예제 #1
0
파일: bgmac.c 프로젝트: 545191228/linux
static int bgmac_fixed_phy_register(struct bgmac *bgmac)
{
	struct fixed_phy_status fphy_status = {
		.link = 1,
		.speed = SPEED_1000,
		.duplex = DUPLEX_FULL,
	};
	struct phy_device *phy_dev;
	int err;

	phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, -1, NULL);
	if (!phy_dev || IS_ERR(phy_dev)) {
		bgmac_err(bgmac, "Failed to register fixed PHY device\n");
		return -ENODEV;
	}

	err = phy_connect_direct(bgmac->net_dev, phy_dev, bgmac_adjust_link,
				 PHY_INTERFACE_MODE_MII);
	if (err) {
		bgmac_err(bgmac, "Connecting PHY failed\n");
		return err;
	}

	bgmac->phy_dev = phy_dev;

	return err;
}

static int bgmac_mii_register(struct bgmac *bgmac)
{
	struct mii_bus *mii_bus;
	struct phy_device *phy_dev;
	char bus_id[MII_BUS_ID_SIZE + 3];
	int err = 0;

	if (bgmac_is_bcm4707_family(bgmac))
		return bgmac_fixed_phy_register(bgmac);

	mii_bus = mdiobus_alloc();
	if (!mii_bus)
		return -ENOMEM;

	mii_bus->name = "bgmac mii bus";
	sprintf(mii_bus->id, "%s-%d-%d", "bgmac", bgmac->core->bus->num,
		bgmac->core->core_unit);
	mii_bus->priv = bgmac;
	mii_bus->read = bgmac_mii_read;
	mii_bus->write = bgmac_mii_write;
	mii_bus->parent = &bgmac->core->dev;
	mii_bus->phy_mask = ~(1 << bgmac->phyaddr);

	err = mdiobus_register(mii_bus);
	if (err) {
		bgmac_err(bgmac, "Registration of mii bus failed\n");
		goto err_free_bus;
	}

	bgmac->mii_bus = mii_bus;

	/* Connect to the PHY */
	snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
		 bgmac->phyaddr);
	phy_dev = phy_connect(bgmac->net_dev, bus_id, &bgmac_adjust_link,
			      PHY_INTERFACE_MODE_MII);
	if (IS_ERR(phy_dev)) {
		bgmac_err(bgmac, "PHY connection failed\n");
		err = PTR_ERR(phy_dev);
		goto err_unregister_bus;
	}
	bgmac->phy_dev = phy_dev;

	return err;

err_unregister_bus:
	mdiobus_unregister(mii_bus);
err_free_bus:
	mdiobus_free(mii_bus);
	return err;
}

static void bgmac_mii_unregister(struct bgmac *bgmac)
{
	struct mii_bus *mii_bus = bgmac->mii_bus;

	mdiobus_unregister(mii_bus);
	mdiobus_free(mii_bus);
}

/**************************************************
 * BCMA bus ops
 **************************************************/

/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
static int bgmac_probe(struct bcma_device *core)
{
	struct net_device *net_dev;
	struct bgmac *bgmac;
	struct ssb_sprom *sprom = &core->bus->sprom;
	u8 *mac;
	int err;

	switch (core->core_unit) {
	case 0:
		mac = sprom->et0mac;
		break;
	case 1:
		mac = sprom->et1mac;
		break;
	case 2:
		mac = sprom->et2mac;
		break;
	default:
		pr_err("Unsupported core_unit %d\n", core->core_unit);
		return -ENOTSUPP;
	}

	if (!is_valid_ether_addr(mac)) {
		dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac);
		eth_random_addr(mac);
		dev_warn(&core->dev, "Using random MAC: %pM\n", mac);
	}

	/* This (reset &) enable is not preset in specs or reference driver but
	 * Broadcom does it in arch PCI code when enabling fake PCI device.
	 */
	bcma_core_enable(core, 0);

	/* Allocation and references */
	net_dev = alloc_etherdev(sizeof(*bgmac));
	if (!net_dev)
		return -ENOMEM;
	net_dev->netdev_ops = &bgmac_netdev_ops;
	net_dev->irq = core->irq;
	net_dev->ethtool_ops = &bgmac_ethtool_ops;
	bgmac = netdev_priv(net_dev);
	bgmac->net_dev = net_dev;
	bgmac->core = core;
	bcma_set_drvdata(core, bgmac);

