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

SVN-Revision: 19670
15 years ago · 2f706d3d5b
parent 2b1e4dccaf
commit 2f706d3d5b
1 changed files with 18 additions and 0 deletions
--- a/target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch
+++ 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. */