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rcu: Maintain special bits at bottom of ->dynticks counter
[linux/fpc-iii.git] / drivers / soc / tegra / pmc.c
blobe233dd5dcab3d711f9c5573ffdb918436f4853df
1 /*
2 * drivers/soc/tegra/pmc.c
3 *
4 * Copyright (c) 2010 Google, Inc
5 *
6 * Author:
7 * Colin Cross <ccross@google.com>
8 *
9 * This software is licensed under the terms of the GNU General Public
10 * License version 2, as published by the Free Software Foundation, and
11 * may be copied, distributed, and modified under those terms.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 */
19
20 #define pr_fmt(fmt) "tegra-pmc: " fmt
21
22 #include <linux/kernel.h>
23 #include <linux/clk.h>
24 #include <linux/clk/tegra.h>
25 #include <linux/debugfs.h>
26 #include <linux/delay.h>
27 #include <linux/err.h>
28 #include <linux/export.h>
29 #include <linux/init.h>
30 #include <linux/io.h>
31 #include <linux/iopoll.h>
32 #include <linux/of.h>
33 #include <linux/of_address.h>
34 #include <linux/of_platform.h>
35 #include <linux/platform_device.h>
36 #include <linux/pm_domain.h>
37 #include <linux/reboot.h>
38 #include <linux/reset.h>
39 #include <linux/seq_file.h>
40 #include <linux/slab.h>
41 #include <linux/spinlock.h>
42
43 #include <soc/tegra/common.h>
44 #include <soc/tegra/fuse.h>
45 #include <soc/tegra/pmc.h>
46
47 #define PMC_CNTRL 0x0
48 #define PMC_CNTRL_INTR_POLARITY BIT(17) /* inverts INTR polarity */
49 #define PMC_CNTRL_CPU_PWRREQ_OE BIT(16) /* CPU pwr req enable */
50 #define PMC_CNTRL_CPU_PWRREQ_POLARITY BIT(15) /* CPU pwr req polarity */
51 #define PMC_CNTRL_SIDE_EFFECT_LP0 BIT(14) /* LP0 when CPU pwr gated */
52 #define PMC_CNTRL_SYSCLK_OE BIT(11) /* system clock enable */
53 #define PMC_CNTRL_SYSCLK_POLARITY BIT(10) /* sys clk polarity */
54 #define PMC_CNTRL_MAIN_RST BIT(4)
55
56 #define DPD_SAMPLE 0x020
57 #define DPD_SAMPLE_ENABLE BIT(0)
58 #define DPD_SAMPLE_DISABLE (0 << 0)
59
60 #define PWRGATE_TOGGLE 0x30
61 #define PWRGATE_TOGGLE_START BIT(8)
62
63 #define REMOVE_CLAMPING 0x34
64
65 #define PWRGATE_STATUS 0x38
66
67 #define PMC_PWR_DET 0x48
68
69 #define PMC_SCRATCH0 0x50
70 #define PMC_SCRATCH0_MODE_RECOVERY BIT(31)
71 #define PMC_SCRATCH0_MODE_BOOTLOADER BIT(30)
72 #define PMC_SCRATCH0_MODE_RCM BIT(1)
73 #define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \
74 PMC_SCRATCH0_MODE_BOOTLOADER | \
75 PMC_SCRATCH0_MODE_RCM)
76
77 #define PMC_CPUPWRGOOD_TIMER 0xc8
78 #define PMC_CPUPWROFF_TIMER 0xcc
79
80 #define PMC_PWR_DET_VALUE 0xe4
81
82 #define PMC_SCRATCH41 0x140
83
84 #define PMC_SENSOR_CTRL 0x1b0
85 #define PMC_SENSOR_CTRL_SCRATCH_WRITE BIT(2)
86 #define PMC_SENSOR_CTRL_ENABLE_RST BIT(1)
87
88 #define PMC_RST_STATUS 0x1b4
89 #define PMC_RST_STATUS_POR 0
90 #define PMC_RST_STATUS_WATCHDOG 1
91 #define PMC_RST_STATUS_SENSOR 2
92 #define PMC_RST_STATUS_SW_MAIN 3
93 #define PMC_RST_STATUS_LP0 4
94 #define PMC_RST_STATUS_AOTAG 5
95
96 #define IO_DPD_REQ 0x1b8
97 #define IO_DPD_REQ_CODE_IDLE (0U << 30)
98 #define IO_DPD_REQ_CODE_OFF (1U << 30)
99 #define IO_DPD_REQ_CODE_ON (2U << 30)
100 #define IO_DPD_REQ_CODE_MASK (3U << 30)
101
102 #define IO_DPD_STATUS 0x1bc
103 #define IO_DPD2_REQ 0x1c0
104 #define IO_DPD2_STATUS 0x1c4
105 #define SEL_DPD_TIM 0x1c8
106
107 #define PMC_SCRATCH54 0x258
108 #define PMC_SCRATCH54_DATA_SHIFT 8
109 #define PMC_SCRATCH54_ADDR_SHIFT 0
110
111 #define PMC_SCRATCH55 0x25c
112 #define PMC_SCRATCH55_RESET_TEGRA BIT(31)
113 #define PMC_SCRATCH55_CNTRL_ID_SHIFT 27
114 #define PMC_SCRATCH55_PINMUX_SHIFT 24
115 #define PMC_SCRATCH55_16BITOP BIT(15)
116 #define PMC_SCRATCH55_CHECKSUM_SHIFT 16
117 #define PMC_SCRATCH55_I2CSLV1_SHIFT 0
118
119 #define GPU_RG_CNTRL 0x2d4
120
121 struct tegra_powergate {
122 struct generic_pm_domain genpd;
123 struct tegra_pmc *pmc;
124 unsigned int id;
125 struct clk **clks;
126 unsigned int num_clks;
127 struct reset_control **resets;
128 unsigned int num_resets;
129 };
130
131 struct tegra_io_pad_soc {
132 enum tegra_io_pad id;
133 unsigned int dpd;
134 unsigned int voltage;
135 };
136
137 struct tegra_pmc_soc {
138 unsigned int num_powergates;
139 const char *const *powergates;
140 unsigned int num_cpu_powergates;
141 const u8 *cpu_powergates;
142
143 bool has_tsense_reset;
144 bool has_gpu_clamps;
145
146 const struct tegra_io_pad_soc *io_pads;
147 unsigned int num_io_pads;
148 };
149
150 /**
151 * struct tegra_pmc - NVIDIA Tegra PMC
152 * @dev: pointer to PMC device structure
153 * @base: pointer to I/O remapped register region
154 * @clk: pointer to pclk clock
155 * @soc: pointer to SoC data structure
156 * @debugfs: pointer to debugfs entry
157 * @rate: currently configured rate of pclk
158 * @suspend_mode: lowest suspend mode available
159 * @cpu_good_time: CPU power good time (in microseconds)
160 * @cpu_off_time: CPU power off time (in microsecends)
161 * @core_osc_time: core power good OSC time (in microseconds)
162 * @core_pmu_time: core power good PMU time (in microseconds)
163 * @core_off_time: core power off time (in microseconds)
164 * @corereq_high: core power request is active-high
165 * @sysclkreq_high: system clock request is active-high
166 * @combined_req: combined power request for CPU & core
167 * @cpu_pwr_good_en: CPU power good signal is enabled
168 * @lp0_vec_phys: physical base address of the LP0 warm boot code
169 * @lp0_vec_size: size of the LP0 warm boot code
170 * @powergates_available: Bitmap of available power gates
171 * @powergates_lock: mutex for power gate register access
172 */
173 struct tegra_pmc {
174 struct device *dev;
175 void __iomem *base;
176 struct clk *clk;
177 struct dentry *debugfs;
178
179 const struct tegra_pmc_soc *soc;
180
181 unsigned long rate;
182
183 enum tegra_suspend_mode suspend_mode;
184 u32 cpu_good_time;
185 u32 cpu_off_time;
186 u32 core_osc_time;
187 u32 core_pmu_time;
188 u32 core_off_time;
189 bool corereq_high;
190 bool sysclkreq_high;
191 bool combined_req;
192 bool cpu_pwr_good_en;
193 u32 lp0_vec_phys;
194 u32 lp0_vec_size;
195 DECLARE_BITMAP(powergates_available, TEGRA_POWERGATE_MAX);
196
197 struct mutex powergates_lock;
198 };
199
200 static struct tegra_pmc *pmc = &(struct tegra_pmc) {
201 .base = NULL,
202 .suspend_mode = TEGRA_SUSPEND_NONE,
203 };
204
205 static inline struct tegra_powergate *
206 to_powergate(struct generic_pm_domain *domain)
207 {
208 return container_of(domain, struct tegra_powergate, genpd);
209 }
210
211 static u32 tegra_pmc_readl(unsigned long offset)
212 {
213 return readl(pmc->base + offset);
214 }
215
216 static void tegra_pmc_writel(u32 value, unsigned long offset)
217 {
218 writel(value, pmc->base + offset);
219 }
220
221 static inline bool tegra_powergate_state(int id)
222 {
223 if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
224 return (tegra_pmc_readl(GPU_RG_CNTRL) & 0x1) == 0;
225 else
226 return (tegra_pmc_readl(PWRGATE_STATUS) & BIT(id)) != 0;
227 }
228
229 static inline bool tegra_powergate_is_valid(int id)
230 {
231 return (pmc->soc && pmc->soc->powergates[id]);
232 }
233
