summaryrefslogtreecommitdiff
path: root/src/southbridge/intel/lynxpoint/lpc.c
blob: ff50476a6240cf0759ef110d52b573d98643c241 (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
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2008-2009 coresystems GmbH
 * Copyright 2013 Google Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of
 * the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <pc80/mc146818rtc.h>
#include <pc80/isa-dma.h>
#include <pc80/i8259.h>
#include <arch/io.h>
#include <arch/ioapic.h>
#include <arch/acpi.h>
#include <cpu/cpu.h>
#include <cpu/x86/smm.h>
#include <elog.h>
#include <cbmem.h>
#include <string.h>
#include "nvs.h"
#include "pch.h"

#define NMI_OFF	0

#define ENABLE_ACPI_MODE_IN_COREBOOT	0

typedef struct southbridge_intel_lynxpoint_config config_t;

/**
 * Set miscellanous static southbridge features.
 *
 * @param dev PCI device with I/O APIC control registers
 */
static void pch_enable_ioapic(struct device *dev)
{
	u32 reg32;

	/* Enable ACPI I/O range decode */
	pci_write_config8(dev, ACPI_CNTL, ACPI_EN);

	set_ioapic_id(IO_APIC_ADDR, 0x02);

	/* affirm full set of redirection table entries ("write once") */
	reg32 = io_apic_read(IO_APIC_ADDR, 0x01);
	if (pch_is_lp()) {
		/* PCH-LP has 39 redirection entries */
		reg32 &= ~0x00ff0000;
		reg32 |= 0x00270000;
	}
	io_apic_write(IO_APIC_ADDR, 0x01, reg32);

	/*
	 * Select Boot Configuration register (0x03) and
	 * use Processor System Bus (0x01) to deliver interrupts.
	 */
	io_apic_write(IO_APIC_ADDR, 0x03, 0x01);
}

static void pch_enable_serial_irqs(struct device *dev)
{
	/* Set packet length and toggle silent mode bit for one frame. */
	pci_write_config8(dev, SERIRQ_CNTL,
			  (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0));
#if !CONFIG_SERIRQ_CONTINUOUS_MODE
	pci_write_config8(dev, SERIRQ_CNTL,
			  (1 << 7) | (0 << 6) | ((21 - 17) << 2) | (0 << 0));
#endif
}

/* PIRQ[n]_ROUT[3:0] - PIRQ Routing Control
 * 0x00 - 0000 = Reserved
 * 0x01 - 0001 = Reserved
 * 0x02 - 0010 = Reserved
 * 0x03 - 0011 = IRQ3
 * 0x04 - 0100 = IRQ4
 * 0x05 - 0101 = IRQ5
 * 0x06 - 0110 = IRQ6
 * 0x07 - 0111 = IRQ7
 * 0x08 - 1000 = Reserved
 * 0x09 - 1001 = IRQ9
 * 0x0A - 1010 = IRQ10
 * 0x0B - 1011 = IRQ11
 * 0x0C - 1100 = IRQ12
 * 0x0D - 1101 = Reserved
 * 0x0E - 1110 = IRQ14
 * 0x0F - 1111 = IRQ15
 * PIRQ[n]_ROUT[7] - PIRQ Routing Control
 * 0x80 - The PIRQ is not routed.
 */

static void pch_pirq_init(device_t dev)
{
	device_t irq_dev;
	/* Get the chip configuration */
	config_t *config = dev->chip_info;

	pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing);
	pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing);
	pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing);
	pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing);

	pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing);
	pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing);
	pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing);
	pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing);

	/* Eric Biederman once said we should let the OS do this.
	 * I am not so sure anymore he was right.
	 */

	for(irq_dev = all_devices; irq_dev; irq_dev = irq_dev->next) {
		u8 int_pin=0, int_line=0;

		if (!irq_dev->enabled || irq_dev->path.type != DEVICE_PATH_PCI)
			continue;

		int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN);

		switch (int_pin) {
		case 1: /* INTA# */ int_line = config->pirqa_routing; break;
		case 2: /* INTB# */ int_line = config->pirqb_routing; break;
		case 3: /* INTC# */ int_line = config->pirqc_routing; break;
		case 4: /* INTD# */ int_line = config->pirqd_routing; break;
		}

		if (!int_line)
			continue;

		pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, int_line);
	}
}

static void pch_gpi_routing(device_t dev)
{
	/* Get the chip configuration */
	config_t *config = dev->chip_info;
	u32 reg32 = 0;

