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io_uring: ensure finish_wait() is always called in __io_uring_task_cancel()
[linux/fpc-iii.git] / drivers / bus / ti-sysc.c
bloba27d751cf219d7215216b41577c19ed4331885c7
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * ti-sysc.c - Texas Instruments sysc interconnect target driver
4 */
5
6 #include <linux/io.h>
7 #include <linux/clk.h>
8 #include <linux/clkdev.h>
9 #include <linux/delay.h>
10 #include <linux/list.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/pm_domain.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/reset.h>
16 #include <linux/of_address.h>
17 #include <linux/of_platform.h>
18 #include <linux/slab.h>
19 #include <linux/sys_soc.h>
20 #include <linux/iopoll.h>
21
22 #include <linux/platform_data/ti-sysc.h>
23
24 #include <dt-bindings/bus/ti-sysc.h>
25
26 #define DIS_ISP BIT(2)
27 #define DIS_IVA BIT(1)
28 #define DIS_SGX BIT(0)
29
30 #define SOC_FLAG(match, flag) { .machine = match, .data = (void *)(flag), }
31
32 #define MAX_MODULE_SOFTRESET_WAIT 10000
33
34 enum sysc_soc {
35 SOC_UNKNOWN,
36 SOC_2420,
37 SOC_2430,
38 SOC_3430,
39 SOC_3630,
40 SOC_4430,
41 SOC_4460,
42 SOC_4470,
43 SOC_5430,
44 SOC_AM3,
45 SOC_AM4,
46 SOC_DRA7,
47 };
48
49 struct sysc_address {
50 unsigned long base;
51 struct list_head node;
52 };
53
54 struct sysc_soc_info {
55 unsigned long general_purpose:1;
56 enum sysc_soc soc;
57 struct mutex list_lock; /* disabled modules list lock */
58 struct list_head disabled_modules;
59 };
60
61 enum sysc_clocks {
62 SYSC_FCK,
63 SYSC_ICK,
64 SYSC_OPTFCK0,
65 SYSC_OPTFCK1,
66 SYSC_OPTFCK2,
67 SYSC_OPTFCK3,
68 SYSC_OPTFCK4,
69 SYSC_OPTFCK5,
70 SYSC_OPTFCK6,
71 SYSC_OPTFCK7,
72 SYSC_MAX_CLOCKS,
73 };
74
75 static struct sysc_soc_info *sysc_soc;
76 static const char * const reg_names[] = { "rev", "sysc", "syss", };
77 static const char * const clock_names[SYSC_MAX_CLOCKS] = {
78 "fck", "ick", "opt0", "opt1", "opt2", "opt3", "opt4",
79 "opt5", "opt6", "opt7",
80 };
81
82 #define SYSC_IDLEMODE_MASK 3
83 #define SYSC_CLOCKACTIVITY_MASK 3
84
85 /**
86 * struct sysc - TI sysc interconnect target module registers and capabilities
87 * @dev: struct device pointer
88 * @module_pa: physical address of the interconnect target module
89 * @module_size: size of the interconnect target module
90 * @module_va: virtual address of the interconnect target module
91 * @offsets: register offsets from module base
92 * @mdata: ti-sysc to hwmod translation data for a module
93 * @clocks: clocks used by the interconnect target module
94 * @clock_roles: clock role names for the found clocks
95 * @nr_clocks: number of clocks used by the interconnect target module
96 * @rsts: resets used by the interconnect target module
97 * @legacy_mode: configured for legacy mode if set
98 * @cap: interconnect target module capabilities
99 * @cfg: interconnect target module configuration
100 * @cookie: data used by legacy platform callbacks
101 * @name: name if available
102 * @revision: interconnect target module revision
103 * @enabled: sysc runtime enabled status
104 * @needs_resume: runtime resume needed on resume from suspend
105 * @child_needs_resume: runtime resume needed for child on resume from suspend
106 * @disable_on_idle: status flag used for disabling modules with resets
107 * @idle_work: work structure used to perform delayed idle on a module
108 * @pre_reset_quirk: module specific pre-reset quirk
109 * @post_reset_quirk: module specific post-reset quirk
110 * @reset_done_quirk: module specific reset done quirk
111 * @module_enable_quirk: module specific enable quirk
112 * @module_disable_quirk: module specific disable quirk
113 * @module_unlock_quirk: module specific sysconfig unlock quirk
114 * @module_lock_quirk: module specific sysconfig lock quirk
115 */
116 struct sysc {
117 struct device *dev;
118 u64 module_pa;
119 u32 module_size;
120 void __iomem *module_va;
121 int offsets[SYSC_MAX_REGS];
122 struct ti_sysc_module_data *mdata;
123 struct clk **clocks;
124 const char **clock_roles;
125 int nr_clocks;
126 struct reset_control *rsts;
127 const char *legacy_mode;
128 const struct sysc_capabilities *cap;
129 struct sysc_config cfg;
130 struct ti_sysc_cookie cookie;
131 const char *name;
132 u32 revision;
133 unsigned int enabled:1;
134 unsigned int needs_resume:1;
135 unsigned int child_needs_resume:1;
136 struct delayed_work idle_work;
137 void (*pre_reset_quirk)(struct sysc *sysc);
138 void (*post_reset_quirk)(struct sysc *sysc);
139 void (*reset_done_quirk)(struct sysc *sysc);
140 void (*module_enable_quirk)(struct sysc *sysc);
141 void (*module_disable_quirk)(struct sysc *sysc);
142 void (*module_unlock_quirk)(struct sysc *sysc);
143 void (*module_lock_quirk)(struct sysc *sysc);
144 };
145
146 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
147 bool is_child);
148
149 static void sysc_write(struct sysc *ddata, int offset, u32 value)
150 {
151 if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
152 writew_relaxed(value & 0xffff, ddata->module_va + offset);
153
154 /* Only i2c revision has LO and HI register with stride of 4 */
155 if (ddata->offsets[SYSC_REVISION] >= 0 &&
156 offset == ddata->offsets[SYSC_REVISION]) {
157 u16 hi = value >> 16;
158
159 writew_relaxed(hi, ddata->module_va + offset + 4);
160 }
161
162 return;
163 }
164
165 writel_relaxed(value, ddata->module_va + offset);
166 }
167
168 static u32 sysc_read(struct sysc *ddata, int offset)
169 {
170 if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
171 u32 val;
172
173 val = readw_relaxed(ddata->module_va + offset);
174
175 /* Only i2c revision has LO and HI register with stride of 4 */
176 if (ddata->offsets[SYSC_REVISION] >= 0 &&
177 offset == ddata->offsets[SYSC_REVISION]) {
178 u16 tmp = readw_relaxed(ddata->module_va + offset + 4);
179
180 val |= tmp << 16;
181 }
182
183 return val;
184 }
185
186 return readl_relaxed(ddata->module_va + offset);
187 }
188
189 static bool sysc_opt_clks_needed(struct sysc *ddata)
190 {
191 return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
192 }
193
194 static u32 sysc_read_revision(struct sysc *ddata)
195 {
196 int offset = ddata->offsets[SYSC_REVISION];
197
198 if (offset < 0)
199 return 0;
200
201 return sysc_read(ddata, offset);
202 }
203
204 static u32 sysc_read_sysconfig(struct sysc *ddata)
205 {
206 int offset = ddata->offsets[SYSC_SYSCONFIG];
207
208 if (offset < 0)
209 return 0;
210
211 return sysc_read(ddata, offset);
212 }
213
214 static u32 sysc_read_sysstatus(struct sysc *ddata)
215 {
216 int offset = ddata->offsets[SYSC_SYSSTATUS];
217
218 if (offset < 0)
219 return 0;
220
221 return sysc_read(ddata, offset);
222 }
223
224 /* Poll on reset status */
225 static int sysc_wait_softreset(struct sysc *ddata)
226 {
227 u32 sysc_mask, syss_done, rstval;
228 int syss_offset, error = 0;
229
230 if (ddata->cap->regbits->srst_shift < 0)
231 return 0;
232
233 syss_offset = ddata->offsets[SYSC_SYSSTATUS];
234 sysc_mask = BIT(ddata->cap->regbits->srst_shift);
235
236 if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED)
237 syss_done = 0;
238 else
239 syss_done = ddata->cfg.syss_mask;
240
241 if (syss_offset >= 0) {
242 error = readx_poll_timeout_atomic(sysc_read_sysstatus, ddata,
243 rstval, (rstval & ddata->cfg.syss_mask) ==
244 syss_done, 100, MAX_MODULE_SOFTRESET_WAIT);
245
246 } else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
247 error = readx_poll_timeout_atomic(sysc_read_sysconfig, ddata,
248 rstval, !(rstval & sysc_mask),
249 100, MAX_MODULE_SOFTRESET_WAIT);
250 }
251
252 return error;
253 }
254
255 static int sysc_add_named_clock_from_child(struct sysc *ddata,
256 const char *name,
257 const char *optfck_name)
258 {
259 struct device_node *np = ddata->dev->of_node;
260 struct device_node *child;
261 struct clk_lookup *cl;
262 struct clk *clock;
263 const char *n;
264
265 if (name)
266 n = name;
267 else
268 n = optfck_name;
269
270 /* Does the clock alias already exist? */
271 clock = of_clk_get_by_name(np, n);
272 if (!IS_ERR(clock)) {
273 clk_put(clock);
274
275 return 0;
276 }
277
278 child = of_get_next_available_child(np, NULL);
279 if (!child)
280 return -ENODEV;
281
282 clock = devm_get_clk_from_child(ddata->dev, child, name);
283 if (IS_ERR(clock))
284 return PTR_ERR(clock);
285
286 /*
287 * Use clkdev_add() instead of clkdev_alloc() to avoid the MAX_DEV_ID
288 * limit for clk_get(). If cl ever needs to be freed, it should be done
289 * with clkdev_drop().
