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@@ -0,0 +1,405 @@
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+/*
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+ * Marvell 88E6060 switch driver
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+ * Copyright (c) 2008 Felix Fietkau <[email protected]>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License v2 as published by the
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+ * Free Software Foundation
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+ */
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+#include <linux/kernel.h>
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+#include <linux/string.h>
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+#include <linux/errno.h>
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+#include <linux/unistd.h>
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+#include <linux/slab.h>
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+#include <linux/interrupt.h>
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+#include <linux/init.h>
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+#include <linux/delay.h>
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+#include <linux/netdevice.h>
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+#include <linux/etherdevice.h>
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+#include <linux/skbuff.h>
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+#include <linux/spinlock.h>
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+#include <linux/mm.h>
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+#include <linux/module.h>
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+#include <linux/mii.h>
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+#include <linux/ethtool.h>
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+#include <linux/phy.h>
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+#include <linux/if_vlan.h>
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+
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+#include <asm/io.h>
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+#include <asm/irq.h>
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+#include <asm/uaccess.h>
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+#include "mvswitch.h"
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+
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+MODULE_DESCRIPTION("Marvell 88E6060 Switch driver");
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+MODULE_AUTHOR("Felix Fietkau");
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+MODULE_LICENSE("GPL");
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+
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+struct mvswitch_priv {
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+ /* the driver's tx function */
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+ int (*hardstart)(struct sk_buff *skb, struct net_device *dev);
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+ struct vlan_group *grp;
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+ u8 vlans[16];
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+};
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+
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+#define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv)
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+
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+static inline u16
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+r16(struct phy_device *phydev, int addr, int reg)
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+{
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+ return phydev->bus->read(phydev->bus, addr, reg);
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+}
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+
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+static inline void
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+w16(struct phy_device *phydev, int addr, int reg, u16 val)
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+{
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+ phydev->bus->write(phydev->bus, addr, reg, val);
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+}
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+
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+static int
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+mvswitch_mangle_tx(struct sk_buff *skb, struct net_device *dev)
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+{
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+ struct mvswitch_priv *priv;
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+ struct vlan_ethhdr *eh;
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+ char *buf = NULL;
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+ u16 vid;
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+
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+ priv = dev->phy_ptr;
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+ if (unlikely(!priv))
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+ goto error;
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+
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+ if (unlikely(skb->len < 16))
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+ goto error;
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+
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+ eh = (struct vlan_ethhdr *) skb->data;
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+ if (be16_to_cpu(eh->h_vlan_proto) != 0x8100)
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+ goto error;
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+
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+ vid = be16_to_cpu(eh->h_vlan_TCI) & VLAN_VID_MASK;
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+ if (unlikely((vid > 15 || !priv->vlans[vid])))
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+ goto error;
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+
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+ if (skb->len <= 64) {
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+ if (pskb_expand_head(skb, 0, 68 - skb->len, GFP_ATOMIC)) {
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+ if (net_ratelimit())
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+ printk("%s: failed to expand/update skb for the switch\n", dev->name);
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+ goto error;
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+ }
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+
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+ buf = skb->data + 64;
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+ skb->len = 68;
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+ } else {
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+ if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
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+ if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC)) {
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+ if (net_ratelimit())
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+ printk("%s: failed to expand/update skb for the switch\n", dev->name);
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+ goto error;
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+ }
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+ }
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+ buf = skb_put(skb, 4);
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+ }
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+
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+ /* move the ethernet header 4 bytes forward, overwriting the vlan tag */
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+ memmove(skb->data + 4, skb->data, 12);
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+ skb->data += 4;
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+ skb->len -= 4;
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+ skb->mac_header += 4;
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+
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+ if (!buf)
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+ goto error;
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+
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+ /* append the tag */
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+ *((u32 *) buf) = (
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+ (0x80 << 24) |
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+ ((priv->vlans[vid] & 0x1f) << 16)
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+ );
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+
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+ return priv->hardstart(skb, dev);
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+
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+error:
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+ /* any errors? drop the packet! */
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+ dev_kfree_skb_any(skb);
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+ return 0;
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+}
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+
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+static int
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+mvswitch_mangle_rx(struct sk_buff *skb, int napi)
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+{
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+ struct mvswitch_priv *priv;
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+ struct net_device *dev;
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+ int vlan = -1;
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+ unsigned char *buf;
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+ int i;
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+
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+ dev = skb->dev;
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+ if (!dev)
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+ goto error;
