+static void sis190_free_phy(struct list_head *first_phy)
+{
+ struct sis190_phy *cur, *next;
+
+ list_for_each_entry_safe(cur, next, first_phy, list) {
+ kfree(cur);
+ }
+}
+
+/**
+ * sis190_default_phy - Select default PHY for sis190 mac.
+ * @dev: the net device to probe for
+ *
+ * Select first detected PHY with link as default.
+ * If no one is link on, select PHY whose types is HOME as default.
+ * If HOME doesn't exist, select LAN.
+ */
+static u16 sis190_default_phy(struct net_device *dev)
+{
+ struct sis190_phy *phy, *phy_home, *phy_default, *phy_lan;
+ struct sis190_private *tp = netdev_priv(dev);
+ struct mii_if_info *mii_if = &tp->mii_if;
+ void __iomem *ioaddr = tp->mmio_addr;
+ u16 status;
+
+ phy_home = phy_default = phy_lan = NULL;
+
+ list_for_each_entry(phy, &tp->first_phy, list) {
+ status = mdio_read_latched(ioaddr, phy->phy_id, MII_BMSR);
+
+ // Link ON & Not select default PHY & not ghost PHY.
+ if ((status & BMSR_LSTATUS) &&
+ !phy_default &&
+ (phy->type != UNKNOWN)) {
+ phy_default = phy;
+ } else {
+ status = mdio_read(ioaddr, phy->phy_id, MII_BMCR);
+ mdio_write(ioaddr, phy->phy_id, MII_BMCR,
+ status | BMCR_ANENABLE | BMCR_ISOLATE);
+ if (phy->type == HOME)
+ phy_home = phy;
+ else if (phy->type == LAN)
+ phy_lan = phy;
+ }
+ }
+
+ if (!phy_default) {
+ if (phy_home)
+ phy_default = phy_home;
+ else if (phy_lan)
+ phy_default = phy_lan;
+ else
+ phy_default = list_entry(&tp->first_phy,
+ struct sis190_phy, list);
+ }
+
+ if (mii_if->phy_id != phy_default->phy_id) {
+ mii_if->phy_id = phy_default->phy_id;
+ net_probe(tp, KERN_INFO
+ "%s: Using transceiver at address %d as default.\n",
+ pci_name(tp->pci_dev), mii_if->phy_id);
+ }
+
+ status = mdio_read(ioaddr, mii_if->phy_id, MII_BMCR);
+ status &= (~BMCR_ISOLATE);
+
+ mdio_write(ioaddr, mii_if->phy_id, MII_BMCR, status);
+ status = mdio_read_latched(ioaddr, mii_if->phy_id, MII_BMSR);
+
+ return status;
+}
+
+static void sis190_init_phy(struct net_device *dev, struct sis190_private *tp,
+ struct sis190_phy *phy, unsigned int phy_id,
+ u16 mii_status)
+{
+ void __iomem *ioaddr = tp->mmio_addr;
+ struct mii_chip_info *p;
+
+ INIT_LIST_HEAD(&phy->list);
+ phy->status = mii_status;
+ phy->phy_id = phy_id;
+
+ phy->id[0] = mdio_read(ioaddr, phy_id, MII_PHYSID1);
+ phy->id[1] = mdio_read(ioaddr, phy_id, MII_PHYSID2);
+
+ for (p = mii_chip_table; p->type; p++) {
+ if ((p->id[0] == phy->id[0]) &&
+ (p->id[1] == (phy->id[1] & 0xfff0))) {
+ break;
+ }
+ }
+
+ if (p->id[1]) {
+ phy->type = (p->type == MIX) ?
+ ((mii_status & (BMSR_100FULL | BMSR_100HALF)) ?
+ LAN : HOME) : p->type;
+ } else
+ phy->type = UNKNOWN;
+
+ net_probe(tp, KERN_INFO "%s: %s transceiver at address %d.\n",
+ pci_name(tp->pci_dev),
+ (phy->type == UNKNOWN) ? "Unknown PHY" : p->name, phy_id);
+}
+
+/**
+ * sis190_mii_probe - Probe MII PHY for sis190
+ * @dev: the net device to probe for
+ *
+ * Search for total of 32 possible mii phy addresses.
+ * Identify and set current phy if found one,
+ * return error if it failed to found.
+ */
+static int __devinit sis190_mii_probe(struct net_device *dev)
+{
+ struct sis190_private *tp = netdev_priv(dev);
+ struct mii_if_info *mii_if = &tp->mii_if;
+ void __iomem *ioaddr = tp->mmio_addr;
+ int phy_id;
+ int rc = 0;
+
+ INIT_LIST_HEAD(&tp->first_phy);
+
+ for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
+ struct sis190_phy *phy;
+ u16 status;
+
+ status = mdio_read_latched(ioaddr, phy_id, MII_BMSR);
+
+ // Try next mii if the current one is not accessible.
+ if (status == 0xffff || status == 0x0000)
+ continue;
+
+ phy = kmalloc(sizeof(*phy), GFP_KERNEL);
+ if (!phy) {
+ sis190_free_phy(&tp->first_phy);
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ sis190_init_phy(dev, tp, phy, phy_id, status);
+
+ list_add(&tp->first_phy, &phy->list);
+ }
+
+ if (list_empty(&tp->first_phy)) {
+ net_probe(tp, KERN_INFO "%s: No MII transceivers found!\n",
+ pci_name(tp->pci_dev));
+ rc = -EIO;
+ goto out;
+ }
+
+ /* Select default PHY for mac */
+ sis190_default_phy(dev);
+
+ mii_if->dev = dev;
+ mii_if->mdio_read = __mdio_read;
+ mii_if->mdio_write = __mdio_write;
+ mii_if->phy_id_mask = PHY_ID_ANY;
+ mii_if->reg_num_mask = MII_REG_ANY;
+out:
+ return rc;
+}
+
+static void __devexit sis190_mii_remove(struct net_device *dev)
+{
+ struct sis190_private *tp = netdev_priv(dev);
+
+ sis190_free_phy(&tp->first_phy);
+}
+
projects / linux-2.6-omap-h63xx.git / blobdiff