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14#include <linux/io.h>
15#include <linux/clk.h>
16#include <linux/clkdev.h>
17#include <linux/delay.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/pm_domain.h>
21#include <linux/pm_runtime.h>
22#include <linux/reset.h>
23#include <linux/of_address.h>
24#include <linux/of_platform.h>
25#include <linux/slab.h>
26#include <linux/iopoll.h>
27
28#include <linux/platform_data/ti-sysc.h>
29
30#include <dt-bindings/bus/ti-sysc.h>
31
32#define MAX_MODULE_SOFTRESET_WAIT 10000
33
34static const char * const reg_names[] = { "rev", "sysc", "syss", };
35
36enum sysc_clocks {
37 SYSC_FCK,
38 SYSC_ICK,
39 SYSC_OPTFCK0,
40 SYSC_OPTFCK1,
41 SYSC_OPTFCK2,
42 SYSC_OPTFCK3,
43 SYSC_OPTFCK4,
44 SYSC_OPTFCK5,
45 SYSC_OPTFCK6,
46 SYSC_OPTFCK7,
47 SYSC_MAX_CLOCKS,
48};
49
50static const char * const clock_names[SYSC_MAX_CLOCKS] = {
51 "fck", "ick", "opt0", "opt1", "opt2", "opt3", "opt4",
52 "opt5", "opt6", "opt7",
53};
54
55#define SYSC_IDLEMODE_MASK 3
56#define SYSC_CLOCKACTIVITY_MASK 3
57
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77
78struct sysc {
79 struct device *dev;
80 u64 module_pa;
81 u32 module_size;
82 void __iomem *module_va;
83 int offsets[SYSC_MAX_REGS];
84 struct ti_sysc_module_data *mdata;
85 struct clk **clocks;
86 const char **clock_roles;
87 int nr_clocks;
88 struct reset_control *rsts;
89 const char *legacy_mode;
90 const struct sysc_capabilities *cap;
91 struct sysc_config cfg;
92 struct ti_sysc_cookie cookie;
93 const char *name;
94 u32 revision;
95 unsigned int enabled:1;
96 unsigned int needs_resume:1;
97 unsigned int child_needs_resume:1;
98 unsigned int disable_on_idle:1;
99 struct delayed_work idle_work;
100 void (*clk_enable_quirk)(struct sysc *sysc);
101 void (*clk_disable_quirk)(struct sysc *sysc);
102 void (*reset_done_quirk)(struct sysc *sysc);
103};
104
105static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
106 bool is_child);
107
108static void sysc_write(struct sysc *ddata, int offset, u32 value)
109{
110 if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
111 writew_relaxed(value & 0xffff, ddata->module_va + offset);
112
113
114 if (ddata->offsets[SYSC_REVISION] >= 0 &&
115 offset == ddata->offsets[SYSC_REVISION]) {
116 u16 hi = value >> 16;
117
118 writew_relaxed(hi, ddata->module_va + offset + 4);
119 }
120
121 return;
122 }
123
124 writel_relaxed(value, ddata->module_va + offset);
125}
126
127static u32 sysc_read(struct sysc *ddata, int offset)
128{
129 if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
130 u32 val;
131
132 val = readw_relaxed(ddata->module_va + offset);
133
134
135 if (ddata->offsets[SYSC_REVISION] >= 0 &&
136 offset == ddata->offsets[SYSC_REVISION]) {
137 u16 tmp = readw_relaxed(ddata->module_va + offset + 4);
138
139 val |= tmp << 16;
140 }
141
142 return val;
143 }
144
145 return readl_relaxed(ddata->module_va + offset);
146}
147
148static bool sysc_opt_clks_needed(struct sysc *ddata)
149{
150 return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
151}
152
153static u32 sysc_read_revision(struct sysc *ddata)
154{
155 int offset = ddata->offsets[SYSC_REVISION];
156
157 if (offset < 0)
158 return 0;
159
160 return sysc_read(ddata, offset);
161}
162
163static u32 sysc_read_sysconfig(struct sysc *ddata)
164{
165 int offset = ddata->offsets[SYSC_SYSCONFIG];
166
167 if (offset < 0)
168 return 0;
169
170 return sysc_read(ddata, offset);
171}
172
173static u32 sysc_read_sysstatus(struct sysc *ddata)
174{
175 int offset = ddata->offsets[SYSC_SYSSTATUS];
176
177 if (offset < 0)
178 return 0;
179
180 return sysc_read(ddata, offset);
181}
182
183static int sysc_add_named_clock_from_child(struct sysc *ddata,
184 const char *name,
185 const char *optfck_name)
186{
187 struct device_node *np = ddata->dev->of_node;
188 struct device_node *child;
189 struct clk_lookup *cl;
190 struct clk *clock;
191 const char *n;
192
193 if (name)
194 n = name;
195 else
196 n = optfck_name;
197
198
199 clock = of_clk_get_by_name(np, n);
200 if (!IS_ERR(clock)) {
201 clk_put(clock);
202
203 return 0;
204 }
205
206 child = of_get_next_available_child(np, NULL);
207 if (!child)
208 return -ENODEV;
209
210 clock = devm_get_clk_from_child(ddata->dev, child, name);
211 if (IS_ERR(clock))
212 return PTR_ERR(clock);
213
214
215
216
217
218
219 cl = kcalloc(1, sizeof(*cl), GFP_KERNEL);
220 if (!cl)
221 return -ENOMEM;
222
223 cl->con_id = n;
224 cl->dev_id = dev_name(ddata->dev);
225 cl->clk = clock;
226 clkdev_add(cl);
227
228 clk_put(clock);
229
230 return 0;
231}
232
233static int sysc_init_ext_opt_clock(struct sysc *ddata, const char *name)
234{
235 const char *optfck_name;
236 int error, index;
237
238 if (ddata->nr_clocks < SYSC_OPTFCK0)
239 index = SYSC_OPTFCK0;
240 else
241 index = ddata->nr_clocks;
242
243 if (name)
244 optfck_name = name;
245 else
246 optfck_name = clock_names[index];
247
248 error = sysc_add_named_clock_from_child(ddata, name, optfck_name);
249 if (error)
250 return error;
251
252 ddata->clock_roles[index] = optfck_name;
253 ddata->nr_clocks++;
254
255 return 0;
256}
257
258static int sysc_get_one_clock(struct sysc *ddata, const char *name)
259{
260 int error, i, index = -ENODEV;
261
262 if (!strncmp(clock_names[SYSC_FCK], name, 3))
263 index = SYSC_FCK;
264 else if (!strncmp(clock_names[SYSC_ICK], name, 3))
265 index = SYSC_ICK;
266
267 if (index < 0) {
268 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
269 if (!ddata->clocks[i]) {
270 index = i;
271 break;
272 }
273 }
274 }
275
276 if (index < 0) {
277 dev_err(ddata->dev, "clock %s not added\n", name);
278 return index;
279 }
280
281 ddata->clocks[index] = devm_clk_get(ddata->dev, name);
282 if (IS_ERR(ddata->clocks[index])) {
283 if (PTR_ERR(ddata->clocks[index]) == -ENOENT)
284 return 0;
285
286 dev_err(ddata->dev, "clock get error for %s: %li\n",
287 name, PTR_ERR(ddata->clocks[index]));
288
289 return PTR_ERR(ddata->clocks[index]);
290 }
291
292 error = clk_prepare(ddata->clocks[index]);
293 if (error) {
294 dev_err(ddata->dev, "clock prepare error for %s: %i\n",
295 name, error);
296
297 return error;
298 }
299
300 return 0;
301}
302
303static int sysc_get_clocks(struct sysc *ddata)
304{
305 struct device_node *np = ddata->dev->of_node;
306 struct property *prop;
307 const char *name;
308 int nr_fck = 0, nr_ick = 0, i, error = 0;
309
310 ddata->clock_roles = devm_kcalloc(ddata->dev,
311 SYSC_MAX_CLOCKS,
312 sizeof(*ddata->clock_roles),
313 GFP_KERNEL);
314 if (!ddata->clock_roles)
315 return -ENOMEM;
316
317 of_property_for_each_string(np, "clock-names", prop, name) {
318 if (!strncmp(clock_names[SYSC_FCK], name, 3))
319 nr_fck++;
320 if (!strncmp(clock_names[SYSC_ICK], name, 3))
321 nr_ick++;
322 ddata->clock_roles[ddata->nr_clocks] = name;
323 ddata->nr_clocks++;
324 }
325
326 if (ddata->nr_clocks < 1)
327 return 0;
328
329 if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) {
330 error = sysc_init_ext_opt_clock(ddata, NULL);
331 if (error)
332 return error;
333 }
334
335 if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
336 dev_err(ddata->dev, "too many clocks for %pOF\n", np);
337
338 return -EINVAL;
339 }
340
341 if (nr_fck > 1 || nr_ick > 1) {
342 dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
343
344 return -EINVAL;
345 }
346
347 ddata->clocks = devm_kcalloc(ddata->dev,
348 ddata->nr_clocks, sizeof(*ddata->clocks),
349 GFP_KERNEL);
350 if (!ddata->clocks)
351 return -ENOMEM;
352
353 for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
354 const char *name = ddata->clock_roles[i];
355
356 if (!name)
357 continue;
358