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+
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+ priv = dev->phy_ptr;
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+ if (!priv)
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+ goto error;
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+
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+ if (!priv->grp)
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+ goto error;
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+
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+ buf = skb->data + skb->len - 4;
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+ if (buf[0] != 0x80)
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+ goto error;
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+
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+ /* look for the vlan matching the incoming port */
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+ for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) {
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+ if ((1 << buf[1]) & priv->vlans[i])
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+ vlan = i;
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+ }
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+
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+ if (vlan == -1)
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+ goto error;
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+
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+ if (napi)
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+ return vlan_hwaccel_receive_skb(skb, priv->grp, vlan);
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+ else
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+ return vlan_hwaccel_rx(skb, priv->grp, vlan);
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+
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+error:
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+ /* no vlan? eat the packet! */
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+ dev_kfree_skb_any(skb);
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+ return 0;
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+}
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+
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+
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+static int
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+mvswitch_netif_rx(struct sk_buff *skb)
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+{
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+ return mvswitch_mangle_rx(skb, 0);
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+}
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+
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+static int
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+mvswitch_netif_receive_skb(struct sk_buff *skb)
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+{
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+ return mvswitch_mangle_rx(skb, 1);
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+}
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+
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+
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+static void
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+mvswitch_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
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+{
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+ struct mvswitch_priv *priv = dev->phy_ptr;
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+ priv->grp = grp;
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+}
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+
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+
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+static int
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+mvswitch_config_init(struct phy_device *pdev)
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+{
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+ struct mvswitch_priv *priv = to_mvsw(pdev);
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+ struct net_device *dev = pdev->attached_dev;
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+ u8 vlmap = 0;
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+ int i;
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+
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+ if (!dev)
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+ return -EINVAL;
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+
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+ printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
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+ pdev->supported = ADVERTISED_100baseT_Full;
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+ pdev->advertising = ADVERTISED_100baseT_Full;
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+ dev->phy_ptr = priv;
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+
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+ /* initialize default vlans */
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+ for (i = 0; i < MV_PORTS; i++)
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+ priv->vlans[(i == MV_WANPORT ? 1 : 0)] |= (1 << i);
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+
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+ /* before entering reset, disable all ports */
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+ for (i = 0; i < MV_PORTS; i++)
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+ w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
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+
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+ msleep(2); /* wait for the status change to settle in */
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+
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+ /* put the device in reset and set ATU flags */
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+ w16(pdev, MV_SWITCHREG(ATU_CTRL),
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+ MV_ATUCTL_RESET |
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+ MV_ATUCTL_ATU_1K |
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+ MV_ATUCTL_AGETIME(4080) /* maximum */
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+ );
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+
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+ i = 100; /* timeout */
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+ do {
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+ if (!(r16(pdev, MV_SWITCHREG(ATU_CTRL)) & MV_ATUCTL_RESET))
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+ break;
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+ msleep(1);
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+ } while (--i > 0);
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+
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+ if (!i) {
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+ printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
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+ return -ETIMEDOUT;
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+ }
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+
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+ /* initialize the cpu port */
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+ w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
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+ MV_PORTCTRL_ENABLED |
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+ MV_PORTCTRL_VLANTUN |
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+ MV_PORTCTRL_RXTR |
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+ MV_PORTCTRL_TXTR
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+ );
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+ /* wait for the phy change to settle in */
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+ msleep(2);
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+ for (i = 0; i < MV_PORTS; i++) {
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+ u8 pvid = 0;
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+ int j;
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+
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+ vlmap = 0;
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+
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+ /* look for the matching vlan */
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+ for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
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+ if (priv->vlans[j] & (1 << i)) {
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+ vlmap = priv->vlans[j];
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+ pvid = j;
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+ }
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+ }
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+ /* leave port unconfigured if it's not part of a vlan */
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+ if (!vlmap)
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+ break;
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+
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+ /* add the cpu port to the allowed destinations list */
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+ vlmap |= (1 << MV_CPUPORT);
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+
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+ /* take port out of its own vlan destination map */
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+ vlmap &= ~(1 << i);
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+
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+ /* apply vlan settings */
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+ w16(pdev, MV_PORTREG(VLANMAP, i),
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+ MV_PORTVLAN_PORTS(vlmap) |
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+ MV_PORTVLAN_ID(pvid)
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+ );
