diff --git a/litepcie/software/kernel/config.h b/litepcie/software/kernel/config.h
index e7da5d0..7c3109a 100644
--- a/litepcie/software/kernel/config.h
+++ b/litepcie/software/kernel/config.h
@@ -4,7 +4,7 @@
  *
  * This file is part of LitePCIe.
  *
- * Copyright (C) 2018-2023 / EnjoyDigital  / florent@enjoy-digital.fr
+ * Copyright (C) 2018-2024 / EnjoyDigital  / florent@enjoy-digital.fr
  *
  */
 
diff --git a/litepcie/software/kernel/flags.h b/litepcie/software/kernel/flags.h
index 7e3b924..3708432 100644
--- a/litepcie/software/kernel/flags.h
+++ b/litepcie/software/kernel/flags.h
@@ -4,20 +4,31 @@
  *
  * This file is part of LitePCIe.
  *
- * Copyright (C) 2018-2023 / EnjoyDigital  / florent@enjoy-digital.fr
+ * Copyright (C) 2018-2024 / EnjoyDigital  / florent@enjoy-digital.fr
  *
  */
 
 #ifndef __HW_FLAGS_H
 #define __HW_FLAGS_H
 
-/* spi */
+/* SPI */
 #define SPI_CTRL_START  (1 << 0)
 #define SPI_CTRL_LENGTH (1 << 8)
 #define SPI_STATUS_DONE (1 << 0)
 
-/* pcie */
+/* PCIe */
 #define DMA_TABLE_LOOP_INDEX (1 <<  0)
 #define DMA_TABLE_LOOP_COUNT (1 << 16)
 
+/* ICAP */
+#define ICAP_CMD_REG   0b00100
+#define ICAP_CMD_IPROG 0b01111
+
+#define ICAP_IDCODE_REG   0b01100
+
+#define ICAP_BOOTSTS_REG  0b10110
+#define ICAP_BOOTSTS_VALID    (1 << 0)
+#define ICAP_BOOTSTS_FALLBACK (1 << 1)
+
+
 #endif /* __HW_FLAGS_H */
diff --git a/litepcie/software/kernel/litepcie.h b/litepcie/software/kernel/litepcie.h
index 5f1dc78..89aaaf3 100644
--- a/litepcie/software/kernel/litepcie.h
+++ b/litepcie/software/kernel/litepcie.h
@@ -4,7 +4,7 @@
  *
  * This file is part of LitePCIe.
  *
- * Copyright (C) 2018-2023 / EnjoyDigital  / florent@enjoy-digital.fr
+ * Copyright (C) 2018-2024 / EnjoyDigital  / florent@enjoy-digital.fr
  *
  */
 
diff --git a/litepcie/software/kernel/main.c b/litepcie/software/kernel/main.c
index b8c10e7..fb4ad7d 100644
--- a/litepcie/software/kernel/main.c
+++ b/litepcie/software/kernel/main.c
@@ -4,7 +4,7 @@
  *
  * This file is part of LitePCIe.
  *
- * Copyright (C) 2018-2023 / EnjoyDigital  / florent@enjoy-digital.fr
+ * Copyright (C) 2018-2024 / EnjoyDigital  / florent@enjoy-digital.fr
  *
  */
 
@@ -312,7 +312,7 @@ static void litepcie_dma_reader_stop(struct litepcie_device *s, int chan_num)
 	dmachan->reader_sw_count = 0;
 }
 
-void litepcie_stop_dma(struct litepcie_device *s)
+static void litepcie_stop_dma(struct litepcie_device *s)
 {
 	struct litepcie_dma_chan *dmachan;
 	int i;
@@ -965,42 +965,6 @@ static void litepcie_free_chdev(struct litepcie_device *s)
 	}
 }
 
-/* from stackoverflow */
-void sfind(char *string, char *format, ...)
-{
-	va_list arglist;
-
-	va_start(arglist, format);
-	vsscanf(string, format, arglist);
-	va_end(arglist);
-}
-
-struct revision {
-	int yy;
-	int mm;
-	int dd;
-};
-
-int compare_revisions(struct revision d1, struct revision d2)
-{
-	if (d1.yy < d2.yy)
-		return -1;
-	else if (d1.yy > d2.yy)
-		return 1;
-
-	if (d1.mm < d2.mm)
-		return -1;
-	else if (d1.mm > d2.mm)
-		return 1;
-	else if (d1.dd < d2.dd)
-		return -1;
-	else if (d1.dd > d2.dd)
-		return 1;
-
-	return 0;
-}
-/* from stackoverflow */
-
 /* Function to probe the LitePCIe PCI device */
 static int litepcie_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {