1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
  2/* Copyright 2024 NXP */
  3
  4#include <linux/fsl/enetc_mdio.h>
  5#include <linux/of_mdio.h>
  6#include <linux/of_net.h>
  7
  8#include "enetc_pf_common.h"
  9
 10static void enetc_set_si_hw_addr(struct enetc_pf *pf, int si,
 11				 const u8 *mac_addr)
 12{
 13	struct enetc_hw *hw = &pf->si->hw;
 14
 15	pf->ops->set_si_primary_mac(hw, si, mac_addr);
 16}
 17
 18static void enetc_get_si_hw_addr(struct enetc_pf *pf, int si, u8 *mac_addr)
 19{
 20	struct enetc_hw *hw = &pf->si->hw;
 21
 22	pf->ops->get_si_primary_mac(hw, si, mac_addr);
 23}
 24
 25int enetc_pf_set_mac_addr(struct net_device *ndev, void *addr)
 26{
 27	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 28	struct enetc_pf *pf = enetc_si_priv(priv->si);
 29	struct sockaddr *saddr = addr;
 30
 31	if (!is_valid_ether_addr(saddr->sa_data))
 32		return -EADDRNOTAVAIL;
 33
 34	eth_hw_addr_set(ndev, saddr->sa_data);
 35	enetc_set_si_hw_addr(pf, 0, saddr->sa_data);
 36
 37	return 0;
 38}
 39EXPORT_SYMBOL_GPL(enetc_pf_set_mac_addr);
 40
 41static int enetc_setup_mac_address(struct device_node *np, struct enetc_pf *pf,
 42				   int si)
 43{
 44	struct device *dev = &pf->si->pdev->dev;
 45	u8 mac_addr[ETH_ALEN] = { 0 };
 46	int err;
 47
 48	/* (1) try to get the MAC address from the device tree */
 49	if (np) {
 50		err = of_get_mac_address(np, mac_addr);
 51		if (err == -EPROBE_DEFER)
 52			return err;
 53	}
 54
 55	/* (2) bootloader supplied MAC address */
 56	if (is_zero_ether_addr(mac_addr))
 57		enetc_get_si_hw_addr(pf, si, mac_addr);
 58
 59	/* (3) choose a random one */
 60	if (is_zero_ether_addr(mac_addr)) {
 61		eth_random_addr(mac_addr);
 62		dev_info(dev, "no MAC address specified for SI%d, using %pM\n",
 63			 si, mac_addr);
 64	}
 65
 66	enetc_set_si_hw_addr(pf, si, mac_addr);
 67
 68	return 0;
 69}
 70
 71int enetc_setup_mac_addresses(struct device_node *np, struct enetc_pf *pf)
 72{
 73	int err, i;
 74
 75	/* The PF might take its MAC from the device tree */
 76	err = enetc_setup_mac_address(np, pf, 0);
 77	if (err)
 78		return err;
 79
 80	for (i = 0; i < pf->total_vfs; i++) {
 81		err = enetc_setup_mac_address(NULL, pf, i + 1);
 82		if (err)
 83			return err;
 84	}
 85
 86	return 0;
 87}
 88EXPORT_SYMBOL_GPL(enetc_setup_mac_addresses);
 89
 90void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
 91			   const struct net_device_ops *ndev_ops)
 92{
 93	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 94	struct enetc_pf *pf = enetc_si_priv(si);
 95
 96	SET_NETDEV_DEV(ndev, &si->pdev->dev);
 97	priv->ndev = ndev;
 98	priv->si = si;
 99	priv->dev = &si->pdev->dev;
100	si->ndev = ndev;
101
102	priv->msg_enable = (NETIF_MSG_WOL << 1) - 1;
103	priv->sysclk_freq = si->drvdata->sysclk_freq;
104	ndev->netdev_ops = ndev_ops;
105	enetc_set_ethtool_ops(ndev);
106	ndev->watchdog_timeo = 5 * HZ;
107	ndev->max_mtu = ENETC_MAX_MTU;
108
109	ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
110			    NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
111			    NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK |
112			    NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