359 error = sysc_get_one_clock(ddata, name);
360 if (error && error != -ENOENT)
361 return error;
362 }
363
364 return 0;
365}
366
367static int sysc_enable_main_clocks(struct sysc *ddata)
368{
369 struct clk *clock;
370 int i, error;
371
372 if (!ddata->clocks)
373 return 0;
374
375 for (i = 0; i < SYSC_OPTFCK0; i++) {
376 clock = ddata->clocks[i];
377
378
379 if (IS_ERR_OR_NULL(clock))
380 continue;
381
382 error = clk_enable(clock);
383 if (error)
384 goto err_disable;
385 }
386
387 return 0;
388
389err_disable:
390 for (i--; i >= 0; i--) {
391 clock = ddata->clocks[i];
392
393
394 if (IS_ERR_OR_NULL(clock))
395 continue;
396
397 clk_disable(clock);
398 }
399
400 return error;
401}
402
403static void sysc_disable_main_clocks(struct sysc *ddata)
404{
405 struct clk *clock;
406 int i;
407
408 if (!ddata->clocks)
409 return;
410
411 for (i = 0; i < SYSC_OPTFCK0; i++) {
412 clock = ddata->clocks[i];
413 if (IS_ERR_OR_NULL(clock))
414 continue;
415
416 clk_disable(clock);
417 }
418}
419
420static int sysc_enable_opt_clocks(struct sysc *ddata)
421{
422 struct clk *clock;
423 int i, error;
424
425 if (!ddata->clocks)
426 return 0;
427
428 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
429 clock = ddata->clocks[i];
430
431
432 if (IS_ERR_OR_NULL(clock))
433 return 0;
434
435 error = clk_enable(clock);
436 if (error)
437 goto err_disable;
438 }
439
440 return 0;
441
442err_disable:
443 for (i--; i >= 0; i--) {
444 clock = ddata->clocks[i];
445 if (IS_ERR_OR_NULL(clock))
446 continue;
447
448 clk_disable(clock);
449 }
450
451 return error;
452}
453
454static void sysc_disable_opt_clocks(struct sysc *ddata)
455{
456 struct clk *clock;
457 int i;
458
459 if (!ddata->clocks)
460 return;
461
462 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
463 clock = ddata->clocks[i];
464
465
466 if (IS_ERR_OR_NULL(clock))
467 return;
468
469 clk_disable(clock);
470 }
471}
472
473static void sysc_clkdm_deny_idle(struct sysc *ddata)
474{
475 struct ti_sysc_platform_data *pdata;
476
477 if (ddata->legacy_mode)
478 return;
479
480 pdata = dev_get_platdata(ddata->dev);
481 if (pdata && pdata->clkdm_deny_idle)
482 pdata->clkdm_deny_idle(ddata->dev, &ddata->cookie);
483}
484
485static void sysc_clkdm_allow_idle(struct sysc *ddata)
486{
487 struct ti_sysc_platform_data *pdata;
488
489 if (ddata->legacy_mode)
490 return;
491
492 pdata = dev_get_platdata(ddata->dev);
493 if (pdata && pdata->clkdm_allow_idle)
494 pdata->clkdm_allow_idle(ddata->dev, &ddata->cookie);
495}
496
497
498
499
500
501
502
503static int sysc_init_resets(struct sysc *ddata)
504{
505 ddata->rsts =
506 devm_reset_control_get_optional(ddata->dev, "rstctrl");
507 if (IS_ERR(ddata->rsts))
508 return PTR_ERR(ddata->rsts);
509
510 return 0;
511}
512
513
514
515
516
517
518
519
520
521
522static int sysc_parse_and_check_child_range(struct sysc *ddata)
523{
524 struct device_node *np = ddata->dev->of_node;
525 const __be32 *ranges;
526 u32 nr_addr, nr_size;
527 int len, error;
528
529 ranges = of_get_property(np, "ranges", &len);
530 if (!ranges) {
531 dev_err(ddata->dev, "missing ranges for %pOF\n", np);
532
533 return -ENOENT;
534 }
535
536 len /= sizeof(*ranges);
537
538 if (len < 3) {
539 dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
540
541 return -EINVAL;
542 }
543
544 error = of_property_read_u32(np, "#address-cells", &nr_addr);
545 if (error)
546 return -ENOENT;
547
548 error = of_property_read_u32(np, "#size-cells", &nr_size);
549 if (error)
550 return -ENOENT;
551
552 if (nr_addr != 1 || nr_size != 1) {
553 dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
554
555 return -EINVAL;
556 }
557
558 ranges++;
559 ddata->module_pa = of_translate_address(np, ranges++);
560 ddata->module_size = be32_to_cpup(ranges);
561
562 return 0;
563}
564
565static struct device_node *stdout_path;
566
567static void sysc_init_stdout_path(struct sysc *ddata)
568{
569 struct device_node *np = NULL;
570 const char *uart;
571
572 if (IS_ERR(stdout_path))
573 return;
574
575 if (stdout_path)
576 return;
577
578 np = of_find_node_by_path("/chosen");
579 if (!np)
580 goto err;
581
582 uart = of_get_property(np, "stdout-path", NULL);
583 if (!uart)
584 goto err;
585
586 np = of_find_node_by_path(uart);
587 if (!np)
588 goto err;
589
590 stdout_path = np;
591
592 return;
593
594err:
595 stdout_path = ERR_PTR(-ENODEV);
596}
597
598static void sysc_check_quirk_stdout(struct sysc *ddata,
599 struct device_node *np)
600{
601 sysc_init_stdout_path(ddata);
602 if (np != stdout_path)
603 return;
604
605 ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
606 SYSC_QUIRK_NO_RESET_ON_INIT;
607}
608
609
610
611
612
613
614
615
616
617
618static int sysc_check_one_child(struct sysc *ddata,
619 struct device_node *np)
620{
621 const char *name;
622
623 name = of_get_property(np, "ti,hwmods", NULL);
624 if (name)
625 dev_warn(ddata->dev, "really a child ti,hwmods property?");
626
627 sysc_check_quirk_stdout(ddata, np);
628 sysc_parse_dts_quirks(ddata, np, true);
629
630 return 0;
631}
632
633static int sysc_check_children(struct sysc *ddata)
634{
635 struct device_node *child;
636 int error;
637
638 for_each_child_of_node(ddata->dev->of_node, child) {
639 error = sysc_check_one_child(ddata, child);
640 if (error)
641 return error;
642 }
643
644 return 0;
645}
646
647
648
649
650
651
652
653static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res)
654{
655 if (resource_size(res) == 8)
656 ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT;
657}
658
659
660
661
662
663
664static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg)
665{
666 struct resource *res;
667 const char *name;
668
669 switch (reg) {
670 case SYSC_REVISION:
671 case SYSC_SYSCONFIG:
672 case SYSC_SYSSTATUS:
673 name = reg_names[reg];
674 break;
675 default:
676 return -EINVAL;
677 }
678
679 res = platform_get_resource_byname(to_platform_device(ddata->dev),
680 IORESOURCE_MEM, name);
681 if (!res) {
682 ddata->offsets[reg] = -ENODEV;
683
684 return 0;
685 }
686
687 ddata->offsets[reg] = res->start - ddata->module_pa;
688 if (reg == SYSC_REVISION)
689 sysc_check_quirk_16bit(ddata, res);
690
691 return 0;
692}
693
694static int sysc_parse_registers(struct sysc *ddata)
695{
696 int i, error;
697
698 for (i = 0; i < SYSC_MAX_REGS; i++) {
699 error = sysc_parse_one(ddata, i);
700 if (error)
701 return error;
702 }
703
704 return 0;
705}
706
707
708
709
710
711static int sysc_check_registers(struct sysc *ddata)
712{
713 int i, j, nr_regs = 0, nr_matches = 0;
714
715 for (i = 0; i < SYSC_MAX_REGS; i++) {
716 if (ddata->offsets[i] < 0)
717 continue;
718
719 if (ddata->offsets[i] > (ddata->module_size - 4)) {
720 dev_err(ddata->dev, "register outside module range");
721
722 return -EINVAL;
723 }
724
725 for (j = 0; j < SYSC_MAX_REGS; j++) {
726 if (ddata->offsets[j] < 0)
727 continue;
728
729 if (ddata->offsets[i] == ddata->offsets[j])
730 nr_matches++;
731 }
732 nr_regs++;
733 }
734
735 if (nr_matches > nr_regs) {
736 dev_err(ddata->dev, "overlapping registers: (%i/%i)",
737 nr_regs, nr_matches);
738
739 return -EINVAL;
740 }
741
742 return 0;
743}
744
745
746
747
748
749
750
751
752
753
754
755
756static int sysc_ioremap(struct sysc *ddata)
757{
758 int size;
759
760 if (ddata->offsets[SYSC_REVISION] < 0 &&
761 ddata->offsets[SYSC_SYSCONFIG] < 0 &&
762 ddata->offsets[SYSC_SYSSTATUS] < 0) {
763 size = ddata->module_size;
764 } else {
765 size = max3(ddata->offsets[SYSC_REVISION],
766 ddata->offsets[SYSC_SYSCONFIG],
767 ddata->offsets[SYSC_SYSSTATUS]);
768
769 if (size < SZ_1K)
770 size = SZ_1K;
771
772 if ((size + sizeof(u32)) > ddata->module_size)