	/* An array would be much nicer here, or some
	 * other method of doing this.
	 */
	reg32 |= (config->gpi0_routing & 0x03) << 0;
	reg32 |= (config->gpi1_routing & 0x03) << 2;
	reg32 |= (config->gpi2_routing & 0x03) << 4;
	reg32 |= (config->gpi3_routing & 0x03) << 6;
	reg32 |= (config->gpi4_routing & 0x03) << 8;
	reg32 |= (config->gpi5_routing & 0x03) << 10;
	reg32 |= (config->gpi6_routing & 0x03) << 12;
	reg32 |= (config->gpi7_routing & 0x03) << 14;
	reg32 |= (config->gpi8_routing & 0x03) << 16;
	reg32 |= (config->gpi9_routing & 0x03) << 18;
	reg32 |= (config->gpi10_routing & 0x03) << 20;
	reg32 |= (config->gpi11_routing & 0x03) << 22;
	reg32 |= (config->gpi12_routing & 0x03) << 24;
	reg32 |= (config->gpi13_routing & 0x03) << 26;
	reg32 |= (config->gpi14_routing & 0x03) << 28;
	reg32 |= (config->gpi15_routing & 0x03) << 30;

	pci_write_config32(dev, 0xb8, reg32);
}

static void pch_power_options(device_t dev)
{
	u8 reg8;
	u16 reg16;
	u32 reg32;
	const char *state;
	/* Get the chip configuration */
	config_t *config = dev->chip_info;
	u16 pmbase = get_pmbase();
	int pwr_on=CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
	int nmi_option;

	/* Which state do we want to goto after g3 (power restored)?
	 * 0 == S0 Full On
	 * 1 == S5 Soft Off
	 *
	 * If the option is not existent (Laptops), use Kconfig setting.
	 */
	get_option(&pwr_on, "power_on_after_fail");

	reg16 = pci_read_config16(dev, GEN_PMCON_3);
	reg16 &= 0xfffe;
	switch (pwr_on) {
	case MAINBOARD_POWER_OFF:
		reg16 |= 1;
		state = "off";
		break;
	case MAINBOARD_POWER_ON:
		reg16 &= ~1;
		state = "on";
		break;
	case MAINBOARD_POWER_KEEP:
		reg16 &= ~1;
		state = "state keep";
		break;
	default:
		state = "undefined";
	}

	reg16 &= ~(3 << 4);	/* SLP_S4# Assertion Stretch 4s */
	reg16 |= (1 << 3);	/* SLP_S4# Assertion Stretch Enable */

	reg16 &= ~(1 << 10);
	reg16 |= (1 << 11);	/* SLP_S3# Min Assertion Width 50ms */

	reg16 |= (1 << 12);	/* Disable SLP stretch after SUS well */

	pci_write_config16(dev, GEN_PMCON_3, reg16);
	printk(BIOS_INFO, "Set power %s after power failure.\n", state);

	/* Set up NMI on errors. */
	reg8 = inb(0x61);
	reg8 &= 0x0f;		/* Higher Nibble must be 0 */
	reg8 &= ~(1 << 3);	/* IOCHK# NMI Enable */
	// reg8 &= ~(1 << 2);	/* PCI SERR# Enable */
	reg8 |= (1 << 2); /* PCI SERR# Disable for now */
	outb(reg8, 0x61);

	reg8 = inb(0x70);
	nmi_option = NMI_OFF;
	get_option(&nmi_option, "nmi");
	if (nmi_option) {
		printk(BIOS_INFO, "NMI sources enabled.\n");
		reg8 &= ~(1 << 7);	/* Set NMI. */
	} else {
		printk(BIOS_INFO, "NMI sources disabled.\n");
		reg8 |= ( 1 << 7);	/* Can't mask NMI from PCI-E and NMI_NOW */
	}
	outb(reg8, 0x70);

	/* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
	reg16 = pci_read_config16(dev, GEN_PMCON_1);
	reg16 &= ~(3 << 0);	// SMI# rate 1 minute
	reg16 &= ~(1 << 10);	// Disable BIOS_PCI_EXP_EN for native PME
	pci_write_config16(dev, GEN_PMCON_1, reg16);

