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 struct mvswitch_priv {
42 /* the driver's tx function */
43 int (*hardstart)(struct sk_buff *skb, struct net_device *dev);
44 struct vlan_group *grp;
48 #define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv)
51 r16(struct phy_device *phydev, int addr, int reg)
53 return phydev->bus->read(phydev->bus, addr, reg);
57 w16(struct phy_device *phydev, int addr, int reg, u16 val)
59 phydev->bus->write(phydev->bus, addr, reg, val);
64 mvswitch_mangle_tx(struct sk_buff *skb, struct net_device *dev)
66 struct mvswitch_priv *priv;
74 if (unlikely(skb->len < 16))
78 if (__vlan_hwaccel_get_tag(skb, &vid))
81 if (skb_cloned(skb) || (skb->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) {
82 if (pskb_expand_head(skb, MV_HEADER_SIZE, (skb->len < 62 ? 62 - skb->len : 0), GFP_ATOMIC))
87 buf = skb_push(skb, MV_HEADER_SIZE);
89 if (__vlan_get_tag(skb, &vid))
92 if (unlikely((vid > 15 || !priv->vlans[vid])))
96 if (pskb_expand_head(skb, 0, 64 + MV_TRAILER_SIZE - skb->len, GFP_ATOMIC))
100 skb->len = 64 + MV_TRAILER_SIZE;
102 if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
103 if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC))
106 buf = skb_put(skb, 4);
109 /* move the ethernet header 4 bytes forward, overwriting the vlan tag */
110 memmove(skb->data + 4, skb->data, 12);
113 skb->mac_header += 4;
121 /* prepend the tag */
122 *((__be16 *) buf) = cpu_to_be16(
123 ((vid << MV_HEADER_VLAN_S) & MV_HEADER_VLAN_M) |
124 ((priv->vlans[vid] << MV_HEADER_PORTS_S) & MV_HEADER_PORTS_M)
128 *((__be32 *) buf) = cpu_to_be32((
129 (MV_TRAILER_OVERRIDE << MV_TRAILER_FLAGS_S) |
130 ((priv->vlans[vid] & MV_TRAILER_PORTS_M) << MV_TRAILER_PORTS_S)
134 return priv->hardstart(skb, dev);
138 printk("%s: failed to expand/update skb for the switch\n", dev->name);
141 /* any errors? drop the packet! */
142 dev_kfree_skb_any(skb);
147 mvswitch_mangle_rx(struct sk_buff *skb, int napi)
149 struct mvswitch_priv *priv;
150 struct net_device *dev;
168 skb_pull(skb, MV_HEADER_SIZE);
170 buf = skb->data + skb->len - MV_TRAILER_SIZE;
175 /* look for the vlan matching the incoming port */
176 for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) {
177 if ((1 << buf[1]) & priv->vlans[i])
184 skb->protocol = eth_type_trans(skb, skb->dev);
187 return vlan_hwaccel_receive_skb(skb, priv->grp, vlan);
189 return vlan_hwaccel_rx(skb, priv->grp, vlan);
192 /* no vlan? eat the packet! */
193 dev_kfree_skb_any(skb);
199 mvswitch_netif_rx(struct sk_buff *skb)
201 return mvswitch_mangle_rx(skb, 0);
205 mvswitch_netif_receive_skb(struct sk_buff *skb)
207 return mvswitch_mangle_rx(skb, 1);
212 mvswitch_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
214 struct mvswitch_priv *priv = dev->phy_ptr;
220 mvswitch_wait_mask(struct phy_device *pdev, int addr, int reg, u16 mask, u16 val)
226 r = r16(pdev, addr, reg) & mask;
234 mvswitch_config_init(struct phy_device *pdev)
236 struct mvswitch_priv *priv = to_mvsw(pdev);
237 struct net_device *dev = pdev->attached_dev;
244 printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
245 pdev->supported = ADVERTISED_100baseT_Full;
246 pdev->advertising = ADVERTISED_100baseT_Full;
250 /* initialize default vlans */
251 for (i = 0; i < MV_PORTS; i++)
252 priv->vlans[(i == MV_WANPORT ? 1 : 0)] |= (1 << i);
254 /* before entering reset, disable all ports */
255 for (i = 0; i < MV_PORTS; i++)
256 w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
258 msleep(2); /* wait for the status change to settle in */
260 /* put the ATU in reset */
261 w16(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET);
263 i = mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET, 0);
265 printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
