86 static int sja1105_drop_untagged(struct dsa_switch *ds, int port, bool drop)  in sja1105_drop_untagged()  argument
88 	struct sja1105_private *priv = ds->priv;  in sja1105_drop_untagged()
117 static int sja1105_commit_pvid(struct dsa_switch *ds, int port)  in sja1105_commit_pvid()  argument
119 	struct dsa_port *dp = dsa_to_port(ds, port);  in sja1105_commit_pvid()
121 	struct sja1105_private *priv = ds->priv;  in sja1105_commit_pvid()
152 	if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))  in sja1105_commit_pvid()
155 	return sja1105_drop_untagged(ds, port, drop_untagged);  in sja1105_commit_pvid()
200 	struct dsa_switch *ds = priv->ds;  in sja1105_init_mac_settings()  local
221 	list_for_each_entry(dp, &ds->dst->ports, list) {  in sja1105_init_mac_settings()
222 		if (dp->ds != ds)  in sja1105_init_mac_settings()
251 	struct dsa_switch *ds = priv->ds;  in sja1105_init_mii_settings()  local
273 	for (i = 0; i < ds->num_ports; i++) {  in sja1105_init_mii_settings()
276 		if (dsa_is_unused_port(priv->ds, i))  in sja1105_init_mii_settings()
377 	for (port = 0; port < priv->ds->num_ports; port++)  in sja1105_init_static_fdb()
378 		if (!dsa_is_unused_port(priv->ds, port))  in sja1105_init_static_fdb()
414 	struct dsa_switch *ds = priv->ds;  in sja1105_init_l2_lookup_params()  local
419 	for (port = 0; port < ds->num_ports; port++)  in sja1105_init_l2_lookup_params()
420 		if (!dsa_is_unused_port(ds, port))  in sja1105_init_l2_lookup_params()
425 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_l2_lookup_params()
426 		if (dsa_is_unused_port(ds, port))  in sja1105_init_l2_lookup_params()
472 	struct dsa_switch *ds = priv->ds;  in sja1105_init_static_vlan()  local
489 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_static_vlan()
490 		if (dsa_is_unused_port(ds, port))  in sja1105_init_static_vlan()
497 		if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) {  in sja1105_init_static_vlan()
510 	struct dsa_switch *ds = priv->ds;  in sja1105_init_l2_forwarding()  local
537 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_l2_forwarding()
538 		if (dsa_is_unused_port(ds, port))  in sja1105_init_l2_forwarding()
548 	for (from = 0; from < ds->num_ports; from++) {  in sja1105_init_l2_forwarding()
549 		if (!dsa_is_user_port(ds, from))  in sja1105_init_l2_forwarding()
552 		for (to = 0; to < ds->num_ports; to++) {  in sja1105_init_l2_forwarding()
553 			if (!dsa_is_cpu_port(ds, to) &&  in sja1105_init_l2_forwarding()
554 			    !dsa_is_dsa_port(ds, to))  in sja1105_init_l2_forwarding()
568 	for (from = 0; from < ds->num_ports; from++) {  in sja1105_init_l2_forwarding()
569 		if (!dsa_is_cpu_port(ds, from) && !dsa_is_dsa_port(ds, from))  in sja1105_init_l2_forwarding()
572 		for (to = 0; to < ds->num_ports; to++) {  in sja1105_init_l2_forwarding()
573 			if (dsa_is_unused_port(ds, to))  in sja1105_init_l2_forwarding()
594 	dst = ds->dst;  in sja1105_init_l2_forwarding()
597 		if (dl->dp->ds != ds || dl->link_dp->cpu_dp == dl->dp->cpu_dp)  in sja1105_init_l2_forwarding()
601 		to = dsa_upstream_port(ds, from);  in sja1105_init_l2_forwarding()
603 		dev_warn(ds->dev,  in sja1105_init_l2_forwarding()
616 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_l2_forwarding()
