2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/phy.h>
14 #include <linux/phy_fixed.h>
15 #include <linux/of_net.h>
16 #include <linux/of_mdio.h>
19 /* slave mii_bus handling ***************************************************/
20 static int dsa_slave_phy_read(struct mii_bus
*bus
, int addr
, int reg
)
22 struct dsa_switch
*ds
= bus
->priv
;
24 if (ds
->phys_mii_mask
& (1 << addr
))
25 return ds
->drv
->phy_read(ds
, addr
, reg
);
30 static int dsa_slave_phy_write(struct mii_bus
*bus
, int addr
, int reg
, u16 val
)
32 struct dsa_switch
*ds
= bus
->priv
;
34 if (ds
->phys_mii_mask
& (1 << addr
))
35 return ds
->drv
->phy_write(ds
, addr
, reg
, val
);
40 void dsa_slave_mii_bus_init(struct dsa_switch
*ds
)
42 ds
->slave_mii_bus
->priv
= (void *)ds
;
43 ds
->slave_mii_bus
->name
= "dsa slave smi";
44 ds
->slave_mii_bus
->read
= dsa_slave_phy_read
;
45 ds
->slave_mii_bus
->write
= dsa_slave_phy_write
;
46 snprintf(ds
->slave_mii_bus
->id
, MII_BUS_ID_SIZE
, "dsa-%d:%.2x",
47 ds
->index
, ds
->pd
->sw_addr
);
48 ds
->slave_mii_bus
->parent
= ds
->master_dev
;
52 /* slave device handling ****************************************************/
53 static int dsa_slave_init(struct net_device
*dev
)
55 struct dsa_slave_priv
*p
= netdev_priv(dev
);
57 dev
->iflink
= p
->parent
->dst
->master_netdev
->ifindex
;
62 static int dsa_slave_open(struct net_device
*dev
)
64 struct dsa_slave_priv
*p
= netdev_priv(dev
);
65 struct net_device
*master
= p
->parent
->dst
->master_netdev
;
66 struct dsa_switch
*ds
= p
->parent
;
69 if (!(master
->flags
& IFF_UP
))
72 if (!ether_addr_equal(dev
->dev_addr
, master
->dev_addr
)) {
73 err
= dev_uc_add(master
, dev
->dev_addr
);
78 if (dev
->flags
& IFF_ALLMULTI
) {
79 err
= dev_set_allmulti(master
, 1);
83 if (dev
->flags
& IFF_PROMISC
) {
84 err
= dev_set_promiscuity(master
, 1);
89 if (ds
->drv
->port_enable
) {
90 err
= ds
->drv
->port_enable(ds
, p
->port
, p
->phy
);
101 if (dev
->flags
& IFF_PROMISC
)
102 dev_set_promiscuity(master
, 0);
104 if (dev
->flags
& IFF_ALLMULTI
)
105 dev_set_allmulti(master
, -1);
107 if (!ether_addr_equal(dev
->dev_addr
, master
->dev_addr
))
108 dev_uc_del(master
, dev
->dev_addr
);
113 static int dsa_slave_close(struct net_device
*dev
)
115 struct dsa_slave_priv
*p
= netdev_priv(dev
);
116 struct net_device
*master
= p
->parent
->dst
->master_netdev
;
117 struct dsa_switch
*ds
= p
->parent
;
122 dev_mc_unsync(master
, dev
);
123 dev_uc_unsync(master
, dev
);
124 if (dev
->flags
& IFF_ALLMULTI
)
125 dev_set_allmulti(master
, -1);
126 if (dev
->flags
& IFF_PROMISC
)
127 dev_set_promiscuity(master
, -1);
129 if (!ether_addr_equal(dev
->dev_addr
, master
->dev_addr
))
130 dev_uc_del(master
, dev
->dev_addr
);
132 if (ds
->drv
->port_disable
)
133 ds
->drv
->port_disable(ds
, p
->port
, p
->phy
);
138 static void dsa_slave_change_rx_flags(struct net_device
*dev
, int change
)
140 struct dsa_slave_priv
*p
= netdev_priv(dev
);
141 struct net_device
*master
= p
->parent
->dst
->master_netdev
;
143 if (change
& IFF_ALLMULTI
)