	/*
	 * Set the board's GPI routing on LynxPoint-H.
	 * This is done as part of GPIO configuration on LynxPoint-LP.
	 */
	if (pch_is_lp())
		pch_gpi_routing(dev);

	/* GPE setup based on device tree configuration */
	enable_all_gpe(config->gpe0_en_1, config->gpe0_en_2,
		       config->gpe0_en_3, config->gpe0_en_4);

	/* SMI setup based on device tree configuration */
	enable_alt_smi(config->alt_gp_smi_en);

	/* Set up power management block and determine sleep mode */
	reg32 = inl(pmbase + 0x04); // PM1_CNT
	reg32 &= ~(7 << 10);	// SLP_TYP
	reg32 |= (1 << 0);	// SCI_EN
	outl(reg32, pmbase + 0x04);

	/* Clear magic status bits to prevent unexpected wake */
	reg32 = RCBA32(0x3310);
	reg32 |= (1 << 4)|(1 << 5)|(1 << 0);
	RCBA32(0x3310) = reg32;

	reg32 = RCBA32(0x3f02);
	reg32 &= ~0xf;
	RCBA32(0x3f02) = reg32;
}

static void pch_rtc_init(struct device *dev)
{
	u8 reg8;
	int rtc_failed;

	reg8 = pci_read_config8(dev, GEN_PMCON_3);
	rtc_failed = reg8 & RTC_BATTERY_DEAD;
	if (rtc_failed) {
		reg8 &= ~RTC_BATTERY_DEAD;
		pci_write_config8(dev, GEN_PMCON_3, reg8);
#if CONFIG_ELOG
		elog_add_event(ELOG_TYPE_RTC_RESET);
#endif
	}
	printk(BIOS_DEBUG, "rtc_failed = 0x%x\n", rtc_failed);

	rtc_init(rtc_failed);
}

/* LynxPoint PCH Power Management init */
static void lpt_pm_init(struct device *dev)
{
	printk(BIOS_DEBUG, "LynxPoint PM init\n");
}

const struct rcba_config_instruction lpt_lp_pm_rcba[] = {
	RCBA_RMW_REG_32(0x232c, ~1, 0x00000000),  /* 4 */
	RCBA_RMW_REG_32(0x1100, ~0xc000, 0xc000),  /* 5 */
	RCBA_RMW_REG_32(0x1100, ~0, 0x00000100),  /* 6 */
	RCBA_RMW_REG_32(0x1100, ~0, 0x0000003f),  /* 7 */
	RCBA_RMW_REG_32(0x2320, ~0x60, 0x10),     /* 8? */
	RCBA_RMW_REG_32(0x3314,  0, 0x00012fff),  /* 9? */
	RCBA_RMW_REG_32(0x3318,  0, 0x0dcf0400),  /* 10? */
	RCBA_RMW_REG_32(0x3324,  0, 0x04000000),  /* 11 */
	RCBA_RMW_REG_32(0x3368,  0, 0x00041400),  /* 12? */
	RCBA_RMW_REG_32(0x3388,  0, 0x3f8ddbff),  /* 13? */
	RCBA_RMW_REG_32(0x33ac,  0, 0x00007001),  /* 14? */
	RCBA_RMW_REG_32(0x33b0,  0, 0x00181900),  /* 15? */
	RCBA_RMW_REG_32(0x33c0,  0, 0x00060A00),  /* 16? */
	RCBA_RMW_REG_32(0x33d0,  0, 0x06200840),  /* 17? */
	RCBA_RMW_REG_32(0x3a28,  0, 0x01010101),  /* 19 */
	RCBA_RMW_REG_32(0x3a2c,  0, 0x04040404),  /* 20 */
	RCBA_RMW_REG_32(0x2b1c,  0, 0x03808033),  /* 23? */
	RCBA_RMW_REG_32(0x2b34,  0, 0x80000008),  /* 24 */
	RCBA_RMW_REG_32(0x3348,  0, 0x022ddfff),  /* 25? */
	RCBA_RMW_REG_32(0x334c,  0, 0x00000001),  /* 26 */
	RCBA_RMW_REG_32(0x3358,  0, 0x0001c000),  /* 27 */
	RCBA_RMW_REG_32(0x3380,  0, 0x3f8ddbff),  /* 28 */
	RCBA_RMW_REG_32(0x3384,  0, 0x0001c7e1),  /* 29 */
	RCBA_RMW_REG_32(0x338c,  0, 0x0001c7e1),  /* ? */
	RCBA_RMW_REG_32(0x3398,  0, 0x0001c000),  /* 30 */
	RCBA_RMW_REG_32(0x33a8,  0, 0x00181900),  /* 31? */
	RCBA_RMW_REG_32(0x33dc,  0, 0x00080000),  /* 32 */
	RCBA_RMW_REG_32(0x33e0,  0, 0x00000001),  /* 33 */
	RCBA_RMW_REG_32(0x3a20,  0, 0x00000404),  /* 34 */
	RCBA_RMW_REG_32(0x3a24,  0, 0x01010101),  /* 35 */
	RCBA_RMW_REG_32(0x3a30,  0, 0x01010101),  /* 36 */
	RCBA_RMW_REG_32(0x0410, ~0, 0x00000003),  /* 42 */
	RCBA_RMW_REG_32(0x2618, ~0, 0x08000000),  /* 43 */
	RCBA_RMW_REG_32(0x2600, ~0, 0x00000008),  /* 44 */
	RCBA_RMW_REG_32(0x33b4,  0, 0x00007001),  /* 46? */
	RCBA_RMW_REG_32(0x3350,  0, 0x022ddfff),  /* 47? */
	RCBA_RMW_REG_32(0x3354,  0, 0x00000001),  /* ? */
	RCBA_RMW_REG_32(0x33d4, ~0, 0x08000000),  /* Power Optimizer */
	RCBA_RMW_REG_32(0x33c8, ~0, 0x08000080),  /* Power Optimizer */
	RCBA_RMW_REG_32(0x2b10,  0, 0x0000883c),  /* Power Optimizer */
	RCBA_RMW_REG_32(0x2b14,  0, 0x1e0a4616),  /* Power Optimizer */
	RCBA_RMW_REG_32(0x2b24,  0, 0x40000005),  /* Power Optimizer */
	RCBA_RMW_REG_32(0x2b20,  0, 0x0005db01),  /* Power Optimizer */
	RCBA_RMW_REG_32(0x3a80,  0, 0x05145005),  /* 21? */
	RCBA_END_CONFIG
};

