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#!/bin/sh -e
# Apply fixes over FSI to POWER9 hosts. Required before VCS rail on.
PDBG=${PDBG:-pdbg}
# Argument [device]: if provided, pass to pdbg as "-d [device]"
DEVICE_OPT=${1:+-d $1}
putcfam()
{
$PDBG -b fsi $DEVICE_OPT putcfam $1 $2 $3
}
# P9 dd1 required workaround needed before powering VCS rails
p9_dd1_vcs_workaround()
{
putcfam 0x2810 0x00000000 0x00010000 && # Unfence PLL controls
putcfam 0x281A 0x40000000 0x40000000 && # Assert Perv chiplet endpoint reset, just in case
putcfam 0x281A 0x00000001 0x00000001 # Enable Nest PLL
}
# Put the CFAM/FSI slave into async mode
putcfam 0x900 1
p9_dd1_vcs_workaround
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