summaryrefslogtreecommitdiffstats
path: root/drivers/firmware/xilinx/zynqmp.c
blob: 74d9f13d72c45f4c1c9052d044b70d0c341ba53a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
// SPDX-License-Identifier: GPL-2.0
/*
 * Xilinx Zynq MPSoC Firmware layer
 *
 *  Copyright (C) 2014-2018 Xilinx, Inc.
 *
 *  Michal Simek <michal.simek@xilinx.com>
 *  Davorin Mista <davorin.mista@aggios.com>
 *  Jolly Shah <jollys@xilinx.com>
 *  Rajan Vaja <rajanv@xilinx.com>
 */

#include <linux/arm-smccc.h>
#include <linux/compiler.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <linux/uaccess.h>

#include <linux/firmware/xlnx-zynqmp.h>
#include "zynqmp-debug.h"

static const struct zynqmp_eemi_ops *eemi_ops_tbl;

static const struct mfd_cell firmware_devs[] = {
	{
		.name = "zynqmp_power_controller",
	},
};

/**
 * zynqmp_pm_ret_code() - Convert PMU-FW error codes to Linux error codes
 * @ret_status:		PMUFW return code
 *
 * Return: corresponding Linux error code
 */
static int zynqmp_pm_ret_code(u32 ret_status)
{
	switch (ret_status) {
	case XST_PM_SUCCESS:
	case XST_PM_DOUBLE_REQ:
		return 0;
	case XST_PM_NO_ACCESS:
		return -EACCES;
	case XST_PM_ABORT_SUSPEND:
		return -ECANCELED;
	case XST_PM_MULT_USER:
		return -EUSERS;
	case XST_PM_INTERNAL:
	case XST_PM_CONFLICT:
	case XST_PM_INVALID_NODE:
	default:
		return -EINVAL;
	}
}

static noinline int do_fw_call_fail(u64 arg0, u64 arg1, u64 arg2,
				    u32 *ret_payload)
{
	return -ENODEV;
}

/*
 * PM function call wrapper
 * Invoke do_fw_call_smc or do_fw_call_hvc, depending on the configuration
 */
static int (*do_fw_call)(u64, u64, u64, u32 *ret_payload) = do_fw_call_fail;

/**
 * do_fw_call_smc() - Call system-level platform management layer (SMC)
 * @arg0:		Argument 0 to SMC call
 * @arg1:		Argument 1 to SMC call
 * @arg2:		Argument 2 to SMC call
 * @ret_payload:	Returned value array
 *
 * Invoke platform management function via SMC call (no hypervisor present).
 *
 * Return: Returns status, either success or error+reason
 */
static noinline int do_fw_call_smc(u64 arg0, u64 arg1, u64 arg2,
				   u32 *ret_payload)
{
	struct arm_smccc_res res;

	arm_smccc_smc(arg0, arg1, arg2, 0, 0, 0, 0, 0, &res);

	if (ret_payload) {
		ret_payload[0] = lower_32_bits(res.a0);
		ret_payload[1] = upper_32_bits(res.a0);
		ret_payload[2] = lower_32_bits(res.a1);
		ret_payload[3] = upper_32_bits(res.a1);
	}

	return zynqmp_pm_ret_code((enum pm_ret_status)res.a0);
}

/**
 * do_fw_call_hvc() - Call system-level platform management layer (HVC)
 * @arg0:		Argument 0 to HVC call
 * @arg1:		Argument 1 to HVC call
 * @arg2:		Argument 2 to HVC call
 * @ret_payload:	Returned value array
 *
 * Invoke platform management function via HVC
 * HVC-based for communication through hypervisor
 * (no direct communication with ATF).
 *
 * Return: Returns status, either success or error+reason
 */
static noinline int do_fw_call_hvc(u64 arg0, u64 arg1, u64 arg2,
				   u32 *ret_payload)
{
	struct arm_smccc_res res;