113	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
114			 NETIF_F_HW_VLAN_CTAG_TX |
115			 NETIF_F_HW_VLAN_CTAG_RX |
116			 NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
117	ndev->vlan_features = NETIF_F_SG | NETIF_F_HW_CSUM |
118			      NETIF_F_TSO | NETIF_F_TSO6;
119
120	ndev->priv_flags |= IFF_UNICAST_FLT;
121
122	/* TODO: currently, i.MX95 ENETC driver does not support advanced features */
123	if (!is_enetc_rev1(si)) {
124		ndev->hw_features &= ~(NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK);
125		goto end;
126	}
127
128	if (si->num_rss)
129		ndev->hw_features |= NETIF_F_RXHASH;
130
131	ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
132			     NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_RX_SG |
133			     NETDEV_XDP_ACT_NDO_XMIT_SG;
134
135	if (si->hw_features & ENETC_SI_F_PSFP && pf->ops->enable_psfp &&
136	    !pf->ops->enable_psfp(priv)) {
137		priv->active_offloads |= ENETC_F_QCI;
138		ndev->features |= NETIF_F_HW_TC;
139		ndev->hw_features |= NETIF_F_HW_TC;
140	}
141
142end:
143	/* pick up primary MAC address from SI */
144	enetc_load_primary_mac_addr(&si->hw, ndev);
145}
146EXPORT_SYMBOL_GPL(enetc_pf_netdev_setup);
147
148static int enetc_mdio_probe(struct enetc_pf *pf, struct device_node *np)
149{
150	struct device *dev = &pf->si->pdev->dev;
151	struct enetc_mdio_priv *mdio_priv;
152	struct mii_bus *bus;
153	int err;
154
155	bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv));
156	if (!bus)
157		return -ENOMEM;
158
159	bus->name = "Freescale ENETC MDIO Bus";
160	bus->read = enetc_mdio_read_c22;
161	bus->write = enetc_mdio_write_c22;
162	bus->read_c45 = enetc_mdio_read_c45;
163	bus->write_c45 = enetc_mdio_write_c45;
164	bus->parent = dev;
165	mdio_priv = bus->priv;
166	mdio_priv->hw = &pf->si->hw;
167	mdio_priv->mdio_base = ENETC_EMDIO_BASE;
168	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
169
170	err = of_mdiobus_register(bus, np);
171	if (err)
172		return dev_err_probe(dev, err, "cannot register MDIO bus\n");
173
174	pf->mdio = bus;
175
176	return 0;
177}
178
179static void enetc_mdio_remove(struct enetc_pf *pf)
180{
181	if (pf->mdio)
182		mdiobus_unregister(pf->mdio);
183}
184
185static int enetc_imdio_create(struct enetc_pf *pf)
186{
187	struct device *dev = &pf->si->pdev->dev;
188	struct enetc_mdio_priv *mdio_priv;
189	struct phylink_pcs *phylink_pcs;
190	struct mii_bus *bus;
191	int err;
192
193	if (!pf->ops->create_pcs) {
194		dev_err(dev, "Creating PCS is not supported\n");
195
196		return -EOPNOTSUPP;
197	}
198
199	bus = mdiobus_alloc_size(sizeof(*mdio_priv));
200	if (!bus)
201		return -ENOMEM;
202
203	bus->name = "Freescale ENETC internal MDIO Bus";
204	bus->read = enetc_mdio_read_c22;
205	bus->write = enetc_mdio_write_c22;
206	bus->read_c45 = enetc_mdio_read_c45;
207	bus->write_c45 = enetc_mdio_write_c45;
208	bus->parent = dev;
209	bus->phy_mask = ~0;
210	mdio_priv = bus->priv;
211	mdio_priv->hw = &pf->si->hw;
212	mdio_priv->mdio_base = ENETC_PM_IMDIO_BASE;
213	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-imdio", dev_name(dev));
214
215	err = mdiobus_register(bus);
216	if (err) {
217		dev_err(dev, "cannot register internal MDIO bus (%d)\n", err);
