */
    [GPIO_UVWX_DATA_VALUE] =     { 5, gpio_reg_data_value },
    [GPIO_UVWX_DIRECTION] =      { 5, gpio_reg_direction },
    [GPIO_UVWX_INT_ENABLE] =     { 5, gpio_reg_int_enable },
    [GPIO_UVWX_INT_SENS_0] =     { 5, gpio_reg_int_sens_0 },
    [GPIO_UVWX_INT_SENS_1] =     { 5, gpio_reg_int_sens_1 },
    [GPIO_UVWX_INT_SENS_2] =     { 5, gpio_reg_int_sens_2 },
    [GPIO_UVWX_INT_STATUS] =     { 5, gpio_reg_int_status },
    [GPIO_UVWX_RESET_TOLERANT] = { 5, gpio_reg_reset_tolerant },
    [GPIO_UVWX_DEBOUNCE_1] =     { 5, gpio_reg_debounce_1 },
    [GPIO_UVWX_DEBOUNCE_2] =     { 5, gpio_reg_debounce_2 },
    [GPIO_UVWX_COMMAND_SRC_0] =  { 5, gpio_reg_cmd_source_0 },
    [GPIO_UVWX_COMMAND_SRC_1] =  { 5, gpio_reg_cmd_source_1 },
    [GPIO_UVWX_DATA_READ] =      { 5, gpio_reg_data_read },
    [GPIO_UVWX_INPUT_MASK] =     { 5, gpio_reg_input_mask },
    /* Set YZAAAB */
    [GPIO_YZAAAB_DATA_VALUE] =     { 6, gpio_reg_data_value },
    [GPIO_YZAAAB_DIRECTION] =      { 6, gpio_reg_direction },
    [GPIO_YZAAAB_INT_ENABLE] =     { 6, gpio_reg_int_enable },
    [GPIO_YZAAAB_INT_SENS_0] =     { 6, gpio_reg_int_sens_0 },
    [GPIO_YZAAAB_INT_SENS_1] =     { 6, gpio_reg_int_sens_1 },
    [GPIO_YZAAAB_INT_SENS_2] =     { 6, gpio_reg_int_sens_2 },
    [GPIO_YZAAAB_INT_STATUS] =     { 6, gpio_reg_int_status },
    [GPIO_YZAAAB_RESET_TOLERANT] = { 6, gpio_reg_reset_tolerant },
    [GPIO_YZAAAB_DEBOUNCE_1] =     { 6, gpio_reg_debounce_1 },
    [GPIO_YZAAAB_DEBOUNCE_2] =     { 6, gpio_reg_debounce_2 },
    [GPIO_YZAAAB_COMMAND_SRC_0] =  { 6, gpio_reg_cmd_source_0 },
    [GPIO_YZAAAB_COMMAND_SRC_1] =  { 6, gpio_reg_cmd_source_1 },
    [GPIO_YZAAAB_DATA_READ] =      { 6, gpio_reg_data_read },
    [GPIO_YZAAAB_INPUT_MASK] =     { 6, gpio_reg_input_mask },
    /* Set AC  (ast2500 only) */
    [GPIO_AC_DATA_VALUE] =         { 7, gpio_reg_data_value },
    [GPIO_AC_DIRECTION] =          { 7, gpio_reg_direction },
    [GPIO_AC_INT_ENABLE] =         { 7, gpio_reg_int_enable },
    [GPIO_AC_INT_SENS_0] =         { 7, gpio_reg_int_sens_0 },
    [GPIO_AC_INT_SENS_1] =         { 7, gpio_reg_int_sens_1 },
    [GPIO_AC_INT_SENS_2] =         { 7, gpio_reg_int_sens_2 },
    [GPIO_AC_INT_STATUS] =         { 7, gpio_reg_int_status },
    [GPIO_AC_RESET_TOLERANT] =     { 7, gpio_reg_reset_tolerant },
    [GPIO_AC_DEBOUNCE_1] =         { 7, gpio_reg_debounce_1 },
    [GPIO_AC_DEBOUNCE_2] =         { 7, gpio_reg_debounce_2 },
    [GPIO_AC_COMMAND_SRC_0] =      { 7, gpio_reg_cmd_source_0 },
    [GPIO_AC_COMMAND_SRC_1] =      { 7, gpio_reg_cmd_source_1 },
    [GPIO_AC_DATA_READ] =          { 7, gpio_reg_data_read },
    [GPIO_AC_INPUT_MASK] =         { 7, gpio_reg_input_mask },
};