	arm_smccc_hvc(arg0, arg1, arg2, 0, 0, 0, 0, 0, &res);

	if (ret_payload) {
		ret_payload[0] = lower_32_bits(res.a0);
		ret_payload[1] = upper_32_bits(res.a0);
		ret_payload[2] = lower_32_bits(res.a1);
		ret_payload[3] = upper_32_bits(res.a1);
	}

	return zynqmp_pm_ret_code((enum pm_ret_status)res.a0);
}

/**
 * zynqmp_pm_invoke_fn() - Invoke the system-level platform management layer
 *			   caller function depending on the configuration
 * @pm_api_id:		Requested PM-API call
 * @arg0:		Argument 0 to requested PM-API call
 * @arg1:		Argument 1 to requested PM-API call
 * @arg2:		Argument 2 to requested PM-API call
 * @arg3:		Argument 3 to requested PM-API call
 * @ret_payload:	Returned value array
 *
 * Invoke platform management function for SMC or HVC call, depending on
 * configuration.
 * Following SMC Calling Convention (SMCCC) for SMC64:
 * Pm Function Identifier,
 * PM_SIP_SVC + PM_API_ID =
 *	((SMC_TYPE_FAST << FUNCID_TYPE_SHIFT)
 *	((SMC_64) << FUNCID_CC_SHIFT)
 *	((SIP_START) << FUNCID_OEN_SHIFT)
 *	((PM_API_ID) & FUNCID_NUM_MASK))
 *
 * PM_SIP_SVC	- Registered ZynqMP SIP Service Call.
 * PM_API_ID	- Platform Management API ID.
 *
 * Return: Returns status, either success or error+reason
 */
int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,
			u32 arg2, u32 arg3, u32 *ret_payload)
{
	/*
	 * Added SIP service call Function Identifier
	 * Make sure to stay in x0 register
	 */
	u64 smc_arg[4];

	smc_arg[0] = PM_SIP_SVC | pm_api_id;
	smc_arg[1] = ((u64)arg1 << 32) | arg0;
	smc_arg[2] = ((u64)arg3 << 32) | arg2;

	return do_fw_call(smc_arg[0], smc_arg[1], smc_arg[2], ret_payload);
}

static u32 pm_api_version;
static u32 pm_tz_version;

/**
 * zynqmp_pm_get_api_version() - Get version number of PMU PM firmware
 * @version:	Returned version value
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_get_api_version(u32 *version)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	if (!version)
		return -EINVAL;

	/* Check is PM API version already verified */
	if (pm_api_version > 0) {
		*version = pm_api_version;
		return 0;
	}
	ret = zynqmp_pm_invoke_fn(PM_GET_API_VERSION, 0, 0, 0, 0, ret_payload);
	*version = ret_payload[1];

	return ret;
}

/**
 * zynqmp_pm_get_chipid - Get silicon ID registers
 * @idcode:     IDCODE register
 * @version:    version register
 *
 * Return:      Returns the status of the operation and the idcode and version
 *              registers in @idcode and @version.
 */
static int zynqmp_pm_get_chipid(u32 *idcode, u32 *version)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	if (!idcode || !version)
		return -EINVAL;

	ret = zynqmp_pm_invoke_fn(PM_GET_CHIPID, 0, 0, 0, 0, ret_payload);
	*idcode = ret_payload[1];
	*version = ret_payload[2];

	return ret;
}

/**
 * zynqmp_pm_get_trustzone_version() - Get secure trustzone firmware version
 * @version:	Returned version value
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_get_trustzone_version(u32 *version)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	if (!version)
		return -EINVAL;

