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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 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.
*/
#include <stddef.h>
#include <arch/io.h>
#include <arch/romstage.h>
#include <device/mmio.h>
#include <device/pci_ops.h>
#include <console/console.h>
#include <cbmem.h>
#if CONFIG(EC_GOOGLE_CHROMEEC)
#include <ec/google/chromeec/ec.h>
#endif
#include <elog.h>
#include <romstage_handoff.h>
#include <string.h>
#include <timestamp.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include <soc/gpio.h>
#include <soc/iomap.h>
#include <soc/lpc.h>
#include <soc/msr.h>
#include <soc/pci_devs.h>
#include <soc/pmc.h>
#include <soc/romstage.h>
#include <soc/spi.h>
static void program_base_addresses(void)
{
uint32_t reg;
const uint32_t lpc_dev = PCI_DEV(0, LPC_DEV, LPC_FUNC);
/* Memory Mapped IO registers. */
reg = PMC_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, PBASE, reg);
reg = IO_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, IOBASE, reg);
reg = ILB_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, IBASE, reg);
reg = SPI_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, SBASE, reg);
reg = MPHY_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, MPBASE, reg);
reg = PUNIT_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, PUBASE, reg);
reg = RCBA_BASE_ADDRESS | 1;
pci_write_config32(lpc_dev, RCBA, reg);
/* IO Port Registers. */
reg = ACPI_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, ABASE, reg);
reg = GPIO_BASE_ADDRESS | 2;
pci_write_config32(lpc_dev, GBASE, reg);
}
static void spi_init(void)
{
u32 *scs = (u32 *)(SPI_BASE_ADDRESS + SCS);
u32 *bcr = (u32 *)(SPI_BASE_ADDRESS + BCR);
uint32_t reg;
/* Disable generating SMI when setting WPD bit. */
write32(scs, read32(scs) & ~SMIWPEN);
/*
* Enable caching and prefetching in the SPI controller. Disable
* the SMM-only BIOS write and set WPD bit.
*/
reg = (read32(bcr) & ~SRC_MASK) | SRC_CACHE_PREFETCH | BCR_WPD;
reg &= ~EISS;
write32(bcr, reg);
}
static struct chipset_power_state power_state;
static void migrate_power_state(int is_recovery)
{
struct chipset_power_state *ps_cbmem;
struct chipset_power_state *ps_car;
ps_car = &power_state;
ps_cbmem = cbmem_add(CBMEM_ID_POWER_STATE, sizeof(*ps_cbmem));
if (ps_cbmem == NULL) {
printk(BIOS_DEBUG, "Not adding power state to cbmem!\n");
return;
}
memcpy(ps_cbmem, ps_car, sizeof(*ps_cbmem));
}
ROMSTAGE_CBMEM_INIT_HOOK(migrate_power_state)
static struct chipset_power_state *fill_power_state(void)
{
struct chipset_power_state *ps = &power_state;
ps->pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS);
ps->pm1_en = inw(ACPI_BASE_ADDRESS + PM1_EN);
ps->pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
ps->gpe0_sts = inl(ACPI_BASE_ADDRESS + GPE0_STS);
ps->gpe0_en = inl(ACPI_BASE_ADDRESS + GPE0_EN);
ps->tco_sts = inl(ACPI_BASE_ADDRESS + TCO_STS);
ps->prsts = read32((u32 *)(PMC_BASE_ADDRESS + PRSTS));
ps->gen_pmcon1 = read32((u32 *)(PMC_BASE_ADDRESS + GEN_PMCON1));
ps->gen_pmcon2 = read32((u32 *)(PMC_BASE_ADDRESS + GEN_PMCON2));
printk(BIOS_DEBUG, "pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n",
ps->pm1_sts, ps->pm1_en, ps->pm1_cnt);
printk(BIOS_DEBUG, "gpe0_sts: %08x gpe0_en: %08x tco_sts: %08x\n",
ps->gpe0_sts, ps->gpe0_en, ps->tco_sts);
printk(BIOS_DEBUG, "prsts: %08x gen_pmcon1: %08x gen_pmcon2: %08x\n",
ps->prsts, ps->gen_pmcon1, ps->gen_pmcon2);
return ps;
}
/* Return 0, 3, or 5 to indicate the previous sleep state. */
static int chipset_prev_sleep_state(struct chipset_power_state *ps)
{
/* Default to S0. */
int prev_sleep_state = ACPI_S0;
if (ps->pm1_sts & WAK_STS) {
switch (acpi_sleep_from_pm1(ps->pm1_cnt)) {
case ACPI_S3:
if (CONFIG(HAVE_ACPI_RESUME))
prev_sleep_state = ACPI_S3;
break;
case ACPI_S5:
prev_sleep_state = ACPI_S5;
break;
}
/* Clear SLP_TYP. */
outl(ps->pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT);
}
if (ps->gen_pmcon1 & (PWR_FLR | SUS_PWR_FLR)) {
prev_sleep_state = ACPI_S5;
}
return prev_sleep_state;
}
/* Entry from cpu/intel/car/romstage.c */
void mainboard_romstage_entry(void)
{
struct chipset_power_state *ps;
int prev_sleep_state;
struct mrc_params mp;
program_base_addresses();
tco_disable();
if (CONFIG(ENABLE_BUILTIN_COM1))
byt_config_com1_and_enable();
console_init();
spi_init();
set_max_freq();
punit_init();
gfx_init();
memset(&mp, 0, sizeof(mp));
mainboard_fill_mrc_params(&mp);
timestamp_add_now(TS_BEFORE_INITRAM);
ps = fill_power_state();
prev_sleep_state = chipset_prev_sleep_state(ps);
printk(BIOS_DEBUG, "prev_sleep_state = S%d\n", prev_sleep_state);
elog_boot_notify(prev_sleep_state == ACPI_S3);
/* Initialize RAM */
raminit(&mp, prev_sleep_state);
timestamp_add_now(TS_AFTER_INITRAM);
romstage_handoff_init(prev_sleep_state == ACPI_S3);
}
|