static const AspeedGPIOReg aspeed_1_8v_gpios[GPIO_1_8V_REG_ARRAY_SIZE] = {
    /* 1.8V Set ABCD */
    [GPIO_1_8V_ABCD_DATA_VALUE] =     {0, gpio_reg_data_value},
    [GPIO_1_8V_ABCD_DIRECTION] =      {0, gpio_reg_direction},
    [GPIO_1_8V_ABCD_INT_ENABLE] =     {0, gpio_reg_int_enable},
    [GPIO_1_8V_ABCD_INT_SENS_0] =     {0, gpio_reg_int_sens_0},
    [GPIO_1_8V_ABCD_INT_SENS_1] =     {0, gpio_reg_int_sens_1},
    [GPIO_1_8V_ABCD_INT_SENS_2] =     {0, gpio_reg_int_sens_2},
    [GPIO_1_8V_ABCD_INT_STATUS] =     {0, gpio_reg_int_status},
    [GPIO_1_8V_ABCD_RESET_TOLERANT] = {0, gpio_reg_reset_tolerant},
    [GPIO_1_8V_ABCD_DEBOUNCE_1] =     {0, gpio_reg_debounce_1},
    [GPIO_1_8V_ABCD_DEBOUNCE_2] =     {0, gpio_reg_debounce_2},
    [GPIO_1_8V_ABCD_COMMAND_SRC_0] =  {0, gpio_reg_cmd_source_0},
    [GPIO_1_8V_ABCD_COMMAND_SRC_1] =  {0, gpio_reg_cmd_source_1},
    [GPIO_1_8V_ABCD_DATA_READ] =      {0, gpio_reg_data_read},
    [GPIO_1_8V_ABCD_INPUT_MASK] =     {0, gpio_reg_input_mask},
    /* 1.8V Set E */
    [GPIO_1_8V_E_DATA_VALUE] =     {1, gpio_reg_data_value},
    [GPIO_1_8V_E_DIRECTION] =      {1, gpio_reg_direction},
    [GPIO_1_8V_E_INT_ENABLE] =     {1, gpio_reg_int_enable},
    [GPIO_1_8V_E_INT_SENS_0] =     {1, gpio_reg_int_sens_0},
    [GPIO_1_8V_E_INT_SENS_1] =     {1, gpio_reg_int_sens_1},
    [GPIO_1_8V_E_INT_SENS_2] =     {1, gpio_reg_int_sens_2},
    [GPIO_1_8V_E_INT_STATUS] =     {1, gpio_reg_int_status},
    [GPIO_1_8V_E_RESET_TOLERANT] = {1, gpio_reg_reset_tolerant},
    [GPIO_1_8V_E_DEBOUNCE_1] =     {1, gpio_reg_debounce_1},
    [GPIO_1_8V_E_DEBOUNCE_2] =     {1, gpio_reg_debounce_2},
    [GPIO_1_8V_E_COMMAND_SRC_0] =  {1, gpio_reg_cmd_source_0},
    [GPIO_1_8V_E_COMMAND_SRC_1] =  {1, gpio_reg_cmd_source_1},
    [GPIO_1_8V_E_DATA_READ] =      {1, gpio_reg_data_read},
    [GPIO_1_8V_E_INPUT_MASK] =     {1, gpio_reg_input_mask},
};

static uint64_t aspeed_gpio_read(void *opaque, hwaddr offset, uint32_t size)
{
    AspeedGPIOState *s = ASPEED_GPIO(opaque);
    AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s);
    uint64_t idx = -1;
    const AspeedGPIOReg *reg;
    GPIOSets *set;

    idx = offset >> 2;
    if (idx >= GPIO_DEBOUNCE_TIME_1 && idx <= GPIO_DEBOUNCE_TIME_3) {
        idx -= GPIO_DEBOUNCE_TIME_1;
        return (uint64_t) s->debounce_regs[idx];
    }

    reg = &agc->reg_table[idx];
    if (reg->set_idx >= agc->nr_gpio_sets) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: no getter for offset 0x%"
                      HWADDR_PRIx"\n", __func__, offset);
        return 0;
    }