290 */
291 cl = kcalloc(1, sizeof(*cl), GFP_KERNEL);
292 if (!cl)
293 return -ENOMEM;
294
295 cl->con_id = n;
296 cl->dev_id = dev_name(ddata->dev);
297 cl->clk = clock;
298 clkdev_add(cl);
299
300 clk_put(clock);
301
302 return 0;
303 }
304
305 static int sysc_init_ext_opt_clock(struct sysc *ddata, const char *name)
306 {
307 const char *optfck_name;
308 int error, index;
309
310 if (ddata->nr_clocks < SYSC_OPTFCK0)
311 index = SYSC_OPTFCK0;
312 else
313 index = ddata->nr_clocks;
314
315 if (name)
316 optfck_name = name;
317 else
318 optfck_name = clock_names[index];
319
320 error = sysc_add_named_clock_from_child(ddata, name, optfck_name);
321 if (error)
322 return error;
323
324 ddata->clock_roles[index] = optfck_name;
325 ddata->nr_clocks++;
326
327 return 0;
328 }
329
330 static int sysc_get_one_clock(struct sysc *ddata, const char *name)
331 {
332 int error, i, index = -ENODEV;
333
334 if (!strncmp(clock_names[SYSC_FCK], name, 3))
335 index = SYSC_FCK;
336 else if (!strncmp(clock_names[SYSC_ICK], name, 3))
337 index = SYSC_ICK;
338
339 if (index < 0) {
340 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
341 if (!ddata->clocks[i]) {
342 index = i;
343 break;
344 }
345 }
346 }
347
348 if (index < 0) {
349 dev_err(ddata->dev, "clock %s not added\n", name);
350 return index;
351 }
352
353 ddata->clocks[index] = devm_clk_get(ddata->dev, name);
354 if (IS_ERR(ddata->clocks[index])) {
355 dev_err(ddata->dev, "clock get error for %s: %li\n",
356 name, PTR_ERR(ddata->clocks[index]));
357
358 return PTR_ERR(ddata->clocks[index]);
359 }
360
361 error = clk_prepare(ddata->clocks[index]);
362 if (error) {
363 dev_err(ddata->dev, "clock prepare error for %s: %i\n",
364 name, error);
365
366 return error;
367 }
368
369 return 0;
370 }
371
372 static int sysc_get_clocks(struct sysc *ddata)
373 {
374 struct device_node *np = ddata->dev->of_node;
375 struct property *prop;
376 const char *name;
377 int nr_fck = 0, nr_ick = 0, i, error = 0;
378
379 ddata->clock_roles = devm_kcalloc(ddata->dev,
380 SYSC_MAX_CLOCKS,
381 sizeof(*ddata->clock_roles),
382 GFP_KERNEL);
383 if (!ddata->clock_roles)
384 return -ENOMEM;
385
386 of_property_for_each_string(np, "clock-names", prop, name) {
387 if (!strncmp(clock_names[SYSC_FCK], name, 3))
388 nr_fck++;
389 if (!strncmp(clock_names[SYSC_ICK], name, 3))
390 nr_ick++;
391 ddata->clock_roles[ddata->nr_clocks] = name;
392 ddata->nr_clocks++;
393 }
394
395 if (ddata->nr_clocks < 1)
396 return 0;
397
398 if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) {
399 error = sysc_init_ext_opt_clock(ddata, NULL);
400 if (error)
401 return error;
402 }
403
404 if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
405 dev_err(ddata->dev, "too many clocks for %pOF\n", np);
406
407 return -EINVAL;
408 }
409
410 if (nr_fck > 1 || nr_ick > 1) {
411 dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
412
413 return -EINVAL;
414 }
415
416 /* Always add a slot for main clocks fck and ick even if unused */
417 if (!nr_fck)
418 ddata->nr_clocks++;
419 if (!nr_ick)
420 ddata->nr_clocks++;
421
422 ddata->clocks = devm_kcalloc(ddata->dev,
423 ddata->nr_clocks, sizeof(*ddata->clocks),
424 GFP_KERNEL);
425 if (!ddata->clocks)
426 return -ENOMEM;
427
428 for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
429 const char *name = ddata->clock_roles[i];
430
431 if (!name)
432 continue;
433
434 error = sysc_get_one_clock(ddata, name);
435 if (error)
436 return error;
437 }
438
439 return 0;
440 }
441
442 static int sysc_enable_main_clocks(struct sysc *ddata)
443 {
444 struct clk *clock;
445 int i, error;
446
447 if (!ddata->clocks)
448 return 0;
449
450 for (i = 0; i < SYSC_OPTFCK0; i++) {
451 clock = ddata->clocks[i];
452
453 /* Main clocks may not have ick */
454 if (IS_ERR_OR_NULL(clock))
455 continue;
456
457 error = clk_enable(clock);
458 if (error)
459 goto err_disable;
460 }
461
462 return 0;
463
464 err_disable:
465 for (i--; i >= 0; i--) {
466 clock = ddata->clocks[i];
467
468 /* Main clocks may not have ick */
469 if (IS_ERR_OR_NULL(clock))
470 continue;
471
472 clk_disable(clock);
473 }
474
475 return error;
476 }
477
478 static void sysc_disable_main_clocks(struct sysc *ddata)
479 {
480 struct clk *clock;
481 int i;
482
483 if (!ddata->clocks)
484 return;
485
486 for (i = 0; i < SYSC_OPTFCK0; i++) {
487 clock = ddata->clocks[i];
488 if (IS_ERR_OR_NULL(clock))
489 continue;
490
491 clk_disable(clock);
492 }
493 }
494
495 static int sysc_enable_opt_clocks(struct sysc *ddata)
496 {
497 struct clk *clock;
498 int i, error;
499
500 if (!ddata->clocks || ddata->nr_clocks < SYSC_OPTFCK0 + 1)
501 return 0;
502
503 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
504 clock = ddata->clocks[i];
505
506 /* Assume no holes for opt clocks */
507 if (IS_ERR_OR_NULL(clock))
508 return 0;
509
510 error = clk_enable(clock);
511 if (error)
512 goto err_disable;
513 }
514
515 return 0;
516
517 err_disable:
518 for (i--; i >= 0; i--) {
519 clock = ddata->clocks[i];
520 if (IS_ERR_OR_NULL(clock))
521 continue;
522
523 clk_disable(clock);
524 }
525
526 return error;
527 }
528
529 static void sysc_disable_opt_clocks(struct sysc *ddata)
530 {
531 struct clk *clock;
532 int i;
533
534 if (!ddata->clocks || ddata->nr_clocks < SYSC_OPTFCK0 + 1)
535 return;
536
537 for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
538 clock = ddata->clocks[i];
539
540 /* Assume no holes for opt clocks */
541 if (IS_ERR_OR_NULL(clock))
542 return;
543
544 clk_disable(clock);
545 }
546 }
547
548 static void sysc_clkdm_deny_idle(struct sysc *ddata)
549 {
550 struct ti_sysc_platform_data *pdata;
551
552 if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
553 return;
554
555 pdata = dev_get_platdata(ddata->dev);
556 if (pdata && pdata->clkdm_deny_idle)
557 pdata->clkdm_deny_idle(ddata->dev, &ddata->cookie);
558 }
559
560 static void sysc_clkdm_allow_idle(struct sysc *ddata)
561 {
562 struct ti_sysc_platform_data *pdata;
563
564 if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
565 return;
566
567 pdata = dev_get_platdata(ddata->dev);
568 if (pdata && pdata->clkdm_allow_idle)
569 pdata->clkdm_allow_idle(ddata->dev, &ddata->cookie);
570 }
571
572 /**
573 * sysc_init_resets - init rstctrl reset line if configured
574 * @ddata: device driver data
575 *
576 * See sysc_rstctrl_reset_deassert().
577 */
578 static int sysc_init_resets(struct sysc *ddata)
579 {
580 ddata->rsts =
581 devm_reset_control_get_optional_shared(ddata->dev, "rstctrl");
582
583 return PTR_ERR_OR_ZERO(ddata->rsts);
584 }
585
586 /**
587 * sysc_parse_and_check_child_range - parses module IO region from ranges
588 * @ddata: device driver data
589 *
590 * In general we only need rev, syss, and sysc registers and not the whole
591 * module range. But we do want the offsets for these registers from the
592 * module base. This allows us to check them against the legacy hwmod
593 * platform data. Let's also check the ranges are configured properly.
594 */
595 static int sysc_parse_and_check_child_range(struct sysc *ddata)
596 {
597 struct device_node *np = ddata->dev->of_node;
598 const __be32 *ranges;
599 u32 nr_addr, nr_size;
600 int len, error;
601
602 ranges = of_get_property(np, "ranges", &len);
603 if (!ranges) {
604 dev_err(ddata->dev, "missing ranges for %pOF\n", np);
605
606 return -ENOENT;
607 }
608
609 len /= sizeof(*ranges);
610
611 if (len < 3) {
612 dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
613
614 return -EINVAL;
615 }
616
617 error = of_property_read_u32(np, "#address-cells", &nr_addr);
618 if (error)
619 return -ENOENT;
620
621 error = of_property_read_u32(np, "#size-cells", &nr_size);
622 if (error)
623 return -ENOENT;
624
625 if (nr_addr != 1 || nr_size != 1) {
626 dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
627
628 return -EINVAL;
629 }
630
631 ranges++;
632 ddata->module_pa = of_translate_address(np, ranges++);
633 ddata->module_size = be32_to_cpup(ranges);
634
635 return 0;
636 }
637
638 static struct device_node *stdout_path;
639
640 static void sysc_init_stdout_path(struct sysc *ddata)
641 {
642 struct device_node *np = NULL;
643 const char *uart;
644
645 if (IS_ERR(stdout_path))
646 return;
647
648 if (stdout_path)
649 return;
650
651 np = of_find_node_by_path("/chosen");
652 if (!np)
653 goto err;
654
655 uart = of_get_property(np, "stdout-path", NULL);
656 if (!uart)
657 goto err;
658
659 np = of_find_node_by_path(uart);
660 if (!np)
661 goto err;
662
663 stdout_path = np;
664
665 return;
666
667 err:
668 stdout_path = ERR_PTR(-ENODEV);
669 }
670
671 static void sysc_check_quirk_stdout(struct sysc *ddata,
672 struct device_node *np)
673 {
674 sysc_init_stdout_path(ddata);
675 if (np != stdout_path)
676 return;
677
678 ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
679 SYSC_QUIRK_NO_RESET_ON_INIT;
680 }
681
682 /**
683 * sysc_check_one_child - check child configuration
684 * @ddata: device driver data
685 * @np: child device node
686 *
687 * Let's avoid messy situations where we have new interconnect target
688 * node but children have "ti,hwmods". These belong to the interconnect
689 * target node and are managed by this driver.
690 */
691 static void sysc_check_one_child(struct sysc *ddata,
692 struct device_node *np)
693 {
694 const char *name;
695
696 name = of_get_property(np, "ti,hwmods", NULL);
697 if (name && !of_device_is_compatible(np, "ti,sysc"))
698 dev_warn(ddata->dev, "really a child ti,hwmods property?");
699
700 sysc_check_quirk_stdout(ddata, np);
701 sysc_parse_dts_quirks(ddata, np, true);
702 }
703
704 static void sysc_check_children(struct sysc *ddata)
705 {
706 struct device_node *child;
707
708 for_each_child_of_node(ddata->dev->of_node, child)
709 sysc_check_one_child(ddata, child);
710 }
711
712 /*
713 * So far only I2C uses 16-bit read access with clockactivity with revision
714 * in two registers with stride of 4. We can detect this based on the rev
715 * register size to configure things far enough to be able to properly read
716 * the revision register.
717 */
718 static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res)
719 {
720 if (resource_size(res) == 8)
721 ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT;
722 }
723
724 /**
725 * sysc_parse_one - parses the interconnect target module registers
726 * @ddata: device driver data
727 * @reg: register to parse
728 */
729 static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg)
730 {
731 struct resource *res;
732 const char *name;
733
734 switch (reg) {
735 case SYSC_REVISION:
736 case SYSC_SYSCONFIG:
737 case SYSC_SYSSTATUS:
738 name = reg_names[reg];
739 break;
740 default:
741 return -EINVAL;
742 }
743
744 res = platform_get_resource_byname(to_platform_device(ddata->dev),
745 IORESOURCE_MEM, name);
746 if (!res) {
747 ddata->offsets[reg] = -ENODEV;
748
749 return 0;
750 }
751
752 ddata->offsets[reg] = res->start - ddata->module_pa;
753 if (reg == SYSC_REVISION)
754 sysc_check_quirk_16bit(ddata, res);
755
756 return 0;
757 }
758
759 static int sysc_parse_registers(struct sysc *ddata)
760 {
761 int i, error;
762
763 for (i = 0; i < SYSC_MAX_REGS; i++) {
764 error = sysc_parse_one(ddata, i);
765 if (error)
766 return error;
767 }
768
769 return 0;
770 }
771
772 /**
773 * sysc_check_registers - check for misconfigured register overlaps
774 * @ddata: device driver data
775 */
776 static int sysc_check_registers(struct sysc *ddata)
777 {
778 int i, j, nr_regs = 0, nr_matches = 0;
779
780 for (i = 0; i < SYSC_MAX_REGS; i++) {
781 if (ddata->offsets[i] < 0)
782 continue;
783
784 if (ddata->offsets[i] > (ddata->module_size - 4)) {
785 dev_err(ddata->dev, "register outside module range");
786
787 return -EINVAL;
788 }
789
790 for (j = 0; j < SYSC_MAX_REGS; j++) {
791 if (ddata->offsets[j] < 0)
792 continue;
793
794 if (ddata->offsets[i] == ddata->offsets[j])
795 nr_matches++;
796 }
797 nr_regs++;
798 }
799
800 if (nr_matches > nr_regs) {
801 dev_err(ddata->dev, "overlapping registers: (%i/%i)",
802 nr_regs, nr_matches);
803
804 return -EINVAL;
805 }
806
807 return 0;
808 }
809
810 /**
811 * syc_ioremap - ioremap register space for the interconnect target module
812 * @ddata: device driver data
813 *
814 * Note that the interconnect target module registers can be anywhere
815 * within the interconnect target module range. For example, SGX has
816 * them at offset 0x1fc00 in the 32MB module address space. And cpsw
817 * has them at offset 0x1200 in the CPSW_WR child. Usually the
818 * the interconnect target module registers are at the beginning of
819 * the module range though.
