+++ /dev/null
-/*
- * Marvell 88E6060 switch driver
- * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License v2 as published by the
- * Free Software Foundation
- */
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/mii.h>
-#include <linux/ethtool.h>
-#include <linux/phy.h>
-#include <linux/if_vlan.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include "mvswitch.h"
-
-/* Undefine this to use trailer mode instead.
- * I don't know if header mode works with all chips */
-#define HEADER_MODE 1
-
-MODULE_DESCRIPTION("Marvell 88E6060 Switch driver");
-MODULE_AUTHOR("Felix Fietkau");
-MODULE_LICENSE("GPL");
-
-#define MVSWITCH_MAGIC 0x88E6060
-
-struct mvswitch_priv {
- const struct net_device_ops *ndo_old;
- struct net_device_ops ndo;
- struct vlan_group *grp;
- u8 vlans[16];
-};
-
-#define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv)
-
-static inline u16
-r16(struct phy_device *phydev, int addr, int reg)
-{
- return phydev->bus->read(phydev->bus, addr, reg);
-}
-
-static inline void
-w16(struct phy_device *phydev, int addr, int reg, u16 val)
-{
- phydev->bus->write(phydev->bus, addr, reg, val);
-}
-
-
-static int
-mvswitch_mangle_tx(struct sk_buff *skb, struct net_device *dev)
-{
- struct mvswitch_priv *priv;
- char *buf = NULL;
- u16 vid;
-
- priv = dev->phy_ptr;
- if (unlikely(!priv))
- goto error;
-
- if (unlikely(skb->len < 16))
- goto error;
-
-#ifdef HEADER_MODE
- if (__vlan_hwaccel_get_tag(skb, &vid))
- goto error;
-
- if (skb_cloned(skb) || (skb->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) {
- if (pskb_expand_head(skb, MV_HEADER_SIZE, (skb->len < 62 ? 62 - skb->len : 0), GFP_ATOMIC))
- goto error_expand;
- if (skb->len < 62)
- skb->len = 62;
- }
- buf = skb_push(skb, MV_HEADER_SIZE);
-#else
- if (__vlan_get_tag(skb, &vid))
- goto error;
-
- if (unlikely((vid > 15 || !priv->vlans[vid])))
- goto error;
-
- if (skb->len <= 64) {
- if (pskb_expand_head(skb, 0, 64 + MV_TRAILER_SIZE - skb->len, GFP_ATOMIC))
- goto error_expand;
-
- buf = skb->data + 64;
- skb->len = 64 + MV_TRAILER_SIZE;
- } else {
- if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
- if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC))
- goto error_expand;
- }
- buf = skb_put(skb, 4);
- }
-
- /* move the ethernet header 4 bytes forward, overwriting the vlan tag */
- memmove(skb->data + 4, skb->data, 12);
- skb->data += 4;
- skb->len -= 4;
- skb->mac_header += 4;
-#endif
-
- if (!buf)
- goto error;
-
-
-#ifdef HEADER_MODE
- /* prepend the tag */
- *((__be16 *) buf) = cpu_to_be16(
- ((vid << MV_HEADER_VLAN_S) & MV_HEADER_VLAN_M) |
- ((priv->vlans[vid] << MV_HEADER_PORTS_S) & MV_HEADER_PORTS_M)
- );
-#else
- /* append the tag */
- *((__be32 *) buf) = cpu_to_be32((
- (MV_TRAILER_OVERRIDE << MV_TRAILER_FLAGS_S) |
- ((priv->vlans[vid] & MV_TRAILER_PORTS_M) << MV_TRAILER_PORTS_S)
- ));
-#endif
-
- return priv->ndo_old->ndo_start_xmit(skb, dev);
-
-error_expand:
- if (net_ratelimit())
- printk("%s: failed to expand/update skb for the switch\n", dev->name);
-
-error:
- /* any errors? drop the packet! */
- dev_kfree_skb_any(skb);
- return 0;
-}
-
-static int
-mvswitch_mangle_rx(struct sk_buff *skb, int napi)
-{
- struct mvswitch_priv *priv;
- struct net_device *dev;
- int vlan = -1;
- unsigned char *buf;
- int i;
-
- dev = skb->dev;
- if (!dev)
- goto error;
-
- priv = dev->phy_ptr;
- if (!priv)
