netdev - Re: [PATCH] SMSC LAN911x and LAN921x vendor driver

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Date:	Wed, 08 Aug 2007 01:09:40 +0200
From:	Peter Korsgaard <jacmet@...site.dk>
To:	Steve.Glendinning@...c.com
Cc:	Bahadir Balban <Bahadir.Balban@....com>,
	Bill Gatliff <bgat@...lgatliff.com>,
	Dustin Mcintire <dustin@...soria.com>, ian.saturley@...c.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] SMSC LAN911x and LAN921x vendor driver

>>>>> "Peter" == Peter Korsgaard <jacmet@...site.dk> writes:

Hi,

 Peter> I'll give your driver a try and report back.

Ok, the driver seems to be working (after fixing up the accessor
routines for my hw setup) and performance is comparable to Dustin's
driver.

It would be nice if the driver would enable the byte swapping support
in the hw if it detects the wrong endian - Like this:

Index: linux/drivers/net/smsc911x.c
===================================================================
--- linux.orig/drivers/net/smsc911x.c
+++ linux/drivers/net/smsc911x.c
@@ -1787,6 +1787,13 @@
 		return -ENODEV;
 	}
 
+	/* check endian */
+	if (smsc911x_reg_read(pdata, BYTE_TEST) == 0x43218765) {
+		SMSC_TRACE("Byte test looks swapped, inverting");
+		smsc911x_reg_write(~smsc911x_reg_read(pdata, ENDIAN),
+				   pdata, ENDIAN);
+	}
+
 	/* Default generation to zero (all workarounds apply) */
 	pdata->generation = 0;

-- 
Bye, Peter Korsgaard

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