820 */
821 static int sysc_ioremap(struct sysc *ddata)
822 {
823 int size;
824
825 if (ddata->offsets[SYSC_REVISION] < 0 &&
826 ddata->offsets[SYSC_SYSCONFIG] < 0 &&
827 ddata->offsets[SYSC_SYSSTATUS] < 0) {
828 size = ddata->module_size;
829 } else {
830 size = max3(ddata->offsets[SYSC_REVISION],
831 ddata->offsets[SYSC_SYSCONFIG],
832 ddata->offsets[SYSC_SYSSTATUS]);
833
834 if (size < SZ_1K)
835 size = SZ_1K;
836
837 if ((size + sizeof(u32)) > ddata->module_size)
838 size = ddata->module_size;
839 }
840
841 ddata->module_va = devm_ioremap(ddata->dev,
842 ddata->module_pa,
843 size + sizeof(u32));
844 if (!ddata->module_va)
845 return -EIO;
846
847 return 0;
848 }
849
850 /**
851 * sysc_map_and_check_registers - ioremap and check device registers
852 * @ddata: device driver data
853 */
854 static int sysc_map_and_check_registers(struct sysc *ddata)
855 {
856 struct device_node *np = ddata->dev->of_node;
857 int error;
858
859 if (!of_get_property(np, "reg", NULL))
860 return 0;
861
862 error = sysc_parse_and_check_child_range(ddata);
863 if (error)
864 return error;
865
866 sysc_check_children(ddata);
867
868 error = sysc_parse_registers(ddata);
869 if (error)
870 return error;
871
872 error = sysc_ioremap(ddata);
873 if (error)
874 return error;
875
876 error = sysc_check_registers(ddata);
877 if (error)
878 return error;
879
880 return 0;
881 }
882
883 /**
884 * sysc_show_rev - read and show interconnect target module revision
885 * @bufp: buffer to print the information to
886 * @ddata: device driver data
887 */
888 static int sysc_show_rev(char *bufp, struct sysc *ddata)
889 {
890 int len;
891
892 if (ddata->offsets[SYSC_REVISION] < 0)
893 return sprintf(bufp, ":NA");
894
895 len = sprintf(bufp, ":%08x", ddata->revision);
896
897 return len;
898 }
899
900 static int sysc_show_reg(struct sysc *ddata,
901 char *bufp, enum sysc_registers reg)
902 {
903 if (ddata->offsets[reg] < 0)
904 return sprintf(bufp, ":NA");
905
906 return sprintf(bufp, ":%x", ddata->offsets[reg]);
907 }
908
909 static int sysc_show_name(char *bufp, struct sysc *ddata)
910 {
911 if (!ddata->name)
912 return 0;
913
914 return sprintf(bufp, ":%s", ddata->name);
915 }
916
917 /**
918 * sysc_show_registers - show information about interconnect target module
919 * @ddata: device driver data
920 */
921 static void sysc_show_registers(struct sysc *ddata)
922 {
923 char buf[128];
924 char *bufp = buf;
925 int i;
926
927 for (i = 0; i < SYSC_MAX_REGS; i++)
928 bufp += sysc_show_reg(ddata, bufp, i);
929
930 bufp += sysc_show_rev(bufp, ddata);
931 bufp += sysc_show_name(bufp, ddata);
932
933 dev_dbg(ddata->dev, "%llx:%x%s\n",
934 ddata->module_pa, ddata->module_size,
935 buf);
936 }
937
938 /**
939 * sysc_write_sysconfig - handle sysconfig quirks for register write
940 * @ddata: device driver data
941 * @value: register value
942 */
943 static void sysc_write_sysconfig(struct sysc *ddata, u32 value)
944 {
945 if (ddata->module_unlock_quirk)
946 ddata->module_unlock_quirk(ddata);
947
948 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], value);
949
950 if (ddata->module_lock_quirk)
951 ddata->module_lock_quirk(ddata);
952 }
953
954 #define SYSC_IDLE_MASK (SYSC_NR_IDLEMODES - 1)
955 #define SYSC_CLOCACT_ICK 2
956
957 /* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */
958 static int sysc_enable_module(struct device *dev)
959 {
960 struct sysc *ddata;
961 const struct sysc_regbits *regbits;
962 u32 reg, idlemodes, best_mode;
963 int error;
964
965 ddata = dev_get_drvdata(dev);
966
967 /*
968 * Some modules like DSS reset automatically on idle. Enable optional
969 * reset clocks and wait for OCP softreset to complete.
970 */
971 if (ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_IN_RESET) {
972 error = sysc_enable_opt_clocks(ddata);
973 if (error) {
974 dev_err(ddata->dev,
975 "Optional clocks failed for enable: %i\n",
976 error);
977 return error;
978 }
979 }
980 /*
981 * Some modules like i2c and hdq1w have unusable reset status unless
982 * the module reset quirk is enabled. Skip status check on enable.
983 */
984 if (!(ddata->cfg.quirks & SYSC_MODULE_QUIRK_ENA_RESETDONE)) {
985 error = sysc_wait_softreset(ddata);
986 if (error)
987 dev_warn(ddata->dev, "OCP softreset timed out\n");
988 }
989 if (ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_IN_RESET)
990 sysc_disable_opt_clocks(ddata);
991
992 /*
993 * Some subsystem private interconnects, like DSS top level module,
994 * need only the automatic OCP softreset handling with no sysconfig
995 * register bits to configure.
996 */
997 if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
998 return 0;
999
1000 regbits = ddata->cap->regbits;
1001 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
1002
1003 /*
1004 * Set CLOCKACTIVITY, we only use it for ick. And we only configure it
1005 * based on the SYSC_QUIRK_USE_CLOCKACT flag, not based on the hardware
1006 * capabilities. See the old HWMOD_SET_DEFAULT_CLOCKACT flag.
1007 */
1008 if (regbits->clkact_shift >= 0 &&
1009 (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT))
1010 reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift;
1011
1012 /* Set SIDLE mode */
1013 idlemodes = ddata->cfg.sidlemodes;
1014 if (!idlemodes || regbits->sidle_shift < 0)
1015 goto set_midle;
1016
1017 if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE |
1018 SYSC_QUIRK_SWSUP_SIDLE_ACT)) {
1019 best_mode = SYSC_IDLE_NO;
1020 } else {
1021 best_mode = fls(ddata->cfg.sidlemodes) - 1;
1022 if (best_mode > SYSC_IDLE_MASK) {
1023 dev_err(dev, "%s: invalid sidlemode\n", __func__);
1024 return -EINVAL;
1025 }
1026
1027 /* Set WAKEUP */
1028 if (regbits->enwkup_shift >= 0 &&
1029 ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
1030 reg |= BIT(regbits->enwkup_shift);
1031 }
1032
1033 reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
1034 reg |= best_mode << regbits->sidle_shift;
1035 sysc_write_sysconfig(ddata, reg);
1036
1037 set_midle:
1038 /* Set MIDLE mode */
1039 idlemodes = ddata->cfg.midlemodes;
1040 if (!idlemodes || regbits->midle_shift < 0)
1041 goto set_autoidle;
1042
1043 best_mode = fls(ddata->cfg.midlemodes) - 1;
1044 if (best_mode > SYSC_IDLE_MASK) {
1045 dev_err(dev, "%s: invalid midlemode\n", __func__);
1046 return -EINVAL;
1047 }
1048
1049 if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
1050 best_mode = SYSC_IDLE_NO;
1051
1052 reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
1053 reg |= best_mode << regbits->midle_shift;
1054 sysc_write_sysconfig(ddata, reg);
1055
1056 set_autoidle:
1057 /* Autoidle bit must enabled separately if available */
1058 if (regbits->autoidle_shift >= 0 &&
1059 ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) {
1060 reg |= 1 << regbits->autoidle_shift;
1061 sysc_write_sysconfig(ddata, reg);
1062 }
1063
1064 /* Flush posted write */
1065 sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
1066
1067 if (ddata->module_enable_quirk)
1068 ddata->module_enable_quirk(ddata);
1069
1070 return 0;
1071 }
1072
1073 static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode)
1074 {
1075 if (idlemodes & BIT(SYSC_IDLE_SMART_WKUP))
1076 *best_mode = SYSC_IDLE_SMART_WKUP;
1077 else if (idlemodes & BIT(SYSC_IDLE_SMART))
1078 *best_mode = SYSC_IDLE_SMART;
1079 else if (idlemodes & BIT(SYSC_IDLE_FORCE))
1080 *best_mode = SYSC_IDLE_FORCE;
1081 else
1082 return -EINVAL;
1083
1084 return 0;
1085 }
1086
1087 /* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */
1088 static int sysc_disable_module(struct device *dev)
1089 {
1090 struct sysc *ddata;
1091 const struct sysc_regbits *regbits;
1092 u32 reg, idlemodes, best_mode;
1093 int ret;
1094
1095 ddata = dev_get_drvdata(dev);
1096 if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
1097 return 0;
1098
1099 if (ddata->module_disable_quirk)
1100 ddata->module_disable_quirk(ddata);
1101
1102 regbits = ddata->cap->regbits;
1103 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
1104
1105 /* Set MIDLE mode */
1106 idlemodes = ddata->cfg.midlemodes;
1107 if (!idlemodes || regbits->midle_shift < 0)
1108 goto set_sidle;
1109
1110 ret = sysc_best_idle_mode(idlemodes, &best_mode);
1111 if (ret) {
1112 dev_err(dev, "%s: invalid midlemode\n", __func__);
1113 return ret;
1114 }
1115
1116 if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_MSTANDBY) ||
1117 ddata->cfg.quirks & (SYSC_QUIRK_FORCE_MSTANDBY))
1118 best_mode = SYSC_IDLE_FORCE;
1119
1120 reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
1121 reg |= best_mode << regbits->midle_shift;
1122 sysc_write_sysconfig(ddata, reg);
1123
1124 set_sidle:
1125 /* Set SIDLE mode */
1126 idlemodes = ddata->cfg.sidlemodes;
1127 if (!idlemodes || regbits->sidle_shift < 0)
1128 return 0;
1129
1130 if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) {
1131 best_mode = SYSC_IDLE_FORCE;
1132 } else {
1133 ret = sysc_best_idle_mode(idlemodes, &best_mode);
1134 if (ret) {
1135 dev_err(dev, "%s: invalid sidlemode\n", __func__);
1136 return ret;
1137 }
1138 }
1139
1140 reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
1141 reg |= best_mode << regbits->sidle_shift;
1142 if (regbits->autoidle_shift >= 0 &&
1143 ddata->cfg.sysc_val & BIT(regbits->autoidle_shift))
1144 reg |= 1 << regbits->autoidle_shift;
1145 sysc_write_sysconfig(ddata, reg);
1146
1147 /* Flush posted write */
1148 sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
1149
1150 return 0;
1151 }
1152
1153 static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev,
1154 struct sysc *ddata)
1155 {
1156 struct ti_sysc_platform_data *pdata;
1157 int error;
1158
1159 pdata = dev_get_platdata(ddata->dev);
1160 if (!pdata)
1161 return 0;
1162
1163 if (!pdata->idle_module)
1164 return -ENODEV;
1165
1166 error = pdata->idle_module(dev, &ddata->cookie);
1167 if (error)
1168 dev_err(dev, "%s: could not idle: %i\n",
1169 __func__, error);
1170
1171 reset_control_assert(ddata->rsts);
1172
1173 return 0;
1174 }
1175
1176 static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev,
1177 struct sysc *ddata)
1178 {
1179 struct ti_sysc_platform_data *pdata;
1180 int error;
1181
1182 pdata = dev_get_platdata(ddata->dev);
1183 if (!pdata)
1184 return 0;
1185
1186 if (!pdata->enable_module)
1187 return -ENODEV;
1188
1189 error = pdata->enable_module(dev, &ddata->cookie);
1190 if (error)
1191 dev_err(dev, "%s: could not enable: %i\n",
1192 __func__, error);
1193
1194 reset_control_deassert(ddata->rsts);
1195
1196 return 0;
1197 }
1198
1199 static int __maybe_unused sysc_runtime_suspend(struct device *dev)
1200 {
1201 struct sysc *ddata;
1202 int error = 0;
1203
1204 ddata = dev_get_drvdata(dev);
1205
1206 if (!ddata->enabled)
1207 return 0;
1208
1209 sysc_clkdm_deny_idle(ddata);
1210
1211 if (ddata->legacy_mode) {
1212 error = sysc_runtime_suspend_legacy(dev, ddata);
1213 if (error)
1214 goto err_allow_idle;
1215 } else {
1216 error = sysc_disable_module(dev);
1217 if (error)
1218 goto err_allow_idle;
1219 }
1220
1221 sysc_disable_main_clocks(ddata);
1222
1223 if (sysc_opt_clks_needed(ddata))
1224 sysc_disable_opt_clocks(ddata);
1225
1226 ddata->enabled = false;
1227
1228 err_allow_idle:
1229 sysc_clkdm_allow_idle(ddata);
1230
1231 reset_control_assert(ddata->rsts);
1232
1233 return error;
1234 }
1235
1236 static int __maybe_unused sysc_runtime_resume(struct device *dev)
1237 {
1238 struct sysc *ddata;
1239 int error = 0;
1240
1241 ddata = dev_get_drvdata(dev);
1242
1243 if (ddata->enabled)
1244 return 0;
1245
1246
1247 sysc_clkdm_deny_idle(ddata);
1248
1249 if (sysc_opt_clks_needed(ddata)) {
1250 error = sysc_enable_opt_clocks(ddata);
1251 if (error)
1252 goto err_allow_idle;
1253 }
1254
1255 error = sysc_enable_main_clocks(ddata);
1256 if (error)
1257 goto err_opt_clocks;
1258
1259 reset_control_deassert(ddata->rsts);
1260
1261 if (ddata->legacy_mode) {
1262 error = sysc_runtime_resume_legacy(dev, ddata);
1263 if (error)
1264 goto err_main_clocks;
1265 } else {
1266 error = sysc_enable_module(dev);
1267 if (error)
1268 goto err_main_clocks;
1269 }
1270
1271 ddata->enabled = true;
1272
1273 sysc_clkdm_allow_idle(ddata);
1274
1275 return 0;
1276
1277 err_main_clocks:
1278 sysc_disable_main_clocks(ddata);
1279 err_opt_clocks:
1280 if (sysc_opt_clks_needed(ddata))
1281 sysc_disable_opt_clocks(ddata);
1282 err_allow_idle:
1283 sysc_clkdm_allow_idle(ddata);
1284
1285 return error;
1286 }
1287
1288 static int __maybe_unused sysc_noirq_suspend(struct device *dev)
1289 {
1290 struct sysc *ddata;
1291
1292 ddata = dev_get_drvdata(dev);
1293
1294 if (ddata->cfg.quirks &
1295 (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
1296 return 0;
1297
1298 return pm_runtime_force_suspend(dev);
1299 }
1300
1301 static int __maybe_unused sysc_noirq_resume(struct device *dev)
1302 {
1303 struct sysc *ddata;
1304
1305 ddata = dev_get_drvdata(dev);
1306
1307 if (ddata->cfg.quirks &
1308 (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