617 		if (dsa_is_unused_port(ds, port))  in sja1105_init_l2_forwarding()
628 		for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_l2_forwarding()
629 			if (dsa_is_unused_port(ds, port))  in sja1105_init_l2_forwarding()
632 			l2fwd[ds->num_ports + tc].vlan_pmap[port] = tc;  in sja1105_init_l2_forwarding()
635 		l2fwd[ds->num_ports + tc].type_egrpcp2outputq = true;  in sja1105_init_l2_forwarding()
644 	struct dsa_switch *ds = priv->ds;  in sja1110_init_pcp_remapping()  local
669 	for (port = 0; port < ds->num_ports; port++) {  in sja1110_init_pcp_remapping()
670 		if (dsa_is_unused_port(ds, port))  in sja1110_init_pcp_remapping()
793 	struct dsa_switch *ds = priv->ds;  in sja1105_init_topology()  local
800 	general_params->host_port = ds->num_ports;  in sja1105_init_topology()
813 		general_params->casc_port = ds->num_ports;  in sja1105_init_topology()
815 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_topology()
816 		bool is_upstream = dsa_is_upstream_port(ds, port);  in sja1105_init_topology()
817 		bool is_dsa_link = dsa_is_dsa_port(ds, port);  in sja1105_init_topology()
823 			if (general_params->host_port == ds->num_ports) {  in sja1105_init_topology()
826 				dev_err(ds->dev,  in sja1105_init_topology()
837 			} else if (general_params->casc_port == ds->num_ports) {  in sja1105_init_topology()
840 				dev_err(ds->dev,  in sja1105_init_topology()
848 	if (general_params->host_port == ds->num_ports) {  in sja1105_init_topology()
849 		dev_err(ds->dev, "No host port configured\n");  in sja1105_init_topology()
861 		.switchid = priv->ds->index,  in sja1105_init_general_params()
875 		.mirr_port = priv->ds->num_ports,  in sja1105_init_general_params()
1009 	struct dsa_switch *ds = priv->ds;  in sja1105_init_l2_policing()  local
1031 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_l2_policing()
1032 		int mcast = (ds->num_ports * (SJA1105_NUM_TC + 1)) + port;  in sja1105_init_l2_policing()
1033 		int bcast = (ds->num_ports * SJA1105_NUM_TC) + port;  in sja1105_init_l2_policing()
1045 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_init_l2_policing()
1048 		if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))  in sja1105_init_l2_policing()
1284 	struct device *dev = priv->ds->dev;  in sja1105_adjust_port_config()
1359 sja1105_mac_select_pcs(struct dsa_switch *ds, int port, phy_interface_t iface)  in sja1105_mac_select_pcs()  argument
1361 	struct sja1105_private *priv = ds->priv;  in sja1105_mac_select_pcs()
1370 static void sja1105_mac_link_down(struct dsa_switch *ds, int port,  in sja1105_mac_link_down()  argument
1374 	sja1105_inhibit_tx(ds->priv, BIT(port), true);  in sja1105_mac_link_down()
1377 static void sja1105_mac_link_up(struct dsa_switch *ds, int port,  in sja1105_mac_link_up()  argument
1384 	struct sja1105_private *priv = ds->priv;  in sja1105_mac_link_up()
1391 static void sja1105_phylink_get_caps(struct dsa_switch *ds, int port,  in sja1105_phylink_get_caps()  argument
1394 	struct sja1105_private *priv = ds->priv;  in sja1105_phylink_get_caps()
1548 int sja1105et_fdb_add(struct dsa_switch *ds, int port,  in sja1105et_fdb_add()  argument
1552 	struct sja1105_private *priv = ds->priv;  in sja1105et_fdb_add()
1553 	struct device *dev = ds->dev;  in sja1105et_fdb_add()