234 static inline bool tegra_powergate_is_available(int id)
235 {
236 return test_bit(id, pmc->powergates_available);
237 }
238
239 static int tegra_powergate_lookup(struct tegra_pmc *pmc, const char *name)
240 {
241 unsigned int i;
242
243 if (!pmc || !pmc->soc || !name)
244 return -EINVAL;
245
246 for (i = 0; i < pmc->soc->num_powergates; i++) {
247 if (!tegra_powergate_is_valid(i))
248 continue;
249
250 if (!strcmp(name, pmc->soc->powergates[i]))
251 return i;
252 }
253
254 return -ENODEV;
255 }
256
257 /**
258 * tegra_powergate_set() - set the state of a partition
259 * @id: partition ID
260 * @new_state: new state of the partition
261 */
262 static int tegra_powergate_set(unsigned int id, bool new_state)
263 {
264 bool status;
265 int err;
266
267 if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
268 return -EINVAL;
269
270 mutex_lock(&pmc->powergates_lock);
271
272 if (tegra_powergate_state(id) == new_state) {
273 mutex_unlock(&pmc->powergates_lock);
274 return 0;
275 }
276
277 tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
278
279 err = readx_poll_timeout(tegra_powergate_state, id, status,
280 status == new_state, 10, 100000);
281
282 mutex_unlock(&pmc->powergates_lock);
283
284 return err;
285 }
286
287 static int __tegra_powergate_remove_clamping(unsigned int id)
288 {
289 u32 mask;
290
291 mutex_lock(&pmc->powergates_lock);
292
293 /*
294 * On Tegra124 and later, the clamps for the GPU are controlled by a
295 * separate register (with different semantics).
296 */
297 if (id == TEGRA_POWERGATE_3D) {
298 if (pmc->soc->has_gpu_clamps) {
299 tegra_pmc_writel(0, GPU_RG_CNTRL);
300 goto out;
301 }
302 }
303
304 /*
305 * Tegra 2 has a bug where PCIE and VDE clamping masks are
306 * swapped relatively to the partition ids
307 */
308 if (id == TEGRA_POWERGATE_VDEC)
309 mask = (1 << TEGRA_POWERGATE_PCIE);
310 else if (id == TEGRA_POWERGATE_PCIE)
311 mask = (1 << TEGRA_POWERGATE_VDEC);
312 else
313 mask = (1 << id);
314
315 tegra_pmc_writel(mask, REMOVE_CLAMPING);
316
317 out:
318 mutex_unlock(&pmc->powergates_lock);
319
320 return 0;
321 }
322
323 static void tegra_powergate_disable_clocks(struct tegra_powergate *pg)
324 {
325 unsigned int i;
326
327 for (i = 0; i < pg->num_clks; i++)
328 clk_disable_unprepare(pg->clks[i]);
329 }
330
331 static int tegra_powergate_enable_clocks(struct tegra_powergate *pg)
332 {
333 unsigned int i;
334 int err;
335
336 for (i = 0; i < pg->num_clks; i++) {
337 err = clk_prepare_enable(pg->clks[i]);
338 if (err)
339 goto out;
340 }
341
342 return 0;
343
344 out:
345 while (i--)
346 clk_disable_unprepare(pg->clks[i]);
347
348 return err;
349 }
350
351 static int tegra_powergate_reset_assert(struct tegra_powergate *pg)
352 {
353 unsigned int i;
354 int err;
355
356 for (i = 0; i < pg->num_resets; i++) {
357 err = reset_control_assert(pg->resets[i]);
358 if (err)
359 return err;
360 }
361
362 return 0;
363 }
364
365 static int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
366 {
367 unsigned int i;
368 int err;
369
370 for (i = 0; i < pg->num_resets; i++) {
371 err = reset_control_deassert(pg->resets[i]);
372 if (err)
373 return err;
374 }
375
376 return 0;
377 }
378
379 static int tegra_powergate_power_up(struct tegra_powergate *pg,
380 bool disable_clocks)
381 {
382 int err;
383
384 err = tegra_powergate_reset_assert(pg);
385 if (err)
386 return err;
387
388 usleep_range(10, 20);
389
390 err = tegra_powergate_set(pg->id, true);
391 if (err < 0)
392 return err;
393
394 usleep_range(10, 20);
395
396 err = tegra_powergate_enable_clocks(pg);
397 if (err)
398 goto disable_clks;
399
400 usleep_range(10, 20);
401
402 err = __tegra_powergate_remove_clamping(pg->id);
403 if (err)
404 goto disable_clks;
405
406 usleep_range(10, 20);
407
408 err = tegra_powergate_reset_deassert(pg);
409 if (err)
410 goto powergate_off;
411
412 usleep_range(10, 20);
413
414 if (disable_clocks)
415 tegra_powergate_disable_clocks(pg);
416
417 return 0;
418
419 disable_clks:
420 tegra_powergate_disable_clocks(pg);
421 usleep_range(10, 20);
422
423 powergate_off:
424 tegra_powergate_set(pg->id, false);
425
426 return err;
427 }
428
429 static int tegra_powergate_power_down(struct tegra_powergate *pg)
430 {
431 int err;
432
433 err = tegra_powergate_enable_clocks(pg);
434 if (err)
435 return err;
436
437 usleep_range(10, 20);
438
439 err = tegra_powergate_reset_assert(pg);
440 if (err)
441 goto disable_clks;
442
443 usleep_range(10, 20);
444
445 tegra_powergate_disable_clocks(pg);
446
447 usleep_range(10, 20);
448
449 err = tegra_powergate_set(pg->id, false);
450 if (err)
451 goto assert_resets;
452
453 return 0;
454
455 assert_resets:
456 tegra_powergate_enable_clocks(pg);
457 usleep_range(10, 20);
458 tegra_powergate_reset_deassert(pg);
459 usleep_range(10, 20);
460
461 disable_clks:
462 tegra_powergate_disable_clocks(pg);
463
464 return err;
465 }
466
467 static int tegra_genpd_power_on(struct generic_pm_domain *domain)
468 {
469 struct tegra_powergate *pg = to_powergate(domain);
470 int err;
471
472 err = tegra_powergate_power_up(pg, true);
473 if (err)
474 pr_err("failed to turn on PM domain %s: %d\n", pg->genpd.name,
475 err);
476
477 return err;
478 }
479
480 static int tegra_genpd_power_off(struct generic_pm_domain *domain)
481 {
482 struct tegra_powergate *pg = to_powergate(domain);
483 int err;
484
485 err = tegra_powergate_power_down(pg);
486 if (err)
487 pr_err("failed to turn off PM domain %s: %d\n",
488 pg->genpd.name, err);
489
490 return err;
491 }
492
493 /**
494 * tegra_powergate_power_on() - power on partition
495 * @id: partition ID
496 */
497 int tegra_powergate_power_on(unsigned int id)
498 {
499 if (!tegra_powergate_is_available(id))
500 return -EINVAL;
501
502 return tegra_powergate_set(id, true);
503 }
504
505 /**
506 * tegra_powergate_power_off() - power off partition
507 * @id: partition ID
508 */
509 int tegra_powergate_power_off(unsigned int id)
510 {
511 if (!tegra_powergate_is_available(id))
512 return -EINVAL;
513
514 return tegra_powergate_set(id, false);
515 }
516 EXPORT_SYMBOL(tegra_powergate_power_off);
517
518 /**
519 * tegra_powergate_is_powered() - check if partition is powered
520 * @id: partition ID
521 */
522 int tegra_powergate_is_powered(unsigned int id)
523 {
524 int status;
525
526 if (!tegra_powergate_is_valid(id))
527 return -EINVAL;
528
529 mutex_lock(&pmc->powergates_lock);
530 status = tegra_powergate_state(id);
531 mutex_unlock(&pmc->powergates_lock);
532
533 return status;
534 }
535
536 /**
537 * tegra_powergate_remove_clamping() - remove power clamps for partition
538 * @id: partition ID
539 */
540 int tegra_powergate_remove_clamping(unsigned int id)
541 {
542 if (!tegra_powergate_is_available(id))
543 return -EINVAL;
544
545 return __tegra_powergate_remove_clamping(id);
546 }
547 EXPORT_SYMBOL(tegra_powergate_remove_clamping);
548
549 /**
550 * tegra_powergate_sequence_power_up() - power up partition
551 * @id: partition ID
552 * @clk: clock for partition
553 * @rst: reset for partition
554 *
555 * Must be called with clk disabled, and returns with clk enabled.