1309 return 0;
1310
1311 return pm_runtime_force_resume(dev);
1312 }
1313
1314 static const struct dev_pm_ops sysc_pm_ops = {
1315 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
1316 SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
1317 sysc_runtime_resume,
1318 NULL)
1319 };
1320
1321 /* Module revision register based quirks */
1322 struct sysc_revision_quirk {
1323 const char *name;
1324 u32 base;
1325 int rev_offset;
1326 int sysc_offset;
1327 int syss_offset;
1328 u32 revision;
1329 u32 revision_mask;
1330 u32 quirks;
1331 };
1332
1333 #define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \
1334 optrev_val, optrevmask, optquirkmask) \
1335 { \
1336 .name = (optname), \
1337 .base = (optbase), \
1338 .rev_offset = (optrev), \
1339 .sysc_offset = (optsysc), \
1340 .syss_offset = (optsyss), \
1341 .revision = (optrev_val), \
1342 .revision_mask = (optrevmask), \
1343 .quirks = (optquirkmask), \
1344 }
1345
1346 static const struct sysc_revision_quirk sysc_revision_quirks[] = {
1347 /* These drivers need to be fixed to not use pm_runtime_irq_safe() */
1348 SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
1349 SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
1350 SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
1351 SYSC_QUIRK_LEGACY_IDLE),
1352 SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x24, -ENODEV, 0x00000000, 0xffffffff,
1353 SYSC_QUIRK_LEGACY_IDLE),
1354 SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x38, -ENODEV, 0x00000000, 0xffffffff,
1355 SYSC_QUIRK_LEGACY_IDLE),
1356 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
1357 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
1358 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
1359 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
1360 /* Uarts on omap4 and later */
1361 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
1362 SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
1363 SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
1364 SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE),
1365
1366 /* Quirks that need to be set based on the module address */
1367 SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -ENODEV, 0x50000800, 0xffffffff,
1368 SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT |
1369 SYSC_QUIRK_SWSUP_SIDLE),
1370
1371 /* Quirks that need to be set based on detected module */
1372 SYSC_QUIRK("aess", 0, 0, 0x10, -ENODEV, 0x40000000, 0xffffffff,
1373 SYSC_MODULE_QUIRK_AESS),
1374 SYSC_QUIRK("dcan", 0x48480000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
1375 SYSC_QUIRK_CLKDM_NOAUTO),
1376 SYSC_QUIRK("dss", 0x4832a000, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
1377 SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
1378 SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000040, 0xffffffff,
1379 SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
1380 SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000061, 0xffffffff,
1381 SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
1382 SYSC_QUIRK("dwc3", 0x48880000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
1383 SYSC_QUIRK_CLKDM_NOAUTO),
1384 SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
1385 SYSC_QUIRK_CLKDM_NOAUTO),
1386 SYSC_QUIRK("gpmc", 0, 0, 0x10, 0x14, 0x00000060, 0xffffffff,
1387 SYSC_QUIRK_GPMC_DEBUG),
1388 SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50030200, 0xffffffff,
1389 SYSC_QUIRK_OPT_CLKS_NEEDED),
1390 SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
1391 SYSC_MODULE_QUIRK_HDQ1W | SYSC_MODULE_QUIRK_ENA_RESETDONE),
1392 SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,
1393 SYSC_MODULE_QUIRK_HDQ1W | SYSC_MODULE_QUIRK_ENA_RESETDONE),
1394 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000036, 0x000000ff,
1395 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
1396 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x0000003c, 0x000000ff,
1397 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
1398 SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000040, 0x000000ff,
1399 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
1400 SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0,
1401 SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
1402 SYSC_QUIRK("gpu", 0x50000000, 0x14, -ENODEV, -ENODEV, 0x00010201, 0xffffffff, 0),
1403 SYSC_QUIRK("gpu", 0x50000000, 0xfe00, 0xfe10, -ENODEV, 0x40000000 , 0xffffffff,
1404 SYSC_MODULE_QUIRK_SGX),
1405 SYSC_QUIRK("lcdc", 0, 0, 0x54, -ENODEV, 0x4f201000, 0xffffffff,
1406 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1407 SYSC_QUIRK("rtc", 0, 0x74, 0x78, -ENODEV, 0x4eb01908, 0xffff00f0,
1408 SYSC_MODULE_QUIRK_RTC_UNLOCK),
1409 SYSC_QUIRK("tptc", 0, 0, 0x10, -ENODEV, 0x40006c00, 0xffffefff,
1410 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1411 SYSC_QUIRK("tptc", 0, 0, -ENODEV, -ENODEV, 0x40007c00, 0xffffffff,
1412 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1413 SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff,
1414 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1415 SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -ENODEV, 0x50700101, 0xffffffff,
1416 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1417 SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
1418 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1419 SYSC_QUIRK("usb_otg_hs", 0, 0, 0x10, -ENODEV, 0x4ea2080d, 0xffffffff,
1420 SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
1421 SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
1422 SYSC_MODULE_QUIRK_WDT),
1423 /* PRUSS on am3, am4 and am5 */
1424 SYSC_QUIRK("pruss", 0, 0x26000, 0x26004, -ENODEV, 0x47000000, 0xff000000,
1425 SYSC_MODULE_QUIRK_PRUSS),
1426 /* Watchdog on am3 and am4 */
1427 SYSC_QUIRK("wdt", 0x44e35000, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
1428 SYSC_MODULE_QUIRK_WDT | SYSC_QUIRK_SWSUP_SIDLE),
1429
1430 #ifdef DEBUG
1431 SYSC_QUIRK("adc", 0, 0, 0x10, -ENODEV, 0x47300001, 0xffffffff, 0),
1432 SYSC_QUIRK("atl", 0, 0, -ENODEV, -ENODEV, 0x0a070100, 0xffffffff, 0),
1433 SYSC_QUIRK("cm", 0, 0, -ENODEV, -ENODEV, 0x40000301, 0xffffffff, 0),
1434 SYSC_QUIRK("control", 0, 0, 0x10, -ENODEV, 0x40000900, 0xffffffff, 0),
1435 SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902,
1436 0xffff00f0, 0),
1437 SYSC_QUIRK("dcan", 0, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff, 0),
1438 SYSC_QUIRK("dcan", 0, 0x20, -ENODEV, -ENODEV, 0x4edb1902, 0xffffffff, 0),
1439 SYSC_QUIRK("dispc", 0x4832a400, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0),
1440 SYSC_QUIRK("dispc", 0x58001000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0),
1441 SYSC_QUIRK("dispc", 0x58001000, 0, 0x10, 0x14, 0x00000051, 0xffffffff, 0),
1442 SYSC_QUIRK("dmic", 0, 0, 0x10, -ENODEV, 0x50010000, 0xffffffff, 0),
1443 SYSC_QUIRK("dsi", 0x58004000, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0),
1444 SYSC_QUIRK("dsi", 0x58005000, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0),
1445 SYSC_QUIRK("dsi", 0x58005000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0),
1446 SYSC_QUIRK("dsi", 0x58009000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0),
1447 SYSC_QUIRK("dwc3", 0, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff, 0),
1448 SYSC_QUIRK("d2d", 0x4a0b6000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
1449 SYSC_QUIRK("d2d", 0x4a0cd000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
1450 SYSC_QUIRK("epwmss", 0, 0, 0x4, -ENODEV, 0x47400001, 0xffffffff, 0),
1451 SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -ENODEV, 0, 0, 0),
1452 SYSC_QUIRK("gpu", 0, 0xfe00, 0xfe10, -ENODEV, 0x40000000 , 0xffffffff, 0),
1453 SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50031d00, 0xffffffff, 0),
1454 SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
1455 SYSC_QUIRK("iss", 0, 0, 0x10, -ENODEV, 0x40000101, 0xffffffff, 0),
1456 SYSC_QUIRK("mcasp", 0, 0, 0x4, -ENODEV, 0x44306302, 0xffffffff, 0),
1457 SYSC_QUIRK("mcasp", 0, 0, 0x4, -ENODEV, 0x44307b02, 0xffffffff, 0),
1458 SYSC_QUIRK("mcbsp", 0, -ENODEV, 0x8c, -ENODEV, 0, 0, 0),
1459 SYSC_QUIRK("mcspi", 0, 0, 0x10, -ENODEV, 0x40300a0b, 0xffff00ff, 0),
1460 SYSC_QUIRK("mcspi", 0, 0, 0x110, 0x114, 0x40300a0b, 0xffffffff, 0),
1461 SYSC_QUIRK("mailbox", 0, 0, 0x10, -ENODEV, 0x00000400, 0xffffffff, 0),
1462 SYSC_QUIRK("m3", 0, 0, -ENODEV, -ENODEV, 0x5f580105, 0x0fff0f00, 0),
1463 SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xfffffff0, 0),
1464 SYSC_QUIRK("ocp2scp", 0, 0, -ENODEV, -ENODEV, 0x50060007, 0xffffffff, 0),
1465 SYSC_QUIRK("padconf", 0, 0, 0x10, -ENODEV, 0x4fff0800, 0xffffffff, 0),
1466 SYSC_QUIRK("padconf", 0, 0, -ENODEV, -ENODEV, 0x40001100, 0xffffffff, 0),
1467 SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x40000100, 0xffffffff, 0),
1468 SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x00004102, 0xffffffff, 0),
1469 SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x40000400, 0xffffffff, 0),
1470 SYSC_QUIRK("rfbi", 0x4832a800, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
1471 SYSC_QUIRK("rfbi", 0x58002000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
1472 SYSC_QUIRK("scm", 0, 0, 0x10, -ENODEV, 0x40000900, 0xffffffff, 0),
1473 SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x4e8b0100, 0xffffffff, 0),
1474 SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x4f000100, 0xffffffff, 0),
1475 SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x40000900, 0xffffffff, 0),
1476 SYSC_QUIRK("scrm", 0, 0, -ENODEV, -ENODEV, 0x00000010, 0xffffffff, 0),
1477 SYSC_QUIRK("sdio", 0, 0, 0x10, -ENODEV, 0x40202301, 0xffff0ff0, 0),
1478 SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0),
1479 SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0),
1480 SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40000902, 0xffffffff, 0),
1481 SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40002903, 0xffffffff, 0),
1482 SYSC_QUIRK("spinlock", 0, 0, 0x10, -ENODEV, 0x50020000, 0xffffffff, 0),
1483 SYSC_QUIRK("rng", 0, 0x1fe0, 0x1fe4, -ENODEV, 0x00000020, 0xffffffff, 0),
1484 SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000013, 0xffffffff, 0),
1485 SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff, 0),
1486 /* Some timers on omap4 and later */
1487 SYSC_QUIRK("timer", 0, 0, 0x10, -ENODEV, 0x50002100, 0xffffffff, 0),
1488 SYSC_QUIRK("timer", 0, 0, 0x10, -ENODEV, 0x4fff1301, 0xffff00ff, 0),
1489 SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000040, 0xffffffff, 0),
1490 SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000011, 0xffffffff, 0),
1491 SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000060, 0xffffffff, 0),
1492 SYSC_QUIRK("tpcc", 0, 0, -ENODEV, -ENODEV, 0x40014c00, 0xffffffff, 0),
1493 SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0),
1494 SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0),
1495 SYSC_QUIRK("venc", 0x58003000, 0, -ENODEV, -ENODEV, 0x00000002, 0xffffffff, 0),
1496 SYSC_QUIRK("vfpe", 0, 0, 0x104, -ENODEV, 0x4d001200, 0xffffffff, 0),
1497 #endif
1498 };
1499
1500 /*
1501 * Early quirks based on module base and register offsets only that are
1502 * needed before the module revision can be read
1503 */
1504 static void sysc_init_early_quirks(struct sysc *ddata)
1505 {
1506 const struct sysc_revision_quirk *q;
1507 int i;
1508
1509 for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
1510 q = &sysc_revision_quirks[i];
1511
1512 if (!q->base)
1513 continue;
1514
1515 if (q->base != ddata->module_pa)
1516 continue;
1517
1518 if (q->rev_offset != ddata->offsets[SYSC_REVISION])
1519 continue;
1520
1521 if (q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
1522 continue;
1523
1524 if (q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
1525 continue;
1526
1527 ddata->name = q->name;
1528 ddata->cfg.quirks |= q->quirks;
1529 }
1530 }
1531
1532 /* Quirks that also consider the revision register value */
1533 static void sysc_init_revision_quirks(struct sysc *ddata)
1534 {
1535 const struct sysc_revision_quirk *q;
1536 int i;
1537
1538 for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
1539 q = &sysc_revision_quirks[i];
1540
1541 if (q->base && q->base != ddata->module_pa)
1542 continue;
1543
1544 if (q->rev_offset != ddata->offsets[SYSC_REVISION])
1545 continue;
1546
1547 if (q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
1548 continue;
1549
1550 if (q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
1551 continue;
1552
1553 if (q->revision == ddata->revision ||
1554 (q->revision & q->revision_mask) ==
1555 (ddata->revision & q->revision_mask)) {
1556 ddata->name = q->name;
1557 ddata->cfg.quirks |= q->quirks;
1558 }
1559 }
1560 }
1561
1562 /*
1563 * DSS needs dispc outputs disabled to reset modules. Returns mask of
1564 * enabled DSS interrupts. Eventually we may be able to do this on
1565 * dispc init rather than top-level DSS init.