	/* Check is PM trustzone version already verified */
	if (pm_tz_version > 0) {
		*version = pm_tz_version;
		return 0;
	}
	ret = zynqmp_pm_invoke_fn(PM_GET_TRUSTZONE_VERSION, 0, 0,
				  0, 0, ret_payload);
	*version = ret_payload[1];

	return ret;
}

/**
 * get_set_conduit_method() - Choose SMC or HVC based communication
 * @np:		Pointer to the device_node structure
 *
 * Use SMC or HVC-based functions to communicate with EL2/EL3.
 *
 * Return: Returns 0 on success or error code
 */
static int get_set_conduit_method(struct device_node *np)
{
	const char *method;

	if (of_property_read_string(np, "method", &method)) {
		pr_warn("%s missing \"method\" property\n", __func__);
		return -ENXIO;
	}

	if (!strcmp("hvc", method)) {
		do_fw_call = do_fw_call_hvc;
	} else if (!strcmp("smc", method)) {
		do_fw_call = do_fw_call_smc;
	} else {
		pr_warn("%s Invalid \"method\" property: %s\n",
			__func__, method);
		return -EINVAL;
	}

	return 0;
}

/**
 * zynqmp_pm_query_data() - Get query data from firmware
 * @qdata:	Variable to the zynqmp_pm_query_data structure
 * @out:	Returned output value
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_query_data(struct zynqmp_pm_query_data qdata, u32 *out)
{
	int ret;

	ret = zynqmp_pm_invoke_fn(PM_QUERY_DATA, qdata.qid, qdata.arg1,
				  qdata.arg2, qdata.arg3, out);

	/*
	 * For clock name query, all bytes in SMC response are clock name
	 * characters and return code is always success. For invalid clocks,
	 * clock name bytes would be zeros.
	 */
	return qdata.qid == PM_QID_CLOCK_GET_NAME ? 0 : ret;
}

/**
 * zynqmp_pm_clock_enable() - Enable the clock for given id
 * @clock_id:	ID of the clock to be enabled
 *
 * This function is used by master to enable the clock
 * including peripherals and PLL clocks.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_enable(u32 clock_id)
{
	return zynqmp_pm_invoke_fn(PM_CLOCK_ENABLE, clock_id, 0, 0, 0, NULL);
}

/**
 * zynqmp_pm_clock_disable() - Disable the clock for given id
 * @clock_id:	ID of the clock to be disable
 *
 * This function is used by master to disable the clock
 * including peripherals and PLL clocks.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_disable(u32 clock_id)
{
	return zynqmp_pm_invoke_fn(PM_CLOCK_DISABLE, clock_id, 0, 0, 0, NULL);
}

/**
 * zynqmp_pm_clock_getstate() - Get the clock state for given id
 * @clock_id:	ID of the clock to be queried
 * @state:	1/0 (Enabled/Disabled)
 *
 * This function is used by master to get the state of clock
 * including peripherals and PLL clocks.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_getstate(u32 clock_id, u32 *state)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETSTATE, clock_id, 0,
				  0, 0, ret_payload);
	*state = ret_payload[1];

	return ret;
}

/**
 * zynqmp_pm_clock_setdivider() - Set the clock divider for given id
 * @clock_id:	ID of the clock
 * @divider:	divider value
 *
 * This function is used by master to set divider for any clock
 * to achieve desired rate.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_setdivider(u32 clock_id, u32 divider)
{
	return zynqmp_pm_invoke_fn(PM_CLOCK_SETDIVIDER, clock_id, divider,
				   0, 0, NULL);
}

/**
 * zynqmp_pm_clock_getdivider() - Get the clock divider for given id
 * @clock_id:	ID of the clock
 * @divider:	divider value
 *
 * This function is used by master to get divider values
 * for any clock.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_getdivider(u32 clock_id, u32 *divider)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETDIVIDER, clock_id, 0,
				  0, 0, ret_payload);
	*divider = ret_payload[1];

	return ret;
}

/**
 * zynqmp_pm_clock_setrate() - Set the clock rate for given id
 * @clock_id:	ID of the clock
 * @rate:	rate value in hz
 *
 * This function is used by master to set rate for any clock.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_setrate(u32 clock_id, u64 rate)
{
	return zynqmp_pm_invoke_fn(PM_CLOCK_SETRATE, clock_id,
				   lower_32_bits(rate),
				   upper_32_bits(rate),
				   0, NULL);
}

