forked from analogdevicesinc/linux
-
Notifications
You must be signed in to change notification settings - Fork 3
/
sm501.c
1773 lines (1408 loc) · 41 KB
/
sm501.c
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
/* linux/drivers/mfd/sm501.c
*
* Copyright (C) 2006 Simtec Electronics
* Ben Dooks <[email protected]>
* Vincent Sanders <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* SM501 MFD driver
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/i2c-gpio.h>
#include <linux/slab.h>
#include <linux/sm501.h>
#include <linux/sm501-regs.h>
#include <linux/serial_8250.h>
#include <linux/io.h>
struct sm501_device {
struct list_head list;
struct platform_device pdev;
};
struct sm501_gpio;
#ifdef CONFIG_MFD_SM501_GPIO
#include <linux/gpio.h>
struct sm501_gpio_chip {
struct gpio_chip gpio;
struct sm501_gpio *ourgpio; /* to get back to parent. */
void __iomem *regbase;
void __iomem *control; /* address of control reg. */
};
struct sm501_gpio {
struct sm501_gpio_chip low;
struct sm501_gpio_chip high;
spinlock_t lock;
unsigned int registered : 1;
void __iomem *regs;
struct resource *regs_res;
};
#else
struct sm501_gpio {
/* no gpio support, empty definition for sm501_devdata. */
};
#endif
struct sm501_devdata {
spinlock_t reg_lock;
struct mutex clock_lock;
struct list_head devices;
struct sm501_gpio gpio;
struct device *dev;
struct resource *io_res;
struct resource *mem_res;
struct resource *regs_claim;
struct sm501_platdata *platdata;
unsigned int in_suspend;
unsigned long pm_misc;
int unit_power[20];
unsigned int pdev_id;
unsigned int irq;
void __iomem *regs;
unsigned int rev;
};
#define MHZ (1000 * 1000)
#ifdef DEBUG
static const unsigned int div_tab[] = {
[0] = 1,
[1] = 2,
[2] = 4,
[3] = 8,
[4] = 16,
[5] = 32,
[6] = 64,
[7] = 128,
[8] = 3,
[9] = 6,
[10] = 12,
[11] = 24,
[12] = 48,
[13] = 96,
[14] = 192,
[15] = 384,
[16] = 5,
[17] = 10,
[18] = 20,
[19] = 40,
[20] = 80,
[21] = 160,
[22] = 320,
[23] = 604,
};
static unsigned long decode_div(unsigned long pll2, unsigned long val,
unsigned int lshft, unsigned int selbit,
unsigned long mask)
{
if (val & selbit)
pll2 = 288 * MHZ;
return pll2 / div_tab[(val >> lshft) & mask];
}
#define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
/* sm501_dump_clk
*
* Print out the current clock configuration for the device
*/
static void sm501_dump_clk(struct sm501_devdata *sm)
{
unsigned long misct = smc501_readl(sm->regs + SM501_MISC_TIMING);
unsigned long pm0 = smc501_readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
unsigned long pm1 = smc501_readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
unsigned long pmc = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
unsigned long sdclk0, sdclk1;
unsigned long pll2 = 0;
switch (misct & 0x30) {
case 0x00:
pll2 = 336 * MHZ;
break;
case 0x10:
pll2 = 288 * MHZ;
break;
case 0x20:
pll2 = 240 * MHZ;
break;
case 0x30:
pll2 = 192 * MHZ;
break;
}
sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ;
sdclk0 /= div_tab[((misct >> 8) & 0xf)];
sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ;
sdclk1 /= div_tab[((misct >> 16) & 0xf)];
dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n",
misct, pm0, pm1);
dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n",
fmt_freq(pll2), sdclk0, sdclk1);
dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1);
dev_dbg(sm->dev, "PM0[%c]: "
"P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
"M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
(pmc & 3 ) == 0 ? '*' : '-',
fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)),
fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)),
fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)),
fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15)));
dev_dbg(sm->dev, "PM1[%c]: "
"P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
"M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
(pmc & 3 ) == 1 ? '*' : '-',
fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)),
fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)),
fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)),
fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15)));
}
static void sm501_dump_regs(struct sm501_devdata *sm)
{
void __iomem *regs = sm->regs;
dev_info(sm->dev, "System Control %08x\n",
smc501_readl(regs + SM501_SYSTEM_CONTROL));
dev_info(sm->dev, "Misc Control %08x\n",