1566 */
1567 static u32 sysc_quirk_dispc(struct sysc *ddata, int dispc_offset,
1568 bool disable)
1569 {
1570 bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false;
1571 const int lcd_en_mask = BIT(0), digit_en_mask = BIT(1);
1572 int manager_count;
1573 bool framedonetv_irq = true;
1574 u32 val, irq_mask = 0;
1575
1576 switch (sysc_soc->soc) {
1577 case SOC_2420 ... SOC_3630:
1578 manager_count = 2;
1579 framedonetv_irq = false;
1580 break;
1581 case SOC_4430 ... SOC_4470:
1582 manager_count = 3;
1583 break;
1584 case SOC_5430:
1585 case SOC_DRA7:
1586 manager_count = 4;
1587 break;
1588 case SOC_AM4:
1589 manager_count = 1;
1590 framedonetv_irq = false;
1591 break;
1592 case SOC_UNKNOWN:
1593 default:
1594 return 0;
1595 };
1596
1597 /* Remap the whole module range to be able to reset dispc outputs */
1598 devm_iounmap(ddata->dev, ddata->module_va);
1599 ddata->module_va = devm_ioremap(ddata->dev,
1600 ddata->module_pa,
1601 ddata->module_size);
1602 if (!ddata->module_va)
1603 return -EIO;
1604
1605 /* DISP_CONTROL */
1606 val = sysc_read(ddata, dispc_offset + 0x40);
1607 lcd_en = val & lcd_en_mask;
1608 digit_en = val & digit_en_mask;
1609 if (lcd_en)
1610 irq_mask |= BIT(0); /* FRAMEDONE */
1611 if (digit_en) {
1612 if (framedonetv_irq)
1613 irq_mask |= BIT(24); /* FRAMEDONETV */
1614 else
1615 irq_mask |= BIT(2) | BIT(3); /* EVSYNC bits */
1616 }
1617 if (disable & (lcd_en | digit_en))
1618 sysc_write(ddata, dispc_offset + 0x40,
1619 val & ~(lcd_en_mask | digit_en_mask));
1620
1621 if (manager_count <= 2)
1622 return irq_mask;
1623
1624 /* DISPC_CONTROL2 */
1625 val = sysc_read(ddata, dispc_offset + 0x238);
1626 lcd2_en = val & lcd_en_mask;
1627 if (lcd2_en)
1628 irq_mask |= BIT(22); /* FRAMEDONE2 */
1629 if (disable && lcd2_en)
1630 sysc_write(ddata, dispc_offset + 0x238,
1631 val & ~lcd_en_mask);
1632
1633 if (manager_count <= 3)
1634 return irq_mask;
1635
1636 /* DISPC_CONTROL3 */
1637 val = sysc_read(ddata, dispc_offset + 0x848);
1638 lcd3_en = val & lcd_en_mask;
1639 if (lcd3_en)
1640 irq_mask |= BIT(30); /* FRAMEDONE3 */
1641 if (disable && lcd3_en)
1642 sysc_write(ddata, dispc_offset + 0x848,
1643 val & ~lcd_en_mask);
1644
1645 return irq_mask;
1646 }
1647
1648 /* DSS needs child outputs disabled and SDI registers cleared for reset */
1649 static void sysc_pre_reset_quirk_dss(struct sysc *ddata)
1650 {
1651 const int dispc_offset = 0x1000;
1652 int error;
1653 u32 irq_mask, val;
1654
1655 /* Get enabled outputs */
1656 irq_mask = sysc_quirk_dispc(ddata, dispc_offset, false);
1657 if (!irq_mask)
1658 return;
1659
1660 /* Clear IRQSTATUS */
1661 sysc_write(ddata, dispc_offset + 0x18, irq_mask);
1662
1663 /* Disable outputs */
1664 val = sysc_quirk_dispc(ddata, dispc_offset, true);
1665
1666 /* Poll IRQSTATUS */
1667 error = readl_poll_timeout(ddata->module_va + dispc_offset + 0x18,
1668 val, val != irq_mask, 100, 50);
1669 if (error)
1670 dev_warn(ddata->dev, "%s: timed out %08x !+ %08x\n",
1671 __func__, val, irq_mask);
1672
1673 if (sysc_soc->soc == SOC_3430) {
1674 /* Clear DSS_SDI_CONTROL */
1675 sysc_write(ddata, 0x44, 0);
1676
1677 /* Clear DSS_PLL_CONTROL */
1678 sysc_write(ddata, 0x48, 0);
1679 }
1680
1681 /* Clear DSS_CONTROL to switch DSS clock sources to PRCM if not */
1682 sysc_write(ddata, 0x40, 0);
1683 }
1684
1685 /* 1-wire needs module's internal clocks enabled for reset */
1686 static void sysc_pre_reset_quirk_hdq1w(struct sysc *ddata)
1687 {
1688 int offset = 0x0c; /* HDQ_CTRL_STATUS */
1689 u16 val;
1690
1691 val = sysc_read(ddata, offset);
1692 val |= BIT(5);
1693 sysc_write(ddata, offset, val);
1694 }
1695
1696 /* AESS (Audio Engine SubSystem) needs autogating set after enable */
1697 static void sysc_module_enable_quirk_aess(struct sysc *ddata)
1698 {
1699 int offset = 0x7c; /* AESS_AUTO_GATING_ENABLE */
1700
1701 sysc_write(ddata, offset, 1);
1702 }
1703
1704 /* I2C needs to be disabled for reset */
1705 static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable)
1706 {
1707 int offset;
1708 u16 val;
1709
1710 /* I2C_CON, omap2/3 is different from omap4 and later */
1711 if ((ddata->revision & 0xffffff00) == 0x001f0000)
1712 offset = 0x24;
1713 else
1714 offset = 0xa4;
1715
1716 /* I2C_EN */
1717 val = sysc_read(ddata, offset);
1718 if (enable)
1719 val |= BIT(15);
1720 else
1721 val &= ~BIT(15);
1722 sysc_write(ddata, offset, val);
1723 }
1724
1725 static void sysc_pre_reset_quirk_i2c(struct sysc *ddata)
1726 {
1727 sysc_clk_quirk_i2c(ddata, false);
1728 }
1729
1730 static void sysc_post_reset_quirk_i2c(struct sysc *ddata)
1731 {
1732 sysc_clk_quirk_i2c(ddata, true);
1733 }
1734
1735 /* RTC on am3 and 4 needs to be unlocked and locked for sysconfig */
1736 static void sysc_quirk_rtc(struct sysc *ddata, bool lock)
1737 {
1738 u32 val, kick0_val = 0, kick1_val = 0;
1739 unsigned long flags;
1740 int error;
1741
1742 if (!lock) {
1743 kick0_val = 0x83e70b13;
1744 kick1_val = 0x95a4f1e0;
1745 }
1746
1747 local_irq_save(flags);
1748 /* RTC_STATUS BUSY bit may stay active for 1/32768 seconds (~30 usec) */
1749 error = readl_poll_timeout_atomic(ddata->module_va + 0x44, val,
1750 !(val & BIT(0)), 100, 50);
1751 if (error)
1752 dev_warn(ddata->dev, "rtc busy timeout\n");
1753 /* Now we have ~15 microseconds to read/write various registers */
1754 sysc_write(ddata, 0x6c, kick0_val);
1755 sysc_write(ddata, 0x70, kick1_val);
1756 local_irq_restore(flags);
1757 }
1758
1759 static void sysc_module_unlock_quirk_rtc(struct sysc *ddata)
1760 {
1761 sysc_quirk_rtc(ddata, false);
1762 }
1763
1764 static void sysc_module_lock_quirk_rtc(struct sysc *ddata)
1765 {
1766 sysc_quirk_rtc(ddata, true);
1767 }
1768
1769 /* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */
1770 static void sysc_module_enable_quirk_sgx(struct sysc *ddata)
1771 {
1772 int offset = 0xff08; /* OCP_DEBUG_CONFIG */
1773 u32 val = BIT(31); /* THALIA_INT_BYPASS */
1774
1775 sysc_write(ddata, offset, val);
1776 }
1777
1778 /* Watchdog timer needs a disable sequence after reset */
1779 static void sysc_reset_done_quirk_wdt(struct sysc *ddata)
1780 {
1781 int wps, spr, error;
1782 u32 val;
1783
1784 wps = 0x34;
1785 spr = 0x48;
1786
1787 sysc_write(ddata, spr, 0xaaaa);
1788 error = readl_poll_timeout(ddata->module_va + wps, val,
1789 !(val & 0x10), 100,
1790 MAX_MODULE_SOFTRESET_WAIT);
1791 if (error)
1792 dev_warn(ddata->dev, "wdt disable step1 failed\n");
1793
1794 sysc_write(ddata, spr, 0x5555);
1795 error = readl_poll_timeout(ddata->module_va + wps, val,
1796 !(val & 0x10), 100,
1797 MAX_MODULE_SOFTRESET_WAIT);
1798 if (error)
1799 dev_warn(ddata->dev, "wdt disable step2 failed\n");
1800 }
1801
1802 /* PRUSS needs to set MSTANDBY_INIT inorder to idle properly */
1803 static void sysc_module_disable_quirk_pruss(struct sysc *ddata)
1804 {
1805 u32 reg;
1806
1807 reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
1808 reg |= SYSC_PRUSS_STANDBY_INIT;
1809 sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
1810 }
1811
1812 static void sysc_init_module_quirks(struct sysc *ddata)
1813 {
1814 if (ddata->legacy_mode || !ddata->name)
1815 return;
1816
1817 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_HDQ1W) {
1818 ddata->pre_reset_quirk = sysc_pre_reset_quirk_hdq1w;
1819
1820 return;
1821 }
1822
1823 #ifdef CONFIG_OMAP_GPMC_DEBUG
1824 if (ddata->cfg.quirks & SYSC_QUIRK_GPMC_DEBUG) {
1825 ddata->cfg.quirks |= SYSC_QUIRK_NO_RESET_ON_INIT;
1826
1827 return;
1828 }
1829 #endif
1830
1831 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_I2C) {
1832 ddata->pre_reset_quirk = sysc_pre_reset_quirk_i2c;
1833 ddata->post_reset_quirk = sysc_post_reset_quirk_i2c;
1834
1835 return;
1836 }
1837
1838 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_AESS)
1839 ddata->module_enable_quirk = sysc_module_enable_quirk_aess;
1840
1841 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_DSS_RESET)
1842 ddata->pre_reset_quirk = sysc_pre_reset_quirk_dss;
1843
1844 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_RTC_UNLOCK) {
1845 ddata->module_unlock_quirk = sysc_module_unlock_quirk_rtc;
1846 ddata->module_lock_quirk = sysc_module_lock_quirk_rtc;
1847
1848 return;
1849 }
1850
1851 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX)
1852 ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
1853
1854 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT) {
1855 ddata->reset_done_quirk = sysc_reset_done_quirk_wdt;
1856 ddata->module_disable_quirk = sysc_reset_done_quirk_wdt;
1857 }
1858
1859 if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_PRUSS)
1860 ddata->module_disable_quirk = sysc_module_disable_quirk_pruss;
1861 }
1862
1863 static int sysc_clockdomain_init(struct sysc *ddata)
1864 {
1865 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
1866 struct clk *fck = NULL, *ick = NULL;
1867 int error;
1868
1869 if (!pdata || !pdata->init_clockdomain)
1870 return 0;
1871
1872 switch (ddata->nr_clocks) {
1873 case 2:
1874 ick = ddata->clocks[SYSC_ICK];
1875 fallthrough;
1876 case 1:
1877 fck = ddata->clocks[SYSC_FCK];
1878 break;
1879 case 0:
1880 return 0;
1881 }
1882
1883 error = pdata->init_clockdomain(ddata->dev, fck, ick, &ddata->cookie);
1884 if (!error || error == -ENODEV)
1885 return 0;
1886
1887 return error;
1888 }
1889
1890 /*
1891 * Note that pdata->init_module() typically does a reset first. After
1892 * pdata->init_module() is done, PM runtime can be used for the interconnect
1893 * target module.
1894 */
1895 static int sysc_legacy_init(struct sysc *ddata)
1896 {
1897 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
1898 int error;
1899
1900 if (!pdata || !pdata->init_module)
1901 return 0;
1902
1903 error = pdata->init_module(ddata->dev, ddata->mdata, &ddata->cookie);
1904 if (error == -EEXIST)
1905 error = 0;
1906
1907 return error;
1908 }
1909
1910 /*
1911 * Note that the caller must ensure the interconnect target module is enabled
1912 * before calling reset. Otherwise reset will not complete.