    set = &s->sets[reg->set_idx];
    switch (reg->type) {
    case gpio_reg_data_value:
        return set->data_value;
    case gpio_reg_direction:
        return set->direction;
    case gpio_reg_int_enable:
        return set->int_enable;
    case gpio_reg_int_sens_0:
        return set->int_sens_0;
    case gpio_reg_int_sens_1:
        return set->int_sens_1;
    case gpio_reg_int_sens_2:
        return set->int_sens_2;
    case gpio_reg_int_status:
        return set->int_status;
    case gpio_reg_reset_tolerant:
        return set->reset_tol;
    case gpio_reg_debounce_1:
        return set->debounce_1;
    case gpio_reg_debounce_2:
        return set->debounce_2;
    case gpio_reg_cmd_source_0:
        return set->cmd_source_0;
    case gpio_reg_cmd_source_1:
        return set->cmd_source_1;
    case gpio_reg_data_read:
        return set->data_read;
    case gpio_reg_input_mask:
        return set->input_mask;
    default:
        qemu_log_mask(LOG_GUEST_ERROR, "%s: no getter for offset 0x%"
                      HWADDR_PRIx"\n", __func__, offset);
        return 0;
    };
}

static void aspeed_gpio_write(void *opaque, hwaddr offset, uint64_t data,
                              uint32_t size)
{
    AspeedGPIOState *s = ASPEED_GPIO(opaque);
    AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s);
    const GPIOSetProperties *props;
    uint64_t idx = -1;
    const AspeedGPIOReg *reg;
    GPIOSets *set;
    uint32_t cleared;

    idx = offset >> 2;
    if (idx >= GPIO_DEBOUNCE_TIME_1 && idx <= GPIO_DEBOUNCE_TIME_3) {
        idx -= GPIO_DEBOUNCE_TIME_1;
        s->debounce_regs[idx] = (uint32_t) data;
        return;
    }

    reg = &agc->reg_table[idx];
    if (reg->set_idx >= agc->nr_gpio_sets) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: no setter for offset 0x%"
                      HWADDR_PRIx"\n", __func__, offset);
        return;
    }

    set = &s->sets[reg->set_idx];
    props = &agc->props[reg->set_idx];

    switch (reg->type) {
    case gpio_reg_data_value:
        data &= props->output;
        data = update_value_control_source(set, set->data_value, data);
        set->data_read = data;
        aspeed_gpio_update(s, set, data);
        return;
    case gpio_reg_direction:
        /*
         *   where data is the value attempted to be written to the pin:
         *    pin type      | input mask | output mask | expected value
         *    ------------------------------------------------------------
         *   bidirectional  |   1       |   1        |  data
         *   input only     |   1       |   0        |   0
         *   output only    |   0       |   1        |   1
         *   no pin / gap   |   0       |   0        |   0
         *
         *  which is captured by:
         *  data = ( data | ~input) & output;
         */
        data = (data | ~props->input) & props->output;
        set->direction = update_value_control_source(set, set->direction, data);
        break;
    case gpio_reg_int_enable:
        set->int_enable = update_value_control_source(set, set->int_enable,
                                                      data);
        break;
    case gpio_reg_int_sens_0:
        set->int_sens_0 = update_value_control_source(set, set->int_sens_0,
                                                      data);
        break;
    case gpio_reg_int_sens_1:
        set->int_sens_1 = update_value_control_source(set, set->int_sens_1,
                                                      data);
        break;
    case gpio_reg_int_sens_2:
        set->int_sens_2 = update_value_control_source(set, set->int_sens_2,
                                                      data);
        break;
    case gpio_reg_int_status:
        cleared = ctpop32(data & set->int_status);
        if (s->pending && cleared) {
            assert(s->pending >= cleared);
            s->pending -= cleared;
        }
        set->int_status &= ~data;
        break;
    case gpio_reg_reset_tolerant:
        set->reset_tol = update_value_control_source(set, set->reset_tol,
                                                     data);
        return;
    case gpio_reg_debounce_1:
        set->debounce_1 = update_value_control_source(set, set->debounce_1,
                                                      data);
        return;
    case gpio_reg_debounce_2:
        set->debounce_2 = update_value_control_source(set, set->debounce_2,
                                                      data);
        return;
    case gpio_reg_cmd_source_0:
        set->cmd_source_0 = data & ASPEED_CMD_SRC_MASK;
        return;
    case gpio_reg_cmd_source_1:
        set->cmd_source_1 = data & ASPEED_CMD_SRC_MASK;
        return;
    case gpio_reg_data_read:
        /* Read only register */
        return;
    case gpio_reg_input_mask:
        /*
         * feeds into interrupt generation
         * 0: read from data value reg will be updated
         * 1: read from data value reg will not be updated
         */
         set->input_mask = data & props->input;
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR, "%s: no setter for offset 0x%"
                      HWADDR_PRIx"\n", __func__, offset);
        return;
    }
    aspeed_gpio_update(s, set, set->data_value);
    return;
}

