pasemi_mac: PHY support

PHY support for pasemi_mac.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 133 insertions, 0 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 372f25716b5b..b86ccd2ecd5b 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2488,6 +2488,7 @@ config NETXEN_NIC
 config PASEMI_MAC
         tristate "PA Semi 1/10Gbit MAC"
         depends on PPC64 && PCI
+        select PHYLIB
         help
           This driver supports the on-chip 1/10Gbit Ethernet controller on
           PA Semi's PWRficient line of chips.
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 4c6d34d6989c..78b127c404e9 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -606,6 +606,114 @@ static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
         return IRQ_HANDLED;
 }
 
+static void pasemi_adjust_link(struct net_device *dev)
+{
+        struct pasemi_mac *mac = netdev_priv(dev);
+        int msg;
+        unsigned int flags;
+        unsigned int new_flags;
+
+        if (!mac->phydev->link) {
+                /* If no link, MAC speed settings don't matter. Just report
+                 * link down and return.
+                 */
+                if (mac->link && netif_msg_link(mac))
+                        printk(KERN_INFO "%s: Link is down.\n", dev->name);
+
+                netif_carrier_off(dev);
+                mac->link = 0;
+
+                return;
+        } else
+                netif_carrier_on(dev);
+
+        pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
+        new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
+                              PAS_MAC_CFG_PCFG_TSR_M);
+
+        if (!mac->phydev->duplex)
+                new_flags |= PAS_MAC_CFG_PCFG_HD;
+
+        switch (mac->phydev->speed) {
+        case 1000:
+                new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
+                             PAS_MAC_CFG_PCFG_TSR_1G;
+                break;
+        case 100:
+                new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
+                             PAS_MAC_CFG_PCFG_TSR_100M;
+                break;
+        case 10:
+                new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
+                             PAS_MAC_CFG_PCFG_TSR_10M;
+                break;
+        default:
+                printk("Unsupported speed %d\n", mac->phydev->speed);
+        }
+
+        /* Print on link or speed/duplex change */
+        msg = mac->link != mac->phydev->link || flags != new_flags;
+
+        mac->duplex = mac->phydev->duplex;
+        mac->speed = mac->phydev->speed;
+        mac->link = mac->phydev->link;
+
+        if (new_flags != flags)
+                pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
+
+        if (msg && netif_msg_link(mac))
+                printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
+                       dev->name, mac->speed, mac->duplex ? "full" : "half");
+}
+
+static int pasemi_mac_phy_init(struct net_device *dev)
+{
+        struct pasemi_mac *mac = netdev_priv(dev);
+        struct device_node *dn, *phy_dn;
+        struct phy_device *phydev;
+        unsigned int phy_id;
+        const phandle *ph;
+        const unsigned int *prop;
+        struct resource r;
+        int ret;
+
+        dn = pci_device_to_OF_node(mac->pdev);
+        ph = get_property(dn, "phy-handle", NULL);
+        if (!ph)
+                return -ENODEV;
+        phy_dn = of_find_node_by_phandle(*ph);
+
+        prop = get_property(phy_dn, "reg", NULL);
+        ret = of_address_to_resource(phy_dn->parent, 0, &r);
+        if (ret)
+                goto err;
+
+        phy_id = *prop;
+        snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
+
+        of_node_put(phy_dn);
+
+        mac->link = 0;
+        mac->speed = 0;
+        mac->duplex = -1;
+
+        phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
+
+        if (IS_ERR(phydev)) {
+                printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
+                return PTR_ERR(phydev);
+        }
+
+        mac->phydev = phydev;
+
+        return 0;
+
+err:
+        of_node_put(phy_dn);
+        return -ENODEV;
+}
+
+
 static int pasemi_mac_open(struct net_device *dev)
 {
         struct pasemi_mac *mac = netdev_priv(dev);
@@ -678,6 +786,13 @@ static int pasemi_mac_open(struct net_device *dev)
 
         pasemi_mac_replenish_rx_ring(dev);
 
+        ret = pasemi_mac_phy_init(dev);
+        /* Some configs don't have PHYs (XAUI etc), so don't complain about
+         * failed init due to -ENODEV.
+         */
+        if (ret && ret != -ENODEV)
+                dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
+
         netif_start_queue(dev);
         netif_poll_enable(dev);
 
@@ -708,6 +823,9 @@ static int pasemi_mac_open(struct net_device *dev)
                 goto out_rx_int;
         }
 
+        if (mac->phydev)
+                phy_start(mac->phydev);
+
         return 0;
 
 out_rx_int:
@@ -731,6 +849,11 @@ static int pasemi_mac_close(struct net_device *dev)
         unsigned int stat;
         int retries;
 
+        if (mac->phydev) {
+                phy_stop(mac->phydev);
+                phy_disconnect(mac->phydev);
+        }
+
         netif_stop_queue(dev);
 
         /* Clean out any pending buffers */
@@ -1028,6 +1151,9 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
         mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
 
+        /* Enable most messages by default */
+        mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
+
         err = register_netdev(dev);
 
         if (err) {
diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h
index 6539de1c2f23..8bc0cea8b145 100644
--- a/drivers/net/pasemi_mac.h
+++ b/drivers/net/pasemi_mac.h
@@ -24,6 +24,7 @@
 #include <linux/ethtool.h>
 #include <linux/netdevice.h>
 #include <linux/spinlock.h>
+#include <linux/phy.h>
 
 struct pasemi_mac_txring {
         spinlock_t       lock;
@@ -54,6 +55,7 @@ struct pasemi_mac {
         struct pci_dev *pdev;
         struct pci_dev *dma_pdev;
         struct pci_dev *iob_pdev;
+        struct phy_device *phydev;
         struct net_device_stats stats;
 
         /* Pointer to the cacheable per-channel status registers */
@@ -75,8 +77,12 @@ struct pasemi_mac {
         struct pasemi_mac_rxring *rx;
         unsigned long   tx_irq;
         unsigned long   rx_irq;
+        int     link;
+        int     speed;
+        int     duplex;
 
         unsigned int    msg_enable;
+        char    phy_id[BUS_ID_SIZE];
 };
 
 /* Software status descriptor (desc_info) */