1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2014-2017 Broadcom
24 #include <linux/platform_data/mdio-bcm-unimac.h>
28 /* setup netdev link state when PHY link status change and
29  * update UMAC and RGMII block when link up
34 	struct phy_device *phydev = dev->phydev;  in bcmgenet_mii_setup()
38 	if (priv->old_link != phydev->link) {  in bcmgenet_mii_setup()
40 		priv->old_link = phydev->link;  in bcmgenet_mii_setup()
43 	if (phydev->link) {  in bcmgenet_mii_setup()
44 		/* check speed/duplex/pause changes */  in bcmgenet_mii_setup()
45 		if (priv->old_speed != phydev->speed) {  in bcmgenet_mii_setup()
47 			priv->old_speed = phydev->speed;  in bcmgenet_mii_setup()
50 		if (priv->old_duplex != phydev->duplex) {  in bcmgenet_mii_setup()
52 			priv->old_duplex = phydev->duplex;  in bcmgenet_mii_setup()
55 		if (priv->old_pause != phydev->pause) {  in bcmgenet_mii_setup()
57 			priv->old_pause = phydev->pause;  in bcmgenet_mii_setup()
64 		/* speed */  in bcmgenet_mii_setup()
65 		if (phydev->speed == SPEED_1000)  in bcmgenet_mii_setup()
67 		else if (phydev->speed == SPEED_100)  in bcmgenet_mii_setup()
74 		if (phydev->duplex != DUPLEX_FULL)  in bcmgenet_mii_setup()
78 		if (!phydev->pause)  in bcmgenet_mii_setup()
83 		 * link speed, duplex, and pause. The speed set in  in bcmgenet_mii_setup()
84 		 * umac->cmd tell RGMII block which clock to use for  in bcmgenet_mii_setup()
85 		 * transmit -- 25MHz(100Mbps) or 125MHz(1Gbps).  in bcmgenet_mii_setup()
110 		/* needed for MoCA fixed PHY to reflect correct link status */  in bcmgenet_mii_setup()
124 	if (dev && dev->phydev && status) {  in bcmgenet_fixed_phy_link_update()
127 		status->link = !!(reg & MODE_LINK_STATUS);  in bcmgenet_fixed_phy_link_update()
171 		/* Speed settings are set in bcmgenet_mii_setup() */  in bcmgenet_moca_phy_setup()
177 	if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET)  in bcmgenet_moca_phy_setup()
178 		fixed_phy_set_link_update(priv->dev->phydev,  in bcmgenet_moca_phy_setup()
185 	struct phy_device *phydev = dev->phydev;  in bcmgenet_mii_config()
186 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_mii_config()
192 	switch (priv->phy_interface) {  in bcmgenet_mii_config()
197 		/* Irrespective of the actually configured PHY speed (100 or  in bcmgenet_mii_config()
221 		/* of_mdiobus_register took care of reading the 'max-speed'  in bcmgenet_mii_config()
227 				      dev->phydev->supported))  in bcmgenet_mii_config()
235 		 *		(requires PCB or receiver-side delay)  in bcmgenet_mii_config()
255 		dev_err(kdev, "unknown phy mode: %d\n", priv->phy_interface);  in bcmgenet_mii_config()
256 		return -EINVAL;  in bcmgenet_mii_config()
261 	priv->ext_phy = !priv->internal_phy &&  in bcmgenet_mii_config()
262 			(priv->phy_interface != PHY_INTERFACE_MODE_MOCA);  in bcmgenet_mii_config()
267 	if (priv->ext_phy) {  in bcmgenet_mii_config()
287 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_mii_probe()
288 	struct device_node *dn = kdev->of_node;  in bcmgenet_mii_probe()
294 	if (priv->internal_phy)  in bcmgenet_mii_probe()
295 		phy_flags = priv->gphy_rev;  in bcmgenet_mii_probe()
297 	/* Initialize link state variables that bcmgenet_mii_setup() uses */  in bcmgenet_mii_probe()
298 	priv->old_link = -1;  in bcmgenet_mii_probe()
299 	priv->old_speed = -1;  in bcmgenet_mii_probe()
300 	priv->old_duplex = -1;  in bcmgenet_mii_probe()
301 	priv->old_pause = -1;  in bcmgenet_mii_probe()
304 		phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup,  in bcmgenet_mii_probe()
305 					phy_flags, priv->phy_interface);  in bcmgenet_mii_probe()
308 			return -ENODEV;  in bcmgenet_mii_probe()
315 			snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d",  in bcmgenet_mii_probe()
316 				 UNIMAC_MDIO_DRV_NAME, priv->pdev->id);  in bcmgenet_mii_probe()
321 				return -ENODEV;  in bcmgenet_mii_probe()
324 			put_device(&unimacbus->dev);  in bcmgenet_mii_probe()
327 				return -ENODEV;  in bcmgenet_mii_probe()
330 			phydev = dev->phydev;  in bcmgenet_mii_probe()
332 		phydev->dev_flags = phy_flags;  in bcmgenet_mii_probe()
335 					 priv->phy_interface);  in bcmgenet_mii_probe()
338 			return -ENODEV;  in bcmgenet_mii_probe()
343 	 * reading the 'max-speed' property determines the maximum supported  in bcmgenet_mii_probe()
344 	 * PHY speed which is needed for bcmgenet_mii_config() to configure  in bcmgenet_mii_probe()
349 		phy_disconnect(dev->phydev);  in bcmgenet_mii_probe()
353 	linkmode_copy(phydev->advertising, phydev->supported);  in bcmgenet_mii_probe()
355 	/* The internal PHY has its link interrupts routed to the  in bcmgenet_mii_probe()