static int get_set_idx(AspeedGPIOState *s, const char *group, int *group_idx)
{
    AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s);
    int set_idx, g_idx;

    for (set_idx = 0; set_idx < agc->nr_gpio_sets; set_idx++) {
        const GPIOSetProperties *set_props = &agc->props[set_idx];
        for (g_idx = 0; g_idx < ASPEED_GROUPS_PER_SET; g_idx++) {
            if (!strncmp(group, set_props->group_label[g_idx], strlen(group))) {
                *group_idx = g_idx;
                return set_idx;
            }
        }
    }
    return -1;
}

static void aspeed_gpio_get_pin(Object *obj, Visitor *v, const char *name,
                                void *opaque, Error **errp)
{
    int pin = 0xfff;
    bool level = true;
    char group[4];
    AspeedGPIOState *s = ASPEED_GPIO(obj);
    int set_idx, group_idx = 0;

    if (sscanf(name, "gpio%2[A-Z]%1d", group, &pin) != 2) {
        /* 1.8V gpio */
        if (sscanf(name, "gpio%3[18A-E]%1d", group, &pin) != 2) {
            error_setg(errp, "%s: error reading %s", __func__, name);
            return;
        }
    }
    set_idx = get_set_idx(s, group, &group_idx);
    if (set_idx == -1) {
        error_setg(errp, "%s: invalid group %s", __func__, group);
        return;
    }
    pin =  pin + group_idx * GPIOS_PER_GROUP;
    level = aspeed_gpio_get_pin_level(s, set_idx, pin);
    visit_type_bool(v, name, &level, errp);
}

static void aspeed_gpio_set_pin(Object *obj, Visitor *v, const char *name,
                               void *opaque, Error **errp)
{
    bool level;
    int pin = 0xfff;
    char group[4];
    AspeedGPIOState *s = ASPEED_GPIO(obj);
    int set_idx, group_idx = 0;

    if (!visit_type_bool(v, name, &level, errp)) {
        return;
    }
    if (sscanf(name, "gpio%2[A-Z]%1d", group, &pin) != 2) {
        /* 1.8V gpio */
        if (sscanf(name, "gpio%3[18A-E]%1d", group, &pin) != 2) {
            error_setg(errp, "%s: error reading %s", __func__, name);
            return;
        }
    }
    set_idx = get_set_idx(s, group, &group_idx);
    if (set_idx == -1) {
        error_setg(errp, "%s: invalid group %s", __func__, group);
        return;
    }
    pin =  pin + group_idx * GPIOS_PER_GROUP;
    aspeed_gpio_set_pin_level(s, set_idx, pin, level);
}

/****************** Setup functions ******************/
static const GPIOSetProperties ast2400_set_props[] = {
    [0] = {0xffffffff,  0xffffffff,  {"A", "B", "C", "D"} },
    [1] = {0xffffffff,  0xffffffff,  {"E", "F", "G", "H"} },
    [2] = {0xffffffff,  0xffffffff,  {"I", "J", "K", "L"} },
    [3] = {0xffffffff,  0xffffffff,  {"M", "N", "O", "P"} },
    [4] = {0xffffffff,  0xffffffff,  {"Q", "R", "S", "T"} },
    [5] = {0xffffffff,  0x0000ffff,  {"U", "V", "W", "X"} },
    [6] = {0x0000000f,  0x0fffff0f,  {"Y", "Z", "AA", "AB"} },
};

static const GPIOSetProperties ast2500_set_props[] = {
    [0] = {0xffffffff,  0xffffffff,  {"A", "B", "C", "D"} },
    [1] = {0xffffffff,  0xffffffff,  {"E", "F", "G", "H"} },
    [2] = {0xffffffff,  0xffffffff,  {"I", "J", "K", "L"} },
    [3] = {0xffffffff,  0xffffffff,  {"M", "N", "O", "P"} },
    [4] = {0xffffffff,  0xffffffff,  {"Q", "R", "S", "T"} },
    [5] = {0xffffffff,  0x0000ffff,  {"U", "V", "W", "X"} },
    [6] = {0xffffff0f,  0x0fffff0f,  {"Y", "Z", "AA", "AB"} },
    [7] = {0x000000ff,  0x000000ff,  {"AC"} },
};

