+static void gem_pcs_reset(struct gem *gp)
+{
+ int limit;
+ u32 val;
+
+ /* Reset PCS unit. */
+ val = readl(gp->regs + PCS_MIICTRL);
+ val |= PCS_MIICTRL_RST;
+ writel(val, gp->regs + PCS_MIICTRL);
+
+ limit = 32;
+ while (readl(gp->regs + PCS_MIICTRL) & PCS_MIICTRL_RST) {
+ udelay(100);
+ if (limit-- <= 0)
+ break;
+ }
+ if (limit < 0)
+ printk(KERN_WARNING "%s: PCS reset bit would not clear.\n",
+ gp->dev->name);
+}
+
+static void gem_pcs_reinit_adv(struct gem *gp)
+{
+ u32 val;
+
+ /* Make sure PCS is disabled while changing advertisement
+ * configuration.
+ */
+ val = readl(gp->regs + PCS_CFG);
+ val &= ~(PCS_CFG_ENABLE | PCS_CFG_TO);
+ writel(val, gp->regs + PCS_CFG);
+
+ /* Advertise all capabilities except assymetric
+ * pause.
+ */
+ val = readl(gp->regs + PCS_MIIADV);
+ val |= (PCS_MIIADV_FD | PCS_MIIADV_HD |
+ PCS_MIIADV_SP | PCS_MIIADV_AP);
+ writel(val, gp->regs + PCS_MIIADV);
+
+ /* Enable and restart auto-negotiation, disable wrapback/loopback,
+ * and re-enable PCS.
+ */
+ val = readl(gp->regs + PCS_MIICTRL);
+ val |= (PCS_MIICTRL_RAN | PCS_MIICTRL_ANE);
+ val &= ~PCS_MIICTRL_WB;
+ writel(val, gp->regs + PCS_MIICTRL);
+
+ val = readl(gp->regs + PCS_CFG);
+ val |= PCS_CFG_ENABLE;
+ writel(val, gp->regs + PCS_CFG);
+
+ /* Make sure serialink loopback is off. The meaning
+ * of this bit is logically inverted based upon whether
+ * you are in Serialink or SERDES mode.
+ */
+ val = readl(gp->regs + PCS_SCTRL);
+ if (gp->phy_type == phy_serialink)
+ val &= ~PCS_SCTRL_LOOP;
+ else
+ val |= PCS_SCTRL_LOOP;
+ writel(val, gp->regs + PCS_SCTRL);
+}
+