If the firmware missed to initialize the PHY correctly,
Linux may hang up on socrates while eth0/eth1 interface
startup (caused by continuous unacknowledged PHY interrupt).
This patch adds PHY fixup to socrates platform code to
ensure the PHY is pre-initialized correctly. It is needed
to be compatible with older firmware.
Signed-off-by: Anatolij Gustschin <ag...@denx.de>
---
Changes since first version:
use macros instead of register numbers as
suggested by Anton
Kumar, could you please consider this patch for
inclusion into 2.6.30? Thanks!
arch/powerpc/platforms/85xx/socrates.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/85xx/socrates.c
b/arch/powerpc/platforms/85xx/socrates.c
index d0e8443..bde0a97 100644
--- a/arch/powerpc/platforms/85xx/socrates.c
+++ b/arch/powerpc/platforms/85xx/socrates.c
@@ -28,6 +28,7 @@
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of_platform.h>
+#include <linux/phy.h>
#include <asm/system.h>
#include <asm/time.h>
@@ -78,6 +79,23 @@ static void __init socrates_pic_init(void)
of_node_put(np);
}
+#define MII_M1011_IMASK 0x12
+#define MII_M1011_IEVENT 0x13
+static int socrates_m88e1121_fixup(struct phy_device *phydev)
+{
+ int err;
+
+ err = phy_write(phydev, MII_M1011_IMASK, 0);
+ if (err < 0)
+ return err;
+
+ err = phy_read(phydev, MII_M1011_IEVENT);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
/*
* Setup the architecture
*/
@@ -105,6 +123,8 @@ static struct of_device_id __initdata socrates_of_bus_ids[]
= {
static void __init socrates_init(void)
{
of_platform_bus_probe(NULL, socrates_of_bus_ids, NULL);
+ phy_register_fixup_for_uid(0x1410cb0, 0xffffff0,
+ socrates_m88e1121_fixup);
}
/*
--
1.5.6.3
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