static GPIOSetProperties ast2600_3_6v_set_props[] = {
    [0] = {0xffffffff,  0xffffffff,  {"A", "B", "C", "D"} },
    [1] = {0xffffffff,  0xffffffff,  {"E", "F", "G", "H"} },
    [2] = {0xffffffff,  0xffffffff,  {"I", "J", "K", "L"} },
    [3] = {0xffffffff,  0xffffffff,  {"M", "N", "O", "P"} },
    [4] = {0xffffffff,  0xffffffff,  {"Q", "R", "S", "T"} },
    [5] = {0xffffffff,  0x0000ffff,  {"U", "V", "W", "X"} },
    [6] = {0xffff0000,  0x0fff0000,  {"Y", "Z", "", ""} },
};

static GPIOSetProperties ast2600_1_8v_set_props[] = {
    [0] = {0xffffffff,  0xffffffff,  {"18A", "18B", "18C", "18D"} },
    [1] = {0x0000000f,  0x0000000f,  {"18E"} },
};

static const MemoryRegionOps aspeed_gpio_ops = {
    .read       = aspeed_gpio_read,
    .write      = aspeed_gpio_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
    .valid.min_access_size = 4,
    .valid.max_access_size = 4,
};

static void aspeed_gpio_reset(DeviceState *dev)
{
    AspeedGPIOState *s = ASPEED_GPIO(dev);

    /* TODO: respect the reset tolerance registers */
    memset(s->sets, 0, sizeof(s->sets));
}

static void aspeed_gpio_realize(DeviceState *dev, Error **errp)
{
    AspeedGPIOState *s = ASPEED_GPIO(dev);
    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
    AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s);
    int pin;

    /* Interrupt parent line */
    sysbus_init_irq(sbd, &s->irq);

    /* Individual GPIOs */
    for (pin = 0; pin < agc->nr_gpio_pins; pin++) {
        sysbus_init_irq(sbd, &s->gpios[pin]);
    }

    memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_gpio_ops, s,
            TYPE_ASPEED_GPIO, GPIO_MAX_MEM_SIZE);

    sysbus_init_mmio(sbd, &s->iomem);
}

static void aspeed_gpio_init(Object *obj)
{
    AspeedGPIOState *s = ASPEED_GPIO(obj);
    AspeedGPIOClass *agc = ASPEED_GPIO_GET_CLASS(s);
    int pin;

    for (pin = 0; pin < agc->nr_gpio_pins; pin++) {
        char *name;
        int set_idx = pin / GPIOS_PER_SET;
        int pin_idx = aspeed_adjust_pin(s, pin) - (set_idx * GPIOS_PER_SET);
        int group_idx = pin_idx >> GPIO_GROUP_SHIFT;
        const GPIOSetProperties *props = &agc->props[set_idx];

        name = g_strdup_printf("gpio%s%d", props->group_label[group_idx],
                               pin_idx % GPIOS_PER_GROUP);
        object_property_add(obj, name, "bool", aspeed_gpio_get_pin,
                            aspeed_gpio_set_pin, NULL, NULL);
        g_free(name);
    }
}

static const VMStateDescription vmstate_gpio_regs = {
    .name = TYPE_ASPEED_GPIO"/regs",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(data_value,   GPIOSets),
        VMSTATE_UINT32(data_read,    GPIOSets),
        VMSTATE_UINT32(direction,    GPIOSets),
        VMSTATE_UINT32(int_enable,   GPIOSets),
        VMSTATE_UINT32(int_sens_0,   GPIOSets),
        VMSTATE_UINT32(int_sens_1,   GPIOSets),
        VMSTATE_UINT32(int_sens_2,   GPIOSets),
        VMSTATE_UINT32(int_status,   GPIOSets),
        VMSTATE_UINT32(reset_tol,    GPIOSets),
        VMSTATE_UINT32(cmd_source_0, GPIOSets),
        VMSTATE_UINT32(cmd_source_1, GPIOSets),
        VMSTATE_UINT32(debounce_1,   GPIOSets),
        VMSTATE_UINT32(debounce_2,   GPIOSets),
        VMSTATE_UINT32(input_mask,   GPIOSets),
        VMSTATE_END_OF_LIST(),
    }
};

