405 lines
8.5 KiB
C
405 lines
8.5 KiB
C
/*
|
|
* 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"
|
|
|
|
MODULE_DESCRIPTION("Marvell 88E6060 Switch driver");
|
|
MODULE_AUTHOR("Felix Fietkau");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
struct mvswitch_priv {
|
|
/* the driver's tx function */
|
|
int (*hardstart)(struct sk_buff *skb, struct net_device *dev);
|
|
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;
|
|
struct vlan_ethhdr *eh;
|
|
char *buf = NULL;
|
|
u16 vid;
|
|
|
|
priv = dev->phy_ptr;
|
|
if (unlikely(!priv))
|
|
goto error;
|
|
|
|
if (unlikely(skb->len < 16))
|
|
goto error;
|
|
|
|
eh = (struct vlan_ethhdr *) skb->data;
|
|
if (be16_to_cpu(eh->h_vlan_proto) != 0x8100)
|
|
goto error;
|
|
|
|
vid = be16_to_cpu(eh->h_vlan_TCI) & VLAN_VID_MASK;
|
|
if (unlikely((vid > 15 || !priv->vlans[vid])))
|
|
goto error;
|
|
|
|
if (skb->len <= 64) {
|
|
if (pskb_expand_head(skb, 0, 68 - skb->len, GFP_ATOMIC)) {
|
|
if (net_ratelimit())
|
|
printk("%s: failed to expand/update skb for the switch\n", dev->name);
|
|
goto error;
|
|
}
|
|
|
|
buf = skb->data + 64;
|
|
skb->len = 68;
|
|
} else {
|
|
if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
|
|
if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC)) {
|
|
if (net_ratelimit())
|
|
printk("%s: failed to expand/update skb for the switch\n", dev->name);
|
|
goto error;
|
|
}
|
|
}
|
|
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;
|
|
|
|
if (!buf)
|
|
goto error;
|
|
|
|
/* append the tag */
|
|
*((u32 *) buf) = (
|
|
(0x80 << 24) |
|
|
((priv->vlans[vid] & 0x1f) << 16)
|
|
);
|
|
|
|
return priv->hardstart(skb, dev);
|
|
|
|
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;
|
|
|
|
buf = skb->data + skb->len - 4;
|
|
if (buf[0] != 0x80)
|
|
goto error;
|
|
|
|
/* 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;
|
|
|
|
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_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;
|
|
|
|
/* initialize default vlans */
|
|
for (i = 0; i < MV_PORTS; i++)
|
|
priv->vlans[(i == MV_WANPORT ? 1 : 0)] |= (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 device in reset and set ATU flags */
|
|
w16(pdev, MV_SWITCHREG(ATU_CTRL),
|
|
MV_ATUCTL_RESET |
|
|
MV_ATUCTL_ATU_1K |
|
|
MV_ATUCTL_AGETIME(4080) /* maximum */
|
|
);
|
|
|
|
i = 100; /* timeout */
|
|
do {
|
|
if (!(r16(pdev, MV_SWITCHREG(ATU_CTRL)) & MV_ATUCTL_RESET))
|
|
break;
|
|
msleep(1);
|
|
} while (--i > 0);
|
|
|
|
if (!i) {
|
|
printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* initialize the cpu port */
|
|
w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
|
|
MV_PORTCTRL_ENABLED |
|
|
MV_PORTCTRL_RXTR |
|
|
MV_PORTCTRL_TXTR
|
|
);
|
|
/* 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)
|
|
break;
|
|
|
|
/* 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(pvid)
|
|
);
|
|
|
|
/* re-enable port */
|
|
w16(pdev, MV_PORTREG(CONTROL, i), MV_PORTCTRL_ENABLED);
|
|
}
|
|
|
|
/* build the target list for the cpu port */
|
|
for (i = 0, vlmap = 0; i < ARRAY_SIZE(priv->vlans); i++)
|
|
vlmap |= priv->vlans[i];
|
|
|
|
w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
|
|
MV_PORTVLAN_PORTS(vlmap)
|
|
);
|
|
|
|
/* set the port association vector */
|
|
for (i = 0; i <= MV_PORTS; i++) {
|
|
w16(pdev, MV_PORTREG(ASSOC, i),
|
|
MV_PORTASSOC_PORTS(1 << i)
|
|
);
|
|
}
|
|
|
|
/* hook into the tx function */
|
|
priv->hardstart = dev->hard_start_xmit;
|
|
pdev->netif_receive_skb = mvswitch_netif_receive_skb;
|
|
pdev->netif_rx = mvswitch_netif_rx;
|
|
dev->hard_start_xmit = mvswitch_mangle_tx;
|
|
dev->vlan_rx_register = mvswitch_vlan_rx_register;
|
|
dev->features |= NETIF_F_HW_VLAN_RX;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
mvswitch_read_status(struct phy_device *phydev)
|
|
{
|
|
phydev->speed = SPEED_100;
|
|
phydev->duplex = DUPLEX_FULL;
|
|
phydev->state = PHY_UP;
|
|
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 xmit handler */
|
|
if (priv->hardstart && dev)
|
|
dev->hard_start_xmit = priv->hardstart;
|
|
dev->vlan_rx_register = NULL;
|
|
dev->vlan_rx_kill_vid = NULL;
|
|
dev->phy_ptr = NULL;
|
|
dev->features &= ~NETIF_F_HW_VLAN_RX;
|
|
kfree(priv);
|
|
}
|
|
|
|
static bool
|
|
mvswitch_detect(struct mii_bus *bus, int addr)
|
|
{
|
|
u16 reg;
|
|
int i;
|
|
|
|
/* we attach to phy id 31 to make sure that the late probe works */
|
|
if (addr != 31)
|
|
return false;
|
|
|
|
/* look for the switch on the bus */
|
|
reg = bus->read(bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
|
|
if (reg != MV_IDENT_VALUE)
|
|
return false;
|
|
|
|
/*
|
|
* Now that we've established that the switch actually exists, let's
|
|
* get rid of the competition :)
|
|
*/
|
|
for (i = 0; i < 31; i++) {
|
|
if (!bus->phy_map[i])
|
|
continue;
|
|
|
|
device_unregister(&bus->phy_map[i]->dev);
|
|
kfree(bus->phy_map[i]);
|
|
bus->phy_map[i] = NULL;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
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 struct phy_driver mvswitch_driver = {
|
|
.name = "Marvell 88E6060",
|
|
.features = PHY_BASIC_FEATURES,
|
|
.detect = &mvswitch_detect,
|
|
.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)
|
|
{
|
|
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);
|