357 	 * that prevents the signaling of link UP interrupts when  in bcmgenet_mii_probe()
358 	 * the link operates at 10Mbps, so fallback to polling for  in bcmgenet_mii_probe()
361 	if (priv->internal_phy && !GENET_IS_V5(priv))  in bcmgenet_mii_probe()
362 		dev->phydev->irq = PHY_IGNORE_INTERRUPT;  in bcmgenet_mii_probe()
369 	struct device_node *dn = priv->pdev->dev.of_node;  in bcmgenet_mii_of_find_mdio()
370 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_mii_of_find_mdio()
373 	compat = kasprintf(GFP_KERNEL, "brcm,genet-mdio-v%d", priv->version);  in bcmgenet_mii_of_find_mdio()
377 	priv->mdio_dn = of_get_compatible_child(dn, compat);  in bcmgenet_mii_of_find_mdio()
379 	if (!priv->mdio_dn) {  in bcmgenet_mii_of_find_mdio()
384 	return priv->mdio_dn;  in bcmgenet_mii_of_find_mdio()
390 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_mii_pdata_init()
391 	struct bcmgenet_platform_data *pd = kdev->platform_data;  in bcmgenet_mii_pdata_init()
393 	if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {  in bcmgenet_mii_pdata_init()
397 		if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)  in bcmgenet_mii_pdata_init()
398 			ppd->phy_mask = 1 << pd->phy_address;  in bcmgenet_mii_pdata_init()
400 			ppd->phy_mask = 0;  in bcmgenet_mii_pdata_init()
408 	wait_event_timeout(priv->wq,  in bcmgenet_mii_wait()
417 	struct platform_device *pdev = priv->pdev;  in bcmgenet_mii_register()
418 	struct bcmgenet_platform_data *pdata = pdev->dev.platform_data;  in bcmgenet_mii_register()
419 	struct device_node *dn = pdev->dev.of_node;  in bcmgenet_mii_register()
434 	 * and is 2 * 32-bits word long, 8 bytes total.  in bcmgenet_mii_register()
436 	res.start = pres->start + GENET_UMAC_OFF + UMAC_MDIO_CMD;  in bcmgenet_mii_register()
443 		id = pdev->id;  in bcmgenet_mii_register()
447 		return -ENOMEM;  in bcmgenet_mii_register()
450 	priv->mii_pdev = ppdev;  in bcmgenet_mii_register()
451 	ppdev->dev.parent = &pdev->dev;  in bcmgenet_mii_register()
453 		ppdev->dev.of_node = bcmgenet_mii_of_find_mdio(priv);  in bcmgenet_mii_register()
479 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_phy_interface_init()
487 	priv->phy_interface = phy_mode;  in bcmgenet_phy_interface_init()
494 	if (priv->phy_interface == PHY_INTERFACE_MODE_INTERNAL)  in bcmgenet_phy_interface_init()
495 		priv->internal_phy = true;  in bcmgenet_phy_interface_init()
502 	struct device_node *dn = priv->pdev->dev.of_node;  in bcmgenet_mii_of_init()
507 	priv->phy_dn = of_parse_phandle(dn, "phy-handle", 0);  in bcmgenet_mii_of_init()
512 	if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {  in bcmgenet_mii_of_init()
517 		priv->phy_dn = of_node_get(dn);  in bcmgenet_mii_of_init()
520 	/* Get the link mode */  in bcmgenet_mii_of_init()
525 	/* Make sure we initialize MoCA PHYs with a link down */  in bcmgenet_mii_of_init()
526 	if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {  in bcmgenet_mii_of_init()
529 			phydev->link = 0;  in bcmgenet_mii_of_init()
530 			put_device(&phydev->mdio.dev);  in bcmgenet_mii_of_init()
539 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_mii_pd_init()
540 	struct bcmgenet_platform_data *pd = kdev->platform_data;  in bcmgenet_mii_pd_init()
545 	snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d",  in bcmgenet_mii_pd_init()
546 		 UNIMAC_MDIO_DRV_NAME, priv->pdev->id);  in bcmgenet_mii_pd_init()
548 	if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {  in bcmgenet_mii_pd_init()
550 			 mdio_bus_id, pd->phy_address);  in bcmgenet_mii_pd_init()
555 		phydev = phy_attach(priv->dev, phy_name, pd->phy_interface);  in bcmgenet_mii_pd_init()
558 			return -ENODEV;  in bcmgenet_mii_pd_init()
563 		 * Use fixed PHY to represent the link layer.  in bcmgenet_mii_pd_init()
566 			.link = 1,  in bcmgenet_mii_pd_init()
567 			.speed = pd->phy_speed,  in bcmgenet_mii_pd_init()
568 			.duplex = pd->phy_duplex,  in bcmgenet_mii_pd_init()
576 			return -ENODEV;  in bcmgenet_mii_pd_init()
579 		/* Make sure we initialize MoCA PHYs with a link down */  in bcmgenet_mii_pd_init()
580 		phydev->link = 0;  in bcmgenet_mii_pd_init()
584 	priv->phy_interface = pd->phy_interface;  in bcmgenet_mii_pd_init()
591 	struct device *kdev = &priv->pdev->dev;  in bcmgenet_mii_bus_init()
592 	struct device_node *dn = kdev->of_node;  in bcmgenet_mii_bus_init()
625 	struct device_node *dn = priv->pdev->dev.of_node;  in bcmgenet_mii_exit()
629 	of_node_put(priv->phy_dn);  in bcmgenet_mii_exit()
630 	platform_device_unregister(priv->mii_pdev);  in bcmgenet_mii_exit()