1913 */
1914 static int sysc_reset(struct sysc *ddata)
1915 {
1916 int sysc_offset, sysc_val, error;
1917 u32 sysc_mask;
1918
1919 sysc_offset = ddata->offsets[SYSC_SYSCONFIG];
1920
1921 if (ddata->legacy_mode ||
1922 ddata->cap->regbits->srst_shift < 0 ||
1923 ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
1924 return 0;
1925
1926 sysc_mask = BIT(ddata->cap->regbits->srst_shift);
1927
1928 if (ddata->pre_reset_quirk)
1929 ddata->pre_reset_quirk(ddata);
1930
1931 if (sysc_offset >= 0) {
1932 sysc_val = sysc_read_sysconfig(ddata);
1933 sysc_val |= sysc_mask;
1934 sysc_write(ddata, sysc_offset, sysc_val);
1935 }
1936
1937 if (ddata->cfg.srst_udelay)
1938 usleep_range(ddata->cfg.srst_udelay,
1939 ddata->cfg.srst_udelay * 2);
1940
1941 if (ddata->post_reset_quirk)
1942 ddata->post_reset_quirk(ddata);
1943
1944 error = sysc_wait_softreset(ddata);
1945 if (error)
1946 dev_warn(ddata->dev, "OCP softreset timed out\n");
1947
1948 if (ddata->reset_done_quirk)
1949 ddata->reset_done_quirk(ddata);
1950
1951 return error;
1952 }
1953
1954 /*
1955 * At this point the module is configured enough to read the revision but
1956 * module may not be completely configured yet to use PM runtime. Enable
1957 * all clocks directly during init to configure the quirks needed for PM
1958 * runtime based on the revision register.
1959 */
1960 static int sysc_init_module(struct sysc *ddata)
1961 {
1962 bool rstctrl_deasserted = false;
1963 int error = 0;
1964
1965 error = sysc_clockdomain_init(ddata);
1966 if (error)
1967 return error;
1968
1969 sysc_clkdm_deny_idle(ddata);
1970
1971 /*
1972 * Always enable clocks. The bootloader may or may not have enabled
1973 * the related clocks.
1974 */
1975 error = sysc_enable_opt_clocks(ddata);
1976 if (error)
1977 return error;
1978
1979 error = sysc_enable_main_clocks(ddata);
1980 if (error)
1981 goto err_opt_clocks;
1982
1983 if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) {
1984 error = reset_control_deassert(ddata->rsts);
1985 if (error)
1986 goto err_main_clocks;
1987 rstctrl_deasserted = true;
1988 }
1989
1990 ddata->revision = sysc_read_revision(ddata);
1991 sysc_init_revision_quirks(ddata);
1992 sysc_init_module_quirks(ddata);
1993
1994 if (ddata->legacy_mode) {
1995 error = sysc_legacy_init(ddata);
1996 if (error)
1997 goto err_main_clocks;
1998 }
1999
2000 if (!ddata->legacy_mode) {
2001 error = sysc_enable_module(ddata->dev);
2002 if (error)
2003 goto err_main_clocks;
2004 }
2005
2006 error = sysc_reset(ddata);
2007 if (error)
2008 dev_err(ddata->dev, "Reset failed with %d\n", error);
2009
2010 if (error && !ddata->legacy_mode)
2011 sysc_disable_module(ddata->dev);
2012
2013 err_main_clocks:
2014 if (error)
2015 sysc_disable_main_clocks(ddata);
2016 err_opt_clocks:
2017 /* No re-enable of clockdomain autoidle to prevent module autoidle */
2018 if (error) {
2019 sysc_disable_opt_clocks(ddata);
2020 sysc_clkdm_allow_idle(ddata);
2021 }
2022
2023 if (error && rstctrl_deasserted &&
2024 !(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT))
2025 reset_control_assert(ddata->rsts);
2026
2027 return error;
2028 }
2029
2030 static int sysc_init_sysc_mask(struct sysc *ddata)
2031 {
2032 struct device_node *np = ddata->dev->of_node;
2033 int error;
2034 u32 val;
2035
2036 error = of_property_read_u32(np, "ti,sysc-mask", &val);
2037 if (error)
2038 return 0;
2039
2040 ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
2041
2042 return 0;
2043 }
2044
2045 static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
2046 const char *name)
2047 {
2048 struct device_node *np = ddata->dev->of_node;
2049 struct property *prop;
2050 const __be32 *p;
2051 u32 val;
2052
2053 of_property_for_each_u32(np, name, prop, p, val) {
2054 if (val >= SYSC_NR_IDLEMODES) {
2055 dev_err(ddata->dev, "invalid idlemode: %i\n", val);
2056 return -EINVAL;
2057 }
2058 *idlemodes |= (1 << val);
2059 }
2060
2061 return 0;
2062 }
2063
2064 static int sysc_init_idlemodes(struct sysc *ddata)
2065 {
2066 int error;
2067
2068 error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes,
2069 "ti,sysc-midle");
2070 if (error)
2071 return error;
2072
2073 error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes,
2074 "ti,sysc-sidle");
2075 if (error)
2076 return error;
2077
2078 return 0;
2079 }
2080
2081 /*
2082 * Only some devices on omap4 and later have SYSCONFIG reset done
2083 * bit. We can detect this if there is no SYSSTATUS at all, or the
2084 * SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers
2085 * have multiple bits for the child devices like OHCI and EHCI.
2086 * Depends on SYSC being parsed first.
2087 */
2088 static int sysc_init_syss_mask(struct sysc *ddata)
2089 {
2090 struct device_node *np = ddata->dev->of_node;
2091 int error;
2092 u32 val;
2093
2094 error = of_property_read_u32(np, "ti,syss-mask", &val);
2095 if (error) {
2096 if ((ddata->cap->type == TI_SYSC_OMAP4 ||
2097 ddata->cap->type == TI_SYSC_OMAP4_TIMER) &&
2098 (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
2099 ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
2100
2101 return 0;
2102 }
2103
2104 if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
2105 ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
2106
2107 ddata->cfg.syss_mask = val;
2108
2109 return 0;
2110 }
2111
2112 /*
2113 * Many child device drivers need to have fck and opt clocks available
2114 * to get the clock rate for device internal configuration etc.
2115 */
2116 static int sysc_child_add_named_clock(struct sysc *ddata,
2117 struct device *child,
2118 const char *name)
2119 {
2120 struct clk *clk;
2121 struct clk_lookup *l;
2122 int error = 0;
2123
2124 if (!name)
2125 return 0;
2126
2127 clk = clk_get(child, name);
2128 if (!IS_ERR(clk)) {
2129 error = -EEXIST;
2130 goto put_clk;
2131 }
2132
2133 clk = clk_get(ddata->dev, name);
2134 if (IS_ERR(clk))
2135 return -ENODEV;
2136
2137 l = clkdev_create(clk, name, dev_name(child));
2138 if (!l)
2139 error = -ENOMEM;
2140 put_clk:
2141 clk_put(clk);
2142
2143 return error;
2144 }
2145
2146 static int sysc_child_add_clocks(struct sysc *ddata,
2147 struct device *child)
2148 {
2149 int i, error;
2150
2151 for (i = 0; i < ddata->nr_clocks; i++) {
2152 error = sysc_child_add_named_clock(ddata,
2153 child,
2154 ddata->clock_roles[i]);
2155 if (error && error != -EEXIST) {
2156 dev_err(ddata->dev, "could not add child clock %s: %i\n",
2157 ddata->clock_roles[i], error);
2158
2159 return error;
2160 }
2161 }
2162
2163 return 0;
2164 }
2165
2166 static struct device_type sysc_device_type = {
2167 };
2168
2169 static struct sysc *sysc_child_to_parent(struct device *dev)
2170 {
2171 struct device *parent = dev->parent;
2172
2173 if (!parent || parent->type != &sysc_device_type)
2174 return NULL;
2175
2176 return dev_get_drvdata(parent);
2177 }
2178
2179 static int __maybe_unused sysc_child_runtime_suspend(struct device *dev)
2180 {
2181 struct sysc *ddata;
2182 int error;
2183
2184 ddata = sysc_child_to_parent(dev);
2185
2186 error = pm_generic_runtime_suspend(dev);
2187 if (error)
2188 return error;
2189
2190 if (!ddata->enabled)
2191 return 0;
2192
2193 return sysc_runtime_suspend(ddata->dev);
2194 }
2195
2196 static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
2197 {
2198 struct sysc *ddata;
2199 int error;
2200
2201 ddata = sysc_child_to_parent(dev);
2202
2203 if (!ddata->enabled) {
2204 error = sysc_runtime_resume(ddata->dev);
2205 if (error < 0)
2206 dev_err(ddata->dev,
2207 "%s error: %i\n", __func__, error);
2208 }
2209
2210 return pm_generic_runtime_resume(dev);
2211 }
2212
2213 #ifdef CONFIG_PM_SLEEP
2214 static int sysc_child_suspend_noirq(struct device *dev)
2215 {
2216 struct sysc *ddata;
2217 int error;
2218
2219 ddata = sysc_child_to_parent(dev);
2220
2221 dev_dbg(ddata->dev, "%s %s\n", __func__,
2222 ddata->name ? ddata->name : "");
2223
2224 error = pm_generic_suspend_noirq(dev);
2225 if (error) {
2226 dev_err(dev, "%s error at %i: %i\n",
2227 __func__, __LINE__, error);
2228
2229 return error;
2230 }
2231
2232 if (!pm_runtime_status_suspended(dev)) {
2233 error = pm_generic_runtime_suspend(dev);
2234 if (error) {
2235 dev_dbg(dev, "%s busy at %i: %i\n",
2236 __func__, __LINE__, error);
2237
2238 return 0;
2239 }
2240
2241 error = sysc_runtime_suspend(ddata->dev);
2242 if (error) {
2243 dev_err(dev, "%s error at %i: %i\n",
2244 __func__, __LINE__, error);
2245
2246 return error;
2247 }
2248
2249 ddata->child_needs_resume = true;
2250 }
2251
2252 return 0;
2253 }
2254
2255 static int sysc_child_resume_noirq(struct device *dev)
2256 {
2257 struct sysc *ddata;
2258 int error;
2259
2260 ddata = sysc_child_to_parent(dev);
2261
2262 dev_dbg(ddata->dev, "%s %s\n", __func__,
2263 ddata->name ? ddata->name : "");
2264
2265 if (ddata->child_needs_resume) {
2266 ddata->child_needs_resume = false;
2267
2268 error = sysc_runtime_resume(ddata->dev);
2269 if (error)
2270 dev_err(ddata->dev,
2271 "%s runtime resume error: %i\n",
2272 __func__, error);
2273
2274 error = pm_generic_runtime_resume(dev);
2275 if (error)
2276 dev_err(ddata->dev,
2277 "%s generic runtime resume: %i\n",
2278 __func__, error);
2279 }
2280
2281 return pm_generic_resume_noirq(dev);
2282 }
2283 #endif
2284
2285 static struct dev_pm_domain sysc_child_pm_domain = {
2286 .ops = {
2287 SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
2288 sysc_child_runtime_resume,
2289 NULL)
2290 USE_PLATFORM_PM_SLEEP_OPS
2291 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
2292 sysc_child_resume_noirq)
2293 }
2294 };
2295
2296 /**
2297 * sysc_legacy_idle_quirk - handle children in omap_device compatible way
2298 * @ddata: device driver data
2299 * @child: child device driver
2300 *
2301 * Allow idle for child devices as done with _od_runtime_suspend().
2302 * Otherwise many child devices will not idle because of the permanent
2303 * parent usecount set in pm_runtime_irq_safe().
2304 *
2305 * Note that the long term solution is to just modify the child device
2306 * drivers to not set pm_runtime_irq_safe() and then this can be just
2307 * dropped.