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+
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+ /* re-enable port */
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+ w16(pdev, MV_PORTREG(CONTROL, i), MV_PORTCTRL_ENABLED);
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+ }
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+
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+ /* build the target list for the cpu port */
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+ for (i = 0, vlmap = 0; i < ARRAY_SIZE(priv->vlans); i++)
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+ vlmap |= priv->vlans[i];
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+
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+ w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
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+ MV_PORTVLAN_PORTS(vlmap)
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+ );
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+
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+ /* set the port association vector */
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+ for (i = 0; i <= MV_PORTS; i++) {
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+ w16(pdev, MV_PORTREG(ASSOC, i),
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+ MV_PORTASSOC_PORTS(1 << i)
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+ );
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+ }
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+
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+ /* hook into the tx function */
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+ priv->hardstart = dev->hard_start_xmit;
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+ pdev->netif_receive_skb = mvswitch_netif_receive_skb;
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+ pdev->netif_rx = mvswitch_netif_rx;
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+ dev->hard_start_xmit = mvswitch_mangle_tx;
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+ dev->vlan_rx_register = mvswitch_vlan_rx_register;
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+ dev->features |= NETIF_F_HW_VLAN_RX;
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+
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+ return 0;
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+}
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+
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+static int
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+mvswitch_read_status(struct phy_device *phydev)
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+{
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+ phydev->speed = SPEED_100;
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+ phydev->duplex = DUPLEX_FULL;
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+ phydev->state = PHY_UP;
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+ return 0;
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+}
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+
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+static int
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+mvswitch_config_aneg(struct phy_device *phydev)
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+{
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+ return 0;
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+}
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+
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+static void
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+mvswitch_remove(struct phy_device *pdev)
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+{
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+ struct mvswitch_priv *priv = to_mvsw(pdev);
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+ struct net_device *dev = pdev->attached_dev;
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+
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+ /* restore old xmit handler */
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+ if (priv->hardstart && dev)
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+ dev->hard_start_xmit = priv->hardstart;
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+ dev->vlan_rx_register = NULL;
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+ dev->vlan_rx_kill_vid = NULL;
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+ dev->phy_ptr = NULL;
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+ dev->features &= ~NETIF_F_HW_VLAN_RX;
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+ kfree(priv);
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+}
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+
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+static bool
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+mvswitch_detect(struct mii_bus *bus, int addr)
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+{
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+ u16 reg;
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+ int i;
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+
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+ /* we attach to phy id 31 to make sure that the late probe works */
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+ if (addr != 31)
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+ return false;
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+
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+ /* look for the switch on the bus */
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+ reg = bus->read(bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
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+ if (reg != MV_IDENT_VALUE)
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+ return false;
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+
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+ /*
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+ * Now that we've established that the switch actually exists, let's
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+ * get rid of the competition :)
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+ */
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+ for (i = 0; i < 31; i++) {
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+ if (!bus->phy_map[i])
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+ continue;
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+
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+ device_unregister(&bus->phy_map[i]->dev);
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+ kfree(bus->phy_map[i]);
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+ bus->phy_map[i] = NULL;
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+ }
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+
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+ return true;
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+}
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+
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+static int
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+mvswitch_probe(struct phy_device *pdev)
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+{
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+ struct mvswitch_priv *priv;
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+
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+ priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
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+ if (priv == NULL)
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+ return -ENOMEM;
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+
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+ pdev->priv = priv;
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+
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+ return 0;
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+}
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+
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+
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+static struct phy_driver mvswitch_driver = {
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+ .name = "Marvell 88E6060",
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+ .features = PHY_BASIC_FEATURES,
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+ .detect = &mvswitch_detect,
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+ .probe = &mvswitch_probe,
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+ .remove = &mvswitch_remove,
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+ .config_init = &mvswitch_config_init,
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+ .config_aneg = &mvswitch_config_aneg,
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+ .read_status = &mvswitch_read_status,
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+ .driver = { .owner = THIS_MODULE,},
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+};
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+
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+static int __init
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+mvswitch_init(void)
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+{
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+ return phy_driver_register(&mvswitch_driver);
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+}
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+
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+static void __exit
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+mvswitch_exit(void)
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+{
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+ phy_driver_unregister(&mvswitch_driver);
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+}
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+
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+module_init(mvswitch_init);
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+module_exit(mvswitch_exit);
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Felix Fietkau