2 * Marvell 88E6060 switch driver
3 * Copyright (c) 2008 Felix Fietkau <nbd@nbd.name>
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 netdev_features_t orig_features;
48 #define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv)
51 r16(struct phy_device *phydev, int addr, int reg)
53 struct mii_bus *bus = phydev->mdio.bus;
55 return bus->read(bus, addr, reg);
59 w16(struct phy_device *phydev, int addr, int reg, u16 val)
61 struct mii_bus *bus = phydev->mdio.bus;
63 bus->write(bus, addr, reg, val);
67 static struct sk_buff *
68 mvswitch_mangle_tx(struct net_device *dev, struct sk_buff *skb)
70 struct mvswitch_priv *priv;
78 if (unlikely(skb->len < 16))
82 if (__vlan_hwaccel_get_tag(skb, &vid))
85 if (skb_cloned(skb) || (skb->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) {
86 if (pskb_expand_head(skb, MV_HEADER_SIZE, (skb->len < 62 ? 62 - skb->len : 0), GFP_ATOMIC))
91 buf = skb_push(skb, MV_HEADER_SIZE);
93 if (__vlan_get_tag(skb, &vid))
96 if (unlikely((vid > 15 || !priv->vlans[vid])))
100 if (pskb_expand_head(skb, 0, 64 + MV_TRAILER_SIZE - skb->len, GFP_ATOMIC))
103 buf = skb->data + 64;
104 skb->len = 64 + MV_TRAILER_SIZE;
106 if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
107 if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC))
110 buf = skb_put(skb, 4);
113 /* move the ethernet header 4 bytes forward, overwriting the vlan tag */
114 memmove(skb->data + 4, skb->data, 12);
117 skb->mac_header += 4;
125 /* prepend the tag */
126 *((__be16 *) buf) = cpu_to_be16(
127 ((vid << MV_HEADER_VLAN_S) & MV_HEADER_VLAN_M) |
128 ((priv->vlans[vid] << MV_HEADER_PORTS_S) & MV_HEADER_PORTS_M)
132 *((__be32 *) buf) = cpu_to_be32((
133 (MV_TRAILER_OVERRIDE << MV_TRAILER_FLAGS_S) |
134 ((priv->vlans[vid] & MV_TRAILER_PORTS_M) << MV_TRAILER_PORTS_S)
142 printk("%s: failed to expand/update skb for the switch\n", dev->name);
145 /* any errors? drop the packet! */
146 dev_kfree_skb_any(skb);
151 mvswitch_mangle_rx(struct net_device *dev, struct sk_buff *skb)
153 struct mvswitch_priv *priv;
159 if (WARN_ON_ONCE(!priv))
164 skb_pull(skb, MV_HEADER_SIZE);
166 buf = skb->data + skb->len - MV_TRAILER_SIZE;
171 /* look for the vlan matching the incoming port */
172 for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) {
173 if ((1 << buf[1]) & priv->vlans[i])
180 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
185 mvswitch_wait_mask(struct phy_device *pdev, int addr, int reg, u16 mask, u16 val)
191 r = r16(pdev, addr, reg) & mask;
199 mvswitch_config_init(struct phy_device *pdev)
201 struct mvswitch_priv *priv = to_mvsw(pdev);
202 struct net_device *dev = pdev->attached_dev;
209 printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
210 pdev->supported = ADVERTISED_100baseT_Full;
211 pdev->advertising = ADVERTISED_100baseT_Full;
213 pdev->irq = PHY_POLL;
215 dev->flags |= IFF_PROMISC;
218 /* initialize default vlans */
219 for (i = 0; i < MV_PORTS; i++)
220 priv->vlans[(i == MV_WANPORT ? 2 : 1)] |= (1 << i);
222 /* before entering reset, disable all ports */
223 for (i = 0; i < MV_PORTS; i++)
224 w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
226 msleep(2); /* wait for the status change to settle in */
228 /* put the ATU in reset */
229 w16(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET);
231 i = mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET, 0);
233 printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
237 /* set the ATU flags */
238 w16(pdev, MV_SWITCHREG(ATU_CTRL),