144 dev_set_allmulti(master
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
145 if (change
& IFF_PROMISC
)
146 dev_set_promiscuity(master
, dev
->flags
& IFF_PROMISC
? 1 : -1);
149 static void dsa_slave_set_rx_mode(struct net_device
*dev
)
151 struct dsa_slave_priv
*p
= netdev_priv(dev
);
152 struct net_device
*master
= p
->parent
->dst
->master_netdev
;
154 dev_mc_sync(master
, dev
);
155 dev_uc_sync(master
, dev
);
158 static int dsa_slave_set_mac_address(struct net_device
*dev
, void *a
)
160 struct dsa_slave_priv
*p
= netdev_priv(dev
);
161 struct net_device
*master
= p
->parent
->dst
->master_netdev
;
162 struct sockaddr
*addr
= a
;
165 if (!is_valid_ether_addr(addr
->sa_data
))
166 return -EADDRNOTAVAIL
;
168 if (!(dev
->flags
& IFF_UP
))
171 if (!ether_addr_equal(addr
->sa_data
, master
->dev_addr
)) {
172 err
= dev_uc_add(master
, addr
->sa_data
);
177 if (!ether_addr_equal(dev
->dev_addr
, master
->dev_addr
))
178 dev_uc_del(master
, dev
->dev_addr
);
181 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
186 static int dsa_slave_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
188 struct dsa_slave_priv
*p
= netdev_priv(dev
);
191 return phy_mii_ioctl(p
->phy
, ifr
, cmd
);
196 static netdev_tx_t
dsa_slave_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
198 struct dsa_slave_priv
*p
= netdev_priv(dev
);
200 return p
->xmit(skb
, dev
);
203 static netdev_tx_t
dsa_slave_notag_xmit(struct sk_buff
*skb
,
204 struct net_device
*dev
)
206 struct dsa_slave_priv
*p
= netdev_priv(dev
);
208 skb
->dev
= p
->parent
->dst
->master_netdev
;
215 /* ethtool operations *******************************************************/
217 dsa_slave_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
219 struct dsa_slave_priv
*p
= netdev_priv(dev
);
223 if (p
->phy
!= NULL
) {
224 err
= phy_read_status(p
->phy
);
226 err
= phy_ethtool_gset(p
->phy
, cmd
);
233 dsa_slave_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
235 struct dsa_slave_priv
*p
= netdev_priv(dev
);
238 return phy_ethtool_sset(p
->phy
, cmd
);
243 static void dsa_slave_get_drvinfo(struct net_device
*dev
,
244 struct ethtool_drvinfo
*drvinfo
)
246 strlcpy(drvinfo
->driver
, "dsa", sizeof(drvinfo
->driver
));
247 strlcpy(drvinfo
->version
, dsa_driver_version
, sizeof(drvinfo
->version
));
248 strlcpy(drvinfo
->fw_version
, "N/A", sizeof(drvinfo
->fw_version
));
249 strlcpy(drvinfo
->bus_info
, "platform", sizeof(drvinfo
->bus_info
));
252 static int dsa_slave_get_regs_len(struct net_device
*dev
)
254 struct dsa_slave_priv
*p
= netdev_priv(dev
);
255 struct dsa_switch
*ds
= p
->parent
;
257 if (ds
->drv
->get_regs_len
)
258 return ds
->drv
->get_regs_len(ds
, p
->port
);
264 dsa_slave_get_regs(struct net_device
*dev
, struct ethtool_regs
*regs
, void *_p
)
266 struct dsa_slave_priv
*p
= netdev_priv(dev
);
267 struct dsa_switch
*ds
= p
->parent
;
269 if (ds
->drv
->get_regs
)
270 ds
->drv
->get_regs(ds
, p
->port
, regs
, _p
);
273 static int dsa_slave_nway_reset(struct net_device
*dev
)
275 struct dsa_slave_priv
*p
= netdev_priv(dev