556 */
557 int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
558 struct reset_control *rst)
559 {
560 struct tegra_powergate pg;
561 int err;
562
563 if (!tegra_powergate_is_available(id))
564 return -EINVAL;
565
566 pg.id = id;
567 pg.clks = &clk;
568 pg.num_clks = 1;
569 pg.resets = &rst;
570 pg.num_resets = 1;
571
572 err = tegra_powergate_power_up(&pg, false);
573 if (err)
574 pr_err("failed to turn on partition %d: %d\n", id, err);
575
576 return err;
577 }
578 EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
579
580 #ifdef CONFIG_SMP
581 /**
582 * tegra_get_cpu_powergate_id() - convert from CPU ID to partition ID
583 * @cpuid: CPU partition ID
584 *
585 * Returns the partition ID corresponding to the CPU partition ID or a
586 * negative error code on failure.
587 */
588 static int tegra_get_cpu_powergate_id(unsigned int cpuid)
589 {
590 if (pmc->soc && cpuid < pmc->soc->num_cpu_powergates)
591 return pmc->soc->cpu_powergates[cpuid];
592
593 return -EINVAL;
594 }
595
596 /**
597 * tegra_pmc_cpu_is_powered() - check if CPU partition is powered
598 * @cpuid: CPU partition ID
599 */
600 bool tegra_pmc_cpu_is_powered(unsigned int cpuid)
601 {
602 int id;
603
604 id = tegra_get_cpu_powergate_id(cpuid);
605 if (id < 0)
606 return false;
607
608 return tegra_powergate_is_powered(id);
609 }
610
611 /**
612 * tegra_pmc_cpu_power_on() - power on CPU partition
613 * @cpuid: CPU partition ID
614 */
615 int tegra_pmc_cpu_power_on(unsigned int cpuid)
616 {
617 int id;
618
619 id = tegra_get_cpu_powergate_id(cpuid);
620 if (id < 0)
621 return id;
622
623 return tegra_powergate_set(id, true);
624 }
625
626 /**
627 * tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
628 * @cpuid: CPU partition ID
629 */
630 int tegra_pmc_cpu_remove_clamping(unsigned int cpuid)
631 {
632 int id;
633
634 id = tegra_get_cpu_powergate_id(cpuid);
635 if (id < 0)
636 return id;
637
638 return tegra_powergate_remove_clamping(id);
639 }
640 #endif /* CONFIG_SMP */
641
642 static int tegra_pmc_restart_notify(struct notifier_block *this,
643 unsigned long action, void *data)
644 {
645 const char *cmd = data;
646 u32 value;
647
648 value = tegra_pmc_readl(PMC_SCRATCH0);
649 value &= ~PMC_SCRATCH0_MODE_MASK;
650
651 if (cmd) {
652 if (strcmp(cmd, "recovery") == 0)
653 value |= PMC_SCRATCH0_MODE_RECOVERY;
654
655 if (strcmp(cmd, "bootloader") == 0)
656 value |= PMC_SCRATCH0_MODE_BOOTLOADER;
657
658 if (strcmp(cmd, "forced-recovery") == 0)
659 value |= PMC_SCRATCH0_MODE_RCM;
660 }
661
662 tegra_pmc_writel(value, PMC_SCRATCH0);
663
664 /* reset everything but PMC_SCRATCH0 and PMC_RST_STATUS */
665 value = tegra_pmc_readl(PMC_CNTRL);
666 value |= PMC_CNTRL_MAIN_RST;
667 tegra_pmc_writel(value, PMC_CNTRL);
668
669 return NOTIFY_DONE;
670 }
671
672 static struct notifier_block tegra_pmc_restart_handler = {
673 .notifier_call = tegra_pmc_restart_notify,
674 .priority = 128,
675 };
676
677 static int powergate_show(struct seq_file *s, void *data)
678 {
679 unsigned int i;
680 int status;
681
682 seq_printf(s, " powergate powered\n");
683 seq_printf(s, "------------------\n");
684
685 for (i = 0; i < pmc->soc->num_powergates; i++) {
686 status = tegra_powergate_is_powered(i);
687 if (status < 0)
688 continue;
689
690 seq_printf(s, " %9s %7s\n", pmc->soc->powergates[i],
691 status ? "yes" : "no");
692 }
693
694 return 0;
695 }
696
697 static int powergate_open(struct inode *inode, struct file *file)
698 {
699 return single_open(file, powergate_show, inode->i_private);
700 }
701
702 static const struct file_operations powergate_fops = {
703 .open = powergate_open,
704 .read = seq_read,
705 .llseek = seq_lseek,
706 .release = single_release,
707 };
708
709 static int tegra_powergate_debugfs_init(void)
710 {
711 pmc->debugfs = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
712 &powergate_fops);
713 if (!pmc->debugfs)
714 return -ENOMEM;
715
716 return 0;
717 }
718
719 static int tegra_powergate_of_get_clks(struct tegra_powergate *pg,
720 struct device_node *np)
721 {
722 struct clk *clk;
723 unsigned int i, count;
724 int err;
725
726 count = of_count_phandle_with_args(np, "clocks", "#clock-cells");
727 if (count == 0)
728 return -ENODEV;
729
730 pg->clks = kcalloc(count, sizeof(clk), GFP_KERNEL);
731 if (!pg->clks)
732 return -ENOMEM;
733
734 for (i = 0; i < count; i++) {
735 pg->clks[i] = of_clk_get(np, i);
736 if (IS_ERR(pg->clks[i])) {
737 err = PTR_ERR(pg->clks[i]);
738 goto err;
739 }
740 }
741
742 pg->num_clks = count;
743
744 return 0;
745
746 err:
747 while (i--)
748 clk_put(pg->clks[i]);
749
750 kfree(pg->clks);
751
752 return err;
753 }
754
755 static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
756 struct device_node *np, bool off)
757 {
758 struct reset_control *rst;
759 unsigned int i, count;
760 int err;
761
762 count = of_count_phandle_with_args(np, "resets", "#reset-cells");
763 if (count == 0)
764 return -ENODEV;
765
766 pg->resets = kcalloc(count, sizeof(rst), GFP_KERNEL);
767 if (!pg->resets)
768 return -ENOMEM;
769
770 for (i = 0; i < count; i++) {
771 pg->resets[i] = of_reset_control_get_by_index(np, i);
772 if (IS_ERR(pg->resets[i])) {
773 err = PTR_ERR(pg->resets[i]);
774 goto error;
775 }
776
777 if (off)
778 err = reset_control_assert(pg->resets[i]);
779 else
780 err = reset_control_deassert(pg->resets[i]);
781
782 if (err) {
783 reset_control_put(pg->resets[i]);
784 goto error;
785 }
786 }
787
788 pg->num_resets = count;
789
790 return 0;
791
792 error:
793 while (i--)
794 reset_control_put(pg->resets[i]);
795
796 kfree(pg->resets);
797
798 return err;
799 }
800
801 static void tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np)
802 {
803 struct tegra_powergate *pg;
804 int id, err;
805 bool off;
806
807 pg = kzalloc(sizeof(*pg), GFP_KERNEL);
808 if (!pg)
809 return;
810
811 id = tegra_powergate_lookup(pmc, np->name);
812 if (id < 0) {
813 pr_err("powergate lookup failed for %s: %d\n", np->name, id);
814 goto free_mem;
815 }
816
817 /*
818 * Clear the bit for this powergate so it cannot be managed
819 * directly via the legacy APIs for controlling powergates.