241 MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */
244 /* initialize the cpu port */
245 w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
254 /* wait for the phy change to settle in */
256 for (i = 0; i < MV_PORTS; i++) {
262 /* look for the matching vlan */
263 for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
264 if (priv->vlans[j] & (1 << i)) {
265 vlmap = priv->vlans[j];
269 /* leave port unconfigured if it's not part of a vlan */
273 /* add the cpu port to the allowed destinations list */
274 vlmap |= (1 << MV_CPUPORT);
276 /* take port out of its own vlan destination map */
279 /* apply vlan settings */
280 w16(pdev, MV_PORTREG(VLANMAP, i),
281 MV_PORTVLAN_PORTS(vlmap) |
286 w16(pdev, MV_PORTREG(CONTROL, i),
291 w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
292 MV_PORTVLAN_ID(MV_CPUPORT)
295 /* set the port association vector */
296 for (i = 0; i <= MV_PORTS; i++) {
297 w16(pdev, MV_PORTREG(ASSOC, i),
298 MV_PORTASSOC_PORTS(1 << i)
302 /* init switch control */
303 w16(pdev, MV_SWITCHREG(CTRL),
308 dev->eth_mangle_rx = mvswitch_mangle_rx;
309 dev->eth_mangle_tx = mvswitch_mangle_tx;
310 priv->orig_features = dev->features;
313 dev->priv_flags |= IFF_NO_IP_ALIGN;
314 dev->features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX;
316 dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
323 mvswitch_read_status(struct phy_device *pdev)
325 pdev->speed = SPEED_100;
326 pdev->duplex = DUPLEX_FULL;
329 /* XXX ugly workaround: we can't force the switch
330 * to gracefully handle hosts moving from one port to another,
331 * so we have to regularly clear the ATU database */
333 /* wait for the ATU to become available */
334 mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
337 w16(pdev, MV_SWITCHREG(ATU_OP),
338 MV_ATUOP_INPROGRESS |
342 /* wait for operation to complete */
343 mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
349 mvswitch_aneg_done(struct phy_device *phydev)
351 return 1; /* Return any positive value */
355 mvswitch_config_aneg(struct phy_device *phydev)
361 mvswitch_detach(struct phy_device *pdev)
363 struct mvswitch_priv *priv = to_mvsw(pdev);
364 struct net_device *dev = pdev->attached_dev;
370 dev->eth_mangle_rx = NULL;
371 dev->eth_mangle_tx = NULL;
372 dev->features = priv->orig_features;
373 dev->priv_flags &= ~IFF_NO_IP_ALIGN;
377 mvswitch_remove(struct phy_device *pdev)
379 struct mvswitch_priv *priv = to_mvsw(pdev);
385 mvswitch_probe(struct phy_device *pdev)
387 struct mvswitch_priv *priv;
389 priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
399 mvswitch_fixup(struct phy_device *dev)
401 struct mii_bus *bus = dev->mdio.bus;
404 if (dev->mdio.addr != 0x10)
407 reg = bus->read(bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
408 if (reg != MV_IDENT_VALUE)
411 dev->phy_id = MVSWITCH_MAGIC;
416 static struct phy_driver mvswitch_driver = {
417 .name = "Marvell 88E6060",
418 .phy_id = MVSWITCH_MAGIC,
419 .phy_id_mask = 0xffffffff,
420 .features = PHY_BASIC_FEATURES,
421 .probe = &mvswitch_probe,
422 .remove = &mvswitch_remove,
423 .detach = &mvswitch_detach,
424 .config_init = &mvswitch_config_init,
425 .config_aneg = &mvswitch_config_aneg,
426 .aneg_done = &mvswitch_aneg_done,
427 .read_status = &mvswitch_read_status,
433 phy_register_fixup_for_id(PHY_ANY_ID, mvswitch_fixup);
434 return phy_driver_register(&mvswitch_driver, THIS_MODULE);
440 phy_driver_unregister(&mvswitch_driver);
443 module_init(mvswitch_init);
444 module_exit(mvswitch_exit);