);
278 return genphy_restart_aneg(p
->phy
);
283 static u32
dsa_slave_get_link(struct net_device
*dev
)
285 struct dsa_slave_priv
*p
= netdev_priv(dev
);
287 if (p
->phy
!= NULL
) {
288 genphy_update_link(p
->phy
);
295 static int dsa_slave_get_eeprom_len(struct net_device
*dev
)
297 struct dsa_slave_priv
*p
= netdev_priv(dev
);
298 struct dsa_switch
*ds
= p
->parent
;
300 if (ds
->pd
->eeprom_len
)
301 return ds
->pd
->eeprom_len
;
303 if (ds
->drv
->get_eeprom_len
)
304 return ds
->drv
->get_eeprom_len(ds
);
309 static int dsa_slave_get_eeprom(struct net_device
*dev
,
310 struct ethtool_eeprom
*eeprom
, u8
*data
)
312 struct dsa_slave_priv
*p
= netdev_priv(dev
);
313 struct dsa_switch
*ds
= p
->parent
;
315 if (ds
->drv
->get_eeprom
)
316 return ds
->drv
->get_eeprom(ds
, eeprom
, data
);
321 static int dsa_slave_set_eeprom(struct net_device
*dev
,
322 struct ethtool_eeprom
*eeprom
, u8
*data
)
324 struct dsa_slave_priv
*p
= netdev_priv(dev
);
325 struct dsa_switch
*ds
= p
->parent
;
327 if (ds
->drv
->set_eeprom
)
328 return ds
->drv
->set_eeprom(ds
, eeprom
, data
);
333 static void dsa_slave_get_strings(struct net_device
*dev
,
334 uint32_t stringset
, uint8_t *data
)
336 struct dsa_slave_priv
*p
= netdev_priv(dev
);
337 struct dsa_switch
*ds
= p
->parent
;
339 if (stringset
== ETH_SS_STATS
) {
340 int len
= ETH_GSTRING_LEN
;
342 strncpy(data
, "tx_packets", len
);
343 strncpy(data
+ len
, "tx_bytes", len
);
344 strncpy(data
+ 2 * len
, "rx_packets", len
);
345 strncpy(data
+ 3 * len
, "rx_bytes", len
);
346 if (ds
->drv
->get_strings
!= NULL
)
347 ds
->drv
->get_strings(ds
, p
->port
, data
+ 4 * len
);
351 static void dsa_slave_get_ethtool_stats(struct net_device
*dev
,
352 struct ethtool_stats
*stats
,
355 struct dsa_slave_priv
*p
= netdev_priv(dev
);
356 struct dsa_switch
*ds
= p
->parent
;
358 data
[0] = p
->dev
->stats
.tx_packets
;
359 data
[1] = p
->dev
->stats
.tx_bytes
;
360 data
[2] = p
->dev
->stats
.rx_packets
;
361 data
[3] = p
->dev
->stats
.rx_bytes
;
362 if (ds
->drv
->get_ethtool_stats
!= NULL
)
363 ds
->drv
->get_ethtool_stats(ds
, p
->port
, data
+ 4);
366 static int dsa_slave_get_sset_count(struct net_device
*dev
, int sset
)
368 struct dsa_slave_priv
*p
= netdev_priv(dev
);
369 struct dsa_switch
*ds
= p
->parent
;
371 if (sset
== ETH_SS_STATS
) {
375 if (ds
->drv
->get_sset_count
!= NULL
)
376 count
+= ds
->drv
->get_sset_count(ds
);
384 static void dsa_slave_get_wol(struct net_device
*dev
, struct ethtool_wolinfo
*w
)
386 struct dsa_slave_priv
*p
= netdev_priv(dev
);
387 struct dsa_switch
*ds
= p
->parent
;
389 if (ds
->drv
->get_wol
)
390 ds
->drv
->get_wol(ds
, p
->port
, w
);
393 static int dsa_slave_set_wol(struct net_device
*dev
, struct ethtool_wolinfo
*w
)
395 struct dsa_slave_priv
*p
= netdev_priv(dev
);
396 struct dsa_switch
*ds
= p
->parent
;
397 int ret
= -EOPNOTSUPP
;
399 if (ds
->drv
->set_wol
)
400 ret
= ds
->drv
->set_wol(ds
, p
->port
, w
);
405 static int dsa_slave_set_eee(struct net_device
*dev
, struct ethtool_eee
*e
)
407 struct dsa_slave_priv