2308 */
2309 static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
2310 {
2311 if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
2312 dev_pm_domain_set(child, &sysc_child_pm_domain);
2313 }
2314
2315 static int sysc_notifier_call(struct notifier_block *nb,
2316 unsigned long event, void *device)
2317 {
2318 struct device *dev = device;
2319 struct sysc *ddata;
2320 int error;
2321
2322 ddata = sysc_child_to_parent(dev);
2323 if (!ddata)
2324 return NOTIFY_DONE;
2325
2326 switch (event) {
2327 case BUS_NOTIFY_ADD_DEVICE:
2328 error = sysc_child_add_clocks(ddata, dev);
2329 if (error)
2330 return error;
2331 sysc_legacy_idle_quirk(ddata, dev);
2332 break;
2333 default:
2334 break;
2335 }
2336
2337 return NOTIFY_DONE;
2338 }
2339
2340 static struct notifier_block sysc_nb = {
2341 .notifier_call = sysc_notifier_call,
2342 };
2343
2344 /* Device tree configured quirks */
2345 struct sysc_dts_quirk {
2346 const char *name;
2347 u32 mask;
2348 };
2349
2350 static const struct sysc_dts_quirk sysc_dts_quirks[] = {
2351 { .name = "ti,no-idle-on-init",
2352 .mask = SYSC_QUIRK_NO_IDLE_ON_INIT, },
2353 { .name = "ti,no-reset-on-init",
2354 .mask = SYSC_QUIRK_NO_RESET_ON_INIT, },
2355 { .name = "ti,no-idle",
2356 .mask = SYSC_QUIRK_NO_IDLE, },
2357 };
2358
2359 static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
2360 bool is_child)
2361 {
2362 const struct property *prop;
2363 int i, len;
2364
2365 for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
2366 const char *name = sysc_dts_quirks[i].name;
2367
2368 prop = of_get_property(np, name, &len);
2369 if (!prop)
2370 continue;
2371
2372 ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
2373 if (is_child) {
2374 dev_warn(ddata->dev,
2375 "dts flag should be at module level for %s\n",
2376 name);
2377 }
2378 }
2379 }
2380
2381 static int sysc_init_dts_quirks(struct sysc *ddata)
2382 {
2383 struct device_node *np = ddata->dev->of_node;
2384 int error;
2385 u32 val;
2386
2387 ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL);
2388
2389 sysc_parse_dts_quirks(ddata, np, false);
2390 error = of_property_read_u32(np, "ti,sysc-delay-us", &val);
2391 if (!error) {
2392 if (val > 255) {
2393 dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n",
2394 val);
2395 }
2396
2397 ddata->cfg.srst_udelay = (u8)val;
2398 }
2399
2400 return 0;
2401 }
2402
2403 static void sysc_unprepare(struct sysc *ddata)
2404 {
2405 int i;
2406
2407 if (!ddata->clocks)
2408 return;
2409
2410 for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
2411 if (!IS_ERR_OR_NULL(ddata->clocks[i]))
2412 clk_unprepare(ddata->clocks[i]);
2413 }
2414 }
2415
2416 /*
2417 * Common sysc register bits found on omap2, also known as type1
2418 */
2419 static const struct sysc_regbits sysc_regbits_omap2 = {
2420 .dmadisable_shift = -ENODEV,
2421 .midle_shift = 12,
2422 .sidle_shift = 3,
2423 .clkact_shift = 8,
2424 .emufree_shift = 5,
2425 .enwkup_shift = 2,
2426 .srst_shift = 1,
2427 .autoidle_shift = 0,
2428 };
2429
2430 static const struct sysc_capabilities sysc_omap2 = {
2431 .type = TI_SYSC_OMAP2,
2432 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
2433 SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
2434 SYSC_OMAP2_AUTOIDLE,
2435 .regbits = &sysc_regbits_omap2,
2436 };
2437
2438 /* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */
2439 static const struct sysc_capabilities sysc_omap2_timer = {
2440 .type = TI_SYSC_OMAP2_TIMER,
2441 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
2442 SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
2443 SYSC_OMAP2_AUTOIDLE,
2444 .regbits = &sysc_regbits_omap2,
2445 .mod_quirks = SYSC_QUIRK_USE_CLOCKACT,
2446 };
2447
2448 /*
2449 * SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2
2450 * with different sidle position
2451 */
2452 static const struct sysc_regbits sysc_regbits_omap3_sham = {
2453 .dmadisable_shift = -ENODEV,
2454 .midle_shift = -ENODEV,
2455 .sidle_shift = 4,
2456 .clkact_shift = -ENODEV,
2457 .enwkup_shift = -ENODEV,
2458 .srst_shift = 1,
2459 .autoidle_shift = 0,
2460 .emufree_shift = -ENODEV,
2461 };
2462
2463 static const struct sysc_capabilities sysc_omap3_sham = {
2464 .type = TI_SYSC_OMAP3_SHAM,
2465 .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
2466 .regbits = &sysc_regbits_omap3_sham,
2467 };
2468
2469 /*
2470 * AES register bits found on omap3 and later, a variant of
2471 * sysc_regbits_omap2 with different sidle position
2472 */
2473 static const struct sysc_regbits sysc_regbits_omap3_aes = {
2474 .dmadisable_shift = -ENODEV,
2475 .midle_shift = -ENODEV,
2476 .sidle_shift = 6,
2477 .clkact_shift = -ENODEV,
2478 .enwkup_shift = -ENODEV,
2479 .srst_shift = 1,
2480 .autoidle_shift = 0,
2481 .emufree_shift = -ENODEV,
2482 };
2483
2484 static const struct sysc_capabilities sysc_omap3_aes = {
2485 .type = TI_SYSC_OMAP3_AES,
2486 .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
2487 .regbits = &sysc_regbits_omap3_aes,
2488 };
2489
2490 /*
2491 * Common sysc register bits found on omap4, also known as type2
2492 */
2493 static const struct sysc_regbits sysc_regbits_omap4 = {
2494 .dmadisable_shift = 16,
2495 .midle_shift = 4,
2496 .sidle_shift = 2,
2497 .clkact_shift = -ENODEV,
2498 .enwkup_shift = -ENODEV,
2499 .emufree_shift = 1,
2500 .srst_shift = 0,
2501 .autoidle_shift = -ENODEV,
2502 };
2503
2504 static const struct sysc_capabilities sysc_omap4 = {
2505 .type = TI_SYSC_OMAP4,
2506 .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
2507 SYSC_OMAP4_SOFTRESET,
2508 .regbits = &sysc_regbits_omap4,
2509 };
2510
2511 static const struct sysc_capabilities sysc_omap4_timer = {
2512 .type = TI_SYSC_OMAP4_TIMER,
2513 .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
2514 SYSC_OMAP4_SOFTRESET,
2515 .regbits = &sysc_regbits_omap4,
2516 };
2517
2518 /*
2519 * Common sysc register bits found on omap4, also known as type3
2520 */
2521 static const struct sysc_regbits sysc_regbits_omap4_simple = {
2522 .dmadisable_shift = -ENODEV,
2523 .midle_shift = 2,
2524 .sidle_shift = 0,
2525 .clkact_shift = -ENODEV,
2526 .enwkup_shift = -ENODEV,
2527 .srst_shift = -ENODEV,
2528 .emufree_shift = -ENODEV,
2529 .autoidle_shift = -ENODEV,
2530 };
2531
2532 static const struct sysc_capabilities sysc_omap4_simple = {
2533 .type = TI_SYSC_OMAP4_SIMPLE,
2534 .regbits = &sysc_regbits_omap4_simple,
2535 };
2536
2537 /*
2538 * SmartReflex sysc found on omap34xx
2539 */
2540 static const struct sysc_regbits sysc_regbits_omap34xx_sr = {
2541 .dmadisable_shift = -ENODEV,
2542 .midle_shift = -ENODEV,
2543 .sidle_shift = -ENODEV,
2544 .clkact_shift = 20,
2545 .enwkup_shift = -ENODEV,
2546 .srst_shift = -ENODEV,
2547 .emufree_shift = -ENODEV,
2548 .autoidle_shift = -ENODEV,
2549 };
2550
2551 static const struct sysc_capabilities sysc_34xx_sr = {
2552 .type = TI_SYSC_OMAP34XX_SR,
2553 .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
2554 .regbits = &sysc_regbits_omap34xx_sr,
2555 .mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
2556 SYSC_QUIRK_LEGACY_IDLE,
2557 };
2558
2559 /*
2560 * SmartReflex sysc found on omap36xx and later
2561 */
2562 static const struct sysc_regbits sysc_regbits_omap36xx_sr = {
2563 .dmadisable_shift = -ENODEV,
2564 .midle_shift = -ENODEV,
2565 .sidle_shift = 24,
2566 .clkact_shift = -ENODEV,
2567 .enwkup_shift = 26,
2568 .srst_shift = -ENODEV,
2569 .emufree_shift = -ENODEV,
2570 .autoidle_shift = -ENODEV,
2571 };
2572
2573 static const struct sysc_capabilities sysc_36xx_sr = {
2574 .type = TI_SYSC_OMAP36XX_SR,
2575 .sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
2576 .regbits = &sysc_regbits_omap36xx_sr,
2577 .mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
2578 };
2579
2580 static const struct sysc_capabilities sysc_omap4_sr = {
2581 .type = TI_SYSC_OMAP4_SR,
2582 .regbits = &sysc_regbits_omap36xx_sr,
2583 .mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
2584 };
2585
2586 /*
2587 * McASP register bits found on omap4 and later
2588 */
2589 static const struct sysc_regbits sysc_regbits_omap4_mcasp = {
2590 .dmadisable_shift = -ENODEV,
2591 .midle_shift = -ENODEV,
2592 .sidle_shift = 0,
2593 .clkact_shift = -ENODEV,
2594 .enwkup_shift = -ENODEV,
2595 .srst_shift = -ENODEV,
2596 .emufree_shift = -ENODEV,
2597 .autoidle_shift = -ENODEV,
2598 };
2599
2600 static const struct sysc_capabilities sysc_omap4_mcasp = {
2601 .type = TI_SYSC_OMAP4_MCASP,
2602 .regbits = &sysc_regbits_omap4_mcasp,
2603 .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
2604 };
2605
2606 /*
2607 * McASP found on dra7 and later
2608 */
2609 static const struct sysc_capabilities sysc_dra7_mcasp = {
2610 .type = TI_SYSC_OMAP4_SIMPLE,
2611 .regbits = &sysc_regbits_omap4_simple,
2612 .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
2613 };
2614
2615 /*
2616 * FS USB host found on omap4 and later
2617 */
2618 static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = {
2619 .dmadisable_shift = -ENODEV,
2620 .midle_shift = -ENODEV,
2621 .sidle_shift = 24,
2622 .clkact_shift = -ENODEV,
2623 .enwkup_shift = 26,
2624 .srst_shift = -ENODEV,
2625 .emufree_shift = -ENODEV,
2626 .autoidle_shift = -ENODEV,
2627 };
2628
2629 static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
2630 .type = TI_SYSC_OMAP4_USB_HOST_FS,
2631 .sysc_mask = SYSC_OMAP2_ENAWAKEUP,
2632 .regbits = &sysc_regbits_omap4_usb_host_fs,
2633 };
2634
2635 static const struct sysc_regbits sysc_regbits_dra7_mcan = {
2636 .dmadisable_shift = -ENODEV,
2637 .midle_shift = -ENODEV,
2638 .sidle_shift = -ENODEV,
2639 .clkact_shift = -ENODEV,
2640 .enwkup_shift = 4,
2641 .srst_shift = 0,
2642 .emufree_shift = -ENODEV,
2643 .autoidle_shift = -ENODEV,
2644 };
2645
2646 static const struct sysc_capabilities sysc_dra7_mcan = {
2647 .type = TI_SYSC_DRA7_MCAN,
2648 .sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
2649 .regbits = &sysc_regbits_dra7_mcan,
2650 .mod_quirks = SYSS_QUIRK_RESETDONE_INVERTED,
2651 };
2652
2653 /*
2654 * PRUSS found on some AM33xx, AM437x and AM57xx SoCs
2655 */
2656 static const struct sysc_capabilities sysc_pruss = {
2657 .type = TI_SYSC_PRUSS,
2658 .sysc_mask = SYSC_PRUSS_STANDBY_INIT | SYSC_PRUSS_SUB_MWAIT,
2659 .regbits = &sysc_regbits_omap4_simple,
2660 .mod_quirks = SYSC_MODULE_QUIRK_PRUSS,
2661 };
2662
2663 static int sysc_init_pdata(struct sysc *ddata)
2664 {
2665 struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
2666 struct ti_sysc_module_data *mdata;
2667
2668 if (!pdata)
2669 return 0;
2670
2671 mdata = devm_kzalloc(ddata->dev, sizeof(*mdata), GFP_KERNEL);
2672 if (!mdata)
2673 return -ENOMEM;
2674
2675 if (ddata->legacy_mode) {
2676 mdata->name = ddata->legacy_mode;
2677 mdata->module_pa = ddata->module_pa;
2678 mdata->module_size = ddata->module_size;
2679 mdata->offsets = ddata->offsets;
2680 mdata->nr_offsets = SYSC_MAX_REGS;
2681 mdata->cap = ddata->cap;
2682 mdata->cfg = &ddata->cfg;
2683 }
2684
2685 ddata->mdata = mdata;
2686
2687 return 0;
2688 }
2689
2690 static int sysc_init_match(struct sysc *ddata)
2691 {
2692 const struct sysc_capabilities *cap;
2693
2694 cap = of_device_get_match_data(ddata->dev);
2695 if (!cap)
2696 return -EINVAL;
2697
2698 ddata->cap = cap;
2699 if (ddata->cap)
2700 ddata->cfg.quirks |= ddata->cap->mod_quirks;
2701
2702 return 0;
2703 }
2704
2705 static void ti_sysc_idle(struct work_struct *work)
2706 {
2707 struct sysc *ddata;
2708
2709 ddata = container_of(work, struct sysc, idle_work.work);
2710
2711 /*
2712 * One time decrement of clock usage counts if left on from init.
2713 * Note that we disable opt clocks unconditionally in this case
2714 * as they are enabled unconditionally during init without
2715 * considering sysc_opt_clks_needed() at that point.
2716 */
2717 if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE |
2718 SYSC_QUIRK_NO_IDLE_ON_INIT)) {
2719 sysc_disable_main_clocks(ddata);
2720 sysc_disable_opt_clocks(ddata);
2721 sysc_clkdm_allow_idle(ddata);
2722 }
2723
2724 /* Keep permanent PM runtime usage count for SYSC_QUIRK_NO_IDLE */
2725 if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
2726 return;
2727
2728 /*
2729 * Decrement PM runtime usage count for SYSC_QUIRK_NO_IDLE_ON_INIT
2730 * and SYSC_QUIRK_NO_RESET_ON_INIT
2731 */
2732 if (pm_runtime_active(ddata->dev))
2733 pm_runtime_put_sync(ddata->dev);
2734 }
2735
2736 /*
2737 * SoC model and features detection. Only needed for SoCs that need
2738 * special handling for quirks, no need to list others.
