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->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) {
82 if (pskb_expand_head(skb, MV_HEADER_SIZE, 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_config_init(struct phy_device *pdev)
222 struct mvswitch_priv *priv = to_mvsw(pdev);
223 struct net_device *dev = pdev->attached_dev;
230 printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
231 pdev->supported = ADVERTISED_100baseT_Full;
232 pdev->advertising = ADVERTISED_100baseT_Full;
235 /* initialize default vlans */
236 for (i = 0; i < MV_PORTS; i++)
237 priv->vlans[(i == MV_WANPORT ? 1 : 0)] |= (1 << i);
239 /* before entering reset, disable all ports */
240 for (i = 0; i < MV_PORTS; i++)
241 w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
243 msleep(2); /* wait for the status change to settle in */
245 /* put the device in reset and set ATU flags */
246 w16(pdev, MV_SWITCHREG(ATU_CTRL),
249 MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */
252 i = 100; /* timeout */
254 if (!(r16(pdev, MV_SWITCHREG(ATU_CTRL)) & MV_ATUCTL_RESET))
260 printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
264 /* initialize the cpu port */
265 w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
274 /* wait for the phy change to settle in */
276 for (i = 0; i < MV_PORTS; i++) {
282 /* look for the matching vlan */
283 for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
284 if (priv->vlans[j] & (1 << i)) {
285 vlmap = priv->vlans[j];
289 /* leave port unconfigured if it's not part of a vlan */
293 /* add the cpu port to the allowed destinations list */
294 vlmap |= (1 << MV_CPUPORT);
296 /* take port out of its own vlan destination map */
299 /* apply vlan settings */
300 w16(pdev, MV_PORTREG(VLANMAP, i),
301 MV_PORTVLAN_PORTS(vlmap) |
306 w16(pdev, MV_PORTREG(CONTROL, i), MV_PORTCTRL_ENABLED);
309 /* build the target list for the cpu port */
310 for (i = 0; i < MV_PORTS; i++)
313 w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
314 MV_PORTVLAN_PORTS(vlmap)
317 /* set the port association vector */
318 for (i = 0; i <= MV_PORTS; i++) {
319 w16(pdev, MV_PORTREG(ASSOC, i),
320 MV_PORTASSOC_PORTS(1 << i)
324 /* init switch control */
325 w16(pdev, MV_SWITCHREG(CTRL),
330 /* hook into the tx function */
331 priv->hardstart = dev->hard_start_xmit;
332 pdev->netif_receive_skb = mvswitch_netif_receive_skb;
333 pdev->netif_rx = mvswitch_netif_rx;
334 dev->hard_start_xmit = mvswitch_mangle_tx;
335 dev->vlan_rx_register = mvswitch_vlan_rx_register;
337 dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX;
339 dev->features |= NETIF_F_HW_VLAN_RX;
346 mvswitch_read_status(struct phy_device *phydev)
348 phydev->speed = SPEED_100;
349 phydev->duplex = DUPLEX_FULL;
350 phydev->state = PHY_UP;
355 mvswitch_config_aneg(struct phy_device *phydev)
361 mvswitch_remove(struct phy_device *pdev)
363 struct mvswitch_priv *priv = to_mvsw(pdev);
364 struct net_device *dev = pdev->attached_dev;
366 /* restore old xmit handler */
367 if (priv->hardstart && dev)
368 dev->hard_start_xmit = priv->hardstart;
369 dev->vlan_rx_register = NULL;
370 dev->vlan_rx_kill_vid = NULL;
372 dev->features &= ~NETIF_F_HW_VLAN_RX;
377 mvswitch_detect(struct mii_bus *bus, int addr)
382 /* we attach to phy id 31 to make sure that the late probe works */
386 /* look for the switch on the bus */
387 reg = bus->read(bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
388 if (reg != MV_IDENT_VALUE)
392 * Now that we've established that the switch actually exists, let's
393 * get rid of the competition :)
395 for (i = 0; i < 31; i++) {
396 if (!bus->phy_map[i])
399 device_unregister(&bus->phy_map[i]->dev);
400 kfree(bus->phy_map[i]);
401 bus->phy_map[i] = NULL;
408 mvswitch_probe(struct phy_device *pdev)
410 struct mvswitch_priv *priv;
412 priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
422 static struct phy_driver mvswitch_driver = {
423 .name = "Marvell 88E6060",
424 .features = PHY_BASIC_FEATURES,
425 .detect = &mvswitch_detect,
426 .probe = &mvswitch_probe,
427 .remove = &mvswitch_remove,
428 .config_init = &mvswitch_config_init,
429 .config_aneg = &mvswitch_config_aneg,
430 .read_status = &mvswitch_read_status,
431 .driver = { .owner = THIS_MODULE,},
437 return phy_driver_register(&mvswitch_driver);
443 phy_driver_unregister(&mvswitch_driver);
446 module_init(mvswitch_init);
447 module_exit(mvswitch_exit);