773 size = ddata->module_size;
774 }
775
776 ddata->module_va = devm_ioremap(ddata->dev,
777 ddata->module_pa,
778 size + sizeof(u32));
779 if (!ddata->module_va)
780 return -EIO;
781
782 return 0;
783}
784
785
786
787
788
789static int sysc_map_and_check_registers(struct sysc *ddata)
790{
791 int error;
792
793 error = sysc_parse_and_check_child_range(ddata);
794 if (error)
795 return error;
796
797 error = sysc_check_children(ddata);
798 if (error)
799 return error;
800
801 error = sysc_parse_registers(ddata);
802 if (error)
803 return error;
804
805 error = sysc_ioremap(ddata);
806 if (error)
807 return error;
808
809 error = sysc_check_registers(ddata);
810 if (error)
811 return error;
812
813 return 0;
814}
815
816
817
818
819
820
821static int sysc_show_rev(char *bufp, struct sysc *ddata)
822{
823 int len;
824
825 if (ddata->offsets[SYSC_REVISION] < 0)
826 return sprintf(bufp, ":NA");
827
828 len = sprintf(bufp, ":%08x", ddata->revision);
829
830 return len;
831}
832
833static int sysc_show_reg(struct sysc *ddata,
834 char *bufp, enum sysc_registers reg)
835{
836 if (ddata->offsets[reg] < 0)
837 return sprintf(bufp, ":NA");
838
839 return sprintf(bufp, ":%x", ddata->offsets[reg]);
840}
841
842static int sysc_show_name(char *bufp, struct sysc *ddata)
843{
844 if (!ddata->name)
845 return 0;
846
847 return sprintf(bufp, ":%s", ddata->name);
848}
849
850
851
852
853
854static void sysc_show_registers(struct sysc *ddata)
855{
856 char buf[128];
857 char *bufp = buf;
858 int i;
859
860 for (i = 0; i < SYSC_MAX_REGS; i++)
861 bufp += sysc_show_reg(ddata, bufp, i);
862
863 bufp += sysc_show_rev(bufp, ddata);
864 bufp += sysc_show_name(bufp, ddata);
865
866 dev_dbg(ddata->dev, "%llx:%x%s\n",
867 ddata->module_pa, ddata->module_size,
868 buf);
869}
870
871#define SYSC_IDLE_MASK (SYSC_NR_IDLEMODES - 1)
872#define SYSC_CLOCACT_ICK 2
873
874
875static int sysc_enable_module(struct device *dev)
876{
877 struct sysc *ddata;
878 const struct sysc_regbits *regbits;
879 u32 reg, idlemodes, best_mode;
880
881 ddata = dev_get_drvdata(dev);
882 if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
883 return 0;
884
885 regbits = ddata->cap->regbits;
886 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
887
888
889 if (regbits->clkact_shift >= 0 &&
890 (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT ||
891 ddata->cfg.sysc_val & BIT(regbits->clkact_shift)))
892 reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift;
893
894
895 idlemodes = ddata->cfg.sidlemodes;
896 if (!idlemodes || regbits->sidle_shift < 0)
897 goto set_midle;
898
899 if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE |
900 SYSC_QUIRK_SWSUP_SIDLE_ACT)) {
901 best_mode = SYSC_IDLE_NO;
902 } else {
903 best_mode = fls(ddata->cfg.sidlemodes) - 1;
904 if (best_mode > SYSC_IDLE_MASK) {
905 dev_err(dev, "%s: invalid sidlemode\n", __func__);
906 return -EINVAL;
907 }
908
909
910 if (regbits->enwkup_shift >= 0 &&
911 ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
912 reg |= BIT(regbits->enwkup_shift);
913 }
914
915 reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
916 reg |= best_mode << regbits->sidle_shift;
917 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
918
919set_midle:
920
921 idlemodes = ddata->cfg.midlemodes;
922 if (!idlemodes || regbits->midle_shift < 0)
923 goto set_autoidle;
924
925 best_mode = fls(ddata->cfg.midlemodes) - 1;
926 if (best_mode > SYSC_IDLE_MASK) {
927 dev_err(dev, "%s: invalid midlemode\n", __func__);
928 return -EINVAL;
929 }
930
931 reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
932 reg |= best_mode << regbits->midle_shift;
933 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
934
935set_autoidle:
936
937 if (regbits->autoidle_shift >= 0 &&
938 ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) {
939 reg |= 1 << regbits->autoidle_shift;
940 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
941 }
942
943 return 0;
944}
945
946static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode)
947{
948 if (idlemodes & BIT(SYSC_IDLE_SMART_WKUP))
949 *best_mode = SYSC_IDLE_SMART_WKUP;
950 else if (idlemodes & BIT(SYSC_IDLE_SMART))
951 *best_mode = SYSC_IDLE_SMART;
952 else if (idlemodes & BIT(SYSC_IDLE_FORCE))
953 *best_mode = SYSC_IDLE_FORCE;
954 else
955 return -EINVAL;
956
957 return 0;
958}
959
960
961static int sysc_disable_module(struct device *dev)
962{
963 struct sysc *ddata;
964 const struct sysc_regbits *regbits;
965 u32 reg, idlemodes, best_mode;
966 int ret;
967
968 ddata = dev_get_drvdata(dev);
969 if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
970 return 0;
971
972 regbits = ddata->cap->regbits;
973 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
974
975
976 idlemodes = ddata->cfg.midlemodes;
977 if (!idlemodes || regbits->midle_shift < 0)
978 goto set_sidle;
979
980 ret = sysc_best_idle_mode(idlemodes, &best_mode);
981 if (ret) {
982 dev_err(dev, "%s: invalid midlemode\n", __func__);
983 return ret;
984 }
985
986 reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
987 reg |= best_mode << regbits->midle_shift;
988 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
989
990set_sidle:
991
992 idlemodes = ddata->cfg.sidlemodes;
993 if (!idlemodes || regbits->sidle_shift < 0)
994 return 0;
995
996 if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) {
997 best_mode = SYSC_IDLE_FORCE;
998 } else {
999 ret = sysc_best_idle_mode(idlemodes, &best_mode);
1000 if (ret) {
1001 dev_err(dev, "%s: invalid sidlemode\n", __func__);
1002 return ret;
1003 }
1004 }
1005
1006 reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
1007 reg |= best_mode << regbits->sidle_shift;
1008 if (regbits->autoidle_shift >= 0 &&
1009 ddata->cfg.sysc_val & BIT(regbits->autoidle_shift))
1010 reg |= 1 << regbits->autoidle_shift;
1011 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
1012
1013 return 0;
1014}
1015
1016static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev,
1017 struct sysc *ddata)
1018{
1019 struct ti_sysc_platform_data *pdata;
1020 int error;
1021
1022 pdata = dev_get_platdata(ddata->dev);
1023 if (!pdata)
1024 return 0;
1025
1026 if (!pdata->idle_module)
1027 return -ENODEV;
1028
1029 error = pdata->idle_module(dev, &ddata->cookie);
1030 if (error)
1031 dev_err(dev, "%s: could not idle: %i\n",
1032 __func__, error);
1033
1034 if (ddata->disable_on_idle)
1035 reset_control_assert(ddata->rsts);
1036
1037 return 0;
1038}
1039
1040static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev,
1041 struct sysc *ddata)
1042{
1043 struct ti_sysc_platform_data *pdata;
1044 int error;
1045
1046 if (ddata->disable_on_idle)
1047 reset_control_deassert(ddata->rsts);
1048
1049 pdata = dev_get_platdata(ddata->dev);
1050 if (!pdata)
1051 return 0;
1052
1053 if (!pdata->enable_module)
1054 return -ENODEV;
1055
1056 error = pdata->enable_module(dev, &ddata->cookie);
1057 if (error)
1058 dev_err(dev, "%s: could not enable: %i\n",
1059 __func__, error);
1060
1061 return 0;
1062}
1063
1064static int __maybe_unused sysc_runtime_suspend(struct device *dev)
1065{
1066 struct sysc *ddata;
1067 int error = 0;
1068
1069 ddata = dev_get_drvdata(dev);
1070
1071 if (!ddata->enabled)
1072 return 0;
1073
1074 sysc_clkdm_deny_idle(ddata);
1075
1076 if (ddata->legacy_mode) {
1077 error = sysc_runtime_suspend_legacy(dev, ddata);
1078 if (error)
1079 goto err_allow_idle;
1080 } else {
1081 error = sysc_disable_module(dev);
1082 if (error)
1083 goto err_allow_idle;
1084 }
1085
1086 sysc_disable_main_clocks(ddata);
1087
1088 if (sysc_opt_clks_needed(ddata))
1089 sysc_disable_opt_clocks(ddata);