smc501_readl(regs + SM501_MISC_CONTROL));
dev_info(sm->dev, "GPIO Control Low %08x\n",
smc501_readl(regs + SM501_GPIO31_0_CONTROL));
dev_info(sm->dev, "GPIO Control Hi %08x\n",
smc501_readl(regs + SM501_GPIO63_32_CONTROL));
dev_info(sm->dev, "DRAM Control %08x\n",
smc501_readl(regs + SM501_DRAM_CONTROL));
dev_info(sm->dev, "Arbitration Ctrl %08x\n",
smc501_readl(regs + SM501_ARBTRTN_CONTROL));
dev_info(sm->dev, "Misc Timing %08x\n",
smc501_readl(regs + SM501_MISC_TIMING));
}
static void sm501_dump_gate(struct sm501_devdata *sm)
{
dev_info(sm->dev, "CurrentGate %08x\n",
smc501_readl(sm->regs + SM501_CURRENT_GATE));
dev_info(sm->dev, "CurrentClock %08x\n",
smc501_readl(sm->regs + SM501_CURRENT_CLOCK));
dev_info(sm->dev, "PowerModeControl %08x\n",
smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL));
}
#else
static inline void sm501_dump_gate(struct sm501_devdata *sm) { }
static inline void sm501_dump_regs(struct sm501_devdata *sm) { }
static inline void sm501_dump_clk(struct sm501_devdata *sm) { }
#endif
/* sm501_sync_regs
*
* ensure the
*/
static void sm501_sync_regs(struct sm501_devdata *sm)
{
smc501_readl(sm->regs);
}
static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay)
{
/* during suspend/resume, we are currently not allowed to sleep,
* so change to using mdelay() instead of msleep() if we
* are in one of these paths */
if (sm->in_suspend)
mdelay(delay);
else
msleep(delay);
}
/* sm501_misc_control
*
* alters the miscellaneous control parameters
*/
int sm501_misc_control(struct device *dev,
unsigned long set, unsigned long clear)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long misc;
unsigned long save;
unsigned long to;
spin_lock_irqsave(&sm->reg_lock, save);
misc = smc501_readl(sm->regs + SM501_MISC_CONTROL);
to = (misc & ~clear) | set;
if (to != misc) {
smc501_writel(to, sm->regs + SM501_MISC_CONTROL);
sm501_sync_regs(sm);
dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc);
}
spin_unlock_irqrestore(&sm->reg_lock, save);
return to;
}
EXPORT_SYMBOL_GPL(sm501_misc_control);
/* sm501_modify_reg
*
* Modify a register in the SM501 which may be shared with other
* drivers.
*/
unsigned long sm501_modify_reg(struct device *dev,
unsigned long reg,
unsigned long set,
unsigned long clear)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long data;
unsigned long save;
spin_lock_irqsave(&sm->reg_lock, save);
data = smc501_readl(sm->regs + reg);
data |= set;
data &= ~clear;
smc501_writel(data, sm->regs + reg);
sm501_sync_regs(sm);
spin_unlock_irqrestore(&sm->reg_lock, save);
return data;
}
EXPORT_SYMBOL_GPL(sm501_modify_reg);
/* sm501_unit_power
*
* alters the power active gate to set specific units on or off
*/
int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long mode;
unsigned long gate;
unsigned long clock;
mutex_lock(&sm->clock_lock);
mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
mode &= 3; /* get current power mode */
if (unit >= ARRAY_SIZE(sm->unit_power)) {
dev_err(dev, "%s: bad unit %d\n", __func__, unit);
goto already;
}
dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit,
sm->unit_power[unit], to);
if (to == 0 && sm->unit_power[unit] == 0) {
dev_err(sm->dev, "unit %d is already shutdown\n", unit);
goto already;
}
sm->unit_power[unit] += to ? 1 : -1;
to = sm->unit_power[unit] ? 1 : 0;
if (to) {
if (gate & (1 << unit))
goto already;
gate |= (1 << unit);
} else {
if (!(gate & (1 << unit)))
goto already;
gate &= ~(1 << unit);
}
switch (mode) {
case 1:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
mode = 0;
break;
case 2:
case 0:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
mode = 1;
break;
default:
gate = -1;
goto already;
}
smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
sm501_sync_regs(sm);
dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
gate, clock, mode);
sm501_mdelay(sm, 16);
already:
mutex_unlock(&sm->clock_lock);
return gate;
}
EXPORT_SYMBOL_GPL(sm501_unit_power);
/* Perform a rounded division. */
static long sm501fb_round_div(long num, long denom)
{
/* n / d + 1 / 2 = (2n + d) / 2d */
return (2 * num + denom) / (2 * denom);
}
/* clock value structure. */
struct sm501_clock {
unsigned long mclk;
int divider;
int shift;
unsigned int m, n, k;
};
/* sm501_calc_clock
*
* Calculates the nearest discrete clock frequency that
* can be achieved with the specified input clock.