820 */
821 clear_bit(id, pmc->powergates_available);
822
823 pg->id = id;
824 pg->genpd.name = np->name;
825 pg->genpd.power_off = tegra_genpd_power_off;
826 pg->genpd.power_on = tegra_genpd_power_on;
827 pg->pmc = pmc;
828
829 off = !tegra_powergate_is_powered(pg->id);
830
831 err = tegra_powergate_of_get_clks(pg, np);
832 if (err < 0) {
833 pr_err("failed to get clocks for %s: %d\n", np->name, err);
834 goto set_available;
835 }
836
837 err = tegra_powergate_of_get_resets(pg, np, off);
838 if (err < 0) {
839 pr_err("failed to get resets for %s: %d\n", np->name, err);
840 goto remove_clks;
841 }
842
843 if (!IS_ENABLED(CONFIG_PM_GENERIC_DOMAINS)) {
844 if (off)
845 WARN_ON(tegra_powergate_power_up(pg, true));
846
847 goto remove_resets;
848 }
849
850 /*
851 * FIXME: If XHCI is enabled for Tegra, then power-up the XUSB
852 * host and super-speed partitions. Once the XHCI driver
853 * manages the partitions itself this code can be removed. Note
854 * that we don't register these partitions with the genpd core
855 * to avoid it from powering down the partitions as they appear
856 * to be unused.
857 */
858 if (IS_ENABLED(CONFIG_USB_XHCI_TEGRA) &&
859 (id == TEGRA_POWERGATE_XUSBA || id == TEGRA_POWERGATE_XUSBC)) {
860 if (off)
861 WARN_ON(tegra_powergate_power_up(pg, true));
862
863 goto remove_resets;
864 }
865
866 err = pm_genpd_init(&pg->genpd, NULL, off);
867 if (err < 0) {
868 pr_err("failed to initialise PM domain %s: %d\n", np->name,
869 err);
870 goto remove_resets;
871 }
872
873 err = of_genpd_add_provider_simple(np, &pg->genpd);
874 if (err < 0) {
875 pr_err("failed to add PM domain provider for %s: %d\n",
876 np->name, err);
877 goto remove_genpd;
878 }
879
880 pr_debug("added PM domain %s\n", pg->genpd.name);
881
882 return;
883
884 remove_genpd:
885 pm_genpd_remove(&pg->genpd);
886
887 remove_resets:
888 while (pg->num_resets--)
889 reset_control_put(pg->resets[pg->num_resets]);
890
891 kfree(pg->resets);
892
893 remove_clks:
894 while (pg->num_clks--)
895 clk_put(pg->clks[pg->num_clks]);
896
897 kfree(pg->clks);
898
899 set_available:
900 set_bit(id, pmc->powergates_available);
901
902 free_mem:
903 kfree(pg);
904 }
905
906 static void tegra_powergate_init(struct tegra_pmc *pmc,
907 struct device_node *parent)
908 {
909 struct device_node *np, *child;
910 unsigned int i;
911
912 /* Create a bitmap of the available and valid partitions */
913 for (i = 0; i < pmc->soc->num_powergates; i++)
914 if (pmc->soc->powergates[i])
915 set_bit(i, pmc->powergates_available);
916
917 np = of_get_child_by_name(parent, "powergates");
918 if (!np)
919 return;
920
921 for_each_child_of_node(np, child) {
922 tegra_powergate_add(pmc, child);
923 of_node_put(child);
924 }
925
926 of_node_put(np);
927 }
928
929 static const struct tegra_io_pad_soc *
930 tegra_io_pad_find(struct tegra_pmc *pmc, enum tegra_io_pad id)
931 {
932 unsigned int i;
933
934 for (i = 0; i < pmc->soc->num_io_pads; i++)
935 if (pmc->soc->io_pads[i].id == id)
936 return &pmc->soc->io_pads[i];
937
938 return NULL;
939 }
940
941 static int tegra_io_pad_prepare(enum tegra_io_pad id, unsigned long *request,
942 unsigned long *status, u32 *mask)
943 {
944 const struct tegra_io_pad_soc *pad;
945 unsigned long rate, value;
946
947 pad = tegra_io_pad_find(pmc, id);
948 if (!pad) {
949 pr_err("invalid I/O pad ID %u\n", id);
950 return -ENOENT;
951 }
952
953 if (pad->dpd == UINT_MAX)
954 return -ENOTSUPP;
955
956 *mask = BIT(pad->dpd % 32);
957
958 if (pad->dpd < 32) {
959 *status = IO_DPD_STATUS;
960 *request = IO_DPD_REQ;
961 } else {
962 *status = IO_DPD2_STATUS;
963 *request = IO_DPD2_REQ;
964 }
965
966 rate = clk_get_rate(pmc->clk);
967 if (!rate) {
968 pr_err("failed to get clock rate\n");
969 return -ENODEV;
970 }
971
972 tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
973
974 /* must be at least 200 ns, in APB (PCLK) clock cycles */
975 value = DIV_ROUND_UP(1000000000, rate);
976 value = DIV_ROUND_UP(200, value);
977 tegra_pmc_writel(value, SEL_DPD_TIM);
978
979 return 0;
980 }
981
982 static int tegra_io_pad_poll(unsigned long offset, u32 mask,
983 u32 val, unsigned long timeout)
984 {
985 u32 value;
986
987 timeout = jiffies + msecs_to_jiffies(timeout);
988
989 while (time_after(timeout, jiffies)) {
990 value = tegra_pmc_readl(offset);
991 if ((value & mask) == val)
992 return 0;
993
994 usleep_range(250, 1000);
995 }
996
997 return -ETIMEDOUT;
998 }
999
1000 static void tegra_io_pad_unprepare(void)
1001 {
1002 tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
1003 }
1004
1005 /**
1006 * tegra_io_pad_power_enable() - enable power to I/O pad
1007 * @id: Tegra I/O pad ID for which to enable power
1008 *
1009 * Returns: 0 on success or a negative error code on failure.
1010 */
1011 int tegra_io_pad_power_enable(enum tegra_io_pad id)
1012 {
1013 unsigned long request, status;
1014 u32 mask;
1015 int err;
1016
1017 mutex_lock(&pmc->powergates_lock);
1018
1019 err = tegra_io_pad_prepare(id, &request, &status, &mask);
1020 if (err < 0) {
1021 pr_err("failed to prepare I/O pad: %d\n", err);
1022 goto unlock;
1023 }
1024
1025 tegra_pmc_writel(IO_DPD_REQ_CODE_OFF | mask, request);
1026
1027 err = tegra_io_pad_poll(status, mask, 0, 250);
1028 if (err < 0) {
1029 pr_err("failed to enable I/O pad: %d\n", err);
1030 goto unlock;
1031 }
1032
1033 tegra_io_pad_unprepare();
1034
1035 unlock:
1036 mutex_unlock(&pmc->powergates_lock);
1037 return err;
1038 }
1039 EXPORT_SYMBOL(tegra_io_pad_power_enable);
1040
1041 /**
1042 * tegra_io_pad_power_disable() - disable power to I/O pad
1043 * @id: Tegra I/O pad ID for which to disable power
1044 *
1045 * Returns: 0 on success or a negative error code on failure.