1090
1091 ddata->enabled = false;
1092
1093err_allow_idle:
1094 sysc_clkdm_allow_idle(ddata);
1095
1096 if (ddata->disable_on_idle)
1097 reset_control_assert(ddata->rsts);
1098
1099 return error;
1100}
1101
1102static int __maybe_unused sysc_runtime_resume(struct device *dev)
1103{
1104 struct sysc *ddata;
1105 int error = 0;
1106
1107 ddata = dev_get_drvdata(dev);
1108
1109 if (ddata->enabled)
1110 return 0;
1111
1112 if (ddata->disable_on_idle)
1113 reset_control_deassert(ddata->rsts);
1114
1115 sysc_clkdm_deny_idle(ddata);
1116
1117 if (sysc_opt_clks_needed(ddata)) {
1118 error = sysc_enable_opt_clocks(ddata);
1119 if (error)
1120 goto err_allow_idle;
1121 }
1122
1123 error = sysc_enable_main_clocks(ddata);
1124 if (error)
1125 goto err_opt_clocks;
1126
1127 if (ddata->legacy_mode) {
1128 error = sysc_runtime_resume_legacy(dev, ddata);
1129 if (error)
1130 goto err_main_clocks;
1131 } else {
1132 error = sysc_enable_module(dev);
1133 if (error)
1134 goto err_main_clocks;
1135 }
1136
1137 ddata->enabled = true;
1138
1139 sysc_clkdm_allow_idle(ddata);
1140
1141 return 0;
1142
1143err_main_clocks:
1144 sysc_disable_main_clocks(ddata);
1145err_opt_clocks:
1146 if (sysc_opt_clks_needed(ddata))
1147 sysc_disable_opt_clocks(ddata);
1148err_allow_idle:
1149 sysc_clkdm_allow_idle(ddata);
1150
1151 return error;
1152}
1153
1154static int __maybe_unused sysc_noirq_suspend(struct device *dev)
1155{
1156 struct sysc *ddata;
1157
1158 ddata = dev_get_drvdata(dev);
1159
1160 if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
1161 return 0;
1162
1163 return pm_runtime_force_suspend(dev);
1164}
1165
1166static int __maybe_unused sysc_noirq_resume(struct device *dev)
1167{
1168 struct sysc *ddata;
1169
1170 ddata = dev_get_drvdata(dev);
1171
1172 if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
1173 return 0;
1174
1175 return pm_runtime_force_resume(dev);
1176}
1177
1178static const struct dev_pm_ops sysc_pm_ops = {
1179 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
1180 SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
1181 sysc_runtime_resume,
1182 NULL)
1183};
1184
1185
1186struct sysc_revision_quirk {
1187 const char *name;
1188 u32 base;
1189 int rev_offset;
1190 int sysc_offset;
1191 int syss_offset;
1192 u32 revision;
1193 u32 revision_mask;
1194 u32 quirks;
1195};
1196
1197#define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \
1198 optrev_val, optrevmask, optquirkmask) \
1199 { \
1200 .name = (optname), \
1201 .base = (optbase), \
1202 .rev_offset = (optrev), \
1203 .sysc_offset = (optsysc), \
1204 .syss_offset = (optsyss), \
1205 .revision = (optrev_val), \
1206 .revision_mask = (optrevmask), \
1207 .quirks = (optquirkmask), \
1208 }
1209
1210static const struct sysc_revision_quirk sysc_revision_quirks[] = {
1211
1212 SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
1213 SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
1214 SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
1215 SYSC_QUIRK_LEGACY_IDLE),
1216 SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff,
1217 SYSC_QUIRK_LEGACY_IDLE),
1218 SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
1219 SYSC_QUIRK_LEGACY_IDLE),
1220 SYSC_QUIRK("smartreflex", 0, -1, 0x24, -1, 0x00000000, 0xffffffff,
1221 SYSC_QUIRK_LEGACY_IDLE),
1222 SYSC_QUIRK("smartreflex", 0, -1, 0x38, -1, 0x00000000, 0xffffffff,
1223 SYSC_QUIRK_LEGACY_IDLE),
1224 SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff,
1225 0),
1226
1227 SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x50002100, 0xffffffff,
1228 0),
1229 SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x4fff1301, 0xffff00ff,
1230 0),
1231 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
1232 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
1233 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
1234 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
1235
1236 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
1237 SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
1238 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
1239 SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
1240
1241
1242 SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -1, 0x50000800, 0xffffffff,
1243 SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT |
1244 SYSC_QUIRK_SWSUP_SIDLE),
1245
1246
1247 SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
1248 SYSC_MODULE_QUIRK_HDQ1W),
1249 SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,
1250 SYSC_MODULE_QUIRK_HDQ1W),
1251 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000036, 0x000000ff,
1252 SYSC_MODULE_QUIRK_I2C),
1253 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x0000003c, 0x000000ff,
1254 SYSC_MODULE_QUIRK_I2C),
1255 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000040, 0x000000ff,
1256 SYSC_MODULE_QUIRK_I2C),
1257 SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0,
1258 SYSC_MODULE_QUIRK_I2C),
1259 SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
1260 SYSC_MODULE_QUIRK_WDT),
1261
1262#ifdef DEBUG
1263 SYSC_QUIRK("adc", 0, 0, 0x10, -1, 0x47300001, 0xffffffff, 0),
1264 SYSC_QUIRK("atl", 0, 0, -1, -1, 0x0a070100, 0xffffffff, 0),
1265 SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff, 0),
1266 SYSC_QUIRK("cm", 0, 0, -1, -1, 0x40000301, 0xffffffff, 0),
1267 SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
1268 SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902,
1269 0xffff00f0, 0),
1270 SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0xa3170504, 0xffffffff, 0),
1271 SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0x4edb1902, 0xffffffff, 0),
1272 SYSC_QUIRK("dmic", 0, 0, 0x10, -1, 0x50010000, 0xffffffff, 0),
1273 SYSC_QUIRK("dwc3", 0, 0, 0x10, -1, 0x500a0200, 0xffffffff, 0),
1274 SYSC_QUIRK("epwmss", 0, 0, 0x4, -1, 0x47400001, 0xffffffff, 0),
1275 SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0),
1276 SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
1277 SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0),
1278 SYSC_QUIRK("lcdc", 0, 0, 0x54, -1, 0x4f201000, 0xffffffff, 0),
1279 SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44306302, 0xffffffff, 0),
1280 SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44307b02, 0xffffffff, 0),
1281 SYSC_QUIRK("mcbsp", 0, -1, 0x8c, -1, 0, 0, 0),
1282 SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffff00ff, 0),
1283 SYSC_QUIRK("mcspi", 0, 0, 0x110, 0x114, 0x40300a0b, 0xffffffff, 0),
1284 SYSC_QUIRK("mailbox", 0, 0, 0x10, -1, 0x00000400, 0xffffffff, 0),
1285 SYSC_QUIRK("m3", 0, 0, -1, -1, 0x5f580105, 0x0fff0f00, 0),
1286 SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xfffffff0, 0),
1287 SYSC_QUIRK("ocp2scp", 0, 0, -1, -1, 0x50060007, 0xffffffff, 0),
1288 SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff, 0),
1289 SYSC_QUIRK("padconf", 0, 0, -1, -1, 0x40001100, 0xffffffff, 0),
1290 SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff, 0),
1291 SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x00004102, 0xffffffff, 0),
1292 SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000400, 0xffffffff, 0),
1293 SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
1294 SYSC_QUIRK("scm", 0, 0, -1, -1, 0x4e8b0100, 0xffffffff, 0),
1295 SYSC_QUIRK("scm", 0, 0, -1, -1, 0x4f000100, 0xffffffff, 0),
1296 SYSC_QUIRK("scm", 0, 0, -1, -1, 0x40000900, 0xffffffff, 0),
1297 SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff, 0),
1298 SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffff0ff0, 0),
1299 SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0),
