update t440p script

2026-04-14 01:16:13 -07:00
parent cf15115731
commit aaa53d6a09
19 changed files with 1046 additions and 11 deletions
@@ -0,0 +1,85 @@
+#!/bin/sh
+# Step: Revert to original BIOS
+
+step_revert_bios() {
+  section "Revert to Original BIOS"
+
+  if [ ! -f "$ORIGINAL_ROM" ]; then
+    error "Original ROM not found: $ORIGINAL_ROM"
+    error "Cannot revert without the original backup."
+    return 1
+  fi
+
+  echo "  How would you like to revert?"
+  echo ""
+  echo "  1) Can't boot  - Use external CH341A programmer"
+  echo "  2) Can boot     - Flash internally (requires iomem=relaxed)"
+  echo "  3) Cancel"
+  echo ""
+
+  printf "${CYAN}Choice [1-3]:${NC} "
+  read -r _choice
+
+  case "$_choice" in
+    1) _revert_external ;;
+    2) _revert_internal ;;
+    *) info "Revert cancelled."; return 0 ;;
+  esac
+}
+
+_revert_external() {
+  info "Reverting via external programmer..."
+  echo ""
+
+  cd "$WORK_DIR" || return 1
+
+  # Split original ROM for both chips
+  info "Splitting original ROM..."
+  run_cmd "dd if=t440p-original.rom of=bottom.rom bs=1M count=8" || return 1
+  run_cmd "dd if=t440p-original.rom of=top.rom bs=1M skip=8" || return 1
+
+  # Flash 4MB (top) chip
+  info "Attach the programmer to the 4MB (top) chip."
+  prompt_continue
+
+  info "Flashing original 4MB chip..."
+  run_cmd "sudo flashrom --programmer ch341a_spi -w top.rom" || return 1
+  success "4MB chip restored."
+
+  # Flash 8MB (bottom) chip
+  echo ""
+  info "Now attach the programmer to the 8MB (bottom) chip."
+  prompt_continue
+
+  info "Flashing original 8MB chip..."
+  run_cmd "sudo flashrom --programmer ch341a_spi -w bottom.rom" || return 1
+  success "8MB chip restored."
+
+  echo ""
+  success "Original BIOS restored! Reassemble and power on."
+}
+
+_revert_internal() {
+  info "Reverting via internal flash..."
+  echo ""
+
+  warn "This requires the kernel parameter iomem=relaxed."
+  echo ""
+
+  if prompt_yes_default "Set iomem=relaxed in GRUB and reboot first?"; then
+    info "Adding iomem=relaxed to GRUB config..."
+    run_cmd "sudo sed -i '/GRUB_CMDLINE_LINUX_DEFAULT/ s/\"/ iomem=relaxed\"/2' /etc/default/grub" || return 1
+    run_cmd "sudo grub-mkconfig -o /boot/grub/grub.cfg" || return 1
+    echo ""
+    warn "You must reboot now for iomem=relaxed to take effect."
+    info "After rebooting, run this script again and choose the internal revert option."
+    return 0
+  fi
+
+  info "Flashing original BIOS internally..."
+  run_cmd "sudo flashrom -p internal:laptop=force_I_want_a_brick -w $ORIGINAL_ROM" || return 1
+
+  success "Original BIOS restored! Reboot to apply."
+  echo ""
+  warn "Remember to remove iomem=relaxed from your GRUB config after reverting."
+}