* the maximum divisor is 3 or 5
*/
static int sm501_calc_clock(unsigned long freq,
struct sm501_clock *clock,
int max_div,
unsigned long mclk,
long *best_diff)
{
int ret = 0;
int divider;
int shift;
long diff;
/* try dividers 1 and 3 for CRT and for panel,
try divider 5 for panel only.*/
for (divider = 1; divider <= max_div; divider += 2) {
/* try all 8 shift values.*/
for (shift = 0; shift < 8; shift++) {
/* Calculate difference to requested clock */
diff = sm501fb_round_div(mclk, divider << shift) - freq;
if (diff < 0)
diff = -diff;
/* If it is less than the current, use it */
if (diff < *best_diff) {
*best_diff = diff;
clock->mclk = mclk;
clock->divider = divider;
clock->shift = shift;
ret = 1;
}
}
}
return ret;
}
/* sm501_calc_pll
*
* Calculates the nearest discrete clock frequency that can be
* achieved using the programmable PLL.
* the maximum divisor is 3 or 5
*/
static unsigned long sm501_calc_pll(unsigned long freq,
struct sm501_clock *clock,
int max_div)
{
unsigned long mclk;
unsigned int m, n, k;
long best_diff = 999999999;
/*
* The SM502 datasheet doesn't specify the min/max values for M and N.
* N = 1 at least doesn't work in practice.
*/
for (m = 2; m <= 255; m++) {
for (n = 2; n <= 127; n++) {
for (k = 0; k <= 1; k++) {
mclk = (24000000UL * m / n) >> k;
if (sm501_calc_clock(freq, clock, max_div,
mclk, &best_diff)) {
clock->m = m;
clock->n = n;
clock->k = k;
}
}
}
}
/* Return best clock. */
return clock->mclk / (clock->divider << clock->shift);
}
/* sm501_select_clock
*
* Calculates the nearest discrete clock frequency that can be
* achieved using the 288MHz and 336MHz PLLs.
* the maximum divisor is 3 or 5
*/
static unsigned long sm501_select_clock(unsigned long freq,
struct sm501_clock *clock,
int max_div)
{
unsigned long mclk;
long best_diff = 999999999;
/* Try 288MHz and 336MHz clocks. */
for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) {
sm501_calc_clock(freq, clock, max_div, mclk, &best_diff);
}
/* Return best clock. */
return clock->mclk / (clock->divider << clock->shift);
}
/* sm501_set_clock
*
* set one of the four clock sources to the closest available frequency to
* the one specified
*/
unsigned long sm501_set_clock(struct device *dev,
int clksrc,
unsigned long req_freq)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
unsigned long gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
unsigned long clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
unsigned char reg;
unsigned int pll_reg = 0;
unsigned long sm501_freq; /* the actual frequency achieved */
struct sm501_clock to;
/* find achivable discrete frequency and setup register value
* accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK
* has an extra bit for the divider */
switch (clksrc) {
case SM501_CLOCK_P2XCLK:
/* This clock is divided in half so to achieve the
* requested frequency the value must be multiplied by
* 2. This clock also has an additional pre divisor */
if (sm->rev >= 0xC0) {
/* SM502 -> use the programmable PLL */
sm501_freq = (sm501_calc_pll(2 * req_freq,
&to, 5) / 2);
reg = to.shift & 0x07;/* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
else if (to.divider == 5)
reg |= 0x10; /* /5 divider required */
reg |= 0x40; /* select the programmable PLL */
pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m;
} else {
sm501_freq = (sm501_select_clock(2 * req_freq,
&to, 5) / 2);
reg = to.shift & 0x07;/* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
else if (to.divider == 5)
reg |= 0x10; /* /5 divider required */
if (to.mclk != 288000000)
reg |= 0x20; /* which mclk pll is source */
}
break;
case SM501_CLOCK_V2XCLK:
/* This clock is divided in half so to achieve the
* requested frequency the value must be multiplied by 2. */
sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
reg=to.shift & 0x07; /* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
if (to.mclk != 288000000)
reg |= 0x10; /* which mclk pll is source */
break;
case SM501_CLOCK_MCLK:
case SM501_CLOCK_M1XCLK:
/* These clocks are the same and not further divided */
sm501_freq = sm501_select_clock( req_freq, &to, 3);
reg=to.shift & 0x07; /* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
if (to.mclk != 288000000)
reg |= 0x10; /* which mclk pll is source */
break;
default:
return 0; /* this is bad */
}
mutex_lock(&sm->clock_lock);
mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