- goto error;
-
- if (!priv->grp)
- goto error;
-
-#ifdef HEADER_MODE
- buf = skb->data;
- skb_pull(skb, MV_HEADER_SIZE);
-#else
- buf = skb->data + skb->len - MV_TRAILER_SIZE;
- if (buf[0] != 0x80)
- goto error;
-#endif
-
- /* look for the vlan matching the incoming port */
- for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) {
- if ((1 << buf[1]) & priv->vlans[i])
- vlan = i;
- }
-
- if (vlan == -1)
- goto error;
-
- skb->protocol = eth_type_trans(skb, skb->dev);
-
- if (napi)
- return vlan_hwaccel_receive_skb(skb, priv->grp, vlan);
- else
- return vlan_hwaccel_rx(skb, priv->grp, vlan);
-
-error:
- /* no vlan? eat the packet! */
- dev_kfree_skb_any(skb);
- return 0;
-}
-
-
-static int
-mvswitch_netif_rx(struct sk_buff *skb)
-{
- return mvswitch_mangle_rx(skb, 0);
-}
-
-static int
-mvswitch_netif_receive_skb(struct sk_buff *skb)
-{
- return mvswitch_mangle_rx(skb, 1);
-}
-
-
-static void
-mvswitch_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
-{
- struct mvswitch_priv *priv = dev->phy_ptr;
- priv->grp = grp;
-}
-
-
-static int
-mvswitch_wait_mask(struct phy_device *pdev, int addr, int reg, u16 mask, u16 val)
-{
- int i = 100;
- u16 r;
-
- do {
- r = r16(pdev, addr, reg) & mask;
- if (r == val)
- return 0;
- } while(--i > 0);
- return -ETIMEDOUT;
-}
-
-static int
-mvswitch_config_init(struct phy_device *pdev)
-{
- struct mvswitch_priv *priv = to_mvsw(pdev);
- struct net_device *dev = pdev->attached_dev;
- u8 vlmap = 0;
- int i;
-
- if (!dev)
- return -EINVAL;
-
- printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
- pdev->supported = ADVERTISED_100baseT_Full;
- pdev->advertising = ADVERTISED_100baseT_Full;
- dev->phy_ptr = priv;
- dev->irq = PHY_POLL;
-#ifdef HEADER_MODE
- dev->flags |= IFF_PROMISC;
-#endif
-
- /* initialize default vlans */
- for (i = 0; i < MV_PORTS; i++)
- priv->vlans[(i == MV_WANPORT ? 2 : 1)] |= (1 << i);
-
- /* before entering reset, disable all ports */
- for (i = 0; i < MV_PORTS; i++)
- w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
-
- msleep(2); /* wait for the status change to settle in */
-
- /* put the ATU in reset */
- w16(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET);
-
- i = mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET, 0);
- if (i < 0) {
- printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
- return i;
- }
-
- /* set the ATU flags */
- w16(pdev, MV_SWITCHREG(ATU_CTRL),
- MV_ATUCTL_NO_LEARN |
- MV_ATUCTL_ATU_1K |
- MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */
- );
-
- /* initialize the cpu port */
- w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
-#ifdef HEADER_MODE
- MV_PORTCTRL_HEADER |
-#else
- MV_PORTCTRL_RXTR |
- MV_PORTCTRL_TXTR |
-#endif
- MV_PORTCTRL_ENABLED
- );
- /* wait for the phy change to settle in */
- msleep(2);
- for (i = 0; i < MV_PORTS; i++) {
- u8 pvid = 0;
- int j;
-
- vlmap = 0;
-
- /* look for the matching vlan */
- for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
- if (priv->vlans[j] & (1 << i)) {
- vlmap = priv->vlans[j];
- pvid = j;
- }
- }
- /* leave port unconfigured if it's not part of a vlan */
- if (!vlmap)
- continue;
-
- /* add the cpu port to the allowed destinations list */
- vlmap |= (1 << MV_CPUPORT);
-
- /* take port out of its own vlan destination map */
- vlmap &= ~(1 << i);
-
- /* apply vlan settings */
- w16(pdev, MV_PORTREG(VLANMAP, i),
