From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 16 Feb 2010 18:29:16 +0000 (+0000)
Subject: mpc83xx: add a workaround for erratum eTSEC27 in earlier mpc8313 chip revs
X-Git-Tag: reboot~21031
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2f706d3d5b554981bb30c54396eab5c32ccc14d7;p=openwrt%2Fstaging%2Fchunkeey.git

mpc83xx: add a workaround for erratum eTSEC27 in earlier mpc8313 chip revs

SVN-Revision: 19670
---

diff --git a/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch b/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch
new file mode 100644
index 0000000000..111434b2cd
--- /dev/null
+++ b/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch
@@ -0,0 +1,18 @@
+--- a/drivers/net/gianfar.c
++++ b/drivers/net/gianfar.c
+@@ -334,7 +334,14 @@ static int gfar_probe(struct of_device *
+ 	/* We need to delay at least 3 TX clocks */
+ 	udelay(2);
+ 
+-	tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
++	/*
++	 * Do not enable flow control on chips earlier than rev 1.1,
++	 * because of the eTSEC27 erratum
++	 */
++	tempval = 0;
++	if (mfspr(SPRN_SVR) & 0xffff >= 0x0011)
++		tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
++
+ 	gfar_write(&priv->regs->maccfg1, tempval);
+ 
+ 	/* Initialize MACCFG2. */