2739 */
2740 static const struct soc_device_attribute sysc_soc_match[] = {
2741 SOC_FLAG("OMAP242*", SOC_2420),
2742 SOC_FLAG("OMAP243*", SOC_2430),
2743 SOC_FLAG("OMAP3[45]*", SOC_3430),
2744 SOC_FLAG("OMAP3[67]*", SOC_3630),
2745 SOC_FLAG("OMAP443*", SOC_4430),
2746 SOC_FLAG("OMAP446*", SOC_4460),
2747 SOC_FLAG("OMAP447*", SOC_4470),
2748 SOC_FLAG("OMAP54*", SOC_5430),
2749 SOC_FLAG("AM433", SOC_AM3),
2750 SOC_FLAG("AM43*", SOC_AM4),
2751 SOC_FLAG("DRA7*", SOC_DRA7),
2752
2753 { /* sentinel */ },
2754 };
2755
2756 /*
2757 * List of SoCs variants with disabled features. By default we assume all
2758 * devices in the device tree are available so no need to list those SoCs.
2759 */
2760 static const struct soc_device_attribute sysc_soc_feat_match[] = {
2761 /* OMAP3430/3530 and AM3517 variants with some accelerators disabled */
2762 SOC_FLAG("AM3505", DIS_SGX),
2763 SOC_FLAG("OMAP3525", DIS_SGX),
2764 SOC_FLAG("OMAP3515", DIS_IVA | DIS_SGX),
2765 SOC_FLAG("OMAP3503", DIS_ISP | DIS_IVA | DIS_SGX),
2766
2767 /* OMAP3630/DM3730 variants with some accelerators disabled */
2768 SOC_FLAG("AM3703", DIS_IVA | DIS_SGX),
2769 SOC_FLAG("DM3725", DIS_SGX),
2770 SOC_FLAG("OMAP3611", DIS_ISP | DIS_IVA | DIS_SGX),
2771 SOC_FLAG("OMAP3615/AM3715", DIS_IVA),
2772 SOC_FLAG("OMAP3621", DIS_ISP),
2773
2774 { /* sentinel */ },
2775 };
2776
2777 static int sysc_add_disabled(unsigned long base)
2778 {
2779 struct sysc_address *disabled_module;
2780
2781 disabled_module = kzalloc(sizeof(*disabled_module), GFP_KERNEL);
2782 if (!disabled_module)
2783 return -ENOMEM;
2784
2785 disabled_module->base = base;
2786
2787 mutex_lock(&sysc_soc->list_lock);
2788 list_add(&disabled_module->node, &sysc_soc->disabled_modules);
2789 mutex_unlock(&sysc_soc->list_lock);
2790
2791 return 0;
2792 }
2793
2794 /*
2795 * One time init to detect the booted SoC and disable unavailable features.
2796 * Note that we initialize static data shared across all ti-sysc instances
2797 * so ddata is only used for SoC type. This can be called from module_init
2798 * once we no longer need to rely on platform data.
2799 */
2800 static int sysc_init_soc(struct sysc *ddata)
2801 {
2802 const struct soc_device_attribute *match;
2803 struct ti_sysc_platform_data *pdata;
2804 unsigned long features = 0;
2805
2806 if (sysc_soc)
2807 return 0;
2808
2809 sysc_soc = kzalloc(sizeof(*sysc_soc), GFP_KERNEL);
2810 if (!sysc_soc)
2811 return -ENOMEM;
2812
2813 mutex_init(&sysc_soc->list_lock);
2814 INIT_LIST_HEAD(&sysc_soc->disabled_modules);
2815 sysc_soc->general_purpose = true;
2816
2817 pdata = dev_get_platdata(ddata->dev);
2818 if (pdata && pdata->soc_type_gp)
2819 sysc_soc->general_purpose = pdata->soc_type_gp();
2820
2821 match = soc_device_match(sysc_soc_match);
2822 if (match && match->data)
2823 sysc_soc->soc = (int)match->data;
2824
2825 /* Ignore devices that are not available on HS and EMU SoCs */
2826 if (!sysc_soc->general_purpose) {
2827 switch (sysc_soc->soc) {
2828 case SOC_3430 ... SOC_3630:
2829 sysc_add_disabled(0x48304000); /* timer12 */
2830 break;
2831 default:
2832 break;
2833 };
2834 }
2835
2836 match = soc_device_match(sysc_soc_feat_match);
2837 if (!match)
2838 return 0;
2839
2840 if (match->data)
2841 features = (unsigned long)match->data;
2842
2843 /*
2844 * Add disabled devices to the list based on the module base.
2845 * Note that this must be done before we attempt to access the
2846 * device and have module revision checks working.
2847 */
2848 if (features & DIS_ISP)
2849 sysc_add_disabled(0x480bd400);
2850 if (features & DIS_IVA)
2851 sysc_add_disabled(0x5d000000);
2852 if (features & DIS_SGX)
2853 sysc_add_disabled(0x50000000);
2854
2855 return 0;
2856 }
2857
2858 static void sysc_cleanup_soc(void)
2859 {
2860 struct sysc_address *disabled_module;
2861 struct list_head *pos, *tmp;
2862
2863 if (!sysc_soc)
2864 return;
2865
2866 mutex_lock(&sysc_soc->list_lock);
2867 list_for_each_safe(pos, tmp, &sysc_soc->disabled_modules) {
2868 disabled_module = list_entry(pos, struct sysc_address, node);
2869 list_del(pos);
2870 kfree(disabled_module);
2871 }
2872 mutex_unlock(&sysc_soc->list_lock);
2873 }
2874
2875 static int sysc_check_disabled_devices(struct sysc *ddata)
2876 {
2877 struct sysc_address *disabled_module;
2878 struct list_head *pos;
2879 int error = 0;
2880
2881 mutex_lock(&sysc_soc->list_lock);
2882 list_for_each(pos, &sysc_soc->disabled_modules) {
2883 disabled_module = list_entry(pos, struct sysc_address, node);
2884 if (ddata->module_pa == disabled_module->base) {
2885 dev_dbg(ddata->dev, "module disabled for this SoC\n");
2886 error = -ENODEV;
2887 break;
2888 }
2889 }
2890 mutex_unlock(&sysc_soc->list_lock);
2891
2892 return error;
2893 }
2894
2895 /*
2896 * Ignore timers tagged with no-reset and no-idle. These are likely in use,
2897 * for example by drivers/clocksource/timer-ti-dm-systimer.c. If more checks
2898 * are needed, we could also look at the timer register configuration.
2899 */
2900 static int sysc_check_active_timer(struct sysc *ddata)
2901 {
2902 if (ddata->cap->type != TI_SYSC_OMAP2_TIMER &&
2903 ddata->cap->type != TI_SYSC_OMAP4_TIMER)
2904 return 0;
2905
2906 if ((ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT) &&
2907 (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE))
2908 return -ENXIO;
2909
2910 return 0;
2911 }
2912
2913 static const struct of_device_id sysc_match_table[] = {
2914 { .compatible = "simple-bus", },
2915 { /* sentinel */ },
2916 };
2917
2918 static int sysc_probe(struct platform_device *pdev)
2919 {
2920 struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev);
2921 struct sysc *ddata;
2922 int error;
2923
2924 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
2925 if (!ddata)
2926 return -ENOMEM;
2927
2928 ddata->offsets[SYSC_REVISION] = -ENODEV;
2929 ddata->offsets[SYSC_SYSCONFIG] = -ENODEV;
2930 ddata->offsets[SYSC_SYSSTATUS] = -ENODEV;
2931 ddata->dev = &pdev->dev;
2932 platform_set_drvdata(pdev, ddata);
2933
2934 error = sysc_init_soc(ddata);
2935 if (error)
2936 return error;
2937
2938 error = sysc_init_match(ddata);
2939 if (error)
2940 return error;
2941
2942 error = sysc_init_dts_quirks(ddata);
2943 if (error)
2944 return error;
2945
2946 error = sysc_map_and_check_registers(ddata);
2947 if (error)
2948 return error;
2949
2950 error = sysc_init_sysc_mask(ddata);
2951 if (error)
2952 return error;
2953
2954 error = sysc_init_idlemodes(ddata);
2955 if (error)
2956 return error;
2957
2958 error = sysc_init_syss_mask(ddata);
2959 if (error)
2960 return error;
2961
2962 error = sysc_init_pdata(ddata);
2963 if (error)
2964 return error;
2965
2966 sysc_init_early_quirks(ddata);
2967
2968 error = sysc_check_disabled_devices(ddata);
2969 if (error)
2970 return error;
2971
2972 error = sysc_check_active_timer(ddata);
2973 if (error)
2974 return error;
2975
2976 error = sysc_get_clocks(ddata);
2977 if (error)
2978 return error;
2979
2980 error = sysc_init_resets(ddata);
2981 if (error)
2982 goto unprepare;
2983
2984 error = sysc_init_module(ddata);
2985 if (error)
2986 goto unprepare;
2987
2988 pm_runtime_enable(ddata->dev);
2989 error = pm_runtime_get_sync(ddata->dev);
2990 if (error < 0) {
2991 pm_runtime_put_noidle(ddata->dev);
2992 pm_runtime_disable(ddata->dev);
2993 goto unprepare;
2994 }
2995
2996 /* Balance use counts as PM runtime should have enabled these all */
2997 if (!(ddata->cfg.quirks &
2998 (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))) {
2999 sysc_disable_main_clocks(ddata);
3000 sysc_disable_opt_clocks(ddata);
3001 sysc_clkdm_allow_idle(ddata);
3002 }
3003
3004 if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT))
3005 reset_control_assert(ddata->rsts);
3006
3007 sysc_show_registers(ddata);
3008
3009 ddata->dev->type = &sysc_device_type;
3010 error = of_platform_populate(ddata->dev->of_node, sysc_match_table,
3011 pdata ? pdata->auxdata : NULL,
3012 ddata->dev);
3013 if (error)
3014 goto err;
3015
3016 INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle);
3017
3018 /* At least earlycon won't survive without deferred idle */
3019 if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE |
3020 SYSC_QUIRK_NO_IDLE_ON_INIT |
3021 SYSC_QUIRK_NO_RESET_ON_INIT)) {
3022 schedule_delayed_work(&ddata->idle_work, 3000);
3023 } else {
3024 pm_runtime_put(&pdev->dev);
3025 }
3026
3027 return 0;
3028
3029 err:
3030 pm_runtime_put_sync(&pdev->dev);
3031 pm_runtime_disable(&pdev->dev);
3032 unprepare:
3033 sysc_unprepare(ddata);
3034
3035 return error;
3036 }
3037
3038 static int sysc_remove(struct platform_device *pdev)
3039 {
3040 struct sysc *ddata = platform_get_drvdata(pdev);
3041 int error;
3042
3043 cancel_delayed_work_sync(&ddata->idle_work);
3044
3045 error = pm_runtime_get_sync(ddata->dev);
3046 if (error < 0) {
3047 pm_runtime_put_noidle(ddata->dev);
3048 pm_runtime_disable(ddata->dev);
3049 goto unprepare;
3050 }
3051
3052 of_platform_depopulate(&pdev->dev);
3053
3054 pm_runtime_put_sync(&pdev->dev);
3055 pm_runtime_disable(&pdev->dev);
3056 reset_control_assert(ddata->rsts);
3057
3058 unprepare:
3059 sysc_unprepare(ddata);
3060
3061 return 0;
3062 }
3063
3064 static const struct of_device_id sysc_match[] = {
3065 { .compatible = "ti,sysc-omap2", .data = &sysc_omap2, },
3066 { .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, },
3067 { .compatible = "ti,sysc-omap4", .data = &sysc_omap4, },
3068 { .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, },
3069 { .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, },
3070 { .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, },
3071 { .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, },
3072 { .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, },
3073 { .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, },
3074 { .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, },
3075 { .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
3076 { .compatible = "ti,sysc-dra7-mcasp", .data = &sysc_dra7_mcasp, },
3077 { .compatible = "ti,sysc-usb-host-fs",
3078 .data = &sysc_omap4_usb_host_fs, },
3079 { .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
3080 { .compatible = "ti,sysc-pruss", .data = &sysc_pruss, },
3081 { },
3082 };
3083 MODULE_DEVICE_TABLE(of, sysc_match);
3084
3085 static struct platform_driver sysc_driver = {
3086 .probe = sysc_probe,
3087 .remove = sysc_remove,
3088 .driver = {
3089 .name = "ti-sysc",
3090 .of_match_table = sysc_match,
3091 .pm = &sysc_pm_ops,
3092 },
3093 };
3094
3095 static int __init sysc_init(void)
3096 {
3097 bus_register_notifier(&platform_bus_type, &sysc_nb);
3098
3099 return platform_driver_register(&sysc_driver);
3100 }
3101 module_init(sysc_init);
3102
3103 static void __exit sysc_exit(void)
3104 {
3105 bus_unregister_notifier(&platform_bus_type, &sysc_nb);
3106 platform_driver_unregister(&sysc_driver);
3107 sysc_cleanup_soc();
3108 }
3109 module_exit(sysc_exit);
3110
3111 MODULE_DESCRIPTION("TI sysc interconnect target driver");
3112 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support