- MV_PORTVLAN_PORTS(vlmap) |
- MV_PORTVLAN_ID(i)
- );
-
- /* re-enable port */
- w16(pdev, MV_PORTREG(CONTROL, i),
- MV_PORTCTRL_ENABLED
- );
- }
-
- w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
- MV_PORTVLAN_ID(MV_CPUPORT)
- );
-
- /* set the port association vector */
- for (i = 0; i <= MV_PORTS; i++) {
- w16(pdev, MV_PORTREG(ASSOC, i),
- MV_PORTASSOC_PORTS(1 << i)
- );
- }
-
- /* init switch control */
- w16(pdev, MV_SWITCHREG(CTRL),
- MV_SWITCHCTL_MSIZE |
- MV_SWITCHCTL_DROP
- );
-
- /* hook into the tx function */
- priv->ndo_old = dev->netdev_ops;
- memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
- priv->ndo.ndo_start_xmit = mvswitch_mangle_tx;
- priv->ndo.ndo_vlan_rx_register = mvswitch_vlan_rx_register;
- dev->netdev_ops = &priv->ndo;
-
- pdev->pkt_align = 2;
- pdev->netif_receive_skb = mvswitch_netif_receive_skb;
- pdev->netif_rx = mvswitch_netif_rx;
-#ifdef HEADER_MODE
- dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX;
-#else
- dev->features |= NETIF_F_HW_VLAN_RX;
-#endif
-
- return 0;
-}
-
-static int
-mvswitch_read_status(struct phy_device *pdev)
-{
- pdev->speed = SPEED_100;
- pdev->duplex = DUPLEX_FULL;
- pdev->link = 1;
-
- /* XXX ugly workaround: we can't force the switch
- * to gracefully handle hosts moving from one port to another,
- * so we have to regularly clear the ATU database */
-
- /* wait for the ATU to become available */
- mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
-
- /* flush the ATU */
- w16(pdev, MV_SWITCHREG(ATU_OP),
- MV_ATUOP_INPROGRESS |
- MV_ATUOP_FLUSH_ALL
- );
-
- /* wait for operation to complete */
- mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
-
- return 0;
-}
-
-static int
-mvswitch_config_aneg(struct phy_device *phydev)
-{
- return 0;
-}
-
-static void
-mvswitch_remove(struct phy_device *pdev)
-{
- struct mvswitch_priv *priv = to_mvsw(pdev);
- struct net_device *dev = pdev->attached_dev;
-
- /* restore old netdev ops */
- if (priv->ndo_old && dev)
- dev->netdev_ops = priv->ndo_old;
- dev->phy_ptr = NULL;
- dev->features &= ~NETIF_F_HW_VLAN_RX;
- kfree(priv);
-}
-
-static int
-mvswitch_probe(struct phy_device *pdev)
-{
- struct mvswitch_priv *priv;
-
- priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
- if (priv == NULL)
- return -ENOMEM;
-
- pdev->priv = priv;
-
- return 0;
-}
-
-static int
-mvswitch_fixup(struct phy_device *dev)
-{
- u16 reg;
-
- if (dev->addr != 0x10)
- return 0;
-
- reg = dev->bus->read(dev->bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
- if (reg != MV_IDENT_VALUE)
- return 0;
-
- dev->phy_id = MVSWITCH_MAGIC;
- return 0;
-}
-
-
-static struct phy_driver mvswitch_driver = {
- .name = "Marvell 88E6060",
- .phy_id = MVSWITCH_MAGIC,
- .phy_id_mask = 0xffffffff,
- .features = PHY_BASIC_FEATURES,
- .probe = &mvswitch_probe,
- .remove = &mvswitch_remove,
- .config_init = &mvswitch_config_init,
- .config_aneg = &mvswitch_config_aneg,
- .read_status = &mvswitch_read_status,
- .driver = { .owner = THIS_MODULE,},
-};
-
-static int __init
-mvswitch_init(void)
-{
- phy_register_fixup_for_id(PHY_ANY_ID, mvswitch_fixup);
- return phy_driver_register(&mvswitch_driver);
-}
-
-static void __exit
-mvswitch_exit(void)
-{
- phy_driver_unregister(&mvswitch_driver);
-}
-
-module_init(mvswitch_init);
-module_exit(mvswitch_exit);
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