1046 */
1047 int tegra_io_pad_power_disable(enum tegra_io_pad id)
1048 {
1049 unsigned long request, status;
1050 u32 mask;
1051 int err;
1052
1053 mutex_lock(&pmc->powergates_lock);
1054
1055 err = tegra_io_pad_prepare(id, &request, &status, &mask);
1056 if (err < 0) {
1057 pr_err("failed to prepare I/O pad: %d\n", err);
1058 goto unlock;
1059 }
1060
1061 tegra_pmc_writel(IO_DPD_REQ_CODE_ON | mask, request);
1062
1063 err = tegra_io_pad_poll(status, mask, mask, 250);
1064 if (err < 0) {
1065 pr_err("failed to disable I/O pad: %d\n", err);
1066 goto unlock;
1067 }
1068
1069 tegra_io_pad_unprepare();
1070
1071 unlock:
1072 mutex_unlock(&pmc->powergates_lock);
1073 return err;
1074 }
1075 EXPORT_SYMBOL(tegra_io_pad_power_disable);
1076
1077 int tegra_io_pad_set_voltage(enum tegra_io_pad id,
1078 enum tegra_io_pad_voltage voltage)
1079 {
1080 const struct tegra_io_pad_soc *pad;
1081 u32 value;
1082
1083 pad = tegra_io_pad_find(pmc, id);
1084 if (!pad)
1085 return -ENOENT;
1086
1087 if (pad->voltage == UINT_MAX)
1088 return -ENOTSUPP;
1089
1090 mutex_lock(&pmc->powergates_lock);
1091
1092 /* write-enable PMC_PWR_DET_VALUE[pad->voltage] */
1093 value = tegra_pmc_readl(PMC_PWR_DET);
1094 value |= BIT(pad->voltage);
1095 tegra_pmc_writel(value, PMC_PWR_DET);
1096
1097 /* update I/O voltage */
1098 value = tegra_pmc_readl(PMC_PWR_DET_VALUE);
1099
1100 if (voltage == TEGRA_IO_PAD_1800000UV)
1101 value &= ~BIT(pad->voltage);
1102 else
1103 value |= BIT(pad->voltage);
1104
1105 tegra_pmc_writel(value, PMC_PWR_DET_VALUE);
1106
1107 mutex_unlock(&pmc->powergates_lock);
1108
1109 usleep_range(100, 250);
1110
1111 return 0;
1112 }
1113 EXPORT_SYMBOL(tegra_io_pad_set_voltage);
1114
1115 int tegra_io_pad_get_voltage(enum tegra_io_pad id)
1116 {
1117 const struct tegra_io_pad_soc *pad;
1118 u32 value;
1119
1120 pad = tegra_io_pad_find(pmc, id);
1121 if (!pad)
1122 return -ENOENT;
1123
1124 if (pad->voltage == UINT_MAX)
1125 return -ENOTSUPP;
1126
1127 value = tegra_pmc_readl(PMC_PWR_DET_VALUE);
1128
1129 if ((value & BIT(pad->voltage)) == 0)
1130 return TEGRA_IO_PAD_1800000UV;
1131
1132 return TEGRA_IO_PAD_3300000UV;
1133 }
1134 EXPORT_SYMBOL(tegra_io_pad_get_voltage);
1135
1136 /**
1137 * tegra_io_rail_power_on() - enable power to I/O rail
1138 * @id: Tegra I/O pad ID for which to enable power
1139 *
1140 * See also: tegra_io_pad_power_enable()
1141 */
1142 int tegra_io_rail_power_on(unsigned int id)
1143 {
1144 return tegra_io_pad_power_enable(id);
1145 }
1146 EXPORT_SYMBOL(tegra_io_rail_power_on);
1147
1148 /**
1149 * tegra_io_rail_power_off() - disable power to I/O rail
1150 * @id: Tegra I/O pad ID for which to disable power
1151 *
1152 * See also: tegra_io_pad_power_disable()
1153 */
1154 int tegra_io_rail_power_off(unsigned int id)
1155 {
1156 return tegra_io_pad_power_disable(id);
1157 }
1158 EXPORT_SYMBOL(tegra_io_rail_power_off);
1159
1160 #ifdef CONFIG_PM_SLEEP
1161 enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
1162 {
1163 return pmc->suspend_mode;
1164 }
1165
1166 void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
1167 {
1168 if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
1169 return;
1170
1171 pmc->suspend_mode = mode;
1172 }
1173
1174 void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode)
1175 {
1176 unsigned long long rate = 0;
1177 u32 value;
1178
1179 switch (mode) {
1180 case TEGRA_SUSPEND_LP1:
1181 rate = 32768;
1182 break;
1183
1184 case TEGRA_SUSPEND_LP2:
1185 rate = clk_get_rate(pmc->clk);
1186 break;
1187
1188 default:
1189 break;
1190 }
1191
1192 if (WARN_ON_ONCE(rate == 0))
1193 rate = 100000000;
1194
1195 if (rate != pmc->rate) {
1196 u64 ticks;
1197
1198 ticks = pmc->cpu_good_time * rate + USEC_PER_SEC - 1;
1199 do_div(ticks, USEC_PER_SEC);
1200 tegra_pmc_writel(ticks, PMC_CPUPWRGOOD_TIMER);
1201
1202 ticks = pmc->cpu_off_time * rate + USEC_PER_SEC - 1;
1203 do_div(ticks, USEC_PER_SEC);
1204 tegra_pmc_writel(ticks, PMC_CPUPWROFF_TIMER);
1205
1206 wmb();
1207
1208 pmc->rate = rate;
1209 }
1210
1211 value = tegra_pmc_readl(PMC_CNTRL);
1212 value &= ~PMC_CNTRL_SIDE_EFFECT_LP0;
1213 value |= PMC_CNTRL_CPU_PWRREQ_OE;
1214 tegra_pmc_writel(value, PMC_CNTRL);
1215 }
1216 #endif
1217
1218 static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
1219 {
1220 u32 value, values[2];
1221
1222 if (of_property_read_u32(np, "nvidia,suspend-mode", &value)) {
1223 } else {
1224 switch (value) {
1225 case 0:
1226 pmc->suspend_mode = TEGRA_SUSPEND_LP0;
1227 break;
1228
1229 case 1:
1230 pmc->suspend_mode = TEGRA_SUSPEND_LP1;
1231 break;
1232
1233 case 2:
1234 pmc->suspend_mode = TEGRA_SUSPEND_LP2;
1235 break;
1236
1237 default:
1238 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1239 break;
1240 }
1241 }
1242
1243 pmc->suspend_mode = tegra_pm_validate_suspend_mode(pmc->suspend_mode);
1244
1245 if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &value))
1246 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1247
1248 pmc->cpu_good_time = value;
1249
1250 if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &value))
1251 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1252
1253 pmc->cpu_off_time = value;
1254
1255 if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
1256 values, ARRAY_SIZE(values)))
1257 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1258
1259 pmc->core_osc_time = values[0];
1260 pmc->core_pmu_time = values[1];
1261
1262 if (of_property_read_u32(np, "nvidia,core-pwr-off-time", &value))
1263 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1264
1265 pmc->core_off_time = value;
1266
1267 pmc->corereq_high = of_property_read_bool(np,
1268 "nvidia,core-power-req-active-high");
1269
1270 pmc->sysclkreq_high = of_property_read_bool(np,
1271 "nvidia,sys-clock-req-active-high");
1272
1273 pmc->combined_req = of_property_read_bool(np,
1274 "nvidia,combined-power-req");
1275
1276 pmc->cpu_pwr_good_en = of_property_read_bool(np,
1277 "nvidia,cpu-pwr-good-en");
1278
1279 if (of_property_read_u32_array(np, "nvidia,lp0-vec", values,
1280 ARRAY_SIZE(values)))
1281 if (pmc->suspend_mode == TEGRA_SUSPEND_LP0)
1282 pmc->suspend_mode = TEGRA_SUSPEND_LP1;
1283
1284 pmc->lp0_vec_phys = values[0];
1285 pmc->lp0_vec_size = values[1];
1286
1287 return 0;
1288 }
1289
1290 static void tegra_pmc_init(struct tegra_pmc *pmc)
1291 {
1292 u32 value;
1293