/* LynxPoint LP PCH Power Management init */
static void lpt_lp_pm_init(struct device *dev)
{
	struct southbridge_intel_lynxpoint_config *config = dev->chip_info;
	u32 data;

	printk(BIOS_DEBUG, "LynxPoint LP PM init\n");

	pci_write_config8(dev, 0xa9, 0x46);

	pch_config_rcba(lpt_lp_pm_rcba);

	pci_write_config32(dev, 0xac,
		pci_read_config32(dev, 0xac) | (1 << 21));

	pch_iobp_update(0xCA000000, ~0UL, 0x00000009);

	/* Set RCBA CIR28 0x3A84 based on SATA port enables */
	data = 0x00001005;
	/* Port 3 and 2 disabled */
	if ((config->sata_port_map & ((1 << 3)|(1 << 2))) == 0)
		data |= (1 << 24) | (1 << 26);
	/* Port 1 and 0 disabled */
	if ((config->sata_port_map & ((1 << 1)|(1 << 0))) == 0)
		data |= (1 << 20) | (1 << 18);
	RCBA32(0x3a84) = data;

	/* Set RCBA 0x2b1c[29]=1 if DSP disabled */
	if (RCBA32(FD) & PCH_DISABLE_ADSPD)
		RCBA32_OR(0x2b1c, (1 << 29));

	/* Lock */
	RCBA32_OR(0x3a6c, 0x00000001);

	/* Set RCBA 0x33D4 after other setup */
	RCBA32_OR(0x33d4, 0x2fff2fb1);

	/* Set RCBA 0x33C8[15]=1 as last step */
	RCBA32_OR(0x33c8, (1 << 15));
}

static void enable_hpet(void)
{
	u32 reg32;

	/* Move HPET to default address 0xfed00000 and enable it */
	reg32 = RCBA32(HPTC);
	reg32 |= (1 << 7); // HPET Address Enable
	reg32 &= ~(3 << 0);
	RCBA32(HPTC) = reg32;
	/* Read it back to stick. It's affected by posted write syndrome. */
	reg32 = RCBA32(HPTC);
}

static void enable_clock_gating(device_t dev)
{
	/* LynxPoint Mobile */
	u32 reg32;
	u16 reg16;

