summaryrefslogtreecommitdiff
path: root/src/soc/intel/apollolake/chip.c
blob: a24ca33530470c514a73fa89629fea31bfb5c374 (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
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2015 Intel Corp.
 * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
 * (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 */

#include <arch/acpi.h>
#include <bootstate.h>
#include <cbmem.h>
#include <console/console.h>
#include <cpu/cpu.h>
#include <cpu/x86/mp.h>
#include <device/device.h>
#include <device/pci.h>
#include <fsp/api.h>
#include <fsp/util.h>
#include <romstage_handoff.h>
#include <soc/iomap.h>
#include <soc/cpu.h>
#include <soc/flash_ctrlr.h>
#include <soc/intel/common/vbt.h>
#include <soc/itss.h>
#include <soc/nvs.h>
#include <soc/pci_devs.h>
#include <spi-generic.h>
#include <soc/pm.h>
#include <soc/p2sb.h>
#include <soc/northbridge.h>

#include "chip.h"

static void *vbt;
static struct region_device vbt_rdev;

static const char *soc_acpi_name(struct device *dev)
{
	if (dev->path.type == DEVICE_PATH_DOMAIN)
		return "PCI0";

	if (dev->path.type != DEVICE_PATH_PCI)
		return NULL;

	switch (dev->path.pci.devfn) {
	/* DSDT: acpi/northbridge.asl */
	case NB_DEVFN:
		return "MCHC";
	/* DSDT: acpi/lpc.asl */
	case LPC_DEVFN:
		return "LPCB";
	/* DSDT: acpi/xhci.asl */
	case XHCI_DEVFN:
		return "XHCI";
	/* DSDT: acpi/pch_hda.asl */
	case HDA_DEVFN:
		return "HDAS";
	/* DSDT: acpi/lpss.asl */
	case LPSS_DEVFN_UART0:
		return "URT1";
	case LPSS_DEVFN_UART1:
		return "URT2";
	case LPSS_DEVFN_UART2:
		return "URT3";
	case LPSS_DEVFN_UART3:
		return "URT4";
	case LPSS_DEVFN_SPI0:
		return "SPI1";
	case LPSS_DEVFN_SPI1:
		return "SPI2";
	case LPSS_DEVFN_SPI2:
		return "SPI3";
	case LPSS_DEVFN_PWM:
		return "PWM";
	case LPSS_DEVFN_I2C0:
		return "I2C0";
	case LPSS_DEVFN_I2C1:
		return "I2C1";
	case LPSS_DEVFN_I2C2:
		return "I2C2";
	case LPSS_DEVFN_I2C3:
		return "I2C3";
	case LPSS_DEVFN_I2C4:
		return "I2C4";
	case LPSS_DEVFN_I2C5:
		return "I2C5";
	case LPSS_DEVFN_I2C6:
		return "I2C6";
	case LPSS_DEVFN_I2C7:
		return "I2C7";
	/* Storage */
	case SDCARD_DEVFN:
		return "SDCD";
	case EMMC_DEVFN:
		return "EMMC";
	case SDIO_DEVFN:
		return "SDIO";
	/* PCIe */
	case PCIEB0_DEVFN:
		return "RP01";
	}

	return NULL;
}

static void pci_domain_set_resources(device_t dev)
{
       assign_resources(dev->link_list);
}

static struct device_operations pci_domain_ops = {
	.read_resources = pci_domain_read_resources,
	.set_resources = pci_domain_set_resources,
	.enable_resources = NULL,
	.init = NULL,
	.scan_bus = pci_domain_scan_bus,
	.ops_pci_bus = pci_bus_default_ops,
	.acpi_name = &soc_acpi_name,
};

static struct device_operations cpu_bus_ops = {
	.read_resources = DEVICE_NOOP,
	.set_resources = DEVICE_NOOP,
	.enable_resources = DEVICE_NOOP,
	.init = apollolake_init_cpus,
	.scan_bus = NULL,
	.acpi_fill_ssdt_generator = generate_cpu_entries,
};

static void enable_dev(device_t dev)
{
	/* Set the operations if it is a special bus type */
	if (dev->path.type == DEVICE_PATH_DOMAIN) {
		dev->ops = &pci_domain_ops;
	} else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) {
		dev->ops = &cpu_bus_ops;
	}
}

