[PATCH] FS_ENET: use PAL for mii management

This patch should update the fs_enet infrastructure to utilize Phy Abstraction
Layer subsystem.  Along with the above, there are apparent bugfixes, overhaul
and improvements.

Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

11 files changed, 711 insertions, 1049 deletions

diff --git a/drivers/net/fs_enet/Makefile b/drivers/net/fs_enet/Makefile
index d6dd3f2fb43e..02d4dc18ba69 100644
--- a/drivers/net/fs_enet/Makefile
+++ b/drivers/net/fs_enet/Makefile
@@ -4,7 +4,7 @@
 
 obj-$(CONFIG_FS_ENET) += fs_enet.o
 
-obj-$(CONFIG_8xx) += mac-fec.o mac-scc.o
-obj-$(CONFIG_8260) += mac-fcc.o
+obj-$(CONFIG_8xx) += mac-fec.o mac-scc.o mii-fec.o
+obj-$(CONFIG_CPM2) += mac-fcc.o mii-bitbang.o
 
-fs_enet-objs := fs_enet-main.o fs_enet-mii.o mii-bitbang.o mii-fixed.o
+fs_enet-objs := fs_enet-main.o
diff --git a/drivers/net/fs_enet/fec.h b/drivers/net/fs_enet/fec.h
new file mode 100644
index 000000000000..e980527e2b99
--- /dev/null
+++ b/drivers/net/fs_enet/fec.h
@@ -0,0 +1,42 @@
+#ifndef FS_ENET_FEC_H
+#define FS_ENET_FEC_H
+
+/* CRC polynomium used by the FEC for the multicast group filtering */
+#define FEC_CRC_POLY   0x04C11DB7
+
+#define FEC_MAX_MULTICAST_ADDRS 64
+
+/* Interrupt events/masks.
+*/
+#define FEC_ENET_HBERR  0x80000000U     /* Heartbeat error          */
+#define FEC_ENET_BABR   0x40000000U     /* Babbling receiver        */
+#define FEC_ENET_BABT   0x20000000U     /* Babbling transmitter     */
+#define FEC_ENET_GRA    0x10000000U     /* Graceful stop complete   */
+#define FEC_ENET_TXF    0x08000000U     /* Full frame transmitted   */
+#define FEC_ENET_TXB    0x04000000U     /* A buffer was transmitted */
+#define FEC_ENET_RXF    0x02000000U     /* Full frame received      */
+#define FEC_ENET_RXB    0x01000000U     /* A buffer was received    */
+#define FEC_ENET_MII    0x00800000U     /* MII interrupt            */
+#define FEC_ENET_EBERR  0x00400000U     /* SDMA bus error           */
+
+#define FEC_ECNTRL_PINMUX       0x00000004
+#define FEC_ECNTRL_ETHER_EN     0x00000002
+#define FEC_ECNTRL_RESET        0x00000001
+
+#define FEC_RCNTRL_BC_REJ       0x00000010
+#define FEC_RCNTRL_PROM         0x00000008
+#define FEC_RCNTRL_MII_MODE     0x00000004
+#define FEC_RCNTRL_DRT          0x00000002
+#define FEC_RCNTRL_LOOP         0x00000001
+
+#define FEC_TCNTRL_FDEN         0x00000004
+#define FEC_TCNTRL_HBC          0x00000002
+#define FEC_TCNTRL_GTS          0x00000001
+
+
+
+/*
+ * Delay to wait for FEC reset command to complete (in us)
+ */
+#define FEC_RESET_DELAY         50
+#endif
diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index f6abff5846b3..df62506a1787 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -37,6 +37,7 @@
 #include <linux/bitops.h>
 #include <linux/fs.h>
 #include <linux/platform_device.h>
+#include <linux/phy.h>
 
 #include <linux/vmalloc.h>
 #include <asm/pgtable.h>
@@ -682,35 +683,6 @@ static void fs_free_irq(struct net_device *dev, int irq)
         (*fep->ops->post_free_irq)(dev, irq);
 }
 
-/**********************************************************************************/
-
-/* This interrupt occurs when the PHY detects a link change. */
-static irqreturn_t
-fs_mii_link_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
-        struct net_device *dev = dev_id;
-        struct fs_enet_private *fep;
-        const struct fs_platform_info *fpi;
-
-        fep = netdev_priv(dev);
-        fpi = fep->fpi;
-
-        /*
-         * Acknowledge the interrupt if possible. If we have not
-         * found the PHY yet we can't process or acknowledge the
-         * interrupt now. Instead we ignore this interrupt for now,
-         * which we can do since it is edge triggered. It will be
-         * acknowledged later by fs_enet_open().
-         */
-        if (!fep->phy)
-                return IRQ_NONE;
-
-        fs_mii_ack_int(dev);
-        fs_mii_link_status_change_check(dev, 0);
-
-        return IRQ_HANDLED;
-}
-
 static void fs_timeout(struct net_device *dev)
 {
         struct fs_enet_private *fep = netdev_priv(dev);
@@ -722,10 +694,13 @@ static void fs_timeout(struct net_device *dev)
         spin_lock_irqsave(&fep->lock, flags);
 
         if (dev->flags & IFF_UP) {
+                phy_stop(fep->phydev);
                 (*fep->ops->stop)(dev);
                 (*fep->ops->restart)(dev);
+                phy_start(fep->phydev);
         }
 
+        phy_start(fep->phydev);
         wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
         spin_unlock_irqrestore(&fep->lock, flags);
 
@@ -733,35 +708,112 @@ static void fs_timeout(struct net_device *dev)
                 netif_wake_queue(dev);
 }
 
+/*-----------------------------------------------------------------------------
+ *  generic link-change handler - should be sufficient for most cases
+ *-----------------------------------------------------------------------------*/
+static void generic_adjust_link(struct  net_device *dev)
+{
+       struct fs_enet_private *fep = netdev_priv(dev);
+       struct phy_device *phydev = fep->phydev;
+       int new_state = 0;
+
+       if (phydev->link) {
+
+               /* adjust to duplex mode */
+               if (phydev->duplex != fep->oldduplex){
+                       new_state = 1;
+                       fep->oldduplex = phydev->duplex;
+               }
+
+               if (phydev->speed != fep->oldspeed) {
+                       new_state = 1;
+                       fep->oldspeed = phydev->speed;
+               }
+
+               if (!fep->oldlink) {
+                       new_state = 1;
+                       fep->oldlink = 1;
+                       netif_schedule(dev);
+                       netif_carrier_on(dev);
+                       netif_start_queue(dev);
+               }
+
+               if (new_state)
+                       fep->ops->restart(dev);
+
+       } else if (fep->oldlink) {
+               new_state = 1;
+               fep->oldlink = 0;
+               fep->oldspeed = 0;
+               fep->oldduplex = -1;
+               netif_carrier_off(dev);
+               netif_stop_queue(dev);
+       }
+
+       if (new_state && netif_msg_link(fep))
+               phy_print_status(phydev);
+}
+