The vendor patches initialize those registers to get the
PHY working properly.
Sadly I don't have that PHY spec and whatever Broadcom PHY
code we already have don't seem to document these two shadow
registers (unless I miscalculated the address) so I'm keeping
this as "vendor magic for that board". The vendor has long
abandoned that product, but I find it handy to test ppc405
kernels and so would like to keep it alive upstream :-)
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
Note: Ideally, the whole driver should switch over to the
generic PHY layer. However this is a much bigger undertaking
which requires access to a bunch of HW to test, and for which
I have neither the time nor the HW available these days.
(Some of the HW could prove hard to find ...)
---
drivers/net/ethernet/ibm/emac/phy.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/net/ethernet/ibm/emac/phy.c
b/drivers/net/ethernet/ibm/emac/phy.c
index 35865d05fccd..daa10de542fb 100644
--- a/drivers/net/ethernet/ibm/emac/phy.c
+++ b/drivers/net/ethernet/ibm/emac/phy.c
@@ -24,6 +24,7 @@
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/delay.h>
+#include <linux/of.h>
#include "emac.h"
#include "phy.h"
@@ -363,6 +364,34 @@ static struct mii_phy_def bcm5248_phy_def = {
.ops = &generic_phy_ops
};
+static int bcm5482_init(struct mii_phy *phy)
+{
+ if (!of_machine_is_compatible("plathome,obs600"))
+ return 0;
+
+ /* Magic inits from vendor original patches */
+ phy_write(phy, 0x1c, 0xa410);
+ phy_write(phy, 0x1c, 0x8804);
+
+ return 0;
+}
+
+static const struct mii_phy_ops bcm5482_phy_ops = {
+ .init = bcm5482_init,
+ .setup_aneg = genmii_setup_aneg,
+ .setup_forced = genmii_setup_forced,
+ .poll_link = genmii_poll_link,
+ .read_link = genmii_read_link
+};
+
+static struct mii_phy_def bcm5482_phy_def = {
+
+ .phy_id = 0x0143bcb0,
+ .phy_id_mask = 0x0ffffff0,
+ .name = "BCM5482 Gigabit Ethernet",
+ .ops = &bcm5482_phy_ops
+};
+
static int m88e1111_init(struct mii_phy *phy)
{
pr_debug("%s: Marvell 88E1111 Ethernet\n", __func__);
@@ -499,6 +528,7 @@ static struct mii_phy_def *mii_phy_table[] = {
&et1011c_phy_def,
&cis8201_phy_def,
&bcm5248_phy_def,
+ &bcm5482_phy_def,
&m88e1111_phy_def,
&m88e1112_phy_def,
&ar8035_phy_def,
--
2.13.5
