[PATCH] sky2: add MII support

Add MII ioctl interface to sky2.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 61 insertions, 8 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index d7a94d62d80f..0b9b70174168 100644
--- a/drivers/net/sky2.c
+++ b/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 *hw, unsigned port, u16 reg, u16 val)
 
         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 *hw, unsigned port, u16 reg)
                     | 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_port *sky2)
         }
 }
 
+/* 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_init_netdev(struct sky2_hw *hw,
 
         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;