/*
 * If the PCIe root port at function 0 is disabled,
 * the PCIe root ports might be coalesced after FSP silicon init.
 * The below function will swap the devfn of the first enabled device
 * in devicetree and function 0 resides a pci device
 * so that it won't confuse coreboot.
 */
static void pcie_update_device_tree(unsigned int devfn0, int num_funcs)
{
	device_t func0;
	unsigned int devfn;
	int i;
	unsigned int inc = PCI_DEVFN(0, 1);

	func0 = dev_find_slot(0, devfn0);
	if (func0 == NULL)
		return;

	/* No more functions if function 0 is disabled. */
	if (pci_read_config32(func0, PCI_VENDOR_ID) == 0xffffffff)
		return;

	devfn = devfn0 + inc;

	/*
	 * Increase funtion by 1.
	 * Then find first enabled device to replace func0
	 * as that port was move to func0.
	 */
	for (i = 1; i < num_funcs; i++, devfn += inc) {
		device_t dev = dev_find_slot(0, devfn);
		if (dev == NULL)
			continue;

		if (!dev->enabled)
			continue;
		/* Found the first enabled device in given dev number */
		func0->path.pci.devfn = dev->path.pci.devfn;
		dev->path.pci.devfn = devfn0;
		break;
	}
}

static void pcie_override_devicetree_after_silicon_init(void)
{
	pcie_update_device_tree(PCIEA0_DEVFN, 4);
	pcie_update_device_tree(PCIEB0_DEVFN, 2);
}

/* Configure package power limits */
static void set_power_limits(void)
{
	static struct soc_intel_apollolake_config *cfg;
	struct device *dev = NB_DEV_ROOT;
	msr_t rapl_msr_reg, limit;
	uint32_t power_unit;
	uint32_t tdp, min_power, max_power;
	uint32_t pl2_val;
	uint32_t *rapl_mmio_reg;

	if (!dev || !dev->chip_info) {
		printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
		return;
	}

	cfg = dev->chip_info;

	/* Get units */
	rapl_msr_reg = rdmsr(MSR_PKG_POWER_SKU_UNIT);
	power_unit = 1 << (rapl_msr_reg.lo & 0xf);

	/* Get power defaults for this SKU */
	rapl_msr_reg = rdmsr(MSR_PKG_POWER_SKU);
	tdp = rapl_msr_reg.lo & PKG_POWER_LIMIT_MASK;
	pl2_val = rapl_msr_reg.hi & PKG_POWER_LIMIT_MASK;
	min_power = (rapl_msr_reg.lo >> 16) & PKG_POWER_LIMIT_MASK;
	max_power = rapl_msr_reg.hi & PKG_POWER_LIMIT_MASK;

	if (min_power > 0 && tdp < min_power)
		tdp = min_power;

	if (max_power > 0 && tdp > max_power)
		tdp = max_power;

	/* Set PL1 override value */
	tdp = (cfg->tdp_pl1_override_mw == 0) ?
		tdp : (cfg->tdp_pl1_override_mw * power_unit) / 1000;
	/* Set PL2 override value */
	pl2_val = (cfg->tdp_pl2_override_mw == 0) ?
		pl2_val : (cfg->tdp_pl2_override_mw * power_unit) / 1000;