	/* DMI */
	RCBA32_AND_OR(0x2234, ~0UL, 0xf);
	reg16 = pci_read_config16(dev, GEN_PMCON_1);
	reg16 |= (1 << 11) | (1 << 12) | (1 << 14);
	reg16 |= (1 << 2); // PCI CLKRUN# Enable
	pci_write_config16(dev, GEN_PMCON_1, reg16);
	RCBA32_OR(0x900, (1 << 14));

	reg32 = RCBA32(CG);
	reg32 |= (1 << 22); // HDA Dynamic
	reg32 |= (1 << 31); // LPC Dynamic
	reg32 |= (1 << 16); // PCIe Dynamic
	reg32 |= (1 << 27); // HPET Dynamic
	reg32 |= (1 << 28); // GPIO Dynamic
	RCBA32(CG) = reg32;

	RCBA32_OR(0x38c0, 0x7); // SPI Dynamic
}

static void enable_lp_clock_gating(device_t dev)
{
	/* LynxPoint LP */
	u32 reg32;
	u16 reg16;

	/* DMI */
	RCBA32_AND_OR(0x2234, ~0UL, 0xf);
	reg16 = pci_read_config16(dev, GEN_PMCON_1);
	reg16 &= ~((1 << 11) | (1 << 14));
	reg16 |= (1 << 5) | (1 << 6) | (1 << 7) | (1 << 12) | (1 << 13);
	reg16 |= (1 << 2); // PCI CLKRUN# Enable
	pci_write_config16(dev, GEN_PMCON_1, reg16);

	reg32 = pci_read_config32(dev, 0x64);
	reg32 |= (1 << 6);
	pci_write_config32(dev, 0x64, reg32);

	RCBA32_AND_OR(0x2614, 0x8bffffff, 0x0a206500);
	RCBA32_OR(0x900, 0x0000031f);

	reg32 = RCBA32(CG);
	if (RCBA32(0x3454) & (1 << 4))
		reg32 &= ~(1 << 29); // LPC Dynamic
	else
		reg32 |= (1 << 29); // LPC Dynamic
	reg32 |= (1 << 31); // LP LPC
	reg32 |= (1 << 30); // LP BLA
	reg32 |= (1 << 28); // GPIO Dynamic
	reg32 |= (1 << 27); // HPET Dynamic
	reg32 |= (1 << 26); // Generic Platform Event Clock
	if (RCBA32(BUC) & PCH_DISABLE_GBE)
		reg32 |= (1 << 23); // GbE Static
	reg32 |= (1 << 22); // HDA Dynamic
	reg32 |= (1 << 16); // PCI Dynamic
	RCBA32(CG) = reg32;

	RCBA32_OR(0x3434, 0x7); // LP LPC

	RCBA32_AND_OR(0x333c, 0xffcfffff, 0x00c00000); // SATA

	RCBA32_OR(0x38c0, 0x3c07); // SPI Dynamic

	pch_iobp_update(0xCF000000, ~0UL, 0x00007001);
	pch_iobp_update(0xCE00C000, ~1UL, 0x00000000); // bit0=0 in BWG 1.4.0
}

static void pch_set_acpi_mode(void)
{
#if CONFIG_HAVE_SMI_HANDLER
	if (acpi_slp_type != 3) {
#if ENABLE_ACPI_MODE_IN_COREBOOT
		printk(BIOS_DEBUG, "Enabling ACPI via APMC:\n");
		outb(APM_CNT_ACPI_ENABLE, APM_CNT);
		printk(BIOS_DEBUG, "done.\n");
#else
		printk(BIOS_DEBUG, "Disabling ACPI via APMC:\n");
		outb(APM_CNT_ACPI_DISABLE, APM_CNT);
		printk(BIOS_DEBUG, "done.\n");
#endif
	}
#endif /* CONFIG_HAVE_SMI_HANDLER */
}

static void pch_disable_smm_only_flashing(struct device *dev)
{
	u8 reg8;

	printk(BIOS_SPEW, "Enabling BIOS updates outside of SMM... ");
	reg8 = pci_read_config8(dev, 0xdc);	/* BIOS_CNTL */
	reg8 &= ~(1 << 5);
	pci_write_config8(dev, 0xdc, reg8);
}

static void pch_fixups(struct device *dev)
{
	u8 gen_pmcon_2;

