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

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19670 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2010-02-16 18:29:16 +00:00
parent 3fd6746e0b
commit e710e0ceb7
1 changed files with 18 additions and 0 deletions
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18
target/linux/mpc83xx/patches-2.6.32/110-etsec27_war.patch Normal file
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@ -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. */