218		goto free_mdio_bus;
219	}
220
221	phylink_pcs = pf->ops->create_pcs(pf, bus);
222	if (IS_ERR(phylink_pcs)) {
223		err = PTR_ERR(phylink_pcs);
224		dev_err(dev, "cannot create lynx pcs (%d)\n", err);
225		goto unregister_mdiobus;
226	}
227
228	pf->imdio = bus;
229	pf->pcs = phylink_pcs;
230
231	return 0;
232
233unregister_mdiobus:
234	mdiobus_unregister(bus);
235free_mdio_bus:
236	mdiobus_free(bus);
237	return err;
238}
239
240static void enetc_imdio_remove(struct enetc_pf *pf)
241{
242	if (pf->pcs && pf->ops->destroy_pcs)
243		pf->ops->destroy_pcs(pf->pcs);
244
245	if (pf->imdio) {
246		mdiobus_unregister(pf->imdio);
247		mdiobus_free(pf->imdio);
248	}
249}
250
251static bool enetc_port_has_pcs(struct enetc_pf *pf)
252{
253	return (pf->if_mode == PHY_INTERFACE_MODE_SGMII ||
254		pf->if_mode == PHY_INTERFACE_MODE_1000BASEX ||
255		pf->if_mode == PHY_INTERFACE_MODE_2500BASEX ||
256		pf->if_mode == PHY_INTERFACE_MODE_USXGMII);
257}
258
259int enetc_mdiobus_create(struct enetc_pf *pf, struct device_node *node)
260{
261	struct device_node *mdio_np;
262	int err;
263
264	mdio_np = of_get_child_by_name(node, "mdio");
265	if (mdio_np) {
266		err = enetc_mdio_probe(pf, mdio_np);
267
268		of_node_put(mdio_np);
269		if (err)
270			return err;
271	}
272
273	if (enetc_port_has_pcs(pf)) {
274		err = enetc_imdio_create(pf);
275		if (err) {
276			enetc_mdio_remove(pf);
277			return err;
278		}
279	}
280
281	return 0;
282}
283EXPORT_SYMBOL_GPL(enetc_mdiobus_create);
284
285void enetc_mdiobus_destroy(struct enetc_pf *pf)
286{
287	enetc_mdio_remove(pf);
288	enetc_imdio_remove(pf);
289}
290EXPORT_SYMBOL_GPL(enetc_mdiobus_destroy);
291
292int enetc_phylink_create(struct enetc_ndev_priv *priv, struct device_node *node,
293			 const struct phylink_mac_ops *ops)
294{
295	struct enetc_pf *pf = enetc_si_priv(priv->si);
296	struct phylink *phylink;
297	int err;
298
299	pf->phylink_config.dev = &priv->ndev->dev;
300	pf->phylink_config.type = PHYLINK_NETDEV;
301	pf->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
302		MAC_10 | MAC_100 | MAC_1000 | MAC_2500FD;
303
304	__set_bit(PHY_INTERFACE_MODE_INTERNAL,
305		  pf->phylink_config.supported_interfaces);
306	__set_bit(PHY_INTERFACE_MODE_SGMII,
307		  pf->phylink_config.supported_interfaces);
308	__set_bit(PHY_INTERFACE_MODE_1000BASEX,
309		  pf->phylink_config.supported_interfaces);
310	__set_bit(PHY_INTERFACE_MODE_2500BASEX,
311		  pf->phylink_config.supported_interfaces);
312	__set_bit(PHY_INTERFACE_MODE_USXGMII,
313		  pf->phylink_config.supported_interfaces);
314	phy_interface_set_rgmii(pf->phylink_config.supported_interfaces);
315
316	phylink = phylink_create(&pf->phylink_config, of_fwnode_handle(node),
317				 pf->if_mode, ops);
318	if (IS_ERR(phylink)) {
319		err = PTR_ERR(phylink);
320		return err;
321	}
322
323	priv->phylink = phylink;
324
325	return 0;
326}
327EXPORT_SYMBOL_GPL(enetc_phylink_create);
328
329void enetc_phylink_destroy(struct enetc_ndev_priv *priv)
330{
331	phylink_destroy(priv->phylink);
332}
333EXPORT_SYMBOL_GPL(enetc_phylink_destroy);
334
335MODULE_DESCRIPTION("NXP ENETC PF common functionality driver");
336MODULE_LICENSE("Dual BSD/GPL");