269 /* set the ATU flags */
270 w16(pdev, MV_SWITCHREG(ATU_CTRL),
273 MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */
276 /* initialize the cpu port */
277 w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
286 /* wait for the phy change to settle in */
288 for (i = 0; i < MV_PORTS; i++) {
294 /* look for the matching vlan */
295 for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
296 if (priv->vlans[j] & (1 << i)) {
297 vlmap = priv->vlans[j];
301 /* leave port unconfigured if it's not part of a vlan */
305 /* add the cpu port to the allowed destinations list */
306 vlmap |= (1 << MV_CPUPORT);
308 /* take port out of its own vlan destination map */
311 /* apply vlan settings */
312 w16(pdev, MV_PORTREG(VLANMAP, i),
313 MV_PORTVLAN_PORTS(vlmap) |
318 w16(pdev, MV_PORTREG(CONTROL, i),
323 w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
324 MV_PORTVLAN_ID(MV_CPUPORT)
327 /* set the port association vector */
328 for (i = 0; i <= MV_PORTS; i++) {
329 w16(pdev, MV_PORTREG(ASSOC, i),
330 MV_PORTASSOC_PORTS(1 << i)
334 /* init switch control */
335 w16(pdev, MV_SWITCHREG(CTRL),
340 /* hook into the tx function */
341 priv->hardstart = dev->hard_start_xmit;
342 pdev->netif_receive_skb = mvswitch_netif_receive_skb;
343 pdev->netif_rx = mvswitch_netif_rx;
344 dev->hard_start_xmit = mvswitch_mangle_tx;
345 dev->vlan_rx_register = mvswitch_vlan_rx_register;
347 dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX;
349 dev->features |= NETIF_F_HW_VLAN_RX;
356 mvswitch_read_status(struct phy_device *pdev)
358 pdev->speed = SPEED_100;
359 pdev->duplex = DUPLEX_FULL;
360 pdev->state = PHY_UP;
362 /* XXX ugly workaround: we can't force the switch
363 * to gracefully handle hosts moving from one port to another,
364 * so we have to regularly clear the ATU database */
366 /* wait for the ATU to become available */
367 mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
370 w16(pdev, MV_SWITCHREG(ATU_OP),
371 MV_ATUOP_INPROGRESS |
375 /* wait for operation to complete */
376 mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
382 mvswitch_config_aneg(struct phy_device *phydev)
388 mvswitch_remove(struct phy_device *pdev)
390 struct mvswitch_priv *priv = to_mvsw(pdev);
391 struct net_device *dev = pdev->attached_dev;
393 /* restore old xmit handler */
394 if (priv->hardstart && dev)
395 dev->hard_start_xmit = priv->hardstart;
396 dev->vlan_rx_register = NULL;
397 dev->vlan_rx_kill_vid = NULL;
399 dev->features &= ~NETIF_F_HW_VLAN_RX;
404 mvswitch_detect(struct mii_bus *bus, int addr)
409 /* we attach to phy id 31 to make sure that the late probe works */
413 /* look for the switch on the bus */
414 reg = bus->read(bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
415 if (reg != MV_IDENT_VALUE)
419 * Now that we've established that the switch actually exists, let's
420 * get rid of the competition :)
422 for (i = 0; i < 31; i++) {
423 if (!bus->phy_map[i])
426 device_unregister(&bus->phy_map[i]->dev);
427 kfree(bus->phy_map[i]);
428 bus->phy_map[i] = NULL;
435 mvswitch_probe(struct phy_device *pdev)
437 struct mvswitch_priv *priv;
439 priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
449 static struct phy_driver mvswitch_driver = {
450 .name = "Marvell 88E6060",
451 .features = PHY_BASIC_FEATURES,
452 .detect = &mvswitch_detect,
453 .probe = &mvswitch_probe,
454 .remove = &mvswitch_remove,
455 .config_init = &mvswitch_config_init,
456 .config_aneg = &mvswitch_config_aneg,
457 .read_status = &mvswitch_read_status,
458 .driver = { .owner = THIS_MODULE,},
464 return phy_driver_register(&mvswitch_driver);
470 phy_driver_unregister(&mvswitch_driver);
473 module_init(mvswitch_init);
474 module_exit(mvswitch_exit);