[PATCH 02/13] sky2: add MII support

[shemminger]

Add MII ioctl interface to sky2.

Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>

--- sky2-netdev.orig/drivers/net/sky2.c
+++ sky2-netdev/drivers/net/sky2.c
@@ -47,6 +47,7 @@
 #include <linux/in.h>
 #include <linux/delay.h>
 #include <linux/if_vlan.h>
+#include <linux/mii.h>
 
 #include <asm/irq.h>
 
@@ -136,7 +137,7 @@ static const char *yukon_name[] = {
 
 
 /* Access to external PHY */
-static void gm_phy_write(struct sky2_hw *hw, unsigned port, u16 reg, u16 val)
+static int gm_phy_write(struct sky2_hw *hw, unsigned port, u16 reg, u16 val)
 {
        int i;
 
@@ -146,13 +147,15 @@ static void gm_phy_write(struct sky2_hw 
 
        for (i = 0; i < PHY_RETRIES; i++) {
                if (!(gma_read16(hw, port, GM_SMI_CTRL) & GM_SMI_CT_BUSY))
-                       return;
+                       return 0;
                udelay(1);
        }
+
        printk(KERN_WARNING PFX "%s: phy write timeout\n", hw->dev[port]->name);
+       return -ETIMEDOUT;
 }
 
-static u16 gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg)
+static int __gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg, u16 *val)
 {
        int i;
 
@@ -160,14 +163,24 @@ static u16 gm_phy_read(struct sky2_hw *h
                    | GM_SMI_CT_REG_AD(reg) | GM_SMI_CT_OP_RD);
 
        for (i = 0; i < PHY_RETRIES; i++) {
-               if (gma_read16(hw, port, GM_SMI_CTRL) & GM_SMI_CT_RD_VAL)
-                       goto ready;
+               if (gma_read16(hw, port, GM_SMI_CTRL) & GM_SMI_CT_RD_VAL) {
+                       *val = gma_read16(hw, port, GM_SMI_DATA);
+                       return 0;
+               }
+
                udelay(1);
        }
 
-       printk(KERN_WARNING PFX "%s: phy read timeout\n", hw->dev[port]->name);
-ready:
-       return gma_read16(hw, port, GM_SMI_DATA);
+       return -ETIMEDOUT;
+}
+
+static u16 gm_phy_read(struct sky2_hw *hw, unsigned port, u16 reg)
+{
+       u16 v;
+
+       if (__gm_phy_read(hw, port, reg, &v) != 0)
+               printk(KERN_WARNING PFX "%s: phy read timeout\n", 
hw->dev[port]->name);
+       return v;
 }
 
 static int sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
@@ -792,6 +805,44 @@ static void sky2_rx_clean(struct sky2_po
        }
 }
 
+/* Basic MII support */
+static int sky2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+       struct mii_ioctl_data *data = if_mii(ifr);
+       struct sky2_port *sky2 = netdev_priv(dev);
+       struct sky2_hw *hw = sky2->hw;
+       int err = -EOPNOTSUPP;
+
+       if (!netif_running(dev))
+               return -ENODEV; /* Phy still in reset */
+
+       switch(cmd) {
+       case SIOCGMIIPHY:
+               data->phy_id = PHY_ADDR_MARV;
+
+               /* fallthru */
+       case SIOCGMIIREG: {
+               u16 val = 0;
+               spin_lock_bh(&hw->phy_lock);
+               err = __gm_phy_read(hw, sky2->port, data->reg_num & 0x1f, &val);
+               spin_unlock_bh(&hw->phy_lock);
+               data->val_out = val;
+               break;
+       }
+
+       case SIOCSMIIREG:
+               if (!capable(CAP_NET_ADMIN))
+                       return -EPERM;
+
+               spin_lock_bh(&hw->phy_lock);
+               err = gm_phy_write(hw, sky2->port, data->reg_num & 0x1f,
+                                  data->val_in);
+               spin_unlock_bh(&hw->phy_lock);
+               break;
+       }
+       return err;
+}
+
 #ifdef SKY2_VLAN_TAG_USED
 static void sky2_vlan_rx_register(struct net_device *dev, struct vlan_group 
*grp)
 {
@@ -2708,8 +2759,10 @@ static __devinit struct net_device *sky2
 
        SET_MODULE_OWNER(dev);
        SET_NETDEV_DEV(dev, &hw->pdev->dev);
+       dev->irq = hw->pdev->irq;
        dev->open = sky2_up;
        dev->stop = sky2_down;
+       dev->do_ioctl = sky2_ioctl;
        dev->hard_start_xmit = sky2_xmit_frame;
        dev->get_stats = sky2_get_stats;
        dev->set_multicast_list = sky2_set_multicast;

--
Stephen Hemminger <[EMAIL PROTECTED]>
OSDL http://developer.osdl.org/~shemminger

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