1300 SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0),
1301 SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40000902, 0xffffffff, 0),
1302 SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40002903, 0xffffffff, 0),
1303 SYSC_QUIRK("spinlock", 0, 0, 0x10, -1, 0x50020000, 0xffffffff, 0),
1304 SYSC_QUIRK("rng", 0, 0x1fe0, 0x1fe4, -1, 0x00000020, 0xffffffff, 0),
1305 SYSC_QUIRK("rtc", 0, 0x74, 0x78, -1, 0x4eb01908, 0xffff00f0, 0),
1306 SYSC_QUIRK("timer32k", 0, 0, 0x4, -1, 0x00000060, 0xffffffff, 0),
1307 SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0),
1308 SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0),
1309 SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0),
1310 SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -1, 0x50700101, 0xffffffff, 0),
1311 SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
1312 0xffffffff, 0),
1313 SYSC_QUIRK("vfpe", 0, 0, 0x104, -1, 0x4d001200, 0xffffffff, 0),
1314#endif
1315};
1316
1317
1318
1319
1320
1321static void sysc_init_early_quirks(struct sysc *ddata)
1322{
1323 const struct sysc_revision_quirk *q;
1324 int i;
1325
1326 for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
1327 q = &sysc_revision_quirks[i];
1328
1329 if (!q->base)
1330 continue;
1331
1332 if (q->base != ddata->module_pa)
1333 continue;
1334
1335 if (q->rev_offset >= 0 &&
1336 q->rev_offset != ddata->offsets[SYSC_REVISION])
1337 continue;
1338
1339 if (q->sysc_offset >= 0 &&
1340 q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
1341 continue;
1342
1343 if (q->syss_offset >= 0 &&
1344 q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
1345 continue;
1346
1347 ddata->name = q->name;
1348 ddata->cfg.quirks |= q->quirks;
1349 }
1350}
1351
1352
1353static void sysc_init_revision_quirks(struct sysc *ddata)
1354{
1355 const struct sysc_revision_quirk *q;
1356 int i;
1357
1358 for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
1359 q = &sysc_revision_quirks[i];
1360
1361 if (q->base && q->base != ddata->module_pa)
1362 continue;
1363
1364 if (q->rev_offset >= 0 &&
1365 q->rev_offset != ddata->offsets[SYSC_REVISION])
1366 continue;
1367
1368 if (q->sysc_offset >= 0 &&
1369 q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
1370 continue;
1371
1372 if (q->syss_offset >= 0 &&
1373 q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
1374 continue;
1375
1376 if (q->revision == ddata->revision ||
1377 (q->revision & q->revision_mask) ==
1378 (ddata->revision & q->revision_mask)) {
1379 ddata->name = q->name;
1380 ddata->cfg.quirks |= q->quirks;
1381 }
1382 }
1383}
1384
1385
1386static void sysc_clk_enable_quirk_hdq1w(struct sysc *ddata)
1387{
1388 int offset = 0x0c;
1389 u16 val;
1390
1391 val = sysc_read(ddata, offset);
1392 val |= BIT(5);
1393 sysc_write(ddata, offset, val);
1394}
1395
1396
1397static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable)
1398{
1399 int offset;
1400 u16 val;
1401
1402
1403 if ((ddata->revision & 0xffffff00) == 0x001f0000)
1404 offset = 0x24;
1405 else
1406 offset = 0xa4;
1407
1408
1409 val = sysc_read(ddata, offset);
1410 if (enable)
1411 val |= BIT(15);
1412 else
1413 val &= ~BIT(15);
1414 sysc_write(ddata, offset, val);
1415}
1416
1417static void sysc_clk_enable_quirk_i2c(struct sysc *ddata)
1418{
1419 sysc_clk_quirk_i2c(ddata, true);
1420}
1421
1422static void sysc_clk_disable_quirk_i2c(struct sysc *ddata)
1423{
1424 sysc_clk_quirk_i2c(ddata, false);
1425}
1426
1427
1428static void sysc_reset_done_quirk_wdt(struct sysc *ddata)
1429{
1430 int wps, spr, error;
1431 u32 val;
1432
1433 wps = 0x34;
1434 spr = 0x48;
1435
1436 sysc_write(ddata, spr, 0xaaaa);
1437 error = readl_poll_timeout(ddata->module_va + wps, val,
1438 !(val & 0x10), 100,
1439 MAX_MODULE_SOFTRESET_WAIT);
1440 if (error)
1441 dev_warn(ddata->dev, "wdt disable spr failed\n");
1442
1443 sysc_write(ddata, wps, 0x5555);
1444 error = readl_poll_timeout(ddata->module_va + wps, val,
1445 !(val & 0x10), 100,
1446 MAX_MODULE_SOFTRESET_WAIT);
1447 if (error)
1448 dev_warn(ddata->dev, "wdt disable wps failed\n");
1449}
1450
1451static void sysc_init_module_quirks(struct sysc *ddata)
1452{
1453 if (ddata->legacy_mode || !ddata->name)
1454 return;
1455
1456 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_HDQ1W) {
1457 ddata->clk_enable_quirk = sysc_clk_enable_quirk_hdq1w;
1458
1459 return;
1460 }
1461
1462 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_I2C) {
1463 ddata->clk_enable_quirk = sysc_clk_enable_quirk_i2c;
1464 ddata->clk_disable_quirk = sysc_clk_disable_quirk_i2c;
1465
1466 return;
1467 }
1468
1469 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT)
1470 ddata->reset_done_quirk = sysc_reset_done_quirk_wdt;
1471}
1472
1473static int sysc_clockdomain_init(struct sysc *ddata)
1474{
1475 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
1476 struct clk *fck = NULL, *ick = NULL;
1477 int error;
1478
1479 if (!pdata || !pdata->init_clockdomain)
1480 return 0;
1481
1482 switch (ddata->nr_clocks) {
1483 case 2:
1484 ick = ddata->clocks[SYSC_ICK];
1485
1486 case 1:
1487 fck = ddata->clocks[SYSC_FCK];
1488 break;
1489 case 0:
1490 return 0;
1491 }
1492
1493 error = pdata->init_clockdomain(ddata->dev, fck, ick, &ddata->cookie);
1494 if (!error || error == -ENODEV)
1495 return 0;
1496
1497 return error;
1498}
1499
1500
1501
1502
1503
1504
1505static int sysc_legacy_init(struct sysc *ddata)
1506{
1507 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
1508 int error;
1509
1510 if (!pdata || !pdata->init_module)
1511 return 0;
1512
1513 error = pdata->init_module(ddata->dev, ddata->mdata, &ddata->cookie);
1514 if (error == -EEXIST)
1515 error = 0;
1516
1517 return error;
1518}
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
1534{
1535 int error, val;
1536
1537 if (!ddata->rsts)
1538 return 0;
1539
1540 if (reset) {
1541 error = reset_control_assert(ddata->rsts);
1542 if (error)
1543 return error;
1544 }
1545
1546 error = reset_control_deassert(ddata->rsts);
1547 if (error == -EEXIST)
1548 return 0;
1549
1550 error = readx_poll_timeout(reset_control_status, ddata->rsts, val,
1551 val == 0, 100, MAX_MODULE_SOFTRESET_WAIT);
1552
1553 return error;
1554}
1555
1556
1557
1558
1559
1560static int sysc_reset(struct sysc *ddata)
1561{
1562 int sysc_offset, syss_offset, sysc_val, rstval, quirks, error = 0;
1563 u32 sysc_mask, syss_done;
1564
1565 sysc_offset = ddata->offsets[SYSC_SYSCONFIG];
1566 syss_offset = ddata->offsets[SYSC_SYSSTATUS];
1567 quirks = ddata->cfg.quirks;
1568
1569 if (ddata->legacy_mode || sysc_offset < 0 ||
1570 ddata->cap->regbits->srst_shift < 0 ||
1571 ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
1572 return 0;
1573
1574 sysc_mask = BIT(ddata->cap->regbits->srst_shift);
1575
1576 if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED)
1577 syss_done = 0;
1578 else
1579 syss_done = ddata->cfg.syss_mask;
1580
1581 if (ddata->clk_disable_quirk)
1582 ddata->clk_disable_quirk(ddata);
1583
1584 sysc_val = sysc_read_sysconfig(ddata);
1585 sysc_val |= sysc_mask;
1586 sysc_write(ddata, sysc_offset, sysc_val);
1587
1588 if (ddata->clk_enable_quirk)
1589 ddata->clk_enable_quirk(ddata);
1590
1591
1592 if (syss_offset >= 0) {
1593 error = readx_poll_timeout(sysc_read_sysstatus, ddata, rstval,
1594 (rstval & ddata->cfg.syss_mask) ==
1595 syss_done,
1596 100, MAX_MODULE_SOFTRESET_WAIT);
1597
1598 } else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
1599 error = readx_poll_timeout(sysc_read_sysconfig, ddata, rstval,
1600 !(rstval & sysc_mask),
1601 100, MAX_MODULE_SOFTRESET_WAIT);
1602 }
1603
1604 if (ddata->reset_done_quirk)
