diff --git a/Makefile b/Makefile
index 710943d..5f98fb5 100644
--- a/Makefile
+++ b/Makefile
@@ -24,6 +24,8 @@ $(SC_HV_H):
 $(SC_K_H):
 	$(MAKE) -C shellcode_kernel
 
+source/firmware.o: scripts/ubuntu/initramfs-tools scripts/ubuntu/ps5-wifi-fw
+
 $(OBJS): %.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
diff --git a/include/cpio.h b/include/cpio.h
new file mode 100644
index 0000000..f6b326a
--- /dev/null
+++ b/include/cpio.h
@@ -0,0 +1,19 @@
+#ifndef CPIO_H
+#define CPIO_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define CPIO_MODE_DIR 0040755
+#define CPIO_MODE_FILE 0100644
+
+size_t cpio_newc_entry_size(const char *name, size_t data_size);
+size_t cpio_newc_parent_dirs_size(const char *path);
+uint8_t *cpio_newc_data(uint8_t *entry, const char *name);
+uint8_t *cpio_newc_write_entry(uint8_t *out, const char *name, uint32_t mode,
+                               const void *data, size_t data_size,
+                               uint32_t ino);
+uint8_t *cpio_newc_write_parent_dirs(uint8_t *out, const char *path,
+                                     uint32_t *ino);
+
+#endif
diff --git a/include/firmware.h b/include/firmware.h
index fa79670..f94b4de 100644
--- a/include/firmware.h
+++ b/include/firmware.h
@@ -1,6 +1,12 @@
 #ifndef FIRMWARE_H
 #define FIRMWARE_H
 
+<<<<<<< dev-wifi-fw
 int dump_device_firmwares(const char *boot_file_path);
+=======
+#include <stddef.h>
+
+int resolve_device_firmwares(void **initrd, size_t *initrd_size);
+>>>>>>> main
 
 #endif
diff --git a/scripts/ubuntu/initramfs-tools b/scripts/ubuntu/initramfs-tools
new file mode 100644
index 0000000..f62f02e
--- /dev/null
+++ b/scripts/ubuntu/initramfs-tools
@@ -0,0 +1,14 @@
+if [ "${PS5_FW_INSTALL_DONE:-}" != y ] &&
+   [ -f /scripts/functions ] &&
+   [ -d /scripts/local-bottom ] &&
+   [ -n "$rootmnt" ] &&
+   [ -e "${rootmnt}/etc/os-release" ]; then
+  ID=
+  ID_LIKE=
+  . "${rootmnt}/etc/os-release"
+  case " ${ID} ${ID_LIKE} " in
+    *" ubuntu "*)
+      [ -e /scripts/ubuntu/ps5-wifi-fw ] && . /scripts/ubuntu/ps5-wifi-fw
+      ;;
+  esac
+fi
diff --git a/scripts/ubuntu/ps5-wifi-fw b/scripts/ubuntu/ps5-wifi-fw
new file mode 100644
index 0000000..b5411a0
--- /dev/null
+++ b/scripts/ubuntu/ps5-wifi-fw
@@ -0,0 +1,13 @@
+if [ "${PS5_FW_INSTALL_DONE:-}" != y ]; then
+  FW_PATH="usr/lib/firmware/nxp/pcieuartiw620_combo_v1.bin"
+  FW_SRC="/${FW_PATH}"
+  FW_DST="${rootmnt}/${FW_PATH}"
+  if [ -n "$rootmnt" ] && [ -f "$FW_SRC" ]; then
+    mkdir -p "${FW_DST%/*}"
+    cp "$FW_SRC" "$FW_DST"
+    chmod 0644 "$FW_DST"
+    PS5_FW_INSTALL_DONE=y
+    export PS5_FW_INSTALL_DONE
+    [ -e /dev/kmsg ] && printf 'ps5-fw-install: installed %s\n' "$FW_DST" > /dev/kmsg || true
+  fi
+fi
diff --git a/source/cpio.c b/source/cpio.c
new file mode 100644
index 0000000..aa66ffc
--- /dev/null
+++ b/source/cpio.c
@@ -0,0 +1,74 @@
+#include "cpio.h"
+#include <stdio.h>
+#include <string.h>
+
+#define CPIO_NEWC_HEADER_LEN 110
+
+static size_t cpio_newc_align4(size_t n) { return (n + 3) & ~3ULL; }
+
+size_t cpio_newc_entry_size(const char *name, size_t data_size) {
+  return cpio_newc_align4(CPIO_NEWC_HEADER_LEN + strlen(name) + 1) +
+         cpio_newc_align4(data_size);
+}
+
+uint8_t *cpio_newc_data(uint8_t *entry, const char *name) {
+  return (uint8_t *)cpio_newc_align4((uintptr_t)entry + CPIO_NEWC_HEADER_LEN +
+                                     strlen(name) + 1);
+}
+
+uint8_t *cpio_newc_write_entry(uint8_t *out, const char *name, uint32_t mode,
+                               const void *data, size_t data_size,
+                               uint32_t ino) {
+  size_t name_size = strlen(name) + 1;
+
+  out = (uint8_t *)cpio_newc_align4((uintptr_t)out);
+
+  sprintf((char *)out,
+          "070701%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X%08X",
+          ino, mode, 0, 0, 1, 0, (uint32_t)data_size, 0, 0, 0, 0,
+          (uint32_t)name_size, 0);
+  out += CPIO_NEWC_HEADER_LEN;
+
+  memcpy(out, name, name_size);
+  out += name_size;
+  out = (uint8_t *)cpio_newc_align4((uintptr_t)out);
+
+  if (data_size != 0 && data != out) {
+    memcpy(out, data, data_size);
+  }
+  out += data_size;
+  out = (uint8_t *)cpio_newc_align4((uintptr_t)out);
+
+  return out;
+}
+
+size_t cpio_newc_parent_dirs_size(const char *path) {
+  char tmp[256];
+  size_t total = 0;
+
+  snprintf(tmp, sizeof(tmp), "%s", path);
+  for (char *p = strchr(tmp, '/'); p != NULL; p = strchr(p + 1, '/')) {
+    *p = '\0';
+    if (tmp[0] != '\0')
+      total += cpio_newc_entry_size(tmp, 0);
+    *p = '/';
+  }
+
+  return total;
+}
+
+uint8_t *cpio_newc_write_parent_dirs(uint8_t *out, const char *path,
+                                     uint32_t *ino) {
+  char tmp[256];
+
+  snprintf(tmp, sizeof(tmp), "%s", path);
+  for (char *p = strchr(tmp, '/'); p != NULL; p = strchr(p + 1, '/')) {
+    *p = '\0';
+    if (tmp[0] != '\0') {
+      out = cpio_newc_write_entry(out, tmp, CPIO_MODE_DIR, NULL, 0, (*ino)++);
+    }
+    *p = '/';
+  }
+
+  return out;
+}