	/* Set long term power limit to TDP */
	limit.lo = tdp & PKG_POWER_LIMIT_MASK;
	/* Set PL1 Pkg Power clamp bit */
	limit.lo |= PKG_POWER_LIMIT_CLAMP;

	limit.lo |= PKG_POWER_LIMIT_EN;
	limit.lo |= (MB_POWER_LIMIT1_TIME_DEFAULT &
		PKG_POWER_LIMIT_TIME_MASK) << PKG_POWER_LIMIT_TIME_SHIFT;

	/* Set short term power limit PL2 */
	limit.hi = pl2_val & PKG_POWER_LIMIT_MASK;
	limit.hi |= PKG_POWER_LIMIT_EN;

	/* Program package power limits in RAPL MSR */
	wrmsr(MSR_PKG_POWER_LIMIT, limit);
	printk(BIOS_INFO, "RAPL PL1 %d.%dW\n", tdp / power_unit,
				100 * (tdp % power_unit) / power_unit);
	printk(BIOS_INFO, "RAPL PL2 %d.%dW\n", pl2_val / power_unit,
				100 * (pl2_val % power_unit) / power_unit);

	/* Get the MMIO address */
	rapl_mmio_reg = (void *)(uintptr_t) (MCH_BASE_ADDR + MCHBAR_RAPL_PPL);

	/* Setting RAPL MMIO register for Power limits.
	* RAPL driver is using MSR instead of MMIO.
	* So, disabled LIMIT_EN bit for MMIO. */
	write32(rapl_mmio_reg, limit.lo & ~(PKG_POWER_LIMIT_EN));
	write32(rapl_mmio_reg + 1, limit.hi & ~(PKG_POWER_LIMIT_EN));
}

static void soc_init(void *data)
{
	struct global_nvs_t *gnvs;

	/* Save VBT info and mapping */
	vbt = vbt_get(&vbt_rdev);

	/* Snapshot the current GPIO IRQ polarities. FSP is setting a
	 * default policy that doesn't honor boards' requirements. */
	itss_snapshot_irq_polarities(GPIO_IRQ_START, GPIO_IRQ_END);

	fsp_silicon_init(romstage_handoff_is_resume());

	/* Restore GPIO IRQ polarities back to previous settings. */
	itss_restore_irq_polarities(GPIO_IRQ_START, GPIO_IRQ_END);

	/* override 'enabled' setting in device tree if needed */
	pcie_override_devicetree_after_silicon_init();

	/*
	 * Keep the P2SB device visible so it and the other devices are
	 * visible in coreboot for driver support and PCI resource allocation.
	 * There is a UPD setting for this, but it's more consistent to use
	 * hide and unhide symmetrically.
	 */
	p2sb_unhide();

	/* Allocate ACPI NVS in CBMEM */
	gnvs = cbmem_add(CBMEM_ID_ACPI_GNVS, sizeof(*gnvs));

	/* Set RAPL MSR for Package power limits*/
	set_power_limits();
}

static void soc_final(void *data)
{
	if (vbt)
		rdev_munmap(&vbt_rdev, vbt);

	/* Disable global reset, just in case */
	global_reset_enable(0);
	/* Make sure payload/OS can't trigger global reset */
	global_reset_lock();
}