1633 int sja1105et_fdb_del(struct dsa_switch *ds, int port,  in sja1105et_fdb_del()  argument
1637 	struct sja1105_private *priv = ds->priv;  in sja1105et_fdb_del()
1668 int sja1105pqrs_fdb_add(struct dsa_switch *ds, int port,  in sja1105pqrs_fdb_add()  argument
1672 	struct sja1105_private *priv = ds->priv;  in sja1105pqrs_fdb_add()
1713 		dev_err(ds->dev, "FDB is full, cannot add entry.\n");  in sja1105pqrs_fdb_add()
1743 		dev_err(ds->dev,  in sja1105pqrs_fdb_add()
1759 int sja1105pqrs_fdb_del(struct dsa_switch *ds, int port,  in sja1105pqrs_fdb_del()  argument
1763 	struct sja1105_private *priv = ds->priv;  in sja1105pqrs_fdb_del()
1796 static int sja1105_fdb_add(struct dsa_switch *ds, int port,  in sja1105_fdb_add()  argument
1800 	struct sja1105_private *priv = ds->priv;  in sja1105_fdb_add()
1817 	rc = priv->info->fdb_add_cmd(ds, port, addr, vid);  in sja1105_fdb_add()
1823 static int __sja1105_fdb_del(struct dsa_switch *ds, int port,  in __sja1105_fdb_del()  argument
1827 	struct sja1105_private *priv = ds->priv;  in __sja1105_fdb_del()
1842 	return priv->info->fdb_del_cmd(ds, port, addr, vid);  in __sja1105_fdb_del()
1845 static int sja1105_fdb_del(struct dsa_switch *ds, int port,  in sja1105_fdb_del()  argument
1849 	struct sja1105_private *priv = ds->priv;  in sja1105_fdb_del()
1853 	rc = __sja1105_fdb_del(ds, port, addr, vid, db);  in sja1105_fdb_del()
1859 static int sja1105_fdb_dump(struct dsa_switch *ds, int port,  in sja1105_fdb_dump()  argument
1862 	struct sja1105_private *priv = ds->priv;  in sja1105_fdb_dump()
1863 	struct device *dev = ds->dev;  in sja1105_fdb_dump()
1908 static void sja1105_fast_age(struct dsa_switch *ds, int port)  in sja1105_fast_age()  argument
1910 	struct dsa_port *dp = dsa_to_port(ds, port);  in sja1105_fast_age()
1911 	struct sja1105_private *priv = ds->priv;  in sja1105_fast_age()
1934 			dev_err(ds->dev, "Failed to read FDB: %pe\n",  in sja1105_fast_age()
1948 		rc = __sja1105_fdb_del(ds, port, macaddr, l2_lookup.vlanid, db);  in sja1105_fast_age()
1950 			dev_err(ds->dev,  in sja1105_fast_age()
1960 static int sja1105_mdb_add(struct dsa_switch *ds, int port,  in sja1105_mdb_add()  argument
1964 	return sja1105_fdb_add(ds, port, mdb->addr, mdb->vid, db);  in sja1105_mdb_add()
1967 static int sja1105_mdb_del(struct dsa_switch *ds, int port,  in sja1105_mdb_del()  argument
1971 	return sja1105_fdb_del(ds, port, mdb->addr, mdb->vid, db);  in sja1105_mdb_del()
1983 	struct dsa_switch *ds = priv->ds;  in sja1105_manage_flood_domains()  local
1988 	for (from = 0; from < ds->num_ports; from++) {  in sja1105_manage_flood_domains()
1991 		for (to = 0; to < priv->ds->num_ports; to++) {  in sja1105_manage_flood_domains()
2018 static int sja1105_bridge_member(struct dsa_switch *ds, int port,  in sja1105_bridge_member()  argument
2022 	struct sja1105_private *priv = ds->priv;  in sja1105_bridge_member()
2027 	for (i = 0; i < ds->num_ports; i++) {  in sja1105_bridge_member()
2031 		if (!dsa_is_user_port(ds, i))  in sja1105_bridge_member()
2044 		if (!dsa_port_offloads_bridge(dsa_to_port(ds, i), &bridge))  in sja1105_bridge_member()
2060 	rc = sja1105_commit_pvid(ds, port);  in sja1105_bridge_member()
2067 static void sja1105_bridge_stp_state_set(struct dsa_switch *ds, int port,  in sja1105_bridge_stp_state_set()  argument
