2 * Marvell 88E6060 switch driver
3 * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License v2 as published by the
7 * Free Software Foundation
9 #include <linux/kernel.h>
10 #include <linux/string.h>
11 #include <linux/errno.h>
12 #include <linux/unistd.h>
13 #include <linux/slab.h>
14 #include <linux/interrupt.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/skbuff.h>
20 #include <linux/spinlock.h>
22 #include <linux/module.h>
23 #include <linux/mii.h>
24 #include <linux/ethtool.h>
25 #include <linux/phy.h>
26 #include <linux/if_vlan.h>
30 #include <asm/uaccess.h>
33 /* Undefine this to use trailer mode instead.
34 * I don't know if header mode works with all chips */
37 MODULE_DESCRIPTION("Marvell 88E6060 Switch driver");
38 MODULE_AUTHOR("Felix Fietkau");
39 MODULE_LICENSE("GPL");
41 #define MVSWITCH_MAGIC 0x88E6060
43 struct mvswitch_priv {
44 const struct net_device_ops *ndo_old;
45 struct net_device_ops ndo;
46 struct vlan_group *grp;
50 #define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv)
53 r16(struct phy_device *phydev, int addr, int reg)
55 return phydev->bus->read(phydev->bus, addr, reg);
59 w16(struct phy_device *phydev, int addr, int reg, u16 val)
61 phydev->bus->write(phydev->bus, addr, reg, val);
66 mvswitch_mangle_tx(struct sk_buff *skb, struct net_device *dev)
68 struct mvswitch_priv *priv;
76 if (unlikely(skb->len < 16))
80 if (__vlan_hwaccel_get_tag(skb, &vid))
83 if (skb_cloned(skb) || (skb->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) {
84 if (pskb_expand_head(skb, MV_HEADER_SIZE, (skb->len < 62 ? 62 - skb->len : 0), GFP_ATOMIC))
89 buf = skb_push(skb, MV_HEADER_SIZE);
91 if (__vlan_get_tag(skb, &vid))
94 if (unlikely((vid > 15 || !priv->vlans[vid])))
98 if (pskb_expand_head(skb, 0, 64 + MV_TRAILER_SIZE - skb->len, GFP_ATOMIC))
101 buf = skb->data + 64;
102 skb->len = 64 + MV_TRAILER_SIZE;
104 if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
105 if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC))
108 buf = skb_put(skb, 4);
111 /* move the ethernet header 4 bytes forward, overwriting the vlan tag */
112 memmove(skb->data + 4, skb->data, 12);
115 skb->mac_header += 4;
123 /* prepend the tag */
124 *((__be16 *) buf) = cpu_to_be16(
125 ((vid << MV_HEADER_VLAN_S) & MV_HEADER_VLAN_M) |
126 ((priv->vlans[vid] << MV_HEADER_PORTS_S) & MV_HEADER_PORTS_M)
130 *((__be32 *) buf) = cpu_to_be32((
131 (MV_TRAILER_OVERRIDE << MV_TRAILER_FLAGS_S) |
132 ((priv->vlans[vid] & MV_TRAILER_PORTS_M) << MV_TRAILER_PORTS_S)
136 return priv->ndo_old->ndo_start_xmit(skb, dev);
140 printk("%s: failed to expand/update skb for the switch\n", dev->name);
143 /* any errors? drop the packet! */
144 dev_kfree_skb_any(skb);
149 mvswitch_mangle_rx(struct sk_buff *skb, int napi)
151 struct mvswitch_priv *priv;
152 struct net_device *dev;
170 skb_pull(skb, MV_HEADER_SIZE);
172 buf = skb->data + skb->len - MV_TRAILER_SIZE;
177 /* look for the vlan matching the incoming port */
178 for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) {
179 if ((1 << buf[1]) & priv->vlans[i])
186 skb->protocol = eth_type_trans(skb, skb->dev);
189 return vlan_hwaccel_receive_skb(skb, priv->grp, vlan);
191 return vlan_hwaccel_rx(skb, priv->grp, vlan);
194 /* no vlan? eat the packet! */
195 dev_kfree_skb_any(skb);
201 mvswitch_netif_rx(struct sk_buff *skb)
203 return mvswitch_mangle_rx(skb, 0);
207 mvswitch_netif_receive_skb(struct sk_buff *skb)
209 return mvswitch_mangle_rx(skb, 1);
214 mvswitch_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
216 struct mvswitch_priv *priv = dev->phy_ptr;
222 mvswitch_wait_mask(struct phy_device *pdev, int addr, int reg, u16 mask, u16 val)
228 r = r16(pdev, addr, reg) & mask;
236 mvswitch_config_init(struct phy_device *pdev)
238 struct mvswitch_priv *priv = to_mvsw(pdev);
239 struct net_device *dev = pdev->attached_dev;
246 printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
247 pdev->supported = ADVERTISED_100baseT_Full;
248 pdev->advertising = ADVERTISED_100baseT_Full;
252 /* initialize default vlans */
253 for (i = 0; i < MV_PORTS; i++)