static void disable_dev(struct device *dev, FSP_S_CONFIG *silconfig) {

	switch (dev->path.pci.devfn) {
	case ISH_DEVFN:
		silconfig->IshEnable = 0;
		break;
	case SATA_DEVFN:
		silconfig->EnableSata = 0;
		break;
	case PCIEB0_DEVFN:
		silconfig->PcieRootPortEn[0] = 0;
		silconfig->PcieRpHotPlug[0] = 0;
		break;
	case PCIEB1_DEVFN:
		silconfig->PcieRootPortEn[1] = 0;
		silconfig->PcieRpHotPlug[1] = 0;
		break;
	case PCIEA0_DEVFN:
		silconfig->PcieRootPortEn[2] = 0;
		silconfig->PcieRpHotPlug[2] = 0;
		break;
	case PCIEA1_DEVFN:
		silconfig->PcieRootPortEn[3] = 0;
		silconfig->PcieRpHotPlug[3] = 0;
		break;
	case PCIEA2_DEVFN:
		silconfig->PcieRootPortEn[4] = 0;
		silconfig->PcieRpHotPlug[4] = 0;
		break;
	case PCIEA3_DEVFN:
		silconfig->PcieRootPortEn[5] = 0;
		silconfig->PcieRpHotPlug[5] = 0;
		break;
	case XHCI_DEVFN:
		silconfig->Usb30Mode = 0;
		break;
	case XDCI_DEVFN:
		silconfig->UsbOtg = 0;
		break;
	case LPSS_DEVFN_I2C0:
		silconfig->I2c0Enable = 0;
		break;
	case LPSS_DEVFN_I2C1:
		silconfig->I2c1Enable = 0;
		break;
	case LPSS_DEVFN_I2C2:
		silconfig->I2c2Enable = 0;
		break;
	case LPSS_DEVFN_I2C3:
		silconfig->I2c3Enable = 0;
		break;
	case LPSS_DEVFN_I2C4:
		silconfig->I2c4Enable = 0;
		break;
	case LPSS_DEVFN_I2C5:
		silconfig->I2c5Enable = 0;
		break;
	case LPSS_DEVFN_I2C6:
		silconfig->I2c6Enable = 0;
		break;
	case LPSS_DEVFN_I2C7:
		silconfig->I2c7Enable = 0;
		break;
	case LPSS_DEVFN_UART0:
		silconfig->Hsuart0Enable = 0;
		break;
	case LPSS_DEVFN_UART1:
		silconfig->Hsuart1Enable = 0;
		break;
	case LPSS_DEVFN_UART2:
		silconfig->Hsuart2Enable = 0;
		break;
	case LPSS_DEVFN_UART3:
		silconfig->Hsuart3Enable = 0;
		break;
	case LPSS_DEVFN_SPI0:
		silconfig->Spi0Enable = 0;
		break;
	case LPSS_DEVFN_SPI1:
		silconfig->Spi1Enable = 0;
		break;
	case LPSS_DEVFN_SPI2:
		silconfig->Spi2Enable = 0;
		break;
	case SDCARD_DEVFN:
		silconfig->SdcardEnabled = 0;
		break;
	case EMMC_DEVFN:
		silconfig->eMMCEnabled = 0;
		break;
	case SDIO_DEVFN:
		silconfig->SdioEnabled = 0;
		break;
	case SMBUS_DEVFN:
		silconfig->SmbusEnable = 0;
		break;
	default:
		printk(BIOS_WARNING, "PCI:%02x.%01x: Could not disable the device\n",
			PCI_SLOT(dev->path.pci.devfn),
			PCI_FUNC(dev->path.pci.devfn));
		break;
	}
}

static void parse_devicetree(FSP_S_CONFIG *silconfig)
{
	struct device *dev = NB_DEV_ROOT;

	if (!dev) {
		printk(BIOS_ERR, "Could not find root device\n");
		return;
	}
	/* Only disable bus 0 devices. */
	for (dev = dev->bus->children; dev; dev = dev->sibling) {
		if (!dev->enabled)
			disable_dev(dev, silconfig);
	}
}

void platform_fsp_silicon_init_params_cb(FSPS_UPD *silupd)
{
        FSP_S_CONFIG *silconfig = &silupd->FspsConfig;
	static struct soc_intel_apollolake_config *cfg;

	/* Load VBT before devicetree-specific config. */
	silconfig->GraphicsConfigPtr = (uintptr_t)vbt;

	struct device *dev = NB_DEV_ROOT;

	if (!dev || !dev->chip_info) {
		printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
		return;
	}

	cfg = dev->chip_info;