*p
= netdev_priv(dev
);
408 struct dsa_switch
*ds
= p
->parent
;
411 if (!ds
->drv
->set_eee
)
414 ret
= ds
->drv
->set_eee(ds
, p
->port
, p
->phy
, e
);
419 ret
= phy_ethtool_set_eee(p
->phy
, e
);
424 static int dsa_slave_get_eee(struct net_device
*dev
, struct ethtool_eee
*e
)
426 struct dsa_slave_priv
*p
= netdev_priv(dev
);
427 struct dsa_switch
*ds
= p
->parent
;
430 if (!ds
->drv
->get_eee
)
433 ret
= ds
->drv
->get_eee(ds
, p
->port
, e
);
438 ret
= phy_ethtool_get_eee(p
->phy
, e
);
443 static const struct ethtool_ops dsa_slave_ethtool_ops
= {
444 .get_settings
= dsa_slave_get_settings
,
445 .set_settings
= dsa_slave_set_settings
,
446 .get_drvinfo
= dsa_slave_get_drvinfo
,
447 .get_regs_len
= dsa_slave_get_regs_len
,
448 .get_regs
= dsa_slave_get_regs
,
449 .nway_reset
= dsa_slave_nway_reset
,
450 .get_link
= dsa_slave_get_link
,
451 .get_eeprom_len
= dsa_slave_get_eeprom_len
,
452 .get_eeprom
= dsa_slave_get_eeprom
,
453 .set_eeprom
= dsa_slave_set_eeprom
,
454 .get_strings
= dsa_slave_get_strings
,
455 .get_ethtool_stats
= dsa_slave_get_ethtool_stats
,
456 .get_sset_count
= dsa_slave_get_sset_count
,
457 .set_wol
= dsa_slave_set_wol
,
458 .get_wol
= dsa_slave_get_wol
,
459 .set_eee
= dsa_slave_set_eee
,
460 .get_eee
= dsa_slave_get_eee
,
463 static const struct net_device_ops dsa_slave_netdev_ops
= {
464 .ndo_init
= dsa_slave_init
,
465 .ndo_open
= dsa_slave_open
,
466 .ndo_stop
= dsa_slave_close
,
467 .ndo_start_xmit
= dsa_slave_xmit
,
468 .ndo_change_rx_flags
= dsa_slave_change_rx_flags
,
469 .ndo_set_rx_mode
= dsa_slave_set_rx_mode
,
470 .ndo_set_mac_address
= dsa_slave_set_mac_address
,
471 .ndo_do_ioctl
= dsa_slave_ioctl
,
474 static void dsa_slave_adjust_link(struct net_device
*dev
)
476 struct dsa_slave_priv
*p
= netdev_priv(dev
);
477 struct dsa_switch
*ds
= p
->parent
;
478 unsigned int status_changed
= 0;
480 if (p
->old_link
!= p
->phy
->link
) {
482 p
->old_link
= p
->phy
->link
;
485 if (p
->old_duplex
!= p
->phy
->duplex
) {
487 p
->old_duplex
= p
->phy
->duplex
;
490 if (p
->old_pause
!= p
->phy
->pause
) {
492 p
->old_pause
= p
->phy
->pause
;
495 if (ds
->drv
->adjust_link
&& status_changed
)
496 ds
->drv
->adjust_link(ds
, p
->port
, p
->phy
);
499 phy_print_status(p
->phy
);
502 static int dsa_slave_fixed_link_update(struct net_device
*dev
,
503 struct fixed_phy_status
*status
)
505 struct dsa_slave_priv
*p
= netdev_priv(dev
);
506 struct dsa_switch
*ds
= p
->parent
;
508 if (ds
->drv
->fixed_link_update
)
509 ds
->drv
->fixed_link_update(ds
, p
->port
, status
);
514 /* slave device setup *******************************************************/
515 static int dsa_slave_phy_setup(struct dsa_slave_priv
*p
,
516 struct net_device
*slave_dev
)
518 struct dsa_switch
*ds
= p
->parent
;
519 struct dsa_chip_data
*cd
= ds
->pd
;
520 struct device_node
*phy_dn
, *port_dn
;
521 bool phy_is_fixed
= false;
525 port_dn
= cd
->port_dn
[p
->port
];
526 p
->phy_interface
= of_get_phy_mode(port_dn
);
528 phy_dn
= of_parse_phandle(port_dn
, "phy-handle", 0);