	/* Indicate DRAM init done for MRC S3 to know it can resume */
	gen_pmcon_2 = pci_read_config8(dev, GEN_PMCON_2);
	gen_pmcon_2 |= (1 << 7);
	pci_write_config8(dev, GEN_PMCON_2, gen_pmcon_2);

	/*
	 * Enable DMI ASPM in the PCH
	 */
	RCBA32_AND_OR(0x2304, ~(1 << 10), 0);
	RCBA32_OR(0x21a4, (1 << 11)|(1 << 10));
	RCBA32_OR(0x21a8, 0x3);
}

static void lpc_init(struct device *dev)
{
	printk(BIOS_DEBUG, "pch: lpc_init\n");

	/* Set the value for PCI command register. */
	pci_write_config16(dev, PCI_COMMAND, 0x000f);

	/* IO APIC initialization. */
	pch_enable_ioapic(dev);

	pch_enable_serial_irqs(dev);

	/* Setup the PIRQ. */
	pch_pirq_init(dev);

	/* Setup power options. */
	pch_power_options(dev);

	/* Initialize power management */
	if (pch_is_lp()) {
		lpt_lp_pm_init(dev);
		enable_lp_clock_gating(dev);
	} else {
		lpt_pm_init(dev);
		enable_clock_gating(dev);
	}

	/* Initialize the real time clock. */
	pch_rtc_init(dev);

	/* Initialize ISA DMA. */
	isa_dma_init();

	/* Initialize the High Precision Event Timers, if present. */
	enable_hpet();

	setup_i8259();

	/* Interrupt 9 should be level triggered (SCI) */
	i8259_configure_irq_trigger(9, 1);

	pch_disable_smm_only_flashing(dev);

	pch_set_acpi_mode();

	pch_fixups(dev);
}

static void pch_lpc_add_mmio_resources(device_t dev)
{
	u32 reg;
	struct resource *res;
	const u32 default_decode_base = IO_APIC_ADDR;

	/*
	 * Just report all resources from IO-APIC base to 4GiB. Don't mark
	 * them reserved as that may upset the OS if this range is marked
	 * as reserved in the e820.
	 */
	res = new_resource(dev, OIC);
	res->base = default_decode_base;
	res->size = 0 - default_decode_base;
	res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;

	/* RCBA */
	if (DEFAULT_RCBA < default_decode_base) {
		res = new_resource(dev, RCBA);
		res->base = DEFAULT_RCBA;
		res->size = 16 * 1024;
		res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED |
		             IORESOURCE_FIXED | IORESOURCE_RESERVE;
	}

	/* Check LPC Memory Decode register. */
	reg = pci_read_config32(dev, LGMR);
	if (reg & 1) {
		reg &= ~0xffff;
		if (reg < default_decode_base) {
			res = new_resource(dev, LGMR);
			res->base = reg;
			res->size = 16 * 1024;
			res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED |
			             IORESOURCE_FIXED | IORESOURCE_RESERVE;
		}
	}
}

/* Default IO range claimed by the LPC device. The upper bound is exclusive. */
#define LPC_DEFAULT_IO_RANGE_LOWER 0
#define LPC_DEFAULT_IO_RANGE_UPPER 0x1000

static inline int pch_io_range_in_default(u16 base, u16 size)
{
	/* Does it start above the range? */
	if (base >= LPC_DEFAULT_IO_RANGE_UPPER)
		return 0;

	/* Is it entirely contained? */
	if (base >= LPC_DEFAULT_IO_RANGE_LOWER &&
	    (base + size) < LPC_DEFAULT_IO_RANGE_UPPER)
		return 1;