/**
 * zynqmp_pm_clock_getrate() - Get the clock rate for given id
 * @clock_id:	ID of the clock
 * @rate:	rate value in hz
 *
 * This function is used by master to get rate
 * for any clock.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_getrate(u32 clock_id, u64 *rate)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETRATE, clock_id, 0,
				  0, 0, ret_payload);
	*rate = ((u64)ret_payload[2] << 32) | ret_payload[1];

	return ret;
}

/**
 * zynqmp_pm_clock_setparent() - Set the clock parent for given id
 * @clock_id:	ID of the clock
 * @parent_id:	parent id
 *
 * This function is used by master to set parent for any clock.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_setparent(u32 clock_id, u32 parent_id)
{
	return zynqmp_pm_invoke_fn(PM_CLOCK_SETPARENT, clock_id,
				   parent_id, 0, 0, NULL);
}

/**
 * zynqmp_pm_clock_getparent() - Get the clock parent for given id
 * @clock_id:	ID of the clock
 * @parent_id:	parent id
 *
 * This function is used by master to get parent index
 * for any clock.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETPARENT, clock_id, 0,
				  0, 0, ret_payload);
	*parent_id = ret_payload[1];

	return ret;
}

/**
 * zynqmp_is_valid_ioctl() - Check whether IOCTL ID is valid or not
 * @ioctl_id:	IOCTL ID
 *
 * Return: 1 if IOCTL is valid else 0
 */
static inline int zynqmp_is_valid_ioctl(u32 ioctl_id)
{
	switch (ioctl_id) {
	case IOCTL_SET_PLL_FRAC_MODE:
	case IOCTL_GET_PLL_FRAC_MODE:
	case IOCTL_SET_PLL_FRAC_DATA:
	case IOCTL_GET_PLL_FRAC_DATA:
		return 1;
	default:
		return 0;
	}
}

/**
 * zynqmp_pm_ioctl() - PM IOCTL API for device control and configs
 * @node_id:	Node ID of the device
 * @ioctl_id:	ID of the requested IOCTL
 * @arg1:	Argument 1 to requested IOCTL call
 * @arg2:	Argument 2 to requested IOCTL call
 * @out:	Returned output value
 *
 * This function calls IOCTL to firmware for device control and configuration.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
			   u32 *out)
{
	if (!zynqmp_is_valid_ioctl(ioctl_id))
		return -EINVAL;

	return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, ioctl_id,
				   arg1, arg2, out);
}

/**
 * zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
 * @reset:		Reset to be configured
 * @assert_flag:	Flag stating should reset be asserted (1) or
 *			released (0)
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset,
				  const enum zynqmp_pm_reset_action assert_flag)
{
	return zynqmp_pm_invoke_fn(PM_RESET_ASSERT, reset, assert_flag,
				   0, 0, NULL);
}

/**
 * zynqmp_pm_reset_get_status - Get status of the reset
 * @reset:      Reset whose status should be returned
 * @status:     Returned status
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset,
				      u32 *status)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	if (!status)
		return -EINVAL;

	ret = zynqmp_pm_invoke_fn(PM_RESET_GET_STATUS, reset, 0,
				  0, 0, ret_payload);
	*status = ret_payload[1];

	return ret;
}

/**
 * zynqmp_pm_fpga_load - Perform the fpga load
 * @address:	Address to write to
 * @size:	pl bitstream size
 * @flags:	Bitstream type
 *	-XILINX_ZYNQMP_PM_FPGA_FULL:  FPGA full reconfiguration
 *	-XILINX_ZYNQMP_PM_FPGA_PARTIAL: FPGA partial reconfiguration
 *
 * This function provides access to pmufw. To transfer
 * the required bitstream into PL.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_fpga_load(const u64 address, const u32 size,
			       const u32 flags)
{
	return zynqmp_pm_invoke_fn(PM_FPGA_LOAD, lower_32_bits(address),
				   upper_32_bits(address), size, flags, NULL);
}

