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heads/boards/librem_mini/initrd/bin/set_ec_poweron.sh

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librem_mini,librem_mini_v2: Don't use three values for auto poweron PureBoot doesn't have any other three-valued settings and this doesn't present very well in the config UI. Instead make this a two-valued setting; drop the mode that forces the EC setting to "stay off" at every boot because this is the default. When disabling automatic power-on, disable the EC BRAM setting too. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
2023-03-25 14:49:15 +00:00
#!/bin/bash
# Set the EC BRAM setting for automatic power-on.
# If $1 is 'y', enable automatic power-on. Otherwise, disable it.
# EC BRAM bank 1
BRAMADDR=0x360
BRAMDATA=0x361
if [ "$1" = "y" ]; then
librem_mini,librem_mini_v2: Enable CMOS layout, update CMOS checksum Enable the coreboot CMOS option table, which initializes CMOS if the checksum is not valid. There is now a checksum in the CMOS layout since 4.21, update it when updating the Mini v1/v2 EC power-on setting. coreboot 4.21 will reset the CMOS settings during the first boot, since there was no checksum in prior releases. Heads will restore the automatic power-on setting during init based on config.user. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
2023-08-29 19:55:20 +00:00
BRAM_VALUE="0x00" # 0 -> automatic power-on
librem_mini,librem_mini_v2: Don't use three values for auto poweron PureBoot doesn't have any other three-valued settings and this doesn't present very well in the config UI. Instead make this a two-valued setting; drop the mode that forces the EC setting to "stay off" at every boot because this is the default. When disabling automatic power-on, disable the EC BRAM setting too. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
2023-03-25 14:49:15 +00:00
else
librem_mini,librem_mini_v2: Enable CMOS layout, update CMOS checksum Enable the coreboot CMOS option table, which initializes CMOS if the checksum is not valid. There is now a checksum in the CMOS layout since 4.21, update it when updating the Mini v1/v2 EC power-on setting. coreboot 4.21 will reset the CMOS settings during the first boot, since there was no checksum in prior releases. Heads will restore the automatic power-on setting during init based on config.user. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
2023-08-29 19:55:20 +00:00
BRAM_VALUE="0x01" # 1 -> stay off
librem_mini,librem_mini_v2: Don't use three values for auto poweron PureBoot doesn't have any other three-valued settings and this doesn't present very well in the config UI. Instead make this a two-valued setting; drop the mode that forces the EC setting to "stay off" at every boot because this is the default. When disabling automatic power-on, disable the EC BRAM setting too. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
2023-03-25 14:49:15 +00:00
fi
librem_mini,librem_mini_v2: Enable CMOS layout, update CMOS checksum Enable the coreboot CMOS option table, which initializes CMOS if the checksum is not valid. There is now a checksum in the CMOS layout since 4.21, update it when updating the Mini v1/v2 EC power-on setting. coreboot 4.21 will reset the CMOS settings during the first boot, since there was no checksum in prior releases. Heads will restore the automatic power-on setting during init based on config.user. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
2023-08-29 19:55:20 +00:00
outb "$BRAMADDR" 0x29 # Select byte at offset 29h
outb "$BRAMDATA" "$BRAM_VALUE"
# There's also a 16-bit checksum at offset 3eh in bank 1. The only byte
# included in the checksum is the automatic power-on setting, so the value is
# the same, and the upper 8 bits remain 0.
outb "$BRAMADDR" 0x3e
outb "$BRAMDATA" "$BRAM_VALUE"
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