1294 /* Always enable CPU power request */
1295 value = tegra_pmc_readl(PMC_CNTRL);
1296 value |= PMC_CNTRL_CPU_PWRREQ_OE;
1297 tegra_pmc_writel(value, PMC_CNTRL);
1298
1299 value = tegra_pmc_readl(PMC_CNTRL);
1300
1301 if (pmc->sysclkreq_high)
1302 value &= ~PMC_CNTRL_SYSCLK_POLARITY;
1303 else
1304 value |= PMC_CNTRL_SYSCLK_POLARITY;
1305
1306 /* configure the output polarity while the request is tristated */
1307 tegra_pmc_writel(value, PMC_CNTRL);
1308
1309 /* now enable the request */
1310 value = tegra_pmc_readl(PMC_CNTRL);
1311 value |= PMC_CNTRL_SYSCLK_OE;
1312 tegra_pmc_writel(value, PMC_CNTRL);
1313 }
1314
1315 static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
1316 {
1317 static const char disabled[] = "emergency thermal reset disabled";
1318 u32 pmu_addr, ctrl_id, reg_addr, reg_data, pinmux;
1319 struct device *dev = pmc->dev;
1320 struct device_node *np;
1321 u32 value, checksum;
1322
1323 if (!pmc->soc->has_tsense_reset)
1324 return;
1325
1326 np = of_find_node_by_name(pmc->dev->of_node, "i2c-thermtrip");
1327 if (!np) {
1328 dev_warn(dev, "i2c-thermtrip node not found, %s.\n", disabled);
1329 return;
1330 }
1331
1332 if (of_property_read_u32(np, "nvidia,i2c-controller-id", &ctrl_id)) {
1333 dev_err(dev, "I2C controller ID missing, %s.\n", disabled);
1334 goto out;
1335 }
1336
1337 if (of_property_read_u32(np, "nvidia,bus-addr", &pmu_addr)) {
1338 dev_err(dev, "nvidia,bus-addr missing, %s.\n", disabled);
1339 goto out;
1340 }
1341
1342 if (of_property_read_u32(np, "nvidia,reg-addr", &reg_addr)) {
1343 dev_err(dev, "nvidia,reg-addr missing, %s.\n", disabled);
1344 goto out;
1345 }
1346
1347 if (of_property_read_u32(np, "nvidia,reg-data", &reg_data)) {
1348 dev_err(dev, "nvidia,reg-data missing, %s.\n", disabled);
1349 goto out;
1350 }
1351
1352 if (of_property_read_u32(np, "nvidia,pinmux-id", &pinmux))
1353 pinmux = 0;
1354
1355 value = tegra_pmc_readl(PMC_SENSOR_CTRL);
1356 value |= PMC_SENSOR_CTRL_SCRATCH_WRITE;
1357 tegra_pmc_writel(value, PMC_SENSOR_CTRL);
1358
1359 value = (reg_data << PMC_SCRATCH54_DATA_SHIFT) |
1360 (reg_addr << PMC_SCRATCH54_ADDR_SHIFT);
1361 tegra_pmc_writel(value, PMC_SCRATCH54);
1362
1363 value = PMC_SCRATCH55_RESET_TEGRA;
1364 value |= ctrl_id << PMC_SCRATCH55_CNTRL_ID_SHIFT;
1365 value |= pinmux << PMC_SCRATCH55_PINMUX_SHIFT;
1366 value |= pmu_addr << PMC_SCRATCH55_I2CSLV1_SHIFT;
1367
1368 /*
1369 * Calculate checksum of SCRATCH54, SCRATCH55 fields. Bits 23:16 will
1370 * contain the checksum and are currently zero, so they are not added.
1371 */
1372 checksum = reg_addr + reg_data + (value & 0xff) + ((value >> 8) & 0xff)
1373 + ((value >> 24) & 0xff);
1374 checksum &= 0xff;
1375 checksum = 0x100 - checksum;
1376
1377 value |= checksum << PMC_SCRATCH55_CHECKSUM_SHIFT;
1378
1379 tegra_pmc_writel(value, PMC_SCRATCH55);
1380
1381 value = tegra_pmc_readl(PMC_SENSOR_CTRL);
1382 value |= PMC_SENSOR_CTRL_ENABLE_RST;
1383 tegra_pmc_writel(value, PMC_SENSOR_CTRL);
1384
1385 dev_info(pmc->dev, "emergency thermal reset enabled\n");
1386
1387 out:
1388 of_node_put(np);
1389 }
1390
1391 static int tegra_pmc_probe(struct platform_device *pdev)
1392 {
1393 void __iomem *base;
1394 struct resource *res;
1395 int err;
1396
1397 /*
1398 * Early initialisation should have configured an initial
1399 * register mapping and setup the soc data pointer. If these
1400 * are not valid then something went badly wrong!
1401 */
1402 if (WARN_ON(!pmc->base || !pmc->soc))
1403 return -ENODEV;
1404
1405 err = tegra_pmc_parse_dt(pmc, pdev->dev.of_node);
1406 if (err < 0)
1407 return err;
1408
1409 /* take over the memory region from the early initialization */
1410 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1411 base = devm_ioremap_resource(&pdev->dev, res);
1412 if (IS_ERR(base))
1413 return PTR_ERR(base);
1414
1415 pmc->clk = devm_clk_get(&pdev->dev, "pclk");
1416 if (IS_ERR(pmc->clk)) {
1417 err = PTR_ERR(pmc->clk);
1418 dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
1419 return err;
1420 }
1421
1422 pmc->dev = &pdev->dev;
1423
1424 tegra_pmc_init(pmc);
1425
1426 tegra_pmc_init_tsense_reset(pmc);
1427
1428 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1429 err = tegra_powergate_debugfs_init();
1430 if (err < 0)
1431 return err;
1432 }
1433
1434 err = register_restart_handler(&tegra_pmc_restart_handler);
1435 if (err) {
1436 debugfs_remove(pmc->debugfs);
1437 dev_err(&pdev->dev, "unable to register restart handler, %d\n",
1438 err);
1439 return err;
1440 }
1441
1442 mutex_lock(&pmc->powergates_lock);
1443 iounmap(pmc->base);
1444 pmc->base = base;
1445 mutex_unlock(&pmc->powergates_lock);
1446
1447 return 0;
1448 }
1449
1450 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
1451 static int tegra_pmc_suspend(struct device *dev)
1452 {
1453 tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
1454
1455 return 0;
1456 }
1457
1458 static int tegra_pmc_resume(struct device *dev)
1459 {
1460 tegra_pmc_writel(0x0, PMC_SCRATCH41);
1461
1462 return 0;
1463 }
1464
1465 static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);
1466
1467 #endif
1468
1469 static const char * const tegra20_powergates[] = {
1470 [TEGRA_POWERGATE_CPU] = "cpu",
1471 [TEGRA_POWERGATE_3D] = "3d",
1472 [TEGRA_POWERGATE_VENC] = "venc",
1473 [TEGRA_POWERGATE_VDEC] = "vdec",
1474 [TEGRA_POWERGATE_PCIE] = "pcie",
1475 [TEGRA_POWERGATE_L2] = "l2",
1476 [TEGRA_POWERGATE_MPE] = "mpe",
1477 };
1478
1479 static const struct tegra_pmc_soc tegra20_pmc_soc = {
1480 .num_powergates = ARRAY_SIZE(tegra20_powergates),
1481 .powergates = tegra20_powergates,
1482 .num_cpu_powergates = 0,
1483 .cpu_powergates = NULL,
1484 .has_tsense_reset = false,
1485 .has_gpu_clamps = false,
1486 };
1487
1488 static const char * const tegra30_powergates[] = {
1489 [TEGRA_POWERGATE_CPU] = "cpu0",
1490 [TEGRA_POWERGATE_3D] = "3d0",
1491 [TEGRA_POWERGATE_VENC] = "venc",
1492 [TEGRA_POWERGATE_VDEC] = "vdec",
1493 [TEGRA_POWERGATE_PCIE] = "pcie",
1494 [TEGRA_POWERGATE_L2] = "l2",
1495 [TEGRA_POWERGATE_MPE] = "mpe",
1496 [TEGRA_POWERGATE_HEG] = "heg",
1497 [TEGRA_POWERGATE_SATA] = "sata",
1498 [TEGRA_POWERGATE_CPU1] = "cpu1",
1499 [TEGRA_POWERGATE_CPU2] = "cpu2",
1500 [TEGRA_POWERGATE_CPU3] = "cpu3",
1501 [TEGRA_POWERGATE_CELP] = "celp",
1502 [TEGRA_POWERGATE_3D1] = "3d1",
1503 };
1504
1505 static const u8 tegra30_cpu_powergates[] = {