254 priv->vlans[(i == MV_WANPORT ? 2 : 1)] |= (1 << i);
256 /* before entering reset, disable all ports */
257 for (i = 0; i < MV_PORTS; i++)
258 w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
260 msleep(2); /* wait for the status change to settle in */
262 /* put the ATU in reset */
263 w16(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET);
265 i = mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET, 0);
267 printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
271 /* set the ATU flags */
272 w16(pdev, MV_SWITCHREG(ATU_CTRL),
275 MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */
278 /* initialize the cpu port */
279 w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
288 /* wait for the phy change to settle in */
290 for (i = 0; i < MV_PORTS; i++) {
296 /* look for the matching vlan */
297 for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
298 if (priv->vlans[j] & (1 << i)) {
299 vlmap = priv->vlans[j];
303 /* leave port unconfigured if it's not part of a vlan */
307 /* add the cpu port to the allowed destinations list */
308 vlmap |= (1 << MV_CPUPORT);
310 /* take port out of its own vlan destination map */
313 /* apply vlan settings */
314 w16(pdev, MV_PORTREG(VLANMAP, i),
315 MV_PORTVLAN_PORTS(vlmap) |
320 w16(pdev, MV_PORTREG(CONTROL, i),
325 w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
326 MV_PORTVLAN_ID(MV_CPUPORT)
329 /* set the port association vector */
330 for (i = 0; i <= MV_PORTS; i++) {
331 w16(pdev, MV_PORTREG(ASSOC, i),
332 MV_PORTASSOC_PORTS(1 << i)
336 /* init switch control */
337 w16(pdev, MV_SWITCHREG(CTRL),
342 /* hook into the tx function */
343 priv->ndo_old = dev->netdev_ops;
344 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
345 priv->ndo.ndo_start_xmit = mvswitch_mangle_tx;
346 priv->ndo.ndo_vlan_rx_register = mvswitch_vlan_rx_register;
347 dev->netdev_ops = &priv->ndo;
350 pdev->netif_receive_skb = mvswitch_netif_receive_skb;
351 pdev->netif_rx = mvswitch_netif_rx;
353 dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX;
355 dev->features |= NETIF_F_HW_VLAN_RX;
362 mvswitch_read_status(struct phy_device *pdev)
364 pdev->speed = SPEED_100;
365 pdev->duplex = DUPLEX_FULL;
366 pdev->state = PHY_UP;
368 /* XXX ugly workaround: we can't force the switch
369 * to gracefully handle hosts moving from one port to another,
370 * so we have to regularly clear the ATU database */
372 /* wait for the ATU to become available */
373 mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
376 w16(pdev, MV_SWITCHREG(ATU_OP),
377 MV_ATUOP_INPROGRESS |
381 /* wait for operation to complete */
382 mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
388 mvswitch_config_aneg(struct phy_device *phydev)
394 mvswitch_remove(struct phy_device *pdev)
396 struct mvswitch_priv *priv = to_mvsw(pdev);
397 struct net_device *dev = pdev->attached_dev;
399 /* restore old netdev ops */
400 if (priv->ndo_old && dev)
401 dev->netdev_ops = priv->ndo_old;
402 dev->vlan_rx_register = NULL;
403 dev->vlan_rx_kill_vid = NULL;
405 dev->features &= ~NETIF_F_HW_VLAN_RX;
410 mvswitch_probe(struct phy_device *pdev)
412 struct mvswitch_priv *priv;
414 priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
424 mvswitch_fixup(struct phy_device *dev)
428 if (dev->addr != 0x10)
431 reg = dev->bus->read(dev->bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
432 if (reg != MV_IDENT_VALUE)
435 dev->phy_id = MVSWITCH_MAGIC;
440 static struct phy_driver mvswitch_driver = {
441 .name = "Marvell 88E6060",
442 .phy_id = MVSWITCH_MAGIC,
443 .phy_id_mask = 0xffffffff,
444 .features = PHY_BASIC_FEATURES,
445 .probe = &mvswitch_probe,
446 .remove = &mvswitch_remove,
447 .config_init = &mvswitch_config_init,
448 .config_aneg = &mvswitch_config_aneg,
449 .read_status = &mvswitch_read_status,
450 .driver = { .owner = THIS_MODULE,},
456 phy_register_fixup_for_id(PHY_ANY_ID, mvswitch_fixup);
457 return phy_driver_register(&mvswitch_driver);
463 phy_driver_unregister(&mvswitch_driver);
466 module_init(mvswitch_init);
467 module_exit(mvswitch_exit);