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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/io.h>
#include <commonlib/region.h>
#include <console/console.h>
#include <cpu/intel/em64t101_save_state.h>
#include <cpu/intel/model_206ax/model_206ax.h>
#include <cpu/x86/smm.h>
#include <device/mmio.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <northbridge/intel/sandybridge/sandybridge.h>
#include <soc/nvs.h>
#include <southbridge/intel/bd82x6x/me.h>
#include <southbridge/intel/common/finalize.h>
#include <southbridge/intel/common/gpio.h>
#include <southbridge/intel/common/pmutil.h>
#include <types.h>
#include "pch.h"
int southbridge_io_trap_handler(int smif)
{
switch (smif) {
case 0x32:
printk(BIOS_DEBUG, "OS Init\n");
/* gnvs->smif:
* On success, the IO Trap Handler returns 0
* On failure, the IO Trap Handler returns a value != 0
*/
gnvs->smif = 0;
return 1; /* IO trap handled */
}
/* Not handled */
return 0;
}
static void southbridge_gate_memory_reset_real(int offset,
u16 use, u16 io, u16 lvl)
{
u32 reg32;
/* Make sure it is set as GPIO */
reg32 = inl(use);
if (!(reg32 & (1 << offset))) {
reg32 |= (1 << offset);
outl(reg32, use);
}
/* Make sure it is set as output */
reg32 = inl(io);
if (reg32 & (1 << offset)) {
reg32 &= ~(1 << offset);
outl(reg32, io);
}
/* Drive the output low */
reg32 = inl(lvl);
reg32 &= ~(1 << offset);
outl(reg32, lvl);
}
/*
* Drive GPIO 60 low to gate memory reset in S3.
*
* Intel reference designs all use GPIO 60 but it is
* not a requirement and boards could use a different pin.
*/
void southbridge_gate_memory_reset(void)
{
u16 gpiobase;
gpiobase = pci_read_config16(PCH_LPC_DEV, GPIOBASE) & 0xfffc;
if (!gpiobase)
return;
if (CONFIG_DRAM_RESET_GATE_GPIO >= 32)
southbridge_gate_memory_reset_real(CONFIG_DRAM_RESET_GATE_GPIO - 32,
gpiobase + GPIO_USE_SEL2,
gpiobase + GP_IO_SEL2,
gpiobase + GP_LVL2);
else
southbridge_gate_memory_reset_real(CONFIG_DRAM_RESET_GATE_GPIO,
gpiobase + GPIO_USE_SEL,
gpiobase + GP_IO_SEL,
gpiobase + GP_LVL);
}
void southbridge_smi_monitor(void)
{
#define IOTRAP(x) (trap_sts & (1 << x))
u32 trap_sts, trap_cycle;
u32 data, mask = 0;
int i;
trap_sts = RCBA32(0x1e00); // TRSR - Trap Status Register
RCBA32(0x1e00) = trap_sts; // Clear trap(s) in TRSR
trap_cycle = RCBA32(0x1e10);
for (i=16; i<20; i++) {
if (trap_cycle & (1 << i))
mask |= (0xff << ((i - 16) << 3));
}
/* IOTRAP(3) SMI function call */
if (IOTRAP(3)) {
if (gnvs && gnvs->smif)
io_trap_handler(gnvs->smif); // call function smif
return;
}
/* IOTRAP(2) currently unused
* IOTRAP(1) currently unused */
/* IOTRAP(0) SMIC */
if (IOTRAP(0)) {
if (!(trap_cycle & (1 << 24))) { // It's a write
printk(BIOS_DEBUG, "SMI1 command\n");
data = RCBA32(0x1e18);
data &= mask;
// if (smi1)
// southbridge_smi_command(data);
// return;
}
// Fall through to debug
}
printk(BIOS_DEBUG, " trapped io address = 0x%x\n", trap_cycle & 0xfffc);
for (i=0; i < 4; i++) if (IOTRAP(i)) printk(BIOS_DEBUG, " TRAP = %d\n", i);
printk(BIOS_DEBUG, " AHBE = %x\n", (trap_cycle >> 16) & 0xf);
printk(BIOS_DEBUG, " MASK = 0x%08x\n", mask);
printk(BIOS_DEBUG, " read/write: %s\n", (trap_cycle & (1 << 24)) ? "read" : "write");
if (!(trap_cycle & (1 << 24))) {
/* Write Cycle */
data = RCBA32(0x1e18);
printk(BIOS_DEBUG, " iotrap written data = 0x%08x\n", data);
}
#undef IOTRAP
}
/*
* PCH BIOS Spec Rev 0.7.0, Section 13.5
* Additional xHCI Controller Configurations Prior to Entering S3/S4
*/
static void xhci_a0_suspend_smm_workaround(void)
{
/* Workaround only applies to Panther Point stepping A0 */
if (pch_silicon_revision() != PCH_STEP_A0)
return;
/* The BAR is 64-bit, account for it being above 4 GiB */
if (pci_read_config32(PCH_XHCI_DEV, PCI_BASE_ADDRESS_0 + 4))
return;
/* PCH datasheet indicates that only the upper 16 bits are valid */
uintptr_t xhci_bar = pci_read_config32(PCH_XHCI_DEV, PCI_BASE_ADDRESS_0) &
~PCI_BASE_ADDRESS_MEM_ATTR_MASK;
if (smm_points_to_smram((void *)xhci_bar, 64 * KiB))
return;
/* Step 1: Set power state to D0 */
pci_and_config16(PCH_XHCI_DEV, XHCI_PWR_CNTL_STS, ~(3 << 0));
/* Step 2 */
pci_or_config16(PCH_XHCI_DEV, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
/* Steps 3 to 6: If USB3 PORTSC current connect status (bit 0) is set, do IOBP magic */
for (unsigned int port = 0; port < 4; port++) {
if (read32p((xhci_bar + XHCI_PORTSC_x_USB3(port))) & (1 << 0))
pch_iobp_update(0xec000082 + 0x100 * port, ~0, 3 << 2);
}
/* Step 7 */
pci_and_config16(PCH_XHCI_DEV, PCI_COMMAND, ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY));
/* Step 8: Set power state to D3 */
pci_or_config16(PCH_XHCI_DEV, XHCI_PWR_CNTL_STS, 3 << 0);
}
void southbridge_smm_xhci_sleep(u8 slp_type)
{
/* Only Panther Point has xHCI */
if (pch_silicon_type() != PCH_TYPE_PPT)
return;
/* Verify that RCBA is still valid */
if (pci_read_config32(PCH_LPC_DEV, RCBA) != (CONFIG_FIXED_RCBA_MMIO_BASE | RCBA_ENABLE))
return;
if (RCBA32(FD) & PCH_DISABLE_XHCI)
return;
switch (slp_type) {
case ACPI_S3:
case ACPI_S4:
xhci_a0_suspend_smm_workaround();
break;
case ACPI_S5:
/*
* PCH BIOS Spec Rev 0.7.0, Section 13.5
* Additional xHCI Controller Configurations Prior to Entering S5
*
* For all steppings:
* Step 1: Set power state to D3 (bits 1:0)
* Step 2: Set PME# enable bit (bit 8)
*/
pci_or_config16(PCH_XHCI_DEV, XHCI_PWR_CNTL_STS, 1 << 8 | 3 << 0);
break;
}
}
void southbridge_finalize_all(void)
{
intel_me_finalize_smm();
intel_pch_finalize_smm();
intel_sandybridge_finalize_smm();
intel_model_206ax_finalize_smm();
}
|