2070 	struct dsa_port *dp = dsa_to_port(ds, port);  in sja1105_bridge_stp_state_set()
2071 	struct sja1105_private *priv = ds->priv;  in sja1105_bridge_stp_state_set()
2104 		dev_err(ds->dev, "invalid STP state: %d\n", state);  in sja1105_bridge_stp_state_set()
2112 static int sja1105_bridge_join(struct dsa_switch *ds, int port,  in sja1105_bridge_join()  argument
2119 	rc = sja1105_bridge_member(ds, port, bridge, true);  in sja1105_bridge_join()
2123 	rc = dsa_tag_8021q_bridge_join(ds, port, bridge);  in sja1105_bridge_join()
2125 		sja1105_bridge_member(ds, port, bridge, false);  in sja1105_bridge_join()
2134 static void sja1105_bridge_leave(struct dsa_switch *ds, int port,  in sja1105_bridge_leave()  argument
2137 	dsa_tag_8021q_bridge_leave(ds, port, bridge);  in sja1105_bridge_leave()
2138 	sja1105_bridge_member(ds, port, bridge, false);  in sja1105_bridge_leave()
2197 static int sja1105_setup_tc_cbs(struct dsa_switch *ds, int port,  in sja1105_setup_tc_cbs()  argument
2200 	struct sja1105_private *priv = ds->priv;  in sja1105_setup_tc_cbs()
2294 	struct dsa_switch *ds = priv->ds;  in sja1105_static_config_reload()  local
2310 	for (i = 0; i < ds->num_ports; i++) {  in sja1105_static_config_reload()
2323 	rc = __sja1105_ptp_gettimex(ds, &now, &ptp_sts_before);  in sja1105_static_config_reload()
2336 	rc = __sja1105_ptp_settime(ds, 0, &ptp_sts_after);  in sja1105_static_config_reload()
2353 	__sja1105_ptp_adjtime(ds, now);  in sja1105_static_config_reload()
2357 	dev_info(priv->ds->dev,  in sja1105_static_config_reload()
2371 	for (i = 0; i < ds->num_ports; i++) {  in sja1105_static_config_reload()
2419 sja1105_get_tag_protocol(struct dsa_switch *ds, int port,  in sja1105_get_tag_protocol()  argument
2422 	struct sja1105_private *priv = ds->priv;  in sja1105_get_tag_protocol()
2431 int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,  in sja1105_vlan_filtering()  argument
2435 	struct sja1105_private *priv = ds->priv;  in sja1105_vlan_filtering()
2466 	for (port = 0; port < ds->num_ports; port++) {  in sja1105_vlan_filtering()
2467 		if (dsa_is_unused_port(ds, port))  in sja1105_vlan_filtering()
2470 		rc = sja1105_commit_pvid(ds, port);  in sja1105_vlan_filtering()
2562 static int sja1105_bridge_vlan_add(struct dsa_switch *ds, int port,  in sja1105_bridge_vlan_add()  argument
2566 	struct sja1105_private *priv = ds->priv;  in sja1105_bridge_vlan_add()
2579 	if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))  in sja1105_bridge_vlan_add()
2589 	return sja1105_commit_pvid(ds, port);  in sja1105_bridge_vlan_add()
2592 static int sja1105_bridge_vlan_del(struct dsa_switch *ds, int port,  in sja1105_bridge_vlan_del()  argument
2595 	struct sja1105_private *priv = ds->priv;  in sja1105_bridge_vlan_del()
2605 	return sja1105_commit_pvid(ds, port);  in sja1105_bridge_vlan_del()
2608 static int sja1105_dsa_8021q_vlan_add(struct dsa_switch *ds, int port, u16 vid,  in sja1105_dsa_8021q_vlan_add()  argument
2611 	struct sja1105_private *priv = ds->priv;  in sja1105_dsa_8021q_vlan_add()
2618 	if (dsa_is_user_port(ds, port))  in sja1105_dsa_8021q_vlan_add()
2628 	return sja1105_commit_pvid(ds, port);  in sja1105_dsa_8021q_vlan_add()