	/* Parse device tree and disable unused device*/
	parse_devicetree(silconfig);

	silconfig->PcieRpClkReqNumber[0] = cfg->pcie_rp0_clkreq_pin;
	silconfig->PcieRpClkReqNumber[1] = cfg->pcie_rp1_clkreq_pin;
	silconfig->PcieRpClkReqNumber[2] = cfg->pcie_rp2_clkreq_pin;
	silconfig->PcieRpClkReqNumber[3] = cfg->pcie_rp3_clkreq_pin;
	silconfig->PcieRpClkReqNumber[4] = cfg->pcie_rp4_clkreq_pin;
	silconfig->PcieRpClkReqNumber[5] = cfg->pcie_rp5_clkreq_pin;

	if (cfg->emmc_tx_cmd_cntl != 0)
		silconfig->EmmcTxCmdCntl = cfg->emmc_tx_cmd_cntl;
	if (cfg->emmc_tx_data_cntl1 != 0)
		silconfig->EmmcTxDataCntl1 = cfg->emmc_tx_data_cntl1;
	if (cfg->emmc_tx_data_cntl2 != 0)
		silconfig->EmmcTxDataCntl2 = cfg->emmc_tx_data_cntl2;
	if (cfg->emmc_rx_cmd_data_cntl1 != 0)
		silconfig->EmmcRxCmdDataCntl1 = cfg->emmc_rx_cmd_data_cntl1;
	if (cfg->emmc_rx_strobe_cntl != 0)
		silconfig->EmmcRxStrobeCntl = cfg->emmc_rx_strobe_cntl;
	if (cfg->emmc_rx_cmd_data_cntl2 != 0)
		silconfig->EmmcRxCmdDataCntl2 = cfg->emmc_rx_cmd_data_cntl2;

	silconfig->LPSS_S0ixEnable = cfg->lpss_s0ix_enable;

	/* Disable monitor mwait since it is broken due to a hardware bug without a fix */
	silconfig->MonitorMwaitEnable = 0;

	silconfig->SkipMpInit = 1;

	/* Disable setting of EISS bit in FSP. */
	silconfig->SpiEiss = 0;

	/* Disable FSP from locking access to the RTC NVRAM */
	silconfig->RtcLock = 0;

	/* Enable Audio clk gate and power gate */
	silconfig->HDAudioClkGate = cfg->hdaudio_clk_gate_enable;
	silconfig->HDAudioPwrGate = cfg->hdaudio_pwr_gate_enable;
	/* Bios config lockdown Audio clk and power gate */
	silconfig->BiosCfgLockDown = cfg->hdaudio_bios_config_lockdown;

}

struct chip_operations soc_intel_apollolake_ops = {
	CHIP_NAME("Intel Apollolake SOC")
	.enable_dev = &enable_dev,
	.init = &soc_init,
	.final = &soc_final
};

static void drop_privilege_all(void)
{
	/* Drop privilege level on all the CPUs */
	if (mp_run_on_all_cpus(&enable_untrusted_mode, 1000) < 0)
		printk(BIOS_ERR, "failed to enable untrusted mode\n");
}

void platform_fsp_notify_status(enum fsp_notify_phase phase)
{
	if (phase == END_OF_FIRMWARE) {
		/* Hide the P2SB device to align with previous behavior. */
		p2sb_hide();
		/*
		 * As per guidelines BIOS is recommended to drop CPU privilege
		 * level to IA_UNTRUSTED. After that certain device registers
		 * and MSRs become inaccessible supposedly increasing system
		 * security.
		 */
		drop_privilege_all();
	}
}

/*
 * spi_flash init() needs to run unconditionally on every boot (including
 * resume) to allow write protect to be disabled for eventlog and nvram
 * updates. This needs to be done as early as possible in ramstage. Thus, add a
 * callback for entry into BS_PRE_DEVICE.
 */
static void spi_flash_init_cb(void *unused)
{
	spi_flash_init();
}

BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, spi_flash_init_cb, NULL);