static const VMStateDescription vmstate_aspeed_gpio = {
    .name = TYPE_ASPEED_GPIO,
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_STRUCT_ARRAY(sets, AspeedGPIOState, ASPEED_GPIO_MAX_NR_SETS,
                             1, vmstate_gpio_regs, GPIOSets),
        VMSTATE_UINT32_ARRAY(debounce_regs, AspeedGPIOState,
                             ASPEED_GPIO_NR_DEBOUNCE_REGS),
        VMSTATE_END_OF_LIST(),
   }
};

static void aspeed_gpio_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->realize = aspeed_gpio_realize;
    dc->reset = aspeed_gpio_reset;
    dc->desc = "Aspeed GPIO Controller";
    dc->vmsd = &vmstate_aspeed_gpio;
}

static void aspeed_gpio_ast2400_class_init(ObjectClass *klass, void *data)
{
    AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);

    agc->props = ast2400_set_props;
    agc->nr_gpio_pins = 216;
    agc->nr_gpio_sets = 7;
    agc->gap = 196;
    agc->reg_table = aspeed_3_6v_gpios;
}

static void aspeed_gpio_2500_class_init(ObjectClass *klass, void *data)
{
    AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);

    agc->props = ast2500_set_props;
    agc->nr_gpio_pins = 228;
    agc->nr_gpio_sets = 8;
    agc->gap = 220;
    agc->reg_table = aspeed_3_6v_gpios;
}

static void aspeed_gpio_ast2600_3_6v_class_init(ObjectClass *klass, void *data)
{
    AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);

    agc->props = ast2600_3_6v_set_props;
    agc->nr_gpio_pins = 208;
    agc->nr_gpio_sets = 7;
    agc->reg_table = aspeed_3_6v_gpios;
}

static void aspeed_gpio_ast2600_1_8v_class_init(ObjectClass *klass, void *data)
{
    AspeedGPIOClass *agc = ASPEED_GPIO_CLASS(klass);

    agc->props = ast2600_1_8v_set_props;
    agc->nr_gpio_pins = 36;
    agc->nr_gpio_sets = 2;
    agc->reg_table = aspeed_1_8v_gpios;
}

static const TypeInfo aspeed_gpio_info = {
    .name           = TYPE_ASPEED_GPIO,
    .parent         = TYPE_SYS_BUS_DEVICE,
    .instance_size  = sizeof(AspeedGPIOState),
    .class_size     = sizeof(AspeedGPIOClass),
    .class_init     = aspeed_gpio_class_init,
    .abstract       = true,
};

static const TypeInfo aspeed_gpio_ast2400_info = {
    .name           = TYPE_ASPEED_GPIO "-ast2400",
    .parent         = TYPE_ASPEED_GPIO,
    .class_init     = aspeed_gpio_ast2400_class_init,
    .instance_init  = aspeed_gpio_init,
};

static const TypeInfo aspeed_gpio_ast2500_info = {
    .name           = TYPE_ASPEED_GPIO "-ast2500",
    .parent         = TYPE_ASPEED_GPIO,
    .class_init     = aspeed_gpio_2500_class_init,
    .instance_init  = aspeed_gpio_init,
};

static const TypeInfo aspeed_gpio_ast2600_3_6v_info = {
    .name           = TYPE_ASPEED_GPIO "-ast2600",
    .parent         = TYPE_ASPEED_GPIO,
    .class_init     = aspeed_gpio_ast2600_3_6v_class_init,
    .instance_init  = aspeed_gpio_init,
};

static const TypeInfo aspeed_gpio_ast2600_1_8v_info = {
    .name           = TYPE_ASPEED_GPIO "-ast2600-1_8v",
    .parent         = TYPE_ASPEED_GPIO,
    .class_init     = aspeed_gpio_ast2600_1_8v_class_init,
    .instance_init  = aspeed_gpio_init,
};

static void aspeed_gpio_register_types(void)
{
    type_register_static(&aspeed_gpio_info);
    type_register_static(&aspeed_gpio_ast2400_info);
    type_register_static(&aspeed_gpio_ast2500_info);
    type_register_static(&aspeed_gpio_ast2600_3_6v_info);
    type_register_static(&aspeed_gpio_ast2600_1_8v_info);
}

type_init(aspeed_gpio_register_types);