529 if (of_phy_is_fixed_link(port_dn
)) {
530 /* In the case of a fixed PHY, the DT node associated
531 * to the fixed PHY is the Port DT node
533 ret
= of_phy_register_fixed_link(port_dn
);
535 netdev_err(slave_dev
, "failed to register fixed PHY\n");
542 if (ds
->drv
->get_phy_flags
)
543 phy_flags
= ds
->drv
->get_phy_flags(ds
, p
->port
);
546 p
->phy
= of_phy_connect(slave_dev
, phy_dn
,
547 dsa_slave_adjust_link
, phy_flags
,
550 if (p
->phy
&& phy_is_fixed
)
551 fixed_phy_set_link_update(p
->phy
, dsa_slave_fixed_link_update
);
553 /* We could not connect to a designated PHY, so use the switch internal
557 p
->phy
= ds
->slave_mii_bus
->phy_map
[p
->port
];
561 phy_connect_direct(slave_dev
, p
->phy
, dsa_slave_adjust_link
,
564 netdev_info(slave_dev
, "attached PHY at address %d [%s]\n",
565 p
->phy
->addr
, p
->phy
->drv
->name
);
571 int dsa_slave_suspend(struct net_device
*slave_dev
)
573 struct dsa_slave_priv
*p
= netdev_priv(slave_dev
);
575 netif_device_detach(slave_dev
);
588 int dsa_slave_resume(struct net_device
*slave_dev
)
590 struct dsa_slave_priv
*p
= netdev_priv(slave_dev
);
592 netif_device_attach(slave_dev
);
603 dsa_slave_create(struct dsa_switch
*ds
, struct device
*parent
,
604 int port
, char *name
)
606 struct net_device
*master
= ds
->dst
->master_netdev
;
607 struct net_device
*slave_dev
;
608 struct dsa_slave_priv
*p
;
611 slave_dev
= alloc_netdev(sizeof(struct dsa_slave_priv
), name
,
612 NET_NAME_UNKNOWN
, ether_setup
);
613 if (slave_dev
== NULL
)
616 slave_dev
->features
= master
->vlan_features
;
617 slave_dev
->ethtool_ops
= &dsa_slave_ethtool_ops
;
618 eth_hw_addr_inherit(slave_dev
, master
);
619 slave_dev
->tx_queue_len
= 0;
620 slave_dev
->netdev_ops
= &dsa_slave_netdev_ops
;
622 SET_NETDEV_DEV(slave_dev
, parent
);
623 slave_dev
->dev
.of_node
= ds
->pd
->port_dn
[port
];
624 slave_dev
->vlan_features
= master
->vlan_features
;
626 p
= netdev_priv(slave_dev
);
631 switch (ds
->dst
->tag_protocol
) {
632 #ifdef CONFIG_NET_DSA_TAG_DSA
633 case DSA_TAG_PROTO_DSA
:
634 p
->xmit
= dsa_netdev_ops
.xmit
;
637 #ifdef CONFIG_NET_DSA_TAG_EDSA
638 case DSA_TAG_PROTO_EDSA
:
639 p
->xmit
= edsa_netdev_ops
.xmit
;
642 #ifdef CONFIG_NET_DSA_TAG_TRAILER
643 case DSA_TAG_PROTO_TRAILER
:
644 p
->xmit
= trailer_netdev_ops
.xmit
;
647 #ifdef CONFIG_NET_DSA_TAG_BRCM
648 case DSA_TAG_PROTO_BRCM
:
649 p
->xmit
= brcm_netdev_ops
.xmit
;
653 p
->xmit
= dsa_slave_notag_xmit
;
661 ret
= dsa_slave_phy_setup(p
, slave_dev
);
663 free_netdev(slave_dev
);
667 ret
= register_netdev(slave_dev
);
669 netdev_err(master
, "error %d registering interface %s\n",
670 ret
, slave_dev
->name
);
671 phy_disconnect(p
->phy
);
672 free_netdev(slave_dev
);
676 netif_carrier_off(slave_dev
);
678 if (p
->phy
!= NULL
) {
679 if (ds
->drv
->get_phy_flags
)
680 p
->phy
->dev_flags
|= ds
->drv
->get_phy_flags(ds
, port
);
682 phy_attach(slave_dev
, dev_name(&p
->phy
->dev
),
683 PHY_INTERFACE_MODE_GMII
);
685 p
->phy
->autoneg
= AUTONEG_ENABLE
;
688 p
->phy
->advertising
= p
->phy
->supported
| ADVERTISED_Autoneg
;