clock = clock & ~(0xFF << clksrc);
clock |= reg<<clksrc;
mode &= 3; /* find current mode */
switch (mode) {
case 1:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
mode = 0;
break;
case 2:
case 0:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
mode = 1;
break;
default:
mutex_unlock(&sm->clock_lock);
return -1;
}
smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
if (pll_reg)
smc501_writel(pll_reg,
sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
sm501_sync_regs(sm);
dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
gate, clock, mode);
sm501_mdelay(sm, 16);
mutex_unlock(&sm->clock_lock);
sm501_dump_clk(sm);
return sm501_freq;
}
EXPORT_SYMBOL_GPL(sm501_set_clock);
/* sm501_find_clock
*
* finds the closest available frequency for a given clock
*/
unsigned long sm501_find_clock(struct device *dev,
int clksrc,
unsigned long req_freq)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long sm501_freq; /* the frequency achieveable by the 501 */
struct sm501_clock to;
switch (clksrc) {
case SM501_CLOCK_P2XCLK:
if (sm->rev >= 0xC0) {
/* SM502 -> use the programmable PLL */
sm501_freq = (sm501_calc_pll(2 * req_freq,
&to, 5) / 2);
} else {
sm501_freq = (sm501_select_clock(2 * req_freq,
&to, 5) / 2);
}
break;
case SM501_CLOCK_V2XCLK:
sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
break;
case SM501_CLOCK_MCLK:
case SM501_CLOCK_M1XCLK:
sm501_freq = sm501_select_clock(req_freq, &to, 3);
break;
default:
sm501_freq = 0; /* error */
}
return sm501_freq;
}
EXPORT_SYMBOL_GPL(sm501_find_clock);
static struct sm501_device *to_sm_device(struct platform_device *pdev)
{
return container_of(pdev, struct sm501_device, pdev);
}
/* sm501_device_release
*
* A release function for the platform devices we create to allow us to
* free any items we allocated
*/
static void sm501_device_release(struct device *dev)
{
kfree(to_sm_device(to_platform_device(dev)));
}
/* sm501_create_subdev
*
* Create a skeleton platform device with resources for passing to a
* sub-driver
*/
static struct platform_device *
sm501_create_subdev(struct sm501_devdata *sm, char *name,
unsigned int res_count, unsigned int platform_data_size)
{
struct sm501_device *smdev;
smdev = kzalloc(sizeof(struct sm501_device) +
(sizeof(struct resource) * res_count) +
platform_data_size, GFP_KERNEL);
if (!smdev)
return NULL;
smdev->pdev.dev.release = sm501_device_release;
smdev->pdev.name = name;
smdev->pdev.id = sm->pdev_id;
smdev->pdev.dev.parent = sm->dev;
if (res_count) {
smdev->pdev.resource = (struct resource *)(smdev+1);
smdev->pdev.num_resources = res_count;
}
if (platform_data_size)
smdev->pdev.dev.platform_data = (void *)(smdev+1);
return &smdev->pdev;
}
/* sm501_register_device
*
* Register a platform device created with sm501_create_subdev()
*/
static int sm501_register_device(struct sm501_devdata *sm,
struct platform_device *pdev)
{
struct sm501_device *smdev = to_sm_device(pdev);
int ptr;
int ret;
for (ptr = 0; ptr < pdev->num_resources; ptr++) {
printk(KERN_DEBUG "%s[%d] %pR\n",
pdev->name, ptr, &pdev->resource[ptr]);
}
ret = platform_device_register(pdev);
if (ret >= 0) {
dev_dbg(sm->dev, "registered %s\n", pdev->name);
list_add_tail(&smdev->list, &sm->devices);
} else
dev_err(sm->dev, "error registering %s (%d)\n",
pdev->name, ret);
return ret;
}
/* sm501_create_subio
*
* Fill in an IO resource for a sub device
*/
static void sm501_create_subio(struct sm501_devdata *sm,
struct resource *res,
resource_size_t offs,
resource_size_t size)
{
res->flags = IORESOURCE_MEM;
res->parent = sm->io_res;
res->start = sm->io_res->start + offs;
res->end = res->start + size - 1;
}
/* sm501_create_mem
*
* Fill in an MEM resource for a sub device
*/
static void sm501_create_mem(struct sm501_devdata *sm,
struct resource *res,
resource_size_t *offs,
resource_size_t size)
{
*offs -= size; /* adjust memory size */
res->flags = IORESOURCE_MEM;
res->parent = sm->mem_res;
res->start = sm->mem_res->start + *offs;
res->end = res->start + size - 1;
}
/* sm501_create_irq
*
* Fill in an IRQ resource for a sub device
*/
static void sm501_create_irq(struct sm501_devdata *sm,
struct resource *res)
{
res->flags = IORESOURCE_IRQ;
res->parent = NULL;
res->start = res->end = sm->irq;
}
static int sm501_register_usbhost(struct sm501_devdata *sm,
resource_size_t *mem_avail)
{
struct platform_device *pdev;
pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0);
if (!pdev)
