From: Michael Brown <mcb30@ipxe.org>
Date: Wed, 30 Jul 2025 14:59:38 +0000 (+0100)
Subject: [dwmac] Show core version in debug messages
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1505%2Fhead;p=thirdparty%2Fipxe.git

[dwmac] Show core version in debug messages

Read and display the core version immediately after mapping the MMIO
registers, to provide a basic sanity check that the registers have
been correctly mapped and the core is not held in reset.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---

diff --git a/src/drivers/net/dwmac.c b/src/drivers/net/dwmac.c
index 67656e7f1..f581a48a4 100644
--- a/src/drivers/net/dwmac.c
+++ b/src/drivers/net/dwmac.c
@@ -552,6 +552,7 @@ static int dwmac_probe ( struct dt_device *dt, unsigned int offset ) {
 	struct net_device *netdev;
 	struct dwmac *dwmac;
 	union dwmac_mac mac;
+	uint32_t version;
 	int rc;
 
 	/* Allocate and initialise net device */
@@ -580,6 +581,12 @@ static int dwmac_probe ( struct dt_device *dt, unsigned int offset ) {
 		rc = -ENODEV;
 		goto err_ioremap;
 	}
+	version = readl ( dwmac->regs + DWMAC_VER );
+	DBGC ( dwmac, "DWMAC %s version %x.%x (user %x.%x)\n", dwmac->name,
+	       DWMAC_VER_CORE_MAJOR ( version ),
+	       DWMAC_VER_CORE_MINOR ( version ),
+	       DWMAC_VER_USER_MAJOR ( version ),
+	       DWMAC_VER_USER_MINOR ( version ) );
 
 	/* Fetch devicetree MAC address */
 	if ( ( rc = fdt_mac ( &sysfdt, offset, netdev ) ) != 0 ) {
diff --git a/src/drivers/net/dwmac.h b/src/drivers/net/dwmac.h
index d36bfd4da..4de62b0ce 100644
--- a/src/drivers/net/dwmac.h
+++ b/src/drivers/net/dwmac.h
@@ -38,6 +38,14 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** Version register */
 #define DWMAC_VER DWMAC_MAC_REG ( 8 )
+#define DWMAC_VER_USER_MAJOR( x ) \
+	( ( (x) >> 12 ) & 0xf )			/**< User major version */
+#define DWMAC_VER_USER_MINOR( x ) \
+	( ( (x) >> 8 ) & 0xf )			/**< User minor version */
+#define DWMAC_VER_CORE_MAJOR( x ) \
+	( ( (x) >> 4 ) & 0xf )			/**< Core major version */
+#define DWMAC_VER_CORE_MINOR( x ) \
+	( ( (x) >> 0 ) & 0xf )			/**< Core minor version */
 
 /** Debug register */
 #define DWMAC_DEBUG DWMAC_MAC_REG ( 9 )