1605 ddata->reset_done_quirk(ddata);
1606
1607 return error;
1608}
1609
1610
1611
1612
1613
1614
1615
1616static int sysc_init_module(struct sysc *ddata)
1617{
1618 int error = 0;
1619 bool manage_clocks = true;
1620
1621 error = sysc_rstctrl_reset_deassert(ddata, false);
1622 if (error)
1623 return error;
1624
1625 if (ddata->cfg.quirks &
1626 (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))
1627 manage_clocks = false;
1628
1629 error = sysc_clockdomain_init(ddata);
1630 if (error)
1631 return error;
1632
1633 if (manage_clocks) {
1634 sysc_clkdm_deny_idle(ddata);
1635
1636 error = sysc_enable_opt_clocks(ddata);
1637 if (error)
1638 return error;
1639
1640 error = sysc_enable_main_clocks(ddata);
1641 if (error)
1642 goto err_opt_clocks;
1643 }
1644
1645 if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) {
1646 error = sysc_rstctrl_reset_deassert(ddata, true);
1647 if (error)
1648 goto err_main_clocks;
1649 }
1650
1651 ddata->revision = sysc_read_revision(ddata);
1652 sysc_init_revision_quirks(ddata);
1653 sysc_init_module_quirks(ddata);
1654
1655 if (ddata->legacy_mode) {
1656 error = sysc_legacy_init(ddata);
1657 if (error)
1658 goto err_main_clocks;
1659 }
1660
1661 if (!ddata->legacy_mode && manage_clocks) {
1662 error = sysc_enable_module(ddata->dev);
1663 if (error)
1664 goto err_main_clocks;
1665 }
1666
1667 error = sysc_reset(ddata);
1668 if (error)
1669 dev_err(ddata->dev, "Reset failed with %d\n", error);
1670
1671 if (!ddata->legacy_mode && manage_clocks)
1672 sysc_disable_module(ddata->dev);
1673
1674err_main_clocks:
1675 if (manage_clocks)
1676 sysc_disable_main_clocks(ddata);
1677err_opt_clocks:
1678 if (manage_clocks) {
1679 sysc_disable_opt_clocks(ddata);
1680 sysc_clkdm_allow_idle(ddata);
1681 }
1682
1683 return error;
1684}
1685
1686static int sysc_init_sysc_mask(struct sysc *ddata)
1687{
1688 struct device_node *np = ddata->dev->of_node;
1689 int error;
1690 u32 val;
1691
1692 error = of_property_read_u32(np, "ti,sysc-mask", &val);
1693 if (error)
1694 return 0;
1695
1696 ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
1697
1698 return 0;
1699}
1700
1701static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
1702 const char *name)
1703{
1704 struct device_node *np = ddata->dev->of_node;
1705 struct property *prop;
1706 const __be32 *p;
1707 u32 val;
1708
1709 of_property_for_each_u32(np, name, prop, p, val) {
1710 if (val >= SYSC_NR_IDLEMODES) {
1711 dev_err(ddata->dev, "invalid idlemode: %i\n", val);
1712 return -EINVAL;
1713 }
1714 *idlemodes |= (1 << val);
1715 }
1716
1717 return 0;
1718}
1719
1720static int sysc_init_idlemodes(struct sysc *ddata)
1721{
1722 int error;
1723
1724 error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes,
1725 "ti,sysc-midle");
1726 if (error)
1727 return error;
1728
1729 error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes,
1730 "ti,sysc-sidle");
1731 if (error)
1732 return error;
1733
1734 return 0;
1735}
1736
1737
1738
1739
1740
1741
1742
1743
1744static int sysc_init_syss_mask(struct sysc *ddata)
1745{
1746 struct device_node *np = ddata->dev->of_node;
1747 int error;
1748 u32 val;
1749
1750 error = of_property_read_u32(np, "ti,syss-mask", &val);
1751 if (error) {
1752 if ((ddata->cap->type == TI_SYSC_OMAP4 ||
1753 ddata->cap->type == TI_SYSC_OMAP4_TIMER) &&
1754 (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
1755 ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
1756
1757 return 0;
1758 }
1759
1760 if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
1761 ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
1762
1763 ddata->cfg.syss_mask = val;
1764
1765 return 0;
1766}
1767
1768
1769
1770
1771
1772static int sysc_child_add_named_clock(struct sysc *ddata,
1773 struct device *child,
1774 const char *name)
1775{
1776 struct clk *clk;
1777 struct clk_lookup *l;
1778 int error = 0;
1779
1780 if (!name)
1781 return 0;
1782
1783 clk = clk_get(child, name);
1784 if (!IS_ERR(clk)) {
1785 clk_put(clk);
1786
1787 return -EEXIST;
1788 }
1789
1790 clk = clk_get(ddata->dev, name);
1791 if (IS_ERR(clk))
1792 return -ENODEV;
1793
1794 l = clkdev_create(clk, name, dev_name(child));
1795 if (!l)
1796 error = -ENOMEM;
1797
1798 clk_put(clk);
1799
1800 return error;
1801}
1802
1803static int sysc_child_add_clocks(struct sysc *ddata,
1804 struct device *child)
1805{
1806 int i, error;
1807
1808 for (i = 0; i < ddata->nr_clocks; i++) {
1809 error = sysc_child_add_named_clock(ddata,
1810 child,
1811 ddata->clock_roles[i]);
1812 if (error && error != -EEXIST) {
1813 dev_err(ddata->dev, "could not add child clock %s: %i\n",
1814 ddata->clock_roles[i], error);
1815
1816 return error;
1817 }
1818 }
1819
1820 return 0;
1821}
1822
1823static struct device_type sysc_device_type = {
1824};
1825
1826static struct sysc *sysc_child_to_parent(struct device *dev)
1827{
1828 struct device *parent = dev->parent;
1829
1830 if (!parent || parent->type != &sysc_device_type)
1831 return NULL;
1832
1833 return dev_get_drvdata(parent);
1834}
1835
1836static int __maybe_unused sysc_child_runtime_suspend(struct device *dev)
1837{
1838 struct sysc *ddata;
1839 int error;
1840
1841 ddata = sysc_child_to_parent(dev);
1842
1843 error = pm_generic_runtime_suspend(dev);
1844 if (error)
1845 return error;
1846
1847 if (!ddata->enabled)
1848 return 0;
1849
1850 return sysc_runtime_suspend(ddata->dev);
1851}
1852
1853static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
1854{
1855 struct sysc *ddata;
1856 int error;
1857
1858 ddata = sysc_child_to_parent(dev);
1859
1860 if (!ddata->enabled) {
1861 error = sysc_runtime_resume(ddata->dev);
1862 if (error < 0)
1863 dev_err(ddata->dev,
1864 "%s error: %i\n", __func__, error);
1865 }
1866
1867 return pm_generic_runtime_resume(dev);
1868}
1869
1870#ifdef CONFIG_PM_SLEEP
1871static int sysc_child_suspend_noirq(struct device *dev)
1872{
1873 struct sysc *ddata;
1874 int error;
1875
1876 ddata = sysc_child_to_parent(dev);
1877
1878 dev_dbg(ddata->dev, "%s %s\n", __func__,
1879 ddata->name ? ddata->name : "");
1880
1881 error = pm_generic_suspend_noirq(dev);
1882 if (error) {
1883 dev_err(dev, "%s error at %i: %i\n",
1884 __func__, __LINE__, error);
1885
1886 return error;
1887 }
1888
1889 if (!pm_runtime_status_suspended(dev)) {
1890 error = pm_generic_runtime_suspend(dev);
1891 if (error) {
1892 dev_dbg(dev, "%s busy at %i: %i\n",
1893 __func__, __LINE__, error);
1894
1895 return 0;
1896 }
1897
1898 error = sysc_runtime_suspend(ddata->dev);
1899 if (error) {
1900 dev_err(dev, "%s error at %i: %i\n",
1901 __func__, __LINE__, error);
1902
1903 return error;
1904 }
1905
1906 ddata->child_needs_resume = true;
1907 }
1908
1909 return 0;
1910}
1911
1912static int sysc_child_resume_noirq(struct device *dev)
1913{
1914 struct sysc *ddata;
1915 int error;
1916
1917 ddata = sysc_child_to_parent(dev);
1918
1919 dev_dbg(ddata->dev, "%s %s\n", __func__,
1920 ddata->name ? ddata->name : "");
1921
1922 if (ddata->child_needs_resume) {
1923 ddata->child_needs_resume = false;
1924
1925 error = sysc_runtime_resume(ddata->dev);
1926 if (error)
1927 dev_err(ddata->dev,
1928 "%s runtime resume error: %i\n",
1929 __func__, error);
1930
1931 error = pm_generic_runtime_resume(dev);
1932 if (error)
1933 dev_err(ddata->dev,
1934 "%s generic runtime resume: %i\n",
1935 __func__, error);
1936 }
1937
1938 return pm_generic_resume_noirq(dev);
1939}
1940#endif
1941
1942static struct dev_pm_domain sysc_child_pm_domain = {
1943 .ops = {
1944 SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
1945 sysc_child_runtime_resume,
1946 NULL)
1947 USE_PLATFORM_PM_SLEEP_OPS
1948 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
1949 sysc_child_resume_noirq)
1950 }
1951};
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
1967{
1968 if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
1969 dev_pm_domain_set(child, &sysc_child_pm_domain);
1970}
1971
1972static int sysc_notifier_call(struct notifier_block *nb,
1973 unsigned long event, void *device)
1974{
1975 struct device *dev = device;
1976 struct sysc *ddata;
1977 int error;
1978
1979 ddata = sysc_child_to_parent(dev);
1980 if (!ddata)
1981 return NOTIFY_DONE;
1982
1983 switch (event) {
1984 case BUS_NOTIFY_ADD_DEVICE:
1985 error = sysc_child_add_clocks(ddata, dev);
1986 if (error)
1987 return error;
1988 sysc_legacy_idle_quirk(ddata, dev);
1989 break;
1990 default:
1991 break;
1992 }
1993
1994 return NOTIFY_DONE;
1995}
1996
1997static struct notifier_block sysc_nb = {
1998 .notifier_call = sysc_notifier_call,
1999};
2000
2001
2002struct sysc_dts_quirk {
2003 const char *name;
2004 u32 mask;
2005};
2006
2007static const struct sysc_dts_quirk sysc_dts_quirks[] = {
2008 { .name = "ti,no-idle-on-init",
2009 .mask = SYSC_QUIRK_NO_IDLE_ON_INIT, },
2010 { .name = "ti,no-reset-on-init",
2011 .mask = SYSC_QUIRK_NO_RESET_ON_INIT, },
2012 { .name = "ti,no-idle",
2013 .mask = SYSC_QUIRK_NO_IDLE, },
2014};
2015
2016static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
2017 bool is_child)
2018{
2019 const struct property *prop;
2020 int i, len;
2021
2022 for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
2023 const char *name = sysc_dts_quirks[i].name;
2024
2025 prop = of_get_property(np, name, &len);
2026 if (!prop)
2027 continue;
2028
2029 ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
2030 if (is_child) {
2031 dev_warn(ddata->dev,
2032 "dts flag should be at module level for %s\n",
2033 name);
2034 }
2035 }
2036}
2037
2038static int sysc_init_dts_quirks(struct sysc *ddata)
2039{
2040 struct device_node *np = ddata->dev->of_node;
2041 int error;
2042 u32 val;
2043
2044 ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL);
2045
2046 sysc_parse_dts_quirks(ddata, np, false);
2047 error = of_property_read_u32(np, "ti,sysc-delay-us", &val);
2048 if (!error) {
2049 if (val > 255) {
2050 dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n",
2051 val);
2052 }
2053
2054 ddata->cfg.srst_udelay = (u8)val;
2055 }
2056
2057 return 0;
2058}
2059
2060static void sysc_unprepare(struct sysc *ddata)
2061{
2062 int i;
2063
2064 if (!ddata->clocks)
2065 return;
2066
2067 for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
2068 if (!IS_ERR_OR_NULL(ddata->clocks[i]))
2069 clk_unprepare(ddata->clocks[i]);
2070 }
2071}
2072
2073
2074
2075
2076static const struct sysc_regbits sysc_regbits_omap2 = {
2077 .dmadisable_shift = -ENODEV,
2078 .midle_shift = 12,
2079 .sidle_shift = 3,
2080 .clkact_shift = 8,
2081 .emufree_shift = 5,
2082 .enwkup_shift = 2,
2083 .srst_shift = 1,
2084 .autoidle_shift = 0,
2085};
2086
2087static const struct sysc_capabilities sysc_omap2 = {
2088 .type = TI_SYSC_OMAP2,
2089 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
2090 SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
2091 SYSC_OMAP2_AUTOIDLE,
2092 .regbits = &sysc_regbits_omap2,
2093};
2094
2095
2096static const struct sysc_capabilities sysc_omap2_timer = {
2097 .type = TI_SYSC_OMAP2_TIMER,
2098 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
2099 SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
2100 SYSC_OMAP2_AUTOIDLE,
2101 .regbits = &sysc_regbits_omap2,
2102 .mod_quirks = SYSC_QUIRK_USE_CLOCKACT,
2103};
2104
2105
2106
2107
2108
2109static const struct sysc_regbits sysc_regbits_omap3_sham = {
2110 .dmadisable_shift = -ENODEV,
2111 .midle_shift = -ENODEV,
2112 .sidle_shift = 4,
2113 .clkact_shift = -ENODEV,
2114 .enwkup_shift = -ENODEV,
2115 .srst_shift = 1,
2116 .autoidle_shift = 0,
2117 .emufree_shift = -ENODEV,
2118};
2119
2120static const struct sysc_capabilities sysc_omap3_sham = {
2121 .type = TI_SYSC_OMAP3_SHAM,
2122 .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
2123 .regbits = &sysc_regbits_omap3_sham,
2124};
2125
2126
2127
2128
2129
2130static const struct sysc_regbits sysc_regbits_omap3_aes = {
2131 .dmadisable_shift = -ENODEV,
2132 .midle_shift = -ENODEV,
2133 .sidle_shift = 6,
2134 .clkact_shift = -ENODEV,
2135 .enwkup_shift = -ENODEV,
2136 .srst_shift = 1,
2137 .autoidle_shift = 0,
2138 .emufree_shift = -ENODEV,
2139};
2140
2141static const struct sysc_capabilities sysc_omap3_aes = {
2142 .type = TI_SYSC_OMAP3_AES,
2143 .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
2144 .regbits = &sysc_regbits_omap3_aes,
2145};
2146
2147
2148
2149
2150static const struct sysc_regbits sysc_regbits_omap4 = {
2151 .dmadisable_shift = 16,
2152 .midle_shift = 4,
2153 .sidle_shift = 2,
2154 .clkact_shift = -ENODEV,
2155 .enwkup_shift = -ENODEV,
2156 .emufree_shift = 1,
2157 .srst_shift = 0,
2158 .autoidle_shift = -ENODEV,
2159};
2160
2161static const struct sysc_capabilities sysc_omap4 = {
2162 .type = TI_SYSC_OMAP4,
2163 .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
2164 SYSC_OMAP4_SOFTRESET,
2165 .regbits = &sysc_regbits_omap4,
2166};
2167
2168static const struct sysc_capabilities sysc_omap4_timer = {
2169 .type = TI_SYSC_OMAP4_TIMER,
2170 .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
2171 SYSC_OMAP4_SOFTRESET,
2172 .regbits = &sysc_regbits_omap4,
2173};
2174
2175
2176
2177
2178static const struct sysc_regbits sysc_regbits_omap4_simple = {
2179 .dmadisable_shift = -ENODEV,
2180 .midle_shift = 2,
2181 .sidle_shift = 0,
2182 .clkact_shift = -ENODEV,
2183 .enwkup_shift = -ENODEV,
2184 .srst_shift = -ENODEV,
2185 .emufree_shift = -ENODEV,
2186 .autoidle_shift = -ENODEV,
2187};
2188
2189static const struct sysc_capabilities sysc_omap4_simple = {
2190 .type = TI_SYSC_OMAP4_SIMPLE,
2191 .regbits = &sysc_regbits_omap4_simple,
2192};
2193
2194
2195
2196
2197static const struct sysc_regbits sysc_regbits_omap34xx_sr = {
2198 .dmadisable_shift = -ENODEV,
2199 .midle_shift = -ENODEV,
2200 .sidle_shift = -ENODEV,
2201 .clkact_shift = 20,
2202 .enwkup_shift = -ENODEV,
2203 .srst_shift = -ENODEV,
2204 .emufree_shift = -ENODEV,
2205 .autoidle_shift = -ENODEV,
2206};
2207
2208static const struct sysc_capabilities sysc_34xx_sr = {
2209 .type = TI_SYSC_OMAP34XX_SR,
2210 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
2211 .regbits = &sysc_regbits_omap34xx_sr,
2212 .mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
2213 SYSC_QUIRK_LEGACY_IDLE,
2214};
2215
2216
2217
2218
2219static const struct sysc_regbits sysc_regbits_omap36xx_sr = {
2220 .dmadisable_shift = -ENODEV,
2221 .midle_shift = -ENODEV,
2222 .sidle_shift = 24,
2223 .clkact_shift = -ENODEV,
2224 .enwkup_shift = 26,
2225 .srst_shift = -ENODEV,
2226 .emufree_shift = -ENODEV,
2227 .autoidle_shift = -ENODEV,
2228};
2229
2230static const struct sysc_capabilities sysc_36xx_sr = {
2231 .type = TI_SYSC_OMAP36XX_SR,
2232 .sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
2233 .regbits = &sysc_regbits_omap36xx_sr,
2234 .mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
2235};
2236
2237static const struct sysc_capabilities sysc_omap4_sr = {
2238 .type = TI_SYSC_OMAP4_SR,
2239 .regbits = &sysc_regbits_omap36xx_sr,
2240 .mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
2241};
2242
2243
2244
2245
2246static const struct sysc_regbits sysc_regbits_omap4_mcasp = {
2247 .dmadisable_shift = -ENODEV,
2248 .midle_shift = -ENODEV,
2249 .sidle_shift = 0,
2250 .clkact_shift = -ENODEV,
2251 .enwkup_shift = -ENODEV,
2252 .srst_shift = -ENODEV,