/**
 * zynqmp_pm_fpga_get_status - Read value from PCAP status register
 * @value: Value to read
 *
 * This function provides access to the pmufw to get the PCAP
 * status
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_fpga_get_status(u32 *value)
{
	u32 ret_payload[PAYLOAD_ARG_CNT];
	int ret;

	if (!value)
		return -EINVAL;

	ret = zynqmp_pm_invoke_fn(PM_FPGA_GET_STATUS, 0, 0, 0, 0, ret_payload);
	*value = ret_payload[1];

	return ret;
}

/**
 * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller
 *			       master has initialized its own power management
 *
 * This API function is to be used for notify the power management controller
 * about the completed power management initialization.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_init_finalize(void)
{
	return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, 0, 0, 0, 0, NULL);
}

/**
 * zynqmp_pm_set_suspend_mode()	- Set system suspend mode
 * @mode:	Mode to set for system suspend
 *
 * This API function is used to set mode of system suspend.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_set_suspend_mode(u32 mode)
{
	return zynqmp_pm_invoke_fn(PM_SET_SUSPEND_MODE, mode, 0, 0, 0, NULL);
}

/**
 * zynqmp_pm_request_node() - Request a node with specific capabilities
 * @node:		Node ID of the slave
 * @capabilities:	Requested capabilities of the slave
 * @qos:		Quality of service (not supported)
 * @ack:		Flag to specify whether acknowledge is requested
 *
 * This function is used by master to request particular node from firmware.
 * Every master must request node before using it.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
				  const u32 qos,
				  const enum zynqmp_pm_request_ack ack)
{
	return zynqmp_pm_invoke_fn(PM_REQUEST_NODE, node, capabilities,
				   qos, ack, NULL);
}

/**
 * zynqmp_pm_release_node() - Release a node
 * @node:	Node ID of the slave
 *
 * This function is used by master to inform firmware that master
 * has released node. Once released, master must not use that node
 * without re-request.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_release_node(const u32 node)
{
	return zynqmp_pm_invoke_fn(PM_RELEASE_NODE, node, 0, 0, 0, NULL);
}

/**
 * zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves
 * @node:		Node ID of the slave
 * @capabilities:	Requested capabilities of the slave
 * @qos:		Quality of service (not supported)
 * @ack:		Flag to specify whether acknowledge is requested
 *
 * This API function is to be used for slaves a PU already has requested
 * to change its capabilities.
 *
 * Return: Returns status, either success or error+reason
 */
static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
				     const u32 qos,
				     const enum zynqmp_pm_request_ack ack)
{
	return zynqmp_pm_invoke_fn(PM_SET_REQUIREMENT, node, capabilities,
				   qos, ack, NULL);
}

static const struct zynqmp_eemi_ops eemi_ops = {
	.get_api_version = zynqmp_pm_get_api_version,
	.get_chipid = zynqmp_pm_get_chipid,
	.query_data = zynqmp_pm_query_data,
	.clock_enable = zynqmp_pm_clock_enable,
	.clock_disable = zynqmp_pm_clock_disable,
	.clock_getstate = zynqmp_pm_clock_getstate,
	.clock_setdivider = zynqmp_pm_clock_setdivider,
	.clock_getdivider = zynqmp_pm_clock_getdivider,
	.clock_setrate = zynqmp_pm_clock_setrate,
	.clock_getrate = zynqmp_pm_clock_getrate,
	.clock_setparent = zynqmp_pm_clock_setparent,
	.clock_getparent = zynqmp_pm_clock_getparent,
	.ioctl = zynqmp_pm_ioctl,
	.reset_assert = zynqmp_pm_reset_assert,
	.reset_get_status = zynqmp_pm_reset_get_status,
	.init_finalize = zynqmp_pm_init_finalize,
	.set_suspend_mode = zynqmp_pm_set_suspend_mode,
	.request_node = zynqmp_pm_request_node,
	.release_node = zynqmp_pm_release_node,
	.set_requirement = zynqmp_pm_set_requirement,
	.fpga_load = zynqmp_pm_fpga_load,
	.fpga_get_status = zynqmp_pm_fpga_get_status,
};

