[PATCH] sb1250-mac: PHY probing fixes.

Improve sb1250-mac driver to probe for PHYs at addresses other
than 1, such as the PHYs on BigSur.

Signed-Off-By: Andy Isaacson <adi@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c
index d4c8ecdfa4a7..aa4ca1821759 100644
--- a/drivers/net/sb1250-mac.c
+++ b/drivers/net/sb1250-mac.c
@@ -296,6 +296,7 @@ static void sbmac_set_rx_mode(struct net_device *dev);
 static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 static int sbmac_close(struct net_device *dev);
 static int sbmac_mii_poll(struct sbmac_softc *s,int noisy);
+static int sbmac_mii_probe(struct net_device *dev);
 
 static void sbmac_mii_sync(struct sbmac_softc *s);
 static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt);
@@ -433,6 +434,9 @@ static uint64_t sbmac_orig_hwaddr[MAX_UNITS];
 
 #define MII_BMCR        0x00    /* Basic mode control register (rw) */
 #define MII_BMSR        0x01    /* Basic mode status register (ro) */
+#define MII_PHYIDR1     0x02
+#define MII_PHYIDR2     0x03
+
 #define MII_K1STSR      0x0A    /* 1K Status Register (ro) */
 #define MII_ANLPAR      0x05    /* Autonegotiation lnk partner abilities (rw) */
 
@@ -2432,6 +2436,15 @@ static int sbmac_open(struct net_device *dev)
                 return -EBUSY;
 
         /*
+         * Probe phy address
+         */
+
+        if(sbmac_mii_probe(dev) == -1) {
+                printk("%s: failed to probe PHY.\n", dev->name);
+                return -EINVAL;
+        }
+
+        /*
          * Configure default speed
          */
 
@@ -2464,6 +2477,29 @@ static int sbmac_open(struct net_device *dev)
         return 0;
 }
 
+static int sbmac_mii_probe(struct net_device *dev)
+{
+        int i;
+        struct sbmac_softc *s = netdev_priv(dev);
+        u16 bmsr, id1, id2;
+        u32 vendor, device;
+
+        for (i=1; i<31; i++) {
+        bmsr = sbmac_mii_read(s, i, MII_BMSR);
+                if (bmsr != 0) {
+                        s->sbm_phys[0] = i;
+                        id1 = sbmac_mii_read(s, i, MII_PHYIDR1);
+                        id2 = sbmac_mii_read(s, i, MII_PHYIDR2);
+                        vendor = ((u32)id1 << 6) | ((id2 >> 10) & 0x3f);
+                        device = (id2 >> 4) & 0x3f;
+
+                        printk(KERN_INFO "%s: found phy %d, vendor %06x part %02x\n",
+                                dev->name, i, vendor, device);
+                        return i;
+                }
+        }
+        return -1;
+}
 
 
 static int sbmac_mii_poll(struct sbmac_softc *s,int noisy)