return -ENOMEM;
sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000);
sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024);
sm501_create_irq(sm, &pdev->resource[2]);
return sm501_register_device(sm, pdev);
}
static void sm501_setup_uart_data(struct sm501_devdata *sm,
struct plat_serial8250_port *uart_data,
unsigned int offset)
{
uart_data->membase = sm->regs + offset;
uart_data->mapbase = sm->io_res->start + offset;
uart_data->iotype = UPIO_MEM;
uart_data->irq = sm->irq;
uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ;
uart_data->regshift = 2;
uart_data->uartclk = (9600 * 16);
}
static int sm501_register_uart(struct sm501_devdata *sm, int devices)
{
struct platform_device *pdev;
struct plat_serial8250_port *uart_data;
pdev = sm501_create_subdev(sm, "serial8250", 0,
sizeof(struct plat_serial8250_port) * 3);
if (!pdev)
return -ENOMEM;
uart_data = pdev->dev.platform_data;
if (devices & SM501_USE_UART0) {
sm501_setup_uart_data(sm, uart_data++, 0x30000);
sm501_unit_power(sm->dev, SM501_GATE_UART0, 1);
sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0);
sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0);
}
if (devices & SM501_USE_UART1) {
sm501_setup_uart_data(sm, uart_data++, 0x30020);
sm501_unit_power(sm->dev, SM501_GATE_UART1, 1);
sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0);
sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0);
}
pdev->id = PLAT8250_DEV_SM501;
return sm501_register_device(sm, pdev);
}
static int sm501_register_display(struct sm501_devdata *sm,
resource_size_t *mem_avail)
{
struct platform_device *pdev;
pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0);
if (!pdev)
return -ENOMEM;
sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000);
sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000);
sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail);
sm501_create_irq(sm, &pdev->resource[3]);
return sm501_register_device(sm, pdev);
}
#ifdef CONFIG_MFD_SM501_GPIO
static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc)
{
return container_of(gc, struct sm501_gpio_chip, gpio);
}
static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio)
{
return container_of(gpio, struct sm501_devdata, gpio);
}
static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip);
unsigned long result;
result = smc501_readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
result >>= offset;
return result & 1UL;
}
static void sm501_gpio_ensure_gpio(struct sm501_gpio_chip *smchip,
unsigned long bit)
{
unsigned long ctrl;
/* check and modify if this pin is not set as gpio. */
if (smc501_readl(smchip->control) & bit) {
dev_info(sm501_gpio_to_dev(smchip->ourgpio)->dev,
"changing mode of gpio, bit %08lx\n", bit);
ctrl = smc501_readl(smchip->control);
ctrl &= ~bit;
smc501_writel(ctrl, smchip->control);
sm501_sync_regs(sm501_gpio_to_dev(smchip->ourgpio));
}
}
static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
unsigned long bit = 1 << offset;
void __iomem *regs = smchip->regbase;
unsigned long save;
unsigned long val;
dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
__func__, chip, offset);
spin_lock_irqsave(&smgpio->lock, save);
val = smc501_readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
if (value)
val |= bit;
smc501_writel(val, regs);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
sm501_gpio_ensure_gpio(smchip, bit);
spin_unlock_irqrestore(&smgpio->lock, save);
}
static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
{
struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
void __iomem *regs = smchip->regbase;
unsigned long bit = 1 << offset;
unsigned long save;
unsigned long ddr;
dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
__func__, chip, offset);
spin_lock_irqsave(&smgpio->lock, save);
ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW);
smc501_writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
sm501_gpio_ensure_gpio(smchip, bit);
spin_unlock_irqrestore(&smgpio->lock, save);
return 0;
}
static int sm501_gpio_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
unsigned long bit = 1 << offset;
void __iomem *regs = smchip->regbase;
unsigned long save;
unsigned long val;
unsigned long ddr;
dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n",
__func__, chip, offset, value);
spin_lock_irqsave(&smgpio->lock, save);
val = smc501_readl(regs + SM501_GPIO_DATA_LOW);
if (value)
val |= bit;