2631 static int sja1105_dsa_8021q_vlan_del(struct dsa_switch *ds, int port, u16 vid)  in sja1105_dsa_8021q_vlan_del()  argument
2633 	struct sja1105_private *priv = ds->priv;  in sja1105_dsa_8021q_vlan_del()
2638 static int sja1105_prechangeupper(struct dsa_switch *ds, int port,  in sja1105_prechangeupper()  argument
2643 	struct dsa_switch_tree *dst = ds->dst;  in sja1105_prechangeupper()
2666 static int sja1105_mgmt_xmit(struct dsa_switch *ds, int port, int slot,  in sja1105_mgmt_xmit()  argument
2670 	struct sja1105_private *priv = ds->priv;  in sja1105_mgmt_xmit()
2691 	dsa_enqueue_skb(skb, dsa_to_port(ds, port)->slave);  in sja1105_mgmt_xmit()
2698 			dev_err_ratelimited(priv->ds->dev,  in sja1105_mgmt_xmit()
2718 		dev_err_ratelimited(priv->ds->dev, "xmit timed out\n");  in sja1105_mgmt_xmit()
2735 	struct dsa_switch *ds = xmit_work->dp->ds;  in sja1105_port_deferred_xmit()  local
2736 	struct sja1105_private *priv = ds->priv;  in sja1105_port_deferred_xmit()
2743 	sja1105_mgmt_xmit(ds, port, 0, skb, !!clone);  in sja1105_port_deferred_xmit()
2747 		sja1105_ptp_txtstamp_skb(ds, port, clone);  in sja1105_port_deferred_xmit()
2754 static int sja1105_connect_tag_protocol(struct dsa_switch *ds,  in sja1105_connect_tag_protocol()  argument
2757 	struct sja1105_private *priv = ds->priv;  in sja1105_connect_tag_protocol()
2763 	tagger_data = sja1105_tagger_data(ds);  in sja1105_connect_tag_protocol()
2773 static int sja1105_set_ageing_time(struct dsa_switch *ds,  in sja1105_set_ageing_time()  argument
2777 	struct sja1105_private *priv = ds->priv;  in sja1105_set_ageing_time()
2794 static int sja1105_change_mtu(struct dsa_switch *ds, int port, int new_mtu)  in sja1105_change_mtu()  argument
2797 	struct sja1105_private *priv = ds->priv;  in sja1105_change_mtu()
2801 	if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))  in sja1105_change_mtu()
2814 static int sja1105_get_max_mtu(struct dsa_switch *ds, int port)  in sja1105_get_max_mtu()  argument
2819 static int sja1105_port_setup_tc(struct dsa_switch *ds, int port,  in sja1105_port_setup_tc()  argument
2825 		return sja1105_setup_tc_taprio(ds, port, type_data);  in sja1105_port_setup_tc()
2827 		return sja1105_setup_tc_cbs(ds, port, type_data);  in sja1105_port_setup_tc()
2844 	struct dsa_switch *ds = priv->ds;  in sja1105_mirror_apply()  local
2855 	already_enabled = (general_params->mirr_port != ds->num_ports);  in sja1105_mirror_apply()
2857 		dev_err(priv->ds->dev,  in sja1105_mirror_apply()
2869 		for (port = 0; port < ds->num_ports; port++) {  in sja1105_mirror_apply()
2877 			new_mirr_port = ds->num_ports;  in sja1105_mirror_apply()
2897 static int sja1105_mirror_add(struct dsa_switch *ds, int port,  in sja1105_mirror_add()  argument
2901 	return sja1105_mirror_apply(ds->priv, port, mirror->to_local_port,  in sja1105_mirror_add()
2905 static void sja1105_mirror_del(struct dsa_switch *ds, int port,  in sja1105_mirror_del()  argument
2908 	sja1105_mirror_apply(ds->priv, port, mirror->to_local_port,  in sja1105_mirror_del()
2912 static int sja1105_port_policer_add(struct dsa_switch *ds, int port,  in sja1105_port_policer_add()  argument
2916 	struct sja1105_private *priv = ds->priv;  in sja1105_port_policer_add()
2931 static void sja1105_port_policer_del(struct dsa_switch *ds, int port)  in sja1105_port_policer_del()  argument
