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authorGabor Juhos <juhosg@openwrt.org>2010-04-09 08:40:12 +0000
committerGabor Juhos <juhosg@openwrt.org>2010-04-09 08:40:12 +0000
commit72d43537286debda3407c1b76361775d2307cbbb (patch)
treeaae80646daf8678896766525dacd6885923c474e
parentd6c03638848d1b31beb79a828e875119f12cf316 (diff)
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generic: make chip detection more reliable in the AR8216 driver
Fixes broken ethernet on the Planex MZK-W04NU/W300NH boards. Cc: bacfire@openwrt.org SVN-Revision: 20753
-rw-r--r--target/linux/generic-2.6/files/drivers/net/phy/ar8216.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/target/linux/generic-2.6/files/drivers/net/phy/ar8216.c b/target/linux/generic-2.6/files/drivers/net/phy/ar8216.c
index 394e50d479..a473e3b181 100644
--- a/target/linux/generic-2.6/files/drivers/net/phy/ar8216.c
+++ b/target/linux/generic-2.6/files/drivers/net/phy/ar8216.c
@@ -33,6 +33,7 @@
/* size of the vlan table */
#define AR8X16_MAX_VLANS 128
+#define AR8X16_PROBE_RETRIES 10
struct ar8216_priv {
struct switch_dev dev;
@@ -119,8 +120,25 @@ ar8216_id_chip(struct ar8216_priv *priv)
{
u32 val;
u16 id;
+ int i;
+
val = ar8216_mii_read(priv, AR8216_REG_CTRL);
+ if (val == ~0)
+ return UNKNOWN;
+
id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
+ for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
+ u16 t;
+
+ val = ar8216_mii_read(priv, AR8216_REG_CTRL);
+ if (val == ~0)
+ return UNKNOWN;
+
+ t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
+ if (t != id)
+ return UNKNOWN;
+ }
+
switch (id) {
case 0x0101:
return AR8216;
@@ -736,11 +754,13 @@ static int
ar8216_probe(struct phy_device *pdev)
{
struct ar8216_priv priv;
+ u16 chip;
priv.phy = pdev;
- if (ar8216_id_chip(&priv) == UNKNOWN) {
+ chip = ar8216_id_chip(&priv);
+ if (chip == UNKNOWN)
return -ENODEV;
- }
+
return 0;
}