/**
 * zynqmp_pm_get_eemi_ops - Get eemi ops functions
 *
 * Return: Pointer of eemi_ops structure
 */
const struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
	if (eemi_ops_tbl)
		return eemi_ops_tbl;
	else
		return ERR_PTR(-EPROBE_DEFER);

}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_eemi_ops);

static int zynqmp_firmware_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np;
	int ret;

	np = of_find_compatible_node(NULL, NULL, "xlnx,zynqmp");
	if (!np) {
		np = of_find_compatible_node(NULL, NULL, "xlnx,versal");
		if (!np)
			return 0;
	}
	of_node_put(np);

	ret = get_set_conduit_method(dev->of_node);
	if (ret)
		return ret;

	/* Check PM API version number */
	zynqmp_pm_get_api_version(&pm_api_version);
	if (pm_api_version < ZYNQMP_PM_VERSION) {
		panic("%s Platform Management API version error. Expected: v%d.%d - Found: v%d.%d\n",
		      __func__,
		      ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR,
		      pm_api_version >> 16, pm_api_version & 0xFFFF);
	}

	pr_info("%s Platform Management API v%d.%d\n", __func__,
		pm_api_version >> 16, pm_api_version & 0xFFFF);

	/* Check trustzone version number */
	ret = zynqmp_pm_get_trustzone_version(&pm_tz_version);
	if (ret)
		panic("Legacy trustzone found without version support\n");

	if (pm_tz_version < ZYNQMP_TZ_VERSION)
		panic("%s Trustzone version error. Expected: v%d.%d - Found: v%d.%d\n",
		      __func__,
		      ZYNQMP_TZ_VERSION_MAJOR, ZYNQMP_TZ_VERSION_MINOR,
		      pm_tz_version >> 16, pm_tz_version & 0xFFFF);

	pr_info("%s Trustzone version v%d.%d\n", __func__,
		pm_tz_version >> 16, pm_tz_version & 0xFFFF);

	/* Assign eemi_ops_table */
	eemi_ops_tbl = &eemi_ops;

	zynqmp_pm_api_debugfs_init();

	ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, firmware_devs,
			      ARRAY_SIZE(firmware_devs), NULL, 0, NULL);
	if (ret) {
		dev_err(&pdev->dev, "failed to add MFD devices %d\n", ret);
		return ret;
	}

	return of_platform_populate(dev->of_node, NULL, NULL, dev);
}

static int zynqmp_firmware_remove(struct platform_device *pdev)
{
	mfd_remove_devices(&pdev->dev);
	zynqmp_pm_api_debugfs_exit();

	return 0;
}

static const struct of_device_id zynqmp_firmware_of_match[] = {
	{.compatible = "xlnx,zynqmp-firmware"},
	{.compatible = "xlnx,versal-firmware"},
	{},
};
MODULE_DEVICE_TABLE(of, zynqmp_firmware_of_match);

static struct platform_driver zynqmp_firmware_driver = {
	.driver = {
		.name = "zynqmp_firmware",
		.of_match_table = zynqmp_firmware_of_match,
	},
	.probe = zynqmp_firmware_probe,
	.remove = zynqmp_firmware_remove,
};
module_platform_driver(zynqmp_firmware_driver);