2934 	struct sja1105_private *priv = ds->priv;  in sja1105_port_policer_del()
3016 static int sja1105_port_pre_bridge_flags(struct dsa_switch *ds, int port,  in sja1105_port_pre_bridge_flags()  argument
3020 	struct sja1105_private *priv = ds->priv;  in sja1105_port_pre_bridge_flags()
3041 static int sja1105_port_bridge_flags(struct dsa_switch *ds, int port,  in sja1105_port_bridge_flags()  argument
3045 	struct sja1105_private *priv = ds->priv;  in sja1105_port_bridge_flags()
3088 static int sja1105_setup(struct dsa_switch *ds)  in sja1105_setup()  argument
3090 	struct sja1105_private *priv = ds->priv;  in sja1105_setup()
3096 			dev_err(ds->dev,  in sja1105_setup()
3106 		dev_err(ds->dev, "Failed to load static config: %d\n", rc);  in sja1105_setup()
3114 			dev_err(ds->dev,  in sja1105_setup()
3121 	sja1105_tas_setup(ds);  in sja1105_setup()
3122 	sja1105_flower_setup(ds);  in sja1105_setup()
3124 	rc = sja1105_ptp_clock_register(ds);  in sja1105_setup()
3126 		dev_err(ds->dev, "Failed to register PTP clock: %d\n", rc);  in sja1105_setup()
3130 	rc = sja1105_mdiobus_register(ds);  in sja1105_setup()
3132 		dev_err(ds->dev, "Failed to register MDIO bus: %pe\n",  in sja1105_setup()
3137 	rc = sja1105_devlink_setup(ds);  in sja1105_setup()
3142 	rc = dsa_tag_8021q_register(ds, htons(ETH_P_8021Q));  in sja1105_setup()
3155 	ds->vlan_filtering_is_global = true;  in sja1105_setup()
3156 	ds->untag_bridge_pvid = true;  in sja1105_setup()
3157 	ds->fdb_isolation = true;  in sja1105_setup()
3159 	ds->max_num_bridges = 7;  in sja1105_setup()
3162 	ds->num_tx_queues = SJA1105_NUM_TC;  in sja1105_setup()
3164 	ds->mtu_enforcement_ingress = true;  in sja1105_setup()
3165 	ds->assisted_learning_on_cpu_port = true;  in sja1105_setup()
3170 	sja1105_devlink_teardown(ds);  in sja1105_setup()
3172 	sja1105_mdiobus_unregister(ds);  in sja1105_setup()
3174 	sja1105_ptp_clock_unregister(ds);  in sja1105_setup()
3176 	sja1105_flower_teardown(ds);  in sja1105_setup()
3177 	sja1105_tas_teardown(ds);  in sja1105_setup()
3184 static void sja1105_teardown(struct dsa_switch *ds)  in sja1105_teardown()  argument
3186 	struct sja1105_private *priv = ds->priv;  in sja1105_teardown()
3189 	dsa_tag_8021q_unregister(ds);  in sja1105_teardown()
3192 	sja1105_devlink_teardown(ds);  in sja1105_teardown()
3193 	sja1105_mdiobus_unregister(ds);  in sja1105_teardown()
3194 	sja1105_ptp_clock_unregister(ds);  in sja1105_teardown()
3195 	sja1105_flower_teardown(ds);  in sja1105_teardown()
3196 	sja1105_tas_teardown(ds);  in sja1105_teardown()
3302 	struct dsa_switch *ds;  in sja1105_probe()  local
3370 	ds = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL);  in sja1105_probe()
3371 	if (!ds)  in sja1105_probe()
3374 	ds->dev = dev;  in sja1105_probe()
3375 	ds->num_ports = priv->info->num_ports;  in sja1105_probe()
3376 	ds->ops = &sja1105_switch_ops;  in sja1105_probe()
3377 	ds->priv = priv;  in sja1105_probe()
3378 	priv->ds = ds;  in sja1105_probe()
3388 		dev_err(ds->dev, "Failed to parse DT: %d\n", rc);  in sja1105_probe()
3400 	return dsa_register_switch(priv->ds);  in sja1105_probe()
3410 	dsa_unregister_switch(priv->ds);  in sja1105_remove()
3420 	dsa_switch_shutdown(priv->ds);  in sja1105_shutdown()