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authorbenoit.thebaudeau@advans <benoit.thebaudeau@advans>2012-07-19 02:12:46 +0000
committerJoe Hershberger <joe.hershberger@ni.com>2012-07-19 11:46:13 -0500
commit9d2d924a0a728a4f852a3e9de7aa6cc72c4b460d (patch)
treebde3e3ebe3ce16002ffd26a60658941b89b20d17 /drivers/net
parent48a3e999c86e7e6033133152b07a308def559d46 (diff)
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net: fec_mxc: Fix setting of RCR for xMII
At least on i.MX25, the RMII mode did not work, which is fixed by this patch. The MII_MODE bit of the FEC RCR register means xMII, i.e. 'not 7-wire', so set it accordingly. According to the xMII and 7-wire (aka GPSI) standards, full duplex should be available on xMII, but not on 7-wire, so set FCE accordingly. The FEC may support full duplex for 7-wire too, but the reference manual does not say that, so avoid an invalid assumption. Actually, the choice between half and full duplex also depends on the endpoint/switch/repeater configuration, so a config option could be added for that, but there has been no need for it so far. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com> Cc: Joe Hershberger <joe.hershberger@gmail.com> Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/fec_mxc.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 5700552..ddbdd33 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -424,14 +424,12 @@ static void fec_reg_setup(struct fec_priv *fec)
/* Start with frame length = 1518, common for all modes. */
rcntrl = PKTSIZE << FEC_RCNTRL_MAX_FL_SHIFT;
- if (fec->xcv_type == SEVENWIRE)
- rcntrl |= FEC_RCNTRL_FCE;
- else if (fec->xcv_type == RGMII)
+ if (fec->xcv_type != SEVENWIRE) /* xMII modes */
+ rcntrl |= FEC_RCNTRL_FCE | FEC_RCNTRL_MII_MODE;
+ if (fec->xcv_type == RGMII)
rcntrl |= FEC_RCNTRL_RGMII;
else if (fec->xcv_type == RMII)
rcntrl |= FEC_RCNTRL_RMII;
- else /* MII mode */
- rcntrl |= FEC_RCNTRL_FCE | FEC_RCNTRL_MII_MODE;
writel(rcntrl, &fec->eth->r_cntrl);
}