	/* Defaults */
	memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN);

	/* On BCM4706 we need common core to access PHY */
	if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
	    !core->bus->drv_gmac_cmn.core) {
		bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n");
		err = -ENODEV;
		goto err_netdev_free;
	}
	bgmac->cmn = core->bus->drv_gmac_cmn.core;

	switch (core->core_unit) {
	case 0:
		bgmac->phyaddr = sprom->et0phyaddr;
		break;
	case 1:
		bgmac->phyaddr = sprom->et1phyaddr;
		break;
	case 2:
		bgmac->phyaddr = sprom->et2phyaddr;
		break;
	}
	bgmac->phyaddr &= BGMAC_PHY_MASK;
	if (bgmac->phyaddr == BGMAC_PHY_MASK) {
		bgmac_err(bgmac, "No PHY found\n");
		err = -ENODEV;
		goto err_netdev_free;
	}
	bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr,
		   bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");

	if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
		bgmac_err(bgmac, "PCI setup not implemented\n");
		err = -ENOTSUPP;
		goto err_netdev_free;
	}

	bgmac_chip_reset(bgmac);

	/* For Northstar, we have to take all GMAC core out of reset */
	if (bgmac_is_bcm4707_family(bgmac)) {
		struct bcma_device *ns_core;
		int ns_gmac;

		/* Northstar has 4 GMAC cores */
		for (ns_gmac = 0; ns_gmac < 4; ns_gmac++) {
			/* As Northstar requirement, we have to reset all GMACs
			 * before accessing one. bgmac_chip_reset() call
			 * bcma_core_enable() for this core. Then the other
			 * three GMACs didn't reset.  We do it here.
			 */
			ns_core = bcma_find_core_unit(core->bus,
						      BCMA_CORE_MAC_GBIT,
						      ns_gmac);
			if (ns_core && !bcma_core_is_enabled(ns_core))
				bcma_core_enable(ns_core, 0);
		}
	}

	err = bgmac_dma_alloc(bgmac);
	if (err) {
		bgmac_err(bgmac, "Unable to alloc memory for DMA\n");
		goto err_netdev_free;
	}

	bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
	if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
		bgmac->int_mask &= ~BGMAC_IS_TX_MASK;

	/* TODO: reset the external phy. Specs are needed */
	bgmac_phy_reset(bgmac);

	bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo &
			       BGMAC_BFL_ENETROBO);
	if (bgmac->has_robosw)
		bgmac_warn(bgmac, "Support for Roboswitch not implemented\n");

	if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM)
		bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n");

	netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT);

	err = bgmac_mii_register(bgmac);
	if (err) {
		bgmac_err(bgmac, "Cannot register MDIO\n");
		goto err_dma_free;
	}

	net_dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
	net_dev->hw_features = net_dev->features;
	net_dev->vlan_features = net_dev->features;

	err = register_netdev(bgmac->net_dev);
	if (err) {
		bgmac_err(bgmac, "Cannot register net device\n");
		goto err_mii_unregister;
	}

	netif_carrier_off(net_dev);

	return 0;

err_mii_unregister:
	bgmac_mii_unregister(bgmac);
err_dma_free:
	bgmac_dma_free(bgmac);

err_netdev_free:
	bcma_set_drvdata(core, NULL);
	free_netdev(net_dev);

	return err;
}

static void bgmac_remove(struct bcma_device *core)
{
	struct bgmac *bgmac = bcma_get_drvdata(core);

	unregister_netdev(bgmac->net_dev);
	bgmac_mii_unregister(bgmac);
	netif_napi_del(&bgmac->napi);
	bgmac_dma_free(bgmac);
	bcma_set_drvdata(core, NULL);
	free_netdev(bgmac->net_dev);
}

static struct bcma_driver bgmac_bcma_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= bgmac_bcma_tbl,
	.probe		= bgmac_probe,
	.remove		= bgmac_remove,
};

static int __init bgmac_init(void)
{
	int err;

	err = bcma_driver_register(&bgmac_bcma_driver);
	if (err)
		return err;
	pr_info("Broadcom 47xx GBit MAC driver loaded\n");

	return 0;
}
예제 #2
0
파일: bgmac.c 프로젝트: 7799/linux
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
static int bgmac_probe(struct bcma_device *core)
{
	struct net_device *net_dev;
	struct bgmac *bgmac;
	struct ssb_sprom *sprom = &core->bus->sprom;
	u8 *mac = core->core_unit ? sprom->et1mac : sprom->et0mac;
	int err;

