blob: dcf3ed192dedd5795bc73afe51462f702357080c (
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
|
# Squared
## Overview
### Top
![][overview_top]
### Bottom
![][overview_bottom]
## Mainboard components
### Platform
```eval_rst
+------------------+----------------------------------+
| CPU | Intel Atom, Celeron, Pentium |
+------------------+----------------------------------+
| PCH | Intel Apollo Lake |
+------------------+----------------------------------+
| EC / Super IO | N/A |
+------------------+----------------------------------+
| Coprocessor | Intel TXE 3.0 |
+------------------+----------------------------------+
```
### Flash chip
```eval_rst
+---------------------+------------+
| Type | Value |
+=====================+============+
| Socketed flash | no |
+---------------------+------------+
| Vendor | Winbond |
+---------------------+------------+
| Model | W25Q128FW |
+---------------------+------------+
| Voltage | 1.8V |
+---------------------+------------+
| Size | 16 MiB |
+---------------------+------------+
| Package | SOIC-8 |
+---------------------+------------+
| Write protection | No |
+---------------------+------------+
| Internal flashing | No |
+---------------------+------------+
| In curcuit flashing | Yes |
+---------------------+------------+
```
## Board status
### Working
- bootblock, romstage, ramstage
- Serial console UART0, UART1
- SPI flash console
- iGPU init with libgfxinit
- LAN1, LAN2
- USB2, USB3
- HDMI, DisplayPort
- eMMC
- flashing with flashrom externally
### Work in progress
- Documentation
- ACPI
### Not working / Known issues
- Generally SeaBIOS works, but it can't find the CBFS region and therefore it can't load seavgabios. This is because of changes at the Apollolake platform.
### Untested
- GPIO pin header
- 60 pin EXHAT
- Camera interface
- MIPI-CSI2 2-lane (2MP)
- MIPI-CSI2 4-lane (8MP)
- SATA3
- USB3 OTG
- embedded DisplayPort
- M.2 slot
- mini PCIe
- flashing with flashrom internally using Linux
## Building and flashing coreboot
### Building
```bash
make distclean
touch .config
./util/scripts/config --enable VENDOR_UP
./util/scripts/config --enable BOARD_UP_SQUARED
./util/scripts/config --enable NEED_IFWI
./util/scripts/config --enable HAVE_IFD_BIN
./util/scripts/config --set-str IFWI_FILE_NAME "<path_to_your_bios_region>"
./util/scripts/config --set-str IFD_BIN_PATH "<path_to_your_ifd_region>"
make olddefconfig
```
### Flashing
[overview_top]: top.jpg
[overview_bottom]: bottom.jpg
|