	/* This will return not in range for partial overlaps. */
	return 0;
}

/*
 * Note: this function assumes there is no overlap with the default LPC device's
 * claimed range: LPC_DEFAULT_IO_RANGE_LOWER -> LPC_DEFAULT_IO_RANGE_UPPER.
 */
static void pch_lpc_add_io_resource(device_t dev, u16 base, u16 size, int index)
{
	struct resource *res;

	if (pch_io_range_in_default(base, size))
		return;

	res = new_resource(dev, index);
	res->base = base;
	res->size = size;
	res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}

static void pch_lpc_add_gen_io_resources(device_t dev, int reg_value, int index)
{
	/*
	 * Check if the register is enabled. If so and the base exceeds the
	 * device's deafult claim range add the resoure.
	 */
	if (reg_value & 1) {
		u16 base = reg_value & 0xfffc;
		u16 size = (0x3 | ((reg_value >> 16) & 0xfc)) + 1;
		pch_lpc_add_io_resource(dev, base, size, index);
	}
}

static void pch_lpc_add_io_resources(device_t dev)
{
	struct resource *res;
	config_t *config = dev->chip_info;

	/* Add the default claimed IO range for the LPC device. */
	res = new_resource(dev, 0);
	res->base = LPC_DEFAULT_IO_RANGE_LOWER;
	res->size = LPC_DEFAULT_IO_RANGE_UPPER - LPC_DEFAULT_IO_RANGE_LOWER;
	res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;

	/* GPIOBASE */
	pch_lpc_add_io_resource(dev, get_gpiobase(), DEFAULT_GPIOSIZE,
	                        GPIO_BASE);

	/* PMBASE */
	pch_lpc_add_io_resource(dev, get_pmbase(), 256, PMBASE);

	/* LPC Generic IO Decode range. */
	pch_lpc_add_gen_io_resources(dev, config->gen1_dec, LPC_GEN1_DEC);
	pch_lpc_add_gen_io_resources(dev, config->gen2_dec, LPC_GEN2_DEC);
	pch_lpc_add_gen_io_resources(dev, config->gen3_dec, LPC_GEN3_DEC);
	pch_lpc_add_gen_io_resources(dev, config->gen4_dec, LPC_GEN4_DEC);
}

static void pch_lpc_read_resources(device_t dev)
{
	global_nvs_t *gnvs;

	/* Get the normal PCI resources of this device. */
	pci_dev_read_resources(dev);

	/* Add non-standard MMIO resources. */
	pch_lpc_add_mmio_resources(dev);

	/* Add IO resources. */
	pch_lpc_add_io_resources(dev);

	/* Allocate ACPI NVS in CBMEM */
	gnvs = cbmem_add(CBMEM_ID_ACPI_GNVS, sizeof(global_nvs_t));
	if (gnvs)
		memset(gnvs, 0, sizeof(global_nvs_t));
}

static void pch_lpc_enable(device_t dev)
{
	/* Enable PCH Display Port */
	RCBA16(DISPBDF) = 0x0010;
	RCBA32_OR(FD2, PCH_ENABLE_DBDF);

	pch_enable(dev);
}

static void set_subsystem(device_t dev, unsigned vendor, unsigned device)
{
	if (!vendor || !device) {
		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
				pci_read_config32(dev, PCI_VENDOR_ID));
	} else {
		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
				((device & 0xffff) << 16) | (vendor & 0xffff));
	}
}

static struct pci_operations pci_ops = {
	.set_subsystem = set_subsystem,
};

static struct device_operations device_ops = {
	.read_resources		= pch_lpc_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= pci_dev_enable_resources,
	.init			= lpc_init,
	.enable			= pch_lpc_enable,
	.scan_bus		= scan_static_bus,
	.ops_pci		= &pci_ops,
};


/* IDs for LPC device of Intel 8 Series Chipset (Lynx Point) */
static const unsigned short pci_device_ids[] = {
	0x8c41, /* Mobile Full Featured Engineering Sample. */
	0x8c42, /* Desktop Full Featured Engineering Sample. */
	0x8c44, /* Z87 SKU */
	0x8c46, /* Z85 SKU */
	0x8c49, /* HM86 SKU */
	0x8c4a, /* H87 SKU */
	0x8c4b, /* HM87 SKU */
	0x8c4c, /* Q85 SKU */
	0x8c4e, /* Q87 SKU */
	0x8c4f, /* QM87 SKU */
	0x9c41, /* LP Full Featured Engineering Sample */
	0x9c43, /* LP Premium SKU */
	0x9c45, /* LP Mainstream SKU */
	0x9c47, /* LP Value SKU */
	0 };

static const struct pci_driver pch_lpc __pci_driver = {
	.ops	 = &device_ops,
	.vendor	 = PCI_VENDOR_ID_INTEL,
	.devices = pci_device_ids,
};