1506 TEGRA_POWERGATE_CPU,
1507 TEGRA_POWERGATE_CPU1,
1508 TEGRA_POWERGATE_CPU2,
1509 TEGRA_POWERGATE_CPU3,
1510 };
1511
1512 static const struct tegra_pmc_soc tegra30_pmc_soc = {
1513 .num_powergates = ARRAY_SIZE(tegra30_powergates),
1514 .powergates = tegra30_powergates,
1515 .num_cpu_powergates = ARRAY_SIZE(tegra30_cpu_powergates),
1516 .cpu_powergates = tegra30_cpu_powergates,
1517 .has_tsense_reset = true,
1518 .has_gpu_clamps = false,
1519 };
1520
1521 static const char * const tegra114_powergates[] = {
1522 [TEGRA_POWERGATE_CPU] = "crail",
1523 [TEGRA_POWERGATE_3D] = "3d",
1524 [TEGRA_POWERGATE_VENC] = "venc",
1525 [TEGRA_POWERGATE_VDEC] = "vdec",
1526 [TEGRA_POWERGATE_MPE] = "mpe",
1527 [TEGRA_POWERGATE_HEG] = "heg",
1528 [TEGRA_POWERGATE_CPU1] = "cpu1",
1529 [TEGRA_POWERGATE_CPU2] = "cpu2",
1530 [TEGRA_POWERGATE_CPU3] = "cpu3",
1531 [TEGRA_POWERGATE_CELP] = "celp",
1532 [TEGRA_POWERGATE_CPU0] = "cpu0",
1533 [TEGRA_POWERGATE_C0NC] = "c0nc",
1534 [TEGRA_POWERGATE_C1NC] = "c1nc",
1535 [TEGRA_POWERGATE_DIS] = "dis",
1536 [TEGRA_POWERGATE_DISB] = "disb",
1537 [TEGRA_POWERGATE_XUSBA] = "xusba",
1538 [TEGRA_POWERGATE_XUSBB] = "xusbb",
1539 [TEGRA_POWERGATE_XUSBC] = "xusbc",
1540 };
1541
1542 static const u8 tegra114_cpu_powergates[] = {
1543 TEGRA_POWERGATE_CPU0,
1544 TEGRA_POWERGATE_CPU1,
1545 TEGRA_POWERGATE_CPU2,
1546 TEGRA_POWERGATE_CPU3,
1547 };
1548
1549 static const struct tegra_pmc_soc tegra114_pmc_soc = {
1550 .num_powergates = ARRAY_SIZE(tegra114_powergates),
1551 .powergates = tegra114_powergates,
1552 .num_cpu_powergates = ARRAY_SIZE(tegra114_cpu_powergates),
1553 .cpu_powergates = tegra114_cpu_powergates,
1554 .has_tsense_reset = true,
1555 .has_gpu_clamps = false,
1556 };
1557
1558 static const char * const tegra124_powergates[] = {
1559 [TEGRA_POWERGATE_CPU] = "crail",
1560 [TEGRA_POWERGATE_3D] = "3d",
1561 [TEGRA_POWERGATE_VENC] = "venc",
1562 [TEGRA_POWERGATE_PCIE] = "pcie",
1563 [TEGRA_POWERGATE_VDEC] = "vdec",
1564 [TEGRA_POWERGATE_MPE] = "mpe",
1565 [TEGRA_POWERGATE_HEG] = "heg",
1566 [TEGRA_POWERGATE_SATA] = "sata",
1567 [TEGRA_POWERGATE_CPU1] = "cpu1",
1568 [TEGRA_POWERGATE_CPU2] = "cpu2",
1569 [TEGRA_POWERGATE_CPU3] = "cpu3",
1570 [TEGRA_POWERGATE_CELP] = "celp",
1571 [TEGRA_POWERGATE_CPU0] = "cpu0",
1572 [TEGRA_POWERGATE_C0NC] = "c0nc",
1573 [TEGRA_POWERGATE_C1NC] = "c1nc",
1574 [TEGRA_POWERGATE_SOR] = "sor",
1575 [TEGRA_POWERGATE_DIS] = "dis",
1576 [TEGRA_POWERGATE_DISB] = "disb",
1577 [TEGRA_POWERGATE_XUSBA] = "xusba",
1578 [TEGRA_POWERGATE_XUSBB] = "xusbb",
1579 [TEGRA_POWERGATE_XUSBC] = "xusbc",
1580 [TEGRA_POWERGATE_VIC] = "vic",
1581 [TEGRA_POWERGATE_IRAM] = "iram",
1582 };
1583
1584 static const u8 tegra124_cpu_powergates[] = {
1585 TEGRA_POWERGATE_CPU0,
1586 TEGRA_POWERGATE_CPU1,
1587 TEGRA_POWERGATE_CPU2,
1588 TEGRA_POWERGATE_CPU3,
1589 };
1590
1591 static const struct tegra_io_pad_soc tegra124_io_pads[] = {
1592 { .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = UINT_MAX },
1593 { .id = TEGRA_IO_PAD_BB, .dpd = 15, .voltage = UINT_MAX },
1594 { .id = TEGRA_IO_PAD_CAM, .dpd = 36, .voltage = UINT_MAX },
1595 { .id = TEGRA_IO_PAD_COMP, .dpd = 22, .voltage = UINT_MAX },
1596 { .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
1597 { .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
1598 { .id = TEGRA_IO_PAD_CSIE, .dpd = 44, .voltage = UINT_MAX },
1599 { .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
1600 { .id = TEGRA_IO_PAD_DSIB, .dpd = 39, .voltage = UINT_MAX },
1601 { .id = TEGRA_IO_PAD_DSIC, .dpd = 40, .voltage = UINT_MAX },
1602 { .id = TEGRA_IO_PAD_DSID, .dpd = 41, .voltage = UINT_MAX },
1603 { .id = TEGRA_IO_PAD_HDMI, .dpd = 28, .voltage = UINT_MAX },
1604 { .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
1605 { .id = TEGRA_IO_PAD_HV, .dpd = 38, .voltage = UINT_MAX },
1606 { .id = TEGRA_IO_PAD_LVDS, .dpd = 57, .voltage = UINT_MAX },
1607 { .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
1608 { .id = TEGRA_IO_PAD_NAND, .dpd = 13, .voltage = UINT_MAX },
1609 { .id = TEGRA_IO_PAD_PEX_BIAS, .dpd = 4, .voltage = UINT_MAX },
1610 { .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 5, .voltage = UINT_MAX },
1611 { .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
1612 { .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = 32, .voltage = UINT_MAX },
1613 { .id = TEGRA_IO_PAD_SDMMC1, .dpd = 33, .voltage = UINT_MAX },
1614 { .id = TEGRA_IO_PAD_SDMMC3, .dpd = 34, .voltage = UINT_MAX },
1615 { .id = TEGRA_IO_PAD_SDMMC4, .dpd = 35, .voltage = UINT_MAX },
1616 { .id = TEGRA_IO_PAD_SYS_DDC, .dpd = 58, .voltage = UINT_MAX },
1617 { .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = UINT_MAX },
1618 { .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
1619 { .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
1620 { .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
1621 { .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
1622 };
1623
1624 static const struct tegra_pmc_soc tegra124_pmc_soc = {
1625 .num_powergates = ARRAY_SIZE(tegra124_powergates),
1626 .powergates = tegra124_powergates,
1627 .num_cpu_powergates = ARRAY_SIZE(tegra124_cpu_powergates),
1628 .cpu_powergates = tegra124_cpu_powergates,
1629 .has_tsense_reset = true,
1630 .has_gpu_clamps = true,
1631 .num_io_pads = ARRAY_SIZE(tegra124_io_pads),
1632 .io_pads = tegra124_io_pads,
1633 };
1634
1635 static const char * const tegra210_powergates[] = {
1636 [TEGRA_POWERGATE_CPU] = "crail",
1637 [TEGRA_POWERGATE_3D] = "3d",
1638 [TEGRA_POWERGATE_VENC] = "venc",
1639 [TEGRA_POWERGATE_PCIE] = "pcie",
1640 [TEGRA_POWERGATE_MPE] = "mpe",
1641 [TEGRA_POWERGATE_SATA] = "sata",
1642 [TEGRA_POWERGATE_CPU1] = "cpu1",
1643 [TEGRA_POWERGATE_CPU2] = "cpu2",
1644 [TEGRA_POWERGATE_CPU3] = "cpu3",
1645 [TEGRA_POWERGATE_CPU0] = "cpu0",
1646 [TEGRA_POWERGATE_C0NC] = "c0nc",
1647 [TEGRA_POWERGATE_SOR] = "sor",
1648 [TEGRA_POWERGATE_DIS] = "dis",
1649 [TEGRA_POWERGATE_DISB] = "disb",
1650 [TEGRA_POWERGATE_XUSBA] = "xusba",
1651 [TEGRA_POWERGATE_XUSBB] = "xusbb",
1652 [TEGRA_POWERGATE_XUSBC] = "xusbc",
1653 [TEGRA_POWERGATE_VIC] = "vic",
1654 [TEGRA_POWERGATE_IRAM] = "iram",
1655 [TEGRA_POWERGATE_NVDEC] = "nvdec",
1656 [TEGRA_POWERGATE_NVJPG] = "nvjpg",
1657 [TEGRA_POWERGATE_AUD] = "aud",
1658 [TEGRA_POWERGATE_DFD] = "dfd",
1659 [TEGRA_POWERGATE_VE2] = "ve2",
1660 };
1661
1662 static const u8 tegra210_cpu_powergates[] = {