2253 .emufree_shift = -ENODEV,
2254 .autoidle_shift = -ENODEV,
2255};
2256
2257static const struct sysc_capabilities sysc_omap4_mcasp = {
2258 .type = TI_SYSC_OMAP4_MCASP,
2259 .regbits = &sysc_regbits_omap4_mcasp,
2260 .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
2261};
2262
2263
2264
2265
2266static const struct sysc_capabilities sysc_dra7_mcasp = {
2267 .type = TI_SYSC_OMAP4_SIMPLE,
2268 .regbits = &sysc_regbits_omap4_simple,
2269 .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
2270};
2271
2272
2273
2274
2275static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = {
2276 .dmadisable_shift = -ENODEV,
2277 .midle_shift = -ENODEV,
2278 .sidle_shift = 24,
2279 .clkact_shift = -ENODEV,
2280 .enwkup_shift = 26,
2281 .srst_shift = -ENODEV,
2282 .emufree_shift = -ENODEV,
2283 .autoidle_shift = -ENODEV,
2284};
2285
2286static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
2287 .type = TI_SYSC_OMAP4_USB_HOST_FS,
2288 .sysc_mask = SYSC_OMAP2_ENAWAKEUP,
2289 .regbits = &sysc_regbits_omap4_usb_host_fs,
2290};
2291
2292static const struct sysc_regbits sysc_regbits_dra7_mcan = {
2293 .dmadisable_shift = -ENODEV,
2294 .midle_shift = -ENODEV,
2295 .sidle_shift = -ENODEV,
2296 .clkact_shift = -ENODEV,
2297 .enwkup_shift = 4,
2298 .srst_shift = 0,
2299 .emufree_shift = -ENODEV,
2300 .autoidle_shift = -ENODEV,
2301};
2302
2303static const struct sysc_capabilities sysc_dra7_mcan = {
2304 .type = TI_SYSC_DRA7_MCAN,
2305 .sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
2306 .regbits = &sysc_regbits_dra7_mcan,
2307 .mod_quirks = SYSS_QUIRK_RESETDONE_INVERTED,
2308};
2309
2310static int sysc_init_pdata(struct sysc *ddata)
2311{
2312 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
2313 struct ti_sysc_module_data *mdata;
2314
2315 if (!pdata)
2316 return 0;
2317
2318 mdata = devm_kzalloc(ddata->dev, sizeof(*mdata), GFP_KERNEL);
2319 if (!mdata)
2320 return -ENOMEM;
2321
2322 if (ddata->legacy_mode) {
2323 mdata->name = ddata->legacy_mode;
2324 mdata->module_pa = ddata->module_pa;
2325 mdata->module_size = ddata->module_size;
2326 mdata->offsets = ddata->offsets;
2327 mdata->nr_offsets = SYSC_MAX_REGS;
2328 mdata->cap = ddata->cap;
2329 mdata->cfg = &ddata->cfg;
2330 }
2331
2332 ddata->mdata = mdata;
2333
2334 return 0;
2335}
2336
2337static int sysc_init_match(struct sysc *ddata)
2338{
2339 const struct sysc_capabilities *cap;
2340
2341 cap = of_device_get_match_data(ddata->dev);
2342 if (!cap)
2343 return -EINVAL;
2344
2345 ddata->cap = cap;
2346 if (ddata->cap)
2347 ddata->cfg.quirks |= ddata->cap->mod_quirks;
2348
2349 return 0;
2350}
2351
2352static void ti_sysc_idle(struct work_struct *work)
2353{
2354 struct sysc *ddata;
2355
2356 ddata = container_of(work, struct sysc, idle_work.work);
2357
2358 if (pm_runtime_active(ddata->dev))
2359 pm_runtime_put_sync(ddata->dev);
2360}
2361
2362static const struct of_device_id sysc_match_table[] = {
2363 { .compatible = "simple-bus", },
2364 { },
2365};
2366
2367static int sysc_probe(struct platform_device *pdev)
2368{
2369 struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev);
2370 struct sysc *ddata;
2371 int error;
2372
2373 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
2374 if (!ddata)
2375 return -ENOMEM;
2376
2377 ddata->dev = &pdev->dev;
2378 platform_set_drvdata(pdev, ddata);
2379
2380 error = sysc_init_match(ddata);
2381 if (error)
2382 return error;
2383
2384 error = sysc_init_dts_quirks(ddata);
2385 if (error)
2386 return error;
2387
2388 error = sysc_map_and_check_registers(ddata);
2389 if (error)
2390 return error;
2391
2392 error = sysc_init_sysc_mask(ddata);
2393 if (error)
2394 return error;
2395
2396 error = sysc_init_idlemodes(ddata);
2397 if (error)
2398 return error;
2399
2400 error = sysc_init_syss_mask(ddata);
2401 if (error)
2402 return error;
2403
2404 error = sysc_init_pdata(ddata);
2405 if (error)
2406 return error;
2407
2408 sysc_init_early_quirks(ddata);
2409
2410 error = sysc_get_clocks(ddata);
2411 if (error)
2412 return error;
2413
2414 error = sysc_init_resets(ddata);
2415 if (error)
2416 goto unprepare;
2417
2418 error = sysc_init_module(ddata);
2419 if (error)
2420 goto unprepare;
2421
2422 pm_runtime_enable(ddata->dev);
2423 error = pm_runtime_get_sync(ddata->dev);
2424 if (error < 0) {
2425 pm_runtime_put_noidle(ddata->dev);
2426 pm_runtime_disable(ddata->dev);
2427 goto unprepare;
2428 }
2429
2430 sysc_show_registers(ddata);
2431
2432 ddata->dev->type = &sysc_device_type;
2433 error = of_platform_populate(ddata->dev->of_node, sysc_match_table,
2434 pdata ? pdata->auxdata : NULL,
2435 ddata->dev);
2436 if (error)
2437 goto err;
2438
2439 INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle);
2440
2441
2442 if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE_ON_INIT |
2443 SYSC_QUIRK_NO_RESET_ON_INIT)) {
2444 schedule_delayed_work(&ddata->idle_work, 3000);
2445 } else {
2446 pm_runtime_put(&pdev->dev);
2447 }
2448
2449 if (!of_get_available_child_count(ddata->dev->of_node))
2450 ddata->disable_on_idle = true;
2451
2452 return 0;
2453
2454err:
2455 pm_runtime_put_sync(&pdev->dev);
2456 pm_runtime_disable(&pdev->dev);
2457unprepare:
2458 sysc_unprepare(ddata);
2459
2460 return error;
2461}
2462
2463static int sysc_remove(struct platform_device *pdev)
2464{
2465 struct sysc *ddata = platform_get_drvdata(pdev);
2466 int error;
2467
2468 cancel_delayed_work_sync(&ddata->idle_work);
2469
2470 error = pm_runtime_get_sync(ddata->dev);
2471 if (error < 0) {
2472 pm_runtime_put_noidle(ddata->dev);
2473 pm_runtime_disable(ddata->dev);
2474 goto unprepare;
2475 }
2476
2477 of_platform_depopulate(&pdev->dev);
2478
2479 pm_runtime_put_sync(&pdev->dev);
2480 pm_runtime_disable(&pdev->dev);
2481 reset_control_assert(ddata->rsts);
2482
2483unprepare:
2484 sysc_unprepare(ddata);
2485
2486 return 0;
2487}
2488
2489static const struct of_device_id sysc_match[] = {
2490 { .compatible = "ti,sysc-omap2", .data = &sysc_omap2, },
2491 { .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, },
2492 { .compatible = "ti,sysc-omap4", .data = &sysc_omap4, },
2493 { .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, },
2494 { .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, },
2495 { .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, },
2496 { .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, },
2497 { .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, },
2498 { .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, },
2499 { .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, },
2500 { .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
2501 { .compatible = "ti,sysc-dra7-mcasp", .data = &sysc_dra7_mcasp, },
2502 { .compatible = "ti,sysc-usb-host-fs",
2503 .data = &sysc_omap4_usb_host_fs, },
2504 { .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
2505 { },
2506};
2507MODULE_DEVICE_TABLE(of, sysc_match);
2508
2509static struct platform_driver sysc_driver = {
2510 .probe = sysc_probe,
2511 .remove = sysc_remove,
2512 .driver = {
2513 .name = "ti-sysc",
2514 .of_match_table = sysc_match,
2515 .pm = &sysc_pm_ops,
2516 },
2517};
2518
2519static int __init sysc_init(void)
2520{
2521 bus_register_notifier(&platform_bus_type, &sysc_nb);
2522
2523 return platform_driver_register(&sysc_driver);
2524}
2525module_init(sysc_init);
2526
2527static void __exit sysc_exit(void)
2528{
2529 bus_unregister_notifier(&platform_bus_type, &sysc_nb);
2530 platform_driver_unregister(&sysc_driver);
2531}
2532module_exit(sysc_exit);
2533
2534MODULE_DESCRIPTION("TI sysc interconnect target driver");
2535MODULE_LICENSE("GPL v2");
2536
