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mb/purism/librem_cnl: Add new variant 'Librem Mini v2' 

Add Kconfig entries, and update existing documentation to
accomodate both v1/v2 versions of the board.

Change-Id: I856bb914941211cfbec4fed871ba2a5a038e23c3
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46984
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Matt DeVillier 2020-11-02 17:19:53 -06:00 committed by Patrick Georgi
parent 22f028a3c7
commit 12d515dcc5
3 changed files with 33 additions and 19 deletions
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40
Documentation/mainboard/purism/librem_mini.md
View File

@ -1,16 +1,19 @@
# Purism Librem Mini
# Purism Librem Mini (v1, v2)
This page describes how to run coreboot on the [Purism Librem Mini].
```eval_rst
+------------------+--------------------------------------------------+
| CPU | Intel Core i7-8565U/8665U |
| CPU | Intel Core i7-8565U/8665U (v1) |
| | Intel Core i7-10510U (v2) |
+------------------+--------------------------------------------------+
| PCH | Whiskey Lake / Cannon Point LP |
| PCH | Whiskey Lake / Cannon Point LP (v1) |
| | Comet Lake LP Premium (Comet Lake-U) (v2) |
+------------------+--------------------------------------------------+
| Super I/O, EC | ITE IT8528E |
+------------------+--------------------------------------------------+
| Coprocessor | Intel Management Engine (CSME 12.x) |
| Coprocessor | Intel Management Engine (CSME 12.x) (v1) |
| | Intel Management Engine (CSME 14.x) (v2) |
+------------------+--------------------------------------------------+
```
@ -34,9 +37,9 @@ only the BIOS region is being modified).
+-----------------+---------------------------------+---------------------+
```
FSP-M and FSP-S are obtained after splitting the Coffee Lake FSP binary (done
automatically by the coreboot build system and included into the image) from
the `3rdparty/fsp` submodule.
FSP-M and FSP-S are obtained after splitting the FSP binary (done automatically
by the coreboot build system and included into the image; Coffee Lake for v1,
Comet Lake for v2) from the `3rdparty/fsp` submodule.
Microcode updates are automatically included into the coreboot image by the build
system from the `3rdparty/intel-microcode` submodule. Official Purism release
@ -50,12 +53,14 @@ the [purism-blobs] repository.
## Intel Management Engine
The Librem Mini uses version 12.x of the Intel Management Engine (ME) /
Converged Security Engine (CSE). The ME/CSE is disabled using the High
Assurance Platform (HAP) bit, which puts the ME into a disabled state
The Librem Mini uses version 12.x (v1) or 14.x (v2) of the Intel Management
Engine (ME) / Converged Security Engine (CSE). The ME/CSE is disabled using
the High Assurance Platform (HAP) bit, which puts the ME into a disabled state
after platform bring-up (BUP) and disables all PCI/HECI interfaces.
This can be verified via the coreboot cbmem utility:
`sudo ./cbmem -1 | grep 'ME:'`
`sudo ./cbmem -1 | grep 'ME:'`
provided coreboot has been modified to output the ME status even when
the PCI device is not visible/active (as it is in Purism's release builds).
@ -64,8 +69,9 @@ the PCI device is not visible/active (as it is in Purism's release builds).
### Internal programming
The main SPI flash can be accessed using [flashrom]. The first version
supporting the chipset is flashrom v1.2. Firmware an be easily flashed
with internal programmer (either BIOS region or full image).
supporting the chipset is flashrom v1.2 (v1.2-107-gb1f858f or later needed
for the Mini v2). Firmware an be easily flashed with internal programmer
(either BIOS region or full image).
### External programming
@ -100,17 +106,17 @@ desoldering it from the mainboard.
## Working
* External displays via HDMI/DisplayPort with VGA option ROM or FSP/GOP init
(no libgfxinit support yet)
* SeaBIOS (1.13.x), Tianocore (CorebootPayloadpkg), Heads (Purism downstream) payloads
(no libgfxinit support yet)
* SeaBIOS (1.14), Tianocore (CorebootPayloadPkg), Heads (Purism downstream) payloads
* Ethernet, m.2 2230 Wi-Fi
* System firmware updates via flashrom
* PCIe NVMe
* m.2 and SATA III
* Audio via front 3.5mm jack, HDMI, and DisplayPort
* SMBus (reading SPD from DIMMs)
* Initialization with CFL FSP 2.0
* Initialization with FSP 2.0 (CFL for v1, CML for v2)
* S3 Suspend/Resume
* Booting PureOS 9.x, Debian 10.x, Qubes 4.0.3, Linux Mint 19.3, Windows 10 2004
* Booting PureOS 10.x, Debian 11.x, Qubes 4.1.0-alpha1, Linux Mint 20, Windows 10 2004
## Not working / untested

7
src/mainboard/purism/librem_cnl/Kconfig
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@ -20,15 +20,16 @@ config MAINBOARD_DIR
config MAINBOARD_FAMILY
string
default "Librem Mini" if BOARD_PURISM_LIBREM_MINI
default "Librem Mini" if BOARD_PURISM_LIBREM_MINI || BOARD_PURISM_LIBREM_MINI_V2
config MAINBOARD_PART_NUMBER
string
default "Librem Mini" if BOARD_PURISM_LIBREM_MINI
default "Librem Mini v2" if BOARD_PURISM_LIBREM_MINI_V2
config VARIANT_DIR
string
default "librem_mini" if BOARD_PURISM_LIBREM_MINI
default "librem_mini" if BOARD_PURISM_LIBREM_MINI || BOARD_PURISM_LIBREM_MINI_V2
config DEVICETREE
string
@ -37,6 +38,7 @@ config DEVICETREE
config CBFS_SIZE
hex
default 0x800000 if BOARD_PURISM_LIBREM_MINI
default 0xA00000 if BOARD_PURISM_LIBREM_MINI_V2
config MAX_CPUS
int
@ -53,6 +55,7 @@ config DIMM_SPD_SIZE
config VGA_BIOS_ID
string
default "8086,3ea0" if BOARD_PURISM_LIBREM_MINI
default "8086,9b41" if BOARD_PURISM_LIBREM_MINI_V2
config PXE_ROM_ID
string

5
src/mainboard/purism/librem_cnl/Kconfig.name
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@ -2,3 +2,8 @@ config BOARD_PURISM_LIBREM_MINI
bool "Librem Mini"
select BOARD_PURISM_BASEBOARD_LIBREM_CNL
select SOC_INTEL_WHISKEYLAKE
config BOARD_PURISM_LIBREM_MINI_V2
bool "Librem Mini v2"
select BOARD_PURISM_BASEBOARD_LIBREM_CNL
select SOC_INTEL_COMETLAKE_1