	/* We don't support 2nd, 3rd, ... units, SPROM has to be adjusted */
	if (core->core_unit > 1) {
		pr_err("Unsupported core_unit %d\n", core->core_unit);
		return -ENOTSUPP;
	}

	if (!is_valid_ether_addr(mac)) {
		dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac);
		eth_random_addr(mac);
		dev_warn(&core->dev, "Using random MAC: %pM\n", mac);
	}

	/* Allocation and references */
	net_dev = alloc_etherdev(sizeof(*bgmac));
	if (!net_dev)
		return -ENOMEM;
	net_dev->netdev_ops = &bgmac_netdev_ops;
	net_dev->irq = core->irq;
	SET_ETHTOOL_OPS(net_dev, &bgmac_ethtool_ops);
	bgmac = netdev_priv(net_dev);
	bgmac->net_dev = net_dev;
	bgmac->core = core;
	bcma_set_drvdata(core, bgmac);

	/* Defaults */
	memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN);

	/* On BCM4706 we need common core to access PHY */
	if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
	    !core->bus->drv_gmac_cmn.core) {
		bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n");
		err = -ENODEV;
		goto err_netdev_free;
	}
	bgmac->cmn = core->bus->drv_gmac_cmn.core;

	bgmac->phyaddr = core->core_unit ? sprom->et1phyaddr :
			 sprom->et0phyaddr;
	bgmac->phyaddr &= BGMAC_PHY_MASK;
	if (bgmac->phyaddr == BGMAC_PHY_MASK) {
		bgmac_err(bgmac, "No PHY found\n");
		err = -ENODEV;
		goto err_netdev_free;
	}
	bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr,
		   bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");

	if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
		bgmac_err(bgmac, "PCI setup not implemented\n");
		err = -ENOTSUPP;
		goto err_netdev_free;
	}

	bgmac_chip_reset(bgmac);

	/* For Northstar, we have to take all GMAC core out of reset */
	if (core->id.id == BCMA_CHIP_ID_BCM4707 ||
	    core->id.id == BCMA_CHIP_ID_BCM53018) {
		struct bcma_device *ns_core;
		int ns_gmac;

		/* Northstar has 4 GMAC cores */
		for (ns_gmac = 0; ns_gmac < 4; ns_gmac++) {
			/* As Northstar requirement, we have to reset all GMACs
			 * before accessing one. bgmac_chip_reset() call
			 * bcma_core_enable() for this core. Then the other
			 * three GMACs didn't reset.  We do it here.
			 */
			ns_core = bcma_find_core_unit(core->bus,
						      BCMA_CORE_MAC_GBIT,
						      ns_gmac);
			if (ns_core && !bcma_core_is_enabled(ns_core))
				bcma_core_enable(ns_core, 0);
		}
	}

	err = bgmac_dma_alloc(bgmac);
	if (err) {
		bgmac_err(bgmac, "Unable to alloc memory for DMA\n");
		goto err_netdev_free;
	}

	bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
	if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
		bgmac->int_mask &= ~BGMAC_IS_TX_MASK;

	/* TODO: reset the external phy. Specs are needed */
	bgmac_phy_reset(bgmac);

	bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo &
			       BGMAC_BFL_ENETROBO);
	if (bgmac->has_robosw)
		bgmac_warn(bgmac, "Support for Roboswitch not implemented\n");

	if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM)
		bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n");

	err = bgmac_mii_register(bgmac);
	if (err) {
		bgmac_err(bgmac, "Cannot register MDIO\n");
		goto err_dma_free;
	}

	err = register_netdev(bgmac->net_dev);
	if (err) {
		bgmac_err(bgmac, "Cannot register net device\n");
		goto err_mii_unregister;
	}

	netif_carrier_off(net_dev);

	netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT);

	return 0;

err_mii_unregister:
	bgmac_mii_unregister(bgmac);
err_dma_free:
	bgmac_dma_free(bgmac);

err_netdev_free:
	bcma_set_drvdata(core, NULL);
	free_netdev(net_dev);

	return err;
}