1663 TEGRA_POWERGATE_CPU0,
1664 TEGRA_POWERGATE_CPU1,
1665 TEGRA_POWERGATE_CPU2,
1666 TEGRA_POWERGATE_CPU3,
1667 };
1668
1669 static const struct tegra_io_pad_soc tegra210_io_pads[] = {
1670 { .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = 5 },
1671 { .id = TEGRA_IO_PAD_AUDIO_HV, .dpd = 61, .voltage = 18 },
1672 { .id = TEGRA_IO_PAD_CAM, .dpd = 36, .voltage = 10 },
1673 { .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
1674 { .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
1675 { .id = TEGRA_IO_PAD_CSIC, .dpd = 42, .voltage = UINT_MAX },
1676 { .id = TEGRA_IO_PAD_CSID, .dpd = 43, .voltage = UINT_MAX },
1677 { .id = TEGRA_IO_PAD_CSIE, .dpd = 44, .voltage = UINT_MAX },
1678 { .id = TEGRA_IO_PAD_CSIF, .dpd = 45, .voltage = UINT_MAX },
1679 { .id = TEGRA_IO_PAD_DBG, .dpd = 25, .voltage = 19 },
1680 { .id = TEGRA_IO_PAD_DEBUG_NONAO, .dpd = 26, .voltage = UINT_MAX },
1681 { .id = TEGRA_IO_PAD_DMIC, .dpd = 50, .voltage = 20 },
1682 { .id = TEGRA_IO_PAD_DP, .dpd = 51, .voltage = UINT_MAX },
1683 { .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
1684 { .id = TEGRA_IO_PAD_DSIB, .dpd = 39, .voltage = UINT_MAX },
1685 { .id = TEGRA_IO_PAD_DSIC, .dpd = 40, .voltage = UINT_MAX },
1686 { .id = TEGRA_IO_PAD_DSID, .dpd = 41, .voltage = UINT_MAX },
1687 { .id = TEGRA_IO_PAD_EMMC, .dpd = 35, .voltage = UINT_MAX },
1688 { .id = TEGRA_IO_PAD_EMMC2, .dpd = 37, .voltage = UINT_MAX },
1689 { .id = TEGRA_IO_PAD_GPIO, .dpd = 27, .voltage = 21 },
1690 { .id = TEGRA_IO_PAD_HDMI, .dpd = 28, .voltage = UINT_MAX },
1691 { .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
1692 { .id = TEGRA_IO_PAD_LVDS, .dpd = 57, .voltage = UINT_MAX },
1693 { .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
1694 { .id = TEGRA_IO_PAD_PEX_BIAS, .dpd = 4, .voltage = UINT_MAX },
1695 { .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 5, .voltage = UINT_MAX },
1696 { .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
1697 { .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = UINT_MAX, .voltage = 11 },
1698 { .id = TEGRA_IO_PAD_SDMMC1, .dpd = 33, .voltage = 12 },
1699 { .id = TEGRA_IO_PAD_SDMMC3, .dpd = 34, .voltage = 13 },
1700 { .id = TEGRA_IO_PAD_SPI, .dpd = 46, .voltage = 22 },
1701 { .id = TEGRA_IO_PAD_SPI_HV, .dpd = 47, .voltage = 23 },
1702 { .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = 2 },
1703 { .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
1704 { .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
1705 { .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
1706 { .id = TEGRA_IO_PAD_USB3, .dpd = 18, .voltage = UINT_MAX },
1707 { .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
1708 };
1709
1710 static const struct tegra_pmc_soc tegra210_pmc_soc = {
1711 .num_powergates = ARRAY_SIZE(tegra210_powergates),
1712 .powergates = tegra210_powergates,
1713 .num_cpu_powergates = ARRAY_SIZE(tegra210_cpu_powergates),
1714 .cpu_powergates = tegra210_cpu_powergates,
1715 .has_tsense_reset = true,
1716 .has_gpu_clamps = true,
1717 .num_io_pads = ARRAY_SIZE(tegra210_io_pads),
1718 .io_pads = tegra210_io_pads,
1719 };
1720
1721 static const struct of_device_id tegra_pmc_match[] = {
1722 { .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc },
1723 { .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc },
1724 { .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
1725 { .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc },
1726 { .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc },
1727 { .compatible = "nvidia,tegra20-pmc", .data = &tegra20_pmc_soc },
1728 { }
1729 };
1730
1731 static struct platform_driver tegra_pmc_driver = {
1732 .driver = {
1733 .name = "tegra-pmc",
1734 .suppress_bind_attrs = true,
1735 .of_match_table = tegra_pmc_match,
1736 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
1737 .pm = &tegra_pmc_pm_ops,
1738 #endif
1739 },
1740 .probe = tegra_pmc_probe,
1741 };
1742 builtin_platform_driver(tegra_pmc_driver);
1743
1744 /*
1745 * Early initialization to allow access to registers in the very early boot
1746 * process.
1747 */
1748 static int __init tegra_pmc_early_init(void)
1749 {
1750 const struct of_device_id *match;
1751 struct device_node *np;
1752 struct resource regs;
1753 bool invert;
1754 u32 value;
1755
1756 mutex_init(&pmc->powergates_lock);
1757
1758 np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match);
1759 if (!np) {
1760 /*
1761 * Fall back to legacy initialization for 32-bit ARM only. All
1762 * 64-bit ARM device tree files for Tegra are required to have
1763 * a PMC node.
1764 *
1765 * This is for backwards-compatibility with old device trees
1766 * that didn't contain a PMC node. Note that in this case the
1767 * SoC data can't be matched and therefore powergating is
1768 * disabled.
1769 */
1770 if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
1771 pr_warn("DT node not found, powergating disabled\n");
1772
1773 regs.start = 0x7000e400;
1774 regs.end = 0x7000e7ff;
1775 regs.flags = IORESOURCE_MEM;
1776
1777 pr_warn("Using memory region %pR\n", &regs);
1778 } else {
1779 /*
1780 * At this point we're not running on Tegra, so play
1781 * nice with multi-platform kernels.
1782 */
1783 return 0;
1784 }
1785 } else {
1786 /*
1787 * Extract information from the device tree if we've found a
1788 * matching node.
1789 */
1790 if (of_address_to_resource(np, 0, &regs) < 0) {
1791 pr_err("failed to get PMC registers\n");
1792 of_node_put(np);
1793 return -ENXIO;
1794 }
1795 }
1796
1797 pmc->base = ioremap_nocache(regs.start, resource_size(&regs));
1798 if (!pmc->base) {
1799 pr_err("failed to map PMC registers\n");
1800 of_node_put(np);
1801 return -ENXIO;
1802 }
1803
1804 if (np) {
1805 pmc->soc = match->data;
1806
1807 tegra_powergate_init(pmc, np);
1808
1809 /*
1810 * Invert the interrupt polarity if a PMC device tree node
1811 * exists and contains the nvidia,invert-interrupt property.
1812 */
1813 invert = of_property_read_bool(np, "nvidia,invert-interrupt");
1814
1815 value = tegra_pmc_readl(PMC_CNTRL);
1816
1817 if (invert)
1818 value |= PMC_CNTRL_INTR_POLARITY;
1819 else
1820 value &= ~PMC_CNTRL_INTR_POLARITY;
1821
1822 tegra_pmc_writel(value, PMC_CNTRL);
1823
1824 of_node_put(np);
1825 }
1826
1827 return 0;
1828 }
1829 early_initcall(tegra_pmc_early_init);
Linux with added FPC-III support